A method for using a simple protective layer thickness control tool

Abstract

A method for using a protective layer thickness control tool that is easy to operate; comprising: a first positioning steel bar, the inner surface of which is provided with a docking groove at the top; and a second positioning steel bar connected to the inside of the first positioning steel bar. The protective layer thickness control tool that is easy to operate is to insert the top of the second positioning steel bar into the docking groove provided inside the first positioning steel bar, then weld the connection between the first positioning steel bar and the second positioning steel bar, finally clamp the first clamp and the second clamp into the inside of the first limiting groove and the second limiting groove respectively, and clamp the two end legs of the first clamp and the second clamp into the inside of the first clamp and the second clamp respectively, finally weld the connection between the clamp and the steel bar, so that the tool is assembled, and the tool is driven into the surface layer of the soil body until the second clamp, and then the concrete is sprayed in layers to the first clamp and the "U"-shaped top of the first positioning steel bar, so as to achieve the purpose of controlling the thickness of the concrete spraying.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a method for using a protective layer thickness control tool that is easy to operate. Background Art

[0002] During the construction of reinforced concrete, the thickness of the steel bar protective layer is an important indicator of the quality of reinforced concrete engineering construction. The thickness of the reinforced concrete protective layer is related to the bearing capacity, durability, fire resistance and other properties of the structure. Therefore, it is clearly stipulated that the thickness of the steel bar protective layer must be inspected during the structural entity inspection, and specific regulations are made on the number of random inspections and inspection methods, thereby putting forward higher requirements for ensuring the thickness of the steel bar protective layer from the standard.

[0003] The traditional process uses mortar pads made on site to ensure the thickness of the steel bar protection layer, but in practice, the effect is not ideal. The production of mortar pads is greatly affected by the season, and the thickness is uneven, the error is large, the strength is low, it is difficult to fix, and it is easy to break and fall off. Therefore, the position of the steel bars is inaccurate or offset, especially the positioning of the negative bending moment steel bars is particularly difficult. Due to the inaccurate position of the steel bars, the concrete structure has defects such as exposed steel bars and cracks, which seriously affects the quality of the concrete structure. Therefore, it is necessary to improve the above problems to meet market demand. Summary of the invention

[0004] The purpose of the present invention is to provide a protective layer thickness control tool that is easy to operate to solve the problem that the traditional process proposed in the above background technology is to use mortar pads made on site to ensure the thickness of the steel bar protective layer, and the production of mortar pads is greatly affected by the seasons, and the thickness is uneven, the error is large, the strength is low, it is difficult to fix, and it is easy to break and fall off.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A simple-to-operate protective layer thickness control tool comprises a first positioning steel bar 1 and a second positioning steel bar 3; wherein:

[0007] A butt joint groove 2 is formed on the inner surface of the top end of the first positioning steel bar 1; a first clamping groove 4 and a second clamping groove 5 are formed on the left and right sides of the first positioning steel bar 1 respectively;

[0008] The second positioning steel bar 3 is connected to the inside of the top end butt joint 2 of the first positioning steel bar 1; the left and right sides of the second positioning steel bar 3 are respectively provided with a first limiting groove 6 and a second limiting groove 7;

[0009] The first clamping hoop 8 is connected to the inside of the first clamping groove 4 and the first limiting groove 6, and the second clamping hoop 9 is connected to the inside of the second clamping groove 5 and the second limiting groove 7. The first clamping hoop 8 and the second clamping hoop 9 are both in a "U" shape.

