CN110306791A - Superelevation clear-water concrete independence cylinder construction method - Google Patents

Abstract

The invention discloses a kind of superelevation clear-water concrete independence cylinder construction methods, including support system construction, template construction, reinforcement engineering construction, concrete engineering construction.The present invention is easy for construction, and construction effect is good.Pillar overall height verticality maximum deviation only 4mm.

Description

Superelevation clear-water concrete independence cylinder construction method

Technical field

The present invention relates to a kind of superelevation clear-water concrete independence cylinder construction methods.

Background technique

It in the construction of concrete independence cylinder, due to column single layer height superelevation, and is independent cylinder, column is away from big, therefore cylinder Template system design requirement is high, not only to guarantee the flatness and verticality of cylinder, more to guarantee that shuttering supporting goes along with sb. to guard him reinforcing body The stability of system.This brings very big difficulty to the binding and concreting of reinforcing bar.

Summary of the invention

The purpose of the present invention is to provide a kind of superelevation clear-water concrete independence cylinder construction parties easy for construction, effect is good Method.

The technical solution of the invention is as follows:

A kind of superelevation clear-water concrete independence cylinder construction method, including support system construction, template construction, reinforced bar engineering are applied Work, concrete engineering construction, it is characterized in that:

The support system construction: colonnade uses full hall scaffold support system, and upright bar is along beam span direction spacing 0.5m, upright bar It is 0.1m, upright bar step pitch 1.5m, board bottom load-bearing upright bar horizontal spacing or array pitch 0.9m, beam that upper end, which extend out to shuttering supporting point length, Two sides upright bar spacing 0.9m；It is 1 that beam bottom, which increases load-bearing upright bar radical, and when beam section >=400, beam bottom sets 2；Upright bar is using double Fastener load-bearing connection type；All high-supported formwork bottom of upright rod need to be laid with elongated scaffold board, if vertically and horizontally sweeping the floor bar, beam bottom direction Bridging need to be set, sets horizontal cross brace every four steps；Independent pillar surrounding adds flitch four of 5 × 10cm, then every 50-150cm distances fix flitch with steel pipe, and are connected with framed bent around, are formed whole；

The template construction includes:

(1) template processing and fabricating

Cylinder is using wooden circle template of being formed, and by template, factory is made；Form is two semicircles, standard knot monolithic length 3m, mould Plate plate thickness 18mm, plastic sealing strip are concave-convex slot form, so that piece is combined closely, prevent running pulp, spillage, had made concrete demoulding both It is fast and beautiful, while playing the role of stabilization and reinforcement again；Template is reinforced every 20-30mm using steel band from top to bottom；

(2) assembly of column mould with install

Live sectional is carried out into cylindrical surface entirety, about 6m every section high according to different pillar heights；Tower is used in tower crane lifting range Lifting is installed in place, hang less than position sling and be buckled on the pillar reinforcement cage skeleton bound with truck crane；Before molding Carefully cleaning template on the inside of, first polished with coarse sandpaper, after polished with fine sandpaper, and uniformly apply rinse colourless release agent, form joint The case where processing is tight, and the full coat butter in tongue and groove both protects tongue and groove, is also prevented from running pulp, spillage generation；Template is every It is secondary be used in turn should all carry out comprehensively check correction and polishing grinding it is primary；

The reinforcement engineering construction major measure is as follows:

(1) strict control steel bar matching processing dimension is specially arranged steel bar meter place, all straightening, cutting, bending, molding, The processes such as mantle fiber are all made of mechanical equipment processing and first have to check lower material list various reinforcing bar ruler to control formed reinforcing steel bars size It is very little, the several stirrups of elder generation's preprocessing and compact dimensions are checked when processing, are caused machining deviation to adjust bar bending adjusted value, are determined It can batch machining production after errorless；For the circularity for guaranteeing framework of steel reinforcement, longitudinally spaced 2m increases in cylinder framework of steel reinforcement One of φ 16 positions stirrup, and positioning stirrup forms on mold, weld, and on periphery by the distributing position φ of column main reinforcement 6 short muscle weld main reinforcement positioning card, strictly hold steel bar matching pass, conscientiously press figure ingredient, close inspection ingredient size, conscientiously by figure Paper review, for cover to reinforcement in addition to meeting design main reinforcement protective layer and requiring, the protective layer of stirrup distribution presses code requirement control System is being not less than 15mm, prevents crack occur along stirrup when concrete shrinkage；

