预拌流态固化土肥槽回填施工技术

CONSTRUCTION TECHNOLOGY FOR FERTILIZER BACKFILLING OF PREMIXED FLUIDIZED SOLIDIFIED SOIL

在基坑肥槽回填施工过程中,为了解决因基坑肥槽回填材料或施工质量不满足设计要求引起的肥槽回填土沉降变形,继而导致室外散水沉降开裂,甚至地下室外墙防水破坏等工程事故,结合工程实际,介绍了预拌流态固化土肥槽回填施工技术。工程实践证明,预拌流态固化土作为肥槽回填材料具有早期强度较高、流动性和自密实性强、抗渗性好的特点,保证了回填质量,缩短了施工周期,取得了良好的经济效益。

During the construction of foundation pit fertilizer tank backfilling,to solve the settlement and deformation of the backfill soil of the fertilizer tank caused by the backfill material of the foundation pit or the construction quality not meeting the design requirements,and then lead to engineering accidents such as settlement and cracking of outdoor apron,and even waterproof damage of basement exterior wall.Combining with engineering practice,this paper introduced the construction technology for fertilizer backfilling of premixed fluidized solidified soil.The engineering practice has proved that the premixed fluidized solidified soil as the backfill material of fertilizer tank has high early strength,strong fluidity and self-compaction,good impermeability,guaranteed the backfill quality,shortened the construction period,and achieved good economic benefits.