Analyses on junction line construction of Beijing subway

摘要

Because of the requirements of function, there are south line, north line and junction line in Wang-Dong sector of Beijing subway. The minimum space between north line and junction line is 1.5m; it is 5.48m between south line and junction line. Because the space among three tunnels is very little, the construction of three tunnels influences seriously each other. In order to verify the feasibility of construction method, a series of calculation and analyses are carried out by using a 3-D elastic-plastic FEM code, and useful knowledge is obtained.