CN116971251A - Steel slag concrete road paving device and construction method - Google Patents

Abstract

The invention discloses a steel slag concrete road paving device and a construction method, wherein the device comprises a bottom frame, a support and a wire guide roller, a side plate is vertically arranged at the left end of the bottom frame, a through hole is dug on the bottom frame on the right side of the side plate, a positioning cylinder is arranged at the through hole, a first positioning rod is inserted into the positioning cylinder, the two ends of the bottom frame are respectively provided with the support, the top of the support is provided with the wire guide roller, and at least two limiting assemblies are arranged beside the bottom frame. According to the invention, the steel slag coarse aggregate is used for paving the surface layer of the asphalt pavement instead of the traditional natural aggregate, so that the pavement condition is improved, the road service level is improved, and the service life of the road is prolonged; effectively reduces the early construction cost and the later maintenance cost, and is easy to popularize.

Description

Steel slag concrete road paving device and construction method

Technical Field

The invention relates to a paving device, in particular to a steel slag concrete road paving device and a construction method, and belongs to the technical field of road construction.

Background

The existing expressways in China are paved by adopting asphalt pavement, the service life of the expressways is close to the service life of the expressways, and the road sections bear heavy traffic pressure, so that the road surfaces are subjected to the double effects of vehicle channeling traffic loads and environmental factors, more diseases such as transverse and longitudinal cracks, massive cracks, ruts, pits, subsidence and poor repair are caused, and the road sections have the problems of various road surface disease treatment methods, large material differences, excessively dispersed implemented road sections, obvious road surface color difference and the like.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the steel slag concrete road paving device and the construction method thereof overcome the defects of the prior art, and replace the traditional natural aggregate with the steel slag coarse aggregate for the surface layer of the asphalt pavement, so that the pavement condition is improved, the road service level is improved, the service life of the road is prolonged, and the early construction cost and the later maintenance cost are effectively reduced.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a slag concrete road laying device, includes chassis, support and wire roller, the left end of chassis is provided with the curb plate perpendicularly, dig on the chassis on curb plate right side and be equipped with the through-hole to be provided with the positioning tube in through-hole department, the positioning tube interpolation is equipped with first locating lever, the both ends of chassis are provided with the support respectively, the top of support is provided with the wire roller, one side of chassis is provided with two at least spacing subassemblies.

The top of support digs and is equipped with U type recess, the both ends of wire roller rotate and connect a handle, a handle is located U type recess, it has the second inserted bar to run through on the U type recess of a handle top.

The limiting assembly consists of a second positioning rod, a displacement sleeve, a limiting handle and a base, wherein a positioning sleeve is arranged at the center of the base, the second positioning rod is inserted into the positioning sleeve, the second positioning rod is sleeved with the displacement sleeve, one side of the outer wall of the displacement sleeve is provided with a jacking bolt, and the other side of the outer wall of the displacement sleeve is provided with the limiting handle.

The round panels on two sides of the wire guide roller are correspondingly provided with perforations, and first inserted bars penetrate through the perforations.

The construction method of the steel slag concrete road paving device comprises the following steps:

s1, milling construction

(1) Checking and debugging the milling machine, strictly forbidden to operate without water by the milling equipment, and providing enough water storage equipment on a construction site; a water outlet is arranged on a milling device of the milling machine, the water yield is controlled, the road surface is prevented from being polluted again due to excessive water yield, and a fog gun water truck is used for dust fall on a material port at a milling material outlet;

(2) the site is lofted before milling, so that the milling thickness and width are determined, marking is carried out, and smoothness of the milling edge is ensured;

(3) milling the milling equipment one by one along the traffic flow direction according to the determined milling position and depth, wherein the milling equipment cannot mill the milling position by adopting manual cooperation with a small machine tool for roughening treatment; the end part of the milling machine is not a vertical elevation, and a cutting machine is required to be used for cutting to enable the end part to be vertical;

(4) the milling depth of the milling machine is gradually adjusted from zero to the designed milling depth, and acceleration is strictly forbidden so as not to cause uneven transition sections; after the transition is finished, entering the next milling area of continuous milling, and gradually transitioning from the original milling depth to the new milling depth if the milling depth needs to be increased or decreased; when milling ends, the milling depth should be slowly adjusted from the designed milling depth to zero;

s2, cleaning and sprinkling cloth

(1) After milling, firstly adopting a horizontal type cleaning machine to clean the milling surface until loose particles of the milling surface are completely removed, and then adopting a road surface dry-cleaning vehicle to clean the milling surface;

(2) during milling, collecting milling materials scattered by a milling machine, and treating flying dust by adopting dust suppression equipment;

s3, sticking layer oil sprinkling cloth

(1) When the oil is sprayed, the speed of the spraying vehicle is stabilized, so that the oil is uniformly sprayed, and when the oil is omitted, manual spraying is adopted;

