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在无法实施大面积混凝土干地施工的情况下 ,可以采用水下混凝土群管施工。此法不同于单管灌注施工 ,它不仅要确定合理的导管间距 ,而且要求混凝土的浇筑能力 ,能够满足群管灌注对水下混凝土拌合物流动性的保持指标 ,使水下混凝土拌合物在水下有良好接触。所以应在事前作好灌注施工方案的论证 ,实施时要精心组织 ,合理安排 ,才能保证灌注的顺利进行。
In the case of large-area concrete dry construction can not be implemented, the construction of underwater concrete sub-group can be used. This method is different from the single-tube perfusion construction, which not only to determine a reasonable conduit spacing, but also requires the pouring capacity of concrete to meet the group of pipe pouring on the fluidity of underwater concrete mix retention indicators so that underwater concrete mix Have good contact under water. Therefore, perfusion should be prepared in advance of the demonstration program, the implementation of the organization should be carefully and reasonably arranged to ensure the smooth progress perfusion.