A method for replacing track slabs after horizontally drawing steel rails
A technology for track slabs and rails, which is applied in the field of replacement of damaged track slabs in slab-type ballastless track structures, and can solve problems such as unsuitable construction time for skylights, heavy tooling, and inability to replace track slabs in ultra-high curve sections.
Active Publication Date: 2019-03-29
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +2
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Problems solved by technology
This method avoids the damage to the rail by the "rail cutting and replacement method", but the disadvantages are that the tooling is heavy and the process is complicated, and it is not suitable for the construction of the skylight time. Carry out track slab replacement in super high section of curve
The patent "a subway board changing car and a board changing unit including the subway board changing car (201420251605.3)" also has the problem of large-scale and complicated equipment, which is not suitable for skylight construction
Method used
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Embodiment 1
[0021] Embodiment 1: The embodiment of the present invention provides a method for replacing a track plate of a CRTS type slab ballastless track structure, and the method includes the following contents:
[0022] (1) Fix the "T" shaped block on the convex block on both sides of the plate to be replaced by planting ribs. Before planting the bars, check the steel bar layout of the convex block to avoid damage to the steel bars when planting the bars. The "T" shaped block is welded with a steel plate with a length of 30cm and a width of 30cm and a steel plate with a length of 30cm and a height of 15cm, and the thickness of the steel plate is 1cm.
[0023] (2) The measured rail locking temperature is 31.2°C, and the actual measured temperature of the rail is 12.5°C. The difference between the two is 18.7°C.
[0024] (3) For CRTS type I slabs, the lateral pullout amount is 60cm.
[0025] (4) According to the temperature difference and the amount of lateral pullout, the loosening...
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The invention discloses a system and method for replacement of a track plate after transverse steel rail pulling. The system comprises steel rail actual locking rail temperature and current rail temperature testing equipment, steel rail stress strain testing equipment, steel rail transverse pushing equipment, track plate transportation equipment, track plate hoisting equipment, a measuring device, a rail steel return-pulling device. The method comprises the steps that a counter force stop block or a counter force device is arranged at a line by a certain distance from the front and the back of the to-be-replaced track plate, pushing points are arranged on the steel rail, a certain length of fastener is loosened, the steel rail is pushing to the outer side of the to-be-replaced track plate by adopting the pushing equipment, and removing of the used plate and in-position arrangement of a new plate are conducted by adopting a vertical hoisting mode. The stress testing equipment measures stress of the steel rail in the whole process; the measuring device is arranged at the outer side of the plate hoisting operation zone to control plane position of the new plate. The system and method have the characteristics that tools are light and convenient, replacement is rapid, working efficiency is high, damage to the steel rail is small, and the system and method are particularly suitable for 'skylight time' operation.
Description
technical field [0001] The invention belongs to the technical field of high-speed railway track structure disease treatment, and specifically refers to a method for replacing damaged track slabs of a slab-type ballastless track structure. Background technique [0002] In recent years, high-speed railway has developed rapidly in our country. For lines with an operating speed of 250km / h, ballastless track structures are used. As the main force in the ballastless track structure, the slab ballastless track structure (CRTSⅠ, CRTSⅡ, CRTSⅢ) has been widely used in the construction of high-speed railways in my country. The slab ballastless track structure is mainly composed of steel rails, fasteners, track slabs, mortar (self-leveling concrete) filling layers, and concrete bases. As a reinforced concrete structure, under the action of the environment and train loads, the track slab will inevitably be deteriorated and destroyed. High-speed rail operating lines are faced with the n...
Claims
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IPC IPC(8): E01B29/00
CPCE01B29/00
Inventor 郑新国刘竞谢永江程冠之冯仲伟曾志李书明董全霄翁智财朱长华杨德军刘相会潘永健王月华周骏
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI