【作者】 曹小兵；

【导师】 孔思丽；

【作者基本信息】 贵州大学 ， 岩土工程， 2007， 硕士

【摘要】 基坑工程是一个复杂的地质工程问题，它既涉及到基坑自身强度与稳定性，又包含了地质环境和社会影响问题。在基坑开挖过程中，除了要保证基坑的安全，使坑内和坑外的各种工程顺利施工，还要保证相邻建筑物和地下管线等设施的安全。本文主要研究贵州山区深基坑变形，利用有限单元法，通过大型有限元程序ANSYS10.0来进行模拟计算。将所研究问题假定为平面应变问题；岩土体为理想弹塑性模型，采用平面四节点等参单元，遵循适于岩土的Drucker-Prager屈服准则；桩与岩土体之间通过设置接触单元来模拟基坑围护桩桩与岩土体的相互作用，重点分析了建筑物与基坑的不同距离、基坑围护桩的刚度变化和围护桩底端土体物理力学参数变化时基坑开挖对基坑及建筑物变形的影响。本文得到了一些对基坑工程设计和施工有意义的结论，可供基坑工程设计、施工和研究基坑开挖对周围环境影响时参考。由于现阶段有关基坑和近邻建筑物变形的研究较少，本课题的研究成果还将对今后相关的数值模拟分析具有参考价值。更多还原

【Abstract】 The excavation engineering is a complex geological engineering problem, it concludes not only the strength and stability of excavation, but also geological environment and social affects. In excavating process, it ensures the safety of excavation, in order to construct all kinds of engineering, and ensures the safety of the adjacent buildings, underground pipe-lines and other facilities.This paper studies the deformation of deep excavation in GuiZhou’ mountainous area. The finite element method and large finite element method program ANSYS10.0 is used to simulate and analyze excavation and adjacent buildings interaction. In the model, problem of the study has been presumed as plane strain problem. Seemly, the soil is seemed as ideal elastoplastic model, and use four node equal-parameter element which abides by Drucker-Prager yield criteria of soil. At the same time, contact element is set between pile and soil to simulate their interaction. What is more, This paper has analyzed excavation and adjacent buildings interaction in the different distance of excavation and adjacent buildings, the different stiffness of bracing system, and the different physical mechanics parameter of soil.At last, some valuable conclusions benefit from design, construction of excavation engineering and research about excavation and adjacent buildings interaction. Now the research on excavation and adjacent buildings interaction is lacking, therefore, the results can be used as reference for the relevant numerical simulation and other research.更多还原