阅读说明：本技术 一种pc构件的制作工艺 (Manufacturing process of PC (polycarbonate) component ) 是由 麻新闻 轩照威 丁海峰 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种PC构件的制作工艺,钢筋下料、成品骨架制作,模台清扫,画线定位,模具制作,模具安装,涂脱模剂,钢筋绑扎、入模,工装安装固定,布砼振捣,抹面、收光,拉毛,养护,构件脱模,构件修补,堆场堆放,发货装车,通过本工艺制得的PC构件,表面平整无毛刺,没有色差,各处修补的地方也具有较强的应力,具有极高的平整度,品质大大提升,蒸养按照静停——升温——恒温——降温四个阶段进行,首先静停2h；升温2～3h,升温速度控制在15摄氏度/h；恒温不小于4小时,恒温时段温度保持在55±2摄氏度；降温3h,降温速度控制在10摄氏度/h,保证PC构件有较强的结构强度。(The invention discloses a manufacturing process of a PC (polycarbonate) component, which comprises the steps of blanking reinforcing steel bars, manufacturing a finished product framework, cleaning a die table, marking and positioning, manufacturing a die, mounting the die, coating a release agent, binding reinforcing steel bars, putting the reinforcing steel bars into the die, mounting and fixing a tool, distributing concrete, vibrating, plastering, finishing, galling, maintaining, demoulding the component, repairing the component, stacking in a yard, and delivering goods and loading, wherein the PC component manufactured by the process is smooth in surface, free of burrs and color difference, strong in stress at each repaired position, extremely high in flatness, greatly improved in quality, and steam cured according to four stages of standing, heating, constant temperature and cooling, and is firstly statically stopped for 2 hours; heating for 2-3 h, wherein the heating speed is controlled at 15 ℃ per hour; keeping the constant temperature for not less than 4 hours, and keeping the temperature at 55 +/-2 ℃ in the constant temperature period; the temperature is reduced for 3 hours, the temperature reduction speed is controlled at 10 ℃ per hour, and the PC component is guaranteed to have stronger structural strength.)

1. A manufacturing process of a PC component is characterized in that: the method comprises the following steps:

the method comprises the following steps: blanking reinforcing steel bars, manufacturing a finished product framework, strictly batching according to a reinforcing steel bar distribution list, stacking the reinforcing steel bars of various specifications in a classified mode, enabling the bent arc inner diameter of the bent reinforcing steel bars to meet the standard requirement, and making hooks at the tail ends of stirrups and lacing wires according to the design requirement; after the reinforcing cage is manufactured and molded, actual measurement inspection is carried out according to the specified requirements, and after the inspection is qualified, the reinforcing cage is stacked in a classified manner and supported by a batten or stored on a rack;

step two: cleaning a mould table, cleaning residual concrete and welding spots on the surface of the mould table, polishing and flattening, cleaning the inner side and the outer side of the mould, and cleaning concrete, sundries and the like on the surface of the mould; plugging the hole on the die table by using a plastic hole plugging plug, and polishing after plugging; after the mould is cleaned, cleaning the interior of the template by using dry cloth;

step three: drawing lines, positioning and snapping lines, positioning and fixing the snapping lines on the bottom surface of the template according to requirements, and confirming that the distorted and warped seams are within an allowable range; splicing the die, and fixing the position of the die plate by pins and screws after splicing the die;

step four: manufacturing a mould;

step five: installing a die, and manufacturing the die according to the size of the component drawing by a die assembly method; positioning and fixing the elastic lines on the bottom surface of the template according to requirements, and confirming that the distortion, the warpage and the joint are all in an allowable range; the assembly of the dies is carried out according to the assembly sequence, and the special members and the special dies requiring the assembly of the reinforcing steel bars after the entering of the dies are strictly carried out according to the operation steps; the assembly of the die is firm in connection and tight in gap, and the fixing modes of bolts, positioning pins, magnetic boxes and the like between the die and the die table are reliable, so that slurry leakage during vibration is prevented; when the die is assembled, the flatness of a contact surface of the die plate, the bending of the plate surface, the assembling gap, the geometric dimension and the like meet the related design requirements, and the allowance deviation of the geometric dimension of the die is specified;

