xx大厦基坑支护设计.doc

xx大厦基坑支护设计

摘 要
    邯郸市滏河大厦位于邯郸市邯郸市区南部，光明大街西侧原光明饮料厂内，地上29层，建筑高度87.0m，结构形式拟采用框架结构，地基基础设计等级均为乙级。基坑深度8m。
    通过对滏河大厦场地的工程地质条件分析，地下水位较浅且紧邻滏阳河，因此采用挡水措施。由于对基坑深度问题和周围环境的考虑，因此可试着考虑采用较简单的经济的基坑支护措施，以保证基础正常施工和主体地下结构的安全及周围建筑物不受损害，并且达到技术要求。
    在本次基坑支护设计过程中，考虑到施工安全、质量、经济等原因，根据场地的土层条件及邯郸市类似基坑工程的经验，为保证基坑质量的同时尽量节省投资，对基坑壁先进行了等级划分，对不同等级的基坑壁拟采用不同的支护方案。先后制定了三种方案：1.单支点支护；2.土钉墙支护；3.水泥土挡墙支护。对于水泥土挡墙方案，让其兼做防水帷幕，可起到挡水的作用。
　关键词：水泥土挡墙  单支点排桩  基坑支护  经济
Abstract
    Handan furong raw material the handan city building is located at the river south west street, bright light, the ground in the SAN 87.0 29 layer, building height is used structure forms m, frame structure, foundation design level are serie b. Excavation depth 8m.
    Through field of furong raw material of the engineering geological river building are analyzed, and close to a shallow underground water level, so the method YangHe cauldron retaining water measures. Because of foundation pit depth and the surrounding environment consideration, so you can try to consider using a relatively simple economic foundation pit supporting measures, to ensure the basic normal construction and main body of underground structures safety and surrounding buildings is not compromised, and achieve technical requirements.
     In this Ji the pit protect the design the process, in consideration of construction safety, quality, economy etc. reason, according to condition and the Han Dan City of the soil layer of the place similar the Ji pit experience of the engineering, is assurance Ji pit quality of in the meantime as far as possible economical investment, to Ji pit wall forerunner line grade divide the line, to dissimilarity the Ji pit wall of the grade draw up adoption dissimilarity of protect a project.Successively establishment three kinds of project:1.The list fulcrum protect;2.The soil nail a wall to protect;3.The cement soil block a wall to protect.Block a wall project to the cement soil, let it and do a watertightness purdah, can there is function of block water.
  Keyword：The cement soil block the wall   list fulcrum row a stake   The Ji pit protect economy

摘 要 1
0 绪论 3
1 工程概况 3
1.1 工程地质勘察资料 3
1.2 基坑工程的主要内容 4
1.3 设计方案比较及使用方案 8
2 沉降、位移观测布置及方法 8
3 单支点方案 11
3.1 求支点力 11
3.2 嵌固深度计算 12
3.3 求最大弯矩 14
(2) 配筋计算 14
3.4 锚杆设计 15
3.5 锚杆防锈设计 23
4 北侧基坑支护计算 24
4.1 土压力 24
4.2 稳定性验算 27
4.3 应力计算 28
4.4 基底地基承载力验算 28
4.5 格仓压力验算 29
4.6 挡墙水平位移计算 29
5 土钉墙设计计算 29
5.1 土钉参数确定 29
5.2 整体稳定性验算 31
5.3 抗滑移稳定性验算 32
5.4 抗倾覆稳定性验算 33
6 工程应急预案 33
6.1 预案处理权限 33
6.2 潜在事故危险性分析 33
6.3 应急救援的职责与分工 34
6.4 紧急处理措施 34
7 各方案经济指标计 35
参考文献 38