JP2008050859A - Vibration controller for vibration roller and compaction construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration controller for a vibration roller that enables the uniform compaction of a road surface, and a compaction construction method. <P>SOLUTION: A memory unit 45 samples a signal S1 and a signal S2 to generate combination data, and stores the generated combination data. A calculating unit 46 calculates the combination data stored in the memory unit 45 and the current signals S1 and S3 as input signals, and calculates data to output them to a control signal generating means 47 so that a given amplitude corresponding to data D2 from a second input unit stored in combination is added to the vibration roller at its position in data D1 from a first input unit stored in the memory unit 45. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is applied to a vibration roller used for compaction construction of ground, asphalt road surfaces, and the like, and relates to a vibration control device for controlling vibration of a roll and a compaction method for the vibration roller.

  When compacting ground and asphalt road surfaces, it is particularly important to achieve the specified compaction degree (consolidation density) and evenly compact the entire construction surface so that the compaction degree does not vary. It is. In the case of compaction construction in which the same construction lane is repeatedly compacted a plurality of times using a compaction vehicle such as a rolling roller, an example of the management of the compaction degree is a method of managing the number of compaction vehicle runs. Can be mentioned. This is because the data on how many times the compaction vehicle is reciprocated to reach the specified compaction degree is measured in advance for each road surface material (soil, asphalt, etc.), and the number of travels previously determined on the road surface to be constructed This is based on the idea of controlling the degree of compaction in an indirect manner by managing whether the rolling is performed. However, this management method is effective when the quality of the road surface material of the entire construction lane is uniform, but for example, the quality of the road surface material and the thickness of the rolling change in the middle, or the ratio of water contained is different. In such a case, there may be a problem that a specified degree of compaction cannot be obtained depending on the location even if the rolling is performed at a specified number of times.

  In response to this problem, when the compaction vehicle is a so-called vibration roller type that compacts the road surface while vibrating the roll, the vertical acceleration of the roll generated when the roll strikes the ground is detected, and this acceleration is detected. A method of managing the degree of compaction with the above condition has been proposed. This is made by paying attention to the fact that the degree of compaction of the road surface and the reaction force applied to the roll by the road surface (hereinafter referred to as the road surface reaction force) are correlated, and the road surface reaction force is calculated from the acceleration. Can be sought. According to this method, the road surface can be managed regardless of changes in the road surface material and the like, so that the management accuracy is improved as compared with the management based on the number of traveling times.

Further, Patent Document 1 describes a technique for reducing the vertical component of roll vibration according to the detected acceleration value when the vibration roller is of a type having a variable amplitude vibration mechanism capable of changing the amplitude of the roll. ing.
JP-A-8-105011

  The technique described in Patent Document 1 seems to be superior in terms of uniform compaction of the construction surface because the vertical component of roll vibration is lowered as the road surface is compacted. However, although this technique seems to be effective when the vehicle is stopped, in the compacting construction while the actual vehicle is running, there arises a problem of deviation due to the movement of the vehicle. In other words, when the variable amplitude vibration mechanism is immediately activated based on the acceleration data detected at a certain point, the acceleration data is actually reflected by the time lag of the calculation time of the data and the operation time of the variable amplitude vibration mechanism. It is the point where the vehicle has already moved.

  The present invention was devised to solve such a problem. When a road surface is compacted with a vibration roller having a variable amplitude vibration mechanism, a predetermined compaction degree is achieved, and uniform compaction is achieved. It is an object of the present invention to provide a vibration control device and a compacting method for a vibration roller that can be used.

  In order to solve the above-mentioned problems, the present invention is a vibration control device for a vibration roller provided with a variable amplitude vibration mechanism capable of adjusting the amplitude of a vertical component of a roll, and detects a road surface position of the vibration roller to generate a signal S1. A first input device provided as a signal, a second vibration response characteristic of roll vibration with respect to the road surface, or a second input device provided as a signal S2 by detecting the amount of roll subsidence with respect to the road surface, and detecting the traveling speed of the vibration roller The third input device provided as the signal S3, the signal S1, and the signal S2 corresponding to the signal S1 are sampled into combination data, a storage device for storing the combined data, and a control signal to the variable amplitude oscillation mechanism. The control signal generating means for outputting, the combination data stored in the storage device, the current signal S1 and the signal S3 are calculated as input signals, and the storage device The control signal generating means is applied so that a predetermined amplitude corresponding to the data D2 from the second input device stored in combination is added at the position of the vibration roller in the data D1 from the stored first input device. And a vibration control device for a vibration roller, comprising: a calculation device that calculates and outputs data.

  In the technique of the above-mentioned Patent Document 1, a problem of a shift in distance occurs due to the movement of the vehicle. On the other hand, if the vibration control device of the present invention is applied, the degree of compaction information is temporarily stored during past driving. At the time of subsequent driving, the amplitude is controlled mainly in anticipation of the time lag of the operation time of the variable amplitude vibration mechanism based on the stored compaction degree information, so that the compaction degree information at a certain point remains the same. It will be compacted as reflected in the location. Thereby, the whole construction surface can be compacted accurately and uniformly.

  The present invention further includes a fourth input device that provides a signal S4 in the amplitude designation state of the variable amplitude vibration mechanism, and the arithmetic device includes the combination data stored in the storage device and the current signal S1. In addition, when the signal S3 is calculated as an input signal, the vibration control device of the vibration roller is characterized in that the calculation is performed in consideration of the current signal S4.

  According to this vibration control device, it is possible to compact the road surface by accurately reflecting the degree-of-consolidation degree information at a certain point to the same point by calculating the signal S4 in the current amplitude designation state. .

  Further, in the present invention, when the data D2 stored in the storage means is a value indicating that the degree of road compaction is lower than a predetermined value, the roll amplitude is increased and the degree of road compaction is increased. When the value is higher than a predetermined value, the variable amplitude vibration mechanism is controlled so as to reduce the amplitude of the roll.

  According to this vibration control device, the entire construction surface can be more uniformly compacted for each number of times of travel, so that the uniformity of the compaction degree at the end of construction is further improved.

  Further, in the present invention, the arithmetic unit has a compaction degree index data generating means for generating road surface compaction degree index data based on the signal S2, and the compaction degree index data or the compaction degree index data is generated. The vibration roller vibration control device is characterized in that the comparison result between the degree index data and a preset reference value is the data D2, and is stored in the storage device in combination with the data D1.

  By setting the compaction degree index data or the comparison result between the compactness degree index data and a preset reference value as data D2, the processing program in the arithmetic device is simplified, and an economical vibration control device can be constructed.

  In the present invention, the second input device includes an acceleration sensor that detects an acceleration of a vertical component of the roll, and the compactness index data is obtained based on the acceleration detected by the acceleration sensor. The vibration control device of the vibration roller is characterized in that the value of the road surface reaction force to be included is included as a variable.

  It has been confirmed by tests that the road surface reaction force has a correlation with the degree of road surface compaction (mainly a value indicating the ratio between the reference density and the current position density as a percentage). Therefore, by using the compaction degree index data as data including the value of the road surface reaction force as a variable, the degree of compaction of the road surface can be grasped and the degree of compaction can be more uniformly compacted.

  Further, in the present invention, a vibration roller having a variable amplitude vibration mechanism capable of adjusting the amplitude of the vertical component of the roll is used, and the vibration roller for repeatedly driving the vibration roller in the same construction lane to compact the road surface. This is a compacting method. (A) In a certain number of times of travel, the road surface position of the vibration roller is detected to obtain data D1, and the response characteristic of roll vibration to the road surface or the amount of roll subsidence to the road surface is detected. In the process of obtaining the data D2 and storing both data D1 and D2 as combined data, (B) the road surface position of the vibration roller and the traveling speed of the vibration roller are detected in at least one of the number of travels after Then, the detection result and the combination data stored in the step (A) are calculated, and from the calculation result, the step (A) And a step of controlling the variable amplitude vibration mechanism so that a predetermined amplitude corresponding to the data D2 stored in combination is applied at the position of the vibration roller in the stored data D1. The hardened construction method.

  In the technique of the above-mentioned Patent Document 1, a problem of a deviation in distance occurs due to the movement of the vehicle, whereas in the compaction construction method of the present invention, the degree of compaction information is temporarily stored during past travel, At the time of subsequent driving, the amplitude is controlled mainly in anticipation of the time lag of the operation time of the variable amplitude vibration mechanism based on the stored compaction degree information. It will be reflected and compacted. Thereby, it becomes possible to compact the whole construction surface accurately and uniformly.

