To enhance the waterproofing performance of joint gaps in large rectangular jacked tunnels,this study took the underground passage of Putian Railway Station in Fujian Province as an example,and introduced a new type of elastic sealing gasket with embedded steel plate.By using the finite element analysis software ABAQUS,the waterproofing performance of three scenarios was comparatively analyzed:an elastic seal without embedded steel plates(Case 1),an elastic rubber gasket with a single layer of embedded steel plates(Case 2),and an elastic rubber gasket with double layers of embedded steel plates(Case 3),under varying degrees of joint gap openings and misalignments.The findings reveal:(1)Without any misalignment,the waterproofing performance of both Case 2 and Case 3 surpasses that of Case 1,except for when the opening of Test Line 1 is between 0 mm and 2.4 mm,and that of Test Line 2 is between 0 mm and 5 mm,where Case 3 outperforms Case 2.(2)Under applied misalignments,except for when Test Line 1 experiences a misalignment of 6 mm with openings between 0 mm and 2.3 mm and 6.2 mm to 9.9 mm,and misalignment of 12 mm with openings between 1.6 mm and 2.8 mm,where Case 2 shows inferior waterproofing compared to Case 1,Case 2 and Case 3 generally demonstrate better waterproofing than Case 1.Among these,except for the similarity in waterproofing performance between Case 3 and Case 2 at Test Line 2 under a 6 mm misalignment,Case 3 exhibits the best waterproofing across other test lines.Overall,Case 3 demonstrates the most favorable waterproofing performance.These results provide a reference for waterproofing measures in tunnel joints.
jacked tunnelnovel elastic sealing gasketwaterproof performancejoint misalignmentjoint gap opening
万方数据
维普
