Combined formwork of cantilever type anti-collision wall

Abstract

The utility model discloses a combined formwork of a cantilever type anti-collision wall. The combined formwork of the cantilever type anti-collision wall comprises an inner formwork body located on an existing building structure. The outer formwork is connected with the inner formwork and abuts against the bottom of the existing building structure, a reinforcing piece is arranged on the top of the outer formwork, an adjusting assembly is connected to the reinforcing piece, and the adjusting assembly is connected with the top of the inner formwork through a connecting piece; inclined struts far away from the inner formwork are arranged at the top of the inner formwork and located at the bottom of the adjusting assembly. An expanding cavity structure of which the width is gradually increased is formed between the inner template and the outer template from top to bottom.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel formwork structures in infrastructure, and in particular relates to a combined formwork for a cantilever type anti-collision wall. Background Art

[0002] Cantilever crash barriers are mostly used in infrastructure construction. They mainly act as buffer walls to reduce impact damage. They are generally used in various infrastructure construction such as roads, bridges, and guardrails. Since vehicle collisions and other accidents occur frequently in bridges, and the hazards and impacts caused by the accidents are also relatively severe, the application of crash barriers in bridges is even more important.

[0003] However, in the prior art, in some construction environments, the main beam and other structures are relatively special. Although the upper part can bear part of the formwork, the side part lacks support. Therefore, when using the crash barrier, the side part needs to be well fitted. However, most of the formworks in the prior art are much lower than the main beam or other existing building structures, resulting in a height difference between the existing structure and the bottom of the formwork, resulting in poor stability. Utility Model Content

[0004] The utility model aims to provide a combined formwork for a cantilever anti-collision wall, which utilizes abutment to support the bottom of an existing building structure, and the setting of an expanded diameter cavity facilitates casting to form a high-strength anti-collision wall.

[0005] In order to achieve the above technical effects, the utility model is implemented through the following technical solutions.

[0006] The modular formwork of the cantilever crash wall comprises:

[0007] Internal formwork located on an existing building structure;

[0008] An outer formwork connected to the inner formwork and abutting against the bottom of the existing building structure, wherein a reinforcement is provided on the top of the outer formwork, an adjustment component is connected to the reinforcement, and the adjustment component is connected to the top of the inner formwork by a connector;

[0009] The top of the inner template is located at the bottom of the adjustment assembly and is provided with an oblique support away from the inner template;

[0010] From top to bottom, an expanded cavity structure with gradually increasing width is formed between the inner template and the outer template.

[0011] In the present technical solution, inner and outer formworks are provided, and the added reinforcements and adjustment components can well form a certain pulling effect with the diagonal braces, thereby ensuring the balance of the entire formwork and the stability of the force during pouring, thereby improving efficiency.

[0012] In this technical solution, the bottom of the outer formwork abuts against the existing building structure to support the existing building structure. At the same time, it can also be used when the bottom of the existing building structure is a higher point on the slope, and at this time, it can provide good support as a whole.

[0013] In the technical solution, an expanded diameter cavity structure is formed. During pouring, the bearing width of the bottom of the expanded diameter cavity is larger and the stability is good. Therefore, there will not be too many other problems in the later pouring from bottom to top, and the pouring efficiency is high and the stability is good.

[0014] Furthermore, from top to bottom, the inner template includes a transition section, a diagonal support section, a force-bearing section and a load-bearing section in sequence, and the transition section is an arc section arranged away from the outer template.

[0015] In the present technical solution, a stress-bearing section and a load-bearing section are added, so that during use, the stress-bearing section not only has to bear the stress during pouring, but also has to bear the downward force from the transition section and the diagonal brace, while the load-bearing section forms a load-bearing surface to bear the stress-bearing section and disperse its stress.

[0016] Furthermore, the oblique support section and the force-bearing section are both inclined surfaces, and the slope of the oblique support section is greater than the slope of the force-bearing section, and the length of the oblique support section is less than the length of the force-bearing section.

[0017] In the present technical solution, the diagonal bracing section is not only steep but also long. This arrangement allows the casting cavity to gradually widen at the top instead of being very wide all at once, thus forming a more ideal crash barrier with a good overall thickness, saving materials.

