福建省龙岩市某小区深基坑监测分析.docVIP

福建省龙岩市某小区深基坑监测分析 　　摘要： 福建省龙岩市某小区基坑周围公路及建筑物都相邻较近，基坑采用放坡+锚管（杆）+挂网喷硅护面、排桩+锚索+土钉墙联合支护等支护方案，通过对基坑坡顶水平位移及沉降、深层土体水平位移、临近建筑物沉降进行监测，经监测结果分析显示，本基坑坡顶的最大沉降量、最大水平位移速率，深层土体的最大位移量、 最大位移量速率，临近建筑物的最大沉降量、最大沉降速率，均小于设计规定的最大限值，基坑坡顶的最大沉降速率超过设计规定的最大限值，但经过加固措施，基坑变形趋于稳定。监测成果表明：小区基坑工程监测项目在监测期间，基坑处于稳定状态。监测结果表明，该工程支护方案效果良好，满足设计的要求 Abstract： In a community in Longyan City， Fujian Province， the road and buildings around the foundation pit are adjacent. The foundation pit adopts grading+ anchor pipe+ net-suspended spray silicon crystals and campshed+ anchor rope+ soil nailing wall combined supporting. The monitoring result of foundation pit slope top horizontal displacement and settlement， horizontal displacement of soil， adjacent buildings settlement shows that the maximum subsidence， horizontal displacement rate of the slope crest of the foundation pit， the maximum displacement of deep soil， the maximum displacement rate， the maximum settlement nearby buildings and the maximum subsidence rate are all below the maximum limit value of the specification. The maximum sedimentation rate of foundation pit slope exceeds the design specification， but after taking reinforcement measures， the foundation pit deformation tends to be stable. The monitoring result shows that during the monitoring period of the monitoring items of the foundation pit of the community， the foundation pit is in stable state. It indicates that the supporting scheme of the project has good effect an meet the design requirements. 关键词： 深基坑监测；坡顶水平位移及沉降；深层土体水平位移；深层土体水平位移 Key words： deep foundation pit monitoring；slope crest horizontal displacement and settlement；peep soil horizontal displacement；deep soil horizontal displacement 中图分类号：TU196 文献标识码：A 文章编号：1006-4311（2016）03-0111-04 0 引言 基坑监测作为保证基坑工程安全施工的重要手段，通过对基坑及其周边的建筑物等周边环境进行监测，及时地了解和掌握基坑开挖过程中，基坑边坡及周边建筑物的变化情况，为指导基坑施工及保证基坑和基坑周围建筑物的稳定安全具有重要的意义。本文以福建龙岩市某小区基坑为监测对象，通过对基坑坡顶水平位移及沉降、深层土体水平位移、临近建筑物沉降进行监测，及时的采取、分析及反馈监测信息，以便于及时的调整设计和施工方案，保证基坑开挖的安全，达到动态设计及信息化施工的目的 1 工程概况 拟建小