即有洞穴对道路沉降的影响研究

来源 :天津大学 | 被引量 : 0次 | 上传用户:fazaizhaoyun
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Roadway settlement caused by either movement of the underlying surface due to previous existing mine site, cut and cover tunnel etc. are one of the common and reoccurring problems along highways, state roads, country roads, and local roads. Such incidents cause significant problems that may include lane and/or road closure, interruption to the public normal way of life, construction delays and interruption to construction schedule. This research uses FEM to examine surface and the subsurface settlement profile caused by the previous mining activity. In the analysis, the influence of the size, shape and buried depth of the hole, as well as the height of the embankment, are considered. The results of this soil models confirm the empirical solution originally proposed by Peck (1969) that the surface settlement trough conforms to the normal probability curve. Only the max settlement and inflection points were somewhat different. The measured data also confirms previous studies and field measurements by Peck (1969), O’Reilly and New (1982) and Lake et al. (1992) suggestion that i is independent of the volume loss and linearly proportional to the tunnel depth.
其他文献
虾青素是一种类胡萝卜素,具有抗氧化、刺激免疫、防止癌变、消除自由基、保护生物膜及防止心血管疾病等特殊的生理功能,在食品、饲料、化妆品及医药行业的应用越来越受到人们的重视。但目前国内这一产业还未能实现,主要原因是法夫酵母生产菌株虾青素产量较低,与工业化生产的要求尚有一定距离,如何进行法夫酵母的高密度培养是当前虾青素工业化生产开发的制约因素。为了进一步提高虾青素的产量,本文从生物反应过程控制的角度,对
请下载后查看,本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view profile.
期刊
我今年89岁,和摄影结缘有70多个年头了,我的家庭照片都珍贵地保存着。我参加八路军时还是个十几岁的孩子,“两个小八路”这张照片是黄敬给我们拍的,我给他当了4年警卫员,我用