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    徐至鈞    （北京恒富房地產(chǎn)開發(fā)有限公司  100055） 

    張曉玲    （北京俊華地基基礎(chǔ)工程技術(shù)集團(tuán)  100084）

[提要]  擠擴(kuò)支盤樁可根據(jù)不同土層擠擴(kuò)多節(jié)支或盤，能大幅度提高樁的承載能力。從擠擴(kuò)支盤樁成型的基本原理、樁的組成、擠擴(kuò)裝置、樁的作用機(jī)理、單樁豎向承載力計(jì)算的經(jīng)驗(yàn)公式及其與靜荷載試驗(yàn)對(duì)比等，全面介紹了擠擴(kuò)支盤樁的工程實(shí)踐和應(yīng)用。
[關(guān)鍵詞]  擠擴(kuò)  支盤  灌注樁  單樁承載力

Extruding-expanding multi-brace-disk pile is a new type of pile. Its bearing capacity can be greatly enhanced after extruding and expanding multi-braces and disks according to different soil. This paper gives an overall introduction of the application of the piles in the project construction from its principle of working,structure of the pile, extruding and expanding devices and calculation formula of bearing capacity. The results of loading tests of some practice projects are compared with the calculating values.
Keywords: extruding-expanding multi-brace-disk pile; bored concrete pile; bearing capacity