CAJ | 학술논문

以合肥地铁1号线某区间隧道为工程背景，利用有限差分软件 FLAC3D建立盾构掘进施工过程三维数值模型，分析不同掘进距离条件下地表沉降及围岩变形规律，确定了盾构掘进引起的地表沉降范围，并提出相应施工建议。结果表明：地表纵向沉降范围随着开挖面的推进而不断加大，其开挖面前方有效影响范围约为洞径的3倍；地表横向沉降变化规律和Peck沉降曲线的变化大体相同，采用Peck沉降曲线能较好的预测横向沉降范围；注意控制注浆量，从而减少围岩的变形。
이합비지철1호선모구간수도위공정배경，이용유한차분연건 FLAC3D건립순구굴진시공과정삼유수치모형，분석불동굴진거리조건하지표침강급위암변형규률，학정료순구굴진인기적지표침강범위，병제출상응시공건의。결과표명：지표종향침강범위수착개알면적추진이불단가대，기개알면전방유효영향범위약위동경적3배；지표횡향침강변화규률화Peck침강곡선적변화대체상동，채용Peck침강곡선능교호적예측횡향침강범위；주의공제주장량，종이감소위암적변형。
Taking a running tunnel of Hefei No .1 Subway Line as engineering background ,the 3D nu‐merical model of Shield tunneling construction process is established by means of the finite difference soft‐ware FLAC3D .The rules of ground surface settlement and surrounding rock deformation under different shield tunneling distance are analyzed ,the range of ground surface settlement induced by shield tunneling is determined and corresponding construction measures are proposed .T he result indicates that the range of ground surface longitudinal settlement is increasing with the advance of the excavation face ,and the effective influence range in front of excavation face is about three times of hole of diameter .T he chan‐ging rule of ground surface lateral settlement and Peck settlement curve is the approximate same ,so Peck settlement curve can be better predicted lateral settlement range ,and the amount of grouting is appropriately controlled thereby reducing the deformation of surrounding rock .