基于临界稳定的某石灰岩质基坑软弱结构面参数反分析
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- 英文论文题名：The Analysis of Structural Plane About the Limestone Foundation Pit Based On the Critical Stability
- 论文作者：宋享桦 ; 刘俊岩 ; 刘燕
- 英文论文作者：Song Xianghua ; Liu Junyan ; Liu Yan ; School of Civil Engineering and Architecture of University of Jinan ; Urban underground engineering support and risk control in Shandong province engineering research center
- 年：2016
- 作者机构：济南大学土木建筑学院;山东省城市地下工程支护与风险监控工程研究中心;
- 论文关键词：岩石基坑 ; 结构面 ; 基坑开挖 ; 黏聚力强度参数 ; 倾角参数 ; 数值模拟
- 英文论文关键词：rock foundation pit ; structural plane ; excavation of foundation pit ; the strength parameters ; the angle parameters ; numerical simulation
- 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：TU45;TU753
- 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：13
- 文件大小：1637k
- 原文格式：O
- 会议级别：全国
摘要
本文以济南某石灰岩基坑为背景,采用三维快速拉格朗日方法(FLAC3D)建立岩质基坑与结构面相关联的三维动态计算模型,基于岩体结构面破坏的Mohr-Coulomb准则和稳定性准则,通过定值判据,反分析结构面强度及产状的参数。以结构面倾角、黏聚力强度作为随机变量,在探究基坑开挖过程中x-z斜截面上应力场变化的基础上,分析了结构面黏聚力强度、倾角与结构面裸露高度的对应关系,得出了在基坑处于临界稳定状态下,当结构面的倾角一定时,裸露高度不断增加,则结构面的临界黏聚力强度不断增大;当保持结构面的黏聚力一定时,裸露高度不断增加,则结构面的临界倾角不断减小。这为基坑工程的支护设计、施工提供判据借鉴,对类似工程具有一定的指导意义。
The article was based on a real limestone foundation pit in Jinan city,fast Lagrangian Analysis of Continua in 3 Dimensions(FLAC3D) was employed to investigate the deformation characteristics of a structural plane and rock foundation pit.Based on the Mohr-Coulomb strength criterion of joint in rock mass and reliability theory,analyzing the the intensity of structural plane and the parameters of the occurrence through a certain fixed value criterion inversely.The structural plane inclination as well as the cohesion are taken as random variables,based on the process of exploring excavation x-z stress field change on the inclined section.Analyzing some influences caused by these random variables with the structural plane heights.The results:Based on the stability of foundation pit in critical condition,keeping the angle of structural plane unchanged,when the bare height increasing,the structural plane compressive force intensity presents the increasing trend as well,in a linear style.Keeping the structural plane compressive force unchanged,when the bare height increasing,the angle of structural plane presents the decreasing trend as well,in a linear style.The regularity of the angle of structural plane with the structural plane heights is discussed.Maybe it has a certain guiding significance for the design and construction of similar projects.
The article was based on a real limestone foundation pit in Jinan city,fast Lagrangian Analysis of Continua in 3 Dimensions(FLAC3D) was employed to investigate the deformation characteristics of a structural plane and rock foundation pit.Based on the Mohr-Coulomb strength criterion of joint in rock mass and reliability theory,analyzing the the intensity of structural plane and the parameters of the occurrence through a certain fixed value criterion inversely.The structural plane inclination as well as the cohesion are taken as random variables,based on the process of exploring excavation x-z stress field change on the inclined section.Analyzing some influences caused by these random variables with the structural plane heights.The results:Based on the stability of foundation pit in critical condition,keeping the angle of structural plane unchanged,when the bare height increasing,the structural plane compressive force intensity presents the increasing trend as well,in a linear style.Keeping the structural plane compressive force unchanged,when the bare height increasing,the angle of structural plane presents the decreasing trend as well,in a linear style.The regularity of the angle of structural plane with the structural plane heights is discussed.Maybe it has a certain guiding significance for the design and construction of similar projects.
