STUDY ON THE FINITE DIFFERENCE METHOD IN CALCULATION OF INTERNAL FORCES OF PRESTRESS-ANCHORED ANTISLIDE PILES
预应力锚固抗滑桩内力计算有限差分法研究

The disadvantages of existing calculation methods for the internal forces of the prestress-anchored antislide pile are pointed out. Based on the principle of the foundation coefficient method in calculating the internal forces of the ordinary antislide pile,the finite difference method is presented to calculate the internal forces of the whole prestress-anchored antislide pile. The corresponding formulae are derived in detail. The pile can be analyzed as a complete entity. It is not necessary to divide the pile into two segments by the sliding surface like the existing methods. The ordinary antislide pile and the prestress-anchored pile are compared by an engineering example. The advantages are showed of the prestress-anchored pile. Meanwhile the example also shows that the finite difference method can obtain the calculation results quickly and precisely and model all sorts of working cases of the pile. Therefore this is a simple and useful method in analyzing the internal forces of the prestress-anchored antislide pile. Monitoring work shows the calculation results are satisfying.