Long-service-life bridge deck pavement layer structure
By setting up the adhesive layer, the waterproof buffer and the fatigue resistance layer and the asphalt concrete layer on the bridge deck paving layer in turn, and setting up drainage grooves and drainage pipes, the problem of poor waterproof performance of the bridge deck paving layer is solved, and the safety and long-life durability of the bridge deck driving are improved.
Patent Information
- Application Number
- CN202421235015.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The waterproof performance of the existing bridge deck paving layer is poor, resulting in early damage to the bridge deck panel and water seepage corrosion, affecting the safety and long-life durability of bridge deck driving.
From top to bottom, the adhesive layer, the waterproof buffer and fatigue resistance layer (including the silicon sand layer and the heavy duty asphalt layer) and the asphalt concrete layer are arranged in sequence, and a drainage tank and drainage pipe are set up between the two, so as to drain the accumulated water by using the drainage pipes.
Effectively prevent the wet and slipperyness caused by water accumulation in the bridge deck paving layer, improve the safety of bridge deck driving and the long life and durability of bridge deck panels, and at the same time enhance the waterproof and rut resistance, reducing the chance of reflective cracks.
Smart Images
Figure CN222685266U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge deck pavement structures, in particular to a long-life bridge deck pavement layer structure. Background Art
[0002] The bridge deck pavement refers to the isolation layer set up between the upper load-bearing concrete structure of the bridge and the external load, so as to weaken the direct friction of the wheels, and avoid the vibration, impact and shear effects of the upper load-bearing concrete structure caused by rapid start or emergency braking of vehicles on the bridge deck, and protect the upper load-bearing concrete structure from direct erosion and corrosion by rainwater.
[0003] At present, a large number of existing highway concrete beam bridge decks have suffered early damage to the bridge deck pavement layer due to the lack of attention to the bridge deck waterproof layer. There are a lot of cases of corrosion and damage to the concrete upper beam slab caused by water seepage. Water seepage is also common at the lap joints of abutments, the joints of piers, and the connections between beams and slabs, which seriously affects the safety of bridge deck driving and has an adverse impact on the country's goal of long-life bridge decks currently advocated. Utility Model Content
[0004] The purpose of the utility model is to provide a long-life bridge deck pavement structure, which solves the problems existing in the background technology. An asphalt concrete layer, a waterproof buffer anti-fatigue layer (silica sand layer, heavy-load asphalt layer) and an adhesive layer are arranged in sequence from top to bottom. The waterproof buffer anti-fatigue layer is used to enhance the waterproof and rutting resistance of the long-life bridge deck, improve the use strength of the bridge deck pavement, and a drainage ditch is provided between the asphalt concrete layer and the waterproof buffer anti-fatigue layer, and the accumulated water is discharged by the drainage pipe, thereby solving the problem of poor waterproof performance of the existing bridge deck pavement.
[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is a long-life bridge deck pavement structure, including an adhesive layer, a waterproof buffer anti-fatigue layer and an asphalt concrete layer laid in sequence from bottom to top on the concrete bridge deck, the waterproof buffer anti-fatigue layer including a silica sand layer and a heavy-loaded asphalt layer, the waterproof buffer anti-fatigue layer is used to enhance the waterproof and rutting resistance of the long-life bridge deck, and the service strength of the bridge deck pavement is improved, the asphalt concrete layer is a two-layer asphalt structure, a plurality of drainage grooves are arranged between the waterproof buffer anti-fatigue layer and the asphalt concrete layer, the bottom of the drainage groove is connected to a drainage pipe, and water is discharged out of the bridge deck through the drainage pipe.
[0006] A further technical solution of the utility model is that the asphalt concrete layer comprises densely distributed asphalt concrete and open-graded asphalt concrete, and the paving thickness of the open-graded asphalt concrete is greater than the paving thickness of the densely distributed asphalt concrete.
[0007] A further technical solution of the utility model is that the silica sand layer is laid on top of the adhesive layer, the heavy-loaded asphalt layer is laid on top of the silica sand layer, the open-graded asphalt concrete is laid on top of the heavy-loaded asphalt layer, and the densely distributed asphalt concrete is laid on top of the open-graded asphalt concrete.
