Reinforced concrete cylinder with permanent steel mold

Abstract

The utility model relates to the field of building construction, and discloses a reinforced concrete cylinder with a permanent steel mould, the cylinder comprises a reinforced concrete cylinder body, a steel round mould and studs, the reinforced concrete cylinder body is poured in the steel round mould, the inner wall of the steel round mould is provided with a plurality of studs which are connected with the reinforced concrete cylinder body; the steel round die is formed by sequentially splicing a first die plate and a plurality of second die plates, and the first die plate is located at the top of the steel round die. According to the utility model, the permanent steel mold is used as a protective shell of the reinforced concrete cylinder, so that the dependence on a traditional template is reduced, the steel mold has higher strength and rigidity, and the prefabrication, assembly and construction efficiency is improved; the forming quality of the permanent steel die is good, the shape and size precision of a column can be guaranteed, defects on the surface of concrete are reduced, meanwhile, the sealing performance of the steel die is good, concrete slurry leakage can be effectively prevented, and the quality of the concrete is improved. And the steel round die is spliced by blocks, so that the construction is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a reinforced concrete column with a permanent steel form. BACKGROUND

[0002] In traditional building structures, columns are a common load-bearing component for foyers, lobbies and high spaces, and may also be used in buildings pursuing artistic space, such as inclined columns and tree-shaped columns. At present, columns are mostly made of reinforced concrete. However, concrete columns have very high requirements for formwork. Traditional column formwork is composed of multiple arc-shaped plates, and the formwork needs to have sufficient strength and rigidity to ensure the accuracy of the shape and size of the concrete during pouring. This not only increases the manufacturing cost of the formwork, but also puts higher technical requirements on the installation and disassembly of the formwork, prolonging the construction period. Traditional wood, steel and glass steel column formwork is commonly used for pouring columns. However, these existing formworks have some significant shortcomings.

[0003] Traditional steel column formwork and glass steel column formwork need to use tower cranes for hoisting and installation, and require a large number of accessories such as frame rods, fasteners and reinforcing parts, and the installation procedure is complex. Steel column formwork and glass steel column formwork are not flexible to assemble, cannot be arbitrarily nailed, sawed or drilled, the formwork shape is fixed, the assembly form is single, and the height adjustability is poor. The surface finish of the columns poured by steel column formwork and glass steel column formwork is poor, the visual quality is poor, and the actual measured quality is generally poor.

[0004] Although wood column formwork is flexible and can be assembled into columns, elliptical columns or other irregular column bodies, the formwork height can be adjusted, but the rigidity is poor, the manual installation process requires higher requirements, the formwork is large in loss and cannot be effectively recycled. The wood column formwork joint is obvious, the size is not standard, and the phenomenon of slurry running and leakage is prone to occur.

[0005] In addition, steel pipe concrete columns can also be used as load-bearing components, but the design and construction of the steel pipe concrete column joint are relatively complex, such as setting up steel corbels, ring beams, load-bearing pins, beam haunches, etc., which need to ensure that the load-bearing steel bars of the beam are effectively connected and welded with the steel column, not only the stress condition is complex, but also the construction difficulty and cost are increased. In addition, the welding quality of the steel pipe, the pouring quality and density of the concrete are difficult to guarantee during construction. SUMMARY

[0006] The utility model aims at providing a reinforced concrete column with a permanent steel formwork, which has the advantages of simple structure, easy construction, low cost, high bearing capacity and good stability.

[0007] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0008] The utility model provides a reinforced concrete column with permanent steel mould, including reinforced concrete column body, steel round mould, bolt, the reinforced concrete column body is casted in the inside of steel round mould, and the inner wall of steel round mould is provided with a plurality of bolts and is connected with reinforced concrete column body.

[0009] Further, the steel round mould is sequentially spliced by a first mould plate and a plurality of second mould plates, and the first mould plate is located at the top of the steel round mould.

[0010] Further, the first mould plate is provided with a reserved interface matching the reinforced concrete beam at the top thereof, and a ring of bolts is arranged at an end of the inner wall of the first mould plate away from the reserved interface.

[0011] Further, a ring of bolts is arranged at each end of the inner wall of the second mould plate.

[0012] Further, each ring of bolts is arranged with 4-10 bolts.

[0013] Further, the length of the bolts is 2mm-5mm less than the thickness of the protective layer of the reinforced concrete column body, and is generally 25mm-35mm.

[0014] Further, the length of the second mould plate is 800mm-1500mm, and is preferably 1000mm-1200mm.

[0015] Further, the distance between the ring of bolts and the nearest end of the second mould plate is 25mm-50mm.

[0016] Further, the steel round mould is made of one of ordinary carbon steel Q235, low-alloy high-strength steel Q355 or Q390.

[0017] Further, the wall thickness of the steel round mould is 6mm-22mm, and is preferably 10mm-16mm.

[0018] Further, the diameter of the reinforced concrete column body is 600mm-1500mm.