[0010] When the protective layer thickness control tool is used for slope protection: the steel bar protective layer control tool is arranged on the soil surface layer with a plum blossom arrangement spacing of 1.5m; the embedded soil fixed position is driven into the soil until the second positioning point B; after the component is positioned, the steel bars are tied, the steel bars are passed through the component, and the horizontal and vertical steel bars are fixed at the first positioning point A with wires; thus, a fixed distance of 50mm is formed between the steel bars and the soil, and a fixed position of 50mm is also formed between the steel bars and the surface layer; then spraying concrete is carried out, and the thickness of the sprayed concrete reaches the surface layer position, which meets the requirements;

[0011] The process flow of the protective layer thickness control tool in slope protection: measurement and positioning (1.5m spacing plum blossom arrangement) → fix tool position → anti-collision → tie steel mesh → review → spray concrete → inspection;

[0012] When the protective layer thickness control tool is used in cast-in-place concrete slabs: the steel bar protective layer control tool is arranged on the formwork with a plum blossom arrangement spacing of 1.0m for positioning; the steel bars are tied, the bottom bars are passed through the components and tied at the second positioning point B, and the surface bars are passed through the components and tied at the first positioning point A; thus, a fixed distance is formed between the bottom bars and the formwork, and a fixed distance is also formed between the surface bars and the surface layer; then concrete is poured, and the requirements are met when the surface layer position is reached;

[0013] The process flow of using the protective layer thickness control tool in cast-in-place concrete slabs: measurement and positioning (1.0m spacing in plum blossom arrangement) → tying bottom reinforcement → fixing tool position → review → tying surface reinforcement → pouring concrete → inspection.

[0014] Optimized: The first clamping groove 4 and the first limiting groove 6 are symmetrically distributed about the longitudinal midline of the first positioning steel bar 1, and the distance from the first clamping groove 4 to the top of the first positioning steel bar 1 is the same as the distance from the first limiting groove 6 to the top of the first positioning steel bar 1.

[0015] Optimized: The second clamping groove 5 and the second limiting groove 7 are symmetrically distributed about the longitudinal midline of the first positioning steel bar 1, and the distance from the second clamping groove 5 to the top of the first positioning steel bar 1 is the same as the distance from the second limiting groove 7 to the top of the first positioning steel bar 1.

[0016] Optimized: welding connection between the first positioning steel bar 1 and the second positioning steel bar 3.

[0017] Optimization: The first clamp 8 is respectively connected to the first clamping groove 4 and the first limiting groove 6 by welding.

[0018] Optimization: The second clamp 9 is respectively connected to the second clamping groove 5 and the second limiting groove 7 by welding.

[0019] Optimized: The size of the butt joint groove 2 matches the outer wall profile of the second positioning steel bar 3.

[0020] Optimized: the first clamping groove 4 and the first limiting groove 6 match the outer wall profile of the first clamp 8 .

[0021] Optimized: the second clamping groove 5 and the second limiting groove 7 match the outer wall profile of the second clamp 9 .

[0022] Compared with the prior art, the protective layer thickness control tool, which is easy to operate, replaces the traditional mortar pad by assembling and connecting the first positioning steel bar, the second positioning steel bar, the first clamp and the second clamp, so as to achieve the purpose of accurately controlling the thickness of concrete spraying, and the first clamp and the second clamp are provided with the butt joint groove, the first clamp groove, the second clamp groove, the first limiting groove and the second limiting groove on the surface of the first positioning steel bar and the second positioning steel bar, so as to accurately position the first clamp and the second clamp. The beneficial effects of the present invention are:

[0023] Beneficial effects 1. Insert the top of the second positioning steel bar into the docking groove opened inside the first positioning steel bar, and then weld the connection between the first positioning steel bar and the second positioning steel bar, finally, clamp the first clamp and the second clamp into the first limiting groove and the second limiting groove respectively, and clamp the two end feet of the first clamp and the second clamp into the first clamp groove and the second clamp groove respectively, and finally weld the connection between the clamp and the steel bar to complete the assembly of the tool, and drive the tool into the surface layer of the soil until the second clamp, and then spray concrete in layers to the first clamp and the "U"-shaped top of the first positioning steel bar to realize concrete pouring, thereby replacing the traditional mortar pad and achieving the purpose of controlling the thickness of concrete spraying.

[0024] Beneficial effect 2. Through the docking groove, the first clamping groove, the second clamping groove, the first limiting groove and the second limiting groove opened on the surface of the first positioning steel bar and the second positioning steel bar, the first clamp and the second clamp can be accurately welded to the first positioning steel bar and the second positioning steel bar to achieve the purpose of precise positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the first positioning steel bar structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the second positioning steel bar structure of the present invention;

[0028] Figure 4-Figure 7 It is a schematic diagram of the structure of an embodiment of the present invention.

[0029] In the figure: 1. first positioning steel bar; 2. docking groove; 3. second positioning steel bar; 4. first clamping groove; 5. second clamping groove; 6. first limiting groove; 7. second limiting groove; 8. first clamp; 9. second clamp. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] A simple-to-operate protective layer thickness control tool; comprising a first positioning steel bar 1 and a second positioning steel bar 3; wherein,

[0032] A butt joint groove 2 is formed on the inner surface of the top end of the first positioning steel bar 1; a first clamping groove 4 and a second clamping groove 5 are formed on the left and right sides of the first positioning steel bar 1 respectively;

[0033] The second positioning steel bar 3 is connected to the inside of the top end butt joint 2 of the first positioning steel bar 1; the left and right sides of the second positioning steel bar 3 are respectively provided with a first limiting groove 6 and a second limiting groove 7;

[0034] The first clamping hoop 8 is connected to the inside of the first clamping groove 4 and the first limiting groove 6, and the second clamping hoop 9 is connected to the inside of the second clamping groove 5 and the second limiting groove 7. The first clamping hoop 8 and the second clamping hoop 9 are both in a "U" shape.

[0035] The first clamping groove 4 and the first limiting groove 6 are symmetrically distributed about the longitudinal midline of the first positioning steel bar 1, and the distance from the first clamping groove 4 to the top of the first positioning steel bar 1 is the same as the distance from the first limiting groove 6 to the top of the first positioning steel bar 1.

[0036] The second clamping groove 5 and the second limiting groove 7 are symmetrically distributed about the longitudinal midline of the first positioning steel bar 1, and the distance from the second clamping groove 5 to the top of the first positioning steel bar 1 is the same as the distance from the second limiting groove 7 to the top of the first positioning steel bar 1.

[0037] The first positioning steel bar 1 and the second positioning steel bar 3 are welded together. The first clamp 8 is welded together with the first clamping groove 4 and the first limiting groove 6. The second clamp 9 is welded together with the second clamping groove 5 and the second limiting groove 7.

[0038] The size of the docking groove 2 matches the outer wall profile of the second positioning steel bar 3. The first clamping groove 4 and the first limiting groove 6 match the outer wall profile of the first clamp 8, and the second clamping groove 5 and the second limiting groove 7 match the outer wall profile of the second clamp 9, so as to facilitate accurate docking between the first positioning steel bar 1 and the second positioning steel bar 3.

[0039] After the first positioning steel bar 1 and the second positioning steel bar 3 are connected, the first clamp 8 and the second clamp 9 are respectively inserted into the first limiting groove 6 and the second limiting groove 7, and the two end feet of the first clamp 8 and the second clamp 9 are respectively inserted into the first clamping groove 4 and the second clamping groove 5. Finally, the connection between the first clamp 8 and the second clamp 9 and the first positioning steel bar 1 and the second positioning steel bar 3 is welded, so that the size of the first clamp 8 and the second clamp 9 can effectively control the distance between the two end feet of the first positioning steel bar 1 and the second positioning steel bar 3, so as to achieve accurate positioning of the first positioning steel bar 1 and the second positioning steel bar 3.

[0040] In summary: Figure 1-4 As shown, when using the simple-to-operate protective layer thickness control tool, first, insert the top of the second positioning steel bar 3 into the docking groove 2 opened inside the first positioning steel bar 1, and then weld the connection between the first positioning steel bar 1 and the second positioning steel bar 3, and finally, insert the first clamp 8 and the second clamp 9 into the first limiting groove 6 and the second limiting groove 7 respectively, and make the two end feet of the first clamp 8 and the second clamp 9 respectively clamp into the first clamp groove 4 and the second clamp groove 5, and finally weld the connection between the clamp and the steel bar to complete the assembly of the tool, and drive the tool into the surface layer of the soil until the second clamp 9, and then spray concrete in layers to the first clamp 8 and the "U"-shaped top of the first positioning steel bar 1 to realize concrete pouring. This is the feature of the simple-to-operate protective layer thickness control tool.

