浅层压力注浆法加固风化岩质边坡及加固效果分析  

Effective Analysis on Applying Grouting Method to Stabilize Weathered Rock Slope

作　　者：刘润[1] 闫玥[1] 闫澍旺[1] 罗强[2] 龙万学[2] 周勇[2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]贵州省交通规划勘察设计研究院,贵阳550001

出　　处：《天津大学学报》2006年第5期532-536,共5页Journal of Tianjin University(Science and Technology)

摘　　要：阐述了采用浅层压力注浆法加固强风化岩质边坡和岩堆的成功工程实例,借助弹塑性有限元分析方法, 研究了岩质边坡实施浅层压力注浆后,边坡中的位移场变化、边坡的安全系数、岩土体强度参数的增长程度以及压力注浆法取得显著加固效果的原因．分析结果表明,经注浆加固后边坡表层岩土体的力学性质得到了明显改善,同时改变了边坡失稳时潜在滑动面的位置,提高了边坡稳定的安全系数;经注浆加固后岩土体的强度指标明显增长．Applying grouting method to strengthening weathered rock slopes and rock piles can greatly reduce the earthwork of excavation and efficiently prevent the environment from being destroyed. Since the original slope surface have been reserved, it is unnecessary to construct conventional carved rock-slice on the slope and it is easy to take some measurements to recovery and develop the ecological environment. Two successful slope reinforcement projects with grouting method have been finished and depicted in this paper. One is heavily weathered rock slope and the other is rock pile. Based on the engineering practice, an elasto-plastie finite element program has been applied to study the soil behavior before and after grouting, the change of safety factor, the displacement field distribution and the mechanism of slope reinforcement. The analytical results show that the strength of the soil increases after grouting. The position of the possible sliding surface is changed and the safety factor of the slope stabilization is improved because of the increment of the upper soil strengthen. As a resuit, the grouting method can improve the strength of the soil and prevent the slope from sliding effectively.

关 键 词：边坡加固 压力注浆 渐进破坏 强度参数 有限元法 

分 类 号：TU457[建筑科学—岩土工程]