文档介绍：上海交通大学
硕士学位论文
人为扰动下路堑边坡稳定性研究
姓名:周园
申请学位级别:硕士
专业:防灾减灾工程及防护工程
指导教师:邢爱国
20080201
上海交通大学硕士学位论文人为扰动下路堑边坡稳定性研究摘要
人为扰动下路堑边坡稳定性研究
摘要
随着交通建设向山区的不断延伸,人类工程活动开挖切坡形成了大
量的路堑边坡。我国山区地层风化深度大,覆盖层较厚,岩体结构破
碎,而路堑边坡时常受到诸如开挖、爆破、交通荷载等一些人为扰动影
响,使得路堑边坡工程问题显得尤为突出。本文采用数值模拟分析方
法,分别对边坡开挖过程、边坡在爆破荷载及交通荷载作用下的动力响
应规律进行研究,主要内容如下:
(1) 结合工程实例对边坡分步开挖过程进行了模拟分析,得出了整个
坡体的位移场、应力场和塑性区的分布规律以及边坡在开挖过程中的变
形特征,通过选取合理的失稳判据确定边坡的稳定状态及破坏力学模
式,从而为边坡开挖施工监测提供依据。
(2) 对路堑边坡在爆破荷载作用下的动力响应进行了模拟,得出了
边坡不同部位的速度、应力时程曲线,分析了爆破振动在坡体中传播引
起的应力场、位移场的分布规律,总结了边坡爆破应力波在传播过程中
的衰减规律,以指导施工。
(3) 结合工程实例分别在坡脚附近施加公路荷载和铁路荷载进行数
值模拟,得出了路堑边坡在不同交通荷载作用下位移及速度动态响应规
律,为路堑边坡的设计和加固提供理论依据。

关键词:路堑边坡,开挖,稳定性,爆破荷载,交通荷载,动力响应
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上海交通大学硕士学位论文人为扰动下路堑边坡稳定性研究摘要
RESEARCH ON THE STABILITY OF CUT SLOPE UNDER
HUMAN-INDUCED DISTURBANCE

ABSTRACT

With traffic construction developing to mountain areas, lots of cut slope
has formed by human engineering activities. Because of human activities,
such as excavation blasting and traffic, in addition with strongly weathered
rock mass, thick over-burden and fragmental rock structure, cut slope stability
has e a striking problem. Based on numeric simulation analysis
method, some research is done on the stability of slope excavation and
dynamic response of slope under blasting load and traffic load. The main
contents are as follows:
(1) Simulating the process of staged excavation with engineering
instance, obtaining displacement distribution , stress field, plastic zones and
deformation features in the whole slope during staged excavation, checking
the state of slope stability and destruction pattern by rationally selected
instability criteria, offering the basis for digging construction and
monitoring.
(2) Simulating the dynamic response of slope under blasting load,
obtaining velocity histories and stress histories in different position of slope,
analyzing the distribution of stress field and displacement field induced by
the propagat