Continuous reinforced concrete pavement expansion joint force transmission structure and construction method

Abstract

The application discloses a continuous reinforced concrete pavement expansion joint force transmission structure and a construction method. The force transmission structure is installed at the expansion joint before concrete pouring after the steel reinforcement frame of the concrete slab is bound and the end head formwork is erected. The force transmission structure comprises a force transmission rod and an expansion joint plate fixed at the middle part of the force transmission rod. The expansion joint plate is arranged in the expansion joint. Perforations are formed on the first end head formwork and the second end head formwork on the two sides of the expansion joint. The two ends of the force transmission rod respectively pass through the first end head formwork and the second end head formwork and extend into the first concrete steel reinforcement frame and the second concrete steel reinforcement frame on the two sides of the expansion joint. One end of the force transmission rod is provided with a buffer sleeve. The buffer sleeve and a buffer mechanism are connected with the concrete steel reinforcement frame on the corresponding side. The application is stable during the construction process, can avoid deformation and displacement of the force transmission rod, and can automatically shrink along with the expansion and shrinkage of the concrete during the concrete expansion process after the force transmission rod is installed, so that the force transmission effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete pavement, in particular to a continuous reinforced concrete pavement expansion joint load transfer structure and construction method. BACKGROUND

[0002] Continuous reinforced concrete pavement is a kind of concrete pavement structure form used to overcome various diseases of jointed cement concrete pavement and improve pavement performance, mainly by arranging a sufficient number of steel bars in the longitudinal direction of the pavement to control the cracks caused by longitudinal shrinkage of the concrete pavement slab, forming a complete and flat driving surface during construction, enhancing the overall stiffness of the pavement slab and improving the stability of vehicle driving.

[0003] At present, the concrete pavement of municipal road engineering adopts continuous reinforced concrete slab + asphalt surface layer structure in pavement structure design. The cement concrete slab needs to be provided with expansion joints to reduce the constraint on temperature and humidity deformation, reduce temperature and humidity stress, and control the position of surface slab cracking. The expansion joint of the cement concrete slab can effectively alleviate the occurrence of arching disease during heating. In general, one expansion joint is set every 200m, or it must be set at the intersection with other roads and the connection with the bridge. The width of the expansion joint is about 2.5cm. Due to the large width of the expansion joint, even if the joint filling treatment is performed, under the continuous action of vehicle load, it is also easy to cause cracks in the asphalt concrete surface layer, causing the asphalt concrete above the expansion joint to sink and break, and the asphalt concrete surface layer disease also extends further to both sides of the expansion joint, sharply reducing the driving comfort.

[0004] In order to improve the expansion and load transfer of the concrete structure at both ends of the expansion joint, and at the same time avoid the occurrence of joint fault disease at the expansion joint, and prolong the service life of the pavement, a load transfer bar is constructed at the expansion joint position. The setting of the load transfer bar can improve the expansion and load transfer of the concrete structure at both ends of the expansion joint, solve the problem of shortening the service life of the pavement caused by the expansion joint. For example, the invention with publication number CN110965426A, a rigid-flexible composite pavement expansion joint structure and construction method, the rigid-flexible composite pavement expansion joint structure includes an upper and lower arranged asphalt concrete layer and a concrete layer, the concrete layer is provided with an expansion joint and a plurality of load transfer bar assemblies, and the expansion joint is provided with an expansion joint plate; the load transfer bar assembly includes a load transfer bar buffer sleeve arranged on one side of the expansion joint and a load transfer bar slidably inserted into the load transfer bar buffer sleeve at one end, and the other end of the load transfer bar penetrates through the expansion joint plate and penetrates into the concrete layer.

[0005] However, in the prior art, the dowel bar is difficult to fix stably when expanding the joint, and in the process of pouring concrete, it is easy to cause the phenomena of uneven installation of the dowel bar, end template running, joint filler cracking, unreasonable placement of the dowel bar, reduction of the force transmission effect, uneven distribution of the bearing capacity of the base layer in the transverse direction, and inconsistent settlement in the operation of each section. Moreover, it will also cause the misalignment of the two plates on both sides of the joint in the expansion and extrusion process. Misalignment is difficult to repair, which is time-consuming, low in efficiency, and high in cost. Once not repaired in time, arch expansion will occur, and in severe cases, it will even cause a car crash and death tragedy.

