GCL材料用于路基工程抗碾压性能试验研究  

Experimental Study on Roll⁃resistance Performance of GCL for Subgrade Engineering

作　　者：白梅 刘志彬[1] 张书建[2] 谢世平 刘锋 张锦鹏 BAI Mei;LIU Zhibin;ZHANG Shujian;XIE Shiping;LIU Feng;ZHANG Jinpeng(Institute of Geotechnical Engineering,Southeast University,Nanjing 211189,China;High grade highway construction Department of Jilin Province,Changchun 130062,China;Tianjin Zhonglian Gelin Science and Technology Development Co.,Ltd.,Tianjin 301617,China)

机构地区：[1]东南大学交通学院岩土工程研究所,江苏南京211189 [2]吉林省高等级公路建设局,吉林长春130062 [3]天津中联格林科技发展有限公司,天津301617

出　　处：《防灾减灾工程学报》2021年第3期629-634,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：吉林省交通运输科技项目(2016-1-16-2);国家自然科学基金资助项目(41877240,41672280)资助。

摘　　要：为研究GCL材料应用于路基工程时的抗碾压性能,选用颗粒型双层无纺布GCL和颗粒型GCL进行室内击实损伤试验和现场碾压试验。首先统计击实试验后两种GCL破坏情况,然后将GCL材料放入土柱模型槽内测试模拟降雨后材料的隔水性能,最后测试现场碾压试验后两种GCL的拉伸强度和渗透系数。试验结果表明,击实损伤试验造成的GCL破坏主要表现为刺穿型孔洞和表面无纺布的破坏,击实损伤试验后两种GCL隔水性能均有下降。现场碾压试验后,两种GCL拉伸强度均有小幅下降,渗透系数增大,但它们的值仍符合钠基膨润土防水毯的力学与抗渗要求。因此,GCL具有较好的抗碾压性能。To study the roll-resistance performance of GCL for subgrade engineering,the granular GCL with double-layer non-woven and the granular GCL cloths were studied through compaction damage tests in laboratory and rolling tests in the field.The damage conditions of GCL after compac‑tion damage tests were evaluated at first,and then the waterproof performance of damaged GCL were investigated using rainfall simulation tests.The tensile strength and permeability coefficient of GCL af‑ter rolling tests were obtained.The results show that GCL had piercing holes after compaction dam‑age tests and the non-woven cloth of GCL damaged.The waterproof capacity of the granular GCL and the granular GCL with double-layer non-woven cloth had a reduction after compaction damage tests.Although the tensile strength of the two kinds of GCL decreased slightly and the permeability coeffi‑cients increased after rolling tests,these values meet the mechanical and impermeability requirements of GCL for subgrade engineering.

关 键 词：GCL 现场碾压 隔水性能 拉伸强度 渗透系数 

分 类 号：TU443[建筑科学—岩土工程]