松散体边坡开挖及支护前后的稳定性分析
|
摘要
松散体边坡常位于高烈度地震峡谷区公路两侧,具有结构复杂、影响因素多等特点,易对山区公路的选线设计和运营造成较大的威胁,因此,采用合理的方法研究松散体边坡的稳定性具有非常重要的实用意义。结合实际工程案例,基于强度折减法,建立松散体边坡有限元模型,对其进行不同阶段开挖和有无支护的稳定性分析,结果表明:松散体边坡的稳定性与开挖高度、开挖量有关,并且预应力锚杆加固可以明显加强其整体性,提高稳定性。
Loose deposit slope is usually located to the side of highway in the high-intensity seismic valley region,which has the characteristics of complicated structure and various kinds of influencing factors,and it will cause a great threat to the design and operation of highway probably.Therefore,it is greatly important to research the stability of loose deposit slope through reasonable methods.Combined with the case of practical projects and based on strength reduction method,a finite-element model of loose deposit slope is built to analyze the stability in the different stages of excavation and support.The results shows that the stability of loose deposit slope is related to the excavation height and excavated volume.What's more,the support with prestressed bolts can significantly enhance its integrity and improve the stability.
Loose deposit slope is usually located to the side of highway in the high-intensity seismic valley region,which has the characteristics of complicated structure and various kinds of influencing factors,and it will cause a great threat to the design and operation of highway probably.Therefore,it is greatly important to research the stability of loose deposit slope through reasonable methods.Combined with the case of practical projects and based on strength reduction method,a finite-element model of loose deposit slope is built to analyze the stability in the different stages of excavation and support.The results shows that the stability of loose deposit slope is related to the excavation height and excavated volume.What's more,the support with prestressed bolts can significantly enhance its integrity and improve the stability.
引文
[1] Wu Jianhong,Lin Jeenshang,Chen Chaoshi.Dynamic discrete analysis of an earthquake-included large-scale landslide[J].International Journal of Rock Mechanics & Mining Sciences,2009,46(2):397-407.
[2] 吉随旺,唐永建,胡德贵,等.四川省汶川地震灾区干线公路典型震害特征分析[J].岩石力学与工程学报,2009,28(6):1250-1260. Ji Suiwang,Tang Yongjian,Hu Degui,et al.Analysis oftypical seismic damages of highways in Wenchuan earthquake-induced hazard areas in Sichuan province[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(6):1250-1260.(in Chinese)
[3] 李红旭,盛谦,张勇慧.山区公路边坡地质灾害数据库及统计分析[J].防震减灾工程学报,2011,31(6):675-681. Li Hongxu,Sheng Qian,Zhang Yonghui.Database system and statistical analysis for slopes along mountainous highway[J].Journal of Disaster Prevention and Mitigation Engineering,2011,31(6):675-681.(in Chinese)
[4] 陈国庆,黄润秋,石豫川,等.基于动态和整体强度折减法的边坡稳定性分析[J].岩石力学与工程学报,2014,33(2):243-256. Chen Guoqing,Huang Runqiu,Shi Yuchuan,et al.Stability analysis of slope based on dynamic and whole strength reduction methods[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(2):243-256.(in Chinese)
[5] 范强,李镜培,李林.临近斜坡静压沉桩过程中边坡动态稳定性研究[J].结构工程师,2017,33(1):176-183. Fan Qiang,Li Jingpei,Li Lin.Study of the slope stability varying during static pressure piledriving nearby[J].Structural Engineers,2017,33(1):176-183.(in Chinese)
[6] Medley E,Rehermann S.Characterization of bimrocks (rock/soil mixtures) with application to slope stability problems[C].Proceedings:Eurock 2004&53rdGeomechanics Colloquium Salznurg,Austria,2004.
[7] 董志高,吴继敏,王文远.地震作用崩塌堆积体边坡稳定性分析[J].水利水电科技进展,2006,26(5):37-40. Dong Zhigao,Wu Jimin,Wang Wenyuan,et al.Stability analysis of avalanche deposit slopes underearthquake action[J].Advances in Science and Technology of Water Resources,2006,26(5):37-40.(in Chinese)
[8] 张士伦,张孟喜,吉随旺,等.基于模糊分析的松散体边坡稳定性评价[J].上海交通大学学报,2015,49(7):1035-1039. Zhang Shilun,Zhang Mengxi,Ji Suiwang,et al.Loose media slope stability evaluation based on fuzzy analysis[J].Journal of Shanghai Jiaotong University,2015,49(7):1035-1039.(in Chinese)
[9] Cui P,Guo C X,Zhou J W,et al.The mechanisms behind shallow failures in slopes comprised of landslide deposits[J].Engineering Geology,2014,180(S1):34-44.
