Connection structure of cement concrete pavement and asphalt service lane

Abstract

The utility model discloses a connecting structure of a cement concrete pavement and an asphalt service lane, which relates to the technical field of airport infrastructure construction, and comprises a precast concrete cushion block and a precast concrete pressing block, and the same ends of the precast concrete cushion block and the precast concrete pressing block are provided with clamping grooves. The other ends of the prefabricated concrete cushion block and the prefabricated concrete pressing block are provided with clamping protrusions. According to the prefabricated concrete cushion block structure, the prefabricated concrete cushion block, the prefabricated concrete pressing block, the threaded sleeve and the connecting bolt are arranged, so that the cushion block structure improves the size accuracy in a prefabricated mode, the mold shifting phenomenon is avoided, the linearity of the concrete edge after mold removal is guaranteed, and manual edge sweeping through a cutting machine is not needed.

Description

Technical Field

[0001] This utility model relates to the field of airport infrastructure construction technology, specifically to a junction structure between a cement concrete pavement and an asphalt service lane. Background Technology

[0002] In civil airport runway engineering, the cement concrete pavement structure and the asphalt service lane structure are often constructed by two different subcontractors. Due to the two different structural forms, the joints are often reinforced with C30 concrete blocks, which are L-shaped and extend 1000mm into the bottom of the pavement. The construction sequence is as follows: construction of the water-stabilized base layer under the cement concrete surface layer – installation of C30 concrete block formwork – construction of C30 concrete block concrete – edge cleaning of the blocks – formwork erection for the cement concrete surface layer – construction of the cement concrete surface layer – construction of the water-stabilized base layer under the asphalt service lane – construction of the asphalt surface layer.

[0003] With traditional structures, edge cracks and settlement misalignment often occur at the junction of cement concrete pavement and asphalt service lanes. Meanwhile, during construction, after the water-stabilized base course under the cement concrete pavement is completed, the cement concrete pavement construction can only proceed after the C30 concrete pad blocks are completed. Since the cement concrete pavement structure and the C30 concrete pad blocks under the service lanes are constructed by two different companies, there is an overlap in their work. This affects the progress of the cement concrete pavement structure construction. Furthermore, the quality disadvantages of constructing the C30 concrete pad blocks before the cement concrete pavement are: 1. The C30 concrete pad blocks are constructed with commercial concrete, resulting in low precision and poor fixation of the formwork, often leading to formwork displacement. After demolding, the straightness of the concrete edges is poor, requiring manual edge cleaning using a cutting machine; 2. The cement concrete pavement is the main structure with high quality requirements. When the C30 concrete pad blocks are constructed first, if the sidewalls shift or the formwork is not straight, the cement concrete pavement and the C30 concrete pad block sides will not be perpendicularly connected. This will cause localized changes in the cross-section of the cement concrete pavement resting on the C30 concrete side, resulting in stress concentration and ultimately causing end cracks and damage. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a junction structure between cement concrete pavement and asphalt service lane. By setting precast concrete pads, precast concrete pressure blocks, threaded sleeves and connecting bolts, the pad structure improves the dimensional accuracy through prefabrication, avoids the phenomenon of formwork displacement, and ensures the straightness of the concrete edge after demolding. It eliminates the need for manual edge sweeping with a cutting machine, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a junction structure between a cement concrete pavement and an asphalt service lane, comprising a precast concrete pad block and a precast concrete pressing block, wherein a locking groove is provided at the same end of the precast concrete pad block and the precast concrete pressing block, and a locking protrusion is provided at the other end of the precast concrete pad block and the precast concrete pressing block, wherein a threaded sleeve is provided inside the precast concrete pad block and the precast concrete pressing block, and a connecting bolt is installed inside the threaded sleeve, and a soil-entry cone is provided on the lower side of the precast concrete pad block.

[0006] Furthermore, an asphalt service lane is provided on the upper side of the precast concrete block, and a water-stabilized base course is provided on one side of the precast concrete pad block.