step six: coating a release agent, wherein before the release agent is coated, the interior of the mold is ensured to be free of other impurity pollutants; firstly, coating the side surfaces of the inner side mold, the outer side mold and the movable end mold with a release agent by using a sponge brush, and then coating the bottom mold of the mold table, wherein the release agent is uniform and cannot accumulate liquid; when the release agent is coated, the gesture direction is kept consistent;

step seven: binding the steel bars, entering a mold, wherein the steel bar mesh and the steel bar framework meet the requirements of a component design drawing, a special steel bar positioning piece is suitable to be adopted, and the entering mold meets the following requirements: the size of the steel bar framework is accurate, and a special hanger with multiple hanging points is adopted when the framework is hoisted, so that the framework is prevented from deforming; the protective layer cushion block is preferably a plastic cushion block and is firmly clamped with the steel bar framework or the net piece; the spacing meets the requirements of limiting the reinforcing steel bars and controlling deformation; the steel bar framework is straight and has no damage when entering a mould, and the surface of the steel bar framework is not polluted by oil; after the reinforcing steel bar mesh or the framework is arranged in a die, the position, specification, spacing, thickness and the like of the reinforcing steel bar are checked according to the requirements of a design drawing, and the allowable deviation and the inspection method are in accordance with relevant regulations;

step eight: the tool is fixedly installed, an embedded part, a bolt hole and a reserved hole on the surface of the prefabricated part are configured according to a part template, and the reserved and embedded quality requirements and allowable deviation and a detection method meet relevant regulations;

step nine: distributing concrete, vibrating, uniformly and continuously pouring concrete, laying and discharging concrete, wherein the height of the concrete is below a reasonable value, and the feeding amount is controlled by a budget formula amount; when concrete is poured, the mould, the door and window frame, the embedded part and the connecting piece are ensured not to deform or move, and measures are taken to correct in time if deviation exists; the concrete pouring adopts a vibrating rod with a phi 50 model, the vibrating rod is prevented from touching a mould and fixing embedded parts in the vibrating process, narrow parts such as an outer frame are quickly inserted and slowly pulled to vibrate by using an ultrafine vibrating rod or a portable vibrating rod, the vibrating rod is vertical to the surface of the concrete and is quickly inserted and slowly pulled to uniformly vibrate, and when the surface of the concrete has no obvious collapse, cement paste appears and bubbles do not appear, the vibrating of the part is finished;

step ten: plastering and finishing, wherein the concrete surface is required to be plastered by a trowel, a foam rod is arranged in the embedded part to protect a screw thread opening, when finishing and finishing, a small amount of water is carried, and finishing are carried out for multiple times to achieve the effect that the surface is like a mirror;

step eleven: napping, after smearing, when a forefinger slightly presses down a dent with the depth of about 2mm, namely the optimal napping time, the napping depth is not less than 4mm, and napping is carried out by adopting a self-made tool;

step twelve: curing, namely curing the concrete of the project by adopting methods such as steam curing, and when steam curing is carried out on an original production mould position, covering oil cloth on the surface to form a steam curing cover, and introducing steam into the steam curing cover; the steam curing is carried out according to four stages of standing, temperature rising, constant temperature and temperature lowering; firstly, standing for 2 hours; heating for 2-3 h, wherein the heating speed is controlled at 15 ℃ per hour; keeping the constant temperature for not less than 4 hours, and keeping the temperature at 55 +/-2 ℃ in the constant temperature period; cooling for 3h, and controlling the cooling speed at 10 ℃ per hour;

step thirteen: demolding the component, wherein the mold is removed in strict sequence; when the component is demoulded, the connecting part between the component and the mould is carefully checked and confirmed to be completely dismantled and then lifted; when the precast concrete member is demolded and hoisted, the compressive strength of the concrete cube cured under the same conditions is determined according to design requirements, and if no specific requirement exists, the concrete cube can be demolded and hoisted when the compressive strength reaches more than 15 MPa; the hoisting of the components is stable, the horizontal components are hoisted by adopting special multipoint hoisting frames, and the complex components are hoisted by adopting special hoisting frames;