  In the present invention, in the step (B), the current detection results of the road surface position of the vibration roller and the traveling speed of the vibration roller and the combination data stored in the step (A) are calculated. The vibration roller compacting method is characterized in that the calculation is performed in consideration of the signal S4 in the amplitude designation state of the variable amplitude vibration mechanism.

  According to this compaction construction method, by calculating the signal S4 in the current amplitude designation state, it is possible to accurately compact the road surface by accurately reflecting the compaction degree information of a certain point to the same point. Become.

  In the present invention, in the step (B), when the data D2 stored in the step (A) is a value indicating that the degree of road compaction is lower than a predetermined value, a roll is used. The vibration roller is characterized in that the variable amplitude vibration mechanism is controlled so as to reduce the amplitude of the roll when the amplitude of the roller is increased and the degree of compaction of the road surface is a value indicating that it is higher than a predetermined value. The compacting method was used.

  According to this compaction construction method, the entire construction surface can be compacted more uniformly for each number of times of travel, so that the uniformity of the compaction degree at the end of construction is further improved.

  Further, in the present invention, the data D2 is road surface compaction index data or a comparison result between the compaction index data and a preset reference value. It was a method.

  By setting the compaction degree index data or the comparison result between the compaction degree index data and a preset reference value as data D2, the processing program in the arithmetic unit or the like is simplified.

  In the present invention, the defect rate of the data D2 stored in the step (A ′) (A) is lower than the reference rate between the step (A) and the step (B). In this case, the vibration roller includes a step of vibrating the roll with a constant amplitude without controlling the variable amplitude vibration mechanism, and a step of performing the step (B) when higher than a reference rate. The compacting method was used.

  According to this compaction construction method, it is possible to prevent road surface disturbance due to excessive amplitude control. Here, the road surface disturbance means surface irregularities, cracks, and the like. Further, for example, by providing a selection switch for determining whether or not to include the step (A ′), a numerical value change switch for the reference rate, and the like as the apparatus, the construction manager can easily cope with the situation on the construction road surface.

  In the present invention, the vibration roller compacting method is characterized in that, in the step (B), the variable amplitude vibration mechanism is always controlled based on the latest data D2.

  According to this compaction construction method, the latest degree of compaction of the road surface can be grasped, and the degree of compaction can be made uniform with high accuracy.

In the present invention, when the road surface is compacted by running the vibration roller for the specified number of times “N _pass ” in the same construction lane, “N _pass −i” (where i is from 1 to (N _pass −1)). The method of (A) is applied while the roll is vibrated at a constant amplitude without controlling the variable-amplitude vibration mechanism at the number of times of traveling). It was.

  This compacting method is an effective method for increasing the degree of compaction of the road surface. In the first half, for example, the maximum degree of compaction of the road surface can be increased as a whole by always applying the maximum amplitude. Further, by controlling the variable amplitude vibration mechanism in the latter half, the energy required for compaction can be suppressed and the compaction degree can be made uniform.

  In the present invention, the first vibration roller made of an iron wheel roller is repeatedly run on the same construction lane made of asphalt road surface to compact the road surface, and the amplitude of the vertical component of the tire is increased. The second vibration roller composed of a tire roller having an adjustable variable amplitude vibration mechanism is repeatedly driven in the same construction lane to compact the road surface, and the third vibration composed of an iron wheel roller. This is a vibration roller compaction construction method in which a roller is repeatedly run in the same construction lane to compact a road surface. (C) In primary compaction construction, The roll is vibrated at a constant amplitude, and the data D1 is obtained by detecting the road surface position of the first vibrating roller at the final number of times of travel. Detecting the response characteristics of roll vibration with respect to the road surface or the amount of subsidence of the roll with respect to the road surface to obtain data D2, and storing both data D1 and D2 as combined data; (D) transmission mounted on the first vibration roller A step of wirelessly transmitting information on the data D1 and D2 from the machine to a receiver mounted on the second vibratory roller, and (E) a second vibratory roller in at least one run of the secondary compaction work The road surface position and the traveling speed are detected, the detection result and the combination data stored in the step (C) are calculated, and the first result in the data D1 stored in the step (C) is calculated from the calculation result. A step of controlling the variable amplitude vibration mechanism so that a predetermined amplitude corresponding to the data D2 stored in combination is applied at the road surface position of the vibration roller; In the construction, the roll is vibrated with a constant amplitude over the entire travel, and the road surface position of the third vibration roller is detected and the data D1 is obtained at the final number of travels, and the response characteristic of the roll vibration to the road surface, or Detecting the amount of roll subsidence with respect to the road surface to obtain data D2, storing both data D1 and D2 as combined data, and (G) storing the combined data stored in the step (F) in a recording medium The vibration roller compaction construction method is characterized by including

  The present invention uses a plurality of vibrating rollers in order to increase construction efficiency. In this construction method of compacting the asphalt road surface in the order of iron wheel roller → tire roller → iron wheel roller, the time lag of the operation time of the variable amplitude vibration mechanism is mainly based on the stored compaction degree information in the compaction work by the tire roller. As the amplitude is controlled in advance, the compaction work is performed by directly reflecting the degree of compaction information at a certain point to the same point, and there is no problem of distance shift. Thereby, it becomes possible to compact the whole construction surface accurately and uniformly.

  According to the present invention, the entire construction surface can be accurately and uniformly compacted.

  First, an example of a vibrating roller to which the present invention is applied will be described. FIG. 1 is an explanatory side view of a vibrating roller of a type having an iron roll, FIG. 2 is an explanatory plan view of a variable amplitude vibration mechanism built in each roll, and FIG. It is. Note that the variable amplitude vibration mechanism itself described below is publicly known, and is described in, for example, Japanese Patent Laid-Open No. 7-166511.

  In FIG. 1, the vibration roller R is composed of a front vehicle body 1A and a rear vehicle body 1B connected in an articulated manner, and a roll 2 made of an iron wheel is supported on each vehicle body. The vibration roller R mainly compacts the soil ground, asphalt road surface, etc. by repeatedly moving forward and backward in the same construction lane at a relatively low speed. In FIG. 2, the roll 2 has a hollow cylindrical shape, and the disc-shaped first end plate 3 and second end plate 4 each having a through hole 3a, 4a formed in the center on the inner peripheral surface thereof are separated from each other. It is fixed. A hollow cylindrical exciter case 5 is fixed between the first end plate 3 and the second end plate 4 so as to be sandwiched between the peripheries of the through hole 3a and the through hole 4a. The first end plate 3 is attached with an output portion 6a of the traveling motor 6 so as to close one end of the vibrator case 5, and the second end plate 4 is closed so as to close the other end of the shaker case 5. An axle shaft 7 is attached. The fixed portion 6b of the traveling motor 6 is fixed to a mounting plate 9 that is attached to the front vehicle body 1A (or the rear vehicle body 1B) via an anti-vibration rubber 8. The axle shaft 7 is pivotally supported via a bearing 11 on a mounting plate 10 which is attached to the front vehicle body 1A (or rear vehicle body 1B) side via a vibration isolating rubber 8. As described above, when the output portion 6a of the traveling motor 6 rotates, the axle 2 is configured to be rotatable with respect to the mounting plate 10 by the bearing 11, so that the roll 2 travels and rotates.

  Next, the variable amplitude vibration mechanism 12 that can adjust the amplitude of the roll 2 will be described. In the present embodiment, the position of the movable eccentric weight 17 provided on the excitation shaft 13 is changed by an actuator (hydraulic cylinder 26), thereby adjusting the eccentric amount of the excitation shaft 13 and changing the amplitude. The excitation shaft 13 includes a pair of plate-like support frames 14 disposed so as to be opposed to each other, a pair of support members 15 that connect both ends of the pair of support frames 14, and a pair of support frames 14. A pivot 16 fixed around each central portion of the shaft, a movable eccentric weight 17 having a substantially half-moon shape rotatably attached around the pivot 16, a cylindrical guide member 18, and a columnar support shaft member 19 A through hole 15a is formed at the center of each support member 15 as shown in FIG. 3, and a guide member 18 is fixed to the outer surface of one support member 15 so as to fit into the through hole 15a. A support shaft member 19 is similarly fixed to the outer surface of the other support member 15 so as to be fitted into the through hole 15a. In FIG. 2, the excitation shaft 13 includes a guide plate 18 pivotally supported on the axle shaft 7 via a bearing 20, and a support shaft member 19 provided in the vibration generator case 5 via a bearing 21. 22 is pivotally supported.

