打桩对砂砾层地基影响的探讨

AN APPROACH TO THE EFFECT OF PILING ON THE FOUNDATION OF SAND AND ROUND GRAVEL

本文通过对柱基群桩周围和桩尖下土层的勘探,及对最短的桩做单桩垂直静载荷试验进行的理论分析,说明打桩之后,由于砂、圆砾层土壤被加密,提高了桩周摩阻力和桩尖阻力,桩基承载力及其沉降量仍能满足设计要求。

Through the prospecting for the soil-layers around groups of piles and below ends of these piles,and by means of the test for the vertically compressional static load of the shortest single pile, the theo-retical analysis is conducted in this paper, it indicates that the forces of skin-friction andpoint-resistance of the pile are increased because the density of sand and round gravel is raised bypiling. The bearing capacity and subsiding value of pile foundations can satisfy the design requirement.