Movable formwork system for heightening and transforming existing concrete anti-collision guardrail

Abstract

The utility model discloses a movable formwork system for heightening and transforming an existing concrete crash barrier. The movable formwork system comprises a front formwork, a rear formwork, a fixed pull rod, a front sliding plate, a front fixed connecting plate, a rear sliding plate and a rear fixed connecting plate. The front fixed connecting plate and the rear fixed connecting plate are fixed to the front side and the rear side of the anti-collision guardrail respectively. The front sliding plate is slidably arranged on the front fixed connecting plate in a limiting manner; the rear sliding plate is slidably arranged on the rear fixed connecting plate in a limiting mode. The front template is fixedly arranged at the top of the front sliding plate, and the inner side of the front template is attached to the front side of the anti-collision guardrail; the rear template is fixedly arranged on the top of the rear sliding plate, and the inner side of the rear template is attached to the rear side of the anti-collision guardrail. Two ends of the fixed pull rod are fixedly connected with the tops of the front template and the rear template respectively. The movable formwork system can be fixed to an existing bridge concrete guardrail to complete heightening transformation concrete pouring, has the rapid moving function, and is high in construction efficiency, easy to operate and low in overall cost.

Description

Technical Field

[0001] The embodiments of the utility model belong to the technical field of concrete guardrails, and more specifically, relate to a movable formwork system for heightening and remodeling an existing concrete anti-collision guardrail. Background Art

[0002] When designing highway bridges, in order to ensure driving safety, anti-collision guardrails are usually installed on both sides of the bridge to improve the safety protection capability of the bridge. As of the end of 2017, the total number of highway bridges in service in my country has reached more than 830,000. Due to the different construction years, the design and construction standards adopted are also different. At present, most of the anti-collision guardrails in service are mainly designed and constructed according to old specifications such as "Technical Specifications for Design and Construction of Highway Traffic Safety Facilities" (JTJ 074-94) and "Design Specifications for Highway Traffic Safety Facilities" (JTG D81-2006). With the rapid development of my country's transportation industry in recent years, the traffic volume has increased, and collision accidents have occurred frequently in some special dangerous sections. The current "Design Specifications for Highway Traffic Safety Facilities" (JTG D81-2017) has put forward higher requirements for the safety protection capability of highway bridge guardrails. The bridge anti-collision guardrails designed and constructed using the old specifications in the past can no longer meet the requirements. Therefore, it is necessary to transform and upgrade the existing highway bridge anti-collision guardrails according to the current specifications to meet the safety protection needs of current large-scale and heavy vehicles. Based on this realistic background, in 2019, the Ministry of Transport issued the "Technical Guidelines for the Special Action to Improve the Safety Protection Capabilities of Highway Bridges", aiming to carry out a special action to improve the safety protection capabilities of highway bridges across the country. Looking at the progress of the action, the rebar-embedded heightening of the concrete anti-collision guardrails of existing highway bridges has undoubtedly become the optimal design option for improving safety protection capabilities.

[0003] At this stage, the heightening and upgrading of existing bridge anti-collision guardrails should be carried out without interrupting traffic as much as possible to reduce costs and impacts. This requires that the construction be convenient and fast. The traditional concrete guardrail construction method requires repeated construction steps such as supporting and dismantling formwork. The process is cumbersome and the cycle is long. The accuracy of formwork positioning cannot be guaranteed, and the construction quality is poor.

[0004] Therefore, in combination with the existing technical standards and from an economic and practical perspective, researching and developing a construction formwork device for the heightening, transformation and upgrading of existing highway bridge concrete anti-collision guardrails plays a key role in ensuring the smooth implementation of the design plan. Summary of the invention