(2) after the oil-bonding layer is sprayed, the emulsion is fully broken, and the water in the emulsified asphalt is ensured to be evaporated, and the subsequent construction can be carried out;

s4, paving of steel slag mixture asphalt

(1) Before construction, mounting steel slag concrete road paving devices on two sides of the milling surface, and placing limit assemblies according to the milling length, wherein the distance between adjacent limit assemblies is 1mm;

(2) punching holes on the ground below the through hole on the left side of the underframe, sequentially penetrating the first positioning rod into the positioning cylinder and the holes on the ground, placing the support handles at the two ends of the wire guide roller into the U-shaped groove, and inserting a second insertion handle above the U-shaped groove (6);

(3) according to the height of the spreading surface, the position of the displacement sleeve is adjusted, so that the function of positioning the pull wire is achieved; the right end of the stay wire is required to be wound on a second positioning rod of the rightmost limiting component and is fixed;

(4) after the equipment is installed in place, paving construction can be carried out by using a paver, and after paving, the actual paving thickness and the paving top surface elevation are inspected at multiple points within 5-10 mm; the temperature of the mixture when the mixture is transported to the site is not lower than 165-175 ℃, the paver needs to be preheated for 0.5-1h in advance, the temperature of the screed is not lower than 100 ℃, and the paving temperature of the mixture is 155-170 ℃; in the paving process, a vibrating or ramming device of a screed plate is selected to improve the initial compaction degree of the pavement;

(5) setting the height of a screed of the paver by the paver according to a pre-determined loosening coefficient, starting paving when the mixture stored by the screw conveyor reaches 2/3 of a conveying shaft by the paver, and paving according to a determined paving speed; the paver must slowly, uniformly and continuously pave without changing the speed or stopping midway at will and reduce the material receiving times of the material receiving hopper of the paver so as to improve the flatness and reduce the segregation of the mixture. When the obvious segregation, wave, crack and drag mark of the mixture are found, the reasons should be analyzed in time to eliminate the reasons;

s5, proportioning and rolling of steel slag asphalt

(1) The steel slag asphalt mixture is formed by stirring modified asphalt, coarse and fine aggregates and mineral powder;

(2) compacting the steel slag asphalt mixture in three stages of initial compaction, re-compaction and final compaction, and fully and uniformly rolling according to a compacting machine, a compacting program and a compacting method determined by the test section when the temperature is reduced to the initial compaction temperature, wherein compacting is carried out on non-compacted corners by a small machine;

(3) and rolling the road roller from the lower part of the outer side to the upper part of the center of the road, and finally rolling the road or the full width of the road to be one time, when the edge is free from supporting, the mixture at the edge can be slightly raked up by a rake, then the outer side wheel of the road roller stretches out of the edge for rolling more than 10cm, or the edge can be firstly vacated for 30-40 cm wide and is not rolled, and after the first time of rolling, most of the weight of the road roller is positioned on the compacted mixture surface, and then the edge is rolled so as to reduce outward pushing.

(4) The road roller is not suitable for carrying out return rolling at the same section, each return stroke is staggered forward by a distance of not less than 1m, the return strokes of initial pressure, re-pressure and final pressure are not at the same section, the distance between the front and back is within the range of 5-10m, the lap joint of the current rolling and the previous rolling section is not less than 10m, and the direction changing and advancing and retreating of the road roller are carried out on the compacted surface;

(5) rolling at a curve or an intersection, firstly using a steering road roller to work, and firstly starting rolling from the inner side of the curve or the lower side of the curve; the sharp bend is rolled in a straight line as far as possible, the pressing channels are converted one by one, and the unfilled corner is compacted by a small machine tool, wherein the steering speed is matched during compaction, and the vibration is used as far as possible, so that the shearing force is reduced;

(6) when rolling a steep slope, the light road roller is adopted for prepressing in real time, then the vibratory roller is adopted, the static pressure is adopted, and after the mixture is stable, the vibration rolling with low amplitude can be adopted;

s6, joint treatment

(1) Measuring, positioning and marking the construction reserved slope surface to ensure the line type to be straight, milling and planing the corresponding marking position by using a small milling machine, wherein the milling and planing width is 15-20 cm, and the end is chiseled by a pneumatic pick after milling and planing until the end of the next layer is chiseled, wherein the chiseling is carried out along the milling and planing direction, and the chiseled end is flat and has no pit; after cleaning, adhering the qualified solid asphalt strips on the sections, and fixing the solid asphalt strips on the vertical surfaces by nylon nails to ensure the adhering effect;

