Prefabricated guardrail connecting structure and construction method thereof

Abstract

The invention relates to a prefabricated guardrail connecting structure and a construction method thereof. The positioning pieces of the embedded connectors are arranged on the guardrail reinforcing steel bars, concrete is poured to form the prefabricated guardrail body, the reinforcing steel bars do not need to be reserved outside, and the prefabricated guardrail body can be conveniently transported and carried to a construction site. The opening of the butt joint hole in the connector piece is located in the pouring wall face of the concrete precast block, the connector can elastically deform in the direction of the axis of the connecting steel bar, and the connector is arranged in the butt joint hole in a penetrating mode after being shrunk. The locking assembly is operated from one side of the pouring wall face of the concrete precast block, so that the connector is clamped to the inner wall of the butt joint hole, the connecting steel bar and the connector piece are stably connected, and stable connection of the connecting steel bar and the precast guardrail body is achieved. During construction, only one end, provided with the connector, of the cast-in-place connecting rib assembly needs to be arranged in the butt joint hole in a penetrating mode, the locking assembly is locked on the pouring wall face, connection between the connecting reinforcing steel bar and the prefabricated guardrail body can be achieved, connection construction is simple and convenient, and connection is stable and reliable.

Description

Technical Field

[0001] The present application relates to the technical field of road foundation, and in particular to a prefabricated guardrail connection structure and a construction method thereof. Background Art

[0002] The viaduct is at a high position. By setting up concrete guardrails on both sides of the highway bridge, the occurrence of serious accidents such as vehicles falling off the bridge can be reduced. The concrete guardrail utilizes the high strength of the reinforced concrete structure to make the vehicle turn to absorb the collision energy, reducing the probability of an out-of-control vehicle passing through the guardrail and falling under the bridge. At present, concrete guardrails generally adopt cast-in-place construction technology, but the construction process of cast-in-place construction is complicated, the cycle is long, the quality is difficult to control, and the maintenance and repair are difficult. Precast concrete guardrails refer to a series of processes such as guardrail wall reinforcement, formwork, pouring, maintenance, and demolding that are all prefabricated in the factory. The actual project site can install and assemble the guardrail prefabricated blocks through the foundation connection components and longitudinal connection components. Precast concrete guardrails can greatly reduce the amount of on-site construction work.

[0003] Since the precast concrete guardrail needs to be connected to the cast-in-place layer of the road surface, the precast concrete guardrail needs to reserve external binding steel bars. If the reserved external binding steel bars are too short, it will be detrimental to the stability and reliability of the connection with the steel bars of the cast-in-place layer. If the reserved external binding steel bars are too long, it will be detrimental to transportation and handling. If the precast concrete guardrail does not reserve external binding steel bars, the steel bars of the cast-in-place layer need to be inserted into the precast concrete guardrail, and the connection often needs to be filled with concrete, and the reliability of the connection is poor. Summary of the invention

[0004] Based on this, it is necessary to provide a prefabricated guardrail connection structure and a construction method thereof that is conducive to transportation and handling and has high reliability of steel bar connection to address the above problems.

[0005] A prefabricated guardrail connection structure, the prefabricated guardrail connection structure comprises a prefabricated guardrail body, an embedded joint, a cast-in-place connecting bar assembly and a locking assembly, the prefabricated guardrail body comprises a guardrail steel bar and a concrete prefabricated block, the guardrail steel bar is arranged in the concrete prefabricated block; the embedded joint comprises a positioning member and a connecting member arranged on the positioning member, a positioning hole is formed in the positioning member, the positioning member is sleeved on the guardrail steel bar, a docking hole is formed in the connecting member, the embedded joint is arranged in the concrete prefabricated block, and the orifice of the docking hole is located on the casting wall surface of the concrete prefabricated block; the cast-in-place connecting bar assembly comprises a connecting steel bar and a connecting head, the connecting head is arranged on one end of the connecting steel bar, the connecting head can be elastically deformed in the direction of the axis of the connecting steel bar, and the connecting head can be inserted into the docking hole; the locking assembly is arranged on the connecting steel bar, and the locking assembly is locked on the casting wall surface of the concrete prefabricated block so that the connecting head is clamped on the inner wall of the docking hole.

