Construction device for mass concrete constraint crack

Abstract

The utility model relates to the technical field of concrete restrained cracks, and discloses a construction device for mass concrete restrained cracks, which comprises a bottom plate. According to the construction device for the mass concrete constraint crack, by arranging the tensile mechanisms, the stress ribs, the supporting mechanisms and the fixing connectors, when the construction device is used, the peripheries of the first pouring abutment and the second pouring abutment are spliced through main supporting plates and side supporting plates and then fixed to the bottom plate; then telescopic rods on fixing connectors on the surfaces of the main supporting plate and the side supporting plates are rotated to proper positions, connecting blocks on one sides of the telescopic rods are fixed through threads, preformed holes are formed in the first pouring abutment before pouring, and two sets of stress ribs are inserted into the preformed holes; tension of the stress rib can be adjusted by screwing the tension nuts on the surfaces of the threaded rods on the two sides of the stress rib, and the situation that concrete shrinks and temperature changes in the hardening process, consequently, a concrete structure generates internal tension, and cracks are caused is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete restrained cracks, in particular to a construction device for restraining cracks in large-volume concrete. Background Art

[0002] There are many large-volume piers in wharf projects. Due to their large thickness and considering the bearing capacity of the clamped piles, large-volume piers are generally cast in layers. The thickness of the first-cast pier concrete is generally controlled at 500-600mm, and the thickness of the second-cast pier concrete is the remaining pier height. The time interval between the first and second castings of the pier is generally about 10 days. When the second-cast pier concrete is cast, the concrete strength of the first-cast pier basically reaches the design strength, and the curing and shrinkage of the concrete is basically completed. At this time, the second-cast pier concrete will continue to shrink during the curing process after casting. However, the shrinkage of the first-cast pier concrete is basically completed in the early stage, and the concrete of the two casts cannot shrink synchronously. The first-cast pier concrete will limit the shrinkage of the second-cast pier concrete. At this time, the strength of the second-cast pier concrete is low, and it cannot resist the restrained cracking force. If no measures are taken, the second-cast pier concrete will produce restrained cracks, affecting the quality of the concrete. By actively compressing the once-cast pier concrete, the concrete of the once-cast pier and the concrete of the second-cast pier can shrink synchronously, greatly reducing the constraint of the once-cast pier concrete on the second-cast pier concrete, and reducing or even completely avoiding the constraint cracks of the once-cast pier concrete on the second-cast pier concrete.

[0003] Traditional restraint devices require drilling holes or installing fixtures on the concrete surface, which will destroy the integrity of the concrete surface and increase the complexity of construction. Therefore, a construction device for restraining cracks in large-volume concrete is proposed.

[0004] A construction device for controlling the restrained cracks of large-volume pier concrete disclosed in the announcement number CN216948283U, although, the construction device for controlling the restrained cracks of large-volume pier concrete, the construction device includes a pile, a pile clamp is arranged on the upper part of the pile, a supporting steel beam is arranged on the upper part of the pile clamp, a distribution beam is arranged on the upper part of the supporting steel beam, a pier bottom form is laid on the upper part of the distribution beam, a first casting pier is arranged on the upper part of the pier bottom form, a second casting pier is arranged on the upper part of the first casting pier, a pier compression module is arranged in the first casting pier, the pier compression module includes prestressed tendons, a force transmission steel beam and a tensioning jack, a reserved hole is preset in the first casting pier, the prestressed tendons are arranged in the reserved hole, and the force transmission steel beam is arranged on the side of the first casting pier. The utility model greatly reduces the constraint of the first casting pier concrete on the second casting pier concrete, reduces or even completely avoids the restrained cracks of the first casting pier concrete on the second casting pier concrete.

[0005] Although the above patent has greatly reduced the constraint of the first cast pier concrete on the second cast pier concrete, and reduced or even completely avoided the constraint cracks of the first cast pier concrete on the second cast pier concrete; however, the device lacks the function of supporting the cast piers around, and only relies on the internal stress reinforcement to enhance the tensile strength of the concrete. There are still some potential problems and risks. The concrete may shrink and change temperature during the hardening process, which may cause internal tension in the concrete structure, thereby causing cracks. If there is a lack of sufficient support around, these internal tensions may cause the structure to become unstable or cracks to expand.

[0006] Therefore, it is necessary to invent a construction device for restraining cracks in large-volume concrete to solve the above problems. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] The technical problem solved by the utility model is to provide a construction device for restraining cracks in large-volume concrete, which is highly practical, can be easily operated, and has a relatively simple structure, thereby solving the problem of lack of support around the casting pier raised in the above-mentioned background technology.

[0009] (II) Technical solution

[0010] To achieve the above objectives, the utility model is implemented through the following technical solutions: a construction device for constraining cracks in large-volume concrete, comprising a base plate, a first casting pier fixedly connected to the top of the base plate, a second casting pier fixedly connected to the top of the first casting pier, side support plates threadedly connected to both sides of the first casting pier and the second casting pier, a main support plate threadedly connected to the front and back sides of the first casting pier and the second casting pier, a magnetic attraction mechanism fixedly connected to the surface of the main support plate, a magnetic block magnetically connected to one side of the magnetic attraction mechanism, the magnetic block fixedly connected to the inside of a placement groove opened on the surface of the side support plate, a fixed joint fixedly connected to the surfaces of the side support plate and the main support plate, a support mechanism rotatably connected to the surface of the fixed joint, a reserved hole opened in the first casting pier, a tensile mechanism inserted in the reserved hole, and a stress rib fixedly connected to the middle of the surface of the tensile mechanism.

[0011] As a further solution of the utility model, the magnetic attraction mechanism includes a battery fixedly connected to the surface of the main support plate, one side of the battery is electrically connected to an electromagnet through a power line, the electromagnet is magnetically connected to one side of the magnetic block, and the electromagnet is fixedly connected to both sides of the main support plate. The electromagnet facilitates fixing the main support plate and the side support plate.

[0012] As a further solution of the utility model, the supporting mechanism includes a telescopic rod rotatably connected to the surface of the fixed joint, one side of the telescopic rod is rotatably connected to a connecting block, the connecting block is threadedly connected to the surface of the base plate, and three groups of limiting holes are provided on the surface of the telescopic rod, one group of the limiting holes is plugged with a pin, and the connecting block facilitates supporting the telescopic rod.

[0013] As a further solution of the utility model, the tensile mechanism includes a threaded rod inserted into the reserved hole, the surface of the threaded rod is threadedly connected with a tensioning nut, the stress tendon is fixedly connected to the middle part of the threaded rod, and the tensioning nut facilitates the adjustment of tension.

[0014] As a further solution of the utility model, the bottom of the bottom plate is fixedly connected to a supporting pile, and the bottom of the supporting pile is fixedly connected to a base, and the base is convenient for supporting the bottom plate.

[0015] As a further solution of the utility model, the four groups on the surface of the base are fixedly connected with ground pestles, and the material of the ground pestles is stainless steel, which is convenient for improving the stability of the equipment.

[0016] As a further solution of the utility model, threaded holes are provided on the surfaces of the side support plate and the main support plate, and the internal threads of the threaded holes are connected with threaded columns, which are convenient for fixing the side support plate and the main support plate.

[0017] (III) Beneficial effects

[0018] The utility model provides a construction device for restraining cracks in large-volume concrete, which has the following beneficial effects:

[0019] 1. The construction device for restraining cracks in large-volume concrete is provided with a tensile mechanism, stress tendons, a supporting mechanism, and a fixed joint. When in use, the main support plate and the side support plate are spliced ​​around the first casting pier and the second casting pier and then fixed on the bottom plate. Then, the telescopic rods on the fixed joints on the surfaces of the main support plate and the side support plate are rotated to a suitable position, and the connecting block on one side of the telescopic rod is fixed with a thread. Before casting, a reserved hole is provided inside the first casting pier, and two groups of stress tendons are inserted inside the reserved hole. The tension nuts on the surface of the threaded rods on both sides of the stress tendons can be twisted to adjust the tension of the stress tendons, so as to avoid shrinkage and temperature changes of the concrete during the hardening process, which may cause internal tension in the concrete structure and thus cause cracks.