[0018] Furthermore, a first pair of tie screws for connecting with the outer formwork is provided on the bearing section, and the first pair of tie screws is arranged close to the existing building structure.

[0019] In this technical solution, the first pair of tension screws is arranged in the bearing section, which not only ensures the stability of the existing building structure, but also forms the lowest bearing, providing a basis for stability in the later pouring.

[0020] Furthermore, the outer formwork includes an inclined section connected to the inner formwork and a hook section supporting and abutting against the existing building structure, and the end of the hook section forms an abutting portion abutting against the bottom of the structural building structure.

[0021] In this technical solution, the inclined section is integrally formed and cooperates with the hook section, so that the entire cantilever structure is more obvious. At the same time, the hook abuts against the existing building structure to form a better support, and the inclined section provides a foundation for the subsequent expansion cavity, and is not segmented, so it has good stability.

[0022] Furthermore, it also includes a groove structure connecting the existing building structure and the external template, the bottom of the groove structure fits with the existing building structure, and the side of the existing building structure fits with the side of the hook section in the external template.

[0023] In this technical solution, the muscle-building grooves increase the fit, and various supports can be added to the bottom of the grooves, providing a basis for subsequent further structural improvements. The grooves serve as connectors to improve the overall stability.

[0024] Furthermore, it also includes a second tension screw rod connecting the reinforcement member and the adjustment assembly, and the end of the diagonal support is arranged close to the second tension screw rod.

[0025] In this technical solution, the second tensioning screw is not directly connected to the two formworks, but is connected using reinforcements and adjustment components. On the one hand, the entire pouring can be fully poured without being blocked by the second tensioning screw. Secondly, the height of the pouring cavity can be adjusted by adjusting the position of the second tensioning screw. Finally, it can also form a force-bearing structure with diagonal braces to decompose the force.

[0026] Furthermore, it also includes a reinforcing plate that connects the adjustment component and the inner template and is located on the sides of both, and the diagonal brace is connected to the second tension screw through the reinforcing plate.

[0027] In this technical solution, a reinforcing plate is added to make the inner formwork closer to the side of the diagonal brace stronger. At this time, when the entire force is applied, there are more force points and decomposition points, which increases the strength of the side and provides a basis for further stability.

[0028] Furthermore, the connecting piece is an L-shaped structure, and a triangular ribbed plate is arranged inside the L-shaped structure.

[0029] In this technical solution, an L-shaped structure is selected to form a frame assembly together with the second tension screw and the adjustment assembly. The entire structure has a certain degree of closedness, which reduces external interference during construction and forms a limit cavity, which has a guiding and limiting effect on construction.

[0030] Furthermore, the adjusting component is a suspension rod, and a pushing component is arranged on the suspension rod near the L-shaped structure.

[0031] In the present technical solution, a jacking assembly is provided, so that the length of the suspension rod can be adjusted, and different L-shaped structures can be matched to adapt to different construction requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of the combined formwork of the cantilever anti-collision wall provided by the utility model;

[0033] Figure 2 A schematic diagram of the structure of the inner template provided by the utility model;

[0034] Figure 3 A schematic diagram of the structure of the outer template provided by the utility model;

[0035] In the figure:

[0036] 100. Formwork structure; 110. Inner formwork; 111. Transition section; 112. Bracing section; 113. Load-bearing section; 114. Load-bearing section; 120. Outer formwork; 121. Inclined section; 122. Hook section; 130. Reinforcement member; 140. Adjustment assembly; 141. Push assembly; 150. Connector; 151. Ribbed plate; 160. Bracing; 200. Existing building structure; 300. First pair of tension screws; 400. Groove structure; 500. Second pair of tension screws; 600. Reinforcement plate. DETAILED DESCRIPTION

