%0 Journal Article %A JIN Yue-lang %A DING Wen-qi %A JIANG Hong %A WEI Yu-liang %A GONG Chen-jie %T Test on Ultimate Bearing Capacity of Segment Joint in Shield Tunnel with Large Rectangular Cross-section %D 2017 %R %J China Journal of Highway and Transport %P 143-148,155 %V 30 %N 8 %X In order to investigate the mechanical behaviors and ultimate bearing capacity and ultimate failure state of the segment joint in a shield tunnel with large rectangular cross-section, the ultimate flexural capacity test of the joint was carried out. The test was conducted in the test loading system for the segment joint of shield tunnel which was developed by Tongji university, and the Datataker data acquisition system was used to record the mechanical property changing processes of the joint specimen under loading. Meanwhile, the failure process of the joint was collected and the final failure form was recorded. By analyzing the changes of the joint rotational angle, the deflection of the joint and the stress of bolts with the bending moment load, the change of mechanical behaviors of the joint structure and the whole process of damage were explored. It was divided into three stages:elastic stage (bending moment was less than 450 kN·m), plastic development stage (bending moment was in the range of 450-800 kN·m) and yield failure stage (bending moment was larger than 800 kN·m). The results show that the yield bending moment of the joint used in this shield tunnel with large-section rectangular is 800 kN·m and the ultimate bearing capacity is 884 kN·m, much larger than design load (534 kN·m). It means that the tested joint specimen can meet the requirements of flexural design and provides a reference for the similar projects.The final failure pattern of the joint specimen shows that, except the compressive yielding of concrete and tensile yielding of bolts in the conventional test on the segment joint in circular shield tunnels, there is a new failure mode of the segment joint-the crack of joint box and the failure of anchor bars. %U http://zgglxb.chd.edu.cn/EN/abstract/article_2597.shtml