After foundation treatment, accurately set out the axis with theodolite, determine the plane size of foundation, support the foundation template, and pour the cushion concrete after the axis and elevation are checked correctly. Pay attention to the setting of transverse slope and settlement joint during foundation construction. And then curing and demoulding. After reaching a certain strength, install the culvert with a crane. The installed culvert pipe has a smooth inner diameter, and the pipe body should be in close contact with the foundation pipe base, so that the stress on the pipe is uniform. The pipe joint is not more than 1 cm, and it shall be filled with asphalt plug. The joint settlement joint is consistent with the foundation settlement joint, and asphalt hemp should be filled. 20 # concrete girth joint shall be adopted for the external joint of the pipeline, and it shall be well maintained.
When the strength of foundation concrete reaches 80%, support the end wall formwork and pour concrete. When pouring concrete, attention should be paid to the firm support of formwork and beautiful line shape. When the concrete strength of the end wall reaches 70%, lime soil shall be compacted and backfilled in layers. Then do cone slope soil, build by laying bricks or stones flaky, and finally repair and submit.
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