Dense construction method at the lower circular arc of the drainage pipe on the sandy soil base

Abstract

The invention discloses a compaction construction method of a lower arc position of a sandy soil basement drain pipe. The method includes the following steps of laying the drain pipe for a closed-water test; laying a drain pipeline on a pipe ditch central line, conducting a closed-water test on the drain pipeline, and conducting pipe ditch backfill work after the closed-water test is qualified; conducting layered backfill sand laying and cofferdam forming; mechanically or manually putting sandy soil to the two sides of a pipeline in a ditch, and manually spreading sandy soil to be uniform; building a cofferdam 300 mm wide and 300 mm high every 10 mm, and conducting water injecting; conducting water injecting work on the two sides of the drain pipe at the same time after a sandy layer is laid completely; conducting grinding through a spike grinder, and conducting sand compensating, wherein grinding is conducted through the spike grinder, the number of grinding times is not smaller than 8, and the lap joint width in the grinding process is not smaller than one third of the width of the grinder; grinding reserved holes and conducting manual filling and compacting after grinding is completed; detecting compactness and conducting acceptance; detecting sandy soil compactness after water completely permeates the sandy layer, and conducting backfill work of the next layer till the backfill standard height meets the design requirement after the design requirement is met.

Description

[0001] Technical field: [0002] The invention relates to the technical field of outdoor public drainpipe construction, in particular to a construction method for dense construction at the circular arc under a sandy soil base drainpipe. [0003] Background technique: [0004] In recent years, road subsidence accidents have occurred frequently due to continuous rain, causing a lot of economic and property losses and seriously affecting the smooth flow of roads. It has aroused widespread concern from society and construction units. Pipeline leakage is the main factor causing urban road pavement subsidence. The reason is that in the process of backfilling the pipe trench, the backfilling at the bottom of the pipe is not compact, resulting in uneven settlement of the foundation, which causes the pipe to rupture. After the underground drainage pipeline leaks, the water content of the subgrade will increase, the bearing capacity will decrease, and the road surface will collapse und...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a compact construction method at the circular arc under the drainage pipe on a sandy soil base, which is used to solve the problem that the backfill compactness at the circular arc under the drainage pipe is difficult to meet the design requirements, and completely solve the problem of road surface subsidence

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