Deep foundation pit continuous retaining wall and construction method thereof

Abstract

The invention provides a deep foundation pit continuous retaining wall. The deep foundation pit continuous retaining wall comprises a continuous occlusion part and also comprises a plurality of protruding parts, wherein the continuous occlusion part is formed by mutually and continuously occluding at least one layer of cement soil pile bodies and is annularly arranged at the periphery of the foundation pit; the foundation pit is arranged by extending towards the lateral direction of the soil body; each protruding part consists of at least two mutually occluded cement soil piles; and the protruding parts are occluded with the cement soil pile bodies arranged in the continuous occlusion part at intervals. The mode that the pile body which is originally used for realizing pile body of multiple layers of continuous retaining walls is changed into that the foundation pit extends towards the lateral direction of the soil body, so that the continuous retaining wall completely utilizes the strong shear resistance of the soil body between every two protruding parts, the wall body is thickened on the premise of not increasing the number of the pile bodies, the deep foundation pit continuousretaining wall has the water blocking effect and has high side pressure resistance and low cost when exerting the soil retaining effect. The invention also provides a construction method of the deep foundation pit continuous retaining wall.

Description

technical field [0001] The invention relates to a foundation treatment method, in particular to a deep foundation pit continuous retaining wall and a construction method thereof. Background technique [0002] In order to stop water in deep foundation pits in the prior art, several interlocking water-stop piles are usually arranged along the wall of the foundation pit to form a retaining wall with water-stop function. In order to save costs, the water-stop piles are usually Cement-soil piles are used. However, the cement-soil piles are not strong enough to retain soil. In order to solve this technical problem, those skilled in the art usually arrange the concrete piles in the inner or outer layers of the cement-soil piles, or space them with the cement-soil piles. The concrete piles are arranged so that the cement-soil piles and the concrete piles form a bite, which not only achieves the effect of retaining soil and water, but also effectively reduces construction costs. Ho...

AI Technical Summary

Problems solved by technology

However, for deep foundation pits, the inward pressure of the foundation pit wall will be very large, which requires improving the compression resistance of the retaining wall to avoid being bent or even broken

In order to prevent the retaining wall from being bent or broken, it is a relatively common method for those skilled in the art to insert steel bars into the pile body, but this is only to improve the compressive resistance of the continuous retaining wall by improving the compressive resistance of a single pile body Another way is to design a number of piles into several ring-shaped continuous occlusal arrangements to obtain a continuous retaining wall with more than two layers, so as to increase the thickness of the continuous retaining wall, thereby improving the lateral pressure resistance of the continuous retaining wall. Although this method can relatively improve the compressive resistance of the continuous retaining wall, but because this kind of continuous retaining wall only utilizes the compressive performance generated by the interaction of the pile itself, while resisting the same compressive force, it will also affect the retaining wall. The thickness and the number of piles put forward higher requirements. In order to achieve greater pressure resistance, the usual practice of those skilled in the art is to increase the number of interlocking piles and arrange more rings of continuous retaining walls to increase the continuous The thickness of the retaining wall, which will increase the construction cost

Images