A road construction method for relocating and reconstructing a market town

Abstract

The invention discloses a method for constructing a road in a relocated town, including the steps of surveying and laying out, roadbed construction, graded crushed stone cushion construction, concrete stabilization layer construction, and road surface concrete layer construction. The method of the invention processes the roadbed, and then constructs the graded crushed stone cushion, concrete stabilization layer, and road surface concrete layer in the structural order, which can ensure the construction quality, and the road has a smooth appearance, no wheel marks, good joints, and good compaction quality, and is suitable for relocating roads in towns; the rod positioning device of the invention can be installed with multiple sliders, that is, multiple positioning tubes, as needed, which is convenient for installing and positioning rods, and does not require punching holes in the template, and has the advantages of convenient and flexible operation.

Description

Technical Field

[0001] The invention belongs to the technical field of road construction, and in particular relates to a method for constructing roads within a relocated town. Background Art

[0002] The Jinsha River Baihetan Hydropower Station is located on the boundary river between Ningnan County, Sichuan Province and Qiaojia County, Yunnan Province, in the lower reaches of the Jinsha River, 41km away from Qiaojia County. It is the second cascade hydropower station in the lower reaches of the Jinsha River. The power station is connected to the Wudongde cascade above and the Xiluodu cascade below (195km away from the Xiluodu Hydropower Station), with a controlled basin area of ​​430,300 km 2 (accounting for 91.0% of the Jinsha River basin area). The average annual flow at the dam site is 4190m 3 / s, with an average annual runoff of 132.1 billion m 3 When the normal water level of the reservoir is 825m, the corresponding reservoir flat water area is 216.49km 2 , with a total storage capacity of 20.627 billion m 3 , regulating reservoir capacity 10.436 billion m 3 , flood control storage capacity 7.5 billion m 3 The main stream backwater length is about 182km (to the Wudongde dam site). The Baihetan Hydropower Station involves resettlement projects, which have many difficulties such as multiple project sites, tight construction period, difficult coordination, and difficult transportation organization. Among them, the relocation of the town roads is one of the main projects. The internal roads include main roads, secondary roads, and residential roads. Therefore, the construction quality of the internal roads is high. For this reason, it is very necessary to develop a high-quality construction method suitable for the relocation of town roads. Summary of the invention

[0003] The purpose of the invention is to provide a road construction method for relocating and building a town.

[0004] The object of the present invention is achieved by comprising the following steps:

[0005] S1. Surveying and setting out: laying out the center line and contour line of the road according to the guide wire and elevation control points and setting control stakes;

[0006] S2, roadbed construction: according to step S1, lay out the lines and control piles, clean up the debris within the roadbed, then excavate the roadbed, and then dig drainage ditches on both sides of the roadbed. After the roadbed is dried, roll it;

[0007] S3. Construction of graded crushed stone cushion layer: mix sand with particle size ≤4.75mm, crushed stone with particle size 4.75mm<≤9.5mm, crushed stone with particle size 9.5mm<≤19mm, and crushed stone with particle size 19mm<≤37.5mm to obtain a mixture, spread the mixture evenly on the roadbed with a loose thickness of 24cm, then roll it from both sides of the roadbed to the center 1-2 times, and then vibrate and roll it 6-8 times to form a graded crushed stone cushion layer;

[0008] S4. Construction of concrete stabilization layer: Set steel formwork on both sides of the graded gravel cushion for support. Sprinkle water on the graded gravel cushion before spreading the concrete stabilization layer mixture. Then spread the concrete stabilization layer mixture evenly on the graded gravel cushion, and then roll it 6 to 8 times. Keep the concrete stabilization layer mixture moist during the rolling process to form a concrete stabilization layer. After rolling, perform maintenance immediately.

[0009] S5. Construction of pavement concrete layer: lay the formwork on the concrete stabilization layer, and apply the release agent on the side where the formwork contacts the pavement concrete mixture; pour the pavement concrete mixture on the concrete stabilization layer, and then use the leveling machine to level it in sections according to the working unit, and use the inserted vibrator to vibrate while leveling. The length of the working unit is 20 to 30 meters. The leveling machine adopts the forward vibration and backward static rolling method in each working unit, rolling 2 to 3 times; then static rolling for 1 to 3 times; after the concrete solidifies, remove the formwork to form the pavement concrete layer, and then cut the expansion joints on the pavement concrete layer, and then carve the grooves; clean the expansion joints, and then fill the expansion joints with polyurethane caulking materials.

