Chongqing Rail Transit Line 17 Phase I Lot 4 · Daxuecheng Zhonglu Station

Project Facts

Key parameters and scope of the project

项目要素 / Key Fact	内容 / Detail
Project Type	Rail Transit · Mined Station (Interchange)
Contract Value	¥67.68 million
Location	Directly beneath Daxuecheng Zhonglu, south of its intersection with Kangcheng Road, Shapingba District, Chongqing
Interchange	Interchange with Daxuecheng Zhonglu Station on Line 15, with one interchange passage
Station Length	Designed length 252.05 m
Platform	14 m island platform, single-arch double-deck structure
Ancillary Structures	3 entrances/exits, 1 interchange passage, 2 ventilation-plant groups, 1 construction adit
Excavation Section	445.07 m² (W 25.04 m × H 21.05 m)
Burial Depth	Crown overburden approx. 13–17 m, of which rock cover approx. 7–13 m — a shallow tunnel
Rock Mass	Interbedded sandstone and mudstone, predominantly mudstone
Major-End Section	Daxuecheng Zhonglu–Pengjiayuanzi running section, 1,586 m, TBM-driven, with a dedicated TBM launch shaft at the major end
Construction Method	Mining method — double-side drift method
Client	Sinohydro Bureau 7 (Sinohydro Engineering Bureau No.7)

Project Detail

Overview · Geology and depth · Construction method and schedule

🔹 Project Overview

252.05 m · 14 m island

1. Location and Interchange

Daxuecheng Zhonglu Station lies directly beneath Daxuecheng Zhonglu on the south side of its intersection with Kangcheng Road, interchanging with Daxuecheng Zhonglu Station on Line 15. The station is 252.05 m long: a 14 m island platform with a single-arch, double-deck structure.

The station has 3 entrances/exits, 1 interchange passage (to Line 15) and 2 ventilation-plant groups, plus 1 construction adit. The major-end running section (Daxuecheng Zhonglu–Pengjiayuanzi) is 1,586 m long and is TBM-driven, with a dedicated TBM launch shaft at the major end.

2. Geology and Burial Depth

The station is shallow-buried. The rock mass is interbedded sandstone and mudstone, predominantly mudstone; the crown overburden is about 13–17 m, of which the rock cover is about 7–13 m — classifying it as a shallow tunnel.

3. Main Structure and Construction Method

The main station is constructed by the mining method using the double-side drift sequence. The station tunnel is 25.04 m wide and 21.05 m high in excavation, with an excavation section area of 445.07 m².