Kunming metro line 4 construction and speed up small garden station - north railway station between the right line through

On August 5, it was reported that the construction of kunming metro line 4 was speeding up again. The right line tunnel between xiaocaiyuan station of kunming rail transit line 4 and north railway station was successfully completed by China railway no. 5 bureau. Up to now, 57 of the 60 single lines of line 4 have been connected.

The total length between xiaocaiyuan station and north railway station is 1530 meters, and the maximum depth is 40 meters. The vertical distance between the left and right lines of the interval is only 1.8 meters. The tunnel structure is mainly located in the gravel stratum with high water wealth.

Shield machine "shaoshan 8" on December 1, in the small garden station smooth starting, lines are mainly distributed in the stone railway MiGui segment, from east to west direction advance, successfully through the panlong river, small garden in the overpass, Beijing road tunnel, both the operation of the rail transit line 2, and so on, to achieve the goal of "zero settlement" on the ground, for subsequent small garden station and the train of the left line between BeiZhan District accumulated important experience of shield construction. Among them, the key and difficult project of section overlapping section undercutting the existing rail transit line 2 is one of the key scientific research projects.

Construction process, the project department formulated the plan according to actual condition, the preparation of the shield machine safety wi, formulate special contingency plans, and conduct emergency drills, establishment of emergency rescue team, consists of the accident emergency rescue, technical support, communications, etc. Eight groups to respond to emergencies, the above measures to ensure the safety of the shield machine tunneling smoothly.

Up to now, 28 of 29 stations of kunming metro line 4 have been roofed, and 57 of 60 single lines have been connected. Three shield tunneling machines are working hard underground, and the projects behind tracks laying, mechanical and electrical equipment installation, decoration and fire fighting are advancing with all efforts, and the operation work is in an orderly preparation.