土木土建4220kV变电站桩基础设计毕业设计.docVIP

220kV变电站桩基础设计 摘 要 变电站上部结构为变电室和生产楼等结构，而下部结构为基础，包括天然地基基础和桩基础。基础工程包括建筑物的地基与基础的设计与施工。为了保证风电场的正常使用与安全，地基与基础必须具有足够的强度和稳定性，变形也应在允许范围之内。根据地层变化情况、上部结构的要求、荷载特点和施工技术水平，可采用不同类型的地基和基础。 本文以江苏东台风电场220kV变电站基础设计为例，依据中国水电工程顾问集团华东勘测设计研究院提供的勘查报告，深入了解了工程建筑区的地形地貌、地质构造、水文地质条件、岩土力学性质和物理地质现象等工程地质条件，对拟建工程场区进行评价，并提出岩土力学指标的建议值和该变电站桩基础设计。 首先根据工程地质条件、岩土力学指标建议值和上部结构形式及上部结构重量，选取了桩基础形式——混凝土预应力管桩。在对天然地基的评价的基础上，进行了成桩分析。根据混凝土预应力管桩的优缺点，结合场地地层条件，初步选取桩径，试算出桩长，并进行桩的设计计算：单桩承载力和桩的沉降计算，最后从抗剪、冲切和抗弯等三方面对承台进行了设计验算。 关键词: 变电站；地基；预应力管桩；沉降；承台 Abstract The superstructure for the Substation is buildings for producing electriction, and its substructure is foundation which include natural foundation and the pile foundation. Infrastructure projects s include the design and construction for the foundation of the building. In order to ensure the normal use and security for the Substation, foundations must have adequate strength and stability, deformation should also be in allowing scope. According to the formation,s change, the upper structure, the load characteristics and the construction skills, using different types of foundations . This paper is mainly about 220 kV substation foundation design as an example, based on Chinas hydropower engineering consultancy group of East China Survey and Design Institute of the investigation reports, in-depth understanding the engineering geological conditions of the engineering geological sites such as architectural landscape, geological structure hydrogeology conditions, the physical and mechanical properties of the soil and the physical phenomena. Evaluates the proposed project sites, renders the proposed indicators of the rock mechanics and selection and the pile foundation design. . First according to geological conditions, rock mechanics and the upper structure of the proposed form and structure of the upper weight, select a pile foundation forms - Prestressed Concrete Piles.On the basis of the evaluation of the natural foundation , analysis of the pile. According to the