强风化岩质边坡滑坡治理及有限元分析

第25卷 增1

岩石力学与工程学报 V ol.25 Supp.1

2006年2月 Chinese Journal of Rock Mechanics and Engineering Feb.，2006

收稿日期：2005–10–31；修回日期：2005–12–25

作者简介：刘 润(1974–)，女，博士，1996年毕业于天津大学土木工程系结构工程专业，现为副教授，主要从事岩土工程方面的教学与研究工作。E-mail ：liurun74@

强风化岩质边坡滑坡治理及有限元分析

刘 润1，闫 玥1，闫澍旺1，徐 余1，罗 强2，龙万学2，周 勇2

(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，贵州 贵阳 550001)

摘要：采用浅层压力灌浆法加固边坡，可以减少边坡的开挖和由此而带来的对环境的破坏；边坡经过灌浆法治理后，坡面无需进行传统的浆砌片石等防护，可保留原始坡表，从而易于进行生态建设和恢复。详细阐述采用压力灌浆法治理强风化岩质边坡滑坡的典型工程实例和加固效果的检测结果。借助弹塑性有限元分析方法，对比灌浆加固前后边坡岩土体的受力情况，由分析结果可知，压力灌浆后表层岩土体的物理力学性质得到改善，阻止边坡滑动机制的初期形成与发展，从而提高边坡的稳定性。 关键词：岩石力学；岩质边坡；稳定性；压力灌浆；渐进破坏

中图分类号：TU 45 文献标识码：A 文章编号：1000–6915(2006)增1–2790–05

IMPROVEMENT AND FINITE ELEMENT ANALYSIS OF AN INTENSE

WEATHERING ROCK SLOPE

LIU Run 1，YAN Yue 1，YAN Shuwang 1，XU Yu 1，LUO Qiang 2，LONG Wanxue 2，ZHOU Yong 2

(1. School of Civil Engineering ，Tianjin University ，Tianjin 300072，China ；

2. Guizhou Communication Programming Planning and Prospecting Design Academy ，Investigating and Design Research Institute ，

Guiyang ，Guizhou 550001，China )

Abstract ：With the rapid development of economy in the western regions in China ，many high grade highway construction projects have been carried out. The construction work was often interrupted by the failure of the highly weathered rock slope. Therefore ，it is very important to find out effective methods to ensure the stability of these kinds of slopes. Applying grouting method to strengthen slope stability can greatly reduce excavation and prevent the natural environment from being seriously destroyed. Since the natural slope surface can be reserved with this method ，it is not necessary to construct conventional carved rock-slice on the slope and it is easy to take measurements to recover and develop the ecological environment. A typical slope reinforced with the grouting method has been accomplished successfully and is depicted in detail in this paper. The layout ，design and monitoring data for the project are given. Based on the practical experience ，an elastoplastic finite element program is applied to study the soil behavior before and after grouting. The mechanism of slope reinforcement is discussed based on the finite element analysis. The results show that ，after grouting ，the physico-mechanical properties of the soil are greatly improved. In this way ，the stability of such kinds of slopes can be improved. Key words ：rock mechanics ；rock slope ；stability ；compressive grouting ；progressive failure

1 引 言

随着我国经济建设不断发展和西部大开发战略

的实施，西部地区高等级公路建设项目日益增多。我国西部地区多为山岭重丘，地质条件极为复杂，建设中遇到大量的边坡稳定问题。工程中使用多种边坡加固的方法，取得了不同的加固效果。通常采