Active-control-based deep foundation pit profile steel supporting system

Abstract

The invention discloses an active-control-based deep foundation pit profile steel supporting system. The active-control-based deep foundation pit profile steel supporting system comprises concrete poured deep foundation pit walls and embedded parts buried in the deep foundation pit walls. Steel supporting seats fixedly connected with the embedded parts are tightly arranged on the sidewalls of thedeep foundation pit walls. Multiple steel enclosing purlins are detachably connected between the steel supporting seats on the deep foundation pit walls of the two sides, wherein a steel support pouring jacket is detachably mounted between one end of each steel enclosing purlin and the corresponding steel supporting seat; and a jack is mounted in each steel support pouring jacket. The active-control-based deep foundation pit profile steel supporting system has the beneficial effects that prestressing force of a steel supporting system can be actively adjusted according to deformation of a foundation pit so as to generate stable supporting stress to an underground diaphragm wall to guarantee no deformation of a foundation pit enclosure structure, an enclosure wall body and an underground diaphragm wall body; and the safety of facilities on the periphery of the foundation pit is protected.

Description

technical field [0001] The invention relates to the field of deep foundation pit shaped steel support, in particular to a deep foundation pit shaped steel support system based on active control. Background technique [0002] Factors such as soil excavation in the foundation pit, external loads, and rain erosion in the natural environment will cause the foundation pit to deform, which may cause the bottom of the foundation pit to bulge, the wall to deform, and the wall to displace and settle, and even cause the soil at the boundary of the foundation pit to collapse. body slip occurs. [0003] When excavating the foundation pit, with the continuous reduction of the soil inside the foundation pit, the inner side of the retaining wall loses the original earth pressure, while the outer side bears the active earth pressure, and the magnitude of the load does not change, so the excavation of the foundation pit is damaged The original equilibrium state of the inside and outside of ...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a deep foundation pit steel support system based on active control in order to solve the above problems, so as to solve the problem that the prestress of the traditional steel support system in the prior art cannot be actively adjusted according to the deformation of the foundation pit. When the foundation pit is deformed, the steel support system will not be able to produce stable supporting stress on the underground diaphragm wall, which will cause deformation of the foundation pit enclosure structure, wall items of the enclosure wall and the underground diaphragm wall, seriously affecting the safety of the surrounding facilities of the foundation pit And other issues

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