A cast-in-place construction method for antique building wing corner concrete roof

Abstract

The present invention relates to a cast-in-place construction method for a wing corner concrete roof of an antique building. The present invention comprises cast-in-place concrete eaves beams, concrete step beams and concrete corner beams; a wooden box formwork is built on the basis of a construction scaffold of a roof frame wing corner roof; wooden fasteners are customized according to the warping curve after the wing corner is set out; concrete net rafters are prefabricated, and the concrete net rafters are positioned by wooden fasteners, and a three-dimensional leaky curved surface shape is formed after the concrete net rafters are positioned; and the leaky gaps of the leaky curved surface shape are filled with coal slag, and the shape of the wing corner curved surface is formed after being compacted; a concrete release agent is applied to the surface of the wing corner curved surface, and the roof steel bars are tied according to the shape of the wing corner curved surface, and concrete is poured to form a cast-in-place concrete roof, and the wing corner concrete roof is smoothed according to the curved surface shape; the formwork is removed after the coal slag is collected, and the coal slag is cleaned to complete the construction. The present invention solves the drawbacks of the difficulty of supporting the double-curved formwork of the wing corner roof of an antique building and the low reuse rate of the mold; the construction steps are simple and easy to operate, and the production cost of the wing corner concrete roof is saved.

Description

Technical Field

[0001] The invention relates to the technical field of reinforced concrete antique building construction, in particular to a cast-in-place construction method for an antique building wing corner concrete roof. Background Art

[0002] The roof structure of ancient Chinese buildings is generally a large wooden structure, which is composed of purlins, boards, beams, columns, beams, rafters, wooden bases, wooden eaves rafters, etc. With the advancement of earthquake-resistant technology and the application of modern design concepts, the traditional large wooden roof structure is gradually replaced by reinforced concrete structures. As an indispensable part of antique buildings, wooden eaves rafters are often difficult to be replaced by reinforced concrete because of their small structure, complexity and diversity.

[0003] The construction of reinforced concrete antique buildings involving wing corner roofs is often difficult. The hyperbolic formwork of the wing corner roofs of antique buildings is difficult, and the cast-in-place hyperbolic roof has high requirements on the material, production, installation and cost of the mold. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a cast-in-place construction method for the wing corner concrete roof of an antique building. The method does not involve a curved surface mold, but uses a flat box-type wooden formwork and fillers to make the mold. The process is simple, the material cost is low, and the material is easy to recycle and has a high reusability, which greatly saves costs.

[0005] In order to solve the above technical problems, the present invention provides a cast-in-place construction method for an antique building wing corner concrete roof, comprising the following steps:

[0006] S1: Build scaffolding, cast in-situ concrete eaves beams, concrete step beams and concrete corner beams; connect the concrete corner beams with the concrete eaves beams and concrete step beams respectively, and the concrete corner beams are inclined to the horizontal plane to form a roof skeleton;

[0007] S2: Build a wooden box formwork on the construction scaffolding of the roof frame corner roof to wrap the corner roof part;

[0008] S3: Customize wood fasteners according to the warping curve after wing angle lofting;

[0009] S4: Prefabricate concrete rafters, so that exposed steel bar heads are reserved on the back of the concrete rafters, and the concrete rafters are positioned by wooden fasteners. After the concrete rafters are positioned, a three-dimensional hollow curved surface is formed;

[0010] S5: Pour the coal slag into the wooden box mold under the guidance of the concrete rafter positioning, and fill the gaps of the hollow curved surface shape with the coal slag, and form the wing angle curved surface shape after compaction;

[0011] S6: Apply a layer of concrete release agent with a thickness of 3-5 mm on the outer surface of the wing angle curved surface, tie the roof steel bars according to the shape of the wing angle curved surface, the roof steel bars are radially distributed on the wing angle curved surface, weld the roof steel bars to the exposed steel bar heads reserved on the back of the concrete rafters, wait for the concrete release agent to dry naturally for 10-30 minutes, pour concrete to form a cast-in-place concrete roof, and smooth it according to the shape of the curved surface to form a wing angle concrete roof;

[0012] S7: After the curing period is over, the construction is completed by opening a hole in the wooden box formwork and collecting the coal slag, then removing the formwork and cleaning the coal slag on the lower surface of the wing corner concrete roof.

