CN104530577A - Rubber sleeve for blocking precast box beam for high-speed rail and application method of rubber sleeve - Google Patents

Abstract

The invention discloses a rubber sleeve for blocking a precast box beam for a high-speed rail. The rubber sleeve comprises the following raw materials: ethylene propylene terpolymer, zinc oxide, sulphur, stearic acid, oil furnace process carbon black, ASTM103# oil, a TMTD accelerant and an M accelerant. The finished rubber sleeves are in a circular ring or a long ring structure; the outer surfaces are in an arc form; the inner surfaces are in a structure of a trumpet opening which inclines 2-6.5 degrees. When the rubber sleeve is used, an anchor recess template punched with holes are cleaned; circular rubber sleeves sleeve reserved hole pipes; long-ring rubber sleeves sleeve the reserved hole pipes which are formed by three-circle horizontal arrangement and connection of the lower part of the template; and the anchor recess template is subjected to anchor recess pouring. The rubber sleeve has the advantages of being simple in structure, convenient to use, and outstanding in effect; an anchor recess can be pulled out after being poured with concrete to initially set; the construction period of the precast box beam is shortened; and when the blocking concrete is poured, the blocking concrete can be embedded into a groove after being solidified due to the annular groove formed by the rubber sleeve, so that the blocking quality is ensured.

Description

High ferro prefabricated case beam end-blocking rubber coating and using method thereof

Technical field

The present invention relates to high ferro prefabricated case beam, especially relate to a kind of high ferro prefabricated case beam end-blocking rubber coating, the invention still further relates to the using method of this rubber coating in the construction of high ferro prefabricated case beam end sealing off and covering anchorage.

Background technology

Along with the develop rapidly of railway construction in China, high ferro engineering design and construction state of the art is improving constantly, Bridge Types is also more complicated various, prefabricated case beam is slim and graceful with its structure, building height is little, arrangement of reinforcement is few, compare the advantages such as construction of cast-in-situ box-beam speed is quick, generally uses in high-speed rail bridge.Simultaneously, along with the quickening of China Express Railway and PDL Construction speed and scale expand gradually, to introducing new technology in construction process, the demand of novel process also increases day by day, make great efforts to seek the technical measures that various reduction consumes, the novel process, new technology, novel material etc. of raising work efficiency reduce costs, amplification input and output price scissors, accelerating construction progress become each construction enterprises' urgent problem.Be adopt anchor recess concrete dabbing technology during the anchor recess end-blocking of existing prefabricated case beam prestress end, namely after dismounting end mould, first by the inner side dabbing of anchor recess, and then pour into a mould sealing off and covering anchorage concrete.

Prefabricated case beam through the method process is erected at after on high ferro railway, because operating vibration very easily causes anchor recess sealing off and covering anchorage concrete to ftracture in case beam end, serious even can drop out, and sealing off and covering anchorage concrete is once cracking, namely steam can enter case beam internal corrosion reinforcing bar from cracking, cannot ensure the working life of high ferro prefabricated case beam.

Summary of the invention

The object of the present invention is to provide a kind of high ferro prefabricated case beam end-blocking rubber coating, the present invention also provides the using method of this rubber coating in the construction of high ferro prefabricated case beam end sealing off and covering anchorage.

For achieving the above object, the present invention can take following technical proposals:

High ferro prefabricated case beam end-blocking rubber coating of the present invention, its parts by weight of raw materials consists of: terpolymer EP rubber 100 parts, 5 parts, zinc oxide, 1.5 parts, sulphur, stearic acid 1 part, Audit For Process carbon black 80 ~ 100 parts, ASTM103 oil 50 ~ 75 parts, TMTD promotor 1 part and M promotor 0.5 part; Described finished product rubber coating is annular or long ring structure, and outside surface is circular arc, and internal surface is 2 ° ~ 6.5 ° bell-mouth structure of airs tilted; The physicals of described finished product rubber coating is: hardness (Shao Er A) 60 ± 5 degree, tensile strength >=17Mpa, tensile yield >=380%, temperature limit of brittleness≤-50 DEG C, compression set (70 DEG C × 24h)≤30, resistance to ozone ageing (20% extends, 40 DEG C × 96h) 25pphm is without be full of cracks; 70 DEG C, under 168h condition, tensile strength reduced rate 15%, tensile yield reduced rate 20%, changes in hardness-5 ~+10 IRHD.

