常见边坡支护形式的地震稳定性对比分析
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摘要
为了对比分析抗滑桩、抗滑桩加预应力锚索、格构梁加预应力锚索这3种边坡支护形式的地震稳定性,建立了相应的数值模型进行计算分析。计算结果显示:3种支护形式在地震作用后,边坡变形及稳定性系数的衰减幅度基本一致,其中格构梁加预应力锚索的衰减程度略弱,从结构受力放大倍数来看,抗滑桩支护形式的结构受力放大程度明显高于其余2种支护形式。计算结果还显示预应力锚索不仅能够提高边坡的稳定性,而且能够抑制支护结构内力的放大,从而提高支护结构的安全性能。
To perform a comparative analysis of seismic stability on a common slope support form,the corresponding numerical model for the following was established:a comparative analysis pile,apile with pre-stressed anchor,and lattice beams with pre-stressed anchor.The seismic stabilities of these three kinds of support form were then calculated.The results show that,after the earthquake,the three kinds of support form are basically the same,along with the amplitude attenuation coefficient of slope stability and deformation,although the attenuation of lattice beams with pre-stressed anchor was slightly weaker.From the magnification of the force structure perspective,the force amplification level of the anti-slide pile was significantly higher than those of the two other kinds of support form.Furthermore,the pre-stressed anchor not only improved slope stability,the supporting structure can also enlarge the internal force,thereby enhancing the safety performance of the support structure.These conclusions can provide references for the choice of slope support form in the earthquake zone.
To perform a comparative analysis of seismic stability on a common slope support form,the corresponding numerical model for the following was established:a comparative analysis pile,apile with pre-stressed anchor,and lattice beams with pre-stressed anchor.The seismic stabilities of these three kinds of support form were then calculated.The results show that,after the earthquake,the three kinds of support form are basically the same,along with the amplitude attenuation coefficient of slope stability and deformation,although the attenuation of lattice beams with pre-stressed anchor was slightly weaker.From the magnification of the force structure perspective,the force amplification level of the anti-slide pile was significantly higher than those of the two other kinds of support form.Furthermore,the pre-stressed anchor not only improved slope stability,the supporting structure can also enlarge the internal force,thereby enhancing the safety performance of the support structure.These conclusions can provide references for the choice of slope support form in the earthquake zone.
引文
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[12]文畅平,江学良,杨果林,等.二级支护边坡重力式挡墙地震动力特性的振动台试验研究[J].振动工程学报,2014,27(3):426-432.WEN Chang-ping,JIANG Xue-liang,YANG Guo-lin,et al.Gravity Retaining Wall Slope Dynamic Characteristics of the Earthquake Vibration Table Test of the Secondary Support[J].Vibration Engineering,2014,27(3):426-432.(in Chinese)
[13]文畅平.多级支挡结构地震主动土压力的极限分析[J].岩土力学,2013,34(11):3205-3212.WEN Chang-ping.Multistage Retaining Structures Seismic Active Earth Pressure Limit[J].Rock and Soil Mechanics,2013,34(11):3205-3212.(in Chinese)
[14]许江波,郑颖人,叶海林,等.埋入式抗滑桩支护地震边坡研究[J].地下空间与工程学报,2011,7(4):781-788.XU Jiang-bo,ZHENG Ying-ren,YE Hai-lin,et al.Seismic Slope Embedded Anti-slide Pile Retaining[J].Underground Space and Engineering,2011,7(4):781-788.
[15]赖杰,郑颖人,刘云,等.地震作用下双排抗滑桩支护边坡振动台试验研究[J].岩土工程学报,2014,4:680-686.LAI Jie,ZHENG Ying-ren,LIU Yun,et al.Double Anti-sliding Pile Retaining Shaking Table Test Slope under Earthquake[J].Geotechnical Engineering,2014,36(4):680-686.(in Chinese)
[16]邵勇,阎长虹,许宝田.土坡地震稳定性影响因素分析[J].煤田地质与勘探,2010,38(5):47-49,54.SHAO Yong,YAN Chang-hong,XU Bao-tian.Analysis of Influencing Factors for Soil Slope Seismic Stability[J].Coal Geology&Exploration,2010,38(5):47-49,54.(in Chinese)
[17]秦凤艳,戈海玉,郝成伟,等.基覆边坡地震稳定性分析[J].世界地震工程,2015,31(2):156-161.QIN Feng-yan,GE Hai-yu,HAO Cheng-wei,et al.Based Cladding Slope Seismic Stability Analysis[J].World Earthquake Engineering,2015,31(2):156-161.(in Chinese)
[2]言志信,张刘平,江平,等.锚固上覆红黏土岩体边坡的地震动力响应[J].岩土力学,2014,35(3):753-758.YAN Zhi-xin,ZHANG Liu-ping,JIANG Ping,et al.Earthquake Power red Clay Overlying Rock Slope on the Anchor Response[J].Soil Mechanics,2014,35(3):753-758.(in Chinese)
[3]程刚,孙志峰,杨海清,等.支挡结构的震损快速评估方法研究[J].公路工程,2014,39(2):238-241,250.CHENG Gang,SUN Zhi-feng,YANG Hai-qing,et al.Method of Rapid Assessment Study of Earthquake Damaged Retaining Structures[J].Highway Engineering,2014,39(2):238-241,250.(in Chinese)
[4]刘昌清,蒋楚生,梁瑶,等.高烈度地震区高边坡支挡结构振动台试验研究[J].岩石力学与工程学报,2014,33(增刊2):3798-3802.LIU Chang-qing,JIANG Chu-sheng,LIANG Yao,et al.Slope Retaining Structures Shaking Table Test Research[J].High Highly Seismic Area of Rock Mechanics and Engineering,2014,33(Supp2):3798-3802.(in Chinese)
[5]王兰民,吴志坚.岷县漳县6.6级地震震害特征及其启示[J].地震工程学报,2013,35(3):401-412.WANG Lan-min,WU Zhi-jian.Earthquake Damage Characteristics of the Minxian-Zhangxian MS6.6Earthquake and Its Lessons[J].China Earthquake Engineering Journal,2013,35(3):401-412.(in Chinese)
[6]杨果林,申权,杨啸,等.基覆边坡支挡结构的加速度放大系数数值与试验研究[J].岩石力学与工程学报,2015,34(2):374-381.YANG Guo-lin,SHEN Quan,YANG Xiao,et al.Based Cladding Acceleration Slope Retaining Structures Numerical and Experimental Study Coefficient[J].Enlarge Rock Mechanics and Engineering,2015,34(2):374-381.(in Chinese)
[7]雷天,吴志坚,陈拓.天水市某典型黄土边坡块石支护稳定性效果分析[J].地震工程学报,2014,36(4):968-974.LEI Tian,WU Zhi-jian,CHEN Tuo.The Effect Analysis of Supporting Stability by Stone in Tianshui City[J].China Earthquake Engineering Journal,2014,36(4):968-974.(in Chinese)
[8]杨果林,文畅平.格构锚固边坡地震响应的振动台试验研究[J].中南大学学报:自然科学版,2012,43(4):1482-1493.YANG Guo-lin,WEN Chang-ping.Shaking Table Test of Wen Chang Ping Trellis Anchored Slope Seismic Response[J].Central South University:Natural Science,2012,43(4):1482-1493.(in Chinese)
[9]赖杰,李安红,郑颖人,等.锚杆抗滑桩加固边坡工程动力稳定性分析[J].地震工程学报,2014,36(4):924-930.LAI Jie,LI An-hong,ZHENG Ying-ren,et al.Dynamic Stability Analysis of Slope Reinforced with Piles and Cable[J].China Earthquake Engineering Journal,2014,36(4):924-930.(in Chinese)
[10]董建华,张媛,朱彦鹏,等.框架预应力锚杆边坡锚固结构的随机地震反应及动力可靠度分析[J].中国公路学报,2015,28(10):26-33.DONG Jian-hua,ZHANG Yuan,ZHU Yan-peng,et al.Reliability Analysis[J].Random Seismic Response and Dynamic Framework for Slope Prestressed Anchor Anchorage Structure of Chinese Road Sinica,2015,28(10):26-33.(in Chinese)
[11]董建华,朱彦鹏,马巍.地震作用下框架预应力锚杆边坡锚固结构的动力计算方法[J].岩石力学与工程学报,2014(增刊1):3135-3143.DONG Jian-hua,ZHU Yan-peng,MA Wei.Dynamic Calculation under Seismic Slope Prestressed Anchor Frame Anchor Structure[J].Rock Mechanics and Engineering,2014(Supp1):3135-3143.
[12]文畅平,江学良,杨果林,等.二级支护边坡重力式挡墙地震动力特性的振动台试验研究[J].振动工程学报,2014,27(3):426-432.WEN Chang-ping,JIANG Xue-liang,YANG Guo-lin,et al.Gravity Retaining Wall Slope Dynamic Characteristics of the Earthquake Vibration Table Test of the Secondary Support[J].Vibration Engineering,2014,27(3):426-432.(in Chinese)
[13]文畅平.多级支挡结构地震主动土压力的极限分析[J].岩土力学,2013,34(11):3205-3212.WEN Chang-ping.Multistage Retaining Structures Seismic Active Earth Pressure Limit[J].Rock and Soil Mechanics,2013,34(11):3205-3212.(in Chinese)
[14]许江波,郑颖人,叶海林,等.埋入式抗滑桩支护地震边坡研究[J].地下空间与工程学报,2011,7(4):781-788.XU Jiang-bo,ZHENG Ying-ren,YE Hai-lin,et al.Seismic Slope Embedded Anti-slide Pile Retaining[J].Underground Space and Engineering,2011,7(4):781-788.
[15]赖杰,郑颖人,刘云,等.地震作用下双排抗滑桩支护边坡振动台试验研究[J].岩土工程学报,2014,4:680-686.LAI Jie,ZHENG Ying-ren,LIU Yun,et al.Double Anti-sliding Pile Retaining Shaking Table Test Slope under Earthquake[J].Geotechnical Engineering,2014,36(4):680-686.(in Chinese)
[16]邵勇,阎长虹,许宝田.土坡地震稳定性影响因素分析[J].煤田地质与勘探,2010,38(5):47-49,54.SHAO Yong,YAN Chang-hong,XU Bao-tian.Analysis of Influencing Factors for Soil Slope Seismic Stability[J].Coal Geology&Exploration,2010,38(5):47-49,54.(in Chinese)
[17]秦凤艳,戈海玉,郝成伟,等.基覆边坡地震稳定性分析[J].世界地震工程,2015,31(2):156-161.QIN Feng-yan,GE Hai-yu,HAO Cheng-wei,et al.Based Cladding Slope Seismic Stability Analysis[J].World Earthquake Engineering,2015,31(2):156-161.(in Chinese)