论文部分内容阅读
通过三轴试验方法研究土工格栅加筋土的强度及变形破坏特性,探论了在不同加筋情况下,土工格栅加筋土强度影响因素及其变化规律,分析了素土和土工格栅加筋土的变形破坏形式及筋材在土体抗剪破坏过程中的变形机理。试验结果表明:(1)加筋后土体的强度和抵抗变形的能力明显增强。(2)在加筋层数一定的情况下,随着围压的增加加筋土强度明显增强,加筋效果显著增加。(3)在围压一定的情况下,随着加筋层数的增加加筋土强度增强,加筋效果显著增加。(4)对于强度加筋效果系数和规格化强度分析发现,在中围压下,加筋土加筋效果最合理最有效。(5)土工格栅加筋土应力应变关系采用固结围压作为归一化因子进行处理可得到一个统一的数学表达,即归一化公式,具有很好的归一化特性。本研究结果对于深入研究土工格栅加筋土加固机理和加筋土工程具有指导意义。
The strength and deformation and failure characteristics of geogrid reinforced soil were studied by triaxial test. The influencing factors and variation regularity of geogrid reinforced soil under different reinforcement conditions were discussed. DEFORMATION AND FAILURE FORM OF GROUND REINFORCED SOIL AND DEFORMATION MECHANISM OF REINFORCED MATERIALS DURING SHEAR REINFORCEMENT PROCESS OF SOIL. The test results show that: (1) The strength of soil and resistance to deformation after reinforcement are obviously enhanced. (2) In the case of a certain number of stiffened layers, the strength of the reinforced soil increases obviously with the increase of the confining pressure, and the reinforcing effect is obviously increased. (3) Under the condition of confining pressure, the strength of reinforced soil increases with the increase of the number of reinforcement layers, and the reinforcement effect increases significantly. (4) For the strength reinforcement effect coefficient and normalized strength analysis, it is found that the reinforcing effect of reinforced earth is the most reasonable and effective under the confining pressure. (5) The relationship between stress and strain of geogrid-reinforced soil Adopting consolidation confining pressure as a normalization factor can obtain a uniform mathematical expression, that is, a normalized formula, and has good normalization characteristics. The results of this study are of guiding significance for the further study on the reinforcement mechanism of geogrid reinforced soil and reinforced earthwork.