双液注浆法在巨厚填土层加固施工中的应用

承德某桩基工程,在无法干成孔作业的巨厚层矿渣地层中,首先采用双液注浆法加固,然后再进行旋挖钻机干成孔。实践表明,该方法在处理松散的巨厚填土层加固是可行的,能达到良好的处理效果;控制配比和溶液的使用量是关键;加固后的土体自稳能力和承载力均有所提高。

Application of Double-liquid Grouting Method in Consolidation Construction of Extremely Thick Fill Soil Layer

In the slag formation of a pile foundation engineering of Chengde, dry hole-forming operation could not be applied in extremely thick fill soil layer, double liquid grouting method was used first for consolidation and then dry hole-forming construction was made by rotary drilling rig. The practice shows that this method is feasible in the loose extremely thick fill soil consolidation with good treatment effect. In this case, the ratio and volume of solution are the key factors. The self-stable ability and the bearing capacity of the soil are improved by consolidation.