A paving method of a two-way six-lane assembled prestressed concrete pavement structure

Abstract

The application discloses a paving method of a bidirectional six-lane assembled prestressed concrete pavement structure, and the paving method comprises the following steps: paving a water-stable base layer; paving an isolation layer; paving a driving lane; further, the step comprises the following steps: prefabricating a road pre-tensioned slab; installing the road pre-tensioned slab; constructing a transverse self-stress joint; constructing a longitudinal self-stress joint; constructing an isolation joint; constructing a temperature joint; paving a left-side curb strip low-grade concrete base layer and a right-side hard shoulder water-stable base layer; paving a left-side curb strip and a right-side hard shoulder asphalt surface layer; and carving a pattern on the driving lane. The assembled prestressed concrete pavement structure paved by the method has large overall rigidity and high durability of each driving lane, the pavement structure design is adapted to the function, and the pavement structure has a long service life and is green and environment-friendly.

Description

Technical Field

[0001] This invention relates to the technical field of road paving, and more specifically, to a method for paving a two-way six-lane precast prestressed concrete pavement structure. Background Technology

[0002] With the rapid development of my country's economy, the volume of heavy traffic is growing faster and faster. Traditional precast prestressed concrete pavements are generally single-lane or two-lane, and there is an urgent need for a multi-lane precast prestressed concrete pavement that can meet the requirements of my country's rapid economic development for heavy traffic.

[0003] A method for laying a two-way six-lane precast prestressed concrete pavement structure is characterized by its structure consisting of a pavement surface layer, an isolation layer, and a water-stabilized base layer. The pavement surface layer is composed of a left curb strip, a temperature joint, a first lane, a longitudinal self-stressing joint, a second lane, an isolation joint, a third lane, a temperature joint, and a right hard shoulder, arranged from left to right. The left curb strip is connected to the first lane by a temperature joint, the first lane and the second lane are connected by a longitudinal self-stressing joint, the second lane and the third lane are connected by an isolation joint, and the third lane and the right hard shoulder are connected by a temperature joint. The first, second, and third lanes are all formed by connecting pre-tensioned slabs with transverse self-stressing joints. This type of precast prestressed concrete pavement has high overall stiffness and durability for each lane, reasonable overall pavement structure stress, lane structure design that is compatible with function, long life cycle, and is environmentally friendly. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a two-way six-lane precast prestressed concrete pavement structure, characterized in that the pavement structure comprises three parts: a left curb strip, a driving lane, and a right hard shoulder; wherein: The driving lanes include driving lane one, driving lane two and driving lane three, all of which are formed by connecting the road pre-tensioned slab with transverse self-stressing joints; the transverse self-stressing joints are composed of transverse self-stressing joint transverse reinforcement, transverse self-stressing joint longitudinal reinforcement and high expansion concrete; the road pre-tensioned slabs are composed of steel strands, road pre-tensioned slab transverse reinforcement and concrete. The connection method between the left curb, the driving lane and the right hard shoulder is as follows: the left curb and driving lane one are connected by a temperature joint, driving lane one and driving lane two are connected by a longitudinal self-stressing joint, driving lane two and driving lane three are connected by a separation joint, and driving lane three and the right hard shoulder are connected by a temperature joint.

[0005] According to a preferred embodiment of the present invention, the longitudinal self-stressing joint is composed of longitudinal self-stressing joint transverse reinforcement, longitudinal self-stressing joint longitudinal reinforcement and expansive concrete, the temperature joint is composed of asphalt coated on the side of the road pre-tensioned slab, and the isolation joint is filled with asphalt sand and compacted.

[0006] According to another preferred embodiment of the present invention, the dimensions of the pre-tensioned slab for road use are: 7m-9m in length, 3.5m-3.75m in width, and 20cm-24cm in thickness; the concrete grade is 35MPa-45MPa; the diameter of the steel strand is 12.7mm; and the transverse reinforcement of the pre-tensioned slab for road use consists of double-row secondary steel bars with a diameter of 16mm-18mm.

