Suzhou rail transit Line 8 smoothly under the Yangcheng Lake

On September 1, suzhou rail transit line 8, 5 blocks economics right wind well interval among road station ~ line smoothly, this is the end of may this year the region of the left line between breakthrough after another important node, mark the line 8 large distances in yangcheng lake task is completed, the distance across the hole through a step closer to, at the same time created a precedent bottom shield mutually parallel construction in suzhou.

Section 5 of Line 8 consists of two stations, four sections and an intermediate air shaft, with a total length of 5.03 kilometers, among which the Jixulu Station to the intermediate air shaft is 1.92 kilometers, located at the junction of Xiangcheng District and Suzhou Industrial Park. The length of the line through Yangcheng Lake is about 1.3 kilometers, and the measured maximum water depth is about 3.9 meters. The minimum distance between the tunnel top and the bottom of the lake is 10.2 meters. The safety risk of underpiercing is high, and the construction is difficult.

"The water system in the Jiangnan area has a unique feature of high sand content, and there is a lack of water-insulating clay layer in some parts. When the shield tunneling machine passes through Yangcheng Lake, it may face the risk of hydraulic penetration and water backpouring." Line 8 5 blocks project deputy director Wu Shao, therefore they transformed in lake of shield machine, strengthened the defense shield machine spewing ability and shield tail seal, also USES the remote video monitoring system and uav patrol, ensure the accurate positioning of shield tunneling, realize the long tunnel into the hole deviation only 1 cm, with "zero risk" completed the double penetration.

It is worth mentioning that in the face of important water source protected area of suzhou yangcheng lake, the project department not only precise control of various technical parameters in construction process, to ensure the shield construction machine in the wear process does not carry on the lake water and soil disturbance and also adopted after living experiments pollution-free special shield tail oil, foaming agent, lubricant, and did not add the inertia of cement slurry, Effectively prevent the construction of Yangcheng Lake water quality and ecological environment caused by the impact.

It is understood that the rail transit line 8 in suzhou high-tech zone west of guangzhou ferry bridge groom stand, in suzhou industrial park station bus lane, full length 35.5 km, total of 28 set station, is the backbone of the ancient city periphery from northwest to southeast, connects the high-tech zone, gusu area, city, industrial park, and many other urban centers, throughout the city more green ecological scenic spot.