The using method of rubber coating of the present invention in the construction of high ferro prefabricated case beam end sealing off and covering anchorage is:

First the anchor recess template of accomplishing fluently hole is cleaned out, according to the actual arrangement position of pre-opened hole pipe in anchor recess template, the annular rubber cover that internal surface obliquity and pre-opened hole pipe conicity match is set on each pre-opened hole pipe, the rubber coating of long ring structure is sleeved on anchor recess template bottom and becomes on the horizontal each group of pre-opened hole pipe be connected of three circles; Then anchor recess cast is carried out in end anchor recess template being fixed on prefabricated case beam;

After concrete initial set to be cast, remove anchor recess template, the rubber coating be retained in each anchor recess of case beam end is levered up by crowbar respectively, and artificial hand can stay next annular recesses after shutting down on each anchor recess sidewall;

When carrying out the end-blocking concrete construction of case beam, first by anchor recess sidewall dabbing, start to build after broken for concrete in anchor recess end is cleaned out, to build after the end-blocking concrete setting of anchor recess in embedded rings connected in star, and form one-piece construction between case beam, finally according to a conventional method case beam end is processed.

The invention has the advantages that structure is simple, easy to use, remarkably productive.Rubber coating adopt terpolymer EP rubber (terpolymer EP rubber is ethene, the terpolymer of propylene and non-conjugated diene hydrocarbon), sulphur, zinc oxide, stearic acid, Audit For Process carbon black, promotor etc. in proportion sulfuration form ,there is excellent ageing resistance, ozone resistance, weathering resistance, thermotolerance (can use for a long time in 120 DEG C of environment), chemical resistant properties (as alcohol, acid, highly basic, oxygenant).Meanwhile, terpolymer EP rubber also has outstanding resistance to steam performance, can resist the viscous deformation occurred because vapor temperature is too high when prestress box beam winter construction.

In practice of construction, rubber coating simple installation, easy handling, can extract, can shorten the construction period of prefabricated case beam after the initial set of anchor recess deposit concrete; Simultaneously stable molding, during cast end-blocking concrete, can conveniently technique pour into a mould after anchor recess wall dabbing, but the annular recesses formed due to rubber coating, embed after end-blocking concrete setting can be made in groove, ensure that end-blocking quality; And finished product rubber coating can bundledly be stacked, transport is preserved all very convenient, and meanwhile, this rubber coating can reach 100 ~ 200 times more than by Reusability, very economical practicality.

Accompanying drawing explanation

Fig. 1 is the use schematic diagram of rubber coating of the present invention.

Embodiment

High ferro prefabricated case beam end-blocking rubber coating of the present invention, be by raw material terpolymer EP rubber 100 parts, 5 parts, zinc oxide, 1.5 parts, sulphur, stearic acid 1 part, Audit For Process carbon black 80 ~ 100 parts, ASTM103 oil 50 ~ 75 parts, TMTD promotor 1 part and M promotor 0.5 part in proportion sulfuration form; Due to the single spread configuration of pre-opened hole pipe of anchor recess template both sides, and the pre-opened hole pipe triad spread configuration of bottom, so finished product rubber coating is divided into cirque structure and long ring structure, the outside surface of rubber coating is arc-shaped structure, and internal surface is 2 ° ~ 6.5 ° bell-mouth structure of airs tilted; The physicals of finished product rubber coating sees the following form:

。

The using method of rubber coating of the present invention in the construction of high ferro prefabricated case beam end sealing off and covering anchorage is as follows:

First the anchor recess template 1 of accomplishing fluently hole is cleaned out, according to the actual arrangement position of pre-opened hole pipe 2 in anchor recess template 1, the annular rubber that internal surface obliquity and pre-opened hole pipe conicity match is overlapped 3 to be set on each pre-opened hole pipe, long ring-shaped rubber cover 4 being sleeved on anchor recess template 1 bottom becomes on the horizontal each group of pre-opened hole pipe be connected of three circles, for avoiding rubber coating slippage when pouring into a mould, available binding is fixed in 1/3 position of pre-opened hole pipe; Then anchor recess cast is carried out in end anchor recess template 1 being fixed on prefabricated case beam;

After the initial set of anchor recess deposit concrete, remove anchor recess template 1, the rubber coating be retained in each anchor recess of case beam end is levered up by crowbar respectively, and artificial hand is separately deposited (reusable) after shutting down, and can stay next annular recesses like this on each anchor recess sidewall;

When carrying out the end-blocking concrete construction of case beam, first by anchor recess sidewall dabbing, start to build after broken for concrete in anchor recess end is cleaned out, at this moment meeting embedded rings connected in star interior (good fixed action can be played after the concrete setting in annular recesses) after the end-blocking concrete setting of anchor recess is built, like this, just one-piece construction is formed between the end-blocking concrete of cast and case beam.After form removal, by end-blocking concrete dabbing, adopt high-strength cement mortar to wipe one's face press polish, and paste with plastics film, carry out moisturizing, insulation, finally at beam-ends brushing waterproof paint.

Complete use during rubber coating of the present invention construction, join sufficient rubber coating according to the number of the reserved pore in the anchor recess template used corresponding to case beam type number, owing to repeatedly using, so cost is not high, but actual effect is very outstanding.

Claims (2)

1. a high ferro prefabricated case beam end-blocking rubber coating, is characterized in that: the parts by weight of raw materials of described rubber coating consists of: terpolymer EP rubber 100 parts, 5 parts, zinc oxide, 1.5 parts, sulphur, stearic acid 1 part, Audit For Process carbon black 80 ~ 100 parts, ASTM103 oil 50 ~ 75 parts, TMTD promotor 1 part and M promotor 0.5 part; Described finished product rubber coating is annular or long ring structure, and outside surface is circular arc, and internal surface is 2 ° ~ 6.5 ° bell-mouth structure of airs tilted; The physicals of described finished product rubber coating is: hardness (Shao Er A) 60 ± 5 degree, tensile strength >=17Mpa, tensile yield >=380%, temperature limit of brittleness≤-50 DEG C, compression set (70 DEG C × 24h)≤30, resistance to ozone ageing (20% extends, 40 DEG C × 96h) 25pphm is without be full of cracks; 70 DEG C, under 168h condition, tensile strength reduced rate 15%, tensile yield reduced rate 20%, changes in hardness-5 ~+10 IRHD.

2. the using method of rubber coating according to claim 1 in the construction of high ferro prefabricated case beam end sealing off and covering anchorage, is characterized in that:

First the anchor recess template of accomplishing fluently hole is cleaned out, according to the actual arrangement position of pre-opened hole pipe in anchor recess template, the annular rubber cover that internal surface obliquity and pre-opened hole pipe conicity match is set on each pre-opened hole pipe, the rubber coating of long ring structure is sleeved on anchor recess template bottom and becomes on the horizontal each group of pre-opened hole pipe be connected of three circles; Then anchor recess cast is carried out in end anchor recess template being fixed on prefabricated case beam;

After concrete initial set to be cast, remove anchor recess template, the rubber coating be retained in each anchor recess of case beam end is levered up by crowbar respectively, and artificial hand can stay next annular recesses after shutting down on each anchor recess sidewall;

When carrying out the end-blocking concrete construction of case beam, first by anchor recess sidewall dabbing, start to build after broken for concrete in anchor recess end is cleaned out, to build after the end-blocking concrete setting of anchor recess in embedded rings connected in star, and form one-piece construction between case beam, finally according to a conventional method case beam end is processed.