Construction process for bridge deck pavement

Abstract

The invention discloses a bridge deck pavement construction process, which belongs to the field of bridge deck pavement construction, and comprises the following steps: step 1, construction preparation: checking construction materials and construction equipment, and defining a technical scheme; 2, base layer treatment, wherein bridge floor cleaning, shot blasting treatment and local repairing are conducted; step 3, surveying and setting out; a waterproof layer and a pavement main body are sequentially paved, a bonding layer is paved between every two layers, the pavement main body comprises a plurality of main body sections which are sequentially connected from bottom to top, a steel reinforcement framework is paved in each main body section, and concrete is poured in each main body section; fifthly, joint cutting is carried out on the pavement body, and concrete curing is carried out; and step 6, surface layer construction: paving an asphalt surface layer on the surface of the pavement main body, carrying out primary pressing and secondary pressing through a road roller, and carrying out acceptance inspection after pavement is completed. By adopting the construction process of the bridge deck pavement, the problem that the pavement main body of the bridge deck pavement in the prior art is weak in compression resistance, bending resistance, shearing resistance and impact resistance can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge deck pavement construction, and in particular to a bridge deck pavement construction process. Background Art

[0002] Bridge deck paving is one of the main construction links in bridge construction. Bridge deck paving refers to the protective layer laid on the bridge deck to prevent the wheels (or tracks) from directly wearing the bridge deck, spread the wheel load, and provide a flat and non-slip driving surface for vehicles.

[0003] During the bridge deck paving construction, a waterproof layer, a paving body and a surface layer are usually laid on the bridge deck base. Among them, the paving body is the main process in the entire bridge deck paving and plays an important role in the compressive resistance of the bridge deck.

[0004] Different thicknesses of pavement bodies need to be laid according to different bridge deck requirements. In the prior art, a steel mesh is usually used to cast a concrete layer to complete the construction of the pavement body. The steel mesh is a single-layer sheet structure with a thin thickness and cannot effectively reinforce the concrete layer, resulting in weak compression and bending resistance of the pavement body. Summary of the invention

[0005] The purpose of the present invention is to provide a construction process for bridge deck pavement, so as to solve the problem that the pavement body of bridge deck pavement in the prior art has weak compression resistance, bending resistance, shear resistance and impact resistance.

[0006] To achieve the above object, the present invention provides a construction process for bridge deck paving, comprising the following steps: Step 1, construction preparation: check the flatness, strength and cracks of the bridge deck base, confirm the quality of construction materials, complete the mix ratio design, check the construction equipment, clarify the technical plan, and conduct safety and technical briefings for the operators; Step 2: Base treatment: clean the bridge deck, and perform shot blasting and local repairs; Step 3, measurement and setting out: set the reference line according to the design elevation, calibrate the thickness of the pavement layer, determine the thickness and slope of the pavement layer, and control the paving range; Step 4: Bridge deck paving: the waterproof layer and the main paving layer are paved in sequence, and the bonding layer is paved between each layer. The main paving layer includes several main sections connected in sequence from bottom to top, and the main sections are paved with steel skeletons and poured with concrete; Step 5: Cutting and curing: Cut the contraction joints of the main body of the pavement according to the design, and cover the concrete with geotextile or film for moisture preservation and curing; Step six, surface layer construction: lay the asphalt surface layer on the main surface of the pavement, and use a roller to perform initial and re-compacting, and conduct acceptance after the paving is completed.

[0007] Preferably, in step one, the construction materials include concrete, steel bars, and waterproof materials. During the equipment inspection, the paver, roller, shot blasting machine, and vibrator are debugged to ensure that the equipment is operating normally.

[0008] Preferably, in step 2, when cleaning the bridge deck, the floating slurry, oil stains and loose particles on the bridge deck are removed, the bridge deck base is washed with a high-pressure water gun, the bridge deck is roughened using a shot blasting machine, and the honeycombs and holes on the bridge deck are filled with epoxy mortar.