(2) the smooth joint should be tightly bonded, fully compacted and smoothly connected, when the construction is finished, the paver slightly lifts the screed plate to leave the site at the position which is approximately 1m in front of the end part, and the end part mixture is manually shoveled and then rolled; firstly placing a 6m ruler on the top surface of the compacted layer at 2-3 positions along the central line, finding out the contact position between the surface of the compacted layer and the bottom surface of the 6m ruler on the surface longitudinal slope or the section where the thickness of the compacted layer begins to change, and vertically removing the insufficient thickness of the end part layer when the compacted layer is not completely cooled, so that the compacted layer is connected at right angles in the next construction;

(3) before continuously paving the mixture from the joint, checking the flatness of the end part by using a 3-meter ruler, if the flatness is not in accordance with the requirement, removing the mixture, before paving the transverse joint, coating asphalt on the joint interface, preheating the asphalt by using a screed, placing a starting backing plate under the screed of a paver, wherein the thickness of the backing plate is equal to the difference between the paving thickness of the mixture and the thickness of the compacted pavement, and the length of the backing plate is longer than the front edge distance and the rear edge distance of the screed so as to adjust the reserved height; after the mixture is paved at the transverse joint, the joint is cleaned, whether the loose pavement thickness of the newly paved mixture is proper or not is checked, when the joint is cleaned, the newly paved mixture is not pushed and scraped excessively, after the construction of the paving layer at the joint is finished, the flatness is checked by a 3 m ruler, and when the mixture is not cooled, the mixture is treated immediately;

(4) the rolling of the transverse joint is firstly carried out by using a double-steel-wheel road roller, a skid for stopping the road roller is arranged on the outer side of a rolling belt, the road roller is positioned on a compacted mixed material layer during rolling, the width of the compacted mixed material layer extending into a new layer is 15cm, and then the compacted mixed material is moved to the new layer for 15-20 cm every time until the compacted mixed material layer is completely on the new layer, and then longitudinal rolling is carried out. When the adjacent spreading layers are formed and have longitudinal seams, firstly, rolling the adjacent spreading layers with a double-steel-wheel road roller along the longitudinal seams for one time, wherein the rolling width is 15-20 cm, then, transversely rolling along the transverse seams, and finally, carrying out normal longitudinal rolling;

s7, construction of pavement marking

(1) The lane boundary adopts a white hot melt type dotted line, the line width is 0.15m, the solid line length is 6m, and the interval is 9m;

(2) before formally spraying marked lines, performing an on-site trial drawing test, determining the interval time of spraying the hot melt paint, and cleaning the road surface; and before formally spraying marked lines, firstly spraying a hot melt base oil detergent.

The invention has the positive beneficial effects that:

1. the steel slag asphalt concrete is formed by stirring modified asphalt, coarse and fine aggregates and mineral powder, has enough high-temperature stability and low-temperature crack resistance, and can improve the pavement condition, improve the road service level, prolong the service life of a road, and effectively reduce the early construction cost and the later maintenance cost by paving the road with the steel slag asphalt concrete; meanwhile, the utilization rate of resources is also improved.

2. According to the invention, the limiting assemblies are arranged at two sides of the milling pit, so that workers can conveniently control the thickness of the pavement, and the flatness of the road surface after later rolling is ensured, so that the milling pit is convenient to use and simple to operate.

3. The milling process comprises a milling transition section, a milling depth adjusting section and a milling transition section, wherein a construction mode of gradual adjustment is adopted, so that the situation that the milling is uneven is avoided, and the working quality is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the chassis of the present invention;

FIG. 3 is a schematic view of the structure of the displacement sleeve of the present invention;

wherein: the device comprises a 1-underframe, a 2-side plate, a 3-positioning cylinder, a 4-first positioning rod, a 5-bracket, a 6-U-shaped groove, a 7-wire roller, an 8-support handle, a 9-perforation, a 10-first inserting rod, a 11-second inserting rod, a 12-second positioning rod, a 13-displacement sleeve, a 14-limiting handle, a 15-jacking bolt-16-base and a 17-positioning sleeve.

The specific embodiment is as follows:

the invention is further explained and illustrated below with reference to the drawings:

embodiment 1, see fig. 1-3, a steel slag concrete road laying device, including chassis 1, support 5 and wire roller 7, the left end of chassis 1 is provided with curb plate 2 perpendicularly, digs on chassis 1 on curb plate 2 right side and is equipped with the through-hole to be provided with positioning tube 3 in through-hole department, positioning tube 3 interpolation is equipped with first locating lever 4, and the both ends of chassis 1 are provided with support 5 respectively, and the top of support 5 is provided with wire roller 7, and one side of chassis 1 is provided with two at least spacing subassemblies.

The top of the bracket 5 is dug with a U-shaped groove 6, two ends of the wire guide roller 7 are rotationally connected with a support handle 8, the support handle 8 is positioned in the U-shaped groove 6, and a second inserted link 11 penetrates through the U-shaped groove 6 above the support handle 8.

