通用管片接头荷载试验研究

Load Test on Typical Segment Joints

隧道衬砌圆环接头对管片的整体刚度、强度和防水等起着控制作用,同时也是管片整体结构的薄弱处.采用直接头形式对衬砌接头进行正、负弯矩荷载试验,得到隧道管片通缝和错缝拼装情况下接头的抗弯性能M-θ曲线、接头转角及张开量等,研究通用管片接头的抗弯能力和刚度系数,验证了设计的可靠性.

The joint of tunnel＇ s lining rings is critical to stiffness, strength and water-tightness of the integrated segments, and is the weakest point in the integral structure of segmental lining. This paper describes the tests on lining joints in straight contact under positive and negative loads of bending moments. We obtain and plot the M-θ curves, featuring and through contacts, together with angular deviation buckling capacity and coefficient of stiffness of a typical buckling characteristics of joints of both staggered and opening of joint. This enables a study on segment in order to verify reliability of its design.