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一、堵管产生的危害发生堵管事故后,处理不当,不拔管进行第二次灌注,而在这一过程中,原灌入的混凝土逐渐进入初凝,第二次灌注有可能在新老混凝土之间形成一断面,即造成“断桩”,使桩体质量下降。另外堵管后处理和拔管时间过长,往往混凝土在导管的堵塞部位凝固,难以清除掉,最后?
First, the dangers of plugging tube Accident after the plugging tube, improper handling, do not extubation for the second perfusion, and in the process, the original pouring of concrete gradually into the initial setting, the second perfusion may be in the new The formation of a cross-section between the old concrete, which resulted in “broken pile” so that the quality of the pile. In addition, post-processing and extubation tube plugging too long, often in the catheter blockage of concrete coagulation, it is difficult to remove the last?