1. Tunnel project, the main inspection items are ***3 categories and 9 items.
1. Inspection items Category 1: Insufficient tunnel primary support, lining thickness and concrete strength. Inspection items Category 1, Item 1: Insufficient initial support thickness. Supervision control measures (key points): Check the technical briefing and the presence of on-site technical management personnel; check whether the cross-sectional dimensions are measured before initial support construction; check whether the steel frame is factory-made and whether it passes the inspection and trial assembly. Use; the steel frame should be erected in time, the steel frame model, quantity, spacing (±10cm), arch foot pads, connection method, verticality, locking anchor or anchor pipe position and direction angle are correct, and the initial spray concrete thickness is ≥4cm When installing a steel frame, the surface covering thickness should be ≥3cm; the initial support must be implemented in time immediately following the excavation; the thickness of the arch should be ≤6cm and the side wall should be ≤10cm in one injection of shotcrete; the specifications of the steel bars used in the steel mesh should be correct and the spacing deviation should not exceed ±10mm, whether the overlap length (1 to 2 meshes, deviation ≤±50mm) meets the requirements; after the initial support is completed, the thickness should be inspected in a timely manner; during the construction of the initial support, the supervisor should stand by to supervise. Inspection items Category 1, Item 2: Insufficient strength of primary support concrete. Supervision control measures (key points): Check whether the raw materials and mix ratio meet the design requirements; whether the sprayed concrete adopts wet spraying process, the thickness of the arch is ≤6cm, the side wall is ≤10cm, and the wet curing is not less than 14d after 2h of final setting. Inspection items Category 1, Item 3: Insufficient lining thickness, including hollowing of the vault. Supervision control measures (key points): Before lining construction, whether the clearance size is tested and whether it meets the requirements; whether the second lining trolley is inspected and tested before use; whether the molded grouting process is adopted for the vault; whether the process measures are in place. Inspection items Category 1, Item 4: Insufficient strength of lining concrete. Supervision control measures (key points): First, check whether the on-site technical, testing personnel and management personnel are in place; secondly, check whether the raw materials and mix proportions meet the regulations; then check whether the quality assurance measures for concrete construction are in place; and finally, check whether the strength of the lining concrete is tested and Specify whether the requirements are met; when the lining concrete is poured, the supervisor should stand by to supervise. 2. Inspection item Category 2: The tunnel is not excavated according to the prescribed methods and safe steps. Inspection item Category 2, Item 1: The tunnel is not excavated according to the prescribed method. Supervision control measures (key points): Check whether the excavation method meets the design requirements; changes in geological conditions require changes in the excavation method, and the design should be changed according to the procedures before implementation. Inspection item Category 2, Item 2: The safety step distance of tunnels with complex and weak surrounding rock exceeds the standard. Supervision control measures (key points): The excavation footage must be controlled according to the surrounding rock conditions; the construction step distance should meet the requirements (the distance between the closed position of the surrounding rock above level IV for initial support shall not be greater than 35m from the tunnel face; the surrounding rock for level I and II shall not be greater than 35m from the tunnel face; More than 200m, the surrounding rock of grade III shall not exceed 120m, the surrounding rock of grade IV shall not exceed 90m, and the surrounding rock of grade V and VI shall not exceed 70m). 3． Inspection item category 3: Tunnel construction does not carry out surrounding rock monitoring and measurement and advanced geological forecasting in accordance with regulations, and tunnels where toxic and harmful gases escape do not carry out monitoring according to special plans. Inspection items Category 3, Item 1: Tunnel construction did not carry out surrounding rock monitoring and measurement in accordance with regulations. Supervision and control measures (key points): The distance between monitoring and measurement points should be set (level IV surrounding rock should not be greater than 10m, and level V surrounding rock should not be greater than 5m), and the frequency of measurement should meet the requirements; Monitoring points must be set up on the surface and monitored. Inspection item Category 3, Item 2: Tunnel construction does not carry out advance geological forecast according to regulations. Supervision control measures (key points): Check whether the construction unit has prepared an implementation outline for advanced geological forecasting, which will be implemented by professionals after review and approval according to procedures; timely adjust advanced geological forecasting methods according to different geological conditions of surrounding rocks. Inspection items Category 3, Item 3: Tunnels where toxic and harmful gases escape are not monitored according to special plans. Supervision control measures (key points): Check whether the on-site technical personnel and management personnel are in place; check whether the tunnels where toxic and harmful gases escape are safe and technical; check whether the detection and monitoring equipment of the tunnels where toxic and harmful gases escape are set up; the frequency of detection and monitoring Or whether the method meets the requirements. 2. For roadbed and protection projects, the main inspection items are *** Category 1 and 3 items. Inspection items Category 1, Item 1: The subgrade filler does not meet the design requirements. Supervision control measures (key points): Check whether the subgrade filler is used without inspection; whether unqualified filler is used. Inspection items Category 1, Item 2: CFG piles and other foundation treatment tests failed.
