Wrought iron fence construction organization design

Iron wall construction organization design

Chapter 1 Project Overview

Project name: Building 38#, Graduate Apartment, Xiasha Campus, Hangzhou University of Electronic Science and Technology

< p>Construction unit: Hangzhou University of Electronic Science and Technology

Design unit: Zhejiang Urban Construction Architectural Design Institute

Supervision unit: Nanjing Huaning Engineering Supervision Company

Construction unit: Shaoxing No. 1 Construction Engineering Group Co., Ltd.

Project location: Block G, Xigong Logistics Facilities Public Construction Project, Xiasha Higher Education Park, Hangzhou

This project is located in Xuelin, Xiasha Higher Education Park, Hangzhou At the intersection of Wenjin Street and Wenjin Road, there is a total frame shear wall structure.

Chapter 2 Fence Layout

1. This project is located on the west side of the site for the Engineering College student dormitory. The original 2.5M high fence will be repainted and renovated this time. To the north is the student dormitory of the School of Metrology, with the original color steel isolation wall. The construction site of Wakayama Construction Company in the south is separated by color steel plates. To the north is Wenjin Road. The bottom of the brick wall is 30 cm high, and the upper part is made of color steel plates and fixed with square steel. The gate is set on the south side, and brick walls are built on both sides of the road leading in and out of Wakayama Construction Company. They are painted and written with slogans.

2. Set up wall tops and door light boxes according to the company’s unified requirements, and complete the lighting project.

Chapter 3 Wall Structure Calculation

1. Wall anti-overturning stability check (geometric dimensions as shown)

b/kΨH=

=17x0.24/1.12x0.3

=2.9(m)>2.5m meets the requirements

In the formula: K-anti-overturning safety factor, the wall thickness is 240 , take K=1.12;

Ψ-wind load, take Ψ=0.3KN/㎡ according to the local basic wind pressure

h-allowable free height of brick wall construction

-Weight of brick masonry

b—Wall thickness

2. Calculation of height-to-thickness ratio (geometric dimensions are as shown in the attached picture)

Geometric dimensions of wall section As shown in the attached figure

The cross-sectional area A=5000×24240×120=1228800 mm

The center of gravity axis Y1=∑ (AiYi)/A

=( 5000×240×12120×240×300)÷1228800=124 mm

Y2=360－124=236 mm

Moment of inertia I=∑(IAa)< /p>

=1/12×5000×2403+5000×240×(124-120) +1/12×240×1203×(236-60) =1.628×1011 mm4

Radius of gyration i=(I/A)1/2=(1.628×1011/1228800)1/2

=364 mm

Wall thickness ht=3.5i=364 ×3.5=1274 mm

②. Calculation of height-thickness ratio of the entire wall

Take H0=H=2.5m

Height-thickness ratio β= H0/ ht =2.5/1.274=1.96

Take μ1=1.2 μ2=1

μ1μ2[β]=1.2×1×24=28.8﹥1.96 meets the requirements

③. Calculation of height-thickness ratio of wall between pilasters (calculated according to rigid scheme)

H0=0.4s+0.2H=2+0.5=2.5 m

Height-thickness ratio β=2.5 /0.24=10.4﹤28.8 Meets the requirements

④Foundation soil bearing capacity verification

Wall self-weight N=[2.5×0.24+0.36×(0.06+0.12)] ×17+0.56 ×0.3×23=15.17 KN﹤fk

In the formula: fk - standard value of foundation soil bearing capacity

Chapter 4 Fence Practices

1. Excavation Then compact the plain soil.

2. Use rough stone foundation and M5 mixed mortar for masonry construction.

3. The fence is built with M10 standard bricks and M5 mixed mortar.

4. The brick pillars of the main gate are 500*500MM and are built with standard bricks, cement mortar and a height of 5M.

5. Set up a wall brick column every 5 meters.

6. Double-paint the fence.

Chapter 5 Precautions

1. It is strictly prohibited to pile sand and gravel and other bulk materials against the fence.

2. Strictly prevent the foundation of the fence from being washed away by strong rainwater.

Construction Organization Design of Auxiliary Fence Project

1. Project Overview and Construction Conditions

This project is an auxiliary fence project and will be constructed by the Engineering Corporation.

