南京燕子矶中学实验楼后滑坡稳定性分析及加固
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摘要
分析了南京市燕子矶中学实验楼后滑坡的影响因素,并使用瑞典条分法计算了滑坡体在自重和地震烈度7作用下的稳定性系数,计算结果表明:滑坡体在自重作用下处于基本稳定状态;滑坡体在地震烈度7作用下处于不稳定状态;在多种因素的影响下,滑坡体目前处于不稳定状态;滑动带为软可塑状粉质粘土层,最后通过经济评价,提出了采用削坡压脚联合挂网喷锚支护的治理方案。
The paper analyzes the influential factors for the landslide behind the lab building of Yanziji Middle School in Nanjing,adopts the Sweden Slice Method to calculate the stability coefficient of the landsliding body under the effect of the gravity and the seismic intensity 7,and proves by the calculating result that the landslide body can remain the stable state under its gravity,while it can be in the unstable state under the seismic intensity 7,and it keeps in the unstable state with the influence of many factors,so the sliding zones are mainly soft plastic powder clay layer.Finally,through the economic evaluation,points out the treatment scheme by combining the slope cutting with pressing stand and the shotcrete rockbolt mesh support.
The paper analyzes the influential factors for the landslide behind the lab building of Yanziji Middle School in Nanjing,adopts the Sweden Slice Method to calculate the stability coefficient of the landsliding body under the effect of the gravity and the seismic intensity 7,and proves by the calculating result that the landslide body can remain the stable state under its gravity,while it can be in the unstable state under the seismic intensity 7,and it keeps in the unstable state with the influence of many factors,so the sliding zones are mainly soft plastic powder clay layer.Finally,through the economic evaluation,points out the treatment scheme by combining the slope cutting with pressing stand and the shotcrete rockbolt mesh support.
引文
[1]GB50011-2001,建筑抗震设计规范[S].
[2]许建聪,尚岳全,陈侃福,等.顺层滑坡弹塑性接触有限元稳定性分析[J].岩石力学与工程学报,2005,24(13):2231-2236.
[3]连镇营,韩国城,孔宪京.强度折减有限元法开挖滑坡的稳定性[J].岩土工程学报,2001,23(4):407-411.
[4]徐青,陈士军,陈胜宏.滑坡稳定分析剩余推力法的改进研究[J].岩土力学,2005,26(3):465-470.
[5]陈祖煜.土质边坡稳定分析——原理.方法.程序[M].北京:中国水利水电出版社,2003.
[6]DZ/T0218-2006,滑坡防治工程勘查规范[S].
[7]江苏华东基础建设工程有限公司.南京市燕子矶中学实验楼及食堂后山体滑坡地质灾害勘查报告[R].2011.
[8]刘天韵,吕和林.滑坡土体抗剪强度指标反算研究[J].西部探矿工程,2004(3):185-186.
[9]赵翔,康景文,蒋进,等.滑坡勘察中滑带土强度指标确定方法的探讨[J].地质灾害与环境保护,2009(3):43-49.
[10]刘祖典,党发宁.强度指标对滑坡稳定性的影响[J].岩土工程技术,2002(3):140-143.
[11]姚海林,郑少河,陈守义.考虑裂隙及雨水渗入影响的膨胀土坡稳定性分析[J].岩土工程学报,2001,23(5):606-609.
[2]许建聪,尚岳全,陈侃福,等.顺层滑坡弹塑性接触有限元稳定性分析[J].岩石力学与工程学报,2005,24(13):2231-2236.
[3]连镇营,韩国城,孔宪京.强度折减有限元法开挖滑坡的稳定性[J].岩土工程学报,2001,23(4):407-411.
[4]徐青,陈士军,陈胜宏.滑坡稳定分析剩余推力法的改进研究[J].岩土力学,2005,26(3):465-470.
[5]陈祖煜.土质边坡稳定分析——原理.方法.程序[M].北京:中国水利水电出版社,2003.
[6]DZ/T0218-2006,滑坡防治工程勘查规范[S].
[7]江苏华东基础建设工程有限公司.南京市燕子矶中学实验楼及食堂后山体滑坡地质灾害勘查报告[R].2011.
[8]刘天韵,吕和林.滑坡土体抗剪强度指标反算研究[J].西部探矿工程,2004(3):185-186.
[9]赵翔,康景文,蒋进,等.滑坡勘察中滑带土强度指标确定方法的探讨[J].地质灾害与环境保护,2009(3):43-49.
[10]刘祖典,党发宁.强度指标对滑坡稳定性的影响[J].岩土工程技术,2002(3):140-143.
[11]姚海林,郑少河,陈守义.考虑裂隙及雨水渗入影响的膨胀土坡稳定性分析[J].岩土工程学报,2001,23(5):606-609.
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