JP3526831B2 - Drainage culvert formation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a drainage underdrain in a highland such as a wetland.

[0002]

2. Description of the Related Art In order to improve the drainage performance of wetlands such as wetlands, a drainage culvert is used to form a culvert in the ground. The drainage culvert formation device is composed of an earth-cutting shank that is held vertically and a shell-shaped underdrain piercer provided at the lower end of the earth-cutting shank, and is used by attaching it to the rear part of a bulldozer or tractor. A drainage culvert is formed in the ground by moving a bulldozer etc. forward with the lower half of the earth cutting shank being thrust into the ground with the punching tool down and pulling the earth cutting shank horizontally.

Further, a porous water absorption pipe may be laid in the underdrain formed by advancing a shell-shaped underdrain perforator.
In this case, the tip of the perforated water absorption pipe is connected to the rear part of the underdrain perforator, and the perforated water suction pipe is drawn from the perforated water suction pipe supply device arranged at the underdrain formation start point into the underdrain by advancing the underdrain formation device. Method, a method of burying a plastic sheet in a culvert while making it circular with a molding machine, a method of filling a hydrophobic material such as rice husks while forming a culvert, a water absorbent pipe is laid while piercing the culvert and a hydrophobic material is filled. There is a method to do.

As a device used for such drainage underdrain formation work, there is a drainage underdrain formation device disclosed in Japanese Patent Laid-Open No. 56-156310. By using this drainage culvert formation device, a water absorption pipe can be laid while forming a drainage culvert in soil, and a gap between the drainage culvert and the water absorption pipe can be filled with a hydrophobic material.

In this conventional drainage culvert forming device, the rice husks filled in the drainage culvert as a hydrophobic material are housed in the hopper, and as the drainage culvert forming work progresses, the rice husks are sequentially fed out by the feeding device and subjected to a predetermined transfer. Since it is simply dropped into the drainage underdrain via the channel, the rice husks are not continuously fed into the drainage underdrain, and the rice can be clogged or interrupted in the middle of the transportation route. Therefore, rice husks may not be sufficiently filled in the drainage underdrain, and uneven filling or cavities may occur.

If the filling of the rice husks into the drainage underdrain is incomplete in this way, the function as the drainage underdrain is deteriorated and the desired drainage effect cannot be obtained.

In order to solve such a problem, the present applicant has previously used an earth-cutting shank held vertically and a shell-shaped underdrain perforator provided at the lower end of the earth-cutting shank by a pulling means. In a device that pulls horizontally to form a drainage culvert in the ground, and also fills the drainage culvert with the hydrophobic material fed through the hydrophobic material transport path provided in the earth cutting shank and the culvert perforator. , Proposed and applied for a drainage culvert formation device having a structure in which a gas flow generator for generating a gas flow by ejecting high-pressure gas supplied from a high-pressure gas generator into a tubular body is connected to a hydrophobic material transport path (special feature: Wish 2000-3
69130). According to this device, it is possible to provide a drainage culvert formation device capable of smoothly and reliably filling the hydrophobic material into the drainage culvert formed in the soil.

[0008]

However, in these conventional drainage culvert formation devices, the earth cutting shank is provided only at the rear part of the traveling device. Therefore, when forming a drainage culvert in a field with a spillway, the traveling device cannot run on the spillway, so the traveling device disconnects the soil cutting shank from the traveling device in front of the spillway, causing the traveling device to make a U-turn. The earth cutting shank was connected to the rear part, and the construction was performed with the traveling device backed.

When such a construction method is performed, there are the following problems. (1) Since it is necessary to make a U-turn of the traveling device, it takes a long time to work and the work efficiency is poor. (2) U-turn may be difficult in a narrow space. (3) When making a U-turn, it is difficult to align the traveling device for connecting the earth cutting shank.

The problem to be solved by the present invention is as follows.
It is an object of the present invention to provide a drainage culvert formation device capable of constructing a drainage culvert in a field without making a U-turn even if there is a spillway.

[0011]

In order to solve the above-mentioned problems, a drainage culvert forming device of the present invention comprises an earth cutting shank detachably fixed to a fixing device provided in a traveling device.
A drainage culvert forming device for forming a drainage culvert in the ground by horizontally pulling the soil crushing shank with the traveling device, comprising a shell-shaped underdrain perforation tool provided at the lower end of the soil cutting shank, The fixing device is installed at a front portion and a rear portion of the traveling device.

In the drainage culvert forming device having such a structure, since the fixing device for the soil cutting shank is provided at the front part and the rear part of the traveling device, the soil cutting shank is fixed at the rear part of the traveling device up to the front of the ridge. After cutting the soil cutting shank from the traveling device in front of the ridge, move the traveling device back straight, connect the soil cutting shank at the front of the traveling device, and move the traveling device forward from there. Depending on the situation, it will be constructed up to the road.

In this drainage underdrain forming device, the underdrain perforator is provided with means for laying a water absorption pipe in the drainage underdrain at the same time when the drainage underdrain is formed by the traveling of the traveling device, thereby effectively performing the drainage to the outside of the field. Simultaneous construction of water absorption pipes.

