桩锚支护结构在深基坑工程中的应用与控制研究

发布时间：2018-03-01 23:06

本文关键词： 深基坑桩锚支护结构支护设计施工监测　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：目前，随着我国城市建设的迅猛发展，城市发展空间已基本饱和，合理开放和利用城市地下空间变得尤为迫切。相应，城市建设深基坑工程数量越来越多，深度越来越深；同时由于深基坑工程相邻地下设施和周围环境的安全要求又比较高，稍有不慎，一旦出现事故，影响和损失极大，对深基坑工程的支护结构进行研究显得尤为必要。桩锚支护结构是由排桩挡土结构和预应力锚杆锚拉结构组成的深基坑支护体系，具有刚度大、变形小、挡土能力强、止水效果好、工程适应性广泛等明显优点，近年来被广泛应用于深基坑支护中，并在理论和实践上均得到一定发展。本文在广泛收集整理及研究国内外深基坑支护结构研究成果的基础上，以北京京广商务中心外企员工餐厅工程为例，主要分析研究了以下内容：（1）探讨了桩锚支护结构国内外研究的现状与意义；（2）介绍了桩锚支护结构的基本概念，讨论分析了桩锚支护结构的构造特点、工作机理及工程适用环境；（3）对桩锚支护结构的相关设计理论进行了研究探讨，并结合工程设计实践进行了分析讨论；（4）结合工程实践，，对桩锚支护结构的施工技术进行了研究讨论，提出了相关工序的改进措施；（5）结合工程实践，对桩锚支护结构信息化施工进行探索研究，分析探讨了深基坑桩锚支护结构的监测及变形控制问题。通过结合工程实践进行实际验证，并进行深入的研究分析可知，桩锚支护结构工程适应性强、施工方便、工程造价相比其他支护结构相对较低，同时，从实施结果来看，实际的变形较小，各项技术指标基本符合相关基本理论，深基坑的安全性和稳定性能够得到保证。
[Abstract]:At present, with the rapid development of China's city construction, city development space has been basically saturated, open and reasonable utilization of the underground space in city has become particularly urgent. Accordingly, deep foundation pit engineering in city construction are getting more and more deeper and deeper; at the same time as the safety requirements of deep foundation pit adjacent underground facilities and the surrounding environment is relatively high, the slightest mistake, once an accident occurs, the impact and the loss is great, very necessary to research the deep foundation pit supporting structure is supported.
Pile anchor retaining structure is composed of row pile retaining structure with prestressed anchor anchor structure of deep foundation pit supporting system with high stiffness, small deformation, retaining ability, good sealing effect, wide adaptability and other engineering advantages, in recent years has been widely used in deep foundation pit, and in theory and practice have developed to some extent. Based on the extensive collection and research of deep foundation pit supporting structure on the research results, the foreign staff restaurant project of Beijing Guangzhou business center as an example, analysis the main research contents are as follows:
(1) the present situation and significance of the research on the pile anchor support structure at home and abroad are discussed.
(2) the basic concepts of pile anchor support structure are introduced, and the structural features, working mechanism and application environment of the pile anchor support structure are discussed and analyzed.
(3) the related design theory of pile anchor support structure is studied and discussed, and the analysis and discussion are carried out in combination with the engineering design practice.
(4) combining with the engineering practice, the construction technology of pile anchor support structure is studied and discussed, and the improvement measures of the related process are put forward.
(5) combined with engineering practice, the information construction of pile anchor support structure is explored, and the monitoring and deformation control of pile anchor supporting structure for deep foundation pit is analyzed.
The actual verification by combining with engineering practice, and in-depth research and analysis, pile anchor retaining structure of strong adaptability, convenient construction, construction cost compared to other supporting structure is relatively low, at the same time, from the implementation of the results, the actual deformation is small, various technical indicators in line with relevant basic theory, the deep foundation pit safety and stability can be guaranteed.

【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU753

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