[0005] In view of the problems in the prior art of guardrail heightening and upgrading, such as the need for repeated construction of concrete pouring formwork support, poor formwork positioning accuracy, complicated process, and long cycle, the utility model provides a movable formwork system for heightening and upgrading the concrete anti-collision guardrail of an existing bridge to solve such problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a movable formwork system for raising and modifying the concrete anti-collision guardrail of an existing bridge, including: a front sliding plate that is limitedly slidably arranged on a front fixed connecting plate, and the front sliding plate is linearly displaced along the front fixed connecting plate; a rear sliding plate that is limitedly slidably arranged on a rear fixed connecting plate, and the rear sliding plate is linearly displaced along the rear fixed connecting plate; a front formwork that is fixedly arranged on the top of the front sliding plate, and its inner side is in contact with the front side of the anti-collision guardrail; a rear formwork that is fixedly arranged on the top of the rear sliding plate, and its inner side is in contact with the rear side of the anti-collision guardrail; and a plurality of groups of fixed pull rods, whose two ends are respectively fixedly connected to the top of the front formwork and the top of the rear formwork.

[0007] Furthermore, a plurality of groups of limiting rings are symmetrically provided on the top of the front template and the rear template, and the fixed pull rod passes through the corresponding limiting rings and is fastened with nuts, so that the top of the front template and the rear template are connected as a whole.

[0008] Furthermore, the front sliding plate is an L-shaped plate, including a horizontal plate and a vertical plate; the top of the horizontal plate is connected to the fixed end of the front template, and a first limit block is fixedly provided at the bottom, and the first limit block is an inverted T-shaped structure; the top of the vertical plate is vertically fixedly connected to the bottom of the horizontal plate, and a plurality of sets of front pulleys are rotatably provided on the inner side thereof.

[0009] Furthermore, a first sliding groove is opened on the front side of the front fixed connecting plate, the first sliding groove is adapted to the front pulley, and the multiple groups of front pulleys rotate in the first sliding groove, thereby driving the front template to move.

[0010] Furthermore, a first limiting groove is formed at the top of the front fixed connecting plate. The first limiting groove is an inverted T-shaped groove, which is matched with the first limiting block. The first limiting block is slidingly limited in the first limiting groove.

[0011] Furthermore, a first installation groove is formed at the bottom of the first sliding groove, and a groove depth thereof is greater than a length of an end portion of a front fixing anchor bolt. The front fixing anchor bolt passes through the first installation groove to anchor the front fixing connecting plate to the front side of the anti-collision guardrail.

[0012] Furthermore, the rear sliding plate is a through-groove structure, the outer side of the top groove wall is fixedly connected to the rear template, the inner side of the groove wall is symmetrically provided with a second limit block, and a plurality of rear pulleys are rotatably provided at the bottom of the groove.

[0013] Furthermore, the rear fixed connecting plate is fixedly arranged on the rear side of the anti-collision guardrail, and a second slide groove is opened on the rear side thereof; the second slide groove is adapted to the rear pulley, and multiple groups of rear pulleys rotate in the second slide groove, thereby driving the displacement of the rear template.

[0014] Furthermore, the top and bottom of the rear fixed connecting plate are symmetrically provided with second limiting grooves, the second limiting grooves are matched with the second limiting blocks, and the second limiting blocks are dynamically limited and arranged in the second limiting grooves.

[0015] Furthermore, a second mounting groove is opened on the rear side of the rear fixed connecting plate, and the second mounting groove is provided with two groups, which are symmetrically arranged on both sides of the second slide groove opening, and the groove depth is greater than the end length of the rear fixed anchor bolt. The rear fixed anchor bolt passes through the second mounting groove to anchor the rear fixed connecting plate to the rear side of the anti-collision guardrail.

[0016] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0017] (1) The movable formwork system of the utility model drives the front formwork to move linearly along the front fixed connecting plate through the front sliding plate, and drives the rear formwork to move linearly along the rear fixed connecting plate through the rear sliding plate, so that after the front formwork and the rear formwork are cast in sections, they can be quickly advanced to the next casting point without the need to repeatedly dismantle and re-support the formwork, thus saving construction period and reducing construction costs.

