输气管线穿越河流工程,常常会遇到一些砂质河床。尤其是对那些砂质较厚,结构又非常松散,类似流砂性质的河床,往往由于砂粒回淤速度太快,给施工带来了一系列问题。例如:如何挖掘河底管沟,如何沉管以及如何稳管等等。对于稳管桩的施工来说,关键问题是如何克服由于砂粒迅速的回淤而引起钻成的桩孔很快又被淤没,从而造成植桩困难,无法回桩,以致施工失败。本文主要介绍在砂质 Gas pipeline through the river project, often encounter some sandy riverbed. Especially for those thick sandy, the structure is very loose, similar to the nature of the sand flow bed, often due to the silt back silting too fast, to bring a series of construction problems. For example: How to excavate the river bottom trench, how to sink the tube and how to stabilize it. The key problem for the construction of stabilized pile is how to overcome the problem that the pile hole drilled due to rapid siltation of sand will soon be silted up, resulting in difficulty of planting pile and unable to pile back, thus resulting in failure of construction. This article focuses on the sandy