海底隧道堵水限排渗流场及衬砌水压力分布规律研究  

Study on Distribution Law of Seepage Field and Water Pressure on Lining in Subsea Tunnel with Water Blockade and Drainage Limitation

作　　者：陈立保[1] 孙文昊[1] 韩智铭 朱正国[2,3] 韩伟歌 CHEN Libao;SUN Wenhao;HAN Zhiming;ZHU Zhengguo;HAN Weige(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063;Key Laboratory of Roads and Railway Engineering Safety Control(Shijiazhuang Tiedao University),Ministry of Education,Shijiazhuang 050043;Hebei Province Technical Innovation Center of Safe and Effective Mining of Metal Mines,Shijiazhuang 050043)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,石家庄050043 [3]河北省金属矿山安全高效开采技术创新中心,石家庄050043

出　　处：《现代隧道技术》2022年第S01期345-352,共8页Modern Tunnelling Technology

基　　金：国家自然科学基金项目(51978424);中铁第四勘察设计院有限公司科研课题(2019K041)

摘　　要：海底隧道衬砌结构在承担地层荷载的同时还要承担一定的水压力,而适当的排水有助于发挥注浆圈的加固作用,实现衬砌背后水压力有效折减和变形控制,因此“堵水限排”已成为海底隧道防排水设计普遍遵循的设计理念。依托青岛胶州第二海底隧道穿越F2断裂带工程背景,采用FLAC 3D流固耦合方法,对堵水限排条件下围岩渗流场、洞周稳定性和衬砌水压力分布规律开展研究。结果表明,注浆圈可以有效减小开挖对渗流场的影响,随着注浆参数的增强,开挖对孔隙水压力的影响集中于注浆区域且趋于平缓;注浆厚度为5 m,n=0.02时,堵水效果较好且较为经济;排水率增大可以有效降低衬砌水压力,水压力最大值出现在拱脚,在拱脚设置排水孔更利于衬砌结构安全。The subsea tunnel lining bears certain water pressure while bearing the stratum load.Proper drainage helps to reduce the water pressure and deformation of the lining.Therefore,“water blockade and drainage limitation”has become a common design concept in subsea tunnels.Based on the Qingdao-Jiaozhou bay second subsea tunnel,FLAC 3 D fluid solid coupling method is used to study the seepage field,the tunnel stability and the water pressure on lining under the water blockade and drainage restriction.The results show that grouting can effectively reduce the impact of excavation.With the increase of grouting,the impact of excavation on pore water pressure is concentrated in the grouting area and the influence degree tends to be gentle.When the grouting thickness is 5 m,n=0.02,the water blocking effect is better and more economical.The increase of drainage rate can effectively reduce the water pressure of lining.The maximum value of water pressure appears at the arch foot,setting drainage holes there is more conducive to the lining.

关 键 词：海底隧道 堵水限排 渗流场 衬砌水压力 流固耦合 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]