(2) according to design requirement, the connection type of main reinforcement is upsetting straight, can guarantee connector in this way for splice and binding The density of reinforcing bar does not increase in range, guarantees that reinforcement location is accurate, is not subjected to displacement, and the tied silk of reinforcing bar binding should be folded to reinforcing bar Among frame, to prevent because concrete surface is polluted in corrosion after being folded to outside exposing surface；

(3) prevent the measure of reinforcement displacement from ensuring that reinforcing bar position of taking root is accurate: by column position look in look for circle, and find out main reinforcement spacing, It is bound with sole plate or floor reinforcing bar and spot welding is fixed, guarantees main reinforcement position accurately and does not move；

(4) it prevents reinforcing bar when casting concrete from shifting: accurate location should be adjusted to before the binding of column muscle, accomplish vertical up and down, protective layer Using dedicated high-strength cement cushion block, uniform, unified arrangement, to guarantee the thickness of protective layer；

The concrete engineering construction:

(1) preparation of concrete:

The raw material cement of clear-water concrete: same to brand, same specification, same to color, the same to place of production, the cement with batch should be used, Ask cement pure color, stability and the good ordinary portland cement of intensity；Coarse aggregate selects intensity high, 5mm~31.5mm Partial size, continuous grading be good, the rubble of same color, clay content≤0.8%；Fine aggregate selects clean medium coarse sand, fineness modulus 2.5 More than, clay content≤2%；Incorporation flyash can improve the mobility and later strength of concrete, select and press " flyash concrete Application technology specification " (GBJ146-90) regulation II grade of flyash of fineness more than product；Additive uses retardation water reducing agent；

(2) concrete pours

Pouring for concrete is poured using automotive pump, pours 6m high every time according to pillar height situation；Upper-lower section is poured to guarantee to be segmented Between piece plug into and be aligned straight, when every section concrete is poured onto from top 20cm, mixed after top surface dispenses one layer of microlith The pressure of smearing of solidifying soil receives slurry；Blanking uses tumbling barrel, prevents from forming mudcake on the inside of concrete grout pollution column template, influences coagulation after demoulding Native surface quality；Blanking will uniformly, in order to avoid impact steel bar reinforced or cause concrete disintegration；The height and thickness of each blanking of strict control Degree；Vibrating method requires correctly, must not leakage and over vibration；Using secondary vibration method, to reduce blibbing；Vibrating time is with mixed It is 15s until solidifying soil frost boiling is no longer sunk and surface bubble-free rises；To improve construction efficiency, three columns mutually closed on are chosen Son staggeredly pours simultaneously；

(3) concrete curing and finished product protection

Concrete column side form should be removed after 48h；First with the tight covering curing of plastic film, plastic film external application gunnysack after demoulding Package, curing time must not generally be less than 14d；Pillar surrounding after pouring demoulding is set up with steel pipe goes along with sb. to guard him frame protection；Column package Material must not be removed before flooring and interior decoration construction finish；

(4) concrete surface defect mending

The sand that surface laitance and loosening should be removed after demoulding immediately, using same breed, the cement mixing of same intensity grade Rejected region is repaired at cement slurry, after cement slurry hardening, entire component surface is equably polished with fine sandpaper bright and clean, And it is rinsed with water cleaning, it is ensured that surface no color differnece.

Template installation details has four big main points:

(1) template wants arranged in dislocation: every section of height of template is 6m, and the good template of processing and fabricating is 3m, therefore during installation, to template Carry out arranged in dislocation；It is first carried out closing up closure with iron wire, then be reinforced with fixed steel band, the spacing between fixed steel band is 20- 30cm mono-；After template closes up reinforcing, the bottom disk of template preferably from the ground 0.5-1cm distance simultaneously uses concrete joint filling；

(2) steel band is horizontally mounted: most handy steel ruler measures template when steel band installation, follows closely in the sustained height surrounding of template Upper 3-4 small nail；Steel band is placed on nail when upper steel band, the installation of steel band can be kept horizontal, when screw is installed, often One screw tightening degree will be consistent, and just can guarantee the consistency and construction safety of steel band elasticity in this way；

