振動沖擊沉管灌注全復(fù)打嵌擴樁在砂卵石地基上的應(yīng)用探討
雍興友 陳建平
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雍興友 （南充力匯建設(shè)集團公司 南充 637000）陳建平 （西南石油學(xué)院設(shè)計研究院）
[提要] 通過實踐，提出了適應(yīng)在河流沖積階地砂卵石地基上的振動沖擊沉管灌注全復(fù)打嵌擴樁工藝，簡要介紹工藝流程及作用原理，對三個工程試樁進行分析，并對單樁承載力進行探討，推薦其承載力計算公式，供有關(guān)設(shè)計施工技術(shù)人員參考。
[關(guān)鍵詞] 砂卵石地基 全復(fù)打嵌擴樁 摩擦端承樁 重復(fù)擠壓 回彈量 殘余變形According to construction experience, this paper introduce the techniques of the vibro-percussion, pipesinking and double-poured piles embedded expansion on the sand-pebble alluvial terrace. Then the technological process and working principles are given. The bearing capacity of a single pile by analyzing three experiment piles on the construction spots are also discussed, and a calculation formula of the bearing capacity is presented for reference.
Keywords: sand-pebble ground; double-poured pile; repeated extruding; friction end-bearing pile
