A mechanism for improving the verticality qualification rate of steel lattice columns in open-cut tunnel foundation pit and using method thereof

Abstract

The invention relates to a mechanism for improving the verticality qualification rate of a steel lattice column in an open-cut tunnel foundation pit and a method for using the mechanism. The circular array on the connection platform is provided with a number of steel lattice column and beam connecting seats; the circular array on the connecting platform A of the reference device is provided with a number of top connecting seats, and the bottom of the top connecting seat is connected with a steel cable connecting sleeve A through a universal spherical hinge mechanism A The bottom reference mechanism includes a support sleeve B that is socketed on the outer wall of the steel lattice column, and the support sleeve B is in contact with the outer wall of the steel lattice column through the bottom extrusion mechanism A and the bottom extrusion mechanism B; the reference device is connected to the circular array on the platform B There are a number of bottom reference frames, the top of the bottom connecting seat is equipped with a steel cable connecting sleeve B through a universal spherical hinge mechanism B, and the steel cable connecting sleeve A and the steel cable connecting sleeve B are connected by a steel cable; through detecting that the steel cable is opposite to the bottom The relative offset of support sleeve A and support sleeve B can be obtained by referring to the position of the frame.

Description

technical field [0001] The invention relates to a mechanism for improving the verticality pass rate of a steel lattice column in an open-cut tunnel foundation pit and a method for using the same, belonging to the technical field of traffic construction. Background technique [0002] In the traffic construction, the underpass tunnel is used to cross the proposed intersection road to improve the traffic capacity. In the construction of underpass tunnels, open-cut construction is often used. Due to the limited construction space, vertical support and open-cut construction are often used for deep foundation pits of underpass tunnels. When the width of the foundation pit is large, in order to increase the support structure of the foundation pit Stability, in the design of the middle part of the foundation pit, the steel lattice column is used as the temporary fulcrum of the supporting structure, the top of the steel lattice column is anchored in the horizontal concrete support, a...

AI Technical Summary

Problems solved by technology

[0003] The existing steel lattice column construction technology has certain disadvantages in construction. The installation and positioning are not accurate enough, especially the control of its verticality is not good. When the verticality deviation is found to be large after the excavation of the foundation pit, it is difficult to carry out Deviation correction, or the cost of deviation correction is high, if it is used directly, it will seriously affect the safety of the foundation pit support structure

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