Abstract: Aiming at study the macro and micro laws of the key factors affecting the response of leakage surrounding rock at the joint of shallow submerged shield tunnel,a series of tunnel leakage tests were designed and conducted by altering single state parameters such as leakage location and pressure water head,combined with formation settlement,leakage volume,leakage grading,microscopic and stress analysis.The influence of tunnel leakage on the displacement field and stress field of surrounding rock were discussed.The main conclusions are as follows:(1)With the same pressure water head increment,the shallower the buried depth at the leak joint,the larger the pressure water head increases has a significant effect on the maximum surface settlement,and the surface settlement position is closely related to the leakage point;When the pressure water head increases by 1 times the tunnel diameter,the maximum surface settlement of the arch springing,spandrel and crown leakage increases by 218%,306% and 331% respectively.(2)With the increase of the buried depth at the leak joint,the content of the coarse grain group lost at the end of the leakage stage decreased correspondingly,the content of the fine grain group increased,and the content of the medium grain group was basically unrelated to the leakage location and pressure head during the leakage process.(3) The pore number and average particle size of surface soil samples in tunnel leakage showed a decreasing trend,and the pore number and average pore diameter of soil samples near the leak in the convergence stage increased by 237% and decreased by 52% compared with the initial stage.(4) The pore water pressure and earth pressure of the surrounding rock at the leak location decrease significantly at the initial stage of leakage,which were 59% and 61% of the initial stress level respectively;When the soil leakage converges to form a stable soil arch,the average effective principal stress of the surrounding rock at each leak joint has basically recoveres to the level before the leakage.The proposed test method and research conclusion have established important guiding basis and data support for the restoration of surrounding rock in shallow submerged shield tunnel engineering.