[0007] Furthermore, a water-stabilized base course is provided on the upper side of the water-stabilized subbase course, and a composite geomembrane is provided on the upper side of the water-stabilized base course.

[0008] Furthermore, a concrete surface layer is provided on the upper side of the composite geomembrane, and the soil-penetrating cones are evenly spaced on the lower side of the precast concrete pad.

[0009] Furthermore, the precast concrete pad block is provided with a sloping platform, and the sloping platform has an inclination angle of 20 degrees.

[0010] Furthermore, the soil-inserting cone has a truncated pyramidal structure, and the inner sides of the precast concrete pad and the precast concrete compact are both equipped with steel reinforcement cages.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention utilizes precast concrete pads, precast concrete pressure blocks, threaded sleeves, and connecting bolts to improve the dimensional accuracy of the pad structure through prefabrication, preventing formwork displacement. After demolding, the straightness of the concrete edges is guaranteed, eliminating the need for manual edge trimming with a cutting machine. The inclined platform, locking protrusions, and locking grooves allow for staggered connection between the precast concrete pads and pressure blocks, forming a unified structure. This ensures structural strength and precise external dimensional forming, preventing sidewall displacement or misalignment. The concrete pavement surface is perpendicularly connected to the side of the concrete pad, preventing stress concentration caused by the concrete pavement resting on the side of the concrete pad and thus avoiding end cracking. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the precast concrete pad and the precast concrete compact in the separated state of this utility model;

[0015] Figure 3 This is a top view of the structure when the precast concrete blocks and precast concrete pads are connected in this utility model.

[0016] In the diagram: 1. Concrete surface layer; 2. Water-stabilized subbase; 3. Water-stabilized base course; 4. Composite geomembrane; 5. Precast concrete pad; 6. Asphalt service lane; 7. Precast concrete block; 8. Ground entry cone; 9. Connecting bolt; 10. Threaded sleeve; 11. Locking groove; 12. Locking protrusion; 13. Inclined platform. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 This embodiment provides a technical solution: a junction structure between a cement concrete pavement and an asphalt service lane, including a precast concrete pad block 5 and a precast concrete pressing block 7. The precast concrete pad block 5 and the precast concrete pressing block 7 are provided with a locking groove 11 at the same end, and a locking protrusion 12 at the other end. A threaded sleeve 10 is provided inside the precast concrete pad block 5 and the precast concrete pressing block 7, and a connecting bolt 9 is installed inside the threaded sleeve 10. A soil-entry cone 8 is provided on the lower side of the precast concrete pad block 5.

[0019] like Figure 1-3As shown, during construction, a water-stabilized base course 2 is first set up, followed by a water-stabilized base course 3. Precast concrete blocks 5 are pressed into the base soil using insertion cones 8 to ensure the stability of the precast concrete blocks 5. Adjacent precast concrete blocks 5 are then connected using locking protrusions 12 and locking grooves 11. Precast concrete blocks 7 are then placed staggered on the upper sides of two adjacent precast concrete blocks 5, and connected and fixed together with bolts 9 inserted into bolt sleeves 10, forming a stable whole. A composite geomembrane 4 is then laid on the upper side of the water-stabilized base course 3. Finally, a concrete surface layer 1 and an asphalt service lane 6 are integrally poured. Concrete spacers, precast concrete blocks, threaded sleeves, and connecting bolts enable the spacer structure to achieve higher dimensional accuracy through prefabrication, preventing formwork displacement. After demolding, the straightness of the concrete edges is guaranteed, eliminating the need for manual edge trimming with a cutting machine. The precast concrete spacers and blocks are connected in a staggered manner using inclined platforms, locking protrusions, and locking grooves, forming a unified structure. This ensures structural strength and precise external dimensional forming, preventing sidewall displacement or misalignment. The concrete pavement surface is perpendicular to the sides of the concrete spacers, preventing stress concentration caused by the concrete pavement resting on the sides of the concrete spacers, thus avoiding end cracking.

