Roadbed widening splicing structure

Abstract

The application provides a roadbed widening splicing structure, and relates to the technical field of road engineering. It comprises a support assembly and a filling material. The support assembly comprises a base plate strip, a far road pile and a prefabricated plate. A stepped surface is formed on the side of the roadbed away from the road. The base plate strip is arranged on the stepped surface along the length direction of the road. One side of the prefabricated plate is arranged on the base plate strip. The bottom end of the far road pile is inserted into the ground. One side of the prefabricated plate away from the road is arranged on the far road pile. The filling material is arranged in the gap between the top of the prefabricated plate and the roadbed and forms a filling layer. The top surface of the filling layer is flush with the road surface. The application has the advantage of short construction period.

Description

Technical Field

[0001] This application relates to the field of road engineering technology, and in particular to a roadbed widening and splicing structure. Background Technology

[0002] With the development of the highway network, many existing roads can no longer meet current needs, and many roads in China are facing the need to be widened, requiring the use of roadbed widening and splicing structures to widen the roads.

[0003] Existing roadbed widening and splicing structures generally include a pavement layer and multiple anti-sinking layers. After excavating the side of the roadbed to be widened to create a stepped surface, workers first lay geogrid along the length of the road on the bottom stepped surface. Then, a thin layer of soil is covered on the geogrid and compacted to form an anti-sinking layer flush with the second stepped surface of the roadbed. New geogrid is then laid on this anti-sinking layer and the second stepped surface of the roadbed, covered with a thin layer of compacted soil, and this process is repeated until anti-sinking layers are laid on each stepped surface. Finally, asphalt is laid on the top anti-sinking layer to form a pavement layer flush with the old pavement. However, if there is insufficient or excessive fill in a certain area during the laying of the anti-sinking layer, the roadbed widening and splicing structure is prone to subsidence and cracking, requiring excavation and rework. Therefore, the existing roadbed widening and splicing structure often requires a lot of time to compact the anti-sinking layer during construction, making the existing roadbed widening and splicing structure time-consuming, labor-intensive, and with a long construction period.

[0004] Therefore, there is a need to provide a roadbed widening and splicing structure. Utility Model Content

[0005] To address the problems of time-consuming, labor-intensive, and lengthy construction periods associated with existing roadbed widening and splicing structures, this application provides a roadbed widening and splicing structure.

[0006] This application provides a roadbed widening and splicing structure, which adopts the following technical solution: it includes a support component and a filler material. The support component includes a pad strip, a remote road pile, and a precast slab. A stepped surface is provided on the side of the roadbed away from the road. The pad strip is provided on the stepped surface along the length direction of the road. One side of the precast slab is placed on the pad strip. The bottom end of the remote road pile is inserted into the ground. The side of the precast slab away from the road is placed on the remote road pile. The filler is placed on top of the precast slab and in the gap between the precast slab and the roadbed to form a filling layer, and the top surface of the filling layer is flush with the road surface.

[0007] By adopting the above technical solution, the pad strips of the support component are set on the step surface along the length of the road. One side of the precast slab rests on the pad strips, and the other side rests on the remote road piles inserted into the ground at the bottom. The support component provides stable support for the precast slab. On this basis, filler material is then filled to form a filling layer. This avoids the problems of subsidence and cracking caused by uneven filling and insufficient compaction during the laying of the anti-subsidence layer in the existing technology. It also eliminates the need to spend a lot of time compacting the anti-subsidence layer, thereby saving time and manpower and shortening the construction period.

[0008] Specifically, the remote pile includes a support column, a shear member, and a column cap. The bottom end of the support column is inserted into the ground. The shear member is fixedly connected to the top of the support column. A socket hole is opened on the bottom surface of the column cap. The socket hole is fitted onto the shear member and abuts against the top of the support column through the edge of the socket hole. The column cap can be connected to the shear member by filling the gap between the shear member and the socket hole with concrete. The precast slab is erected on the column cap.