  One end of a cylindrical shaft 23 is splined to one end side of the guide member 18. A gear 24 is attached to the other end of the shaft 23. A hydraulic cylinder 26 is mounted on the mounting plate 10 via a support bracket (not shown). The rod 26 a penetrates the shaft 23, and the tip of the rod 26 a is located inside the guide member 18. One end of a connecting rod 28 is connected to the tip of the rod 26 a via a bearing 27, and the other end of the connecting rod 28 is connected to the movable eccentric weight 17. Thereby, the displacement of the linear movement of the rod 26 a is converted into the displacement of the rotational movement around the pivot 16 of the movable eccentric weight 17 via the connecting rod 28.

  A vibration motor 30 is attached to the mounting plate 10 via a support bracket (not shown), and a gear 31 attached to the output shaft is engaged with the gear 24 of the shaft 23. As described above, when the vibration motor 30 is driven, the shaft 23 rotates through the gears 31, 24, and the roll 2 vibrates by rotating the excitation shaft 13 through the guide member 18 splined to the shaft 23. To do.

  As is clear from the above description, the hydraulic cylinder 26, the connecting rod 28, and the excitation shaft 13 having the movable eccentric weight 17 constitute the variable amplitude vibration mechanism 12. The state of FIG. 3A shows a state in which the rotational angle of the movable eccentric weight 17 is zero and the eccentric amount of the excitation shaft 13 is zero, and vibration force is generated even if the excitation shaft 13 is rotated in this state. do not do. Therefore, the amplitude is zero. The state of FIG. 3B is a state in which the movable eccentric weight 17 is rotated to the maximum rotation angle, that is, a state where the eccentric amount of the excitation shaft 13 is maximized, and the maximum amplitude is obtained. As described above, in FIG. 2, the rod 26a of the hydraulic cylinder 26 is held at an appropriate position, so that the movable eccentric weight 17 is held at an appropriate rotation angle within a range from zero to the maximum rotation angle. The amplitude corresponding to the rotation angle (the amplitude of the vertical component of the roll 2) is obtained.

  In the present embodiment, the intermediate rotational position of the movable eccentric weight 17 is set at five positions including the maximum rotational position of FIG. That is, the amplitude is set in five stages. Here, suppose that the five positions (the number of eccentric steps) of the movable eccentric weight 17 are named first, second, third, fourth, fifth from the state closest to the state of FIG. That is, as the number of steps increases, the total amount of eccentricity of the movable eccentric weight 17 with respect to the excitation shaft 13 increases, and if the excitation shaft 13 rotates, the amplitude increases as the number of eccentric steps increases. Although depending on the mechanism, in the case of the variable amplitude vibration mechanism 12 shown in FIG. 3, the time required to change the degree of eccentricity per unit stage difference is substantially constant. Therefore, when the degree of change of the eccentric position of the movable eccentric weight 17 is large, the time required for the change is increased accordingly. For example, when the time required for the eccentric step number to increase from one step to two steps is about 0.1 seconds, the time required for the eccentric step number to increase from one step to three steps is about 0.2 seconds, and the eccentric step number is The time required to go up from the first stage to the fourth stage is about 0.3 seconds.

  Next, the vibration control device according to the present invention will be described. FIG. 4 is a block diagram showing the configuration of the vibration control device. The vibration control device 41 detects the road surface position of the vibration roller R and provides it as a signal S1, the response characteristic of roll vibration with respect to the road surface, or the amount of settlement of the roll 2 with respect to the road surface. A second input device (roll state detection means 43) that detects and provides the signal as a signal S2, and a third input device (vehicle speed detection means 44) that detects the travel speed of the vibration roller R and provides it as the signal S3. The signal S1 and the signal S2 corresponding to the signal S1 are sampled into combination data, the storage device 45 for storing the data, the control signal generating means 47 for outputting the control signal to the variable amplitude vibration mechanism 12, and the storage The combination data stored in the device 45 and the current signal S1 and the signal S3 are calculated as input signals, and from the first input device stored in the storage device 45 An arithmetic unit 46 for calculating and outputting data to the control signal generating means 47 so that a predetermined amplitude corresponding to the data D2 from the second input device stored in combination is added at the position of the vibration roller in the data D1; Is provided.

  In the present embodiment, the vibration control device 41 further includes a fourth input device 48 that provides an amplitude designation state signal S4 of the variable amplitude vibration mechanism 12, and the arithmetic device 46 is a combination data stored in the storage device 45. In calculating the current signal S1 and the signal S3 as input signals, the current signal S4 is also taken into consideration.

  Hereinafter, when the data D2 stored in the storage device 45 is a value indicating that the degree of road surface compaction is lower than a predetermined value, the amplitude of the roll 2 (FIG. 1) is increased, and the road surface compaction is performed. A mode in which the variable amplitude vibration mechanism 12 is controlled to reduce the amplitude of the roll 2 (FIG. 1) when the degree is a value indicating that the degree is higher than a predetermined value will be described.

  Further, in the present embodiment, the arithmetic unit 46 includes the compaction degree index data generating means 49 that generates road surface compaction degree index data based on the signal S2, and the compaction degree index data or the compaction degree index data. A comparison result between the degree index data and a reference value set in advance will be described as data D2, and this data D2 will be stored in the storage device 45 in combination with the data D1.

"First input device (position detecting means 42)"
Specific examples of the position detection means 42 include the following three methods.
(1) “GPS (Global Positioning System) system”
A GPS receiver is mounted on the vibration roller, and the position of the vibration roller is specified by receiving radio waves transmitted from a plurality of satellites.
(2) "(Vehicle speed sensor + gyro) system"
The gyro is an angular velocity sensor for detecting a rotation angle in a direction in which the vibration roller travels, and an optical fiber gyro or the like is used. The vehicle speed sensor detects the traveling speed of the vibration roller, and for example, vehicle speed detection means 44 can be used. The position of the vibration roller is specified by the angular velocity output by the gyro and the vehicle speed output by the vehicle speed sensor.
(3) "(Vehicle speed sensor + operator operation) method"
In this method, for example, when the operator of the vibration roller presses the operation switch at the starting point of the construction lane, the vibration is detected by referring to the vehicle speed data output from the vehicle speed sensor (for example, the vehicle speed detecting means 44) from the time of the pressing. The position of the roller from the starting point is specified. In this method, manual operation of operating the operation switch at the same place is necessary for repeatedly compacting the same construction lane, but it is advantageous in terms of both position accuracy and economy.

"Second input device (roll state detection means 43)"
(1) "When detecting response characteristics of roll vibration to the road surface"
It is known that the road surface reaction force increases as the road surface compaction density increases. Therefore, if the response characteristic of the roll vibration having a correlation with the road surface reaction force is detected, the degree of compaction of the road surface can be grasped quantitatively. The “road surface” as used in the present invention is a general term including not only road surfaces such as asphalt pavement but also soil ground.

  The response characteristics of roll vibration to the road surface include acceleration of the vertical component of the roll. Regarding the acceleration sensor for detecting the acceleration, for example, in Patent Document 1, one is provided on the so-called unsprung mass side, but in order to obtain a highly accurate value of the road surface reaction force, the acceleration is also applied to the unsprung mass side. It is desirable to provide a sensor and reflect it in the formula for obtaining the road surface reaction force described later. As a specific example of attachment, an acceleration sensor 32A is attached to the attachment plate 10 as the unsprung mass side with the anti-vibration rubber 8 interposed therebetween as shown in FIG. 2, and the acceleration sensor is attached to the front vehicle body 1A as the unsprung mass side. Attach 32B.

(2) “When detecting the amount of roll subsidence on the road surface”
As a method of grasping the degree of compaction of the road surface, a method of detecting the amount of roll subsidence with respect to the road surface is known. For example, in Japanese Patent Publication No. 5-3486, the height from the road surface is set on the vehicle body part before and after the roll. A technique is described in which a distance measuring device for detecting is provided. According to this, the amount of roll subsidence is derived from the height difference of the vehicle body part before and after the roll, and the degree of compaction of the road surface can be known from the value of the amount of subsidence of the roll. In Japanese Patent Publication No. 5-3486, three distance measuring devices are provided in order to correct the inclination of the vehicle body. However, if an inclination sensor capable of detecting the inclination of the vehicle body is provided, the distance measuring device is Two is enough. FIG. 5 shows an example of the attachment. Ultrasonic sensors 33A and 33B as distance measuring devices are attached to a portion of the front vehicle body 1A sandwiching the roll 2 back and forth, and an inclination sensor 34 is attached to the front vehicle body 1A.

"Third input device (vehicle speed detection means 44)"
As the vehicle speed detection means 44, a known vehicle speed sensor such as an optical type or a magnetic type that obtains the vehicle speed by detecting the number of rotations of the roll can be applied.

"Fourth input device 48"
When the driving time of the variable amplitude vibration mechanism 12 varies depending on the difference in the number of eccentric steps of the movable eccentric weight 17 as in the present embodiment, the fourth input for providing the signal S4 of the amplitude designation state of the variable amplitude vibration mechanism 12 It is assumed that a device 48 is provided. This signal S4 will be described later.

“Consolidation index data generation means 49”
As described above, the arithmetic unit 46 includes the compaction degree index data generating means 49 that generates road surface compaction degree index data based on the signal S2. The compactness index data is calculated based on a predetermined arithmetic expression based on roll vibration response characteristic data with respect to the road surface output from the roll state detection means 43 or roll subsidence amount data with respect to the road surface. This is expressed as a numerical value.

  In order to obtain the degree of compaction index data, the present inventors pp. 429 to 434 of “elasticity” (author: SP Tymoshenko, JN Goodia Corona, Inc., issued February 28, 1973). The expression (1) relating to the pressure between two contacting objects described on the page was focused. This formula (1) shows the relationship between the width of the contact surface and the load when two solid cylindrical elastic bodies are in contact.

Based on the formula (1), the present inventors have derived a relational expression between the width of the contact surface and the load in a state where the vibrating roll compacts the road surface material. First, the term of the subscript 1 in the formula (1) is a road surface material, and the term of the subscript 2 is a vibrating roll. Further, while the expression (1) is intended for a solid cylindrical elastic body, the vibration roll is a hollow cylindrical elastic body, but the rigidity of the road surface material is much smaller than that of the vibration roll (iron). Is assumed to be a solid cylindrical elastic body. Here, in the road surface material, since R ₁ → ∞, when this condition is put into the formula (1), the formula (2) is obtained.

  Furthermore, in order to obtain an equation for obtaining the elastic coefficient of the road surface material, the equation (1-a) is substituted into the equation (2) and transformed to obtain the equation (3).

The E ₂ in the formula (3), for clarity in the following, referred to as the elastic modulus E _SA as road stiffness of the road surface material. The value of b in Equation (3) is obtained as follows. FIG. 6 shows a state in which either the front roll 2 or the rear roll 2 shown in FIG. 1 is moved downward by one amplitude. As can be seen from FIG. 6, b and amplitude (single amplitude) a are in the relationship of Expression (4).

  That is, b is obtained by measuring the actual amplitude a of the roll, and this is put into the equation (3). The amplitude a is measured, for example, by attaching a measuring instrument (for example, a laser displacement meter) capable of measuring the vertical displacement of the roll to the front vehicle body 1A (or the rear vehicle body 1B). Further, instead of directly measuring the amplitude a, in some cases, the amplitude a may be obtained by integrating the acceleration in the vertical direction obtained by the acceleration sensor 32A shown in FIG. 2 twice.

は省略することができる。 P'in the formula (3) is a peak value R _SA of one cycle of the road surface reaction force R (t), a value obtained by dividing the rolling pressure width (roll width). The road surface reaction force R (t) is obtained as follows. FIG. 7 is a view showing the vibration behavior of the roll of either the front roll 2 or the rear roll 2 shown in FIG. 1 as a two-degree-of-freedom vibration model. Spring with the road surface as a spring with a damping coefficient of K _s becomes spring constant and C _s becomes road of the road surface acting in the vertical direction, the sprung mass is K _f becomes spring constant and C _f acts in the vertical direction damping coefficient Is modeled as Formula (5) is obtained by creating an equation of motion based on this vibration model and organizing the formula to obtain the road surface reaction force R (t). If the acceleration on the unsprung mass side is very small compared to the acceleration on the unsprung mass side, the equation (5)

Can be omitted.

In order to detect the angular velocity ω of the excitation shaft (vibration shaft 13 in FIG. 2) and its phase, that is, the product ωt of the angular velocity and the elapsed time from the position where the eccentric weight has come directly below, A proximity switch that detects the eccentric weight of the shaft, a rotary encoder, or the like is appropriately attached. In FIG. 2, a sensor for detecting the angular velocity of the excitation shaft 13 is not shown. The sensor that detects the angular velocity ω is synonymous with the sensor that detects the frequency n. This is because the relationship is “n = ω / (2π)”. The acceleration on the unsprung mass side and the acceleration on the unsprung mass side are detected by the acceleration sensors 32A and 32B shown in FIG. The excitation force F is obtained by “F = mrω ² ”. m is the eccentric mass, r is the distance between the axis of the excitation shaft and the center of gravity of the eccentric weight, and ω is the angular velocity of the excitation shaft. In R (t) determined from the above, the peak value R _SA, rolling divided by the P'by pressure width, which are placed in the formula (3). Thus, in the present invention, the road surface even when using the peak value R _SA of the reaction force R (t), "degree of compaction index data, road surface is obtained based on the acceleration detected by the acceleration sensor It satisfies the requirement that the value of reaction force is included as a variable.

The elastic modulus _Esa obtained from the above has a good correlation with the degree of road compaction as shown in FIG. FIG. 8 is a graph showing the relationship between the elastic modulus _Esa during construction and the degree of compaction measured after the asphalt road surface material is cooled and solidified based on the test data conducted by the present inventors on a certain asphalt road surface material. It has become. The degree of compaction in this graph indicates the ratio when the prescribed compaction density value is 100, and the unit is%. The output cycle of the modulus of elasticity E _sa is, for example, the period of one rotation of the vibration generating shaft. Further, when the road surface is an asphalt road surface, the compactness index data may be obtained by adding a factor of a coefficient related to the road surface temperature obtained in advance by a test or the like to the elastic coefficient _Esa .

"Storage device 45"
As described above, the storage device 45 is provided from the signal S1 provided from the first input device (position detection means 42) and from the second input device (roll state detection means 43) corresponding to the signal S1. The signal S2 to be sampled is sampled into combination data and stored. That is, data D2 (consolidation degree index data or a comparison result between the compaction degree index data and preset reference data) generated based on the signal S2 is used as data D1 (position data) generated based on the signal S1. ) And memorize it. FIG. 9 is a diagram in which the stored data D1 and D2 are mapped in accordance with the construction lane. FIG. 9A shows a case where the data D2 composed of the compactness index data is associated with the data D1, and FIG. The case where the data D2 and data D1 which consist of results are linked | related is shown. When the data D1 is denoted by P1, P2,..., P9 from the left end of the construction lane in the figure, for example, (a) shows 205 degree-of-consolidation index data (elastic coefficient E _sa ) at the position data P1, P2, respectively. The compaction degree index data in the position data P3 is 195, and the compaction degree index data in the position data P4 is 185. That is, the degree of compaction of the road surface near the left end of the construction lane corresponding to the position data P1 and P2 is large, the degree of compaction of the road surface corresponding to the position data P3 is smaller than that, and the road surface corresponding to the position data P4 is compacted. This means that the degree of consolidation is even smaller.

  In the case of FIG. 9B, for example, as shown in FIG. 4, the compaction degree index data generated by the compaction degree index data generating means 49 is compared with the reference data by the arithmetic unit 46, and the comparison result is obtained as data. It is stored in the storage device 45 in association with D1. The reference data is set, for example, as data having a predetermined numerical width having an upper threshold and a lower threshold, and is stored in advance in a memory or the like. In FIG. 9B, if the value of the reference data is set to 190 to 200 and the compaction degree index data is within the range of the reference data, it is marked with ◯, and when it is larger than the upper threshold 200. When the mark is less than 190, the comparison result is shown in three stages. Of course, the comparison result may be divided into stages larger than three stages. In some cases, the comparison result may be divided into two stages with one threshold as a boundary.

  The position data P1, P2,... Are preferably processed as data obtained by dividing the construction lane into equal intervals, for example, a section of 50 cm. In this case, the compactness index data or the comparison result corresponding to one section is also processed as one data by averaging values such as sampled acceleration.

"Calculation device 46, control signal generation means 47"
When the vibration roller R (FIG. 1) travels again on the same construction lane, in FIG. 4, the calculation device 46 displays the combination data (data D1 and D2) stored in the storage device 45 and the current first input. The signal S1 provided from the device (position detecting means 42) and the signal S3 provided from the third input device (vehicle speed detecting means 44) are calculated as input signals. Then, the data is calculated and output to the control signal generating means 47 so that a predetermined amplitude corresponding to the data D2 stored in combination is added at the position of the vibration roller in the data D1 stored in the storage device 45. The control signal generating means 47 outputs a control signal to the variable amplitude vibration mechanism 12 (hydraulic cylinder 26) based on this data. The control signal generating means 47 is composed of, for example, a D / A converter.

  As an example of “so that a predetermined amplitude is applied”, in this embodiment, as described above, the calculation device 46 has the data D2 stored in the storage device 45 that the degree of compaction of the road surface is lower than a predetermined value. Variable amplitude vibration mechanism so that the amplitude of the roll 2 is increased, and when the road surface is more than a predetermined value, the amplitude of the roll 2 is decreased. 12 is controlled. Specifically, the expansion / contraction amount of the rod 26a of the hydraulic cylinder 26 shown in FIG. 2 is controlled. In the arithmetic unit 46, “increase the amplitude” and “decrease the amplitude” mean to increase or decrease the normal amplitude value set arbitrarily.

  For example, it is assumed that the data D1 stored in the storage device 45 and the data D2 including the comparison result are in the state shown in FIG. When the vibration roller R first reaches the road surface position indicated by the position data P1 in the subsequent number of travels, the degree of compaction of the road surface position indicated by the position data P1 is larger than the reference value as indicated by ◎. Then, the amplitude of the roll 2 is lowered and the road surface is compacted. Specifically, the rod 26a of the hydraulic cylinder 26 shown in FIG. 2 is further extended from a predetermined position to reduce the amount of eccentricity of the excitation shaft 13. As a result, the road surface is compacted with a small vibration force. In FIG. 9B, since the position data P2 is also marked with ◎, the road surface is compacted as in the case of the position data P1. When the road surface compaction degree is larger than the reference value, it is also possible to make the vibration not applied at all, that is, to set the amplitude value to zero. In the present invention, such a case where the amplitude value is controlled to zero is also included in the control of “lowering the amplitude” in the arithmetic unit 46.

  When the vibration roller R reaches the road surface position indicated by the position data P3, the degree of compaction of the road surface position is within the reference value range as indicated by the circles. Return to. Specifically, the rod 26a of the hydraulic cylinder 26 shown in FIG. 2 returns to a predetermined position. As a result, the road surface is compacted with a normal vibration force.

  In FIG. 9B, when the vibration roller R reaches the road surface position indicated by the position data P4, the degree of compaction of this road surface position is smaller than the reference value as indicated by the x mark, so the amplitude of the roll 2 is increased. Increase the height and tighten the road surface. Specifically, the eccentric amount of the excitation shaft 13 is increased by retracting the rod 26a of the hydraulic cylinder 26 shown in FIG. As a result, the road surface is compacted with a large vibration force. The road surface positions indicated by the position data P5 to P9 in FIG. 9B are also compacted by the same control as described above.

  Here, the vibration roller R of the present embodiment has a variable amplitude vibration mechanism 12 (FIG. 2) built in each of the front and rear rolls 2. In this case, for example, when the front roll 2 is located on the road surface of the position data P4 and the rear roll 2 is located on the road surface of the position data P1, the front roll 2 increases the amplitude, and the rear roll 2 What is necessary is just to control the variable amplitude vibration mechanism 12 of each roll 2 separately so that an amplitude may be made low. In some cases, only the variable amplitude vibration mechanism 12 of one roll 2 may be controlled by the arithmetic unit 46, and the other roll 2 may always have a constant amplitude value or may not be vibrated at all.

  The action of the characteristic part of the present invention in which the predetermined amplitude is accurately performed at the position of the vibration roller in the data D1 stored in the storage device 45 will be described more specifically. In FIG. 9, in order to make the explanation easy to understand, the degree of compaction is divided into three stages, but the case where it is divided into five stages will be described with reference to FIG. As described above, in this embodiment, the number of eccentric steps of the movable eccentric weight 17 in FIG. 3 is set to five. FIG. 10 is a diagram in which the number of eccentric steps corresponding to each section is mapped according to the construction lane, (a) is a conventional example according to the technique of Patent Document 1 described above, and (b) is a diagram of the present invention. An application example is shown. As in the case of FIG. 9, the distance of one section is, for example, about 50 cm.

“In the case of the conventional example shown in FIG.
In the map of (1), sampling measurement in that section is started at the first position of each section divided by a vertical line, and sampling in that section is completed until the sampling start time in the next section. The number of each section represents the numerical value of the number of eccentric stages to be set corresponding to the sampling result. In the prior art, since the acceleration signal from the vibration acceleration detecting device is taken into the arithmetic device and the arithmetic processing requires a certain time, the arithmetic time becomes a time lag as shown in the map (2) (1) The section is slightly shifted from the map by the distance L1. Furthermore, since the variable amplitude vibration mechanism is driven in response to the signal from the arithmetic unit, the driving time becomes a time lag, and the section is further shifted by the distance L2 as in the map of (3). In the case of the variable amplitude vibration mechanism 12 shown in FIG. 3, the greater the difference in the changing number of eccentric stages, the longer the drive stroke of the hydraulic cylinder 26, and the greater the section deviation (distance L2).

"In the case of the application example of the present invention shown in FIG. 10B"
The map (1) is the same as the map (1) in FIG. The map of (2) shows a fixed time t1 in which the signal S2 is acquired from the second input device (roll state detecting means 43) and a calculation time, and a drive time “t2” of the variable amplitude vibration mechanism 12 required for one step of the eccentric step number difference. The distance corresponding to “× (Eccentric stage difference)” is calculated by the calculation device 46, and the result is shown as an image. Specifically, in the case of shifting from the first eccentric stage number 1 section to the next eccentric stage number 3 section, the stage number difference is “3−1 = 2”, which corresponds to the time corresponding to “t1 + t2 × 2”. This shows that the control operation is started at the position of the distance L3 before the next section. Since the transition of the next section changes from the eccentric stage number 3 to the eccentric stage number 1, the stage number difference is similarly 2, and the control operation is started at the position of the distance before the next section corresponding to the time “t1 + t2 × 2”. So that Further, since the transition of the next section changes from the eccentric stage number 1 to the eccentric stage number 2, the stage number difference is 1, and the control operation is started at the position of the distance before the next section corresponding to the time “t1 + t2 × 1”. Like that. Thereafter, the same control is performed. As described above, as in the map of (3), the section almost coincides with that of the map of (1) and the correct number of eccentric steps for each section is obtained, and appropriate amplitude is added to each section in a timely manner. Of course, strictly speaking, since the drive time of the variable amplitude vibration mechanism 12, that is, the time for changing the stroke amount of the hydraulic cylinder 26 is involved, a shift region of the eccentric step number is generated near the boundary of the section. It is impossible to completely match the map of (1). However, by taking measures such as increasing the distance of one section, the ratio of the transition area to one section can be reduced, and the ratio of the appropriate number of eccentric steps can be made closer to the map of (1). The times t1 and t2 vary depending on the performance of the arithmetic unit 46 and the variable amplitude vibration mechanism 12, but as an example, each is about 0.1 seconds.

  In obtaining the driving time “t2 × (eccentric step difference)”, the signal S4 from the fourth input device 48 is required. Specific examples of the “amplitude designation state signal S4 of the variable amplitude vibration mechanism” recited in the claims include a control signal output from the control signal generation unit 47 and a signal for detecting the stroke amount of the hydraulic cylinder 26. Accordingly, the fourth input device 48 in this case means a sensor that detects the stroke amount of the control signal generating means 47 and the hydraulic cylinder 26, respectively. It is also possible to derive the signal S4 from the current roll 2 amplitude value. In any case, the signal S4 may be any signal as long as it can identify the current amplitude value of the vibrating roller R that is traveling, that is, the current position of the movable eccentric weight 17.

  In consideration of the case where the vehicle speed of the vibration roller R varies, the calculation device 46 also inputs the signal S3 from the current third input device (vehicle speed detection means 44) when calculating the expected distance. To calculate. That is, the signal S1 from the current first input device (position detecting means 42) and the signal S3 from the current third input device (vehicle speed detecting means 44) are calculated, and the vibration roller R for the target section is calculated. Determine the expected arrival time. In addition, the drive time “t2 × (eccentric stage number difference)” is obtained from the difference between the desired eccentric step number in the target section and the eccentric step number based on the current signal S4, and the start time of the control operation is determined.

  As described above, the first input device (position detecting means 42) that detects the road surface position of the vibration roller R and provides it as the signal S1, the response characteristics of the roll vibration with respect to the road surface, or the sinking amount of the roll 2 with respect to the road surface. A second input device (roll state detection means 43) that detects and provides as a signal S2, a third input device (vehicle speed detection means 44) that detects and provides the traveling speed of the vibrating roller R as a signal S3; The signal S1 and the signal S2 corresponding to the signal S1 are sampled to obtain combined data, a storage device 45 that stores the data, a control signal generation unit 47 that outputs a control signal to the variable amplitude vibration mechanism 12, and a storage device The combination data stored in 45 and the current signal S1 and signal S3 are calculated as input signals, and the data from the first input device stored in the storage device 45 is calculated. An arithmetic unit 46 for calculating and outputting data to the control signal generating means 47 so that a predetermined amplitude corresponding to the data D2 from the second input device stored in combination is added at the position of the vibration roller at D1. If it is set as the vibration control apparatus 41 provided, the whole construction surface can be compacted accurately and uniformly. In the technique of Patent Document 1, since the variable amplitude vibration mechanism is immediately controlled from the detected degree of compaction information, a problem of a shift in distance occurs as the vehicle moves. The degree of compaction information is temporarily stored in the past travel, and the amplitude is controlled in advance for the time lag of the operation time of the variable amplitude vibration mechanism based on the prestored compaction information in the subsequent travel. As a result, the compaction work is performed with the compaction degree information of a certain point reflected as it is at the same point, and the problem of distance deviation can be reduced. Thereby, it becomes possible to compact the whole construction surface accurately and uniformly. In the case of the vibration control device 41 of this configuration, since the signal S4 from the fourth input device 48 is not included in the requirements, the driving time “t2 × (eccentric stage difference)” is controlled as a certain time. However, the problem of the section shift can still be solved as compared with the conventional method.

  The vibration control device 41 further includes a fourth input device 48 that provides a signal S4 in the amplitude designation state of the variable amplitude vibration mechanism 12, and the arithmetic device 46 includes the combination data stored in the storage device 45. When the current signal S1 and the signal S3 are calculated as input signals, the driving time “t2 × (eccentric stage number difference)” is determined according to the difference in the number of eccentric stages if the current signal S4 is also calculated. Can be obtained accurately. Therefore, it becomes possible to compact the entire construction surface more accurately and uniformly.

  When the data D2 stored in the storage device 45 is a value indicating that the degree of road compaction is lower than a predetermined value, the amplitude of the roll 2 is increased, and the degree of road compaction is a predetermined value. If the variable amplitude vibration mechanism 12 is controlled so as to reduce the amplitude of the roll 2 when the value is higher, the entire construction surface can be more uniformly compacted every number of times of traveling. Therefore, the uniformity of the degree of compaction at the end of construction is further improved.

  Further, it is assumed that the arithmetic unit 46 has a compaction degree index data generating means 49 for generating road surface compaction degree index data based on the signal S2, and the compaction degree index data or the compaction degree index data and the preliminarily calculated data are obtained in advance. If the comparison result with the set reference value is the data D2, and the data D2 is combined with the data D1 and stored in the storage device 45, the calculation program in the calculation device 46 can be simplified.

  Further, it is known that the road surface reaction force has a correlation with the degree of road surface compaction. Therefore, the second input device (roll state detection means 43) includes acceleration sensors 32A and 32B that detect the acceleration of the vertical component of the roll, and the compactness index data is detected by the acceleration sensors 32A and 32B. If the road surface reaction force value obtained based on the acceleration is included as a variable, the degree of road surface compaction can be grasped, and the road surface can be more uniformly compacted.

Next, by using the above-described vibration control device 41 and the like, the novel vibration roller compacting method shown in the following embodiments can be realized.
“First Example”
The first embodiment is the most basic compaction method according to the present invention, and represents the function of each device constituting the vibration control device 41 as a method. The specific functions of each device have already been described, and will be briefly described below. In the first embodiment, a vibration roller R (FIG. 1) provided with the variable amplitude vibration mechanism 12 (FIG. 2) is used, and the vibration roller R that repeatedly travels in the same construction lane to compact the road surface. (A) At a certain number of travels, the road surface position of the vibration roller R is detected to obtain data D1, and the response characteristics of roll vibration with respect to the road surface or the amount of settlement of the roll 2 with respect to the road surface And detecting data D2 to store both data D1 and D2 as combined data, and (B) at least one of the number of times of travel after the road position of vibration roller R and vibration roller R The traveling speed is detected, the detection result and the combination data stored in the step (A) are calculated, and the calculation result is stored in the step (A). In the position of the vibration roller in the chromatography data D1, in combination so that a predetermined amplitude corresponding to the stored data D2 is applied, it is characterized in that it comprises a step, for controlling the variable amplitude oscillation mechanism 12.

  Assuming the case where the construction lane is run 6 times (one way is equivalent to 3 round trips), the “number of travel times” in the process (A) is the first travel number. In the process of (B), “at least one of the following number of times of travel” means at least one of the second to sixth number of times of travel. Therefore, to give an extreme example, the present invention also includes a case where the roll is vibrated with a constant amplitude up to the second to fifth run times and the step (B) is carried out at the final sixth run number. It is. However, if the step (B) is delayed in this way, there is a possibility that a slight deviation may occur with respect to the degree of compaction of the road surface between the second to fifth travel times. In this example, it is preferable to carry out the step (B) at the second run number.

  According to the compacting method of the first embodiment described above, the entire construction surface can be compacted uniformly with high accuracy. That is, in the technique of Patent Document 1, since the variable amplitude vibration mechanism is immediately controlled from the detected degree of compaction information, a problem of a shift in distance occurs as the vehicle moves. In the first embodiment, the degree of compaction information is temporarily stored during past travel, and the time lag of the operation time of the variable amplitude vibration mechanism is mainly preliminarily determined based on the prestored compactness information during subsequent travel. Since the amplitude is controlled in anticipation, the compaction work is performed by directly reflecting the degree of compaction information at a certain point to the same point, and the problem of distance deviation can be reduced. Thereby, it becomes possible to compact the whole construction surface accurately and uniformly.

"Second Example"
In the second embodiment, in the step (B) of the first embodiment, the detection results of the road surface position of the vibration roller and the traveling speed of the vibration roller and the combination data stored in the step (A) are calculated. The calculation is performed in consideration of the signal S4 in the amplitude designation state of the current variable amplitude vibration mechanism 12 as well. Since the specific contents have already been described in the section of the arithmetic unit 46, description thereof is omitted here. According to the second embodiment, the entire construction surface can be uniformly compacted with higher accuracy.

“Third Example”
In the third embodiment, in the step (B), when the data D2 stored in the step (A) is a value indicating that the degree of road compaction is lower than a predetermined value, The variable amplitude vibration mechanism 12 is controlled so as to reduce the amplitude of the roll when the amplitude is increased and the road surface is a value indicating that the degree of compaction of the road surface is higher than a predetermined value. Since the specific contents have already been described in the section of the arithmetic unit 46, description thereof is omitted here. According to the third embodiment, the entire construction surface can be more uniformly compacted every number of times of traveling, so that the uniformity of the compaction degree at the end of construction is further improved.

"4th Example"
The fourth embodiment is characterized in that the data D2 is road surface compaction index data or a comparison result between the compaction index data and a preset reference value. This simplifies the processing program in the arithmetic device or the like.

"5th Example"
In the fifth embodiment, when the defect rate of the data D2 stored in the step (A ′) (A) is lower than the reference rate between the step (A) and the step (B). Includes a step of vibrating the roll 2 with a constant amplitude without controlling the variable amplitude vibration mechanism 12 and performing the step (B) when the roll rate is higher than the reference rate. Regarding the total number of compaction degree index data (for example, elastic modulus E _sa ) stored in the step (A), the individual compactness degree index data has passed or failed with respect to an appropriately set pass value. The ratio of the number of rejects with respect to the total number when divided into these two ways is the “defective rate” of the present invention. Alternatively, regarding the total number of comparison results stored in the step (A), the total number when the individual comparison results are divided into two types, that is, whether they have passed or failed with respect to an appropriately set pass value. The ratio of the number of rejects to the “failure rate” of the present invention. These defective rates are compared with an arbitrarily set reference rate.

  First, FIG. 9A will be described as an example. When the pass value of the compaction degree index data is set to 190, when 190 or more is passed and less than 190 is rejected, position data is shown in FIG. 9A. Each compaction degree index data of P4, P5, and P6 is unacceptable. Therefore, the defect rate in this case is 3/9 (≈33.3%). If the reference rate is set to 35%, the defect rate is lower than the reference rate. Therefore, the roll 2 is vibrated with a constant amplitude without controlling the variable amplitude vibration mechanism 12. Further, if the reference rate is set to 30%, the defect rate is higher than the reference rate, so the step (B) is performed. In other words, compaction is performed by controlling the variable amplitude vibration mechanism 12.

  9B will be described as an example. When the pass values of the comparison results are set to ◎ and ○, the comparison results of the position data P4, P5, and P6 are not acceptable in FIG. 9B. is there. Therefore, the defect rate is 3/9 (≈33.3%). If the reference rate is set to 35%, the defect rate is lower than the reference rate, so the roll is vibrated with a constant amplitude without controlling the variable amplitude vibration mechanism 12. Further, if the reference rate is set to 30%, the defect rate is higher than the reference rate, so the step (B) is performed. In other words, compaction is performed by controlling the variable amplitude vibration mechanism 12.

  According to the present embodiment in which the step (A ′) is interposed, it is possible to prevent road surface disturbance due to excessive amplitude control. Road disturbance means surface irregularities, cracks, and the like as described above. Further, by providing, for example, a selection switch for determining whether or not to include the step (A ′), a numerical value change switch for the reference rate, and the like as a device, the construction manager can easily cope with the situation of the construction road surface.

“Sixth Example”
The sixth embodiment is characterized in that, in the step (B), the variable amplitude vibration mechanism 12 is always controlled based on the latest past data D2 (consolidation degree index data or comparison result). Assuming the case where the construction lane is traveled 6 times, the process (A) is performed at the first traveling number, and the compaction obtained at the first traveling number is obtained at all the second to sixth traveling times. When step (B) is performed based on the degree information, in some cases, as the number of times of travel is increased, there is a difference between the degree of compaction information obtained at the first number of times of travel and the latest degree of compaction of the road surface. There is a risk of coming. On the other hand, for example, at the third travel number, the step (B) is performed based on the compaction degree information obtained at the step (A) of the second travel number immediately before the third travel number. In the above, the latest data D2 (consolidation degree index data) is always recorded so that the process (B) is performed on the basis of the degree of compaction information obtained in the process (A) of the third travel number immediately before the third run. If the variable amplitude vibration mechanism 12 is controlled based on the comparison result), the latest degree of compaction of the road surface can be accurately grasped, and the degree of compaction can be made uniform with high accuracy.

"Seventh Example"
In the seventh embodiment, when the vibration roller R is run “N _pass ” a predetermined number of times in the same construction lane and the road surface is compacted, “N _pass −i” (where i is from 1 to (N _pass −1)). The step (A) is applied while the roll is vibrated at a constant amplitude without controlling the variable amplitude vibration mechanism 12 at the number of times of traveling). Assuming the case where the construction lane is traveled 6 times, N _pass = 6. This compacting method is an effective method for increasing the degree of compaction of the road surface. In the first half, for example, the maximum degree of compaction of the road surface can be increased as a whole by always applying the maximum amplitude. Further, by controlling the variable amplitude vibration mechanism 12 in the latter half, the energy required for compaction can be suppressed and the compaction degree can be made uniform.

“Eighth Example”
The eighth embodiment adjusts the amplitude of the vertical component of the tire and the primary compaction construction in which the first vibration roller composed of the iron wheel roller is repeatedly run on the same construction lane composed of the asphalt road surface to compact the road surface. A secondary compaction construction in which a second vibration roller comprising a tire roller having a variable amplitude vibration mechanism capable of being repeatedly run in the same construction lane to compact the road surface, and a third vibration roller comprising an iron wheel roller The present invention relates to a compaction construction method for performing a third compaction construction in which the road surface is compacted by repeatedly traveling in the same construction lane. The vibration roller R shown in FIG. 1 can be used as the first vibration roller and the second vibration roller. As the second vibrating roller, for example, the one described in JP-A-8-326011 can be used. For the convenience of the following explanation, although not shown in the figure, the variable amplitude vibration mechanism of the tire roller is denoted by S. The primary compaction work is mainly aimed at increasing the compaction of the asphalt mixture just leveled and flattening the road surface. The main purpose is to compact the road surface, and the third compaction work is mainly intended to remove the tire marks (shallow wrinkles) of the tire rollers remaining on the surface.

  In the eighth embodiment, (C) in the primary compaction construction, the roll is vibrated with a constant amplitude over the entire travel, and the road surface position of the first vibration roller is detected and the data D1 is obtained at the final travel count. And obtaining data D2 by detecting the response characteristics of roll vibration with respect to the road surface or the amount of settlement of the roll with respect to the road surface, and storing both data D1 and D2 as combined data, (D) in the first vibration roller A step of wirelessly transmitting information on the data D1 and D2 from the mounted transmitter to a receiver mounted on the second vibrating roller; (E) at least one number of times of secondary compaction construction; The road surface position and traveling speed of the vibration roller are detected, the detection result and the combination data stored in the step (C) are calculated, and the process of (C) is calculated from the calculation result. (F) a third tightening step, wherein the variable amplitude vibration mechanism is controlled so that a predetermined amplitude corresponding to the data D2 stored in combination is applied at the road surface position of the first vibration roller in the data D1 stored in (1). In solidification construction, the roll is vibrated with a constant amplitude over the entire travel, and the road surface position of the third vibration roller is detected and the data D1 is obtained at the final number of travels, and the response characteristic of the roll vibration to the road surface, or Detecting the amount of roll subsidence with respect to the road surface to obtain data D2, storing both data D1 and D2 as combined data, and (G) storing the combined data stored in the step (F) in a recording medium , Including.

  In addition, before performing this construction, it is necessary to carry out a test construction in advance and grasp the relationship between the compactness index data and the road surface compaction degree in each construction of the first to third compaction constructions. . In some cases, correction regarding data may be performed between each compaction operation.

"Primary compaction construction"
Assuming that the first vibrating roller travels 6 times, as can be seen from the step (C), the road surface is compacted with a constant amplitude at all 6 times of travel. Therefore, the first vibration roller may be of a type that does not have a variable amplitude vibration mechanism. And in the 6th driving frequency which is the last driving frequency, by using the position detecting means 42, the roll state detecting means 43 and the like shown in FIG. 4, the road surface position of the first vibration roller is detected. The response characteristic of roll vibration to the road surface or the amount of roll subsidence to the road surface is detected. Next, information related to the data D1 and D2 for the sixth run number is stored. In this primary compaction construction, the degree of compaction of the road surface can be increased as a whole by always applying a large amplitude without changing the amplitude.

  When the primary compaction is completed, the information on the data D1 and D2 is wirelessly transmitted from the transmitter mounted on the first vibrating roller to the receiver mounted on the second vibrating roller by the step (D). . Here, the data to be transmitted is not limited to the combination data stored in the step (C). For example, calculation processing for obtaining data D1 and D2 by wirelessly transmitting signals such as the road surface position of the vibrating roller detected in the step (C), the response characteristics of roll vibration to the road surface, and the amount of settlement of the roll relative to the road surface. The processing may be performed on the device side mounted on the second vibration roller. That is, the “information regarding the data D1 and D2” transmitted wirelessly may be anything that can uniquely derive the data D1 and D2.

"Secondary compaction construction"
In the secondary compaction construction, in at least one run, the road surface position and the running speed of the second vibrating roller are detected, the detection result and the combination data stored in the step (C) are calculated, From the calculation result, the variable amplitude vibration mechanism S is added so that a predetermined amplitude corresponding to the data D2 stored in combination is added at the road surface position of the first vibration roller in the data D1 stored in the step (C). To control. As a suitable example, a process according to (A ′) of the fifth embodiment may be interposed.

"3rd compaction construction"
Assuming that the third vibrating roller travels four times, the road surface is compacted with a constant amplitude at all four times of travel, as can be seen from the step (F). Therefore, the third vibration roller may be of a type that does not have a variable amplitude vibration mechanism. Since this third compaction construction is mainly intended to remove tire marks, the amplitude is generally set low. And in the 4th driving frequency which is the last driving frequency, by using the position detecting means 42, the roll state detecting means 43 and the like shown in FIG. 4, the road surface position of the third vibrating roller is detected, The response characteristic of roll vibration to the road surface or the amount of roll subsidence to the road surface is detected. Next, information relating to the data D1, D2 for the fourth number of times of travel is stored in combination. And each data memorize | stored at the process of (G) is finally preserve | saved as construction data in recording media, such as a hard disk of a personal computer.

  According to the above eighth embodiment, in the construction method of compacting the asphalt road surface in the order of the iron wheel roller → the tire roller → the iron wheel roller, the compaction work by the tire roller is mainly based on the preliminarily stored compaction degree information. Since the amplitude is controlled in anticipation of the time lag of the operation time of the variable amplitude vibration mechanism, the compaction work is performed by reflecting the degree of compaction information at a certain point as it is at the same point, and the problem of distance deviation is reduced. Thereby, it becomes possible to compact the whole construction surface accurately and uniformly. Moreover, since it constructs with a some vibration roller, the efficiency of construction can be improved.

  In the foregoing, the optimum embodiment of the present invention has been described. The present invention is not limited to the one described in the drawings, and can be appropriately modified within a range not departing from the gist thereof.

It is side surface explanatory drawing of the type of vibration roller which has a roll of an iron ring. It is a plane cross-section explanatory drawing of the variable amplitude vibration mechanism incorporated in the roll. It is the partial detail figure which looked at the excitation shaft in the side cross section. It is a block diagram which shows the structure of a vibration control apparatus. It is side surface explanatory drawing of the vibration roller at the time of attaching the ultrasonic sensor which measures the amount of sinking of a roll. It is a figure which shows a state when a roll moves below by one amplitude. It is the figure which represented the vibration behavior of the roll as a vibration model of 2 degrees of freedom. It is the graph which showed the relationship between the elastic modulus _Esa which is compaction degree index data, and the compaction degree based on the test data performed about a certain asphalt road surface material. The vertical axis represents the value of the elastic modulus _Esa at the time of construction, and the horizontal axis represents the value of the degree of compaction after the asphalt road surface material has cooled and solidified. It is the figure which mapped the memorized data according to the construction lane, (a) is the case where the degree of compaction index data (elastic coefficient E _sa ) and the position data are related, (b) is the comparison result and the position data Shows the case of associating. It is the figure which mapped the eccentric step number corresponding to every area according to the construction lane, (a) shows the example according to a prior art, (b) shows the example of application of this invention.

Explanation of symbols

2 roll 12 variable amplitude vibration mechanism 32A, 32B acceleration sensor 41 vibration control device 42 position detection means (first input device)
43 Roll state detection means (second input device)
44 Vehicle speed detection means (third input device)
45 Storage device 46 Arithmetic device 47 Control signal generating means 48 Fourth input device 49 Compaction degree index data generating means

Claims (13)

A vibration control device for a vibration roller having a variable amplitude vibration mechanism capable of adjusting the amplitude of a vertical component of a roll,
A first input device that detects a road surface position of the vibration roller and provides it as a signal S1,
A second input device that detects a response characteristic of roll vibration with respect to the road surface or a roll subsidence amount with respect to the road surface and provides it as a signal S2,
A third input device that detects the traveling speed of the vibration roller and provides it as a signal S3;
A storage device for sampling the signal S1 and the signal S2 corresponding to the signal S1 into combination data, and storing the combined data;
Control signal generating means for outputting a control signal to the variable amplitude vibration mechanism;
The combination data stored in the storage device and the current signal S1 and signal S3 are calculated as input signals,
The control is performed so that a predetermined amplitude corresponding to the data D2 from the second input device stored in combination is added at the position of the vibration roller in the data D1 from the first input device stored in the storage device. An arithmetic device for calculating and outputting data to the signal generating means;
A vibration control device for a vibration roller, comprising: A fourth input device for providing a signal S4 in an amplitude designation state of the variable amplitude vibration mechanism;
2. The arithmetic device according to claim 1, wherein when calculating the combination data stored in the storage device and the current signal S1 and the signal S3 as input signals, the arithmetic device also takes into account the current signal S4. The vibration control apparatus of the vibration roller as described in 2.   When the data D2 stored in the storage device is a value indicating that the degree of road compaction is lower than a predetermined value, the roll amplitude is increased and the degree of road compaction is higher than a predetermined value. 3. The vibration control device for a vibration roller according to claim 1, wherein the variable amplitude vibration mechanism is controlled so that the amplitude of the roll is lowered when the value indicates that the roll amplitude is low. The arithmetic unit is:
A degree of compaction index data generating means for generating road surface compactness index data based on the signal S2,
2. The compactness index data or a comparison result between the compactness index data and a preset reference value is set as the data D2, and is stored in the storage device in combination with the data D1. The vibration control apparatus of the vibration roller in any one of Claim thru | or 3. The second input device includes an acceleration sensor that detects an acceleration of a vertical component of the roll,
5. The vibration control device for a vibration roller according to claim 4, wherein the compaction index data includes a value of a road surface reaction force obtained based on an acceleration detected by the acceleration sensor as a variable. A vibration roller compacting method using a vibration roller having a variable amplitude vibration mechanism capable of adjusting the amplitude of a vertical component of a roll, and repeatedly driving the vibration roller in the same construction lane to compact a road surface. ,
(A) At a certain number of times of travel, the road surface position of the vibration roller is detected to obtain data D1, and the response characteristic of roll vibration to the road surface or the amount of roll subsidence to the road surface is detected to obtain data D2. Storing data D1 and D2 as combination data;
(B) In at least any one of the subsequent number of running times, the road surface position of the vibrating roller and the running speed of the vibrating roller are detected, and the detection result and the combination data stored in the step (A) are calculated. And
A step of controlling the variable amplitude vibration mechanism so that a predetermined amplitude corresponding to the data D2 stored in combination is added at the position of the vibration roller in the data D1 stored in the step (A) from the calculation result. ,
A method for compacting a vibrating roller, comprising:   In the step (B), when calculating the detection results of the road surface position of the vibration roller and the traveling speed of the vibration roller and the combination data stored in the step (A), the current amplitude of the variable amplitude vibration mechanism is calculated. 7. The vibration roller compacting method according to claim 6, wherein the calculation is performed in consideration of the signal S4 in the designated state.   In the step (B), when the data D2 stored in the step (A) is a value indicating that the degree of compaction of the road surface is lower than a predetermined value, the amplitude of the roll is increased, and the road surface The variable amplitude vibration mechanism is controlled so as to reduce the amplitude of the roll when the degree of compaction of the roll is a value indicating that the roll is higher than a predetermined value. Method for compacting vibration rollers.   9. The data D2 according to any one of claims 6 to 8, wherein the data D2 is road surface compaction index data or a comparison result between the compaction degree index data and a preset reference value. How to compact vibration roller. Between the step (A) and the step (B),
(A ′) When the defect rate of the data D2 stored in the step (A) is lower than the reference rate, the roll is vibrated with a constant amplitude without controlling the variable amplitude vibration mechanism, Is higher, the step of performing the step (B),
The vibration roller compacting method according to claim 9, comprising:   11. The vibration roller compacting method according to claim 10, wherein in the step (B), the variable amplitude vibration mechanism is always controlled based on the latest past data D2. When driving the vibration roller for the specified number of times “N _pass ” in the same construction lane and compacting the road surface,
While the roll is vibrated at a constant amplitude without controlling the variable amplitude vibration mechanism, the number of running times of “N _pass -i” (where i is an integer from 1 to (N _pass −1)) 11. The vibration roller compacting method according to claim 10, wherein the step (A) is applied. Primary compaction construction in which a first vibration roller made of an iron wheel roller is repeatedly run on the same construction lane made of asphalt road surface to compact the road surface;
Secondary compaction construction in which a second vibration roller comprising a tire roller having a variable amplitude vibration mechanism capable of adjusting the amplitude of the vertical component of the tire is repeatedly run in the same construction lane to compact the road surface;
Third compaction construction in which a third vibration roller made of an iron wheel roller is repeatedly run in the same construction lane to compact the road surface;
A method for compacting a vibrating roller
(C) In primary compaction construction, the roll is vibrated with a constant amplitude over the entire travel, and the road surface position of the first vibration roller is detected and the data D1 is obtained at the final travel count, and the roll with respect to the road surface Detecting the response characteristics of vibration or the amount of settlement of the roll with respect to the road surface to obtain data D2, and storing both data D1 and D2 as combined data;
(D) A step of wirelessly transmitting information on the data D1 and D2 from a transmitter mounted on the first vibrating roller to a receiver mounted on the second vibrating roller;
(E) The road surface position and the traveling speed of the second vibration roller are detected in at least one traveling number of the secondary compaction construction, and the detection result and the combination data stored in the step (C) are used. Operate,
From the calculation result, the variable amplitude vibration mechanism is applied so that a predetermined amplitude corresponding to the data D2 stored in combination is added at the road surface position of the first vibration roller in the data D1 stored in the step (C). Controlling the process,
(F) In the third compaction construction, the roll is vibrated with a constant amplitude over the entire travel, and the road surface position of the third vibration roller is detected and the data D1 is obtained at the final travel count, and the roll with respect to the road surface Detecting the response characteristics of vibration or the amount of settlement of the roll with respect to the road surface to obtain data D2, and storing both data D1 and D2 as combined data;
(G) a step of storing the combination data stored in the step (F) in a recording medium;
A method for compacting a vibrating roller, comprising:

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