大直徑鉆孔灌注長樁的靜載試驗研究*
趙順波 劉愛軍 耿六成
- 摘 要
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趙順波 （華北水利水電學院土木系 鄭州 450045）劉愛軍 耿六成 （河北省水利廳 石家莊 050011）
[提要] 介紹直徑為l.0m，長度為68.03m的鉆孔灌注試驗樁的靜載測試試驗，對荷載 沉降量曲線、樁身軸心壓力沿深度的分布規(guī)律、樁側摩阻力與樁土相對位移關系以及樁端反力等進行了計算分析，給出了主要受力土層的單位極限摩阻力建議值和試驗樁的極限承載力建議值。
[關鍵詞] 鉆孔灌注樁 靜載試驗 樁側摩阻力 極限承載力
It is introduced that the static load test method of a bored cast-in-situ pile with l.0m of diameter and 68.03m of length tested in the highway bridge project from Jiaozuo to Gongyi across the Yellow River. The relationship of load to subside, the distribution of centric compressed force along pile depth, the relationship of friction force around pile to relative displacement between pile and soil, and the end active force of pile are analyzed. The unit ultimate friction force of the main layer of soil and the ultimate bearing capacity of the test pile are proposed.
Keywords: bored cast-in-situ pile; static load test; friction force around pile; ultimate bearing capacity
