膨胀土中桩的计算

The Calculation of Piles in Swelling Soil

桩在膨胀土中所受到的胀切力是由膨胀强度引起的,膨胀强度函数的推导问题,本文提出用比拟的方法,即受热时,坚固物体膨胀是与受潮时土上升的增加量相同,与增湿相关的张力是沿桩侧面分布的。因此求胀切力问题就转化为热弹性理论偏微分方程的积分与定解问题。再结合桩的阻滞原理,求得膨胀强度的函数式,桩的上升量和桩的有效胀切总力的理论计算公式,与实验结果对照,表明计算值与实际情况符合得很好。

The imposed swelling shear of pile in swelling soil is due to the swelling stength.To deduce the function of swelling strength, the method of analogy is presented ,in which the swelling of solid object when heated is similar to the rising increment of soil when weted.The tension related to the increasing wet is on the surfaceof the pile.Thus the problem to find the selling shear is converted to the problem of integration and foxed solution to the differential epuation on thermo -elastic theory.Using the damping theory of pile, the function formula of swelling strength and the theorial calculating formula of rising volume and total effective sweeling shear of Ipile ,the calulating results are conformed to the experimental ones.