摘要
广佛环线城际铁路沙堤隧道盾构下穿通过永丰纺织楼时掌子面突发涌水,并导致隧道上方永丰纺织1#楼沉降变形超限。为确保隧道后续施工及地面房屋安全,及时开展补充勘察及水文测试,查明了隧道涌水原因。在加强地表监测的同时,通过对变形房屋基础采取注浆加固、深层岩石裂隙注浆堵水等处理措施,同时在地表无注浆条件的困难地段,在盾构隧道内采取填舱压浆、保压掘进的措施,有效减少了掌子面前方来水,抑制了房屋的沉降变形,确保了盾构安全通过永丰纺织楼高风险段。
As for the Shadi tunnel on the Guangzhou-Foshan Intercity Railway Ring Line,a water inrush event suddenly 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.
作者
刘道胜
LIU Daosheng(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi′an 710043;Shaanxi Provincial Key Laboratory of Railway and Underground Traffic Engineering,Xi′an 710043)
出处
《现代隧道技术》
CSCD
北大核心
2021年第3期223-228,共6页
Modern Tunnelling Technology
基金
中铁一院科研项目(12-07)。
关键词
城际铁路
盾构隧道
涌水
处理对策
沉降变形
深层裂隙
填舱压浆
Intercity railway
Shield tunnel
Water inrush
Treatment measures
Settlement and deformation
Deep fissure
Grouting and filling into chamber