[0018] (2) The movable formwork system of the utility model uses anchor bolts to anchor the front and rear fixed connecting plates to the existing concrete guardrail as a whole, thereby ensuring the fixing strength of the formwork; the first limit block is slidingly limited in the first limit groove, thereby increasing the connection strength between the front sliding plate and the front fixed connecting plate; the second limit block is dynamically limited in the second limit groove, thereby increasing the connection strength between the rear sliding plate and the rear fixed connecting plate; the tops of the front formwork and the rear formwork are connected as a whole by a fixed pull rod, thereby increasing the connection strength between the tops of the two; through the above measures, the front formwork and the rear formwork are prevented from being pressed and deflected outward when pouring concrete, the formwork accuracy of the formwork system is improved, and the quality of concrete pouring is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a movable formwork system for heightening and reconstructing an existing bridge concrete anti-collision guardrail in an embodiment of the utility model;

[0020] Figure 2 This is an exploded schematic diagram of a movable template system in an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the front sliding plate in an embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the front fixed connecting plate in the embodiment of the utility model;

[0023] Figure 5 This is a schematic structural diagram of the rear sliding plate in an embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the rear fixed connecting plate in the embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of the structure of the fixed pull rod in the embodiment of the utility model.

[0026] In all the drawings, the same figure marks represent the same technical features, specifically: 1-front template, 2-rear template, 3-fixed pull rod, 4-front sliding plate, 401-first limiting block, 5-front fixed connecting plate, 501-first sliding groove, 502-first limiting groove, 503-first installation groove, 6-front pulley, 7-rear sliding plate, 701-second limiting block, 8-rear fixed connecting plate, 801-second sliding groove, 802-second limiting groove, 803-second installation groove, 9-rear pulley, 10-front fixed anchor bolt, 11-rear fixed anchor bolt, 12-limiting ring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figure 1-7 As shown, the utility model provides a movable formwork system for heightening and renovating an existing concrete anti-collision guardrail, including a front formwork 1, a rear formwork 2, a fixed pull rod 3, a front sliding plate 4, a front fixed connecting plate 5, a rear sliding plate 7 and a rear fixed connecting plate 8. The front fixed connecting plate 5 and the rear fixed connecting plate 8 are respectively fixed to the front and rear sides of the anti-collision guardrail. The front sliding plate 4 is limitedly slidably arranged on the front fixed connecting plate 5, and can be linearly displaced along the front fixed connecting plate 5; the rear sliding plate 7 is limitedly slidably arranged on the rear fixed connecting plate 8, and can be linearly displaced along the rear fixed connecting plate 8. The front formwork 1 is fixedly arranged on the top of the front sliding plate 4, and its inner side is in contact with the front side of the anti-collision guardrail; the rear formwork 2 is fixedly arranged on the top of the rear sliding plate 7, and its inner side is in contact with the rear side of the anti-collision guardrail. The fixed pull rod 3 is provided in multiple groups, and its two ends are fixedly connected to the top of the front formwork 1 and the top of the rear formwork 2, respectively. When the movable formwork of the utility model is used for concrete pouring and heightening of the anti-collision guardrail, the front sliding plate 4 is pushed to slide and displace on the front fixed connecting plate 5, and the rear sliding plate 7 is pushed to slide and displace on the rear fixed connecting plate 8, so that the front formwork 1 and the rear formwork 2 are accurately displaced to the construction section respectively, and the tops of the front formwork 1 and the rear formwork 2 are connected and fixed by the fixed pull rod 3. After the pouring of one mold is completed, the front formwork 1 and the rear formwork 2 are pushed to the position of the next mold to continue the pouring operation. The movable formwork system of the utility model can be fixed on the existing bridge concrete guardrail to complete the concrete pouring, and has the function of quick movement, and has high construction efficiency, simple operation, and low overall cost.

[0029] like Figure 3 As shown, in the embodiment of the utility model, the front sliding plate 4 is an L-shaped plate, including a horizontal plate and a vertical plate. The top of the horizontal plate is connected to the fixed end of the front template 1, and a first limit block 401 is fixedly provided at the bottom, and the first limit block 401 is an inverted T-shaped structure; the top of the vertical plate is vertically fixedly connected to the bottom of the horizontal plate, and a plurality of sets of front pulleys 6 are rotatably provided on the inner side thereof.

