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内撑式车站基坑开挖变形分析及支撑方案优化研究摘要地铁车站大都位于城市闹区,场地狭窄、周边环境复杂。这就提高了对基坑开挖变形量的控制要求,但是过于强调基坑方案安全性,就可能...
内撑式车站基坑开挖变形分析
及支撑方案优化研究
摘要
地铁车站大都位于城市闹区,场地狭窄、周边环境复杂。这就提高了对基坑开挖变形量的控制要求,但是过于强调基坑方案安全性,就可能会增大不必要的工程造价,如何在深基坑工程做到经济安全的统一,是岩土界人士一直探索的课题。
内撑式是车站基坑方案中常用的支护形式,本文以郑州市黄河东路车站基坑为背景进行了相关的分析和研究,该基坑是我国中部地区具有代表性的工程项目。在总结了以往基坑工程研究成果的基础上,针对基坑开挖过程中的桩体水平位移、周边地表沉降和水平支撑体系内力的现场监测数据进行分析研究,总结出了基坑各部分在开挖中的变形规律,以供类似工程参考。
同时,为了更加全面地了解基坑在开挖过程中整体变形情况,本文利用有限元软件MIDAS/GTS对基坑的开挖过程进行了数值模拟,分析时把土体、围护桩和支撑体系看作一个整体,同时考虑支护结构和土体的相互作用,分析了在不同工况条件下基坑支护体系及周边土体的变形、内力变化情况。通过将计算结果和实测数据进行对比分析,得出采用内支撑支护体系对于该基坑工程是适合的、安全的,该支护形式适合在本地区较深车站基坑工程中应用。
利用有限元方法对基坑方案进行优化分析就是一种有效手段,本文首先利用有限元方法分析了支撑安装位置、支撑水平间距、支撑预加应力三个参数变化对车站基坑开挖过程的影响。最后运用总结出的影响规律,对车站基坑工程支撑体系原设计方案进行了分析和优化。通过与原设计方案的对比分析,得出优化后的设计方案在控制基坑变形和节省工程造价两个方面有较大改善。
关键词:深基坑;基坑监测;数值模拟;支撑系统;优化分析 展开
及支撑方案优化研究
摘要
地铁车站大都位于城市闹区,场地狭窄、周边环境复杂。这就提高了对基坑开挖变形量的控制要求,但是过于强调基坑方案安全性,就可能会增大不必要的工程造价,如何在深基坑工程做到经济安全的统一,是岩土界人士一直探索的课题。
内撑式是车站基坑方案中常用的支护形式,本文以郑州市黄河东路车站基坑为背景进行了相关的分析和研究,该基坑是我国中部地区具有代表性的工程项目。在总结了以往基坑工程研究成果的基础上,针对基坑开挖过程中的桩体水平位移、周边地表沉降和水平支撑体系内力的现场监测数据进行分析研究,总结出了基坑各部分在开挖中的变形规律,以供类似工程参考。
同时,为了更加全面地了解基坑在开挖过程中整体变形情况,本文利用有限元软件MIDAS/GTS对基坑的开挖过程进行了数值模拟,分析时把土体、围护桩和支撑体系看作一个整体,同时考虑支护结构和土体的相互作用,分析了在不同工况条件下基坑支护体系及周边土体的变形、内力变化情况。通过将计算结果和实测数据进行对比分析,得出采用内支撑支护体系对于该基坑工程是适合的、安全的,该支护形式适合在本地区较深车站基坑工程中应用。
利用有限元方法对基坑方案进行优化分析就是一种有效手段,本文首先利用有限元方法分析了支撑安装位置、支撑水平间距、支撑预加应力三个参数变化对车站基坑开挖过程的影响。最后运用总结出的影响规律,对车站基坑工程支撑体系原设计方案进行了分析和优化。通过与原设计方案的对比分析,得出优化后的设计方案在控制基坑变形和节省工程造价两个方面有较大改善。
关键词:深基坑;基坑监测;数值模拟;支撑系统;优化分析 展开
展开全部
地铁车站大都位于城市闹区,场地狭窄、周边环境复杂。
Mostly located in the city downtown subway station, narrow space, the surrounding environment complex.
这就提高了对基坑开挖变形量的控制要求,但是过于强调基坑方案安全性,就可能会增大不必要的工程造价,如何在深基坑工程做到经济安全的统一,是岩土界人士一直探索的课题。
This will improve the deformation of foundation pit excavation of control requirements, but put too much emphasis on excavation scheme secured, likely to increase unnecessary project cost, how in deep foundation pit engineering do economic security unification, is the geotechnical circles has been exploring topic.
内撑式是车站基坑方案中常用的支护形式,本文以郑州市黄河东路车站基坑为背景进行了相关的分析和研究,该基坑是我国中部地区具有代表性的工程项目。
Supports type is the station within the in common use in the foundation pit supporting scheme in zhengzhou city, this paper forms the Yellow River road station for background of foundation pit relative analysis and research, this foundation pit is China's central region is representative of the project.
在总结了以往基坑工程研究成果的基础上,针对基坑开挖过程中的桩体水平位移、周边地表沉降和水平支撑体系内力的现场监测数据进行分析研究,总结出了基坑各部分在开挖中的变形规律,以供类似工程参考。
At the conclusion of the previous excavation engineering, on the basis of research achievements in foundation pit excavation pile in the process of horizontal displacement and ground settlement around and level of support system internal force analysis of site monitoring data, and summarizes the foundation pit excavation of each part deformation law as reference for other similar projects.