[0020] An asphalt service lane 6 is provided on the upper side of the precast concrete block 7, and a water-stabilized base course 3 is provided on one side of the precast concrete pad block 5.

[0021] A water-stabilized base course 3 is installed on the upper side of the water-stabilized base course 3, and a composite geomembrane 4 is installed on the upper side of the water-stabilized base course 3.

[0022] A concrete surface layer 1 is provided on the upper side of the composite geomembrane 4, and soil-penetrating cones 8 are evenly spaced on the lower side of the precast concrete pad 5.

[0023] The precast concrete pad block 5 is provided with a sloping platform 13, and the sloping platform 13 has an inclination angle of 20 degrees.

[0024] The soil-insertion cone 8 has a truncated pyramidal structure, and the inner sides of the precast concrete pad block 5 and the precast concrete pressure block 7 are both equipped with steel reinforcement skeletons.

[0025] The working principle of the junction structure between cement concrete pavement and asphalt service lane provided by this utility model is as follows: Figures 1-3As shown, during construction, a water-stabilized base course 2 is first set up, followed by a water-stabilized base course 3. Precast concrete blocks 5 are pressed into the base soil using insertion cones 8 to ensure the stability of the precast concrete blocks 5. Adjacent precast concrete blocks 5 are then connected using locking protrusions 12 and locking grooves 11. Precast concrete blocks 7 are then placed staggered on the upper sides of two adjacent precast concrete blocks 5, and connected and fixed together with bolts 9 inserted into bolt sleeves 10, forming a stable whole. A composite geomembrane 4 is then laid on the upper side of the water-stabilized base course 3. Finally, a concrete surface layer 1 and an asphalt service lane 6 are integrally poured. Concrete pads, precast concrete blocks, threaded sleeves, and connecting bolts enable the precast pad structure to improve dimensional accuracy, preventing formwork displacement. After demolding, the straightness of the concrete edges is guaranteed, eliminating the need for manual edge trimming with a cutting machine. The precast concrete pads and blocks are staggered vertically through inclined platforms, locking protrusions, and locking grooves, forming a unified structure that ensures structural strength and dimensional accuracy of the outer surface. This prevents sidewall displacement or misalignment, ensuring perpendicular contact between the concrete pavement and the side of the concrete pad, avoiding stress concentration caused by the concrete pavement resting on the side of the concrete pad, and thus preventing end cracking. The above description is merely an embodiment of this utility model and does not limit the patent scope. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cement concrete pavement and asphalt service lane joint structure comprising precast concrete pads and precast concrete blocks, characterized in that: The prefabricated concrete cushion and the prefabricated concrete block are provided with clamping grooves at the same end, clamping protrusions at the other end, and threaded sleeves penetrating the inner side, the threaded sleeves are provided with connecting bolts, and the prefabricated concrete cushion is provided with earth penetration cones on the lower side.

2. The cement concrete pavement and asphalt service lane joint structure according to claim 1, characterized in that: The prefabricated concrete block is provided with an asphalt service lane on the upper side, and the prefabricated concrete cushion is provided with a water-stable bottom base on one side.

3. The cement concrete pavement and asphalt service lane joint structure according to claim 2, characterized in that: The water-stable bottom base is provided with a water temperature base on the upper side, and the water temperature base is provided with a composite geomembrane on the upper side.

4. The cement concrete pavement and asphalt service lane joint structure according to claim 3, characterized in that: The composite geomembrane is provided with a concrete surface layer on the upper side, and the earth penetration cones are arranged at equal intervals on the lower side of the prefabricated concrete cushion.

5. The cement concrete pavement and asphalt service lane joint structure according to claim 1, characterized in that: The prefabricated concrete cushion is provided with an inclined platform, and the inclined angle of the inclined platform is 20 degrees.

6. The cement concrete pavement and asphalt service lane joint structure according to claim 1, characterized in that: The earth penetration cone is a quadrangular frustum structure, and the inner side of the prefabricated concrete cushion and the prefabricated concrete block is provided with a steel reinforcement framework.

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