PS表面防风化工艺研究

为研究大型露天遗址的防风化问题,经总结二十多年来PS大规模应用于土遗址保护的经验,逐步形成了一套行之有效的表面防风化工艺。该工艺包括表面喷洒渗透和常压滴渗,两者可单独使用也可联合使用。表面喷洒渗透采用直接向墙体喷洒PS溶液的方式加固,适用于风化层较薄、自身强度较高的墙体;常压滴渗需要在墙面上开孔,将PS溶液通过细胶管或小号针头缓慢滴入土体,以起到更好的加固效果,主要适用于风化层较厚、强度较低的墙体。PS加固以后土遗址颜色稍有变化,采用作旧的方式保持土遗址原来的观感。大量工程实例和后期检测都证明该工艺具有良好的加固效果,可以推广应用。

Study on the use of PS treatment for surface antiefflorescence in earthen sites

The use of PS for anti-efflorescence treatment of large-scale earth sites during the past twenty years is summarized.PS treatment has been found to be an effective technique.The technique includes surface spraying infiltration and trickle infiltration.These two methods can be applied together or separately.Surface spraying infiltration involves spraying of a PS solution directly on the wall,which applies the solution to the thin weathered layer in the walls of adequate strength.Trickle infiltration is accomplished by drilling small holes in the wall and injecting the PS solution by means of a small rubber tube or syringe needle.This method is suitable for walls with thick weathered layers and low strength.After PS treatment,the enhanced wall changes color slightly.The color can be restored to get the original look.A number of previous examples and follow-up examinations have proved the technique to be effective and worthy of applying in other projects.