高烈度地震区高边坡支挡结构振动台试验研究

doi:10.13722/j.cnki.jrme.2014.s2.050

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摘要利用振动台试验可以模拟地层受剪切波作用的现场动力条件的特点，针对位于8度高烈度地震区的玉蒙铁路的路堑高边坡工点，通过大型振动试验，对单排桩和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，对比分析单排桩和双排桩抗滑支挡结构在高边坡中的支护效果。试验结果显示，单排桩和双排桩的桩后总土压力、动土压力分布相似，均为反S形，且单排桩的总土压力、动力土压力要比双排桩相同位置的总土压力和动土压力大1.5～2.0倍；相同地震加速度下，双排桩结构的土体加速度要比单排桩结构的土体加速度小，双排桩下桩的桩顶位移要比单排桩的桩顶位移小。说明对于高烈度地震区高边坡的加固，双排桩支挡结构的支护效果明显好于单排桩支挡结构。

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	刘昌清1
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	蒋楚生3
	梁瑶3
	李想1
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关键词 ：边坡工程, 高烈度地震区, 振动台试验, 高边坡, 支挡结构

Abstract：Based on the worksite of Yuxi to Mengzi railway which is located on the strong seismic region of 8 degree intensity，the shaking table test was carried out to simulate the dynamic field situation caused by shear wave. The force acting on the pile，the acceleration in the soil and the deformation at pile top of single pile and double row pile retaining structure under different earthquake accelerations are tested. And the comparisons of support effect for the single pile and the double row pile anti-slide structure are analyzed. It shows that distribution of the total earth pressures and the dynamic earth pressures acting on the back of the piles are the same. And the value of single pile is 1.5 to 2 times greater than that of double row pile structure for the same position. Under the same earthquake acceleration，the peaks of acceleration in the soil of single pile structure is greater than that of double row structure，and the settlement of pile top at the low pile of double pile structure is less than that of single pile structure. The support effect of double row pile retaining structure is better than single pile retaining structure on strong seismic region.

Key words： slope engineering strong seismic region shaking table test high slope retaining structure

引用本文:

刘昌清1，2，蒋楚生3，梁瑶3，李想1，2. 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(S2): 3798-3802.
LIU Changqing1，2，JIANG Chusheng3，LIANG Yao3，LI Xiang1，2. STUDY OF SHAKING TABLE TEST FOR HIGH SLOPE RETAINING STRUCTURE ON HIGHLY SEISMIC REGION. , 2014, 33(S2): 3798-3802.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.s2.050 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/IS2/3798

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