Calculation and Analysis of Pipe Joint Settlement Control in Large Back Silting Immersed Tube Tunnel

The use of the segmental pipe section immersed tunnel suffers from several problems, such as complex construction, weak foundation, great water depth, thickness siltation back on top tube, and difficult settlement control. Based Winkel’s elastic foundation beam theory, a mechanical calculation model is established according to case an inhomogeneous soil layer, force deformation structural system tube are calculated based bridge in Zhuhai example tunnel. results show that derived formula for calculating allowable differential per unit length longitudinally applicable sudden change type stiffness natural aforementioned Zhuhai. relationship between control index related influencing factors analyzed. Hence, stratified ground foundation’s integrated bed coefficient derived, equations deflection curves shear forces solved. A set methods criteria provided, provide significant reference optimization scheme improvement construction process similar projects.