Prefabricated anti-collision device that can be quickly dry-installed and its installation method

Abstract

The present invention discloses a prefabricated anti-collision device that can be quickly and dry-installed and its installation method. The anti-collision device includes an anti-collision wall. At the bottom of the outer side of the anti-collision wall, a number of convex shear-resistant tooth blocks are provided, and at the bottom of the inner side, a convex insertion rod is connected; at the bottom of the anti-collision wall, an installation foundation is provided, and at the position corresponding to each of the convex shear-resistant tooth blocks, a concave shear-resistant tooth groove is respectively provided. The installation method includes pouring the installation foundation, reserving the concave shear-resistant tooth groove and pre-embedding a concave locking groove during pouring, and connecting the concave locking groove and the second pre-embedded steel bar by thread; binding the steel reinforcement cage of the anti-collision wall, and arranging convex shear-resistant tooth blocks at the positions corresponding to the concave shear-resistant tooth grooves and arranging convex insertion rods at the positions corresponding to the concave locking grooves; connecting the convex insertion rods and the first reserved steel bars of the anti-collision wall by thread. The anti-collision wall of the present invention only needs to be dry-connected, has high structural stability, avoids on-site pouring of concrete, has high installation efficiency, and thus improves the overall construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of crash barriers, and particularly to a prefabricated crash prevention device that can be quickly and dry-installed and an installation method thereof. Background Art

[0002] A crash barrier is a device commonly installed on roads and urban viaducts. Especially for bridge structures, a crash barrier is essential. The function of a crash barrier is to prevent a vehicle from falling off the bridge deck or road surface after a traffic accident, thereby avoiding losses to people's lives and property. Therefore, the structural design of a crash barrier needs to withstand the impact of a vehicle.

[0003] Currently, most crash barriers adopt a concrete structure type, and the construction is mainly by on-site casting. For on-site cast crash barriers, the required construction period is relatively long, and formwork needs to be erected on-site, which is not a green and environmentally friendly construction method.

[0004] With the development of industrialized assembly technology, prefabricated and assembled construction of crash barriers has also emerged. There are mainly two methods.

[0005] The first method: The crash barrier and the main girder are prefabricated together for hoisting. The problem with this method is that after the crash barrier and the main girder are prefabricated together, it brings many problems to transportation and hoisting. Usually, the main girder is a symmetric and regular structure, and transportation and hoisting are relatively convenient. However, with a crash barrier on one side, it brings great difficulties to transportation and hoisting. During transportation, additional temporary supports are required, and during hoisting, the torsion and inclination of the main girder with the crash barrier need to be considered; moreover, with the crash barrier, the weight of transportation and hoisting is increased. In addition, the method of prefabricating the crash barrier and the main girder together is only applicable to new structures and is not suitable for replacing the crash barrier.

[0006] The second method: The crash barrier is prefabricated in sections and connected to the main girder on-site in the form of a wet joint. This connection method is often used in combination with ultra-high performance concrete. Utilizing the excellent bond performance of ultra-high performance concrete to steel bars, the length of the reserved steel bars in the prefabricated crash barrier and the main girder is greatly reduced. Although the performance of ultra-high performance concrete is used to reduce the length of the reserved steel bars, due to the limitation of the size of the crash barrier, the space left for the wet joint is limited, making it difficult to meet the requirements for bonding the steel bars, resulting in a lower structural reliability; moreover, compared with ordinary concrete, ultra-high performance concrete has a darker appearance color, and there will be an obvious post-cast strip left after construction, affecting the appearance. In addition, there is still a certain amount of casting on-site, so the construction requires a certain amount of time.

[0007] Therefore, how to improve the connection strength and installation efficiency of the crash barrier structure to improve the structural reliability and overall construction efficiency of the crash barrier is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0008] In view of the above defects of the prior art, the technical object of the present invention is to improve the connection strength and installation efficiency of the anti-collision wall structure, so as to improve the structural reliability and overall construction efficiency of the anti-collision wall.

