最新基坑支护设计5876604

基坑支护设计5876604

毕业设计（论文）

设计(论文)题目：金陵科技学院大学科技园一期工程基坑支护设计

目录

摘要 ............................................................................................................................................... I II Abstract ........................................................................................................................................... I V 1 基坑设计方案综合说明. (1)

1.1 设计依据 (1)

1.1.1岩土工程报告 (1)

1.1.2基坑周边环境 (1)

1.1.3基坑开挖深度 (1)

1.1.4规范 (1)

1.2 工程概况 (1)

1.3 地质概况 (1)

1.3.1地形地貌 (1)

1.3.2工程实地土堪结果总结 (1)

1.3.3水文地质条件 (2)

1.4设计思路 (2)

1.5方案选择 (2)

2 基坑设计计算书 (4)

2.1 土层参数计算 (4)

2.2 计算段面分布 (4)

2.3 各段支护结构设计计算 (4)

2.3.1各段面计算参数及土压力计算 (4)

2.3.2反弯点计算 (7)

2.3.3土压力合力及合力臂计算 (8)

2.4 支撑轴线向力设计计算 (9)

2.5 桩长设计计算 (10)

2.5.1桩长计算 (10)

2.5.2最大弯矩计算 (11)

2.6 构件配筋 (14)

2.6.1桩身配筋 (14)

2.6.2内支撑设计 (14)

2.6.3冠梁 (16)

3 基坑设计验算 (18)

4 止水桩（帷幕）设计 (22)

5 基坑设计软件验算 (23)

5.1 J1-1断面段支护结构电算 (23)

5.2 J2-2断面段支护结构电算 (32)

5.3 J3-3断面段支护结构电算 (42)

6 监测 (52)

6.1 监测目的和目标 (52)

6.2监测依据 (52)

6.3监测内容及项目 (52)

6.4现场监测频率与监测周期 (52)

结论 (53)

参考文献 (54)

金陵科技学院大学科技园一期工程基坑支护设计

摘要

本工程为金陵科技学院大学科技园一期工程支撑式支挡结构设计。该基坑预计为一层地下室，开挖尺寸为110m×100m，建筑±0.00相当于绝对标高

+18.000m，地下室底板顶标高为-5m,开挖深度为6m。

综合考虑基坑挖深、水土问题裙边环境、施工场地条件及施工季节等条件，拟采用排桩和钢筋混凝土支撑的组合支护结构型式。在工程实地中，对于现场支护桩体的使用，施工单位都有各自成系统的一系列施工方法与选择的工艺，可能进行预制，或者现场钻打孔并且进行清理，而后采用级配合理的混凝土进行灌浇，待成形稳固后进行其他的后续操作，对于受力较为复杂的薄弱边以及阴阳角部位，采用内部支撑（角撑与对撑）。对于现场水位较高，通过在场地周围遍布止水桩能够得到很好的解决，但是务必做到完全封闭，再配合排水沟亦或是降水井，则能够更好的保证基坑内部干燥的施工环境。

关键词：支护桩; 角撑; 对撑；止水桩

The first phase of Design of foundation pit supporting engineering of Jinling Institute of Technology

Abstract

The design for the Jinling Institute of Technology University Science and Technology Parkproject braced retaining structure design. The foundation pit is expected for the two layer of the basement, the size of first excavation is 110m×

100m, construction elevation ±0.000m is equivalent to the absolute elevation

+18.000m. the first layer of the basement top elevation is -5m,the excavation depth is about 6m.

Considering the deep excavation, soil and water environment problems, construction site conditions and the border condition of the construction

season, the row of piles andreinforced concrete supporting composite retaining structures. In the engineering field, thefield teams with the supporting

piles, construction units have a series of constructionmethods and choose their

own system, may be preformed, or on-site drill and clean up,and then use

the reasonable gradation concrete pouring, to form stable after follow-up of other operations, for the weak side force is more complex and the Yin and

Yang corners,using the internal support (with gusset bracing). For the water level is higher, by around the grounds around the water pile can be solved, but must

be completely closed, with thedrainage ditch or dewatering well, can better guarantee the pit inside the dry construction environment.

Key Words：s upporting pile；opposite support；sealing pile ；angle brace