掺土粉煤灰在坝基路基中的特性研究

Research on the Characteristic of Clay-Added Flay Ash in Dam Foundation and Roadbed

粉煤灰是火电厂燃煤的副产品,如何处理利用粉煤灰是国内外十分关注的问题。目前解决这一问题的途径很多,利用粉煤灰作为坝基、路基等填筑材料是比较有效的消纳方法。粉煤灰在许多方面具有比较优越的工程性能,但因为纯粉煤灰缺少必要的粘聚力,在动力作用下易发生动强度急剧降低并产生液化现象,从而对工程的安全运行造成不利影响。在粉煤灰中掺合不同量的黏土有望改善粉煤灰的工程性能。

Fly ash is a by-product of coal-fired power plant. How to deal with and make use of fly ash is a concerned problem both at home and abroad. At present, there are many ways to solve this problem, among which using fly ash as dam foundation and roadbed filling materials is an effective method. Fly ash has many perfect engineering properties in many aspects. But the pure fly ash is lack of necessary cohesion and easily loses dynamic strength and shows a liquefaction phenomenon under dynamic force. Thus, pure fly ash will bring adverse effect to the project's safe operation. Adding different amounts of clay is expected to improve the engineering properties of fly ash.