焊接密闭钢模注浆加固技术探索与应用

采用增大截面法加固混凝土梁、混凝土柱的过程中,当所需增加的截面尺寸较小时,常遇到混凝土中的粗骨料难以进入原构件与模板间隙、混凝土难以浇筑密实及振捣困难等问题．为此,提出了一种先在原构件外绑扎钢筋,再在外围设置焊接密闭钢模,最后灌注水泥基灌浆料的加固技术,称之为焊接密闭钢模注浆加固技术．这种加固技术的特点在于用水泥基灌浆料替代常规混凝土,用密闭钢模替代传统的模板．本文通过工程实例介绍了焊接密闭钢模注浆加固技术,工程应用情况表明这种新型加固技术施工简便,节省工期,加固效果良好,具有广泛的适用性,可在混凝土结构的加固中推广．

Exploration and application of strengthening technology by grouting in the welding closed steel template

When the area of concrete beams and concrete columns strengthened by the method of enlarging the cross section is small, the coarse aggregate is usually hard to be injected the strengthening area and the concrete is also difficult to be vibrated. Thus, a new strengthening technology named strengthening technology by grouting in the welding closed steel template is proposed in this paper, which firstly assembles the steel outside the original components, secondly sets the steel templates and lastly pours the cement based grouting material. This strengthening technology is characterized by using the cement based grouting material and welding closed steel template to replace the traditional concrete and traditional templates. It has already been applied in two applications which are presented in this paper, and the result shows that it can be easily applied in the structural applications, and it can save construction time considerably, and make the construction process more convenient.