Application of Strong Tamping and its Replacement Technology in Reinforcing Composite Subgrade of Railway Passenger Dedicated Line

QIN Bao-he

Journal of Railway Engineering Society ›› 2007, Vol. 24 ›› Issue (7) : 33-37.

PDF(543 KB)
PDF(543 KB)
Journal of Railway Engineering Society ›› 2007, Vol. 24 ›› Issue (7) : 33-37.

Application of Strong Tamping and its Replacement Technology in Reinforcing Composite Subgrade of Railway Passenger Dedicated Line

  • QIN Bao-he
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Abstract

Research purposes: The purposes are to do research on the applicable effects of strong tamping and its replacement technology used for reinforcing composite subgrade of railway passenger dedicated line.
Research methods : Based on the construction practice of reinforcing weak soil composite subgrade in the experiment section of Wuchang-Guangzhou Railway Passenger Dedicated Line, the systematic researches are done on application of strong tamping and its replacement technology in reinforcing subgrade of passenger dedicated line from the fields of selection of construction method, design of technique procedure and quality control according the engineering geological conditions.
Research results: Taking the performances of construction machinery and geological conditions into account, the tests of strong tamping and its replacement technology are done in the different typical areas in Wuhan Experiment Section and the comparison and analysis are made for the tested results before and after strong tamping to determine the its applicability for Wuchang-Guangzhou Passenger Dedicated Line under similar geological conditions, improve the construction technique,sum up its experience and lay down the technical parameters and test methods. The practice shows strong tamping and its replacement technology are feasible for reinforcing subgrade with satisfying the requirements of bearing capacity and design deformation and better control post-construction settlement.
Research conclusions: Tamping capacity is an important index of reinforcement depth for using tamping and its replacement technology. It needs rational interval time to use strong tamping and its replacement technology for reinforcing clay soil, especially for saturated clay soil. Strong tamping and its replacement technology are suitable for reinforcing the composite subgrade of passenger dedicated line.

Key words

passenger dedicated line / composite subgrade / strong tamping / strong tamping replacement / test / construction technique / quality control

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QIN Bao-he. Application of Strong Tamping and its Replacement Technology in Reinforcing Composite Subgrade of Railway Passenger Dedicated Line[J]. Journal of Railway Engineering Society, 2007, 24(7): 33-37

References

[1]曾俊杰.地基处理技术[M].武汉:华中科技大学出版 社,2003.
[2]铁建设[2005]160号,客运专线铁路路基工程施工质量 验收暂行标准[S].
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