(1) Overview of the construction part:

The main construction methods are as follows:

1. Wall: below +0.00, use 10CM thick C10 concrete cushion, MU10 Standard bricks, M7.5 cement mortar for masonry; +0.00 and above use MU10 standard bricks, M7.5 mixed mortar for masonry;

(2) Overview of structural parts:

1. Foundation

Below 0.00, use 10CM thick C10 concrete cushion, MU10 standard brick, M7.5 cement mortar

2. Wall:

（ 1) Masonry materials:

Using MU10 standard bricks and M7.5 cement mortar for masonry construction below ±0.00m

MU10 standard bricks and M7.5 mixed mortar for construction above ±0.00m Masonry;

(2) Types and labels of masonry mortar

Use M7.5 cement mortar below ±0.00m

Use M7 above ±0.00m. 5 Mix the mortar.

Mixed mortar for painting inside and outside M10, 2CM.

(3) Construction conditions

1. Water and electricity are basically in place, and the site access roads are leveled.

2. Arrangement of mechanical equipment and construction personnel

It is equipped with two 350-type mixers. It is calculated that their mechanical performance and coverage can meet the construction requirements. Please see the attached table for details of the arrangements for mechanical equipment and construction personnel.

2. Construction preparations and site layout:

(1) Technical preparations:

1. Joint review of drawings.

2. Sign the construction contract and various work agreements.

3. Analyze various materials according to the budget, determine their usage, determine their entry date and volume according to the construction progress requirements, organize material procurement personnel to confirm the sources of all materials, and arrange procurement projects The required materials are ensured to be available as scheduled at the start of construction and at each construction stage.

4. Based on the survey of the construction site’s landforms and the site conditions, it is planned to employ earthwork excavation personnel.

5. Measurement and setting out: Check and accept the red line piles, use the known axis and coordinate points after review, and measure the main axis of the new fence according to the general plan, bury the permanent axis control piles, and do Good building location acceptance visa procedures.

(2) Electricity for construction

Electricity at the construction site shall be arranged in accordance with the city’s temporary electricity requirements. A main distribution box will be installed at the construction power entrance, and a distribution box will be installed in each mixing shed and site. Power lines will be erected around the proposed building, and a distribution box will be installed on each of the south, north, and west facades. Only.

All electrical lines adopt a three-phase five-wire system, and mechanical power and lighting power are set separately to comply with the requirements of the power supply operating regulations.

(3) Construction water

After on-site investigation, water from the Li Canal will be used for centralized supply.

On site, P100mm steel pipes are selected as the inlet main water supply pipes, and P50mm water supply pipes are used on site to meet the water needs of the project construction.

P50mm water pipes are laid at the construction site, and faucets are installed at the mixing shed to meet water needs for construction.

(4) Construction general layout plan

The construction site is arranged according to the requirements of excellent projects, based on the on-site survey situation, the requirements of excellent projects, and the convenience of construction, etc. Consider on-site hardening. For details of the site layout, see Attachment 1: General construction layout plan.

3. Configuration of labor force and construction machinery

Strive to achieve careful organization, overall arrangements, and comprehensive coordination among various units and professional types of work during the entire construction process. Managers should be responsible for each other and focus on on-site management, command and coordination, and inspection and implementation.

(1) Construction management organization

Carefully organize the project management team of the project and select comrades with rich construction experience as project managers to organize the construction.

During the entire project construction process, the project manager is responsible for all construction management work such as engineering technology, quality, construction period, and safety production management on site to ensure that the project is completed according to quality and on schedule.

1. The details of the construction organization and management network are as follows:

Construction organization and management network

2. Labor arrangements during construction

For details, see the major List of work types (Appendix 2)

The entry time and number of people can be temporarily adjusted according to the actual needs of the site.

(2) Mechanical equipment list

For details, please refer to the main mechanical equipment list (Appendix 1)

IV. Construction methods of important parts

< p>(1) Earthwork and foundation engineering

1. Measurement and setting out

(1) Layout of measurement control network in the construction site area

Before the start of the project , using the coordinate control points and level points provided by the construction unit and planning department, to lay out the coordinate control network and elevation control network in the site area, which facilitates the measurement and setting of the axis and elevation of the building, and also facilitates review of the measurement results.

