US 2021/0123191 A1 · FIBER-REINFORCED PRESTRESSED REINFORCED CONCRETE SLEEPER

Fiber-reinforced prestressed reinforced concrete sleeper

AssigneesChina Academy of Railway Sciences Corporation Limited Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing Tieke Shougang Track Technology Co. , Ltd

InventorsYangsheng YE, Ruilin YOU, Jia FAN, Weibin LIU, Xianggang DU, Zhenyu TAN, Zhanguo MA, Liangshan XU

Life of this patent

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Abstract

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.

Claims13

Dependent claims

A fiber-reinforced prestressed reinforced concrete sleeper, comprising a sleeper body and two rail bearing regions, wherein the fiber-reinforced prestressed reinforced concrete sleeper is integrally cast;

a rail clamping base is arranged on a surface of the each rail bearing region of the two rail bearing regions;
the two rail bearing regions are located under rails on both sides of the fiber-reinforced prestressed reinforced concrete sleeper, respectively, 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 each rail bearing region.

1 more element

A method for manufacturing the fiber-reinforced prestressed reinforced concrete sleeper according to claim, comprising:

employing two pouring pipelines, wherein a first pouring pipeline of the two pouring pipelines is configured to pour a pure concrete, and a second pouring pipeline of the two pouring pipelines is configured to pour a mixture with a maximum reinforcing fiber ratio;
connecting the two pouring pipelines to a discharge port, respectively, wherein a stirrer is arranged at the discharge port;
simultaneously pouring by the two pouring pipelines to form the sleeper body;
and simultaneously pouring by the two pouring pipelines to form the two rail bearing regions according to preset reinforcing fiber ratios of different regions, wherein discharging speeds of the two pouring pipelines are controlled to realize the preset reinforcing fiber ratios.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/051,787Filed 11 Jun 2018

Priority

CN 201810555647.931 May 2018

Published

29 Apr 2021

Term ends

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Classification9 codes

E01B 3/34
With armouring or reinforcement: with pre-tensioned armouring or reinforcement
B28B 1/008
Producing shaped prefabricated articles from the material: made from two or more materials having different characteristics or properties
B28B 1/523
Specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement: containing metal fibres
B28B 13/0225
Feeding the moulding material in measured quantities from a container or silo: feeding specific quantities of material at specific locations in…