CN110593477B - Construction method of cast-in-situ reinforced concrete special-shaped inclined plate - Google Patents
Construction method of cast-in-situ reinforced concrete special-shaped inclined plate Download PDFInfo
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- CN110593477B CN110593477B CN201910546594.9A CN201910546594A CN110593477B CN 110593477 B CN110593477 B CN 110593477B CN 201910546594 A CN201910546594 A CN 201910546594A CN 110593477 B CN110593477 B CN 110593477B
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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
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
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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
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
- E04B7/04—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs supported by horizontal beams or the equivalent resting on the walls
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/02—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for rooms as a whole by which walls and floors are cast simultaneously, whole storeys, or whole buildings
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
Abstract
The invention discloses a construction method of a cast-in-situ reinforced concrete special-shaped inclined plate, which comprises the following steps: CAD lofting → measurement and positioning → template and steel bar processing → beam template support → outer wall outer side template installation → beam slab column wall steel bar and embedded pipeline binding → outer wall inner side template installation → template, steel bar inspection and acceptance → concrete pouring → concrete curing → form removal. The cast-in-place reinforced concrete slant special-shaped structure and the construction method of the member overcome the defects in the prior construction, the template is simple to manufacture, the size is accurate, the reinforcement is convenient and fast, the inclination of the member is accurately controlled, the concrete appearance quality is good, and the reference value is provided for the construction of similar projects.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a construction method of a cast-in-place reinforced concrete special-shaped inclined plate.
Background
The outer facade of a certain library engineering is shaped as an inclined roof conical building, and the building area is as follows: 4320.8m2The ground 3F, the frame shear structure and the total building height of 23.7m are multifunctional buildings which are specially used for collecting, arranging, storing and propagating documents and provide scientific, cultural, educational and scientific research institutions for utilization, and have high engineering quality requirements and high construction difficulty. The outer wall of the engineering with more than two layers adopts a special-shaped curved surface structure, the outer wall is composed of a plurality of outer wall panels with different directions and slopes, the slopes of the outer wall panels are 61-67 degrees, the thickness of the outer wall panels is 150mm, and the reinforcing bars are double-layer bidirectional reinforcing bars
The height of the outer wall sloping plate reaches 20 meters, and the outer wall sloping plate is round from one layerThe arc top plate starts to root, and because the arc is not easy to construct and pay off, and the inclination direction and the gradient of the external wall plate are complicated and diversified, great difficulty is brought to construction.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the defects of the prior art, the invention provides a construction method of a cast-in-place reinforced concrete special-shaped inclined plate.
The technical scheme is as follows: a construction method of a cast-in-situ reinforced concrete special-shaped inclined plate comprises the following steps:
CAD lofting → measurement and positioning → template and steel bar processing → beam template support → outer wall outer side template installation → beam slab column wall steel bar and embedded pipeline binding → outer wall inner side template installation → template, steel bar inspection and acceptance → concrete pouring → concrete curing → form removal; wherein:
before the template is laid, a sample is put, each plane is designed and numbered, the splicing part needs to use the saving as the principle, the blanking requirement of the plywood is correct, the plywood can be sawed down after being scribed by a square, and the large material and the small material are used;
before the outer wall inclined plate is erected, a beam intersected with an outer wall is erected firstly, the position and elevation of the partial structure are easy to control, the partial structure can be directly measured according to a control line and the elevation of the lower floor, the middle of the beam plate is arched, the arching height is about two thousandths of the span, the maximum central arching height is 20mm, an outer wall inclined column is installed after the beam template is installed and positioned, the inclined column is generally arranged at the position of a corner of the outer wall, the section projections of the inclined column at different elevation positions are not on the same plane, the position of the inclined column is controlled to have two section positions with the same elevation, in order to facilitate operation, the projection lines of the sections of the current floor and the upper floor are placed on the floor, the inclined column template can be smoothly installed according to the projection lines of the sections of the two floors, a 40 multiplied by 90 wood square is used for making secondary ridges, the distance
