厦门滨海复杂地层环境下深基坑施工变形分析
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- 英文论文题名：Analysis on deformation of long and large foundation pit under the environment of coastal complex formation in xiamen
- 论文作者：徐树军
- 英文论文作者：Xu Shujun ; China railway 14th Construction Bureau Co. ; Ltd.
- 年：2016
- 作者机构：中铁十四局集团有限公司;
- 论文关键词：滨海复杂地层 ; 深基坑 ; 变形分析
- 英文论文关键词：Coastal complex stratum ; Long and deep foundation pit ; Deformation analysis
- 会议召开时间：2016-09-26
- 会议录名称：中国土木工程学会2016年学术年会论文集
- 语种：中文
- 分类号：U231.3
- 学会代码：OGTY
- 会议名称：中国土木工程学会2016年学术年会
- 会议地点：中国北京
- 主办单位：中国土木工程学会
- 学会名称：中国土木工程学会
- 页数：14
- 文件大小：2010k
- 原文格式：O
- 会议级别：全国
摘要
为研究厦门滨海复杂地层环境下,深基坑在施工中的稳定性及对周边环境的扰动规律,本文以厦门地铁2号线海沧大道站基坑为背景,通过现场实测的研究方法,从地下连续墙水平位移、地表沉降、地下水位交化和建筑物沉降等方面进行研究,得出如下结论:①地下连续墙水平位移最大值为24.5mm,约为基坑深度H的0.35%,略小于上海及其他软土地区基坑的水平位移控制值;②地表沉降槽呈现"√"状分布,最大值出现在距基坑边0.5倍基坑深度位置附近,影响范围约为1.76倍基坑深度范围,监测区域地表沉降最大值为22.4mm;③滨海地区基坑施工过程中地下水位表现为上下波动的变化,是重点监测项目之一,总体呈现上升的趋势,累积变化量未超报警值;④墙体水平位移、地表沉降等现场监测数据均较小,未达报警值,可以看出针对工程风险点所采取的针对性控制措施取得了较好的效果;⑤文章研究成果,对厦门滨海复杂地层环境下类似深基坑工程施工具有参考价值和指导意义。
To study the environment of the coastal complex formation,deformation law of the long and deep foundation pit due to excavation disturbances,taking the foundation pit of the Haicang Road station of Xiamen Metro Line 2 as the background,through on-site measurement,this article conducted the research from three aspects:horizontal displacement of the underground continuous wall,surface subsidence and groundwater level changes,and concluded that:Ⅰ.the maximum horizontal displacement of the underground continuous wall is 24.5mm,about 0.35%of the depth of foundation pit(H),slightly lesser than the other soft soil area;Ⅱ.surface subsidence trough shows " √ " shape distribution,the maximum appears at a distances of 0.5 times of the foundation pit depth(H) from the pit side,the range of influence is about 1.76 times of the depth of foundation pit,the maximum surface subsidence of monitoring sections is 22.4mm;Ⅲ.during the construction of excavation,the groundwater level of coastal areas shows fluctuations as a change in performance,showing a rising trend in whole,the maximum cumulative variation is about 0.72cm;Ⅳ.the data of the field monitoring are small,not to reach the alarm value,it can be seen that the targeted control measures taken by the engineering risk points have achieved good results;Ⅴ.for the long and deep foundation pit under the environment of coastal complex formation,the research results have reference value and guiding significance.
To study the environment of the coastal complex formation,deformation law of the long and deep foundation pit due to excavation disturbances,taking the foundation pit of the Haicang Road station of Xiamen Metro Line 2 as the background,through on-site measurement,this article conducted the research from three aspects:horizontal displacement of the underground continuous wall,surface subsidence and groundwater level changes,and concluded that:Ⅰ.the maximum horizontal displacement of the underground continuous wall is 24.5mm,about 0.35%of the depth of foundation pit(H),slightly lesser than the other soft soil area;Ⅱ.surface subsidence trough shows " √ " shape distribution,the maximum appears at a distances of 0.5 times of the foundation pit depth(H) from the pit side,the range of influence is about 1.76 times of the depth of foundation pit,the maximum surface subsidence of monitoring sections is 22.4mm;Ⅲ.during the construction of excavation,the groundwater level of coastal areas shows fluctuations as a change in performance,showing a rising trend in whole,the maximum cumulative variation is about 0.72cm;Ⅳ.the data of the field monitoring are small,not to reach the alarm value,it can be seen that the targeted control measures taken by the engineering risk points have achieved good results;Ⅴ.for the long and deep foundation pit under the environment of coastal complex formation,the research results have reference value and guiding significance.
引文
[1]刘建航,侯学渊.基坑工程手册[M].北京:中国建筑出版社,2009.
[2]Peck,R.B.(1969)."Deep excavation and tunneling in soft ground.State-oftheart-report."Proc.,7th Int.Conf.of Soil Mechanics and Foundation Engineering,International Society of Soil Mechanics and Geotechnical Engineering(ISSMGE),Mexico City,225-281.
[3]Clough,R.W.,and O'Rourke,T.D.1990.Construction induced movements of in-situ walls.In Proceedings,Design and Performance of Earth Retaining Structures,ASCE Special Conference,Ithaca,N.Y.pp.439-470.
[4]Hsieh,P.G.,and Ou,C.Y.1998.Shape of ground surface settlement profiles caused by excavation.Canadian Geotechnical Journal,35(6):1004-1017.
[5]Hashash,Y.M.A.,Osouli,A.,and Marulanda,C.(2008)."Central artery/tunnel project excavation induced ground deformations."J.Geotech.Geoenviron.Eng.,134(9),1399-1406.
[6]刘国彬,刘登攀,刘丽雯,等.基坑坑底施工阶段围护墙变形监测分析[J].岩石力学与工程学报,2007,S2:4386-4394.(Liu Guobin,Liu Dengpan,Liu Liwen,et al.Monitoring and analysis of lateral deformation of retaining wall during bottom excavation in deep pit[J].Chinese Journal of Rock Mechanics and Engineering,2007,S2:4386-4394.(in Chinese))
[7]刘燕,刘国彬,孙晓玲,等.考虑时空效应的软土地区深基坑变形分析[J].岩土工程学报,2006,S1:1433-1436.(Liu Guobin,Sun Xiaoling,Liu Yan,et al.Analysis of deformation laws by using the rule of time-space effect in soft soil excavation[J].Chinese Journal of Geotechnical Engineering,2006,S1:1433-1436.(in Chinese))
[8]廖少明,魏仕锋,谭勇,等.苏州地区大尺度深基坑变形性状实测分析[J].岩土工程学报,2015(3):458-469.(Liao Shaoming,Wei Shifeng,Tan Yong,et al.Suzhou area large scale deep foundation pit deformation experimental analysis of the character of geotechnical engineering[J].Chinese Journal of Geotechnical Engineering,2015(3):458-469.(in Chinese))
[9]朱炎兵,周小华,魏仕锋,等.临近既有地铁车站的基坑变形性状研究[J].岩土力学,2013,10:2997-3002.(Zhu Yanbing,Zhou Xiaohua,Wei Shifeng,et al.Investigation on deformation behaviors of foundation pit adjacent to existing metro stations[J].Rock and Soil Mechanics,2013,10:2997-3002.(in Chinese))
[10]王建华,徐中华,陈锦剑,等.上海软土地区深基坑连续墙的变形特性浅析[J].地下空间与工程学报,2005,04:485-489.(Wang Jianhua,Xu Zhonghua,Chen Jinjian,et al.Deformation Properties of Diaphragm Wall Due to Deep Excavation in Shanghai Soft Soil[J].Chinese Journal of Underground Space and Engineering,2005,04:485-489.(in Chinese))
[11]徐营营,徐中华,王建华,等.采用逆作法的超大型深基坑三维有限元分析[J].地下空间与工程学报,2005,05:789-792.(Xu Yingying,Xu Zhonghua,Wang Jianhua,et al.Three Dimensional FEM Analysis of a Specially Big&Deep Excavation Using Top-down Method[J].Chinese Journal of Underground Space and Engineering,2005,05:789-792.(in Chinese))
[12]徐中华,王建华,王卫东.主体地下结构与支护结构相结合的复杂深基坑分析[J].岩土工程学报,2006,S1:1355-1359.(Wang Jianhua,Xu Zhonghua,Wang Weidong.Analysis of a complicated deep excavations supported by substructures[J].Chinese Journal of Geotechnical Engineering,2006,S1:1355-1359.(in Chinese))
[13]李卫明,汪伟民,雷明锋,等.长大深基坑围护桩施工力学特性分析[J].公路工程,2009,3:97-101.(Li Weiming,Wang Weimin,Lei Mingfeng,et al.Analysis on the Construction Mechanics Characteristics of Large-long-deep Foundation Pit Retaining Pile[J].Highway Engineering,2009,3:97-101.(in Chinese))
[14]雷明锋,彭立敏,施成华,等.长大深基坑施工空间效应研究[J].岩土力学.2010,31(5):1579-1584,1596.(Lei Mingfeng,Peng Limin,Shi Chenghua,et al.Research on construction spatial effects in large-long-deep foundation pit[J].Rock and Soil Mechanics,2010,31(5):1579-1584,1596.(in Chinese))
[2]Peck,R.B.(1969)."Deep excavation and tunneling in soft ground.State-oftheart-report."Proc.,7th Int.Conf.of Soil Mechanics and Foundation Engineering,International Society of Soil Mechanics and Geotechnical Engineering(ISSMGE),Mexico City,225-281.
[3]Clough,R.W.,and O'Rourke,T.D.1990.Construction induced movements of in-situ walls.In Proceedings,Design and Performance of Earth Retaining Structures,ASCE Special Conference,Ithaca,N.Y.pp.439-470.
[4]Hsieh,P.G.,and Ou,C.Y.1998.Shape of ground surface settlement profiles caused by excavation.Canadian Geotechnical Journal,35(6):1004-1017.
[5]Hashash,Y.M.A.,Osouli,A.,and Marulanda,C.(2008)."Central artery/tunnel project excavation induced ground deformations."J.Geotech.Geoenviron.Eng.,134(9),1399-1406.
[6]刘国彬,刘登攀,刘丽雯,等.基坑坑底施工阶段围护墙变形监测分析[J].岩石力学与工程学报,2007,S2:4386-4394.(Liu Guobin,Liu Dengpan,Liu Liwen,et al.Monitoring and analysis of lateral deformation of retaining wall during bottom excavation in deep pit[J].Chinese Journal of Rock Mechanics and Engineering,2007,S2:4386-4394.(in Chinese))
[7]刘燕,刘国彬,孙晓玲,等.考虑时空效应的软土地区深基坑变形分析[J].岩土工程学报,2006,S1:1433-1436.(Liu Guobin,Sun Xiaoling,Liu Yan,et al.Analysis of deformation laws by using the rule of time-space effect in soft soil excavation[J].Chinese Journal of Geotechnical Engineering,2006,S1:1433-1436.(in Chinese))
[8]廖少明,魏仕锋,谭勇,等.苏州地区大尺度深基坑变形性状实测分析[J].岩土工程学报,2015(3):458-469.(Liao Shaoming,Wei Shifeng,Tan Yong,et al.Suzhou area large scale deep foundation pit deformation experimental analysis of the character of geotechnical engineering[J].Chinese Journal of Geotechnical Engineering,2015(3):458-469.(in Chinese))
[9]朱炎兵,周小华,魏仕锋,等.临近既有地铁车站的基坑变形性状研究[J].岩土力学,2013,10:2997-3002.(Zhu Yanbing,Zhou Xiaohua,Wei Shifeng,et al.Investigation on deformation behaviors of foundation pit adjacent to existing metro stations[J].Rock and Soil Mechanics,2013,10:2997-3002.(in Chinese))
[10]王建华,徐中华,陈锦剑,等.上海软土地区深基坑连续墙的变形特性浅析[J].地下空间与工程学报,2005,04:485-489.(Wang Jianhua,Xu Zhonghua,Chen Jinjian,et al.Deformation Properties of Diaphragm Wall Due to Deep Excavation in Shanghai Soft Soil[J].Chinese Journal of Underground Space and Engineering,2005,04:485-489.(in Chinese))
[11]徐营营,徐中华,王建华,等.采用逆作法的超大型深基坑三维有限元分析[J].地下空间与工程学报,2005,05:789-792.(Xu Yingying,Xu Zhonghua,Wang Jianhua,et al.Three Dimensional FEM Analysis of a Specially Big&Deep Excavation Using Top-down Method[J].Chinese Journal of Underground Space and Engineering,2005,05:789-792.(in Chinese))
[12]徐中华,王建华,王卫东.主体地下结构与支护结构相结合的复杂深基坑分析[J].岩土工程学报,2006,S1:1355-1359.(Wang Jianhua,Xu Zhonghua,Wang Weidong.Analysis of a complicated deep excavations supported by substructures[J].Chinese Journal of Geotechnical Engineering,2006,S1:1355-1359.(in Chinese))
[13]李卫明,汪伟民,雷明锋,等.长大深基坑围护桩施工力学特性分析[J].公路工程,2009,3:97-101.(Li Weiming,Wang Weimin,Lei Mingfeng,et al.Analysis on the Construction Mechanics Characteristics of Large-long-deep Foundation Pit Retaining Pile[J].Highway Engineering,2009,3:97-101.(in Chinese))
[14]雷明锋,彭立敏,施成华,等.长大深基坑施工空间效应研究[J].岩土力学.2010,31(5):1579-1584,1596.(Lei Mingfeng,Peng Limin,Shi Chenghua,et al.Research on construction spatial effects in large-long-deep foundation pit[J].Rock and Soil Mechanics,2010,31(5):1579-1584,1596.(in Chinese))