长江科学院院报2024，Vol.41Issue(3)：178-185,8.DOI:10.11988/ckyyb.20221312
单排微型桩加固缓倾长大裂隙土边坡的力学机制
Mechanical Mechanism of Single Row of Micro Piles Strengthening Gently Inclined Long Fissured Soil Slope
摘要
Abstract
The widely application of precast concrete micro piles in the emergency reinforcement of expansive soil slope with long cracks in the South-to-North Water Diversion Project highlights their significance in ensuring slope safety.Studying the reinforcement mechanism is essential.Based on similar model test,a model was established to examine the interaction between the sliding mass and the micro single row pile in the slope with fracture surface.A thrust force was applied parallel to the fracture surface,and both similar model test and numerical simulation were conducted.The results demonstrated the effectiveness of preventing sliding by micro single row pile reinforcement.It maintained a high level of anti-sliding force in the slope system,increased slope toughness against failure,and sig-nificantly improved slope stability.The slope's resistance to sliding decreased as the pile spacing increased.The in-fluence of a single micro pile only extended over a limited range.As the pile spacing increased,the soil arching effect gradually weakened.Ignoring the interaction between piles became feasible when the pile spacing exceeded 12 times the pile diameter.It is recommended to maintain a pile spacing 8 times of the pile diameter.Moreover,the strengthening effect of micro piles arranged in the middle of the slope surpassed that of those arranged in the upper 1/3 of the slope.关键词
微型桩/缓倾长大裂隙/膨胀土边坡/相似模型试验/数值模拟Key words
micro pile/gently inclined long fissure/expansive soil slope/similarity model test/numerical simulation分类
建筑与水利引用本文复制引用
马鹏杰,魏凯,康静伟,芮瑞,蔡正乾,夏荣基..单排微型桩加固缓倾长大裂隙土边坡的力学机制[J].长江科学院院报,2024,41(3):178-185,8.基金项目
国家自然科学基金面上项目(42272315) （42272315）