The steel pipe is used as a main ridge, the distance between the main ridges is 500mm, and the distance between the first main ridge and the floor is 150 mm; the external wall template can be installed according to the relative positions of the inclined columns and the beams, and 40 multiplied by 90 battens are adopted as secondary ridges and between the secondary ridgesAt a distance of 200mm, adopt
The steel pipe is used as a main ridge, the distance between the main ridges is 500mm, the distance between the first main ridge and the floor is 150mm, and the steel pipe is used
Reinforcing the screws, wherein the distance between the screws is 500 mm; when the outer wall inclined plate and the column formwork are erected, the inclined plate can only be used for erecting one formwork on the lower side, the column is firstly erected with formworks on the bottom surface and one side surface, then the outer wall inclined plate and the inclined column reinforcing steel bars are bound, and finally the outer wall inclined plate and the inclined column formwork sealing are carried out. Strictly controlling the engineering quality of the template, and entering the next procedure for construction after the position, the size and the gradient of the template are qualified through inspection and acceptance;
the reinforcing bar of outer wall swash plate is according to on-the-spot laying-out unloading processing, and the arrangement and the quantity of reinforcing bar must satisfy the drawing requirement, and earlier the ligature is close to the lower floor's reinforcing bar of template to fill up the concrete cushion that has the iron wire, then the ligature other layer reinforcing bar, will adopt reinforcing bar stirrup between the two-layer reinforcing bar, cushion and stirrup are 1000mm with great ease interval, and upper and lower floor's plate muscle is all fully pricked with the iron wire.
As an optimization: and (3) processing the template and the steel bars: the template size and the length of the reinforcing steel bars of the outer wall inclined plate cannot be directly measured from a drawing, the template size and the length of the reinforcing steel bars can be manufactured and blanked through calculation or field lofting, the length of the inclined plate is a sine value of the height of the inclined plate divided by the inclination angle of the inclined plate, field lofting can be performed by finding a flat ground, the side lines of the outer wall, the columns and the upper beam are firstly popped up on the flat ground, the crossing points must be popped accurately, then manufacturing lofting is performed according to the lines popped from the ground, template processing is performed according to the lofted large sample, and finally the engineering template is rapidly installed.
As an optimization: and (3) pouring the concrete: commercial concrete is adopted to smash the external wall panel, the water cement ratio of the incoming concrete is strictly controlled, the time of the external wall inclined panel concrete in the process of sinking is longer than that of a common vertical component, so layered pouring is required, and the layered height is controlled within 3 m; the concrete pouring adopts an inserted vibrator for vibrating, the concrete is vibrated along with the tamping, the vibration points are uniform, the concrete is inserted quickly and pulled slowly until the surface does not sink obviously, bubbles do not appear and the mortar is discharged, so as to ensure the compactness of the concrete pouring.
As an optimization: and (3) concrete curing: after the outer wall template is removed, a gunny bag or carpet cloth is adopted for watering and curing to keep the concrete surface in a moist state, the curing time is not less than 7 days and nights, and people are strictly prohibited to get on the concrete and work is carried out on the concrete during the curing period.
As an optimization: in the form removal: because the sloping plate of the outer wall has a larger gradient and a length close to 8 meters, the formwork support system needs to be dismantled after the concrete strength reaches 75 percent, the principle of' first supporting and then dismantling is maintained during dismantling, the dismantling is sequentially carried out from top to bottom, materials are strictly forbidden to be thrown from a high place during dismantling, a crow bar is strictly forbidden to be used for hard prying, edges and corners on the surface of the concrete cannot be damaged, and the materials are required to be sorted and stacked in order according to different varieties and specifications after the dismantling is finished.
As an optimization: before the construction of the external wall panel structure, technical personnel of organization construction and various workers are familiar with and review drawings to make a feasible construction method, and sample calculation software is used for checking the safety of the support frame, so that the safety and the practicability are achieved.
