CN113430886B - Application of rubber-tyred road roller in building roadbed by aeolian sand - Google Patents
Application of rubber-tyred road roller in building roadbed by aeolian sand Download PDFInfo
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- CN113430886B CN113430886B CN202110756370.8A CN202110756370A CN113430886B CN 113430886 B CN113430886 B CN 113430886B CN 202110756370 A CN202110756370 A CN 202110756370A CN 113430886 B CN113430886 B CN 113430886B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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Abstract
The invention discloses an application of a rubber-tyred road roller in the process of filling a roadbed with aeolian sand, which comprises the following steps: step A: cleaning the ground, wherein the ground is free of impurities; and B, step B: measuring and paying off, namely measuring the road surface and performing positioning lofting prior inspection; c, performing a step; filling in layers, calculating the required material consumption, and discharging; step D: roughly flattening by a bulldozer; step E: sprinkling water to wet the road surface; step F: rolling the road surface by using a smooth wheel mechanism of a smooth wheel road roller; step G: carrying out secondary rolling by using a tire mechanism of the tire type road roller; step H: rolling the road surface by using a smooth wheel mechanism of the smooth wheel vibratory roller again; step I: and measuring and waiting for the construction of the next procedure. The invention can improve the compaction effect and reduce the deflection value, and the road roller is suitable for various terrains.
Description
Technical Field
The invention relates to the technical field of pavement construction. In particular to the application of a tyre type road roller in the wind-laid sand filling roadbed.
Background
The aeolian sand has the advantages of fine and uniform particle composition, low powder clay content, low cohesive force, strong loose property, poor water retention, large permeability coefficient, small loose paving coefficient, small settling amount, quick compression, small creep and the characteristic of being most easily compacted in a water retention state, the water is very easy to lose during construction, and if the water content of sandy soil is insufficient, the sand surface 5-10cm can be rapidly loosened and expanded due to the water loss even after the compaction is finished, so that the deflection value is unstable and undesirable.
In order to reduce the damage of road construction to water and soil and the original ecological environment, the roadbed filling construction by using the aeolian sand becomes the mainstream choice in aeolian sand dunes, sand ridges and desert areas, but because of the inherent characteristics of the aeolian sand, the traditional process only uses a smooth steel wheel road roller for rolling, the construction quality of the roadbed is difficult to control, particularly the compaction degree and the deflection value cannot reach the ideal effect, but the tire mechanism of the tire type road roller used in the market at present is usually simpler in structure and shape, the material on the road surface is easily stained when the road surface is constructed, the subsequent construction is influenced, the used oil injection mechanism is usually low in efficiency, the great waste of oil and water can be caused, meanwhile, the smooth wheel mechanism of the smooth wheel road roller is simpler in structure and less in function, so that the smooth wheel mechanism is not suitable for various complex and special working conditions, so that the use of the light wheel is single.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide an application of a rubber-tyred road roller which improves the compaction effect, reduces the deflection value and is suitable for various terrains in the wind-deposited sand filling roadbed.
In order to solve the technical problems, the invention provides the following technical scheme:
the application of the rubber-tyred road roller in the wind-laid sand filling of the roadbed comprises the following steps:
step A: cleaning the ground, wherein the ground is free of impurities;
and B: measuring and paying off, namely measuring the road surface and performing positioning lofting prior inspection;
c, performing a step; filling in layers, calculating the required material consumption, and discharging;
step D: roughly flattening by a bulldozer;
step E: sprinkling water to wet the road surface;
step F: rolling the road surface by using a smooth wheel mechanism of a smooth wheel road roller;
step G: carrying out secondary rolling by using a tire mechanism of the tire type road roller;
step H: rolling the road surface by using a smooth wheel mechanism of the smooth wheel vibratory roller again;
step I: and measuring and waiting for the construction of the next procedure.
The application of the tire type road roller in the wind-laid sand filling roadbed comprises the following steps: the layered filling is to calculate the material usage required by each section plan according to the virtual paving thickness, the average width and the length of each layer, calculate the number of cars required by each section plan according to the pulling amount of each car of the material pulling car, and determine the unloading distance and the number of cars in each section; in the process of unloading the aeolian sand, the aeolian sand unloaded after the 2 nd layer is watered in time, the water content of the fine sand material of the soil yard is generally within 1.9% -3%, but the water content is subjected to various processes such as transportation, paving and the like, the water in the fine sand material is evaporated in large quantity, after the paving is finished, the water content of the raw material is reduced to 1% -2%, and the fine sand material with the water content cannot meet the construction requirement at all, so that a constructor must supplement water for the filler so as to ensure that the water content of the fine sand material can reach the construction standard in the process of construction and rolling; the construction length is up to 500m, the water content is easy to be large, the water content of the aeolian sand filler can be guaranteed to be in the best state, a bulldozer and a waterwheel are arranged behind the bulldozer and the waterwheel in the filling process, rough leveling and watering are carried out, then a smooth-wheel road roller and a tire type road roller are rolled, a slab layer is formed on the surface, the surface layer of the aeolian sand is prevented from being dry, loose and sliding, and the loose and unstable characteristics of the dry aeolian sand are restrained.
The application of the tire type road roller in the wind-laid sand filling roadbed comprises the following steps: in the rough leveling process, water spraying and wetting are carried out simultaneously, the walking speed of a sprinkler is controlled to be 2km/h-3km/h, the water content of aeolian sand is controlled to be 9% -13%, the bottom layer filler is wetted by water before each layer of filler is paved, then pushing and rolling are carried out, after a embankment body of the roadbed is filled and accepted, water is sprayed to keep the surface of the roadbed moist, waterproof geotextile is covered on the surface, water is supplied to a side slope of the embankment after the side slope is brushed, clay slope of 20cm is covered, finally a bucket of an excavator is used for beating, compacting and sealing, the water content of sandy soil can be kept, the sandy soil is prevented from being insufficient in water, a plate layer is formed in compacting, and the surface of a sand layer which is exposed for a long time can expand and loosen due to water loss when the surface of the sand layer is 5-10 cm.
