Construction method of deep foundation pit earthwork ramp

Abstract

The invention relates to a construction method of a deep foundation pit earthwork ramp. The method is characterized by comprising the steps of ramp monitoring, ramp construction and primary grinding; slope supporting and drainage are conducted, specifically, after the ramps are compacted through rolling, slope supporting and drainage construction are started, slope supporting adopts a soil nailing wall mode, the spraying sequence in the same section needs to be from bottom to top, and after primary spraying, a net is hung to spray a second layer; after the sprayed concrete is finally set for 2 hours, the water spraying maintenance time is not less than 7 days; and surface layer construction: after the slope support construction is finished, removing the steel plate of the ramp surface layer, flattening the gravel layer, pouring and grooving the surface, arranging a single-layer reinforcing mesh in the gravel layer, and carrying out segmented construction along the longitudinal direction of the ramp. Therefore, the deep foundation pit ramp construction method is convenient to construct, safe in structure and programmed, the problems that in deep foundation pit engineering, the ramp and the inner support interfere with each other, and safety is difficult to guarantee are solved, and the purpose of combining economic benefits is achieved.

Description

technical field [0001] The invention relates to the technical field of foundation pit construction, in particular to a construction method of a deep foundation pit earthwork ramp. Background technique [0002] In general deep foundation pit projects, a large number of heavy machinery and vehicles will be used in the construction process. The setting of the upper and lower slopes of the foundation pit is essential, and the foundation pit is designed to ensure the structural safety of the foundation pit itself. The support, whether it is a concrete structure or an internal support of a steel structure, has horizontal and vertical components, and its structural forms are diverse and the distribution is complex. Ordinary earthwork ramps are easy to interfere with the support in the foundation pit, which affects the safety of the foundation pit. After the road is formed, how to conduct organized drainage and prevent collapse is also a difficult problem. Similar projects mostly u...

AI Technical Summary

Problems solved by technology

[0002] In the general deep foundation pit project, a large number of heavy machinery vehicles will be used in the construction process. Whether it is the inner support of the concrete structure or the steel structure, there are horizontal and vertical components, and its structural forms are diverse and the distribution methods are heterogeneous. Ordinary earthwork ramps are likely to interfere with the inner support of the foundation pit, which affects the safety of the foundation pit. After the road is formed, how to carry out organized drainage and prevent collapse is also a difficult problem

Similar projects often use steel trestle bridges as the up and down slopes of foundation pits, and use the flexibility of steel structure design to avoid interference with internal supports, but the high cost, difficult construction, and long period are not conducive to project progress

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