CAJ | 학술논문

通过FLAC3D软件模拟计算和分析陕南勉县的微型桩治理滑坡工程实例，研究了微型组合抗滑桩在滑坡治理中土拱效应的形成、应力的变化状况，得出最佳距径比。结果显示：微型桩在滑坡下滑主动土压力的作用下，首先在沿滑移方向第1排桩桩间形成应力拱效应，然后随着距径比的增加，依次在第2排、第3排桩上形成应力拱效应，并且前排桩的荷载分担比明显大于后排桩的荷载分担比。当距径比达到一定程度后土体绕过第1桩，形成以第2排桩为拱顶，第3排桩为拱脚的应力拱。由模拟的应力云图得知，距径比﹤3和﹥9时，没有明显的或者不存在应力土拱效应，距径比为5~8时最为理想。
통과FLAC3D연건모의계산화분석협남면현적미형장치리활파공정실례，연구료미형조합항활장재활파치리중토공효응적형성、응력적변화상황，득출최가거경비。결과현시：미형장재활파하활주동토압력적작용하，수선재연활이방향제1배장장간형성응력공효응，연후수착거경비적증가，의차재제2배、제3배장상형성응력공효응，병차전배장적하재분담비명현대우후배장적하재분담비。당거경비체도일정정도후토체요과제1장，형성이제2배장위공정，제3배장위공각적응력공。유모의적응력운도득지，거경비﹤3화﹥9시，몰유명현적혹자불존재응력토공효응，거경비위5~8시최위이상。
Through FLAC3 D simulation calculation and the analysis of micro pile treating landslide engineering ex-ample in Mianxian county of Shanxi,China. This paper studies the micro combination anti-slide pile is condition of the stress arch effect in the formation and in the change of horizontal stress,get the best distance and diameter ratio. Results show that the micro piles in landslide falling under positive soil pressure. Soil arching effect is formed along the slide direction in the first row of between piles. Then as the increase of ratio of distance and diameter,on the second row and the third row the soil arch effect is formed,the load sharing ratio in the front row were significantly greater than the back one. After the pitch diameter ratio reaches a certain degree,the soil around the first and sec-ond row piles,it is formed vault in the second row piles and the arch foot in the third row piles for the stress. By simulating the stress nephogram,distance and diameter ratio is less than 3 and is more than 9,the soil arch effect is not clear or there is no existent,it is ideal distance and diameter ratio is ratio of 5 to 8.