关键词: 抗滑桩, 物理模型试验, 相似理论, 土压力, 桩身变形

Abstract: This paper presents the study of interaction between the bottom built-in piles and landslide mass through the landslide physical model test. Based on the monitoring data from micro soil pressure cells and resistance strain gauges, mechanical characteristics of model pile, bending moment distribution rule of pile body and model deformation failure mode are studied. The test results show that the trust behind the pile is a parabolic distribution and the resultant force point is in half of free part above the sliding surface. Since the built-in piles take the most part of pushing force, the soil resistance in front of it is more stable and smaller. Meanwhile, the bending moment distribution form of pile body is different from any ordinary anti-sliding pile. The range from 0 to 15 cm depth is the main bearing area of bending moment and the maximum moment lays in one third of free part above the sliding surface. The bending moment near the sliding surface is relatively small. At last, the sliding mass flows above the model piles under the pushing force when the test comes to the end. The results of indoor model test show some regulations of the anti-sliding characteristics and provide scientific guidance for the design of rock-socketed piles.

Key words: anti-sliding pile, physical model test, similarity theory, soil pressure, deflection of pile