本文選題：堆載　切入點(diǎn)：樁頂荷載　出處：《中南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年01期

【摘要】：樁側(cè)負(fù)摩阻力是影響樁基工作性能的重要因素,而堆載和樁頂荷載對(duì)樁側(cè)摩阻力的分布影響很大,為了研究其組合作用機(jī)理,采用拉格朗日差分法分析堆載和樁頂荷載組合作用下樁側(cè)摩阻力分布、中性點(diǎn)位置變化規(guī)律以及樁體軸力分布。研究結(jié)果表明:負(fù)摩阻力主要出現(xiàn)在0.37~0.64倍樁長位置;當(dāng)堆載小于或等于60 k Pa時(shí),負(fù)摩阻力沿樁身向下先增大后減小并逐漸過渡到正摩阻力;當(dāng)堆載大于60 k Pa時(shí),負(fù)摩阻力沿樁身向下逐漸減小然后過渡到正摩阻力;樁體最大軸應(yīng)力與堆載和樁頂荷載具有明顯的二元線性相關(guān)性;中性點(diǎn)位置變化規(guī)律受樁頂荷載和堆載組合值的影響,根據(jù)此規(guī)律得出二元方程式,可用于快速估算中性點(diǎn)的位置。
[Abstract]:The negative frictional resistance of the pile side is an important factor affecting the working performance of the pile foundation, while the pile load and the pile top load have a great influence on the distribution of the pile side friction. The Lagrangian difference method is used to analyze the lateral friction distribution of pile under the combination of pile load and pile top load, the variation law of neutral point position and the axial force distribution of pile body. The results show that the negative frictional resistance mainly occurs in the position of 0.37 ~ 0.64 times the length of pile. When the heaped load is less than or equal to 60 KPA, the negative frictional resistance increases first and then decreases along the pile body and then decreases to the positive frictional resistance gradually, and when the heaped load is greater than 60 KPA, the negative frictional resistance decreases gradually along the pile body and then to the positive friction resistance. The maximum axial stress of pile body has obvious binary linear correlation with pile load and pile top load, and the variation law of neutral point position is affected by pile top load and pile load combination value, according to which the binary equation is obtained. It can be used to estimate the position of neutral point quickly.
【作者單位】： 中南大學(xué)資源與安全工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51274249) 教育部博士點(diǎn)基金資助項(xiàng)目(20120162110009)~~
【分類號(hào)】：TU473.1;TU435

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本文編號(hào)：1665714