[0006] In one embodiment, the docking hole includes a through hole and a snap-in hole connected to the through hole, and one end of the through hole away from the snap-in hole is located on the casting wall surface of the concrete precast block, and the aperture of the snap-in hole is larger than the aperture of the through hole; the connecting head includes a plurality of elastic parts, and the plurality of elastic parts are arranged at intervals around the axis of the connecting steel bar, and each of the elastic parts can shrink toward the axis direction of the connecting steel bar when subjected to radial force, and one end of the connecting steel bar is penetrated in the docking hole so that the elastic part abuts against the inner wall of the snap-in hole.

[0007] In one of the embodiments, the prefabricated guardrail connection structure also includes a mating component, which includes a clamping piece. The clamping piece can be sleeved on the connecting steel bar and located in the clamping hole, and the elastic part can be inserted between the clamping piece and the hole wall of the clamping hole.

[0008] In one of the embodiments, the clamping member can be elastically deformed toward the axial direction of the connecting steel bar under force, and when the elastic portion is inserted between the clamping member and the hole wall of the clamping hole, the elastic portion and the clamping member are pressed between the connecting steel bar and the hole wall of the clamping hole.

[0009] In one embodiment, the mating component also includes a mating sleeve, the outer diameter of the mating sleeve is less than or equal to the inner diameter of the through hole, and the inner diameter of the mating sleeve is greater than or equal to the outer diameter of the connecting steel bar; the clamping piece includes a plurality of clamping springs, the plurality of clamping springs are spaced around the axis of the mating sleeve, and one end of each clamping spring is connected to one end of the mating sleeve; the plurality of clamping springs form a clamping space, in a first deformation state, the clamping springs are elastically deformed relative to the mating sleeve, the outer diameter of the clamping piece is less than or equal to the inner diameter of the through hole, in a second deformation state, the clamping springs are reset, the inner diameter of the clamping space is greater than or equal to the outer diameter of the connecting steel bar, and the outer diameter of the clamping piece is greater than the inner diameter of the through hole and smaller than the inner diameter of the clamping hole.

[0010] In one embodiment, the outer wall surface of the clamping spring is an arc surface, the inner wall surface of the connection between the clamping hole and the penetration hole is adapted to the outer wall surface of the clamping spring, and the distance between the clamping spring and the inner wall of the clamping hole tends to decrease along the direction toward the penetration hole; and / or

[0011] A clamping groove is arranged on the outer wall of the connecting steel bar, and a matching hole matching the clamping groove is also opened on the matching sleeve, and the end of the elastic part can pass through the matching hole and be inserted into the clamping groove.

[0012] In one of the embodiments, the locking assembly includes a guide sleeve and a locking sleeve arranged on one end of the guide sleeve, the guide sleeve is sleeved on the connecting steel bar and can be inserted into the matching sleeve, and the locking sleeve is threadedly connected to the connecting steel bar and can be screwed onto the casting wall surface of the precast concrete block.

[0013] In one embodiment, the prefabricated guardrail connection structure also includes a binding assembly, which includes a binding sleeve and at least two binding steel bars. The binding sleeve is arranged on the connecting piece, one end of the binding steel bar is connected to the binding sleeve, and the other end is bound to the guardrail steel bar. The binding assembly can provide the connecting piece with a force to resist deformation in a direction away from the positioning piece.

[0014] In one embodiment, the cross-sectional size of the end of the connector away from the positioning member gradually decreases, the inner diameter size of the binding sleeve gradually decreases along the direction from the positioning member to the connector, and the binding sleeve is arranged on the end of the connector away from the positioning member.

[0015] A construction method for a prefabricated guardrail connection structure, applied to the prefabricated guardrail connection structure as described above, characterized in that the construction method comprises:

[0016] The matching component is inserted into the docking hole from one side of the cast wall of the prefabricated guardrail body, so that the clamping piece of the matching component is located in the clamping hole of the docking hole;

[0017] The connecting head of the cast-in-place connecting bar assembly is retracted toward the axial direction of the connecting steel bar, and is inserted into the docking hole from one side of the casting wall surface of the prefabricated guardrail body, so that the elastic part is located on the side of the clamping member facing away from the casting wall surface;

[0018] The locking assembly is arranged on the connecting steel bars of the cast-in-place connecting bar assembly and locked on the casting wall surface so that the elastic part of the connecting head is passed through between the clamping piece and the hole wall of the clamping hole.

