CN2173271Y

CN2173271Y - Preload stress concrete rail sleeper

Info

Publication number: CN2173271Y
Application number: CN 93246896
Authority: CN
Inventors: 林之珉; 范佳; 刘承辕; 王新桂; 江朋友; 朱伟民; 刘汉亨
Original assignee: Shanghai Railway Administration Nanchang Engineering General Corp Guixi Bridge Factory
Current assignee: Shanghai Railway Administration Nanchang Engineering General Corp Guixi Bridge Factory
Priority date: 1993-12-10
Filing date: 1993-12-10
Publication date: 1994-08-03
Anticipated expiration: 2003-12-10

Abstract

The utility model relates to a preload stress concrete sleeper whose length is L=2600 mm, height of the cross section below the rail is h 1 =230 mm, upper width of the cross section below the rail is B1 =170 mm, lower width is of the cross section below the rail B2 =300 mm, height of the intermediate cross section is h 2 =185 mm, upper width of the intermediate cross section is b 1 =206 mm, lower width of the intermediate cross section is b 2 =280 mm, lengthwise reinforcing bars are 10 impression steel bars of phi 7 mm and 15 lateral hoops are made of plain reinforcing steel bars of phi 6 mm. When a fastener sleeper without screw bolts are made, the iron part of the fastener is needed to be previously buried in a rail slot without a shoulder block.

Description

Preload stress concrete rail sleeper

The TK-III type prestressed reinforced concrete tie series concrete building unit technical field that is used for heavy duty, high-speed track.

At present, the prestressed reinforced concrete tie that China railways extensively adopts is the II type pillow that shoulder block is arranged, and is provided with the bolt preformed hole in the rail support groove, and its arrangement of reinforcement has two kinds of the steel wire of 44 φ 3mm and 4 φ 10mm reinforcing bars, and the ultimate strength of steel wire and reinforcing bar is 1470N/mm ², establish 9 lateral ties in the sleeper, be provided with spiral bar around the preformed hole, concrete design strength is No. 600, adopts the prestressing force pre-tensioning system to carry out continuous productive process production.But this class sleeper is applied on heavy type, the high-speed track, the vertical, horizontal crack appears prematurely because bearing capacity is on the low side, bolt hole through crack and other damages not only influence its application life but also have strengthened maintenance load, the needs of obviously incompatible heavy duty and high speed operation condition.

The purpose of this utility model provide a kind of the track bulk strength and stable aspect the new type concrete sleeper that can satisfy Heavy-Haul Railway, at a high speed run needs.

Design of the present utility model is the actual conditions of bearing dynamic load according to sleeper in orbit, adopt comprehensive dynamic load factor to determine the design load of sleeper, carry out the concrete sleeper design in view of the above, its key dimension and technical performance such as subordinate list are listed, compare its supporting capacity with existing II type pillow and are greatly improved.

Appearance and size of the present utility model: the long L=2600mm of sleeper, the high h of rail lower section ₁=230mm, the high h in intermediate cross-section ₂=185mm, wide B on the rail lower section ₁=170mm, following wide B ₂=300mm, wide b on the intermediate cross-section ₁=206mm, following wide b ₂=280mm.It is about 17% that this increases the existing pillow floor space of pillow bottom support area, and resting the head on distolateral area increases by 20%, and weight increases by 28%, can effectively improve the vertical, horizontal resistance of railway roadbed, and the accumulated deformation that slows down railway roadbed improves the resistance to overturning of track.Longitudinal reinforcement of the present utility model adopts the impression reinforcing bar of 10 φ 7mm, and heading is made in its end, and ultimate tensile strength reaches 1570N/mm ², in the sleeper length range, establish 15 lateral ties, make with the plain steel-bar of φ 6mm.

When the utility model was made non-bolt fastener sleeper, the ironware of its fastener will be embedded in the rail groove of non-shoulder, when having made bolt fastener sleeper, needed prepared screw-bolt hole in the rail groove of shoulder block is arranged.

Project	Unit	TK-III type pillow	Existing II type pillow	Relative ratio (II/III)
					Length of sleeper	cm	260	250
Under the depth of section rail/centre	cm	23／18.5	20/16.5
					Under the breadth of section rail/centre	cm	30/28	28/25
Pillow clothing bearing area	cm ²	7720	6588	0.85
					Rest the head on distolateral area	cm ²	590	490	0.83
Weight	kg	320	250	0.78
					The presstressed reinforcing steel consumption	kg	7.85	6.11	0.78
Design rail power rail is middle down	kN·m kN·m	19.0 －17.3	13.3 —10.5	0.70 0.61

Provide embodiment below in conjunction with accompanying drawing:

Fig. 1 is a front view; Fig. 2 is a vertical view; Fig. 3 is a bottom view; Fig. 4 is the main sectional view that bolt fastener pillow is arranged; Fig. 5 is the sectional view of bowing that bolt fastener pillow is arranged; Fig. 6 is the cross-section sectional view of sleeper.Among the figure: the pre-buried fastener of 1-; The 2-concrete; The 3-stirrup; The 4-longitudinal reinforcement; The 5-prepared screw-bolt hole.

When the utility model is made, to in punching block, be fixed on the end plate with the longitudinal reinforcement (4) of heading earlier by design attitude, again pre-buried fastener (1) is placed in desired location, tension reinforcing steel bar, concrete perfusion (2) and carry out vibration compacting then, send into the health kiln and add steam curing, when concrete reaches predetermined strength, loosen the reinforcement stresses demoulding and promptly make this kind sleeper.If need erection bolt, only need before the spiral bar and the plug of prepared screw-bolt hole (5) to be placed in desired location and to make the rail groove of shoulder block by mold form, just make the sleeper of bolt fastener at tension reinforcing steel bar (4).

Claims

1, a kind of prestressed reinforced concrete tie that improves track bulk strength and stability is characterized in that: the long L=2600mm of sleeper, the high h of rail lower section ₁=230mm goes up wide B ₁=170mm, following wide B ₂=300mm, the high h in intermediate cross-section ₂=185mm goes up wide b ₁=206mm, following wide b ₂=280mm, longitudinal reinforcement are the impression reinforcing bar of 10 φ 7mm, and heading is made in its end, are provided with 15 lateral ties made from φ 6mm plain steel-bar in the sleeper length range.

2, prestressed reinforced concrete tie according to claim 1, it is characterized in that: when making non-bolt button sleeper, the ironware of its fastener will be embedded in the rail groove of non-shoulder, when being manufactured with bolt fastener sleeper, needs prepared screw-bolt hole in the rail groove of shoulder block is arranged.