大口径埋地塑料管道沟槽回填压实度试验研究

大口径埋地塑料排水管道作为柔性管道.具有管土共同作用的结构受力特征。施工中沟槽回填压实度对管道的承载能力影响很大。结合大口径塑料管道砂箱试验的相关研究成果,探讨沟槽回填压实度这一关键因素对大口径埋地塑料排水管道施工质量的影响=结果表明,提高大口径埋地塑料管道管侧沟槽回填土压实度对提高土的变形模量起到重要作用,进而减小管道变形。

Experimental Study on Groove Backfill Compactness of Large-diameter Buried Plastic Pipe

As the flexible pipe,the large-diameter buried plastic drainage pipe has the structural stress characteristic of pipe-clay combined action.The groove backfill compactness has the large influence on the hearing capacity of pipe in the construction.According to the relative study result of large-diameter plastic pipe sand-box test,this paper discusses the influence of this key factor of groove backfill compactness on the construction quality of large-diameter buried plastic drainage pipe.The result shows that the improvement of groove backfill compactness of large-diameter buried plastic pipe plays an important role in the improvement of deformation modulus so as to decrease the pipe deformation.