CAJ | 학술논문

基于有限元强度折减法，当桩长一定时计算在不同混凝土强度等级的弹性模量条件下的基坑整体稳定性系数，并发现在以桩长为18.0m和19.0m为界以及以弹性模量为3.00×107kPa和3.15×107kPa为界，稳定性系数有不同的增长趋势；然后借助正交试验分别求取桩长和弹性模量的优水平及两者的最优组合，并确定了桩长是影响稳定性的主要因素，弹性模量是次要因素；最后提出了稳定性系数增率，并利用稳定性系数增率判断最优桩长，且在此基础上确定混凝土的弹性模量，从而选出最优的桩长和弹性模量组合，该组合胜于正交试验得到的最优组合，为单桩节省了近10%的费用，达到了对悬臂支护桩优化的目的。
기우유한원강도절감법，당장장일정시계산재불동혼응토강도등급적탄성모량조건하적기갱정체은정성계수，병발현재이장장위18.0m화19.0m위계이급이탄성모량위3.00×107kPa화3.15×107kPa위계，은정성계수유불동적증장추세；연후차조정교시험분별구취장장화탄성모량적우수평급량자적최우조합，병학정료장장시영향은정성적주요인소，탄성모량시차요인소；최후제출료은정성계수증솔，병이용은정성계수증솔판단최우장장，차재차기출상학정혼응토적탄성모량，종이선출최우적장장화탄성모량조합，해조합성우정교시험득도적최우조합，위단장절성료근10%적비용，체도료대현비지호장우화적목적。
Based on the finite element strength reduction method, when the pile length is constant, the foundation pit overal stability coef icient is calculated in dif erent elastic modulus of concrete strength grade conditions. It is found that the stability coef icient has dif erent growth trends, when the pile length is 18.0m and 19.0m is bounded and the elastic modulus is 3.00×107kPa and 3.15×107kPa is bounded. With orthogonal test, the optimization levels and the optimal combination of the pile length and elastic modulus is respectively acquired, and the pile length is the main factors that af ect the stability and the elastic modulus is secondary factor are identified. The increasing rate of the stability coef icient is proposed, and the optimal pile length is decided with it. Based it, the optimal concrete elastic modulus is identified too. So the optimal pile length and the optimal concrete elastic modulus are chosen. And the combination is bet er than optimal combination is determined by orthogonal test, about 10%cost is saved for a pile, it is objective for the optimization of cantilever supporting pile.