1.前言临时工程或基础工程,当地基N值大于50的硬土基或岩基上需用打桩的场合极多,最近作为软地基的改良施工法,采用水泥材料修筑无侧限抗压强度为10kg/cm~2的加固地基。“射水沉桩施工法”不可能仅用桩锤打入像这样的岩基或加固地基,应配合使用振动打桩机和射水法进行钻孔作业,故也可叫做钢桩直接浇筑岩基打桩施工法。下图为射水沉桩施工法的原理 2.本施工法的原理与特点 1. Introduction Temporary or basic engineering, the foundation of the N value greater than 50 hard foundation or rock foundations need to use a lot of piling, and recently as a soft ground improvement method of construction, the use of cementitious materials to build unconfined compressive strength For the reinforcement of 10kg / cm ~ 2 foundation. It is impossible to use the pile hammer only to penetrate such rock foundation or reinforced foundation, and should use the vibration pile driver and water jetting method to drill holes. Therefore, it can also be called as the direct pouring of steel pile by rock foundation piling law. Shown below is the principle of the method of water-immersed pile construction 2. The principle and characteristics of the construction method