Foundation pit inclined support system and foundation pit inner support construction method

Abstract

The invention discloses a foundation pit inclined support system and a foundation pit inner support construction method. The foundation pit inclined support system comprises a side wall enclosure structure of a foundation pit, a top beam connected with the side wall enclosure structure, a steel pipe inclined strut and a bracket, wherein the bracket is fixedly arranged on a foundation pit bottom plate, the steel pipe inclined strut is arranged between the side wall enclosure structure and the foundation pit bottom plate in an inclined strut mode, one end of the steel pipe inclined strut is fixedly connected with the top beam, and the other end of the steel pipe inclined strut is fixedly connected with the bracket. The foundation pit inner support construction method is based on the foundation pit inclined support system and comprises the following steps of (1) mounting a long type inclined strut; (2) excavating reserved soil and constructing a residual bottom plate; (3) mounting a short type replacement support and removing the long type inclined strut; and (4) constructing a main body structure and removing the short type inclined strut. The foundation pit inclined support system and the foundation pit inner support construction method have the advantages that supporting materials can be recycled, so that the supporting rigidity is increased; and the support construction period is short, the reserved soil excavation difficulty is reduced, the construction cost is reduced, and the construction safety is improved.

Description

technical field [0001] The invention relates to a support structure for a foundation pit, in particular to an oblique support system for a foundation pit and an internal support construction method for the foundation pit. Background technique [0002] The function of the foundation pit support system should ensure that the foundation pit excavation and structural construction can be successfully completed according to the established plan under the condition of no water. It is necessary to keep the side wall stable and limit the deformation of the soil layer to ensure that the existing buildings and For the normal use of the facilities, it is necessary to keep the soil at the bottom of the pit stable, so as to ensure that the soil at the bottom of the pit and the foundation are not damaged in terms of structure and function. [0003] In the coastal and riverside areas, soft soil with a certain thickness generally exists within the depth range affected by engineering construc...

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Problems solved by technology

[0006] b. The support structure is not allowed to enter the surrounding underground soil;

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