[0019] The above-mentioned prefabricated guardrail connection structure and its construction method have the beneficial effect compared with the prior art in that the positioning piece of the embedded joint is set on the guardrail steel bar, and then concrete is poured to form a concrete prefabricated block, and then the prefabricated guardrail body is formed. The embedded joint is embedded in the prefabricated guardrail body, and there is no need to reserve steel bars outside, which is convenient for transporting and carrying the prefabricated guardrail body to the construction site. During transportation and handling, there is no need to consider the inconvenience caused by the reserved steel bars. During on-site construction, since the opening of the docking hole in the joint piece is located on the casting wall surface of the concrete prefabricated block, and the connecting head can be elastically deformed in the direction of the axis of the connecting steel bar, the connecting head of the cast-in-place connecting bar assembly is contracted and inserted into the docking hole. The locking assembly is operated from one side of the casting wall surface of the concrete prefabricated block, so that the connecting head is clamped on the inner wall of the docking hole, and then the connecting head set on the connecting steel bar cooperates with the locking assembly to stably connect the connecting steel bar and the joint piece, thereby realizing a stable connection between the connecting steel bar and the prefabricated guardrail body. When the above-mentioned prefabricated guardrail connection structure is constructed on site, it is only necessary to insert one end of the cast-in-place connecting reinforcement assembly with the connecting head into the docking hole, and lock the locking assembly on the casting wall surface to achieve the connection between the connecting reinforcement and the prefabricated guardrail body. The connection construction is simple and convenient, the connection is stable and reliable, and the efficiency and quality of highway guardrail construction and installation are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0023] Figure 1 It is a schematic diagram of the overall structure of a prefabricated guardrail connection structure in one embodiment.

[0024] Figure 2 A cross-sectional view of a prefabricated guardrail connection structure in an embodiment omitting the prefabricated guardrail body Figure 1 .

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0026] Figure 4 for Figure 2 The prefabricated guardrail connection structure shown omits the cross-sectional view of the prefabricated guardrail body. Figure 2 .

[0027] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0028] Figure 6 Schematic diagram of the structure of a cast-in-place connecting reinforcement assembly in one embodiment.

[0029] Figure 7 It is a schematic diagram of the structure of the matching components in one embodiment.

[0030] Figure 8 Schematic diagram of the structure of a locking assembly in one embodiment.

[0031] Fig. 9 The present invention is a flow chart of a construction method of a prefabricated guardrail connection structure in one embodiment.

[0032] Description of reference numerals:

[0033] Prefabricated guardrail connection structure 10; prefabricated guardrail body 100; guardrail steel bar 110; prefabricated concrete block 120; cast wall 130; embedded joint 200; positioning piece 210; joint piece 220; docking hole 221; penetration hole 222; snap-in hole 223; cast-in-place connecting bar assembly 300; connecting steel bar 310; snap-in groove 312; connecting head 320; elastic part 322; locking assembly 400; locking sleeve 410; guide sleeve 420; matching assembly 500; clamping piece 510; clamping spring piece 512; snap-in space 514; matching sleeve 520; washer 530; binding assembly 600; binding sleeve 610; binding steel bar 620. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] See also Figures 1 to 5 The prefabricated guardrail connection structure 10 in one embodiment of the present application can at least improve the convenience of transportation and handling, and ensure the reliability of the steel bar connection. Specifically, the prefabricated guardrail connection structure 10 includes a prefabricated guardrail body 100, an embedded joint 200, a cast-in-place connecting bar assembly 300 and a locking assembly 400. The prefabricated guardrail body 100 includes a guardrail steel bar 110 and a concrete precast block 120. The guardrail steel bar 110 is arranged in the concrete precast block 120; the embedded joint 200 includes a positioning member 210 and a joint member 220 arranged on the positioning member 210. A positioning hole is formed in the positioning member 210. The positioning member 210 is sleeved on the guardrail steel bar 110. A docking hole 221 is formed in the joint member 220. The embedded joint 200 is arranged in the concrete precast block 120, and the orifice of the docking hole 221 is located on the casting wall surface 130 of the concrete precast block 120. The cast-in-place connecting bar assembly 300 includes a connecting steel bar 310 and a connecting head 320. The connecting head 320 is arranged on one end of the connecting steel bar 310. The connecting head 320 can be elastically deformed in the direction of the axis of the connecting steel bar 310. The connecting head 320 can be inserted into the docking hole 221. The locking assembly 400 is arranged on the connecting steel bar 310. The locking assembly 400 is locked on the casting wall surface 130 of the concrete prefabricated block 120 so that the connecting head 320 is clamped on the inner wall of the docking hole 221. The casting wall surface 130 is a wall surface connected to the cast-in-place layer of the highway.

