Splicing structure for new and old road sections
By using technical means such as self-tapping bolts, steel mesh and pre-embedded I-steel in the splicing of new and old sections, the problem of steel bar welding affecting the anchoring force of planting rubber and the sinking and bias of the pulling steel bars is solved, and a higher integrity and firmness of the section is achieved.
Patent Information
- Application Number
- CN202421983647.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-16
AI Technical Summary
During the splicing process of new and old road sections, the welding of steel bars affects the anchoring force of the original road section, and the amount of steel bars is difficult to control, which can easily cause longitudinal seams after opening to traffic; at the same time, the tied steel bars may sink during the pouring process, resulting in a deviation, making it difficult to achieve the expected effect.
Self-tapping bolts are used instead of welding to fix the reserved steel bars of new and old sections to avoid the impact of welding on the planting rubber; lay steel mesh between new and old sections, and reinforced by wire drawing or spot welding to enhance lateral connection and integrity; pre-embedded I-shaped steel and the tied I-shaped steel are fixedly connected by screws to ensure the stability of the steel bars.
The integrity and firmness of splicing of new and old road sections is improved, the impact of welding on the planting rubber is avoided, the process is simplified, the occurrence of longitudinal seam diseases is reduced, and the stability of the steel bars is ensured, and the expected splicing effect is achieved.
Smart Images
Figure CN222990518U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of road section construction, in particular to a new and old road section splicing structure. Background Art
[0002] In recent years, with the rapid development of my country's economy, the traffic volume of highways has increased year by year, and the traffic volume of some highways has approached the saturation traffic volume. After the expansion of many routes that are running at full capacity, there must be the problem of interaction between the new and old roadbeds in the widening and splicing of highways. In order to increase the overall bearing capacity of the pavement, tie steel bars are usually used on the new and old sections to achieve the tie between the new and old pavements and improve the integrity of the new and old pavements after pouring. Since steel bar welding affects the anchoring force of the rebar glue in the original section, and the amount of rebar glue is difficult to control, it is easy to cause longitudinal joint diseases after opening to traffic; and in the actual construction process of tie steel bars, when the road groove is left between the new section and the old road for pouring the new pavement, one end of the tie steel bar is often in a suspended state, resulting in the pouring process. Due to the self-weight of the upper concrete, one end of the tie steel bar may sink, and the entire tie steel bar is displaced, and it is difficult to achieve the expected effect after pouring. Summary of the invention
[0003] In order to solve the above technical problems, the utility model provides a new and old road section splicing structure, thereby improving the integrity and firmness of the spliced road section.
[0004] The new and old road section splicing structure provided by the utility model comprises a new road section and an old road section, and a road groove for splicing the new and old road sections is reserved between the new road section and the old road section;
[0005] A plurality of fixedly embedded I-beams are pre-buried at the bottom of the road trough between the new road section and the old road section, and a plurality of tension I-beams are erected between the new road section and the old road section, the tension I-beams correspond to the embedded I-beams one by one and are fixedly connected by screws;
[0006] The road end of the new road section is provided with a self-tapping bolt, and the old road section is provided with a reserved steel bar, and the self-tapping bolt is fixedly welded to the reserved steel bar at the corresponding position;
[0007] A steel mesh is also laid between the new road section and the old road section.
[0008] Preferably, the tension I-beam and the embedded I-beam are respectively provided with a plurality of through holes corresponding to each other, and the screw rods respectively pass through the through holes of the tension I-beam and the embedded I-beam and are fixedly connected by nuts.
[0009] Preferably, a PVC tube is sleeved on the screw.
[0010] Preferably, the steel bars in the paving layer of the old road section are welded or tied to the steel bar mesh spliced at the longitudinal joint, and the steel bar mesh is located below the tensioned I-beam.
[0011] Preferably, steel backing plates are padded at the supporting points between the tensioned I-beam and the new and old road sections.
[0012] Preferably, the tensioned I-beam adopts single-point support for the new and old road sections.
[0013] Preferably, the width of the road trough arranged between the new and old road sections is 80 cm - 120 cm.
[0014] Preferably, concrete is paved in the road trough between the new and old road sections.
[0015] The utility model has the following beneficial effects:
[0016] 1. The utility model uses self-tapping bolts to avoid the influence of welding on the planting glue, ensuring the anchoring force. Instead of planting bars, self-tapping bolts are used, which simplifies the process and is easier to operate. A steel bar mesh is paved between the new and old road sections and firmly tied or spot-welded with binding wire, strengthening the lateral connection between the new and old road sections and the integrity of the new and old road sections.