[0037] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0038] Refer to the attached Figure 1-3 As shown, the combined formwork 100 of the cantilever anti-collision wall in this embodiment includes an inner formwork 110 located on the existing building structure 200. At this time, the existing building structure 200 forms a supporting surface to support the inner formwork 110, and the outer formwork 120 is abutted against the bottom of the existing building structure 200. In this embodiment, in order to increase the strength, a reinforcement 130 is provided at the top of the outer formwork 120, and an adjustment component 140 is connected to the reinforcement 130, and the adjustment component 140 is connected to the top of the inner formwork 120 by a connecting member 150; in this embodiment, the adjustment component, the reinforcement and the connecting member are added, so that a good limiting shielding is formed above the formwork, so that it has a certain isolation from the outside world, forming a protective effect, and further, in order to ensure force balance, in this embodiment, at the top of the inner formwork 110, located at the bottom of the adjustment component 140, a diagonal brace 160 away from the inner formwork 110 is provided, and at this time, from top to bottom, an expanding cavity structure with a gradually increasing width is formed between the inner formwork 110 and the outer formwork 120.

[0039] First, in this embodiment, inner and outer templates are set, and the added reinforcement and adjustment components can form a certain pulling effect with the diagonal brace, ensuring the balance of the entire template and the stability of the force during pouring, thereby improving efficiency. At this time, using force analysis, it is found that the entire formation is a balanced force frame, which cooperates with pouring and existing building structures, and has good balance and stability.

[0040] Secondly, in this embodiment, the bottom of the outer template 120 is abutted against the existing building structure 200 to support the existing building structure 200. At the same time, it can also be used when the bottom of the existing building structure is a higher point in the slope, and the whole structure can be well supported. Compared with forming a spacing, directly abutting against the existing building structure to ensure the support of its bottom, some existing building structures, such as the main beam, may have an inclined structure at the bottom. At this time, it is necessary to fully consider the balance, and then after the outer template is supported, the lowest point of the whole is at the same height to support the bottom of the inclined main beam.

[0041] Finally, in this embodiment, the inner and outer templates are used to form an expanded cavity structure. During the pouring, the bottom of the expanded cavity has a larger load-bearing width and good stability. Therefore, there will not be too many other problems in the later pouring from bottom to top, and the pouring efficiency is high and the stability is good. At the same time, the width becomes wider from top to bottom, and the support force of the bottom is strong, which provides good support.

[0042] As shown in the accompanying drawings, from top to bottom, the inner template 110 includes a transition section 111, a diagonal brace section 112, a force section 113 and a bearing section 114 in sequence, and the transition section 111 is an arc section arranged away from the outer template 120. In this embodiment, since the width will increase later, it is necessary to fully consider the force, so compared with the straight line section, the arc section has better force, better tolerance, good diffusion, and can disperse the force outward. In actual use, a force section and a bearing section are added. The force section not only needs to accept the force during pouring, but also the downward force of the transition section and the diagonal brace, while the bearing section forms a bearing surface to carry the force section and disperse its force.

[0043] As shown in the accompanying drawings, the diagonal bracing section 112 and the force-bearing section 113 are both inclined surfaces, and the slope of the diagonal bracing section 112 is greater than the slope of the force-bearing section 113, and the length of the diagonal bracing section 112 is less than the length of the force-bearing section 113. In this embodiment, the diagonal bracing section is not only steep, but also long. This arrangement makes the casting cavity gradually widen at the top, rather than being very wide all at once, which can form a more ideal anti-collision wall, and the overall thickness is not very good, saving materials.

[0044] In order to connect the inner and outer formworks, a first tie screw 300 for connecting with the outer formwork 120 is provided on the bearing section 114, and the first tie screw 300 is arranged close to the existing building structure 200. The first tie screw is arranged in the bearing section, not only to ensure the stability of the existing building structure, but also to form the lowest bearing, providing a basis for stability in the later pouring.

[0045] In this embodiment, the outer template 120 includes an inclined section 121 connected to the inner template 110 and a hook section 122 supporting and abutting against the existing building structure 200, and the end of the hook section 122 forms an abutting portion abutting against the bottom of the structural building structure 200. Compared with the multi-segment setting, in this embodiment, the inclined section 121 is integrally formed, and cooperates with the hook section 122, so that the entire cantilever structure is more obvious, and at the same time, the hook abuts against the existing building structure to form a better support, and the inclined section provides a foundation for the subsequent expansion cavity, and is not segmented, so it has good stability and is easy to produce and process.