[10] 裴利剑,屈本宁,钱闪光.有限元强度折减法边坡失稳判据的统一性[J].岩土力学,2010,31(10):3337-3341. Pei Lijian,Qu Benning,Qian Shanguang.Uniformity of slope instability criteria of strength reduction with FEM[J].Rock and Soil Mechanics,2010,31(10):3337-3341.(in Chinese)
[11] Duncan J M.State of the art:limit equilibrium and finite-element analysis of slopes[J].Journal of Geotechnical Engineering,1997,122(7):577-596.
[12] 周元辅,邓建辉,崔玉龙,等.基于强度折减法的三维边坡失稳判据[J].岩土力学,2014,(5):1430-1437. Zhou Yuanfu,Deng Jianhui,Cui Yulong,et al.Instability criterion of three-dimensional slope based on strength reduction method[J].Journal of Geotechnical Engineering,2014,(5):1430-1437.(in Chinese)
[13] 栾茂田,武亚军,年廷凯.强度折减有限元法中边坡失稳的塑性区判据及其应用[J].防灾减灾工程学报,2003,23(3):1-8. Luan Maotian,Wu Yajun,Nian Tingkai.An alternative criterion for evaluation sloe stability based on development pf plastic zone by shear strength reduction FEM[J].Journal of Disaster Prevention and Mitigation Engineering,2003,23(3):1-8.(in Chinese)
[14] 陈力华,靳晓光.有限元强度折减法中边坡三种失效判据的适用性研究[J].土木工程学报,2012,45(9):136-146. Chen Lihua,Jin Xiaoguang.Study on the applicability of three criteria for slope instability using finite element strength reduction method[J].China Civil Engineering Journal,2012,45(9):136-146.(in Chinese)
[15] Griffiths D V,Lane P A.Slope stability analysis by finite element[J].Geotechnique,1999,49(3):387-403.
[16] 韩爱民,李建国,肖军华,等.预应力锚杆框架梁的支护力学行为研究[J].岩土力学,2010,31(9):2894-2900. Han Aimin,Li Jianguo,Xiao Junhua,et al.Mechanical behaviors of frame beam supporting structure with prestressed anchors[J].Rock and Soil Mechanics,2010,31(9):2894-2900.(in Chinese)
[17] 黄波,李佳.基于FLAC3D锚杆加固边坡机理的研究[J].结构工程师,2016,32(6):140-147. Huang Bo,Li Jia.Research on the mechanism of strengthening slope by anchors using FLAC3D[J].Structural Engineers,2016,32(6):140-147.(in Chinese)
[18] 项彦勇,冯山群.地层自重应力场中桩基荷载对隧道开挖塑性区影响的一种理论预测方法[J].土木工程学报,2012,(12):162-169. Xiang Yanyong,Feng Shanqun.A theoretical approach for predicting the influence of pile foundation load on the potential plastic zone induced by tunnel excavation in gravitational field[J].China Civil Engineering Journal,2012,(12):162-169.(in Chinese)
[2] 吉随旺,唐永建,胡德贵,等.四川省汶川地震灾区干线公路典型震害特征分析[J].岩石力学与工程学报,2009,28(6):1250-1260. Ji Suiwang,Tang Yongjian,Hu Degui,et al.Analysis oftypical seismic damages of highways in Wenchuan earthquake-induced hazard areas in Sichuan province[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(6):1250-1260.(in Chinese)
[3] 李红旭,盛谦,张勇慧.山区公路边坡地质灾害数据库及统计分析[J].防震减灾工程学报,2011,31(6):675-681. Li Hongxu,Sheng Qian,Zhang Yonghui.Database system and statistical analysis for slopes along mountainous highway[J].Journal of Disaster Prevention and Mitigation Engineering,2011,31(6):675-681.(in Chinese)
[4] 陈国庆,黄润秋,石豫川,等.基于动态和整体强度折减法的边坡稳定性分析[J].岩石力学与工程学报,2014,33(2):243-256. Chen Guoqing,Huang Runqiu,Shi Yuchuan,et al.Stability analysis of slope based on dynamic and whole strength reduction methods[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(2):243-256.(in Chinese)
[5] 范强,李镜培,李林.临近斜坡静压沉桩过程中边坡动态稳定性研究[J].结构工程师,2017,33(1):176-183. Fan Qiang,Li Jingpei,Li Lin.Study of the slope stability varying during static pressure piledriving nearby[J].Structural Engineers,2017,33(1):176-183.(in Chinese)
[6] Medley E,Rehermann S.Characterization of bimrocks (rock/soil mixtures) with application to slope stability problems[C].Proceedings:Eurock 2004&53rdGeomechanics Colloquium Salznurg,Austria,2004.
