摘要
研究目的:新建铁路广深港客运专线狮子洋隧道下穿珠江主航道,在隧道进口方向穿越珠江大堤下方的不均匀地层时,地面发生大面积塌陷,危及珠江大堤安全,同时盾构机被困,不能正常掘进。为解决此难题,针对该工程的最佳地层加固方案和实验采用50m以上深孔袖阀管注浆工艺进行研究,提出可行办法和措施,保证施工的顺利进行。研究结果:通过研究提出的地层加固方案和深孔袖阀管注浆工艺,解决了深孔袖阀管注浆的"卡、掉芯管"问题;解决了在盾构机前方注浆施工可能发生的"包裹、固结"盾构机的问题。通过注浆改良地层,保证了盾构机施工的正常。
Research purposes：The Shizhiyang tunnel of Guangzhou-Shenzhen-Hong Kong High-speed Railway underpasses through the main channel of the Pearl River.When TBM tunnelled in the uneven stratum near the Pearl River dam in the direction of the tunnel portal,the ground collapse occurred in large scale,endangering the safety of the Pearl River dam.At the same time,TBM could not moved.To resolve this problem,the research was done on choosing the optimal construction scheme and using above 50 m deep long sleeve-valve-pipe to reinforce the stratum.The feasible methods and measures were offered for guaranteeing the construction conducted smoothly.Research conclusions：The stratum reinforcement scheme and the sleeve-valve-pine technology presented in this research could solve the problem that the core of the deep sleeve-valve-pipe was stuck or fallen when grouting and the problem that the TBM was probably packaged when grouting in front of TBM.With improving the stratum by grouting,TBM could work normally.
出处
《铁道工程学报》
EI
北大核心
2010年第7期55-59,共5页
Journal of Railway Engineering Society
关键词
狮子洋隧道
袖阀管注浆
破碎地层
地层加固
Shizhiyang tunnel
sleeve-valve-pipe grouting
the broken stratum
stratum reinforcement
