软基处理路堤极限填高计算分析

根据吉林省东部山区广泛分布的草炭土软土层的力学特性，针对反压护道、土工格栅、聚苯乙烯泡沫塑料块、砂桩、砂砾换填及土工格栅加聚苯乙烯泡沫塑料板等6种公路常用的软基处理措施，对天然软土地基及处理后的地基用JANBU法进行稳定性计算，得出指导施工快速填筑而不致失稳的路基极限填高。经过对数据进行分析比较，发现处理此种软基最有效的方法是用砂砾换填。处理后路基的极限填高可提高2．4m；其次是砂桩加复合土工布、土工格栅加聚苯乙烯泡沫塑料板，极限填高可提高1．9m；而反压护道应根据不同的路基填高对其宽度进行必要的调整，才能达到预期目的。

Calculation Analysis of Embankment Limit Height for Soft Soil Foundation Treatment

According to the mechanics characteristics of grass carbon soil wide distributing in the eastern mountainous areas of Jilin Province, six measures are commonly used for soft soil foundation treatment, such as loading berm, geogrid, polystyrene plastic blocks, sand piles, sand-gravel replacement and geogrid with polystyrene plastic board, etc. Through analysis and comparison of the data, the most effective method for soft soil foundation treatment is sand-gravel replacement for limit height of embankment 2.4 m; then come the sand pile with compound geotextile and geogrid with polystyrene plastic board for limit height 1.9 m; as to the loading berm, its width should be adjusted in accordance with different fill height so as to meet the estimated purpose.