某城際鐵路深基坑開挖的風險評估及擾動效應研究.pdf

1、江西理工大學碩士學位論文獨創(chuàng)性聲明 學位論文獨創(chuàng)性聲明 本人聲明所呈交的論文是本人在導師指導下進行的研究工作及取得的研究成果。據(jù)我所知，除了文中特別加以標注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含已獲得江西理工大學或其他教育機構的學位或證書而使用過的材料。與我一同工作的同志對本研究所做的任何貢獻均已在論文中做了明確的說明并表示謝意。 申請學位論文與資料若有不實之處，本人承擔一切相關責任。 研究生簽名：

2、 時間： 年 月 日 學位論文版權使用授權書 本人完全了解江西理工大學關于收集、保存、使用學位論文的規(guī)定：即學校有權保存按要求提交的學位論文印刷本和電子版本， 學校有權將學位論文的全部或者部分內容編入有關數(shù)據(jù)庫進行檢索，并采用影印、縮印或掃描等復制手段保存、匯編以供查閱和借閱；學校有權按有關規(guī)定向國家有關部門或者機構送交論文的復印件和電子版。本人允許本學位論文被查閱和借閱， 同意學校

3、向國家有關部門或機構送交論文的復印件和電子版，并通過網(wǎng)絡向社會公眾提供信息服務。 保密的學位論文在解密后適用本授權書 學位論文作者簽名（手寫）： 導師簽名（手寫）： 簽字日期： 年 月 日 簽字日期： 年 月 日 Abstract II Abstract Revealing the risk level and disturbance effect in deep founda

4、tion pit excavation is a critical question in geotechnical engineering. With financial supports of National Science Foundation of China (E080506/51538550) and the Scientific research plan of the former Ministry of Railwa

5、ys ” Research on key technology of underwater shield railway tunnel(2011G013-C)”. Relying on the Working well deep foundation pit project at the exit section of FGZH-3 shield tunnel in Guangzhou South to Wanghong Section

6、 of Foshan to Guangzhou intercity railway, the risk of deep excavation construction was evaluated through the use of AHP, fuzzy comprehensive evaluation and other risk assessment methods; the disturbance effect of deep f

7、oundation pit excavation was studied through the combination of on-site monitoring and MIDAS/GTS numerical simulation; also the deformation law of foundation pit excavation is revealed in this paper, which can provides t

8、echnical support for the safety of deep excavation and the safety protection of adjacent structures. The main study contents is shown as: 1) The risk assessment index for deep excavation is established using the analytic

9、 hierarchy process; and the risk grade of deep excavation is quantified gradually from the single factor risk fuzzy evaluation through the fuzzy comprehensive evaluation theory; Finally, the risk level of deep excavation

10、 is determined. 2) A displacement and internal force monitoring program was developed based on the surrounding environment, geological and hydrological conditions, and excavation plans for the foundation pit; Subsequentl

11、y, the monitoring project, monitoring means, monitoring frequency, and measurement point layout standards were constructed, and the monitoring information was clarified and fed back to the construction in a timely manner

12、. 3) The on-site monitoring and numerical simulation of the entire excavation process of the deep excavation project, including the horizontal displacement of the wall, the settlement of the ground surface, the axial fo

13、rce of the support, and the horizontal/vertical displacement of the wall top were performed; the adaptability and rationality of the excavation model are verified through comparison and analysis of the two results; At th

14、e same time, the law and characteristics of deformation, the law and characteristics of force in the whole process of deep foundation pit excavation are obtained, which provides a basis for analysis of the law of deep ex