Construction method of ramp arc-shaped concrete structure formwork

Abstract

The invention discloses a construction method for a slope arc-shaped concrete structure formwork. The construction method comprises the following steps that S1, positioning and paying-off are conducted; s2, manufacturing a template, namely bending the template according to the design of the construction drawing; s3, secondary keels are manufactured, equidistant cutting lines are drawn on the battens, and the battens are incompletely cut according to the cutting lines; bending the batten into a corresponding radian, then manufacturing a plurality of wooden wedges according to the size and the number of the notches in the upper part of the batten at the moment, smearing adhesives on the two sides of the wooden wedges, then inserting the wooden wedges into the notches of the batten, and completing the manufacturing of the secondary keel after the wooden wedges are firmly adhered; s4, formwork erecting is conducted, specifically, formwork erecting is conducted according to a drawing, the main keels are vertically arranged, and the auxiliary keels are horizontally arranged; s5, concrete pouring; and S6, formwork removal and maintenance are conducted. Compared with the prior art, the problems that an arc-shaped concrete structure formwork is difficult to construct and the quality is not easy to control can be effectively solved, safety and reliability during formwork erecting are guaranteed, and the flatness and the impression effect of a wall surface after concrete pouring can also be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a ramp arc-shaped concrete structure template construction method. Background Art

[0002] With the development of cities, underground space is being used more and more. Vehicles enter and exit underground by building car ramps. However, in order to save space and ensure smooth entry and exit of vehicles, the ramps are mostly designed in an arc or spiral shape. This results in the side walls of the underground car ramp structure being different from traditional plate walls, and the construction difficulty is greatly increased.

[0003] At present, the common construction methods are mainly to customize steel formwork, use plastic formwork or cut wooden formwork into small strips to piece together the structural arc. However, the above methods all have certain defects. For example, customized steel formwork cannot be reused due to the different curvature angles of the ramp, which is costly; plastic formwork is easy to deform, and the flatness is poor after construction; wooden formwork has many cutting seams, poor visual quality, and the formwork cannot be turned around, resulting in large material loss. In addition, due to the curvature of the structure, steel pipes cannot be used as the main horizontal keel when supporting the wall formwork. In actual construction, steel bars are often used instead, but the strength is reduced, which is prone to mold expansion and steel bar waste. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a ramp curved concrete structure formwork construction method, which changes the common wall formwork primary and secondary keel support method, and performs special treatment on the wooden formwork and wooden keel in combination with the actual situation on site to adapt to the curved concrete structure, thereby improving the construction quality and visual effect. Construction according to the method of the present invention can improve construction quality, reduce later problem handling, and reduce construction costs.

[0005] To achieve this technical purpose, the present invention adopts the following scheme: A ramp arc-shaped concrete structure formwork construction method comprises the following steps: S1. Positioning and laying out, positioning and laying out according to the drawing dimensions; S2. Formwork production: calculate the amount of materials required for the construction of the curved concrete structure according to the construction drawings, lay out the curved concrete structure, calculate the curvature and size of each formwork, and then bend the formwork; S3, making the secondary keel, draw equidistant cutting lines on the wood, and then make incomplete cuts on the wood according to the cutting lines; bend the wood into a corresponding arc according to the template after bending and forming, and then make a number of wooden wedges according to the size and number of the notches on the upper part of the wood at this time, apply adhesive on both sides of the wooden wedges and insert them into the notches of the wood, wait for them to be firmly bonded, and the secondary keel is completed; S4. Formwork support: Formwork support should be carried out according to the drawings, with the main keel arranged vertically and the secondary keel arranged horizontally; S5. Concrete pouring: pour and vibrate concrete according to design requirements; S6. De-moulding and curing: After the concrete is poured, it should be kept moisturized and cured, and the moulding should be removed after the requirements are met.

[0006] Compared with the prior art, the present invention has the following beneficial effects: The present invention can effectively solve the problems of difficult construction and difficult quality control of arc concrete structure formwork, not only ensuring the safety and reliability of the formwork support, but also ensuring the flatness and visual effect of the wall after concrete pouring. The present invention is based on the actual construction conditions on site and combines the characteristics of the materials themselves to ensure the construction quality to the greatest extent and reduce the construction cost. The present invention can be produced on site according to the different curvature requirements of the construction site, and is simple, convenient and highly adaptable.

[0007] Furthermore, the specific operation of the template bending production is: use steam fumigation or hot water boiling to soften the wooden template, and then bend the wooden template according to the bending curvature of each template during typesetting. After bending and checking, fix the wooden template firmly and place it in a cool and ventilated place to allow excess moisture to disperse and restore its own strength and hardness.

[0008] Furthermore, the specific operation of the formwork support is: install the wooden formwork on the outside of the tied steel wall according to the design requirements of the drawings, then install the secondary keel on the outside of the wooden formwork and pass the tension bolts, the secondary keel is set horizontally, and then install the main keel, the main keel is set vertically, and finally tighten the tension bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of wood cutting according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a wooden block after bending according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a wooden wedge filled with wood according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the support of the arc-shaped concrete structure formwork according to an embodiment of the present invention; The markings in the figure are: 1. Wooden formwork; 2. Curved concrete structure; 3. Secondary purlin; 31. Uncut wooden planks; 32. Cutting line; 33. Notch after bending; 34. Wooden wedge; 4. Tension bolts; 5. Main purlin; 6. Reinforcement nuts. DETAILED DESCRIPTION

[0010] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0011] See also Figures 1 to 4 The present invention provides a ramp arc-shaped concrete structure formwork construction method, comprising the following steps: S1. Positioning and laying out: Positioning and laying out according to the drawing dimensions.

