CN111472548A - High-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process - Google Patents
High-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process Download PDFInfo
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- CN111472548A CN111472548A CN202010341698.9A CN202010341698A CN111472548A CN 111472548 A CN111472548 A CN 111472548A CN 202010341698 A CN202010341698 A CN 202010341698A CN 111472548 A CN111472548 A CN 111472548A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6806—Waterstops
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
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- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to the field of prefabricated wallboard assembly and discloses a high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process, which comprises the following equipment: grouting pump, mortar mixer, electronic weighing scale, measuring cup, iron drum, screen and rubber hole-plugging plug; the process flow of the high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process is as follows: s1, performing base layer treatment on the prefabricated wallboard before grouting; s2, sealing seams of the base slurry and performing bin separation treatment; s3, preparing grouting; s4, inspecting grouting materials; s5, preparing construction before grouting; and S6, grouting. This prefabricated wallboard reinforcing bar grouting process of high-rise building assembled through carrying out the subregion to the grout, from one side grout, can get rid of the air when ensureing to grout, prevents that grout nest from living the air more than the both sides simultaneously, forms the air interlayer in the grout wallboard to the quality of grout has been improved.
Description
Technical Field
The invention relates to the field of prefabricated wallboard assembly, in particular to a steel bar grouting process for an assembled prefabricated wallboard of a high-rise building.
Background
Along with the continuous development in building field, the application of prefabricated wallboard of assembled is also wider and wider, through prefabricating the prefabricated wallboard in advance promptly, when the house is built, only through with prefabricated wallboard transport to the assembly ground install can, during the preparation of assembled wallboard component, refer to figure 4, through setting up steel bar bracket, again through making to steel bar bracket internal grouting.
However, in the grouting process of the existing prefabricated wallboard, when the seat slurry is subjected to seam sealing and bin splitting treatment, the problem that the seat slurry is burst due to overlarge pressure in the sealed bin or the slurry in the sealed bin is not tight due to overlarge bin splitting distance easily occurs during grouting, so that the filling quality of the steel bar of the prefabricated wallboard is influenced.
Disclosure of Invention
Aiming at the defects of the background technology, the invention provides a high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process, which has the advantage of high wallboard grouting quality and solves the problems in the background technology.
The invention provides the following technical scheme: a high-rise building assembled prefabricated wallboard steel bar grouting process is characterized in that: the high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process comprises the following equipment: grouting pump, mortar mixer, electronic weighing scale, measuring cup, iron drum, screen and rubber hole-plugging plug;
the process flow of the high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process is as follows:
s1, treating the base layer of the prefabricated wallboard before grouting, sprinkling water to wet the base layer, enabling the grouting surface of the component to be in a wet state without obvious water accumulation, sticking the sticking type waterproof roll material to the inner side of the base layer of the prefabricated wallboard, grouting the prefabricated component by adopting a communicating cavity, and placing and fixing sleeve steel bars which are arranged at equal intervals in the base layer;
s2, sealing seams by the aid of seat slurry and dividing the seams into bins, cleaning the seams, flushing water to wet contact surfaces and component grouting sleeves, stirring slurry of the bin sealing seats, placing PVC pipes with the corresponding sizes to the seams on a base layer through the bin sealing seat slurry, compacting the seams, smearing pressure on the bin sealing material at the bottom of the prefabricated wallboard to form a chamfer, slowly drawing out a snakeskin hose or a PVP pipe, and maintaining for 24 hours;
s3, preparing grouting, namely screening grouting materials through a screen, wherein the screen is a 200-mesh screen, filtering out larger particles, mixing the screened grouting materials and water in an iron bucket, weighing by an electronic weighing scale and a measuring cup, accurately controlling the proportion of the grouting materials and the water to be mixed, and uniformly stirring and mixing through a mortar stirrer, wherein the stirring water adopts drinking water, and the prepared grouting materials are kept stand for 2 minutes to defoam;
s4, grouting material inspection, namely detecting a grouting material stirring object to be used, and detecting the fluidity, the compressive strength at 1d, the compressive strength at 28d, the vertical expansion rate at 3h and the difference value between the vertical expansion rates at 24h and 3h of the grouting material for 30min according to the construction standard;
s5, construction preparation before grouting work, joint process inspection is carried out on approach reinforcing steel bars of different reinforcing steel bar production enterprises to be constructed, in the construction process, if the external dimension of a replacement reinforcing steel bar is greatly different from the reinforcing steel bar subjected to the process inspection, process inspection is supplemented, 3 centering sleeve grouting connecting joints are manufactured for reinforcing steel bars of each specification, the grouting quality is checked, the grouting sleeve to be constructed is detected, slag inclusion, cold shut, sand holes, air holes and cracks do not exist on the surface of the grouting sleeve, and quality defects influencing the use performance such as sharp edges and burrs do not exist outside the edge of the end surface and the outer surface of the grouting sleeve;
and S6, grouting, wherein according to grouting subareas, a non-plugging grouting hole is reserved in each area lower row of grouting holes and other grouting holes are plugged by rubber plugs or cork plugs, the stirred grouting material is poured into a grouting pump, the grouting pump is started, the pressure of the grouting pump is controlled to be 1Mpa, the flow rate of the grouting material is controlled to be 0.8-1.2L/min, when the grouting material flows out of a pressure hose, the grouting material is inserted into a steel sleeve grouting hole and is grouted from one side, when the grouting material is ejected from the corresponding upper grouting hole, a grouting sleeve is fully filled, and after the grouting hole is fully filled, the grouting hole is sequentially plugged by using a rubber plugging hole plug.
