- 摘 要
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(1.華東建筑設(shè)計研究院有限公司,上海,200002;2.上海交通大學(xué)土木工程系,200030)
［提要］ 基于深基坑工程實踐提出了基坑支護(hù)結(jié)構(gòu)計算的三維“m”法，建立用于分析支護(hù)結(jié)構(gòu)的空間效應(yīng)的三維計算模型。提出了模擬目前工程中常用的分區(qū)開挖與盆式開挖的方法和相應(yīng)的被動區(qū)土體基床系數(shù)的計算公式，同時將坑內(nèi)被動區(qū)土體基床系數(shù)的比例系數(shù)(m值)表示為時間的函數(shù)來反映深基坑工程的時間效應(yīng)。方法在上海南站北廣場及其相關(guān)工程中得到了應(yīng)用，效果較好，表明考慮時空效應(yīng)計算方法合理實用。
［關(guān)鍵詞］ 深基坑工程 時空效應(yīng) 三維“m法 盆式開挖 分區(qū)開挖 空間效應(yīng) 時間效應(yīng)
Research on Calculation Method Considering Timespace Effect in Deep Excavation Projects/Shen Jian1， Wang Weidong1， Wang Jianhua2(1 East China Architecture Design & Research Institute Co.,Ltd., Shanghai 200002, China; 2 Shanghai Jiaotong University, Shanghai 200230, China)
Abstract:Based on engineering practice, the 3D “m” method of retaining structure in deep excavations is put forward. The 3D calculation model of retaining structure is used to analyze the space effect of retaining structures, and the formula of k h value in passive area, when using 3D “m” method to simulate sub area excavation and basin excavation which are two common construction methods in practical projects, is also introduced. The “m” value of soil is expressed as a function of time to reflect the time effect of deep excavation projects. Good effect is acquired through the application of this method in the project of north square on Shanghai south railway station and other relevant projects, and it is indicated that the calculation method is rational and practical.
Keywords:deep excavation projects; timespace effect; 3D “m” method; sub area; basin
*上海市科委重點攻關(guān)項目:深層地下結(jié)構(gòu)開發(fā)關(guān)鍵技術(shù)研究(052112010)。