(3) lower interface is reinforced on: the position that lower interface is installed in two pieces of templates can increase by a bar steel band and be reinforced, steel Band has to horizontal covering reinforcing can disposably pour within interface position, seven meters of column-form placing concrete, and seven meters It pours in two times above, second of pouring can be carried out within 30-60 minutes after pouring for the first time；

(4) protect to template: template protects template after installing, and to add 5 × 10cm's in template surrounding Flitch four, and be fixed with the flitch of steel pipe, the distance of steel pipe between the upper and lower is 50-150cm, not only can be to mould Plate carries out perpendicular positioning, and can make template is forced into an entirety, has the function that second consolidation.

The present invention is easy for construction, and construction effect is good.Pillar overall height verticality maximum deviation only 4mm.

Below with reference to embodiment, the invention will be further described.

Specific embodiment

A kind of superelevation clear-water concrete independence cylinder construction method, including support system construction, template construction, reinforced bar engineering Construction, concrete engineering construction；The support system construction: colonnade uses full hall scaffold support system, and upright bar is along beam span Direction spacing 0.5m, it is 0.1m, upright bar step pitch 1.5m, board bottom load-bearing upright bar transverse direction that upright bar upper end, which extend out to shuttering supporting point length, Spacing or array pitch 0.9m, beam two sides upright bar spacing 0.9m；It is 1 that beam bottom, which increases load-bearing upright bar radical, when beam section >=400, beam Bottom sets 2；Upright bar is using double fastener load-bearing connection types；All high-supported formwork bottom of upright rod need to be laid with elongated scaffold board, if vertical It laterally sweeps the floor bar, beam bottom direction need to set bridging, set horizontal cross brace every four steps；Independent pillar surrounding adds 5 × 10cm Flitch four, then fix flitch with steel pipe every 50-150cm distances, and be connected with framed bent around, formed whole；

The template construction includes:

(1) template processing and fabricating

Cylinder is using wooden circle template of being formed, and by template, factory is made；Form is two semicircles, standard knot monolithic length 3m, mould Plate plate thickness 18mm, plastic sealing strip are concave-convex slot form, so that piece is combined closely, prevent running pulp, spillage, had made concrete demoulding both It is fast and beautiful, while playing the role of stabilization and reinforcement again；Template is reinforced every 20-30mm using steel band from top to bottom；

(2) assembly of column mould with install

Live sectional is carried out into cylindrical surface entirety, about 6m every section high according to different pillar heights；Tower is used in tower crane lifting range Lifting is installed in place, hang less than position sling and be buckled on the pillar reinforcement cage skeleton bound with truck crane；Before molding Carefully cleaning template on the inside of, first polished with coarse sandpaper, after polished with fine sandpaper, and uniformly apply rinse colourless release agent, form joint The case where processing is tight, and the full coat butter in tongue and groove both protects tongue and groove, is also prevented from running pulp, spillage generation；Template is every It is secondary be used in turn should all carry out comprehensively check correction and polishing grinding it is primary；

The reinforcement engineering construction major measure is as follows:

(1) strict control steel bar matching processing dimension is specially arranged steel bar meter place, all straightening, cutting, bending, molding, The processes such as mantle fiber are all made of mechanical equipment processing and first have to check lower material list various reinforcing bar ruler to control formed reinforcing steel bars size It is very little, the several stirrups of elder generation's preprocessing and compact dimensions are checked when processing, are caused machining deviation to adjust bar bending adjusted value, are determined It can batch machining production after errorless；For the circularity for guaranteeing framework of steel reinforcement, longitudinally spaced 2m increases in cylinder framework of steel reinforcement One of φ 16 positions stirrup, and positioning stirrup forms on mold, weld, and on periphery by the distributing position φ of column main reinforcement 6 short muscle weld main reinforcement positioning card, strictly hold steel bar matching pass, conscientiously press figure ingredient, close inspection ingredient size, conscientiously by figure Paper review, for cover to reinforcement in addition to meeting design main reinforcement protective layer and requiring, the protective layer of stirrup distribution presses code requirement control System is being not less than 15mm, prevents crack occur along stirrup when concrete shrinkage；

