目前国内外采用排水砂井处理软土地基已很广泛,也很有成效。在砂井施工的工艺方面也不断地改进和发展。目前常用的打砂井方法有打入法(即用打桩机打入带有活瓣桩尖的空心钢管桩)和射水法(即高压水冲法),由于射水法具有机具简单、施工方便、打孔速度快等优点,因此被广泛采用。但目前国内射水法砂井施工只限于陆上,对海上射水法砂井施工 At present, the use of drainage sand wells at home and abroad to deal with soft ground has been very extensive, but also very effective. In the sand well construction process also continues to improve and develop. At present, the commonly used method of sand drilling well is penetration method (that is, using a pile driver to drive a hollow steel pipe pile with a valve tip) and a water jet method (that is, a high-pressure water jet method). Since the water jet method has the advantages of simple equipment and convenient construction , Drilling speed advantages, it is widely used. However, at present, the construction of the domestic water method sand well is limited to land use, and the construction of the water jet sand method at sea is carried out