Quality control method of pumped storage power station project?

First, the current problems in project quality management

1. The progress of the project is not in line with the plan. Although a unified technical standard has been formulated, the progress of the project will lag behind due to climate, geological conditions, land acquisition by immigrants and other reasons.

2. The quality of personnel is uneven. Construction, design, construction, supervision, project company personnel's quality awareness, legal awareness, system execution, etc. Uneven, it is difficult to unify project quality planning, target management, construction organization and technical guidance.

3. Quality of equipment and materials. Due to the lack of refined management, there are many types and quantities of equipment and materials needed for construction, so it is difficult to make a comprehensive inspection. However, sampling inspection often leads to omissions.

Second, the project quality control

1. Project schedule control

The construction management project department mainly adopts comprehensive measures such as "active control, dynamic control", "pre-prediction", "post-analysis", "overall control" and "hierarchical control" to control the progress of the project, focusing on analyzing the key routes, grasping the key work on the key routes, and analyzing, adjusting and arranging the deviations in time to ensure that the image progress of the project meets the requirements of the overall controllable progress of the project. The main concrete measures for project schedule control are as follows:

According to the contract requirements, the owner shall organize the preparation of the project milestone plan.

1.2 according to the milestone plan approved by the owner, organize the preparation of the project-level network schedule.

1.3 Make annual, quarterly, monthly and weekly plans according to the requirements of construction control progress.

1.4 do a good job in plan tracking and resource inspection, urge the supervisor to supervise, inspect and record the implementation of the schedule and related resource allocation on a daily basis, and at the same time do a good job in analyzing, inspecting and recording the influence of external factors such as resettlement, design drawings and construction natural environment; If it is found that the progress is lagging behind, all kinds of factors affecting the progress of the project will be analyzed in time, and the main factors will be found and eliminated in time.

1.5 Assist the contractor to establish an efficient construction organization and strengthen the construction organization management.

1.6 urge the contractor to plan the construction measures and realize the optimal allocation of production factors.

1.7 Strengthen contract management and implement the schedule with contract measures.

1.8 Improve the construction of engineering environment. The construction of water conservancy and hydropower projects is greatly influenced by the construction environment. Such as meteorology, hydrology, geology, soil and water conservation and environmental protection, land acquisition and demolition, local social environment, etc. Therefore, in the process of management, we should pay close attention to the changes of environmental conditions, do a good job in all aspects of environmental construction of this project, and provide a good construction environment for the smooth progress of this project.

1.9 Hold regular project progress coordination meetings, such as weekly meetings and monthly meetings, make inventory and analysis on the completion of the project progress, and coordinate and solve the main problems affecting the project progress in time.

2. Quality control measures before construction

2. 1 Adhere to the examination and approval system for commencement, and do a good job in reviewing the commencement conditions of the project. The application system for commencement is an important means to pre-control the project quality on the construction site, and the contractor must be required to seriously implement the application procedure for commencement. The contractor shall, according to the requirements of the construction contract, actively organize people, materials and machines to enter the site, and on the basis of fully understanding the construction drawings and contract documents, complete the construction organization design of the unit project, the controlled construction progress plan, the resources that should be invested to achieve the contract objectives and the layout of the construction control network, etc.

2.2 to do a good job of construction drawing release. Construction drawing is one of the important bases for project management and construction, and it is also a necessary condition for the project to start. Doing a good job in quality control of construction drawing release is one of the prerequisites for doing a good job in project quality pre-control, and it is also in response to the requirements of bidding documents for construction management. The release of construction drawings mainly includes the following contents: drawing supply plan, joint review of drawings, release of construction drawings, etc. After receiving the construction drawings provided by the owner's relevant departments according to the construction drawing supply plan, the construction management project department will distribute them to the supervisor in time, and urge the supervisor to organize its internal related professionals to carry out internal joint review, organize the design for technical disclosure of the construction drawings, report them to the chief supervision engineer for confirmation, and issue them to the contractor for implementation after being approved by the construction management project department; Problems arising from the review shall be submitted by the supervision department in written form or other forms specified by the owner to the construction management project department, which will feed back to the designer. In the process of construction, if there is any drawing problem, the contractor shall notify the supervision department in time, and the supervision department will feed it back to the designer for solution according to the above procedures.

2.3 Do a good job in measurement quality control. Within a reasonable time before commencement, the construction management project department shall organize to provide the contractor with the benchmark, datum line and benchmark elevation of the site in written form. With the participation of the construction management project department and the supervision engineer, the owner and the designer will hand over the pile to the contractor at the scene, and the contractor will carry out the retest, and report the retest data to the supervisor for review according to the number of copies required by the contract, and then the supervisor will report it to the construction management project department. If the contractor is in doubt about any data, he shall submit a list to the supervision engineer, listing the data that are considered to be wrong and the data that have been retested. Before the supervision engineer answers the above questions, the construction of these related parts should be suspended and the reference points provided by the supervision engineer should be properly protected. After receiving the written list of problems, the supervision engineer shall communicate with the construction management project department in time, clarify them one by one, or contact the design to solve them. The contractor shall, according to the plane and elevation control data provided by the construction management project department and the elevation, position and size of each part in the design drawings, conduct on-site measurement and calculation before each project starts to ensure its accuracy.