[0020] 2. The construction device for restraining cracks in large-volume concrete is equipped with a magnetic suction mechanism, a magnetic block, a main support plate and a side support plate. When the frame is installed, the power is turned on to energize the electromagnets on both sides of the main support plate to generate magnetic force. When the magnetic block inside the groove on the surface of the side support plate contacts the electromagnet, the main support plate and the side support plate can be quickly spliced. The connection is made by magnetic suction, and there is no need to drill holes on the concrete surface or install fixing devices, thereby avoiding damaging the integrity of the concrete surface and increasing the complexity of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the magnetic attraction mechanism of the utility model;

[0023] Figure 3 This is a schematic diagram of the support mechanism structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the tensile mechanism of the utility model.

[0025] In the figure: 1. bottom plate; 2. first casting pier; 3. second casting pier; 4. side support plate; 5. main support plate; 6. magnetic attraction mechanism; 601. battery; 602. electromagnet; 7. magnetic block; 8. fixed joint; 9. support mechanism; 901. telescopic rod; 902. connecting block; 903. latch; 10. tensile mechanism; 1001. threaded rod; 1002. tensioning nut; 11. stress tendon; 12. support pile; 13. base; 14. pestle; 15. threaded column. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 4 The utility model provides a technical solution: a construction device for restraining cracks in large-volume concrete, comprising a bottom plate 1, a first pouring pier 2 is fixedly connected to the top of the bottom plate 1, a second pouring pier 3 is fixedly connected to the top of the first pouring pier 2, side support plates 4 are threadedly connected to both sides of the first pouring pier 2 and the second pouring pier 3, main support plates 5 are threadedly connected to the front and back of the first pouring pier 2 and the second pouring pier 3, a magnetic attraction mechanism 6 is fixedly connected to the surface of the main support plate 5, and the magnetic attraction mechanism 6, the magnetic block 7 and the main support plate 5 and the side support plate 4 are arranged to avoid damaging the integrity of the concrete surface and increasing the complexity of construction. One side of the magnetic attraction mechanism 6 is magnetically connected to a magnetic block 7, and the magnetic block 7 is fixedly connected to the inside of a placement groove opened on the surface of the side support plate 4. The surfaces of the side support plate 4 and the main support plate 5 are fixedly connected to a fixed joint 8, and the surface of the fixed joint 8 is rotatably connected to a support mechanism 9. Through the arrangement of the tensile mechanism 10, the stress ribs 11, the support mechanism 9, and the fixed joint 8, the concrete is prevented from shrinking and changing in temperature during the hardening process, which causes internal tension in the concrete structure and causes cracks. A reserved hole is opened inside the first casting pier 2, and the tensile mechanism 10 is inserted inside the reserved hole, and the stress ribs 11 are fixedly connected to the middle of the surface of the tensile mechanism 10;

[0028] See also Figure 2 The magnetic attraction mechanism 6 includes a battery 601 fixedly connected to the surface of the main support plate 5, one side of the battery 601 is electrically connected to an electromagnet 602 through a power line, the electromagnet 602 is magnetically connected to one side of the magnetic block 7, and the electromagnet 602 is fixedly connected to both sides of the main support plate 5, and the electromagnet 602 is convenient for fixing the main support plate 5 and the side support plate 4;

[0029] See also Figure 3 The support mechanism 9 includes a telescopic rod 901 rotatably connected to the surface of the fixed joint 8, one side of the telescopic rod 901 is rotatably connected to a connecting block 902, the connecting block 902 is threadedly connected to the surface of the bottom plate 1, and three groups of limiting holes are opened on the surface of the telescopic rod 901, and a latch 903 is inserted into the inside of one group of limiting holes, so that the connecting block 902 is convenient for supporting the telescopic rod 901;

[0030] See also Figure 4The tensile mechanism 10 includes a threaded rod 1001 inserted into the reserved hole, a tensioning nut 1002 is threadedly connected to the surface of the threaded rod 1001, and the stress tendon 11 is fixedly connected to the middle of the threaded rod 1001. The tensioning nut 1002 is convenient for adjusting the tension;

[0031] See also Figure 1 The bottom of the bottom plate 1 is fixedly connected with a support pile 12, and the bottom of the support pile 12 is fixedly connected with a base 13, and the base 13 is convenient for supporting the bottom plate 1;

[0032] See also Figure 1 The four groups on the surface of the base 13 are all fixedly connected with a ground pestle 14, and the material of the ground pestle 14 is stainless steel, which is convenient for improving the stability of the equipment.

