堤防水泥土防渗墙技术

Technology of cement soil cutoff wall of embankment

为了解决堤防工程中的防渗问题,尤其自1998年我国的特大洪灾之后,水泥土防渗墙施工技术即在堤防加固工程中得到了广泛的应用。主要介绍了水泥土防渗墙的基本概念以及其在长江中下游堤防中的应用情况;分析了长江中下游的地质条件,并据此研究和对比了防渗墙渗透系数对渗透效果的影响;提出了防渗墙渗透系数在10-6 cm/s量级、厚度不小于0.2 m是合适的结论。以其对今后的堤防防渗工程和设计会有所帮助。

To resolve the problem of the anti-seepage during the dike project,the construction technology of cement soil cutoff wall is widely applied to the embankment reinforcement project and it’s especially used when the catastrophic flood occurred in china in 1998.Both the concepts of cement soil cutoff wall and the application of it to the embankment of the lower Yangtze region are introduced.The geological condition of the lower Yangtze region was analyzed,and the influence of the cut-off wall’s permeability on penetration effect was studied.According to the analysis,it is concluded that the appropriate design of cut-off wall is permeability in an order of magnitude of 10 cm/s and the thickness is not less than 0.2 m.The research results are helpful to the construction and design of dike anti-seepage project in future.