多支点基坑支护结构分步开挖的应用研究
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摘要
深基坑支护工程是当前工程建设领域的热点和难点问题之一,国内外很多工程技术人员和研究者对此做了大量的工作,但对深基坑多支点支护问题的研究和分析大多没有考虑开挖过程,基本是假定内支撑在基坑开挖前就存在,没有考虑开挖过程中支撑反力和结构变形等因素的变化和影响,这种分析与实际的施工过程差距比较大,容易造成工程事故或工程浪费。
本文在前人研究的基础上,采用数值模拟和分析的方法,应用有限元PLAXIS分析软件对深基坑地下连续墙多点支撑支护工程分步开挖过程进行动态模拟分析,充分考虑支撑反力和结构变形等随基坑开挖过程的变化。
在理论分析的基础上,利用PLAXIS有限元程序对浦钢搬迁工程冲渣沟深基坑支护工程分步开挖进行了模拟计算,并与施工过程中实际监测的数据进行对比,验证了本文所采用的动态化施工分析方法及PLAXIS程序的可靠性和实用性,对深基坑地下连续墙多点支撑支护工程的设计与施工具有较好的指导意义。
Deep excavation engineering construction area is one of the hot and difficult issue at present and many domestic and foreign engineers and researchers have done a lot of work on it. However, these people gave little consideration to in deep foundation pit supporting the fulcrum than study and analysis of most problems during excavation. They do not consider the basic assumeption supported in foundation pit excavation in existence before. Because they gave little consideration to the changes and influence caused by supporting force and deformation of the structure during the excavation, there will be wide gap between this kind of analysis and actual construction process and it is more likely to bring about engineering accident or waste.
In this paper, on the basis of predecessors' research on numerical simulation and analysis method of finite element analysis software, PLAXIS of underground continuous wall of deep foundation pit excavation and supporting project supported by more dynamic simulation analysis, we should give full consideration to the process of support force and the structural deformation with excavation process of change.
On the basis of theoretical analysis, PLAXIS using finite element program PuGang relocation project of deep foundation ditch cinder bracing engineering by simulated calculation, by comparing with the excavation and construction process monitoring data, this paper has verified the use of the dynamic construction methods of analysis and PLAXIS program of reliability and practicability will play an instructional role to engineering design and construction of deep foundation pit bracing multi-point supported of underground continuous wall..
本文在前人研究的基础上,采用数值模拟和分析的方法,应用有限元PLAXIS分析软件对深基坑地下连续墙多点支撑支护工程分步开挖过程进行动态模拟分析,充分考虑支撑反力和结构变形等随基坑开挖过程的变化。
在理论分析的基础上,利用PLAXIS有限元程序对浦钢搬迁工程冲渣沟深基坑支护工程分步开挖进行了模拟计算,并与施工过程中实际监测的数据进行对比,验证了本文所采用的动态化施工分析方法及PLAXIS程序的可靠性和实用性,对深基坑地下连续墙多点支撑支护工程的设计与施工具有较好的指导意义。
Deep excavation engineering construction area is one of the hot and difficult issue at present and many domestic and foreign engineers and researchers have done a lot of work on it. However, these people gave little consideration to in deep foundation pit supporting the fulcrum than study and analysis of most problems during excavation. They do not consider the basic assumeption supported in foundation pit excavation in existence before. Because they gave little consideration to the changes and influence caused by supporting force and deformation of the structure during the excavation, there will be wide gap between this kind of analysis and actual construction process and it is more likely to bring about engineering accident or waste.
In this paper, on the basis of predecessors' research on numerical simulation and analysis method of finite element analysis software, PLAXIS of underground continuous wall of deep foundation pit excavation and supporting project supported by more dynamic simulation analysis, we should give full consideration to the process of support force and the structural deformation with excavation process of change.
On the basis of theoretical analysis, PLAXIS using finite element program PuGang relocation project of deep foundation ditch cinder bracing engineering by simulated calculation, by comparing with the excavation and construction process monitoring data, this paper has verified the use of the dynamic construction methods of analysis and PLAXIS program of reliability and practicability will play an instructional role to engineering design and construction of deep foundation pit bracing multi-point supported of underground continuous wall..