[0006] At present, there are mainly two methods for fixing the dowel bar at the expansion joint of the continuously reinforced concrete pavement, one is the end template fixing method for the dowel bar, which is suitable for the expansion joint set when the concrete slab is not continuously poured, specifically, the dowel bar is fixed at the position of the expansion joint through the end templates of two adjacent concrete slabs, and after pouring the concrete, the two ends of the dowel bar are fixed in the concrete slab; the other is the support fixing method for the dowel bar, which is suitable for the expansion joint set when the concrete slab is continuously poured, specifically, the dowel bar is erected at the position of the expansion joint through two supports, and then the formwork is erected to pour the concrete. However, the above two methods for fixing the dowel bar are not very stable, and the dowel bar is easy to deform in the process of pouring concrete. When the dowel bar is fixed through the end template, it is also easy to run off the template during pouring of the concrete. When the dowel bar is fixed through the support, the steel reinforcement of the support is easy to deviate, and the dowel bar is easy to shift. Moreover, in the existing method, the dowel bar is in hard contact with the concrete, and after pouring the concrete, the dowel bar is fixed and cannot deform. In the process of expansion of the concrete, the dowel bar is also deformed, which will cause uneven stress and reduce the force transmission effect.

[0007] Therefore, it is necessary to provide a continuously reinforced concrete pavement expansion joint force transmission structure and a construction method thereof in view of the above problems. SUMMARY

[0008] The purpose of the present application is to provide a continuously reinforced concrete pavement expansion joint force transmission structure and a construction method thereof, which is stable in the construction process, can avoid deformation and displacement of the dowel bar, and can shrink with the expansion of the concrete after the dowel bar is installed, thereby improving the force transmission effect.

[0009] In order to achieve the above technical purpose, the application provides a continuous reinforced concrete pavement expansion joint force transmission structure, which is installed at the expansion joint before concrete pouring after the steel reinforcement frame of the concrete slab is bound and the end head formwork is erected, the force transmission structure comprises a force transmission rod and an expansion joint plate fixed at the middle part of the force transmission rod, the expansion joint plate is arranged in the expansion joint, and perforations are formed on the first end head formwork and the second end head formwork on the two sides of the expansion joint, the two ends of the force transmission rod respectively penetrate the first end head formwork and the second end head formwork and extend into the first concrete steel reinforcement frame and the second concrete steel reinforcement frame on the two sides of the expansion joint, one end of the force transmission rod is provided with a buffer sleeve, the buffer sleeve is fixed on the corresponding first concrete steel reinforcement frame through a first connecting rod, the end part of the force transmission rod is embedded in the buffer sleeve, and a piston matched with the inner cavity of the buffer sleeve is arranged at the embedded end of the force transmission rod, the other end of the force transmission rod is provided with a buffer mechanism connected with the second concrete steel reinforcement frame, the buffer mechanism comprises a first clamping sleeve fixed on the force transmission rod and a second clamping sleeve sleeved outside the first clamping sleeve, the second clamping sleeve is connected with the second concrete steel reinforcement frame, a sliding groove is formed on the contact surface of the second clamping sleeve and the first clamping sleeve, the outer surface of the first clamping sleeve is provided with a protrusion matched and connected with the sliding groove, the protrusion is slidingly embedded in the sliding groove, and the two ends of the protrusion are connected with the two end faces of the sliding groove through compression springs.

[0010] Further technical scheme of the application: a plurality of force transmission structures are installed horizontally side by side at the expansion joint, the expansion joint plates of the plurality of force transmission structures are connected as a whole, and the length of the plurality of force transmission structures is matched with the length of the expansion joint, and the force transmission rods of the plurality of force transmission structures are arranged at the same height.

[0011] Further technical scheme of the application: the first end head formwork and the second end head formwork are both assembled by upper and lower block formworks, semicircular grooves are formed on the butt joint parts of the upper and lower block formworks, the lower block formwork is first supported, the slot opening of the semicircular groove of the lower block formwork faces upward, the force transmission rod is arranged in the semicircular groove of the lower block formwork, then the upper block formwork is supported, and the semicircular grooves of the upper and lower block formworks butt joint to clamp the force transmission rod.