[0036] During construction, the positioning piece 210 of the embedded joint 200 is set on the guardrail steel bar 110, and then concrete is poured to form a concrete precast block 120, thereby forming a precast guardrail body 100. The embedded joint 200 is embedded in the precast guardrail body 100, and there is no need to reserve steel bars outside, which is convenient for transporting and carrying the precast guardrail body 100 to the construction site. During transportation and handling, there is no need to consider the inconvenience caused by the reserved steel bars. During on-site construction, since the opening of the docking hole 221 in the joint piece 220 is located on the casting wall 130 of the concrete precast block 120, and the connecting head 320 can be elastically deformed in the direction of the axis of the connecting steel bar 310, the connecting head 320 of the cast-in-place connecting bar assembly 300 is contracted and inserted into the docking hole 221. The locking assembly 400 is operated from one side of the casting wall surface 130 of the precast concrete block 120, so that the connecting head 320 is clamped on the inner wall of the docking hole 221, and then the connecting head 320 set on the connecting steel bar 310 cooperates with the locking assembly 400, so that the connecting steel bar 310 is stably connected to the joint piece 220, thereby realizing the stable connection between the connecting steel bar 310 and the precast guardrail body 100. When the above-mentioned precast guardrail connection structure 10 is constructed on site, it is only necessary to insert one end of the cast-in-place connecting bar assembly 300 provided with the connecting head 320 into the docking hole 221, and lock the locking assembly 400 on the casting wall surface 130, so as to realize the connection between the connecting steel bar 310 and the precast guardrail body 100. The connection construction is simple and convenient, and the connection is stable and reliable, which effectively improves the efficiency and quality of highway guardrail construction and installation.

[0037] See also Figures 2 to 6 In one embodiment, the docking hole 221 includes a through hole 222 and a clamping hole 223 connected to the through hole 222, and one end of the through hole 222 away from the clamping hole 223 is located on the casting wall surface 130 of the precast concrete block 120, and the aperture of the clamping hole 223 is larger than the aperture of the through hole 222. Since the connector 320 can be elastically deformed toward the axis of the connecting steel bar 310, the connector 320 can pass through the through hole 222 and be inserted into the clamping hole 223. After the connector 320 is inserted into the clamping hole 223, it is released to be clamped in the clamping hole 223.

[0038] Specifically, the connector 320 includes a plurality of elastic parts 322, which are arranged at intervals around the axis of the connecting steel bar 310, and each elastic part 322 can shrink toward the axis of the connecting steel bar 310 when subjected to radial force, and one end of the connecting steel bar 310 is inserted into the docking hole 221 so that the elastic part 322 abuts against the inner wall of the clamping hole 223. Through the elastic deformation of the plurality of elastic parts 322, it is easy to pass through the insertion hole 222, and through the elastic part 322 abutting against the inner wall of the clamping hole 223, one end of the connecting steel bar 310 is stably set in the clamping hole 223.

[0039] In this embodiment, the elastic part 322 may be a sheet-like structure, one end of the elastic part 322 is connected to one end of the connecting steel bar 310, and the other end is suspended outside the connecting steel bar 310, so that the other end of the elastic part 322 can be deformed in the direction of the connecting steel bar 310. In other embodiments, the elastic part 322 may also be a columnar structure or other shapes, as long as it can pass through the through hole 222 and be clamped in the clamping hole 223.

[0040] See also Figures 3 to 7 In one embodiment, the prefabricated guardrail connection structure 10 further includes a matching component 500, which includes a clamping member 510. The clamping member 510 can be sleeved on the connecting steel bar 310 and located in the clamping hole 223, and the elastic part 322 can be inserted between the clamping member 510 and the hole wall of the clamping hole 223. By providing the clamping member 510, the elastic part 322 can be restricted between the clamping member 510 and the hole wall of the clamping hole 223. At the same time, the clamping member 510 is located between the connecting steel bar 310 and the elastic part 322, which can limit the contraction of the elastic part 322, thereby limiting the elastic part 322 from being separated from the docking hole 221. By providing the matching component 500, the reliability of the connection head 320 in the clamping hole 223 is effectively improved.

[0041] In one embodiment, the clamping member 510 is subjected to force and can be elastically deformed toward the axial direction of the connecting steel bar 310. When the elastic portion 322 is inserted between the clamping member 510 and the hole wall of the clamping hole 223, the elastic portion 322 and the clamping member 510 are pressed between the connecting steel bar 310 and the hole wall of the clamping hole 223. In the locked state, the elastic portion 322, the clamping member 510, the connecting steel bar 310 and the hole wall of the clamping hole 223 are pressed together, which can effectively prevent the connecting steel bar 310 and the elastic portion 322 from moving in the clamping hole 223, improve the reliability of the connection, and further ensure the stability of the setting of the connecting steel bar 310.

