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A prefabricated sleeper and its production equipment and method

A production method and sleeper technology, applied in the field of prefabricated sleepers and their production equipment, can solve problems such as increased ballast pressure and vibration acceleration, adverse effects of locomotives and vehicles running, increased track sinking, etc., to achieve improved compactness and improved Basic mechanical properties, the effect of improving strength

Active Publication Date: 2021-01-08
ANHUI ZHONGZHI RAIL TRANSPORTATION EQUIP MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of reinforced concrete sleepers are high rigidity and poor elasticity, resulting in increased pressure and vibration acceleration on the ballast bed, which intensifies the pulverization of ballast, increases the sinking of the track, and adversely affects the running part of the rolling stock

Method used

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  • A prefabricated sleeper and its production equipment and method
  • A prefabricated sleeper and its production equipment and method
  • A prefabricated sleeper and its production equipment and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A prefabricated sleeper, comprising the following raw materials in parts by weight: 90 parts of Portland cement, 50 parts of graded gravel, 110 parts of medium-coarse river sand, 60 parts of microsilica, 2 parts of steel fiber, 5 parts of basalt fiber, methyl 0.2 part of cellulose ether, 0.5 part of hydroxyalkyl starch ether, and 0.5 part of naphthalene-based superplasticizer.

[0072] Its preparation method comprises the following steps:

[0073] (1) Use automatic tensioning equipment to stretch the low-relaxation spiral rib prestressed steel wire with a diameter of 6.25mm, the tension speed is ≤80kN / s, and the limit deviation of prestressed steel wire cutting is less than 1.5 / 10000 of the length of the steel wire. The ribs, spiral ribs and sleeves are fixed in the prefabricated mould;

[0074] (2) Add the raw materials of the prefabricated sleeper into the mixing tank, add water with 25% of the total mass of the raw materials and stir for 120s to obtain the concrete ...

Embodiment 2

[0080] A prefabricated sleeper, comprising the following raw materials in parts by weight: 80 parts of Portland cement, 45 parts of graded gravel, 100 parts of medium-coarse river sand, 55 parts of microsilica, 2 parts of steel fiber, 6 parts of basalt fiber, methyl 0.5 parts of cellulose ether, or 0.2 parts of carboxymethyl starch ether, and 0.5 parts of amino superplasticizer.

[0081] Its preparation method comprises the following steps:

[0082] (1) Use automatic tensioning equipment to stretch the low-relaxation spiral rib prestressed steel wire with a diameter of 6.5mm, the tension speed is ≤80kN / s, and the limit deviation of prestressed steel wire cutting is less than 1.5 / 10000 of the length of the steel wire. The ribs, spiral ribs and sleeves are fixed in the prefabricated mould;

[0083] (2) Add the raw materials of the prefabricated sleeper into the mixing tank, add water with 30% of the total mass of the raw materials and stir for 120s to obtain the concrete slurry...

Embodiment 3

[0089] A prefabricated sleeper, comprising the following raw materials in parts by weight: 100 parts of Portland cement, 40 parts of graded gravel, 120 parts of medium-coarse river sand, 65 parts of microsilica, 3 parts of steel fiber, 3 parts of basalt fiber, methyl 0.5 part of cellulose ether, 0.2 part of cationic starch ether, and 1 part of polycarboxylate superplasticizer.

[0090] Its preparation method comprises the following steps:

[0091] (1) Use automatic tensioning equipment to stretch the low-relaxation spiral rib prestressed steel wire with a diameter of 6.25mm, the tension speed is ≤80kN / s, and the limit deviation of prestressed steel wire cutting is less than 1.5 / 10000 of the length of the steel wire. The ribs, spiral ribs and sleeves are fixed in the prefabricated mould;

[0092] (2) Add the raw materials of the prefabricated sleeper into the mixing tank, add water with 20% of the total mass of the raw materials and stir for 150s to obtain the concrete slurry;...

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Abstract

The invention discloses a prefabricated sleeper and production equipment and method thereof. The prefabricated sleeper comprises the following raw materials, in parts by weight, 80 to 100 parts of Portland cement, 40 to 60 parts of coarse aggregate, 80 to 120 parts of fine aggregate, 50 to 70 parts of silica fume, 5 to 10 parts of anti-crack fiber, 0.2 to 1 part of methyl cellulose ether, 0.2 to 1part of starch ether and 0.5 to 2 parts of a water reducing agent. The production equipment of the prefabricated sleeper comprises a mounting frame, a stirring workbench, a stirring barrel, a vibration table, a placement plate, a prefabricated mold, a pressurizing cover, a pressurizing mechanism and a controller. According to the prefabricated sleeper, the silica fume and the anti-crack fiber inthe raw materials are combined for use, the anti-crack performance of the prefabricated sleeper is remarkably improved, concrete slurry can be rapidly and accurately injected into the prefabricated mold through the production equipment and the production method, the compactness of the prefabricated sleeper is further improved through common vibration and pressurized vibration, and the comprehensive performance of the prefabricated sleeper finished product is improved.

Description

technical field [0001] The invention relates to the field of prefabricated sleepers, in particular to a prefabricated sleeper and its production equipment and method. Background technique [0002] Sleepers, also known as sleepers, are also a kind of railway accessories. It's just that the material used is not just wood, so it is more scientific to call sleepers. The sleeper not only supports the rail, but also maintains the position of the rail, and also transmits the huge pressure transmitted by the rail to the track bed. It must have a certain degree of flexibility and elasticity, neither hard nor soft. When the train passes by, it can be properly deformed to cushion the pressure, but after the train has passed, it has to restore its original shape as much as possible. With the reduction of forest resources and the enhancement of people's awareness of environmental protection, and of course because of the development of science and technology, at the beginning of last c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B23/04B28B3/02B28B1/087B28B11/24B28C5/14C04B28/04C04B14/48C04B14/46C04B18/14C04B111/20
CPCB28B1/0873B28B3/022B28B11/245B28B23/04B28C5/14B28C5/148C04B28/04C04B40/0039C04B2111/2038C04B14/02C04B14/068C04B18/146C04B14/48C04B14/4656C04B24/383C04B24/38C04B24/226C04B2103/302Y02W30/91
Inventor 杜志文
Owner ANHUI ZHONGZHI RAIL TRANSPORTATION EQUIP MFG CO LTD
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