[0013] In one embodiment of the present invention, in step S1, the concrete eaves beam and the concrete step beam are both reinforced concrete cast-in-place flat beams, and the concrete corner beam is a reinforced concrete cast-in-place inclined beam.

[0014] In one embodiment of the present invention, in step S1, the concrete eaves beam and the concrete step beam are rectangular, and the concrete step beam is located above the concrete eaves beam.

[0015] In one embodiment of the present invention, in step S1, the slope of the concrete corner beam is 1:2.5.

[0016] In one embodiment of the present invention, in step S2, the wooden box mold is a wooden box-type mold supported by a scaffold.

[0017] In one embodiment of the present invention, in step S3, the wooden fasteners are wooden cushion components that are designed according to the warping and lofting of the roof.

[0018] In one embodiment of the present invention, in step S4, the prefabricated concrete groin rafter is a prefabricated reinforced concrete groin rafter component.

[0019] In one embodiment of the present invention, in step S4, a clamping groove is provided on the surface of the wooden fixture, and the concrete mesh rafter is clamped to the wooden fixture through the clamping groove.

[0020] In one embodiment of the present invention, in step S6, the concrete release agent comprises the following raw materials in parts by weight: 5-50 parts of rosin, 1-10 parts of engine oil, 50-150 parts of water, 0.1-5 parts of sodium carbonate, and 0.1-5 parts of methyl cellulose or carboxymethyl cellulose.

[0021] In one embodiment of the present invention, in step S6, concrete with a thickness of 10-15 cm is poured to form a cast-in-place concrete roof, and the concrete strength is C30.

[0022] The above technical solution of the present invention has the following advantages compared with the prior art:

[0023] The method for cast-in-place construction of a corner concrete roof of an antique building of the present invention has a simple structure, uses low-priced coal slag, has a high recycling rate, is convenient to construct and has a low cost. The present invention solves the problems of difficulty in supporting the double-curved formwork of the corner roof of an antique building and low mold recycling rate; at the same time, the construction steps are simple and easy to operate, which greatly saves the production cost of the corner concrete roof. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0025] Figure 1 It is a schematic diagram of the plan view of the antique building wing corner concrete roof of the present invention.

[0026] Figure 2 The utility model is a schematic elevation diagram of a wing angle concrete roof of an antique building of the present invention.

[0027] Figure 3 The utility model is a cross-sectional schematic diagram of the wing corner concrete roof of an antique building of the present invention.

[0028] Explanation of the reference numerals in the accompanying drawings in the specification: 1. Concrete eaves beam; 2. Concrete step beam; 3. Concrete corner beam; 4. Wooden box formwork; 5. Wooden fasteners; 6. Concrete rafters; 7. Cinders; 8. Cast-in-place concrete roof. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0030] Reference Figures 1 to 3 As shown, a cast-in-place construction method for an antique building wing corner concrete roof of the present invention comprises the following steps:

[0031] S1: Build scaffolding, cast in-situ concrete eaves beam 1, concrete step beam 2 and concrete corner beam 3; connect the concrete corner beam 3 with the concrete eaves beam 1 and concrete step beam 2 respectively, and the concrete corner beam 3 is inclined to the horizontal plane to form a roof skeleton;

[0032] S2: Building a wooden box formwork 4 on the construction scaffolding of the roof frame corner roof, so that it wraps the corner roof part;

[0033] S3: Customize the wood fastener 5 according to the warping curve after the wing angle is set out;

