The influence of dislocation on the stress and waterproof performance of #br#
shield tunnel joint
Zhang Wenjun1，2，3 Wang Boda1，2 Zhang Gaole1, 2
1. School of Civil Engineering, Tianjin University, Tianjin 300354, China；2. Key Laboratory of Coast Civil Structure Safety of the Education
Ministry, Tianjin University, Tianjin 300354, China；3. State Key Laboratory of Shield Machine and Boring Technology, Zhengzhou 450001, China
Abstract：In order to study the influence of uneven settlement in soft soil area on the mechanical and waterproof performance of subway tunnel structure,threedimensional segment joint refinement model and two-dimensional gasket seal groove refinement model are established respectively by ABAQUS finite element software. The stress distribution law and segment damage characteristics of the joint under different staggering and opening conditions are analyzed,and the different staggering and opening conditions are discussed. The decrease degree of the waterproof performance of the gasket under the condition of platform quantity. The results show that when the amount of staggering is small, the stress distribution of bolt axis presents a “single peak” form, and the maximum stress of bolt is located near the joint surface of right segment;When the amount of staggering is large,the stress of bolt axis presents a "double peak" form,and the peak stress of bolt is located on both sides of the joint surface;The effect of opening amount on the maximum stress of bolt is small,but it has a greater impact on the stress of bolt middle section,which is along with the opening. The increase of the amount shows the trend of decreasing first and then increasing;Segment concrete damage mainly occurs near bolt holes; Under the most unfavorable conditions,the waterproof performance of the tunnel decreases by 59.0%; When the amount of staggered platform is greater than 6.6mm,the tunnel has not met the waterproof requirements.
张稳军 王博达 张高乐. 错台对盾构隧道接缝受力及防水性能的影响分析[J]. 土木工程学报, 2020, 53(S1): 63-68.
Zhang Wenjun Wang Boda Zhang Gaole. The influence of dislocation on the stress and waterproof performance of #br#
shield tunnel joint. 土木工程学报, 2020, 53(S1): 63-68.