Preferably, the sealing treatment method comprises the following steps:
using a PVC pipe to the side surface of the wall body, transversely filling the PVC pipe into the wall seam, abutting against a sleeve steel bar to control the width of a sealing seam, using a base slurry to seal the side surface of the wall body between PVP pipes 3 to form a sealing seam base slurry, then using the base slurry to fill the rest seam, then drawing out the PVC pipe from the side surface, sealing the wall body to ensure that the periphery of the wall body is sealed tightly, wetting the position needing the base slurry to be sealed by using clean water before using the base slurry, then using the base slurry to seal, curing the base slurry for 6-8 hours, grouting after reaching the strength, then flushing water within hours before sealing the bin, using a water pipe with pressure to flush and wet the inside of the seam, ensuring that the seam is free of oil stain, floating slag and the like, using the PVC pipe as the sealing bin material to plug the horizontal seam of the component and the ground, generally placing the outer edge of the sealing mold, using hands to plug the base slurry into the seam after being agglomerated, and ensuring that the seam is tightly plugged, and then drawing out the plugging die to avoid disturbing the wiped material in the sealing bin as much as possible.
Preferably, the bin dividing processing method comprises the following steps: the base layer of the prefabricated wall board is subjected to bin dividing treatment through the seat slurry to form bin-divided seat slurry, the height of the seat slurry bin is 30mm, the width of the seat slurry bin is 48-52mm, the length of the seat slurry bin is 200mm, the seat slurry bin is triangular, the corresponding position on a wall is marked with chalk, holes are reserved at corners for exhausting air, the bin dividing distance is not more than 1.5m, bin dividing operation is carried out on a wall body with the length of more than 1.5m, the bin dividing distance is preferably 1.2-1.5m according to field experience, too large pressure in a sealed cabin during grouting easily causes bursting or extruding the seat slurry, and the situation that the slurry in the sealed cabin is not compact due to too large bin dividing distance can be caused.
Preferably, the backing material of the sealant at the joint is preferably polyethylene plastic rod or foaming neoprene rubber, and the diameter of the backing material is not less than 1.5 times of the width of the joint.
Preferably, the allowable deviation of the length of the grouting sleeve is +/-1 mm, the allowable deviation of the outer diameter of the grouting sleeve is +/-1.5 mm, the allowable deviation of the wall thickness of the grouting sleeve is +/-1.2 mm, the allowable deviation of the inner diameter of the annular protruding part of the anchoring section is +/-1.5 mm, and the difference between the minimum size of the inner diameter of the annular protruding part of the anchoring section and the nominal diameter of the steel bar is more than or equal to 10 mm.
Preferably, the number of the grouting materials which are checked in the same component and same batch number is not more than 50t, and one batch is selected, wherein the grouting materials are determined to have the fineness modulus of 1.8 according to the size of the grouting materials and the proportion of raw materials and by the sand grain diameter of not more than 0.35 mm.
Preferably, the grouting operation is finished within 30min after the grouting material is stirred by adding water, grouting is carried out in one grouting hole in the same bin, the grouting operation is continuously finished in one area, and the scattered grouting material mixture cannot be used for the second time.