[0007] According to another preferred embodiment of the present invention, the transverse self-stressing joint is 20cm-30cm wide, 20cm-24cm high, and 3.5m-3.75m long, with a grade of 35MPa-45MPa and a 90-day longitudinal self-stress value of 3MPa-5MPa; the longitudinal reinforcement of the transverse self-stressing joint is a double row of grade II steel bars with a diameter of 16mm-18mm and a transverse spacing of 15cm-20cm.

[0008] According to another preferred embodiment of the present invention, the dimensions of the longitudinal self-stressing joint are: 8cm-12cm wide and 20cm-24cm high; the strength of the concrete is 35MPa-45MPa; the 90-day transverse self-stress value is 2MPa-3MPa; and the transverse reinforcement of the longitudinal self-stressing joint is a double row of grade II steel bars with a diameter of 16mm-18mm and a longitudinal spacing of 40cm-50cm.

[0009] According to another preferred embodiment of the present invention, the width of the isolation joint is 5cm-7cm and the height is 20cm-24cm.

[0010] According to another preferred embodiment of the present invention, the grade of the low-grade concrete base course of the left curb is 15-20 MPa; the 7-day compressive strength of the water-stabilized base course of the right hard shoulder is 3-5 MPa.

[0011] According to another preferred embodiment of the present invention, the thickness of the asphalt surface layer of the left curb and the right hard shoulder is 5cm-8cm.

[0012] According to another aspect of the present invention, a construction method for a two-way six-lane precast prestressed concrete pavement structure is provided, wherein the method includes the following steps: Step S101: Laying of water-stabilized base course; Step S102, laying of the isolation layer; Step S103, laying the driving lane; further, this step includes: Step S103-1, prefabrication of pre-stressed slabs for road construction; Step S103-2, install the pre-tensioned plate for the road; Step S103-3, Construction of transverse self-stressing joint; Step S103-4, Construction of longitudinal self-stressing joint; Step S103-5, construction of the isolation joint; Step S104, construction of temperature joints; Step S105: Lay low-grade concrete base course on the left curb; Step S106: Laying of water-stabilized base course on the right hard shoulder; Step S107: Laying asphalt surface layer on the left curb; Step S108: Laying the asphalt surface layer on the right hard shoulder; Step S109, lane marking.

[0013] According to a preferred embodiment of the present invention, step S102 further includes: Step S102-1, the emulsified asphalt tack coat is sprayed on the water-stabilized base course, and the spraying time is 2-4 hours after the final compaction of the water-stabilized base course is completed. Step S102-2, the application of hot bitumen seal coat onto tack coat, the application time... It takes 7-10 days after the tack coat is completed; Step S102-3: Lay asphalt concrete on the hot asphalt seal layer, with an asphalt layer thickness of 3cm-5cm.

[0014] According to another preferred embodiment of the present invention, step S103-1 further includes: Step S103-1-1, tensioning of the steel strand; Step S103-1-2: Tie the transverse reinforcement bars of the pre-tensioned slab to the spiral anchor bars; Step S103-1-3: Pour the pre-tensioned concrete for the road; Step S103-1-4, health maintenance for 5-7 days; Step S103-1-5: Unwinding the steel strand.

[0015] According to another preferred embodiment of the present invention, step S103-3 further includes: Step S103-3-1: Tie the transverse self-stressing joint horizontal reinforcement and the transverse self-stressing joint longitudinal reinforcement. Step S103-3-2: Pour high-expansion concrete; Step S103-3-3, water conditioning for 7 days.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The roadway of the present invention is formed by connecting pre-tensioned slabs with transverse self-stressing joints. The roadway connected by self-stressing joints has high overall rigidity and strong load-bearing capacity. 2. Lane 1 and Lane 2 are connected by a longitudinal self-stressing joint, and the overall transverse stress of the two lanes is reasonable. Lane 2 and Lane 3 are connected by a separation joint. Since the rigid connection width of the lanes does not exceed two lanes, there is no need to lay transverse prestressing. The process is simple and the cost is low. 3. The left-side curb and right-side hard shoulder adopt a non-prestressed pavement design. This type of pavement structure has advantages such as reasonable stress distribution, lane structure design and function matching, prefabricated construction, low cost, long life cycle, and green environmental protection. Attached Figure Description

[0017] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a plan view of a two-way six-lane precast prestressed concrete pavement structure according to the present invention; Figure 2 This is a cross-sectional view (II) of a two-way six-lane precast prestressed concrete pavement structure according to the present invention. Figure 3 This is section II-II of a two-way six-lane precast prestressed concrete pavement structure according to the present invention; Figure 4 The diagram shown is a flowchart illustrating a specific embodiment of a method for laying a two-way six-lane precast prestressed concrete pavement structure according to the present invention.

