The purpose of the first section drum
1, single-wheel vibratory roller
Single wheel vibratory roller has the characteristics of large static load, deep compaction influence and high working efficiency. Cohesionless soil can effectively compact sand, gravel, gravel, rockfill and other different types of roads, and is suitable for the compaction construction of earthwork foundations such as roads, airports, dikes, seaports and dams.
2. Double-wheel vibratory roller
The double-wheel vibratory roller is mainly suitable for the compaction of asphalt concrete, roller compacted concrete and other pavements, and can also be used for the compaction of subgrade, subbase and stable layer.
3, tire roller
Tire roller is a kind of compaction machine which uses special pneumatic tires to statically compact paving materials, and relies on the gravity of the machine itself to increase the compactness of working media. It is widely used in the compaction of various materials such as base, subbase, fill and asphalt surface. Especially in the compaction of asphalt pavement, its unique flexible compaction function is irreplaceable by other compaction equipment. It is the main machinery for recompression of asphalt mixture, and it is also an ideal compaction equipment for building high-grade highways, airports, ports, dams and industrial construction sites.
Section 2 Classification of Road Roller
Generally speaking, compaction machinery can be divided into roller and tamping machinery. According to the different working quality range, compaction principle and specific structure, the classification of road rollers is also different.
1, according to the working quality range
According to the different working quality, rollers can be divided into light, small, medium, heavy and super heavy, as shown in Table 2- 1.
Table 2- 1 Classification by Work Quality
Working quality of roller type (t)
area of application
Light ≤4.5 sidewalk compaction and black pavement repair, initial pressure of subgrade and pavement, intermediate compaction of medium-sized 5 ~ 8 subgrade and pavement and final pressure of simple pavement, final pressure of heavy-duty 10 ~ 14 macadam subgrade and asphalt concrete pavement, super heavy.
≥ 16
Backfilling of expressways, dams, airports and large foundations
2, according to the principle of compaction points
According to the different compaction principles, rollers can be divided into static, vibrating and impact types, as shown in Table 2-2. 3. According to the structure and functional form of the compacting wheel.
(1) According to the structural type of the compacting wheel, the roller can be divided into smooth wheel type, concave-convex type (sheep foot roller) type and tire type. (2) According to the combination type of compaction wheel, the roller can be divided into tire-smooth wheel combination, vibration-oscillation combination, etc. (3) According to the action form of the compacting wheel, vibratory roller can be divided into vibrating type, oscillating type and vertical vibrating type.
According to the compaction principle, the number of compaction wheels, operation mode, etc. ：
According to the compaction principle, according to the number and operation mode of compaction wheels, the categories are divided into small categories.
road roller
Static drum
flat-wheel roller
Two-wheel (static) roller Three-wheel (static) roller Tire roller
(self-propelled) tire roller trailer tire roller
vibratory roller
Tire-driven vibratory roller
Tire-driven (smooth wheel) vibratory roller Tire-driven concave-convex wheel vibratory roller series vibratory roller
Series single-wheel vibratory roller series double-wheel vibratory roller vibratory roller
Tire-driven vibratory roller series vibratory roller combination vibratory roller
Tire-wheel combined vibratory roller Vibration-oscillation combined vibratory roller Walking vibratory roller
(Single wheel) Walking vibratory roller Two wheel walking vibratory roller Traction vibratory roller Traction (smooth wheel) Vibratory roller Traction impact wheel vibratory roller Impact roller
Trilateral wheel impact roller
Three-sided impact roller Four-sided impact roller Four-sided impact roller Five-sided impact roller tamping machinery
Vibrating compactor
Vibrating plate compactor
One-way moving vibrating plate rammer two-way moving vibrating plate rammer vibration impact rammer motor vibration impact rammer internal combustion engine vibration impact rammer explosion rammer explosion rammer frog rammer
4. According to the operation driving mode.
According to the different driving modes, road rollers can be divided into self-propelled, walking and traction, as shown in Table 2-2. 5, according to the number of compaction wheel points
According to the number of compaction wheels, road rollers can be divided into two wheels, three wheels, single wheel vibration, two-wheel vibration and multi-wheel vibration.
6, according to the number of driving wheels
According to the number of driving wheels, road rollers can be divided into single wheel drive, double wheel drive and all wheel drive. 7, according to the type of transmission mechanism
According to the different types of transmission mechanism, roller can be divided into mechanical transmission, hydraulic mechanical transmission, hydraulic mechanical transmission and full hydraulic transmission. At present, the vibration system and steering system of roller generally adopt full hydraulic transmission technology, so when roller is classified according to transmission mechanism, it mainly refers to the driving type of walking system.
Explosive rammer
Road asphalt mixture compaction should be equipped with the following machinery:
Double-wheel steel roller: 6 ~ 8t
Three-wheel drum roller: 6 ~ 12t,12 ~15t;
Tire roller: 12 ~ 20t, 20 ~ 25t
Vibrating roller: 2 ~ 6t, 6 ~14t;
Hand-held small vibratory roller:1~ 2t;
Vibrating rammer plate: the mass shall not be less than 180kg, and the vibration frequency shall not be less than 3000 times/minute.
According to the axle arrangement, there are single-axle single-wheel, double-axle double-wheel, double-axle three-wheel and three-axle three-wheel and so on. It is powered by internal combustion engine and adopts mechanical transmission or hydraulic transmission. General front wheel steering, good maneuverability, rear wheel drive. In order to improve steering and rolling performance, articulated steering structure and all-wheel drive should be adopted. The front wheel frame is hinged with the frame to reduce the swing of the fuselage when the road surface is uneven. The rear wheel is rigidly connected with the frame. Hydraulic control is adopted, and steering is controlled by hydraulic cylinder. Scrapers are installed on the front and rear grinding wheels to remove the adhesive on the grinding wheels. It is also equipped with a water spraying system, which is used to spray water on the roller when compacting the asphalt pavement to prevent the asphalt mixture from sticking. In order to increase the acting force, iron, sand, water, etc. Can be added to the grinding wheel to increase the weight.
The main technical parameters of steel wheel roller are machine weight and linear pressure. In 1980s, the weight range of various steel roller was about 2 ~ 13 tons for two-wheel roller, 0 ~15 tons for three-wheel roller, 0 ~/3 tons for pressure roller and 0 ~/3 tons for three-axle three-wheel roller.
The grinding wheel adopts pneumatic tires, generally 3 ~ 5 front wheels and 4 ~ 6 rear wheels. If inflationary pressure changes, it can change.
Tire roller
Grounding pressure, the pressure adjustment range is 0. 1 ~ 0. 1.05 MPa. Tire roller adopts hydraulic, hydraulic or mechanical transmission system, driven by single shaft or full shaft, and supported by three-point wide base tire articulated frame structure. The compaction process has the function of kneading, so that the particles in the compacted layer are embedded without damage and uniform and dense. Good mobility, high speed (up to 25 km/h), used for the compaction of road, airport and other engineering cushions.
The towed vibratory roller can effectively compact all kinds of earth-rock fillers, which is suitable for the construction of modern highways, airports, embankment fills, seaports, dams, railways, mines and other projects.
A roller is equipped with many convex rollers. Because the bump is shaped like a sheep's foot, it is called a sheep's foot mill, also known as a sheep's foot mill. The shapes of bumps are sheep's feet, cylinders and square columns. The roller shaft is supported on the bearing of the traction frame, which expands the application range. The roller can be filled with water, sand or iron sand to increase the rolling weight. Comb scrapers are installed under the racks at the front and rear of the drum, and are used to remove the silt between the protrusions.
The towed sheep hoof mill is towed by a tractor. Self-propelled sheep foot mill is also called tamping roller. The unit pressure of sheep hoof mill is large, which makes the filler uniform, has tamping effect and high compaction degree, especially for hard clay, and is suitable for compacting cohesive soil and gravel layer. Especially for hard clay, the bump has the functions of stirring, kneading and tamping, and has the function of tamping, so that the filler is uniform, and the upper and lower layers are well bonded to avoid delamination. Widely used in the compaction of subgrade, cushion and dam.
The self-propelled sheep's foot roller can also be equipped with an excitation device in the roller to make a vibrating tamping roller. The exciting force can enhance the compaction effect, and the roller can be filled with water, sand or iron sand to increase the rolling weight. Expand the scope of use.
The main technical parameters of sheep hoof grinder are machine weight and unit pressure. Because the bump looks like a sheep's foot, it is called a sheep's foot mill.
1. Compaction of foundations of roads, railways, dams, airports, buildings, factories and houses.
2. Compaction of bulk materials such as waste, ash and coal in cement plant.
3. Compaction of earthwork with wide water content.
4. Compaction of rock, clay and expansive soil.
5. Flame-retardant compaction of open-pit coal seam.