A gravity retaining wall and its construction method

Abstract

The invention discloses a gravity retaining wall and a construction method thereof. The gravity retaining wall is arranged in a sludge foundation pit. The foundation pit comprises a side face and a bottom surface. The gravity retaining wall comprises a plurality of oblique piles and a plurality of vertical piles. The multiple oblique piles incline towards the side face from the ground surface on the outer side of the foundation pit and are in mutual engagement and lap joint to form an oblique water interception curtain. The multiple vertical piles are arranged on the side face and are in mutual engagement and lap joint to form a vertical water interception curtain. A surrounding area with a triangular cross section is formed after the vertical water interception curtain and the oblique water interception curtain are combined. A gravity unit is formed after drainage consolidation is conducted on sludge in the surrounding area. According to the gravity retaining wall and the construction method thereof, local materials are used, a supported soil body which is prone to collapse is used as a supporting structure gravity unit after the supported soil body is subjected to engineering improvement, the supporting effect is improved remarkably, the working safety in the foundation pit is improved, the construction method is simple and easy to operate, and the applicability is high; and compared with a traditional foundation pit supporting technique, the safety performance is higher, and the economic applicability is higher.

Description

technical field [0001] The invention relates to the technical field of building foundation engineering, in particular to a construction technique for consolidating silt-like soil to form a gravity-type retaining wall, which is mainly used in large-scale deep foundation pit excavation projects in coastal areas where the lower soil layer is silt-like soil. Background technique [0002] In large-scale deep foundation pit excavation and support projects in coastal areas, traditional construction support methods include: underground diaphragm wall support structure, concrete gravity retaining wall structure, soil nail wall support structure, cast-in-place pile support structure, etc. Groundwater and seawater are connected, and are strongly affected by coastal tides, so groundwater seepage is extremely complex. The empirical range of water content in silt soil in coastal areas is 40% to 90%, which is far beyond the liquid limit of silt soil, which is 30% to 60%. The void ratio is g...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the technical problems of the existing deep foundation pit excavation and support engineering, such as large amount of support engineering, high cost, and difficult support in the excavation of deep foundation pits with silt soil in the lower soil layer, and provide a force-bearing A simple system, economical and applicable, safe and efficient foundation pit support construction method, especially suitable for a gravity retaining wall and its construction method for muddy foundation pits

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