[0018] The relevant labels in the figure are as follows: 1. Left curb; 2. Lane 1; 3. Lane 2; 4. Lane 3; 5. Right hard shoulder; 6. Transverse self-stressing joint; 7. Longitudinal self-stressing joint; 8. Temperature joint; 9. Steel strand; 10. Transverse reinforcement of pre-tensioned slab for road use; 11. Transverse reinforcement of longitudinal self-stressing joint; 12. Longitudinal reinforcement of longitudinal self-stressing joint; 13. Expansion concrete; 14. Water-stabilized base course; 15. Low-grade concrete base course; 16. Asphalt surface course of left curb; 17. Concrete; 18. Transverse reinforcement of self-stressing joint; 19. Longitudinal reinforcement of transverse self-stressing joint; 20. High-expansion concrete; 21. Isolation layer; 22. Pre-tensioned slab for road use; 23. Isolation joint; 24. Asphalt surface course of right hard shoulder; 25. Water-stabilized base course of right hard shoulder. Detailed Implementation

[0019] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the invention.

[0020] See Figure 1-3 As shown, Figure 1 This is a plan view of a two-way six-lane precast prestressed concrete pavement structure according to the present invention; Figure 2 This is a cross-sectional view (II) of a two-way six-lane precast prestressed concrete pavement structure according to the present invention. Figure 3 This is section II-II of a two-way six-lane precast prestressed concrete pavement structure according to the present invention; Figure 1-3 The specific positional and connection relationships of a two-way six-lane precast prestressed concrete pavement structure according to the present invention are shown, wherein: The road structure comprises three parts: the left curb strip 1, the driving lanes 2-4, and the right hard shoulder 5; wherein: The driving lanes include driving lane 1 (2), driving lane 2 (3), and driving lane 3 (4), all of which are formed by connecting the road prestressed slab 22 with transverse self-stressing joints 6; the transverse self-stressing joint 6 is composed of transverse self-stressing joint transverse reinforcement 18, transverse self-stressing joint longitudinal reinforcement 19, and high-expansion concrete 20; the road prestressed slab 22 is composed of steel strands 9, road prestressed slab transverse reinforcement 10, and concrete 17. The connection between the left curb 1, the driving lanes 2-4 and the right hard shoulder 5 is as follows: the left curb 1 is connected to the driving lane 2 by a temperature joint 8, the driving lane 2 is connected to the driving lane 3 by a longitudinal self-stress joint 7, the driving lane 3 is connected to the driving lane 4 by a separation joint 23, and the driving lane 4 is connected to the right hard shoulder 5 by a temperature joint 8.

[0021] The longitudinal self-stressing joint 7 is composed of longitudinal self-stressing joint transverse reinforcement 11, longitudinal self-stressing joint longitudinal reinforcement 12 and expansive concrete 13. The temperature joint 8 is composed of asphalt coated on the side of the road pre-tensioned slab. The isolation joint 23 is filled with asphalt sand and compacted.

[0022] Preferably, the dimensions of the pre-stressed slab for road use are: 7m-9m in length, 3.5m-3.75m in width, and 20cm-24cm in thickness; the concrete grade is 35MPa-45MPa; the diameter of the steel strand is 12.7mm; and the transverse reinforcement of the pre-stressed slab for road use consists of double-row, grade II steel bars with a diameter of 16mm-18mm.

[0023] More preferably, the transverse self-stressing joint is 20cm-30cm wide, 20cm-24cm high, and 3.5m-3.75m long, with a grade of 35MPa-45MPa and a 90-day longitudinal self-stress value of 3MPa-5MPa; the longitudinal reinforcement of the transverse self-stressing joint is a double row of grade II steel bars with a diameter of 16mm-18mm, and a transverse spacing of 15cm-20cm.

[0024] Preferably, the dimensions of the longitudinal self-stressing joint are: 8cm-12cm wide and 20cm-24cm high; the concrete strength is 35MPa-45MPa; the 90-day transverse self-stress value is 2MPa-3MPa; and the longitudinal self-stressing joint reinforcement consists of double-row secondary steel bars with a diameter of 16mm-18mm and a longitudinal spacing of 40cm-50cm.

[0025] More preferably, the width of the isolation joint is 5cm-7cm and the height is 20cm-24cm.

[0026] Preferably, the low-grade concrete base course of the left curb strip has a grade of 15-20 MPa; the 7-day compressive strength of the water-stabilized base course of the right hard shoulder is 3-5 MPa.

[0027] More preferably, the thickness of the asphalt surface layer of the left curb and the right hard shoulder is 5cm-8cm.

[0028] It should be noted that the dimensions and shapes of the specific components and structures described above in this invention were obtained through extensive experiments and tests during actual construction, rather than being subjectively or arbitrarily set. They are the result of a great deal of labor by the inventors and have specific practical applications and value.

[0029] See Figure 4 This invention provides a method for laying a two-way six-lane precast prestressed concrete pavement structure, the method comprising: Step S101, according to Figure 1-3 The structure shown is used for laying a water-stabilized base course 14.

[0030] First, moisten the subbase with clean water, then set up the base course steel formwork. A paver then lays the cement-stabilized crushed stone material. The cement-stabilized base course (Type 14) should be 18cm-27cm thick, with preferred thicknesses of 18cm, 20cm, 25cm, and 27cm. The 7-day strength of the cement-stabilized base course (Type 14) should be 3MPa-5MPa, with preferred strengths of 3MPa, 4MPa, and 5MPa. Finally, compact the material using a vibratory roller in conjunction with a rubber-tired roller.

[0031] Step S102, according to Figure 1-3 The structure shown is equipped with an isolation layer 21.

[0032] Two to four hours after the final compaction of the water-stabilized base course 14, apply an emulsified asphalt tack coat to the base course 14 at a rate of 1.3L / m²-1.5L / m², with 1.5L / m² being the preferred rate. Allow the tack coat to cure for 7 to 10 days. Then, apply a hot asphalt seal coat on top of the tack coat at a rate of 1kg / m²-1.2kg / m², with 1.1kg / m² and 1.2kg / m² being the preferred rates. Finally, lay asphalt concrete on top of the hot asphalt seal coat, with an asphalt layer thickness of 3cm-5cm.

[0033] Step S103, according to Figure 1-3 The structure shown is used for laying lanes 2-4.

[0034] Furthermore, this step includes: Step S103-1, prefabricate the prestressed slab 22 for the road; The pre-tensioned slab 22 for road use is composed of steel strands 9, transverse reinforcing bars 10, and concrete 17. Its dimensions are: length 7m-9m, preferably 8m or 9m; width 3.5m-3.75m, preferably 3.5m or 3.75m; thickness 20cm-24cm, preferably 20cm, 22cm, or 24cm.

[0035] The prefabrication step S103-1 of the pre-stressed slab 22 for road use further includes: Step S103-1-1, tensioning of steel strand 9; The steel strand 9 has a diameter of 12.7mm and is positioned 1cm-3cm below the centerline of the cross-section of the pre-tensioned slab 22, with a lateral spacing of 15cm-30cm. The preferred spacings are 15cm, 18cm, 20cm, 25cm, and 30cm. The steel strand 9 is tensioned in three stages according to the design stress levels of 30%, 80%, and 100%, with a 10-minute pause after each tensioning.

[0036] Step S103-1-2: The transverse reinforcement 10 of the pre-tensioned slab for road use is tied to the spiral anchor reinforcement. The transverse reinforcement 10 of the pre-tensioned slab for road use is a double-row secondary steel bar with a diameter of 16mm-18mm. The longitudinal spacing of the steel bars is 50cm-70cm, and the preferred spacing is 50cm-70cm. Step S103-1-3: Pour pre-tensioned concrete 17 for road use; the concrete grade is 35mpa-45mpa, with the preferred grades being 35mpa and 40mpa.

[0037] Step S103-1-4, health maintenance for 5-7 days; Step S103-1-5, releasing the steel strand 9; the steel strand is released in four stages according to the design stress levels of 80%, 60%, 30%, and 0, with each stage pausing for 10 minutes.

[0038] Step S103-2, according to Figure 1-3 The structure shown is used for the installation of the pre-tensioned plate 22; First, install lane 2. Use a crane and manual labor to install the pre-tensioned slabs 22. Leave space for transverse self-stressing joints 6 between the longitudinal slabs, with a spacing of 20cm-30cm, preferably 20cm, 22cm, or 25cm. Next, install lane 3. Leave space for longitudinal self-stressing joints between lane 2 and lane 3, with a spacing of 8cm-12cm, preferably 10cm or 12cm. Finally, install lane 4. Leave space for isolation joints 23 between lane 3 and lane 4, with a spacing of 5cm-7cm, preferably 5cm or 7cm.

[0039] Step S103-3, according to Figure 1-3 The structure shown is constructed with transverse self-stressing joint 6. Step S103-3 Laying method, characterized in that step S103-3 further includes: Step S103-3-1: Tie the transverse self-stressing horizontal bars 18 and the transverse self-stressing joint longitudinal bars 19. The transverse self-stressing joint longitudinal bars 19 are double-row grade II steel bars with a diameter of 16mm-18mm and a transverse spacing of 15cm-20cm; the preferred spacing is 15cm and 20cm. Step S103-3-2, according to Figure 1-3 The structure shown is poured with high-expansion concrete 20; the grade of high-expansion concrete 20 is 35 MPa-45 MPa, the preferred grades are 35 MPa and 40 MPa; the longitudinal self-stress value at 90 days is 3 MPa-5 MPa; Step S103-3-3, Water therapy for 7 days Step S103-4, according to Figure 1-3 The structure shown is constructed with longitudinal self-stressing joint 7. Seven days after pouring the transverse self-stressing joint 6, the longitudinal self-stressing joint 7 is constructed. First, the transverse reinforcement 11 and longitudinal reinforcement 12 of the longitudinal self-stressing joint are tied. The transverse reinforcement 11 consists of double-row, grade II steel bars with a diameter of 16mm-18mm, spaced 40cm-50cm apart, with preferred spacing of 40cm, 45cm, and 50cm. Formwork is erected on both sides of the longitudinal self-stressing joint 7, and the concrete on both sides of the joint is thoroughly moistened with water. Expansion concrete 13 is then poured, with a grade of 35MPa-45MPa, preferably 40MPa and 45MPa. Finally, it is water-cured for 7 days. The content of high-efficiency expansive agent in the expansion concrete 13 is between 8% and 10%. After 90 days, the transverse self-stress value of the longitudinal self-stressing joint 7 is 2MPa-3MPa.

[0040] Step S103-5, according to Figure 1-3 The structure shown is used for the construction of isolation joint 23; First, clean up the debris in the isolation joint, fill the isolation joint with asphalt sand, level it manually, and finally compact it with a small road roller.

[0041] Step S104, according to Figure 1-3 The structure shown is used for the construction of temperature joint 8.

[0042] After the installation of lane 1-2 and lane 3-4 is completed, the transverse self-stressing joint 6 and the longitudinal self-stressing joint 7 are poured one after another. Finally, asphalt is applied to the inside of the outer side of lane 1-2 and lane 3-4 with a thickness of not less than 3mm.

[0043] Step S105, according to Figure 1-3 The structure shown is used for laying a low-grade concrete base course of 15 on the left side of the roadside curb.

[0044] The left curb strip 1 consists of a low-grade concrete base layer 15 and an asphalt surface layer 16. First, water is sprinkled on the corresponding isolation layer 21 of the left curb strip 1 to fully moisten it. Then, low-grade concrete is poured, vibrated to compact it, and leveled. Finally, it is covered with moisturizing cotton for 3-5 days to complete the laying of the low-grade concrete base layer 15. The concrete strength is 15-20 MPa, with the preferred strengths being 15 MPa and 20 MPa.

