Fabricated pavement capable of being rapidly repaired

Abstract

The utility model relates to the technical field of assembly type pavements, and discloses an assembly type pavement capable of being quickly repaired, which comprises longitudinal H-shaped steel and a first plate arranged on one side of the longitudinal H-shaped steel, and further comprises a second plate arranged on one side of the longitudinal H-shaped steel on the other side of the longitudinal H-shaped steel, and transverse H-shaped steel is fixedly connected to the bottoms of the first plate and the second plate; under the matching action of the longitudinal H-shaped steel, the fixed seat, the transverse H-shaped steel, the clamping shell and the clamping mechanism, the first plate and the second plate can be quickly limited and released, the time needed for replacing the damaged plate is shortened, and therefore the effect of quickly repairing the damaged road surface can be achieved; according to the assembly type road surface, the threaded holes can be shielded and protected, the situation that the threaded holes are blocked by sundries such as dust and rainwater is relieved, and the problems that in the using process of an existing assembly type road surface, plates are not convenient to disassemble and fix, and the hoisted threaded holes cannot be protected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled pavement, in particular to an assembled pavement that can be repaired quickly. Background Art

[0002] Prefabricated pavements are made of prefabricated modular panels that are pre-manufactured in factories and assembled on construction sites. Prefabricated pavements are widely used in roads with relatively light traffic loads and relatively small loads, such as pedestrian walkways or temporary designed pavements and other traffic areas.

[0003] When a prefabricated pavement is partially damaged, the damaged panels need to be replaced in time. However, most of the current prefabricated pavements are connected by relatively complicated and cumbersome methods such as bolt lap, welding, and grouting, which makes it extremely inconvenient to dismantle, replace or reinstall the damaged panels. The time-consuming cost is high, and the inconvenience of traffic interruption is increased.

[0004] At the same time, when replacing and repairing damaged panels, it is usually necessary to use lifting equipment to connect the threaded lifting rings to the threaded holes on the panels to achieve lifting operations. However, some existing prefabricated pavement panels cannot provide effective protection for their threaded holes, resulting in the threaded holes on the panels being easily blocked or even damaged by dust, rainwater and other debris. Construction workers are required to take additional cleaning steps for the threaded holes or use other alternative connection methods to complete the lifting of the panels, which will increase the cost and resource investment of the repair, making the repair and replacement process of prefabricated pavements more complicated. Utility Model Content

[0005] The purpose of the utility model is to provide a quickly repairable assembled pavement to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a prefabricated pavement that can be quickly repaired, comprising a longitudinal H-shaped steel and a first plate arranged on one side thereof, and also comprising: a second plate arranged on one side of the longitudinal H-shaped steel on the other side, the bottoms of the first plate and the second plate are fixedly connected with a transverse H-shaped steel, the bottoms of the transverse H-shaped steel and the longitudinal H-shaped steel are fixedly connected with a plug rod, and the three sides of the first plate and the second plate are provided with mutually staggered grooves; a fixing seat fixedly connected to one side of the longitudinal H-shaped steel, the top of the longitudinal H-shaped steel is provided with a clamping shell, the inner wall of the fixing seat is provided with a clamping mechanism, the tops of the first plate and the second plate are provided with threaded holes, a closing mechanism is installed above the inner cavity of the threaded hole, and both ends of the longitudinal H-shaped steel are provided with bolting holes.

[0007] Preferably, the clamping mechanism includes a first vertical groove opened on one side of the fixing seat and a lower cutting groove opened on one side of the lower wing plate of the transverse H-shaped steel, and also includes an opening groove opened on the top of the longitudinal H-shaped steel and clamping grooves opened on both sides of the clamping shell, and also includes an upper cutting groove opened on one side of the upper wing plate of the transverse H-shaped steel and a second vertical groove opened on the other side of the clamping shell, and an auxiliary component is provided on one side of the clamping shell.

[0008] Preferably, the auxiliary component includes an L-shaped rod slidably connected to the inner wall of the snap-on shell and a magnet installed on the horizontal end of the L-shaped rod, and also includes a hidden groove opened on one side of the snap-on shell.

