摘要
通过对某穿越湿陷性黄土地层隧道某塌方段地层-结构法和荷载-结构法的数值对比计算分析,表明虽然隧道上方塌陷后原状土体结构遭到破坏,但在围岩与衬砌支护结构变形协调的共同作用过程中,塌陷区黄土围岩的承载潜力仍要考虑到计算中,单纯的荷载结构法计算不能充分反映衬砌支护结构受力、变形的实质,采用地层结构法计算更符合实际情况;同时,根据塌陷段地质情况,采取了地表深孔注浆加固地层的处治方案,通过现场试验分析、论证,表明该处治方案合理、有效,较好地实现了地层加固的目的。
Numerical study and comparison analysis of stratum-structure and load-structure in a collapse area of a tunnel which runs through collapsible loess stratum indicate that loading potentiality of loess surrouding rock in collapse area still needs to be taken into consideration in the interaction of surrouding loess and lining supporting structure. Load-structure analysis fails to fully reflect the real stress and displacement of lining supporting structure, stratum-structure analysis is more suitable for the real situation in this case. Meanwhile, according to the geologic situation of collapse area, deep hole grouting from the ground surface is applied to strengthen the surrounding rocks and collapsing stratum. Site experiment analysis and reasoning justify the rationality and effectiveness of this stratum reinforcement practice.
出处
《公路》
北大核心
2009年第2期205-209,共5页
Highway
关键词
隧道工程
黄土围岩
湿陷
地表塌陷
施工控制
tunnel engineering
loess surrounding rock
collapsibility
surface collapsing
construction control
