摘要
以青岛地铁2号线枣山路车站为例,采用数值分析结合现场监测,揭示了施工过程中的结构及围岩变形规律,并在此基础上进行拱盖法车站拱部双侧壁及CD法的工法分析。研究表明,两种工法的地层变形均小于控制值,且围岩均未发生整体沉降,但CD法施工时地层变形更大,应力重分布更充分,可以充分发挥围岩自承载能力,降低支护成本的同时也可提高施工工效。研究成果适用于在"上软下硬"地层中设计施工的拱盖法暗挖车站,可为类似工程提供借鉴。
With the Zaoshan Road Station of Line 2 of Qingdao Metro as a practical example,the deformation laws of the s truc-ture and the surrounding rock in the course of construction are exposed in the paper by the numerical analysis in combination with the site tests,upon the basis of which an analysis is made of the construction methods of the Dual-Side-Drift Method and the CD Method for the arch-down subway station. The result of our reasearch shows that , with either of the two construction methods adopted for the project,it is found that the value of the deformation of the stratum is less than the control value and no overall settlement of the surrounding rock happens. However^there will be greater deformation in the stratum and more suffi-cient stress redistribution when the CD method is adopted for the project,in which case full play can be given to the self-bearing capacity of the surrounding rock,as a result of which the cost of supporting may be reduced and meanwhile,the construction ef-ficiency may be improved. The result of our research may be applied to the design and construction of other undercut arch-down stations in the stratum of being soft in the upper part and hard in the lower part. The paper may also serve as a useful reference for other similar projects.
出处
《国防交通工程与技术》
2017年第4期27-31,共5页
Traffic Engineering and Technology for National Defence
关键词
土岩组合地层
拱盖法
双侧壁导坑法
CD法
拱顶沉降
地表沉降
soil-rock composite s tra tum
arch-down method
double-side-drift method
CD method
settlement of the crown
set-tlement of the ground surface