The application of the tire type road roller in the wind-laid sand filling roadbed comprises the following steps: and in the rolling, when the aeolian sand is completely saturated after watering and no water mark exists on the surface layer, the smooth wheel mechanism of the smooth wheel vibratory roller is used, the traveling speed of the vibratory roller is 1.5km/h, the wheel marks are overlapped during rolling and are more than 1/3 of the width of the overlapped wheel mark, when the rolling is carried out, the static pressure is firstly carried out for 1 time, then the weak vibration is carried out for 2 times, and finally the strong vibration is carried out for 2 times, so that the working difficulty of the tire type roller is reduced through the first step of rolling.
The application of the tire type road roller in the wind-laid sand filling roadbed comprises the following steps: after the smooth wheel mechanism of the smooth wheel vibratory roller finishes rolling, a tire mechanism of a tire type roller is adopted to roll from the outer side of the roadbed to the middle, the traveling speed of the tire type roller is 2km/h, wheel tracks are overlapped during rolling, the width of the overlapped wheel tracks is more than 1/3, the rolling times are 3 times, the surface of the filler is hardened, obvious hard shells are generated, after the tire type roller rolls, compaction force can act on material particles along each direction, a kneading action generated by the elasticity of the tire is added, a good compaction effect is generated, the maximum compaction degree can be obtained, after the tire type roller rolls, a surface sand layer can be hardened to form a layer of hard shell of 3cm-5cm, thus the water loss can be reduced, the overall stability of the roadbed can be improved, the stability and the bearing capacity of the aeolian sandy roadbed are improved by the construction method, the problem of overhigh deflection value of the roadbed is effectively solved, so that the construction method is suitable for roadbed construction of various aeolian sand filling.
The application of the tire type road roller in the wind-laid sand filling roadbed is characterized in that in the step H: after the smooth wheel mechanism of the smooth wheel vibratory roller is rolled, the compaction degree of the road surface is greater than 96% by measuring 2 positions per compaction layer per 200m, the deflection value is controlled to be less than 1.8mm by measuring 80-100 points per kilometer of two lanes, and various indexes reach expectation after the rolling, so that the overall stability of the roadbed is improved.
The tire type road roller is applied to the wind-accumulated sand filling roadbed, and the tire mechanism comprises a support frame, a fixed block, a rotating roller, a tire, a spraying plate, an atomizing nozzle, a spraying pipe, a flow regulator, an oil-water mixing box, a first pump, a heating pipe, a feeding pipe, a threaded cylinder, a lead screw, a hand wheel, a sliding block, a sliding plate, a collecting box, a scraping plate, a collecting hopper, an inclined plate, a hose, a second pump, a filter box, a filter plate, a waste material box and an outlet pipe; one end of the supporting frame is connected with the tire type road roller, the number of the supporting frames is two, a fixed block is fixedly connected to one side face, opposite to the two supporting frames, of the fixed block, a rotating roller is connected to the inside of the fixed block in a rotating mode, tires are fixedly mounted on the outer surfaces of the rotating roller, a spray plate is arranged at the front end of each tire, an atomizing nozzle is arranged inside the spray plate, an outlet section of the atomizing nozzle is opposite to the outer surface of each tire, the atomizing nozzle is not in contact with the tires, a gap is reserved between the atomizing nozzle and the tires, the atomizing nozzle is connected with one end of a spray pipe inside the spray plate, a flow regulator is arranged inside the spray pipe, a control end of the flow regulator is connected to a control panel of a cockpit, the other end of the spray pipe is inserted into an oil-water mixing box, a partition plate is arranged on the upper portion inside the oil-water mixing box, and a first pump is arranged at the top of the partition plate, the first pump is connected with the spray pipe, the outer surface of the oil-water mixing box is provided with a heating pipe, and one side surface of the oil-water mixing box is inserted with a feeding pipe; the rear end of the fixed block is fixedly provided with a threaded cylinder, the outer surface of the threaded cylinder is provided with a chute, the chute penetrates through the upper end and the lower end of the threaded cylinder, the interior of the threaded cylinder is rotatably connected with a lead screw, the top of the lead screw is connected with the inner top of the threaded cylinder through a bearing, the bottom of the lead screw is provided with a hand wheel, the outer surface of the lead screw is provided with a sliding block in a sliding manner, the upper surface of the sliding block is fixedly provided with a sliding plate, one end of the sliding plate is fixedly connected with a collecting box, the collecting box is in direct contact with the rear end of a tire, one surface of the collecting box, which is in contact with the tire, is provided with a collecting hole, the upper end and the lower end of the collecting hole are provided with a scraping plate and a collecting hopper, one end of the scraping plate, which is in contact with the tire, the interior of the collecting hopper is in an inner conical shape, the inner bottom wall of the collecting box is fixedly provided with a sloping plate, and the sloping plate is arranged at the upper part and the lower part of the right part and the left part, the lower end of the inclined plate in the collecting box is inserted with a hose, the hose is connected with the output end of a second pump, the second pump is fixedly arranged at the rear end of the collecting box, the outlet end of the hose is inserted into the filter box, the middle inclined plane in the filter box is provided with a filter plate, the side surface of the filter box is provided with a waste material port, the lower end of the filter plate is connected with the waste material port, the outlet end of the waste material port is connected with the feed end of the waste material box, the waste material box is movably arranged on the side surface of the filter box, the bottom of the filter box is inserted with an outlet pipe, the outlet pipe is connected with a feed pipe on the side surface of an oil-water mixing box, and when the road roller works, the phenomenon that tires are infected with aeolian sand can be prevented through a tire mechanism, the normal operation of the road roller is ensured, the rolling effect is prevented from being reduced, and the sprayed oil-water mixture is recycled, the two spraying of the oil-water mixture are controlled, so that the resource is saved, and the waste is prevented.