[0017] 2. The utility model pre-buries and fixes the embedded I-beam in the road trough, installs the screw rod into the through-hole of the embedded I-beam and then tightens and fixes it with a nut. Subsequently, a tensioned I-beam is horizontally framed on the new and old road sections, and the tensioned I-beam passes through the screw rod through the opened through-hole and is tightened and fixed with a nut again, so that the tensioned I-beam and the embedded I-beam reinforce the connection part on the new and old road sections. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0019] Figure 1 It is a schematic structural diagram of a preferred embodiment of the new and old road section splicing structure provided by the present utility model.
[0020] Figure 2 For Figure 1 The enlarged structural diagram at the position A shown.
[0021] Figure 3 For Figure 1 The side view structural diagram shown.
[0022] Figure 4 for Figure 1 Schematic diagram of the laying structure of the steel mesh shown.
[0023] Numbers in the figure: 1. Tension I-beam; 2. Screw; 3. Steel mesh; 4. Reserved steel bars; 5. Self-tapping bolts; 6. Concrete; 7. New road section; 8. Old road section; 9. Embedded I-beam; 9a. Road trough. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] like Figures 1-4 The embodiment of the utility model provides a new and old road section splicing structure, which includes: a tension I-beam 1, an embedded I-beam 9, a steel mesh 3, a reserved steel bar 4, a self-tapping bolt 5, a new road section 7 and an old road section 8.
[0026] Among them, Figure 3 As shown, a road groove 9a for splicing the new and old road sections is reserved between the new road section 7 and the old road section 8, and a plurality of fixedly embedded I-beams 9 are horizontally pre-buried at the bottom of the road groove 9a between the new road section 7 and the old road section 8, and a plurality of tension I-beams 1 are also horizontally erected between the new road section 7 and the old road section 8, and the corresponding upper and lower tension I-beams 1 correspond one-to-one to the embedded I-beams 9 and are fixedly connected by screws 2; specifically, a plurality of mutually corresponding through holes are respectively opened on the tension I-beams 1 and the embedded I-beams 9, and the screws 2 respectively pass through the through holes opened on the tension I-beams 1 and the embedded I-beams 9 and are fixedly connected by nuts.
[0027] Preferably, the tension I-beam 1 and the embedded I-beam 9 are both made of I 22 hot-rolled ordinary I-beam.
[0028] During operation, the embedded I-beam 9 is first embedded and fixed in the road groove 9a, and the screw rod 2 is installed in the through hole of the embedded I-beam 9 and then tightened and fixed with a nut. Subsequently, the tension I-beam 1 is cross-mounted on the new section 7 and the old section 8, and the tension I-beam 1 passes through the screw rod 2 through the opened through hole and is tightened and fixed again with a nut, so that the tension I-beam 1 and the embedded I-beam 9 reinforce the connection between the new and old sections, eliminating the hidden danger of sinking of the tension I-beam 1 during the subsequent pouring of concrete 6.
[0029] Preferably, steel backing plates are placed at the support points between the tensioned I-beams 1 and the new section 7 and the old section 8, and the tensioned I-beams 1 adopt single-point support for the new section 7 and the old section 8; further, after the screw 2 is tightened, several objects such as wooden wedges can be placed in the gap between the bottom tensioned I-beam 1 and the roadbed to further ensure the reliability of force transmission of the road section.
[0030] Preferably, a PVC pipe is sleeved on the part of the screw 2 passing through the hollow slab beam to improve the protection of the screw 2. The hollow slab beam refers to the position where pouring is required and has not been poured yet, so it is called hollow. After pouring is completed, a slab beam is formed. That is, the position protected by the PVC pipe at least includes the part between the tensioned I-beam 1 and the embedded I-beam 9.
[0031] In the embodiment of the present utility model, as Figure 2 , 3 shown, self-tapping bolts 5 are planted at the road end of the new section 7, and reserved steel bars 4 are laid on the old section 8, and the self-tapping bolts 5 are fixedly welded to the reserved steel bars 4 at the corresponding positions. The use of self-tapping bolts 5 can avoid the influence of welding on the implanting glue in the road section, ensure the anchoring force, and the use of self-tapping bolts 5 instead of implanting steel bars simplifies the process and is easier to operate.
[0032] In the embodiment of the present utility model, please refer to Figure 3 , 4 , a steel mesh 3 is also laid between the new section 7 and the old section 8. The steel bars in the paving layer of the old section 8 are welded or tied to the steel mesh 3 spliced at the longitudinal joint, and the steel mesh 3 is located below the tensioned I-beam 1.
[0033] Preferably, the steel mesh 3 adopts a D10 cold-rolled shaped steel mesh sheet. Each steel mesh is overlapped by a button joint method, with a length of 20 cm. The adjacent steel bars are staggered by 50 cm for overlapping and are firmly tied or spot-welded with binding wires, strengthening the lateral connection between the new and old road sections and the integrity of the new and old road sections.
[0034] In the embodiment of the present utility model, the width of the road trough 9a provided between the new section 7 and the old section 8 is 80 cm - 120 cm, and concrete 6 is paved in the road trough 9a between the new section 7 and the old section 8.