[0009] Preferably, in step 4, the bonding layer uses polymer modified cement slurry, and the waterproof material uses SBS modified asphalt membrane, which are evenly constructed in 2-3 times, and two coats of FYT-1 waterproof coating are sprayed.

[0010] Preferably, in step four, the main body segments are connected by a number of connecting columns arranged at equal intervals, and the main body segments include steel plates arranged on both sides of the steel skeleton, and the steel plates are provided with reserved holes for the connecting columns to pass through.

[0011] Preferably, the steel skeleton includes several layers of steel bars evenly spaced from bottom to top along the steel plate, the steel bars include several transverse steel bars and several longitudinal steel bars perpendicularly disposed to each other, the transverse steel bars and the longitudinal steel bars are evenly spaced, both ends of the longitudinal steel bars are welded to the steel plate, the transverse steel bars are laid on the upper layer of the longitudinal steel bars, and the connection between the transverse steel bars and the longitudinal steel bars is tied and welded by steel wire.

[0012] Preferably, a plurality of transverse steel bars and longitudinal steel bars are arranged perpendicularly to each other to form a plurality of steel bar grids, in which oblique steel bars are arranged, and the oblique steel bars are used to connect the two vertices of the steel bar grid, and the two ends of the oblique steel bars are respectively welded to the connection points between the transverse steel bars and the longitudinal steel bars.

[0013] Preferably, the connecting column includes a plurality of column sections arranged in sequence from top to bottom, an insertion hole is provided at the bottom end of the column section, an insertion rod is provided at the top end of the column section, a pressing block is slidably provided at the top end of the insertion rod, an external thread is provided at the bottom end of the insertion rod, two pop-up blocks are symmetrically provided on both sides of the bottom end of the pressing block, the pop-up blocks are slidably provided in the insertion rod, a fixed block is provided in the middle of the two pop-up blocks, both sides of the fixed block are connected to the pop-up block by springs, and inclined surfaces are provided at the connection between the pressing block and the pop-up block; an annular groove matching the pop-up block is provided at the top end of the insertion hole, an internal thread is provided at the bottom end of the insertion hole, and the insertion rod is connected to the insertion hole through threads.

[0014] Preferably, in step five, shrinkage joints are cut at intervals, the cutting depth is 1 / 3 of the thickness of the pavement body, and polyurethane sealant is poured, and the concrete surface is kept moist for ≥ 7 days during concrete curing.

[0015] Preferably, in step six, the modified asphalt is spread, initially compacted with a double steel wheel roller, and then re-compacted with a rubber wheel roller, and after completion, the flatness and anti-skid value are tested.

[0016] Therefore, the present invention adopts the above-mentioned bridge deck paving construction process, which has the following beneficial effects: The bridge deck paving body of the present invention adopts a multi-layer segmented body to be constructed in sequence, and bridge deck paving of different thicknesses is carried out according to needs, which makes paving more convenient; at the same time, the multi-layer segmented bodies are connected in sequence through connecting columns to increase the connection strength of the paving body, and a multi-layer steel mesh arranged in a criss-cross pattern is adopted, and the steel mesh is densely provided with oblique steel bars to strengthen the connection, thereby further improving the strength of the paving body, thereby greatly improving the compression, bending, shearing and impact resistance of the paving body.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A method flow chart of a construction process embodiment of a bridge deck pavement of the present invention; Figure 2 A schematic diagram of a layered structure of a bridge deck pavement according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the front structure of the segmented main body of an embodiment of the present invention; Figure 4 A top view of a segmented main body of an embodiment of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of point A; Figure 6 This is a schematic diagram of connecting adjacent column segments according to an embodiment of the present invention; Figure 7 for Figure 6 An enlarged schematic diagram of point B; Figure 8 Schematic diagram of the insertion hole structure of an embodiment of the present invention.

