膨胀土中桩的胀切力计算研究

桩在膨胀土中所受到的胀切力是由土的膨胀引起的，其膨胀强度只决定胀切力的大小，本文提出用比拟的方法，即受热时，坚固物体膨胀与受潮时土上升的增加量有较相近可比之处．增湿相关的胀力是沿桩侧面分布的，这样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，从而确定膨胀强度的函数式，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，计算结果与实际情况符合得较好。

Study on the sweling shear of the calculation of piles in swelling soil

The imposed swelling shear of pile in swelling soil is caused by the swelling. 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 getting wet. The tension related to the increasing wet is on the surface of 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. The function formula of swelling strength and the theoretical calcualting formula of rising volume and total effective sweling shear of the pile are presented, and the calulating results are conformed to the experimental ones.