[0045] Step S106, according to Figure 1-3 The structure shown is used for laying the water-stabilized base course 24 on the right hard shoulder.

[0046] The right hard shoulder 5 consists of a right hard shoulder water-stabilized base course 25 and a right hard shoulder asphalt surface course 24. First, water is sprinkled on the corresponding isolation layer 21 of the right hard shoulder 5 to make it fully wet. Then, a small paver lays water-stabilized crushed stone, and a vibratory roller is used in conjunction with a rubber-tired roller to compact it. Finally, it is covered with moisturizing cotton for 7-10 days to complete the laying of the right hard shoulder water-stabilized base course 25. The 7-day strength of the water-stabilized base course is 3-5 MPa, with the preferred grades being 3 MPa, 4 MPa, and 5 MPa.

[0047] Step S107, according to Figure 1-3 The structure shown is used for asphalt paving of the left curb strip.

[0048] Apply a tack coat to the low-grade concrete base layer (15); pave with a small asphalt paver and compact the asphalt concrete surface layer with a double-drum vibratory roller; the asphalt surface layer thickness is 5cm-8cm.

[0049] Step S108, according to Figure 1-3 The structure shown is used for laying the asphalt pavement on the right hard shoulder.

[0050] Apply tack coat to the 25mm thick water-stabilized base course on the right hard shoulder; pave with an asphalt paver and compact the asphalt concrete surface layer with a dual-drum vibratory roller; the asphalt surface layer thickness is 5cm-8cm.

[0051] Step S109, according to Figure 1-3 The structure shown has 2-4 grooves for the driving lane.

[0052] On lanes 2-4, the engraving machine performs transverse engraving perpendicular to the direction of travel, with a depth of 4mm-5mm and a spacing of 15mm-25mm.

[0053] It should be noted that the dimensions and shapes of the specific components and structures described above in this invention were obtained through extensive experiments and tests during actual construction, rather than being subjectively or arbitrarily set. They are the result of a great deal of labor by the inventors and have specific practical applications and value.

[0054] While exemplary embodiments and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made to these embodiments without departing from the spirit of the invention and the scope of protection defined by the appended claims. For other examples, those skilled in the art should readily understand that the order of process steps can be varied while remaining within the scope of the invention.

[0055] Furthermore, the scope of this invention is not limited to the processes, mechanisms, manufacturing methods, material compositions, means, methods, and steps of the specific embodiments described in the specification. From the disclosure of this invention, those skilled in the art will readily understand that any existing or future processes, mechanisms, manufacturing methods, material compositions, means, methods, or steps that perform substantially the same function or obtain substantially the same results as the corresponding embodiments described in this invention can be applied according to this invention. Therefore, the appended claims are intended to include these processes, mechanisms, manufacturing methods, material compositions, means, methods, or steps within their scope of protection.

Claims

1. A two-way six-lane precast prestressed concrete pavement structure, characterized in that, The road structure comprises three parts: a left curb strip, a driving lane, and a right hard shoulder; wherein: The driving lanes include driving lane one, driving lane two and driving lane three, all of which are formed by connecting the road pre-tensioned slab with transverse self-stressing joints; the transverse self-stressing joints are composed of transverse self-stressing joint transverse reinforcement, transverse self-stressing joint longitudinal reinforcement and high expansion concrete; the road pre-tensioned slabs are composed of steel strands, road pre-tensioned slab transverse reinforcement and concrete. The connection method between the left curb, the driving lane and the right hard shoulder is as follows: the left curb and the first driving lane are connected by a temperature joint, the first driving lane and the second driving lane are connected by a longitudinal self-stressing joint, the second driving lane and the third driving lane are connected by a separation joint, and the third driving lane and the right hard shoulder are connected by a temperature joint. The longitudinal self-stressing joint is composed of longitudinal self-stressing joint transverse reinforcement, longitudinal self-stressing joint longitudinal reinforcement and expansive concrete; the temperature joint is composed of asphalt coated on the side of the road pre-tensioned slab; and the isolation joint is filled with asphalt sand and compacted. The left curb is composed of a low-grade concrete base course and an asphalt surface course; the right hard shoulder is composed of a water-stabilized base course and an asphalt surface course.

