Fabricated combined soil nailing wall with recoverable flexible surface layer and construction method

Abstract

The invention relates to a fabricated combined soil nailing wall with a recoverable flexible surface layer and a construction method. The fabricated combined soil nailing wall is characterized in thatinclined recoverable anchor rods and soil nails which are constructed on a pit wall at intervals are included, a hydrophobic layer, a waterproof geomembrane, a geogrid and a concrete fireproof layerare sequentially constructed on the pit wall, and the top of the waterproof geomembrane and the top of the geogrid are fixed to the top face of a foundation pit; transverse waist beams and longitudinal waist beams are arranged on the surface of the concrete fireproof layer, the recoverable anchor rods are fixed to the transverse waist beams, and the soil nails are arranged in the split areas of the longitudinal waist beams and the transverse waist beams. The construction method comprises the steps of upper-layer pit wall anchor rod and soil nail driving, upper-layer pit wall hydrophobic layerconstruction, upper-layer pit wall flexible surface layer construction, upper-layer anchor rod and soil nail fixing, lower-layer soil nail wall construction according to an upper-layer soil nail wallconstruction method and soil nail wall drainage construction. The structure has the advantages of being convenient to demount and mount, high in construction efficiency and capable of meeting the retaining and protection requirements of foundation pits of different depths.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to an assembled flexible surface layer recyclable composite soil nail wall and a construction method for the assembled flexible surface layer recyclable composite soil nail wall. Background technique [0002] There are mainly four types of surface courses in the traditional soil nail wall support system: shotcrete surface course, cast-in-place concrete surface course, precast concrete surface course and rigid panel, among which shotcrete surface course is the most commonly used in traditional soil nail wall Although the construction process of this surface layer is simple, it has the following deficiencies in the actual construction process: high concrete consumption and high cost, long curing time and low construction efficiency, construction noise and dust have a great impact on the environment, and the concrete surface layer and parts If the soil layer is not tig...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of high concrete consumption and high cost in the traditional shotcrete soil nail wall support system, long maintenance time and low construction efficiency, construction noise and dust have a great impact on the environment, and the concrete surface layer and part of the soil layer are not tightly connected to the support system. Due to the poor protection effect, the surface layer is easy to seep and fall off, an assembled flexible surface layer recyclable composite soil nail wall and its construction method are proposed.

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