水下钻孔灌注桩在设计及施工中被大量采用,但其大部分在水下进行施工,成桩后验收难度较大,必须在施工过程中掌握良好的技术,做好质量控制。施工时,首先要做好护筒安放及钻机就位工作,钻孔时采用泥浆护壁,控制好泥浆的比重;灌注水下混凝土应注意导管距孔底的距离,导管在混凝土中的埋深等;在做好灌注的同时要控制好混凝土的拌和质量等,这样才能切实保证工程施工质量。 Underwater bored piles are widely used in the design and construction, but most of them are under water for construction. After being piled, it is very difficult to be accepted and accepted. Good technology and good quality control must be mastered during construction. Construction, the first place to do well casing and drilling rig in place, drilling mud retaining wall used to control the proportion of mud; perfusion of underwater concrete should pay attention to the catheter from the bottom of the hole, the depth of the catheter in the concrete ; In good perfusion at the same time to control the mixing of concrete quality, etc., in order to effectively ensure the quality of construction.