As an optimization: the material was prepared as follows: the external wall panel template adopts a 15mm thick multilayer board, the external wall panel supporting secondary edge adopts 40 multiplied by 90mm battens, and the supporting main edge adopts
And (5) steel pipes.
As an optimization: before construction, the scaffold operation layer is required to be fully paved with scaffold boards, maintenance railings, dense meshes and safety nets, and the scaffold operation layer is qualified through the inspection of professional safety personnel; the tower crane must ensure sufficient safety height and good operation; the electric saw, the electric planer and the portable vibrator have good mechanical performance.
Has the advantages that: the cast-in-place reinforced concrete slant special-shaped structure and the construction method of the member overcome the defects in the prior construction, the template is simple to manufacture, the size is accurate, the reinforcement is convenient and fast, the inclination of the member is accurately controlled, the concrete appearance quality is good, and the reference value is provided for the construction of similar projects.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below so that those skilled in the art can better understand the advantages and features of the present invention, and thus the scope of the present invention will be more clearly defined. The embodiments described herein are only a few embodiments of the present invention, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art without inventive faculty based on the embodiments described herein are intended to fall within the scope of the present invention.
Examples
1. Process flow
The construction of the special-shaped curved surface outer wall is different from the common concrete outer wall surface, and the pouring of concrete is difficult from the erection of a support frame to the laying and reinforcement of an outer wall template and the manufacturing and installation of reinforcing steel bars, and the process flow is as follows:
CAD lofting → measurement and positioning → template and steel bar processing → beam template support → outer wall outer side template installation → beam slab column wall steel bar and embedded pipeline binding → outer wall inner side template installation → template, steel bar inspection and acceptance → concrete pouring → concrete curing → form removal.
2. Preparation for construction
2.1 technical preparation
Before the construction of the outer wall plate structure, technicians of organization construction and various workers are familiar with and review drawings to make a feasible construction method, and sample calculation software is used for checking the safety of the support frame, so that the safety and the practicability are realized. Meanwhile, in the process of viewing the figure, omission, contradiction, problems possibly encountered in actual construction, doubts and the like in the drawing are arranged and gathered, and the problem is timely communicated with designers to be solved, so that the method makes full preparation for the construction technology of the external wall panel.
2.2 personnel preparation
The construction team selects a whole-building directly-affiliated construction team which participates in similar engineering construction and has strong strength, reasonably arranges labor force according to rated engineering quantity and previous construction experience, controls the internal worker technical grade proportion, determines reasonable labor organization, strengthens personnel height management through optimized combination, and carries out technical innovation so as to meet the requirements of construction peak periods on personnel and enable human resources to be fully and reasonably utilized. According to the construction drawing and the technical difficulty of the project, the detailed technical bottom-crossing and field actual operation simulation technical guidance for technical workers is carefully organized by combining the construction characteristics of the inclined plate structure and the actual situation of the project, and each worker is ensured to be familiar with the construction method and the process of the worker.
2.3 Material preparation
According to the construction requirements, the construction sequence and the material using plan, the materials are fed in time according to the construction material management system, and the requirements of the construction site are met; all main materials have to have ex-factory pass certificates, the steel pipes, the fasteners, the adjustable brackets and the templates and the battens are carefully checked and selected when entering a field, the steel pipes and the fasteners are sampled and inspected on the field before use after entering the field, the steel pipes and the fasteners are used after being detected to be qualified, the steel pipes and the fasteners are forbidden to be used when the defects of serious corrosion, cracks, depressions and the like occur, and the templates and the battens are made of certified products which are produced by normal manufacturers and have uniform specification and size, so that various materials are ensured to meet the design and use requirements. The external wall panel template adopts a 15mm thick multilayer board, the external wall panel supporting secondary edge adopts 40 multiplied by 90mm battens, and the supporting main edge adopts
And (5) steel pipes.
2.4 construction facility preparation:
2.4.1 safety: the construction of the external wall panel, the safety guarantee is the first, before the construction, must guarantee that the operation layer of scaffold has full spread scaffold board, maintenance railing, dense mesh net, safety net to qualified through professional security personnel's inspection.
