What measures should be taken in rainy season construction of highway engineering?

The rainy season construction measures are aimed at the climate characteristics of Dingxi City, and the rainfall is small. There are no special requirements here, and materials can be prepared according to the usual rainy season construction. 1, do a good job in the field drainage system, and timely discharge the rainwater on the ground and in the field into the scheduled drainage outlet. Around the tower crane foundation, drainage ditches are set on both sides of roads and around buildings to ensure smooth water flow and no sinking, sliding and water accumulation after rain. Water retaining facilities should be set at the entrance of the passage, window opening and stairwell. 2. All mechanical shed towers should be set tightly to prevent rain leakage, and mechanical and electrical equipment should have rain and flood control measures. Installation of grounding safety device, switch box rain, no leakage, sensitive and effective grounding protection device, all kinds of wires to prevent water leakage. 3, in the ditch, pit, ditch and other parts below the ground set drainage ditches and collecting wells, ready to take out water in time, the drainage ditches and collecting wells for concrete hardening treatment, to ensure that the site is clean and tidy. 4, completes the lightning protection facilities. Tower cranes and elevators should be equipped with lightning protection devices, and the grounding system should be carefully checked. 5, during the storm, focus on safety inspection, to prevent the scaffold connection is not firm, slip, etc. 6. During construction in rainy season, the following matters should be paid attention to in terms of engineering quality: ① The masonry should not be too wet to prevent the wall from slipping, and the verticality and elevation of the masonry should be checked. (2) When pouring concrete, you need to know the weather forecast for 2-3 days first, and try to avoid heavy rain. When pouring concrete meets rain, immediately set up a fortification canopy and cover the poured concrete with waterproof material. (3) Stop external decoration construction in case of heavy rain, and take protective covering measures for finished products, and repair finished products and semi-finished products in time after rain. (4) Measure the water content of sand and gravel in time, grasp its range of change, and adjust the mixture ratio in time. ⑤ Strengthen the coverage of raw materials and moisture-proof measures, especially to prevent cement from being affected with damp, and strengthen the storage of steel to prevent corrosion. Semi-finished steel bars shall be placed on the cushion body of 20cm to avoid soaking and mud sticking. ⑥ Backfill the foundation pit in time to reduce the exposure time of foundation pit. ⑦ During construction in rainy season, the following points should be paid attention to in safety: A, strengthen safety education, do a good job in flood control, lightning protection, electric shock prevention, fire prevention, rainstorm prevention, anti-skid and heatstroke prevention, and implement them to the team through disclosure. B, when it rains heavily, stop all lifting operations. Tower crane is used for lightning protection and grounding. At the end of the work, the tower crane should clamp the tongs and hang the hook. C, often check the construction electricity, switch box, mechanical and electrical equipment should have perfect protection to zero, reliable rain and moisture-proof measures. Good insulation, prevent leakage, set up leakage protector, hand-held power tools, and wear personal safety protection articles. D, try to improve the working environment, adjust the operation time, and set up part-time medical emergency personnel at the construction site to deal with emergencies.