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采用土工离心机及专用振动台,进行了静动力加载条件下抗滑桩加固黏性土坡的离心模型试验。测量了试验过程中边坡的位移场和加速度响应的变化过程以及抗滑桩的位移和应变分布。试验结果表明地震过程中土坡的加速度响应自下而上逐渐增大,震后残余变形的水平分量最值相比震前向坡上部移动。静动力加载过程中,抗滑桩内侧土体存在一个面,其内外两侧的土体位移表现出不同的水平位移变化规律,从而可以将抗滑桩加固土坡划分成4个分别具有不同变形特性的区域;同一高程处桩的水平位移大于内侧土体而小于外侧土体;抗滑桩与土发生较复杂的相互作用,并使得土坡的变形趋于均匀。
Centrifugal centrifuge and special vibration table were used to test the centrifugal model test of anti-slide piles to reinforce cohesive soil slope under static and dynamic loading conditions. The changing process of the displacement field and acceleration response of the slope and the displacement and strain distribution of the anti-slide pile were measured during the test. The experimental results show that the acceleration response of the soil slope gradually increases from bottom to top during the earthquake, and the horizontal component of the post-earthquake residual deformation moves more than the upper part of the earthquake before the earthquake. During the static and dynamic loading process, there is a surface inside the anti-slide pile, and the displacement of the soil on the inner and outer sides shows different rules of horizontal displacement, so the anti-slide pile can be divided into four different deformations The horizontal displacement of the pile at the same elevation is larger than that of the inner soil and less than that of the outer soil. The anti-slide pile interacts with the soil in a more complicated way and the deformation of the soil slope tends to be even.