[7] 董志高,吴继敏,王文远.地震作用崩塌堆积体边坡稳定性分析[J].水利水电科技进展,2006,26(5):37-40. Dong Zhigao,Wu Jimin,Wang Wenyuan,et al.Stability analysis of avalanche deposit slopes underearthquake action[J].Advances in Science and Technology of Water Resources,2006,26(5):37-40.(in Chinese)
[8] 张士伦,张孟喜,吉随旺,等.基于模糊分析的松散体边坡稳定性评价[J].上海交通大学学报,2015,49(7):1035-1039. Zhang Shilun,Zhang Mengxi,Ji Suiwang,et al.Loose media slope stability evaluation based on fuzzy analysis[J].Journal of Shanghai Jiaotong University,2015,49(7):1035-1039.(in Chinese)
[9] Cui P,Guo C X,Zhou J W,et al.The mechanisms behind shallow failures in slopes comprised of landslide deposits[J].Engineering Geology,2014,180(S1):34-44.
[10] 裴利剑,屈本宁,钱闪光.有限元强度折减法边坡失稳判据的统一性[J].岩土力学,2010,31(10):3337-3341. Pei Lijian,Qu Benning,Qian Shanguang.Uniformity of slope instability criteria of strength reduction with FEM[J].Rock and Soil Mechanics,2010,31(10):3337-3341.(in Chinese)
[11] Duncan J M.State of the art:limit equilibrium and finite-element analysis of slopes[J].Journal of Geotechnical Engineering,1997,122(7):577-596.
[12] 周元辅,邓建辉,崔玉龙,等.基于强度折减法的三维边坡失稳判据[J].岩土力学,2014,(5):1430-1437. Zhou Yuanfu,Deng Jianhui,Cui Yulong,et al.Instability criterion of three-dimensional slope based on strength reduction method[J].Journal of Geotechnical Engineering,2014,(5):1430-1437.(in Chinese)
[13] 栾茂田,武亚军,年廷凯.强度折减有限元法中边坡失稳的塑性区判据及其应用[J].防灾减灾工程学报,2003,23(3):1-8. Luan Maotian,Wu Yajun,Nian Tingkai.An alternative criterion for evaluation sloe stability based on development pf plastic zone by shear strength reduction FEM[J].Journal of Disaster Prevention and Mitigation Engineering,2003,23(3):1-8.(in Chinese)
[14] 陈力华,靳晓光.有限元强度折减法中边坡三种失效判据的适用性研究[J].土木工程学报,2012,45(9):136-146. Chen Lihua,Jin Xiaoguang.Study on the applicability of three criteria for slope instability using finite element strength reduction method[J].China Civil Engineering Journal,2012,45(9):136-146.(in Chinese)
[15] Griffiths D V,Lane P A.Slope stability analysis by finite element[J].Geotechnique,1999,49(3):387-403.
[16] 韩爱民,李建国,肖军华,等.预应力锚杆框架梁的支护力学行为研究[J].岩土力学,2010,31(9):2894-2900. Han Aimin,Li Jianguo,Xiao Junhua,et al.Mechanical behaviors of frame beam supporting structure with prestressed anchors[J].Rock and Soil Mechanics,2010,31(9):2894-2900.(in Chinese)
[17] 黄波,李佳.基于FLAC3D锚杆加固边坡机理的研究[J].结构工程师,2016,32(6):140-147. Huang Bo,Li Jia.Research on the mechanism of strengthening slope by anchors using FLAC3D[J].Structural Engineers,2016,32(6):140-147.(in Chinese)
[18] 项彦勇,冯山群.地层自重应力场中桩基荷载对隧道开挖塑性区影响的一种理论预测方法[J].土木工程学报,2012,(12):162-169. Xiang Yanyong,Feng Shanqun.A theoretical approach for predicting the influence of pile foundation load on the potential plastic zone induced by tunnel excavation in gravitational field[J].China Civil Engineering Journal,2012,(12):162-169.(in Chinese)