摘 要
福建宁化粮油仓库位于宁化县翠江镇内，马运路与金枫路的交界处，交通便利。仓库的荷载为150kN/m2，弯矩为250kN•m，水平力为100kN。仓库为一层框架结构，长48.74m，宽18.48m。工程安全等级，场地等级，地基等级均为二级。场地地面标高在2.68～3.21m之间，相对高差为0.53m，原为农田，现已整平。场地内没有地表水系存在，场地西有一小河，水面标高为0.8m。根据地形勘察报告、上部结构设计图和荷载分布，初步选择沉管灌注桩基础，柱下独立基础和CFG（Cement fly-ash gravel）桩基础三种形式。经过方案论证，从技术上的可行性、经济上的合理性、工程的可靠性三方面综合考虑，最终决定选用柱下独立基础。基础埋深为2m，高为1m，分上下二阶，上阶高400mm，面积为1.5×1.5m2，下阶高为600mm，面积为3×3m2，混凝土保护层为40mm，变阶处ho为560mm，采用C15混凝土，Ⅰ级钢筋，配筋为 。承台下有一15mm厚的C15混凝土垫层。
关键词
仓库 沉管灌注桩基础 独立基础 CFG桩基础
Abstract
Storehouse of rice and oil is located in the town of Chui Jiang in Ning Hua ,on the crossing street of Ma Yun and Jin Feng. It is convenient for transportation, storehouse is capacity of bearing is 150kN/m2. Carving moment is 250kN•m and the vertical is 100kN. The safety level of construction is three, and the site, foundation level is two The site of construction height is the range of the 2.68～3.21 meter. The disparity of height is 0.5m. There was irrigate, but now is painted. The under ground of the site hasn’t the water exist. The river located the west of the site. The height of water is 0.8m. The design and arrangement capacity of bearing the up ground, construction firstly choosing vibro pile foundation, CFG pile and individual footing as the foundation treatment after the calculation and analysis form the economical and reliability of technology, in addition, the safety of structure. Finally, the individual footing as the best choice storehouse is the frame of structure the length is 48.74m, wide is 18.48m. The depth of foundation is 2m, the height is 1m. Which have two steps, the up step’s height is 400mm, the site is 1.5×1.5m2. The down step is 600mm and 3×3 m2,and the concrete protection is 40mm. The change of step height is 560mm. Using C15 concrete, Ⅰlevel steel. The arrangement of the steels is . There is have the fitted stratum which thickness is 15mm under the bearing plan.
Keywords: storehouse vibro pile foundation individual footing CFG foundation
目 录
前 言 1
1 工程概况 1
1.1 位置及交通概况 1
1.2 岩土工程勘察等级的确定 1
1.3 场地工程地质条件 1
1.3.1 地形地貌 1
1.3.2 地基土的构成及分布规律 1
1.3.3 场地水文地质条件 2
1.5 场地工程地质资料 3
2 方案论证 4
2.1 沉管灌注桩基础 4
2.1.1 选择桩型、桩材及桩长 4
2.1.2 确定单桩竖向承载力设计值 4
2.1.3 确定桩的数量和平面布置 5
2.1.4 群桩中单桩所受外力的验算 6
2.1.5 群桩承载力验算 7
2.1.6 群桩沉降计算 8
2.1.7 承台设计 10
2.1.8 沉管灌注桩的配筋计算： 12
2.2 柱下独立基础 13
2.2.1 基础埋深 13
2.2.2 确定基础底面积 13
2.2.3 基础设计 13
2.3 CFG桩基础 15
2.3.1 确定桩长 15
2.3.2 确定桩径： 15
2.3.3 确定桩间距 15
2.3.4 桩体强度 16
2.3.5 褥垫层的厚度 16
2.3.6 承台设计 16
2.4 技术上的可行性 16
2.5 经济上的合理性 17
2.6 工程的安全可靠性 17
3 质量检测与监测 17
4 施工工艺 17
4.1 基础的定位放样（线） 17
4.2 基坑开挖 18
4.3 验槽 18
4.4 支模 18
4.5 钢筋工程 18
4.6 浇筑混凝土 18
4.7 基坑的回填 18
5 计算机程序 19
工程设计参考文献码 20
专题论文 21
1 前言 21
2 试验 23
3 试验结论及其阐述 25
专题论文参考文献 27
外文翻译 28