[0035] During operation, first let the concrete 6 enter the road trough 9a to be poured through a truck-mounted pump. The concrete 6 is leveled manually, and it is required to be evenly paved. At the same time, it is strictly prohibited to discharge the concrete at one time. It should be shoveled into batches with an iron shovel to ensure that the steel bars do not shift or deform. For the concrete 6 at the corners, first vibrate it with an internal vibrator, and then vibrate it comprehensively with a plate vibrator. Finally, level it further with a manual and a roller slurry lifting pipe. All the concrete 6 on the road surface must be vibrated and leveled and then corrected and formed with a roller and a crown board. After vibrating and compacting, use a troweling machine to finish the surface, and finally carry out the transverse brooming work. The brooming depth is 1 mm - 2 mm to strengthen the adhesion with the asphalt concrete paving layer.
[0036] The construction process of the new and old road section splicing structure provided by the present utility model is as follows:
[0037] First, pre-embed and fix the embedded I-beam 9 in the road trough 9a. After installing the screw rod 2 into the through hole of the embedded I-beam 9 and tightening it with a nut, connect the self-tapping bolt 5 and the reserved steel bar 4 on the new road section 7 by welding. Using the self-tapping bolt 5 avoids the influence of welding on the planting glue and ensures the anchoring force. Using the self-tapping bolt 5 instead of planting steel bars simplifies the process and is easier to operate. Subsequently, spread the steel bar mesh 3 between the new road section 7 and the old road section 8. The steel bar mesh 3 uses a D10 cold-rolled shaped steel bar mesh sheet. Each steel bar mesh is overlapped by the buckle connection method, with a length of 20 cm. The adjacent steel bars are staggered by 50 cm for overlapping, and are firmly tied or spot-welded with binding wire to strengthen the transverse connection between the new and old road sections and the integrity of the new and old road sections. Subsequently, horizontally install the tension I-beam 1 on the new road section 7 and the old road section 8, and make the tension I-beam 1 pass through the screw rod 2 through the opened through hole and then tighten and fix it again with a nut, so that the tension I-beam 1 and the embedded I-beam 9 are reinforced on the new and old road sections. After the installation of the tension I-beam 1 is completed, let the concrete 6 enter the road trough 9a to be poured through a truck-mounted pump. The concrete 6 is leveled manually to ensure that the steel bars do not shift or deform.
[0038] Each embodiment in this specification is described in a related manner. For the same or similar parts between the embodiments, reference can be made to each other. The key point of each embodiment is to illustrate the differences from other embodiments.
[0039] The above are only the preferred embodiments of the present utility model and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.
Claims
1. A new and old road section splicing structure, comprising a new road section (7) and an old road section (8), wherein a road groove (9a) is provided between the new road section (7) and the old road section (8) for splicing the new and old road sections, characterized in that: A plurality of fixedly embedded I-beams (9) are pre-buried at the bottom of the road trough (9a) between the new road section (7) and the old road section (8), and a plurality of tensioning I-beams (1) are arranged between the new road section (7) and the old road section (8), wherein the tensioning I-beams (1) correspond to the embedded I-beams (9) one by one and are fixedly connected via screws (2); A self-tapping bolt (5) is provided at the road end of the new road section (7), and a reserved steel bar (4) is provided at the road end of the old road section (8), and the self-tapping bolt (5) is fixedly welded to the reserved steel bar (4) at the corresponding position; A steel mesh (3) is also laid between the new road section (7) and the old road section (8).
2. The new and old road section splicing structure according to claim 1 is characterized in that: The tensioning I-beam (1) and the embedded I-beam (9) are respectively provided with a plurality of through holes corresponding to each other, and the screw rod (2) passes through the through holes of the tensioning I-beam (1) and the embedded I-beam (9) and is fixedly connected by nuts.
3. The new and old road section splicing structure according to claim 2 is characterized in that: A PVC tube is sleeved on the screw rod (2).
4. The new and old road section splicing structure according to claim 1 is characterized in that: The steel bars in the pavement layer of the old road section (8) are welded or tied to the steel mesh (3) spliced by the longitudinal seams, and the steel mesh (3) is located below the tensioning I-beam (1).
5. The new and old road section splicing structure according to claim 1 is characterized in that: The supporting points between the tension I-beam (1) and the new road section (7) and the old road section (8) are padded with steel pads.
6. The new and old road section splicing structure according to claim 5 is characterized in that: The tension I-beam (1) and the new road section (7) and the old road section (8) are supported at a single point.
7. The new and old road section splicing structure according to claim 1 is characterized in that: The width of the road groove (9a) provided between the new road section (7) and the old road section (8) is 80 cm to 120 cm.
8. The new and old road section splicing structure according to claim 7 is characterized in that: Concrete (6) is paved in the road groove (9a) between the new road section (7) and the old road section (8).