預(yù)應(yīng)力垂直錨重力式圍護(hù)結(jié)構(gòu)計算分析
黃翀,吳曉
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(湖南文理學(xué)院,常德 415000)[摘要]預(yù)應(yīng)力垂直錨重力式擋墻需要一種合理的工程計算方法。擋墻錨桿試驗表明,錨桿的預(yù)應(yīng)力隨著深度變化而不同,在穩(wěn)定分析和位移計算時要考慮相應(yīng)的折減系數(shù)。在試驗的基礎(chǔ)上,根據(jù)地基反力系數(shù)m法,建立了彈性擋墻的撓曲微分方程,通過冪級數(shù)求解,提出了預(yù)應(yīng)力錨桿式水泥土擋墻變形的工程計算方法,并結(jié)合工程實例對該方法進(jìn)行了驗證,驗證結(jié)果與試驗數(shù)據(jù)吻合較好,為預(yù)應(yīng)力錨桿式水泥土擋墻結(jié)構(gòu)設(shè)計提供了估算依據(jù)。[關(guān)鍵詞]重力式擋墻;錨桿;基坑Calculation and analysis of gravity wall reinforced by vertical prestressed anchorsHuang Chong,Wu Xiao(Hunan University of Art and Science, Changde 415000, China)Abstract:A new engineering method for calculating the gravity wall reinforced by vertical prestressed anchors is needed. The prestress of vertical anchored bar changed as the deepth changed and the reduction factor was considered based on some experimental results. According to m-method, the differential equations of an elastic retaining wall were established. A new engineering method was presented by a power series solution. The solution results and the test results agree well, and the new method could be an estimation reference.Keywords:gravity retaining wall; anchor; excavation湖南省科技計劃項目資助(批準(zhǔn)號:2008FJ3067)。作者簡介:黃翀,碩士,講師,Email:huangchonggf@163.com。參考文獻(xiàn)[1] 徐水根,李象范. 預(yù)應(yīng)力垂直錨補(bǔ)償重力式結(jié)構(gòu)在鬧市窄地基坑圍護(hù)中的應(yīng)用[J]. 建筑施工,2005,27(2):91-93.[2] 管飛,尹驥,李象范. 軟土深基坑預(yù)應(yīng)力重力式圍護(hù)結(jié)構(gòu)的設(shè)計與分析[J]. 巖土工程學(xué)報,2006,28:1605-1609.[3] DBJ08—61—97 基坑工程設(shè)計規(guī)程[S]. 上海:上海市勘察設(shè)計協(xié)會,1997.[4] 熊巨華,曹吉慶. 水泥土攪拌樁圍護(hù)結(jié)構(gòu)位移的綜合分析與計算[J]. 建筑技術(shù),2000,31(2):119-110.[5] 陳希哲. 土力學(xué)地基基礎(chǔ)[M]. 北京:清華大學(xué)出版社,2004.[6] JGJ120—99 建筑基坑支護(hù)技術(shù)規(guī)程[S]. 北京:中國建筑工業(yè)出版社,1999.[7] 何思明,李新坡. 預(yù)應(yīng)力錨桿作用機(jī)制研究[J]. 巖石力學(xué)與工程學(xué)報,2006,25(9):1876-1880.[8] 張興昌,夏錦紅. 單支點樁錨支護(hù)結(jié)構(gòu)的錨固力鎖定值影響因素的理論分析[J]. 建筑技術(shù),2008,39(5):388-389.[9] 李建軍. 土抗力法計算深基坑支護(hù)樁彎矩及實測分析[J]. 建筑結(jié)構(gòu),2010,40(3):52-54.[10] 陳愈炯,溫彥鋒. 基坑支護(hù)結(jié)構(gòu)上的水土壓力[J]. 巖土工程學(xué)報,1999,21(2):139-143.