【作者】 李晓芳；

【导师】 梁建文； 李仙兰；

【作者基本信息】 天津大学 ， 建筑与土木工程， 2008， 硕士

【摘要】 近年来,随着经济的发展,社会的进步,我国城市基本建设规模逐渐加大,高层建筑、地下建筑、隧道等工程大幅度增加。为了节约地上空间,节省土地,充分利用地下空间的深基坑工程随之增加,这使得深基坑工程施工问题在技术和经济上对整个建筑施工起着举足轻重的影响。深基坑工程支护技术是在深基坑施工过程中的辅助工程,支护技术已经取得了很多成功经验,但针对不同土质的工程性质及具体工程实践应用的深基坑支护问题仍是岩土工程所关注的问题。本文依据具体工程实例和相关研究成果,对建筑物所处场地相对狭窄的特殊环境下,深基坑支护技术的应用作了对比性分析和实践性研究,并提出一些具有工程应用价值的建议措施和成果。全文包括四部分。第一部分:简要介绍选题背景;介绍深基坑工程及支护技术的主要内容、类型及存在的问题;本文研究的主要内容。第二部分:深基坑变形机理及设计计算的基本思路、规范的设计计算方法。第三部分:结合具体工程项目对狭窄场地下的深基坑支护技术进行分析,重点是某工程项目所采用的钻孔混凝土灌注桩、锚杆、锚喷护壁和挡土墙联合支护结构体系;提出针对狭窄场地情况下,改进和优化支护技术的几项措施,对该项目支护技术中的设计、施工、监测等应注意的问题进行研究,并提出具体的建议。第四部分结束语:深基坑支护技术的发展趋势。更多还原

【Abstract】 High buildings, underground structures and even the tunnels have been widely constructed during the recent decent with the fast development and progress of science and technology. The deep foundation became the favorite option for these structures in order to sufficiently use the underground space and saving the land resources, in which however, the construction technology of the deep foundation played critical role in structure performance and need to be paid more attention.The construction technology of deep foundation pit support is focused in this paper based on different geotechnical properties and special application in a project. As key part of procedure for the deep foundation construction, the deep foundation pit supporting technology has achieved plenty successful experience in some different area of China with the different ground conditions.According to study on many project application and research achievement of deep foundation pit support construction technology particular under narrow and long construction site condition, a comparison analysis and the practical study have been developed, a review and measurements have also been brought up based on the application.Four parts have been organized for the analysis and study as the follows:1. The background of the research, main technology, relevant classic and main problem of the deep foundation pit support, mean while the main objective of this paper were introduced in first part;2. The deformation mechanism, design method were presented in the second part;3. The deep foundation pit supporting technology of a project under narrow construction site has been analyzed, several optimized and improvement measurements and some design construction and monitor details need to be paid attention were brought up in third part.4. An conclusion remark and some future development trend of the deep foundation pit supporting technology are arranged in the last part.更多还原