The rubber-tyred road roller is applied to the wind-laid sand filling roadbed, and the rubber-tyred mechanism comprises a rubber-tyred wheel, a first threaded hole, a second threaded hole, a clamping block, a sealing gasket, a sealing ring, a third threaded hole, an installation block, a leveling machine, a cylinder, a controller, a top column, a fixed bin, a cam column, a limiting rod, a limiting box, a spring, a motor, a rotating shaft, an eccentric wheel and a transmission belt; the side surface of the smooth wheel is provided with a mounting plate, the outer surface of the mounting plate is provided with four first threaded holes, the outer surface of each mounting plate is provided with two first threaded holes which form a group, the outer surface of the smooth wheel is provided with a clamping groove, the inner bottom wall of the clamping groove is provided with a second threaded hole, the inside of the clamping groove is clamped with four clamping blocks, the four clamping blocks are clamped on the outer surface of the smooth wheel in an annular array mode and are arranged in a staggered mode with the mounting plate, a sealing gasket is filled in the clamping groove, the outer surface of the sealing ring is provided with a third threaded hole, the sealing ring is connected with the side surface of the smooth wheel through a third threaded hole, the top of the sealing ring is connected with the mounting block through a connecting block, the front end of the sealing ring is provided with a flat pushing machine, the inside of the flat pushing machine is hollow, the bottom of the flat pushing machine is provided with a through hole, and the top of the flat pushing machine is provided with an inlet pipe; the structure comprises a smooth wheel, a cavity is arranged in the smooth wheel, an air cylinder is fixedly arranged on one side in the cavity, a controller is arranged on the outer surface of the air cylinder, the control end of the controller is connected to a control panel of a cockpit, the output end of the air cylinder is connected with a top post, the top post is conical, the larger end face of the top post is connected with the output end of the air cylinder, a fixing bin is fixedly arranged in the smooth wheel, a sliding hole is formed in the outer surface of the fixing bin, a cam post is arranged in the sliding hole in a sliding mode, a groove is formed in the outer surface of the smooth wheel, the cam post penetrates through the outer surface of the smooth wheel and is clamped with the groove, the outer surface of the cam post and the outer surface of the groove are both filled with materials with larger density for sealing, the bottom of the cam post penetrates through the fixing bin to be in contact with the top post, and a limiting post is fixedly arranged on the outer surface of the cam post, the bottom of the limiting column is fixedly provided with a limiting rod, the bottom of the limiting rod is inserted into the limiting box, the limiting box can fixedly limit the limiting rod, the top of the limiting rod is provided with a spring, the spring has a large elastic coefficient, and the top of the spring is in contact with the inner top wall of the smooth wheel; the bottom of one side face inside the smooth wheel is provided with a motor, the output end of the motor is connected with a rotating shaft, the outer surface of the rotating shaft is fixedly provided with an eccentric wheel, the other end of the rotating shaft is rotatably connected with the inside of one end of a driving belt, the other end of the driving belt is rotatably connected with the rotating shaft at the top inside the smooth wheel, the two rotating shafts are consistent in structure, the outer surface of one rotating shaft is fixedly provided with two eccentric wheels, the two side faces inside the smooth wheel are consistent in structure, the smooth wheel can be used under different working conditions through the arrangement of a smooth wheel mechanism, is suitable for different terrains and can be rapidly changed, the smooth wheel mechanism is simple and convenient to use, when working on different road surfaces, the cam structure can be used sometimes in order to deal with different road surfaces and working conditions, the device can be adjusted to change the smooth wheel mechanism into the cam mechanism, the method is suitable for different terrains and has wide application range.
The technical scheme of the invention achieves the following beneficial technical effects:
1. the water content of the fine sand material of the soil yard is generally within 1.9% -3%, but the fine sand material undergoes various processes such as transportation and paving, the moisture in the fine sand material can be evaporated in a large amount, after the paving is completed, the water content of the raw material can be reduced to 1% -2%, the fine sand material with the water content can not meet the construction requirements at all, therefore, constructors must replenish water for the filler, the water content of the fine sand material can reach the construction standard in the construction rolling process, meanwhile, the construction length can be filled at one time with the length of 500m, the water content is easy to be large, the water content of the aeolian sand filler is ensured to be in the optimal state, the surface layer of the aeolian sand can be prevented from being dried, loosened and sliding, and the loose and unstable characteristics of the dry aeolian sand can be restrained.
2. The water content of the sand can be kept, the phenomenon that the sand is not enough in water content and is compacted to form a plate layer is prevented, and the sand surface expands and loosens due to water loss after 5-10cm of the sand surface is exposed for a long time.
3. The method fully utilizes the operating characteristics of the tire type road roller, the compaction force can act on material particles in all directions after the rolling of the tire type road roller, and a kneading effect generated by the elasticity of the tire is added, so that a good compaction effect is generated, the maximum compactness can be obtained, and after the rolling of the tire type road roller, a surface sand layer can be hardened to form a layer of hard shell of 3cm-5cm, so that the loss of water can be reduced, the overall stability of the roadbed can be improved, the stability and the bearing capacity of the aeolian sand roadbed are improved, the problem of overhigh roadbed deflection value is effectively solved, and the method is suitable for the construction of various roadbed filled with aeolian sand.
4. Through tire mechanism, can realize carrying out the during operation to the road roller, prevent that the tire from being infected with the phenomenon of aeolian sand, guarantee the normal operating of road roller, prevent to roll the effect and descend, carry out recycle with the oil water mixture who sprays simultaneously, control oil water mixture spray two, resources are saved prevents extravagantly.
5. Through the setting of aureola mechanism, can realize the use under the different operating modes, be applicable to different topography, and can be quick transform, convenience simple to use carries out the during operation on different road surfaces, in order to deal with different road surfaces and operating modes, can use the cam structure sometimes, and this device can be through adjusting for aureola mechanism becomes cam mechanism, is applicable to different topography, and application range is extensive.
6. After the construction method is applied to the aeolian sand construction, the process for filling the roadbed by the aeolian sand is more perfect and mature, the rework phenomenon caused by too high deflection value and insufficient compactness is eliminated, the material such as the aeolian sand can really replace the traditional roadbed filling material, the construction difficulty and the construction cost are reduced, the utilization rate of manpower and machinery is improved, the evaporation and the loss of roadbed construction water are reduced, and the consumption of the water is reduced.
