Novel plate type expansion reinforcing band structure

Abstract

The utility model relates to the technical field of expansion reinforcing bands of super-long structures, in particular to a novel plate type expansion reinforcing band structure which comprises a structure main rib, an expansion concrete part for filling is formed in the middle of the structure main rib in a pouring mode, and shrinkage compensation concrete parts are arranged on the two sides of the expansion concrete part for filling in a pouring mode. A closing-up mesh is connected between the expansive concrete part for filling and the shrinkage-compensating concrete part; the novel closing-in mesh is arranged at the interface of the shrinkage-compensating concrete and the expansive concrete for filling, the novel closing-in mesh is used for replacing a traditional dense-hole steel wire mesh, a steel reinforcement framework does not need to be manufactured, and labor and material expenditure are effectively saved. Meanwhile, a mechanical wedge is formed at an interface of the novel closing-in mesh after concrete is poured, so that the waterproof effect of a joint formed by continuous pouring is ensured. The shrinkage-compensating concrete and the expansive concrete for filling are respectively poured by adopting concrete with different grades and expansive rates, so that temperature cracks and shrinkage cracks in the curing process are avoided, and the overall anti-cracking and waterproof performance is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of super-long structure expansion reinforcement belts, in particular to a novel plate-type expansion reinforcement belt structure. Background Art

[0002] With the continuous development of engineering construction, there are more and more super-long and super-wide structures. Controlling cracks caused by temperature stress and shrinkage deformation is a key and difficult point in the construction of super-long structures. The existence of cracks will affect the safety, waterproofness and durability of the structure. At present, most projects use the method of setting post-casting strips to solve the above problems. However, the construction process of reserving post-casting strips is complicated and has high requirements for construction quality. It is necessary to properly handle the concrete connection at the joints and garbage pollution. The existence of the above factors is likely to lead to problems such as water seepage risk and delays in construction schedule.

[0003] Therefore, how to improve the overall structural stability of the interface of super-long structures, avoid the risk of water seepage caused by improper treatment of the structure and construction methods at the interface, and improve construction efficiency and shorten the construction period is a technical problem that needs to be solved urgently. Utility Model Content

[0004] Based on the above description, the utility model provides a novel plate-type expansion reinforcement belt structure to solve the deficiencies in the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A novel plate-type expansion reinforcement belt structure comprises a structural main reinforcement, wherein the middle part of the structural main reinforcement is cast to form a filling expansion concrete part, and shrinkage compensating concrete parts are cast on both sides of the filling expansion concrete part, and a closing mesh is connected between the filling expansion concrete part and the shrinkage compensating concrete part.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a bent inclined surface is formed on the closing mesh, and a water-swellable water stop strip is arranged on the inclined surface.

[0009] Furthermore, the closing mesh comprises a first vertical surface, an inclined surface and a second vertical surface which are sequentially connected from top to bottom, the closing meshes at both ends of the filling expansive concrete portion are symmetrically arranged, and the width between the first vertical surfaces is greater than the width between the second vertical surfaces.

[0010] Furthermore, non-through punching holes are formed on the first vertical surface and the second vertical surface, and through holes are formed on the inclined surface.

[0011] Furthermore, the closing mesh is a vertical plate structure, and water-stop wing plates are connected to both sides of the middle of the vertical plate, and the ends of the water-stop wing plates are bent upwards.

[0012] Furthermore, waterproof coiled materials are attached to the outer sides of the bottoms of the shrinkage compensating concrete part and the filling expansive concrete part.

[0013] Furthermore, magnesium oxide expansion agent for M-type concrete is added to the shrinkage compensating concrete part, and the amount thereof is 6%-8% of the amount of cementitious material; magnesium oxide expansion agent for M-type concrete is added to the filling expansive concrete part, and the amount thereof is 8%-10% of the amount of cementitious material.

[0014] Furthermore, the main structural reinforcement is provided with transverse reinforcing steel bars covering the filling expansive concrete portion.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] (1) The utility model provides a new type of plate-type expansion reinforcement belt structure, in which a new type of closing mesh is set at the interface between the shrinkage compensating concrete and the filling expansion concrete, which is used to replace the traditional dense mesh, eliminating the need to make a steel skeleton and effectively saving labor and material expenses. At the same time, the new type of closing mesh forms a mechanical wedge at the interface after the concrete is poured, ensuring the waterproof effect of the joint formed by continuous pouring. The shrinkage compensating concrete and the filling expansion concrete are poured with concrete of different grades and expansion rates, respectively, to avoid temperature cracks and shrinkage cracks during the curing process, and further improve the overall crack resistance and waterproof performance.

[0017] (2) The new type of mesh with closed opening in the present invention adopts a bent slope design, non-through punching holes are set on both sides of the mesh, and water-swelling waterstop strips are added, which can further strengthen the integrity of the interface and improve the overall anti-cracking and waterproof performance; The new type of mesh with closed opening in the present invention adopts a waterstop wing plate design, and through punching holes are set on the upper and lower sides of the mesh, which can further strengthen the integrity of the interface and improve the overall anti-cracking and waterproof performance.

[0018] (3) The utility model provides a novel plate-type expansion reinforcement belt structure, which uses filling expansion concrete to replace the post-cast belt to simplify the construction process, shorten the construction period and reduce the project cost.

[0019] (4) The utility model provides a new type of closing mesh, which replaces the traditional dense-pore steel wire mesh or ordinary closing mesh, which not only effectively saves labor and material expenses, but also can further improve the overall anti-cracking and waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structural diagram provided for the first embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the closing mesh in the first embodiment of the utility model;

[0022] Figure 3 for Figure 2 A structural diagram from another perspective;

[0023] Figure 4 The overall structural diagram provided for the second embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the closing mesh in the second embodiment of the utility model;

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Shrinkage compensation concrete part; 2. Filling expansive concrete part; 3. Closing mesh; 31. Punching hole; 32. Through hole; 33. Waterstop wing plate; 4. Structural main reinforcement; 5. Transverse reinforcement steel bar; 6. Water-expanding waterstop strip. DETAILED DESCRIPTION

[0027] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0029] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0030] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0031] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0032] like Figure 1-5 A new type of plate-type expansion reinforcement belt structure shown in the figure includes a grid-shaped structural main reinforcement 4, a filling expansion concrete part 2 is cast in the middle of the structural main reinforcement 4, shrinkage compensation concrete parts 1 are cast on both sides of the filling expansion concrete part 2, and a closing mesh 3 is connected between the filling expansion concrete part 2 and the shrinkage compensation concrete part 1. The width of the filling expansion concrete part 2 is 2 to 2.3 meters. The structural main reinforcement 4 is provided with a transverse reinforcement steel bar 5 covering the filling expansion concrete part 2.

[0033] The shrinkage compensating concrete part 1 is located on both sides of the filling expansive concrete part 2. Due to the expansion and contraction of the concrete structure during the solidification process, a buffer section needs to be arranged in the middle of the shrinkage compensating concrete part 1 so that concretes in different casting sections will not mix with each other. A closing mesh 3 is arranged at the junction of the filling expansive concrete part 2 to form an independent casting space for the filling expansive concrete part 2.

[0034] Embodiment 1:

[0035] The closing mesh 3 should have a protective layer on the upper and lower sides, and the upper and lower layers of steel bars are tied or spot-welded to the closing mesh 3. The closing mesh 3 includes a first vertical surface, an inclined surface, and a second vertical surface connected in sequence from top to bottom. The closing mesh 3 at both ends of the filling expansive concrete part 2 is symmetrically arranged, and the width between the first vertical surfaces is greater than the width between the second vertical surfaces. Non-through punching holes 31 are formed on the first and second vertical surfaces, and through holes 32 are formed on the inclined surface. The non-through punching holes 31 are arranged on both sides of the mesh, and a water-expandable water stop strip 6 is added on the inclined surface, which can further strengthen the integrity of the interface and improve the overall anti-cracking and waterproof performance.

[0036] Specifically, the material of the closing mesh 3 is a 0.5 mm thick galvanized steel plate, the slope height is 150 mm, the angle is 45°, and the upper through hole 40mm, center spacing 60mm; the upper and lower vertical parts use non-through punching holes 31, size 40x20mm, center spacing 60mm; the product process is stamping process, and the width is determined according to the wall thickness of the structure.

[0037] Specifically, the water-swellable waterstop strip 6 is fixed on the closing mesh 3 by a steel wire.

[0038] The expansion rate of shrinkage compensating concrete is less than that of filling expansive concrete. Magnesium oxide expansive agent for M-type concrete is added to shrinkage compensating concrete, and the dosage is 6%-8% of the amount of cementitious materials; magnesium oxide expansive agent for M-type concrete is added to filling expansive concrete, and the dosage is 8%-10% of the amount of cementitious materials. In this way, different expansion forces established during the formation of concrete are used to resist shrinkage forces at different periods, thereby blocking cracks and achieving anti-cracking effect.

[0039] Construction process:

[0040] 1. Concrete trial mixing: Entrust the commodity testing station to conduct trial mixing of expansive concrete, focusing on the control of the dosage of magnesium oxide expansive agent for M-type concrete in super-long concrete construction and reducing the hydration heat of concrete.

[0041] 2. Measurement and layout: According to the design drawings, measure and lay out the position reserved for filling with expansive concrete, leaving a pouring area 2 to 2.3 meters wide.

[0042] 3. Tie up the steel bars and install the closing mesh 3: Tie up the steel bars of the filling expansion concrete with the steel bars of the pouring sections on both sides at the same time. Tie up and down steel bars, transverse reinforcement bars and the new closing mesh 3 by tying or spot welding, and set water-expanding waterstop strips 6.

[0043] 4. Use a one-time continuous pouring method, pour from one side of the shrinkage compensating concrete with a smaller expansion rate to the filling expansion concrete with a larger concrete expansion rate, and then pour to the shrinkage compensating concrete on the other side, without leaving post-casting strips or expansion joints. The concrete strength of the filling expansion concrete is one level higher than that of the concrete on both sides.

