Variable-frequency soil nailing wall and supporting method thereof

Abstract

The invention discloses a variable-frequency soil nailing wall and a supporting method thereof. The variable-frequency soil nailing wall comprises a side slope soil layer, a plurality of rows of soilnails are implanted into the side slope soil layer from top to bottom; the density of the soil nails on each row gradually increases downwards; the end parts of the soil nails extend out of the surface of the side slope soil layer and are connected with a reinforcing mesh; a concrete surface layer is paved on the reinforcing mesh; the thickness of the concrete surface layer gradually increases from top to bottom; the side slope soil layer comprises internal corners and external corners; the embedded steel bar density of each row of soil nails at the internal corners gradually decrease from themiddle to internal corner points on the two sides, the embedded steel bar density of each row of soil nails at the external corners gradually increases from the middle to external corner points on the two sides, and the embedded steel bar density of each row of soil nails at the external corners at the same height is smaller than that of each row of soil nails at the internal corners. According to different stresses on the slope surface, the density of the soil nails can be more reasonably distributed, the supporting strength of the soil nailing wall is improved, and waste is reduced.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a frequency conversion soil nail wall and a supporting method thereof. Background technique [0002] Soil nailing is an in-situ soil reinforcement technique. The side slope of the foundation pit is reinforced by soil nails made of steel bars, and a reinforcement mesh is laid on the surface of the side slope, and then a layer of concrete surface layer is sprayed and the earthwork side slope is combined with the side slope reinforcement support construction method. Its structure is a complex formed by the reinforcement rods (i.e. soil nails or anchors) set in the slope and the surrounding soil firmly bonded, and a support structure similar to a gravity retaining wall formed by the surface layer. [0003] For general simple foundation pit support, the most conventional and simple support method is the soil nail wall support method. However, in the conventional proces...

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Problems solved by technology

[0004] 1. The distance from the inner corner is different, the force of the soil is not fully considered, resulting in waste, and the soil quality and local changes are not considered, leaving hidden dangers

There is no distinction between local changes in soil stress caused by changes in the plane shape of the slope, and it is one size fits all. There are hidden dangers for large stresses, and waste for small stresses.

[0005] 2. The overall thickness of the surface layer on the slope and down the slope is the same. It is a waste for the part with small stress on the upper part of the slope, and a hidden danger for the lower part. It is unscientific and has not achieved fine design and construction.

[0006] 3. Conventional practices such as figure 1 and 2 As shown, the spacing of each row of soil nails is the same, and the thickness of the slope body is the same. There is no differentiated design, resulting in a lot of waste

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