[0009] Preferably, the closing mechanism includes a sealing plug clamped on the upper part of the inner cavity of the threaded hole and an annular groove opened on the upper part of the inner cavity of the threaded hole, and also includes a convex ring fixedly connected to the surface of the sealing plug and a dial hole opened on the top of the sealing plug, and an anti-loss component is provided on one side of the annular groove.

[0010] Preferably, the anti-loss component includes a storage cavity opened on one side of the inner wall of the annular groove and a rubber belt slidably connected to the inner cavity of the storage cavity, and also includes a clamping block fixedly connected to the other end of the rubber belt.

[0011] Preferably, one side of each of the first plate and the second plate is fixedly connected with a water guide plate, and the web of the longitudinal H-shaped steel is provided with a drainage hole.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model can quickly limit and release the limit of the first plate and the second plate through the cooperation of the longitudinal H-shaped steel, the fixing seat, the transverse H-shaped steel, the clamping shell and the clamping mechanism, thereby simplifying the steps and time required for replacing the damaged plates, thereby achieving the effect of quickly repairing the damaged road surface. At the same time, through the setting of the closing mechanism, the threaded holes can be shielded and protected to reduce the clogging of the threaded holes by debris such as dust and rainwater, so that the threaded lifting rings can be installed normally, and the damaged plates can be lifted and replaced smoothly. Therefore, the efficiency of repairing the assembled road surface can be improved, and the problem that the assembled road surface is currently not convenient to disassemble and fix the plates during use and the threaded holes for lifting cannot be protected can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of a partial three-dimensional cross-sectional structure in the utility model;

[0016] Figure 3 It is a schematic diagram of a partial three-dimensional cross-section structure of the present utility model;

[0017] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 5 It is a schematic diagram of a partial three-dimensional cross-section structure developed from another viewing angle in the utility model;

[0019] Figure 6 It is a schematic diagram of a partial three-dimensional cross-sectional structure from another viewing angle of the utility model;

[0020] Figure 7 For this utility model Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0021] In the figure: 1. longitudinal H-shaped steel; 2. first plate; 3. second plate; 4. transverse H-shaped steel; 5. fixing seat; 6. snap-on shell; 7. snap-on mechanism; 71. first vertical groove; 72. lower groove; 73. opening groove; 74. snap-on groove; 75. upper groove; 76. second vertical groove; 77. auxiliary component; 771. L-shaped rod; 772. magnet; 773. hidden groove; 8. threaded hole; 9. closing mechanism; 91. sealing plug; 92. convex ring; 93. annular groove; 94. dial hole; 95. anti-lost component; 951. storage cavity; 952. rubber belt; 953. clamping block; 10. clamping groove; 11. water guide plate; 12. drainage hole; 13. plug rod; 14. bolting hole. DETAILED DESCRIPTION

[0022] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.

