某电厂工程场址地质灾害防治工程研究
摘要:建设工程场址紧邻某露天矿北采坑,最近距离不足10 m,且在场址地基中连续分布厚1.5~3.0 m软弱夹层,该软弱夹层南倾并出露于露天采坑边坡,与采坑边坡构成顺向坡。因该场址所处周边环境的特殊性以及特定的地层结构,使得本工程可能遭受场地整体滑移、边坡滑动等地质灾害威胁,且危害后果严重。对场址地基整体稳定性验算与采坑边坡稳定性的计算表明:场址地基整体稳定性可满足规范要求,而采坑高边坡则处于不稳定状态,必须进行工程加固。综合考虑本场区地层结构、周边环境与危害后果等,提出了削坡减载+预应力格构锚固主体加固方案,同时辅以截排水与工程监测措施。依据锚固段岩土体力学特性,确定了各锚杆锚固力,采用Winkler弹性地基梁和连续梁模型计算了格构梁的内力。对削坡、锚固后边坡的稳定性验算表明:其安全稳定性可满足规范要求。
Abstract:The construction project site is close to the north open-pit of a mine,the minimum distance less than 10 m to the open-pit boundary. In addition,a thickness of 1.5~3.0 m weak interlayer is distributed continuously in the site foundation,and exposed on the open-pit slope. The weak interlayer and the open-pit slop constitutes a bedding slope. Because of the special surrounding environment and the structure of foundation,the project maybe suffer geological disasters risks,such as site integral slipping and landslide,and the harmful consequences is very serious. According to the calculation results of the site integral stability and the open-pit slope stability,the weak interlayer safety factor can meet the technical code,and the open-pit slope is in instability and must be reinforced. Considering the site stratigraphic structure and surrounding environmentect,a comprehensive prevention scheme is proposed,including cutting slope and reducing load,pretesting frame anchor,drainage system and engineering monitoring. In accordance with the mechanical properties of rock and soil mass in anchorage section,the anchorage force is determined. The internal forces of the lattice beams are calculated by the models of Winkler foundation elastic beam and continuous beam. After cutting slope and anchoring,the slope stability checking express that the safety factor can satisfy the technical code.
中文标题：
某电厂工程场址地质灾害防治工程研究
Research on Geological Hazards and Prevention Engineering of a Power Plant Project Site
作者：
祝启坤1,张进超1,盛建豪2
Zhu Qikun1,Zhang Jinchao1,Sheng Jianhao2
作者简介:祝启坤,1963年生,男,汉族,河南信阳人,硕士,教授,主要从事岩土工程加固与地质灾害防治方面的教学和研究工作。E-mail:Hyzqk@163.com
通讯地址：
1. 武汉工程大学环境与城市建设学院, 湖北武汉 430073; 2. 中国科学院武汉岩土力学研究所, 湖北武汉 430071
1.SchoolofEnvironmentandCivilEngineering,WuhanInstituteofTechnology,Wuhan430073,Hubei,China; 2.InstituteofRockandSoilMechanics,ChineseAcademyofSciences,Wuhan430071,Hubei,China
中图分类号:P642.2
doi:10.3969/j.issn.1007-2993.2013.06.008
出版物：岩土工程技术
收稿日期:2013-06-24
关键词:地质灾害,稳定性评价,削坡,格构锚固,截排水
Key words:geological hazards,stability assessment,cutting slope,framed anchor,drainage system
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