Large-span deep foundation pit combined supporting structure

Abstract

The invention discloses a large-span deep foundation pit combined supporting structure. The large-span deep foundation pit combined supporting structure comprises four mutually symmetrical supporting mechanisms and a supporting wall, the four supporting mechanisms are installed inside the supporting wall, and each supporting mechanism comprises a first supporting frame, a fixing frame, a connecting frame, a second supporting frame and an arch-shaped frame; and the outer surfaces of the first supporting frames are in threaded connection with the outer surfaces of the connecting frames through bolts. According to the structure, the four supporting mechanisms are used for being matched with the supporting wall, the supporting mechanisms are matched with one another through the first supporting frames, the second supporting frames, the connecting frames, the arch-shaped frames and other structures, soil layer horizontal pulling force on the two sides is counteracted through the arch-shaped frames, correspondingly, the first supporting frames and the second supporting frames are matched with one another, based on the principle of effective stress, the pore pressure of the soil layer is offset twice by increasing the effective stress, so that the structure can effectively bear the heavy pressure load, and the practical requirement of the structure is met.

Description

technical field [0001] The invention relates to the technical field of foundation pit support structures, in particular to a combined support structure for large-span deep foundation pits. Background technique [0002] Foundation pit support is to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, and the support, reinforcement and protection measures adopted for the side wall of the foundation pit and the surrounding environment; [0003] The most common cantilever support frame is limited by the traditional structural design. It is anchored in the poor and soft loose rock soil layer. From the perspective of the top view, the larger the span, the deeper the depth. The single-layer cantilever support The horizontal tensile force of the frame is difficult to withstand the lateral pressure of the soil, and the larger the span, the metal stress of each part of the cantilever itself will be torn under the triple tea...

AI Technical Summary

Problems solved by technology

[0003] The most common cantilever support frame is limited by the traditional structural design. It is anchored in the poor and soft loose rock soil layer. From the perspective of the top view, the larger the span, the deeper the depth. The single-layer cantilever support The horizontal tensile force of the frame is difficult to withstand the lateral pressure of the soil, and the larger the span, the metal stress of each part of the cantilever itself will be torn under the triple tear of gravity, weighing shear force and horizontal tensile force of the soil layer, and its service life will be greatly reduced. There will be greater constraints and impacts on construction

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