[0023] See also Figure 1-7As shown, a quickly repairable assembled pavement includes two longitudinal H-shaped steels 1, which are distributed in parallel. During installation, the bottom of the longitudinal H-shaped steels 1 is fitted with a flat foundation, and the two longitudinal H-shaped steels 1 are connected to the shoulders on both sides of the road. A first plate 2 is provided on one side of the longitudinal H-shaped steel 1, and a second plate 3 is provided on one side of the longitudinal H-shaped steel 1 on the other side. The bottoms of the first plate 2 and the second plate 3 are fixedly connected with transverse H-shaped steels 4. The number of transverse H-shaped steels 4 is several and they are evenly distributed. The bottoms of the transverse H-shaped steels 4 are fitted with the foundation. The materials of the first plate 2 and the second plate 3 are both made of concrete and a steel frame structure, and the transverse H-shaped steel 4 is connected to the steel frame inside them, so that the transverse H-shaped steel 4 can have The first plate 2 and the second plate 3 are provided with mutually staggered card slots 10 on the three sides. The card slots 10 interlocked with each other on the three sides can not only make the first plate 2 and the second plate 3 firmly combined in the horizontal direction, effectively prevent the relative movement between them, but also can be effectively connected with the first plate 2 and the second plate 3 extending from their two ends through the card slots 10. The two places on one side of the longitudinal H-shaped steel 1 are fixedly connected with the fixing seat 5. 1 is two, so the number of fixing seats 5 is four, and they are symmetrical to each other. A clamping shell 6 is provided at two places on the top of the longitudinal H-shaped steel 1. The number and position of the clamping shell 6 and the fixing seat 5 correspond to each other. A clamping mechanism 7 is provided on the inner wall of the fixing seat 5. The clamping mechanism 7 is used in conjunction with the transverse H-shaped steel 4, the clamping shell 6 and the longitudinal H-shaped steel 1 to limit and release the first plate 2 and the second plate 3, so as to facilitate the staff to quickly remove and replace the damaged first plate 2 or the second plate 3, thereby achieving the purpose of quickly repairing the assembled pavement and reducing the maintenance time and the impact of traffic interruption. Threaded holes 8 are provided on the tops of the first plate 2 and the second plate 3. The number of threaded holes 8 is four, and they are respectively located at the first At the top four corners of the plate 2 or the second plate 3, threaded sections are arranged below the inner cavity of the threaded hole 8, and the threaded sections of the threaded hole 8 can be used to install a threaded lifting ring, through which the first plate 2 or the second plate 3 can be lifted, and a closing mechanism 9 is installed above the inner cavity of the threaded hole 8, and the closing mechanism 9 can block or open the top of the threaded hole 8, and can effectively prevent dust, rainwater and other debris from entering the threaded hole 8 and causing blockage during use, so as to ensure that the threaded hole 8 can always be kept clean and usable when the first plate 2 and the second plate 3 are lifted and replaced, and the first plate 2 and the second plate 3 are fixedly connected with a water guide plate 11 on the side close to the longitudinal H-shaped steel 1, and one side of the water guide plate 11 extends to the outside of the longitudinal H-shaped steel 1,When it rains, rainwater on the top of the first plate 2 and the second plate 3 will flow from their edges along the slope of the water guide plate 11 to the outside of the longitudinal H-shaped steel 1, thereby reducing the scouring and damage caused by rainwater to the roadbed below the longitudinal H-shaped steel 1. Drain holes 12 are opened on the web of the longitudinal H-shaped steel 1. The number of drainage holes 12 is several and evenly distributed. During installation, the drainage holes 12 are connected to the drainage system of the shoulder to divert rainwater flowing from the gap of the slot 10, which can reduce the risk of corrosion and damage caused by the longitudinal H-shaped steel 1 and the transverse H-shaped steel 4 being soaked in water for a long time, and can also reduce the settlement and deformation problems caused by the long-term erosion of the roadbed by accumulated water. Bolting holes 14 are opened at both ends of the longitudinal H-shaped steel 1. Through the bolting holes 14 at both ends of the longitudinal H-shaped steel 1, it can be stably connected to other longitudinal H-shaped steels 1, so as to achieve the purpose of extending the assembled road.

