摘要
以印尼某火电厂人工边坡防治工程为依托,选择典型挖方和填方断面,利用地质分析结合数值分析的方法,探讨其破坏机理和破坏模式,提出针对性加固措施,总结普适性经验,为厂区同类边坡的安全控制提供经验和技术支撑,所得主要结论如下:挖方边坡以沿土岩界面小范围滑移和沿坡脚整体滑移两种模式破坏,这是土岩变形特性差异、渗透特性差异、全风化泥岩易扰动特性综合造成的;填方边坡以沿着填筑体和自然地形结合部位带动部分自然地层一起变形运动破坏为主,是填筑体自身施工质量和自然土体承载能力综合作用形成;坡率小于1∶1.5,采取3 m×3 m预应力锚索格构加固坡面,可以实现挖方边坡和填方边坡的稳定控制,提出了针对挖方边坡和填方边坡的普适性综合安全控制措施。
Based on the artificial slope control project of a thermal power plant in Indonesia,the typical excavation and filling sections are selected,and the failure mechanism and failure mode were discussed by using the method of geological analysis and numerical analysis,after which and reinforcement measures was proposed.This paper also summarized the general experience,which could provide experience and technical support for safety control of similar slopes in the plant area,The main conclusions are as follows.The excavation slope is damaged by two modes of small-scale sliding along the soil rock interface and overall sliding along the slope toe,which is caused by the difference of deformation characteristics,permeability characteristics and the easily disturbed characteristics of completely weathered mudstone.The filling slope is mainly driven by the deformation and movement of some natural strata along the joint of the filling body and the natural terrain,which is the comprehensive effect of the construction quality of the filling body and the bearing capacity of the natural soil.When the slope ratio is less than 1∶1.5,the stability control of the excavation slope and the filling slope can be realized by adopting 3 m×3 m prestressed anchor cable lattice to reinforce the slope.The general comprehensive safety control measures for excavation slope and refilling slope are proposed.
作者
周庆科
夏建国
ZHOU Qingke;XIA Jianguo(China Huadian Hongkang Company Limited,Beijing 100035,China;Central Southen China Electric Power Design Institute Co.Ltd.of China Power Engineering Consulting Group,Wuhan,Hubei 430071,China)
出处
《水利与建筑工程学报》
2020年第5期226-230,共5页
Journal of Water Resources and Architectural Engineering
关键词
挖方边坡
填方边坡
地质分析
数值分析
破坏模式
锚索格构加固
普适性综合安全控制措施
excavation slope
refilling slope
geological analysis
numerical analysis
fail mode
reinforcement of anchor and lattice
comprehensive safety control measures with universality