[0042] Specifically, the mating assembly 500 further includes a mating sleeve 520, the outer diameter of the mating sleeve 520 is less than or equal to the inner diameter of the penetration hole 222, and the inner diameter of the mating sleeve 520 is greater than or equal to the outer diameter of the connecting steel bar 310. The clamping member 510 includes a plurality of clamping springs 512, which are arranged at intervals around the axis of the mating sleeve 520, and one end of each clamping spring 512 is connected to one end of the mating sleeve 520; the plurality of clamping springs 512 surround a clamping space 514. Each clamping spring 512 can be elastically deformed relative to the mating sleeve 520. In the first deformation state, the clamping spring 512 is elastically deformed relative to the mating sleeve 520, so that the outer diameter of the clamping member 510 is less than or equal to the inner diameter of the penetration hole 222, and the clamping member 510 can pass through the penetration hole 222 and be inserted into the clamping hole 223. In the second deformation state, the clamping spring 512 is reset so that the inner diameter of the clamping space 514 is greater than or equal to the outer diameter of the connecting steel bar 310, and the outer diameter of the clamping member 510 is greater than the inner diameter of the penetration hole 222 and smaller than the inner diameter of the clamping hole 223. At this time, the clamping spring 512 is limited in the clamping hole 223. The connecting steel bar 310 can be penetrated in the clamping space 514. When the connecting steel bar 310 is penetrated in the clamping space 514, the elastic deformation range of the clamping spring 512 can be limited, thereby preventing the clamping spring 512 from being separated from the clamping hole 223 due to deformation.

[0043] In one embodiment, the distance between the outer wall surface of the clamping spring 512 and the inner wall surface of the clamping hole 223 tends to decrease along the direction from the positioning member 210 to the joint member 220, so as to clamp the elastic part 322 between the clamping spring 512 and the hole wall of the clamping hole 223. Specifically, the outer wall surface of the clamping spring 512 is an arc surface, the inner wall surface of the connection between the clamping hole 223 and the penetration hole 222 is adapted to the outer wall surface of the clamping spring 512, and the distance between the clamping spring 512 and the inner wall of the clamping hole 223 tends to decrease along the direction toward the penetration hole 222. The arc surface can facilitate the elastic part 322 to be inserted between the clamping spring 512 and the hole wall of the clamping hole 223, and by guiding the elastic part 322 to deform along the arc surface, the possibility of the elastic part 322 moving is further reduced.

[0044] In one embodiment, a clamping groove 312 is provided on the outer wall of the connecting steel bar 310, and a matching hole matching the clamping groove 312 is also provided on the matching sleeve 520, and the end of the elastic part 322 can pass through the matching hole and be inserted into the clamping groove 312. When the end of the elastic part 322 passes through the matching hole and is inserted into the clamping groove 312, the elastic part 322 and the connecting steel bar 310 form a mutually locked structure, further reducing the possibility of the connecting steel bar 310 being separated from the clamping hole 223. In other embodiments, the clamping groove 312 and the matching hole can also be omitted, and the elastic part 322 is only inserted between the clamping spring 512 and the wall of the clamping hole 223.

[0045] See also Figure 2 , Figure 4 and Figure 8 In one embodiment, the locking assembly 400 includes a locking sleeve 410, which is connected to the connecting steel bar 310 by threading and can be screwed on the casting wall 130 of the prefabricated concrete block 120. The connecting steel bar 310 can be pulled outward by screwing the locking sleeve 410, and the elastic part 322 of the connector 320 at the end of the connecting steel bar 310 is inserted between the clamping member 510 and the hole wall of the clamping hole 223 while the locking sleeve 410 is screwed. As the locking sleeve 410 is continuously screwed, the elastic part 322 is gradually pressed between the clamping member 510 and the hole wall of the clamping hole 223, and the clamping member 510 can also be pressed on the connecting steel bar 310, so as to achieve a stable interference connection fit. The entire connection process only requires screwing the locking sleeve 410.

