黑棉土路基施工技术探讨

Discussion on construction technology of black-cotton soil roadbed

黑棉土是分布于东非地区的一种特殊土层,是由火山灰与地表植物相结合的一种产物.由于蒙脱石矿物成分很高,是水化膨胀性很强的土壤,黑棉土遇水后膨胀,失水后收缩并产生龟裂;而肯尼亚地区每年有两个雨季两个旱季,干湿气候变化明显.黑棉土的胀缩特性及当地气候变化直接影响了黑棉土路基换填设计方案.

Black - cotton soil is a special soil distribution in East Africa. It is product of the combination of the volcano ash and ground flora, due to high montmorillonite mineral composition, is the hydration expansion of strong soil. Black - cotton soil expands after water, dehydrates, contracts and produces cracks. In Kenya, there are two rainy seasons in two dry seasons each year, and the dry and wet climate changes obviously. The shrinkage and shrinkage characteristics of black - cotton soil and local climate change directly affect the design scheme of black - cotton soil roadbed replacement.