Research on Deformation of Segment Lining Joint of Highway Tunnel with High Water Pressure and Super-large Diameter Shield Method
Based on the Jiangyin Jingjiang Yangtze River Tunnel Project,combined with the whole ring prototype test and three-dimensional refined numerical simulation,the deformation law of water and soil pressure on the joints of super-large diameter through-seam segments are explored in the paper.The results show that when the capping block is located at the vault,the maximum deformation and maximum opening of the segment joint are located at the outer and inner joints of the vault,respectively;the deformation of the outer joint of the segment increases with the increase of water pressure,while the closure speed of the inner joint of the segment decreases with the increase of water pressure;with the gradual increase of earth pressure,the inner joint of the segment is always opened before the outer joint;when the ratio of earth pressure to water pressure is less than 0.5,the inner joint of vault and arch bottom is always in an open state;when the ratio of earth pressure to water pressure is greater than 3,the outer joint of arch shoulder and arch foot is always open;when the ratio of the two is greater than 4,the lateral joint of the arch waist is always in an open state.
highway tunnelshield methodsegment jointhigh water pressurelarge buried depthnumerical simulationprototype test
NETL
NSTL
万方数据
