【摘要】：基坑支護是深基坑工程的重要組成部分。近些年來,隨著國家基礎設施的大力推進與逐漸完善,基坑支護更是得到了快速的發(fā)展,各種適應基坑實際狀況和要求的新支護技術不斷涌現(xiàn)。而建筑基坑逆作法作為一種相對成熟的支護技術,由于其原理簡單,加上社會和經(jīng)濟效益明顯,在建筑相對密集的城市運用的越來越普及。因此,對深基坑逆作法的施工技術與結構分析進行系統(tǒng)研究,這對于基坑工程的發(fā)展具有重要的理論價值和現(xiàn)實意義。本文以貴州都勻福安凱萊大飯店基坑工程為背景,在支護樁已經(jīng)施工完成后,由于錨桿施工不成功,被迫將原有樁錨支護方案改為采用逆作法,進行后續(xù)工程施工。逆作法施工中由于結構變動,導致車道由原來位置移動到最靠近支護樁的主體結構的邊緣,使逆作法施工下荷載的傳遞對主體結構變得極為不利,在這種背景下本文做了以下主要研究與分析:(1)闡述基坑支護工程中逆作法的技術特點,并通過分析總結國內(nèi)外的研究現(xiàn)狀,說明該支護形式安全可靠、經(jīng)濟適用,有良好的應用前景。(2)對現(xiàn)場監(jiān)測數(shù)據(jù)進行整理分析,重點研究了支護樁身的現(xiàn)場監(jiān)測彎矩變化情況,由于方案改變導致樁身強度變化,我們用理正基坑設計軟件對原樁錨支護方案進行分析,與現(xiàn)場監(jiān)測對比擬合,分析樁身變形情況。(3)采用彈塑性有限元分析方法對框架節(jié)點變更前后基坑周圍地表沉降值、支護樁的內(nèi)力與變形、主體結構變動位置的框架內(nèi)力與變形進行了數(shù)值仿真模擬與整體分析。(4)針對逆做法過程中遇到的節(jié)點位置變化,探究節(jié)點區(qū)剛度對框架性能的影響,并提出了對該部分框架柱強度和剛度的補強方案。
[Abstract]:Foundation pit support is an important part of deep foundation pit engineering. In recent years, with the national infrastructure vigorously promoted and gradually improved, foundation pit support has been rapid development, a variety of new support technology to adapt to the actual conditions and requirements of foundation pit has been emerging. As a relatively mature supporting technology, the inverse method of building foundation pit is more and more popular in cities with relatively dense buildings because of its simple principle and obvious social and economic benefits. Therefore, it is of great theoretical value and practical significance to study the construction technology and structure analysis of deep foundation pit inversion method, which is of great theoretical value and practical significance for the development of foundation pit engineering. Based on the foundation pit project of Caile Hotel in Duyun, Guizhou Province, after the construction of the supporting pile has been completed, because of the unsuccessful construction of the anchor rod, it is forced to change the original pile-anchor support scheme to the reverse method and carry out the subsequent construction. Because of the structural change in the reverse construction, the driveway moves from the original position to the edge of the main structure nearest to the supporting pile, which makes the load transfer under the reverse construction extremely unfavorable to the main structure. Under this background, this paper has done the following main research and analysis: (1) expound the technical characteristics of the inverse method in the foundation pit support engineering, and through the analysis and summary of the domestic and foreign research status, it is proved that the supporting form is safe and reliable, economical and applicable. It has a good application prospect. (2) the field monitoring data are analyzed, and the change of in-situ monitoring bending moment of the supporting pile body is studied, which results in the change of the pile strength due to the change of the scheme. We use the design software of Lizheng Foundation Pit to analyze the original pile-anchor support scheme, and compare with the field monitoring to analyze the deformation of the pile body. (3) using the elastic-plastic finite element analysis method to analyze the ground settlement value around the foundation pit before and after the change of the frame joint. The internal force and deformation of the supporting pile and the internal force and deformation of the frame of the main structure are numerically simulated and analyzed. (4) the change of the node position in the process of inverse method is analyzed. In this paper, the influence of the stiffness of the joint zone on the performance of the frame is investigated, and the reinforcement scheme of the strength and stiffness of the frame column is proposed.
【學位授予單位】：湘潭大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU753

【參考文獻】

相關期刊論文 前10條

1 印長俊;陽文勝;馬鵬遠;;地鐵基坑開挖對臨近地下通道的影響規(guī)律研究[J];湖南工程學院學報(自然科學版);2016年02期

2 宋少云;尹芳;;有限元網(wǎng)格劃分中的圣維南原理及其應用[J];機械設計與制造;2012年08期

3 王衛(wèi)東;朱合華;李耀良;;城市巖土工程與新技術[J];地下空間與工程學報;2011年S1期

4 王志明;胡克旭;;鋼筋混凝土框架節(jié)點受力機制及加固方法評述[J];工業(yè)建筑;2011年S1期

5 郭容寬;江云亮;葛春雷;;外包鋼套與加大截面綜合加固法的探討[J];價值工程;2011年09期

6 余江滔;蘇磊;陸洲導;張克純;;玄武巖纖維加固震損三維混凝土框架節(jié)點抗震試驗[J];同濟大學學報(自然科學版);2011年01期

7 余江滔;陸洲導;張克純;;震損鋼筋混凝土框架節(jié)點修復后抗震性能試驗研究[J];建筑結構學報;2010年12期

8 陸洲導;劉長青;張克純;王煥杰;;外包鋼套法加固鋼筋混凝土框架節(jié)點試驗研究[J];四川大學學報(工程科學版);2010年03期

9 張如林;徐奴文;;基于PLAXIS的深基坑支護設計的數(shù)值模擬[J];結構工程師;2010年02期

10 高俊合,趙維炳,周成;考慮固結、土-結構相互作用的基坑開挖有限元分析[J];巖土工程學報;1999年05期

相關碩士學位論文 前3條

1 邢旭亮;半逆作法深基坑設計與實踐[D];南昌航空大學;2015年

2 金人杰;超大深基坑坑邊逆作法施工技術的應用研究[D];同濟大學;2007年

3 趙曉艷;新老混凝土機械連接結合性能研究[D];河北工業(yè)大學;2004年

，

本文編號：2372343