[0024] The clamping mechanism 7 includes a first vertical slot 71, which is located on one side of the fixing seat 5. The first vertical slot 71 matches the wall thickness of the web of the horizontal H-shaped steel 4. A lower cut groove 72 is provided on one side of the lower wing plate of the horizontal H-shaped steel 4. The lower cut groove 72 matches the wall thickness of the fixing seat 5. The lower cut groove 72 corresponds to the position of the first vertical slot 71 and is slidably connected. By clamping the lower cut groove 72 into the inner wall of the first vertical slot 71, the horizontal H-shaped steel 4 and the fixing seat 5 can be contacted and formed to achieve the effect of clamping each other, so that the horizontal H-shaped steel 4 can be limited in the horizontal direction, thereby achieving the purpose of initially limiting and fixing the first plate 2 and the second plate 3. The vertical H-shaped steel 1 top An opening groove 73 is opened on the top, and the opening groove 73 matches the wall thickness of the snap-on shell 6. There are two opening grooves 73, and the distance between the opening grooves 73 corresponds to the width of the snap-on shell 6. Both sides of the snap-on shell 6 are provided with snap-on grooves 74, and the snap-on grooves 74 match the thickness of the web of the longitudinal H-shaped steel 1. The snap-on grooves 74 correspond to the positions of the opening grooves 73 and are slidably connected. An upper groove 75 is opened on one side of the upper wing plate of the transverse H-shaped steel 4, and the upper groove 75 matches the wall thickness of the snap-on shell 6. A second vertical groove 76 is opened on the other side of the snap-on shell 6, and the second vertical groove 76 corresponds to the position of the upper groove 75. The second vertical groove 76 is connected to the web of the transverse H-shaped steel 4. The position and wall thickness of the second vertical groove 76 are matched, and the upper groove 75 is slidably connected. When the snap-in groove 74 is inserted into the open groove 73, the snap-in shell 6 and the longitudinal H-shaped steel 1 can be snapped. At this time, the second vertical groove 76 will also be correspondingly snapped into the inner wall of the upper groove 75, so that the snap-in shell 6, the longitudinal H-shaped steel 1 and the longitudinal H-shaped steel 1 and the fixing seat 5 can form a mutually snap-in structure, which can further enhance the limiting effect on the horizontal H-shaped steel 4, thereby ensuring that the first plate 2 and the second plate 3 on the top thereof can form a stable and reliable road surface for passage. When the snap-in shell 6 is removed, the damaged first plate 8 can be fixed through the threaded hole 8. 2 or the second plate 3 is hoisted and replaced. Compared with the complex and cumbersome connection methods such as bolt overlap or grouting used in traditional prefabricated pavements, it simplifies the time required for installing and disassembling the prefabricated pavement, and can achieve the purpose of quickly replacing and repairing the prefabricated pavement, thereby improving the efficiency of pavement repair. An auxiliary component 77 is provided on one side of the clamping shell 6. The auxiliary component 77 is used in conjunction with the longitudinal H-shaped steel 1. It can limit and fix the clamping shell 6 and the longitudinal H-shaped steel 1 when the clamping shell 6 is clamped with the longitudinal H-shaped steel 1, thereby preventing it from accidentally sliding, thereby further improving the stability and reliability of the clamping of the clamping shell 6 to the longitudinal H-shaped steel 1 and the transverse H-shaped steel 4.

[0025] The auxiliary component 77 includes an L-shaped rod 771, which is located on one side of the snap-on shell 6. The horizontal end of the L-shaped rod 771 passes through the inner cavity of the snap-on shell 6 and is slidably connected to its inner wall. When the snap-on shell 6 and the longitudinal H-shaped steel 1 are in a snap-on position, the L-shaped rod 771 can be moved so that the top of its horizontal end abuts against the bottom of the upper wing plate of the longitudinal H-shaped steel 1, thereby preventing the snap-on shell 6 from accidentally moving upward. A magnet 772 is installed at the horizontal end of the L-shaped rod 771. When the magnet 772 and the longitudinal H-shaped steel 1 are close to each other, a magnetic force of attraction is generated, which can make the abutment state between the horizontal end of the L-shaped rod 771 and the upper wing plate of the longitudinal H-shaped steel 1 more stable and reliable, and will not easily fall off. A hidden Hidden groove 773, the position of hidden groove 773 corresponds to that of L-shaped rod 771, the length of the vertical end of L-shaped rod 771 is greater than the length of hidden groove 773, when magnet 772 and longitudinal H-shaped steel 1 are attracted by magnetic force, at this time, the vertical side of L-shaped rod 771 is embedded in the interior of hidden groove 773, which can achieve a certain storage and hiding effect, thereby reducing the situation where accidental contact interference causes it to slide, and by moving the bottom end of L-shaped rod 771, it can be taken out of hidden groove 773, at this time, the staff can hold the vertical end of L-shaped rod 771, and pull it to separate the magnet 772 and longitudinal H-shaped steel 1 from the magnetic attraction, and the limiting effect between snap-on shell 6 and longitudinal H-shaped steel 1 can be quickly released.

[0026] The sealing mechanism 9 includes a sealing plug 91, which is located above the inner cavity of the threaded hole 8. The upper part of the inner wall of the threaded hole 8 is of conical design. The diameter of the sealing plug 91 corresponds to the diameter of the top of the threaded hole 8. An annular groove 93 is provided above the inner cavity of the threaded hole 8. A convex ring 92 is fixedly connected to the surface of the sealing plug 91. The position and shape of the convex ring 92 and the annular groove 93 are adapted and used in conjunction with each other. The materials of the sealing plug 91 and the convex ring 92 are both rubber materials with good weather resistance and elasticity. When the sealing plug 91 is inserted above the inner cavity of the threaded hole 8, the sealing plug 91 will produce a certain elastic deformation due to its own elasticity, which can increase its fitting effect with the inner wall of the threaded hole 8. Then, the convex ring 92 is inserted into the inner wall of the annular groove 93, so that the sealing plug 91 is flush with the top of the threaded hole 8, which can effectively provide a better sealing effect for the threaded hole 8. During the long-term use of the first plate 2 or the second plate 3, it can effectively prevent dust, rainwater and other debris from entering the threaded hole 8 and causing blockage, contamination or even damage. A dial hole 94 is provided on the top of the sealing plug 91. When it is necessary to hoist the first plate 2 or the second plate 3, the staff can insert the dial hole 94 into the inside of the dial hole 94 to conveniently pull the sealing plug 91 upward, so that the complete and clean threaded hole 8 can be exposed, so that it can be smoothly threadedly connected with the lifting ring, thereby effectively protecting the threaded hole 8 from contamination or damage, thereby achieving the purpose of quickly and efficiently hoisting the first plate 2 or the second plate 3. An anti-loss component 95 is provided on one side of the annular groove 93. The anti-loss component 95 is used in conjunction with the sealing plug 91 to prevent it from slipping or losing after it is removed, thereby increasing the convenience and reliability of the sealing plug 91 when used.

[0027] The anti-lost component 95 includes a storage cavity 951, which is located on one side of the inner wall of the annular groove 93. A rubber belt 952 is slidably connected in the inner cavity of the storage cavity 951. One end of the rubber belt 952 is fixedly connected to the surface of the convex ring 92, and the other end of the rubber belt 952 is fixedly connected to a block 953. The storage cavity 951 is designed as a two-stage variable diameter structure. The storage cavity 951 has a smaller diameter on the side close to the annular groove 93 and a larger diameter on the end away from the annular groove 93. The size of the block 953 is consistent with the storage cavity 951. The inner wall of the larger diameter side of the cavity 951 matches and is slidably connected. When the sealing plug 91 is removed, part of the rubber belt 952 can be brought out to the outside of the threaded hole 8. At this time, the block 953 will slide in the inner cavity of the storage cavity 951. Under the restriction of the smaller diameter of the inner wall of the storage cavity 951, the block 953 can be prevented from leaving the interior thereof. Accordingly, the rubber belt 952 can be prevented from completely leaving the interior of the storage cavity 951, thereby preventing the sealing plug 91 from accidentally slipping or being lost.

