Detailed rules for quality supervision of highway engineering?

What are the detailed rules for highway engineering quality supervision? The following Zhong Da consults the bidding teacher to answer your questions for your reference.

For more than two years, under the guidance of the owner, the director's office has conscientiously implemented the Measures for the Quality Management of Highway Engineering formulated by * * Highway. All supervision engineers take quality control as the core, strictly control intermediate links and quality standards, and earnestly stick to the sideline, so as to be "better a villain than a sinner" and be the patron saint of highway engineering quality.

(1) Carefully check the contractor's quality assurance system. In the process of quality control, the contractor's quality assurance system is strictly reviewed, and the "materials", "technology" and "inspection" are strictly controlled. According to the commitment in the tender documents, the Office of the Director-General urges the construction unit to enter the site for excavation, mixing, paving, rolling equipment, measuring instruments and test equipment. When the construction equipment and test instruments entering the site do not meet the contract commitments and construction requirements, the contractor shall be urged to supplement or replace them in time. Strengthen the quality inspection of contractors and site test institutions, carefully check the quality, quantity and test equipment of their personnel, and urge the project and site laboratory to complete the test instruments and personnel needed for construction. Quality inspection institutions at all levels have complete personnel, clear responsibilities and clear rewards and punishments, which ensure the normal operation of the self-inspection system. Every day, the director's office will convene the on-site supervision engineer and the person in charge of the construction unit in time to analyze and solve the quality problems found in the construction site. For the common problems that appear many times, the director's office will analyze the problems on the spot with the project manager, find out the reasons, study the solutions, and implement the responsibilities to people. Quality problems found by the owner and the director's office shall be handled by the project manager or chief engineer in conjunction with the director's office. The project department shall put forward rectification measures or treatment schemes, and the site supervisor shall supervise and urge the rectification inspection, strictly control all aspects of construction, eliminate quality hidden dangers and effectively control the construction quality.

(2) Distinguish the key points of supervision and do a good job in on-site supervision of key projects and key working procedures. According to the characteristics of the first and second contract sections of * * Highway, the Director's Office takes the filling and excavation joint, "three-back backfill", subgrade filler strength, upper pouring of cast-in-place box girder, beam slab prefabrication, prestressed tensioning, flaky concrete high retaining wall, culvert, cement stabilized base, cement concrete surface course and concrete mixing station as the key and difficult points of supervision and control. In this process, the control of the buried depth of high retaining wall foundation and the technical scheme of high slope protection were strengthened, and the supervisors were urged to adhere to it. Check the duty of quality inspection and testing personnel of contractors in time, strictly control raw materials and construction technology, handle the construction joints of cement stabilized layer and control the vibrating, grinding and curing process of concrete panels, and strengthen the control of cutting and carving of vertical and horizontal joints of panels. The general office has also continuously strengthened inspections, inspected and urged on-site supervisors to stick to their posts, earnestly performed their supervisory duties, and ensured the quality of key projects. Always adhere to the quality management principle of "being a villain rather than a sinner", firmly establish the quality consciousness of "responsibility is more important than Mount Tai", and realize that strict quality control is the responsibility of the owner and the care of the contractor. All supervisors can safely check the project quality and be the guardians of the project quality. Over the past two years, the Office of the Director-General has issued 2 1 supervision notice, 9 rectification notices, 30 supervision notices and 5 rectification notices for the second section of the contract, and fined1.20,000 yuan as quality liquidated damages. K0+300 ~+800 left wall backfill, K5+588 ~+603 rubble concrete foundation, K4+2 14 ~+240 rubble concrete foundation, K0+300 ~+500 cement stabilized base, 4# material with excessive silt content, K0+865438+ K 1 1+ 125 Bridge's 0# abutment rubble concrete side wall, K 16+544 Bridge 1- 1#, 1-2# pile foundation, K.

(3) Strictly follow the supervision procedures, pay attention to on-site quality management, and pay special attention to the construction quality of each working procedure. Requirements will process quality control as the focus of supervision work, adhere to the word "strict" pledge, strengthen process control, do on-site inspection, on-site visa, find problems in time, strictly on the working procedure is not checked or unqualified, the next working procedure is not constructed, to ensure that the construction quality of subdivisional work is qualified, so as to ensure the quality of division and unit projects. Actively do a good job in process inspection and intermediate handover acceptance to improve supervision efficiency.

(4) Strengthen communication and coordination with the project department. The effective implementation of supervision notices and instructions can not be separated from the understanding and cooperation of the project department. In addition to taking some compulsory measures in the contract, the director's office also actively strengthens communication and coordination with the project department, grasps the working ideas and construction arrangements of the project department in time, and also lets the project department know the ideas and measures taken by the director's office, obtains the understanding and cooperation of the director's office, and carries out the instructions of the director's office in time to avoid misunderstanding, which is beneficial.

⑤ Strengthen the testing work. The site laboratory of the director's office will strengthen the inspection of raw materials such as steel bars, steel strands, cement, macadam and additives, attach importance to the strength control of subgrade and subgrade filler, do a good job in the verification test of contractor's standard test, strictly control the process test, strengthen the daily sampling test of steel bar welding and bearing, sample subgrade compactness, mortar and concrete according to the specified frequency, provide true and accurate data, objectively evaluate the project, and find unqualified raw materials and semi-finished products in time to prevent use. The director's office will strictly test the pavement aggregate from the beginning of the material source, and arrange special personnel to control the material source, yard and mixing station to ensure that the raw materials are qualified. The laboratory of the director's office regularly and irregularly screens the coarse and fine aggregates in each yard and mixing station, and tests the crushing value and needle content. , and promptly notify the contractor to correct the problems found. Supervise the contractor to do a good job in the standard test of theoretical mix ratio and production mix ratio of graded macadam, cement stabilized base course and cement concrete surface course, and the director's office will conduct verification tests respectively. Through trial paving of test sections, repeated analysis and summary will be made to ensure that the production mix ratio, various process parameters, mechanical equipment combination, personnel organization, test detection and other data can really guide the construction. On the basis of the contractor's sampling test, not less than 30% of the independent sampling test shall be carried out, so as to make an objective evaluation of pavement engineering.

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