DETERMINE OF THE PILE END BEARING CAPACITY EIGENVALUE OF THE COMPOUND CARRIER TAMPING EXTENDED PILE IN MIDDLE, COARSE AND GRAVEL SAND STRATUM

The tamping extended pile is wildly used in silt and fine sand area, and obvious experiences has been gained in practice. But this technique is seldom used in middle, coarse and gravel sand stratum, and not mentioned in rules. So in the procedure of design and construction of the specific engineering, engineering geological analogism is used to estimate roughly. According to the comparison and statistic analysis of the tamping extended pile data in the middle, coarse and gravel sand stratum, significant conclusion has been obtained in this paper.