焊接密闭钢模注浆加固技术探索与应用

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

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.

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 origi- nal 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 applica- tions which are presented in this paper, and the result shows that it can be easily applied in the structural appli- cations, and it can save construction time considerably, and make the construction process more convenient.