[0033] See also Figure 1 The surfaces of the side support plate 4 and the main support plate 5 are both provided with threaded holes, and the internal threads of the threaded holes are connected with threaded columns 15, which are convenient for fixing the side support plate 4 and the main support plate 5.

[0034] In the utility model, the working steps of the device are as follows:

[0035] The first step: when in use, the main support plate 5 and the side support plate 4 are spliced ​​around the first casting pier 2 and the second casting pier 3 and then fixed on the bottom plate 1, and then the telescopic rod 901 on the fixed joint 8 on the surface of the main support plate 5 and the side support plate 4 is rotated to a suitable position, and the connecting block 902 on one side of the telescopic rod 901 is fixed with a thread. Before casting, a reserved hole is set inside the first casting pier 2, and two groups of stress tendons 11 are inserted inside the reserved hole. The tensioning nuts 1002 on the surface of the threaded rods 1001 on both sides of the stress tendons 11 can be twisted to adjust the tension of the stress tendons 11;

[0036] The second step: when installing the frame, turn on the power so that the electromagnets 602 on both sides of the main support plate 5 are energized to generate magnetic force. When the magnetic block 7 inside the groove on the surface of the side support plate 4 contacts the electromagnet 602, the main support plate 5 and the side support plate 4 can be quickly spliced ​​together. They are connected by magnetic attraction without drilling holes on the concrete surface or installing fixing devices.

[0037] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0038] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0039] 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 construction device for restraining cracks in large-volume concrete, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to a first pouring pier (2), the top of the first pouring pier (2) is fixedly connected to a second pouring pier (3), both sides of the first pouring pier (2) and the second pouring pier (3) are threadedly connected to side support plates (4), the front and back sides of the first pouring pier (2) and the second pouring pier (3) are threadedly connected to main support plates (5), the surface of the main support plate (5) is fixedly connected to a magnetic attraction mechanism (6), one side of the magnetic attraction mechanism (6) The side magnetic connection is provided with a magnetic block (7), the magnetic block (7) is fixedly connected to the inside of a placement groove provided on the surface of the side support plate (4), the surfaces of the side support plate (4) and the main support plate (5) are both fixedly connected with a fixed joint (8), the surface of the fixed joint (8) is rotatably connected with a support mechanism (9), a reserved hole is provided inside the first casting pier (2), a tensile mechanism (10) is inserted inside the reserved hole, and a stress rib (11) is fixedly connected to the middle of the surface of the tensile mechanism (10).

2. A construction device for restraining cracks in large-volume concrete according to claim 1, characterized in that: The magnetic attraction mechanism (6) comprises a storage battery (601) fixedly connected to the surface of the main support plate (5); one side of the storage battery (601) is electrically connected to an electromagnet (602) via a power line; the electromagnet (602) is magnetically connected to one side of a magnetic block (7); and the electromagnet (602) is fixedly connected to both sides of the main support plate (5).

3. A construction device for restraining cracks in large-volume concrete according to claim 1, characterized in that: The support mechanism (9) comprises a telescopic rod (901) rotatably connected to the surface of the fixed joint (8); one side of the telescopic rod (901) is rotatably connected to a connecting block (902); the connecting block (902) is threadedly connected to the surface of the bottom plate (1); and three groups of limiting holes are provided on the surface of the telescopic rod (901); a latch (903) is inserted into the interior of one group of the limiting holes.

4. The construction device for restraining cracks in large-volume concrete according to claim 1 is characterized by: The tensile mechanism (10) comprises a threaded rod (1001) inserted into a reserved hole, a tensioning nut (1002) is threadedly connected to the surface of the threaded rod (1001), and the stress rib (11) is fixedly connected to the middle of the threaded rod (1001).

5. The construction device for restraining cracks in large-volume concrete according to claim 1, characterized in that: The bottom of the base plate (1) is fixedly connected to a support pile (12), and the bottom of the support pile (12) is fixedly connected to a base (13).

6. A construction device for restraining cracks in large-volume concrete according to claim 5, characterized in that: Four groups of surfaces of the base (13) are fixedly connected with ground-piercing pestles (14), and the material of the ground-piercing pestles (14) is stainless steel.

7. The construction device for restraining cracks in large-volume concrete according to claim 1, characterized in that: The surfaces of the side support plate (4) and the main support plate (5) are both provided with threaded holes, and the internal threads of the threaded holes are connected with threaded columns (15).

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