工程荷载诱发填方边坡变形破坏机制试验研究
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摘要
填方路堤在堆填碾压夯实后自然状态下具有较好的稳定性,但在先期施工与后期公路运营期间,受工程荷载、动荷载等多因素作用将会出现大量变形破坏现象。针对这一问题,本文以某填方路堤边坡为例,运用室内物理模拟技术探讨研究工程荷载诱发填方边坡变形破坏机制。研究结果表明:填方体在上部不断施加堆载后,坡体内部应力条件改变,产生不均匀沉降现象。填方体边坡变形破坏主要受控于填方体在加载过程中坡顶堆载处拉应力的集中与坡体内剪应力的集中程度,潜在滑动面沿张拉裂缝延伸方向扩展,同时在堆载体下部逐步过渡为压剪塑形带,两者逐步贯通并向下部扩展延伸,最终产生边坡整体变形破坏。其变形演化机制为:堆载作用下坡体内部应力重分布→堆载区边缘张拉裂缝形成并扩展、堆载体下部产生压剪塑形带→张拉裂缝、压剪塑形带贯通形成滑动面→推力作用下整体滑动,此变形为典型的蠕滑-拉裂式滑坡。此研究可以为相似工程提供借鉴。
The fill embankment has good stability under natural conditions after compaction. However,during the early construction and later road operation,a large number of deformation and damage phenomena could occur due to multiple factors such as engineering load and dynamic load. Aiming at this problem,this paper takes a fill embankment slope as an example,and uses indoor physical simulation technology to study the deformation and failure mechanism of the slope induced by the engineering load. The results show that after the pile is continuously applied in the upper part,the internal stress conditions of the slope change,resulting in uneven settlement. Thedeformation and failure of the fill slope is mainly controlled by the concentration of the tensile stress at the top of the slope during the loading process and the concentration of the shear stress in the slope. The direction of the crack extends and gradually changes to the pressure in the lower part of the pile carrier. The shear-shaped belt is gradually penetrated and extended to the lower portion to cause overall deformation and destruction of the slope. The deformation mechanism has the following process: from internal stress redistribution to tension crack formation and expansion then to tensile cracks to form a sliding surface,finally overall sliding. The deformation is a typical creeppull cracked landslide. This study can provide reference for similar projects.
The fill embankment has good stability under natural conditions after compaction. However,during the early construction and later road operation,a large number of deformation and damage phenomena could occur due to multiple factors such as engineering load and dynamic load. Aiming at this problem,this paper takes a fill embankment slope as an example,and uses indoor physical simulation technology to study the deformation and failure mechanism of the slope induced by the engineering load. The results show that after the pile is continuously applied in the upper part,the internal stress conditions of the slope change,resulting in uneven settlement. Thedeformation and failure of the fill slope is mainly controlled by the concentration of the tensile stress at the top of the slope during the loading process and the concentration of the shear stress in the slope. The direction of the crack extends and gradually changes to the pressure in the lower part of the pile carrier. The shear-shaped belt is gradually penetrated and extended to the lower portion to cause overall deformation and destruction of the slope. The deformation mechanism has the following process: from internal stress redistribution to tension crack formation and expansion then to tensile cracks to form a sliding surface,finally overall sliding. The deformation is a typical creeppull cracked landslide. This study can provide reference for similar projects.
引文
Cao C W,Xu Q,Qi X,et al.2017.Research on the deformation and failure of microstructure during the physical simulation of loess landslides[J].Science Technology and Engineering,17(33):225-231.
Chen J F,Song E X,Xu M.2011.Application of strength reduction FEMto stability analysis of high fill slope in Kunming new airport[J].Rock and Soil Mechanics,32(S1):636-641.
Feng W K,Shi Y C,Chai H J,et al.2006.Study on deformation and failure of reclamation road-dike on sloping ground with physical simulation method[J].Chinese Journal of Rock Mechanics and Engineering,25(S1):2861-2867.
Gao S X,Ge H,Jiang B S,et al.2017.Study on the deformation law of the Anning high-fill slope in Yunnan refined oil pipeline[J].Journal of Engineering Geology,25(3):892-900.
Ge M M,Li N,Zhang W,et al.2017.Settlement behavior and inverse prediction of post-construction settlement of high filled loess embankment[J].Chinese Journal of Rock Mechanics and Engineering,36(3):745-753.
He H J,Lan J W,Chen Y M,et al.2015.Monitoring and analysis of slope slip process at a landfill in Northwest China[J].Chinese Journal of Geotechnical Engineering,37(9):1721-1726.
Huang R Q,Zhao J J,Ju N P,et al.2013.Analysis of an anti-dip landslide triggered by the 2008 Wenchuan earthquake in China[J].Natural Hazards,68(2):1021-1039.
Jiang L,Yu X,Liu L J,et al.2017.Reliability analysis on filled slope based on Monte Carlo simulation[J].Chinese Journal of Underground Space and Engineering,13(S2):693-697.
Li T B,Tiao X L,Han W X,et al.2013.Centrifugal model tests on sliding failure of a pile-stabilized high fill slope[J].Rock and Soil Mechanics,34(11):3061-3070.
Liu H X,Xu Q,Li Y R.2014.Effect of lithology and structure on seismic response of steep slope in a shaking table test[J].Journal of Mountain Science,11(2):371-383.
Liu M C,Huang X M,Tao X H.2005.Influence factors on postconstruction settlement of high backfills adjacent to abutment[J].Journal of Traffic and Transportation Engineering,5(3):36-40.
Mei Y,Hu C M,Wei Y F,et al.2015.A centrifugal test study of the deformation of high backfill foundation in deep ravine of Q2and Q3loess[J].Rock and Soil Mechanics,36(12):3473-3481.
Su Y H,Luo Z D,Li X.2012.Gray correlation analysis method for cutand-fill roadbed slope stability based on uniform experiment[J].Rock and Soil Mechanics,33(8):2259-2264.
Tian J X,Wei Y Q,Cai H,et al.2014.Study on the stability of high fill engineering under extreme rainfall conditions[J].Journal of Hydraulic Engineering,45(S2):175-179.
Xia H,Hu X L,Tang H M,et al.2017.Application of infrared thermal radiation imaging technology to landslide physical model test[J].Rock and Soil Mechanics,38(1):291-299.
Xie C Q,Pan K,Liao C G,et al.2017.Landslide mechanism and treatment measures for high fill slope at airport in southwestern China[J].Journal of Engineering Geology,25(4):1083-1093.
Yang X H,Zhu Y P,Zhou Y,et al.2016.Time-space monitoring and stability analysis of high fill slope slip process at a airport in mountain region[J].Chinese Journal of Rock Mechanics and Engineering,35(S2):3977-3990.
Yang X H,Zhu Y P,Guo N.2017.Strength and deformation characteristic of soil-rock mixture and settlement prediction in high filled projects[J].Chinese Journal of Rock Mechanics and Engineering,36(7):1780-1790.
Zhang S,Pei X J,Huang R Q,et al.2017.Loading deformation process and mechanical characteristics of high fill loess slope[J].Journal of Engineering Geology,25(3):657-670.
Zhang S,Pei X J,Huang R Q,et al.2017.Rainfall induced instability mechanism of high embankment retaining loess slope[J].Journal of Engineering Geology,25(4):1094-1104.
Zhao J J,Ma Y T,Lin B,et al.2016.Geomechanical mode of mining landslides with gently counter-inclined bedding-a case study of Madaling landslide in Guizhou Province[J].Chinese Journal of Rock Mechanics and Engineering,35(11):2217-2224.
Zhao J J,Yu J L,Xie M L,et al.2018.Physical model studies on fill embankment slope deformation mechanism under rainfall condition[J].Rock and Soil Mechanics,39(8):2933-2940.
曹从伍,许强,亓星,等.2017.黄土填方边坡物理模拟过程中微结构变形破坏特征[J].科学技术与工程,17(33):225-231.
陈金锋,宋二祥,徐明.2011.强度折减有限元法在昆明新机场高填方边坡稳定分析中的应用[J].岩土力学,32(S1):636-641.
冯文凯,石豫川,柴贺军,等.2006.斜坡填筑路堤变形破坏物理模拟研究[J].岩石力学与工程学报,25(S1):2861-2867.
高盛翔,葛华,蒋斌松,等.2017.云南成品油管道安宁高填方边坡变形规律研究[J].工程地质学报,25(3):892-900.
葛苗苗,李宁,张炜,等.2017.黄土高填方沉降规律分析及工后沉降反演预测[J].岩石力学与工程学报,36(3):745-753.
何海杰,兰吉武,陈云敏,等.2015.西北地区某填埋场堆体滑移过程监测与分析[J].岩土工程学报,37(9):1721-1726.
蒋辽,喻兴,刘林洁,等.2017.基于蒙特卡罗模拟的填方边坡可靠度分析[J].地下空间与工程学报,13(S2):693-697.
李天斌,田晓丽,韩文喜,等.2013.预加固高填方边坡滑动破坏的离心模型试验研究[J].岩土力学,34(11):3061-3070.
刘萌成,黄晓明,陶向华.2005.桥台后高填方路堤工后沉降影响因素分析[J].交通运输工程学报,5(3):36-40.
梅源,胡长明,魏弋峰,等.2015.Q2、Q3黄土深堑中高填方地基变形规律离心模型试验研究[J].岩土力学,36(12):3473-3481.
苏永华,罗正东,李翔.2012.基于均匀试验的半填半挖路基边坡稳定性灰色关联分析法[J].岩土力学,33(8):2259-2264.
谢春庆,潘凯,廖崇高,等.2017.西南某机场高填方边坡滑塌机制分析与处理措施研究[J].工程地质学报,25(4):1083-1093.
夏浩,胡新丽,唐辉明,等.2017.红外热像技术在滑坡物理模型试验中的应用[J].岩土力学,38(1):291-299.
田继雪,魏迎奇,蔡红,等.2014.极端降雨条件下高填方工程的稳定性研究[J].水利学报,45(S2):175-179.
杨校辉,朱彦鹏,周勇,等.2016.山区机场高填方边坡滑移过程时空监测与稳定性分析[J].岩石力学与工程学报,35(S2):3977-3990.
杨校辉,朱彦鹏,郭楠.2017.高填方土石混合料强度与变形特性及沉降预测研究[J].岩石力学与工程学报,36(7):1780-1790.
张硕,裴向军,黄润秋,等.2017a.黄土高填方坡体加载过程变形-力学响应特征研究[J].工程地质学报,25(3):657-670.
张硕,裴向军,黄润秋,等.2017b.降雨诱发黄土高填方支挡边坡失稳机理研究[J].工程地质学报,25(4):1094-1104.
赵建军,马运韬,蔺冰,等.2016.平缓反倾采动滑坡形成的地质力学模式研究---以贵州省马达岭滑坡为例[J].岩石力学与工程学报,35(11):2217-2224.
赵建军,余建乐,解明礼,等.2018.降雨诱发填方路堤边坡变形机制物理模拟研究[J].岩土力学,39(8):2933-2940.
Chen J F,Song E X,Xu M.2011.Application of strength reduction FEMto stability analysis of high fill slope in Kunming new airport[J].Rock and Soil Mechanics,32(S1):636-641.
Feng W K,Shi Y C,Chai H J,et al.2006.Study on deformation and failure of reclamation road-dike on sloping ground with physical simulation method[J].Chinese Journal of Rock Mechanics and Engineering,25(S1):2861-2867.
Gao S X,Ge H,Jiang B S,et al.2017.Study on the deformation law of the Anning high-fill slope in Yunnan refined oil pipeline[J].Journal of Engineering Geology,25(3):892-900.
Ge M M,Li N,Zhang W,et al.2017.Settlement behavior and inverse prediction of post-construction settlement of high filled loess embankment[J].Chinese Journal of Rock Mechanics and Engineering,36(3):745-753.
He H J,Lan J W,Chen Y M,et al.2015.Monitoring and analysis of slope slip process at a landfill in Northwest China[J].Chinese Journal of Geotechnical Engineering,37(9):1721-1726.
Huang R Q,Zhao J J,Ju N P,et al.2013.Analysis of an anti-dip landslide triggered by the 2008 Wenchuan earthquake in China[J].Natural Hazards,68(2):1021-1039.
Jiang L,Yu X,Liu L J,et al.2017.Reliability analysis on filled slope based on Monte Carlo simulation[J].Chinese Journal of Underground Space and Engineering,13(S2):693-697.
Li T B,Tiao X L,Han W X,et al.2013.Centrifugal model tests on sliding failure of a pile-stabilized high fill slope[J].Rock and Soil Mechanics,34(11):3061-3070.
Liu H X,Xu Q,Li Y R.2014.Effect of lithology and structure on seismic response of steep slope in a shaking table test[J].Journal of Mountain Science,11(2):371-383.
Liu M C,Huang X M,Tao X H.2005.Influence factors on postconstruction settlement of high backfills adjacent to abutment[J].Journal of Traffic and Transportation Engineering,5(3):36-40.
Mei Y,Hu C M,Wei Y F,et al.2015.A centrifugal test study of the deformation of high backfill foundation in deep ravine of Q2and Q3loess[J].Rock and Soil Mechanics,36(12):3473-3481.
Su Y H,Luo Z D,Li X.2012.Gray correlation analysis method for cutand-fill roadbed slope stability based on uniform experiment[J].Rock and Soil Mechanics,33(8):2259-2264.
Tian J X,Wei Y Q,Cai H,et al.2014.Study on the stability of high fill engineering under extreme rainfall conditions[J].Journal of Hydraulic Engineering,45(S2):175-179.
Xia H,Hu X L,Tang H M,et al.2017.Application of infrared thermal radiation imaging technology to landslide physical model test[J].Rock and Soil Mechanics,38(1):291-299.
Xie C Q,Pan K,Liao C G,et al.2017.Landslide mechanism and treatment measures for high fill slope at airport in southwestern China[J].Journal of Engineering Geology,25(4):1083-1093.
Yang X H,Zhu Y P,Zhou Y,et al.2016.Time-space monitoring and stability analysis of high fill slope slip process at a airport in mountain region[J].Chinese Journal of Rock Mechanics and Engineering,35(S2):3977-3990.
Yang X H,Zhu Y P,Guo N.2017.Strength and deformation characteristic of soil-rock mixture and settlement prediction in high filled projects[J].Chinese Journal of Rock Mechanics and Engineering,36(7):1780-1790.
Zhang S,Pei X J,Huang R Q,et al.2017.Loading deformation process and mechanical characteristics of high fill loess slope[J].Journal of Engineering Geology,25(3):657-670.
Zhang S,Pei X J,Huang R Q,et al.2017.Rainfall induced instability mechanism of high embankment retaining loess slope[J].Journal of Engineering Geology,25(4):1094-1104.
Zhao J J,Ma Y T,Lin B,et al.2016.Geomechanical mode of mining landslides with gently counter-inclined bedding-a case study of Madaling landslide in Guizhou Province[J].Chinese Journal of Rock Mechanics and Engineering,35(11):2217-2224.
Zhao J J,Yu J L,Xie M L,et al.2018.Physical model studies on fill embankment slope deformation mechanism under rainfall condition[J].Rock and Soil Mechanics,39(8):2933-2940.
曹从伍,许强,亓星,等.2017.黄土填方边坡物理模拟过程中微结构变形破坏特征[J].科学技术与工程,17(33):225-231.
陈金锋,宋二祥,徐明.2011.强度折减有限元法在昆明新机场高填方边坡稳定分析中的应用[J].岩土力学,32(S1):636-641.
冯文凯,石豫川,柴贺军,等.2006.斜坡填筑路堤变形破坏物理模拟研究[J].岩石力学与工程学报,25(S1):2861-2867.
高盛翔,葛华,蒋斌松,等.2017.云南成品油管道安宁高填方边坡变形规律研究[J].工程地质学报,25(3):892-900.
葛苗苗,李宁,张炜,等.2017.黄土高填方沉降规律分析及工后沉降反演预测[J].岩石力学与工程学报,36(3):745-753.
何海杰,兰吉武,陈云敏,等.2015.西北地区某填埋场堆体滑移过程监测与分析[J].岩土工程学报,37(9):1721-1726.
蒋辽,喻兴,刘林洁,等.2017.基于蒙特卡罗模拟的填方边坡可靠度分析[J].地下空间与工程学报,13(S2):693-697.
李天斌,田晓丽,韩文喜,等.2013.预加固高填方边坡滑动破坏的离心模型试验研究[J].岩土力学,34(11):3061-3070.
刘萌成,黄晓明,陶向华.2005.桥台后高填方路堤工后沉降影响因素分析[J].交通运输工程学报,5(3):36-40.
梅源,胡长明,魏弋峰,等.2015.Q2、Q3黄土深堑中高填方地基变形规律离心模型试验研究[J].岩土力学,36(12):3473-3481.
苏永华,罗正东,李翔.2012.基于均匀试验的半填半挖路基边坡稳定性灰色关联分析法[J].岩土力学,33(8):2259-2264.
谢春庆,潘凯,廖崇高,等.2017.西南某机场高填方边坡滑塌机制分析与处理措施研究[J].工程地质学报,25(4):1083-1093.
夏浩,胡新丽,唐辉明,等.2017.红外热像技术在滑坡物理模型试验中的应用[J].岩土力学,38(1):291-299.
田继雪,魏迎奇,蔡红,等.2014.极端降雨条件下高填方工程的稳定性研究[J].水利学报,45(S2):175-179.
杨校辉,朱彦鹏,周勇,等.2016.山区机场高填方边坡滑移过程时空监测与稳定性分析[J].岩石力学与工程学报,35(S2):3977-3990.
杨校辉,朱彦鹏,郭楠.2017.高填方土石混合料强度与变形特性及沉降预测研究[J].岩石力学与工程学报,36(7):1780-1790.
张硕,裴向军,黄润秋,等.2017a.黄土高填方坡体加载过程变形-力学响应特征研究[J].工程地质学报,25(3):657-670.
张硕,裴向军,黄润秋,等.2017b.降雨诱发黄土高填方支挡边坡失稳机理研究[J].工程地质学报,25(4):1094-1104.
赵建军,马运韬,蔺冰,等.2016.平缓反倾采动滑坡形成的地质力学模式研究---以贵州省马达岭滑坡为例[J].岩石力学与工程学报,35(11):2217-2224.
赵建军,余建乐,解明礼,等.2018.降雨诱发填方路堤边坡变形机制物理模拟研究[J].岩土力学,39(8):2933-2940.