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Vol. 186, Issue 3, March 2015, pp. 154-160




Study on Mud Pumping Mechanism of Subgrade Surface Layer
in Slab Ballastless Track Zone

1 Xiaopei CAI, 1 Xianghui CAI, 1 Kexu LIU, 2 Haoyu WANG, 1 Liangwu GUO

1 School of Civil Engineering, Beijing Jiaotong University, No. 3 Shangyuancun, Haidian District, Beijing, 100044, China
2 Faculty of Civil Engineering and Geo-Sciences, Delft University of Technology, Stevinweg 1 2628 CN, Delft, P. O. Box 5048 2600 GA, The Netherlands
1 Tel.: +86-152-1058-4571, fax: +86-010-51683764

E-mail: xpcai@bjtu.edu.cn


Received: 3 February 2015 /Accepted: 3 March 2015 /Published: 31 March 2015

Digital Sensors and Sensor Sysstems


Abstract: Mud pumping has a significant impact on dynamic behavior of high-speed railway. An elaborate study focused on the structure characteristics of CRTS I (China Railway Track System) slab ballastless track was made to explain the mechanism of mud pumping from the aspects of displacement between the base plate and subgrade, gap growing, disfunction of drainage system and dynamic load of the train. Finite element software ABAQUS was applied to simulate the dynamic responses between the base plate and the subgrade surface layer in different conditions of gap length and gap size. It has been found that the dynamic force between the base plate and the surface layer of subgrade is up to 4,576.29 kN. Suggestions have been given to the related department such as slip-casting, white-out, sealing plug to solve the problem.


Keywords: High-speed railway, Graded crushed stone, Subgrade surface layer, Mud pumping, Dynamic model, Mechanism.


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