振动沉管灌注桩施工过程中，桩身混凝土进水是常见的问题。其产生原因主要有以下４点：（１）桩尖活瓣关闭不严，缝隙过大；（２）第一次加料时间未掌握好；（３）开动桩锤时间过早；（４）拔管速度太快，桩管内混凝土量少。针对上述原因，我单位在施工中采取以下预防措施，取 Vibration sinking pipe filling pile construction process, pile concrete water is a common problem. The main causes of the following four points: (1) the tip of the valve closed lax, gap is too large; (2) the first feeding time is not good; (3) start premature pile hammer too early; Tube speed is too fast, less concrete pile tube. For the above reasons, my unit in the construction of the following preventive measures taken