复合载体夯扩桩在南水北调工程中的应用

Application of Ram-Compaction Piles with Composite Bearing Base in the South Water to North Transfer Engineering

复合载体夯扩桩是利用单桩承载力高,桩身较短的特性,通过提高复合地基置换率参数的方法有效提高复合地基的承载力,减小上部土体中的有效应力,从而有效减少土体的压缩变形。南水北调中线某公路桥工程,地基为砂土层,承载力低,拟采用复合载体夯扩桩进行地基处理。文中给出了夯扩桩的详细设计及验算过程,对同类工程的设计具有较大的参考意义。

Ram-compaction piles with composite bearing base is an effective method to enhance the bearing force of the composite foundation, by using the high bearing force of a pile, the characteristic of the pile＇s short, the enhance of the substitute ratio of the composite foundation. It can decrease the effective stress of upper ground, and then decrease the compress value of the ground. In the South Water to North engineering, there is a highway bridge with sand foundation and low bearing force. Ram-compaction piles with composite bearing base is planed to be adopted. In this paper, the detailed process of design and checking is detailed. A certain reference can be given to the similar engineering.