[0046] Specifically, the locking assembly 400 further includes a guide sleeve 420, one end of which is connected to the locking sleeve 410, and the guide sleeve 420 is sleeved on the connecting steel bar 310 and can be inserted into the matching sleeve 520. By providing the guide sleeve 420, the space between the matching sleeve 520 and the connecting steel bar 310 can be filled, so that the connecting steel bar 310 is prevented from moving in the insertion hole 222, and the reliability of the connecting steel bar 310 being set in the insertion hole 222 is further improved. In this embodiment, the guide sleeve 420, the matching sleeve 520 and the connecting steel bar 310 can be interference fit, so as to improve the stability of the connecting steel bar 310 being partially set in the insertion hole 222.

[0047] See also Figure 7 Furthermore, the matching assembly 500 further includes a washer 530, which is disposed on a side of the matching sleeve 520 that is opposite to the clamping member 510. When the matching sleeve 520 and the clamping member 510 are inserted into the docking hole 221, the washer 530 is located on the casting wall surface 130 of the prefabricated guardrail body 100. When the locking sleeve 410 is screwed onto the connecting steel bar 310, it can abut against the washer 530.

[0048] In this embodiment, the mating component 500 may be an integrally formed structure to ensure the structural reliability of the mating component 500 .

[0049] See also Figure 1 , Figure 2 and Figure 4 In one embodiment, the prefabricated guardrail connection structure 10 further includes a binding assembly 600, which includes a binding sleeve 610 and at least two binding steel bars 620. The binding sleeve 610 is arranged on the joint piece 220, one end of the binding steel bar 620 is connected to the binding sleeve 610, and the other end is bound with the guardrail steel bar 110. The binding assembly 600 can provide the joint piece 220 with a force to resist deformation in a direction away from the positioning piece 210. When the prefabricated guardrail body 100 is installed on the road, the connecting steel bar 310 is cast on the road, and a vehicle collides with the prefabricated guardrail body 100, the prefabricated guardrail body 100 is subjected to an outward thrust, and the joint piece 220 is connected to the connecting steel bar 310, thereby causing the embedded joint 200 to be subjected to an outward pulling force relative to the prefabricated guardrail body 100. The binding sleeve 610 and the binding steel bar 620 can improve the reliability of the embedded joint 200 in the prefabricated guardrail body 100.

[0050] Specifically, the cross-sectional size of the end of the connector 220 away from the positioning member 210 gradually decreases, and the inner diameter size of the binding sleeve 610 gradually decreases along the direction from the positioning member 210 to the connector 220. The binding sleeve 610 is sleeved on the end of the connector 220 away from the positioning member 210. Through the cooperation between the connector 220 with a conical structure and the binding sleeve 610, the position of the binding sleeve 610 is easily adjusted during the binding process of the steel bars 620 and the guardrail steel bars 110, thereby improving the convenience of binding.

[0051] In this embodiment, the positioning member 210 and the binding steel bars 620 are connected to different guardrail steel bars 110 to avoid being connected to one guardrail steel bar 110, which would cause the guardrail steel bar 110 to be subjected to greater stress.

[0052] In this embodiment, the positioning hole of the positioning member 210 and the guardrail steel bar 110 can also be matched with each other by means of a threaded connection, or the positioning member 210 can also be directly sleeved on the guardrail steel bar 110.

[0053] See also Figure 1 , Figure 2 , Figure 4 and Fig. 9 The present application also discloses a construction method of a prefabricated guardrail connection structure 10, the construction method comprising:

[0054] After the embedded joint 200 is set on the guardrail steel bar 110, concrete is poured to form the prefabricated guardrail body 100. Specifically, the positioning member 210 is sleeved on one guardrail steel bar 110, and the binding steel bar 620 is tied to another guardrail steel bar 110, so that the opening of the docking hole 221 of the embedded joint 200 can be located on the casting wall surface 130 of the prefabricated guardrail body 100. Then, concrete is poured until the concrete solidifies to form the prefabricated guardrail body 100.

[0055] Clean the hole wall of the docking hole 221. Specifically, the hole wall of the docking hole 221 can be cleaned before construction to prevent the concrete particles in the docking hole 221 from affecting the reliability of the subsequent cast-in-place connecting bar assembly 300. In this embodiment, the hole wall of the docking hole 221 can be cleaned by high-pressure airflow.

[0056] The matching component 500 is inserted into the docking hole 221 from one side of the casting wall surface 130 of the prefabricated guardrail body 100, so that the clamping member 510 of the matching component 500 is located in the clamping hole 223 of the docking hole 221. Specifically, the clamping spring 512 of the clamping member 510 can be deformed and contracted, and then the clamping spring 512 is first contracted and then passed through the penetration hole 222 and into the clamping hole 223. The matching component 500 is installed at the construction site, and it is avoided to be installed before pouring concrete, so as to prevent the concrete from entering the docking hole 221 and affecting the movement of the clamping member 510.