[0010] The present invention has the following technical effects: the method of the present invention processes the roadbed, and then constructs in the structural order of graded crushed stone cushion layer, concrete stabilization layer and pavement concrete layer, which can ensure the construction quality, and the road appearance is smooth, without wheel marks, the joints are good, and the compaction quality is good, which is suitable for the relocation and construction of roads in towns; the rod positioning device of the present invention can install multiple sliders, that is, multiple positioning tubes, as needed, which is convenient for installing and positioning rods, and there is no need to punch holes in the template, which has the advantages of easy and flexible operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0012] Figure 2 It is a structural schematic diagram of the template and rod positioning device;

[0013] Figure 3 for Figure 2 Schematic diagram of the left view structure;

[0014] Figure 4 It is a schematic diagram of the top structure of the upper template and the upper tongue plate;

[0015] Figure 5 is a schematic diagram of the structure of the flexible sealing layer;

[0016] In the figure: 1-upper template, 2-lower template, 3-flexible sealing layer, 3a-sealing block, 3b-sealing strip, 3c-rod hole, 4-upper tongue plate, 5-lower tongue plate, 6-sliding table, 7-fixing table, 8-positioning rod, 9-fixing nut, 10-positioning tube, 11-T-shaped protrusion, 12-T-shaped slide groove, 13-slot hole, 14-rod. 15-fixing bolt. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or substitutions made based on the teachings of the present invention belong to the protection scope of the present invention.

[0018] As attached Figure 1 to Figure 5 The present invention shown comprises the following steps:

[0019] S1. Surveying and setting out: laying out the center line and contour line of the road according to the guide wire and elevation control points and setting control stakes;

[0020] S2, roadbed construction: according to step S1, lay out the lines and control piles, clean up the debris within the roadbed, then excavate the roadbed, and then dig drainage ditches on both sides of the roadbed. After the roadbed is dried, roll it;

[0021] S3. Construction of graded crushed stone cushion: mix sand with particle size ≤4.75mm, crushed stone with particle size 4.75mm<≤9.5mm, crushed stone with particle size 9.5mm<≤19mm, and crushed stone with particle size 19mm<≤37.5mm to obtain a mixture, spread the mixture evenly on the roadbed with a loose thickness of 24cm, then roll it from both sides of the roadbed to the center 1-2 times, and then vibrate and roll it 6-8 times to form a graded crushed stone cushion. The surface of the graded crushed stone cushion is flat and dense, the edges are neat, and there is no looseness;

[0022] S4. Construction of concrete stabilization layer: Set steel formwork on both sides of the graded gravel cushion for support. Sprinkle water on the graded gravel cushion before spreading the concrete stabilization layer mixture. Then spread the concrete stabilization layer mixture evenly on the graded gravel cushion, and then roll it 6 to 8 times. Keep the concrete stabilization layer mixture moist during the rolling process to form a concrete stabilization layer. After rolling, perform maintenance immediately.

[0023] S5. Construction of pavement concrete layer: lay the formwork on the concrete stabilization layer, apply the release agent on the side of the formwork that contacts the pavement concrete mixture; pour the pavement concrete mixture on the concrete stabilization layer, and then use the leveling machine to level it in sections according to the operation unit, and use the inserted vibrating rod to vibrate while leveling. The length of the operation unit is 20 to 30 meters. The leveling machine uses the forward vibration and backward static rolling method in each operation unit, rolling 2 to 3 times; then static rolling is used for leveling 1 to 3 times; after the concrete solidifies, the formwork is removed to form the pavement concrete layer. The demoulding process must not damage the corners of the pavement concrete layer and the pavement concrete layer around the force transfer rods and tie rods, and must not cause the force transfer rods and tie rods to loosen or deform; then cut expansion joints on the pavement concrete layer, the expansion joint gaps are uniform and the seams are straight, and the expansion joints are promptly watered and maintained after cutting, and then engraved. The engraving is done using an engraving machine, the lines are straight, the straight line joints are not misaligned, the engraving depth is consistent, and the direction is coordinated with the transverse joints; clean the expansion joints, and then fill them with polyurethane caulking materials until they are full, dense, uniform, and of uniform thickness.

