JP2010281204A - Mole drain forming method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mole drain forming method capable of efficiently and uniformly inputting and filling a hydrophobic material in the mole drain simultaneously when forming the mole drain, capable of forming the mole drain superior in drainage performance and capable of forming the mole drain at a distal end position of the mole drain forming, for example, a position very adjacent to a levee. <P>SOLUTION: A mole drain forming device is provided with a working machine mounting part 12 for mounting and supporting on an earth removing plate 32 at a front part of bulldozer 31, a hydrophobic material hopper 13 integrally arranged at the working machine mounting part, a hydrophobic material input part 14 conjuncted at the lower part of the hydrophobic material hopper, a blade part 15 for groove forming blade arranged at forward in the projectile culvert excavation direction of the hydrophobic material input part, a hydrophobic material input port 16 arranged at rear and lower part in the projectile culvert excavation direction of the hydrophobic material input part and a projectile 17 arranged at rear in the projectile culvert excavation direction from the hydrophobic material input port. By advance of the bulldozer 31 and up and down move of the earth removing plate 32, a mole drain 56 having a projectile part 52 in which the hydrophobic material does not exists at the bottom of the groove part input and filled with the hydrophobic material. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bullet culvert forming method, and more particularly, a bullet culvert installed for drainage in a wetland, particularly for forming a bullet culvert filled with a hydrophobic material such as chaff in the bullet culvert. The present invention relates to a bullet culvert formation method.

  Conventionally, a so-called bullet culvert forming apparatus is known as an apparatus for forming drainage culverts on poorly drained land. In this bullet culvert forming device, for example, a bullet culvert is formed in the ground by pulling with a bulldozer or the like in a state where a chisel (soil incision portion) provided with a bullet at the lower end is advanced into the ground. (For example, refer to Patent Document 1). In addition, in culvert drainage work where a culvert drainage pipe is laid in the groove, a hydrophobic material is used to form a permeable layer such as pebbles and rice husks to a predetermined depth in the groove above the culvert drainage pipe in order to improve drainage performance. After the introduction, topsoil is put on the hydrophobic material to refill the grooves.

Japanese Patent Publication No. 60-17894

  Therefore, even in a bullet culvert, it is possible to improve drainage performance by putting a hydrophobic material such as chaff into the culvert. However, a normal bullet culvert has a groove above the bullet section. Since the width was narrow, it was extremely difficult to introduce a hydrophobic material into the groove. In addition, the hydrophobic material is generally put into the groove from the bag, and the actual situation is that most of the work depends on manual work. For this reason, it is difficult to spread the hydrophobic material uniformly, and the input amount (depth) is uneven, or the hydrophobic material is wasted. Furthermore, if the hydrophobic material is densely filled to the bottom of the bullet culvert, the drainage performance of the bullet culvert may be impaired.

  Therefore, the present invention is capable of efficiently and uniformly performing the introduction and filling of the hydrophobic material into the bullet culvert and simultaneously with the formation of the bullet culvert, and further can form a bullet culvert with excellent drainage performance, It is another object of the present invention to provide a bullet culvert forming method capable of forming a bullet culvert to a bullet culvert formation end position, for example, to the vicinity of the shore.

In order to achieve the above object, a bullet culvert forming method of the present invention includes a work implement mounting portion that is mounted and supported on a soil discharge plate provided in a front portion of a bulldozer so as to be movable in the vertical direction, and the work implement mounting portion. A hydrophobic material hopper provided integrally with the hydrophobic material hopper, a hydrophobic material input portion connected to the lower portion of the hydrophobic material hopper, and a blade portion for groove formation provided in front of the bullet culvert excavation direction of the hydrophobic material input portion A bullet culvert forming device provided with a hydrophobic material input port provided at the rear lower part of the bullet culvert excavation direction of the hydrophobic material input portion, and a bullet provided at the rear of the bullet culvert excavation direction from the hydrophobic material input port In the method of forming a culvert, the bulldozer with the earthen plate raised is positioned on the near side of the bullet culvert excavation direction from the formation start position of the bullet culvert, the bulldozer is advanced and the earthen plate is lowered to advance the bulldozer. Hydrophobic material Insert the insertion part, blade part, hydrophobic material inlet and bullet into the ground, and excavate the groove part at the tip of the blade part by the advance of the bulldozer and the lowering of the earth discharging plate, and at the bottom of the groove part While forming a bullet portion by bullets, the lower part of the bullet culvert forming device is entered into the ground, and when the blade portion is inserted into the ground to a depth corresponding to the depth of the bullet culvert to be formed, The lowering of the earth discharge plate is stopped, the hydrophobic material is introduced into the hydrophobic material hopper, and the bulldozer is advanced to excavate and form a groove in the blade portion, and the hydrophobic material from the hydrophobic material hopper The hydrophobic material that has fallen into the insertion portion is introduced into the lower portion of the groove portion through the hydrophobic material introduction port, and the bottom of the groove portion and the lower portion of the hydrophobic material are moved by the bullets that advance from the rear of the hydrophobic material introduction port. When the bullet culvert forming device arrives at the bullet culvert forming end position, a bullet culvert having a bullet portion where no hydrophobic material is present is formed at the bottom of the groove portion charged and filled with the hydrophobic material. After stopping, the earth discharging plate is raised, and the hydrophobic material feeding part, the blade part and the bullet are pulled out from the ground.

