就目前而言,在用导管垂直灌注钻孔桩水下混凝土施工工艺中,砍球（隔水栓）仍是必不可少的重要环节,所以,完善砍球技术,改善球体质量,已是基础工程施工的技术人员所关注并急待解决的问题。笔者经过多次试验,制作出一种新的隔水栓,实用结果表明,这种隔水栓可以克服容易被卡住和不易回收等弊端,使用效果甚好。现介绍如下: 制作这种隔水栓的材料,就是待灌基桩的 So far, it is still an indispensable part to cut down the ball (water blocking bolt) in the construction process of vertically perforating a bored pile with underwater concrete by a pipe. Therefore, improving the ball-cutting technique and improving the ball quality has been the foundation Engineering construction workers are concerned about and urgently need to solve the problem. After several tests, the author made a new type of water stop bolt, and the practical results show that the stop bolt can overcome the defects of easy to be stuck and not easy to be recycled, and the use effect is very good. Now introduced as follows: The production of such bolt material, is to be filled piles