fourteen steps: repairing the component, namely cleaning the surface of the component, cleaning the surface by using a hammer, a steel hairpin and a polishing machine, and removing floating ash on the surface by using a brush and a blower to ensure that the surface of the component is clean; secondly, repairing and surface repairing the component, namely mixing the white cement and the black cement with the glue according to a certain proportion, and if the material of the glue is better, adding a certain amount of water to mix the repaired cement paste, wherein the viscosity of the cement paste is moderate; if the defects of the component are large, the ultra-early strength cement and the glue are mixed for first repairing and filling, and then the surface is repaired for the second time; repairing edges and corners, namely, cleaning damaged surfaces of positions with larger sizes of edge breakage and corner breakage, removing floating slag, brushing a joint surface with structural adhesive, repairing with high-strength mortar, maintaining for not less than 48 hours after repairing, and finally performing necessary surface modification to discard positions which cannot meet the standard requirements; repairing holes, honeycombs and pitted surfaces, cleaning the surfaces, then leveling the exposed rib parts by using cement mortar doped with fine sand, and for deeper holes, removing surface concrete, observing the internal structure, performing grouting treatment without influencing the compactness and otherwise discarding; other repairing, namely repairing sand spots, sand lines, peeling and stains by using cement paste containing fine sand, and polishing and cleaning by using sand paper; polishing, namely sleeving abrasive paper of No. 100 or No. 120 on an abrasive paper frame for polishing after the cement of the repaired surface is dried; eliminating color difference, and dipping the whole component surface with sponge to dip cement dry powder to reduce the color difference between the component original and the repair area;

step fifteen: stacking in a storage yard, moving the components from a production line to a PC storage area by using a flat car, placing the components on a designated storage rack and fixing the components by using pins, wherein a certain distance is kept between the two plates; when the component enters the storage rack, the balance of the component is adjusted, and the crane hook cannot move downwards and loosen before the pin does not fix the component; the terrace of the storage yard must be solid and level, the bottom of the yard adopts the bolster, the placement position is correct, guarantee the piling of finished products is in steady state; hard plastic materials are placed on the wood skid, and the skid must be aligned up and down;

sixthly, the steps are as follows: and (6) delivering and loading.

2. The process of claim 1, wherein the process comprises: the specification requirement of the inner diameter of the bent arc of the bent steel bar in the first step is that the plain round steel bar is not less than 2.5 times of the diameter of the steel bar, and the ribbed steel bars of 335MPa grade and 400MPa grade are not less than 4 times of the diameter of the steel bar.

3. The process of claim 1, wherein the process comprises: and in the ninth step, the reasonable height value of the concrete during laying and discharging is 50 cm.

4. The process of claim 1, wherein the process comprises: in the step fourteen, the proportion of the white cement, the black cement and the glue is that the white cement: black cement =1: 2.

5. The process of claim 1, wherein the process comprises: the ratio of white cement to black cement in the cement dry powder in the step fourteen is 1: 1.

Technical Field

The invention relates to the technical field of manufacturing of PC components, in particular to a manufacturing process of a PC component.

Background

PC is an english abbreviation and is referred to as PC component in the field of home industrialization. Such as prefabricated reinforced concrete column foundation, prefabricated steel structure steel column foundation, street lamp billboard column reinforced concrete foundation and prefabricated floor slab. The corresponding traditional cast-in-place concrete needs site moulding, site pouring and site maintenance. The concrete prefabricated member is widely applied to the fields of buildings, traffic, water conservancy and the like, and plays an important role in national economy.

A lot of PC component surfaces on the market have the burr at present, when the construction, still need polish once more to the surface, and is consuming time and labouring, and when the construction, because repair more random, the easy emergence edges and corners drops, the condition of fracture and appearance colour difference influences the engineering quality moreover, consequently, a demand for an improved technique solves this problem that exists among the prior art.