(2) Measurement and design of building axis control network

① Determine two permanent measurement control axes in both vertical and horizontal aspects

② Before foundation construction, the above-mentioned control axes are measured and set within 10-15m outside the main building. Double points are set on each side of each control axis to facilitate the one-sided leading axis and calibration axis. Each point is used as a gantry pile. The sign (the outer extension line point can be set on a fixed building far away from the periphery) can be led to the wall of an adjacent fixed building. During foundation construction, use the gantry pile as the reference point and use theodolite to guide the control axis. measured into the foundation pit of the proposed building.

③When the construction reaches ±0.00m, use theodolite to measure the control axis on the gantry piles on the brickwork, and lay out the foundation points to guide the control axis of each layer.

④After measuring and setting the control axis, use theodolite and steel tape measure to measure and set other axes and control axes of each layer.

(3) Elevation measurement and transmission

① Before formal construction, use the site elevation control network to lay out two to three elevations within a range of 8-15m outside the building. The rear sight point must be visible to the building. The elevation point can be directed to a wall with relatively stable settlement for reference, but it cannot be directed to a nearby building or structure.

②Use a level, ruler and steel tape measure to pass upward from the base elevation of the ground along the outer surface of the exterior wall. They can be drawn up on both sides of the building, and the two introduced elevation points can be measured. The elevations should be cross-checked and corrected to minimize measurement errors.

(5) Transmission of measurement information:

① After each axis or elevation measurement, the construction surveyor must report the measurement location and elevation in writing to the relevant workers. The supervisor and technical person in charge conduct technical explanations and handovers, and the technical person in charge and the corresponding foreman sign and accept after review and confirmation.

②The foreman accepts the axis and elevation of each section from the construction surveyor as the backsight point, and then measures the specific location and elevation of each component.

(6) After measuring and setting the axis of each floor, the construction surveyor must check the verticality of each diagonal point of the building. If the deviation exceeds the standard, the construction surveyor should work with the foreman and technical person in charge to find out the reason. , take certain technical measures to eliminate the hidden danger of excessive measurement deviation.

2. Earth excavation and backfilling:

(1) Excavation

Since this project uses strip brick foundation, considering the type of foundation, it can Overall excavation is adopted, and all earthwork is excavated mechanically.

When excavating earthwork, you should first read the geological exploration report of the project. If the soil quality is poor, sloping excavation can be used; if the soil quality is good, over-excavation is not allowed, and the excavation depth is shallow, then Excavation without grading can be used, depending on the actual situation.

During construction, a sump pit should be set up on site for drainage. With the excavation of the foundation pit, the depth of the sump pit should be deepened to ensure that the groundwater level is below the ground trough to prevent the soil layer on the pit wall from being affected by surface water and groundwater. It is humidified due to the influence, and the cohesion is reduced, which causes the slope to become unstable and cause landslides under the action of gravity.

A drainage ditch or retaining embankment should be set outside the upper entrance of the foundation pit to prevent surface water from flowing into the foundation pit. A certain distance should be maintained between the top of the slope and the drainage ditch, generally 0.5-1.0m.

When excavating earth, avoid piling soil on the slope. The excavated earth should be piled at the designated storage point. The distance between the piled soil and the top edge of the slope should not be less than 1m. When the soil quality is poor, it should not be piled up. Less than 2m. The height of the pile shall not exceed 1.50m.

Before earth excavation, the amount of remaining soil should be calculated based on actual conditions such as foundation trench excavation, indoor and outdoor height differences, natural floor elevation, etc., and should be transported outside during excavation to reduce site waste. No need to occupy.

(2) Earthwork backfill

Earth should be backfilled in layers and compacted layer by layer. The thickness of each layer of backfill should not be greater than 300mm. When the width of the foundation pit is narrow, manual compaction should be used. Before backfilling, accumulated water and debris in the foundation pit should be removed. If the groundwater level is high, drainage measures should also be considered.

The backfill soil materials should comply with regulations. Clay soil, silty soil with a large water content, impurity soil containing turf, garbage soil left over from the demolition of original buildings, etc. shall not be used as backfill soil. The filling material shall not contain soil clods with a diameter greater than 50mm, and there should not be too many dry soil clods to avoid incomplete tamping and filling.