(2) according to design requirement, the connection type of main reinforcement is upsetting straight, can guarantee connector in this way for splice and binding The density of reinforcing bar does not increase in range, guarantees that reinforcement location is accurate, is not subjected to displacement, and the tied silk of reinforcing bar binding should be folded to reinforcing bar Among frame, to prevent because concrete surface is polluted in corrosion after being folded to outside exposing surface；

(3) prevent the measure of reinforcement displacement from ensuring that reinforcing bar position of taking root is accurate: by column position look in look for circle, and find out main reinforcement spacing, It is bound with sole plate or floor reinforcing bar and spot welding is fixed, guarantees main reinforcement position accurately and does not move；

(4) it prevents reinforcing bar when casting concrete from shifting: accurate location should be adjusted to before the binding of column muscle, accomplish vertical up and down, protective layer Using dedicated high-strength cement cushion block, uniform, unified arrangement, to guarantee the thickness of protective layer；

The concrete engineering construction:

(1) preparation of concrete:

The raw material cement of clear-water concrete: same to brand, same specification, same to color, the same to place of production, the cement with batch should be used, Ask cement pure color, stability and the good ordinary portland cement of intensity；Coarse aggregate selects intensity high, 5mm~31.5mm Partial size, continuous grading be good, the rubble of same color, clay content≤0.8%；Fine aggregate selects clean medium coarse sand, fineness modulus 2.5 More than, clay content≤2%；Incorporation flyash can improve the mobility and later strength of concrete, select and press " flyash concrete Application technology specification " (GBJ146-90) regulation II grade of flyash of fineness more than product；Additive uses retardation water reducing agent；

(2) concrete pours

Pouring for concrete is poured using automotive pump, pours 6m high every time according to pillar height situation；Upper-lower section is poured to guarantee to be segmented Between piece plug into and be aligned straight, when every section concrete is poured onto from top 20cm, mixed after top surface dispenses one layer of microlith The pressure of smearing of solidifying soil receives slurry；Blanking uses tumbling barrel, prevents from forming mudcake on the inside of concrete grout pollution column template, influences coagulation after demoulding Native surface quality；Blanking will uniformly, in order to avoid impact steel bar reinforced or cause concrete disintegration；The height and thickness of each blanking of strict control Degree；Vibrating method requires correctly, must not leakage and over vibration；Using secondary vibration method, to reduce blibbing；Vibrating time is with mixed It is 15s until solidifying soil frost boiling is no longer sunk and surface bubble-free rises；To improve construction efficiency, three columns mutually closed on are chosen Son staggeredly pours simultaneously；

(3) concrete curing and finished product protection

Concrete column side form should be removed after 48h；First with the tight covering curing of plastic film, plastic film external application gunnysack after demoulding Package, curing time must not generally be less than 14d；Pillar surrounding after pouring demoulding is set up with steel pipe goes along with sb. to guard him frame protection；Column package Material must not be removed before flooring and interior decoration construction finish；

(4) concrete surface defect mending

The sand that surface laitance and loosening should be removed after demoulding immediately, using same breed, the cement mixing of same intensity grade Rejected region is repaired at cement slurry, after cement slurry hardening, entire component surface is equably polished with fine sandpaper bright and clean, And it is rinsed with water cleaning, it is ensured that surface no color differnece.

Template installation details has four big main points:

(1) template wants arranged in dislocation: every section of height of template is 6m, and the good template of processing and fabricating is 3m, therefore during installation, to template Carry out arranged in dislocation；It is first carried out closing up closure with iron wire, then be reinforced with fixed steel band, the spacing between fixed steel band is 20- 30cm mono-；After template closes up reinforcing, the bottom disk of template preferably from the ground 0.5-1cm distance simultaneously uses concrete joint filling；

(2) steel band is horizontally mounted: most handy steel ruler measures template when steel band installation, follows closely in the sustained height surrounding of template Upper 3-4 small nail；Steel band is placed on nail when upper steel band, the installation of steel band can be kept horizontal, when screw is installed, often One screw tightening degree will be consistent, and just can guarantee the consistency and construction safety of steel band elasticity in this way；

(3) lower interface is reinforced on: the position that lower interface is installed in two pieces of templates can increase by a bar steel band and be reinforced, steel Band has to horizontal covering reinforcing can disposably pour within interface position, seven meters of column-form placing concrete, and seven meters It pours in two times above, second of pouring can be carried out within 30-60 minutes after pouring for the first time；

(4) protect to template: template protects template after installing, and to add 5 × 10cm's in template surrounding Flitch four, and be fixed with the flitch of steel pipe, the distance of steel pipe between the upper and lower is 50-150cm, not only can be to mould Plate carries out perpendicular positioning, and can make template is forced into an entirety, has the function that second consolidation.

