Investigating the mud pumping and interlayer creation phenomena in railway sub-structure

Duong, Trong Vinh; Cui, Yu‐Jun; Tang, Anh Minh; Dupla, Jean Claude; Canou, Jean; Calon, Nicolas; Robinet, Alain

doi:10.1016/j.enggeo.2013.12.016

Cited by 121 publications

(60 citation statements)

References 32 publications

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“…When the high-speed train moves across the section at high speed, the graded crushed stone a ected by water under the slab track may produce mud pumping, as shown in Figure 2. According to Su et al, [5,6,18,24] carried out several eld investigations on the characteristics and reinforcement method of mud pumping of the slab track-subgrade and performed largescale triaxial tests for graded crushed stone with di erent water content, Cai et al [17] investigated mud pumping mechanism of subgrade surface layer in slab ballastless track zone, and Duong et al [12] studied the mud pumping and interlayer creation phenomena in railway substructure; mud pumping occurs in the graded crushed stone subjected to cyclic dynamic loading when the graded crushed stone is in the near saturated conditions. In other words, the graded…”

Section: Experimental Schemesmentioning

confidence: 99%

“…At present, many researchers have conducted laboratory and eld tests to analyze the pore water pressure development in the contact layer between the pavement and subbase and the ballast track bed, as well as the in uence of the excess pore water pressure on ne particle migration [7][8][9][10][11][12]. Furthermore, various remedial measures are proposed to reinforce mud pumping in the highway subgrade and ballast track [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Vibration Behavior and Reinforcement Effect Analysis of the Slab Track‐Subgrade with Mud Pumping under Cyclic Dynamic Loading: Full‐Scale Model Tests

Huang

Wang

et al. 2018

Shock and Vibration

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Mud pumping occurring in the subgrade bed can gradually deteriorate the performance of the slab track-subgrade, negatively affecting the comfort and safety of high-speed railway. In this paper, a full-scale model of the slab track-subgrade was established to analyze the vibration behavior of the model in normal condition and before and after mud pumping reinforced, as well as the reinforcement effect of mud pumping using low-viscosity epoxy resin. The research results show that the vibration acceleration and displacement and the settlement of the model in normal condition stabilize gradually with the increasing number of loading cycles. Under the upper layer of the subgrade bed saturated by water, mud pumping occurs in the subgrade bed as soon as the second loading stage reaches to 3.0 × 104 cycles, and the deterioration of mud pumping increases gradually with the increasing number of loading cycles. Moreover, a large volume of slurry composed of water and fine particles is squeezed out of the subgrade bed after the model is subjected to the second cyclic loading stage of 2.0 × 106 cycles, causing contact loss between the concrete base and the subgrade bed, which makes the acceleration and displacement of the concrete base increase abnormally compared with the model in normal condition, as well as the cumulative settlement of the subgrade bed. The model with significant mud pumping in the upper layer of the subgrade bed was reinforced by using low-viscosity epoxy resin. This effectively controlled the abnormal acceleration and displacement of the concrete base and restored the support capability of the subgrade bed for the concrete base of the slab track structure.

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Section: Experimental Schemesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vibration Behavior and Reinforcement Effect Analysis of the Slab Track‐Subgrade with Mud Pumping under Cyclic Dynamic Loading: Full‐Scale Model Tests

Huang

Wang

et al. 2018

Shock and Vibration

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“…A physical model was developed for this purpose [53][54]. Figure 17 show it with a 3D view (Figure 17a), a side view (Figure 17b) and a view of cross section A-A (Figure 17c).…”

Section: Physical Modelling Of Interlayer Creation Of Mud-pumping Phementioning

confidence: 99%

Unsaturated railway track-bed materials

Cui

2016

E3S Web Conf.

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Abstract. Railway track-bed materials are mostly in unsaturated state, and their hydro-mechanical properties depend strongly on their water contents or suctions. In France, problematic soils such as collapsible loess and swelling marl can be origin of instability problems for new lines for high speed trains, while the hydro-mechanical behaviour of interlayer soil formed mainly by interpenetration of ballast and subgrade soil is of concern for conventional lines. In the latter case, the main challenge relies in the large variability of the interlayer soils owing to the variability of natural subgrade soils involved in the railway network. In this paper, a study on interlayer soils is presented, that covers a large spectrum of aspects: geotechnical/geophysical site characterisation, laboratory investigation into the hydraulic behaviour and mechanical behaviour as well as the mud pumping/interlayer creation phenomena, and field monitoring. The combined effect of water content and fines content were emphasized in the laboratory investigation, whilst interaction between atmosphere and track was focused on in the field monitoring. The results show clearly that it is of paramount importance to consider the unsaturated aspect of track-bed materials when analysing the overall behaviour of tracks, in particular when clay is involved in fine fraction.

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“…Mud pumping has occurred in several spots in Chinese high-speed railways in recent years [6][7][8]. Several scholars have studied the main parameters that induced the defect of mud pumping under slab tracks [9][10][11]. eir studies show that when the sealing material of slab tracks has some cracks, the rainwater could penetrate into the subgrade surface easily.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Vibration Responses in High‐Speed Railways considering Mud Pumping Defect

Shao

et al. 2019

Shock and Vibration

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As a newly appeared defect under slab tracks in high-speed railways, mud pumping weakens the support ability of the subgrade to slab track, bringing about deviations on the vibration responses of the vehicle, slab track, and subgrade. Therefore, this paper proposes a vehicle-slab track-subgrade coupled model based on the multibody simulation principle and the finite element theory to highlight the influences of mud pumping defect. As an external excitation to this model, random track irregularity is considered. In order to simulate the mud pumping defect, the contact between the concrete base and subgrade is described as a spring-damper system. This model is validated by field test results and other simulation results, and a very good agreement is found. The vibration responses of the vehicle, slab track, and subgrade under different mud pumping lengths and train speeds are studied firstly. The deviations of vibration responses in high-speed railways induced by mud pumping are then obtained, and the limited mud pumping length is put forward finally to provide a recommendation for maintenance works of high-speed railways in practice.

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Investigating the mud pumping and interlayer creation phenomena in railway sub-structure

Cited by 121 publications

References 32 publications

Vibration Behavior and Reinforcement Effect Analysis of the Slab Track‐Subgrade with Mud Pumping under Cyclic Dynamic Loading: Full‐Scale Model Tests

Vibration Behavior and Reinforcement Effect Analysis of the Slab Track‐Subgrade with Mud Pumping under Cyclic Dynamic Loading: Full‐Scale Model Tests

Unsaturated railway track-bed materials

Numerical Analysis of Vibration Responses in High‐Speed Railways considering Mud Pumping Defect

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