Deep foundation pit supporting structure and deep foundation pit construction method

Abstract

The invention discloses a deep foundation pit supporting structure. The deep foundation pit supporting structure comprises a slope body, wherein the slope body comprises an upper end plane, a slope surface and a lower end plane; a fixed plate is arranged on a position, close to the slope surface, of the upper end plane; the lower end of the fixed plate is fixedly connected with a fixed anchor rod; the fixed anchor rod is fixedly embedded into the slope body; one end, close to the slope surface, of the fixed plate is fixedly connected with an upper limiting plate which is in vertical contact with the slope surface; and a plurality of fixed wood piles which are longitudinally distributed are fixedly embedded into a position, close to the slope surface, of the lower end plane. A construction method of the deep foundation pit supporting structure comprises the following steps of: S1, excavating a foundation pit; and S2, mounting the fixed plate, turning up a protective plate, connecting a cushion block with the fixed plate through a fixed bolt, supporting the protective plate through a reinforcing rib, and fixing the fixed plate on the upper end plane through the fixed anchor rod. The deep foundation pit supporting structure has the advantages that the supporting structure can be repeatedly utilized in construction of each layer of the foundation pit, so that construction cost of the deep foundation pit is greatly reduced, and use is simple and operation is easy.

Description

technical field [0001] The invention relates to the technical field of foundation pit support, in particular to a deep foundation pit support structure and a deep foundation pit construction 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. Before excavation, the excavation plan should be determined according to the geological and hydrological data, combined with the conditions of the buildings near the site, and waterproof and drainage work should be done. If the excavation is not deep, the side slope can be used to stabilize the soil slope, and the slope size is determined according to the relevant construction regulations. The 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 ...

AI Technical Summary

Problems solved by technology

[0003] During the excavation and construction of existing deep foundation pits, excavation equipment is usually required to excavate layer by layer, that is, after excavating a foundation pit of a certain depth, enter the bottom of the foundation pit to excavate the next layer until the specified depth is reached. Depth, that is, excavation at the level level, and after the excavation of each layer is completed, the slope of each layer of the foundation pit needs to be supported and reinforced to prevent the loose soil from collapsing and landslide accidents. The labor and equipment for construction in the pit play a protective role, but the existing support structure consumes a lot of materials and cannot be reused during the construction process, resulting in high construction costs

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