7. The construction method of the invention effectively reduces the deflection value of the roadbed while improving the compaction degree of the roadbed, so that the wind-deposited sand filling roadbed becomes a mature and stable construction technology, simultaneously, the problem of overhigh deflection value of the roadbed is effectively solved due to the improvement of the stability and the bearing capacity of the wind-deposited sand roadbed, the highway can run for a long time, the later-period pavement maintenance is reduced or other measures are continuously adopted to control the deflection of the roadbed, the unforeseeable factors of the later-period roadbed filling by the wind-deposited sand are reduced, the wind-deposited sand can be used in wind-deposited sand dunes, sand ridges and desert areas without considering good earthwork, a large amount of mechanical energy and human resources are saved, and in conclusion, the construction method of the invention has obvious economic benefit, wide application prospect, improves the integrity of the roadbed and pavement, prolongs the construction life of the highway, shortens the construction period, the economic development speed of the region is accelerated, the traffic capacity and the service level of the highway are improved, the satisfaction degree of highway users is enhanced, and the social benefit is remarkable.
Drawings
FIG. 1 is a schematic structural view of a tire mechanism of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A according to the present invention;
FIG. 3 is a schematic view of the structure of the collection box in the tire mechanism of the present invention;
FIG. 4 is a schematic view of the internal structure of the smooth wheel mechanism of the present invention;
FIG. 5 is a schematic diagram of a configuration of a photo wheel in the photo wheel mechanism of the present invention;
FIG. 6 is a schematic view of the seal ring of the photo wheel mechanism of the present invention;
FIG. 7 is a schematic view of a cam post of the optical wheel mechanism of the present invention;
FIG. 8 is a schematic diagram of the eccentric wheel of the photo wheel mechanism of the present invention.
The reference numbers in the figures denote: 101-a support frame; 102-fixed block; 103-a turning roll; 104-a tyre; 105-spraying a plate; 106-atomizer; 107-spray pipes; 108-a flow regulator; 109-an oil-water mixing tank; 110-a first machine pump; 111-heating tube; 112-a feed pipe; 113-a threaded cylinder; 114-a lead screw; 115-a hand wheel; 116-a slide; 117-a sled; 118-a collection bin; 119-a scraper; 120-a collecting hopper; 121-a sloping plate; 122-a hose; 123-a second pump; 124-a filter box; 125-a filter plate; 126-waste bin; 127-an outlet pipe; 201-a smooth wheel; 202-a first threaded hole; 203-a second threaded hole; 204-a clamping block; 205-a gasket; 206-a sealing ring; 207-third threaded hole; 208-a mounting block; 209-leveling machine; 210-a cylinder; 211-a controller; 212-top post; 213-fixed bin; 214-cam post; 215-a spacing post; 216-a stop lever; 217-limit box; 218-a spring; 219-a motor; 220-a rotating shaft; 221-eccentric wheel; 222-drive belt.
Detailed Description
Application of tyre type road roller in wind-laid sand filling roadbed
In a construction project from a certain section to a certain highway, the section is located at the north side of a yellow river basin, the south side of a mountain is short of available good roadbed fillers, but the wind-deposited sand reserves in a certain city of the south bank of the yellow river are abundant, so that the wind-deposited sand roadbed filler test is carried out by adopting the application method of the tire type road roller in the wind-deposited sand filling roadbed at the section, and the problems of difficult material taking, low efficiency and insufficient compaction in the section are successfully solved, and the method specifically comprises the following steps:
step A: cleaning the ground, wherein the ground is free of impurities;
and B: measuring and paying off, namely measuring the road surface and performing positioning lofting prior inspection;
c, performing a step; filling in layers, calculating the required material consumption, and discharging;
step D: roughly flattening by a bulldozer;
step E: sprinkling water to wet the road surface;
step F: rolling the road surface by using a smooth wheel mechanism of a smooth wheel road roller;
step G: carrying out secondary rolling by using a tire mechanism of the tire type road roller;
step H: rolling the road surface by using a smooth wheel mechanism of the smooth wheel vibratory roller again;
step I: and measuring and waiting for the construction of the next procedure.
In step C: the layered filling is to calculate the material usage required by each section plan according to the virtual paving thickness, the average width and the length of each layer, calculate the number of cars required by each section plan according to the pulling amount of each car of the material pulling car, and determine the unloading distance and the number of cars in each section; in the process of unloading the aeolian sand, the aeolian sand unloaded after the 2 nd layer is watered in time, the water content of the fine sand material of the soil yard is generally within 1.9% -3%, but the water content of the fine sand material is evaporated in a large amount after various processes such as transportation, paving and the like are carried out, after the pushing and paving are finished, the water content of the raw material is reduced to 1% -2%, the fine sand material with the water content can not meet the construction requirement at all, therefore, constructors must supplement water to the filler, and the water content of the fine sand material can reach the construction standard in the process of construction and rolling; the construction length is up to 500m, the water content is easy to be large, the water content of the aeolian sand filler can be guaranteed to be in the best state, a bulldozer and a waterwheel are arranged behind the bulldozer and the waterwheel in the filling process, rough leveling and watering are carried out, then a smooth-wheel road roller and a tire type road roller are rolled, a slab layer is formed on the surface, the surface layer of the aeolian sand is prevented from being dry, loose and sliding, and the loose and unstable characteristics of the dry aeolian sand are restrained.
In step E: in the rough leveling process, water spraying and wetting are carried out simultaneously, the walking speed of a sprinkler is controlled to be 2km/h-3km/h, the water content of aeolian sand is controlled to be 9% -13%, the bottom layer filler is wetted by water before each layer of filler is paved, then pushing and rolling are carried out, after a embankment body of the roadbed is filled and accepted, water is sprayed to keep the surface of the roadbed moist, waterproof geotextile is covered on the surface, water is supplied to a side slope of the embankment after the side slope is brushed, clay slope of 20cm is covered, finally, an excavator bucket is used for pressing, compacting and sealing, the water content of sand can be kept, the situation that the water content of the sand is insufficient, a plate layer is formed in compaction, and the surface of a sand layer which is exposed for a long time can expand and loosen due to water loss when the soil is 5-10 cm.
In step F: and rolling, namely after the aeolian sand is fully saturated by water and no water mark exists on the surface layer, using a smooth wheel mechanism of a smooth wheel vibratory roller, wherein the traveling speed of the vibratory roller is 1.5km/h, the wheel marks are overlapped during rolling, the width of the overlapped wheel marks is more than 1/3, and when rolling, firstly carrying out static pressure for 1 time, secondly carrying out weak vibration for 2 times, and finally carrying out strong vibration for 2 times, and reducing the working difficulty of the tire type roller through the first step of rolling.