引文
[1]谭幽燕,陈维.深基坑支护结构的设计与讨论[J].工业建筑.1998,9：14-17
[2]俞建霖,赵荣欣,龚晓南.软土地基基坑开挖地表沉降量的数值研究[J].浙江大学学报(自然科学版).1998,32(1)：95-101
[3]朱彦鹏、王秀丽、于劲、王志豪.有限元法在深基坑支护中的应用[J].甘肃工业大学学报.2002,9：86-88
[4]张明中、李江.不同支护形式在北京西环广场基坑工程中的应用[J].探矿工程(岩土钻掘工程),2003(增刊)：61-63
[5]潘培强.地铁深基坑施工中支护结构监测分析[J].湘潭大学自然科学学报.2004,4：105-108
[6]郑官塘.福州地区内撑式地下连续墙基坑支护的应用研究与实践[D].重庆：重庆大学,2007
[7]华南理工大学、东南大学等.地基与基础[M].北京：中国工业建筑出版社,1998
[8]赵锡宏等.大型超深基坑工程实践与理论[M].北京：人民交通出版社,2005
[9]蔡智云.深基坑地下连续墙减小邻近建筑沉降的作用研究[D].西安：西安科技大学,2005
[10]陈忠汉,程丽萍编著.深基坑工程[M].北京：中国建筑工业出版社,1997
[1l]谭跃虎.软土深基坑支护结构与土相互作用研究[D].工程兵工程学院
[12]龚晓南.土塑性力学[M].杭州：浙江大学出版社,1997
[13]Chang Yu,Wu Tzong-shinnu. Three-dimensional finite element analysis of deep excavation[J].JGeotechEngrg,1996,5:336-345
[14]秦四清.深基坑工程优化设计[M].北京：地震出版社,1998
[15]杨光华.深基坑支护结构的实用计算方法及其应用[M].北京：地震出版社,2004
[16]赵志缙编制.高层建筑基础工程施工[M].北京：中国建筑工业出版社,1986
[17]杨光华.地下连续墙的入土深度问题.第六届全国土力学与基础工程学术会议论文集.上海：同济大学出版社,1991,6
[18]齐良锋.水泥土挡墙压顶梁对基坑变形影响研究[J].岩土力学,2004,1:88-92
[19]Poulos,H.G. and Davis, E. H.,Pile Foundation Analysis and Design,John wiley and sons,Inc.,1980
[20]张鸿勋等.深基础施工环梁支撑技术[J].施工技术,1995,2：78-82
[21]杨光华.深基坑支护及挡土结构中的新的主动和被动土压力理论[J].北京：宇航 出版社,1994
[22]蔡伟铭.多支撑挡土结构考虑开挖过程的计算方法[J].建筑结构,1996,7：15-25
[23]魏汝龙.开挖卸载与被动土压力计算[J]岩土工程学报,1997,6：88-92
[24]王小明,黄启宇.成都地区深基坑支护的几种主要方法[J].建筑施工,1998,1：89-92
[25]王焕定,吴德伦.有限单元法及计算程序[M].北京：中国建筑工业出版社,2001
[26]王勖成,邵敏.有限单元法基本原理和数值方法[M].北京：清华大学出版社,1998
[27]许宏发,吴华杰,郭少平.桩土接触面单元参数分析.探矿工程.2002年第五期
[28]贾亚.疏桩基础的受力性状分析[D].重庆：重庆大学硕士论文2006年5月
[29]Brown P T and Wiesner T J. The Behavior of Piled Strip Footing Subjected to Concentrated Loads, Australian Gemechanics J.1975. G6:1-5
[30]钟光璐,赵冬.有限元法及程序设计[M].西安：陕西科学技术出版社,1997
[31]蒋友谅.有限元法基础[M].北京：国防工业出版社,1980
[32]罗蓓.基于PLAXIS的地基沉降计算及相关参数分析[J].长沙：湖南交通科技.2009,3：29-32
[33]王江宏,王春波,卢广宁.PLAXIS在深基坑开挖与支护数值模拟中的应用[J].山西建筑,2007,35：94-95
[34]唐晓松,郑颖人,邬爱清等.应用PLAXIS有限元程序进行渗流作用下的边坡稳定性分析[J].长江科学院院报,2006,4：30-31.