Preferably, the residual mixture of grouting construction can not be used after grouting material and water are added again, the joint is checked to be blocked before grouting is completed and slurry is initially set, timely grouting treatment is carried out if the slurry of the slurry outlet hole is not compact, and after the grouting material is solidified, the compact situation of the slurry outlet hole at the position of the grouting sleeve is checked one by one to ensure the quality of each grouting.
Preferably, the high-rise building assembly type prefabricated wall panel steel bar grouting pre-process comprises the following steps:
a. inspecting the permeability of the wallboard sleeve;
b. calibrating the steel bar before top pouring;
c. controlling the time scale height of top pouring;
d. roughening the grouting area;
e. installing and calibrating the wallboard;
f. sealing a bin with mortar;
d. the sealing effect was checked.
The invention has the following beneficial effects:
according to the high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process, grouting is carried out from one side by carrying out partition treatment on grouting, air can be exhausted during grouting, air is prevented from being trapped by grouting holes on two sides simultaneously, and an air interlayer is formed in a grouting wallboard, so that the grouting quality is improved; when the seat slurry is sealed and subjected to warehouse separation treatment, a PVC pipe or a 2cm cable is transversely inserted into the side face of the wall body and is abutted against the sleeve steel bar under the wall seam to control the sealed seam width, then the rest seam is filled with the seat slurry, and the warehouse separation treatment is carried out on the base layer of the prefabricated wall board through the seat slurry, so that the seat slurry cannot be burst or extruded due to overlarge pressure in the sealed cabin when the wall board steel bar is grouted, the problem that the slurry in the sealed cabin is not tight is solved, the friction between the wall board and the floor is increased during the joint sealing and warehouse separation treatment of the seat slurry, and the condition that the seat slurry is integrally extruded due to large grouting pressure is avoided during grouting; defoaming treatment is carried out on the prepared grouting, so that the grouting for the reinforcing steel bars of the wallboard can not influence the preparation quality of the wallboard; and through the leading process of assembled prefabricated wallboard reinforcing bar filling, calibrate the wallboard of installation to the guarantee installation is accurate, provides the guarantee for follow-up wallboard grout quality.
Drawings
FIG. 1 is a flow chart of the steel bar filling process of the prefabricated wall panel according to the present invention;
FIG. 2 is a schematic view of a pre-process flow of the assembly type prefabricated wall panel steel bar filling of the present invention;
FIG. 3 is a schematic view of grouting zonal sealing according to the present invention;
fig. 4 is a partial schematic view of existing precast wallboard rebar grouting.
In the figure: 1. separating and setting the slurry; 2. sleeve steel bars; 3. PVC pipes; 4. sealing the seam and setting the slurry; 5. a waterproof roll.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a steel bar grouting process for prefabricated wall panels of high-rise buildings comprises the following steps: the high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process comprises the following equipment: grouting pump, mortar mixer, electronic weighing scale, measuring cup, iron bucket, screen and rubber hole-plugging plug.
The process flow of the high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process is as follows:
s1, treating the base layer of the prefabricated wallboard before grouting, cleaning the surface of a grouting sleeve contacted with a grouting material before grouting, sticking the adhesive waterproof coiled material 5 to the inner side of the base layer of the prefabricated wallboard instead of an extruded sheet, preventing a post-cast component from leaking and running during pouring, preventing impurities such as oil stain, floating ash, adhesive substances, wood dust and the like and no movable concrete fragments and stones, watering and wetting, ensuring that the grouting surface of the component is in a wet state and has no obvious water accumulation, ensuring that the joint of the component and a template and a mortar cake is tight and cannot leak, grouting the prefabricated component by adopting a communicating cavity, and placing and fixing sleeve steel bars 2 which are arranged at equal intervals in the base layer.
S2, sealing the seam with the base slurry, dividing the seam into separate chambers, cleaning the inside of the seam, flushing water to wet the contact surface and the component grouting sleeve, stirring the slurry for sealing the chamber base, placing the PVC pipe 3 (or the snakeskin hose) with the size corresponding to the seam, and plugging the seam tightly.
The back lining material of the sealant at the joint is preferably polyethylene plastic rod or foaming chloroprene rubber, the diameter is not less than 1.5 times of the width of the joint, so that the sealing material at the joint has compatibility with concrete and anti-shearing telescopic deformation capability, and the prefabricated wallboard has mildew-proof, waterproof, fireproof, weather-proof and other performances.