Disclosure of Invention

The present invention is directed to a process for manufacturing a PC component, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a manufacturing process of a PC component comprises the following steps:

the method comprises the following steps: blanking reinforcing steel bars, manufacturing a finished product framework, strictly batching according to a reinforcing steel bar distribution list, stacking the reinforcing steel bars of various specifications in a classified mode, enabling the bent arc inner diameter of the bent reinforcing steel bars to meet the standard requirement, and making hooks at the tail ends of stirrups and lacing wires according to the design requirement; after the reinforcing cage is manufactured and molded, actual measurement inspection is carried out according to the specified requirements, and after the inspection is qualified, the reinforcing cage is stacked in a classified manner and supported by a batten or stored on a rack;

step two: cleaning a mould table, cleaning residual concrete and welding spots on the surface of the mould table, polishing and flattening, cleaning the inner side and the outer side of the mould, and cleaning concrete, sundries and the like on the surface of the mould; plugging the hole on the die table by using a plastic hole plugging plug, and polishing after plugging; after the mould is cleaned, cleaning the interior of the template by using dry cloth;

step three: drawing lines, positioning and snapping lines, positioning and fixing the snapping lines on the bottom surface of the template according to requirements, and confirming that the distorted and warped seams are within an allowable range; splicing the die, and fixing the position of the die plate by pins and screws after splicing the die;

step four: manufacturing a mould;

step five: installing a die, and manufacturing the die according to the size of the component drawing by a die assembly method; positioning and fixing the elastic lines on the bottom surface of the template according to requirements, and confirming that the distortion, the warpage and the joint are all in an allowable range; the assembly of the dies is carried out according to the assembly sequence, and the special members and the special dies requiring the assembly of the reinforcing steel bars after the entering of the dies are strictly carried out according to the operation steps; the assembly of the die is firm in connection and tight in gap, and the fixing modes of bolts, positioning pins, magnetic boxes and the like between the die and the die table are reliable, so that slurry leakage during vibration is prevented; when the die is assembled, the flatness of a contact surface of the die plate, the bending of the plate surface, the assembling gap, the geometric dimension and the like meet the related design requirements, and the allowance deviation of the geometric dimension of the die is specified;

step six: coating a release agent, wherein before the release agent is coated, the interior of the mold is ensured to be free of other impurity pollutants; firstly, coating the side surfaces of the inner side mold, the outer side mold and the movable end mold with a release agent by using a sponge brush, and then coating the bottom mold of the mold table, wherein the release agent is uniform and cannot accumulate liquid; when the release agent is coated, the gesture direction is kept consistent;

step seven: binding the steel bars, entering a mold, wherein the steel bar mesh and the steel bar framework meet the requirements of a component design drawing, a special steel bar positioning piece is suitable to be adopted, and the entering mold meets the following requirements: the size of the steel bar framework is accurate, and a special hanger with multiple hanging points is adopted when the framework is hoisted, so that the framework is prevented from deforming; the protective layer cushion block is preferably a plastic cushion block and is firmly clamped with the steel bar framework or the net piece; the spacing meets the requirements of limiting the reinforcing steel bars and controlling deformation; the steel bar framework is straight and has no damage when entering a mould, and the surface of the steel bar framework is not polluted by oil; after the reinforcing steel bar mesh or the framework is arranged in a die, the position, specification, spacing, thickness and the like of the reinforcing steel bar are checked according to the requirements of a design drawing, and the allowable deviation and the inspection method are in accordance with relevant regulations;

step eight: the tool is fixedly installed, an embedded part, a bolt hole and a reserved hole on the surface of the prefabricated part are configured according to a part template, and the reserved and embedded quality requirements and allowable deviation and a detection method meet relevant regulations;

step nine: distributing concrete, vibrating, uniformly and continuously pouring concrete, laying and discharging concrete, wherein the height of the concrete is below a reasonable value, and the feeding amount is controlled by a budget formula amount; when concrete is poured, the mould, the door and window frame, the embedded part and the connecting piece are ensured not to deform or move, and measures are taken to correct in time if deviation exists; the concrete pouring adopts a vibrating rod with a phi 50 model, the vibrating rod is prevented from touching a mould and fixing embedded parts in the vibrating process, narrow parts such as an outer frame are quickly inserted and slowly pulled to vibrate by using an ultrafine vibrating rod or a portable vibrating rod, the vibrating rod is vertical to the surface of the concrete and is quickly inserted and slowly pulled to uniformly vibrate, and when the surface of the concrete has no obvious collapse, cement paste appears and bubbles do not appear, the vibrating of the part is finished;