[0041] Example 1

[0042] The present invention specifically controls the process of slope protection. First, the position of the steel bar away from the surface layer can be controlled through the first positioning point A, which is the first protection layer control. Secondly, the position of the steel bar away from the soil can be controlled through the second positioning point B, which is the second protection layer control.

[0043] Through the two-way control of the present invention, the following target effects can be achieved:

[0044] 1. Not only the thickness of the protective layer between the steel bar and the soil body is strictly and accurately controlled, but also the thickness of the protective layer between the steel bar and the surface layer is strictly controlled, so as to achieve the purpose of more accurate control of the thickness of the protective layer.

[0045] 2. Since the present invention fixes the position of the surface layer to the soil, the thickness of the shotcrete can also be accurately and effectively controlled. Figure 4 .

[0046] Example 1 Introduction to each node:

[0047] Positioning point A: surface layer. The surface layer of the present invention adopts two arc-shaped steel bars welded vertically, which is mainly to comprehensively consider mechanical properties, aesthetic factors and convenient manufacturing process, easy welding operation, and can reduce the contact area between the steel bar and the surface layer, reducing the probability of exposed steel bars. Its main function is to control the thickness of shotcrete. The concrete thickness meets the requirements when it reaches the surface layer.

[0048] Positioning point B: U-shaped card positioning point. The U-shaped opening is used mainly for comprehensive consideration of convenient operation during steel bar binding and will not affect steel bar binding. Its main function is to fix the steel mesh.

[0049] Positioning point C: Steel bar positioning groove. The steel bar at the U-shaped card positioning point protrudes 1.5d (d = steel bar diameter), forming a slot with the support leg of the fourth positioning point D for steel bar positioning and binding. Its main function is to effectively control the steel bar spacing in the longitudinal and transverse directions according to the size of the U-shaped card, and realize the precise positioning of the steel bar.

[0050] The fourth positioning point D: support leg. The specific length of the four support leg steel bars is determined according to the soil properties. The length range of the present invention is 100mm to 200mm. Its main function is to ensure that the positioning of the present invention is stable and not easy to fall. See attached Figure 5 .

[0051] When used for slope protection: arrange this steel protection layer control tool on the soil surface layer with a plum blossom arrangement spacing of 1.5m. Drive the embedded soil fixed position into the soil until the second positioning point B. After positioning the component, tie the steel bars, pass the steel bars through this component, and fix the horizontal and vertical steel bars at the first positioning point A with wire. As a result, a fixed distance of 50mm is formed between the steel bars and the soil, and a fixed position of 50mm is also formed between the steel bars and the surface layer. Then spray concrete, and the thickness of the spray concrete reaches the surface layer position, which meets the requirements.

[0052] The process flow of the present invention during slope protection is as follows: measurement and positioning (1.5m-spaced plum blossom arrangement) → fixing tool position → anti-collision → tying steel mesh → review → spraying concrete → inspection.

[0053] The present invention can also be used as a soil nail for slope protection in the above-mentioned use case. One steel bar is lengthened to the length of the soil nail, and the other three steel bars remain at the original length to play a fixing role. The soil nails can be placed according to their positions, and can be used as soil nails and can also control the spraying thickness of concrete. Figure 6 .

[0054] Example 2

[0055] When the present invention is used in a cast-in-place concrete slab, the thickness of the protective layer and the position of the steel bars of the slab can be controlled. The use of the positioning points in the slab has a certain degree of adjustment. The first positioning point A is the fixing position of the surface reinforcement, and the second positioning point B is the fixing position of the bottom reinforcement.