In step G: after the smooth wheel mechanism of the smooth wheel vibratory roller finishes rolling, a tire mechanism of a tire type roller is adopted to roll from the outer side of the roadbed to the middle, the traveling speed of the tire type roller is 2km/h, wheel tracks are overlapped during rolling, the width of the overlapped wheel tracks is more than 1/3, the rolling times are 3 times, the surface of the filler is hardened, and obvious hard shells are generated, after the tire type roller rolls, the compaction force can act on material particles along each direction, and a kneading action generated by the elasticity of the tire is added, so that a good compaction effect is generated, the maximum compaction degree can be obtained, after the tire type roller rolls, a surface sand layer can be hardened to form a layer of hard shell of 3cm-5cm, the water loss can be reduced, the overall stability of the roadbed can be improved, the stability and the bearing capacity of the aeolian sandy roadbed can be improved, the problem of overhigh deflection value of the roadbed is effectively solved, so that the construction method is suitable for roadbed construction of various aeolian sand filling.
In step H: after the smooth wheel mechanism of the smooth wheel vibratory roller rolls, the compaction degree of the road surface is greater than 96% by measuring 2 positions per compaction layer per 200m, the deflection value is controlled to be less than 1.8mm by measuring 80-100 points per kilometer of the double lanes, various indexes reach expectation, and the overall stability of the roadbed is improved.
As shown in fig. 1, the tire mechanism includes a support frame 101, a fixed block 102, a rotating roller 103, a tire 104, a spray plate 105, an atomizing nozzle 106, a spray pipe 107, a flow regulator 108, an oil-water mixing tank 109, a first pump 110, a heating pipe 111, a feed pipe 112, a threaded cylinder 113, a lead screw 114, a hand wheel 115, a slide block 116, a slide plate 117, a collection tank 118, a scraper 119, a collection hopper 120, an inclined plate 121, a hose 122, a second pump 123, a filter tank 124, a filter plate 125, a waste tank 126, and an outlet pipe 127; one end of a support frame 101 is connected with a tire type road roller, the number of the support frames 101 is two, one opposite side surfaces of the two support frames 101 are fixedly connected with a fixed block 102, the inside of the fixed block 102 is rotatably connected with a rotating roller 103, the outer surface of the rotating roller 103 is fixedly provided with a tire 104, the front end of the tire 104 is provided with a spray plate 105, the inside of the spray plate 105 is provided with an atomizing nozzle 106, the outlet section of the atomizing nozzle 106 is opposite to the outer surface of the tire 104, the atomizing nozzle 106 is not in contact with the tire 104, a gap is reserved between the atomizing nozzle 106 and the tire 104, the atomizing nozzle 106 is connected with one end of a spray pipe 107 inside the spray plate 105, the inside of the spray pipe 107 is provided with a flow regulator 108, the control end of the flow regulator 108 is connected to a control panel of a cockpit, the other end of the spray pipe 107 is inserted into an oil-water mixing tank 109, the upper part inside of the oil-water mixing tank 109 is provided with a partition plate, the top of the partition plate is provided with a first pump 110, the first pump 110 is connected with the spray pipe 107, the outer surface of the oil-water mixing box 109 is provided with a heating pipe 111, and one side surface of the oil-water mixing box 109 is inserted with a feeding pipe 112; as shown in fig. 2-3, a threaded cylinder 113 is fixedly mounted at the rear end of the fixed block 102, a sliding groove is formed in the outer surface of the threaded cylinder 113, the sliding groove penetrates through the upper end and the lower end of the threaded cylinder 113, a lead screw 114 is rotatably connected inside the threaded cylinder 113, the top of the lead screw 114 is connected with the inner top of the threaded cylinder 113 through a bearing, a handwheel 115 is arranged at the bottom of the lead screw 114, a slider 116 is slidably arranged on the outer surface of the lead screw 114, a sliding plate 117 is fixedly mounted on the upper surface of the slider 116, a collecting box 118 is fixedly connected at one end of the sliding plate 117, the collecting box 118 is in direct contact with the rear end of the tire 104, a collecting hole is formed in the contact surface of the collecting box 118 and the tire 104, a scraping plate 119 and a collecting bucket 120 are arranged at the upper end and the lower end of the collecting hole, an oil absorbent cotton is arranged at the contact end of the scraping plate 119 and the tire 104, the inner portion of the collecting bucket 120 is in an inner conical shape, and an inclined plate 121 is fixedly mounted on the inner bottom wall of the collecting box 118, the inclined plate 121 is placed in a high right position and a low left position, the hose 122 is inserted into the lower end of the inclined plate 121 in the collection box 118, the hose 122 is connected with the output end of the second pump 123, the second pump 123 is fixedly mounted at the rear end of the collection box 118, the outlet end of the hose 122 is inserted into the filter box 124, the filter plate 125 is placed on the middle inclined plane in the filter box 124, a waste port is formed in the side face of the filter box 124, the lower end of the filter plate 125 is connected with the waste port, the outlet end of the waste port is connected with the feed end of the waste box 126, the waste box 126 is movably mounted on the side face of the filter box 124, the outlet pipe 127 is inserted into the bottom of the filter box 124, and the outlet pipe 127 is connected with the feed pipe 112 on the side face of the oil-water mixing box 109.