step ten: plastering and finishing, wherein the concrete surface is required to be plastered by a trowel, a foam rod is arranged in the embedded part to protect a screw thread opening, when finishing and finishing, a small amount of water is carried, and finishing are carried out for multiple times to achieve the effect that the surface is like a mirror;

step eleven: napping, after smearing, when a forefinger slightly presses down a dent with the depth of about 2mm, namely the optimal napping time, the napping depth is not less than 4mm, and napping is carried out by adopting a self-made tool;

step twelve: curing, namely curing the concrete of the project by adopting methods such as steam curing, and when steam curing is carried out on an original production mould position, covering oil cloth on the surface to form a steam curing cover, and introducing steam into the steam curing cover; the steam curing is carried out according to four stages of standing, temperature rising, constant temperature and temperature lowering; firstly, standing for 2 hours; heating for 2-3 h, wherein the heating speed is controlled at 15 ℃ per hour; keeping the constant temperature for not less than 4 hours, and keeping the temperature at 55 +/-2 ℃ in the constant temperature period; cooling for 3h, and controlling the cooling speed at 10 ℃ per hour;

step thirteen: demolding the component, wherein the mold is removed in strict sequence; when the component is demoulded, the connecting part between the component and the mould is carefully checked and confirmed to be completely dismantled and then lifted; when the precast concrete member is demolded and hoisted, the compressive strength of the concrete cube cured under the same conditions is determined according to design requirements, and if no specific requirement exists, the concrete cube can be demolded and hoisted when the compressive strength reaches more than 15 MPa; the hoisting of the components is stable, the horizontal components are hoisted by adopting special multipoint hoisting frames, and the complex components are hoisted by adopting special hoisting frames;

fourteen steps: repairing the component, namely cleaning the surface of the component, cleaning the surface by using a hammer, a steel hairpin and a polishing machine, and removing floating ash on the surface by using a brush and a blower to ensure that the surface of the component is clean; secondly, repairing and surface repairing the component, namely mixing the white cement and the black cement with the glue according to a certain proportion, and if the material of the glue is better, adding a certain amount of water to mix the repaired cement paste, wherein the viscosity of the cement paste is moderate; if the defects of the component are large, the ultra-early strength cement and the glue are mixed for first repairing and filling, and then the surface is repaired for the second time; repairing edges and corners, namely, cleaning damaged surfaces of positions with larger sizes of edge breakage and corner breakage, removing floating slag, brushing a joint surface with structural adhesive, repairing with high-strength mortar, maintaining for not less than 48 hours after repairing, and finally performing necessary surface modification to discard positions which cannot meet the standard requirements; repairing holes, honeycombs and pitted surfaces, cleaning the surfaces, then leveling the exposed rib parts by using cement mortar doped with fine sand, and for deeper holes, removing surface concrete, observing the internal structure, performing grouting treatment without influencing the compactness and otherwise discarding; other repairing, namely repairing sand spots, sand lines, peeling and stains by using cement paste containing fine sand, and polishing and cleaning by using sand paper; polishing, namely sleeving abrasive paper of No. 100 or No. 120 on an abrasive paper frame for polishing after the cement of the repaired surface is dried; eliminating color difference, and dipping the whole component surface with sponge to dip cement dry powder to reduce the color difference between the component original and the repair area;

step fifteen: stacking in a storage yard, moving the components from a production line to a PC storage area by using a flat car, placing the components on a designated storage rack and fixing the components by using pins, wherein a certain distance is kept between the two plates; when the component enters the storage rack, the balance of the component is adjusted, and the crane hook cannot move downwards and loosen before the pin does not fix the component; the terrace of the storage yard must be solid and level, the bottom of the yard adopts the bolster, the placement position is correct, guarantee the piling of finished products is in steady state; hard plastic materials are placed on the wood skid, and the skid must be aligned up and down;

sixthly, the steps are as follows: and (6) delivering and loading.

Preferably, the specification requirement of the inner diameter of the bent arc of the bent steel bar in the first step is that the plain round steel bar is not less than 2.5 times of the diameter of the steel bar, and the ribbed steel bars of 335MPa grade and 400MPa grade are not less than 4 times of the diameter of the steel bar.

