884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

      蔡偉銘  熊祚森
    （同濟(jì)大學(xué)地下系  上海 200092）

[提要]  軟土地基上的深基坑支護(hù)結(jié)構(gòu)都采用多支撐形式，本文采用土體彈簧系數(shù)K=C v廠(chǎng)Z（即通常稱(chēng)之為“C”法），并考慮分步開(kāi)挖逐層支撐的施工過(guò)程對(duì)支撐力、樁身內(nèi)力及位移的影響，推導(dǎo)了以撓曲線(xiàn)方程為基礎(chǔ)的計(jì)算方法，是繼“m”法之后的又一發(fā)展。該法便于計(jì)算，對(duì)于少于三道支撐的情況，用手算也很方便，對(duì)于更多支撐的情況則可采用電算。“C”法比“m”系數(shù)法更適合于軟土地基，計(jì)算結(jié)果與實(shí)測(cè)位移曲線(xiàn)很吻合。
[關(guān)鍵詞]  支擋結(jié)構(gòu) 多支撐 彈性曲線(xiàn) 彈簧地基 C模型 開(kāi)挖過(guò)程

Multi-Braced retaining .structures have been widly employed in deep excavation. A calculating method using spring factor of K =Cv廠(chǎng)Z is presented in this paper, having taken into account the effect of staged excavation upon the bracing force, andthe internal force and displacement of retaining wall. This is a development following "m" method. For soft soil, the results calculated from "C" method are consistent with the measured value better than that form "m" method.
Keywords: retaining structure; multistorey bracing; staged excavation; "C" method