Numerical Analysis and Laboratory Experiment of Rapid Restoration of Underground Cavity Using Expansive Material without Excavation

IF 0.4 Q4 ENGINEERING, GEOLOGICAL Journal of the Korean Geosynthetic Society Pub Date : 2018-01-01 DOI:10.12814/JKGSS.2018.17.1.055
Kicheol Lee, Byeong-Hyun Choi, Jongho Park, Dongwook Kim
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引用次数: 4

Abstract

The purpose of this study is to evaluate the suitability of emergency underground cavity restoration method filling cavity with expansive material based on numerical analysis. For the numerical analysis, experiments were conducted to evaluate properties of expansive material. Based on the measured expansion pressure of the expansive material from the experiment, behavior of underground cavity restoration with various cavity dimensions (variation of height and width of rectangular-shape cavity) was numerically assessed. As a result of analysis, the vertical displacements of the top and bottom of cavity were significantly influenced by the cavity width and lateral displacements of cavity sides were highly dependent on cavity height. These vertical and lateral displacements were increased with increasing expansion pressure of expansive material. Also, when the expansion pressure was applied, the vertical displacement of the upper surface layer of the road was less dependent on cavity height, and was greatly influenced by cavity width.
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膨胀材料不开挖快速修复地下洞室的数值分析与室内试验
本研究的目的是在数值分析的基础上,评价膨胀材料充填地下空腔应急修复方法的适用性。为了进行数值分析,对膨胀材料的性能进行了实验研究。基于试验中实测膨胀材料的膨胀压力,对不同空腔尺寸(矩形空腔高度和宽度的变化)下的地下空腔修复行为进行了数值评价。分析结果表明,空腔宽度对空腔顶部和底部的垂直位移影响较大,而空腔两侧的侧向位移则高度依赖于空腔高度。随着膨胀材料膨胀压力的增大,垂直位移和侧向位移均增大。施加膨胀压力时,路面上表层垂直位移受空腔高度的影响较小,受空腔宽度的影响较大。
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