The limiting component consists of a second positioning rod 12, a displacement sleeve 13, a limiting handle 14 and a base 16, wherein a positioning sleeve 17 is arranged at the center of the base 16, the second positioning rod 12 is inserted into the positioning sleeve 17, the displacement sleeve 13 is sleeved on the second positioning rod 12, a jacking bolt 15 is arranged on one side of the outer wall of the displacement sleeve, and the limiting handle 14 is arranged on the other side of the outer wall of the displacement sleeve.

The round panels at the two sides of the wire guide roller 7 are correspondingly provided with through holes 9, and first inserted bars 10 penetrate through the through holes 9.

In the above description, after the wire is paid out, the first inserting rod is inserted into the through hole on the right side of the wire guiding roller, so that the rotation of the wire guiding roller can be stopped.

In the above description, when the chassis is placed on the ground, the position of the through hole on the left side of the chassis corresponding to the ground needs to be dug to set the locating hole, when the limiting component is used, the base can be removed, the hole is dug on the ground, and then the lower end of the second locating rod is inserted into the dug hole.

In the above description, since the wire guide roller is located on the bracket and the bracket is at a certain height, the limiting handle has the function of pulling down the wire, being higher than the ground or being located on the upper end surface of the milling pit, and being determined according to the laying thickness.

In the above description, when the guide roller is located on the bracket, the wire is located at a position above the desired laying thickness, that is, the bracket height is much greater than the desired height of the road surface to be laid.

Embodiment 2, the construction method of the steel slag concrete road paving device includes the following steps:

s1, milling construction

(1) Checking and debugging the milling machine, strictly forbidden to operate without water by the milling equipment, and providing enough water storage equipment on a construction site; a water outlet is arranged on a milling device of the milling machine, the water yield is controlled, the road surface is prevented from being polluted again due to excessive water yield, and a fog gun water truck is used for dust fall on a material port at a milling material outlet;

(2) the site is lofted before milling, so that the milling thickness and width are determined, marking is carried out, and smoothness of the milling edge is ensured;

(3) milling the milling equipment one by one along the traffic flow direction according to the determined milling position and depth, wherein the milling equipment cannot mill the milling position by adopting manual cooperation with a small machine tool for roughening treatment; the end part of the milling machine is not a vertical elevation, and a cutting machine is required to be used for cutting to enable the end part to be vertical;

(4) the milling depth of the milling machine is gradually adjusted from zero to the designed milling depth, and acceleration is strictly forbidden so as not to cause uneven transition sections; after the transition is finished, entering the next milling area of continuous milling, and gradually transitioning from the original milling depth to the new milling depth if the milling depth needs to be increased or decreased; when milling ends, the milling depth should be slowly adjusted from the designed milling depth to zero;

s2, cleaning and sprinkling cloth

(1) After milling, firstly adopting a horizontal type cleaning machine to clean the milling surface until loose particles of the milling surface are completely removed, and then adopting a road surface dry-cleaning vehicle to clean the milling surface;

(2) during milling, collecting milling materials scattered by a milling machine, and treating flying dust by adopting dust suppression equipment;

s3, sticking layer oil sprinkling cloth

(1) When the oil is sprayed, the speed of the spraying vehicle is stabilized, so that the oil is uniformly sprayed, and when the oil is omitted, manual spraying is adopted;

(2) after the oil-bonding layer is sprayed, the emulsion is fully broken, and the water in the emulsified asphalt is ensured to be evaporated, and the subsequent construction can be carried out;

s4, paving of steel slag mixture asphalt

(1) Before construction, mounting steel slag concrete road paving devices on two sides of the milling surface, and placing limit assemblies according to the milling length, wherein the distance between adjacent limit assemblies is 1mm;

(2) punching holes on the ground below the left through hole of the underframe, sequentially penetrating the first positioning rod into the positioning cylinder and the holes on the ground, placing the support handles 8 at the two ends of the wire guide roller 7 into the U-shaped groove 6, and inserting a second insertion handle above the U-shaped groove 6;

(3) the position of the displacement sleeve 13 is adjusted according to the height of the spreading surface, so that the pull wire 18 is positioned; the right end of the pull wire 18 is required to be wound on the second positioning rod 12 of the rightmost limiting component and is fixed;

(4) after the equipment is installed in place, paving construction can be carried out by using a paver, and after paving, the actual paving thickness and the paving top surface elevation are inspected at multiple points within 5-10 mm; the temperature of the mixture when the mixture is transported to the site is not lower than 165-175 ℃, the paver needs to be preheated for 0.5-1h in advance, the temperature of the screed is not lower than 100 ℃, and the paving temperature of the mixture is 155-170 ℃; in the paving process, a vibrating or ramming device of a screed plate is selected to improve the initial compaction degree of the pavement;

(5) setting the height of a screed of the paver by the paver according to a pre-determined loosening coefficient, starting paving when the mixture stored by the screw conveyor reaches 2/3 of a conveying shaft by the paver, and paving according to a determined paving speed; the paver must slowly, uniformly and continuously pave without changing the speed or stopping midway at will and reduce the material receiving times of the material receiving hopper of the paver so as to improve the flatness and reduce the segregation of the mixture. When the obvious segregation, wave, crack and drag mark of the mixture are found, the reasons should be analyzed in time to eliminate the reasons;

s5, proportioning and rolling of steel slag asphalt

(1) Compacting the steel slag asphalt mixture in three stages of initial compaction, re-compaction and final compaction, and fully and uniformly rolling according to a compacting machine, a compacting program and a compacting method determined by the test section when the temperature is reduced to the initial compaction temperature, wherein compacting is carried out on non-compacted corners by a small machine;

(2) and rolling the road roller from the lower part of the outer side to the upper part of the center of the road, and finally rolling the road or the full width of the road to be one time, when the edge is free from supporting, the mixture at the edge can be slightly raked up by a rake, then the outer side wheel of the road roller stretches out of the edge for rolling more than 10cm, or the edge can be firstly vacated for 30-40 cm wide and is not rolled, and after the first time of rolling, most of the weight of the road roller is positioned on the compacted mixture surface, and then the edge is rolled so as to reduce outward pushing.

(3) The road roller is not suitable for carrying out return rolling at the same section, each return stroke is staggered forward by a distance of not less than 1m, the return strokes of initial pressure, re-pressure and final pressure are not at the same section, the distance between the front and back is within the range of 5-10m, the lap joint of the current rolling and the previous rolling section is not less than 10m, and the direction changing and advancing and retreating of the road roller are carried out on the compacted surface;

(4) rolling at a curve or an intersection, firstly using a steering road roller to work, and firstly starting rolling from the inner side of the curve or the lower side of the curve; the sharp bend is rolled in a straight line as far as possible, the pressing channels are converted one by one, and the unfilled corner is compacted by a small machine tool, wherein the steering speed is matched during compaction, and the vibration is used as far as possible, so that the shearing force is reduced;

(5) when rolling a steep slope, the light road roller is adopted for prepressing in real time, then the vibratory roller is adopted, the static pressure is adopted, and after the mixture is stable, the vibration rolling with low amplitude can be adopted;

s6, joint treatment

(1) Measuring, positioning and marking the construction reserved slope surface to ensure the line type to be straight, milling and planing the corresponding marking position by using a small milling machine, wherein the milling and planing width is 15-20 cm, and the end is chiseled by a pneumatic pick after milling and planing until the end of the next layer is chiseled, wherein the chiseling is carried out along the milling and planing direction, and the chiseled end is flat and has no pit; after cleaning, adhering the qualified solid asphalt strips on the sections, and fixing the solid asphalt strips on the vertical surfaces by nylon nails to ensure the adhering effect;

(2) the smooth joint should be tightly bonded, fully compacted and smoothly connected, when the construction is finished, the paver slightly lifts the screed plate to leave the site at the position which is approximately 1m in front of the end part, and the end part mixture is manually shoveled and then rolled; firstly placing a 6m ruler at 2-3 positions along the central line on the top surface of the compacted layer, finding out the contact position between the surface of the compacted layer with the longitudinal slope of the surface or the cross section with the thickness of the compacted layer changing and the bottom surface of the 6m ruler), and vertically removing the insufficient thickness part of the end part layer when the compacted layer is not cooled completely, so that the compacted layer is connected at right angles in the next construction;

(3) before continuously paving the mixture from the joint, checking the flatness of the end part by using a 3-meter ruler, if the flatness is not in accordance with the requirement, removing the mixture, before paving the transverse joint, coating asphalt on the joint interface, preheating the asphalt by using a screed, placing a starting backing plate under the screed of a paver, wherein the thickness of the backing plate is equal to the difference between the paving thickness of the mixture and the thickness of the compacted pavement, and the length of the backing plate is longer than the front edge distance and the rear edge distance of the screed so as to adjust the reserved height; after the mixture is paved at the transverse joint, the joint is cleaned, whether the loose pavement thickness of the newly paved mixture is proper or not is checked, when the joint is cleaned, the newly paved mixture is not pushed and scraped excessively, after the construction of the paving layer at the joint is finished, the flatness is checked by a 3 m ruler, and when the mixture is not cooled, the mixture is treated immediately;

(4) the rolling of the transverse joint is firstly carried out by using a double-steel-wheel road roller, a skid for stopping the road roller is arranged on the outer side of a rolling belt, the road roller is positioned on a compacted mixed material layer during rolling, the width of the compacted mixed material layer extending into a new layer is 15cm, and then the compacted mixed material is moved to the new layer for 15-20 cm every time until the compacted mixed material layer is completely on the new layer, and then longitudinal rolling is carried out. When the adjacent spreading layers are formed and have longitudinal seams, firstly, rolling the adjacent spreading layers with a double-steel-wheel road roller along the longitudinal seams for one time, wherein the rolling width is 15-20 cm, then, transversely rolling along the transverse seams, and finally, carrying out normal longitudinal rolling;

s7, construction of pavement marking

(1) The lane boundary adopts a white hot melt type dotted line, the line width is 0.15m, the solid line length is 6m, and the interval is 9m;

(2) before formally spraying marked lines, performing an on-site trial drawing test, determining the interval time of spraying the hot melt paint, and cleaning the road surface; and before formally spraying marked lines, firstly spraying a hot melt base oil detergent.

