检测混凝土防渗墙质量的常用方法及应用

Common methods and application of quality detection for concrete cutoff wall

通过对跨孔声波、单孔声波、声波CT成像、钻孔全景图像等检测方法进行分析,总结整理了防渗墙典型质量缺陷的地球物理特征,提出快速、实用、经济地对防渗墙质量进行检测的方案。根据防渗墙的规模和重要性程度,检测断面最好能形成一个完整的检测剖面。在其检测剖面上,首先采用跨孔穿透声波进行普查,然后在异常区域布置声波CT成像进行定位,最后布置适量的取芯孔进行单孔声波、钻孔全景图像、钻孔压(注)水试验验证。

Common methods of quality detection for concrete cutoff wall are analyzed in this paper,suchas cross-hole sonic,single-hole sonic,sonic CT imaging,panoramic drilling image and so on.Based onsummarizing the geophysical characteristics of typical defects of cutoff wall,a fast,practical and econom-ical scheme to detect the quality of cutoff wall is put forward.Combined with the size and importance ofthe cutoff wall,it is preferred to form a complete detection section.In the detection section,cross-holesonic is firstly used as a general survey.And then sonic CT imaging is carried out in the abnormal areato locate the defect.Finally,to verify the detection results,an appropriate amount of core holes are ar-ranged to carry out single-hole sonic,panoramic drilling image and pressurized-water test.