[0009] By adopting the above technical solution, the bottom end of the support column is inserted into the ground, which can stably support the entire remote pile; the shear member is fixed at the top of the support column, and the column cap is fitted onto the shear member and connected to the shear member through the concrete filling gap, which enhances the connection stability and shear resistance between the column cap and the support column; the precast slab is erected on the column cap, so that the support component can stably support the precast slab, thereby providing stable support for the filling layer, reducing the subgrade settlement and cracking caused by soil compaction problems, shortening the construction period, and improving the efficiency and quality of the subgrade widening splicing structure construction.

[0010] Furthermore, the shear-resistant member is a U-shaped restraint rib, both ends of which are welded to the support column, and the protruding part of the U-shaped restraint rib protrudes upward.

[0011] By adopting the above technical solution, the structure in which the two ends of the U-shaped restraint bar are welded to the support column and the protrusion is upward can enhance the resistance of the remote road pile to horizontal shear force, improve the stability of the connection between the support column and the column cap, and thus improve the stability and bearing capacity of the entire roadbed widening splicing structure.

[0012] Furthermore, the U-shaped restraint rib includes an upper rib and a lower rib. The length direction of the upper rib is perpendicular to the length direction of the lower rib, and the angle between the length direction of the upper rib and the length direction of the road is 45°. The protrusion of the lower rib is located between the protrusion of the upper rib and the support column.

[0013] By adopting the above technical solution, the U-shaped restraint reinforcement consists of an upper reinforcement and a lower reinforcement, with the length direction of the upper reinforcement perpendicular to the length direction of the lower reinforcement. The angle between the length direction of the upper reinforcement and the length direction of the road is 45°. The protruding part of the lower reinforcement is located between the protruding part of the upper reinforcement and the support column. This structure enables the U-shaped restraint reinforcement to provide restraint in multiple directions, enhancing the overall shear resistance and stability of the road pile, thereby improving the stability of the entire roadbed widening and splicing structure and reducing structural deformation and damage caused by external forces.

[0014] Furthermore, the remote road post also includes four flip covers. The top of the support column has four accommodating slots evenly spaced around its central axis. Each accommodating slot corresponds to one of the flip covers. The side of each flip cover away from the central axis of the support column is hinged to the edge of the corresponding accommodating slot. The side of each flip cover away from the central axis of the support column can rotate around the hinge axis of the flip cover to the central axis of the support column and be fastened to the corresponding accommodating slot opening. The end of the lower rib is welded to the bottom wall of the accommodating slot. When the flip cover is fastened to the accommodating slot opening, the end of the upper rib is welded to the top plate surface of the flip cover.

[0015] By adopting the above technical solutions, since U-shaped restraint bars are generally prefabricated components with uniform specifications produced in factories, and when the upper and lower bars are assembled, the protruding part of the upper bar needs to be located above the protruding part of the lower bar. When both the upper and lower bars need to be welded to the top of the support column, workers need to use a large number of weld plates to weld a layer of bosses between the end of the upper bar and the top of the support column to support the upper bar. Alternatively, on the construction site, based on data such as the diameter of the lower bar and the bending angle of the protruding part, steel bar bending equipment is used to heat and bend the steel bar on-site to form an upper bar that matches the lower bar. Therefore, the installation of U-shaped restraint bars is either time-consuming and labor-intensive. Otherwise, a lot of welding material would be wasted; however, the design of the flap and the receiving groove allows workers to open the flaps of the two opposite receiving grooves upwards and weld the ends of the lower reinforcement to the bottom walls of the two receiving grooves when welding the lower reinforcement. When welding the upper reinforcement, workers can close the flaps of the other two receiving grooves downwards and weld the ends of the upper reinforcement to the two flaps. In this way, the design of the flap and the receiving groove can create a height difference between the upper and lower reinforcements, so that U-shaped restraint reinforcements of the same specifications can also be combined to form shear-resistant components. This makes the construction of the roadbed widening splicing structure time-saving and labor-saving, and the consumption of welding material is not large.