Wherein: the steel slag asphalt mixture is formed by stirring modified asphalt, coarse and fine aggregates and mineral powder.

In the above description, there are four rolling modes when the steel slag asphalt mixture is constructed, and the rolling modes are specifically as follows:

combination 1: coefficient of loosening of 1.25

Initial pressure: 1. the double steel wheels of the table move forward and static pressure and return vibration are carried out for 1 time;

and (3) re-pressing: 1.2 times of double-drive double-vibration of the double-steel-wheel road roller and 3 times of rolling of 1 XP303 type rubber-tyred road roller;

final pressure: 1. static pressure is carried out on the surface for 2 times by a double steel wheel road roller.

Combination 2: coefficient of loosening of 1.25

Initial pressure: 1 double steel wheels carry out forward static pressure and return vibration for 2 times;

and (3) re-pressing: 1 XP303 type rubber-tire roller is rolled for 2 times, and 1 double-steel-wheel roller is subjected to double-drive double-vibration for 2 times;

final pressure: 1. static pressure is carried out on the surface for 2 times by a double steel wheel road roller.

Combination 3: coefficient of loosening of 1.3

Initial pressure: 1. the double steel wheels of the table move forward and static pressure and return vibration are carried out for 1 time;

the double-drive double-vibration of 1 double-steel-wheel road roller is carried out for 2 times, and 1 XP303 type rubber-wheel road roller is carried out for 3 times;

final pressure: static pressure is carried out on the surface for 2 times by a double-steel-wheel road roller.

Combination 4: coefficient of loosening of 1.3

Initial pressure: 1. the double steel wheels of the table move forward and static pressure and return vibration are carried out for 2 times;

and (3) re-pressing: 1. rolling for 2 times by using the XP303 type rubber-tyred roller, and carrying out double-drive double-vibration for 2 times by using 1 double-steel-tyred roller;

final pressure: static pressure is carried out on the surface for 2 times by a double-steel-wheel road roller.

The length of the rolling section of the rolling roller is selected according to the principle of balancing the paving speed, the rolling roller cannot be stopped at will in the continuous paving process of the paver, and the rolling roller is kept clean in the rolling process; the compaction of the vibrating rammer or the compaction of the small hand-push type vibrating roller is adopted for the local position where the roller cannot be compacted; the road roller must not turn around, add water or stay on the road section which is not rolled and formed, and must not park various mechanical equipment or vehicles and must not scatter sundries such as mineral materials, oil materials and the like on the road surface formed on the same day.

According to the invention, 5-10mm and 10-15mm steel slag coarse aggregates are used for replacing traditional natural aggregates for paving the surface layer of the asphalt pavement, so that the pavement condition is improved, the road service level is improved, and the service life of a road is prolonged; the early construction cost and the later maintenance cost are effectively reduced, the economic and social development needs along the line area are met, the contribution of the road transportation network in the economic development is improved, and meanwhile, guidance and reference are provided for popularization and application of the steel slag asphalt pavement in China.

Claims (6)

1. The utility model provides a slag concrete road laying device, includes chassis (1), support (5) and wire roller (7), its characterized in that: the novel wire guide device is characterized in that a side plate (2) is vertically arranged at the left end of the bottom frame (1), a through hole is formed in the bottom frame (1) on the right side of the side plate (2), a positioning cylinder (3) is arranged at the through hole, a first positioning rod (4) is arranged in the positioning cylinder (3) in an inserted mode, supports (5) are respectively arranged at the two ends of the bottom frame (1), a wire guide roller (7) is arranged at the top of each support (5), and at least two limiting assemblies are arranged beside the bottom frame (1).

2. The steel slag concrete road paving apparatus according to claim 1, wherein: the wire guide device is characterized in that a U-shaped groove (6) is dug at the top of the support (5), two ends of the wire guide roller (7) are rotationally connected with a support handle (8), the support handle (8) is located in the U-shaped groove (6), and a second inserting rod (11) penetrates through the U-shaped groove (6) above the support handle (8).

3. The steel slag concrete road paving apparatus according to claim 1, wherein: the limiting assembly consists of a second positioning rod (12), a displacement sleeve (13), a limiting handle (14) and a base (16), wherein a positioning sleeve (17) is arranged at the center of the base (16), the second positioning rod (12) is inserted into the positioning sleeve (17), the displacement sleeve (13) is sleeved on the second positioning rod (12), a jacking bolt (15) is arranged on one side of the outer wall of the displacement sleeve, and a limiting handle (14) is arranged on the other side of the outer wall of the displacement sleeve.