[0030] like Figure 4 As shown, the front fixed connecting plate 5 is fixedly arranged at the front side of the anti-collision guardrail, and a first sliding groove 501 is opened at the front side thereof; the first sliding groove 501 is matched with the front pulley 6, and multiple groups of front pulleys 6 can rotate in the first limiting groove 501, thereby driving the displacement of the front template 1. In order to avoid the displacement of the front template 1 during displacement and when pouring concrete, a first limiting groove 502 is also opened on the top of the front fixed connecting plate 5. The first limiting groove 502 is an inverted T-shaped groove, which is matched with the first limiting block 401. The first limiting block 401 is slidingly limited in the first limiting groove 502, so that the front sliding plate 4 maintains a linear displacement when sliding along the front fixed connecting plate 5, and at the same time, the connection strength between the front sliding plate 4 and the front fixed connecting plate 5 is increased, so that the front template 1 is prevented from being pressed and deviated outward when pouring concrete, the mold erection accuracy is improved, and the pouring quality of concrete is guaranteed.

[0031] Furthermore, in order to improve the connection strength between the front fixed connecting plate 5 and the front side of the anti-collision guardrail, the front fixed connecting plate is anchored to the front side of the anti-collision guardrail by passing through the bottom of the first sliding groove 501. In order to prevent the end of the front fixed anchor 10 from hindering the rotation of the front pulley 6, a first installation groove 503 is opened at the bottom of the first sliding groove 501, and the groove depth is greater than the length of the end of the front fixed anchor 10. After passing through the first installation groove 503, the front fixed anchor 10 anchors the front fixed connecting plate 5 to the front side of the anti-collision guardrail. At this time, the end of the front fixed anchor 10 is located in the first installation groove 503, which will not hinder the rotation of the front pulley 6.

[0032] like Figure 5 As shown, the rear sliding plate 7 is a through-groove structure, the outer side of the top groove wall is fixedly connected to the rear template, the inner side of the groove wall is symmetrically provided with a second limit block 701, and a plurality of rear pulleys 9 are rotatably provided at the bottom of the groove.

[0033] like Figure 6As shown, the rear fixed connecting plate 8 is fixedly arranged at the rear side of the anti-collision guardrail, and a second slide groove 801 is opened at the rear side thereof; the second slide groove 801 is matched with the rear pulley 9, and multiple groups of rear pulleys 9 can rotate in the second slide groove 801, thereby driving the displacement of the rear template 2. In order to avoid displacement of the rear template 2 during displacement and when pouring concrete, the top and bottom of the rear fixed connecting plate 8 are symmetrically opened with second limiting grooves 802, respectively, and the second limiting grooves 802 are matched with the second limiting blocks, and the second limiting blocks are dynamically limited in the second limiting grooves 802, so that the rear template 2 maintains a linear displacement when sliding along the rear fixed connecting plate 8, and at the same time, the connection strength between the rear sliding plate 7 and the rear fixed connecting plate 8 is increased, so as to avoid the rear template 2 from being pressed and deviating outward when pouring concrete, and ensure the pouring accuracy of concrete.

[0034] Furthermore, in order to improve the connection strength between the rear fixed connecting plate 8 and the rear side of the anti-collision guardrail, the rear fixed connecting plate 8 is anchored to the rear side of the anti-collision guardrail by using the rear fixed anchor bolt 11. In order to avoid the difference in the anchoring depths of the plurality of rear fixed anchor bolts 11, which causes the rear fixed anchor bolt 11 to conflict with the rear sliding plate 7 and makes it impossible for the rear sliding plate 7 to be installed on the rear fixed connecting plate 8, a second installation groove 803 is provided on the rear side of the rear fixed connecting plate 8. The second installation groove 803 is provided with two groups, which are symmetrically arranged on both sides of the notch of the second slide groove 801, and the groove depth is greater than the length of the end of the rear fixed anchor bolt 11. After the rear fixed anchor bolt 11 passes through the second installation groove 803, the rear fixed connecting plate 8 is anchored to the rear side of the anti-collision guardrail. At this time, the end of the rear fixed anchor bolt 11 is located in the second installation groove 803, and will not conflict with the rear sliding plate 7, and will not affect the installation of the rear sliding plate 7.

