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土工织物是土石坝堤和土坡的常用加固手段,其在水位骤降环境下对土坡的加固机理尚未阐明。该文进行了水位骤降离心模型试验,观测了土工织物加固土坡与素土坡的变形破坏过程。试验结果表明:土工织物显著减小了土坡的位移并提高了土坡稳定性;土工织物存在着与水位变化无关的分界点,其内侧和外侧分别表现为约束土坡变形和被土坡约束的不同性质;土工织物通过其与土坡的相互作用,将土坡内部的约束传递到坡外部,使土坡的变形分布更均匀,阻碍了“变形局部化发展到一定程度”这一滑裂面形成的前提条件的发生。
Geotextiles are commonly used reinforcement measures for earth-rock embankments and soil slopes. The reinforcement mechanism of soil slopes under the environment of sudden drop in water level has not been elucidated yet. In this paper, a centrifugal model test of sudden drop in water level was carried out to observe the deformation and failure process of geotextile-reinforced soil slopes and plain soil slopes. The results show that geotextiles significantly reduce the displacement of soil slopes and improve the stability of soil slopes. There is a demarcation point which has nothing to do with the change of water level in geotextiles. The deformation of soil geogrids is constrained by soil slopes and constrained by soil slopes The interaction between geotextile and soil slope will transfer the internal constraints of soil slope to the outside of the slope and make the deformation distribution of soil slope more uniform and hinder the development of deformation localization to a certain degree The precondition of slip surface formation.