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
白梅(1992—),女,博士研究生。主要从事路基岩土工程问题方面的研究。E-mail: 230198270@seu.edu.cn
刘志彬(1976—),男,副教授,博导,博士。主要从事环境岩土工程、地质工程方面的研究。E-mail: seulzb@seu.edu.cn
收稿:2019-04-04,
修回:2019-09-24,
纸质出版:2021-06-16
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白梅,刘志彬,张书建等.GCL材料用于路基工程抗碾压性能试验研究[J].防灾减灾工程学报,2021,41(03):629-634.
BAI Mei,LIU Zhibin,ZHANG Shujian,et al.Experimental Study on Roll⁃resistance Performance of GCL for Subgrade Engineering[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):629-634.
白梅,刘志彬,张书建等.GCL材料用于路基工程抗碾压性能试验研究[J].防灾减灾工程学报,2021,41(03):629-634. DOI: 10.13409/j.cnki.jdpme.201904011.
BAI Mei,LIU Zhibin,ZHANG Shujian,et al.Experimental Study on Roll⁃resistance Performance of GCL for Subgrade Engineering[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):629-634. DOI: 10.13409/j.cnki.jdpme.201904011.
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 compaction 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 after rolling tests were obtained. The results show that GCL had piercing holes after compaction damage 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 coefficients increased after rolling tests, these values meet the mechanical and impermeability requirements of GCL for subgrade engineering.
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