[0016] Furthermore, the flip cover includes a connecting plate, a welding plate, and a pad. One side of the connecting plate is hinged to the groove edge of the receiving groove away from the central axis of the support column. The other side of the connecting plate is hinged to one end of the welding plate. A screw hole is provided on the bottom surface of the welding plate. The pad is provided with a stud that matches the screw hole, and the pad can be detachably connected to the welding plate by screwing the stud and the screw hole. When the flip cover is fastened at the groove opening of the receiving groove, the pad is abutted between the bottom wall of the receiving groove and the welding plate, and the end of the upper rib is welded to the top surface of the welding plate.

[0017] By adopting the above technical solution, since the diameter of the U-shaped restraint ribs comes in various specifications, the detachable setting of the pads allows workers to change the height difference between the top surface of the welding plate and the bottom wall of the receiving groove by replacing pads of different specifications when the flip cover is fastened to the receiving groove opening, thereby enabling the flip cover to adapt to U-shaped restraint ribs of different specifications.

[0018] Furthermore, the remote pile also includes a support clamp and a constraint sleeve. The support clamp is attached to the column body of the support column. The bottom opening of the constraint sleeve is fitted onto the support column and abuts against the top of the support clamp. The top opening of the constraint sleeve is higher than the top of the support column, and the top opening of the constraint sleeve abuts against the bottom of the column cap, forming a pouring space between the inner wall of the sleeve hole, the inner wall of the constraint sleeve, and the top of the support column. The top of the column cap has a grouting hole leading to the pouring space.

[0019] By adopting the above technical solution, before the concrete is poured in the pouring space, the constraint sleeve can be fixed on the support column by the support clamp. After the concrete poured in the pouring space has solidified, the worker can remove the support clamp from the support column. The constraint sleeve, column cap, shear member and support column can be connected by the concrete in the pouring space to form an integrated structure.

[0020] Furthermore, the remote road post also includes a buffer element, which is disposed between the top opening of the constraint sleeve and the bottom of the post cap.

[0021] By adopting the above technical solution, the buffer can form a buffer between the top opening of the sleeve tube and the bottom of the column cap, so that the buffer can absorb the dynamic impact energy of the vehicle through elastic deformation, and can also adapt to the differential settlement (±5mm) and temperature deformation (±15mm) of the old and new roadbeds, eliminating misalignment and internal force accumulation.

[0022] In summary, this application includes the following beneficial technical effects: The system includes support components and filler material. The support components include pad strips, remote road piles, and precast slabs. A stepped surface is provided on the side of the roadbed away from the road. The pad strips are placed on the stepped surface along the length of the road. One side of the precast slab is placed on the pad strips. The bottom end of the remote road pile is inserted into the ground. The side of the precast slab away from the road is placed on the remote road pile. Filler material is placed on the top of the precast slab and in the gap between the precast slab and the roadbed to form a filler layer. The top surface of the filler layer is flush with the road surface. The pad strips of the support components are placed on the stepped surface along the length of the road. One side of the precast slab is placed on the pad strips, and the other side is placed on the remote road pile with its bottom end inserted into the ground. The support components provide stable support for the precast slab. On this basis, filler material is then filled to form a filler layer. This avoids the problems of subsidence and cracking caused by uneven filling and insufficient compaction during the laying of the anti-subsidence layer in the existing technology. It also eliminates the need to spend a lot of time compacting the anti-subsidence layer, thus saving time and manpower and shortening the construction period. Attached Figure Description

[0023] Figure 1 This is a perspective view of a roadbed widening and splicing structure according to this application, showing only a section of road and a section of the roadbed widening and splicing structure, without showing the filler material; Figure 2 yes Figure 1 Front view; Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the AA direction; Figure 4 yes Figure 3 A schematic enlarged view of region B, showing the shear-resistant component; Figure 5 It is along Figure 3 A schematic cross-sectional view taken along the CC direction, showing only a portion of the precast slabs and supporting columns; Figure 6 yes Figure 5 A schematic enlarged view of area D in the middle, showing the flip cover.

