Suitable for the construction of prefabricated reinforced concrete retaining walls in highway and urban road engineering..

1. Provide technical training to workers, and those who have not passed the training are not allowed to work..

2. Prepare a construction plan for retaining walls based on the design drawings, which has been approved; And do a good job of safety technology disclosure..

3. The approval procedures for the construction report and material inspection of the retaining wall have been completed..

4. Complete the concrete mix proportion design and concrete trial mixing work..

(1) The retaining wall panel should have a production date, inspection qualified factory label, and corresponding steel reinforcement and concrete raw material testing and testing data..

(2) The quality of prefabricated retaining wall panels should comply with the following regulations:.

1) The raw materials and mix proportions of concrete should comply with the specifications, and the strength should meet the design requirements..

2) The exposed surface of the wall panel shall be smooth and consistent in color, without any honeycomb, exposed ribs, missing edges, or corners..

3) Wall panels with hard injuries or cracks are not allowed to be used (except for those identified by the design and relevant departments and measures taken)..

4) The allowable deviation for the quality of prefabricated concrete retaining wall panels should comply with the provisions of Table 1-43..

2. Cement: Ordinary Portland cement and Portland cement are generally used. Cement should have a product certificate and factory inspection report upon entry. After entering the site, samples should be taken and retested for strength, stability, and other necessary performance indicators. Its quality must comply with the current national standards such as Portland cement and ordinary Portland cement (GB 175)..

When there is doubt about the quality of cement or when the cement has been produced for more than 3 months, a retest must be conducted before use and used according to the retest results. Different types of cement shall not be mixed for use..

3. Sand: The variety and quality of sand should comply with the requirements of the current national standard “Technical Specification for Construction of Highway Bridges and Culverts” (JTJ 041), and after entering the site, sampling and testing should be carried out in accordance with the provisions of the current national standard “Test Specification for Aggregates in Highway Engineering” (JTJ 058) to pass the test..

4. Stones: Hard pebbles or crushed stones should be used, and inspection should be carried out in batches according to the current national standard “Test Specification for Aggregates in Highway Engineering” (JTJ 058) according to different conditions such as origin, category, processing method, and specifications. The quality should comply with the provisions of the current national standard “Technical Specification for Construction of Highway Bridges and Culverts” (JTJ 041)..

5. Water: It is recommended to use drinking water. When using other water sources, their water quality should comply with the current national standard for concrete mixing water (JGJ63)..

6. Reinforcement: Reinforcement should have a factory quality certificate and test report; The variety, grade, and specification of steel bars should meet the design requirements; When the steel bars enter the site, samples should be taken for mechanical performance testing, and their quality must comply with the current national standards such as “Hot rolled plain round steel bars for reinforced concrete” (GB13013), “Hot rolled ribbed steel bars for reinforced concrete” (GB 1499), and “Cold rolled ribbed steel bars” (GB 13788)..

Trapezoid Rubber Magnetic Chamfer

When brittle fracture, poor welding performance, or significantly abnormal mechanical properties are found in the steel bars, chemical analysis or other special inspections should be conducted on the batch of steel bars..

1. Machinery: excavator, crane, hopper, concrete tanker (pre mixed), concrete.