泡沫轻质土渗透及吸失水性能试验研究

通过对湿重度分别为5.5 k N/m³、6 k N/m³的泡沫轻质土进行渗透及吸失水试验,研究了泡沫轻质土的孔隙状态、渗透系数及吸失水性能。试验结果表明：气泡混合轻质土是一种高孔隙率材料,其孔隙占比在75%以上,渗透系数约为10^-5～10^-6数量级,介于粉质粘土与粘土的渗透系数之间;受水浸泡后,泡沫轻质土容重最大增加约25%,失水后容重仍然有约9.5%增加量,在工程设计中应根据不同置换路基施工环境对设计容重按照1.0～1.25之间进行修正。

Experimental Study on Permeation and Water Absorption Properties of Foamed Light Soil

Trough the experiment of permeation and water absorption of the foamed light soil respectively with the wet weight 5.5 kN/m3 and 6 kN/m3, the porosity status, permeability coefficient and water absorption performance of the foamed lightweight soil are studied. The experimental results show that the bubble mixed light soil is a high-porosity material. Its pore ratio is more than 75%. The permeability coefficient is about 10-5~10-6 order of magnitude, which is between the permeability coefficients of silty clay and clay. After water immersion, the bulk density of foamed light soil increases by a maximum of about 25%, and the bulk density after water loss still increases by about 9.5%. The design bulk density should be corrected between 1.0~1.25 in the engineering design according to the construction environment of different replaced subgrades.