黑龙江科技大学学报Issue(3)：289-293,5.DOI:10.3969/j.issn.2095-7262.2015.03.013
城市道路地下空洞病害发展机理及对路面塌陷的影响
Development mechanism of cavity damage under urban roads and its influence on road surface subsidence
摘要
Abstract
This paper is concerned specifically with a deeper study addressing cavity disease—cavity damage more likely to occur under urban roads due to the external factors and even cause road surface subsidence. The study involves simulating the development and damage of cavity under urban road using distinct element software and analyzing the impact of the cavity size, buried depth, the vibration during construction, the property of soil around the cavity on the stability of the cavity. The study demonstrates that, as a result of the decrease of the cavity depth and the increase of size, the road surface is subjected to the typical subsidence tending to sharply increase, followed by a flat increase, suggesting that the point of inflexion holds the key to the road safety prediction; the occurrence of a 3-m-distance between cavity and disturbed soil necessitates the consideration of the influence of vibration during construction;and sur-face has subsidence value approximate to linear variation due to the cohesive force and the friction angle of soil to which the cavity is exposed. The study offers a new insight into failure mechanism behind the underground cavity and the resulting road surface subsidence thanks to the application of microcosmic an-gle and may provide a novel approach to investigate cavity disease.关键词
空洞/城市道路/路面塌陷/离散元Key words
cavity/urban road/road surface collapse/discrete element分类
建筑与水利引用本文复制引用
陶连金,袁松,安军海..城市道路地下空洞病害发展机理及对路面塌陷的影响[J].黑龙江科技大学学报,2015,(3):289-293,5.基金项目
国家自然科学基金项目(90715035) （90715035）
国家自然科学基金面上项目(41272337) （41272337）
国家自然科学基金创新研究群体项目(51421005) （51421005）