2.4.2 construction machinery: the tower crane must be guaranteed a sufficient safety height and function well.
2.4.3 Small construction machines: the electric saw, the electric planer and the portable vibrator have good mechanical performance.
3. Construction method
3.1 processing of formworks and reinforcing bars
The template size and the length of the reinforcing steel bars of the outer wall inclined plate cannot be directly measured from a drawing, the outer wall inclined plate can be manufactured and blanked through calculation or field lofting, the length of the inclined plate is the sine value of the height of the inclined plate divided by the inclination angle of the inclined plate, the field lofting can be carried out by finding a flat ground, the side lines of the outer wall, the columns and the upper beam are firstly popped out on the flat ground, the crossing points must be popped accurately, then the manufacturing lofting is carried out according to the line popped from the ground, the template processing is carried out according to the lofted loft, and finally the engineering template is rapidly installed; the calculation method has the advantages that the blanking is complex, the field lofting is visual, and the fast and accurate blanking can be realized only by combining the two methods.
3.2 template fabrication, installation
The supporting of the outer wall sloping plate is different from the supporting of a common outer wall template, the control of the gradient of the outer wall sloping plate is difficult, and the sloping plate has a negative ridge and a positive ridge, and is triangular, so that the template laying cannot be carried out according to a conventional method, the waste of the template and a batten can be caused, and the construction cost is increased. Therefore, before the template is laid, a sample is put in, each plane is designed and numbered, the splicing part needs to use the principle of saving as a rule, the blanking requirement of the plywood is correct, the plywood can be sawed down after being scribed by a square, and a large material and a small material are used.
Before the outer wall inclined plate is erected, a beam intersected with an outer wall is erected firstly, the position and elevation of the partial structure are easy to control, the partial structure can be directly measured according to a control line and the elevation of the lower floor, the middle of the beam plate is arched, the arching height is about two thousandths of the span, the maximum arching height of the center is 20mm, an outer wall inclined column is installed after the beam template is installed and positioned, the inclined column is generally arranged at the position of a corner of the outer wall, the section projections of the inclined column at different elevation positions are not on the same plane, two elevation section positions are required to be arranged at the position of the control inclined column, the operation is convenient, the projection lines of the sections of the floor and the upper column are placed on the floor, and the two columns are broken according toThe projection line of the surface can be smoothly installed on the inclined column template, 40 multiplied by 90 battens are adopted for secondary ridges, the distance between the secondary ridges is 200mm, and the inclined column template is adopted
The steel pipe is used as a main ridge, the distance between the main ridges is 500mm, and the distance between the first main ridge and the floor is 150 mm; the external wall template can be installed according to the relative positions of the inclined columns and the beams, the 40 multiplied by 90 battens are adopted to make secondary ridges, the distance between the secondary ridges is 200mm, and the secondary ridges are adopted
The steel pipe is used as a main ridge, the distance between the main ridges is 500mm, the distance between the first main ridge and the floor is 150mm, and the steel pipe is used
The screw rods are reinforced, and the screw rod spacing is 500 mm. When the outer wall inclined plate and the column formwork are erected, the inclined plate can only be used for erecting one formwork on the lower side, the column is firstly erected with formworks on the bottom surface and one side surface, then the outer wall inclined plate and the inclined column reinforcing steel bars are bound, and finally the outer wall inclined plate and the inclined column formwork sealing are carried out. The engineering quality of the template is strictly controlled, and the next procedure can be carried out after the position, the size and the gradient of the template are qualified through inspection and acceptance.
3.3 fabrication and installation of reinforcing steel bars
The reinforcing bar of outer wall swash plate is according to on-the-spot laying-out unloading processing, and the arrangement and the quantity of reinforcing bar must satisfy the drawing requirement, and earlier the ligature is close to the lower floor's reinforcing bar of template to fill up the concrete cushion that has the iron wire, then the ligature other layer reinforcing bar, will adopt reinforcing bar stirrup between the two-layer reinforcing bar, cushion and stirrup are 1000mm with great ease interval, and upper and lower floor's plate muscle is all fully pricked with the iron wire.