Claims (2)

1. a kind of superelevation clear-water concrete independence cylinder construction method, including support system construction, template construction, reinforced bar engineering are applied Work, concrete engineering construction, it is characterized in that:

The support system construction: colonnade uses full hall scaffold support system, and upright bar is along beam span direction spacing 0.5m, upright bar It is 0.1m, upright bar step pitch 1.5m, board bottom load-bearing upright bar horizontal spacing or array pitch 0.9m, beam that upper end, which extend out to shuttering supporting point length, Two sides upright bar spacing 0.9m；It is 1 that beam bottom, which increases load-bearing upright bar radical, and when beam section >=400, beam bottom sets 2；Upright bar is using double Fastener load-bearing connection type；All high-supported formwork bottom of upright rod need to be laid with elongated scaffold board, if vertically and horizontally sweeping the floor bar, beam bottom direction Bridging need to be set, sets horizontal cross brace every four steps；Independent pillar surrounding adds flitch four of 5 × 10cm, then every 50-150cm distances fix flitch with steel pipe, and are connected with framed bent around, are formed whole；

The template construction includes:

(1) template processing and fabricating

Cylinder is using wooden circle template of being formed, and by template, factory is made；Form is two semicircles, standard knot monolithic length 3m, mould Plate plate thickness 18mm, plastic sealing strip are concave-convex slot form, so that piece is combined closely, prevent running pulp, spillage, had made concrete demoulding both It is fast and beautiful, while playing the role of stabilization and reinforcement again；Template is reinforced every 20-30mm using steel band from top to bottom；

(2) assembly of column mould with install

Live sectional is carried out into cylindrical surface entirety, about 6m every section high according to different pillar heights；Tower is used in tower crane lifting range Lifting is installed in place, hang less than position sling and be buckled on the pillar reinforcement cage skeleton bound with truck crane；Before molding Carefully cleaning template on the inside of, first polished with coarse sandpaper, after polished with fine sandpaper, and uniformly apply rinse colourless release agent, form joint The case where processing is tight, and the full coat butter in tongue and groove both protects tongue and groove, is also prevented from running pulp, spillage generation；Template is every It is secondary be used in turn should all carry out comprehensively check correction and polishing grinding it is primary；

The reinforcement engineering construction major measure is as follows:

(1) strict control steel bar matching processing dimension is specially arranged steel bar meter place, all straightening, cutting, bending, molding, The processes such as mantle fiber are all made of mechanical equipment processing and first have to check lower material list various reinforcing bar ruler to control formed reinforcing steel bars size It is very little, the several stirrups of elder generation's preprocessing and compact dimensions are checked when processing, are caused machining deviation to adjust bar bending adjusted value, are determined It can batch machining production after errorless；For the circularity for guaranteeing framework of steel reinforcement, longitudinally spaced 2m increases in cylinder framework of steel reinforcement One of φ 16 positions stirrup, and positioning stirrup forms on mold, weld, and on periphery by the distributing position φ of column main reinforcement 6 short muscle weld main reinforcement positioning card, strictly hold steel bar matching pass, conscientiously press figure ingredient, close inspection ingredient size, conscientiously by figure Paper review, for cover to reinforcement in addition to meeting design main reinforcement protective layer and requiring, the protective layer of stirrup distribution presses code requirement control System is being not less than 15mm, prevents crack occur along stirrup when concrete shrinkage；

(2) according to design requirement, the connection type of main reinforcement is upsetting straight, can guarantee connector in this way for splice and binding The density of reinforcing bar does not increase in range, guarantees that reinforcement location is accurate, is not subjected to displacement, and the tied silk of reinforcing bar binding should be folded to reinforcing bar Among frame, to prevent because concrete surface is polluted in corrosion after being folded to outside exposing surface；

(3) prevent the measure of reinforcement displacement from ensuring that reinforcing bar position of taking root is accurate: by column position look in look for circle, and find out main reinforcement spacing, It is bound with sole plate or floor reinforcing bar and spot welding is fixed, guarantees main reinforcement position accurately and does not move；