[0046] Compared with a single support, the present embodiment also includes a groove structure 400 connecting the existing building structure 200 and the outer formwork 120, the bottom of the groove structure 400 is in contact with the existing building structure 200, and the side of the existing building structure 200 is in contact with the side of the hook section 122 in the outer formwork 120. The muscle-enhancing groove further increases the fit, and various supports can be added to the bottom of the groove, providing a basis for further structural improvements in the future, and the groove, as a connector, improves the stability of the whole. At this time, the groove part is in contact with the outside of the hook, and in the vertical direction, it not only has support, but also has connection, so that the bottom of the existing building structure has more force points and increased strength.

[0047] As shown in the accompanying drawings, a second tension screw 500 is also included to connect the reinforcement 130 and the adjustment assembly 140, and the end of the diagonal brace 160 is arranged close to the second tension screw 500. When connected, the second tension screw 500 is not directly connected to the two templates, but is connected by the reinforcement and the adjustment assembly. On the one hand, the entire pouring can be fully poured without being blocked by the second tension screw. Secondly, the height of the pouring cavity can be adjusted by adjusting the position of the second tension screw. Finally, it can also form a force-bearing structure with the diagonal brace and the like to decompose the force.

[0048] In order to ensure the strength of the second tension screw and the matching assembly with the diagonal brace, a reinforcing plate 600 is also included, which is connected to the adjustment assembly 140 and the inner formwork 110 and is located on the sides of both. The diagonal brace 160 is connected to the second tension screw 500 through the reinforcing plate 600. The reinforcement plate is added so that the inner formwork is closer to the side of the diagonal brace, and the strength is greater. At this time, when the entire force is applied, there are more force points and decomposition points, which increases the strength of the side and provides a basis for further stability. Specifically, the projection of the reinforcement plate is located on the inner formwork, and its bottom is connected to any section of the inner formwork, such as it is connected to the diagonal brace section, forming a longer reinforcement structure, and also increasing the strength of the cast-in-place crash wall from the side.

[0049] Specifically, the connecting member 150 is an L-shaped structure, and a triangular ribbed plate 151 is arranged inside the L-shaped structure. The L-shaped structure is selected to form a frame assembly with the second tension screw and the adjustment assembly, and the entire structure has a certain degree of closure, which reduces interference with the outside world during construction, and at the same time forms a limiting cavity, which has a guiding and limiting effect on construction.

[0050] In this embodiment, the adjustment component 140 is a suspension rod, and the suspension rod is provided with a push assembly 141 near the L-shaped structure. The push assembly is provided to adjust the length of the suspension rod, so that different L-shaped structures can be matched and different construction requirements can be met.

[0051] Refer to the attached Figure 1-3 As shown, in this embodiment, the anti-collision wall formwork is a combined steel formwork, and the inner formwork 110 and the outer formwork 120 both include panels and various ribs. Specifically, the panel adopts δ=5mm steel plate, the transverse ribs adopt flat steel with a thickness of δ=5mm and a width of 80mm, with a spacing of 305mm; the middle vertical ribs adopt flat steel with a thickness of δ=10mm and a width of 80mm, with a spacing of 300mm; the formwork adopts 4 M16mm precision-rolled tie rods to form tie screws for pulling.

[0052] In actual use, load calculation is required, including the following:

[0053] 1. Loads generated by vibrating concrete

[0054] P1=4KN / m 2 , the effective range is within the effective pressure altitude.

[0055] 2. Horizontal dynamic load generated by pouring concrete

[0056] P2=2KN / m 2 The construction adopts hanging pot pouring.

[0057] 3. According to Formula D-1 and D-2 on page 309 of the Technical Specifications for Highway Bridge and Culvert Construction (JTJ 041-2000), calculate using the following two formulas and take the minimum value:

[0058]

[0059] According to Table 9.2.2 on page 66 of the Technical Specifications for Highway Bridge and Culvert Construction (JTJ 041-2000), the load combination is considered, with a vibration load of 4 kPa and a horizontal dynamic load of 2 kPa generated by pouring concrete.

[0060]

[0061] Where: γ—concrete bulk density, take γ=25kN / m 3 ;

[0062] t0—initial setting time of concrete, t0=200 / (T+15), T is 10℃.

