双排桩支挡结构振动台模型试验与分析
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摘要
以玉蒙铁路DK125+20高路堑边坡工点为参考研究对象,通过大型振动台模型试验对双排桩支挡结构在不同地震加速度条件下的桩身受力、土体加速度、桩顶位移情况进行测试,进而分析双排桩支挡结构在高边坡中的支护效果。试验结果显示,双排桩支挡结构试验模型中桩后总土压力随地震加速度峰值增加而增加,且下排桩增幅大于上排桩;土体加速度随高度增加而增加,且震级越大,增加速率越大;当地震烈度达到9度时,双排桩支挡结构的支护效果也是理想的。
Based on the worksite of double row pile retaining structure in the Yuxi to Mengzhi Railway,this paper takes out the shaking table test to analyze the force acting on the pile,the acceleration in the soil and the deformation at pile top of the double pile structure under different earthquake acceleration.And the support effect of the double row pile structure was analyzed.It shows that total force acting on the back of the pile is increase with the increasing of the earthquake acceleration,and the increment of the total force is greater on the lower pile than that on the upper pile.The peaks of acceleration in the soil are increased with the height of the soil in the model,and the greater the earthquake acceleration,the greater the increment.Even in the earthquake intensity up to 9th level,the support effect of double row pile retaining structure is still perfect.
Based on the worksite of double row pile retaining structure in the Yuxi to Mengzhi Railway,this paper takes out the shaking table test to analyze the force acting on the pile,the acceleration in the soil and the deformation at pile top of the double pile structure under different earthquake acceleration.And the support effect of the double row pile structure was analyzed.It shows that total force acting on the back of the pile is increase with the increasing of the earthquake acceleration,and the increment of the total force is greater on the lower pile than that on the upper pile.The peaks of acceleration in the soil are increased with the height of the soil in the model,and the greater the earthquake acceleration,the greater the increment.Even in the earthquake intensity up to 9th level,the support effect of double row pile retaining structure is still perfect.
引文
[1]刘新荣,梁宁慧,黄金国,等.抗滑桩在边坡工程中的研究进展及应用[J].中国地质灾害与防治学报,2006,17(1):56-62(Liang Xinrong,Liang Ninghui,Huang Jinguo,et al.Progress and applications of anti-sliding piles in slopereinforcing projects[J].The Chinese Journal of GeologicalHazard and Control,2006,17(1):56-62(in Chinese))
[2]姚旭东.双排桩支挡结构试验与数值分析[D].成都:西南交通大学,2008(Yao Xudong.The numericalanalysis and test of retaining structure with two rows of piles[D].Chengdu:Southwest Jiaotong University,2008(inChinese))
[3]仵锋锋,曹平,万琳辉.相似理论及其在模拟试验中的应用[J].采矿技术,2007,7(4):64-65,78
[4]严珍珍,张怀,杨长春,等.汶川大地震地震波传播的谱元法数值模拟研究[J].中国科学(D辑:地球科学),2009,39(4):393-402
[5]TB 10025—2006铁路路基支挡结构设计规范[S].北京:中国铁道出版社,2006:25-47(TB10025—2006 Codefor design on retaining structures of railway subgrade[S].Beijing:China Railway Publishing House,2006:25-47(inChinese))
[6]李海光.新型支挡结构设计与工程实例[M].北京:人民交通出版社,2004:230
[2]姚旭东.双排桩支挡结构试验与数值分析[D].成都:西南交通大学,2008(Yao Xudong.The numericalanalysis and test of retaining structure with two rows of piles[D].Chengdu:Southwest Jiaotong University,2008(inChinese))
[3]仵锋锋,曹平,万琳辉.相似理论及其在模拟试验中的应用[J].采矿技术,2007,7(4):64-65,78
[4]严珍珍,张怀,杨长春,等.汶川大地震地震波传播的谱元法数值模拟研究[J].中国科学(D辑:地球科学),2009,39(4):393-402
[5]TB 10025—2006铁路路基支挡结构设计规范[S].北京:中国铁道出版社,2006:25-47(TB10025—2006 Codefor design on retaining structures of railway subgrade[S].Beijing:China Railway Publishing House,2006:25-47(inChinese))
[6]李海光.新型支挡结构设计与工程实例[M].北京:人民交通出版社,2004:230
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