Sealing treatment (see fig. 3): using a PVC pipe 3 to the side surface of the wall body, transversely filling the PVC pipe 3 to the side surface of the wall body below the wall joint and abutting against the sleeve steel bar 2 to control the joint sealing width, using a base slurry to seal the side surface of the wall body between the PVP pipes 3 to form a joint sealing base slurry 4, then using the base slurry to fill the rest gap, then drawing out the PVC pipe 3 from the side surface, ensuring that the periphery of the wall body is sealed tightly, wetting the position needing the base slurry to seal the joint by using clear water before using the base slurry, then using the base slurry to seal the joint, curing the base slurry for 6-8 hours, and grouting after reaching the strength; flushing water within hours before sealing the bin, adopting a water pipe with pressure to flush water in the joint to be wet and ensure that no oil stain, scum and the like exist in the joint, using a PVC pipe 3 and the like as bin sealing material to plug the plugging die into a horizontal seam between the component and the ground, generally placing the outer edge of the plugging die close to the outer edge of the component, using hands to hold seat slurry into a ball and then plug the joint, ensuring that the joint is plugged firmly, then drawing out the plugging die, and avoiding disturbing the well-smeared bin sealing material as much as possible.
Wherein, the seat thick liquids should be smeared and pressed into a chamfer, the frictional force of multiplicable wallboard and floor, can not cause the whole condition of being extruded of seat thick liquids because of grouting pressure is big when guaranteeing to be in milk.
And (3) bin separation treatment: the base layer of the prefabricated wall board is subjected to bin dividing treatment through the seat slurry to form bin-divided seat slurry 1, the bin dividing effect is shown in a figure 3, the height of the seat slurry bin is 30mm, the width is 48-52mm, the length is 200mm, the seat slurry bin is triangular, corresponding positions on the wall are marked with chalk, holes are reserved in corners for exhausting air, the bin dividing distance is not more than 1.5m, the bin dividing operation is carried out on a wall body with the length being more than 1.5m, the bin dividing distance is preferably 1.2-1.5m according to field experience, too small pressure in a sealed cabin is excessive to burst or extrude the seat slurry when grouting is easily caused, and the situation that the slurry in the sealed cabin is not dense due to too large bin dividing distance can be caused.
S3, preparing grouting, at a construction site, after a stirrer and a grouting pump are in place, screening grouting materials through a screen, filtering out large particles, wherein the screen is a 200-mesh screen, preventing the grouting materials with the large particles from influencing the later grouting work, mixing the screened grouting materials with water in an iron bucket, weighing by an electronic scale and a measuring cup, accurately controlling the proportion mixing of the grouting materials and the water, uniformly stirring and mixing through a mortar stirrer, wherein the mixing water adopts drinking water, defoaming the prepared grouting for 2 minutes, and ensuring that the grouting can not influence the grouting quality of a wallboard.
S4, grouting material inspection, wherein the grouting material stirring object to be used is detected, the fluidity of the grouting material is detected for 30min, the compression strength is detected for 1d, the compression strength is detected for 28d, the vertical expansion rate is detected for 3h, and the difference value between the vertical expansion rates of 24h and 3h is detected, so that the grouting material is ensured to meet the construction standard, wherein the number of the grouting materials to be inspected is one batch of the grouting materials with the same composition and the same batch number, and is not more than 50t, the grouting material is determined to have the fineness modulus of 1.8 according to the size and the raw material ratio of the grouting material and the sand grain diameter of not more than 0.35mm, and the fluidity of the grouting.
S5, preparing construction before grouting, carrying out joint process inspection on approach reinforcing steel bars of different reinforcing steel bar production enterprises needing construction, and supplementing process inspection in the construction process, if the external dimension of the replaced reinforcing steel bar has a large difference with the reinforcing steel bar subjected to process inspection; 3 centering sleeve grouting connecting joints are manufactured for each specification of steel bars, and grouting quality is checked; and detecting the grouting sleeve to be constructed, wherein the surface of the grouting sleeve is free of slag inclusion, cold shut, sand holes, air holes and cracks, and the quality defects of influence on service performance such as sharp edges and burrs and the like are not formed outside the edge of the end surface and the outer surface of the grouting sleeve, wherein a small amount of rusts or floating rusts can be formed on the surface of the grouting sleeve, and if rusts exist, the grouting sleeve does not meet the construction standard so as to ensure that the grouting sleeve meets the construction standard.
