常州区域地铁施工对地下管线安全性影响的评定方法

Safety Evaluation Method on Pipelines Influenced by Subway Construction in Changzhou

目前中国范围内都在大力推进城市地铁项目的建设,地铁建设的施工中不可避免的会对周围的地下管线产生扰动。地下管线变形主要是管土相互作用的结果,当管线所处的周围土层出现扰动,尤其产生不均匀沉降时,管线由于刚度远远高于周围土层,管线与土层的变形不相协调,应力应变就随之而产生。因此,管线的变形与管线周围土层的扰动情况有着密不可分的关系。结合常州区域管线的具体情况,确定出安全性判定标准,提出地下管线安全性评定简化计算方法,并结合实际案例对常州地铁1号线施工影响下的管线进行安全性分析。

Nowadays the construction of subway has been propelled in cities all over the country,in the construction of subway,the disturbance on surrounding pipelines is inevitable.The transformation of pipelines,the produce of stress and strain is the consequence of interaction between pipelines and soil,when the soil layer surrounding pipelines is disturbed,especially generate differential settlement,for the rigidity of pipeline is much bigger than the soil s,the deformation of pipeline and soil layer will be out of tune,the stress and strain in the pipeline will produce.So the deformation of pipeline is germane to the disturbance of surrounding soil layer.The situation of pipeline in Changzhou and the safety control standard was combined,the safety evaluation method on pipelines influenced by subway construction was put forward,then integrated actual project,conduct safety was analyzed on the pipelines influenced by the construction of the first subway in Changzhou.