【作者】 单炜； 刘红军； 杨林； 郭颖； 孙玉英；

【Author】 SHAN Wei LIU Hong-jun YANG Lin GUO Ying SUN Yu-ying (College of Civil Engineering,Northeast Forestry University,Harbin,Heilongjiang 150040,China)

【机构】 东北林业大学土木工程学院；

【摘要】 土工合成材料加筋土体效果受土的类型、土的级配、土体含水量等许多因素影响,为重点研究土体含水量变化对加筋界面特性的影响,采用了直剪摩擦试验,选用了两种类型的土体,每种类型的土体分别设计了5种不同的含水量,每一含水量土体剪切面上施加四级不同的法向应力,进行直接剪切.试验结果表明:两种类型的土体加筋界面的抗剪强度指标及抗剪强度在最佳含水量附近时达到最大值,当含水量较小时,加筋界面的抗剪强度指标及抗剪强度随含水量的增加而增大;超过最佳含水量时,随含水量的增加而减小,粉质粘土要比风化山砂表现的更加明显.因此,在工程施工和使用期间,应采取合适的防治措施控制好土体的含水量,特别是土体的含水量不宜过大,以达到最佳的加筋效果.更多还原

【Abstract】 The effect of geosynthetics was influenced by soil type,soil gradation,soil water content,and many other factors.In order to focus on the effect of soil water content,direct shear friction test was used and two types of soil was selected,five different water content were designed for each type of soil,four different band normal stress were applied for each type of water content.Test results confirmed:It was near the optimum water content that shear strength of reinforced interface for two type of soil reached maximum.When the water content is smaller,shear strength of reinforced interface was increased with water content,when the water cont- ent is bigger than optimum water content,it was decreased with water content,silty clay is more obviously than effloreseent sand.Therefore,in order to achieve the best results of reinforced,appropriate prevention measures should be taken to control soil water content,especially the bigger soil water content during the period of the construction and using.更多还原