[0024] Preferably, the concrete stabilization layer mixture in step S4 is obtained by mixing according to a mass ratio.

[0025] Preferably, during the rolling in step S4, the road is rolled from the shoulders on both sides toward the center of the road in a straight section; and the road is rolled from the inner shoulder toward the outer shoulder in a flat curve section.

[0026] Preferably, at the end of each day's construction in step S4, the end of the construction is rolled into a slope, and before paving a new concrete stabilization layer mixture the next day, the end slope is excavated and excavated into a vertical downward section, which is perpendicular to the center line of the road.

[0027] Preferably, the pavement concrete mixture in step S5 is obtained by mixing cement, sand, gravel, water and admixture in a mass ratio of 1:2.3-2.4:3.9-4.0:0.4-0.5:0.007-0.009.

[0028] Preferably, the maintenance in step S4 is to cover the concrete stabilization layer with a geotextile and then sprinkle water on the geotextile.

[0029] Preferably, step S5 also includes a rod positioning device when laying the template, the template includes an upper template 1 and a lower template 2, a flexible sealing layer 3 is provided between the upper template 1 and the lower template 2, an upper tongue plate 4 is fixedly provided on the top of the upper template 1, and a lower tongue plate 5 corresponding to the upper tongue plate 4 is fixedly provided on the top of the lower template 2, the rod positioning device includes a slide 6, a fixed platform 7, a positioning rod 8, a fixing nut 9, and a positioning tube 10, one side of the slide 6 is in contact with the end of the lower tongue plate 5, and a T-shaped protrusion 11 is provided on the side of the slide 6, and a T-shaped groove 12 is provided at the end of the lower tongue plate 5, and the T-shaped protrusion 11 is slidably matched with the T-shaped groove 12, and the two sides of the slide 6 A fixing platform 7 is fixed on each side, and a slot 13 running through the upper and lower parts is provided on the upper tongue plate 4 opposite to the fixing platform 7. The lower end of the positioning rod 8 passes through the fixing platform 7, and a limit plate is provided at the lower end, and the upper end passes through the slot 13. A threaded structure is provided at the upper end of the positioning rod 8. The fixing nut 9 is arranged on the threaded structure of the positioning rod 8, and the fixing nut 9 is in close contact with the top of the upper tongue plate 4. The positioning tube 10 is fixed on the top of the slide 6, and the rod 14 passes through the positioning tube 10 and the flexible sealing layer 3; the rod 14 is a force transmission rod or a pull rod, the force transmission rod is arranged across the transverse joint, and the force transmission rod is parallel to the driving direction of the road surface, and the pull rod is arranged across the longitudinal joint, and the pull rod is perpendicular to the driving direction of the road surface.

[0030] Preferably, the force transmission rod is round steel and the pull rod is threaded steel.

[0031] Preferably, the flexible sealing layer 3 includes a sealing block 3a and a sealing strip 3b. The sealing block 3a is provided with a rod hole 3c, and the rod 14 passes through the rod hole 3c. The sealing strip 3b is provided on both sides of the sealing block 3a, and the rod 14 passes through the rod hole 3c. The sealing strip 3b can be installed after the sealing block 3a is installed.

[0032] Preferably, the rod 14 is provided with a plurality of inverted U-shaped positioning anchors to limit the position of the rod 14 .

[0033] Preferably, a through hole penetrating the slide 6 and the T-shaped protrusion 11 is provided on the front side of the slide 6, the through hole is provided with an internal thread, and the through hole is provided with a fixing bolt 15, and the slide 6 is further braked by tightening the fixing bolt 15.

