珠海某基坑施工监测结果分析及处理措施.pdf

2016 年 11 月上第 45 卷第 21 期施工技术CONSTUCTION TECHNOLOGY103DOI:10.7672/sgjs2016210103珠海某基坑施工监测结果分析及处理措施顾刚1，牛犇2(1 中交珠海城际轨道交通投资建设有限公司，广东 珠海519000;2 中交四航工程研究院有限公司，广东 广州510230)摘要在基坑施工进程中，由于设计、施工工艺本身及周边环境因素的影响，基坑开挖存在不确定因素。这些因素只有通过施工监测才能反映出来。在珠海某工程基坑开挖过程中，测斜数据出现报警，反映基坑顶部不断向内收缩。通过计算分析，指出钢支撑预加力不足是导致地下连续墙水平位移的关键因素，并针对此具体问题提出了处理措施。经方案实施，基坑工况达到稳定，基坑施工可以继续开展。关键词基坑;施工;监测;水平位移;处理措施 中图分类号TU753 文献标识码A 文章编号1002-8498(2016)21-0103-04Construction Monitoring esults Analysis and Treatment Measures ofa Foundation Excavation in ZhuhaiGu Gang1，Niu Ben2(1 CCCC Zhuhai Intercity ailway Investment Construction Co，Ltd，Zhuhai，Guangdong519000，China;2 CCCC Fourth Harbor Engineering Institute Co，Ltd，Guangzhou，Guangdong510230，China)Abstract:According to some factors about the foundation excavation design，construction technique，andthe constructing site environment，many uncertain factors exist during the excavation of the foundationConstruction monitoring is the only way to show these factors upDuring the excavation of somefoundation in the construction of some project，one inclinometer tube alarms continuously，which showsthe top of the foundation excavation is constricting A calculation analysis of the relation between axisforce and concrete diaphragm wall is executed by the calculating software After the calculation，lack ofthe pre-added steel support force is considered to be the key factors Based on the consideration of theexcavation method and strength of the concrete diaphragm wall，measures are put forward on the problemAfter performance of the project plan，top of the foundation excavation stops the constriction and theconstruction continuesKeywords:foundationexcavation;construction;monitoring;horizontaldisplacement;treatment measures作者简介顾刚，中交四航局副总工程师，高级工程师，E-mail:ggang gzpcc com收稿日期2015-10-13;修订日期2015-11-150引言在基坑施工中，施工工艺本身及周边的环境因素(比如重载设备经过)会对基坑产生不同程度的扰动，严重者甚至可能造成基坑各种事故的出现。这些宏观问题，只有通过施工监测才能反映出来，因此，施工监测对于基坑施工起着至关重要的作用。在珠海某基坑施工过程中，某处测斜数据连续报警1-3。该报警情况反映了基坑顶部在不断收缩，基坑施工存在极大的风险，现场施工进度也因此受到了极大制约。本文通过软件计算及现场工况的参