为考察气泡制备因素对河道淤泥气泡混合土性质的影响,以河道淤泥为原料土,通过对不同发泡剂成泡品质考察及发泡剂的优化配合设计,采用对比试验的方法,对河道淤泥气泡混合土的物理力学性质进行了研究。试验结果表明不同类型的发泡剂及发泡剂成泡品质对混合土性质影响明显,所选蛋白发泡剂在料浆中稳泡性变差,不满足密度要求;在同等密度下,气泡品质好的F型发泡剂制备的轻质土,其强度、破坏应变和E₅₀均高于K12A型。这种具备稳泡性好、发泡倍数不易过低、成泡较均匀、可与料浆共存的成泡品质,有利于轻质土综合性能的提升。

The aim of this research is to investigate the influence of bubble preparation factors on the properties of foamed mixture soil using river sludge. We examined the foaming performance of different foaming agents and prepared a mixed foaming agent F by optimizing the proportions of foaming agents. On this basis, we analyzed the physical and mechanical properties of the foamed mixture soil with river sludge as raw material through contrast test. Results showed that different types and qualities of foam agents have apparent influence on the properties of the mixture soil. Protein foaming agent is of poor ability in stabilizing foams, hence could not meet density requirement. Under the same density, the lightweight soil prepared by foaming agent F is superior to that by foaming agent K12A in terms of strength, strain at failure and E₅₀. In conclusion, good performance of foam-stabilization, expansion rate of foam, uniform bubbles, and co-existence with soil slurry would be beneficial to improving the comprehensive performance of light-weighted soil.