3.4 concrete pouring
The concrete pouring avoids the construction in rainy days so as to ensure the construction quality of the external wall panel. Commercial concrete is adopted to smash the external wall panel, and the water cement ratio of the incoming concrete is strictly controlled. The time of the outer wall inclined plate concrete in the process of sinking is longer than that of a common vertical component, so that the outer wall inclined plate concrete is poured in a layered mode, and the layered height is controlled within 3 m; the concrete pouring adopts an inserted vibrator for vibrating, the concrete is vibrated along with the tamping, the vibration points are uniform, the concrete is inserted quickly and pulled slowly until the surface does not sink obviously, bubbles do not appear and the mortar is discharged, so as to ensure the compactness of the concrete pouring.
3.5 curing of concrete
The construction of the outer wall inclined plate is influenced by aspects of high-altitude operation, gradient size, shape change and the like, and the formwork support, concrete pouring and concrete curing are difficult. Because the outer wall panel has large gradient and is not easy to store water, the water loss is fast, and people are difficult to water up and down, the maintenance work is needed to be specially done. After the outer wall template is removed, a gunny bag or carpet cloth is adopted for watering and curing to keep the concrete surface in a moist state, the curing time is not less than 7 days and nights, and people are strictly prohibited to get on the concrete and work is carried out on the concrete during the curing period.
3.6 form removal
Because the sloping plate of the outer wall has a larger gradient and a length close to 8 meters, the formwork support system needs to be dismantled after the concrete strength reaches 75 percent, the principle of' first supporting and then dismantling is maintained during dismantling, the dismantling is sequentially carried out from top to bottom, materials are strictly forbidden to be thrown from a high place during dismantling, a crow bar is strictly forbidden to be used for hard prying, edges and corners on the surface of the concrete cannot be damaged, and the materials are required to be sorted and stacked in order according to different varieties and specifications after the dismantling is finished.
4. Quality control and product protection
In the construction process of the outer wall inclined plate, construction and quality acceptance must be strictly carried out according to the requirements of the acceptance criteria of the construction quality of concrete engineering (GB50204-2015), and the quality acceptance of the main control project and the general project of the sub-projects of templates, reinforcing steel bars, concrete and the like must meet the requirements of the specifications.
4.1 template lofting needs to reduce the number of abutted seams of the board surface as much as possible, and simultaneously, the geometric dimension, the curvature and the smoothness meet the design requirements.
4.2 the external wall template should be placed stably, and should be lightly taken and placed in construction to prevent deformation; in order to ensure the appearance effect and prevent slurry leakage, single-sided paper adhesive tapes are adhered to corners of the template and the larger part of the abutted seam, so that the abutted seam quality of the template is ensured.
4.3, when the template is dismantled, the procedure is carried out, and a release agent is coated in time; the template is strictly forbidden to be knocked by a sledge hammer or pried by a crow bar.
4.4 the different unloading length, reinforcing bar joint position, overlap joint length, anchor length, end crotch etc. of batter post wallboard are considered to reinforcing bar turning over appearance key.
4.5 the steel bar positioning and protecting layer is combined by concrete cushion block and steel bar stirrup to control the thickness of the steel bar protecting layer.
4.6 in order to prevent the concrete structure and the member from cracking, the mixing proportion and the slump of the concrete are well controlled, and the vibration and the maintenance work of the concrete are enhanced.
5. Safety measures
5.1 before the scaffold is erected, safety and technical trade-off needs to be made for the erection and use personnel according to the safety technical specification of the fastener type steel pipe scaffold for building construction JGJ130-2011 and the requirements of construction organization design and special construction schemes.
And 5.2, erecting a support steel pipe scaffold according to the building construction fastener type steel pipe scaffold safety technical regulation, and erecting protective railings and safety nets around the floor slab of the operation layer to ensure that the protection is in place.
