- 摘 要
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李應?！?nbsp;（上海林同炎李國豪土建工程咨詢有限公司 200093）
[提要] 提出一種摩擦端承樁復合樁基設計方法，即在剪力墻或柱下集中布樁，樁頂與筏板（或承臺）間設置一定厚度的軟墊或專用變形器。通過迫使樁間土先于樁項發(fā)生沉降使其承擔預定的荷載，隨后增加的荷載則由樁、土共同承擔。該法可充分發(fā)揮地基土的承載力，大幅度減少用樁量和筏板厚度及配筋，其經濟效益明顯優(yōu)于常規(guī)樁基和復合地基。對其承載機理和變形特性進行了初步研究，得出了承載力和沉降近似計算公式，并成功應用于工程實踐，取得了很好的經濟效益。
[關鍵詞] 摩擦端承樁 復合樁基 軟墊 專用變形器 承載力 沉降A design method has been put forward for composite pile foundation of friction and end-bearing piles that piles are located only under shear wall or column, and the cushion with thickness or special deforming device is installed between pile block and raft( or cushion cap). The soil between piles is settled earlier than pile block and carried the preload,after that the increasing load has been carried by piles and soil. It can make full use of foundation soil's bearing capacity, largely reduce the number of demanding piles,thickness of raft and distributed steels. Through elementary studies on the load-bearing mechanic and deforming characteristic of the composite foundation,we generalized the approximate formulas of bearing capacity and settlement,which has been successfully used in engineering practice.
Keywords: frication&end-bearing piles; composite pile foundation; cushion; special deforming device; bearing capacity; settlement;design
參 考 文 獻
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