[0056] Example 2 Introduction to each node:

[0057] Positioning point A: U-shaped card positioning point 1. The U-shaped opening is used mainly to facilitate the operation when tying the steel bars, and does not affect the tying of the steel bars and the placement of the vibrating rod during the vibrating construction after the concrete is poured. It is mainly used to fix the position of the ribs and control the distance between the ribs and the surface layer.

[0058] Positioning point B No. 2: U-shaped card positioning point 2. The U-shaped opening is used mainly to comprehensively consider the convenience of operation during steel bar binding, without affecting the steel bar binding and the placement of the vibrating rod during the vibrating construction after concrete pouring. It is mainly used to fix the position of the bottom reinforcement and control the distance between the bottom reinforcement and the formwork.

[0059] Positioning point C: Steel bar positioning groove. The steel bar protrudes 1.5d (d = steel bar diameter) at the U-shaped card positioning point, and the steel bar positioning and binding are carried out. According to the size of the U-shaped card, the steel bar spacing can be effectively controlled in the longitudinal and transverse directions to achieve accurate positioning of the steel bar. See attached Figure 7 .

[0060] When used in cast-in-place concrete slabs: place this steel bar protection layer control tool on the formwork with a plum blossom arrangement spacing of 1.0m for positioning. Tie the steel bars, pass the bottom bars through the components and tie them at the second positioning point B, and pass the surface bars through the components and tie them at the first positioning point A. Thus, a fixed distance is formed between the bottom bars and the formwork, and a fixed distance is also formed between the surface bars and the surface layer. Then pour the concrete until the surface layer position meets the requirements.

[0061] The process flow of the present invention when used in a cast-in-place concrete slab is as follows: measuring and positioning (1.0m-spaced plum blossom arrangement) → tying bottom reinforcement → fixing tool position → checking → tying surface reinforcement → pouring concrete → checking.