[35]王和平.深基坑土钉支护结构设计方法及分步开挖的有限元分析[D].长沙：中南大学,2007
[36]Hashash.Ground Movement Predicition of Deep Excavation in Soft Clay [J] Journal of Geotechnical Engineering 1996,6:738-741
[37]Paice.Finite Element Modeling of Settlements on Spatially Random Soil [J].Journal of Geotechnical Engineering 1996,9:777-779
[38]陈军.深基坑支护工程的设计、施工与监测[J].湖南大学学报(自然科学版).2002,3：117-121
[39]李永盛.深基坑围护结构的变形稳定与对相邻建筑的影响[J].建筑施工,1994, 4：65-68
[40]赵锡宏等.大型超深基坑工程实践与理论[J].北京：人民交通出版社,2003
[2]俞建霖,赵荣欣,龚晓南.软土地基基坑开挖地表沉降量的数值研究[J].浙江大学学报(自然科学版).1998,32(1)：95-101
[3]朱彦鹏、王秀丽、于劲、王志豪.有限元法在深基坑支护中的应用[J].甘肃工业大学学报.2002,9：86-88
[4]张明中、李江.不同支护形式在北京西环广场基坑工程中的应用[J].探矿工程(岩土钻掘工程),2003(增刊)：61-63
[5]潘培强.地铁深基坑施工中支护结构监测分析[J].湘潭大学自然科学学报.2004,4：105-108
[6]郑官塘.福州地区内撑式地下连续墙基坑支护的应用研究与实践[D].重庆：重庆大学,2007
[7]华南理工大学、东南大学等.地基与基础[M].北京：中国工业建筑出版社,1998
[8]赵锡宏等.大型超深基坑工程实践与理论[M].北京：人民交通出版社,2005
[9]蔡智云.深基坑地下连续墙减小邻近建筑沉降的作用研究[D].西安：西安科技大学,2005
[10]陈忠汉,程丽萍编著.深基坑工程[M].北京：中国建筑工业出版社,1997
[1l]谭跃虎.软土深基坑支护结构与土相互作用研究[D].工程兵工程学院
[12]龚晓南.土塑性力学[M].杭州：浙江大学出版社,1997
[13]Chang Yu,Wu Tzong-shinnu. Three-dimensional finite element analysis of deep excavation[J].JGeotechEngrg,1996,5:336-345
[14]秦四清.深基坑工程优化设计[M].北京：地震出版社,1998
[15]杨光华.深基坑支护结构的实用计算方法及其应用[M].北京：地震出版社,2004
[16]赵志缙编制.高层建筑基础工程施工[M].北京：中国建筑工业出版社,1986
[17]杨光华.地下连续墙的入土深度问题.第六届全国土力学与基础工程学术会议论文集.上海：同济大学出版社,1991,6
[18]齐良锋.水泥土挡墙压顶梁对基坑变形影响研究[J].岩土力学,2004,1:88-92
[19]Poulos,H.G. and Davis, E. H.,Pile Foundation Analysis and Design,John wiley and sons,Inc.,1980
[20]张鸿勋等.深基础施工环梁支撑技术[J].施工技术,1995,2：78-82
[21]杨光华.深基坑支护及挡土结构中的新的主动和被动土压力理论[J].北京：宇航 出版社,1994
[22]蔡伟铭.多支撑挡土结构考虑开挖过程的计算方法[J].建筑结构,1996,7：15-25
[23]魏汝龙.开挖卸载与被动土压力计算[J]岩土工程学报,1997,6：88-92
[24]王小明,黄启宇.成都地区深基坑支护的几种主要方法[J].建筑施工,1998,1：89-92
[25]王焕定,吴德伦.有限单元法及计算程序[M].北京：中国建筑工业出版社,2001
[26]王勖成,邵敏.有限单元法基本原理和数值方法[M].北京：清华大学出版社,1998
[27]许宏发,吴华杰,郭少平.桩土接触面单元参数分析.探矿工程.2002年第五期
[28]贾亚.疏桩基础的受力性状分析[D].重庆：重庆大学硕士论文2006年5月
[29]Brown P T and Wiesner T J. The Behavior of Piled Strip Footing Subjected to Concentrated Loads, Australian Gemechanics J.1975. G6:1-5
[30]钟光璐,赵冬.有限元法及程序设计[M].西安：陕西科学技术出版社,1997
[31]蒋友谅.有限元法基础[M].北京：国防工业出版社,1980
[32]罗蓓.基于PLAXIS的地基沉降计算及相关参数分析[J].长沙：湖南交通科技.2009,3：29-32
[33]王江宏,王春波,卢广宁.PLAXIS在深基坑开挖与支护数值模拟中的应用[J].山西建筑,2007,35：94-95
[34]唐晓松,郑颖人,邬爱清等.应用PLAXIS有限元程序进行渗流作用下的边坡稳定性分析[J].长江科学院院报,2006,4：30-31.
[35]王和平.深基坑土钉支护结构设计方法及分步开挖的有限元分析[D].长沙：中南大学,2007
[36]Hashash.Ground Movement Predicition of Deep Excavation in Soft Clay [J] Journal of Geotechnical Engineering 1996,6:738-741
[37]Paice.Finite Element Modeling of Settlements on Spatially Random Soil [J].Journal of Geotechnical Engineering 1996,9:777-779
[38]陈军.深基坑支护工程的设计、施工与监测[J].湖南大学学报(自然科学版).2002,3：117-121
[39]李永盛.深基坑围护结构的变形稳定与对相邻建筑的影响[J].建筑施工,1994, 4：65-68
[40]赵锡宏等.大型超深基坑工程实践与理论[J].北京：人民交通出版社,2003