强夯垫层作用及其相关因素——以浦东机场场道工程地基强夯处理为例

在大型强夯试验研究的基础上,指出强夯处理中垫层虽具有防止粘锤现象和抑制表面振动波的松动作用的优点,但它毕竟要消耗一部分夯击能,这是它的负作用,消耗夯击能的大小主要与其级配相关。级配较好的垫层消耗夯击能较小,反之,消耗夯击能则较大。因此,在采用垫层的强夯处理中,必须要考虑垫层的级配情况,否则将浪费较大的夯击能或使地基处理失败。

THE STUDY ON THE EFFECTS OF CUSHION FOR DC AND ITS INTERACTION ELEMENTS

The effect on DC's dealing with foundation causes very great reaction in internal and abroad engineering boundary, but the design for DC and the knowledge of DC treatment are not mature, the one hand is poorly study on cushion for DC. In this paper, the study result by senior have been summarized, on the basis of the large study test of DC, it has been pointed out that cushion is able to prevent hammer and soil form being stick together and restrain the loose action of surface wave, but it has bad action which will consume some tamping energy. The quantity of consumed tamping energy is controlled by composition of cushion. The better composition, the smaller the quantity of consumed tamping energy. So, taking cushion for DC treatment, the composition of cushion must be examined, or, the large quantity of the energy will be consumed, even foundation treatment will be fail.