摘要
文章结合闻垣高速古城联络线项目3段第三系半成岩高边坡开挖后产生的坡面裂缝、坡体坍塌、滑坡等病害问题,分析了坡面高度、坡面出露时间、坡面防护或封闭及时性、地层岩性、岩层产状、岩体物理力学指标变化等情况。结果表明:第三系半成岩边坡开挖后裸露时间过长、降雨等因素对其岩土参数降低的重要影响。为减少同类病害产生,提出公路设计过程中尽量减少该类地质高边坡设置,同时做好高边坡稳定性计算参数选取,边坡设计时着重截排水设计及边坡防护设计,施工过程中及时做好坡面防护措施。
Combined with the problems of slope surface crack,slope collapse and landslide caused by the excavation of tertiary semi-diagenetic high slope in the 3rd section of Wenyuan high-speed ancient city tie line project,this paper analyzed the slope height the emergence time of slope,the timeliness of slope protection or closure,the lithology of stratum,the occurrence of rock stratum,the change of physical and mechanical indexes of rock mass,etc.The results show that the factors such as too long exposure time and rainfall after excavation of tertiary semi-diagenetic slope have an important influence on the reduction of its geotechnical parameters,To reduce the occurrence of similar diseases,it is proposed to reduce the setting of such geological high slope as far as possible in the process of highway design.Meanwhile,the selection of high slope stability calculation parameters should be done well.In the slope design,the design of interception and drainage and slope protection should be emphasized.In the construction process,the slope protection measures should be taken in time.
出处
《内蒙古公路与运输》
2021年第3期16-18,共3页
Highways & Transportation in Inner Mongolia
关键词
第三系半成岩
高边坡
坡面出露
岩土参数
边坡设计
Tertiary semi-diagenetic
high slope
slope exposure
geotechnical parameters
slope design