引文
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[4]曾纪全,杨宗才.岩体抗剪强度参数的结构面倾角效应[J].岩石力学与工程学报,2004(20):3418-3425.(Zeng Jiquan,Yang Zongcai,Dip Effect of Structural Plane on Shearing Strength Parameters of Rock Mass[J].Chinese Journal of Rock Mechanics and Engineering,2004(20):3418-3425.(in Chinese))
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[7]卢敦华,曲艳伟,何忠明,彭文祥,周莲君.结构面强度参数对层状边坡稳定性影响的三维分析[J].中南大学学报(自然科学版),2011(01):147-151.(Lu Dunhua,Qu Yanwei,He Zhongming,Peng Wenxiang,Zhou Lianjun,Three dimensional analysis for effect of structural plane strength parameters on stratified slope stability,Journal of Central South University(Science and Technology),2011(01):147-157.(in Chinese))
[8]王智德,夏元友,夏国邦,李敬东,陈东.顺层岩质边坡结构面抗剪强度特性试验研究[J].岩土力学,2015,S2:193-200.(Wang Zhide,Xia Yuanyou,Xia Guobang,Li Jingdong,Chen Dong,An experimental study of shear strength characteristics of structural plane of bedding rock slope[J].Rock and Soil Mechanics,2015,S2:193-200.(in Chinese))
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[2]刘涛,刘红军.青岛岩石地区基坑工程设计与施工探讨[J].岩土工程学报,2010,S1:499-503.(Liu tao,Liu hong jun.Design and construction of foundation pits in rock area in Qingdao[J].Chinese Journal of Geotechnical Engineering,2010,S1:499-503.(in Chinese))
[3]罗强,李鹏,钟祖良,刘新荣,傅晏.重庆基坑工程中的砂岩边坡稳定性问题研究[J].地下空间与工程学报,2009(02):307-311.(Luo Qiang,Li Peng,Zhong Zuliang,Liu Xinrong,Fu Yan,Research on Sandstone Slope Stability of Foundation Ditch in Chongqing Area[J].Chinese Journal of Underground Space and Engineering,2009(02):307-311.(in Chinese))
[4]曾纪全,杨宗才.岩体抗剪强度参数的结构面倾角效应[J].岩石力学与工程学报,2004(20):3418-3425.(Zeng Jiquan,Yang Zongcai,Dip Effect of Structural Plane on Shearing Strength Parameters of Rock Mass[J].Chinese Journal of Rock Mechanics and Engineering,2004(20):3418-3425.(in Chinese))
[5]唐良琴.软弱夹层粒度成分与强度参数的关系研究[J].重庆交通学院学报,2005(02):94-97+114.(Tang Liangqin.The relational study between the granulometric composition and strength parameter of the weak intercalated layers[J].Journal of Chongqing University,2005(02):94-97+114.(in Chinese))
[6]刘东升,张浪,宋强辉,杨凯.岩体结构面强度的可靠度分析[J].岩土力学,2009(02):328-332.(Liu Dongsheng,Zhang Lang,Song Qianghui,Yang Kai,Reliability analysis of strength for joint in rock mass[J],Rock and Soil Mechanics[J],Rock and Soil Mechanics,2009(02):328-332.(in Chinese))
[7]卢敦华,曲艳伟,何忠明,彭文祥,周莲君.结构面强度参数对层状边坡稳定性影响的三维分析[J].中南大学学报(自然科学版),2011(01):147-151.(Lu Dunhua,Qu Yanwei,He Zhongming,Peng Wenxiang,Zhou Lianjun,Three dimensional analysis for effect of structural plane strength parameters on stratified slope stability,Journal of Central South University(Science and Technology),2011(01):147-157.(in Chinese))
[8]王智德,夏元友,夏国邦,李敬东,陈东.顺层岩质边坡结构面抗剪强度特性试验研究[J].岩土力学,2015,S2:193-200.(Wang Zhide,Xia Yuanyou,Xia Guobang,Li Jingdong,Chen Dong,An experimental study of shear strength characteristics of structural plane of bedding rock slope[J].Rock and Soil Mechanics,2015,S2:193-200.(in Chinese))
[9]郑颖人,沈珠江,龚晓南.岩土塑性力学原理[M].北京:中国建筑工业出版社,2002:65-66.(Zheng Yingren,Shen Zhujiang,Gong Xiaonan,2002:65-66.(in Chinese))
[10]中华人民共和国住房和城乡建设部.《建筑边坡工程技术规范》GB 50330-2013.[M].北京:中国建筑工业出版社.