As shown in fig. 4-5, the photo wheel mechanism includes a photo wheel 201, a first threaded hole 202, a second threaded hole 203, a clamping block 204, a sealing pad 205, a sealing ring 206, a third threaded hole 207, a mounting block 208, a leveling machine 209, an air cylinder 210, a controller 211, a top post 212, a fixing bin 213, a cam post 214, a limiting post 215, a limiting rod 216, a limiting box 217, a spring 218, a motor 219, a rotating shaft 220, an eccentric wheel 221, and a transmission belt 222; the side surface of the photo wheel 201 is provided with a mounting plate, the outer surface of the mounting plate is provided with four first threaded holes 202, the outer surface of each mounting plate is provided with two first threaded holes 202 which form a group, the outer surface of the photo wheel 201 is provided with a clamping groove, the inner bottom wall of the clamping groove is provided with a second threaded hole 203, the inside of the clamping groove is clamped with four clamping blocks 204, the number of the clamping blocks 204 is four, the four clamping blocks 204 are all clamped on the outer surface of the photo wheel 201 in an annular array mode and are arranged in a staggered mode with the mounting plate, and a sealing gasket 205 is filled in the clamping groove; as shown in fig. 6, a third threaded hole 207 is formed in the outer surface of the sealing ring 206, the sealing ring 206 is connected with the side surface of the smooth wheel 201 through the third threaded hole 207, the top of the sealing ring 206 is connected with an installation block 208 through a connection block, a leveling machine 209 is arranged at the front end of the sealing ring 206, the interior of the leveling machine 209 is hollow, a through hole is formed in the bottom of the leveling machine 209, and an inlet pipe is arranged at the top of the leveling machine 209; as shown in fig. 7, a cavity is formed inside the smooth wheel 201, an air cylinder 210 is fixedly installed at one side inside the cavity, a controller 211 is arranged on the outer surface of the air cylinder 210, a control end of the controller 211 is connected to a control panel of a cockpit, an output end of the air cylinder 210 is connected with a top post 212, the top post 212 is conical, a larger end surface is connected with the output end of the air cylinder 210, a fixing bin 213 is fixedly installed inside the smooth wheel 201, a sliding hole is formed in the outer surface of the fixing bin 213, a cam post 214 is slidably arranged inside the sliding hole, a groove is formed in the outer surface of the smooth wheel 201, the cam post 214 penetrates through the outer surface of the smooth wheel 201 to be clamped with the groove, the outer surface of the cam post 214 and the outer surface of the groove are both filled with a material with a large density to be sealed, the bottom of the cam post 214 penetrates through the fixing bin 213 to be in contact with the top post 212, a limiting post 215 is fixedly installed on the outer surface of the cam post 214, a limiting rod 216 is fixedly installed at the bottom of the limiting column 215, the bottom of the limiting rod 216 is inserted into a limiting box 217, the limiting box 217 can fix and limit the limiting rod 216, a spring 218 is arranged at the top of the limiting rod 216, the spring 218 has a large elastic coefficient, and the top of the spring 218 is in contact with the inner top wall of the smooth wheel 201; as shown in fig. 8, a motor 219 is disposed at the bottom of one side surface inside the aureola 201, an output end of the motor 219 is connected with a rotating shaft 220, an eccentric wheel 221 is fixedly mounted on the outer surface of the rotating shaft 220, the other end of the rotating shaft 220 is rotatably connected with the inside of one end of a driving belt 222, the other end of the driving belt 222 is rotatably connected with the rotating shaft 220 at the top inside the aureola 201, the two rotating shafts 220 have the same structure, two eccentric wheels 221 are fixedly mounted on the outer surface of one rotating shaft 220, and the two side surfaces inside the aureola 201 have the same structure.
The working principle is as follows: by starting the first pump 110, the spray pipe 107 extracts the oil-water mixture in the oil-water mixing tank 109, the flow rate is adjusted by the flow regulator 108, then the oil-water mixture is sprayed out in a mist form by the atomizing nozzle 106, the atomizing nozzle 106 sprays the oil-water mixture to the outer surface of the tire 104, so that when the tire 104 rolls the road surface, windy sand is prevented from being stained on the outer surface of the tire 104, after the tire 104 with the oil-water mixture on the surface rolls the road surface, the tire 104 is scraped by the scraper 119 at the rear end, the scraped oil-water mixture is sent to the inside of the filter tank 124 through the hose 122, so that the filter 125 filters the oil-water mixture, the filtered oil-water mixture is sent to the inside of the oil-water mixing tank 109 through the outlet pipe 127 for repeated use, when the oil-water mixture is not used, the tire can be ensured not to be stained with soil and the like, and the problem of rolling the road surface can be prevented, meanwhile, when the device is stopped, or when a large amount of oil and water is used, the adjustment can be carried out through the flow regulator 108, the hand wheel 115 is rotated, the slide block 116 drives the collection box 118 to move downwards, the position of the collection box 118 is adjusted, when the photo wheel mechanism is used, the clamping block 204 is disassembled, so that the photo wheel 201 forms a small cam mechanism, in addition, the air cylinder 210 is started, the top pillar 212 is inserted into the fixed bin 213, at the moment, the cam pillar 214 is ejected out of the outer surface of the photo wheel 201, so that the photo wheel 201 forms a large cam structure, the photo wheel mechanism is suitable for different terrains and is convenient to use, when the photo wheel mechanism is used, the air cylinder 210 retracts, the cam pillar 214 pushes the bottom of the cam pillar 214 back into the limiting box 217 through the limiting pillar 215 due to the elastic force of the spring 218, at the moment, the limiting box 217 is clamped on the bottom of the limiting pillar 215, prevent appearing rocking, and the recess all sets up by sealing material with the surface of cam post 214, consequently when cam post 214 retracts, the surface of aureola 201 is still smooth, when aureola 201 rolled the road surface, through installation sealing ring 206 for it plays limiting displacement to joint block 204, and the push flat machine 209 of sealing ring 206 one side rolls advance further push flat to aureola 201 simultaneously, reduces the degree of difficulty that aureola 201 rolled, improves the effect that rolls simultaneously.
Second, safety measures
2.1, the construction method is executed according to the specified requirements of the road engineering construction safety technical specification, and specific safety technical measures and safety plans are made according to the characteristic that the tire type road roller has higher walking speed.
2.2 the construction vehicle must be in a perfect state, and all mechanical operations and drivers should carry out construction procedures and safety education training to ensure the driving safety of the vehicle.
2.3 high fill and dangerous area set up striking safety sign, construction crossing dispatch special person guard or have obvious sign, prevent personnel and vehicle from unnoticed emergence incident.
2.4 when the machine works on the slope side and the groove, the necessary safety distance is kept between the machine and the edge, so that the tire is pressed on the solid ground, the slope condition is observed at any time, and measures are taken immediately when hidden dangers are found to ensure safety.
Third, environmental protection measure
3.1, reasonably arranging according to the actual situation of the site, ensuring that the road in a construction area is smooth, flat and tidy, and has no messy pile or scattered objects; the field is flat without water accumulation, and the drainage becomes a system, so the drainage is smooth and is not blocked.
3.2 Material transportation management
The transportation of the aeolian sand material can cause the bad phenomena of scattering, leakage, flying and the like in the transportation process, cause flying dust pollution and other environmental influences and need to be controlled.
3.2.1, cleaning and transporting garbage and entering the arena material, wherein construction vehicles need to be covered completely by tarpaulin, closed transportation is implemented, and vehicles which do not reach the standard are forbidden to enter the arena for transportation;
3.2.2 forbidding overload, and ensuring the complete sealing of the carriage without leakage;
3.2.3 when the automatic reverse-falling is carried out, the automatic reverse-falling must be carried out slowly, and the phenomenon that the oil filling door is violently added to cause dust rushing out of the exhaust pipe is forbidden to generate dust.
3.3 the construction road planning and setting are made before the construction in the construction site, the permanent construction road in the design is utilized as much as possible, a watering and dust-falling system is established, special watering equipment and a designated special person are equipped for the construction site, and watering and dust-falling are carried out on the construction road which is easy to generate the raised dust.
3.4 in the mechanized construction process, the pollution of noise, waste gas, waste water and dust, etc. is reduced as much as possible to ensure the health of local people.
3.5 after the construction, in time demolish all temporary facilities as required to with building site and surrounding environment clearance clean and tidy, accomplish that the work is done, the material is clear, the place is clean, arrange in order the recovery to getting the soil yard, must have corresponding soil and water conservation measure.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (6)
1. The application of the rubber-tyred road roller in the wind-laid sand filling of the roadbed is characterized by comprising the following steps:
step A: cleaning the ground, wherein the ground is free of impurities;
and B: measuring and paying off, namely measuring the road surface and performing positioning lofting prior inspection;
c, performing a step; filling in layers, calculating the required material consumption, and discharging;
step D: roughly flattening by a bulldozer;
step E: sprinkling water to wet the road surface;
step F: rolling the road surface by using a smooth wheel mechanism of a smooth wheel road roller;
step G: carrying out secondary rolling by using a tire mechanism of the tire type road roller;
step H: rolling the road surface by using a smooth wheel mechanism of the smooth wheel vibratory roller again;
step I: measuring, and waiting for the construction of the next procedure;
the tire mechanism comprises a support frame (101), a fixed block (102), a rotating roller (103), a tire (104), a spray plate (105), an atomizing spray head (106), a spray pipe (107), a flow regulator (108), an oil-water mixing box (109), a first pump (110), a heating pipe (111), a feeding pipe (112), a threaded cylinder (113), a lead screw (114), a hand wheel (115), a sliding block (116), a sliding plate (117), a collecting box (118), a scraping plate (119), a collecting hopper (120), an inclined plate (121), a hose (122), a second pump (123), a filter box (124), a filter plate (125), a waste material box (126) and an outlet pipe (127);
the one end of support frame (101) is connected with the rubber-tyred roller, the quantity of support frame (101) is two, two relative side fixedly connected with fixed block (102) of support frame (101), the inside rotation of fixed block (102) is connected with and rotates roller (103), the external fixed surface of rotating roller (103) installs tire (104), the front end of tire (104) is provided with spout board (105), the inside of spouting board (105) is provided with atomizer (106), the export section of atomizer (106) is relative with the surface of tire (104), and contactless between atomizer (106) and tire (104), the middle space that leaves, atomizer (106) are connected with the one end of spray tube (107) inside spout board (105), the inside of spray tube (107) is provided with flow regulator (108), the control end of flow regulator (108) is connected to the control panel of cockpit, the other end of the spray pipe (107) is inserted into the oil-water mixing tank (109), a partition plate is arranged at the upper part inside the oil-water mixing tank (109), a first pump (110) is arranged at the top of the partition plate, the first pump (110) is connected with the spray pipe (107), a heating pipe (111) is arranged on the outer surface of the oil-water mixing tank (109), and a feeding pipe (112) is inserted into one side surface of the oil-water mixing tank (109);
the rear end of the fixed block (102) is fixedly provided with a threaded cylinder (113), the outer surface of the threaded cylinder (113) is provided with a sliding groove, the sliding groove penetrates through the upper end and the lower end of the threaded cylinder (113), the inner part of the threaded cylinder (113) is rotatably connected with a lead screw (114), the top of the lead screw (114) is connected with the inner top of the threaded cylinder (113) through a bearing, the bottom of the lead screw (114) is provided with a hand wheel (115), the outer surface of the lead screw (114) is provided with a sliding block (116) in a sliding manner, the upper surface of the sliding block (116) is fixedly provided with a sliding plate (117), one end of the sliding plate (117) is fixedly connected with a collecting box (118), the collecting box (118) is in direct contact with the rear end of the tire (104), one surface of the collecting box (118) in contact with the tire (104) is provided with a collecting hole, and the upper end and the lower end of the collecting hole are provided with a scraping plate (119) and a collecting hopper (120), the oil absorption cotton is arranged at one end, in contact with a tire (104), of the scraper (119), the collecting hopper (120) is internally conical, an inclined plate (121) is fixedly mounted on the inner bottom wall of the collecting box (118), the inclined plate (121) is arranged at the right high position and the left low position, a hose (122) is inserted into the lower end of the inclined plate (121) in the collecting box (118), the hose (122) is connected with the output end of a second pump (123), the second pump (123) is fixedly mounted at the rear end of the collecting box (118), the outlet end of the hose (122) is inserted into the filtering box (124), a filtering plate (125) is placed on the inclined plane in the middle of the inside of the filtering box (124), a waste material port is formed in the side surface of the filtering box (124), the lower end of the filtering plate (125) is connected with the waste material port, the outlet end of the waste material port is connected with the feed end of the waste material box (126), the waste tank (126) is movably arranged on the side surface of the filter tank (124), an outlet pipe (127) is inserted into the bottom of the filter tank (124), and the outlet pipe (127) is connected with a feeding pipe (112) on the side surface of the oil-water mixing tank (109);