Preferably, the reasonable value of the height of the concrete in the laying and emptying process in the ninth step is 50 cm.

Preferably, in the fourteenth step, the ratio of the white cement, the black cement and the glue is white cement: black cement =1: 2.

Preferably, the ratio of white cement to black cement in the cement dry powder in the step fourteen is 1: 1.

Compared with the prior art, the invention has the beneficial effects that:

(1) the PC component manufactured by the process has a smooth surface, no burrs and no color difference, and places repaired everywhere also have strong stress, extremely high flatness and greatly improved quality.

(2) Steam curing is carried out according to four stages of standing, temperature rising, constant temperature and temperature reduction, and the steam curing is firstly stood for 2 hours; heating for 2-3 h, wherein the heating speed is controlled at 15 ℃ per hour; keeping the constant temperature for not less than 4 hours, and keeping the temperature at 55 +/-2 ℃ in the constant temperature period; the temperature is reduced for 3 hours, the temperature reduction speed is controlled at 10 ℃ per hour, and the PC component is guaranteed to have stronger structural strength.

Drawings

FIG. 1 is a schematic view of the process of the present invention.

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, the present invention provides a technical solution: a manufacturing process of a PC component is characterized in that: the method comprises the following steps:

the method comprises the following steps: blanking of reinforcing steel bars, manufacturing of a finished product framework, strictly preparing according to reinforcing steel bars, stacking the reinforcing steel bars of various specifications in a classified mode, randomly placing the reinforcing steel bars randomly, and enabling the inner diameter of a bent arc of bent reinforcing steel bars to meet the standard requirement: the smooth round steel bar is not less than 2.5 times of the diameter of the steel bar, the 335 MPa-grade and 400 MPa-grade ribbed steel bars are not less than 4 times of the diameter of the steel bar (D is less than or equal to 25), and the tail ends of the stirrup and the lacing wire are hooked according to the design requirement; after the reinforcement cage is manufactured and molded, actually measuring and checking according to the specified requirements, after the reinforcement cage is qualified, stacking the reinforcement cage in a classified manner, wherein the reinforcement cage cannot be directly placed on the ground, and is supported by wood or stored on a rack; piling reinforcing steel bars, recycling waste reinforcing steel bars and falling hands in a wrapping and drying area for cleaning;

step two: cleaning a mould table, cleaning residual concrete and welding spots on the surface of the mould table, polishing and flattening, cleaning the inner side and the outer side of the mould, and cleaning concrete, sundries and the like on the surface of the mould; plugging the hole on the die table by using a plastic hole plugging plug, and polishing after plugging; after the mould is cleaned, cleaning the interior of the template by using dry cloth;

step three: drawing lines, positioning and snapping lines, positioning and fixing the snapping lines on the bottom surface of the template according to requirements, and confirming that the distorted and warped seams are within an allowable range; splicing the die, and fixing the position of the die plate by pins and screws after splicing the die;

step four: manufacturing a mould;

step five: installing a die, and manufacturing the die according to the size of the component drawing by a die assembly method; positioning and fixing the elastic lines on the bottom surface of the template according to requirements, and confirming that the distortion, the warping and the seams are all within an allowable range; the assembly of the dies is carried out according to the assembly sequence, and for special members and special dies requiring that reinforcing steel bars are firstly put into the dies and then assembled, the assembly is carried out strictly according to the operation steps; the assembly of the die is firm in connection and tight in gap, and the fixing modes of bolts, positioning pins, magnetic boxes and the like between the die and the die table are reliable, so that slurry leakage during vibration is prevented; when the die is assembled, the flatness of a contact surface of a template, the bending of a plate surface, an assembling gap, the geometric dimension and the like meet the requirements of related design and the specification of allowable deviation of the geometric dimension of the die;

step six: coating a release agent, wherein before the release agent is coated, the cleaning work of the interior of the mold needs to be in place, and no other impurity pollutants are ensured; firstly, coating the side surfaces of the inner side die, the outer side die and the movable end die with a release agent by using a sponge brush, and then coating the bottom die of the die table, wherein the release agent cannot be omitted and is required to be uniformly coated and liquid accumulation cannot occur; when the release agent is coated, the gesture direction is kept consistent;