[0019] Further, the bottom of the reinforced concrete column body is further provided with a shear key connected with a building bottom plate or a pile cap.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] The permanent steel mold is used as the protective shell of the reinforced concrete column, the dependence on the traditional mold is reduced, the steel mold has high strength and rigidity, is prefabricated and assembled, and the construction efficiency is improved; the forming quality of the permanent steel mold is good, the shape and size precision of the column can be ensured, the defects on the surface of the concrete are reduced, meanwhile, the steel mold has good sealing performance, the concrete leakage can be effectively prevented, and the quality of the concrete is improved; the design and construction are relatively simple, the steel round mold is assembled in blocks, can be used as the column mold, and can also bear stress, and the bearing capacity and stability of the column are improved; the shear keys are arranged at the bottom of the column to increase the shear strength, the reserved interfaces are arranged at the top of the steel round mold, the concrete beam and the column are connected conveniently, the arrangement of the steel reinforcement framework and the pouring of the concrete are more convenient, and the construction difficulty and the complexity of the joint treatment are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of a second mold.

[0023] Figure 2 is a schematic view of a first mold.

[0024] Figure 3 is a schematic view of a cross section of a reinforced concrete column.

[0025] In the drawing: 1 - first mold; 2 - second mold; 3 - stud; 4 - bottom plate or bearing platform; 5 - shear key; 6 - reserved interface; 7 - reinforced concrete column body. DETAILED DESCRIPTION

[0026] In order for those skilled in the art to better understand the present application, the technical scheme of the present application is further described below in combination with the drawings.

[0027] The present application provides a reinforced concrete column with a permanent steel mold, which comprises a reinforced concrete column body 7, a steel round mold and studs 3, the reinforced concrete column body 7 is poured in the steel round mold, and the inner wall of the steel round mold is provided with a plurality of studs 3 connected with the reinforced concrete column body 7.

[0028] The steel round mold is sequentially assembled by a first mold 1 and a plurality of second molds 2, wherein the first mold 1 is located at the top of the steel round mold. The top of the first mold 1 is provided with a reserved interface 6 matched with a reinforced concrete beam. The length of the second mold 2 is 800mm-1500mm, preferably 1000mm-1200mm. A circle of studs 3 is arranged at each end of the inner wall of the first mold 1, and a circle of studs 3 is arranged at the end of the inner wall of the first mold 1 away from the reserved interface 6, and the distance between each circle of studs 3 and the corresponding end is 25mm-50mm, and 4-10 studs 3 are arranged in each circle of studs 3. The length of the stud 3 is 2mm-5mm less than the thickness of the protective layer of the reinforced concrete column body 7, and is generally 25mm-35mm.

[0029] The steel round mold is made of one of ordinary carbon steel Q235, low alloy high strength steel Q355 or Q390. The wall thickness of the steel round mold is 6mm-22mm, preferably 10mm-16mm. The diameter of the reinforced concrete column body is 600mm-1500mm.

[0030] In other embodiments, the reinforced concrete column with a permanent steel mold is integrally arranged on the building bottom plate or pile cap 4, and the bottom of the reinforced concrete column body 7 is further provided with a shear key 5 connected with the building bottom plate or pile cap 4, so as to improve the shear strength between the column and the building bottom plate or pile cap 4. The shear key 5 can be embedded in the building bottom plate or pile cap 4.

[0031] The axial compression strength bearing capacity design value of the reinforced concrete column with a permanent steel mold can be calculated according to formula (1):

[0032] (1)

[0033] In the formula, is the axial compression strength bearing capacity design value of the reinforced concrete column with a permanent steel mold (f );

[0034] is the cross-sectional area of the reinforced concrete column with a permanent steel mold, equal to the sum of the cross-sectional areas of the permanent steel mold and the reinforced concrete column body (A );

[0035] is the compression strength design value of the reinforced concrete column with a permanent steel mold (f );

[0036] Among them, , ;

[0037] For the reinforced concrete column with a permanent steel mold, ;

[0038] , , are the areas of the steel mold, steel reinforcement and concrete part respectively (A );

[0039] is the compression strength design value of the steel mold (f );

[0040] is the compression strength design value of the concrete (f );

[0041] is the steel ratio of the reinforced concrete column with a permanent steel mold; ​​

[0042] The coefficient of the influence of the cross-sectional shape on the sleeve effect;

[0043] , ;

[0044] The design value of the shear bearing capacity of the reinforced concrete cylinder with the permanent steel form can be calculated according to formula (2) and (3):

[0045] (2)

[0046] (3)

[0047] In the formula, is the design value of the shear bearing capacity of the reinforced concrete cylinder with the permanent steel form (f );

[0048] is the design value of the shear strength of the reinforced concrete cylinder with the permanent steel form (f );

[0049] The main difference between the reinforced concrete cylinder with the permanent steel form and the ordinary reinforced concrete cylinder is that the permanent steel form is arranged outside the reinforced concrete cylinder body, and the permanent steel form is used as a supporting structure during pouring of the reinforced concrete cylinder body and also as a collaborative force component of the reinforced concrete cylinder body. For the reinforced concrete cylinder with the permanent steel form, That is, when calculating the steel ratio of the cylinder, the sum of the steel area and the area of the round steel form is used to replace the steel area. Therefore, under the same conditions, the shear bearing capacity of the reinforced concrete cylinder with the permanent steel form is 1.45-2.5 times that of the ordinary reinforced concrete cylinder, and the shear bearing capacity of the cylinder can be greatly improved.

