Horizontal displacement control device of large foundation ditch bracket column

Abstract

The invention relates to the field of civil engineering, in particular to a horizontal displacement control device of a large foundation ditch bracket column. The horizontal displacement control device comprises an inner supporting beam, the bracket column, an upper support steel sheet, a rubber support and a lower support steel sheet. In some large foundation ditch projects, sometimes, a supporting component can reach a length of more than 300 meters and is sensitive to the temperature and the like. The total extending and contracting amount of the supporting component can reach more than 15 centimeters along with the environment temperature increasing and decreasing in winter and summer. According to the conventional processing method, the supporting beam is fixedly connected with the bracket column, the top of the bracket column and the supporting beam are synchronously moved, the bottom end of the bracket column is fixedly embedded into a foundation, and due to the P-delta effect, a latticed column may lose stability and be damaged due to too large internal force. By means of the horizontal displacement control device, due to the fact that the shearing rigidity of the support is lower than the horizontal deformation rigidity of the bracket column, when the supporting beam deforms, the relative displacement between the bracket column and the supporting beam can be consumed by the shearing deformation of the support, the horizontal displacement of the top end of the bracket column is effectively reduced, and the instability probability caused by too large internal force of the bracket column is decreased.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a device for controlling the horizontal displacement of a support column in a large-scale foundation pit. Background technique [0002] Building foundation pit refers to the space below the ground excavated for the construction of building foundation and basement. Temporary wells excavated for building foundations are called foundation pits. The foundation pit is a temporary project, and its function is to provide a space so that the foundation masonry can be carried out according to the position specified by the design. Common foundation pit support methods are divided into: horizontal support, vertical support, anchor support, inclined column support, diaphragm support, temporary retaining wall support, etc. At present, the economic development of my country's eastern coastal areas is relatively developed, and the infrastructure construction is intensive. However, due to the...

AI Technical Summary

Problems solved by technology

It can be seen that in the foundation pit engineering, ensuring the safety of the horizontal support members is the top priority. In the foundation pit engineering, the horizontal deformation of the long horizontal support members is relatively large, which will cause the synchronous displacement of the lower supporting columns. Because the supporting columns It is a slender compression member, affected by the P-Δ effect, the excessive horizontal displacement of the top will easily lead to the instability of the supporting column, which will lead to the failure of the horizontal support and cause the safety accident of the foundation pit

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