强风化岩质边坡滑坡治理及有限元分析

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。

IMPROVEMENT AND FINITE ELEMENT ANALYSIS OF AN INTENSE WEATHERING ROCK SLOPE

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.