A conversion structure and conversion method for the force transmission path of the support structure in the foundation pit

Abstract

The invention discloses a conversion structure and conversion method for force transmission paths of a bracing support structure in a foundation pit. The conversion structure comprises force transmission belts arranged between a main body structure and support piles. The first sides of the force transmission belts are connected with the support piles through first shear keys. The second sides of the force transmission belts are connected with the main body structure through second shear keys. When first angle braces or second angle braces on the corresponding positions of the first shear keys and the second shear keys are dismantled, the shear force is formed for making a balancing action on active earth pressure of the outer sides of the support piles, synchronous symmetrical stress of the support angle braces in the same group is converted to independent force transmission of the first angle braces or the second angle braces. When a single inner brace in the same group of the inner braces needs to be dismantled in advance, a shear key structure is arranged on the corresponding force transmission belt, the active earth pressure acting on the outer sides of the support piles is converted to act on the support piles in the direction parallel to the active earth pressure direction through a basement structure and the shear keys, conversion of the force transmission systems is achieved, and the technological problem that the inner braces are dismantled in advance is solved.

Description

technical field [0001] The invention relates to a support and support structure in a foundation pit, in particular to a conversion structure and a conversion method for a force transmission path of the support and support structure in a foundation pit. Background technique [0002] With the shortage of urban land resources and technological innovation, the development of underground space has received more and more attention and development, and a large number of ultra-deep underground space structures have emerged, and deep foundation pit engineering has emerged as the times require. At the same time, due to the large differences in hydrogeological conditions in various regions, when there are poor geological conditions such as sandy soil strata, silt strata, and reclamation areas, internal support structures are generally used to ensure the safety of foundation pits; however, internal support supports The structure is relatively complex, involving a series of technical pro...

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Problems solved by technology

At the same time, due to the large differences in hydrogeological conditions in various regions, when there are poor geological conditions such as sandy soil strata, silt strata, and reclamation areas, internal support structures are generally used to ensure the safety of foundation pits; however, internal support supports The structure is relatively complex, involving a series of technical problems such as many processes, long construction period, and difficult support replacement; usually, the first floor of the basement structure is constructed, and the fertilizer tank is symmetrically backfilled, and the force belt is symmetrically constructed before it can be dismantled Corresponding to the internal support, under this working condition, the basement structure has a long construction interruption time and cannot continue to work, which has a great impact on the construction organization and construction period of the project

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