铁道部十五局一处在处理侯马北站列检楼地基下沉时，使用碱灰混合法加固地基，获得成功。该法是将氢氧化钠溶液灌入土中，使之与黄土中大量的镁、钙等可溶交换性碱性金属阳离子发生转换反应，生成的氢氧化物附在土粒表面。与此同时，氢氧化钠溶液会使土粒表面发生膨胀和软化，? When the foundation of the 15th Bureau of the Ministry of Railways was being treated to deal with the sinking of the check-out floor of the Houma North Station, the ground was reinforced with the soda-ash mixing method and the success was achieved. In this method, the sodium hydroxide solution is poured into the soil to react with a large amount of soluble exchangeable alkaline metal cations such as magnesium and calcium in the loess, and the generated hydroxide is attached to the surface of the earth particles. At the same time, the sodium hydroxide solution will cause swelling and softening of the surface of the soil particles.