CAJ | 학술논문

文章运用FLAC3D有限差分软件对合肥轨道交通2号线潜山路车站基坑工程开挖全过程进行数值模拟，计算中土体采用摩尔‐库伦弹塑性模型，围护结构采用实体单元，围护结构与土体的接触面采用接触面单元。通过分析计算结果与监测数据可得：围护结构的最大水平位移发生在基坑的中部，随着基坑不断开挖，围护结构最大水平位移逐渐下移，其最大变形位置位于开挖面附近，呈现两端小、中间大的“抛物线”分布；基坑外地表沉降是一种典型的凹槽形沉降，最大沉降值发生在距基坑边缘10 m处；数值模拟结果与监测数据基本一致，且变形规律及趋势相吻合，可为类似工程的设计与施工提供参考。
문장운용FLAC3D유한차분연건대합비궤도교통2호선잠산로차참기갱공정개알전과정진행수치모의，계산중토체채용마이‐고륜탄소성모형，위호결구채용실체단원，위호결구여토체적접촉면채용접촉면단원。통과분석계산결과여감측수거가득：위호결구적최대수평위이발생재기갱적중부，수착기갱불단개알，위호결구최대수평위이축점하이，기최대변형위치위우개알면부근，정현량단소、중간대적“포물선”분포；기갱외지표침강시일충전형적요조형침강，최대침강치발생재거기갱변연10 m처；수치모의결과여감측수거기본일치，차변형규률급추세상문합，가위유사공정적설계여시공제공삼고。
T he w hole process of the excavation of foundation pit engineering construction of Qianshan Road Station of Hefei No .2 rail transit line is simulated numerically by using the FLAC 3D finite difference software .In the calculation ,Mohr‐Coulomb elastoplastic model is used to calculate the soil ,the entity unit to calculate the retaining structure ,the contact elements to calculate the contact surface between retaining structure and soil .The calculation results are compared with the monitoring data .The results show that the maximum horizontal displacement of retaining structure occurs in the middle of the foundation pit ;with the excavation of foundation pit ,the maximum horizontal displace‐ment of retaining structure moves dow n gradually ;the maximum deformation position is near the ex‐cavation surface ,and the deformation show s a “parabola” distribution w hich is big in the middle and small at both ends ;the ground settlement outside is a kind of typical groove shape of settlement ,the position of the maximum settlement value is 10 m away from the foundation pit edge .The numerical simulation results and monitoring data are almost the same ,and the deformation law and trend are consistent .T he study can provide a reference for the design and construction of similar projects.