[0012] S2. Formwork production. According to the construction drawings, the amount of materials required for the construction of the curved concrete structure 2 is calculated, including the formwork, the main keel 5, the secondary keel 3, and the tension bolts 4. In this embodiment, the formwork adopts a wooden formwork 1, the main keel 5 adopts a double steel pipe, and the secondary keel 3 is a wooden square. The curved concrete structure 2 is laid out, and the curvature, size and other information of each wooden formwork 1 are calculated. Then, the wooden formwork 1 is softened by steam fumigation or hot water boiling, and then the wooden formwork 1 is bent according to the bending curvature of each wooden formwork 1 during layout. After bending and checking, the wooden formwork 1 is firmly fixed and placed in a cool and ventilated place to allow its excess water to disperse and restore its own strength and hardness.

[0013] S3, making the secondary keel 3, drawing equidistant cutting lines 32 on the wood, and then cutting the wood along the cutting lines 32, the lower part of the wood is not completely cut off during cutting, and part of the thickness is retained without cutting, which is recorded as the uncut wood 31; after the cutting, the wood has a certain extension and bending ability due to the presence of multiple notches, and the wood is bent into a corresponding arc according to the wood template 1 after bending in step S2, and then a number of wooden wedges 34 are made according to the size and number of the notches 33 after bending on the upper part of the wood at this time, and adhesive is applied to both sides of the wooden wedges 34 and then inserted into the notches 33 after bending. After it is firmly bonded, the secondary keel 3 is completed, and the secondary keel 3 is tightly fitted to the wood template 1 after bending, and all the required secondary keels 3 are completed in the same way.

[0014] S4. Formwork support: Formwork support is carried out according to the drawings. The traditional method of vertical arrangement of secondary purlins 3 and horizontal arrangement of main purlins 5 is abandoned. The present application interchanges them and changes the secondary purlins 3 to horizontal arrangement and the main purlins 5 to vertical arrangement, so as to solve the problem that the curved wall steel pipes cannot bend along the curvature.

[0015] The specific steps are: install the wooden formwork 1 on the outside of the tied side wall reinforcement according to the design requirements of the drawings, then install the secondary keel 3 on the outside of the wooden formwork 1 and penetrate the tension bolts 4, the secondary keel 3 is set horizontally, and the secondary keel 3 is the wooden square bent in step S3; then install the main keel 5, the main keel 5 is set vertically, and the main keel 5 is a double steel pipe; finally, tighten the tension bolts 4, and install the reinforcement nuts 6 and gaskets at both ends of the tension bolts 4. The laying of the wooden formwork 1 and the installation of the keel during the formwork support process are all existing technologies and will not be elaborated here. In actual construction, formwork reinforcement measures can also be taken as needed. The stability and accuracy of each step need to be checked to ensure the overall safety and reliability of the formwork system.

[0016] S5. Concrete pouring: prepare, pour and vibrate concrete according to design requirements.

[0017] S6. De-moulding and curing: After the concrete is poured, it should be kept moisturized and cured, and the moulding should be removed after the requirements are met.

[0018] The present invention can effectively solve the problems of difficult construction and difficult quality control of arc concrete structure formwork, not only ensuring the safety and reliability of the formwork support, but also ensuring the flatness and visual effect of the wall after concrete pouring. The present invention is based on the actual construction conditions on site and combines the characteristics of the materials themselves to ensure the construction quality to the greatest extent and reduce the construction cost. The present invention can be produced on site according to the different curvature requirements of the construction site, and is simple, convenient and highly adaptable.

[0019] Finally, it should be noted that the above-listed embodiments are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A ramp arc concrete structure formwork construction method, characterized in that: The following steps are involved: S1. Positioning and laying out, positioning and laying out according to the drawing dimensions; S2. Formwork production: calculate the amount of materials required for the construction of the curved concrete structure according to the construction drawings, lay out the curved concrete structure, calculate the curvature and size of each formwork, and then bend the formwork; S3, making the secondary keel, draw equidistant cutting lines on the wood, and then make incomplete cuts on the wood according to the cutting lines; bend the wood into a corresponding arc according to the template after bending and forming, and then make a number of wooden wedges according to the size and number of the notches on the upper part of the wood at this time, apply adhesive on both sides of the wooden wedges and insert them into the notches of the wood, wait for them to be firmly bonded, and the secondary keel is completed; S4. Formwork support: Formwork support should be carried out according to the drawings, with the main keel arranged vertically and the secondary keel arranged horizontally; S5. Concrete pouring: pour and vibrate concrete according to design requirements; S6. De-moulding and curing: After the concrete is poured, it should be kept moisturized and cured, and the moulding should be removed after the requirements are met.

2. The ramp arc concrete structure formwork construction method according to claim 1 is characterized in that: The specific operation of template bending is: use steam fumigation or hot water boiling to soften the wooden template, and then bend the wooden template according to the bending curvature of each template during typesetting. After bending and checking, fix the wooden template firmly and place it in a cool and ventilated place to allow excess moisture to disperse and restore its own strength and hardness.

3. The ramp arc concrete structure formwork construction method according to claim 1 is characterized in that: The specific operation of formwork support is: install the wooden formwork on the outside of the steel wall after the binding according to the design requirements of the drawings, then install the secondary keel on the outside of the wooden formwork and pass the tension bolts, the secondary keel is set horizontally, and then install the main keel, the main keel is set vertically, and finally tighten the tension bolts.

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