[0009] To achieve the above technical object, the present invention provides a prefabricated anti-collision device that can be quickly and dry-installed, including an anti-collision wall. A plurality of convex shear-resistant teeth are provided at the bottom of the outer side of the anti-collision wall, and a convex insertion rod is connected to the bottom of the inner side.

[0010] An installation foundation is provided at the bottom of the anti-collision wall. Concave shear-resistant tooth grooves are respectively provided at the positions corresponding to each of the convex shear-resistant teeth, and each convex shear-resistant tooth is correspondingly installed in one of the concave shear-resistant tooth grooves; a concave locking groove is provided at the position corresponding to the concave insertion rod on the installation foundation, and the convex insertion rod is in a locked state after being installed in the concave locking groove.

[0011] Preferably, the convex insertion rod is threadedly connected to the first embedded steel bar in the anti-collision wall, and the concave locking groove is threadedly connected to the second embedded steel bar in the installation foundation.

[0012] Preferably, a locking block is provided in the concave locking groove, and the locking block is fixedly connected to the inner wall of the concave locking groove through a spring.

[0013] The plug of the convex insertion rod is wedge-shaped, and a card slot is provided at the top position of the plug of the convex insertion rod.

[0014] During the process of inserting the convex insertion rod into the concave locking groove, the plug of the convex insertion rod presses the locking block, causing the spring to shorten; when the positions of the card slot and the locking block correspond to each other, the locking block pops out under the action of the spring tension and is snapped into the card slot, realizing the locking of the convex insertion rod in the concave locking groove.

[0015] Preferably, an isolation layer is provided on the outer periphery of the convex insertion rod for isolating the contact between the convex insertion rod and the anti-collision wall.

[0016] Preferably, an adjustment layer is provided on the top of the installation foundation.

[0017] The present invention also provides an installation method for the above prefabricated anti-collision device that can be quickly and dry-installed, including the following steps:

[0018] Step 1: Pour the installation foundation. When pouring, reserve the concave shear-resistant tooth grooves and embed the concave locking grooves, and threadedly connect the concave locking grooves with the second embedded steel bars.

[0019] Step 2: Tie up the steel cage of the anti-collision wall, and set a convex anti-shear tooth block corresponding to the position of the concave anti-shear tooth groove, and set a convex plug rod corresponding to the position of the concave lock groove; thread the convex plug rod to the first reserved steel bar of the anti-collision wall; set an isolation layer around the convex plug rod;

[0020] Step 3: Set up formwork and cast the anti-collision wall segments. When the strength of the prefabricated anti-collision wall reaches the maintenance requirements, transport it to the site for installation;

[0021] Step 4: Lay the adjustment layer on the installation foundation to achieve close contact between the anti-collision wall and the installation foundation;

[0022] Step 5: Align the convex anti-shear tooth block of the anti-collision wall with the concave anti-shear tooth groove, so that the convex anti-shear tooth block is installed in the corresponding concave anti-shear tooth groove. At this time, the convex plug rod can be inserted into the concave locking groove, so that the convex plug rod is locked in the concave locking groove;

[0023] Step 6. Finally, construct the paving structure on the installation foundation.

[0024] Preferably, the step of locking the convex insertion rod in the concave locking groove in step five includes:

[0025] First, rotate and adjust the convex plug rod to extend so that the locking block is inserted into the slot to lock the convex plug rod;

[0026] Then, the convex rod is adjusted to shorten by reverse rotation, so that the locking block is tightened and the initial deformation of the locking block is eliminated.

[0027] Preferably, the adjustment layer in step 4 is composed of mortar material.

[0028] Preferably, after the step 5 is completed, additional grouting is performed on the adjustment layer to make the space between the anti-collision wall and the installation foundation compact.

