阅读说明：本技术 一种现浇钢筋砼异形斜板的施工方法 (Construction method of cast-in-situ reinforced concrete special-shaped inclined plate ) 是由 羌俊峰 黄坤坤 朱晓东 张栋平 汤学军 史淦华 陶进杰 顾兵 顾永祥 于 2019-06-24 设计创作，主要内容包括：本发明公开了一种现浇钢筋砼异形斜板的施工方法,包括如下步骤：CAD放样→测量定位→模板及钢筋加工→梁模板支设→外墙外侧模板安装→绑扎梁板柱墙钢筋和预埋管线→外墙内侧模板安装→模板、钢筋检查与验收→混凝土浇筑→混凝土养护→拆模。本发明的现浇钢筋砼斜向异形结构及构件施工方法,克服了以往施工中的不足,模板制作简单、尺寸准确、加固便捷,构件斜度控制准确、混凝土观感质量良好,为类似工程的施工提供了参考价值。(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.)

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 the outer wall is erected firstly, the position and the elevation of the partial structure are easy to control, the beam 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 an outer wall corner, the section projections of the inclined column at different elevation positions are not on the same plane, two section positions with the same elevation are required to be arranged at the position of the control inclined column, and the projection line of the sections of the layer and the upper column is convenient to operatePlacing on the floor, smoothly installing inclined column template according to the projection line of the cross section of the two-layer column, adopting 40 × 90 battens as secondary ridges with the spacing of 200mm, adoptingThe 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 adoptedThe 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 usedReinforcing 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.

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 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.

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 adoptsAnd (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.

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 barsThe height of the outer wall sloping plate reaches 20 meters, the outer wall sloping plate starts to root from the arc top plate of one layer, and because the arc is not easy to construct and pay off, and the inclination direction and the gradient of the outer wall sloping 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 distanceThe 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 adoptedThe 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 usedReinforcing 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 adoptsAnd (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.