Further, the hydrophobic material supplied from the traveling device is laid in the drainage culvert (the water absorption pipe is laid in the drainage culvert through the soil material cutting shank and the hydrophobic material conveying path provided in the culvert piercing tool). During the operation, a means for filling the inside of the drainage culvert and the outside of the water absorption pipe) is provided to smoothly supply the hydrophobic material into the drainage culvert.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the examples shown in the drawings. FIG. 1 is a side view showing a usage state of a drainage culvert forming apparatus according to an embodiment of the present invention, FIG. 2 is a rear view of the drainage culvert forming apparatus shown in FIG. 1, and FIG. 3 is a sectional view of the formed drainage culvert. 4 is an enlarged view of the earth cutting shank portion in this embodiment, (a) is a side view,
(B) is a front view, (c) is a plan view, (d) is a BB cross-sectional view in (a), (e) is CC in (a).
FIG. 5 is a sectional view, FIG. 5 is an enlarged view of the clamp in the present embodiment, (a) is a side view, (b) is a plan view, (c) is a front view, and (d) is A-A in (a). FIG.

Drainage culvert formation devices 1R and 1 of this embodiment
In F, the bulldozer 2 having the caterpillars 3 on both sides is used as a traveling vehicle, and is mounted in front of and behind the traveling vehicle. FIG. 1 shows the state of being attached to the rear part. In the state of FIG. 1, the drainage underdrain forming device 1R includes an earth cutting shank 11 held in a vertical state, and a shell-shaped underdrain perforation tool 12 provided at a lower end of the earth cutting shank 11.
A transport path 13 for a hydrophobic material provided in the earth-cutting shank 11 and the underdrain perforator 12, a high-pressure air generator 14, a hopper 16 for accommodating a rice husk 15 which is a hydrophobic material, and a hopper 1.
A gas flow generator 17 arranged in a communication state between the discharge port of 6 and the transport path 13, and an air supply pipe 18 for supplying high pressure air from the high pressure air generator 14 to the gas flow generator 17 is provided. It is provided.

At the bottom of the hopper 16, a stirring blade 19 for sending the rice husk 15 toward the gas flow generator 17 connected to the discharge port, and a motor 20 for rotatably driving the stirring blade 19 are arranged. As shown in FIG. 4, a horizontal tail-shaped earth pulling member 21 is provided on both side surfaces of the earth cutting shank 11.

The earth cutting shank 11 is fixed to the fixing device 22 by
It is gripped by a clamp 24 that is opened and closed by a cylinder 23. The clamp 24 is rotatably fixed to the fixing plate 22a of the fixing device 22 by a shaft 25 at its base end, and the intermediate portion is fixed by a pin 26 attached to the rod tip of the cylinder 23. The front end hook portion 24a of the clamp 24 has a collar portion 11a so that the collar portion 11a on the upper portion of the earth cutting shank 11 and the fixing plate 22a are closely attached.
Grasp the lower surface of a. In FIG. 4A, the left clamp 24 shown by the solid line shows the state in which the collar portion 11a is gripped, and the right clamp 24 shown by the solid line shows the state in which the cylinder 23 is contracted to open the collar portion 11a. 27 in the figure
Is a packing provided to prevent air leakage in the transport path 13 of the hydrophobic material when the earth cutting shank 11 is gripped.

The fixing device 22 and the body of the bulldozer 2 are
They are connected by a parallel link 28 and are driven up and down by a lifting cylinder 29.

The fixing device 22 having the above-described structure is also provided at the front part of the bulldozer 2, but the hopper 16 is provided only at the rear part, and the rice husk 15 is provided by the air supply pipe 18 to the front part of the fixing device 22. It is supplied to the transport path. The supply of rice husks to the front and rear fixing devices 22 can be switched by operating the switching valve.

Next, a drainage underdrain construction method using the apparatus of the present invention will be described. First, as shown in FIG.
Soil cut shank 1 on the fixing device 22 at the rear of the bulldozer 2.
1 with the underdrain piercing tool 12 facing down and the lower half of the soil cutting shank 11 being pushed against the ground 30, the bulldozer 2 is advanced to form a drainage underdrain 31 in the ground 30. At the same time, the rice husk 15 fed from the hopper 16 through the gas flow generator 17 and the transport path 13 is filled in the drainage underdrain 31. FIG. 3 is a cross-sectional view of a portion of the formed drainage culvert 31.

When this work is performed up to the front of the winding road and the bulldozer 2 reaches a position where it cannot be further advanced (it may be a position before that), as shown in FIG. 6A, the clamp 24 of the rear fixing device 22 is used. Remove the shredded shank 1
While keeping 1 left in the ground, straighten back the bulldozer 2 and cut the soil shank 1 under the front fixing device 22.
The bulldozer 2 is stopped when the heads of 1 match, and
As shown in (b), the fixing device 22 is lowered to clamp and fix the earth cutting shank 11. Then bulldozer 2
By moving forward, the work with the earth cutting shank 11 is continued, and as shown in FIG. 6C, the drainage underdrain 31 can be formed up to the work groove 33 before the spillway 32.

