A ballastless track pretensioned prestressed track slab
A ballastless track and track slab technology, which is applied in the field of track slabs, can solve the problems of affecting the service life of track slabs and increasing the stiffness of track slabs, and achieve the effects of improving production efficiency, improving stiffness, and saving raw materials
Inactive Publication Date: 2011-12-28
CHINA RAILWAY 23RD CONSTR BUREAU LTD +1
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Problems solved by technology
However, through engineering practice, it has been found that when the track slab is installed, the support layer between the track slab and the roadbed is replaced by the self-compacting concrete with better performance, so that the support layer and the track slab form a composite slab structure. The stiffness of the track slab itself increases, which affects the service life of the track slab
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[0033] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.
[0034] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.
[0035] Such as Figure 2 to Figure 8 As shown, a pre-tensioned prestressed track slab for a ballastless track includes a track slab body 1, and a groove 3 is provided at the longitudinal end of the track slab body 1, and the longitudinal end is image 3 The left and right end surfaces of the board body, the grooves 3 at the two longitudinal ends of the board body are arranged symmetrically with respect to the transverse centerline 1-1 of the ...
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Abstract
The invention discloses a pre-tensioned prestressed track slab for a ballastless track, belonging to the technical field of track slabs for a ballastless track. The grooves are arranged symmetrically with respect to the transverse center line of the panel body, and the pre-tensioned longitudinal prestressed reinforcement is arranged in the panel body, and the pre-tensioned longitudinal prestressed reinforcement bar is closely combined with the concrete in the panel body, and the pre-tensioned longitudinal prestressed reinforcement bar is opposite to It is arranged symmetrically on the longitudinal center line of the slab; since the slab will be filled with self-compacting concrete under the slab when it is in use, the structural stress system of the slab has undergone essential changes. Compared with the original track slab, the present invention cancels the transverse post-tensioning prestress The steel bar saves raw materials, simplifies the manufacturing process, and reduces the cost of the track slab; more importantly, it improves the stiffness of the track slab and increases the longitudinal ductility and crack resistance of the track slab. The use of pre-tensioned prestressed steel bars can make the prestressed steel bars and the slab concrete have a greater grip force, so that the overall performance of the track slab is improved.
Description
technical field [0001] The invention relates to a track plate for installing a ballastless track rail, in particular to a novel track plate applied on a ballastless track. Background technique [0002] The internal prestressed steel bars of the track slabs currently used for ballastless tracks are provided with transverse and longitudinal post-tensioned prestressed steel bars (such as figure 1 shown), figure 1 The longitudinal prestressed steel bar 1' is installed in the longitudinal anchor hole 2' of the longitudinal end face of the plate body, the transverse prestressed steel bar 4' is installed in the transverse anchor hole 3' of the transverse end face of the plate body, and the horizontal and longitudinal steel bars are arranged in layers so that The stress distribution of the plate body is uniform, thereby improving the rigidity of the plate body. However, through engineering practice, it has been found that when the track slab is installed, the support layer between...
Claims
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Inventor 钱振地王清明税卓平贾志武鲁宁生陈幼林王红亮翟勇林晓波刘延龙喻丕金沈德华杜新立邱江于晓明张天明
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD