Foundation trench supporting box for underground pipeline open excavation construction

Abstract

The invention discloses equipment for supporting a pipeline foundation trench during underground pipeline open excavation construction, belongs to the field of underground pipeline construction equipment, and particularly relates to a foundation trench supporting box for underground pipeline open excavation construction. The foundation trench supporting box comprises a bottom-layer supporting box body and a heightened supporting box body; the bottom-layer supporting box body comprises a first soil retaining side wall, a second soil retaining side wall and cross braces which are parallel to each other and are only arranged at two ends of the bottom-layer supporting box body; and the heightened supporting box body comprises a first soil retaining side wall, a second soil retaining side wall and cross braces which are parallel to each other and are only arranged at two ends of the heightened supporting box body. The box-type supporting structure is assembled outside a pipeline foundation trench, the installation time of supporting equipment is shortened, during excavation operation, rock soil below leg wires of the bottom-layer supporting box body is excavated firstly, the supporting box is disengaged, then the supporting box is forced to sink by means of the gravity of a box body and the pressure or impact force of a bucket of an excavator, professional inserting and driving equipment is not needed, the supporting construction technology is simplified, and the work efficiency of supporting is remarkably improved.

Description

[0001] Technical field [0002] The invention relates to equipment for supporting pipeline foundation grooves during open-cut construction of underground pipelines, and belongs to the field of underground pipeline construction equipment, in particular to a foundation groove support box for underground pipeline open-cut construction. Background technique [0003] At present, in the excavation and support construction of the pipeline foundation trench, the traditional method adopts the support method of Larsen steel plate. After digging to a certain depth, install the purlins and cross supports to form a support structure to stabilize the foundation trench. After the pipes are installed and the pipe trenches are backfilled to a certain height, the purlins and transverse supports are removed, and then the steel sheet piles are pulled out. However, the traditional approach has the following problems in practical application: [0004] The insertion and driving of Larsen steel shee...

AI Technical Summary

Problems solved by technology

[0004] The insertion and driving of Larsen steel sheet piles requires professional sheet pile insertion and driving equipment, the construction process is complicated, and the construction cost is relatively high

[0005] The insertion and driving of Larsen steel sheet piles and the installation of purlins and cross supports must be carried out in the foundation trench of the pipeline, and cannot be assembled outside the foundation trench in advance, and the construction period is long

[0006] Larsen steel sheet pile insertion must accurately ascertain the layout of the existing underground pipeline facilities in advance. If the existing underground pipeline facilities are not verified accurately, the existing pipeline facilities will be easily damaged during insertion.

[0007] The lengths of steel sheet piles required for foundation trench support of pipelines with different excavation depths are different, and standardized construction cannot be carried out

[0008] The range of applicable soil layers is limited. In theory, Larsen steel sheet piles are not suitable for medium and slightly weathered rock and soil layers.

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