[0019] Reference numerals 1. Paving body; 2. Waterproof layer; 3. Main body segmentation; 4. Connecting column; 5. Steel plate; 6. Steel bar layer; 7. Horizontal steel bar; 8. Longitudinal steel bar; 9. Steel bar grid; 10. Oblique steel bar; 11. Insert rod; 12. Press block; 13. Pop-up block; 14. Fixed block; 15. Spring; 16. Inclined surface; 17. Insert hole; 18. Thread; 19. Annular groove; 20. Surface layer; 21. Column segment. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages disclosed in the embodiments of the present invention clearer, the embodiments of the present invention are further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0021] It should be noted that the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or devices.

[0022] Like reference numerals and letters denote similar items in the following drawings, and thus, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example like Figure 1 As shown, a construction process for bridge deck paving according to the present invention comprises the following steps: Step 1: Construction Preparation Check the flatness, strength and cracks of the bridge deck base; Material preparation: confirm that the quality of concrete, steel bars, waterproof materials, etc. is qualified, and complete the mix ratio design; Equipment inspection: Debugging pavers, rollers, shot blasting machines, vibrators and other equipment to ensure normal operation; Technical briefing: clarify the construction plan and provide safety and technical briefings to the workers.

[0026] Confirm that the quality of construction materials is qualified, complete the mix ratio design, check the construction equipment, clarify the technical plan, and provide safety and technical briefings to the workers.

[0027] Step 2: Base treatment: clean the bridge deck, and perform shot blasting and local repairs on it.

[0028] Clean the bridge deck: remove floating slurry, oil stains, loose particles, ensure the base is dry and crack-free, rinse the bridge deck base with a high-pressure water gun and then dry it; Shot blasting: Use a shot blasting machine to roughen the bridge deck to increase the roughness (the roughness should be 0.4~0.8mm); Local repair: Use epoxy mortar to fill defects such as honeycombs and holes.

[0029] Step three, measurement and layout: set the reference line according to the design elevation, calibrate the pavement layer thickness (8~15cm), determine the pavement layer thickness and slope, and control the paving range.

[0030] Step 4: bridge deck paving: sequentially lay the waterproof layer 2 and the paving body 1, with an adhesive layer laid between each layer. The paving body 1 includes several layers of main body sections 3 connected sequentially from bottom to top, and a steel skeleton is laid in the main body section 3 and concrete is poured.

[0031] The bonding layer uses polymer modified cement slurry, and the waterproof material uses SBS modified asphalt membrane, which is evenly constructed in 2-3 layers and sprayed with two coats of FYT-1 waterproof coating.

[0032] like Figure 2-Figure 8As shown, the main body segments 3 are connected by a number of equally spaced connection columns 4. The main body segments 3 include steel plates 5 arranged on both sides of the steel frame, and reserved holes for the connection columns 4 to pass through are reserved on the steel plates 5. The steel frame includes a number of steel layers 6 arranged at equal intervals from bottom to top along the steel plates 5. The steel layers 6 include a number of transverse steel bars 7 and a number of longitudinal steel bars 8 arranged perpendicularly to each other. The transverse steel bars 7 and the longitudinal steel bars 8 are arranged at equal intervals. The two ends of the longitudinal steel bars 8 are welded to the steel plates 5, and the transverse steel bars 7 are laid on the upper layer of the longitudinal steel bars 8. The connection between the transverse steel bars 7 and the longitudinal steel bars 8 is tied and welded by steel wire. The transverse steel bars 7 and the longitudinal steel bars are arranged perpendicularly to each other to form a number of steel grids 9. The steel grids 9 are provided with oblique steel bars 10. The oblique steel bars 10 are used to connect the two vertices of the steel grids 9. The two ends of the oblique steel bars 10 are respectively welded to the connection between the transverse steel bars 7 and the longitudinal steel bars 8. The connecting column 4 includes a plurality of column sections 21 arranged in sequence from top to bottom, an insertion hole 17 is arranged at the bottom end of the column section 21, and an insertion rod 11 is arranged at the top end of the column section 21. A pressing block 12 is slidably arranged at the top end of the insertion rod 11, and an external thread 18 is arranged at the bottom end of the insertion rod 11. Two pop-up blocks 13 are symmetrically arranged on both sides of the bottom end of the pressing block 12, and the pop-up blocks 13 are slidably arranged in the insertion rod 11. A fixed block 14 is arranged in the middle of the two pop-up blocks 13, and both sides of the fixed block 14 are connected to the pop-up blocks 13 through springs 15, and inclined surfaces 16 are arranged at the connection between the pressing block 12 and the pop-up block 13. An annular groove 19 adapted to the pop-up block 13 is arranged at the top end of the insertion hole 17, and an internal thread 18 is arranged at the bottom end of the insertion hole 17, and the insertion rod 11 is connected to the insertion hole 17 through the thread 18.

[0033] Determine the thickness of the bridge deck paving body 1 according to the actual situation, decide the number of layers of the main body segment 3, and then pave the paving body 1 after determination, and pour concrete after paving is completed. When installing the connecting column 4, connect the column segments 21 up and down in sequence, directly insert the insertion rod 11 of the lower column segment 21 into the insertion hole 17 of the upper column segment 21, press the block 12 and push the pop-up block 13 downward, the pop-up block 13 extends outward into the annular groove 19, rotate the column segment 21, the pop-up block 13 slides in the annular groove 19, and the insertion rod 11 and the insertion hole 17 are locked by the thread 18. The number of turns of the thread 18 connecting the insertion rod 11 and the insertion hole 17 is 3-4, which is a small number of turns, easy to tighten, and more convenient to connect.

[0034] Concrete pouring: Formwork: Install the formwork, ensure the linear shape is smooth, and apply release agent on the inside of the formwork.

[0035] Spreading: Use slipform paver or manual spreading, pour in layers (each layer ≤ 30cm), and vibrate to make it dense.

[0036] Leveling: Use a scraper or grinder to level the surface and control the flatness error to ≤3mm.

[0037] Step 5: Cutting and curing: Cut the contraction joints of the paving body 1 according to the design, and cover the concrete with geotextile or film for moisture preservation and curing.

[0038] Cut shrinkage joints at intervals, with the cutting depth being 1 / 3 of the thickness of the main pavement 1, and inject polyurethane sealant. Keep the concrete surface moist for ≥ 7 days during concrete curing.

[0039] Step six, construction of the surface layer 20: paving the asphalt surface layer 20 on the surface of the paving body 1, and performing initial compaction and re-compacting by a road roller, and conducting acceptance after the paving is completed.

[0040] Spread modified asphalt, use double steel wheel roller for initial compaction (1.5~2.0MPa), and rubber wheel roller for secondary compaction.

[0041] Quality Control: Flatness detection: use a 3m ruler, the maximum gap is ≤2mm; Anti-slip value: BPN≥55 when tested by pendulum instrument; Acceptance results: pavement layer thickness error ±3mm, water permeability coefficient ≤50mL / min, full line pass rate 98%.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A construction process for bridge deck paving, characterized in that: The following steps are involved: Step 1, construction preparation: check the flatness, strength and cracks of the bridge deck base, confirm the quality of construction materials, complete the mix ratio design, check the construction equipment, clarify the technical plan, and conduct safety and technical briefings for the operators; Step 2: Base treatment: clean the bridge deck, and perform shot blasting and local repairs; Step 3, measurement and setting out: set the reference line according to the design elevation, calibrate the thickness of the pavement layer, determine the thickness and slope of the pavement layer, and control the paving range; Step 4: Bridge deck paving: the waterproof layer and the main paving layer are paved in sequence, and the bonding layer is paved between each layer. The main paving layer includes several main sections connected in sequence from bottom to top, and the main sections are paved with steel skeletons and poured with concrete; Step 5: Cutting and curing: Cut the contraction joints of the main body of the pavement according to the design, and cover the concrete with geotextile or film for moisture preservation and curing; Step six, surface layer construction: lay the asphalt surface layer on the main surface of the pavement, and use a roller to perform initial and re-compacting, and conduct acceptance after the paving is completed.

