Pipe ditch excavation and backfill construction method: Fid-Bau Portal

Pipe ditch excavation and backfill construction method

LIU ZENGXIANG / MA QINBIAO / HAN JIANXUN / MI GUANGJIE / LI BIN / ZHANG WEI

The invention provides a pipe ditch excavation and backfill construction method, and belongs to the technical field of pipeline laying. The method comprises the following steps of S1, according to theexcavation depth of a pipe ditch, excavating the pipe ditch in a layered manner from top to bottom, and carrying out separated storage on soil which is excavated in each layer; S2, pre-treating the soil excavated in each layer; S3, adjusting the water containing rate of the soil excavated in each layer; S4, according to the soil excavated in each layer, preparing fluidification backfill soil; S5,performing layered backfill of the prepared fluidification backfill soil to the excavated pipe ditch, and enabling the backfill depth of each layer to be same with the excavation depth of the corresponding layer; and S6, after solidifying of the fluidification backfill soil, carrying out a strength test. The pipe ditch excavation and backfill construction method is easy and convenient to construct, and convenient to construct, resource use of the excavated soil can be achieved, and foundation uneven settlement can be reduced.

本发明提供了一种管沟开挖和回填施工方法，属于管道铺设技术领域，包括以下步骤：S1：根据管沟开挖深度，自上而下分层开挖管沟，并将每层挖出的土料分开存储；S2：分别对每层挖出的土料进行预处理；S3：调整每层挖出的土料的含水率；S4：根据每层开挖的土料分别配制流动化回填土；S5：将配制的流动化回填土分层回填至开挖的管沟中，每层回填深度与相应层的开挖深度相同；S6：流动化回填土凝固后，进行强度测试。本发明提供的管沟开挖和回填施工方法，操作简便，便于施工；实现开挖土料的资源化利用；减少地基不均匀沉降。

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