The length allowable deviation of the grouting sleeve is +/-1 mm, the outer diameter allowable deviation is +/-1.5 mm, the wall thickness allowable deviation is +/-1.2 mm, the inner diameter allowable deviation of the annular protruding part of the anchoring section is +/-1.5 mm, and the difference between the minimum inner diameter size of the annular protruding part of the anchoring section and the nominal diameter of the steel bar is more than or equal to 10 mm.
S6, grouting, according to grouting subareas, reserving a non-plugging grouting hole as a grouting hole at the lower row of grouting holes in each area, plugging the rest grouting holes by using rubber plugs or cork plugs, pouring the stirred grouting material into a screw type grouting pump, starting the grouting pump, controlling the pressure of the grouting pump to be 1Mpa (the grouting pressure at 1Mpa can meet the wall grouting requirement of 3m length), controlling the flow rate of the grouting material to be 0.8-1.2L/min, inserting the grouting material into the grouting hole of the steel sleeve when the grouting material flows out of a pressure hose, grouting from one side, ensuring that air can be discharged during grouting, avoiding air nest caused by simultaneous grouting at more than two sides to form an air interlayer to influence the grouting quality, fully grouting the grouting sleeve when the grouting material overflows from the corresponding upper grouting hole, and sequentially plugging the grouting hole by using the rubber plugging hole plug after the grouting is full.
Wherein, the grouting operation is finished within 30min after the grouting material is stirred by adding water, grouting is carried out in a grouting hole in the same bin, the grouting operation in one area is continuously finished, the midway stopping is not needed, and the scattered grouting material mixture cannot be used for the second time;
wherein, the use behind surplus mixture must not add grout material, water again, and accomplish in the grout, the inspection has blocked the joint before the thick liquids initial set, if there is the grout hole thick liquids noncondensing condition in time to mend and irritate the processing, treats the grout solidification back, inspects grout sleeve department row thick liquids closely knit condition one by one, ensures the quality of every grout.
When the grouting construction is carried out, the reason can be found out by taking the following measures:
a. for an uncompacted and full vertical slurry sleeve, when the grouting material is mixed with water for 30min, the grouting hole is firstly replenished, when the grouting material mixture can not flow, the grouting can be performed from the grout outlet, and manual equipment is adopted to perform grouting in combination with the pressure of a thin pipe;
b. if the grouting mixture is found to descend 30s after the horizontal steel bar connection grouting construction is stopped, immediately checking the sealing of the grouting sleeve or the air exhaust condition of the grouting mixture, and taking a filling measure in time after finding out the reason;
c. and stopping the supplementary irrigation after the grouting mixture reaches the position specified by the design, and checking whether the position of the grouting mixture meets the requirement again after the grouting mixture is solidified.
Wherein, according to grouting subareas, a measure of adding a corrugated pipe as an exhaust hole at any position in a grouting area of the prefabricated part is taken, the height of the exhaust hole of the corrugated pipe is 5cm higher than that of a grouting hole of a grouting sleeve so as to be convenient for checking the slurry sedimentation condition at the exhaust hole, when all grouting holes of the grouting sleeve are plugged, pressure is kept for continuous grouting, grouting material overflows from the exhaust hole of the corrugated pipe, the grouting hole is plugged immediately, pressure is continuously increased for 30s after plugging, finally the exhaust hole is sealed, the grouting operation is finished for 5-10min, the slurry liquid level sedimentation condition at the position where the corrugated pipe exhaust hole is bent and additionally arranged is checked, according to the principle of liquid level pressure balance, if the liquid level position of the grouting hole at the bent-up section is slightly settled, the slurry at the grouting sleeve can be judged to be dense, if the slurry is largely settled, the sealing condition of a, immediately processing and timely filling, thereby ensuring the grouting compactness, preventing the grouting from being non-compact and further ensuring the grouting effect of the prefabricated wallboard.
