中文摘要：

以盾构隧道装配式衬砌结构为研究对象,引入各向刚度不等的连续材料模型,按变形等效原则对不连续的隧道结构横向和纵向的刚度分别进行了等效折减,采用室内相似模型试验和三维有限元数值分析相结合的手段,以广州地铁三号线大沥区间盾构隧道工程为背景,对新建隧道施工所引起的已建平行隧道纵向变位、纵向附加轴力和弯矩、横向变形、横向附加轴力和弯矩进行深入研究,探讨和揭示围岩条件,隧道净距,顶推力等因素对已建平行隧道的变形和附加内力分布变化规律的影响.研究结果表明,新建盾构隧道施工所引起的已建隧道的影响主要集中于邻近新建隧道侧的拱腰附近,在软弱地层保持一定的隧道净距是必要的,盾构顶推力需控制在一定范围内,具体视围岩、净距以及可能造成的位移、相对变形和附加内力情况而定.

英文摘要：

Taking the assembly lining structure of shield tunnel as object of study, the continuum material model with the tunnel circumferential and longitudinal stiffness being discounted is introduced based on equivalent deformation principle. With the Dali interzone of the project Guangzhou metro line 3 as research background, laboratory model test and 3D finite element analysis are both applied to the research on the influence of shield tunnel construction on the constructed parallel one. The longitudinal secondary, longitudinal additional axial force and bending moment, circumferential deformation, circumferential secondary axial force and bending moment of the constructed tunnel brought by the newly parallel one are investigated. Factors such as surrounding soil, clear distance, jacking force, etc., are also discussed in the distribution and variation of displacement and secondary inner forces of the constructed tunnel during shield tunnel construction. The results indicate that the influence of the newly constructed tunnel mainly occurs on the hance of the constructed tunnel close to the new one, that it is necessary to keep a certain clear distance between two tunnels in the weak stratum and that the jacking force of the shield should be controlled in a certain range, according to surrounding soil, clear distance, possible displacement, relative deformation and secondary inner forces.