CN2265882Y - Short steel model for prestressed concrete sleeper - Google Patents

Abstract

The utility model relates to a short steel model for prestressed concrete sleepers, which is fixed by a steel mould shell, a main beam and an end beam into a whole. The steel mould shell adopts a 4*1 parallel permutation form to form a best size project. Prestretching machines are arranged at both ends of the steel mould shell, before stretching, an anchorage plate is arranged in the steel mould in advance, both ends of the steel bar are fixed to the anchorage plate, and the prestretching machine is stretch the anchorage plates respectively. The utility model solves the problem of stress nonuniform in the process of loading and unloading of prestress. Simultaneously, the anchorage plate stays in the concrete sleeper forever, the utility model improves the binding power of concrete and steel bar, and the utility model guarantees the quality of concrete sleepers.

Description

A kind of short steel model of prestressed reinforced concrete tie

The utility model relates to a kind of model of producing prestressed reinforced concrete tie, especially for producing the short steel model that adapts to heavy duty, used for high-speed railway prestressed reinforced concrete tie, belongs to concrete component punching block technical field.

At present, China railways extensively adopts long steel model to produce sleeper, and the method for employing is once a pretensioned steel in groups, concrete perfusion moulding then.Long steel model is that five pairs of sleeper moulds are vertically arranged all-in-one-piece sleeper model, and the stretch-draw machine is established at two ends, and the reinforcing bar of vertical five sleeper moulds is unified stretch-draw by the stretch-draw machine, concrete perfusion moulding then.Concrete in reinforced concrete structure and reinforcing bar are two kinds of materials that mechanical property difference is very big, so their can co-operation be that the power of cohesive force directly influences the quality of concrete component because the existence of cohesive force can not freely be slided both relatively.Long steel model is difficult to guarantee enough cohesive forces, and the sleeper of being produced is applied on heavy duty, the high-speed track, because bearing capacity is on the low side, occurs vertical or horizontal crackle easily too early, the needs of incompatible heavy duty, high speed operation condition.

The purpose of this utility model provides the novel sleeper of a kind of suitable production, in advance stretch-draw prestressing force evenly and can meet the demands, unloading is convenient in demoulding with sleeper, and simple in structure, be easy to the supporting use of miscellaneous equipment, can produce bulk strength with stable aspect all satisfy the short steel model that the heavy duty high speed is runed the prestressed reinforced concrete tie of requirement.

The purpose of this utility model is achieved in that the actual conditions of bearing dynamic load according in the quality requirement of novel sleeper and the production process, adopt stress coefficient to determine the punching block design load, carry out the structure of steel die design in view of the above, 4 the stamping forming punching block housing of integral body parallel arranged, and evenly be fixed in the clamping of 5 girders of vertically arranging, two ends are with the fixing weak point steel model overall structure that forms of end carriage, its key dimension is that model length is 2786mm, width is 1500mm, highly be 310mm, vertical 5 girder thickness are 24mm, 2 butt cantilever thickness are 50mm, on every butt beam, be provided with the prestressing force pulling eye of 16 Φ 23, two ends end carriage arranged outside stretch-draw machine, can be respectively the reinforcing bar of punching block be carried out stretch-draw, anchor plate is put at the reinforcing bar two ends in advance in the punching block housing, the reinforcing bar two ends are fixed on the steel plate, stretch-draw machine piecemeal stretch-draw steel plate only during pretensioning, play the effect of tension reinforcing steel bar, anchor plate is forever stayed in the sleeper after the concrete perfusion moulding, no anchor plate sleeper exists deformed bar and the bad drawback of concentrating with prestressing force of concrete binding power, thereby influence the structural behaviour and the durability of sleeper, and short steel model band anchor plate can make prestressing force be delivered to concrete section effectively, overcome the defective of long steel model, improve the sleeper performance, thereby can satisfy heavy duty, the high speed operation condition is to the requirement of sleeper quality.

The advantage of the short steel model of said structure is: because the punching block housing is arranged rationally, mainly solved concrete sleeper in process of production prestressing force load and uninstall process in the problem of unbalanced stress, short steel model adopts the way that unloads respectively by stress loss numerical value when adding the stretch-draw of anchor plate root division, unloading, overcome because of the deformed bar error in length and the situation of putting the unbalance stress that a time difference causes, guarantee the cohesive force of concrete and reinforcing bar, thereby guaranteed the quality of every sleepers.

Concrete structure of the present utility model is provided by the following example and accompanying drawing.

Fig. 1 is a schematic top plan view of the present utility model;

Fig. 2 is that schematic diagram is looked on the left side of Fig. 1;

Fig. 3 is the A-A sectional schematic diagram of Fig. 1;

Fig. 4 is the B-B local section schematic diagram of Fig. 1.

The utility model is by four stamping forming punching block housing 4 parallel arranged of integral body, and evenly be fixed in the clamping of five girders of vertically arranging 3, two ends are with the end carriage 1 fixing weak point steel model overall structure that forms, whole key dimension is: length is 2786mm, width is 1500mm, highly be 310mm, girder 3 thickness are 24mm, end carriage 1 thickness is 50mm, every butt beam 1 is provided with the prestressing force pulling eye 5 of 16 Φ 23, and end carriage arranged outside stretch-draw machine in two ends is to the stretch-draw of going ahead of the rest of reinforcing bar in the punching block, anchor plate 6 is put at the reinforcing bar two ends in advance in the punching block housing 4, the reinforcing bar two ends are fixed on the anchor plate 6, and stretch-draw machine piecemeal stretch-draw anchor plate 6 plays the effect of tension reinforcing steel bar during pretensioning, anchor plate 6 is forever stayed in the sleeper after the concrete perfusion moulding, rail frid 7 is set during concrete perfusion in the punching block 4 on built-in fitting preformed hole 2.

Claims (2)

1, a kind of short steel model of prestressed reinforced concrete tie, fix as a whole by punching block housing, girder, end carriage, it is characterized in that: 4 stamping forming housing parallel arranged of integral body, be fixed in the clamping of 5 girders of vertically arranging and two ends 2 butt beams, form the overall structure of short steel model, its key dimension is: length is 2786mm, width is 1500mm, highly be 310mm, girder thickness is 24mm, end carriage thickness is 50mm, establishes the prestressing force pulling eye of 16 Φ 23 on every butt beam.

2, short steel model according to claim 1, it is characterized in that: when making sleeper, respectively at pre-buried anchor plate in the punching block housing, the reinforcing bar two ends are fixed on the anchor plate, the pre-stretch-draw anchor plate of stretch-draw machine, anchor plate is forever stayed in the sleeper after the moulding of concrete perfusion sleeper.

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