振孔高压摆喷技术在堤防加固中的应用

Study on Methods of Anti-Seepage and Reinforcement of Embankments

目前,高压摆喷防渗板墙技术已广泛应用于堤防加固、水库防渗、基础处理等领域。高压水、压缩空气、水泥浆及提升速度、摆角等是施工质量控制的主要参数。其墙体设计指标要求渗透系数小于1×10-6cm/s,且抗压强度大于2.0MPa。按照指定工序和相关技术要求施工完毕后,还须对墙体的连续性和抗渗性进行检测。台前县黄河大堤段的堤脚截渗墙工程中采用了该技术,经检验证明,其各项技术指标均达到设计要求,取得了较好的防渗效果。

Osmotic damage is a common dangerous condition for embankments. In order to get rid of the dangerous condition of osmotic damage and reinforce embankments, we should understand the types of osmotic damage, compare the plans for reinforcement and find out economic and rational measures. The paper mainly discusses to prevent seepage of embankment by methods of clay inclined wall, compound geomembrane, slope drainage, anti-saturation berm and splitting grouting and to prevent seepage of dyke foundation by methods of adding concrete apron, curtain grouting, drainage well, decompression ditch, geomembrane and vertical impervious core. It puts forward that the determination of anti-seepage methods depends on the factors of soil texture, quality of filling, geologic characteristic of dyke earth mass and geographic environment of embankment surroundings. It should be rechecked by seepage calculation if necessary.