[0012] The preferred technical scheme of the present application is as follows: the first sleeve and the second sleeve are both cylindrical sleeves, the first sleeve is fixed at the end of the force transmission rod and connected with the second concrete reinforcing frame through the second connecting rod, the second sleeve is movably sleeved outside the first sleeve, the sliding groove is an annular groove or a plurality of equidistantly distributed horizontal sliding grooves, when the sliding groove is the annular groove, the protruding block is an annular protruding block arranged in the middle of the first sleeve, a plurality of compression springs are equidistantly arranged at each end of the protruding block, when the sliding groove is the plurality of equidistantly distributed horizontal sliding grooves, a plurality of protruding blocks are correspondingly arranged in the middle of the first sleeve, each protruding block is slidably embedded in the corresponding sliding groove, and a set of compression springs is arranged at both ends of the sliding block, respectively, a thimble is arranged at the position of the protruding block provided with the compression spring, one end of the compression spring is sleeved outside the thimble, and the other end is fixed on the inner wall of the sliding groove, the protruding block slides horizontally along the sliding groove, and the horizontal sliding distance is matched with the compression length of the compression spring and the width of the expansion joint.

[0013] The preferred technical scheme of the present application is as follows: the buffer sleeve is a hollow cylinder with one end closed and the other end provided with a through hole matched with the diameter of the force transmission rod, the force transmission rod extends into the cylinder through the through hole, the outer diameter of the piston is matched with the diameter of the hollow area of the buffer sleeve, and a buffer rubber pad layer is arranged on each end surface of the piston, and a plurality of damping holes are arranged on the circumferential part of the piston.

[0014] The preferred technical scheme of the present application is as follows: an asphalt layer is coated on the surface of the connecting end of the force transmission rod and the buffer sleeve, and a film is wrapped on the surface of the asphalt layer.

[0015] The preferred technical scheme of the present application is as follows: the expansion joint plate is a foam plate or a rubber plate or an elastic plate provided with a buffer spring in the middle, and the expansion joint plate is located at the middle position of the force transmission rod; the width of the expansion joint is 2.5-3.5 cm, and the thickness of the expansion joint plate after compression is less than 0.5 cm.

[0016] In order to achieve the above technical purpose, the present application also provides a construction method of the continuous reinforced concrete pavement expansion joint force transmission structure, and the specific construction steps are as follows:

[0017] S1. The steel reinforcement frame of the concrete slab is bound, and then the end template of the concrete slab is erected, the end template is assembled by upper and lower block templates, the butt joint parts of the upper and lower block templates are respectively provided with semicircular grooves, the lower block template is first erected, and the slot opening of the semicircular groove faces upward;

[0018] S2. The force transmission structure is installed at the expansion joint, the expansion joint plate is arranged at the reserved expansion joint position, the two ends of each force transmission rod extend into the first concrete reinforcing frame and the second concrete reinforcing frame on the two sides of the expansion joint, the two ends of the force transmission rod are arranged in the semicircular grooves on the end templates on the two sides of the expansion joint, and the buffer sleeve and the buffer mechanism at the two ends of the force transmission rod are respectively fixed on the first concrete reinforcing frame and the second concrete reinforcing frame;

[0019] S3. Install the upper block template of the end template, and fix the dowel bar through the semicircular groove on the upper block template, and concrete can be poured in the area of the first concrete reinforcement frame and the second concrete reinforcement frame, and the end template can be removed after the initial setting of the concrete, and the installation of the expansion joint dowel structure is completed.

[0020] The length of the expansion joint plate of the dowel structure in the S2 step matches the length of the expansion joint, and a plurality of dowel bars are provided, the plurality of dowel bars are arranged at the same height of the expansion joint plate, a buffer sleeve and a buffer mechanism are respectively arranged at both ends of each dowel bar, and the buffer sleeve and the buffer mechanism of each dowel bar are welded and fixed with the corresponding side concrete reinforcement frame through a connecting rod.

[0021] The end of the dowel bar is coated with pitch and covered with a film, and the buffer sleeve is sleeved outside the film; the expansion joint plate is directly installed after being fixed with the dowel bar, or the expansion joint plate is cut into two parts, the lower part of the expansion joint plate is installed first, and after the dowel bar is installed and the concrete is poured, the upper part of the expansion joint plate is filled.

[0022] The beneficial effects of the present application are:

[0023] (1) The dowel structure in the present application is fixed through the concrete reinforcement frame and the end template during installation, which ensures the stability of the concrete and avoids displacement of the template and deformation of the dowel bar during concrete pouring.