5.3 all the electric facilities need to be wired according to the regulations, a leakage protector is installed, the night construction needs enough illumination, and various power lines use insulated wires and are not allowed to be directly fixed on the steel bars.
5.4 combustible materials such as templates and the like are piled away from a fire source and equipped with fire-fighting equipment.
And 5.5, on the construction site, a full-time safety worker and an on-duty electrician are dispatched, the implementation safety measures are checked, and the problems are found and corrected in time.
The cast-in-place reinforced concrete slant special-shaped structure and the construction method of the member overcome the defects in the prior construction, the template is simple to manufacture, the size is accurate, the reinforcement is convenient and fast, the inclination of the member is accurately controlled, the concrete appearance quality is good, and the reference value is provided for the construction of similar projects.
Claims (8)
1. A construction method of a cast-in-situ reinforced concrete special-shaped inclined plate is characterized in that: the method comprises the following steps:
CAD lofting → measurement and positioning → template and steel bar processing → beam template support → outer wall outer side template installation → beam slab column wall steel bar and embedded pipeline binding → outer wall inner side template installation → template, steel bar inspection and acceptance → concrete pouring → concrete curing → form removal; wherein:
before the template is laid, a sample is put, each plane is designed and numbered, the splicing part needs to use the saving as the principle, the blanking requirement of the plywood is correct, the plywood can be sawed down after being scribed by a square, and the large material and the small material are used;
before the outer wall inclined plate is erected, a beam intersected with an outer wall is erected firstly, the position and elevation of the partial structure are easy to control, the beam is directly measured according to a control line and the elevation of the lower floor, the middle of the beam plate is arched, the arching height is two thousandths of the span, the maximum arching height of the center is 20mm, the outer wall inclined column is installed after the beam template is installed and positioned, the inclined column is located at the corner of the outer wall, the section projections of the inclined column at different elevation positions are not located on the same plane, the position of the inclined column is controlled to have two section positions with the same height, for convenience of operation, the projection lines of the sections of the upper and lower columns are placed on the floor of the floor, the inclined column template installation can be smoothly carried out according to the projection lines of the sections of the two layers of columns, 40 multiplied by 90 wood is used for secondary ridges, the distance between
The steel pipe is used as a main ridge, the distance between the main ridges is 500mm, and the distance between the first main ridge and the floor is 150 mm; the external wall template can be installed according to the relative positions of the inclined columns and the beams, the 40 multiplied by 90 battens are adopted to make secondary ridges, the distance between the secondary ridges is 200mm, and the secondary ridges are adopted
The steel pipe is used as a main ridge, the distance between the main ridges is 500mm, the distance between the first main ridge and the floor is 150mm, and the steel pipe is used
Reinforcing the screws, wherein the distance between the screws is 500 mm; when the outer wall inclined plate and the column formwork are erected, the inclined plate can only be erected with one formwork on the lower side, the column is erected with the formwork on the bottom and one side, then the outer wall inclined plate and the inclined column reinforcing steel bars are bound, and finally the outer wall inclined plate and the inclined column formwork sealing are carried out(ii) a Strictly controlling the engineering quality of the template, and entering the next procedure for construction after the position, the size and the gradient of the template are qualified through inspection and acceptance;
the reinforcing bar of outer wall swash plate is according to on-the-spot laying-out unloading processing, and the arrangement and the quantity of reinforcing bar must satisfy the drawing requirement, and earlier the ligature is close to the lower floor's reinforcing bar of template to fill up the concrete cushion that has the iron wire, then the ligature other layer reinforcing bar, will adopt reinforcing bar stirrup between the two-layer reinforcing bar, cushion and stirrup are 1000mm with great ease interval, and upper and lower floor's plate muscle is all fully pricked with the iron wire.
