Construction method of sludge soil texture deep foundation pit excavation and pumping sand compacted backfilling

Abstract

A construction method of sludge soil texture deep foundation pit excavation and pumping sand compacted backfilling comprises the following steps: first, measuring and positioning are conducted; second, a small foundation pit is artificially excavated in the middle of a deep foundation pit to be excavated; third, a suspension type sewage pump used for draining slurry is placed in the small foundation pit; fourth, deep foundation pit excavation construction is carried out; fifth, after the deep foundation pit excavation construction is completed, a section chief assigns unified inspection and acceptance of the position, size and slope of the deep foundation pit to a quality inspector, a technician and a surveyor; sixth, pumping sand compacted backfilling construction is carried out. The construction method of sludge soil texture deep foundation pit excavation and pumping sand compacted backfilling is quite convenient and rapid to use, solves various adverse factors and construction problems of conventional excavation and backfilling of a pile plus sludge soil texture deep foundation pit, is applicable to excavation and backfilling of deep foundation pit engineering of all projects along the coast or in wet land mucky soil or with a high underground water level, and ensures normal construction of the engineering.

Description

technical field [0001] The invention relates to a foundation pit excavation construction method and a foundation pit backfill construction method. Background technique [0002] The traditional deep foundation pit excavation process is to use large-scale machinery such as tower cranes and excavators to excavate, and at the same time cooperate with dewatering. However, in the coastal areas where the water level is high and the soil is silty, this traditional deep foundation pit excavation method has the disadvantages of ineffective precipitation, high construction difficulty, high construction risk, long construction period and high construction cost. So need to improve. [0003] The traditional deep foundation pit backfilling process is to use large machinery such as tower cranes and dump trucks for backfilling. However, in coastal areas where the water level is high and the soil is silty, this traditional deep foundation pit backfill method has the disadvantages of difficu...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method of excavating deep foundation pits with silty soil and pumping and shaking sand backfilling. It is necessary to solve the problem of dewatering in the coastal areas where the water level is high and the soil is silty soil. The technical problems of inconspicuous effect, high construction difficulty, high construction risk, long construction period, and high construction cost, and the traditional deep foundation pit backfilling technology is difficult to construct, high construction risk, long construction period, and high construction cost. question

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