通过工程实例，阐述了砂砾混合集料在基坑大开挖回填中的应用。
Through the engineering examples, this paper expounds the application of the sand-gravel blended aggregate in the back-filling of the big-excavation of the foundation ditch.
介绍了输气管道以大开挖方式穿越河流的施工，探讨了降水计算和施工注意事项。
The construction of gas transmission pipeline passing through the Luo River by excavation is introduced, and calculation of reducing the water level and construction attention items are discussed.
黑河是西部管道工程采用大开挖方式穿越的距离最长的河流， 原油与成品油管道采用同沟敷设方式穿越该河流。
West Pipeline crossing Heihe River is the longest crossing project by a large excavation way and the method of laying both crude oil pipeline and products pipeline in a single trench.
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