土工布加筋黃土力學(xué)性能研究
劉少博，顧強康，梁建偉，屈波，張昊
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（空軍工程大學(xué)航空航天工程學(xué)院， 西安 710038）
［摘要］采用較高水平的圍壓，對土工布加筋黃土進行三軸剪切試驗，探究了不同圍壓和加筋方式下土工布加筋黃土的強度及變形特性。結(jié)果表明：在較高圍壓條件下，土工布加筋土體的應(yīng)力-應(yīng)變曲線由應(yīng)變軟化型轉(zhuǎn)變?yōu)閼?yīng)變硬化型，土體強度有所提高，導(dǎo)致強度提高的主要原因是其黏聚力的增大；隨圍壓的增大、加筋層數(shù)的增多，土體強度不斷增大；較低圍壓條件下加筋效果不明顯，圍壓越大,筋材對土體的加固效果越難得到充分發(fā)揮。因此，在適當?shù)膰鷫悍秶鷥?nèi)可以使用加筋方法來加固土體。［關(guān)鍵詞］加筋黃土; 土工布; 三軸剪切試驗; 應(yīng)力-應(yīng)變特征中圖分類號：TU431 文獻標識碼：A 文章編號：1002-848X(2015)14-0099-04
Research on the mechanics property of fabric reinforced loessLiu Shaobo, Gu Qiangkang, Liang Jianwei, Qu Bo, Zhang Hao(Institute of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi'an 710038, China)Abstract: Triaxial shear test under high confining pressure on fabric reinforced loess samples was carried out to investigate the strength and deformation characteristic of fabric reinforced loess through varying confining pressure and forms of reinforcement. The results demonstrate that stress-strain curve of fabric reinforced loess turns into strain-softening characteristics from strainhardening under the condition of high confining pressure, and the strength of fabric reinforced loess is improved mostly for the reason that cohesion of the soil increases. The strength of the soil increases with the increase of confining pressure and reinforced layers. The effect of setting fabric is not apparent under the condition of low confining pressure, and the strengthening effect of fabric to loess dose not play a role sufficiently with the increase of confining pressure. So setting fabric method in the soil can be used to strengthen the soil within the scope of the appropriate confining pressure.Keywords: reinforced loess; fabric; triaxial shear test; stress-strain characteristic
作者簡介：劉少博，碩士研究生，Email:tju_boshaoliu@163.com。
