基坑支护毕业设计计算书

邯郸市康奈大厦基坑支护设计计算书

专 业：土木工程 姓 名：屈春来 指导教师：吴雄志

河北工程大学土木工程学院

摘 要

邯郸市康奈大厦位于邯郸市陵园路北侧，西临邯山南大街，建筑面积22849m2，地上8层，地下1层，框架剪力墙结构。该工程基础埋深5m，实际基坑开挖深度为4.75m，根据场地的土层条件及邯郸市类似基坑工程的经验，为保证基坑的稳定性及尽量节省投资，经方案比选，拟采用土钉墙技术及排桩+锚杆（北侧）对该基坑进行支护。

通过对拟建场地的工程地质条件分析，本工程存周围建筑物较多，北侧距离邯山区实验小学只有3.41米，工程土质较差需采用排桩维护。南侧和其他侧面距离重要建筑物较远，均采用人工放坡度土钉墙支护，细部设计见后文说明。

在本次基坑支护设计过程中，先后分析了4种方案：1.悬臂桩支护； 2.水泥土搅拌桩3.土钉墙支护；4.单支点排桩支护。对于悬臂桩支护方案，通过计算，桩长需要16m，桩体所承受的最大弯距较大，不合理；又因为土钉墙支护形式适合于较浅基坑，宜采用；通过对单支点排桩和悬臂桩两种支护方案的比较，考虑到降低成本，最终决定采用单支点排桩支护，土钉墙支护，

关键词：基坑支护 土钉墙 排桩

Abstract

The Kang Nai building locates in north side of Ling Yuan road of Han Dan city, and in the east of Han Shan South Avenue. It covers an area of 22.849m2 with on the ground is twenty-four layer and underground is one layer. It is the framework of shear wall structure. The works are based on depth of 5 m, the actual excavation depth is 4.75 m. according to the soil conditions of the site and similar excavation works experience of Han Dan City, to ensure the stability of the pit and save investment as much as possible. To be adopted soil nailing walls and piles + bolt row (north) to support the excavation.

Through analyzing for the engineering geological conditions of this project, there are many building around this project. The distance of the project and Han Shan experiment primary school have only 3.41 meters, the instability of soil to be used row pile maintenance. The distance from the south side and others to important buildings is further away. So it is to be used soil nail wall support.

In the pit supporting the design process, there has analyzed four types of scheme one after another: 1. Cantilever pile support; 2.cement-soil wall 3. Soil nailing wall support, 4. Pile in row single-Fulcrum care. The cantilever piles supporting need the length of 16m, so it is unreasonable .Soil-nailing wall support is usually to be used for shallow pit. Through comparing the single fulcrum piles and piles of cantilever support, taking into account the lower costs and ultimately decided to adopt the single-row piles supporting , soil nail wall support。

Key words: Pit Support ;Soil nailing- wall; Piles in row;

目 录

0绪论 ....................................................1 1.工程概况 ................................................1 2.工程地质及水文地质概况 ...................................2 3.设计依据 ................................................3 4.方案比较与选择 ..........................................4

4.1 初选方案 ........................................................ 4 4.2 方案确定 ........................................................ 4

5.单支点排桩围护的计算 .....................................7

5.1各土层土压力系数计算 ............................................ 7 5.2计算土层水平荷载，抗力标准值 .................................... 8 5.3单层支点结构支点力及嵌固深度hd设计值计算。 ...................... 9 5.4锚杆计算 ....................................................... 11 5.5位移计算（m法） ................................................ 13 5.6 腰梁设计 ...................................................... 20

6.土钉墙支护： ........................................... 21

6.1土钉设计参数如下： ............................................. 21 6.2土钉计算过程： ................................................. 22 6.3土钉稳定性验算 ................................................. 24

7.经济指标分析 ........................................... 29

7.1钢筋用量 ....................................................... 29 7.2混凝土土用量 ................................................... 29 7.3 水泥用量 ....................................................... 29 7.4土方工程计算 ................................................... 29

8施工监测方案 ............................................ 30

8.1土锚和土钉的验收与检测 ......................................... 30 8.2混泥土灌注桩质量检测 ........................................... 30 8.3桩顶水平位移监测 ............................................... 30

8.4临近建筑物、管线沉降变形监测 ................................... 30 8.5应急方案 ....................................................... 30

9.结束语 ................................................. 31 鸣 谢 ................................................. 32 参考文献 ................................................. 33 附件1读书报告 附件2专题报告

邯郸市康奈大厦基坑支护设计

学生：屈春来 指导教师：吴雄志

河北工程大学土木工程学院土木工程专业岩土工程方向

0绪论

近年来全国各地建筑深基坑支护工程发展很快，因建设需要基础愈做愈深，其支护结构难度 …… 此处隐藏：9715字，全部文档内容请下载后查看。喜欢就下载吧 ……