[0024] (2) The dowel bar of the present application is provided with a buffer sleeve at one end and a buffer mechanism at the other end, and the two ends of the dowel bar are not fixedly connected with the poured concrete plate, so that the dowel bar can shrink with the expansion of the concrete during the expansion of the concrete, and the buffer mechanism can play a role in moving and buffering during the expansion of the concrete, thereby improving the transmission effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The structure of the present application is shown in the figure;

[0026] Figure 2 The connection structure of the dowel bar and the buffer sleeve of the present application is shown in the figure;

[0027] Figure 3 The internal connection structure of the dowel bar and the buffer sleeve of the present application is shown in the figure;

[0028] Figure 4 The piston cross section of the present application is shown in the figure;

[0029] Figure 5 The internal structure of the buffer mechanism of the present application is shown in the figure;

[0030] Figure 6 Fig. 4 is a cross-sectional view of the buffer mechanism of the present application.

[0031] In the figure, reference numerals: 1 - first concrete steel frame; 2 - second concrete steel frame; 3 - force transmission rod; 4 - expansion joint plate; 5 - buffer sleeve; 501 - piston; 502 - damping hole; 6 - asphalt layer; 7 - film; 8 - buffer mechanism; 4801 - first clamping sleeve; 802 - second clamping sleeve; 803 - sliding groove; 804 - protrusion; 805 - thimble; 806 - second compression spring, 807 - second connecting rod; 9 - first connecting rod; 10 - expansion joint; 11 - first end template; 12 - second end template. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0033] The expansion joint force transmission structure of the continuous reinforced concrete pavement provided by the embodiment is installed at the expansion joint 10 before the concrete pouring after the steel frame binding of the concrete slab and the erection of the end template. The force transmission structure comprises a force transmission rod 3 and an expansion joint plate 4 fixed at the middle part of the force transmission rod 3. A plurality of force transmission structures are installed side by side in the horizontal direction at the expansion joint 10, and the expansion joint plates 4 of the plurality of force transmission structures are connected as a whole and have a length matching the length of the expansion joint 10. The force transmission rods 3 of the plurality of force transmission structures are arranged at the same height, and the expansion joint plate 4 is located at the middle part of the force transmission rod 3. The expansion joint plate 4 is placed in the expansion joint 10, and perforations are formed on the first end template 11 and the second end template 12 on both sides of the expansion joint 10. The first end template 11 and the second end template 12 are both assembled by upper and lower block templates, and semicircular grooves are formed at the butt joint parts of the upper and lower block templates. The two semicircular grooves are butt jointed to form a perforation matching the force transmission rod 3. During the template supporting process, the lower block template is first supported, the slot opening of the semicircular groove of the lower block template faces upward, and the force transmission rod 3 is placed in the semicircular groove of the lower block template. Then, the upper block template is supported, and the semicircular grooves of the upper and lower block templates butt joint to clamp the force transmission rod 3. The expansion joint plate 4 is a foam plate or a rubber plate or an elastic plate provided with a buffer spring at the middle part. The width of the expansion joint is 2.5-3.5 cm, which satisfies the expansion amount of the concrete slab. The thickness of the expansion joint plate 4 after compression is less than 0.5 cm. During the expansion process of the concrete slab, the expansion joint plate 4 will be compressed, which neither affects the expansion of the concrete nor completely fills the gap.

[0034] An embodiment provides a force transfer structure for expansion joints in continuously reinforced concrete pavement, such as... Figure 1 As shown, both ends of each force transmission rod 3 pass through the first end template 11 and the second end template 12, respectively, and extend into the first concrete reinforcement frame 1 and the second concrete reinforcement frame 2 on both sides of the expansion joint 10. One end of each force transmission rod 3 is provided with a buffer sleeve 5, which is fixed to the corresponding first concrete reinforcement frame 11 by a first connecting rod 9. The end of the force transmission rod 3 is embedded in the buffer sleeve 5, and a piston 501 matching the inner cavity of the buffer sleeve 5 is provided at its embedded end. Figure 2 and Figure 3 As shown, the buffer sleeve 5 is a hollow cylinder with one end closed and the other end having a through hole that matches the diameter of the force transmission rod 3. The force transmission rod 3 extends into the cylinder through the through hole. The outer diameter of the piston 501 matches the diameter of the hollow area of ​​the buffer sleeve 5. Buffer rubber pads are provided on both ends of the piston 501. Multiple damping holes 502 are provided on the circumference of the piston 501. An asphalt layer 6 is coated on the surface of the connection between the force transmission rod 3 and the buffer sleeve 5, and a thin film 7 is wrapped around the surface of the asphalt layer 6 to prevent rust.

