發(fā)布時間：2018-07-12 09:38

  本文選題：預應力混凝土竹節(jié)樁 + 靜載試驗��； 參考：《合肥工業(yè)大學學報(自然科學版)》2016年10期

【摘要】：預應力混凝土竹節(jié)樁(簡稱"竹節(jié)樁")是在普通預應力混凝土管樁(簡稱"管樁")基礎上改良而來的新樁型。文章介紹了竹節(jié)樁的構造和接樁技術,并通過現(xiàn)場靜載試驗,對竹節(jié)樁在軟土地基中的承載性能進行了對比研究。試驗表明:竹節(jié)樁的單樁豎向抗壓極限承載力與管樁和預應力混凝土空心方樁(簡稱"方樁")相比,均能提高20%左右,單樁豎向抗拔極限承載力比管樁提高60%以上。竹節(jié)樁由于設置了環(huán)向、縱向凸肋,改變了樁-土接觸方式和樁身粗糙度,有利于樁側摩阻力的充分發(fā)揮。在荷載水平較低時,樁頂位移曲線近似為直線,當荷載增加到一定程度時,會在土體中形成一個直徑與環(huán)向凸肋大小相當?shù)膱A筒形剪切滑動面。
[Abstract]:Prestressed concrete slub pile (abbreviated as "bamboo section pile") is a new type of pile which is improved on the basis of ordinary prestressed concrete pipe pile (abbreviated as "pipe pile"). This paper introduces the structure of bamboo section pile and the technology of connecting pile, and through the static load test on the spot, the bearing capacity of bamboo section pile in soft soil foundation is compared and studied. The test results show that the ultimate bearing capacity of single pile under vertical compression is about 20% higher than that of pipe pile and prestressed concrete hollow square pile ("square pile"), and the ultimate bearing capacity of single pile is more than 60% higher than that of pipe pile. Due to the setting of circumferential and longitudinal rib, the contact mode of pile and soil and the roughness of pile body are changed, which is beneficial to give full play to the friction of pile side. When the load level is low, the displacement curve of pile top is approximately straight line. When the load increases to a certain extent, a cylindrical shear slip surface with a diameter equal to the size of a circumferential convex rib will be formed in the soil.
【作者單位】： 合肥工業(yè)大學資源與環(huán)境工程學院;浙江天海管樁有限公司;
【基金】：合肥工業(yè)大學產(chǎn)學研校企合作資助項目(W2014JSFW0415)
【分類號】：TU473.11

【參考文獻】

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本文編號：2116732