[0034] S4: Prefabricate the concrete rafter 6, so that the exposed steel bar head is reserved on the back of the concrete rafter 6, and the concrete rafter 6 is positioned by the wooden fastener 5, so that the concrete rafter 6 forms a three-dimensional hollow curved surface after being positioned;

[0035] S5: Pour the coal slag 7 into the wooden box mold 4 under the positioning guidance of the concrete rafter 6, and fill the empty gaps of the empty curved surface shape with the coal slag 7, and form a wing angle curved surface shape after compacting; the coal slag 7 is a lightweight filling material, which is fragile, has a strong bite force between particles, and is easy to shape. The coal slag 7 can be industrial slag, which can be purchased from power plants, etc.

[0036] S6: Apply a layer of concrete release agent with a thickness of 3-5 mm on the outer surface of the wing angle curved surface, tie the roof steel bars along the shape of the wing angle curved surface, the roof steel bars are radially distributed on the wing angle curved surface, weld the roof steel bars to the exposed steel bar heads reserved on the back of the concrete rafter 6, wait for the concrete release agent to dry naturally for 10-30 minutes, pour concrete to form a cast-in-place concrete roof 8, and smooth it according to the shape of the curved surface to form a wing angle concrete roof;

[0037] S7: After the curing period is over, the wooden box formwork 4 is opened to collect the coal slag 7 and then the formwork is removed, and the coal slag 7 on the lower surface of the wing corner concrete roof is cleaned to complete the construction.

[0038] Specifically, in step S1, the concrete eaves beam 1 and the concrete step beam 2 are both reinforced concrete cast-in-place flat beams, and the concrete corner beam 3 is a reinforced concrete cast-in-place inclined beam.

[0039] Specifically, in step S1 , the concrete cornice beam 1 and the concrete step beam 2 are rectangular, and the concrete step beam 2 is located above the concrete cornice beam 1 .

[0040] Specifically, in step S1, the slope of the concrete angle beam 3 is 1:2.5.

[0041] Specifically, in step S2, the wooden box mold 4 is a wooden box-type mold supported by a scaffold.

[0042] Specifically, in step S3, the wooden fixture 5 is a wooden cushion layer component that is configured according to the warping and lofting of the roof.

[0043] Specifically, in step S4, the prefabricated concrete groin rafter 6 is a groin rafter component prefabricated with reinforced concrete.

[0044] Specifically, in step S4, a clamping groove is provided on the surface of the wooden fixture 5, and the concrete mesh rafter 6 is clamped to the wooden fixture 5 through the clamping groove.

[0045] Specifically, in step S6, the concrete release agent comprises the following raw materials in parts by weight: 5-50 parts of rosin, 1-10 parts of engine oil, 50-150 parts of water, 0.1-5 parts of sodium carbonate, and 0.1-5 parts of methyl cellulose or carboxymethyl cellulose. The methyl cellulose in the raw materials can be replaced by carboxymethyl cellulose. Rosin and engine oil are saponified with sodium carbonate, and methyl cellulose is used as a stabilizer and thickener to generate an emulsion that is not easy to precipitate, is viscous, and is easy to size.

[0046] Concrete release agent can be used in concrete during civil construction to prevent concrete components from sticking to the formwork when demoulding. When used, apply it directly on the formwork. After natural drying for 10-30 minutes, it will become a translucent hard film, and then the concrete components can be poured. After demoulding, rinse the surface of the component with tap water, clean it with a broom or mop, and then proceed to the subsequent work.

[0047] Specifically, in step S6, concrete with a thickness of 10-15 cm is poured to form a cast-in-place concrete roof 8, and the concrete strength is C30.

[0048] The method for cast-in-place construction of the wing corner concrete roof of an antique building of the present invention has a simple structure, uses low-priced coal slag 7, has a high recycling rate, is convenient to construct and has low cost. The present invention solves the problems of great difficulty in supporting the double-curved formwork of the wing corner roof of an antique building and low mold recycling rate; at the same time, the construction steps are simple and easy to operate, which greatly saves the production cost of the wing corner concrete roof.

