CAJ | 학술논문

基于相似理论设计了SMW工法支护的软土深基坑支护开挖试验模型，由模型试验测得了各级开挖稳定后的SMW工法墙墙顶位移；在模型试验基础上，采用大型非线性有限元软件ABAQUS建立了特征墙段的三维有限元数值分析模型，由数值分析也获得了各级开挖工况下墙顶位移．比较了基坑模型试验及其数值模拟分析结果，并采用指数模型拟合了SMW工法墙墙顶位移与嵌固比关系曲线．结果表明：采用指数模型拟合SMW工法墙墙顶位移与嵌固比关系可取得良好的拟合效果．工程施工中，可采用指数模型预测预报SMW工法墙随基坑开挖产生的墙顶水平位移．施工过程中，加强墙顶位移监测，绘制墙顶位移与嵌固比关系曲线，将预测位移值与实测值进行分析对比，可以了解支护结构实际所处的工作状态及变形阶段，从而可以预防工程事故发生．
기우상사이론설계료SMW공법지호적연토심기갱지호개알시험모형，유모형시험측득료각급개알은정후적SMW공법장장정위이；재모형시험기출상，채용대형비선성유한원연건ABAQUS건립료특정장단적삼유유한원수치분석모형，유수치분석야획득료각급개알공황하장정위이．비교료기갱모형시험급기수치모의분석결과，병채용지수모형의합료SMW공법장장정위이여감고비관계곡선．결과표명：채용지수모형의합SMW공법장장정위이여감고비관계가취득량호적의합효과．공정시공중，가채용지수모형예측예보SMW공법장수기갱개알산생적장정수평위이．시공과정중，가강장정위이감측，회제장정위이여감고비관계곡선，장예측위이치여실측치진행분석대비，가이료해지호결구실제소처적공작상태급변형계단，종이가이예방공정사고발생．
Based on the theory of Similarity, the model of trial pit supported by SMW and the displacement-values on the top of wall after excavation were measured. Based on the model test, three-dimensional finite element analysis model of characteristic-wall was made by the large-scale non-linear finite element software ABAQUS and the displacements on the top of SMW at each excavation-step was obtained. The results of the pit model test and nu- merical simulation analysis were compared and the relation curve of the displacement with embedded-ratio was fitted by means of the model of exponential function. It was shown thatgood fitting effect could be obtained when the relation curve of the displacement with embed- ded-ratio was fitted by means of the model of exponential function. In engineering construc- tion, the displacement-values on the top of wall as the excavation could be forecasted by the model of exponential function. To prevent the engineering accidents happen, the displace- ment-values on the top of wall should be monitored and the relation curve of the displace- ment with embedded-ratio should be drawn. By analysing and comparing the measured-val- ues with its forecast-values, one can find out the actual working state of the supporting sys- tem and assess its stage of deformation and thereby prevent the happening of accident.