Wherein, the high-rise building assembled prefabricated wallboard steel bar grout's leading process as follows:
checking the permeability of the wallboard sleeve; calibrating the steel bars before the top plate is poured, and manufacturing 3 centering sleeve grouting connecting joints for each specification of steel bars; controlling the top plate pouring time scale height, and controlling the height of the inner side of the upper opening of the wall body within +/-3 mm after the prefabricated wall body is hoisted; carrying out napping treatment on the grouting area; after a base layer before the wallboard is installed is cleaned, flushing the base layer clean, then leveling the base layer by using a hard plastic cushion block after no sundries exist, after the external wallboard is installed, carrying out polymer mortar seam plugging treatment, placing an adjusting block, pasting a bin sealing strip during bin sealing, and dividing the bins by using mortar; calibrating the installed wall plate to ensure accurate installation; and sealing treatment is carried out through mortar, and the sealing effect is checked, so that the subsequent wall board grouting quality is guaranteed.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A high-rise building assembled prefabricated wallboard steel bar grouting process is characterized in that: the high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process comprises the following equipment: grouting pump, mortar mixer, electronic weighing scale, measuring cup, iron drum, screen and rubber hole-plugging plug;
the process flow of the high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting process is as follows:
s1, treating the base layer of the prefabricated wallboard before grouting, sprinkling water to wet the base layer, enabling the grouting surface of the component to be in a wet state without obvious water accumulation, sticking the sticking type waterproof roll material to the inner side of the base layer of the prefabricated wallboard, grouting the prefabricated component by adopting a communicating cavity, and placing and fixing sleeve steel bars which are arranged at equal intervals in the base layer;
s2, sealing seams by the aid of seat slurry and dividing the seams into bins, cleaning the seams, flushing water to wet contact surfaces and component grouting sleeves, stirring slurry of the bin sealing seats, placing PVC pipes with the corresponding sizes to the seams on a base layer through the bin sealing seat slurry, compacting the seams, smearing pressure on the bin sealing material at the bottom of the prefabricated wallboard to form a chamfer, slowly drawing out a snakeskin hose or a PVP pipe, and maintaining for 24 hours;
s3, preparing grouting, namely screening grouting materials through a screen, wherein the screen is a 200-mesh screen, filtering out larger particles, mixing the screened grouting materials and water in an iron bucket, weighing by an electronic weighing scale and a measuring cup, accurately controlling the proportion of the grouting materials and the water to be mixed, and uniformly stirring and mixing through a mortar stirrer, wherein the stirring water adopts drinking water, and the prepared grouting materials are kept stand for 2 minutes to defoam;
s4, grouting material inspection, namely detecting a grouting material stirring object to be used, and detecting the fluidity, the compressive strength at 1d, the compressive strength at 28d, the vertical expansion rate at 3h and the difference value between the vertical expansion rates at 24h and 3h of the grouting material for 30min according to the construction standard;
s5, construction preparation before grouting work, joint process inspection is carried out on approach reinforcing steel bars of different reinforcing steel bar production enterprises to be constructed, in the construction process, if the external dimension of a replacement reinforcing steel bar is greatly different from the reinforcing steel bar subjected to the process inspection, process inspection is supplemented, 3 centering sleeve grouting connecting joints are manufactured for reinforcing steel bars of each specification, the grouting quality is checked, the grouting sleeve to be constructed is detected, slag inclusion, cold shut, sand holes, air holes and cracks do not exist on the surface of the grouting sleeve, and quality defects influencing the use performance such as sharp edges and burrs do not exist outside the edge of the end surface and the outer surface of the grouting sleeve;
and S6, grouting, wherein according to grouting subareas, a non-plugging grouting hole is reserved in each area lower row of grouting holes and other grouting holes are plugged by rubber plugs or cork plugs, the stirred grouting material is poured into a grouting pump, the grouting pump is started, the pressure of the grouting pump is controlled to be 1Mpa, the flow rate of the grouting material is controlled to be 0.8-1.2L/min, when the grouting material flows out of a pressure hose, the grouting material is inserted into a steel sleeve grouting hole and is grouted from one side, when the grouting material is ejected from the corresponding upper grouting hole, a grouting sleeve is fully filled, and after the grouting hole is fully filled, the grouting hole is sequentially plugged by using a rubber plugging hole plug.