2.4 Do a good job in quality control of raw materials. The procurement plan of important raw materials, components and equipment shall meet the contract requirements. If there is any change, it should go through the supervision and construction management project department, and there is a written approval document from the designer. The above-mentioned materials, components and equipment should be purchased from qualified suppliers, and each batch of products should have a product certificate that meets national standards. Parts and equipment shall also provide quality assurance and written commitment during the warranty period of installation, commissioning and use. After all kinds of raw materials and components enter the site, the supervisor shall be notified to participate in the acceptance, and the acceptance of the equipment entering the site shall be notified to the supervisor 24 hours in advance. All raw materials, components and equipment can be used in the permanent project only after being accepted by the supervision engineer. The acceptance results must be saved for the construction management project department to check at any time. For important raw materials (such as steel, cement, additives, waterproof materials, etc. ), the contractor shall also carry out batch sampling test according to relevant regulations, and the number of sampling groups shall meet the specified requirements. For the project that must witness sampling, the supervision engineer shall be notified in advance to participate in witness sampling. The sampling test results must be kept in case the construction management project department checks at any time. The transportation, storage and use of raw materials, spare parts and equipment shall comply with relevant regulations; The storage and custody shall be reported at the monthly meeting, and the materials with storage time limit requirements (such as cement) shall be reviewed regularly, and the results shall be reported to the supervisor. The contractor shall conduct tests according to the inspection frequency specified in the specification to ensure that all materials used in the project are qualified. When the supervision engineer requires sampling inspection, the contractor shall conduct sampling inspection at any time. The sampling results must be saved for the construction management project department to check at any time.

2.5 Adhere to the approval procedures for the use of engineering materials. All kinds of raw materials should be submitted to the supervision department 14 days or earlier before use; The application report for raw materials and samples can only be used for the permanent project after being approved by the supervisor. Substitute materials, components and equipment must be reported to the supervisor, construction management project department and design unit for written approval before they can be used; The materials and equipment (including specifications, quantity and price) that need to be submitted for approval before the purchase stipulated in the contract shall be submitted before the specified time, and then the purchase shall be carried out after the approval; The supervisor will not accept and measure the quantity of raw materials, components and equipment used without the prior approval of the supervisor, and require the contractor to dismantle the completed project when necessary; If the raw materials approved by the supervisor are found to be different from the design requirements in production process, proportion, variety, specification, validity period and use function, etc. , the contractor shall re-apply for examination and approval, the original examination and approval is invalid; The supervisor's approval of raw materials shall be regarded as the approval of the application report and samples. If the materials are found inconsistent with the approved materials during the project, the approval will be cancelled naturally, and the contractor shall transport the materials to the site.

2.6 Do a good job in project division, and set up important quality control points and hold points. Divide the composition of the project (unit project, division project, unit project, etc.). ), according to the construction procedure, define the quality control workflow, analyze and determine the key points of quality control and control measures to be taken, and urge the supervisor to formulate management systems such as implementation rules and regulations for quality control.

2.7 Check and review the scheme and measures before commencement. Require the supervision engineer to urge the contractor to establish and improve the quality assurance system, complete the construction of relevant personnel, equipment and laboratories, and complete the construction of relevant system documents and management systems according to the contract commitments and the actual needs of the project; Before construction, the supervision engineer should check them one by one as an important part of the construction condition review. After passing the examination, it shall be reported to the Construction Management Project Department for permission to start construction. Supervise the supervision engineer to conduct pre-control before each working procedure: review the construction organization design, construction technical measures, construction scheme, construction tools, materials and personnel. , and then ask the process to carry out the construction as planned.

2.8 Construction preparation stage supervision work program box.

3. Quality control in the construction process

3. 1 In order to ensure the operation quality, the construction must be carried out according to the approved scheme, qualified machines, tools, equipment and raw materials should be used, and reliable safety protection measures should be taken. The main operators must hold relevant certificates and be held by suitable personnel with the operation skills of this position.

3.2 The supervision engineer shall conduct process monitoring: the supervision engineer shall conduct spot check and sampling inspection at any time during the construction. The supervision engineer of important parts and key processes should strengthen monitoring and implement the system of "standing by".

3.3 If unqualified processes, operations, finished products and semi-finished products are found, the supervision engineer shall (orally or in writing) issue a rectification order or a project suspension order, and the contractor shall (orally or in writing) report the causes, results and harm degree of the unqualified products, and put forward plans or measures to correct the unqualified products. After examination and approval by the supervision engineer, rework or repair shall be carried out according to the treatment plan approved by the supervision engineer. The treatment plan shall be submitted to the construction management project department for the record. The supervision engineer shall supervise the rework or repair process to ensure that the quality after rework or repair meets the specified requirements.

3.4 Adhere to the "parallel detection" system. The supervision engineer shall, according to the sampling frequency stipulated in the contract and the supervision specification, conduct necessary sampling inspection on the working procedure, raw materials and semi-finished products, make statistical analysis, adhere to the principle of "data speaks for itself", and strive to convince people by reasoning. The sampling test results must be kept in case the construction management project department checks at any time.

3.5 Adhere to the process acceptance quality control procedures. Before the start of the follow-up process and after the end of the previous process, or after the end of the unit project, the contractor must go through the inspection procedures according to the specified "three inspections" level, and may not carry out the field operation of the next process or part without acceptance. The contractor shall implement the internal "three inspections" inspection system, that is, team self-inspection, construction team re-inspection and final inspection by the quality inspection department of the project department. The contractor shall apply to the supervision engineer for acceptance after passing the "three inspections"; If the "three inspections" are unqualified, the supervision engineer will not accept them. The construction management project department will participate in the acceptance at any time, or conduct re-inspection after the acceptance of the supervision engineer. If the supervision engineer's acceptance is unqualified, the next working procedure on site shall not be continued. If the first acceptance is unqualified, it shall be reworked, rectified and reinspected. If the second acceptance is unqualified, the supervision engineer shall issue a notice of unqualified works. The construction project manager should find out the reasons, investigate the dereliction of duty of the "three inspections", reorganize the "three inspections", write a written report when necessary, and then invite the construction project manager to inspect it personally after passing the inspection.

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