4. The steel slag concrete road paving apparatus according to claim 2, wherein: the round panels on two sides of the wire guide roller (7) are correspondingly provided with perforations (9), and a first inserted link (10) penetrates through the perforations (9).

5. The construction method of a steel slag concrete road paving apparatus according to any one of claims 1 to 4, comprising the steps of:

s1, milling construction

(1) Checking and debugging the milling machine, strictly forbidden to operate without water by the milling equipment, and providing enough water storage equipment on a construction site; a water outlet is arranged on a milling device of the milling machine, the water yield is controlled, the road surface is prevented from being polluted again due to excessive water yield, and a fog gun water truck is used for dust fall on a material port at a milling material outlet;

(2) the site is lofted before milling, so that the milling thickness and width are determined, marking is carried out, and smoothness of the milling edge is ensured;

(3) milling the milling equipment one by one along the traffic flow direction according to the determined milling position and depth, wherein the milling equipment cannot mill the milling position by adopting manual cooperation with a small machine tool for roughening treatment; the end part of the milling machine is not a vertical elevation, and a cutting machine is required to be used for cutting to enable the end part to be vertical;

(4) the milling depth of the milling machine is gradually adjusted from zero to the designed milling depth, and acceleration is strictly forbidden so as not to cause uneven transition sections; after the transition is finished, entering the next milling area of continuous milling, and gradually transitioning from the original milling depth to the new milling depth if the milling depth needs to be increased or decreased; when milling ends, the milling depth should be slowly adjusted from the designed milling depth to zero;

s2, cleaning and sprinkling cloth

(1) After milling, firstly adopting a horizontal type cleaning machine to clean the milling surface until loose particles of the milling surface are completely removed, and then adopting a road surface dry-cleaning vehicle to clean the milling surface;

(2) during milling, collecting milling materials scattered by a milling machine, and treating flying dust by adopting dust suppression equipment;

s3, sticking layer oil sprinkling cloth

(1) When the oil is sprayed, the speed of the spraying vehicle is stabilized, so that the oil is uniformly sprayed, and when the oil is omitted, manual spraying is adopted;

(2) after the oil-bonding layer is sprayed, the emulsion is fully broken, and the water in the emulsified asphalt is ensured to be evaporated, and the subsequent construction can be carried out;

s4, paving of steel slag mixture asphalt

(1) Before construction, mounting steel slag concrete road paving devices on two sides of the milling surface, and placing limit assemblies according to the milling length, wherein the distance between adjacent limit assemblies is 1mm;

(2) punching holes on the ground below the left through hole of the underframe, sequentially penetrating the first positioning rod into the positioning cylinder and the holes on the ground, placing the support handles (8) at the two ends of the wire guide roller (7) into the U-shaped groove (6), and inserting a second insertion handle above the U-shaped groove (6);

(3) according to the height of the spreading surface, the position of the displacement sleeve (13) is adjusted, so that the stay wire (18) is positioned; the right end of the stay wire (18) needs to be wound on a second positioning rod (12) of the rightmost limiting component and is fixed;

(4) after the equipment is installed in place, paving construction can be carried out by using a paver, and after paving, the actual paving thickness and the paving top surface elevation are inspected at multiple points within 5-10 mm; the temperature of the mixture when the mixture is transported to the site is not lower than 165-175 ℃, the paver needs to be preheated for 0.5-1h in advance, the temperature of the screed is not lower than 100 ℃, and the paving temperature of the mixture is 155-170 ℃; in the paving process, a vibrating or ramming device of a screed plate is selected to improve the initial compaction degree of the pavement;

(5) setting the height of a screed of the paver by the paver according to a pre-determined loosening coefficient, starting paving when the mixture stored by the screw conveyor reaches 2/3 of a conveying shaft by the paver, and paving according to a determined paving speed; the paver must slowly, uniformly and continuously pave without changing the speed or stopping midway at will and reduce the material receiving times of the material receiving hopper of the paver so as to improve the flatness and reduce the segregation of the mixture. When the obvious segregation, wave, crack and drag mark of the mixture are found, the reasons should be analyzed in time to eliminate the reasons;

s5, proportioning and rolling of steel slag asphalt

(1) Compacting the steel slag asphalt mixture in three stages of initial compaction, re-compaction and final compaction, and fully and uniformly rolling according to a compacting machine, a compacting program and a compacting method determined by the test section when the temperature is reduced to the initial compaction temperature, wherein compacting is carried out on non-compacted corners by a small machine;

