墩以其承载力大，施工工艺简单，在建筑工程中被广泛使用，然而在实际的设计中却无对应的设计规范依据。目前，在城市隧道建设中由于隧道开挖引起墩承载力变化以及位移变形问题已经引起了人们广泛关注，本文正是针对这些问题进行了研究。论文从墩设计角度出发，使用数值分析软件ANSYS，模拟分析了隧道与墩在不同相对位置、不同墩直径、墩长度工况条件下，隧道开挖对墩承载力、纵横向刚度、墩沉降的影响，分析其变化规律。论文在理论分析基础上，结合工程实例，针对这一课题开展研究，得出如下理论成果： （1）对墩的设计方法进行了阐述，通过对各种不同的设计方法对比，考虑各种不同的影响因素为墩的设计提供了简便的方法。 （2）通过分析隧道开挖中隧道与墩不同位置、不同墩长、墩径对墩的沉降和承载力的影响。墩顶沉降随它们的值增加而减小，但是到一定限度以后，他们的继续增加对墩的沉降影响不大。 （3）利用数值模拟手段，针对隧道与墩之间不同位置、以及不同墩径，进行数值分析研究。在工程结构设计、基础设计中，充分考虑到隧道对于墩影响的特点，提出了一些可行的技术措施，通过对于工程实例分析，确定合理的施工方案，并制定相关的技术措施。 本文所涉及的设计方案、计算方法对于同类墩工程设计以及隧道工程开挖监护工作具有较高的实用参考价值。

The pillar foundation, as big supporting capacity and simple construction craft, has widely used in the architectural engineering, however in actual design whether there is concrete design standard use. At present, the people widely pay attention to the pillar foundation supporting capacity change as well as the displacement distortion question in the city tunnel construction because tunnel excavation caused. The article precisely aim at these questions. The paper embarks from the pillar foundation design angle, used numerical analysis software ANSYS, analyzed the tunnel and the pillar foundation in the different relative position, the different pillar diameter, under the pillar length operating mode condition, tunnel excavation to the pillar foundation supporting capacity, vertically and horizontally to the rigidity, the pillar base subsidence influence, and analyzes its changes rule. The paper, in the theoretical analysis foundation, used the union project example, in view of this topic development research, obtains the following theory achievement: （1）The pillar foundation design method has carried on the elaboration ,through has provided the simple computation design method to each kind of different design method contrast for the pillar foundation design. （2）Through analyzed its pillar to the pillar statics to be long, pillar diameter to the subsidence the influence. The pillar has gone against the subsidence to increase along with theirs value reduces, but to certain limit, their continuation increases to the pillar subsidence influence is not big. （3）Using the finite element method, in view of the pillar base and between the subway tunnel the different position, as well as the pillar diameter was different, has conducted the numerical analysis research; In the engineering structure design, the foundation design, fully considered the pillar base regarding the subway tunnel influence characteristic , proposed some feasible technical measures; Through regarding the project example analysis, has determined the reasonable construction plan, and has formulated the related technical measure. This article involves the design proposal, the computational method have the higher reference value regarding the similar pillar foundation engineering design as well as the subway guardianship work.