[0044] Embodiment 2:

[0045] The main difference from the first embodiment is that the closing mesh 3 is a vertical plate structure, and water stop wing plates 33 are connected to both sides of the middle of the vertical plate, and the ends of the water stop wing plates 33 are bent upward; waterproof membrane (not marked in the figure) is attached to the outer side of the bottom of the shrinkage compensating concrete part 1 and the filling expansive concrete part 2.

[0046] A protective layer should be left on the upper and lower parts of the closing mesh 3, and the upper and lower layers of steel bars are tied or spot welded to the new closing mesh 3; the closing mesh 3 adopts a water-stop wing plate 33 design, which can further strengthen the integrity of the interface and improve the overall anti-cracking and waterproof performance.

[0047] Specifically, the closing mesh 3 is made of 0.5mm thick galvanized steel plate, the water stop wing plate 33 is 0.5mm thick, 150mm wide on one side, and the edge is bent upward at 45°; the upper and lower surfaces of the wing plate are covered with through-type stamped square holes with a size of 40x20mm and a center spacing of 60mm; the product process is a stamping process, and the width is determined according to the wall thickness of the structure.

[0048] The outer sides of the bottoms of the shrinkage compensating concrete part 1 and the filling expansive concrete part 2 are affixed with waterproof membranes to further enhance the overall anti-cracking and waterproof performance of the interface.

[0049] The expansion rate of the shrinkage compensating concrete 1 is less than that of the filling expansive concrete 2. The magnesium oxide expansive agent for M-type concrete is added to the shrinkage compensating concrete 1, and the amount thereof is 6%-8% of the amount of cementitious materials; the magnesium oxide expansive agent for M-type concrete is added to the filling expansive concrete 2, and the amount thereof is 8%-10% of the amount of cementitious materials. In this way, the different expansion forces established in the process of concrete formation are relied upon to resist the shrinkage forces at different periods, thereby blocking cracks and achieving an anti-cracking effect.

[0050] Construction process:

[0051] 1. Concrete trial mixing: Entrust the commodity testing station to conduct trial mixing of expansive concrete, focusing on the control of the dosage of magnesium oxide expansive agent for M-type concrete in super-long concrete construction and reducing the hydration heat of concrete.

[0052] 2. Measurement and layout: According to the design drawings, measure and lay out the positions reserved for filling with expansive concrete, leaving a 2.0-meter-wide pouring area.

[0053] 3. External waterproofing membrane: For the reinforcement belt structure at the bottom plate, after the cushion layer construction is completed, the waterproofing membrane is laid on it; waterproofing membrane is not required for other parts.

[0054] 4. Tie up the steel bars and install the new type of closing mesh 3: Tie up the steel bars of the filling expansion concrete with the steel bars of the pouring sections on both sides at the same time. Tie up and down steel bars, transverse reinforcement bars and the new type of closing mesh 3 by tying or spot welding, and set water-expanding waterstop strips 6.

[0055] 5. Use a one-time continuous pouring method, pour from one side of the shrinkage compensating concrete with a smaller expansion rate to the filling expansion concrete with a larger concrete expansion rate, and then pour to the shrinkage compensating concrete on the other side, without leaving post-casting strips or expansion joints. The concrete strength of the filling expansion concrete is one level higher than that of the concrete on both sides.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of plate-type expansion reinforcement belt structure, It is characterized in that It comprises a main structural reinforcement, wherein a filling expansive concrete part is cast in the middle of the main structural reinforcement, shrinkage compensating concrete parts are cast on both sides of the filling expansive concrete part, a closing mesh is connected between the filling expansive concrete part and the shrinkage compensating concrete part, a bent inclined surface is formed on the closing mesh, a water-expanding waterstop strip is arranged on the inclined surface, the closing mesh comprises a first vertical surface, an inclined surface and a second vertical surface which are sequentially connected from top to bottom, the closing meshes at both ends of the filling expansive concrete part are symmetrically arranged, and the width between the first vertical surfaces is greater than the width between the second vertical surfaces.

2. According to the novel plate-type expansion reinforcement belt structure of claim 1, It is characterized in that Non-through punching holes are formed on the first vertical surface and the second vertical surface, and through holes are formed on the inclined surface.

3. According to the novel plate-type expansion reinforcement belt structure of claim 1, It is characterized in that The closing mesh is a vertical plate structure, and water-stop wing plates are connected to both sides of the middle of the vertical plate, and the ends of the water-stop wing plates are bent upwards.

4. According to the novel plate-type expansion reinforcement belt structure of claim 3, It is characterized in that Waterproof coiled materials are attached to the outer sides of the bottoms of the shrinkage compensating concrete part and the filling expansion concrete part.

5. According to the novel plate-type expansion reinforcement belt structure of claim 1, It is characterized in that The main structural reinforcement is provided with transverse reinforcing steel bars covering the filling expansion concrete portion.

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