[0034] The working principle and working process of the rod positioning device are as follows: first, lay and install the lower template 2, then move the slide 6 with the positioning rod 8 from one end of the T-shaped slide groove 12, and insert the T-shaped protrusion into the T-shaped slide groove 12, so that the slide 6 can slide at the end of the lower tongue plate 5, and install several slides 6 respectively and slide them to the specified position, and then install the flexible sealing layer and the upper template 1. At the same time, make the upper end of the positioning rod 8 pass through the slot 13 and install the fixing nut 9, and then insert the rod 14 and pass it through the positioning tube 10, and pass it through the flexible sealing layer 3 at the same time, and then screw the fixing nut 9 to make the bottom of the upper template 1 clamp the flexible sealing layer 3 and the rod body of the rod 14 passing through the flexible sealing layer 3.

[0035] The present invention will be further described below in conjunction with Examples 1 to 4.

[0036] Example 1

[0037] The construction method of relocating and building roads in a market town includes the following steps:

[0038] S1. Surveying and setting out: laying out the center line and contour line of the road according to the guide wire and elevation control points and setting control stakes;

[0039] S2, roadbed construction: according to step S1, lay out the lines and control piles, clean up the debris within the roadbed, then excavate the roadbed, and then dig drainage ditches on both sides of the roadbed. After the roadbed is dried, roll it;

[0040] S3. Construction of graded crushed stone cushion layer: mix sand with particle size ≤ 4.75mm, crushed stone with particle size of 4.75mm-9.5mm, crushed stone with particle size of 9.5mm-19mm, and crushed stone with particle size of 19mm-37.5mm to obtain a mixture, spread the mixture evenly on the roadbed with a loose thickness of 24cm, then roll it once from both sides of the roadbed to the center, and then vibrate and roll it 6 times to form a graded crushed stone cushion layer; after testing, the surface of the graded crushed stone cushion layer is flat and dense, the edges are neat, and there is no looseness;

[0041] S4. Construction of concrete stabilization layer: Steel formwork is set up on both sides of the graded gravel cushion for support. Water is sprinkled on the graded gravel cushion before paving the concrete stabilization layer mixture, and then the concrete stabilization layer mixture is evenly spread on the graded gravel cushion. The concrete stabilization layer mixture is mixed according to the mass ratio and then rolled 6 times. During the rolling process, the concrete stabilization layer mixture is kept moist to form a concrete stabilization layer. When rolling, in the straight section, it is rolled from the shoulders on both sides to the center of the road; in the flat curve section, it is rolled from the inner shoulder to the outer shoulder. After rolling, it is immediately maintained. The maintenance is to cover the concrete stabilization layer with geotextile and then sprinkle water on the geotextile; at the end of each day's construction, the end of the construction is rolled into a slope. Before paving the new concrete stabilization layer mixture the next day, the end slope is excavated and excavated into a vertical downward section, which is perpendicular to the center line of the road;

[0042] S5. Construction of pavement concrete layer: lay the formwork on the concrete stabilization layer, and apply the release agent on the side where the formwork contacts the pavement concrete mixture; pour the pavement concrete mixture on the concrete stabilization layer. The pavement concrete mixture is made of cement, sand, gravel, water, and admixtures in a mass ratio of 1:2.3:3.9:0.4:0.007, and then use the leveling machine to level it in sections according to the operation unit. During the leveling, use an inserted vibrator to vibrate. The length of the operation unit is 20m. The leveling machine uses forward vibration and backward static rolling in each operation unit, rolling 2 times; then static rolling and leveling 1 time; after the concrete solidifies, remove the formwork to form a pavement concrete layer, and then cut expansion joints on the pavement concrete layer, and then carve patterns; clean the expansion joints, and then fill the expansion joints with polyurethane caulking materials;

[0043] After the construction was completed, the road was built with compacted roadbed, 20cm thick graded crushed stone cushion, 20cm thick concrete stabilization layer, 22cm thick road surface concrete layer, and the width of the relocated town road was 10m. After testing, the road appearance was flat, without wheel marks, good joints, and good compaction quality.

[0044] Example 2

[0045] The construction method of relocating and building roads in a market town includes the following steps:

[0046] S1. Surveying and setting out: laying out the center line and contour line of the road according to the guide wire and elevation control points and setting control stakes;

[0047] S2, roadbed construction: according to step S1, lay out the lines and control piles, clean up the debris within the roadbed, then excavate the roadbed, and then dig drainage ditches on both sides of the roadbed. After the roadbed is dried, roll it;

[0048] S3. Construction of graded crushed stone cushion layer: Mix crushed stone with a particle size of 4.75 mm, crushed stone with a particle size of 9.5 mm, crushed stone with a particle size of 19 mm, and crushed stone with a particle size of 37.5 mm to obtain a mixture, and spread the mixture evenly on the roadbed with a loose thickness of 24 cm, and then roll it from both sides of the roadbed to the center twice, and then vibrate and roll it 8 times to form a graded crushed stone cushion layer; after testing, the surface of the graded crushed stone cushion layer is flat and dense, the edges are neat, and there is no looseness;

[0049] S4. Construction of concrete stabilization layer: Steel formwork is set up on both sides of the graded gravel cushion for support. Water is sprinkled on the graded gravel cushion before paving the concrete stabilization layer mixture, and then the concrete stabilization layer mixture is evenly spread on the graded gravel cushion. The concrete stabilization layer mixture is mixed according to the mass ratio and then rolled 8 times. During the rolling process, the concrete stabilization layer mixture is kept moist to form a concrete stabilization layer. When rolling, in the straight section, it is rolled from the shoulders on both sides to the center of the road; in the flat curve section, it is rolled from the inner shoulder to the outer shoulder. After rolling, it is immediately maintained. The maintenance is to cover the concrete stabilization layer with geotextile and then sprinkle water on the geotextile; at the end of each day's construction, the end of the construction is rolled into a slope. Before paving the new concrete stabilization layer mixture the next day, the end slope is excavated and excavated into a vertical downward section, and the section is perpendicular to the center line of the road;

[0050] S5. Construction of pavement concrete layer: lay the formwork on the concrete stabilization layer, and apply the release agent on the side where the formwork contacts the pavement concrete mixture; pour the pavement concrete mixture on the concrete stabilization layer. The pavement concrete mixture is made of cement, sand, gravel, water, and admixtures in a mass ratio of 1:2.4:4.0:0.5:0.009, and then use the leveling machine to level it in sections according to the operation unit. During the leveling, use an inserted vibrator to vibrate. The length of the operation unit is 30m. The leveling machine uses forward vibration and backward static rolling in each operation unit, rolling 3 times; then static rolling and leveling 3 times; after the concrete solidifies, remove the formwork to form a pavement concrete layer, and then cut expansion joints on the pavement concrete layer, and then carve patterns; clean the expansion joints, and then fill the expansion joints with polyurethane caulking materials;

[0051] After the construction was completed, the road in the relocation town was built with compacted roadbed, 15cm thick graded crushed stone cushion, 20cm thick concrete stabilization layer, and 20cm thick road surface concrete layer. The road width is 6m. After testing, the road appearance is flat, without wheel marks, good joints, and good compaction quality.

[0052] Example 3

[0053] The construction method of relocating and building roads in a market town includes the following steps:

[0054] S1. Surveying and setting out: laying out the center line and contour line of the road according to the guide wire and elevation control points and setting control stakes;

[0055] S2, roadbed construction: according to step S1, lay out the lines and control piles, clean up the debris within the roadbed, then excavate the roadbed, and then dig drainage ditches on both sides of the roadbed. After the roadbed is dried, roll it;

[0056] S3. Construction of graded crushed stone cushion layer: Mix crushed stone with a particle size of 2.38 mm, crushed stone with a particle size of 7.13 mm, crushed stone with a particle size of 14.25 mm, and crushed stone with a particle size of 28.25 mm to obtain a mixture, and spread the mixture evenly on the roadbed with a loose thickness of 24 cm, and then roll it from both sides of the roadbed to the center twice, and then vibrate and roll it seven times to form a graded crushed stone cushion layer; after testing, the surface of the graded crushed stone cushion layer is flat and dense, the edges are neat, and there is no looseness;