[0057] The connector 320 of the cast-in-place connecting bar assembly 300 is retracted toward the axial direction of the connecting steel bar 310, and is inserted into the docking hole 221 from the side of the casting wall surface 130 of the prefabricated guardrail body 100, so that the elastic portion 322 is located on the side of the clamping member 510 that is away from the casting wall surface 130. When the connecting steel bar 310 is inserted into the clamping hole 223, the deformation degree of the clamping spring 512 of the clamping member 510 can be limited, preventing the clamping member 510 from being separated from the docking hole 221.

[0058] The locking assembly 400 is arranged on the connecting steel bar 310 of the cast-in-place connecting bar assembly 300 and locked on the casting wall surface 130, so that the elastic part 322 of the connecting head 320 is inserted between the clamping piece 510 and the hole wall of the clamping hole 223. Specifically, the locking assembly 400 is screwed to lock the locking assembly 400 on the casting wall surface 130. While screwing the locking assembly 400, the elastic part 322 of the connecting head 320 is gradually pressed between the clamping piece 510 and the hole wall of the clamping hole 223, and the clamping piece 510 can also be pressed on the connecting steel bar 310. The entire connection process only requires screwing the locking assembly 400.

[0059] If the connecting steel bars 310 are traditionally tied to the guardrail steel bars 110 before pouring the concrete, then after the pouring is completed, the connecting steel bars 310 are reserved on the outside of the prefabricated guardrail. On the one hand, the reserved connecting steel bars 310 make demoulding difficult, and on the other hand, the connecting steel bars 310 occupy a large space, which increases the difficulty of transportation and handling. If a reserved hole is set on the prefabricated guardrail, and the connecting steel bars 310 are inserted into the reserved hole, on the one hand, the connection stability is poor, and on the other hand, in order to improve the connection reliability, a second pouring may be required, which affects the construction progress. If an embedded steel plate is set on the prefabricated guardrail, it is connected to the connecting steel bars 310 or other structural parts by welding, but this solution has a large amount of welding work, the construction process is relatively cumbersome, and the durability of the weld is poor. It is also not convenient for quality inspection and the connection reliability is poor.

[0060] The prefabricated guardrail connection structure 10 of the present application has no reserved steel bars on the outer surface of the prefabricated guardrail body 100, which is convenient for transportation and handling. In the connection process, it is only necessary to first insert the matching component 500, then insert the cast-in-place connecting bar component 300, and finally screw the locking component 400 to stably connect the connecting steel bar 310 to the prefabricated guardrail body 100. The construction process is simple and convenient, which greatly improves the construction efficiency. At the same time, the connecting head 320 on the connecting steel bar 310 is fastened in the clamping hole 223 through the clamping member 510 of the matching component 500, and the connecting steel bar 310 located in the penetration hole 222 is fastened through the matching sleeve 520 and the guide sleeve 420, which effectively improves the stability of the connection between the connecting steel bar 310 and the connector 220.

[0061] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0062] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A prefabricated guardrail connection structure, characterized in that: The prefabricated guardrail connection structure comprises: A prefabricated guardrail body, the prefabricated guardrail body comprising guardrail steel bars and prefabricated concrete blocks, the guardrail steel bars being arranged in the prefabricated concrete blocks; An embedded joint, the embedded joint comprises a positioning member and a joint member arranged on the positioning member, the positioning member is formed with a positioning hole, the positioning member is sleeved on the guardrail steel bar, the joint member is formed with a docking hole, the embedded joint is arranged in the precast concrete block, and the orifice of the docking hole is located on the casting wall surface of the precast concrete block; A cast-in-place connecting bar assembly, the cast-in-place connecting bar assembly comprising a connecting steel bar and a connecting head, the connecting head being arranged on one end of the connecting steel bar, the connecting head being capable of elastically deforming in the direction of the axis of the connecting steel bar, and the connecting head being capable of being inserted into the butt hole; and A locking assembly is arranged on the connecting steel bar, and the locking assembly is locked on the casting wall surface of the precast concrete block so that the connecting head is clamped on the inner wall of the docking hole.

