| abstract |
The invention provides a construction method for short-distance mud-water balance pipe jacking in sand ginger clay stratum. The main operation steps of the present invention are to firstly set out the axis, then install the pipe jacking equipment in the well with the axis of the set out, then prepare and inject thixotropic mud, and finally carry out During the jacking process of the pipeline, the present invention adopts the double-row close-distance pipe jacking mud-water balance construction method to jack the pipeline. The double-row pipeline is the left-line pipeline and the right-line pipeline respectively, and the right-line pipeline pushes forward. When the left line pipeline is installed and welded synchronously, when the left line pipeline is advanced, the right line pipeline is installed and welded simultaneously, the left line pipeline and the right line pipeline cross construction, and the construction ends after both the left line pipeline and the right line pipeline enter the hole. The invention adopts the method of alternate construction of short-distance double-row pipe jacking to construct the geology containing sand ginger clay, which not only overcomes the characteristics of high viscosity and high friction coefficient of the sand ginger clay, but also reduces the number of double-row pipes. Interaction between pipelines during construction. |