Tension-compression assembly type beam string structure steel supporting system

Abstract

The invention relates to a tension-compression assembly type beam string structure steel supporting system. The system comprises a concrete beam and a tensile connecting device. A tensile piece is arranged at the upper portion of the concrete beam in a foundation pit and can be made of profile steel or profile steel concrete or reinforced concrete. Tensile section steel is arranged at the tail endof a tensile arm of the tensile connecting device, and after the tensile arm penetrates through the tensile piece, the tensile arm abuts against the back face of the tensile piece through the tensilesection steel to achieve tensile connection. The tensile arm and a supporting prestress applying device are fixedly connected with a prestress connecting piece, and a supporting stress applying device applies pressure to the concrete beam. The problem that a traditional steel support can only bear pressure and cannot bear tension is solved, in a deep foundation pit with poor soil quality, a firstsupport (usually a support tension working condition exists) can also adopt a steel support, and therefore multiple steel supports can form an integrated supporting system, and the whole supporting system is more stable and safer.

Description

technical field [0001] The invention relates to a tension-compression assembled string string beam steel support system, which belongs to the technical field of building construction. Background technique [0002] In order to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, the support, reinforcement and protection measures are adopted for the side wall of the foundation pit and the surrounding environment. Whether it is a deep foundation pit project for high-rise buildings or subway construction, since most of them are excavated in cities, there are usually various structures such as traffic arteries, existing buildings or pipelines around the foundation pit. Safe, and meet the needs of the construction period and environmental protection, the steel support structure system is widely used in the support of urban foundation pits. [0003] In the prior art, the steel support system of the foundation pit can on...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the steel support system of the foundation pit can only bear compression but not tension

For deep foundation pits, there is silt in the soil outside the pit, or the excavation is unbalanced on both sides of the external corner support of the foundation pit, and in the case of multiple supports, the enclosure structure may appear under different working conditions such as excavation and support replacement. The external expansion will lead to the detachment of the enclosure structure from the support, which is inconsistent with the calculation force assumption, and it is difficult to deal with the uncertainty of foundation pit excavation, which may cause foundation pit safety problems

Images