Foundation pit support structure and construction method thereof

Abstract

The invention provides a foundation pit support structure and a construction method thereof. The foundation pit support structure is used in a building project of the coastal backfill area. The foundation pit support structure comprises at least one SMW construction method pile, a pre-stressed anchor cable and an enclosure ring beam. The enclosure ring beam is built on the multiple SMW construction method piles in the horizontal direction in a closed manner. The pre-stressed anchor cable anchors the SMW construction method piles and the enclosure ring beam. According to the geological condition characteristics of coastal areas, the foundation pit support safety is ensured, the foundation pit support effect is guaranteed, and meanwhile the construction efficiency is improved.

Description

technical field [0001] The present application relates to the field of machinery, in particular to a foundation pit support structure for construction engineering in coastal backfill areas and a construction method thereof. Background technique [0002] In the construction of coastal backfill areas, it is an enclosure and soil retaining method for foundation pit support engineering. In the past, in the construction of foundation pit engineering in coastal backfill areas in China, perforated piles or SMW piles (Soil MixingWall) were often used. ) combined with the support in the foundation pit for foundation pit support. [0003] In the past, when punching cast-in-situ piles were used as foundation pit support, the enclosure structure was relatively strong and difficult to remove, which would have a greater adverse effect on the parts that need to be excavated in the future, and this method required additional high-pressure jet grouting piles or Cement-soil mixing piles are ...

AI Technical Summary

Problems solved by technology

[0003] In the past, when punching cast-in-situ piles were used as foundation pit support, the enclosure structure was relatively strong and difficult to remove, which would have a greater adverse effect on the parts that need to be excavated in the future, and this method required additional high-pressure jet grouting piles or Cement-soil mixing piles are used to stop water, and a large amount of steel bars and concrete are required, and the cost is high; when using SMW construction method piles + support in the foundation pit, there are often a large number of lattice columns and steel concrete supports in the foundation pit, etc. structure, which to a certain extent affects the working faces of various machines in earthwork excavation and underground engineering construction.

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