Super-large-section tunnel deformation control device and using method

Abstract

The invention discloses a super-large-section tunnel deformation control device and a using method, and belongs to the field of tunnels. The super-large-section tunnel deformation control device comprises an arch crown frame, two middle connecting frames and a bottom face inverted-arch frame. The two middle connecting frames are located on the two sides respectively and fixedly connected with oneend of the arch crown frame and one end of the bottom face inverted-arch frame respectively so as to form a closed loop matched with the cross section of a tunnel. Stress adjusting rods are arranged on the two sides of each middle connecting frame, one end of each stress adjusting rod penetrates through the corresponding middle connecting frame to be fixedly connected with the arch crown frame, the other end of each stress adjusting rod penetrates through the corresponding middle connecting frame to be fixedly connected with the bottom face inverted-arch frame, and the connecting position of one end of each stress adjusting rod is adjustable. The connecting length of the stress adjusting rods can be conveniently adjusted, so that the direction of acting force is controlled and the tunnel can be well supported by the middle connecting frames.

Description

technical field [0001] The invention relates to the field of tunnels, in particular to a super-large-section tunnel deformation control device and a use method. Background technique [0002] With the continuous development of my country's railway construction, especially the large-scale construction of high-speed railways, the number of railway tunnels is increasing, and the length of the tunnels is getting longer and longer, followed by high-speed railway tunnels and tunnels. The safety design of the inner track structure, especially the safety design of the high-speed railway tunnel passing through the special environment section. When the tunnel passes through the weak fractured zone, especially in the area of ​​the active fault zone, due to the difference in geological conditions of the surrounding rock, when an earthquake occurs, the seismic response of the tunnel structure is very large, especially in the area where the tunnel passes through the junction of soil and roc...

AI Technical Summary

Problems solved by technology

At present, in order to ensure the structural stability and safety of the high-speed railway tunnel passing through the large earthquake deformation section, there are two commonly used treatment methods as follows: one method is to set a large deformation ring at the junction of soil and rock, and the deformation ring is flexible Joint structure, the flexible structure allows the lining connected at both ends to be displaced by tension, compression and shear within a certain range, so as to reduce the seismic response of the structure in the rest of the tunnel; another method is to carry out cross-sectional Excavation expansion, through cross-section expansion in the weak broken zone or soft and hard abrupt changes, directly increase the reserved space between the lining structure of the expansion excavation section and other sections of the structure, this method allows the lining structure of the expansion excavation section Sufficient displacement, thereby greatly reducing the seismic response of the lining structure of the expanded excavation section, but this method is only applicable to the case where the fault zone span is small , and cause a significant increase in project cost

[0003] Reinforcement frames can be added in the position where the tunnel is prone to stress and deformation. After the tunnel reinforcement frame is installed, due to the different deformations in various places, the reinforcement frame installed according to the original design will generate compressive or tensile stress, while the existing frame cannot be easily Good adjustment of the stress situation, so that the reinforcement frame can not play a good role

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