Analysis on Water Inrush in Shield Tunnels under Buildings and Corresponding Countermeasures
(1 China Railway First Survey and Design Institute Group Co., Ltd., Xi′an 710043; 2 Shaanxi Provincial Key Laboratory of Railway and Underground Traffic Engineering, Xi′an 710043)
Abstract：
As for the Shadi tunnel on the Guangzhou-Foshan Intercity Railway Ring Line, a water inrush event sud? denly occurred at the tunnel face when the shield passed under the Yongfeng Textile Buildings, resulting in the over-limit of settlement and deformation of the Yongfeng Textile 1# Building above the tunnel. In order to ensure the subsequent tunnel construction and the safety of the above-ground buildings, supplementary survey and hydrological test are carried out timely, by which the causes of the water inrush in the tunnel are identified. While strengthening the monitoring of the ground surface, treatment measures are carried out, such as grouting reinforcement of the deformed building foundation and grouting of the deep rock fissures for water blocking. For the difficult sections without surface grouting conditions, the treatment measures are taken, such as grouting and filling into the chamber, driving under maintaining the pressure. With those measures the water inrush at the tunnel face is effectively reduced, the settlement and deformation of the buildings are controlled, ensuring the shield safely passing through the high-risk Yongfeng Textile Buildings.
LIU Daosheng1,
2
.Analysis on Water Inrush in Shield Tunnels under Buildings and Corresponding Countermeasures[J] MODERN TUNNELLING TECHNOLOGY, 2021,V58(3): 223-228
2021, Vol. 58 