Slope foundation pit supporting method

Abstract

The invention discloses a slope foundation pit supporting method. The slope foundation pit supporting method comprises the following steps that S1, the depth of a foundation pit and the position of a slope are determined, holes are drilled in a road surface for many times, the depth of the holes is larger than that of the foundation pit, a reinforcement cage is arranged in each hole, concrete is poured into a concrete pile, and the part, higher than the ground, of the concrete pile is built with the concrete and steel bars; and S2, a foundation pit side slope is excavated through an excavator, soil nails are used for drilling holes in the side slope, the drilled soil nails are connected with spray irrigation concrete through steel bar sheets, and a soil nail wall is manufactured. The problems that an existing slope protection structure is a protection net, but the protection net is large in weight, wide in coverage area and large in gravel cleaning difficulty, falling stones cannot be cleaned out in time, a crown beam or the protection net is in a continuous stress state, large construction accidents are prone to being caused when the protection net is damaged, and therefore, a relatively large safety risk exists when a worker carries out construction at the bottom of the foundation pit are solved.

Description

technical field [0001] The invention relates to the technical field of foundation pit side slope support methods, in particular to a side slope foundation pit support method. Background technique [0002] The foundation pit is an earth pit excavated at the foundation design position according to the base elevation and foundation plane size. The pit engineering mainly includes the design and construction of the foundation pit support system and earth excavation. The foundation pit support is mainly to prevent the side of the foundation pit from collapsing and to prevent the vehicle personnel from falling on the top of the foundation pit; the difficulty of foundation pit support lies in, The soil layer within the excavation depth range of the foundation pit is miscellaneous fill, silty clay, silty clay, fine sand, gravel sand, phyllite, strongly weathered phyllite and moderately weathered phyllite. In the process of foundation pit excavation and foundation construction, defor...

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Problems solved by technology

[0003] proposed "a large-scale deep foundation pit support construction structure and its method" in the Chinese invention patent application CN112211199A. This patent mainly solves the existing foundation pit protection device , it will occupy a large area at the bottom of the foundation pit, resulting in a waste of construction materials, and it is also inconvenient to carry out construction inside the foundation pit;

[0004] In the Chinese invention patent application CN111877369A, a "construction method for slope support and reinforcement" was proposed. This patent mainly solved the problem that the existing bolt support has its relatively large The limitations are mainly manifested in the fact that it is greatly affected by the soil, and when the soil layer is soft, it cannot provide effective protection;

[0005] Although the two invention patent application documents mentioned the problem of protection against crushed stones, they did not propose a treatment method for crushed stones. Due to the existing slope The protective structures are all protective nets, but the protective nets are heavy and cover a wide area. At the same time, it is difficult to clean up the gravel, so that the fallen stones cannot be cleaned out in time, which leads to continuous stress on the crown beam or protective net. Once the protective net is damaged, it is easy to cause a large construction accident, causing the staff to carry out construction at the bottom of the foundation pit, and there is a large safety risk

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