When there is excess soil to be transported out of the foundation trench excavation, the miscellaneous fill soil on the upper surface of the natural floor should be transported out first, and the better soil should be used for backfilling.

3. Foundation Engineering

(1) Foundation Cushion Concrete

During foundation concrete construction, the concrete cushion layer and surface must be cleaned and there is no accumulation of water. No soil should fall into the groove. When supporting the side formwork on the foundation pit wall, attention must be paid to the stability of the reinforcement. The formwork support rods must not be directly supported on the soil wall. The lower opening of the support must be supported on the dense soil layer with a pad. Prevent formwork from running out due to weak support when pouring concrete. The foundation beam formwork can be reinforced with diagonal braces and opposite braces. The width of specially made bayonet steel bars or angle steel at the upper part of the beam body should be limited.

When pouring foundation concrete, no construction joints shall be left.

(2) Brick foundation

Before the construction of the brick foundation, when backfilling the soil on the side of the foundation beam, avoid scattering soil on the foundation beam, and if so, clean the top of the foundation beam. Clean, pop up the center line and edge line of the brick foundation, lay a layer of cement mortar on it, level the local unevenness on the wall above the foundation beam, and then lay the bricks to build the wall. You can also backfill the soil after the brick foundation is laid to keep the original concrete surface clean during the brick foundation laying stage, so as to further ensure the quality of the masonry.

(2) Main structure project

1. Wall project

Masonry materials for this project:

Bricks for wall:

(1)Masonry materials:

MU10 standard bricks are used for construction below ±0.00m, and M7.5 cement mortar is used for masonry construction.

MU10 is used for construction above ±0.00m. Standard bricks, M7.5 mixed mortar for masonry construction;

(2) Types and labels of masonry mortar

M7.5 cement mortar shall be used if the height is below ±0.00m

The seismic tie bars must be placed, and the quality of the masonry must meet the requirements of "inner three degrees" and "outer three degrees" proposed by the acceptance standards.

(1) Materials used in masonry projects must be tested before use, and unqualified materials are strictly prohibited.

(2) Masonry mortar: The mortar variety and label must meet the design requirements. The yellow sand must not contain debris. Tap water is used. The impurity content of the yellow sand is controlled to be less than 3%. After the lime paste enters the site Drying and pollution should be prevented, and the use of dehydrated and hardened lime paste and unqualified lime paste is strictly prohibited.

The mixing of mortar should be carried out in a certain order. Generally, the materials are added in two times. First, add part of the yellow sand, water and all the plasticizing materials (lime paste or micro-powder) and stir to open the plasticizing materials ( until no lumps are visible), then add the rest of the yellow sand and all the cement, and mix until the mortar has the same color.

(3) Construction preparation. Bricks or blocks must be soaked with water before laying, but the site must not be overly wet or unevenly wet.

(4) Before masonry, the mortar debris on the surface of the base must be cleaned up and watered to moisten it. At the same time, it should be tested; before masonry, openings and pipes should be reserved and embedded according to the design requirements of the drawings. pieces.

(5) The brickwork construction specifications should be strictly followed. Calculate the skin number of the bricks on the layer, the thickness of the mortar joints and other data based on the floor height, window sill and window top height, and pop up the wall at the construction site. On the axis, set up the skin rod, control the thickness of the mortar joints to control the height of the masonry, and use three-quarter bricks or small-sized blocks with whole bricks to build the corners and wall ends to achieve the purpose of staggered joints.

(6) When masonry joints are connected, the surface of the joint must be cleaned, watered and moistened, and mortar should be filled to keep the mortar joints straight.

(7) When repairing the wall, the corrosion of the tie bars should be checked. If the corrosion is severe, the rust must be removed with a wire brush and other tools before the construction can be concealed.

(8) Make mortar test blocks according to the specifications and test them on schedule.

(9) The concealed acceptance record of the masonry should be made before plastering.

(3) Interior and exterior decoration projects

After entering the decoration stage, the interior and exterior wall painting sub-projects should be made as a model room or as required by the design and construction unit before construction. Large-scale construction will be carried out after acceptance and approval by the owner, supervisor, design and other units. Various types of work are interspersed with construction, and the construction sequence adopts the method of first lowering then upper, and cross-working inside and outside at the same time.

