Unloading type thin-walled box dead walls borne by oblique vertical sectional steel tube piles and construction technology

Abstract

The invention discloses unloading type thin-walled box dead walls borne by oblique vertical sectional steel tube piles. The unloading type thin-walled box dead walls comprise a foundation pit, whereinbox wall modules are arranged at relative positions of the high-place floor and the lower-place floor, and each box wall module comprises a rear outer wall, a front outer wall, a left outer wall anda right outer wall; a plurality of lateral inner separation walls are arranged at opposite positions in the box wall modules; longitudinal inner separation walls are arranged at opposite positions inthe box wall modules; middle stress plates are arranged at opposite positions in the box wall modules; leftwards-projected haunched beams are arranged on the left side of the middle stress plates; rightwards-projected unloading plates are arranged on the right side of the middle stress plates; rafts in horizontal arrangement are arranged at the bottoms of the box wall modules, and a plurality of vertical steel pipe piles in vertical arrangement are arranged at the bottoms of the rafts; and a plurality of oblique steel pipe piles are arranged at opposite positions of the left sides of the rafts. The unloading type thin-walled box dead walls have the beneficial effects that the unloading type thin-walled box dead walls can be suitable for foundation pit edges formed in different complex terrains, and are good in stability and convenient to construct.

Description

technical field [0001] The invention belongs to the technical field of slope and foundation pit engineering specialized in geotechnical engineering, and in particular relates to an unloading thin-walled box-shaped retaining wall supported by oblique and vertical combined steel pipe piles and a construction process. Background technique [0002] In the backfill area of ​​deep soil layer after construction, a high slope of more than ten meters is built. The traditional "panacea" support form of pile-anchor structure cannot be implemented due to constraints. Many projects adopt the form of reinforced soil retaining wall structure. However, in some specific cases, such as the design of the retaining wall with a wide bottom, it is inevitable to cross or longitudinally pass through the pressure pipes and underground corridors within the influence range below, and the specified compaction work cannot be performed. Mechanical layering and compaction will affect the friction between ...

AI Technical Summary

Problems solved by technology

However, in some specific cases, such as the design of the retaining wall with a wide bottom, it is inevitable to cross or longitudinally pass through the pressure pipes and underground corridors within the influence range below, and the specified compaction work cannot be performed. Mechanical layering and compaction will affect the friction between the filler and the ribs, which will cause the support structure to fail to achieve the expected effect or fail, and even cause damage to the protected pipelines and corridors below

In view of the above reasons, it is necessary to develop an unloading box-type retaining wall supported by oblique and vertical steel pipe piles and a construction method to solve the problem of large earth pressure and poor anchoring effect caused by poor compaction of the backfill of the retaining wall. Poor problems, and anti-slip, anti-overturning effect, and can effectively protect the important pipelines and corridors below

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