摘要
为了完善和优化含土工膜(GM)和土工膨润土防水毯(GCL)组成的复合衬里边坡工程的稳定性分析方法,在对已有剪切试验结果进行综合分析的基础上提出了一种GM+GCL复合衬里剪切强度的简便确定方法。通过归纳GM+GCL复合衬里在涵盖低到高法向压力条件下的剪切破坏模式、峰值剪切强度特征和残余剪切强度特征,提出了将复合衬里作为一个复合界面整体看待时的剪切强度选取原则。考虑GM+GCL复合衬里的破坏面转移特征和峰值后软化特征,给出了具体的复合衬里峰值强度和残余强度简便确定方法。研究结果发展了含土工合成材料边坡的剪切强度计算办法,能够在实现快速分析工程安全的同时减小或避免开展GM+GCL复合衬里剪切试验所需的大量时间和精力。
To improve and optimize the stability analysis method of engineering slope with liner composed of geomembrane(GM)and geosynthetic clay liner(GCL),a simple method for determining the shear strength of GM+GCL composite liner is proposed based on the comprehensive analysis of the existing shear test results.By summarizing and analyzing the shear failure mode,peak and residual shear characteristics of GM+GCL composite liner under the normal stress covering low to high pressure,a selection principle for shear strength of the composite liner is proposed,which considers the double interfaces as a whole.Considering the characteristics of failure surface transfer and post peak softening of the composite liner,a specific simple method determining the peak strength and residual strength of the composite liner is presented.This study develops the calculation methodology for the shear strength of the slope containing geosynthetics.It can achieve rapid engineering safety analysis while reducing or saving a large amount of time and energy used in the shear tests of GM+GCL composite liner.
作者
章玲玲
林海
ZHANG Lingling;LIN Hai(School of Architectural Engineering,Jiangxi V&T College of Communications,Nanchang 330013,China;School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China)
出处
《人民长江》
北大核心
2023年第12期174-178,201,共6页
Yangtze River
基金
国家自然科学基金项目(42062018)
国家自然科学基金青年基金项目(41702324)。