[0035] like Figure 7 As shown, a plurality of groups of limiting rings 12 are symmetrically provided on the top of the front formwork 1 and the rear formwork 2, and the fixed pull rod 3 passes through the corresponding limiting rings 12 and is fastened with a nut, so that the top of the front formwork 1 and the rear formwork 2 are connected as a whole, avoiding the front formwork 1 and the rear formwork 2 from being pressed and deflected outward when pouring concrete, thereby ensuring the pouring quality of concrete.

[0036] The movable formwork system of the utility model, when operating, respectively drills anchor holes at corresponding positions on the front and rear sides of the existing concrete anti-collision guardrail, uses the front fixed anchor bolt 10 to anchor the front fixed connecting plate 5 to the front side of the anti-collision guardrail, and uses the rear fixed connecting plate 8 to anchor the rear fixed connecting plate 8 to the rear side of the anti-collision guardrail; the front sliding plate 4 is installed on the front fixed connecting plate 5, and the rear sliding plate 7 is installed on the rear fixed connecting plate 8; the front formwork 1 and the rear formwork 2 are pushed to move to the pouring construction point, and the top of the front formwork 1 and the rear formwork 2 are connected as a whole by the fixed pull rod 3; the front formwork 1 and the rear formwork 2 are sprayed with a release agent, and concrete is poured after completion; after the concrete is formed, the fixed pull rod 3 is released to separate the front formwork 1 and the rear formwork 2 from the concrete; the front formwork 1 and the rear formwork 2 are pushed to the next pouring point for operation.

[0037] The movable formwork system of the present invention drives the front formwork 1 to move linearly along the front fixed connecting plate 5 through the front sliding plate 4, and drives the rear formwork 2 to move linearly along the rear fixed connecting plate 8 through the rear sliding plate 7, so that the front formwork 1 and the rear formwork 2 can quickly reach the pouring point without repeating the positioning and supporting formwork operations, thereby accelerating the construction efficiency and improving the formwork positioning accuracy.

[0038] The movable formwork system of the utility model has a first limit block 401 that is slidably limited in the first limit groove 502, thereby increasing the connection strength between the front sliding plate 4 and the front fixed connecting plate 5; a second limit block that is dynamically limited in the second limit groove 802, thereby increasing the connection strength between the rear sliding plate 7 and the rear fixed connecting plate 8; the front formwork 1 and the rear formwork 2 are connected as a whole at the top by the fixed pull rod 3, thereby increasing the connection strength at the top of the two; through the above measures, the front formwork 1 and the rear formwork 2 are prevented from being pressed and deflected outward when pouring concrete, thereby improving the pouring accuracy of concrete.

[0039] It will be easily understood by those skilled in the art that 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 and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A movable formwork system for heightening and remodeling existing concrete anti-collision guardrails, characterized in that: include: A front fixed connecting plate (5) and a rear fixed connecting plate (8) respectively fixed to the front and rear sides of the anti-collision guardrail; A front sliding plate (4) is limitedly slidably arranged on the front fixed connecting plate (5), and the front sliding plate (4) moves linearly along the front fixed connecting plate (5); A rear sliding plate (7) is limitedly slidably arranged on the rear fixed connecting plate (8), and the rear sliding plate (7) is linearly displaced along the rear fixed connecting plate (8); A front template (1) fixedly arranged on the top of the front sliding plate (4), the inner side of which is in contact with the front side of the anti-collision guardrail; A rear template (2) fixedly arranged on the top of the rear sliding plate (7), the inner side of which is in contact with the rear side of the anti-collision guardrail; A plurality of groups of fixed pull rods (3) are provided, and two ends of the fixed pull rods are respectively fixedly connected to the top of the front template (1) and the top of the rear template (2).

