Railway Engineering Research Institute of China Academy of Railway Sciences Corporation Limited

National Center for Nanoscience and Technology

China Academy of Railway Sciences Corporation Limited

China Academy of Railway Sciences Corporaton Limited Railway Engineering Research Institute

Beijing Tieke Shougang Track Technology Co., Ltd

Jia Fan

Xianggang Du

Weibin Liu

Yong Zhao

Cheng Jiang

Jijun Wang

Ruilin You

Ziqing Jiang

Meng Wang

Yuliang Zhao

Guangjun Nie

Liangshan Xu

Zhanguo Ma

Lu Chunfang

Tony Hu

Zhenyu Tan

Mauro Ferrari

Yangsheng Ye

Chunfang Lu

Youming Zhao

A fiber-reinforced prestressed reinforced concrete sleeper is integrally cast and includes a sleeper body and two rail bearing regions. A rail clamping base is arranged on a surface of the each rail bearing region. The two rail bearing regions are located under rails on both sides of the sleeper and the two rail bearing regions are located above the sleeper body. A reinforcing fiber is mixed into the two rail bearing regions only, and a reinforcing rib is arranged in the sleeper body. The reinforcing fiber is concentrated in a main stress region under the surface of the rail bearing regions. The reinforcing fiber arranged in a region with a large stress is more than the reinforcing fiber arranged in a region with a small stress.

Fiber-reinforced prestressed reinforced concrete sleeper

A ballastless track system comprises a base; a track slab arranged above the base; a poured-field layer arranged between the base and the track slab, the poured-field layer being formed by filling self-compacting concrete, emulsified asphalt cement mortar or resin mortar, and the inside of the poured-field layer being of a steel bar structure; a connecting piece, the first end of the connecting piece extending into the track slab, and the second end of the connecting piece extending into the poured-field layer; and two rows of rail-seat arranged on the track slab in parallel; and rails arranged on the rail-seat. The ballastless track system is high in reliability, good in durability, and easy in construction and maintenance.

Ballastless track system

Provided in the disclosure is a pre-stressed concrete track slab of slab-type ballast-less track, which includes a slab body (), on which fastening embedded casings () are arranged. At least one row of longitudinal common steel bars () and at least one row of transverse common steel bars () are arranged in the slab body () along a length direction and a width direction. The longitudinal common steel bars () are insulated from the transverse common steel bars (). At least one row of longitudinal pre-stressed steel bars () and at least one row of transverse pre-stressed steel bars () are fastened in the slab body () along the length direction and the width direction through anchor backing plates and fastener devices (). In the pre-stress directions of the longitudinal pre-stressed steel bars () and the transverse pre-stressed steel bars (), it is post-tensioned in both directions or it is pre-tensioned in one direction and post-tensioned in the other direction. Limiting structures () and grounding terminals () are also arranged on the slab body (). The pre-stressed concrete track slab has the characteristics of light structural dead weight, small structure height, low manufacturing cost and deformation resistance.

Pre-stressed concrete track slab of slab-type ballast-less track

A method for detecting hepcidin. Having a sample liquid in contact with a nanochip having a specific surface coating structure of silicon oxide, so that hepcidin is enriched with specificity; eluting the nanochip with an eluent; by performing mass spectrometric detection on the elution product, determining the hepcidin content in the elution product. The enrichment method substantially enhances the sensitivity and accuracy of mass spectrometric detection. A kit for detecting hepcidin comprising a sample diluent and a nanochip, the sample diluent comprising water, trifluoroacetic acid, and acetonitrile.

Method and kit for detecting hepcidin

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Jia Fan