[0008] A further technical solution of the utility model is that the adhesive layer is emulsified asphalt with a density of 0.4±0.1L / m2, and the adhesive layer is laid with a thickness of 1-1.5cm.
[0009] A further technical solution of the utility model is that the silica sand layer is silica sand with a density of 0.7-1.0 kg / m2, and the silica sand layer is laid with a thickness of 0.5-1.0 mm.
[0010] A further technical solution of the utility model is that the heavy-loaded asphalt layer is a No. 90 base asphalt oil with a density of 1.8±0.2kg / m2 and a needle penetration of 50<70, and the laying thickness of the heavy-loaded asphalt layer is 0.3-0.5cm.
[0011] A further technical solution of the utility model is that the depth of the drainage groove is less than the thickness of the waterproof buffer anti-fatigue layer.
[0012] A further technical solution of the utility model is that the drainage groove is arranged on the heavy-loaded asphalt layer.
[0013] A further technical solution of the utility model is that the drainage grooves are cross-arranged in the transverse and longitudinal directions to form a mesh structure.
[0014] A further technical solution of the utility model is that the bottom of the drainage groove is inclined toward the adjacent drainage pipe.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. The utility model sequentially arranges an asphalt concrete layer, a waterproof buffer anti-fatigue layer (silica sand layer, heavy-loaded asphalt layer) and an adhesive layer from top to bottom, and uses a drainage pipe to discharge the water that penetrates into the asphalt concrete layer in the drainage ditch in time, thereby avoiding the slipperiness of the bridge deck pavement layer due to water accumulation, improving the safety of bridge deck driving and the long-life durability of the bridge deck; the utility model waterproof buffer anti-fatigue layer (silica sand layer, heavy-loaded asphalt layer) and the adhesive layer are arranged between the concrete bridge deck and the asphalt concrete layer, which can effectively prevent water, resist rutting, and reduce the probability of reflective cracks.
[0017] 2. The drainage grooves of the utility model are arranged horizontally and vertically on the upper surface of the concrete layer to form a mesh structure. The drainage grooves can effectively collect water seeping from the coarse asphalt layer to improve the collection and discharge efficiency of rainwater. The bottom of the drainage groove of the utility model is inclined toward the adjacent drainage pipe. Rainwater seeping from the pavement layer can fall into the drainage groove and flow along the bottom of the groove toward the adjacent drainage pipe, which greatly improves the discharge speed of rainwater. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0020] In the figure: 1. Concrete bridge deck, 2. Adhesive layer, 3. Silica sand layer, 4. Heavy-duty asphalt layer, 5. Asphalt concrete layer. DETAILED DESCRIPTION
[0021] 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.
[0022] Example 1
[0023] like Figure 1As shown, a long-life bridge deck pavement structure includes a binder layer 2, a waterproof buffer anti-fatigue layer and an asphalt concrete layer 5 which are sequentially laid on a concrete bridge deck 1 from bottom to top. The waterproof buffer anti-fatigue layer includes a silica sand layer 3 and a heavy-duty asphalt layer 4. The waterproof buffer anti-fatigue layer enhances the waterproof and anti-rutting capabilities of the long-life bridge deck and improves the use strength of the bridge deck pavement. The asphalt concrete layer 5 is a two-layer asphalt structure. The asphalt concrete layer 5 includes densely distributed asphalt concrete and open-graded asphalt concrete. The laying thickness of the open-graded asphalt concrete is greater than the laying thickness of the densely distributed asphalt concrete. The silica sand layer 3 is laid on the binder layer 2, the heavy-duty asphalt layer 4 is laid on the silica sand layer 3, the open-graded asphalt concrete is laid on the heavy-duty asphalt layer 4, and the densely distributed asphalt concrete is laid on the open-graded asphalt concrete. A plurality of drainage grooves are arranged between the waterproof buffer anti-fatigue layer and the asphalt concrete layer 5. The bottom of the drainage groove is connected to a drainage pipe, and water is discharged out of the concrete bridge deck 1 through the drainage pipe.