[0049] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A cast-in-place construction method for the wing corner concrete roof of an antique building. It is characterized in that The steps include: S1: Build a scaffolding support, cast in situ concrete eaves beams (1), concrete step beams (2) and concrete corner beams (3), connect the concrete corner beams (3) with the concrete eaves beams (1) and the concrete step beams (2), respectively, and the concrete corner beams (3) are inclined to a horizontal plane to form a roof skeleton; S2: Building a wooden box form (4) on the construction scaffolding of the roof frame corner roof, so that it covers the corner roof part; S3: Customize the wood fastener (5) according to the warping curve after the wing angle is set out; S4: manufacturing a prefabricated concrete rafter (6), so that the back of the prefabricated concrete rafter (6) reserves exposed steel bar heads, and positioning the prefabricated concrete rafter (6) through wooden fasteners (5), so that the prefabricated concrete rafter (6) forms a three-dimensional hollow curved surface shape after being positioned; S5: pouring the coal slag (7) into the wooden box mold (4) under the positioning guidance of the prefabricated concrete rafter (6), and filling the gaps of the hollow curved surface shape with the coal slag (7), and forming a wing angle curved surface shape after compaction; S6: Apply a layer of concrete release agent with a thickness of 3-5 mm on the outer surface of the wing angle curved surface, tie the roof steel bars along the shape of the wing angle curved surface, the roof steel bars are radially distributed on the wing angle curved surface, weld the roof steel bars to the exposed steel bar heads reserved on the back of the prefabricated concrete rafter (6), wait for the concrete release agent to dry naturally for 10-30 minutes, pour concrete to form a cast-in-place concrete roof (8), and smooth it according to the shape of the curved surface to form a wing angle concrete roof; S7: After the curing period is over, the wooden box formwork (4) is opened to collect the coal slag (7), and then the formwork is removed, and the coal slag (7) on the lower surface of the wing corner concrete roof is cleaned to complete the construction; In step S2, the wooden box mold (4) is a wooden box mold supported by a scaffold; In step S3, the wooden fixture (5) is a wooden cushion component for the roof according to the warping and lofting of the roof; In step S4, the prefabricated concrete groin rafter (6) is a prefabricated reinforced concrete groin rafter component.

2. A cast-in-place construction method for antique building wing corner concrete roof according to claim 1, It is characterized in that In step S1, the concrete eaves beam (1) and the concrete step beam (2) are both reinforced concrete cast-in-place flat beams, and the concrete corner beam (3) is a reinforced concrete cast-in-place inclined beam.

3. A cast-in-place construction method for antique building wing corner concrete roof according to claim 1, It is characterized in that In step S1, the concrete cornice beam (1) and the concrete step beam (2) are rectangular, and the concrete step beam (2) is located above the concrete cornice beam (1).

4. A cast-in-place construction method for antique building wing corner concrete roof according to claim 1, It is characterized in that In step S1, the slope of the concrete corner beam (3) is 1:2.

5.

5. The method for casting concrete roof at corner of antique building according to claim 1, It is characterized in that In step S4, a clamping groove is provided on the surface of the wooden fixture (5), and the prefabricated concrete rafter (6) is clamped to the wooden fixture (5) through the clamping groove.

6. A cast-in-place construction method for antique building wing corner concrete roof according to claim 1, It is characterized in that In step S6, the concrete release agent comprises the following raw materials in parts by weight: 5-50 parts of rosin, 1-10 parts of engine oil, 50-150 parts of water, 0.1-5 parts of sodium carbonate, and 0.1-5 parts of methyl cellulose or carboxymethyl cellulose.

7. A cast-in-place construction method for antique building wing corner concrete roof according to claim 1, It is characterized in that In step S6, concrete with a thickness of 10-15 cm is poured to form a cast-in-place concrete roof (8), and the concrete strength is C30.

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