[0057] S4. Construction of concrete stabilization layer: Steel formwork is set up on both sides of the graded gravel cushion for support. Before spreading the concrete stabilization layer mixture, water is sprinkled on the graded gravel cushion, and then the concrete stabilization layer mixture is evenly spread on the graded gravel cushion. The concrete stabilization layer mixture is mixed according to the mass ratio and then rolled 7 times. During the rolling process, the concrete stabilization layer mixture is kept moist to form a concrete stabilization layer. When rolling, in the straight section, it is rolled from the shoulders on both sides to the center of the road; in the flat curve section, it is rolled from the inner shoulder to the outer shoulder. After rolling, it is immediately maintained. The maintenance is to cover the concrete stabilization layer with geotextile and then sprinkle water on the geotextile; at the end of each day's construction, the end of the construction is rolled into a slope. Before starting to spread the new concrete stabilization layer mixture the next day, the end slope is excavated and excavated into a vertical downward section, which is perpendicular to the center line of the road;

[0058] S5. Construction of pavement concrete layer: lay the formwork on the concrete stabilization layer, and apply the release agent on the side where the formwork contacts the pavement concrete mixture; pour the pavement concrete mixture on the concrete stabilization layer. The pavement concrete mixture is made of cement, sand, gravel, water, and admixtures in a mass ratio of 1:2.35:3.95:0.45:0.008, and then use the leveling machine to level it in sections according to the operation unit. During the leveling, use an inserted vibrator to vibrate. The length of the operation unit is 25m. The leveling machine uses forward vibration and backward static rolling in each operation unit, rolling 3 times; then static rolling and leveling 2 times; after the concrete solidifies, remove the formwork to form a pavement concrete layer, and then cut expansion joints on the pavement concrete layer, and then carve patterns; clean the expansion joints, and then fill the expansion joints with polyurethane caulking materials;

[0059] After the construction was completed, the road in the relocation town was built with compacted roadbed, 15cm thick graded crushed stone cushion, 18cm thick concrete stabilization layer, and 15cm thick road surface concrete layer. The road width is 3.5m. After testing, the road appearance is flat, without wheel marks, good joints, and good compaction quality.

[0060] Example 4

[0061] The construction method of relocating and building roads in a market town includes the following steps:

[0062] S1. Surveying and setting out: laying out the center line and contour line of the road according to the guide wire and elevation control points and setting control stakes;

[0063] S2, roadbed construction: according to step S1, lay out the lines and control piles, clean up the debris within the roadbed, then excavate the roadbed, and then dig drainage ditches on both sides of the roadbed. After the roadbed is dried, roll it;

[0064] S3. Construction of graded crushed stone cushion layer: Mix crushed stone with a particle size of 2.35mm, crushed stone with a particle size of 7.15mm, crushed stone with a particle size of 14.25mm, and crushed stone with a particle size of 28.25mm to obtain a mixture, and spread the mixture evenly on the roadbed with a loose thickness of 24cm. Then roll it from both sides of the roadbed to the center twice, and then vibrate and roll it seven times to form a graded crushed stone cushion layer. After testing, the surface of the graded crushed stone cushion layer is flat and dense, the edges are neat, and there is no looseness.

[0065] S4. Construction of concrete stabilization layer: Steel formwork is set up on both sides of the graded gravel cushion for support. Before spreading the concrete stabilization layer mixture, water is sprinkled on the graded gravel cushion, and then the concrete stabilization layer mixture is evenly spread on the graded gravel cushion. The concrete stabilization layer mixture is mixed according to the mass ratio and then rolled 7 times. During the rolling process, the concrete stabilization layer mixture is kept moist to form a concrete stabilization layer. When rolling, in the straight section, it is rolled from the shoulders on both sides to the center of the road; in the flat curve section, it is rolled from the inner shoulder to the outer shoulder. After rolling, it is immediately maintained. The maintenance is to cover the concrete stabilization layer with geotextile and then sprinkle water on the geotextile; at the end of each day's construction, the end of the construction is rolled into a slope. Before starting to spread the new concrete stabilization layer mixture the next day, the end slope is excavated and excavated into a vertical downward section, which is perpendicular to the center line of the road;

