Strategic Study of CAE >> 2011, Volume 13, Issue 3
The security monitoring and controlled drainage of Xiamen Subsea Tunnel
1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
2. Road Management Bureau of Henan Province Communication and Transport Department, Zhengzhou 450052, China
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Abstract
Controlled drainage should be applied to deal with underground water in subsea tunnel. In order to study the change laws of subsea tunnel wall rock pressure, water pressure on primary support and internal force of steel arching in the process of construction, combining with the Xiamen Subsea Tunnel, the real time monitor of the wall rock pressure, water pressure on primary support and internal force of steel arching were carried out on site in the process of construction. The results show that the primary support has a high security coefficient in construction period. Grouting in advance and grouting back the primary support is necessary for subsea tunnel. In the circumstance of controlled drainage, by strengthening some measures such as grouting, the water pressure on primary support can be reduced to 1/3 of the full hydrostatic pore pressure. By monitoring and analyzing the water inflow on site, the water inflow controlling criteria are put forward. The water inflow in soft rock section in Xiamen Subsea Tunnel should be less than 0.25 m3/(m·d). The result of the paper were verified and applied in Xiamen Subsea Tunnel.
Keywords
Xiamen Subsea Tunnel ; controlled drainage ; construction monitoring ; water pressure ; water inflow
References
[ 1 ] 瞿守信.厦门翔安海底隧道修建技术初论[J].中国工程科学,2009,11(7):24-29. link1
[ 2 ] 罗先钰,曾洪贤.青岛海底隧道F_3断裂分析评价[J].铁道勘察,2006(5):61-64. link1
[ 3 ] 谭忠盛,王梦恕,罗时祥.琼州海峡铁路隧道方案初步比选分析[J].中国工程科学,2009,11(7):39-44. link1
[ 4 ] 王秀英.山岭隧道堵水限排衬砌外水压力及结构设计研究[D].北京:北京交通大学,2005.
[ 5 ] 王秀英,谭忠盛,王梦恕,等.厦门海底隧道结构防排水原则研究[J].岩石力学与工程学报,2007,26(Z2):3810-3815. link1
[ 6 ] Kitamura A.Technical development for the Seikan tunnel [ J ] . Tunnelling and Underground Space Technology, 1986 , 1 ( 3 /4 ) : 341 -349. link1
[ 7 ] Dahlots, Nilson B.Stability and rock cover of hard rock subsea tunnels [ J ] . Tunnelling and Underground Space Technology, 1994 , 9 ( 2 ) :145 -150. link1
[ 8 ] BearJ.地下水水力学[M].许涓明,译.北京:地质出版社,1985.
[ 9 ] 潘永亮.复变函数[M].北京:科学出版社,2004.
[10] JTGD70-2004.公路隧道设计规范[S].北京:人民交通出版社,2004.