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(福建省建筑設(shè)計(jì)研究院，福州 350001)

［摘要］算例表明，《建筑樁基技術(shù)規(guī)范》(JGJ94—94)式5112計(jì)算偏心豎向力作用下群樁中各樁豎向力僅對(duì)樁群坐標(biāo)軸為形心主軸時(shí)成立。在規(guī)范修訂中對(duì)于該公式的應(yīng)用條件應(yīng)加以說明和限制。利用材料力學(xué)的研究方法，給出了應(yīng)用該規(guī)范公式的正確計(jì)算步驟。同時(shí)給出了適用于任意樁群形心軸的廣義樁反力公式。

［關(guān)鍵詞］多樁承臺(tái)；形心主軸；廣義樁反力公式

Research on counterforce of grouped piles under eccentric compression

 Ren Yu

 (Fujian Architecture Design & Research Institution, Fuzhou 350001, China)

Abstract:The results of pilot calculation show that the formula 5.1.1-2 of  Technical Code for Building Pile Foundations(JGJ94—94) comes into existence just when the calculational coordinates are set to the principal axis through centroid. It is appropriate to edit the text about the formula 5.1.1-2 of JGJ94—94. Using the method of mechanics of material, the correct calculation procedures about formula 5.1.1-2 are suggested. And then, the generalized formula of counterforce of grouped piles is given, which can be used for any coordinates through centroid.

Keywords:grouped piles cap; principal axis through centroid; generalized formula of counterforce of grouped piles