广东省广佛工程地质特征及地质灾害危险性预测
Geological characteristics and geological hazard prediction in Guangfo project,Guangdong Province
余之盈1
作者信息
- 1. 广东省核工业地质调查院,广东 广州 510800
- 折叠
摘要
广佛工程区大地构造位于华南准台地,远离区域性断裂带,地质背景条件简单,适宜工程建设.区内已发育崩塌地质灾害 8 处,大部分位于人工开挖道路边坡或人工削坡建房处,崩塌体体积 15～75 m3,均为微型崩塌,危险性小.在工程建设中可能引发挖方边坡崩塌或滑坡、填方边坡崩塌或滑坡地质灾害.挖方边坡上部为土质边坡,在天然工况下为稳定状态,在饱和工况下为不稳定状态;挖方边坡下部为强—微风化花岗岩质边坡,由于节理发育易产生滑动,发生崩塌或滑坡的可能性较高.填方边坡高≤10.0 m处于稳定状态,发生崩塌或滑坡的可能性低;填方边坡高20.0～30.0 m处于一般稳定状态,发生崩塌或滑坡的可能性一般;填方边坡高≥30.0 m处于不稳定状态,发生崩塌或滑坡的可能性高.
Abstract
The geotectonic structure of the Guangfo project area is located in South China quasi-platform,far away from the regional fault zone,with simple geological background conditions,which is suitable for construction of the project.There are 8 developed collapse in the area,most of which are located in the artificially excavated road slope or the artificially cut slope building,and the volume of the collapse body is 15～75 m3,all of them are micro-collapses,with small risk.Geological hazards may be triggered by excavated slope collapse or landslide and fill side slope collapse or landslide during engineering construction.The upper part of the excavated slope is a soil slope,which is stable under natural conditions and unstable under saturated conditions.The lower part of the excavated slope is a strong and slightly weathered granite slope,which is prone to sliding due to the joints development,and the possibility of collapse or landslide is high.The fill slopes less than 10.0 m in height are stable,with a low probability of collapse or landslide;the fill slopes 20.0～30.0 m in height are in a general stable state,with an average probability of collapse or landslide;the fill slopes greater than 30.0m in height are in an unstable state,with a high probability of collapse or landslide.
关键词
产业园/工程地质/地质灾害/危险Key words
industrial park/engineering geology/geological disasters/risk引用本文复制引用
出版年
2024
NETL
NSTL
万方数据