Supervision control measures (key points): Check whether the on-site technical personnel and management personnel are in place; check whether the on-site operation process is in place; check whether the foundation treatment parameters and bearing capacity meet the design requirements; supervisors should stand by during the CFG pile construction process. Inspection items Category 1, Item 3: The slope protection prestressed anchor cables are not constructed in accordance with the design requirements. Supervision control measures (key points): Check whether on-site technical personnel and management personnel are in place; whether the variety, specifications, and quality of the application meet the design requirements; whether the pull-out test meets the design requirements. 3. For bridge projects, the main inspection items are *** Category 2 and 4 items. 1. Inspection item Category 1: The bridge pile foundation has insufficient length of Class III and IV piles and steel cages. Inspection items Category 1, Item 1: Type III and IV piles appear in bridge pile foundations. Supervision control measures (key points): Check whether the on-site technical personnel and management personnel are in place; check whether technical briefings are made; check whether the raw materials and mix proportions meet the design; check whether the construction technology meets the requirements; take timely measures once Class III and IV piles are discovered ( Issue supervision instructions) and report to the supervision station in a timely manner. Inspection item Category 1, Item 2: Insufficient length of steel cage. Supervision control measures (key points): Check whether on-site technical personnel and management personnel are in place; urge construction units to strictly implement the "three inspection system" for process inspection and acceptance; strengthen process inspection and acceptance, key processes and key process hidden engineering side station supervision; The next process is not allowed until the issue of insufficient cage length is resolved. 2. Inspection item Category 2: The construction of cast-in-place beam full hall supports and continuous beam hanging baskets does not carry out special design and is not constructed according to the design requirements. Inspection items Category 2, Item 1: No special design will be required for the construction of cast-in-place beam full hall supports and continuous beam hanging baskets. Supervision control measures (key points): Check whether on-site technical personnel and management personnel are in place; strengthen the number of patrols and process inspection and acceptance; once safety and quality hazards are discovered (no special design has been carried out), promptly take measures (issue supervision instructions) and report in a timely manner Supervision station. Inspection items Category 2, Item 2: Construction not in accordance with design requirements. Supervision control measures (key points): Strengthen inspection frequency and strengthen process inspection and acceptance; once safety and quality hazards are discovered (construction is not carried out according to design requirements), timely measures are taken (issuance of supervision instructions) and reported to the supervision station in a timely manner. 4. For housing construction projects, the main inspection items are *** Category 1 and 4 items. Inspection items Category 1, Item 1: Type III and IV piles appear on the pile foundation. Supervision control measures (key points): Check whether the on-site technical personnel and management personnel are in place; check whether technical briefings are made; check whether the raw materials and mix proportions meet the design; check whether the construction technology meets the requirements; take timely measures once Class III and IV piles are discovered ( Issue supervision instructions) and report to the supervision station in a timely manner. Inspection item Category 1, Item 2: Insufficient length of steel cage. Supervision control measures (key points): Check whether on-site technical personnel and management personnel are in place; urge construction units to strictly implement the "three inspection system" for process inspection and acceptance; strengthen process inspection and acceptance, key processes and key process hidden engineering side station supervision. Inspection item Category 1, Item 3: The steel structure components of the station building are unqualified. Supervision control measures (key points): Strengthen the inspection of incoming components and accessories. Once components that do not meet the design requirements are found, clear the site in a timely manner. Inspection items Category 1, Item 4: Use of unqualified cables. Supervision control measures (key points): Strengthen the inspection of incoming cables and use cables from manufacturers approved by the Railway Corporation. Once it is discovered that the Railway Corporation has ordered to prohibit the use of branded cables or cables that do not meet the design requirements, the site should be cleared in a timely manner. At the same time, the number of on-site inspections will be strengthened. 5. For the fourth electrical engineering project, the main inspection items are *** Category 1 and 2 items. Inspection items Category 1, Item 1: Type III and IV piles appear on the pile foundation. Supervision control measures (key points): Check whether the on-site technical personnel and management personnel are in place; check whether technical briefings are made; check whether the raw materials and mix proportions meet the design; check whether the construction technology meets the requirements; take timely measures once Class III and IV piles are discovered ( Issue supervision instructions) and report to the supervision station in a timely manner. Inspection items Category 1, Item 2: Use of unqualified cables. Supervision control measures (key points): Strengthen the inspection of incoming cables and use cables from manufacturers approved by the Railway Corporation. Once it is discovered that the Railway Corporation has ordered to prohibit the use of branded cables or cables that do not meet the design requirements, the site should be cleared in a timely manner. At the same time, the number of on-site inspections will be strengthened. 6. Construction monitoring, main inspection items *** Category 1 and 2 items. Inspection items Category 1, Item 1: Supervisors fail to stand by or sign at will on site.
