摘要
公园城市建设过程中,在低洼沟谷内,由挖方弃土未经碾压堆载形成的填方边坡,往往由于地质结构特点、施工工序、施工方式等,造成边坡失稳形成灾害。该文以成都空港新城某在建生态公园失稳边坡为例,分析了其地质结构、变形特征和变形过程,认为其失稳原因主要是“先开挖后回填”的施工工序不当,造成前缘临空,为软塑状粉质黏土软弱层提供了挤出空间和滑移空间。滑坡发生以后,采用了“削坡减载”的综合措施进行处理。该案例可为类似边坡和相关工程提供借鉴。
There are many filled slopes in low-lying gully,which are formed by excavated unrolled stacking waste soil in the process of park city construction.These slopes are often unstable because of geological structure,construction procedures and methods.Taking unstable slope of an ecological park under construction in Chengdu Airport New City as an example,the geological structure,deformation characteristics and deformation process of the slope are analyzed.It concludes that the main reason for its instability is the leading edge void caused by the improper construction process arrangement of“excavation first and backfill later”,which provides extrusion and slip space for the soft plastic silty clay layer.The comprehensive treatment measure of“slope cutting and load reduction”is adopted after the sliding.This case can provide reference for similar slopes and related projects.
作者
赵勇
高晓峰
李佳龙
何朝阳
Zhao Yong;Gao Xiaofeng;Li Jialong;He Chaoyang(Chengdu Surveying Geotechnical Research Institute Corporation Limited of MCC;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology)
出处
《勘察科学技术》
2023年第6期35-37,64,共4页
Site Investigation Science and Technology
关键词
公园型城市
景观边坡
施工工序
削坡减载
park city
landscape slope
construction procedure
slope cutting and load reduction
