有限元方法的明挖施工中基坑支撑轴力监测分析
|
摘要
作为基坑监测的重要内容之一,钢支撑的轴力变化可对基坑设计的科学性进行验证,确保明挖施工的顺利进行。以某地铁站为研究对象,对其基坑支撑监测数据进行收集与整理,在此基础上,围绕其基坑开挖环节钢支撑轴力发生的具体变化做出详细分析,同时,建立排桩与钢支撑共同作用的三维整体有限元模型,模拟基坑施工中钢支撑轴力的变化规律。对比结果显示:采用有限元分析法的模拟值与实际监测值较为接近,可为地铁基坑的施工提供一定的理论参考依据。
As an important content of foundation monitoring, steel prop's axial force change can verify pit design's scientificity, and guarantee open-cut construction's succeed. On the basic of a subway station's trench shoring monitoring data, the paper makes an analysis on steel prop's axial force change in foundation pit's excavation process. At the same time, it builds a three dimensional integral finite element model under the combined action of piling and steel prop, to make a simulation of steel prop's axial force change rule. The comparative result shows that, simulation value is close to actual monitoring value, it can provide some reference for subway foundation pit's construction in future.
As an important content of foundation monitoring, steel prop's axial force change can verify pit design's scientificity, and guarantee open-cut construction's succeed. On the basic of a subway station's trench shoring monitoring data, the paper makes an analysis on steel prop's axial force change in foundation pit's excavation process. At the same time, it builds a three dimensional integral finite element model under the combined action of piling and steel prop, to make a simulation of steel prop's axial force change rule. The comparative result shows that, simulation value is close to actual monitoring value, it can provide some reference for subway foundation pit's construction in future.
引文
[1]张明聚,谢小春,吴立.锚索与钢支撑混合支撑体系内力监测分析[J].岩土工程学报,2010,32(z1):483-488.
[2]程宏才,李志军,莫自敏,等.基坑支撑轴力的智能预测预警技术研究[J].2015(5):
[3]王梦恕.中国盾构和掘进机隧道技术现状、存在的问题及发展思路[J].隧道建设(中英文),2014,34(3):179-187.
[4]赵彦庆,张华恺,齐凯泽等.钢支撑在天津某地铁深基坑中的稳定性研究[J].施工技术,2016,45(20):96-100.
[5]白洁,葛杰,雷克.中日基坑钢结构支撑体系对比[J].施工技术,2016,45(1):10-13.
[6]郑刚,邓旭,流畅等.不同围护结构变形模式对抗外深层土体位移场景影响的对比分析[J].岩土工程学报,2014,36(2):273-285.
[7]张哲.基坑混凝土支撑轴力监测数据异常情况分析与探讨[J].隧道建设,2016,36(8):
[8]刘岱熹.地铁深基坑开挖围护结构变形监测与数值模拟研究[D].辽宁科技大学,2016.
[2]程宏才,李志军,莫自敏,等.基坑支撑轴力的智能预测预警技术研究[J].2015(5):
[3]王梦恕.中国盾构和掘进机隧道技术现状、存在的问题及发展思路[J].隧道建设(中英文),2014,34(3):179-187.
[4]赵彦庆,张华恺,齐凯泽等.钢支撑在天津某地铁深基坑中的稳定性研究[J].施工技术,2016,45(20):96-100.
[5]白洁,葛杰,雷克.中日基坑钢结构支撑体系对比[J].施工技术,2016,45(1):10-13.
[6]郑刚,邓旭,流畅等.不同围护结构变形模式对抗外深层土体位移场景影响的对比分析[J].岩土工程学报,2014,36(2):273-285.
[7]张哲.基坑混凝土支撑轴力监测数据异常情况分析与探讨[J].隧道建设,2016,36(8):
[8]刘岱熹.地铁深基坑开挖围护结构变形监测与数值模拟研究[D].辽宁科技大学,2016.