2. The two-way six-lane precast prestressed concrete pavement structure as described in claim 1, wherein, The dimensions of the pre-stressed slab for road use are: 7m-9m in length, 3.5m-3.75m in width, and 20cm-24cm in thickness. The diameter of the steel strand is 12.7mm. The transverse reinforcement of the pre-stressed slab for road use consists of double rows of grade II steel bars with a diameter of 16mm-18mm.

3. The two-way six-lane precast prestressed concrete pavement structure as described in claim 1, wherein, The transverse self-stressing joint is 20cm-30cm wide, 20cm-24cm high, and 3.5m-3.75m long. The longitudinal reinforcement of the transverse self-stressing joint is a double row of grade II steel bars with a diameter of 16mm-18mm and a transverse spacing of 15cm-20cm.

4. The two-way six-lane precast prestressed concrete pavement structure as described in claim 1, wherein, The dimensions of the longitudinal self-stressing joint are: 8cm-12cm wide and 20cm-24cm high. The longitudinal self-stressing joint transverse reinforcement consists of double rows of grade II steel bars with a diameter of 16mm-18mm and a longitudinal spacing of 40cm-50cm.

5. The two-way six-lane precast prestressed concrete pavement structure as described in claim 1, wherein, The isolation joint has a width of 5cm-7cm and a height of 20cm-24cm.

6. The two-way six-lane precast prestressed concrete pavement structure as described in claim 1, wherein, The low-grade concrete base course of the left curb has a grade of 15-20 MPa; the water-stabilized base course of the right hard shoulder has a 7-day compressive strength of 3-5 MPa.

7. The two-way six-lane precast prestressed concrete pavement structure as described in claim 1, wherein, The thickness of the asphalt surface layer of the left curb and the right hard shoulder is 5cm-8cm.

8. A construction method for a two-way six-lane precast prestressed concrete pavement structure as described in any one of claims 1-7, wherein, The method includes the following steps: Step S101: Laying of water-stabilized base course; Step S102, laying of the isolation layer; Step S103, laying the driving lane; further, this step includes: Step S103-1, prefabrication of pre-stressed slabs for road construction; Step S103-2, install the pre-tensioned plate for the road; Step S103-3, Construction of transverse self-stressing joint; Step S103-4, Construction of longitudinal self-stressing joint; Step S103-5, construction of the isolation joint; Step S104, construction of temperature joints; Step S105: Lay low-grade concrete base course on the left curb; Step S106: Laying of water-stabilized base course on the right hard shoulder; Step S107: Laying asphalt surface layer on the left curb; Step S108: Laying the asphalt surface layer on the right hard shoulder; Step S109, lane marking.

9. The construction method for a two-way six-lane precast prestressed concrete pavement structure as described in claim 8, wherein, Step S102 further includes: Step S102-1: Spray emulsified asphalt tack coat on the water-stabilized base course. The spraying time is 2-4 hours after the final compaction of the water-stabilized base course. Step S102-2: Apply hot bitumen seal coat over the tack coat for 7-10 days after the tack coat is applied. Step S102-3: Lay asphalt concrete on the hot asphalt seal layer, with an asphalt layer thickness of 3cm-5cm.

10. The construction method of the two-way six-lane precast prestressed concrete pavement structure as described in claim 8, wherein, Step S103-1 further includes: Step S103-1-1, tensioning of the steel strand; Step S103-1-2: Tie the transverse reinforcement bars of the pre-tensioned slab to the spiral anchor bars; Step S103-1-3: Pour the pre-tensioned concrete for the road; Step S103-1-4, health maintenance for 5-7 days; Step S103-1-5: Unwinding the steel strand.

11. The construction method of the two-way six-lane precast prestressed concrete pavement structure as described in claim 8, wherein, Step S103-3 further includes: Step S103-3-1: Tie the transverse self-stressing joint horizontal reinforcement and the transverse self-stressing joint longitudinal reinforcement. Step S103-3-2: Pour high-expansion concrete; Step S103-3-3, water conditioning for 7 days.

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