建筑工程技术专业毕业设计论文-论建筑工程基坑围护施工技术

毕业论文

大学

毕 业 设 计

题 目 论建筑工程基坑围护施工技术 专 业 建筑工程技术

班 级 学 生

学 号 指导教师

二〇一 四 年 五 月 五 日

毕业论文

摘 要

基坑支护的本质要点就是止水挡土以供坑内安全施工，无论是重力式挡墙均是如此，只不过采用的计算方法和施工工艺不同。复合土钉墙成功解决了基坑边坡的强度及稳定性问题。期施工周期短，与挖土同时进行，很少的独立工期。 在建筑工程施工中,无论是对于项目整体还是局部工程,基础工程施工质量的好快对工程的整体质量产生直接影响。因此,在工程建设中,应与各个建筑工程的不同特点和实际情况相结合,对基础工程中的各项问题实施认真切实的分析,将基坑围护施工作为基础工程中的主要手段进行应用,进一步提升建筑工程基础质量。

关键词：建筑工程；基坑围护；施工技术；整体质量

Abstract

The essential points of foundation pit is to stop water retaining for pit construction safety, whether it is the gravity retaining wall are all so, but thecalculation method and construction technology of different. Composite soil nailing wall has successfully solved the strength and stability of foundation pit slope. During the short period of construction, and digging simultaneously, a

fewindependent time.

In the construction engineering construction, whether it is for the whole projector the local engineering, foundation construction quality quickly on the overall quality of the project have a direct impact. Therefore, in the engineering construction, should be combined with the different characteristics of each construction project and the actual situation, analysis of the problem of seriouspractical implementation of foundation engineering, the foundation pit construction as the main means of foundation engineering application, to further improve the construction quality of Cheng Jichu.

Key words: Construction Engineering; foundation pit; construction technology;quality

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第一章 目 录 工程概况 ....................................................................................................................... 1

1.2、地基条件及水文特征 ....................................................................................... 1

1.3基坑周边环境概况 .............................................................................................. 1

1.4支护方案的选择 .................................................................................................. 2

第二章 施工方案 ............................................................................................................................. 3

2.1基坑土方开挖 ...................................................................................................... 3

2.2降水工程施工方案 .............................................................................................. 3

2.3基坑支护方案 ...................................................................................................... 4

2.4边坡变形观测方案 .............................................................................................. 5

2..5排水处理 ............................................................................................................. 6

2.6基坑后期维护 ...................................................................................................... 6

第三章、各分部分项工程的施工方案及质量保证措施 ............................................................... 7

3.1灌注桩施工 .......................................................................................................... 7

3.1.1施工要求 ........................................................................................................ 7

3.1.2施工工艺流程图 ............................................................................................ 8

3.1.3桩位测放及护筒埋设 .................................................................................... 9

3.1.4钻进成孔 ........................................................................................................ 9

3.1.5清孔 .............................................................................................................. 10

3.1.6钢筋笼制作、吊安 ...................................................................................... 10

3.1.7钢构立柱的制作 .......................................................................................... 11

3.1.8安放导管 ...................................................................................................... 11

3.1.9水下砼灌注 .................................................................................................. 12

3.1.10 灌注桩质量保证措施 ............................................................................... 13

3.1.11钢构立柱桩施工质量措施 ........................................................................ 14

3.1.12 灌注桩质量检验 ....................................................................................... 15

3.2三轴深搅桩施工方法 ....................................................................................... 15

3.2.1三轴水泥土搅拌桩施工要求 .................................................................... 15

3.2.2搅桩施工工艺流程 .................................................................................... 15

3.2.3主要施工方法 .............................................................................................. 17

3.2.3三轴搅拌桩施工质量控制 .......................................................................... 22

3.2.5 三轴搅拌桩质量检测 ................................................................................. 23

3.3降水井施工 ....................................................................................................... 23

3.3.1.降水管井的施工要求： .............................................................................. 23

3.3.2主要施工工艺 .............................................................................................. 23

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3.3.3降水运行措施 .............................................................................................. 24

3.4支撑梁施工方法 ............................................................................................... 24

3.4.1圈梁、围檩及支撑施工要求 ...................................................................... 24

3.4.2施工流程及施工阶段划分 .......................................................................... 25

3.4.3主要施工方法 .............................................................................................. 26

3.4.4质量措施 ...................................................................................................... 29

4.5土方单位挖土需注意事项 ...................................................................................................... 29

第5章第四章 施工中有关问题的影响及处理措施 ................................................................... 31

5.2局部垮塌 ........................................................................................................... 33

5.4裂缝处理 ........................................................................................................... 34

5.5软弱层处理 ....................................................................................................... 34

结 论......................................................................................................................................... 34

致 谢......................................................................................................................................... 36

参考文献......................................................................................................................................... 37