摘要
研制以石蜡为胶结剂的憎水型流耦合相似材料,制作由高强PVC板和型钢组成的试验架,开发光纤监测系统和渗流量计量器,在此基础上以青岛胶州湾隧道为工程背景开展流固耦合相似材料试验。根据海水深度、开挖面积和覆盖层厚度等条件的不同,进行20种工况的试验,记录涌水量和9个关键点的位移、应力及渗透压力等多元信息。研究结果表明:拱顶以上约15 m岩层内开挖卸载效应明显,在施工中应注意加强支护和监控量测;海底段施工时宜采取有效的注浆加固措施;选择水深较小的线路有利于保证隧道的渗透稳定性;设计者应尽量增加隧道空间利用率,减小开挖面积。
The hydrophobic solid-fluid coupling analogous material that took paraffin as the cementing agent was developed. The test platform composed of high-strength PVC boards and structural steel was manufactured. The optical fiber monitoring system and metering device of water seepage were exploited. Based on these, the fluid-solid coupling model test was carried out with the engineering background of the Kiaochow Bay Subsea Tunnel. Twenty experiments under different working conditions were operated in terms of influencing factors such as the water depth, the excavation area and the overburden thickness. During the test process, water inflow and multi-information like the displacement, stress and seepage pressure of nine key points were recorded. The results show that the effect of excavation unloading is rather obvious within 15 m rock stratum right above tunnel vault, so the relevant supporting structure and monitoring measurement should be strengthened. The effective grouting reinforcement measures are appropriate for submarine segment of the tunnel. Tunnel line with lesser water depth is beneficial to stability of surrounding rock suffered high seepage pressure. In order to decrease excavation area, designers ought to increase tunnel space utilization as much as possible.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第3期983-990,共8页
Journal of Central South University:Science and Technology
基金
国家重点基础研究发展计划(973计划)项目(2013CB036003)
国家自然科学基金资助项目(51109209
51134001
51309222)~~
关键词
海底隧道
流固耦合
相似材料
多元信息
涌水量
subsea tunnel
solid-fluid coupling
analogous material
multi-information
water inflow