2. The construction process for bridge deck paving according to claim 1 is characterized in that: In step one, construction materials include concrete, steel bars, and waterproof materials. During the equipment inspection, the paver, roller, shot blasting machine, and vibrator are debugged to ensure the normal operation of the equipment.

3. The construction process for bridge deck paving according to claim 2 is characterized in that: In step two, when cleaning the bridge deck, remove the floating slurry, oil stains, and loose particles on the bridge deck, rinse the bridge deck base with a high-pressure water gun, use a shot blasting machine to roughen the bridge deck, and use epoxy mortar to fill the honeycomb and hole defects on the bridge deck.

4. The construction process for bridge deck paving according to claim 3 is characterized in that: In step 4, the bonding layer uses polymer modified cement slurry, and the waterproof material uses SBS modified asphalt membrane, which is evenly constructed in 2-3 times, and two coats of FYT-1 waterproof coating are sprayed.

5. The construction process for bridge deck paving according to claim 3 is characterized in that: In step 4, the main body segments are connected by a number of connecting columns arranged at equal intervals. The main body segments include steel plates arranged on both sides of the steel skeleton, and the steel plates are provided with reserved holes for the connecting columns to pass through.

6. The construction process for bridge deck paving according to claim 5 is characterized in that: The steel bar skeleton includes several layers of steel bar layers which are evenly spaced from bottom to top along the steel plate. The steel bar layers include several transverse steel bars and several longitudinal steel bars which are perpendicular to each other. The transverse steel bars and the longitudinal steel bars are evenly spaced. Both ends of the longitudinal steel bars are welded to the steel plate. The transverse steel bars are laid on the upper layer of the longitudinal steel bars. The connection between the transverse steel bars and the longitudinal steel bars is tied and welded by steel wire.

7. The construction process for bridge deck paving according to claim 6 is characterized in that: A number of transverse steel bars and longitudinal steel bars are arranged perpendicularly to each other to form a number of steel bar grids. Oblique steel bars are arranged in the steel bar grids. The oblique steel bars are used to connect the two vertices of the steel bar grid. The two ends of the oblique steel bars are respectively welded to the connection points of the transverse steel bars and the longitudinal steel bars.

8. The construction process for bridge deck paving according to claim 7 is characterized in that: The connecting column includes a plurality of column sections arranged in sequence from top to bottom, an insertion hole is arranged at the bottom end of the column section, an insertion rod is arranged at the top end of the column section, a pressing block is slidably arranged at the top end of the insertion rod, an external thread is arranged at the bottom end of the insertion rod, two pop-up blocks are symmetrically arranged on both sides of the bottom end of the pressing block, the pop-up blocks are slidably arranged in the insertion rod, a fixed block is arranged in the middle of the two pop-up blocks, both sides of the fixed block are connected to the pop-up block by springs, and inclined surfaces are arranged at the connection between the pressing block and the pop-up block; an annular groove matched with the pop-up block is arranged at the top end of the insertion hole, an internal thread is arranged at the bottom end of the insertion hole, and the insertion rod is connected to the insertion hole through threads.

9. The construction process for bridge deck paving according to claim 8 is characterized in that: In step five, cut shrinkage joints at intervals, with a cutting depth of 1 / 3 of the thickness of the main pavement, and inject polyurethane sealant. Keep the concrete surface moist for ≥ 7 days during concrete curing.

10. The construction process for bridge deck paving according to claim 9, characterized in that: In step six, the modified asphalt is spread, and the double steel wheel roller is used for initial compaction, and the rubber wheel roller is used for re-compacting. After completion, the flatness and anti-skid value tests are carried out.

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