| 夯土长城墙体掏蚀失稳机理研究 |
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| 引用本文： | 王旭东,石玉成,刘琨. 夯土长城墙体掏蚀失稳机理研究[J]. 地震工程学报, 2011, 33(Z1) |
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| 作者姓名： | 王旭东 石玉成 刘琨 |
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| 作者单位： | 1. 敦煌研究院,甘肃敦煌,732600
2. 中国地震局兰州地震研究所,甘肃兰州,730000 |
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| 基金项目： | 甘肃省科技支撑计划项目(0708NKCF089) |
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| 摘 要： | 基于明代夯土长城甘肃山丹段的野外现场调查和室内试验建立了夯土长城掏蚀墙体稳定性分析模型和动力时程分析模型,计算分析了夯土墙体在自重和地震作用下墙体的稳定系数和动力响应规律。结果表明:在自重作用下掏蚀墙体稳定系数是掏蚀深度的二次函数,山丹段墙体在自重作用下处于稳定状态,墙体最大掏蚀深度为0.778 m;山丹段墙体掏蚀深度小于极限掏蚀深度,仍能抵御8度地震作用;夯土墙体峰值加速度最大值出现在墙体掏蚀部位顶侧,比墙根峰值加速度大1.28倍。本文研究成果可为河西地区土遗址保护提供参考。
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| 关 键 词： | 根基掏蚀 夯土长城 稳定系数 抗倾覆计算 |
Research on Sapping Instability Mechanism for Rammed Wall |
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| WANG Xu-dong ,SHI Yu-cheng ,LIU Kun. Research on Sapping Instability Mechanism for Rammed Wall[J]. China Earthguake Engineering Journal, 2011, 33(Z1) |
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| Authors: | WANG Xu-dong SHI Yu-cheng LIU Kun |
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| Affiliation: | WANG Xu-dong 1,SHI Yu-cheng 2,LIU Kun 2(1.DunhuangAcademyy,GansuDunhuang,736200,China,2.LanzhouInstituteofSeismology,CEA,Lanzhou 730000,China) |
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| Abstract: | Based on the filed study on the rammed Great Wall made in Ming Dynasty at Shandan section in Gansu province and lab test,the stability analysis model of sapping rammed wall and dynamical time-history analysis modle are built,in which the stability coefficient and dynamic response of the rammed wall under the self-weight and seismic action is researched.The results show that:(1)the stability coefficient of sapping wall is quadratic function of sapping depth under self-weight action,the wall in Shandan sectio... |
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| Keywords: | Basal sapping Rammed Great Wall Stability coefficient Resistive overturning calculation |
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