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摘 要
基础设计是结构设计的重要组成部分。本工程的工程为嘉兴市南湖区社保局办公楼基础设计，现浇混凝土框架结构，建筑高度27m，共6层，总建筑面积为4400m2，抗震设防烈度为七级，建筑物设计使用年限为50年。
本设计的设计内容主要是根据所给的建筑图确定作用在基础上的荷载大小，然后根据所给的工程地质报告，结合上部结构情况采用合理基础的形式，并进行分析说明，另外进行基础的设计，画出基础施工图。
经分析，该工程采用桩基础，桩基础具有承载力较大，沉降较小的特点。桩基础的设计内容包括：柱底荷载计算、桩身结构设计、承台的设计以及沉降计算等。
关键词：基础设计；桩基础；承台；沉降计算；施工图
ABSTRACT
Foundation design is an important part of structural design. This project is the foundation design of Social Security Bureau office building in nanhu District, Jiaxing. Building is a shape with structure of cast-in-place reinforced concrete frame structure. Building’s height is 15 meters, A total construction area is 4400 square meters with six floors , the seismic intensity is 7 degrees, the design life is 50 years.
The content of this design is mainly based on the construction drawings to determine the size of the load acting on the foundation, then according to engineering geology report and the super structure , to adopt reasonable foundation , and analyzed. In addition to the design foundation, draw the Construction drawing.
According to analysis, the project uses the pile foundation. The pile foundation has the characteristics of high Bearing capacity and smaller settlement. Pile foundation design includes: calculation of the bottom load, the design of pile structural , the design of pile cap and Settlement calculation.
Keywords：Foundation design; Pile foundation; Cap; Settlement calculation The Construction drawing | 