2. The movable formwork system for heightening and remodeling an existing concrete anti-collision guardrail according to claim 1 is characterized in that: The tops of the front template (1) and the rear template (2) are symmetrically provided with a plurality of groups of limiting rings (12); the fixed pull rods (3) pass through the corresponding limiting rings (12) and are fastened with nuts, so that the tops of the front template (1) and the rear template (2) are connected as one.

3. A movable formwork system for heightening and renovating an existing concrete anti-collision guardrail according to any one of claims 1-2, characterized in that: The front sliding plate (4) is an L-shaped plate, comprising a horizontal plate and a vertical plate; the top of the horizontal plate is connected to the fixed end of the front template (1), and a first limit block (401) is fixedly provided at the bottom, and the first limit block (401) is an inverted T-shaped structure; the top of the vertical plate is vertically fixedly connected to the bottom of the horizontal plate, and a plurality of front pulleys (6) are rotatably provided on the inner side thereof.

4. The movable formwork system for heightening and remodeling an existing concrete anti-collision guardrail according to claim 3 is characterized in that: A first sliding groove (501) is formed on the front side of the front fixed connecting plate (5), and the first sliding groove (501) is adapted to the front pulley (6). The plurality of groups of front pulleys (6) rotate in the first sliding groove (501), thereby driving the front template (1) to move.

5. The movable formwork system for heightening and remodeling an existing concrete anti-collision guardrail according to claim 4 is characterized in that: The top of the front fixed connecting plate (5) is also provided with a first limiting groove (502), which is an inverted T-shaped groove and is compatible with the first limiting block (401), and the first limiting block (401) is slidably limited in the first limiting groove (502).

6. The movable formwork system for heightening and remodeling an existing concrete anti-collision guardrail according to claim 4 is characterized in that: The first sliding groove (501) has a first installation groove (503) at its bottom, the groove depth of which is greater than the length of the end of the front fixing anchor bolt (10). The front fixing anchor bolt (10) passes through the first installation groove (503) to anchor the front fixing connecting plate (5) to the front side of the anti-collision guardrail.

7. A movable formwork system for heightening and renovating an existing concrete anti-collision guardrail according to any one of claims 1-2, characterized in that: The rear sliding plate (7) is a through-slot structure, the outer side of the top slot wall of which is fixedly connected to the rear template (2), the inner side of the slot wall is symmetrically provided with a second limit block (701), and the bottom of the slot is rotatably provided with a plurality of rear pulleys (9).

8. The movable formwork system for heightening and remodeling an existing concrete anti-collision guardrail according to claim 7 is characterized in that: The rear fixed connecting plate (8) is fixedly arranged on the rear side of the anti-collision guardrail, and a second sliding groove (801) is opened on the rear side; the second sliding groove (801) is adapted to the rear pulley (9), and multiple groups of rear pulleys (9) rotate in the second sliding groove (801), thereby driving the rear template (2) to move.

9. The movable formwork system for heightening and remodeling an existing concrete anti-collision guardrail according to claim 7 is characterized in that: The top and bottom of the rear fixed connecting plate (8) are symmetrically provided with second limiting grooves (802), the second limiting grooves (802) are matched with the second limiting blocks, and the second limiting blocks are movably limited and arranged in the second limiting grooves (802).

10. The movable formwork system for heightening and renovating an existing concrete anti-collision guardrail according to claim 8 is characterized in that: A second mounting groove (803) is provided on the rear side of the rear fixed connecting plate (8), and the second mounting groove (803) is provided with two groups, which are symmetrically arranged on both sides of the groove opening of the second slide groove (801), and the groove depth is greater than the end length of the rear fixed anchor bolt (11). The rear fixed anchor bolt (11) passes through the second mounting groove (803) to anchor the rear fixed connecting plate (8) to the rear side of the anti-collision guardrail.

Images