1. Painting of interior and exterior walls

(1) The wall should be watered before plastering. The base layer of the wall is generally watered twice. The depth of water seepage on the brick surface is about 8-10mm. , that is, the plastering requirements are met.

(2) The mortar used for plastering must have good workability and a certain bonding strength.

The consistency of plastering mortar is generally controlled as follows:

The bottom layer of plastering sand-slurry is 100-120mm

The surface layer of plastering mortar is 100mm

(3) The raw materials used for plastering and the mortar used should meet the quality requirements. The cement mortar and mixed mortar used for plastering should be used within 3 hours and 4 hours respectively after mixing, and should be mixed and used as much as possible.

(4) When the local verticality and flatness errors are large, the thickened parts of the plaster layer should be smoothed in stages. Generally, the thickness of each plaster should be controlled at 8-10mm.

(7) Scaffolding engineering and surrounding safety protection

Mobile temporary scaffolding is used for internal and external scaffolding.

V. Safe and civilized construction management measures

1. Safety construction management system

(1) Develop a project safety management system and conduct self-safety assessments At the same time, it also needs to be assessed by the relevant departments of our unit.

(2) Establish a project safety management network headed by project managers, and implement dedicated personnel to be responsible for safety management.

2. Safety construction management measures

(1) Strengthen safety education, enhance safety awareness, and cooperate with safety management personnel at all levels. Safety objectives are broken down layer by layer and implemented to the team, so that whoever performs the work is responsible for safety and strictly implement the safety operating procedures and enterprise production management systems promulgated by superiors.

(2) The construction site shall be fully enclosed for construction in accordance with relevant city regulations, and designated personnel shall be arranged for management. Non-construction personnel are strictly prohibited from entering the construction site.

(3) Head protection sheds should be installed at the construction passages for construction workers and residents to enter and exit, and they should be safe and secure.

(4) All machinery on the construction site must implement a one-machine-one-gate system.

(5) All types of work operations must be carried out in strict accordance with the safe operating procedures and safety technical briefings of this project.

(6) Put an end to random throwing of objects, and do not allow interchange of work between types of work.

(7) Set up full-time safety and security personnel to conduct all-round supervision and management.

(8) Anyone entering the construction site must wear a safety helmet, and those working at heights must wear safety belts.

(9) Safety responsibilities should be assigned to individuals, a tagging system should be implemented, and eye-catching safety propaganda slogans should be placed on site.

(10) The company shall take the lead and assign a dedicated person to specify the rules for going out and the rules for carrying materials and tools in and out. During the decoration and installation stage, it is necessary to organize a finished product protection team and assign dedicated personnel to guard the products in different layers and rooms.

During the construction period, the foreman of the project department will organize night duty patrols every night to eliminate all sabotage and bad phenomena, and keep in constant contact with the local police station and neighborhood committees to ensure that the project is constructed normally in a safe, civilized and benign state.

(11) Workers in special types of work must undergo professional training. After passing the examination, they will be issued an operation certificate and required to hold the certificate to work.

(12) Conduct safety education for new workers and workers who change types of work to familiarize them with the operating procedures of their type of work. Safety activities will be conducted as a team unit every Monday, with specific instructions. Records, safety self-inspection before and after work, and timely resolution of problems found.

(13) The use of open flames is prohibited at the construction site, and flammable and explosive materials must be safely stacked and personnel must be assigned to take care of them.

(14) Establish a safety construction responsibility guarantee system for construction projects.

3. Civilized construction management system

(1) Develop an internal management system for the project, conduct assessments through relevant departments of our unit, and link it to the salaries of project department managers.

(2) Establish a project management network headed by project managers, and implement dedicated personnel to take charge of management work.

4. Civilized construction management measures

(1) Abide by rules and disciplines, and illegal command, illegal operations, and brutal construction are strictly prohibited. Safety helmets are distributed uniformly at the construction site and are color matched according to regulations to facilitate management and related inspections.

(2) On-site standardization, strict on-site material management, classification according to regulations, neat stacking according to specifications, materials entering the site for unloading, transportation or lifting, and stacking in a timely manner.

(3) Construction shall be carried out in strict accordance with specifications and design requirements to ensure construction quality and safety and to prevent barbaric construction. Construction work sections must be cleaned every day to keep them clean.

