Abstract：Research purposes: For the freight traffic，the heavy haul is the one of the development trends．Now the axis load is 25t in China，the target is 30t in the near future．The increase of axis load will bring the bigger load to the rail and the foundation under the rail，resulting in the increase of tunnel base disease．So it is necessary to study the impact of heavy axis load on the tunnel base and the technical standard for the tunnel under 30t axis load．
Research conclusions: The section design of railway tunnel for heavy haul traffic based on the Taihangshan mountain tunnel for mixed passenger and freight traffic is basically feasible．The simple grate layer should be canceled to the railway tunnel for heavy haul traffic．The invea should be installed when the surrounding rock grade is m or above．The ratio of rise to span and the depth of the invert should not be lower than the standard for passenger dedicated line tunnel．Lots of tests on site and measurements must be done before working out the tunnel technical standard under 30t axis load because of the complexity of train load and variance of the surrounding rock．
王秀英，龚增进，刘维宁. 30 t轴重条件下隧道技术标准研究[J]. 铁道工程学报, 2009, 26(5): 54-58.
WANG Xiu—ying，GONG Zeng—jin，LIU Wei—ning. Research on the Tunnel Technical Standard under 30t Axis Load. 铁道工程学报, 2009, 26(5): 54-58.
2009, Vol. 26 
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