本文選題：超前微樁 + 復(fù)合土釘支護(hù)　； 參考：《工程力學(xué)》2014年03期

【摘要】：超前微樁復(fù)合土釘支護(hù)是一種經(jīng)濟(jì)有效的基坑支護(hù)形式,但對(duì)其設(shè)計(jì)分析方法的研究遠(yuǎn)落后于工程實(shí)踐。該文在對(duì)此種復(fù)合土釘支護(hù)的構(gòu)造及工作性能進(jìn)行簡(jiǎn)要分析的基礎(chǔ)上,對(duì)其整體穩(wěn)定驗(yàn)算方法和變形計(jì)算方法進(jìn)行討論,借鑒已有的一些相關(guān)研究提出了相應(yīng)的簡(jiǎn)化計(jì)算方法。針對(duì)其整體穩(wěn)定驗(yàn)算,提出考慮微樁-土相對(duì)剛度采用不大于2.5倍特征長(zhǎng)度上土體被動(dòng)抗力來考慮微樁作用的建議,從而給出一種較為簡(jiǎn)便的整體穩(wěn)定驗(yàn)算方法,就一些實(shí)際工程的計(jì)算對(duì)比表明所建議的方法合理可行。針對(duì)其坑壁位移計(jì)算,在仔細(xì)分析此種支護(hù)體系受力變形機(jī)理的基礎(chǔ)上,基于基坑支護(hù)計(jì)算的增量法及彈性地基梁求解的鏈桿法,提出一種思路清晰的簡(jiǎn)化計(jì)算方法,給出了具體的計(jì)算模型、參數(shù)確定方法及問題求解方法,并通過與有限元計(jì)算及工程實(shí)測(cè)的對(duì)比對(duì)所提出的方法進(jìn)行了檢驗(yàn)。
[Abstract]:The composite soil nailing support of advanced micro-pile is an economical and effective form of foundation pit support, but the research on its design and analysis method lags far behind the engineering practice. Based on a brief analysis of the structure and working performance of the composite soil nailing support, this paper discusses its overall stability checking method and deformation calculation method, and puts forward corresponding simplified calculation methods for reference to some related studies. Considering the relative stiffness of micro-pile and soil, the paper proposes that the passive resistance of soil not more than 2.5 times the characteristic length should be taken into account in order to consider the action of micro-pile, and a simple method of overall stability checking is given. The comparison of some practical projects shows that the proposed method is reasonable and feasible. According to the calculation of the displacement of the pit wall, based on the careful analysis of the mechanism of stress and deformation of the supporting system, a simplified calculation method is proposed based on the incremental method of foundation pit support calculation and the chain bar method for solving the elastic foundation beam. The concrete calculation model, parameter determination method and problem solving method are given, and compared with finite element calculation and engineering measurement, the proposed method is tested.
【作者單位】： 清華大學(xué)土木工程系;土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室;電力規(guī)劃設(shè)計(jì)總院;
【基金】：國(guó)家支撐計(jì)劃項(xiàng)目(2008BAJ06B01-5)
【分類號(hào)】：TU476

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李維樹,黃志鵬,丁秀麗,(鳥阝)愛清;基于抗滑樁計(jì)算寬度的水平推力試驗(yàn)研究[J];長(zhǎng)江科學(xué)院院報(bào);2005年05期

2 郭紅仙;宋二祥;陳肇元;;土釘支護(hù)開挖影響面及其在土釘力計(jì)算中的應(yīng)用[J];工程力學(xué);2007年11期

3 魏煥衛(wèi);宋豐波;楊敏;孫劍平;;復(fù)合土釘墻變形的簡(jiǎn)化計(jì)算方法[J];工程力學(xué);2011年S1期

4 陸培炎;橫向荷載下土、樁共同作用的簡(jiǎn)化法[J];廣東水電科技;1991年01期

5 楊光華,陸培炎;深基坑開挖中多撐或多錨式地下連續(xù)墻的增量計(jì)算法[J];建筑結(jié)構(gòu);1994年08期

6 魏屏;楊敏;劉斌;;復(fù)合土釘墻整體穩(wěn)定性計(jì)算中折減系數(shù)ξ和η的研究[J];結(jié)構(gòu)工程師;2010年04期

7 魏煥衛(wèi);楊敏;孫劍平;賈強(qiáng);;土釘墻變形的實(shí)用計(jì)算方法[J];土木工程學(xué)報(bào);2009年01期

8 楊志銀,張俊,王凱旭;復(fù)合土釘墻技術(shù)的研究及應(yīng)用[J];巖土工程學(xué)報(bào);2005年02期

9 宋二祥,高翔,邱s，

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