Study on Station Position Scheme of Urban Rail Transit Undercrossing High-speed Railway Line.

Where an urban rail transit line is connected to the passenger transport hub of a high-speed rail, it usually underpasses the high-speed railway, and the research process is complicated and the technical requirement is high. The reasonable selection of rail transit station is the basis and key point of the project research. Taking Xi'an Metro Line 1 connecting with Qindu High-speed Railway Station as an example, this paper summarizes the research concepts and methods of the route scheme of urban rail transit connecting with high-speed railway in view of such factors as connecting and transferring function, difficulty of passing under high-speed railway, passenger flow benefit, line technical conditions, influence degree of construction and settlement of high-speed railway subgrade. By comparing the location characteristics of Line 1 connecting with Qindu High-speed Railway station along Xianping Road, Caihong Second Road and Xiandao Road, and analyzing in detail the conditions of connection and transfer, planning compliance, passenger flow benefit, operation conditions and construction risks, laying tracks along Caihong Second Road is recommended. This section adopts shield tunneling method to underpass the high railway subgrade. Baoquan Road station and Qindu station at both ends of the section are underground stations with three floors. The length of the underpass section is 672 m, and the angle of intersection with the HSR plane is about 93°. The vault of line 1 tunnel is about 3. 235 m away from the bottom of CFG pile of high-speed railway. Midas GTS-NX three-dimensional finite element software simulation shows that the maximum vertical settlement of high-speed railway bed is 8.68 mm, the longitudinal and transverse displacement of track bed is 0. 20 mm and 0. 44 mm respectively, meeting the requirements of settlement control. [ABSTRACT FROM AUTHOR]