Study on model test for static mechanical behavior of tunnel segment lining structure with large-section shield tunnel and high water pressure

Based on the Wuhan Yangtze River shield tunnel,model test of segment lining structure with different water and earth pressure is fulfilled combined shield tunnel-ground complex simulation facility with rotary water pressure device.At last,the paper analyzes on the test results of static mechanical behavior characteristics of shield segment of the tunnel lining.The analysis shows:(1) nine uniform blocks are superior to nine add one uniform bocks in mechanical properties;(2) the 180° stagger joint assembling method is preferred in the project;(3) for the large broad segment,the central place is less affected by the bolts shear force than the edge.