Construction Method of Setting Inclined Ring Joints to Improve Seismic Performance of Shield Segment Structural Joints

Abstract

The invention discloses a construction method for setting inclined annular joints to improve the anti-seismic performance of the structural joints of shield tunneling segments, including several prefabricated shield tunneling segments; the construction steps are as follows: step 1, prefabricating a shield machine; the length of the casing of the shield machine and the The inclination angle of each prefabricated shield segment is matched with the extension direction of the underground shield tunnel; step 2, splicing the first ring of prefabricated shield segments; step 3, splicing the next ring of prefabricated shield segments; the next ring The prefabricated shield segment and the existing prefabricated shield segment are staggered at a certain angle to achieve longitudinal staggered joints, and an elliptical inclined circular joint is formed at the splicing surface; step 4, perform subsequent segment splicing; the shield continues to excavate, and the execution is repeated Step 3, complete the assembly of all prefabricated shield segments, and finally form a complete tunnel structure. The application of the invention can improve the shearing resistance of the shield tunnel under the action of vertical earthquake, and further improve the seismic safety performance of the shield tunnel.

Description

technical field [0001] The invention relates to the technical field of underground building construction, in particular to a construction method for setting inclined annular joints to improve the seismic performance of structural joints of shield tunnel segments. Background technique [0002] With the development of urban underground space, the shield method, as a safe, reliable and efficient construction method, has been more and more widely used. In high-intensity earthquake-prone strata, shield tunnels must inevitably withstand the test of strong earthquakes. Under the action of earthquake loads, shield tunnels are prone to severe shear deformation damage, resulting in huge economic losses. The seismic safety of shield tunnels in high-intensity earthquake-prone areas has become an important issue that needs to be solved urgently in the field of underground engineering. [0003] In the prior art, the shield tunnel is longitudinally assembled from a ring of segments, and ...

AI Technical Summary

Problems solved by technology

Under the action of the vertical seismic load, the segments on both sides of the annular joint undergo vertical relative deformation, and the joints of the connecting bolts are prone to shear failure, which affects the normal operation of the tunnel as a whole and even causes major loss of life and property

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