Supervision control measures (key points): Supervision stations should strengthen supervision personnel to study the "Red Line Management" document of the Railway Corporation, and conduct side-station supervision in strict accordance with the side-station supervision parts required by railway supervision regulations; video collection of hidden projects, and entry into the lower lane without acceptance is not allowed During the construction process, at the same time, inspections will be strengthened. Once it is found that the supervisors are not standing by or sign at will on site, the supervision station will deal with it seriously. Inspection item Category 1, Item 2: Third-party inspection data is false. Supervision control measures (key points): When conducting third-party inspections, supervision takes the form of standing by during the entire process and recording key data (readings). 7. Construction behavior, the main inspection items are ***3 categories and 11 items. 1. Inspection items Category 1: Cutting corners and shoddy goods. Inspection items Category 1, Item 1: The tunnel is over-excavated and is not handled in accordance with the design requirements, and is intentionally blocked to form a cavity. Supervision control measures (key points): Check whether on-site technical personnel and management personnel are in place; urge construction units to strictly implement the "three inspection system" for process inspection and acceptance; strengthen process inspection and acceptance, carry out on-site supervision of key processes and hidden projects of key processes. Inspection items Category 1, Item 2: The number, length, grouting, etc. of tunnel initial support, advanced support, etc. do not meet the design requirements. Supervision control measures (key points): Check whether on-site technical personnel and management personnel are in place; urge construction units to strictly implement the "three inspection system" for process inspection and acceptance; strengthen process inspection and acceptance, concealment of key processes and key processes, and bypass initial construction work Station supervision. Inspection items Category 1, Item 3: Use of components and raw materials that are unqualified or fail to meet design requirements. Supervision control measures (key points): Strengthen the inspection of incoming components and accessories. Once components that do not meet the design requirements are found, clear the site in a timely manner. At the same time, the number of on-site inspections will be strengthened. Inspection items Category 1, Item 4: Low-grade bolts replace designed high-grade bolts; geogrid does not match the actual material, and foam board replaces insulation board. Supervision control measures (key points): Strengthen the inspection of incoming materials, equipment and components. Once any items are found to be inconsistent with the design requirements, clear the site in a timely manner. At the same time, the number of on-site inspections will be strengthened. 2. Inspection item category 2: subcontracting and illegal subcontracting. Inspection items Category 2, Item 1: The construction unit falls under any of the circumstances stipulated in Article 9 of these detailed rules. Supervision control measures (key points): Strengthen contract management, take timely measures once discovered, and report to the construction unit at the same time. Inspection items Category 2, Item 2: A third-party testing unit transfers its contracted inspection tasks to other testing units or individuals through cooperation, joint ventures, individual contracting forms or names, directly or in disguised form, to other testing units or individuals for implementation. Three-party testing. Supervision control measures (key points): Strengthen contract management, take timely measures once discovered, and report to the construction unit at the same time. 3. Inspection item category 3: falsification of internal information. Inspection items Category 3, Item 1: Install filtering software and manually modify concrete mixing station data. Supervision and control measures (key points): Supervise strictly according to the management system of the concrete mixing station, strengthen inspections, take timely measures to deal with serious problems once discovered, and report to the construction unit at the same time. Inspection item Category 3, Item 2: The settlement observation data is inconsistent with the actual situation. Supervision control measures (key points): Strengthen on-site supervision, strictly collect settlement observation data, and arrange side station supervision in a timely manner. Inspection items Category 3, Item 3: Roadbed, bridge foundation, tunnel grouting or karst geological treatment are inconsistent with the construction drawings. Supervision control measures (key points): Strictly implement the regulations on grouting management, strengthen process inspection and acceptance, and strengthen inspections. Inspection items Category 3, Item 4: The soft foundation treatment of roadbed, bridges or culverts, and tunnels does not conform to the construction drawings. Supervision control measures (key points): Check whether on-site technical personnel and management personnel are in place, strictly implement the construction unit's construction according to the design plan or construction drawings, strengthen process inspection and acceptance, and strengthen inspections. Inspection item Category 3, Item 5: A false report was issued for strength inspection of concrete test blocks. Supervision control measures (key points): Strengthen the supervision of on-site supervision and witness the supervision of concrete test block strength testing tests in accordance with regulations.
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