In order to explore the effect of various influencing factors of shield tunnel undercrossing single pile,taking the settlement and horizontal displacement of pile top as evaluation index,the effect degree of main factors of shield tunnel undercrossing single pile were discussed by orthogonal test and numerical simulation method,and the effect of pile top load was considered.The most important influencing factor was further analyzed.Considering the different bearing behavior of pile,the different settlements of pile top of frictional pile and end-bearing pile caused by shield tunnel were analyzed when the net distance from pile end to tunnel vault changes.The results showed that the horizontal distance between the pile axis and the tunnel axis is the most important factor.With the increase of the horizontal distance between the pile and tunnel,the settlement of the pile top decreases gradually,while the hor-izontal displacement of pile top increases first and then decreases.When the distance between the pile and tunnel reaches 2D,the horizontal displacement of pile top reaches the maximum value.When the clear distance between the pile end and the tunnel vault is less than 3 m,with the decrease of the vertical clear distance,the settlement in-crements of the pile top of the end-bearing single pile is more obvious than that of the frictional single pile,and the mutation occurs.
关键词
盾构隧道/下穿单桩/影响因素/正交试验/数值模拟
Key words
Shield tunnel/Undercrossing the single pile/Influencing factors/Orthogonal test/Numerical simulation
维普
万方数据