Research on project construction schedule management?

Strengthening project schedule management is the key to ensure the timely implementation of the project. As the legal person of the project, Xizang Autonomous Region Lola Water Control Project and Irrigation District Management Bureau (hereinafter referred to as the Laguan Bureau) is the first person in charge of the project schedule management, with the project management department as the core department and the Chief Engineer's Office and the Land Acquisition and Immigration Department as the coordination departments. The chief engineer's office's main responsibilities in schedule management are embodied in two aspects: one is to urge the design unit to provide construction drawings and site cooperation in time according to the needs of the project schedule, and the other is to take the lead in coordinating and handling disputes with villagers and public facilities departments caused by design changes. The main responsibilities of the Land Acquisition and Immigration Section are: First, to deal with the demands of villagers in the construction occupied area; The second is to deal with disputes caused by the intersection of construction lines and public facilities and go through the formalities for approval.

According to the distribution characteristics of the project, the project management division is divided into four management areas: hub project area, God grid area, Xiexiu area, Qumei area and Nie Rixiong area. Each area is equipped with a section chief with rich management experience, and each bid section under each area is equipped with field engineers, and the project department of the construction unit is set up. In order to control the progress of the project as a whole, a project progress management specialist was set up to make dynamic statistical analysis on the implementation of the investment progress every week, coordinate the internal and external environment of the project, put forward rectification opinions, and put forward rectification opinions for the construction unit and its supervision department with poor investment progress control. If the rectification effect is not good, a written warning will be issued and punishment will be imposed according to the terms of the contract.

Supervision institutions such as Jiangsu Kexing, Beijing Guanzhong, Zhongshui Northeast Survey and Design Institute, and Henan Mingzhu, which participated in the project construction, strengthened supervision and management, took progress control as the main line running through the project construction, took the approved overall construction schedule as the basis for controlling progress, found out key routes and phased control points, and ensured the construction unit to implement the approved schedule with good quality and quantity through standing by, inspection and parallel inspection. The construction units of hub engineering, power transmission and transformation, road engineering, etc. 10 and the construction units of irrigation districts represented by the armed police hydropower units 15 are the implementers of the schedule. According to the signed investment target responsibility letter and the construction organization design and general construction schedule approved by the supervisor, the Administration requires the construction unit to break down into months, weeks and days in detail, reasonably divide the construction flow operation sections, arrange the construction procedures according to the flow operation method, and implement the guarantee measures of "people, materials and materials". The following problems should be paid attention to in establishing and perfecting the implementation system of project schedule management.

First, control the construction period, key lines and milestone nodes of the project.

1. Controlling the construction period The Lola project is located in a cold and oxygen-deficient area, with the elevation of the dam crest of 4,305 m ... Natural conditions are one of the biggest difficulties in project implementation. On the one hand, the plateau climate threatens people's lives and health, and the work efficiency of front-line workers is more affected; On the other hand, the plateau climate also has a great influence on the working efficiency of construction machinery, and the efficiency reduction coefficient of construction machinery in plateau areas above 4200m reaches 1.65. The key control projects of this project are dam and Dro diversion tunnel. Considering the reduction of labor and mechanical efficiency in the above plateau areas, the total control period is set at 58 months. 2. The key line project of the roller project starts → spillway tunnel and diversion tunnel project → river closure project → Dro diversion tunnel project → Dro power station (the first unit has power generation conditions) → completion project. According to the control period of 58 months, the approved commencement date of the dam and the Dro diversion tunnel is 2065438+April 7, 2005, and the completion date of the roller project is February 7, 2020. 3. Milestone Node The most important milestone of the roller project is the river closure project from 2065438 to September 30, 2006, which has been successfully completed on schedule. 4. The contract time limit for each bid contract time limit for each bid contract, the factors and principles considered are the same as the control time limit for a project. In the irrigation project, the first time to control the construction period is the Nalong Tunnel Project of China Railway 19th Bureau, and the contract construction period is 57 months. Followed by the Beiqiong Tunnel Project of the Eighth Bureau of Zhongshui, 45 months; Other parts are all 24 months except 25 months in the words 1 and 2.

Second, the total construction schedule and investment schedule.