[0028] Working principle: When the damaged first plate 2 or second plate 3 needs to be repaired or replaced, firstly, the L-shaped rod 771 on one side of the snap-on shell 6 is moved to make its bottom end leave the hidden groove 773, and then the staff holds the vertical end of the L-shaped rod 771 and pulls it outward, so that the magnet 772 and the longitudinal H-shaped steel 1 are separated from the magnetic attraction, and the limit of the snap-on shell 6 can be released, and then the snap-on shell 6 is moved upward to make the snap-on groove 74 completely away from the opening groove 73, and at the same time, the second vertical groove 76 is completely separated from the upper cut groove 75, so that the upper limit of the horizontal H-shaped steel 4 can be quickly released. In the next step, the sealing plug 91 can be moved upward by shifting the hole 94 Pulling to allow the convex ring 92 to leave the inner wall of the annular groove 93 can fully expose the threaded hole 8, so that the lifting ring can be quickly and smoothly threadedly connected to the threaded hole 8. At this time, the anti-loss component 95 can prevent the sealing plug 91 from slipping and being lost. Thereafter, the damaged first plate 2 or second plate 3 is lifted up and replaced through the lifting ring. At this time, the lower cut groove 72 will also be away from the first vertical groove 71, so that the fixing seat 5 can release the limiting effect on the horizontal H-shaped steel 4. At this time, the slots 10 on the sides of the first plate 2 and the second plate 3 will also be disengaged accordingly, thereby achieving the purpose of quickly repairing and replacing the first plate 2 or the second plate 3.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] Although the 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 quickly repairable assembled pavement, comprising a longitudinal H-shaped steel (1) and a first plate (2) arranged on one side thereof, characterized in that: Also includes: A second plate (3) is arranged on one side of the longitudinal H-shaped steel (1) on the other side, the bottoms of the first plate (2) and the second plate (3) are fixedly connected to the transverse H-shaped steel (4), the bottoms of the transverse H-shaped steel (4) and the longitudinal H-shaped steel (1) are fixedly connected to the insertion rod (13), and the three side surfaces of the first plate (2) and the second plate (3) are provided with mutually staggered slots (10); A fixing seat (5) is fixedly connected to one side of the longitudinal H-shaped steel (1), a clamping shell (6) is arranged on the top of the longitudinal H-shaped steel (1), a clamping mechanism (7) is arranged on the inner wall of the fixing seat (5), threaded holes (8) are arranged on the top of the first plate (2) and the second plate (3), a closing mechanism (9) is installed above the inner cavity of the threaded hole (8), and bolting holes (14) are arranged on both ends of the longitudinal H-shaped steel (1).

2. The quickly repairable assembled pavement according to claim 1, characterized in that: The clamping mechanism (7) comprises a first vertical groove (71) provided on one side of the fixing seat (5) and a lower groove (72) provided on one side of the lower wing plate of the transverse H-shaped steel (4), an opening groove (73) provided on the top of the longitudinal H-shaped steel (1) and clamping grooves (74) provided on both sides of the clamping shell (6), an upper groove (75) provided on one side of the upper wing plate of the transverse H-shaped steel (4) and a second vertical groove (76) provided on the other side of the clamping shell (6), and an auxiliary component (77) is provided on one side of the clamping shell (6).

3. The quickly repairable assembled pavement according to claim 2, characterized in that: The auxiliary component (77) comprises an L-shaped rod (771) slidably connected to the inner wall of the snap-on shell (6) and a magnet (772) mounted on the horizontal end of the L-shaped rod (771), and also comprises a hidden groove (773) opened on one side of the snap-on shell (6).

4. The quickly repairable assembled pavement according to claim 1, characterized in that: The sealing mechanism (9) comprises a sealing plug (91) clamped on the upper part of the inner cavity of the threaded hole (8) and an annular groove (93) opened on the upper part of the inner cavity of the threaded hole (8), and also comprises a convex ring (92) fixedly connected to the surface of the sealing plug (91) and a shifting hole (94) opened on the top of the sealing plug (91); an anti-lost component (95) is arranged on one side of the annular groove (93).

5. The quickly repairable assembled pavement according to claim 4, characterized in that: The anti-loss component (95) comprises a storage cavity (951) opened on one side of the inner wall of the annular groove (93), a rubber belt (952) slidably connected to the inner cavity of the storage cavity (951), and a clamping block (953) fixedly connected to the other end of the rubber belt (952).

6. The quickly repairable assembled pavement according to claim 1, characterized in that: A water guide plate (11) is fixedly connected to one side of the first plate (2) and the second plate (3), and a drainage hole (12) is provided on the web of the longitudinal H-shaped steel (1).

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