step seven: binding of reinforcing steel bars, entering a mold, wherein the reinforcing mesh and the reinforcing cage meet the requirements of a component design drawing, a special reinforcing steel bar positioning piece is suitable to be adopted, and the entering mold meets the following requirements: the size of the steel bar framework is accurate, and a special hanger with multiple hanging points is adopted when the framework is hoisted, so that the framework is prevented from deforming; the protective layer cushion block is preferably a plastic cushion block and is firmly clamped with the steel bar framework or the net piece; the spacing meets the requirements of limiting the reinforcing steel bars and controlling deformation; the steel bar framework is straight and has no damage when entering a mould, and the surface of the steel bar framework is not polluted by oil; after the reinforcing steel bar mesh or the framework is arranged in a die, the position, specification, spacing, thickness and the like of the reinforcing steel bar are checked according to the requirements of a design drawing, and the allowable deviation and the checking method are in accordance with relevant regulations;

step eight: the tool is fixedly installed, an embedded part, a bolt hole and a reserved hole on the surface of the prefabricated part are configured according to a part template, and the reserved and embedded quality requirements and allowable deviation and the inspection method meet relevant regulations;

step nine: the concrete is distributed and vibrated, the concrete is uniformly and continuously poured, the concrete is laid and discharged, the height is below 50cm, the accuracy of the material feeding amount is controlled as much as possible when the member concrete is laid, and the material feeding amount is controlled according to the budget formula; before pouring, checking the mould, the bracket, the installed steel bar and the embedded part, and filling a hidden project acceptance sheet; during concrete pouring, the mould, the door and window frame, the embedded part and the connecting piece are ensured not to deform or move, and measures are taken to correct in time if deviation exists; the concrete is poured and adopted and is preferably selected to be a phi 50 type vibrating rod, attention is paid to avoid touching a mould and fixing embedded parts in the vibrating process, narrow parts such as an outer frame and the like are quickly inserted and slowly pulled to vibrate by using an ultrafine vibrating rod or a portable vibrating rod, the vibrating rod is perpendicular to the surface of the concrete and is quickly inserted and slowly pulled to uniformly vibrate, and when the surface of the concrete has no obvious collapse, cement paste appears and bubbles do not appear, the vibrating of the part is finished;

step ten: plastering and finishing, wherein the surface of concrete is required to be plastered by a trowel, the periphery of an embedded part cannot be covered by the concrete, a foam rod is arranged in the embedded part to protect a screw thread opening, when finishing and finishing, a small amount of water is carried out, large-amplitude water mixing is not allowed to occur, and finishing are carried out for many times to achieve the effect that the surface is like a mirror;

step eleven: napping, after smearing, when a forefinger slightly presses down a dent with the depth of about 2mm, namely the optimal napping time, the napping depth is not less than 4mm, and napping is carried out by adopting a self-made tool;

step twelve: curing, namely curing the concrete of the project by adopting methods such as steam curing, and when steam curing is carried out on an original production mould position, covering oil cloth on the surface to form a steam curing cover, and introducing steam into the steam curing cover; steam curing is carried out according to four stages of standing, temperature rising, constant temperature and temperature reduction, and standing for 2 hours; heating for 2-3 h (the heating speed is controlled at 15 ℃ per hour); keeping the temperature for not less than 4 hours (keeping the temperature at 55 +/-2 ℃ in a constant temperature period); cooling for 3h (the cooling speed is controlled at 10 ℃ per hour);

step thirteen: demolding the component, wherein the mold is removed in strict sequence; when the member is demoulded, the member can be lifted after the connecting part between the member and the mould is completely dismantled by careful inspection and confirmation; when the precast concrete member is demolded and lifted, the compressive strength of the concrete cube cured under the same conditions is determined according to design requirements, if no specific requirements exist, the concrete cube can be demolded and lifted only when the compressive strength reaches more than 15MPa (the concrete member can be lifted by teams and groups according to a lifting notice issued by a laboratory); the hoisting of the components is stable, the horizontal components are hoisted by adopting special multi-point hoisting frames, and the complex components are hoisted by adopting special hoisting frames;

