Staggered crossing grooving method suitable for double-row narrow-distance ground wall construction

Abstract

The invention belongs to the related technical field of foundation pit construction, and discloses a staggered crossing grooving method suitable for double-row narrow-distance ground wall construction, which comprises the following steps: a simulation modeling analysis step; and a staggered and crossed excavation step. Wherein the operation design of performing staggered and crossed excavation on the double-row parallel grooves is as follows: firstly, the double-row parallel grooves are respectively divided into a plurality of mutually spaced small sections in advance along the extension direction, and the adjacent small sections of the double-row parallel grooves are staggered and overlapped to a certain extent; and then, the small sections of grooves which are staggered and overlapped with one another are excavated in sequence in a segmented mode, and then the remaining middle parts are excavated in sequence until the complete double-row parallel grooves are formed. By means of the method, disturbance to a thin-wall groove wall soil body is remarkably reduced, the groove stability is improved, collapse can be effectively controlled through the fluid-solid coupling effect, and meanwhile the method has the advantages of being convenient to control, high in safety, suitable for various complex construction environments and the like.

Description

technical field [0001] The invention belongs to the technical field related to foundation pit construction, and more particularly relates to a dislocation cross-grooving method suitable for the construction of double-row narrow-spaced ground walls. Background technique [0002] The underground diaphragm wall is formed by using trenching machinery to excavate deep and narrow underground trenches with the aid of the mud retaining wall, and further pouring suitable materials to form the continuity of seepage barrier effect, soil retaining effect and load-bearing function. underground wall. Ground-connected wall excavation technology has been widely used in various underground projects due to its characteristics of low construction vibration, high wall stiffness, good integrity, fast construction speed, and strong adaptability. [0003] The existing general construction of connecting walls is usually based on the designed construction drawings and geological data, and the const...

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Problems solved by technology

[0005] However, further studies have shown that the above-mentioned prior art still has the following defects or deficiencies: first, in the construction of special objects such as double-row narrow-distance ground walls, under the action of high pressure water head, especially on one side After the construction is completed, when the other side is being constructed, it is difficult or impossible to form a trench in the prior art. This phenomenon is particularly prominent in the complex construction environment and geological conditions of the city.

Secondly, the trenching construction scheme of the prior art does not fully consider how to reduce the disturbance to the soil mass of the thin-walled trench wall between the double-row ground walls, and at the same time, it is impossible to determine how to arrange the trenching more reasonably under the action of high pressure water head construction process

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