[0066] S5. Construction of pavement concrete layer: lay the formwork on the concrete stabilization layer, and apply the release agent on the side of the formwork in contact with the pavement concrete mixture; pour the pavement concrete mixture on the concrete stabilization layer. The pavement concrete mixture is made of cement, sand, gravel, water, and admixtures in a mass ratio of 1:2.37:3.94:0.47:0.008, and then use the leveling machine to level it in sections according to the operation unit. While leveling, use an inserted vibrator to vibrate. The length of the operation unit is 25m. The leveling machine is in each operation unit. The operation is carried out by forward vibration and backward static rolling, rolling twice; then static rolling and leveling twice; after the concrete solidifies, the formwork is removed to form a pavement concrete layer, and then expansion joints are cut on the pavement concrete layer, and then grooves are carved; the expansion joints are cleaned, and then the expansion joints are filled with polyurethane caulking materials; wherein, when laying the formwork, a rod positioning device is also included, the formwork includes an upper formwork 1 and a lower formwork 2, a flexible sealing layer 3 is provided between the upper formwork 1 and the lower formwork 2, an upper tongue plate 4 is fixed on the top of the upper formwork 1, and a tongue plate 5 is fixed on the top of the lower formwork 2 The upper tongue plate 4 corresponds to the lower tongue plate 5, and the rod positioning device includes a slide 6, a fixed platform 7, a positioning rod 8, a fixing nut 9, and a positioning tube 10. One side of the slide 6 is in contact with the end of the lower tongue plate 5, and a T-shaped protrusion 11 is provided on the side of the slide 6. A T-shaped slide groove 12 is provided at the end of the lower tongue plate 5. The T-shaped protrusion 11 and the T-shaped slide groove 12 are slidably matched. The two sides of the slide 6 are respectively fixed with fixed platforms 7. The upper tongue plate 4 opposite to the fixed platform 7 is provided with a slot 13 that penetrates up and down. The fixed platform 7 is provided on the upper tongue plate 4. The lower end of the positioning rod 8 passes through the fixed platform 7, and the lower end is provided with a limit plate, and the upper end passes through the slot 13. The upper end of the positioning rod 8 is provided with a threaded structure, and the fixing nut 9 is arranged on the threaded structure of the positioning rod 8, and the fixing nut 9 is in close contact with the top of the upper tongue plate 4. The positioning tube 10 is fixed on the top of the slide 6, and the rod 14 passes through the positioning tube 10 and the flexible sealing layer 3; the rod 14 is a force transmission rod or a pull rod, the force transmission rod is arranged across the transverse joint, and the force transmission rod is parallel to the driving direction of the road surface, and the pull rod is arranged across the longitudinal joint, and the pull rod is perpendicular to the driving direction of the road surface;

[0067] After the construction was completed, the road was built with compacted roadbed, 20cm thick graded crushed stone cushion, 20cm thick concrete stabilization layer, 22cm thick road surface concrete layer, and the width of the relocated town road was 10m. After testing, the road appearance was flat, without wheel marks, good joints, and good compaction quality.

