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黄土湿陷性对地基沉降变形有重要影响,目前有多重处理方法。结合青海曹家堡机场跑道地基黄土的实际特点,分别采用振动碾压、冲击碾压与强夯法进行的处理,通过处理后的检测结果分析表明:冲击碾压则基本可以完全消除0.5m深度以内地基土的湿陷性,对0.5～1.0m范围内地基土湿陷系数有一定减小作用;强夯消除地基土湿陷性效果最佳,600kJ强夯场地完全消除湿陷性深度为2m左右,较大能级的强夯可完全消除大于2m深度以下地基土的湿陷性。
Collapsibility of loess has an important influence on the settlement and deformation of the foundation. Currently, there are multiple treatment methods. Combining with the actual characteristics of loess foundation in Qinghai Caojiabao airport runway, vibration, roller compaction and dynamic compaction are adopted respectively. The analysis of the test results shows that impact crushing can basically eliminate the depth of 0.5m The collapsibility of the subsoil within the subsoil has a certain reduction effect on the collapse coefficient of the subsoil in the range of 0.5 ~ 1.0m. The compaction has the best effect on subsoil collapse, and the subsidence depth of the 600kJ compacted land is 2m So that the dynamic compaction of larger energy level can completely eliminate the collapsibility of foundation soil below the depth of 2m.