Centrifugal Model Test of Active Reinforcement of Slope Anti-skid Piles Under Excavation Rainfall
In order to study the stability and deformation evolution of excavated slope under active re-inforcement of anti-slip piles,as well as the effectiveness of active reinforcement of anti-slip piles,centrifugal model tests of excavated slope under active reinforcement of anti-slip piles were carried out based on a highway slope.At the same time,in order to investigate the influence of rainwater infiltra-tion on pore pressure,slope deformation and supporting structure under special rainfall conditions,rainfall infiltration simulation was carried out by combining atomizing nozzle and pore pressure sensor.The results show that the active reinforcement of the slope effectively limits the horizontal displace-ment of the excavated slope,and maintains small deformation even when the centrifuge is loaded to 80g,resulting in a significant increase in slope stability.After rainfall,the response sensitivity of pore water pressure in different parts of slope is different.The response of pore water pressure in the middle of slope is the fastest,while the response of pore water pressure at the top and foot of slope lags behind.The vertical displacement of slope surface and the horizontal displacement of slope foot both increase in different degrees,and the strain of anti-slide pile increases,indicating that rainfall has an adverse effect on slope stability.However,the presence of anti-slip piles weakens the adverse effect.The test results confirm that the active reinforcement of anti-slip piles can effectively utilize the anti-sliding ability of the slope itself,avoid the decline of rock strength caused by excavation deforma-tion,and ensure the stability of the slope to a great extent.
excavated side sloperainfall infiltrationactive reinforcementstabilitycentrifugal mod-el test
NETL
NSTL
万方数据