fourteen steps: repairing the component, namely cleaning the surface of the component, cleaning the surface by using a hammer, a steel hairpin and a polishing machine, and removing floating ash on the surface by using a brush and a blower to ensure that the surface of the component is clean; secondly, repairing the component and repairing the surface, namely mixing white cement, black cement and glue according to a certain proportion (when no concrete is designed, the cement is white: black =1: 2), and if the glue material is better, adding certain water to mix the repaired cement paste, wherein the viscosity of the cement paste is moderate; if the component has larger defects, the super early strength cement and the glue are mixed for first repairing and filling, and then the surface is repaired for the second time (white cement, black cement and glue); repairing edges and corners, namely, cleaning damaged surfaces at positions with larger edge breakage and corner breakage sizes (more than 20 mm), removing scum, brushing a joint surface with structural adhesive, repairing with high-strength mortar (structural reinforcement or anti-crack fibers are added when the repaired surface is larger), preserving moisture and maintaining for not less than 48 hours after repairing is finished, and finally performing necessary surface modification, wherein the scrapping treatment that the standard requirements cannot be met is carried out after the scheme to be reported which exceeds the standard range is designed and is agreed by supervision; repairing holes, honeycombs and pitted surfaces, cleaning the surfaces, and trowelling the exposed rib parts with cement mortar doped with fine sand; for deeper holes, after removing surface concrete, observing an internal structure, carrying out grouting treatment without influencing the compactness, or else, discarding; other repairing, namely repairing sand spots, sand lines, peeling and stains by using cement paste containing fine sand, and polishing and cleaning by using sand paper; polishing, namely sleeving abrasive paper of No. 100 or No. 120 on an abrasive paper frame for polishing after the cement of the repaired surface is dried; eliminating color difference, coating the whole component surface by dipping the sponge with cement dry powder (white cement and black cement are in a ratio of 1: 1), reducing the color difference between the component original and the repaired area, taking care, and controlling the flatness of the component when polishing the PC component; after the component is repaired, controlling the color difference;

step fifteen: stacking in a storage yard, moving the components from a production line to a PC storage area by using a flat car, placing the components on a designated storage rack and fixing the components by using pins, wherein a certain distance is kept between the two plates without contact; when the component enters the storage rack, the balance of the component is required to be adjusted, the component cannot swing, and the crane hook cannot move downwards and loosen before the pin does not fix the component; the terrace of the storage yard must be solid and level, the bottom of the yard adopts the bolster, the placement position is correct, guarantee the piling of finished products is in steady state; hard plastic materials are placed on the wood skid, and the skid must be aligned up and down;

sixthly, shipping and loading, wherein a ① transport vehicle can adopt a large-tonnage truck or a flat trailer, ② needs to clearly direct a person and uniformly direct signals during hoisting operation, ③ different components are stacked according to size classification, support and shock absorption measures are firstly made on a carriage bottom plate during ④ loading to prevent the components from being damaged due to vibration during transportation, for example, two 100mm multiplied by 100mm through long battens are firstly laid on the carriage bottom plate during loading, 15mm above hard rubber pads or other flexible pads are padded on the battens, ⑤ upper and lower components are bound by anti-slip pads, upper components need to be firm, structural components need to be provided with anti-slip support pads, ⑥ components are orderly placed at specified positions according to a specified or numbering sequence after being transported into a site, the stacking place in the site needs to be firm so as to prevent sinking and deformation of the components, ⑦ stacking of the components needs to be stacked firmly, the pads need to be aligned up and down, stress points need to be on a line, ⑧ is properly protected when the components are loaded and unloaded, and a soft lifting appliance is needed.

The PC component manufactured by the process has a smooth surface without burrs and color difference, the positions repaired at all positions also have strong stress, the PC component has extremely high flatness, the quality is greatly improved, and the steam curing is carried out according to four stages of standing, temperature rising, constant temperature and temperature lowering, and is firstly stood for 2 hours; heating for 2-3 h, wherein the heating speed is controlled at 15 ℃ per hour; keeping the constant temperature for not less than 4 hours, and keeping the temperature at 55 +/-2 ℃ in the constant temperature period; the temperature is reduced for 3 hours, the temperature reduction speed is controlled at 10 ℃ per hour, and the PC component is guaranteed to have stronger structural strength.

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.