在密实、饱和的砂类土地基上进行桩基础施工,往往在打入桩或沉管的入土深度不大时就过早地出现贯入度很小、甚至为零的情况,使得成桩深度达不到设计的要求。近年来,我们针对银川新市区一带砂类土地基上成桩困难的问题,试验研究成功“射水振动沉管灌注桩施工工艺”,这种施工方法是灌注桩的一种新工艺,它适用于密实度较大的饱和砂类土地基。施工容易,配套设备简单,较一般 Construction of pile foundations on compacted, saturated sand-type soil foundations often results in premature penetration of very small, or even zero, piling depths when injecting piles or immersed pipes with little depth of soil. Can not reach the design requirements. In recent years, we have been experimenting with the success of the “water jet vibratory immersed cast-in-place pile construction technology” for the problem of the difficulty of pile formation on sand foundations in the new urban area of ​​Yinchuan. This construction method is a new process for cast-in-place piles and it is applicable. For the more compact saturated sand ground. Construction is easy, supporting equipment is simple, more general