(4) Strengthen the protection of finished products, semi-finished products, products and materials, and assign dedicated personnel to take care of them.

(5) The layout of water and electricity lines at the construction site shall be arranged in accordance with specifications and standards and civilized construction site requirements, and shall not be arbitrarily pulled, connected or damaged at will.

(6) The guard room implements a 24-hour patrol system and is responsible for the security of the construction site.

(7) Outsiders and materials entering and exiting the site must be verified by the guard before they are allowed to pass. They are not allowed to enter the construction site without wearing a safety helmet.

(8) During the construction period, ensure that the surrounding environment and roads are clean, garbage should be cleaned up in time, and vehicles with sludge should be cleaned before going out.

(9) Arrange fire-fighting facilities in accordance with regulations, regularly check whether fire-fighting facilities are ineffective, conduct fire control on the construction site, and emphasize the safety of electricity and machinery.

(10) Strengthen contact with the local police station, 110 department, water and electricity department and dormitory area management department, in order to obtain their strong support and cooperation to facilitate the construction so that it can be completed with high quality, speed and civility The construction tasks of this project satisfy the construction unit.

(11) Carry out professional ethics construction, improve the quality of the workforce, and establish a good corporate image.

(12) Responsibilities for site management shall be assigned, personnel shall be implemented, and lists shall be published.

(13) Strengthen the legal concept education of employees within the company, make our due contribution to maintaining a stable environment, and truly achieve high-speed and high-quality projects, civilized construction sites, cleanliness, and comprehensive management that meet standards.

6. Quality Assurance System and Technical Measures

(1) Project Quality Objectives

Ensure that the project quality is excellent once and put into operation up to standard.

(2) Establish and improve the quality assurance system

Establish and improve the quality assurance system, rationally organize the quality management functions and activities of all departments and links of the enterprise, and form an effective Clarify the tasks, responsibilities, and authorities as an organic whole that coordinates with each other and promotes each other to ensure that the project is completed on target.

The quality assurance system network is as follows:

Quality assurance system network

1. Based on the quality purpose of our unit as the outline, and the relevant national technical quality specifications and procedures As a guide, on the premise of clarifying the quality responsibilities of managers at all levels within the project department, quality management can be carried out correctly and reasonably.

2. Establish a project quality management committee headed by the project manager and composed of personnel from various functional departments directly related to project quality management in the project department to implement unified leadership over project quality and ensure the quality of construction. Make decisions on technical measures and other issues.

3. The project department has one full-time quality inspector, and each professional team has 1-2 part-time quality inspectors to form the project department’s quality supervision agency. Each quality inspector conducts follow-up inspections on site, promptly urges relevant personnel to correct any problems found, or immediately reports major problems to the technical director. At the same time, quality inspectors are granted special "six powers" - supervision and inspection rights, quality veto rights, and assessment and evaluation. rights, commendation and reward rights, punishment rights and the right to report beyond the level.

4. Implement the principle of "whoever is in charge of production, who is in charge of quality; whoever is constructing, who is responsible for quality; whoever is operating, who is responsible for ensuring quality", implement the project quality job responsibility system, and decompose and implement it at all levels, and sign The project quality target responsibility statement uses economic means to assist the implementation of the project quality job responsibility system.

5. In accordance with the "Construction Acceptance Specifications for Building and Installation Projects", regularly carry out internal quality inspection activities and use the inspection results as the basis for formulating corrective and preventive measures.

(3) Technical measures

1. Carefully study and implement relevant national construction specifications and standards, construct in strict accordance with the requirements of construction drawings and construction organization design, and actively promote new The application of technology, new processes, new equipment and new materials.

2. There is one technical person in charge of this project, who is fully responsible for all comprehensive technical management of the project. It is equipped with technicians, quality inspectors, work foremen, etc., and one tester. Technicians, work foremen, quality inspectors, testers, etc. are all led and supervised by the technical person in charge.

3. Develop supporting technical management systems and technical responsibility systems for each position, and strictly abide by them.

4. Before formal construction, relevant technical personnel carefully study the construction drawings and do a good job of joint review of the drawings.

5. During the construction process, defects in the design drawings were discovered