Next, another construction method using the bulldozer 2 equipped with the drainage culvert formation devices 1R, 1F of the present invention will be described with reference to FIG. 7A is a side view showing the present construction method, FIG. 7B is an enlarged view of a main part, and FIG. 7C is an enlarged sectional view of a drainage culvert.

In this construction method, a connecting member 40 is provided behind the bullet-shaped underdrain perforator 12, and the drainage underdrain 3 is provided.
Water absorption pipe feeder 4 arranged near the formation start end 31S of No. 1
The tip of the water absorption pipe 42 pulled out from No. 1 is a connecting aid 43.
It is connected to the connecting member 40 via.

Therefore, the earth cutting shank 11 is moved forward to lay the water suction pipe 42 in the drainage underdrain 31 formed by the underdrain perforator 12, while the gas flow generator 17 (not shown) and the transfer path 13 are provided. It is possible to fill the gap between the water absorption pipe 42 and the drainage culvert 31 with the rice husks 15 fed via the husks.

Also in this construction method, when the bulldozer 2 reaches the front of the spillway, the earth cutting shank 11 is removed from the fixing device 22 of the drainage underdrain forming device 1R at the rear part, and the bulldozer 2 is backed and the drainage underdrain device at the front part is removed. By fixing the soil cutting shank 11 to the fixing device 22 of 1F and advancing the bulldozer 2, the drainage underdrain 31 can be excavated up to the work groove 33 of the bank.

[0027]

The present invention has the following effects. (1) By installing the fixing device for the soil cutting shank at the front part and the rear part of the traveling vehicle, after separating the soil cutting shank attached to the rear part, the traveling device is linearly backed to remove the soil on the front part. By fixing the soil cutting shank with the cutting shank fixing device and advancing the traveling device, a drainage culvert can be constructed up to the spillway. (2) Since it is only necessary to linearly back the traveling device without making a U-turn, construction can be performed in a short time, and construction in a narrow place can be performed easily. (3) Since the traveling device is simply moved back linearly, the soil cutting shank and the fixing device can be easily aligned with each other, and the work efficiency is improved. (4) The work of pulling the shell-shaped underdrain perforator to form the drainage underdrain while laying the water absorption pipe in the drainage underdrain can be performed smoothly and surely.

[Brief description of drawings]

FIG. 1 is a side view showing a usage state of a drainage culvert forming apparatus according to an embodiment of the present invention.

FIG. 2 is a rear view of the drainage culvert formation device shown in FIG.

FIG. 3 is a sectional view of the formed drainage culvert.

FIG. 4 is an enlarged view of an earth cutting shank portion in the present embodiment, in which (a) is a side view, (b) is a front view, (c) is a plan view, and (d) is B- in FIG. B sectional view,
(E) is CC sectional drawing in (a) figure.

FIG. 5 is an enlarged view of a clamp according to the present embodiment,
(A) is a side view, (b) is a plan view, (c) is a front view,
(D) is AA sectional drawing of (a) figure.

FIG. 6 is a process drawing showing a construction method according to the present invention.

FIG. 7 shows another construction method by the traveling device equipped with the drainage underdrainage forming device of the present invention, (a) is a side view showing the construction method, (b) is an enlarged view of a main part, and (c). [Fig. 3] is an enlarged cross-sectional view of a drainage culvert.

[Explanation of symbols]

1F Front drainage culvert formation device 1R Rear drainage culvert formation device 2 Bulldozer (travel device) 3 caterpillar 11 earth cutting shank 11a Tsuba part 12 Underdrain perforator 13 Transport path 14 High pressure air generator 15 Rice husk (hydrophobic material) 16 hoppers 17 Gas flow generator 18 Air line 19 stirring blades 20 motor 21 Earth gathering member 22 Fixing device 22a Fixed plate 23 cylinders 24 clamps 24a hook part 25 axes 26 pin 27 packing 28 parallel links 29 Lifting cylinder 30 ground 31 drainage culvert 31S formation start end 32 ridge 33 Working groove 40 Connection member 41 Water suction pipe feeder 42 Water absorption pipe 43 Connection aid

Claims (3)

(57) [Claims] 1. An earthmoving shank removably fixed to a fixing device provided on a traveling device, and a shell-shaped underdrain perforation tool provided at a lower end of the earthmoving shank. In a drainage culvert forming device that horizontally pulls a soil cutting shank to form a drainage culvert in the ground, the fixing device is installed at a front part and a rear part of the traveling device , and
The height of the upper surface of the earth cutting shank during the underdrain perforation is
A drainage culvert formation device having a height that allows a traveling device to pass through . 2. The drainage culvert forming device according to claim 1, wherein the drainage culvert is provided with means for laying a water absorption pipe in the drainage culvert at the same time when the drainage culvert is formed by the traveling of the traveling device. 3. The hydrophobic material supplied from the traveling device,
The drainage culvert forming apparatus according to claim 1 or 2, further comprising means for filling the drainage culvert through a hydrophobic material conveying path provided in the earth cutting shank and the culvert piercing tool.