Claims

1. A method for relocating roads in a town, characterized in that The following steps are involved: S1. Surveying and setting out: laying out the center line and contour line of the road according to the guide wire and elevation control points and setting control stakes; S2, roadbed construction: according to step S1, lay out the lines and control piles, clean up the debris within the roadbed, then excavate the roadbed, and then dig drainage ditches on both sides of the roadbed. After the roadbed is dried, roll it; S3. Construction of graded crushed stone cushion layer: mix sand with particle size ≤4.75mm, crushed stone with particle size 4.75mm<≤9.5mm, crushed stone with particle size 9.5mm<≤19mm, and crushed stone with particle size 19mm<≤37.5mm to obtain a mixture, spread the mixture evenly on the roadbed with a loose thickness of 24cm, then roll it from both sides of the roadbed to the center 1-2 times, and then vibrate and roll it 6-8 times to form a graded crushed stone cushion layer; S4. Construction of concrete stabilization layer: Set steel formwork on both sides of the graded gravel cushion for support. Sprinkle water on the graded gravel cushion before spreading the concrete stabilization layer mixture. Then spread the concrete stabilization layer mixture evenly on the graded gravel cushion, and then roll it 6 to 8 times. Keep the concrete stabilization layer mixture moist during the rolling process to form a concrete stabilization layer. After rolling, perform maintenance immediately. S5. Construction of pavement concrete layer: lay the formwork on the concrete stabilization layer, and apply the release agent on the side where the formwork contacts the pavement concrete mixture; pour the pavement concrete mixture on the concrete stabilization layer, and then use the leveling machine to level it in sections according to the operation unit, and use the inserted vibrator to vibrate it during the leveling. The length of the operation unit is 20 to 30 meters. In each operation unit, the leveling machine adopts the forward vibration and backward static rolling mode, rolling 2 to 3 times; then static rolling is used for leveling 1 to 3 times; after the concrete solidifies, the formwork is removed to form the pavement concrete layer, and then the expansion joints are cut on the pavement concrete layer, and then the grooves are carved; the expansion joints are cleaned, and then the expansion joints are filled with polyurethane caulking materials; Step S5, when laying the template, also includes a rod positioning device, the template includes an upper template (1) and a lower template (2), a flexible sealing layer (3) is provided between the upper template (1) and the lower template (2), an upper tongue plate (4) is fixedly provided on the top of the upper template (1), and a lower tongue plate (5) corresponding to the upper tongue plate (4) is fixedly provided on the top of the lower template (2), the rod positioning device includes a slide (6), a fixed platform (7), a positioning rod (8), a fixing nut (9), and a positioning tube (10), one side of the slide (6) is in contact with the end of the lower tongue plate (5), and the side of the slide (6) is provided with a T-shaped protrusion (11), the end of the lower tongue plate (5) is provided with a T-shaped groove (12), the T-shaped protrusion (11) and the T-shaped groove (12) are slidably matched, and the slide ( 6), a fixed platform (7) is fixed on both sides, and a slot (13) is opened on the upper tongue plate (4) opposite to the fixed platform (7), the lower end of the positioning rod (8) passes through the fixed platform (7), and the lower end is provided with a limit plate, and the upper end passes through the slot (13), the upper end of the positioning rod (8) is provided with a threaded structure, the fixing nut (9) is arranged on the threaded structure of the positioning rod (8), and the fixing nut (9) is in close contact with the top of the upper tongue plate (4), the positioning tube (10) is fixed on the top of the slide (6), and the rod (14) passes through the positioning tube (10) and the flexible sealing layer (3); the rod (14) is a force transmission rod or a pull rod, the force transmission rod is arranged across the transverse joint, and the force transmission rod is parallel to the driving direction of the road surface, and the pull rod is arranged across the longitudinal joint, and the pull rod is perpendicular to the driving direction of the road surface; The flexible sealing layer (3) comprises a sealing block (3a) and a sealing strip (3b); the sealing block (3a) is provided with a rod hole (3c), the rod (14) passes through the rod hole (3c), and the sealing strip (3b) is provided on both sides of the sealing block (3a); The front side of the slide (6) is provided with a through hole penetrating the slide (6) and the T-shaped protrusion (11), the through hole is provided with an internal thread, and the through hole is provided with a fixing bolt (15).

2. The method for relocating and constructing roads in a town according to claim 1, characterized in that In step S4, the concrete stabilization layer mixture is obtained by mixing cement, sand, crushed stone and water in a mass ratio of 117:850:1387:

106.

3. The method for relocating and constructing roads in a town according to claim 1, characterized in that When rolling in step S4, in a straight section, rolling is done from the shoulders on both sides to the center of the road; in a flat curve section, rolling is done from the inner shoulder to the outer shoulder.

4. The method for relocating and constructing roads in a town according to claim 1, characterized in that At the end of each day's construction, the end of the construction is rolled into a slope. Before paving the new concrete stabilization layer mixture the next day, the end slope is excavated and excavated into a vertical downward section, which is perpendicular to the center line of the road.

5. The method for relocating and reconstructing roads in a town according to claim 1, characterized in that In step S5, the pavement concrete mixture is obtained by mixing cement, sand, gravel, water and admixture in a mass ratio of 1:2.3-2.4:3.9-4.0:0.4-0.5:0.007-0.009, wherein the admixture is Shanxi Kangli KLPCA-S.

6. The method for relocating and reconstructing roads in a town according to claim 1, characterized in that The maintenance in step S4 is to cover the geotextile on the concrete stabilization layer and then sprinkle water on the geotextile.

7. The method for relocating and reconstructing roads in a town according to claim 1, characterized in that The force transmission rod is round steel, and the pull rod is threaded steel.

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