CAJ | 학술논문

通过微型桩与滑坡体相互作用的室内物理模型试验研究,为微型桩设计提供一定的依据.实验室内采用长3m,宽1.8 m,高2.2 m模型箱,模型箱中黄土分层填筑、夯实模拟滑床及滑体,圆弧状滑带采用双层塑料薄膜模拟,微型桩采用钢筋混凝土浇注,用压力盒与位移计观测压力与位移,滑体上部分级施加4 kPa荷载,加载24 kPa后,滑坡发生失稳.试验结果表明:微型桩加固滑坡后,滑坡的稳定系数由1.10提高到1.29;微型桩所受的滑坡推力呈三角形分布,桩前滑体抗力主要分布于埋深约1/3桩长的范围内,近似呈抛物线形分布;滑床抗力呈两个相对的三角形分布;试验中所用微型桩的破坏模式为滑面附近的弯曲与剪切相结合的破坏.
통과미형장여활파체상호작용적실내물리모형시험연구,위미형장설계제공일정적의거.실험실내채용장3m,관1.8 m,고2.2 m모형상,모형상중황토분층전축、항실모의활상급활체,원호상활대채용쌍층소료박막모의,미형장채용강근혼응토요주,용압력합여위이계관측압력여위이,활체상부분급시가4 kPa하재,가재24 kPa후,활파발생실은.시험결과표명:미형장가고활파후,활파적은정계수유1.10제고도1.29;미형장소수적활파추력정삼각형분포,장전활체항력주요분포우매심약1/3장장적범위내,근사정포물선형분포;활상항력정량개상대적삼각형분포;시험중소용미형장적파배모식위활면부근적만곡여전절상결합적파배.
To provide basis for micropile design, model tests about single micropile and landslide are carried out in a model box.The model box is 3 meters in length, 1.8 meters in width and 2.2 meters in height.The sliding bed and landslide are simulated by tamping the loess.The sliding face is arc and simulated by double layer of plastic film.The micropile is made by reinforced concrete.The press and displacement is tested by pressure cells and displacement transducers.The landslide slides when putting 24 kPa pressure on the top.The test results show that micropile can enhance the stability factor of landslide from 1.10 to 1.29.The landslide-thrust distributes as triangle.The resistance of sliding mass distrib-utes in one third length of the micropile near the ground and as parabola.The resistance of sliding bed distributes as triangle.The damage form of micropiles can be defined as cutting and bending failure near the sliding face.