同时,为了更加全面地了解基坑在开挖过程中整体变形情况,本文利用有限元软件MIDAS/GTS对基坑的开挖过程进行了数值模拟,分析时把土体、围护桩和支撑体系看作一个整体,同时考虑支护结构和土体的相互作用,分析了在不同工况条件下基坑支护体系及周边土体的变形、内力变化情况。
Meanwhile, in order to more holistic understanding of the foundation pit excavation process deformation in this paper, the finite element analysis software "MIDAS" of foundation pit excavation GTS/is simulated analysis of soil, the retaining piles and supporting system, as a whole, taking into account the supporting structure and the soil, analyzes the interaction of different conditions in foundation pit supporting system and the surrounding soil deformation and internal force change.
通过将计算结果和实测数据进行对比分析,得出采用内支撑支护体系对于该基坑工程是适合的、安全的,该支护形式适合在本地区较深车站基坑工程中应用。
Through the calculated results and measured data by comparison and analysis for the supporting system in support of foundation pit engineering is suitable, security, this support form in this area is suitable for application of deep foundation pit engineering at the station.
利用有限元方法对基坑方案进行优化分析就是一种有效手段,本文首先利用有限元方法分析了支撑安装位置、支撑水平间距、支撑预加应力三个参数变化对车站基坑开挖过程的影响。
Using the finite element method on excavation scheme optimization analysis is a kind of effective method, this paper firstly analyzed using the finite element method support installation position and support, to support the horizontal spacing add stress gets three parameters on the station, the influence of excavation process.
最后运用总结出的影响规律,对车站基坑工程支撑体系原设计方案进行了分析和优化。
Finally using summed up the influence law of foundation pit engineering support system on the original design schemes are analyzed and optimized.
通过与原设计方案的对比分析,得出优化后的设计方案在控制基坑变形和节省工程造价两个方面有较大改善。
Through the comparison with the original design scheme analysis, we can get the optimized design in control the deformation and save project cost two aspects have improved considerably.
深基坑;
Deep foundation pit;
基坑监测;
Foundation excavation monitor;
数值模拟;
Numerical simulation;
支撑系统;
Support system;
优化分析
Optimization analysis
Mostly located in the city downtown subway station, narrow space, the surrounding environment complex.
这就提高了对基坑开挖变形量的控制要求,但是过于强调基坑方案安全性,就可能会增大不必要的工程造价,如何在深基坑工程做到经济安全的统一,是岩土界人士一直探索的课题。
This will improve the deformation of foundation pit excavation of control requirements, but put too much emphasis on excavation scheme secured, likely to increase unnecessary project cost, how in deep foundation pit engineering do economic security unification, is the geotechnical circles has been exploring topic.
内撑式是车站基坑方案中常用的支护形式,本文以郑州市黄河东路车站基坑为背景进行了相关的分析和研究,该基坑是我国中部地区具有代表性的工程项目。
Supports type is the station within the in common use in the foundation pit supporting scheme in zhengzhou city, this paper forms the Yellow River road station for background of foundation pit relative analysis and research, this foundation pit is China's central region is representative of the project.
在总结了以往基坑工程研究成果的基础上,针对基坑开挖过程中的桩体水平位移、周边地表沉降和水平支撑体系内力的现场监测数据进行分析研究,总结出了基坑各部分在开挖中的变形规律,以供类似工程参考。
At the conclusion of the previous excavation engineering, on the basis of research achievements in foundation pit excavation pile in the process of horizontal displacement and ground settlement around and level of support system internal force analysis of site monitoring data, and summarizes the foundation pit excavation of each part deformation law as reference for other similar projects.
同时,为了更加全面地了解基坑在开挖过程中整体变形情况,本文利用有限元软件MIDAS/GTS对基坑的开挖过程进行了数值模拟,分析时把土体、围护桩和支撑体系看作一个整体,同时考虑支护结构和土体的相互作用,分析了在不同工况条件下基坑支护体系及周边土体的变形、内力变化情况。
Meanwhile, in order to more holistic understanding of the foundation pit excavation process deformation in this paper, the finite element analysis software "MIDAS" of foundation pit excavation GTS/is simulated analysis of soil, the retaining piles and supporting system, as a whole, taking into account the supporting structure and the soil, analyzes the interaction of different conditions in foundation pit supporting system and the surrounding soil deformation and internal force change.
通过将计算结果和实测数据进行对比分析,得出采用内支撑支护体系对于该基坑工程是适合的、安全的,该支护形式适合在本地区较深车站基坑工程中应用。
Through the calculated results and measured data by comparison and analysis for the supporting system in support of foundation pit engineering is suitable, security, this support form in this area is suitable for application of deep foundation pit engineering at the station.
利用有限元方法对基坑方案进行优化分析就是一种有效手段,本文首先利用有限元方法分析了支撑安装位置、支撑水平间距、支撑预加应力三个参数变化对车站基坑开挖过程的影响。
Using the finite element method on excavation scheme optimization analysis is a kind of effective method, this paper firstly analyzed using the finite element method support installation position and support, to support the horizontal spacing add stress gets three parameters on the station, the influence of excavation process.
最后运用总结出的影响规律,对车站基坑工程支撑体系原设计方案进行了分析和优化。
Finally using summed up the influence law of foundation pit engineering support system on the original design schemes are analyzed and optimized.
通过与原设计方案的对比分析,得出优化后的设计方案在控制基坑变形和节省工程造价两个方面有较大改善。
Through the comparison with the original design scheme analysis, we can get the optimized design in control the deformation and save project cost two aspects have improved considerably.
深基坑;
Deep foundation pit;
基坑监测;
Foundation excavation monitor;
数值模拟;
Numerical simulation;
支撑系统;
Support system;
优化分析
Optimization analysis
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