[0062] The traditional on-site production of mortar pads to ensure the thickness of the steel bar protection layer has a very unsatisfactory effect. The production of mortar pads is greatly affected by the season, and the thickness is uneven, the error is large, the strength is low, it is difficult to fix, it is easy to break, it falls off and it is not easy to inspect. Compared with the traditional method, from a practical point of view, this method forms a fixed steel bar protection layer thickness at the two positions where the component is fixed. Therefore, during the shotcrete process, you only need to pay attention to spraying the concrete to the surface layer of the component, which is simpler and more convenient to control the thickness of the steel bar protection layer. It is also easy to manage during the on-site construction process, which greatly saves time, and the surface layer is neat and beautiful. The application of the present invention has uniform thickness, small error, good strength, good fixation, not easy to break, and not easy to fall off. In the later quality acceptance process, it is also very simple for measurement and acceptance, saving time.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for using a protective layer thickness control tool that is easy to operate; characterized in that: The invention comprises a first positioning steel bar (1) and a second positioning steel bar (3); wherein the inner surface of the top end of the first positioning steel bar (1) is provided with a docking groove (2); the left and right sides of the first positioning steel bar (1) are respectively provided with a first clamping groove (4) and a second clamping groove (5); the second positioning steel bar (3) is connected to the inside of the docking groove (2) at the top end of the first positioning steel bar (1); the left and right sides of the second positioning steel bar (3) are respectively provided with a first limiting groove (6) and a second limiting groove (7); the inside of the first clamping groove (4) and the first limiting groove (6) are connected with a first clamping hoop (8), the inside of the second clamping groove (5) and the second limiting groove (7) are connected with a second clamping hoop (9), and the first clamping hoop (8) and the second clamping hoop (9) are both in a "U"-shaped structure; When using the simple-to-operate protective layer thickness control tool, first, the top of the second positioning steel bar (3) is inserted into the docking groove (2) provided inside the first positioning steel bar (1), and then the connection between the first positioning steel bar (1) and the second positioning steel bar (3) is welded, and finally the first clamp (8) and the second clamp (9) are respectively inserted into the first limiting groove (6) and the second limiting groove (7), and the two end legs of the first clamp (8) and the second clamp (9) are respectively inserted into the first clamping groove (4) and the second clamping groove (5), and finally the connection between the clamp and the steel bar is welded to complete the assembly of the tool, and the tool is driven into the surface layer of the soil body until the second clamp (9) is reached, and then concrete is sprayed in layers to the first clamp (8) and the "U"-shaped top of the first positioning steel bar (1) to achieve concrete pouring; When the protective layer thickness control tool is used for slope protection: the steel bar protective layer control tool is arranged on the soil surface layer with a plum blossom arrangement spacing of 1.5m; the embedded soil fixed position is driven into the soil until the second positioning point B; after the component is positioned, the steel bars are tied, the steel bars are passed through the component, and the horizontal and vertical steel bars are fixed at the first positioning point A with wires; thus, a fixed distance of 50mm is formed between the steel bars and the soil, and a fixed position of 50mm is also formed between the steel bars and the surface layer; then spraying concrete is carried out, and the thickness of the sprayed concrete reaches the surface layer position, which meets the requirements; The process flow of the protective layer thickness control tool in slope protection: measurement and positioning (1.5m spacing plum blossom arrangement) → fix tool position → anti-collision → tie steel mesh → review → spray concrete → inspection; When the protective layer thickness control tool is used in cast-in-place concrete slabs: the steel bar protective layer control tool is arranged on the formwork with a plum blossom arrangement spacing of 1.0m for positioning; the steel bars are tied, the bottom bars are passed through the components and tied at the second positioning point B, and the surface bars are passed through the components and tied at the first positioning point A; thus, a fixed distance is formed between the bottom bars and the formwork, and a fixed distance is also formed between the surface bars and the surface layer; then concrete is poured, and the requirements are met when the surface layer position is reached; The process flow of using the protective layer thickness control tool in cast-in-place concrete slabs: measurement and positioning (plum blossom arrangement with 1.0m spacing) → tying bottom reinforcement → fixing tool position → review → tying surface reinforcement → pouring concrete → inspection.

2. The method for using the simple-to-operate protective layer thickness control tool according to claim 1, characterized in that: The first clamping groove (4) and the first limiting groove (6) are symmetrically distributed about a longitudinal midline of the first positioning steel bar (1), and the distance between the first clamping groove (4) and the top of the first positioning steel bar (1) is the same as the distance between the first limiting groove (6) and the top of the first positioning steel bar (1).

3. According to the method for using the simple-to-operate protective layer thickness control tool as described in claim 1, the second clamping groove (5) and the second limiting groove (7) are symmetrically distributed about the longitudinal midline of the first positioning steel bar (1), and the distance from the second clamping groove (5) to the top of the first positioning steel bar (1) is the same as the distance from the second limiting groove (7) to the top of the first positioning steel bar (1).

4. According to the method for using the easy-to-operate protective layer thickness control tool according to claim 1, the first positioning steel bar (1) and the second positioning steel bar (3) are welded together.

5. According to the method for using the protective layer thickness control tool with simple operation as claimed in claim 1, the first clamp (8) is respectively connected to the first clamping groove (4) and the first limiting groove (6) by welding.

6. According to the method for using the protective layer thickness control tool with simple operation as claimed in claim 1, the second clamp (9) is respectively welded to the second clamping groove (5) and the second limiting groove (7).

7. According to the method for using the easy-to-operate protective layer thickness control tool according to claim 1, the size of the docking groove (2) matches the outer wall profile of the second positioning steel bar (3).

8. According to the method for using the easy-to-operate protective layer thickness control tool of claim 1, the first clamping groove (4) and the first limiting groove (6) match the outer wall profile of the first clamp (8).

9. According to the method for using the protective layer thickness control tool with simple operation as claimed in claim 1, the second clamping groove (5) and the second limiting groove (7) match the outer wall profile of the second clamp (9).

Images