2. The construction method of the cast-in-situ reinforced concrete special-shaped inclined plate according to claim 1, characterized in that: and (3) processing the template and the steel bars: the template size and the length of the reinforcing steel bars of the outer wall inclined plate can not be directly measured from a drawing, the template size and the length of the reinforcing steel bars of the outer wall inclined plate can not be directly measured, the template can be manufactured and blanked through calculation or field lofting, the length of the inclined plate is a sine value of the height of the inclined plate divided by the inclination angle of the inclined plate, field lofting is carried out by finding a flat ground, the side lines of the outer wall, the columns and the upper beam are firstly popped up on the flat ground, the crossing points must be popped accurately, then manufacturing lofting is carried out according to the line popped from the ground, template processing is carried.
3. The construction method of the cast-in-situ reinforced concrete special-shaped inclined plate according to claim 1, characterized in that: and (3) pouring the concrete: commercial concrete is adopted to smash the external wall panel, the water cement ratio of the incoming concrete is strictly controlled, the time of the external wall inclined panel concrete in the process of sinking is longer than that of a common vertical component, so layered pouring is required, and the layered height is controlled within 3 m; the concrete pouring adopts an inserted vibrator for vibrating, the concrete is vibrated along with the tamping, the vibration points are uniform, the concrete is inserted quickly and pulled slowly until the surface does not sink obviously, bubbles do not appear and the mortar is discharged, so as to ensure the compactness of the concrete pouring.
4. The construction method of the cast-in-situ reinforced concrete special-shaped inclined plate according to claim 1, characterized in that: and (3) concrete curing: after the outer wall template is removed, a gunny bag or carpet cloth is adopted for watering and curing to keep the concrete surface in a moist state, the curing time is not less than 7 days and nights, and people are strictly prohibited to get on the concrete and work is carried out on the concrete during the curing period.
5. The construction method of the cast-in-situ reinforced concrete special-shaped inclined plate according to claim 1, characterized in that: in the form removal: because the sloping plate of the outer wall has a larger gradient and a length close to 8 meters, the formwork support system needs to be dismantled after the concrete strength reaches 75 percent, the principle of' first supporting and then dismantling is maintained during dismantling, the dismantling is sequentially carried out from top to bottom, materials are strictly forbidden to be thrown from a high place during dismantling, a crow bar is strictly forbidden to be used for hard prying, edges and corners on the surface of the concrete cannot be damaged, and the materials are required to be sorted and stacked in order according to different varieties and specifications after the dismantling is finished.
6. The construction method of the cast-in-situ reinforced concrete special-shaped inclined plate according to claim 1, characterized in that: before the construction of the external wall panel structure, technical personnel of organization construction and various workers are familiar with and review drawings to make a feasible construction method, and sample calculation software is used for checking the safety of the support frame, so that the safety and the practicability are achieved.
7. The construction method of the cast-in-situ reinforced concrete special-shaped inclined plate according to claim 1, characterized in that: the material was prepared as follows: the external wall panel template adopts a 15mm thick multilayer board, the external wall panel supporting secondary edge adopts 40 multiplied by 90mm battens, and the supporting main edge adopts
And (5) steel pipes.
8. The construction method of the cast-in-situ reinforced concrete special-shaped inclined plate according to claim 1, characterized in that: before construction, the scaffold operation layer is required to be fully paved with scaffold boards, maintenance railings, dense meshes and safety nets, and the scaffold operation layer is qualified through the inspection of professional safety personnel; the tower crane must ensure sufficient safety height and good operation; the electric saw, the electric planer and the portable vibrator have good mechanical performance.
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| CN112343331A (en) * | 2020-10-10 | 2021-02-09 | 上海建工七建集团有限公司 | Method for erecting special-shaped curved surface bare concrete formwork |
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| CN204456655U (en) * | 2014-12-24 | 2015-07-08 | 浙江创涌建筑科技有限公司 | A kind of overlength composite steel concrete column batter post structure |
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| CN204456655U (en) * | 2014-12-24 | 2015-07-08 | 浙江创涌建筑科技有限公司 | A kind of overlength composite steel concrete column batter post structure |
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