[0035] An embodiment provides a force transfer structure for expansion joints in continuously reinforced concrete pavement, such as... Figure 1 , Figure 5 and Figure 6 As shown, the other end of the force transmission rod 3 is provided with a buffer mechanism 8 connected to the second concrete steel frame 2. The buffer mechanism 8 includes a first sleeve 801 fixedly sleeved on the force transmission rod 3 and a second sleeve 802 sleeved outside the first sleeve 801. Both the first sleeve 801 and the second sleeve 802 are cylindrical sleeves. The first sleeve 801 is fixed to the end of the force transmission rod 3 and connected to the second concrete steel frame 2 through a second connecting rod 807. The second sleeve 802 is movably sleeved outside the first sleeve 801. A groove 803 is provided on the contact surface between the second sleeve 802 and the first sleeve 801. The outer surface of the first sleeve 801 is provided with a protrusion 804 that cooperates with the groove 803. The protrusion 804 is slidably embedded in the groove 803, and the two ends of the protrusion 804 are respectively connected to the two end faces of the groove 803 through compression springs 806. The groove 803 is an annular groove or multiple equally spaced horizontal grooves 803. When the groove 803 is an annular groove, such as Figure 6 As shown, the protrusion 804 is an annular protrusion located in the middle of the first sleeve 801, and multiple sets of compression springs 806 are equidistantly arranged at each end of the protrusion 804; when the slide groove 803 is a plurality of equidistantly distributed horizontal slide grooves 803, such as Figure 5As shown, a plurality of protrusions 804 are arranged in the middle of the first sleeve 801, each protrusion 804 is slidingly embedded in a corresponding sliding slot, and a set of compression springs 806 is arranged at both ends of the sliding block 804; a thimble 805 is arranged at the position of the protrusion 804 where the compression spring 806 is arranged, one end of the compression spring 806 is sleeved outside the thimble 805, and the other end is fixed on the inner wall of the sliding slot 803; the protrusion 804 slides horizontally along the sliding slot 803, and the horizontal sliding distance is adapted to the compression length of the compression spring 806 and the width of the expansion joint 10.

[0036] The construction method of the expansion joint force transmission structure of the continuous reinforced concrete pavement provided by the embodiment has the characteristics that the specific construction steps are as follows.

[0037] S1. The steel reinforcement frame of the concrete slab is bound, and then the end template of the concrete slab is supported, the end template is assembled by upper and lower block templates, semicircular grooves are arranged at the abutting portions of the upper and lower block templates, the lower block template is first supported, and the slot opening of the semicircular groove faces upward; the upper and lower block templates of the end template are respectively provided with semicircular grooves matched with the number of force transmission rods.

[0038] S2. The force transmission structure is installed at the expansion joint, the length of the expansion joint plate of the force transmission structure matches the length of the expansion joint, a plurality of force transmission rods are arranged, the plurality of force transmission rods are arranged at the same height of the expansion joint plate, a buffer sleeve and a buffer mechanism are arranged at both ends of each force transmission rod, one end of the force transmission rod connected with the buffer sleeve is coated with pitch and covered with a film, and the expansion joint plate and the force transmission rod are fixed and integrated and then directly installed; during the installation process, the expansion joint plate 4 is placed at the reserved expansion joint position, both ends of each force transmission rod 3 extend into the first concrete steel reinforcement frame 1 and the second concrete steel reinforcement frame 2 on both sides of the expansion joint, the force transmission rod 3 is arranged in the semicircular groove on the end template on both sides of the expansion joint, and the buffer sleeve 5 and the buffer mechanism 8 at both ends of the force transmission rod are respectively welded and fixed on the first concrete steel reinforcement frame 1 and the second concrete steel reinforcement frame 2 through connecting rods;

[0039] S3. The upper block template of the end template is installed, the force transmission rod is fixed and clamped through the semicircular groove on the upper block template, and concrete can be poured in the area of the first concrete steel reinforcement frame 1 and the second concrete steel reinforcement frame 2, after the concrete is initially cured, the end template can be removed, and the installation of the force transmission structure at the expansion joint is completed.

[0040] The application is provided with a force transmission rod 3, a caulking plate 4 and a buffer sleeve 5, the middle position of the force transmission rod 3 passes through the caulking plate 4, the two ends of the force transmission rod 3 are connected with the reinforced concrete frame respectively, and the problems of the fixed force transmission rod 3 and deformation do not occur in the process of pouring concrete. After pouring the concrete, the two ends of the force transmission rod 3 are connected with the concrete block through the buffer component, which can ensure that the force transmission rod 3 can follow the small range displacement of the concrete expansion in the process of concrete expansion, realize self-shrinkage, the displacement distance meets the distance of the concrete expansion, the deformation of the force transmission rod 3 does not occur in the process of concrete displacement, and the force transmission effect can be improved.

[0041] The above is only the preferred specific embodiment of the application, but the protection scope of the application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A continuously reinforced concrete pavement expansion joint force transmission structure, installed at the expansion joint (10) after the steel reinforcement frame of the concrete slab is tied and the end formwork is erected, and before concrete pouring, characterized in that: The force transmission structure includes a force transmission rod (3) and an expansion joint plate (4) fixed in the middle of the force transmission rod (3). The expansion joint plate (4) is placed inside the expansion joint (10). Perforations are correspondingly opened on the first end template (11) and the second end template (12) on both sides of the expansion joint (10). The two ends of the force transmission rod (3) pass through the first end template (11) and the second end template (12) respectively, extending into the first concrete reinforcement frame (1) and the second concrete reinforcement frame (2) on both sides of the expansion joint (10). One end of the force transmission rod (3) is provided with a buffer sleeve (5). The buffer sleeve (5) is fixed to the corresponding first concrete reinforcement frame (1) by a first connecting rod (9). The end of the force transmission rod (3) is embedded in the buffer sleeve (5), and a groove matching the inner cavity of the buffer sleeve (5) is provided at its embedded end. Piston (501); The other end of the force transmission rod (3) is provided with a buffer mechanism (8) connected to the second concrete steel frame (2). The buffer mechanism (8) includes a first sleeve (801) fixedly sleeved on the force transmission rod (3) and a second sleeve (802) sleeved outside the first sleeve (801). The second sleeve (802) is connected to the second concrete steel frame (2). A groove (803) is provided on the contact surface between the second sleeve (802) and the first sleeve (801). The outer surface of the first sleeve (801) is provided with a protrusion (804) that cooperates with the groove (803). The protrusion (804) is slidably embedded in the groove (803), and the two ends of the protrusion (804) are respectively connected to the two end faces of the groove (803) through compression springs (806).

2. The force transfer structure of expansion joint in continuously reinforced concrete pavement according to claim 1, characterized in that: Multiple force transmission structures are installed side by side in the horizontal direction at the expansion joint (10), and the expansion joint plates (4) of the multiple force transmission structures are connected as one unit, and their lengths match the length of the expansion joint (10). The force transmission rods (3) of the multiple force transmission structures are set at the same height.

3. A continuously reinforced concrete pavement expansion joint force transfer structure according to claim 1 or 2, characterized in that: The first end template (11) and the second end template (12) are both assembled from upper and lower template blocks. The upper and lower template blocks are respectively provided with semi-circular grooves at the joint. The lower template block is first supported with its semi-circular groove opening facing upwards, and the force transmission rod (3) is placed in the semi-circular groove on the lower template block. Then the upper template block is supported, and the semi-circular grooves of the upper and lower template blocks are joined to lock the force transmission rod (3).

4. A continuously reinforced concrete pavement expansion joint force transfer structure according to claim 1 or 2, characterized in that: Both the first sleeve (801) and the second sleeve (802) are cylindrical sleeves. The first sleeve (801) is fixed to the end of the force transmission rod (3) and connected to the second concrete reinforcement frame (2) through the second connecting rod (807). The second sleeve (802) is movably sleeved outside the first sleeve (801). The groove (803) is an annular groove or multiple equally spaced horizontal grooves (803). When the groove (803) is an annular groove, the protrusion (804) is set on the first... The annular protrusion in the middle of the sleeve (801) has multiple sets of compression springs (806) equidistantly provided at each end of the protrusion (804); when the slide groove (803) is a plurality of equidistantly distributed horizontal slide grooves (803), multiple protrusions (804) are correspondingly provided in the middle of the first sleeve (801), each protrusion (804) slides into the corresponding slide groove, and a set of compression springs (806) is provided at each end of the protrusion (804); at the position where the compression springs (806) are provided on the protrusion (804) there are corresponding... The ejector pin (805) has one end of the compression spring (806) sleeved on the outside of the ejector pin (805) and the other end fixed to the inner wall of the slide groove (803); the protrusion (804) slides horizontally along the slide groove (803), and the distance of horizontal sliding is adapted to the compression length of the compression spring (806) and the width of the expansion joint (10).

5. A continuously reinforced concrete pavement expansion joint force transfer structure according to claim 1 or 2, characterized in that: The buffer sleeve (5) is a hollow cylinder with one end closed and the other end having a through hole that matches the diameter of the force transmission rod (3). The force transmission rod (3) extends into the cylinder through the through hole. The outer diameter of the piston (501) matches the diameter of the hollow area of ​​the buffer sleeve (5). Buffer rubber pads are provided on both ends of the piston (501). Multiple damping holes (502) are provided on the circumference of the piston (501).

6. A continuously reinforced concrete pavement expansion joint force transmission structure according to claim 1 or 2, characterized in that: An asphalt layer (6) is applied to the surface of the connection end between the force transmission rod (3) and the buffer sleeve (5), and a thin film (7) is wrapped around the surface of the asphalt layer (6).

7. A continuously reinforced concrete pavement expansion joint force transfer structure according to claim 1 or 2, characterized in that: The expansion joint plate (4) is a foam board or a rubber board or an elastic plate with a buffer spring in the middle. The expansion joint plate (4) is located in the middle of the force transmission rod (3). The width of the expansion joint is 2.5 to 3.5 cm, and the thickness of the expansion joint plate (4) after compression is less than 0.5 cm.

8. A construction method for a continuously reinforced concrete pavement expansion joint load transfer structure according to any one of claims 1 to 7, characterized in that... The specific construction steps are as follows: S1. Tie the steel reinforcement frame of the concrete slab, and then set up the end formwork of the concrete slab. The end formwork is assembled from upper and lower formwork blocks. Semi-circular grooves are opened at the joint of the upper and lower formwork blocks. The lower formwork block is set up first, with the opening of its semi-circular groove facing upward. S2. Install a force transmission structure at the expansion joint, place the expansion joint plate at the reserved expansion joint position, and extend the two ends of the force transmission rod into the first concrete reinforcement frame and the second concrete reinforcement frame on both sides of the expansion joint respectively. The two ends of the force transmission rod are mounted in the semi-circular grooves on the end templates on both sides of the expansion joint, and the buffer sleeves and buffer mechanisms at both ends of the force transmission rod are fixed on the first concrete reinforcement frame and the second concrete reinforcement frame respectively. S3. Install the upper template of the end template, and fix the dowel bar in place through the semi-circular groove on the upper template. Concrete can be poured in the area of ​​the first concrete reinforcement frame and the second concrete reinforcement frame. After the concrete has initially set, the end template is removed to complete the installation of the force transmission structure at the expansion joint.

9. The construction method of a continuously reinforced concrete pavement expansion joint force transfer structure according to claim 8, characterized in that: In step S2, the length of the expansion joint plate of the force transmission structure matches the length of the expansion joint, and multiple force transmission rods are provided. The multiple force transmission rods are arranged at the same height on the expansion joint plate. Each force transmission rod has a buffer sleeve and a buffer mechanism at both ends. The buffer sleeve and buffer mechanism of each force transmission rod are welded and fixed to the corresponding side concrete reinforcement frame through connecting rods. In step S1, the upper and lower templates of the end template are respectively provided with semi-circular grooves that match the number of force transmission rods.

10. A construction method for a continuously reinforced concrete pavement expansion joint force transfer structure according to claim 8, characterized in that: One end of the dowel bar is coated with asphalt and covered with a thin film, and a buffer sleeve is fitted over the film. The expansion joint plate is directly installed after being fixed to the dowel bar, or the expansion joint plate is cut into two parts, the lower part of the expansion joint plate is installed first, the dowel bar is installed and the concrete is poured, and then the upper part of the expansion joint plate is filled.

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