1. In addition to manual and mechanical factors, the material supply in this project area is also greatly limited in the preparation of the overall construction schedule. In particular, blasting equipment is affected by the stability factors in Tibet, the examination and approval procedures are extremely strict, the supply time is uncertain, and the supply is cut off for a long time. Moreover, during the construction period, the time nodes of major festivals and sensitive stages are strictly controlled, and the work is often stopped for a long time. In addition, the information network in this project area is extremely unstable, and some areas are even missing. After comprehensive consideration, it is considered that the network planning technology of this project is not mature, and it is decided to use the crossing chart schedule method to prepare the total construction schedule, and use the histogram image schedule and investment schedule curve to reflect the project implementation progress. The compilation basis of the general construction schedule is mainly in four aspects, one is the above-mentioned "control time limit and contract time limit", and the other three are "effective time limit", "commencement date" and "annual investment task". Effective construction period:1The lowest temperature in the area where the roller project is located is -2℃ ~-7℃ in late October,-1/kloc-0 ~-17℃ in March, and the lowest temperature rises from -4℃ to above 0℃ in April. Therefore, the effective construction period is from April 7th to1October 27th 10 (6 months and 20 days) every year. 101During the period from October 28th to April 6th, earthwork excavation and backfilling, steel pipe fabrication and installation can be carried out on days when the freezing is not deep; Tunnel excavation and shotcrete protection requirements should be carried out as usual; Mechanical and electrical equipment can also be installed on 20 17 and later. Effective time limit for a project is the main basis for compiling the general construction schedule. Commencement date: The dam and Dro diversion tunnel project of the main project of Lola, which is the responsibility of the Armed Police Hydropower Unit, started on April 7th, 20th15th, and other projects started after June 8th. The main reason for the late start-up is that the preliminary planning and design can't keep up, and most of the contract sections of irrigation projects haven't even decided on the channel route, which has affected the start-up of other projects. Annual investment tasks: 20 15 annual investment plan 1500 million yuan, 20 16 annual investment plan 800 million yuan. 2. Preparation of investment schedule The investment schedule is to convert the items in the annual construction schedule into the output value on the quotation sheet of each group of bill of quantities in the construction contract on a monthly basis. The summary value of the annual investment progress plan should be consistent with the total amount on the signed investment target responsibility book. This repeated adjustment and calculation makes the whole construction progress more accurate.

Iii. Monitoring and management of project progress implementation

1. Monitoring and management of the implementation of the project progress plan by the supervision department (1) Weekly and monthly progress report data collection is one of the main ways to reflect the actual progress of the project, and all construction units shall fill it in according to the regulations. (2) The on-site project progress supervisor shall conduct regular on-site inspection and daily inspection on the implementation of the progress plan. (3) Weekly meeting, monthly meeting, supervision weekly meeting and monthly meeting. LADA Engineering Department, General Office, Land Requisition and Immigration Department often send people to attend the meeting, and design institutes and other related units also attend the meeting. Through face-to-face communication with the construction unit, understand the progress of the project and coordinate to solve the problems in the project. (4) Important Thematic Meetings For the progress of important milestone nodes, special meetings were held, such as the special meeting on river closure. Through careful deployment, the complete success of river closure was ensured.

2.LABORA (1) The supervision and management of the project progress by the daily supervision and inspection and regular work meetings of the Engineering Department. LABORA engineers enter the construction site to conduct spot checks on the implementation of the progress plan, urge the supervision engineers to perform their duties better, and more importantly, coordinate all aspects to solve the problems existing in the site; The district head conducts regular inspections to focus on solving difficult problems; The section chief of the project focuses on inspecting the bid sections with seriously lagging progress and solving the resource problems in all aspects. The Engineering Department regularly holds departmental working meetings to check the completion of annual and monthly management objectives and implement rectification measures. (2) Assessment and Reward and Punishment of Project Progress Management According to the Measures for the Management of Project Progress of Lola Water Control Project and Irrigation District issued by LAB, the Engineering Department organizes personnel to assess the project progress of the construction unit every month, and rewards and punishments will be given according to the assessment results. The assessment of the supervision company shall be conducted once every quarter, and the director in charge of the Administration Bureau shall take the lead in the assessment.

Fourth, do a good job of weekly investment progress report.

The investment progress plan is actually a quantitative version of the output value of the total construction progress plan. The investment progress weekly report further decomposes the monthly planned output value of the investment progress plan into weeks, and then compares it with the actual output value completed every week. Making a good investment schedule plan is beneficial to the dynamic management of project schedule. According to the statistical analysis results of Investment Progress Weekly, the Management Supervision Bureau issued a weekly bulletin to praise those who performed well and criticize those who performed poorly. For those who do not change their long-term education, an early warning notice will be issued and interviews will be held. If the rectification measures are still not taken or the rectification is ineffective, a formal written warning notice will be issued and punishment will be imposed according to the terms of the contract. In short, by strengthening the project schedule management, the project construction has been effectively promoted. In the next stage of schedule management, we will focus on three control projects: Dro diversion tunnel, Nalong tunnel and Beiqiong tunnel, and further strengthen management, so as to urge the construction unit to improve the technology and improve the on-site management level.

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