摘要
近年来塑性混凝土防渗墙在国内水利水电工程中已经得到广泛应用,由于其厚度较薄(一般为0.3～0.8 m),加之其物质组成相对普通混凝土具有较大变化,其质量检测一直是个难点。近年尝试利用工程物探检测技术中的探地雷达、高密度电法和弹性波层析成像技术做了一些有益的生产试验工作,取得了较为可喜的研究成果。针对塑性混凝土防渗墙的具体特点,借助探地雷达的高频特性揭示了塑性混凝土防渗墙不同质量缺陷(夹泥裂缝、夹泥洞、胶结不良)的雷达图像特征,经开挖验证基本符合实际情况。从而为塑性混凝土防渗墙的验收评价及其加固处理提供了科学依据。
Plastic concrete cut-off wall has been widely used in water conservancy and hydropower projects in China.However,compared to ordinary concrete,the plastic concrete is relatively thin(usually 0.3-0.8 m),and has large change in material composition,its quality detection is always a difficulty.In recent years,people have made some beneficial production tests by applying ground penetrating radar,high density electrical method and elastic wave tomography technique in the engineering geophysical detection technology and achieved gratifying research results.The test shows the radar image features in different quality defects(mud cracks,mud holes,poorly cemented) of plastic concrete cutoff wall by means of the high frequency characteristics of ground penetrating radar and proves to be basically consistent with the actual conditions by excavation verification,thus provides a scientific basis for acceptance evaluation and reinforcement treatment of plastic concrete cutoff wall.
出处
《水利水电工程设计》
2013年第2期42-45,56,共4页
Design of Water Resources & Hydroelectric Engineering
关键词
无损探测
探地雷达
塑性混凝土
防渗墙
夹泥裂缝
夹泥洞
胶结不良
non-destructive detection,ground penetrating radar,plastic concrete,cut-off wall,mud crack,mud hole,poorly cemented
