JPH0823141B2 - Road surface excavation method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road surface excavation method for efficiently laying pipes for sewerage or underdrain.

[0002]

2. Description of the Related Art When burying conventional sewers or pipes for underdrain, a road surface 41 to be laid as shown in FIG.
After performing a predetermined excavation with a backhoe 49 or the like, the excavated portion is earth-retained with a wood sheet pile 43, and the pipes 45 are centered with a water thread.

By the way, in the conventional method of inserting the pipes 45 into the open / closed portion, usually 10 m to 30 m
In addition to excavating as a span, retaining the wood sheet pile 43, setting the pipes 45 in the excavated portion with a rail-type trench, and laying the pipes 45 while guiding them with water thread was the mainstream. .

The procedure is as follows: first excavate a distance of about 10 to 30 m with a heavy machine such as a backhoe 49, then put a manhole cylinder 47 connecting the pipes 45 at a predetermined position on the road 41, and then take out a stake. A method has been adopted in which a water thread is struck on the pipe diameter with a nail and the height is raised by a pipe core placed in the center. Then, a predetermined number of pipes 45 of about 2 to 4 m are arranged and laid while measuring the height and the gradient in the length direction by the level and the transit, and the soil generated at the excavated portion is dump truck 51 or the like. It was necessary to dispose of it by the transportation means. Then, the earth and sand for backfilling are transported to the rear part of the excavated portion by the dump truck 51 to backfill the pipes 45.

[0005]

As described above, the work of laying pipes for sewerage requires a long excavation and extension, and it is necessary to transport the generated soil or the earth and sand for backfilling, which requires site management and safety. There are problems in terms of transportation and traffic. Therefore, making it possible to construct these pipes in a short period of time, reducing the number of personnel and shortening the construction period, etc. will help to build a long extension of the sewer system at a low unit price and raise the penetration rate in Japan. it is conceivable that.

However, in the above-mentioned conventional example, when burying the pipes 45, the height and the gradient in the length direction must be checked each time by the level and the transit, and the length on the road is considerably long. The heavy equipment such as the backhoe 49 and the dump truck 51 must be sequentially moved for the excavation work, the treatment of the generated soil, the backfilling, and the like in the state of occupying the entire area.

Further, when constructing a predetermined length, it is necessary to carry out the tensioning a predetermined number of times depending on the number of pipes 45 to be laid, which is a very troublesome work.

A device as shown in Japanese Utility Model Publication No. 61-174762 (laser oscillator supporting device) is used.
Even in the case of laying pipes for sewerage, simply installing the target at the pipe end has the same problem as the above-mentioned conventional example.

The present invention solves the above-mentioned drawbacks of the conventional example, can shorten the length of excavation during the laying work of pipes, and is very convenient in terms of site management, safety, traffic problems, etc. Moreover, it is intended to provide a road surface excavation method that can be constructed in a short period of time.

[0010]

That is, according to the road surface cutting method of the present invention, a distance corresponding to the length of one pipe is cut on the road surface by a cutting machine, and the pipes 1 are cut on the cut portion.
Dirt the length of the book and lay the pipes, measure the slope with a laser measuring instrument installed inside the pipes, perform the excavation work while illuminating the excavated part with the laser light for measurement, Further, it is characterized in that the steps of backfilling the excavated portion with the excavating machine are sequentially repeated.

[0011]

Since the road surface excavation method of the present invention is constructed as described above, it is possible to shorten the excavation extension in the laying work of pipes. That is, the length of one pipe is excavated on the road surface, the pipe is laid on this, and the pipe is installed at a predetermined slope. And the place where this pipe was laid can be immediately backfilled by using the earth and sand etc. which was excavated before.
At this time, since the laser beam illuminates the next excavation position, the excavation work for the next one can be performed easily and accurately.

Therefore, there is a remarkable effect that it is very convenient in terms of site management, safety, traffic problems, etc. and can be installed in a short period of time.

Also, when constructing a predetermined length, it is possible to omit the number of times of staking according to the number of pipes to be laid, and the work can be performed quickly.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the road surface excavation method of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 1 is a road surface on which a sewer pipe is to be laid. This road surface 1 is cut by a cutting machine such as a backhoe 5 at a distance corresponding to the length of one pipe 3. The pipe 3 is usually made of PVC pipe or other material. That is, as shown in FIG. 3, after the road surface 1 is cut by the backhoe 5, the pipe 3 is buried, and the distance for one pipe 3 is cut and cut.
Immediately after the burial is completed, backfilling will be performed.
The dump truck 6 carries the generated soil at that time,
Almost all can be backfilled by the backhoe 5. Note that the pipe 3 is laid while the side wall of this excavated portion is retained by the box-shaped trench 7 for one length of the pipe 3.

In the pipe 3, as shown in FIG. 4, a box-shaped trench 7 having a backhoe 5 mounted thereon is advanced over the excavated portion, and the pipe 3 of, for example, 3 m held by the box-shaped trench 7 is sunk in the excavated portion. It is laid by inserting it.

The gradient of the pipe 3 is as shown in FIG.
It is measured by a laser measuring device 9 installed inside. This laser measuring instrument 9 does not need to move the installation location for each pipe 3, and once installed, the gradient of a predetermined length (for many pipes) can be measured at the same position.

FIG. 5 shows a target formed on the end surface of the pipe 3 when the laser measuring instrument 9 is used. In the figure (a), a transparent film 13 on which a target 11 indicating a tube core is printed is attached to the end surface of the pipe 3 so that the laser measuring instrument 9 can be aimed and the inflow of water or mud can be prevented. It has become. In the figure, (b) shows that at least four grooves 15 are formed on the end surface of the pipe 3, and the grooves 15 are positioned on the line passing through the pipe core. Therefore, if a water thread or a straight scale is put in the groove 15, the laser measuring instrument 9 can be aimed. Further, (c) in the figure is a target 11 showing a pipe core on the end face of the pipe 3.
The target plate 17 with holes is fitted into the plate. 19 is a handle provided on the target plate 17,
Reference numeral 21 is a stopper attached to the end of the pipe 3. Then, the target 11 is formed on the end surface of the pipe 3 by any one of the above means, and the laser measuring device 9 is aimed at to measure the gradient of the pipe 3.

After installation of the pipe 3 is completed, the excavated portion is backfilled with an excavating machine such as the backhoe 5. This backfill is performed immediately after the installation of one pipe 3 is completed. The feature of the present application is that the excavation of one pipe 3, installation of the pipe 3, measurement of the gradient, and backfilling are sequentially repeated.

FIG. 6 shows another embodiment of the present invention, showing that it can be applied to the construction of U-shaped groove and box culvert in the same manner. That is, the length of one U-shaped groove 31 is cut by the backhoe 5, and the laser measuring device 9
The U-shaped groove 31 is laid while watching the slope.

In the above description, FIGS. 7 (a), (b),
As shown in (c), U-shaped groove 31 and box culvert 35,
A predetermined mark 33 is provided on the inner surface of the pipe 3, and a swingable laser measuring device 9 set in a manhole or a laying object is swung by a predetermined angle along the mark 33, so that a tension or a water thread can be obtained. It is possible to easily perform the laying work while looking at the slope without repeating the work of stretching. Since the laser measuring device 9 is used in the present invention, it is also possible to form the mark 33 on the manhole and see the gradient. From the above-mentioned viewpoint, it is desirable that the pipes applied to the present invention have a predetermined mark formed on the inner wall in the longitudinal direction.

Since the laser light emitted from the laser measuring instrument 9 illuminates the excavated portion where the excavation work is being performed, the excavation work can be carried out very quickly by excavating with the backhoe 5 while aiming at this. be able to. As a matter of course, this laser light is even more effective in the nighttime excavation work.

[0023]

Since the road surface excavation method of the present invention is constructed as described above, it is possible to shorten the excavation extension in the laying work of pipes. That is, the length of one pipe is excavated on the road surface, the pipe is laid on this, and the pipe is installed at a predetermined slope. And the place where this pipe was laid,
It can be backfilled immediately by using the earth and sand excavated before. At this time, since the laser beam illuminates the next excavation position, the excavation work for the next one can be performed easily and accurately.

Therefore, there is a remarkable effect that it is very convenient in terms of site management, safety, traffic problems, etc. and can be installed in a short period of time.

Also, when constructing a predetermined length, it is possible to omit the number of times of staking according to the number of pipes to be laid, and the work can be performed quickly.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a road surface excavation method of the present invention.

FIG. 2 is a schematic view showing a usage state of a backhoe.

FIG. 3 is a cross-sectional view showing the relationship with the road surface at that time.

FIG. 4 is a plan view showing a usage state of a trench.

FIG. 5 is a schematic view showing an example of a target formed on an end surface of a pipe.

FIG. 6 is a schematic view showing another embodiment.

FIG. 7 is a perspective view showing a state in which a mark is formed on the inner surface of the laid object.

FIG. 8 is a schematic view showing a conventional example.

[Explanation of symbols]

 1 Road surface 3 Pipe 5 Backhoe 6 Dump truck 7 Box-type trench 9 Laser measuring instrument 11 Target 13 Transparent film 15 Groove 17 Target plate 19 Handle 21 Stopper 31 U-shaped groove 33 Mark

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location E03F 3/06 F16L 1/024 1/038

Claims (1)

[Claims] 1. A digging machine is used to excavate a distance corresponding to the length of one laying pipe (3) on the road surface (1), and soil retention of the length of one pipe (3) is sewn to this excavating part. with laying pipe (3) s, measured by a laser measuring instrument installed a gradient in the pipe (3) s (9), measured
Perform the excavation work while illuminating the excavated part with the regular laser light.
There, and the road surface digging method being characterized in that so as to sequentially repeat the step of backfilling the excavation section above digging machine.