浅埋暗挖大跨隧道施工环境影响分析  

Analysis of Impact of Construction of Shallow Large-span Tunnels on Environment with Surface Excavation method

作　　者：杨会军[1] 

机构地区：[1]中铁隧道集团有限公司,洛阳471009

出　　处：《铁道工程学报》2010年第5期43-47,共5页Journal of Railway Engineering Society

摘　　要：研究目的:西南风道具有地质条件及周围环境复杂、开挖跨度大(开挖跨度9.9 m)、埋深浅(结构上覆土厚度约10 m)、覆跨比较小(约为1)、路面外荷载作用频繁、穿过地下管线等显著特点。对施工影响范围内环境全面监控量测,评估施工对周边环境的影响。研究结论:(1)通过综合分析确定了最终环境控制标准,制定了周边环境保护措施;(2)地表变形可分为四个阶段:微小变形阶段、剧增变形阶段、缓慢变形阶段、基本稳定阶段;(3)对地面建筑物、地下管线进行安全状态评价,结果显示,全部处于安全状态;(4)浅埋暗挖大跨隧道施工对周边环境的影响是安全可控的。Research purposes： The southwest ventilation tunnel of metro has the following obvious features： complex geological conditions and surrounding environment,large span（excavation span accounting for 9.9 m）,shallow burying（the cover depth of soil on the tunnel structure accounting for about 10 m）,small cover-span ratio（about 1）,frequent external loadings on road surface and under-passing the underground pipelines.So it is necessary to monitor and measure the area impacted by the construction to assess the impact of the construction on surrounding environment.Research conclusions：（1） The final environment control standard is determined and the protection measures for peripheral environment are worked out.（2） The surface deformation can be divided into four stages： micro deformation stage,aggravating deformation stage,slow deformation stage and basically stable stage.（3） The assessments of the safety of the surrounding buildings on the ground and the underground pipelines show that the buildings and underground pipelines are all in safe states.（4） The impact of construction of a shallow large-span tunnel with surface excavation method on surrounding environment is controllable.

关 键 词：浅埋暗挖 地表沉降 建筑物保护 监控量测 环境安全评估 

分 类 号：U455[建筑科学—桥梁与隧道工程]