[0024] Reference numerals: 1. Road; 11. Step surface; 2. Support component; 21. Pad strip; 22. Remote road pile; 221. Support column; 222. Shear member; 2221. Top reinforcement; 2222. Bottom reinforcement; 223. Column cap; 2231. Grouting hole; 224. Flip cover; 2241. Connecting plate; 2242. Welded plate; 2243. Pad block; 225. Support clamp; 226. Constraint sleeve; 227. Buffer; 23. Precast slab. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-6 Further explanation: See Figure 1 , Figure 2and Figure 3 The roadbed widening splicing structure provided in this application includes: filler material (not shown in the figure) and support component 2. The filler material can be micro-expansion concrete. The support component 2 includes pad strips 21, multiple remote road piles 22 and multiple precast slabs 23. A stepped surface 11 is provided on the side of the roadbed away from the road 1. The pad strips 21 are set on the stepped surface 11 along the length direction of the road 1. The precast slabs 23 correspond one-to-one with the remote road piles 22. One side of each precast slab 23 is supported on the pad strips 21, and the side of each precast slab 23 away from the road 1 is supported on a corresponding remote road pile 22. The filler material is placed on the top of the precast slab 23 and in the gap between the precast slab 23 and the roadbed to form a filling layer. The top surface of the filling layer is flush with the road surface of the road 1.

[0026] See Figure 4 , Figure 5 and Figure 6 The remote road pile 22 includes a support column 221, a shear-resistant member 222, a support clamp 225, a restraint sleeve 226, a buffer member 227, a column cap 223, and four flip covers 224. The bottom end of the support column 221 is inserted into the ground. The shear-resistant member 222 is fixedly connected to the top end of the support column 221. The bottom surface of the column cap 223 has a sleeve hole. The shear-resistant member 222 includes three upper ribs 2221 and three lower ribs 2222. Both the upper ribs 2221 and the lower ribs 2222 can be U-shaped restraint ribs. The top of the support column 221 has four receiving slots at equal intervals around the central axis of the support column 221. The receiving slots correspond one-to-one with the flip covers 224. Each flip cover 224 includes a connecting plate 2241, a welding plate 2242, and a pad 2243. One side of the connecting plate 2241 is hinged to the receiving slot. On the side of the groove away from the central axis of the support column 221, the other side of the connecting plate 2241 is hinged to one end of the welding plate 2242. The bottom plate surface of the welding plate 2242 is provided with a screw hole. The pad 2243 is provided with a stud that matches the screw hole. The pad 2243 can be detachably connected to the welding plate 2242 by screwing the stud and the screw hole. When the flip cover 224 is fastened at the groove opening of the receiving groove, the pad 2243 is abutted between the bottom wall of the receiving groove and the welding plate 2242. The end of the upper rib 2221 is welded to the top plate surface of the welding plate 2242. This allows the worker to change the height difference between the top surface of the welding plate 2242 and the bottom wall of the receiving groove by replacing the pad 2243 of different specifications. This allows the flip cover 224 to be adapted to U-shaped restraint ribs of different specifications.

[0027] See Figure 4 , Figure 5 and Figure 6The support clamp 225 is attached to the column body of the support column 221. The bottom opening of the constraint sleeve 226 is fitted onto the support column 221 and abuts against the top of the support clamp 225. The top opening of the constraint sleeve 226 is higher than the top of the support column 221, and the top opening of the constraint sleeve 226 abuts against the bottom of the column cap 223, forming a pouring space between the inner wall of the sleeve hole, the inner wall of the constraint sleeve 226, and the top of the support column 221. The top of the column cap 223 has a grouting hole leading to the pouring space. 2231; The buffer 227 is disposed between the top opening of the constraint sleeve 226 and the bottom of the post cap 223. The buffer 227 can be made of rubber or high modulus modified polymer material so that the buffer 227 can form a buffer between the top opening of the constraint sleeve and the bottom of the post cap 223. Thus, the buffer 227 can absorb the dynamic impact energy of the vehicle through elastic deformation, and can also adapt to the differential settlement (±5mm) and temperature deformation (±15mm) of the old and new roadbeds, eliminating misalignment and internal force accumulation.

