scholarly journals Construction and field measurement of high-speed railway test embankment built on Indian expansive soil “Black Cotton Soil”

2020 ◽  
Author(s):  
Kenji Watanabe ◽  
Susumu Nakajima ◽  
Torajiro Fujiwara ◽  
Kyoichiro Yoshii ◽  
G. Venkatappa Rao
Keyword(s):  
Field Measurement ◽  
High Speed ◽  
Expansive Soil ◽  
Black Cotton Soil ◽  
High Speed Railway ◽  
Test Embankment

Train Detection by Magnetic Field Measurement with Giant Magnetoresistive Sensors for High-Speed Railway

2013 ◽  
Vol 284-287 ◽  
pp. 2102-2114 ◽  
Author(s):  
Shu Qi Zhang ◽  
Wing Kin Lee ◽  
Philip W.T. Pong
Keyword(s):  
Magnetic Field ◽  
Field Measurement ◽  
High Speed ◽  
Detection System ◽  
Magnetic Field Measurement ◽  
Signaling System ◽  
High Speed Rail ◽  
High Speed Railway ◽  
Rail System ◽  
Safety And Reliability

Train detection, as part of the railway signaling system, is important for safe operation of high-speed railway. The recent flourishing development of high-speed railway stimulates the research need of train detection technology to enhance the safety and reliability of train operation. This paper proposes a new technique for train detection through magnetic field measurement by giant magnetoresistive sensors. This technology was studied by the analysis of magnetic field distribution in the high-speed rail system obtained from modeling and simulation. The results verify the feasibility for detection of train presence, number of rolling stocks, speed, and length. It can overcome the limitations of track circuits and provide additional measurement capabilities to the signaling system. This detection system can be built with low cost and minimal maintenance load as well as compacted construction. Therefore, it may serve as a new train detection system to help improve the current systems, enhancing and promoting the safety and reliability of high-speed rail system.

Field Measurement of Dynamic Properties of Honam High-Speed Railway Bridges

2021 ◽  
Vol 24 (4) ◽  
pp. 386-394
Author(s):  
Seunghoo Jeong ◽  
Hyunmin Kim ◽  
Sung Il Kim ◽  
Jeong-Hwan Jang ◽  
Kyoung-Chan Lee
Keyword(s):  
Field Measurement ◽  
High Speed ◽  
Dynamic Properties ◽  
High Speed Railway ◽  
Railway Bridges

scholarly journals Field study on swelling-shrinkage response of an expansive soil foundation under high-speed railway embankment loads

2018 ◽  
Vol 58 (6) ◽  
pp. 1538-1552 ◽  
Author(s):  
Guanlu Jiang ◽  
Weizhi Chen ◽  
Xianfeng Liu ◽  
Shengyang Yuan ◽  
Lijun Wu ◽  
...  
Keyword(s):  
Field Study ◽  
High Speed ◽  
Expansive Soil ◽  
High Speed Railway ◽  
Soil Foundation

Investigation of immersion influence on dynamic properties of high-speed railway subgrade with semi-rigid waterproof functional layer through field-excitation testing

2018 ◽  
Vol 55 (1) ◽  
pp. 19-33 ◽  
Author(s):  
Liang-liang Wang ◽  
Xiaoqin Lei ◽  
Shukui Liu
Keyword(s):  
High Speed ◽  
Large Scale ◽  
Dynamic Properties ◽  
Expansive Soil ◽  
Fatigue Property ◽  
Vibration Velocity ◽  
Bottom Surface ◽  
Functional Layer ◽  
High Speed Railway ◽  
Immersion Condition

The subgrade below the under-construction Kunming–Shanghai high-speed railway faces serious stability problems induced by considerable swelling and shrinkage volume change of expansive soil along with variation of moisture content. To prevent the occurrence of potential damage, reasons for the frequent occurrence of drainage ditch breakage and platform damage along the railway corridor in expansive soil areas were analyzed. A novel integral ancillary facility and semi-rigid waterproof functional layer were developed. Large-scale field dynamic tests were carried out to investigate the fatigue performance of the waterproof functional layer and the influences of different service environments (relatively dry condition and immersion condition) on the dynamic response of the subgrade. Results show that the fatigue property and waterproofing capability of the waterproof functional layer can fulfill the standard requirements for the high-speed railway subgrade. There was an enlargement phenomenon of the dynamic stress and vibration velocity when the service environment of subgrade changed from a relatively dry condition to an immersion condition. The vibration velocity seemed to increase along the depth of the graded broken stone surface layer and decrease linearly with further depth increase from the bottom surface of the waterproof functional layer.

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