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Lu H.,Wuhan University | Fang C.,Wuhan University | Wu Z.,7th Institute of Geology and Mineral Exploration
ICPTT 2011: Sustainable Solutions for Water, Sewer, Gas, and Oil Pipelines - Proceedings of the International Conference on Pipelines and Trenchless Technology 2011 | Year: 2011

In the fields of laying pipe line with the trenchless methods, the pipe ramming, which features simple operation, high precision, fast speed and low cost, is welcome by most of construction units. In the works of laying straight, short distance pipes, the pipe rammers have good market as the first selected, economic, fast operation technology. This paper put forward the design of the new electric pipe rammer. Based on a totally different work mechanism from traditional ramming equipment-pneumatic pipe rammer, this new electric pipe rammer is driven by electricity. Therefore, it could be used not only in field, but also in urban district where the government limited the noise and dust pollution in the construction. Due to the fact that the electric pipe rammer can run without the air compressor, this unit is simple structure, easy installation, maintenance and transportation. Through comprehensive summing-up for the research and practice of the pipe rammer, and analyzing the structure and operation principle of the electric pipe rammer, the paper aimed at further developing the pipe-lay technique of pipe rammer, providing certain theoretical and practical basis and propelling the development of the trenchless underground pipe line technique. © 2011 ASCE.


Huang F.,Wuhan University | Lu H.,Wuhan University | Wu Z.,7th Institute of Geology and Mineral Exploration
ICPTT 2011: Sustainable Solutions for Water, Sewer, Gas, and Oil Pipelines - Proceedings of the International Conference on Pipelines and Trenchless Technology 2011 | Year: 2011

It is difficult to avoid the landslide for the buried pipeline in the West-East gas transmission project, because of the influence of topography, expense and so on. And the stability of landslide affects the pipeline of long-term security importantly. Based on the deformation analysis of a landslide, the pipeline stress was studied by using the FlAC3D under the landslide thrusting force. Changed the pipeline buried depth, position and dip between pipe axis and landslide sliding direction and established different combination by the Orthogonal Experiment. And the stress characteristics of pipeline were understood. According to the shear stress, the buried pipeline optimization scheme was proposed, that the depth was 4m, the position was 0m and the dip was 30 degree. That has some values for the pipeline construction in landslide area. © 2011 ASCE.

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