高速公路软基采用土工合成材料加固处理效果分析

Application Effectiveness Analysis of Geosynthetics in Soft Ground of Expressway

报导了某高速公路软基采用土工合成材料 (有纺土工布和土工格栅 )加固效果。实测资料分析得到有纺土工布或土工格栅加固高速公路软基 ,可减少地基沉降量 ,提高地基承载力 ,均化地基应力 ,减少差异沉陷 ,减少地基侧向变形和压缩层影响深度 ,加固效果无疑对地基的稳定是十分有利的。由于有纺土工布处理软基能减少地基沉降量 ,因此 ,可相对减少施工填方量 ,未打砂井可相对降低工程造价。单层土工格栅优于单层土工格栅加两层有纺土工布的加固效果。

The application effectiveness of geosynthetics(woven fabrics and geo grillage) in soft ground of expressway is present.The prototype observing data demonstrate that the woven fabrics or geo grillage decreases the ground settlement,differential settlement,lateral displacement and compressible layer depth,increases the ground bearing capacity,equilibrates the ground stress,and improves the ground stability. Because the fill volume can be decreased resulted from the decrease of settlement of ground treated by woven fabrics,and the wick drains is left out,the project cost is decreased.The tests also indicate that the effectiveness of a layer of geo grillage is better than that of the combination of a layer of geo grillage and two layers of woven fabrics.The conclusions can be used to similar project for reference.