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目前关于振捣深度对模板侧压力影响的研究还很少,各国标准中关于振捣深度及超深振捣模板侧压力的规定也存在较大差异。为此,设计了5个60 cm×60 cm×300 cm柱体试件和2个30 cm×120 cm×300 cm墙体试件,研究了振捣深度和二次超深振捣对模板侧压力的影响,提出了混凝土超深振捣的定义。研究表明:振捣深度或二次超深振捣对模板侧压力有较大影响,超深振捣会大幅度增加混凝土对模板的侧压力,对模板工程的安全造成不利影响。但超深振捣位置处的模板侧压力并不随振捣深度的增加而线性增加,其值明显小于将混凝土视为纯液体计算得到的压力值。
At present, there is little research on the influence of vibrating depth on the pressure on the template side. There are also big differences in the national standards regarding the depth of vibrating and the pressure on the side of ultra-deep vibrating template. For this purpose, five specimens of 60 cm × 60 cm × 300 cm column and two specimens of 30 cm × 120 cm × 300 cm were designed. The effects of vibrating depth and secondary ultra-deep vibrating on the template side Pressure, the definition of ultra-deep vibrating concrete is put forward. The results show that the vibrating depth or the second ultra-deep vibrating has a great influence on the pressure on the side of the formwork. The ultra-deep vibrating will greatly increase the lateral pressure of the concrete on the formwork and adversely affect the safety of the formwork. However, the pressure at the template side in the ultra-deep vibrating position does not increase linearly with the increase of vibrating depth, which is obviously lower than the calculated pressure value when the concrete is regarded as a pure liquid.