[0050] The construction process of the reinforced concrete cylinder with the permanent steel form is as follows:

[0051] 1) Install the shear key at the designed position on the building bottom plate or bearing platform, bind the steel cage, and weld a circle of pegs at the two ends of the inner wall of the second formwork.

[0052] ​2) Place the first second formwork at the design position, the shear key is located at the center of the second formwork, then hoist the reinforcement cage into the first second formwork, and pour the concrete to be 50mm-80mm lower than the upper port of the first second formwork;

[0053] 3) The second second formwork is sleeved on the reinforcement cage, the second second formwork is welded with the first second formwork, and the concrete is poured to be 50mm-80mm lower than the upper port of the second second formwork;

[0054] 4) Repeat step 3), until the concrete in the last second formwork is completed pouring, then the first formwork is sleeved on the reinforcement cage, welded with the last second formwork, and the concrete is poured to the bottom of the reserved interface arranged on the first formwork;

[0055] 5) The reinforcement connected with the ring beam is bound at the reserved interface of the first formwork, the concrete in the first formwork is poured together with the upper ring beam concrete to form an integral whole, and the construction of the reinforced concrete column with a permanent formwork is completed.

[0056] The reinforced concrete column with a permanent steel form adopts the permanent steel form as a protective shell of the reinforced concrete column, reduces the dependence on traditional formworks, the steel form has high strength and rigidity, is prefabricated and assembled, and construction efficiency is improved. The permanent steel form has good forming quality, can guarantee the shape and size precision of the column, reduces defects on the surface of the concrete, meanwhile, the steel form has good sealing performance, can effectively prevent concrete leakage, and improves the quality of the concrete. The permanent steel form reinforced concrete column is relatively simple in design and construction, the steel form is assembled in blocks, can not only serve as a column formwork, but also can bear stress, improves the bearing capacity and stability of the column. The shear strength is increased by the shear key arranged at the bottom of the column, and the steel form at the top of the column is provided with a reserved interface, so that the concrete beam can be connected with the column. The arrangement of the reinforcement cage and the pouring of the concrete are also more convenient, and the construction difficulty and the complexity of node processing are reduced. The reinforced concrete column with a permanent steel form has obvious advantages in cost, quality and construction efficiency, and can better meet the demand of building structure.

[0057] The above description is only used to illustrate the technical scheme of the utility model and not to limit it, and the modification or replacement of the technical scheme by other technical personnel in the field should be covered in the scope of the claims of the utility model, as long as the connotation of the technical scheme of the utility model is not deviated.

Claims

1. A reinforced concrete column with permanent formwork, characterised in that: The steel reinforced concrete column is cast inside the steel round mould, and the inner wall of the steel round mould is provided with a plurality of studs connected with the steel reinforced concrete column. The steel round mould is formed by sequentially splicing a first mould plate and a plurality of second mould plates, and the first mould plate is located at the top of the steel round mould.

2. The reinforced concrete column with permanent steel form according to claim 1, characterized in that: The first mould plate is provided with a reserved interface matching the steel reinforced concrete beam at the top thereof, and a circle of studs is arranged at the end of the inner wall of the first mould plate away from the reserved interface.

3. The reinforced concrete column with permanent steel form according to claim 1, characterized in that: A circle of studs is arranged at each end of the inner wall of the second mould plate.

4. Reinforced concrete column with permanent steel form according to claim 2 or 3, characterized in that: Each circle of studs is arranged with 4-10 studs.

5. Reinforced concrete column with permanent steel form according to claim 2 or 3, characterized in that: The length of the studs is 2mm-5mm less than the thickness of the protective layer of the steel reinforced concrete column.

6. The reinforced concrete column with permanent steel form according to claim 3, characterized in that: The length of the second mould plate is 800mm-1500mm.

7. The reinforced concrete column with permanent steel form according to claim 3, characterized in that: The distance between the circle of studs and the nearest end of the second mould plate is 25mm-50mm.

8. Reinforced concrete column with permanent steel form according to any of claims 1-3, characterized in that: The steel round mould is made of one of ordinary carbon steel Q235, low-alloy high-strength steel Q355 or Q390.

9. Reinforced concrete column with permanent formwork according to any of claims 1-3, characterized in that: The wall thickness of the steel round mould is 6mm-22mm.

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