[0063] β1—correction coefficient for the influence of admixtures. When no admixture is added, β1=1.0. When an admixture with a retarding effect is added, β1=1.2. In this embodiment, 1.0 is selected.

[0064] β2—Correction coefficient for concrete slump. When the slump is less than 3cm, take 0.85; when the slump is 5cm to 9cm, take 1.0; when the slump is 11cm to 15cm, take 1.15. Here we take 1.15.

[0065] V—concrete pouring speed (m / h), here it is taken as 1.0m / h.

[0066] H—The total height from the calculation position of concrete side pressure to the top surface of the newly poured concrete.

[0067] It indicates that at a pouring speed of 1m / h, the pressure on the formwork side increases linearly from 0 to 35.5kPa when the construction reaches the height of 1.18m of the crash wall. After calculation, it meets the requirements.

[0068] In this embodiment, the tension bolts are M18. The maximum area of ​​the tension rod arrangement is: 0.77m×0.84m.

[0069] In this embodiment, the outer formwork is reinforced by connecting one end of a 70cm long channel steel to the bottom of the inner formwork, and the other end cantilevering the outer formwork, and the middle is supported on the inner formwork 110. Each formwork (i.e. 1.25m) is provided with a channel steel to form the diagonal brace 160 in this embodiment.

[0070] The template in this embodiment is cast in the bridge construction section to form an anti-collision wall, which plays a good role in enhancing anti-collision.

[0071] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. The combined formwork of the cantilever anti-collision wall is characterized by: include, Internal formwork located on an existing building structure; An outer formwork connected to the inner formwork and abutting against the bottom of the existing building structure, wherein a reinforcement is provided on the top of the outer formwork, an adjustment component is connected to the reinforcement, and the adjustment component is connected to the top of the inner formwork by a connector; The top of the inner template is located at the bottom of the adjustment assembly and is provided with an oblique support away from the inner template; From top to bottom, an expanded cavity structure with gradually increasing width is formed between the inner template and the outer template.

2. The modular formwork of the cantilever anti-collision wall according to claim 1 is characterized in that: From top to bottom, the inner template includes a transition section, a diagonal support section, a force-bearing section and a load-bearing section in sequence, and the transition section is an arc section arranged away from the outer template.

3. The combined formwork of the cantilever anti-collision wall according to claim 2 is characterized in that: The oblique support section and the force-bearing section are both inclined surfaces, and the slope of the oblique support section is greater than the slope of the force-bearing section, and the length of the oblique support section is less than the length of the force-bearing section.

4. The combined formwork of the cantilever anti-collision wall according to claim 2 is characterized in that: A first pair of tie screws for connecting with the outer formwork is provided on the bearing section, and the first pair of tie screws is arranged close to the existing building structure.

5. The modular formwork of the cantilever anti-collision wall according to claim 1 is characterized in that: The outer template includes an inclined section connected to the inner template and a hook section supporting and abutting against the existing building structure. The end of the hook section forms an abutting portion abutting against the bottom of the building structure.

6. The modular formwork of the cantilever crash barrier according to claim 5, characterized in that: It also includes a groove structure connecting the existing building structure and the external template, the bottom of the groove structure fits with the existing building structure, and the side of the existing building structure fits with the side of the hook section in the external template.

7. The modular formwork of the cantilever anti-collision wall according to claim 1, characterized in that: It also includes a second tension screw rod connected between the reinforcement member and the adjustment assembly, and the end of the diagonal support is arranged close to the second tension screw rod.

8. The modular formwork of the cantilever anti-collision wall according to claim 7, characterized in that: It also includes a reinforcing plate that connects the adjustment assembly and the inner template and is located on the sides of both, and the diagonal brace is connected to the second tension screw rod through the reinforcing plate.

9. The modular formwork of the cantilever anti-collision wall according to claim 1, characterized in that: The connecting piece is an L-shaped structure, and a triangular ribbed plate is arranged inside the L-shaped structure.

10. The modular formwork of the cantilever crash barrier according to claim 9, characterized in that: The adjusting component is a suspension rod, and a pushing component is arranged on the suspension rod near the L-shaped structure.

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