2. The prefabricated guardrail connection structure according to claim 1, characterized in that: The docking hole includes a through hole and a clamping hole connected to the through hole, and one end of the through hole away from the clamping hole is located on the casting wall surface of the concrete precast block, and the aperture of the clamping hole is larger than the aperture of the through hole; the connecting head includes a plurality of elastic parts, and the plurality of elastic parts are arranged at intervals around the axis of the connecting steel bar, and each of the elastic parts can shrink toward the axis direction of the connecting steel bar when subjected to radial force, and one end of the connecting steel bar is penetrated in the docking hole so that the elastic part abuts against the inner wall of the clamping hole.

3. The prefabricated guardrail connection structure according to claim 2, characterized in that: The prefabricated guardrail connection structure also includes a matching component, which includes a clamping piece. The clamping piece can be sleeved on the connecting steel bar and located in the clamping hole. The elastic part can be inserted between the clamping piece and the hole wall of the clamping hole.

4. The prefabricated guardrail connection structure according to claim 3, characterized in that: The clamping piece can be elastically deformed toward the axial direction of the connecting steel bar when subjected to force. When the elastic portion is inserted between the clamping piece and the hole wall of the clamping hole, the elastic portion and the clamping piece are pressed between the connecting steel bar and the hole wall of the clamping hole.

5. The prefabricated guardrail connection structure according to claim 4, characterized in that: The mating component also includes a mating sleeve, the outer diameter of the mating sleeve is less than or equal to the inner diameter of the penetration hole, and the inner diameter of the mating sleeve is greater than or equal to the outer diameter of the connecting steel bar; the clamping piece includes a plurality of clamping springs, and the plurality of clamping springs are spaced around the axis of the mating sleeve, and one end of each clamping spring is connected to one end of the mating sleeve; the plurality of clamping springs form a clamping space, and in a first deformation state, the clamping springs are elastically deformed relative to the mating sleeve, and the outer diameter of the clamping piece is less than or equal to the inner diameter of the penetration hole, and in a second deformation state, the clamping springs are reset, and the inner diameter of the clamping space is greater than or equal to the outer diameter of the connecting steel bar, and the outer diameter of the clamping piece is greater than the inner diameter of the penetration hole and smaller than the inner diameter of the clamping hole.

6. The prefabricated guardrail connection structure according to claim 5, characterized in that: The outer wall surface of the clamping spring is an arc surface, the inner wall surface of the connection between the clamping hole and the penetration hole is adapted to the outer wall surface of the clamping spring, and the distance between the clamping spring and the inner wall of the clamping hole tends to decrease along the direction toward the penetration hole; and / or A clamping groove is arranged on the outer wall of the connecting steel bar, and a matching hole matching the clamping groove is also opened on the matching sleeve, and the end of the elastic part can pass through the matching hole and be inserted into the clamping groove.

7. The prefabricated guardrail connection structure according to claim 5, characterized in that: The locking assembly includes a guide sleeve and a locking sleeve arranged on one end of the guide sleeve, the guide sleeve is sleeved on the connecting steel bar and can be inserted into the matching sleeve, and the locking sleeve is connected to the connecting steel bar through a thread and can be screwed on the casting wall surface of the concrete precast block.

8. The prefabricated guardrail connection structure according to any one of claims 1 to 7, characterized in that: The prefabricated guardrail connection structure also includes a binding assembly, which includes a binding sleeve and at least two binding steel bars. The binding sleeve is arranged on the connecting piece, one end of the binding steel bar is connected to the binding sleeve, and the other end is bound to the guardrail steel bar. The binding assembly can provide the connecting piece with a force to resist deformation in a direction away from the positioning piece.

9. The prefabricated guardrail connection structure according to claim 8, characterized in that: The cross-sectional dimension of the end of the connector away from the positioning member gradually decreases, the inner diameter dimension of the binding sleeve gradually decreases along the direction from the positioning member to the connector, and the binding sleeve is arranged on the end of the connector away from the positioning member.

10. A construction method for a prefabricated guardrail connection structure, applied to the prefabricated guardrail connection structure according to any one of claims 3 to 7, characterized in that: The construction method comprises: The matching component is inserted into the docking hole from one side of the cast wall of the prefabricated guardrail body, so that the clamping piece of the matching component is located in the clamping hole of the docking hole; The connecting head of the cast-in-place connecting bar assembly is retracted toward the axial direction of the connecting steel bar, and is inserted into the docking hole from one side of the casting wall surface of the prefabricated guardrail body, so that the elastic part is located on the side of the clamping member facing away from the casting wall surface; The locking assembly is arranged on the connecting steel bars of the cast-in-place connecting bar assembly and locked on the casting wall surface so that the elastic part of the connecting head is passed through between the clamping piece and the hole wall of the clamping hole.

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