the polishing wheel mechanism comprises a polishing wheel (201), a first threaded hole (202), a second threaded hole (203), a clamping block (204), a sealing gasket (205), a sealing ring (206), a third threaded hole (207), an installation block (208), a flattening machine (209), an air cylinder (210), a controller (211), a top column (212), a fixed bin (213), a cam column (214), a limiting column (215), a limiting rod (216), a limiting box (217), a spring (218), a motor (219), a rotating shaft (220), an eccentric wheel (221) and a transmission belt (222);
the side of smooth wheel (201) is provided with the mounting panel, first screw hole (202) has been seted up to the surface of mounting panel, the quantity of mounting panel is four, the surface of every mounting panel is provided with two first screw hole (202) and is a set of, the surface of smooth wheel (201) has been seted up the joint groove, second screw hole (203) has been seted up to the inner diapire in joint groove, the inside joint in joint groove has joint piece (204), the quantity of joint piece (204) is four, four joint piece (204) all with the form joint of annular array at the surface of smooth wheel (201), and stagger the setting with the mounting panel, the inside packing in joint groove has sealed the pad (205), third screw hole (207) has been seted up to the surface of sealing ring (206), sealing ring (206) are connected through third screw hole (207) and the side of smooth wheel (201), the top of the sealing ring (206) is connected with an installation block (208) through a connection block, a flat pushing machine (209) is arranged at the front end of the sealing ring (206), the interior of the flat pushing machine (209) is hollow, a through hole is formed in the bottom of the flat pushing machine (209), and an inlet pipe is arranged at the top of the flat pushing machine (209);
the cavity is formed in the smooth wheel (201), a cylinder (210) is fixedly mounted on one side of the interior of the cavity, a controller (211) is arranged on the outer surface of the cylinder (210), a control end of the controller (211) is connected to a control panel of a cockpit, an output end of the cylinder (210) is connected with a top column (212), the top column (212) is conical in shape, one large end face of the top column is connected with an output end of the cylinder (210), a fixed bin (213) is fixedly mounted in the smooth wheel (201), a sliding hole is formed in the outer surface of the fixed bin (213), a cam column (214) is arranged in the sliding hole in a sliding mode, a groove is formed in the outer surface of the smooth wheel (201), the cam column (214) penetrates through the outer surface of the smooth wheel (201) to be clamped with the groove, and the outer surface of the cam column (214) and the outer surface of the groove are sealed, the bottom of the cam column (214) penetrates through the fixed bin (213) to be in contact with the top column (212), a limiting column (215) is fixedly mounted on the outer surface of the cam column (214), a limiting rod (216) is fixedly mounted at the bottom of the limiting column (215), the bottom of the limiting rod (216) is inserted into the limiting box (217), the limiting box (217) can fix and limit the limiting rod (216), a spring (218) is arranged at the top of the limiting rod (216), and the top of the spring (218) is in contact with the inner top wall of the smooth wheel (201);
the bottom of the inside side of aureola (201) is provided with motor (219), the output of motor (219) is connected with axis of rotation (220), the outer fixed surface of axis of rotation (220) installs eccentric wheel (221), the other end of axis of rotation (220) is connected with the inside rotation of drive belt (222) one end, the other end of drive belt (222) rotates with axis of rotation (220) at the inside top of aureola (201) and is connected, the structure of two axis of rotation (220) is unanimous, the outer fixed surface of an axis of rotation (220) installs two eccentric wheels (221), the inside both sides face structure of aureola (201) is unanimous.
2. Use of a tyred roller according to claim 1 in the construction of a aeolian sand filled subgrade, in step C: the layered filling is to calculate the material usage required by each section plan according to the virtual paving thickness, the average width and the length of each layer, calculate the number of cars required by each section plan according to the pulling amount of each car of the material pulling car, and determine the unloading distance and the number of cars in each section;
in the unloading process of the aeolian sand, timely watering the aeolian sand unloaded after the 2 nd layer;
the construction length is up to 500m, the construction length is filled once, the water content is easy to be large, the bulldozer and the waterwheel are immediately followed during filling, rough leveling and watering are carried out, then the smooth-wheel road roller and the tire type road roller are rolled, and a slab layer is formed on the surface.
3. Use of a tyred roller according to claim 1 in aeolian sand filling of a subgrade, characterised in that in step E: in the rough leveling process, water spraying and wetting are carried out simultaneously, the walking speed of a sprinkler is controlled to be 2km/h-3km/h, the water content of aeolian sand is controlled to be 9% -13%, the bottom layer filler is wetted by water before each layer of filler is paved, then paving and rolling are carried out, after a embankment body of the roadbed is filled and accepted, water is sprayed to keep the surface of the roadbed moist, waterproof geotextile is covered on the surface, water is supplied to an embankment side slope after the embankment side slope is brushed, a clay package slope of 20cm is covered, and finally the embankment side slope is pressed tightly and sealed by an excavator bucket.
4. Use of a tyred roller according to claim 1 for aeolian sand filling of a subgrade, characterised in that in step F: and in the rolling, when the aeolian sand is completely saturated after watering and no water mark exists on the surface layer, the smooth wheel mechanism of the smooth wheel vibratory roller is used, the traveling speed of the vibratory roller is 1.5km/h, wheel marks are overlapped during rolling, the width of the overlapped wheel marks is more than 1/3, and during rolling, the roller is subjected to static pressure for 1 time at first, then weak vibration for 2 times and finally strong vibration for 2 times.
5. Use of a tyred roller according to claim 1 in aeolian sand filling of a subgrade, characterised in that in step G: after the smooth wheel mechanism of the smooth wheel vibratory roller rolls, a tire mechanism of a tire type roller is adopted to roll from the outer side of the roadbed to the middle, the walking speed of the tire type roller is 2km/h, wheel tracks are overlapped during rolling, the width of the overlapped wheel tracks is more than 1/3, the rolling frequency is 3 times, the surface of the filler is hardened, and meanwhile, an obvious hard shell is formed.
6. Use of a tyred roller according to claim 1 for aeolian sand filling of a subgrade, characterised in that in said step H: after the smooth wheel mechanism of the smooth wheel vibratory roller rolls, the compaction degree of the road surface is greater than 96% by measuring 2 positions per compaction layer per 200m, and the deflection value is controlled to be less than 1.8mm by measuring 80-100 points per kilometer of the double lanes.
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| CN202110756370.8A CN113430886B (en) | 2021-07-05 | 2021-07-05 | Application of rubber-tyred road roller in building roadbed by aeolian sand |
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