Internal shear strength of three geosynthetic clay liners
Internal shear strength of three geosynthetic clay liners
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DOI：
10.1061/(asce)1090-0241(1998)124:10(933
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发表时间：
1998-10
影响因子：
3.9
通讯作者：
P. Fox;M. Rowland;John R. Scheithe
中科院分区：
文献类型：
--
作者：
P. Fox;M. Rowland;John R. Scheithe
研究了胶粘剂、胶粘剂和针刺土工合成粘土衬垫（GCL）的内部剪切强度。使用能够测量峰值和残余（或接近残余）剪切强度的大型直接剪切机进行测试。对于每种产品，故障发生在编织土工织物/膨润土界面和超孔隙压力保持为零的破坏面在剪切。由于增强纤维之间的摩擦连接，针刺GCL的峰值剪切强度随着法向应力的增加而显著增加。胶粘剂粘结和胶粘剂粘结的GCL的峰值剪切强度表现出较小的相应增加。剩余剪切强度失效包络线基本上与产品类型无关。一个两阶段的试样水化过程中描述，减少了所需的在机器上的水化时间，达到平衡条件。对于增强的产品，峰值和残余剪切强度的小的下降…
A study of the internal shear strength of adhesive-bonded, stitch-bonded, and needle-punched geosynthetic clay liners (GCLs) is presented. Tests were performed using a large direct shear machine capable of measuring peak and residual (or near residual) shear strengths. For each product, failure occurred at the woven geotextile/bentonite interface and excess pore pressures remained zero on the failure plane during shear. The peak shear strength of the needle-punched GCL increased significantly with increasing normal stress because of the frictional connection of the reinforcing fibers. The peak shear strengths of the adhesive-bonded and stitch-bonded GCLs showed smaller corresponding increases. The residual shear-strength failure envelope was essentially independent of product type. A two-stage procedure for specimen hydration is described, which reduced the required in-machine hydration time to reach equilibrium conditions. For the reinforced products, small decreases in peak and residual shear strengths ...