[0028] The installation process of the remote road bollard 22 in this application is as follows: First, the support column 221 (usually formed by welding multiple sections of PHC pipe piles) is driven into the ground by a heavy hammer and a light tap, and the verticality of the pipe pile is monitored in real time by a theodolite. The exposed height of the first section of the pipe pile is controlled at about 1.5 meters to facilitate subsequent pile splicing construction. Then, U-shaped restraint bars are installed on the top of the support column 221. Since the U-shaped restraint bars are generally prefabricated components with standardized specifications produced in the factory, and the protrusion of the upper bar 2221 needs to be positioned above the protrusion of the lower bar 2222 when the upper bar 2221 and lower bar 2222 are combined, when both the upper bar 2221 and lower bar 2222 need to be welded to the top of the support column 221, workers need to use a large number of welds to create a layer of bosses between the end of the upper bar 2221 and the top of the support column 221 to support the upper bar 2221. Alternatively, on-site, based on data such as the diameter of the lower bar 2222 and the bending angle of the protrusion, steel bars can be heated and bent on-site using steel bar bending equipment to match the lower bar 2222. The square reinforcement 2221 makes the installation of U-shaped restraint reinforcement either time-consuming and labor-intensive, or wastes a lot of welding material. However, the design of the flap 224 and the receiving groove allows the worker to open the flaps 224 of the two opposite receiving grooves upwards and weld the ends of the lower reinforcement 2222 to the bottom wall of the two receiving grooves when welding the lower reinforcement 2222. When welding the upper reinforcement 2221, the worker can close the flaps 224 of the other two receiving grooves downwards and weld the ends of the upper reinforcement 2221 to the two flaps 224. Thus, the design of the flaps 224 and the receiving groove can create a height difference between the upper reinforcement 2221 and the lower reinforcement 2222, so that U-shaped restraint reinforcements of the same specifications can also be combined to form shear-resistant components 222. This makes the construction of the roadbed widening splicing structure time-saving and labor-saving, and the consumption of welding material is not large. Then, the constraint sleeve 226 is fixed to the support column 221 by the support clamp 225, and the buffer 227 is snapped onto the top opening of the constraint sleeve 226 by the annular groove opened on the bottom surface. The column cap 223 is then hoisted into place. Finally, concrete is poured into the pouring space through the grouting hole 2231. After the concrete has solidified, the support clamp 225 is removed from the support column 221. The constraint sleeve 226, column cap 223, shear member 222 and support column 221 can be connected by the concrete in the pouring space to form an integral structure.

[0029] Specifically, the length direction of the upper reinforcement 2221 can be set to be perpendicular to the length direction of the lower reinforcement 2222, and the angle between the length direction of the upper reinforcement 2221 and the length direction of the road 1 is 45°, so that the U-shaped restraint reinforcement can provide restraint in multiple directions, enhancing the overall shear resistance and stability of the far road pile 22, thereby improving the stability of the entire roadbed widening splicing structure and reducing structural deformation and damage caused by external forces; the overall length of the flap 224 when it is fastened at the opening of the receiving groove can be set to be slightly smaller than the opening of the receiving groove, so that concrete can enter the receiving groove from the gap between the flap 224 and the side wall of the receiving groove and fill the receiving groove, thereby making the connection between the U-shaped restraint reinforcement and the support column 221 more stable.

[0030] The working principle of the roadbed widening and splicing structure proposed in this application is as follows: The pad strip 21 of the support component 2 is set on the step surface 11 along the length of the road 1. One side of the precast slab 23 rests on the pad strip 21, and the other side rests on the remote road pile 22 with its bottom end inserted into the ground. The support component 2 is used to stably support the precast slab 23. On this basis, filler material is filled to form a filling layer. This avoids the problems of subsidence and cracking caused by uneven filling and insufficient compaction during the laying of the anti-subsidence layer in the existing technology. It does not require a lot of time to compact the anti-subsidence layer, thus saving time and manpower and shortening the construction period.

