盾构掘进施工对上部建筑结构沉降影响分析  

Influence of Shield Tunneling Construction on Settlement of Superstructure

作　　者：董立波 Dong Libo(Sinohydro Bureau 1 Co.Ltd.,Changchun,Jilin 130033)

机构地区：[1]中国水利水电第一工程局有限公司,吉林长春130033

出　　处：《江西建材》2021年第1期108-110,共3页Jiangxi Building Materials

摘　　要：为研究盾构掘进对邻近既有建筑物变形的影响范围,采用Midas/GTS有限元软件,充分考虑土层-结构相互作用,通过激活和钝化功能实现"生死单元"这一形式模拟隧道工程施工的全过程(地层-结构法),从而实现动态模拟盾构掘进过程。研究结果表明:盾构隧道掘进施工引起的地层水平位移、竖向位移的最大值将逐步向前推进;盾构隧道掘进施工引起的邻近建筑结构桩基位移表现为朝向开挖面内的位移,最大水平位移位于最左排桩基,最大竖向位移位于建筑结构桩基底部;建筑物远离盾构隧道开挖一侧位移远小于邻近开挖一侧。In order to investigate the influence of shield tunneling on the deformation of adjacent existing buildings, Midas/GTS finite element software was used to simulate the whole process of tunnel construction by fully considering the soil-structure interaction, and realizing the "life and death unit" through activation and passivation functions(stratum-structure method), so as to realize the dynamic simulation of shield tunneling process. The results show that: the maximum horizontal and vertical displacements of the ground caused by shield tunneling construction will gradually increase with the construction;the pile foundation displacement of adjacent building structures caused by shield tunneling construction developed towards the excavation surface, where the leftmost row of piles has the largest horizontal displacement, and the bottom of the pile has the largest vertical displacement;the displacement on the side of the building away from the shield tunnel excavation is much smaller than the side adjacent to the excavation.

关 键 词：盾构掘进 临近建筑结构 有限元分析 位移规律 

分 类 号：TU753[建筑科学—建筑技术科学]