JPS6151085B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for pouring subgrade concrete in tunnels using a leveling machine and a finishing machine that can automatically adjust the level and cant using laser light. Regarding the method of construction.

The roadbed on which rails for railway vehicles are laid requires strict level and cant control. Conventionally, concreting for the roadbed involved multiple level measurements. However, such concrete pouring methods that involve surveying require a lot of manpower and time, and there are limits to leveling accuracy. Particularly when constructing a subgrade in a narrow space such as a tunnel, concrete supply work and surveying work are mixed up, resulting in a significant drop in pouring efficiency.

By the way, concrete pouring methods have recently improved significantly, so there are no particular problems with the supply of concrete, but there are problems with level measurement and leveling of the supplied concrete, and no countermeasures can be taken. It was wanted. Therefore, in recent years, a leveling method using a laser beam has been proposed. That is, a construction method has been developed in which a reference plane is formed using a laser beam and the ground is leveled or leveled based on the reference plane.

The present invention utilizes the above-mentioned level adjustment method using laser light, and also develops a new feeder and finisher to provide a concrete placing method with high leveling accuracy and high work efficiency. According to the present invention, the feeder is provided with at least a leveling machine, and the level and cant adjustment of the leveling machine is configured to be performed by detecting a laser beam reference plane formed by a laser beam. Ru. After a certain level of leveling is achieved using a leveling machine, the finisher is run. The finisher is equipped with a finishing machine that vibrates and hardens the concrete surface, and the level and cant of this finishing machine are also configured to be determined by detecting a laser beam reference plane.

As described above, according to the present invention, the feeder having a leveling machine and the finisher having a finishing machine are run while leveling is carried out, and the level or cant thereof is constantly adjusted by laser light. Therefore, the level accuracy of the subgrade is high and the pouring work efficiency is also high.

EMBODIMENT OF THE INVENTION Hereinafter, one example of the apparatus utilized for carrying out the construction method of this invention is demonstrated with drawing, and the construction method based on this invention is also demonstrated together.

Now, Figure 1 shows feeder 1 and finisher 30.
These feeders and finishers are connected to the rails R, which are laid in the tunnel.
It is mounted on trolley F that runs on R.

Reinforcing bars 50 are assembled on the floor of the tunnel, and a projection 51 is provided approximately at the center of the floor. Formwork 52 is erected on both sides of the floor to prepare for pouring concrete.

The feeder 1 is preferably provided with a rotary recycle spreader 2. This spreader spreads the concrete supplied by the belt conveyor 3 onto the floor, and is generally driven to rotate by a hydraulic motor. Further, sub-blades 4 are provided on both sides of the screw spreader 2 (left rear side in the figure). When passing the protrusion 51, the screw spreader 2 is lifted, but both sides of the protrusion are leveled by the sub-blade 4.

A rod-shaped vibrator 5 and a leveling machine 6 are provided behind the feeder 1 (as viewed in the direction of movement). Although the vibrator 5 is not shown in detail, it is equipped with four rods as shown in Fig. 2, and the entire body is moved vertically by a hydraulic cylinder and horizontally by hand. . Although it is vibrated by the vibration exciter 7, it is attached to the machine frame via vibration isolating rubber 8 so that harmful vibrations are not transmitted to the truck F.

The leveling machine 6 is used to level the concrete when the cart and therefore the feeder 1 travels on the rails.
As shown in FIGS. 2 and 3, the main body 9 in contact with the concrete C, the horizontal frame 10 from which the main body 9 is swingably suspended, and the level of the horizontal frame 10 can be adjusted. A pair of screws 11,1
1 and a screw 12 for adjusting the cant of the main body 9. Reference numeral 13 denotes a leveling machine which is separately provided to the main body 9, and is rotatably pulled up by a hydraulic cylinder 14 when the roadbed passes over a protrusion 51 on the roadbed.

Two laser light receiving plates 60, 60 are provided on the horizontal frame 10 at an interval. Then, the screen is activated by the signal detected by this light receiving plate.
11, 11 are rotated left and right, and the horizontal frame 10 is moved vertically guided by guides 15, 15. Similarly, the screw 12 is appropriately driven to adjust the cant. Note that these screws 11,1
2 is generally driven by a hydraulic motor.

Referring again to FIG. 1, a finisher 30 is constructed by mounting a finisher 31 on a truck F. The finisher 30 also has the same configuration as the feeder 1 in that the level and cant are adjusted. That is, as shown in FIGS. 4 and 5, the plate 32 in contact with the concrete, the frame 33 supporting the plate, the horizontal frame 35 suspending the frame with pins 34, and the level adjustment of the horizontal frame. A pair of screws 36, 36 for cant adjustment, screws 37 for cant adjustment, guides 38, 38, vibrator 39, 3
It consists of 9,39 mag. Note that reference numerals 40 and 40 in FIG. 4 indicate brackets for preventing shake.

The horizontal frame 35 of the finisher 30 is also provided with laser light receiving plates 61, 61. Then, as will be described later, the level and count are adjusted by detecting the laser beam reference plane and rotating the screws 36, 36 and 37 in appropriate directions. Note that semicircular notches 41, 41 are cut out in the plate 32.
is for escaping the protrusion 51 on the roadbed.

Next, a concrete placing method using a feeder and finisher will be established.

The cart F is moved to the right in FIG. 1 while spreading the concrete supplied by the belt conveyor 3 with the screw spreader 2. To prevent a gap from forming in the rod-shaped vibrator 5. Leveling machine 6
The cart, that is, the feeder 1 is run while leveling the surface. Similarly, finishing is performed using a finisher 30. At this time, the levels of the leveling machine and finishing machine are adjusted as follows.

The laser projector 70 is installed as shown in FIG. 9, and the laser level and slope are set. Accuracy is then checked using a laser rod 71 provided at the end of the construction section. In addition, the floodlight is 0~
It can rotate at 600rpm. The light projector 70 is rotated to form a laser beam reference plane 73, and the laser light receiving plates 60 and 61 receive light from this reference plane. The laser light receiving plates 60 and 61 are installed on the horizontal frame 10 or the horizontal frame 35 of the finisher 30 using the mounting holes 62 and 63, and are equipped with a large number of light receiving elements 64.
has. When the laser light receiving plates 60 and 61 receive the laser light, it is input to the amplifier 65, but the amplifier 65 has upper and lower limit values set for the laser light receiving position of the light receiving plate, and when the upper limit is exceeded, contact 1 is activated. The output is outputted to a solenoid valve (not shown), which drives a hydraulic motor, for example, to drive the screws 11, 11,
36, 36 are rotated to raise the leveling machine 6 (similarly, the finishing machine 31 is raised), and the laser light receiving plate to the light receiving plate is returned to within the set range.
Moreover, when it falls below the lower limit, it is output to contact 2 and lowered. The level is thus maintained between the upper and lower limits. The upper and lower limits of this set value can be changed arbitrarily. Note that when the signal is output to contact 3, an alarm is issued. In this way, prioritize and adjust the level, and then adjust the cant. Canting is performed by screws 12 and 37 for cant adjustment, and these screws are also driven by a hydraulic motor.
The operating principle of the contact output from the laser light receiving plate and amplifier and the hydraulic motor is the same as that for level adjustment. Note that if the rotation axis of the laser projector 70 is tilted to match the desired cant and the laser beam reference plane is tilted, cant adjustment is not necessary and only level adjustment is required, and the roadbed is composed of only straight lines. When constructing a section where the cant cant is adjusted, equipment such as a light receiving plate, amplifier, hydraulic motor, etc. for cant adjustment can be omitted.

As explained above, according to the present invention, concrete is leveled while running the leveling machine of the feeder and the finishing machine of the finisher, and furthermore, the level and cant are automatically adjusted using laser light. This makes concrete pouring work smoother and more efficient, and the leveling accuracy is also high.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the feeder and finisher, Fig. 2 is a side view of the leveling machine, Fig. 3 is a schematic diagram corresponding to the view seen from the arrow in Fig. 2, and Fig. 4 is a schematic perspective view of the feeder and finisher. 5 is a plan view of a plate of the finish machine, FIG. 6 is a front view showing an example of a laser beam receiving plate, FIGS. 7 and 8 are circuits, and FIG. The figure is an explanatory diagram showing a level adjustment method using laser light. 1... feeder, 6... leveling machine, 30...
Finisher, 31... Finisher machine, 60,
61... Laser light receiving plate, 70... Laser projector.

Claims (1)

[Claims] 1. While running a feeder having at least a leveling machine capable of level adjustment and cant adjustment, and a finisher having a finishing machine capable of level adjustment and cant adjustment, on a rail attached to the longitudinal direction of the tunnel, This is a construction method in which concrete supplied to the roadbed is spread with a screw spreader, leveled with the leveling machine, and finished flat with the finishing machine, and the leveling machine and finishing machine include a laser light receiving plate. On the other hand, a laser beam projector that can rotate the laser beam to create a reference plane is installed far from the roadbed, and this laser beam projector rotates the laser beam to create a horizontal or arbitrary plane within a predetermined distance. A laser beam reference plane formed with an inclination of A concrete pouring method for tunnel roadbeds, which is characterized by the following: