程辉, 原兴霞, 李凯玲, 曹蕊, 高洁. 2016: 黄土高填方地基动力响应数值模拟研究. 工程地质学报, 24(s1): 1140-1145. DOI: 10.13544/j.cnki.jeg.2016.s1.164
    引用本文: 程辉, 原兴霞, 李凯玲, 曹蕊, 高洁. 2016: 黄土高填方地基动力响应数值模拟研究. 工程地质学报, 24(s1): 1140-1145. DOI: 10.13544/j.cnki.jeg.2016.s1.164
    CHENG Hui, YUAN Xingxia, LI Kailing, CAO Rui, GAO Jie. 2016: NUMERICAL SIMULATION RESEARCH ON SEISMIC RESPONSE OF LOESS HIGH FILL FOUNDATION. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1140-1145. DOI: 10.13544/j.cnki.jeg.2016.s1.164
    Citation: CHENG Hui, YUAN Xingxia, LI Kailing, CAO Rui, GAO Jie. 2016: NUMERICAL SIMULATION RESEARCH ON SEISMIC RESPONSE OF LOESS HIGH FILL FOUNDATION. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1140-1145. DOI: 10.13544/j.cnki.jeg.2016.s1.164

    黄土高填方地基动力响应数值模拟研究

    NUMERICAL SIMULATION RESEARCH ON SEISMIC RESPONSE OF LOESS HIGH FILL FOUNDATION

    • 摘要: 为研究陕北某削山填沟工程形成的高填方地基的动力响应特征,利用FLAC3D数值分析工具对该填方试验场地进行了真三维动力模拟研究,分析了在自重应力及地震动力作用下,高填方地基的应力及塑性区分布特征,并对动力作用下的变形及动力响应特征进行了深入探讨。研究表明:在原场地地形坡度较大的区域,土体应力相对集中,且更易发生剪切破坏。地震作用会加剧填土层的沉降,且结合面的存在对抗震不利。建议在此类填方工程中对原场地坡体开挖台阶面,降低坡度,以增强填方土体与原地层的整体性,提高填方地基的抗震性能。

       

      Abstract: In order to study the seismic response characteristics of high fill foundation after cutting hills to backfill ditchs in northern Shaanxi.we did a seismic simulation about the filling test area with true 3D model by using FLAC3D numerical analysis tool. Analyzed the stress and the plastic zone distribution characteristics of high fill foundation under the action of gravity stress and earthquake dynamics, and carried on the deep discussion about the dynamic deformation and dynamic response characteristic under the action of the earthquake. The study shows that in the area with large slope, the stress is relatively concentrated, and shear failure occurred more often. The earthquake action will aggravate the settlement of the filling area, and the existence of the combined surface is unfavorable to the earthquake resistance. Suggested that in this kind of high fill foundation engineering, It is better to dig up the steps to reduce the slope and enhance the integrity of the fill soil and the original formation to improve the seismic performance of high fill foundation.

       

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