[0024] Example 2
[0025] Based on Example 1, as a further implementation method, before spraying the adhesive layer, the concrete bridge deck 1 should be roughened, finely milled or shot blasted to remove the slurry on the concrete surface and expose fresh aggregate with a depth of 1-3mm to ensure the bonding quality of the adhesive layer and the concrete bridge deck 1.
[0026] The adhesive layer 2 is emulsified asphalt with a density of 0.4±0.1L / m2, and the laying thickness of the adhesive layer is 1-1.5cm; the silica sand layer 3 is silica sand with a density of 0.7-1.0kg / m2, and the laying thickness of the silica sand layer 3 is 0.5-1.0mm; the heavy-loaded asphalt layer 4 is No. 90 base asphalt oil with a density of 1.8±0.2kg / m2 and a needle penetration of 50<70, and the laying thickness of the heavy-loaded asphalt layer 4 is 0.3-0.5cm.
[0027] The drainage groove is set on the heavy-loaded asphalt layer 4. After the construction of the heavy-loaded asphalt layer 4 is completed, grooves that are cross-arranged horizontally and vertically to form a mesh structure are opened on the heavy-loaded asphalt layer 4. The depth of the drainage groove is less than the thickness of the waterproof buffer anti-fatigue layer. The bottom of the drainage groove is inclined toward the adjacent drainage pipe. Rainwater seeping from the pavement layer can fall into the drainage groove and flow along the bottom of the groove toward the adjacent drainage pipe. The drainage mesh structure can not only drain water, but also increase the bonding effect between layers in the structure, which is equivalent to the role of anchoring.
[0028] Example 3
[0029] Based on Example 2, as a further implementation, the adhesive layer 2 is a single-component polyurethane material.
[0030] The characteristic values of single-component polyurethane materials are shown in Table 1.
[0031]
[0032]
[0033] Table 1. Characteristics of one-component polyurethane materials
[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A long-life bridge deck pavement structure, characterized in that: The invention comprises an adhesive layer (2), a waterproof, buffer and anti-fatigue layer and an asphalt concrete layer (5) which are laid on a concrete bridge deck (1) in sequence from bottom to top. The waterproof, buffer and anti-fatigue layer comprises a silica sand layer (3) and a heavy-loaded asphalt layer (4). The asphalt concrete layer (5) is a two-layer asphalt structure. A plurality of drainage grooves are arranged between the waterproof, buffer and anti-fatigue layer and the asphalt concrete layer (5). The drainage grooves are arranged on the heavy-loaded asphalt layer (4). The drainage grooves are arranged crosswise and longitudinally to form a mesh structure. The bottom of the drainage grooves is connected to a drainage pipe. The asphalt concrete layer (5) comprises densely distributed asphalt concrete and open-graded asphalt concrete. The laying thickness of the open-graded asphalt concrete is greater than that of the densely distributed asphalt concrete. The silica sand layer (3) is laid on the adhesive layer (2). The heavy-loaded asphalt layer (4) is laid on the silica sand layer (3). The open-graded asphalt concrete is laid on the heavy-loaded asphalt layer (4). The densely distributed asphalt concrete is laid on the open-graded asphalt concrete.
2. The long-life bridge deck pavement structure according to claim 1, characterized in that: The adhesive layer (2) is emulsified asphalt with a density of 0.4±0.1L / m2, and the adhesive layer (2) is laid with a thickness of 1-1.5cm.
3. The long-life bridge deck pavement structure according to claim 1 is characterized in that: The silica sand layer (3) is silica sand with a density of 0.7-1.0 kg / m2, and the silica sand layer (3) is laid to a thickness of 0.5-1.0 mm.
4. The long-life bridge deck pavement structure according to claim 1 is characterized in that: The heavy-loaded asphalt layer (4) is a No. 90 base asphalt oil with a density of 1.8±0.2kg / m2 and a needle penetration of 50<70. The laying thickness of the heavy-loaded asphalt layer (4) is 0.3-0.5cm.
5. A long-life bridge deck pavement structure according to any one of claims 1 to 4, characterized in that: The depth of the drainage groove is less than the thickness of the waterproof, buffer and anti-fatigue layer.
6. The long-life bridge deck pavement structure according to claim 5, characterized in that: The bottom of the drainage groove is inclined toward the adjacent drainage pipe.