[0029] Beneficial effects of the present invention:

[0030] The prefabricated anti-collision device of the present invention, which can be quickly and dry-installed, can resist the shear force borne by the anti-collision wall by using the cooperation of convex anti-shear tooth blocks and concave anti-shear tooth grooves; and can resist the overturning moment borne by the anti-collision wall by using the cooperation of convex plug rods and concave locking grooves; thereby improving the structural stability of the anti-collision wall and ensuring the reliability of the anti-collision wall.

[0031] The installation method of the prefabricated anti-collision device that can be quickly and dry-installed of the present invention can prefabricate or embed convex shear-resistant tooth blocks, concave shear-resistant tooth grooves, convex plug rods and concave locking grooves in advance when the anti-collision wall is installed. Only dry connection is required, avoiding on-site pouring of concrete, and the installation efficiency is high, thereby improving the overall construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1It is a schematic structural diagram of the anti-collision wall part of the prefabricated anti-collision device that can be quickly and dry-installed according to the present invention;

[0033] Figure 2 It is a structural schematic diagram of the installation foundation part of the prefabricated anti-collision device that can be quickly and dry-installed according to the present invention;

[0034] Figure 3 It is a schematic diagram of the overall structure of the prefabricated anti-collision device that can be quickly and dry-installed according to the present invention;

[0035] Figure 4 It is a structural schematic diagram of the locking state of the convex plug rod and the concave lock groove in the prefabricated anti-collision device that can be quickly and dry-installed according to the present invention;

[0036] Figure 5 It is a structural schematic diagram of the convex plug rod and the concave lock groove in the prefabricated anti-collision device that can be quickly and dry-installed according to the present invention in a separated state;

[0037] Figure 6 It is a schematic diagram of the force analysis of the anti-collision wall of the present invention.

[0038] In the figure: 1 anti-collision wall, 2 convex anti-shear tooth block, 3 first embedded steel bar, 4 convex plug rod, 5 isolation layer, 6 installation foundation, 7 concave anti-shear tooth groove, 8 second embedded steel bar, 9 concave locking groove, 10 card groove, 11 spring, 12 locking block, 13 adjustment layer, 14 paving structure. DETAILED DESCRIPTION

[0039] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0040] Example:

[0041] like Figures 1-6 As shown, a prefabricated anti-collision device that can be quickly dry-installed includes an anti-collision wall 1, and the bottom of the outer side of the anti-collision wall 1 is provided with a plurality of convex anti-shear tooth blocks 2, and the plurality of convex anti-shear tooth blocks 2 can be arranged continuously or intermittently; the bottom of the inner side of the anti-collision wall 1 is connected with a convex plug rod 4;

[0042] An installation base 6 is provided at the bottom of the anti-collision wall 1, and a concave anti-shear tooth groove 7 is provided at the position of each convex anti-shear tooth block 2 on the installation base 6, and each convex anti-shear tooth block 2 is installed in a concave anti-shear tooth groove 7; a concave locking groove 9 is provided at the position of the installation base 6 corresponding to the concave plug rod 4, and the convex plug rod 4 enters a locked state after being installed in the concave locking groove 9.

[0043] The convex insertion rod 4 is threadedly connected to the first embedded steel bar 3 in the anti-collision wall 1, and the concave locking groove 9 is threadedly connected to the second embedded steel bar 8 in the installation foundation 6. The diameters of the first embedded steel bar 3 and the second embedded steel bar 8 are determined according to structural calculations and can be 16 mm - 40 mm.

[0044] A locking block 12 is arranged in the concave locking groove 9, and the locking block 12 is fixedly connected to the inner wall of the concave locking groove 9 through a spring 11;

[0045] As Figure 4 、 Figure 5 shown, the plug shape of the convex insertion rod 4 is wedge-shaped, and a card slot 10 is arranged at the top position of the plug of the convex insertion rod 4;

[0046] During the process of inserting the convex insertion rod 4 into the concave locking groove 9, the plug of the convex insertion rod 4 presses the locking block 12, causing the spring 11 to shorten; when the positions of the card slot 10 and the locking block 12 correspond to each other, the locking block 12 pops out under the tension of the spring 11 and is clamped into the card slot 10, realizing the locking of the convex insertion rod 4 in the concave locking groove 9; when the convex insertion rod 4 rotates clockwise, it elongates, and when it rotates counterclockwise, it shortens; this function can be used to adjust the extended length of the convex insertion rod 4 to better adapt to the connection.

[0047] An isolation layer 5 is arranged on the outer periphery of the convex insertion rod 4 to isolate the contact between the convex insertion rod 4 and the anti-collision wall 1, so that the convex insertion rod 4 can rotate, thereby realizing the elongation or shortening of the convex insertion rod 4 relative to the anti-collision wall 1.

[0048] An adjustment layer 13 is arranged on the top of the installation foundation 6.

[0049] As Figure 6 shown, the principle of the present invention is that: under the impact force F of the vehicle, the anti-collision wall 1 will be subjected to a shear force Q and an overturning moment M. The connection between the anti-collision wall 1 and the installation foundation 6 needs to be able to resist the shear force Q and the overturning moment M. Therefore, the present invention provides convex shear-resistant tooth blocks 2 and concave shear-resistant tooth grooves 7 to resist the shear force Q. At the same time, the inner side of the anti-collision wall 1 and the installation foundation 6 are matched through the convex insertion rod 4 and the concave locking groove 9 to resist the overturning moment M.

[0050] The installation method of the above-mentioned prefabricated anti-collision device that can be quickly and dry-installed specifically includes the following steps:

[0051] Step 1: Pour the installation foundation 6. When pouring, reserve the concave shear-resistant tooth groove 7 and embed the concave locking groove 9, and threadedly connect the concave locking groove 9 with the second embedded steel bar 8;

[0052] Step 2: Tie up the steel cage of the anti-collision wall 1, and set the convex anti-shear tooth block 2 corresponding to the position of the concave anti-shear tooth groove 7, and set the convex plug rod 4 corresponding to the position of the concave lock groove 9; thread the convex plug rod 4 and the first reserved steel bar 3 of the anti-collision wall 1; set an isolation layer 5 on the outer periphery of the convex plug rod 4;

[0053] Step 3: Set up the formwork and cast the anti-collision wall 1 segment. When the strength of the prefabricated anti-collision wall 1 reaches the maintenance requirements, transport it to the site for installation;

[0054] Step 4: laying an adjustment layer 13 on the installation base 6 to adjust the unevenness between the prefabricated anti-collision wall 1 and the installation base 6 to achieve close contact between the anti-collision wall 1 and the installation base 6;

[0055] Step 5: Align the convex anti-shear tooth block 2 of the anti-collision wall 1 with the concave anti-shear tooth groove 7, so that the convex anti-shear tooth block 2 is installed in the corresponding concave anti-shear tooth groove 7. At this time, the convex plug rod 4 can be inserted into the concave locking groove 9, so that the convex plug rod 4 is locked in the concave locking groove 9;

[0056] Step 6: Finally, construct the paving structure 14 on the installation foundation 6;

[0057] The step of locking the convex insertion rod 4 in the concave locking groove 9 in step 5 includes:

[0058] First, the convex rod 4 is rotated to extend so that the locking block 12 is inserted into the slot 10 to lock the convex rod 4;

[0059] Then, the convex insertion rod 4 is rotated in the reverse direction to shorten, thereby tightening the locking block 12 and eliminating the initial deformation of the locking block 12 .

[0060] In step 4, the adjustment layer 13 is composed of mortar material.

[0061] After step five is completed, additional grouting is performed on the adjustment layer 13 to make the space between the anti-collision wall 1 and the installation foundation 6 compact.

[0062] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A prefabricated anti-collision device that can be quickly dry-installed, including an anti-collision wall, characterized in that: For the described crash barrier, a number of convex shear-resistant tooth blocks are provided at the outer bottom, and convex insertion rods are connected to the inner bottom; An installation foundation is provided at the bottom of the crash barrier. Concave shear-resistant tooth grooves are respectively provided at the positions of the installation foundation corresponding to each convex shear-resistant tooth block, and each convex shear-resistant tooth block is correspondingly installed in one concave shear-resistant tooth groove; a concave locking groove is provided at the position of the installation foundation corresponding to the concave insertion rod. After the convex insertion rod is installed in the concave locking groove, it enters a locked state; The convex insertion rod is threadedly connected to the first embedded steel bar in the crash barrier, and the concave locking groove is threadedly connected to the second embedded steel bar in the installation foundation; A locking block is provided in the concave locking groove, and the locking block is fixedly connected to the inner wall of the concave locking groove through a spring; The plug of the convex insertion rod is wedge-shaped, and a card slot is provided at the top position of the plug of the convex insertion rod; During the process of inserting the convex insertion rod into the concave locking groove, the plug of the convex insertion rod presses the locking block, causing the spring to shorten; when the positions of the card slot and the locking block correspond to each other, the locking block pops out under the action of the spring tension and is stuck into the card slot, realizing the locking of the convex insertion rod in the concave locking groove; An isolation layer is provided on the outer circumference of the convex insertion rod for isolating the contact between the convex insertion rod and the crash barrier.

2. The prefabricated anti-collision device capable of quick dry installation according to claim 1, wherein: An adjustment layer is provided on the top of the installation foundation.

3. The installation method of the prefabricated anti-collision device capable of rapid dry installation according to claim 1, characterized in that: It includes the following steps: Step 1: Pour the installation foundation. When pouring, reserve concave shear-resistant tooth grooves and embed concave locking grooves, and threadedly connect the concave locking grooves with the second embedded steel bars; Step 2: Bind the steel reinforcement cage of the crash barrier, and set convex shear-resistant tooth blocks at the positions corresponding to the concave shear-resistant tooth grooves, and set convex insertion rods at the positions corresponding to the concave locking grooves; threadedly connect the convex insertion rods with the first reserved steel bars of the crash barrier; set an isolation layer on the outer circumference of the convex insertion rods; Step 3: Set up formwork to pour the crash barrier section. Wait until the strength of the precast crash barrier reaches the maintenance requirement, transport it to the site for installation; Step 4: Lay an adjustment layer on the installation foundation to achieve close contact between the crash barrier and the installation foundation; Step 5: Align the convex shear-resistant tooth blocks of the crash barrier with the positions of the concave shear-resistant tooth grooves and place them, so that the convex shear-resistant tooth blocks are installed in the corresponding concave shear-resistant tooth grooves. At this time, the convex insertion rods can just be inserted into the concave locking grooves, and the convex insertion rods are locked in the concave locking grooves; Step 6: Finally, construct the paving structure on the installation foundation.

4. The installation method of the prefabricated anti-collision device that can be quickly and dry-installed according to claim 3, characterized in that: The steps in Step 5 to lock the convex insertion rod in the concave locking groove include: First, rotate and adjust the convex insertion rod to extend, so that the locking block is stuck into the card slot to realize the locking of the convex insertion rod; Then, rotate the convex insertion rod in the reverse direction to shorten it, so that the locking block is tightened to eliminate the initial deformation of the locking block.

5. The installation method of the prefabricated anti-collision device capable of quick dry installation according to claim 3, characterized in that: The adjustment layer in Step 4 is composed of mortar materials.

6. The installation method of the prefabricated anti-collision device capable of quick dry installation according to claim 5, characterized in that: After Step 5 is completed, supplementary grouting is carried out on the adjustment layer to make the crash barrier and the installation foundation dense.

Images