(4) it prevents reinforcing bar when casting concrete from shifting: accurate location should be adjusted to before the binding of column muscle, accomplish vertical up and down, protective layer Using dedicated high-strength cement cushion block, uniform, unified arrangement, to guarantee the thickness of protective layer；

The concrete engineering construction:

(1) preparation of concrete:

The raw material cement of clear-water concrete: same to brand, same specification, same to color, the same to place of production, the cement with batch should be used, Ask cement pure color, stability and the good ordinary portland cement of intensity；Coarse aggregate selects intensity high, 5mm~31.5mm Partial size, continuous grading be good, the rubble of same color, clay content≤0.8%；Fine aggregate selects clean medium coarse sand, fineness modulus 2.5 More than, clay content≤2%；Incorporation flyash can improve the mobility and later strength of concrete, select and press " flyash concrete Application technology specification " (GBJ146-90) regulation II grade of flyash of fineness more than product；Additive uses retardation water reducing agent；

(2) concrete pours

Pouring for concrete is poured using automotive pump, pours 6m high every time according to pillar height situation；Upper-lower section is poured to guarantee to be segmented Between piece plug into and be aligned straight, when every section concrete is poured onto from top 20cm, mixed after top surface dispenses one layer of microlith The pressure of smearing of solidifying soil receives slurry；Blanking uses tumbling barrel, prevents from forming mudcake on the inside of concrete grout pollution column template, influences coagulation after demoulding Native surface quality；Blanking will uniformly, in order to avoid impact steel bar reinforced or cause concrete disintegration；The height and thickness of each blanking of strict control Degree；Vibrating method requires correctly, must not leakage and over vibration；Using secondary vibration method, to reduce blibbing；Vibrating time is with mixed It is 15s until solidifying soil frost boiling is no longer sunk and surface bubble-free rises；To improve construction efficiency, three columns mutually closed on are chosen Son staggeredly pours simultaneously；

(3) concrete curing and finished product protection

Concrete column side form should be removed after 48h；First with the tight covering curing of plastic film, plastic film external application gunnysack after demoulding Package, curing time must not generally be less than 14d；Pillar surrounding after pouring demoulding is set up with steel pipe goes along with sb. to guard him frame protection；Column package Material must not be removed before flooring and interior decoration construction finish；

(4) concrete surface defect mending

The sand that surface laitance and loosening should be removed after demoulding immediately, using same breed, the cement mixing of same intensity grade Rejected region is repaired at cement slurry, after cement slurry hardening, entire component surface is equably polished with fine sandpaper bright and clean, And it is rinsed with water cleaning, it is ensured that surface no color differnece.

2. superelevation clear-water concrete independence cylinder construction method according to claim 1, it is characterized in that: template installs details There are four big main points:

(1) template wants arranged in dislocation: every section of height of template is 6m, and the good template of processing and fabricating is 3m, therefore during installation, to template Carry out arranged in dislocation；It is first carried out closing up closure with iron wire, then be reinforced with fixed steel band, the spacing between fixed steel band is 20- 30cm mono-；After template closes up reinforcing, the bottom disk of template preferably from the ground 0.5-1cm distance simultaneously uses concrete joint filling；

(2) steel band is horizontally mounted: most handy steel ruler measures template when steel band installation, follows closely in the sustained height surrounding of template Upper 3-4 small nail；Steel band is placed on nail when upper steel band, the installation of steel band can be kept horizontal, when screw is installed, often One screw tightening degree will be consistent, and just can guarantee the consistency and construction safety of steel band elasticity in this way；

(3) lower interface is reinforced on: the position that lower interface is installed in two pieces of templates can increase by a bar steel band and be reinforced, steel Band has to horizontal covering reinforcing can disposably pour within interface position, seven meters of column-form placing concrete, and seven meters It pours in two times above, second of pouring can be carried out within 30-60 minutes after pouring for the first time；

(4) protect to template: template protects template after installing, and to add 5 × 10cm's in template surrounding Flitch four, and be fixed with the flitch of steel pipe, the distance of steel pipe between the upper and lower is 50-150cm, not only can be to mould Plate carries out perpendicular positioning, and can make template is forced into an entirety, has the function that second consolidation.