Combined lattice steel frame spray anchoring supporting method and combined lattice steel frame spray anchoring supporting structure

Abstract

The invention provides a combined lattice steel frame spray anchoring supporting method and a combined lattice steel frame spray anchoring supporting structure. The structure comprises a reinforced concrete top beam, an L-shaped connecting rib, lattice steel frames, a connecting rib, a horizontal inner supporter, a backing type steel hidden supporter, an advanced small conduit, a steel bar net sheet and sprayed concrete, wherein the advanced small conduit is provided with grouting holes, the lattice steel frames are formed by a plurality of sections of transverse H section steel and a plurality of sections of longitudinal section steel surrounding purlins, the horizontal inner supporter is erected between the lattice steel frames arranged at two sides of a foundation pit, and the backing type steel hidden supporter is arranged at the foundation bottom of the foundation pit. The method and the structure have the beneficial effects that the lattice steel frames are processed section by section on the ground and are combined and mounted in the pit, the operation construction is convenient, and the quality control is convenient; the support structure is excavated and supported one house rack by one house rack from top to bottom, the construction does not need large-scale mechanical equipment and can be completed through manual work, and the construction cost is low; the occupied operation are is very small, and the method and the structure are mainly suitable for the small-foundation-pit-excavation-area foundation pit support which has the square, striped and round plane shape and is convenient for inner supporter arrangement.

Description

technical field [0001] The invention relates to the field of foundation pit support, in particular to a combined lattice steel frame spray-anchor support method and its support structure, which are suitable for complex foundation pit environments and small excavation areas. Background technique [0002] With the continuous construction of urban infrastructure, the surrounding environment of the foundation pit is becoming more and more complex, which puts forward higher requirements for the design and construction of the foundation pit engineering, not only to ensure the safety of the foundation pit support structure, but also to ensure the safety of the foundation pit Safe use of surrounding buildings (structures), underground pipe network and roads. The construction of traditional foundation pit support structures generally requires large-scale machinery and equipment, which cannot be completed manually, and the construction cost is high. For foundation pits with complex su...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a combined lattice steel structure suitable for the construction of deep foundation pits with narrow working surfaces, aiming at the shortcomings of complex foundation pit environment, small excavation area, and inability to adopt traditional foundation pit support structures. Supporting Method and Supporting Structure of Frame Shotcrete Anchor Foundation Pit

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