2. The high-rise building assembly type prefabricated wall panel steel bar grouting process according to claim 1, characterized in that: the sealing processing method comprises the following steps:
using a PVC pipe to the side surface of the wall body, transversely filling the PVC pipe into the wall seam, abutting against a sleeve steel bar to control the width of a sealing seam, using a base slurry to seal the side surface of the wall body between PVP pipes 3 to form a sealing seam base slurry, then using the base slurry to fill the rest seam, then drawing out the PVC pipe from the side surface, sealing the wall body to ensure that the periphery of the wall body is sealed tightly, wetting the position needing the base slurry to be sealed by using clean water before using the base slurry, then using the base slurry to seal, curing the base slurry for 6-8 hours, grouting after reaching the strength, then flushing water within hours before sealing the bin, using a water pipe with pressure to flush and wet the inside of the seam, ensuring that the seam is free of oil stain, floating slag and the like, using the PVC pipe as the sealing bin material to plug the horizontal seam of the component and the ground, generally placing the outer edge of the sealing mold, using hands to plug the base slurry into the seam after being agglomerated, and ensuring that the seam is tightly plugged, and then drawing out the plugging die to avoid disturbing the wiped material in the sealing bin as much as possible.
3. The high-rise building assembly type prefabricated wall panel steel bar grouting process according to claim 1, characterized in that: the bin dividing processing method comprises the following steps:
the base layer of the prefabricated wall board is subjected to bin dividing treatment through the seat slurry to form bin-divided seat slurry, the height of the seat slurry bin is 30mm, the width of the seat slurry bin is 48-52mm, the length of the seat slurry bin is 200mm, the seat slurry bin is triangular, the corresponding position on a wall is marked with chalk, holes are reserved at corners for exhausting air, the bin dividing distance is not more than 1.5m, bin dividing operation is carried out on a wall body with the length of more than 1.5m, the bin dividing distance is preferably 1.2-1.5m according to field experience, too large pressure in a sealed cabin during grouting easily causes bursting or extruding the seat slurry, and the situation that the slurry in the sealed cabin is not compact due to too large bin dividing distance can be caused.
4. The high-rise building assembly type prefabricated wall panel steel bar grouting process according to claim 1, characterized in that: the back lining material of the sealant at the joint is preferably a polyethylene plastic rod or foaming chloroprene rubber, and the diameter of the back lining material is not less than 1.5 times of the width of the joint.
5. The high-rise building assembly type prefabricated wall panel steel bar grouting process according to claim 1, characterized in that: the length allowable deviation of the grouting sleeve is +/-1 mm, the outer diameter allowable deviation is +/-1.5 mm, the wall thickness allowable deviation is +/-1.2 mm, the inner diameter allowable deviation of the annular protruding part of the anchoring section is +/-1.5 mm, and the difference between the minimum inner diameter size of the annular protruding part of the anchoring section and the nominal diameter of the steel bar is more than or equal to 10 mm.
6. The high-rise building assembly type prefabricated wall panel steel bar grouting process according to claim 1, characterized in that: the number of the grouting materials to be checked is the same as that of the grouting materials of the same component and the same batch number, and the grouting materials are a batch of no more than 50t, wherein the fineness modulus is determined to be 1.8 by using the sand grain diameter of less than or equal to 0.35mm according to the size of the grouting materials and the raw material ratio.
7. The high-rise building assembly type prefabricated wall panel steel bar grouting process according to claim 1, characterized in that: the grouting operation is finished within 30min after the grouting material is stirred by adding water, grouting is carried out in a grouting hole in the same bin, the grouting operation is continuously finished in one area, and the scattered grouting material mixture cannot be used for the second time.
8. The high-rise building assembly type prefabricated wall panel steel bar grouting process according to claim 1, characterized in that: the surplus mixture of grout construction can not add grout material, water again and use, and accomplish in the grout, the inspection has the shutoff to connect before the thick liquids initial set, if have the not closely knit condition of grout outlet hole thick liquids and in time mend the filling and handle, treats the grout solidification back, inspects grout sleeve department one by one and arranges the closely knit condition of thick liquids in the grout outlet hole, ensures the quality of every grout.
9. The high-rise building assembly type prefabricated wall panel steel bar grouting process according to claim 1, characterized in that: the high-rise building assembly type prefabricated wallboard reinforcing steel bar grouting pre-process comprises the following steps:
a. inspecting the permeability of the wallboard sleeve;
b. calibrating the steel bar before top pouring;
c. controlling the time scale height of top pouring;
d. roughening the grouting area;
e. installing and calibrating the wallboard;
f. sealing a bin with mortar;
d. the sealing effect was checked.
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