砂井是加固软土地基的有效方法。但过去多采用钢管法施工,由于设备笨重,井深受设备限制,故砂井法的采用和推广受很大影响。遵照伟大领袖毛主席“自力更生,艰苦奋斗”的教导,1966年在阳新,为解决大沙线跨过4公里的湖区,提出了射水砂井法施工方案。在资料缺乏和设备不全的情况下,用毛泽东思想武装起来的中国工人阶级,敢于创新,敢于实践, Sand wells are an effective way to reinforce soft ground. However, the steel pipe method was used in many constructions in the past. Due to heavy equipment and wells being limited by equipment, the adoption and promotion of the sand well method was greatly affected. In accordance with the guidance of the great leader Chairman Mao “self-reliance and hard work”, in 1966 in Yangxin, a water-draining sand well method was proposed to solve the Dasha line across the 4km lake area. In the absence of data and incomplete equipment, the Chinese working class, armed with Mao Tse-tung’s thought, dared to innovate and dare to practice.