[0031] It should be noted that the above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A roadbed widening and splicing structure, laid on one side of the roadbed, characterized in that: The system includes a support assembly (2) and filler material. The support assembly (2) includes a pad strip (21), a remote road post (22), and a precast slab (23). A stepped surface (11) is provided on the side of the roadbed away from the road (1). The pad strip (21) is provided on the stepped surface (11) along the length of the road (1). One side of the precast slab (23) is placed on the pad strip (21). The bottom end of the remote road post (22) is inserted into the ground. The side of the precast slab (23) away from the road (1) is placed on the remote road post (22). The filler is placed on the top of the precast slab (23) and in the gap between the precast slab (23) and the roadbed to form a filling layer. The top surface of the filling layer is flush with the road surface (1).

2. The roadbed widening and splicing structure according to claim 1, characterized in that: The remote pile (22) includes a support column (221), a shear member (222), and a column cap (223). The bottom end of the support column (221) is inserted into the ground. The shear member (222) is fixedly connected to the top end of the support column (221). A socket hole is provided on the bottom surface of the column cap (223). The socket hole is fitted onto the shear member (222) and abuts against the top end of the support column (221) through the edge of the socket hole. The column cap (223) can be connected to the shear member (222) by filling the gap between the shear member (222) and the socket hole with concrete. The precast slab (23) is erected on the column cap (223).

3. The roadbed widening and splicing structure according to claim 2, characterized in that: The shear-resistant member (222) is a U-shaped restraint rib, both ends of which are welded to the support column (221), and the protruding part of the U-shaped restraint rib protrudes upward.

4. The roadbed widening and splicing structure according to claim 3, characterized in that: The U-shaped restraint rib includes an upper rib (2221) and a lower rib (2222). The length direction of the upper rib (2221) is perpendicular to the length direction of the lower rib (2222), and the angle between the length direction of the upper rib (2221) and the length direction of the road (1) is 45°. The protrusion of the lower rib (2222) is located between the protrusion of the upper rib (2221) and the support column (221).

5. A roadbed widening and splicing structure according to claim 4, characterized in that: The remote road post (22) also includes four flaps (224). The top of the support column (221) is provided with four receiving slots at equal intervals around the central axis of the support column (221). The receiving slots correspond one-to-one with the flaps (224). The side of each flap (224) away from the central axis of the support column (221) is hinged to the edge of the corresponding receiving slot. The side of each flap (224) away from the central axis of the support column (221) can rotate around the hinge axis of the flap (224) to the central axis of the support column (221) and be fastened to the corresponding receiving slot. The end of the lower rib (2222) is welded to the bottom wall of the receiving slot. When the flap (224) is fastened to the receiving slot, the end of the upper rib (2221) is welded to the top plate of the flap (224).

6. A roadbed widening and splicing structure according to claim 5, characterized in that: The flip cover (224) includes a connecting plate (2241), a welding plate (2242), and a pad (2243). One side of the connecting plate (2241) is hinged to the groove edge of the receiving groove away from the central axis of the support column (221). The other side of the connecting plate (2241) is hinged to one end of the welding plate (2242). A screw hole is provided on the bottom surface of the welding plate (2242). The pad (2243) The plate is provided with a stud that matches the screw hole, and the pad (2243) can be detachably connected to the welding plate (2242) by screwing the stud and the screw hole. When the flip cover (224) is fastened at the opening of the receiving groove, the pad (2243) is abutted between the bottom wall of the receiving groove and the welding plate (2242), and the end of the upper rib (2221) is welded to the top plate surface of the welding plate (2242).

7. A roadbed widening and splicing structure according to claim 2, characterized in that: The remote pile (22) also includes a support clamp (225) and a restraint sleeve (226). The support clamp (225) is attached to the column body of the support column (221). The bottom opening of the restraint sleeve (226) is fitted onto the support column (221) and abuts against the top of the support clamp (225). The top opening of the restraint sleeve (226) is higher than the top of the support column (221). The top opening of the restraint sleeve (226) abuts against the bottom of the column cap (223) and forms a pouring space between the inner wall of the socket hole, the inner wall of the restraint sleeve (226), and the top of the support column (221). The top of the column cap (223) has a grouting hole (2231) leading to the pouring space.

8. A roadbed widening and splicing structure according to claim 7, characterized in that: The remote road post (22) also includes a buffer (227), which is located between the top opening of the constraint sleeve (226) and the bottom of the post cap (223).

Images