中文摘要：

为研究加筋粗粒土填料的强度变形特性及加筋效果，进行加筋强风化软岩粗粒土固结不排水和固结排水大三轴试验。试验表明：加筋填料的应力-应变关系表现为应变硬化型；轴向应变较小（εa〈1％）时，加筋填料效果不明显，随着轴向应变的逐渐增大加筋效果逐渐发挥。加筋填料的孔隙水压力均高于素填料，随着加筋层数的增加均有不同程度的提高。加筋效果系数均〉1．0，一层加筋填料加筋效果系数为1．09～1．21，二层加筋填料加筋效果系数为1．30～1．71，三层加筋填料加筋效果系数为1.31～1．72。加筋前后填料的内摩擦角磋本不变，填料的黏聚力增大。加筋填料的本构关系可以用Duncan-Chang模型来描述，依据试验结果求得模型参数。

英文摘要：

In order to study the strength and deformation properties of soft rock composed of coarse-grained soil, as well as its reinforcement effect as fillings, large-scale consolidated drained and undrained triaxial tests are carried out for reinforced intense-weathered rock. The results show that the stress-strain relationship of geotextile-reinforced fillings is of strain hardening. The geotextile-reinforced fillings have little effect while the triaxial strain is less than 1%, and the reinforcing effect becomes more remarkable with the increase of triaxial strain. The pore water pressures of geotextile-reinforced soil samples are higher than those ：of pure coarse-grained soil samples; and they increase with the increase of geotextile layers. The coefficients of reinforcing effect are all more than 1.0, being 1.09 - 1.21 while with one layer of geotextile; 1.30 - 1.71 with two layers of geotextile and 1.31 - 1.72 with three layers of geotextile. The internal friction angle φ of fillings before and after reinforcements is nearly constant, while the cohesion force of the fillings increases with the increase of geotextile layers. The constitutive relation can be described with the Duncan-Chang model; and the parameters of Duncan-Chang model for geotextile-reinforced soil are obtained through tests.