It is of great significance to study the shear behavior of the structure-soil interface for foundation engineering design and construction.With the improved direct shear apparatus,considering the interface type and the soil water content,the di-rect shear tests of interface between steel and low liquid limit clay were performed,and the rate of shear,stress strain relation-ship and the volume change were analyzed.The results show that the shear stress presents three stages;namely,fast increase,slow increase and maintain stability,with the shear displacement.The relationship between the shear stress and the shear dis-placement can be expressed by the Gompertz model.When the soil mass is at the optimum water content,the interface shear strength and the index are the largest.The shear strength and the index of the rough interface are larger than those of the smooth interface.The shear shrinkage of the soil under the rough interface is more obvious than that under the smooth inter-face.The shear shrinkage characteristics of the soil become more significant with the water content.
关键词
钢/低液限黏土/含水率/粗糙度/剪切律/强度律/体变律
Key words
Steel/Low Liquid Limit Clay/Water Content/Roughness/Rate of Shear/Stress Strain Relationship/Volume Change
维普
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