(2) rolling the road roller from the lower part of the outer side to the upper part of the center of the road, and finally rolling the road or the full width of the road to be one time, when the edge is free from supporting, a rake can be used for slightly raking up the mixture at the edge, then the outer side wheel of the road roller stretches out of the edge for rolling more than 10cm, or the edge can be firstly vacated for 30-40 cm wide and is not rolled, and after the first time of rolling, the edge is rolled again when most of the weight of the road roller is positioned on the compacted mixture surface so as to reduce outward pushing;

(3) the road roller is not suitable for carrying out return rolling at the same section, each return stroke is staggered forward by a distance of not less than 1m, the return strokes of initial pressure, re-pressure and final pressure are not at the same section, the distance between the front and back is within the range of 5-10m, the lap joint of the current rolling and the previous rolling section is not less than 10m, and the direction changing and advancing and retreating of the road roller are carried out on the compacted surface;

(4) rolling at a curve or an intersection, firstly using a steering road roller to work, and firstly starting rolling from the inner side of the curve or the lower side of the curve; the sharp bend is rolled in a straight line as far as possible, the pressing channels are converted one by one, and the unfilled corner is compacted by a small machine tool, wherein the steering speed is matched during compaction, and the vibration is used as far as possible, so that the shearing force is reduced;

(5) when rolling a steep slope, the light road roller is adopted for prepressing in real time, then the vibratory roller is adopted, the static pressure is adopted, and after the mixture is stable, the vibration rolling with low amplitude can be adopted;

s6, joint treatment

(1) Measuring, positioning and marking the construction reserved slope surface to ensure the line type to be straight, milling and planing the corresponding marking position by using a small milling machine, wherein the milling and planing width is 15-20 cm, and the end is chiseled by a pneumatic pick after milling and planing until the end of the next layer is chiseled, wherein the chiseling is carried out along the milling and planing direction, and the chiseled end is flat and has no pit; after cleaning, adhering the qualified solid asphalt strips on the sections, and fixing the solid asphalt strips on the vertical surfaces by nylon nails to ensure the adhering effect;

(2) the smooth joint should be tightly bonded, fully compacted and smoothly connected, when the construction is finished, the paver slightly lifts the screed plate to leave the site at the position which is approximately 1m in front of the end part, and the end part mixture is manually shoveled and then rolled; firstly placing a 6m ruler at 2-3 positions along the central line on the top surface of the compacted layer, finding out the contact position between the surface of the compacted layer with the longitudinal slope of the surface or the cross section with the thickness of the compacted layer changing and the bottom surface of the 6m ruler), and vertically removing the insufficient thickness part of the end part layer when the compacted layer is not cooled completely, so that the compacted layer is connected at right angles in the next construction;

(3) before continuously paving the mixture from the joint, checking the flatness of the end part by using a 3-meter ruler, if the flatness is not in accordance with the requirement, removing the mixture, before paving the transverse joint, coating asphalt on the joint interface, preheating the asphalt by using a screed, placing a starting backing plate under the screed of a paver, wherein the thickness of the backing plate is equal to the difference between the paving thickness of the mixture and the thickness of the compacted pavement, and the length of the backing plate is longer than the front edge distance and the rear edge distance of the screed so as to adjust the reserved height; after the mixture is paved at the transverse joint, the joint is cleaned, whether the loose pavement thickness of the newly paved mixture is proper or not is checked, when the joint is cleaned, the newly paved mixture is not pushed and scraped excessively, after the construction of the paving layer at the joint is finished, the flatness is checked by a 3 m ruler, and when the mixture is not cooled, the mixture is treated immediately;

(4) the rolling of the transverse joint is firstly carried out by using a double-steel-wheel road roller, a skid for stopping the road roller is arranged on the outer side of a rolling belt, the road roller is positioned on a compacted mixed material layer during rolling, the width of the compacted mixed material layer extending into a new layer is 15cm, and then the compacted mixed material is moved to the new layer for 15-20 cm every time until the compacted mixed material layer is completely on the new layer, and then longitudinal rolling is carried out. When the adjacent spreading layers are formed and have longitudinal seams, firstly, rolling the adjacent spreading layers with a double-steel-wheel road roller along the longitudinal seams for one time, wherein the rolling width is 15-20 cm, then, transversely rolling along the transverse seams, and finally, carrying out normal longitudinal rolling;

s7, construction of pavement marking

(1) The lane boundary adopts a white hot melt type dotted line, the line width is 0.15m, the solid line length is 6m, and the interval is 9m;

(2) before formally spraying marked lines, performing an on-site trial drawing test, determining the interval time of spraying the hot melt paint, and cleaning the road surface; and before formally spraying marked lines, firstly spraying a hot melt base oil detergent.

6. The construction method of the steel slag concrete road paving device according to claim 5, wherein the construction method comprises the following steps: the steel slag asphalt mixture is formed by stirring modified asphalt, coarse and fine aggregates and mineral powder.