一、前言1.概说挤实砂桩是用简单的机械,通过振动或冲击荷载,把砂挤入软土中,形成较大直径的砂桩,使地基加固。这种方法在砂土或粘土中均可应用。对于松砂,是靠振动和冲击挤入作用使地基压密,相对密度增加。对于软粘土主要是密实的砂桩和软粘土形成复合地基,从而提高地基的整体稳定性。其加固效果,列举如下: I. Preface 1. It is stated that the compacted sand pile is a simple machine that, through vibration or shock loading, squeezes the sand into soft soil to form a sand pile with a larger diameter and reinforces the foundation. This method can be applied in sand or clay. For loose sand, the foundation is compacted by the action of vibration and impact and the relative density increases. The soft clay is mainly composed of dense sand piles and soft clay to form a composite foundation, thereby improving the overall stability of the foundation. The reinforcement effect is listed as follows: