JPH0214481B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a road surface compaction method using a rolling compaction machine.

Conventionally, there are two types of road surface pavement: cement concrete pavement and asphalt concrete pavement. Before paving with these paving materials, a gravel layer is provided, and this is compacted with a compaction machine to form a foundation, and then paved.
If the rolling pressure is soft, cracks will occur on the pavement surface, causing problems such as peeling and cave-ins.

Therefore, it is required that the compaction of the road surface pavement be uniform and sufficient.In general, the degree of compaction of a road by a compaction machine is determined by the number of compactions of the compaction machine, that is, the number of passes of the compaction machine in the construction specifications. It is often replaced and managed by

However, the reality is that the number of passes of the rolling compaction machine is left to the driver's memory, and the forward and reverse travel distances also depend on the driver's visual estimation and memory, so it is inevitable that The current situation is that the number of times of compaction is partially uneven, making it extremely difficult to manage an even degree of compaction.

In view of the above-mentioned circumstances, the present invention aims to provide a road surface compaction method that equalizes the degree of road surface compaction. The forward section, backward section, and route change section are defined, and the rolling machine is managed to operate according to the programmed program. The road surface is divided into parallelogram-shaped rolling blocks, and the road surface width is divided into an appropriate number of travel lanes, and after the rolling machine advances a distance Lf on the first lane for each rolling block, the rolling machine moves forward by a distance Lf from the distance Lf. The rolling machine is characterized by moving backward a short distance Lr to move to the second lane, repeating the same process, and moving to the adjacent lane of the articulated block after completing the forward and reverse movement of the last lane. It compacts the road surface uniformly according to the regularization program.

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a rolling process diagram according to the present invention, and FIG. 2 is another rolling process diagram. In the drawing, symbol B is the road width, and distance Lf is the length of the rolling block.
Lr is the retreating distance for each driving lane, and has the relationship L−Lr=△L>O.

During work, a base point P is set at the base end on the road width side of the road surface to be compacted, and a certain distance Lf is set in the forward direction of the road surface length.
Determine partition points P, P ¹ , P ² ...P ^N for each. Also, set Pa at the same point as the base point P on the other end of the road width, and move forward from Pa to △L x road width lane number = Ls
The base point Pa ¹ is set at the point moved forward by . Determine points Pa ¹ , Pa ² , Pa ³ . . . at each distance Lf from the base point P, connect the base point P and base point Pa ¹ with a straight line, and connect the division points at both ends parallel to this with a straight line. Set up a diamond-shaped parallelogram rolling block. In other words, in the figure, a parallelogram connecting points P, P ¹ , Pa ² , Pa ¹ , P is one rolling block, and an adjacent block connects points P ¹ , P ² , Pa ³ , Pa ² , P ¹ The compaction blocks are set in a line, and such rolling blocks are sectioned in a chain in the path length direction.

Further, the road width is divided into an appropriate number of lanes (5 lanes in the figure) depending on the width of the rolling wheels of the rolling machine and the road width to determine driving lanes.

During compaction work, the compaction machine advances from the base point P ₁ in the first travel lane by a certain distance Lf to the line P ¹ -
Stop at the point where it touches Pa ² . The following steps are performed sequentially as follows.

The rolling machine is assumed to retreat for a certain distance Lr, of which the linear retreat distance is Lr - t = T.
, and t is the distance required to change the route. Based on the settings of this formula, advance/retreat and route change processes are performed in the following order.

1 Move forward in the first lane for a distance Lf and then stop.
Back up T distance, change route to the second lane at T distance, and stop. The stopped position is the second
It is the position of the base point P ₂ of the lane, and the base point P ₁ − base point
The distance between P ₂ corresponds to △L.

2 Move forward in the second lane for distance Lf and stop.
Reverse the distance T, change route to the third lane within the distance t, and stop at the third base point _P3 .

3 Move forward a distance Lf in the third lane and stop. T
Move back a distance, change route to the fourth lane at a distance of t, and stop at the fourth base point _P4 .

4 Move forward in the 4th lane for distance Lf and stop.
Move backward T distance, change route to the 5th lane at t distance, and stop at the 5th base point Pn.

5 Move forward a distance Lf in the 5th lane and stop. Since this is the final N lane, move straight back Lr distance and stop. This stopping position is a point moved forward in the road surface length direction by a distance ΔL from the base point Pn of the fifth lane, and the sixth lane is set so as to partially overlap the fifth lane.

6 Move forward a distance Lf in the 6th lane and stop. T
The vehicle moves backwards for a distance of t, changes route to the 7th lane, which partially overlaps the 4th lane, and stops for a distance of t.

Thereafter, the same steps of advancing and retreating and changing routes are continuously repeated to perform rolling, and the rolling block is changed and moved forward.

In the above work process method, as shown in Figure 1, the first rolling block is a roughly rhombic parallelogram surrounded by points P, P ¹ , Pa ² and Pa ¹ , and the next rolling block is at the point
It is a roughly rhombic parallelogram rolling block surrounded by points P ¹ , P ² , Pa ² , and Pa ¹ , and in the process of changing this rolling block, the points surrounded by points P ¹ , Pa ¹ , and Pa ² are The isometric triangular part will be rolled twice, but the point
During the rolling process of the approximately rhombic parallelogram rolling block surrounded by P ¹ , P ² , Pa ³ , and Pa ² , the isosceles triangular part surrounded by points P ¹ , P ² , and Pa ² also doubles. In the end, when compaction is applied to the entire length of the road surface, the compaction machine applies four rolling pressures (twice forward and twice backwards) to all parts uniformly. ) will be done. The purpose can be achieved by separately rolling the triangular portion surrounded by points P, Pa ₁ and Pa and the remaining portion having the same shape.

If the number of compactions is 8, it is sufficient to repeat forward and backward movements twice in each lane, and the forward distance is 2Lf, that is, a long and narrow parallelogram with the first lane extending between points P and P ² . If we move the rolling block by the distance Lf, then move back in a straight line by a distance Lf + T, retreat a distance t to the adjacent lane, perform the advance/retreat and route change described in steps 1 to 6 of the process description above, and move the compaction block by the distance Lf, then the point P ² in Figure 1 is reached. , Pa ³ , and Pa ² and beyond, eight rolling cycles can be obtained.

FIG. 2 shows a system in which the rolling blocks are moved in a straight line for each parallelogram shaped rolling block.

Each rolling surface has the same parallelogram shape as shown in FIG. 1, and the advance and retreat of rolling and route changes are also performed in the same strokes as described in items 1 to 4 of the stroke description.

After that, move forward a distance L in the 5th lane, stop, move back a distance T, and change route to the 4th lane for a distance t. From then on, the same forward, backward, and route changes are made as described above to make a transition in the road width direction, and when you return to the first lane, you continue forward to the next compaction block, that is, points P ¹ , P ³ , and Proceed to the point that touches the line P ¹ - Pa ² of the first lane in the part surrounded by Pa ⁴ and Pa ² ,
The rolling stroke in the road surface width direction is carried out in the same manner as shown in FIG. When compaction work is performed at the discretion of the operator, the above points P, P ¹ ...Pa ¹ , Pa ²
..., etc., are indicated and specified using a display pole, etc.

To automatically control and manage the rolling machine mechanically without relying on human management of the rolling process program described above, the following automatic control and management device for the rolling machine is used. FIG. 3 shows an embodiment of a compaction machine equipped with the automatic control management device, and FIG. 4 is a plan view showing its steering mechanism. FIG. 5 is a block circuit and transmission path diagram of the automatic control management device. Examples will be described below.

A conventional rolling machine can be used as the rolling machine. The rolling machine 1 includes a main body 3 on which a drive device 2 is mounted, and a steering wheel 4 and a drive wheel 5 that are pivotally attached to the front and rear lower portions of the main body 3. steering wheel 4
A fixed shaft 7 is attached to the lower end of a plurality of forks 6 erected.
Each of the forks 6 is integrally connected at its upper end with a connecting rod 8, and an operating shaft 9 is erected at the upper end of the central portion of the connecting rod 8. The operating shaft 9 is fitted into an inner hole of a shaft support 10 installed in the vehicle body frame at the front of the main body 3 of the rolling machine. A steering rod 11 is fixed to the steering shaft 9 at a position close to the connecting rod 8, and a connecting shaft 12 is attached to the tip of the steering rod 11 to connect the hydraulic steering cylinder 1.
The tip of the piston rod 14 of No. 3 is pivotally attached, and the steering angle θ of the steering wheel 4 can be arbitrarily changed by changing the cylinder stroke of the hydraulic steering cylinder 13. The hydraulic steering cylinder 13 is installed at the lower part of the driver's cab of the main body 3 of the rolling compaction machine 1.

The steering shaft 9 is also equipped with an angular displacement sensor 19 composed of a direction angle sensor circuit (not shown), a direction angle displacement detector, etc., and the rotation direction and steering angle θ of the steering shaft 9 are electrically detected. It is detected and a detection signal is sent to an automatic control management device 15, which will be described later. An automatic control management device 15 is installed at the front of the driver's cab, and a microcomputer (not shown) is built into the frame housing, and an input/output switch button 16 is displayed on the upper surface of the frame housing. has been done. The input/output switch button 16 includes a power switch, a distance designation numeric button, an operation designation button, a clear switch button, etc.

The microcomputer 17 is composed of main digital circuits such as an input/output circuit 17a, a memory circuit 17b, an arithmetic circuit 17c, and a control circuit 17d.The control circuit 17d includes a drive circuit, a steering circuit, and their command circuits. The drive section circuit end is connected to an electric circuit end of a drive control device 21, which will be described later, and the steering section circuit end is connected to an electric circuit end of a steering control device 20, which will be described later.

Terminals of sensor circuits 18a and 19a of the rotation sensor 18 and the angular displacement sensor 19 are connected to the arithmetic circuit.

A circuit 18a end of the rotation sensor 18 is connected to an electric circuit end of a distance speed detector 18b, which will be described later.

The drive device (not shown) consists of a diesel engine, a transmission device that transmits its driving force to the drive wheels 5, an associated accelerator/clutch, a brake, and their auxiliary devices. A drive control device 21 is connected.

The steering control device 20 (not shown) has an electromagnetic proportional valve 20a incorporated in a hydraulic valve mechanism that slides the piston rod 14 of the hydraulic steering cylinder 13.
The electromagnetic proportional valve 20a opens and closes under the command and control of the automatic control management device 15, and the forward and backward movement of the piston rod 14 is controlled, thereby displacing the steering angle θ of the steering rod 11 connected to the tip thereof. The steering shaft 9, the frame 6 connected thereto, and the steering wheels 4 are actuated to control steering.

The distance and speed detector 18b (not shown) is connected to the rotating portion of the drive wheel 5. The distance speed detector 18b detects the rotational speed and traveling distance of the drive wheel 5 and sends the signal to the microcomputer 17 via the rotation sensor circuit 18a. It is composed of a shaft, a rotating body rotated by the flexible shaft, and a detection circuit device that is in contact with the rotating body and detects and transmits the speed and number of rotations of the rotating body.

Since the automatic control management device 15 and the rolling machine 1 equipped with it are configured as described above, if the aforementioned rolling work process program is stored in the microcomputer 17 built in the automatic control management device 15, The rolling machine 1 automatically executes rolling according to the program.

In order to store the rolling process program in the automatic control management device 15, the following steps are taken.

1 Turn on the power switch and press the input button and forward button. Next, press the distance designation number button for the forward distance Lf, and press the stop button.

2 Press the backward button, then press the distance designation number button for backward distance T. Next, press the direction change button, press the distance designation number button to designate the direction change distance t, designate the direction of change direction (left/right), designate the direction change angle, and press the stop button.

3 With the above, the base point P ₂ from the first lane to the second lane
Therefore, give a steering angle correction command and a start command, and continue inputting the process described in item 1 above for the number of travel lanes, and if the number of rolling turns is, for example, 4 rotations, reverse the travel lane. Alternatively, it is possible to specify and store the starting point line as appropriate, such as reversing the point P-Pa ¹ as the starting point line and moving it obliquely in the direction of the point Pa ¹ -P ¹ . If you make an input mistake, press the clear button to correct it.

When the above-mentioned compaction process program is input to the automatic control management device 15, signal pulses enter the arithmetic circuit from the input circuit, and the arithmetic circuit classifies the input signals, selects and specifies the memory addresses of the memory circuit, and stores them. When rolling compaction is to be carried out, the output button is pressed to activate the control management device. The rolling machine 1 faithfully executes the rolling work pattern and the operation stroke of the drive device steering device stored in the automatic control management device 15,
The direction angle displacement detector 19b and the distance speed detector 1
The detection results at 8b are fed back to the arithmetic circuit 17c via the heading angle sensor circuit 19a and the rotation sensor circuit 18a connected thereto, and the signals are classified and addressed therein and stored in the memory circuit 17.
sent to b. The input signal is stored in memory circuit 1
7b, the command circuit of the control circuit 17d classifies the signal and sends it to each control circuit of the drive control device 21 or the steering control device 20 to control the operation of each device connected to the ends of these circuits. Control and manage.
Therefore, the rolling process program is controlled by the automatic control device 1.
5, the rolling machine 1 executes the desired rolling.

As described above, the present invention divides the road surface to be rolled into small sections, divides the road surface in the road width direction into an appropriate number of travel lanes determined from the width of the rolling wheels of the rolling machine, the number of rolling times, etc., and moves forward. It is possible to program sections, retreat sections, and route change sections in advance to perform accurate and uniform compaction.

For this reason, uniform rolling compaction control conventionally relied on the driver's visual estimation and memory, but with the method of the present invention, even on paved compacted road surfaces spanning several kilometers, the work process can be controlled from the beginning to the end. In addition to being able to perform uniform road surface compaction according to the program, it also has the advantage of not relying on the skill level of the driver, reducing the labor of the workers, and allowing sufficient effort to be focused on labor safety management.

The rolling process shown in FIGS. 1 and 2 according to the present invention is easy to perform using an automatic control management device. Furthermore, the road surface divisions and work steps are not limited to those described above, and the work steps can be set up in any way and can be stored in the automatic control management device and executed for rolling.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the working process of the compacting method of the present invention, Fig. 2 is an explanatory drawing of the working process of another embodiment, Figs. 3 and 4 are the compacting machine, and Fig. 5 is the block circuit of the control management device. figure. Lf...Rolling block distance, T...Retraction distance, t...
Route change distance, P ₁ , P ₂ , P ₃ ... Travel lane reference point,
P, P ¹ , P ² ... Pa ¹ , Pa ² ... Block division point, B
...Road width, 1...Rolling machine, 2...Drive device, 3...Main body, 4...Steering wheel, 5...Drive wheel, 6...Fork, 7
... fixed shaft, 8 ... connecting rod, 9 ... steering shaft, 10 ... shaft support, 11 ... steering rod, 12 ... connecting shaft, 13 ... hydraulic steering cylinder, 14 ... piston rod, 15 ... automatic control management device , 16... switch button, 17... microcomputer, 18... rotation sensor, 19... angular displacement sensor, 20... steering control device.

Claims (1)

[Claims] 1. The road surface to be rolled is divided into an appropriate number of parallelogram-shaped rolling blocks having a constant distance Lf in the length direction, and the road surface width is divided into an appropriate number of travel lanes,
When the rolling machine moves forward a distance Lf on the first lane for each of the rolling blocks, it moves backward a distance Lr that is △L shorter than the distance Lf, moves to the second lane, repeats the same process, and then moves to the second lane. A road surface compaction method characterized by moving to an adjacent lane of an articulated block after completing forward and backward movement of the lane. 2. The method for compacting a road surface according to claim 1, wherein the distance traveled and the number of times of rolling of the rolling machine are measured by visual observation and memory of an operator of the rolling machine. . 3. The rolling machine is equipped with a rotation sensor that detects the speed and travel distance, an angular displacement sensor that detects the steering angle, and a means for automatically controlling the work process according to a set desired rolling pattern. The method for compacting a road surface according to item 1 above.