  According to the bullet culvert forming method of the present invention, the bullet culvert forming apparatus can be pushed to the bullet culvert formation end position, for example, near the shore of the culvert, so that the bullet culvert can be formed to a position very close to the shore of the culvert. . Moreover, a moderate water gradient can be given to a bullet culvert by advancing a bulldozer while raising a soil removal board moderately. Furthermore, since a bullet culvert having a bullet portion where the hydrophobic material is not substantially present is formed at the bottom of the groove portion charged and filled with the hydrophobic material, water that has flowed into the bullet culvert from the ground or the ground is discharged from the groove portion to the bullet portion. It is possible to promptly flow out to the culvert drainage pipe or drainage channel, and the drainage performance in the bullet culvert can be greatly improved.

It is a front view which shows one example of a bullet culvert formation apparatus used for the bullet culvert formation method of this invention. It is a top view of a bullet culvert forming apparatus. It is a side view of a bullet culvert forming apparatus as seen from the front of the bullet culvert excavation direction. It is a side view of a bullet culvert forming device, also viewed from the rear. It is a front view which shows the state at the time of a bullet culvert excavation start when the bullet culvert formation apparatus is mounted | worn with the earth discharging board of a bulldozer which shows one form example of the bullet culvert formation method of this invention. Similarly, it is the side view seen from the bullet culvert excavation direction front. Similarly, it is a front view which shows the state during a bullet culvert excavation. Similarly, it is a front view which shows the state at the time of completion | finish of a bullet culvert excavation. It is sectional drawing which shows one example of a bullet culvert. It is a longitudinal cross-sectional view which shows an example of the interruption | blocking means which controls the fall of a hydrophobic material. It is sectional drawing which shows the example which formed the bullet culvert at the edge of the field cropping land adjacent to the paddy field. It is a top view which shows the example of mounting | wearing of the bullet culvert formation apparatus to the earth discharging board of a bulldozer. It is sectional drawing which shows one example of the bullet culvert which injected the soil hardening agent into the surrounding wall of a bullet part. It is a front view of the principal part which shows an example of the bullet culvert formation apparatus which provided the soil hardening | curing agent injection | pouring nozzle. It is a front view of the principal part which shows the other example of the bullet culvert formation apparatus which provided the soil hardening | curing agent injection | pouring nozzle. It is a front view of the principal part which shows the further another example of the bullet culvert formation apparatus which provided the soil hardening | curing agent injection | pouring nozzle. It is a side view of the principal part which shows the form example which provided the hopper for hydrophobic material replenishment. It is a front view of the principal part similarly.

  1 to 4 show an example of a bullet culvert forming apparatus used in the bullet culvert forming method of the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. FIG. 4 is a side view seen from the rear side. The bullet culvert forming apparatus 11 includes a work machine mounting portion 12 that is mounted and supported on an elevating member of a work machine, which will be described later, a hydrophobic material hopper 13 provided integrally with the work machine mounting portion 12, and the hydrophobic material hopper 13, a hydrophobic material input part 14 provided continuously to the lower part, a blade forming blade part 15 provided in front of the bullet culvert excavation direction of the hydrophobic material input part 14, and a bullet culvert excavation direction of the hydrophobic material input part 14 Hydrophobic material inlet 16 provided at the lower rear, bullet 17 provided behind the hydrophobic material inlet 16 in the direction of excavation of the bullet culvert, and insertion amount of the hydrophobic material inlet 14 and blade 15 into the ground And a guide plate 18 that regulates the above.

  The work implement mounting portion 12 and the hydrophobic material hopper 13 are provided on a lifting member provided directly or indirectly on a work implement on which the bullet culvert forming apparatus 11 is mounted or a traveling body that is pushed or pulled by the work implement. An appropriate fixing structure such as locking, engaging, fitting, fitting, bolting, etc. can be adopted as the mounting structure to the lifting member. . Further, the working machine and the bullet culvert forming device 11 may be integrally configured as a dedicated machine. However, the working machine and the bullet culvert forming apparatus 11 are usually formed so as to be detachably attachable to a general-purpose working machine such as a bulldozer or tractor. Is desirable.

  Furthermore, the position of the elevating member in the work implement can be any of the forward direction front side and the forward direction rear side of the work implement, and can be selected according to the performance of the work implement. For example, in the case of a bulldozer, the earth removal plate is provided in a state that can be raised and lowered at the front part, and since it is formed to push the earth and sand with the earth removal plate when moving forward, this earth removal plate is used as an elevating member. By utilizing and mounting the bullet culvert forming device 11 on the earth discharging plate, the characteristics of the bulldozer can be used effectively.

  The hydrophobic material hopper 13 can be formed in an arbitrary shape and volume according to the amount of the hydrophobic material to be charged, but it is an amount for one step when forming a bullet culvert, for example, the length of the bullet culvert is several tens of meters The volume of the hydrophobic material can be charged, and the angle of the inner surface of the side wall is set to an inclination angle equal to or greater than the angle of repose of the injected hydrophobic material. The entire amount of the hydrophobic material can be reliably dropped into the lower hydrophobic material charging portion 14 without being clogged in the middle.

  The hydrophobic material charging part 14 has a width corresponding to the width dimension of the groove part in the bullet culvert and has a sufficient length in the front-rear direction in the bullet culvert excavation direction. The groove shape is stabilized by pressing. The blade portion 15 provided in front of the hydrophobic material charging portion 14 sharpens the tip portion of the bullet culvert excavation direction, and directs the plate-like body inclined downward in the bullet culvert excavation direction in the vertical direction. The rear end of the blade portion 15 is formed to have the same width as the hydrophobic material charging portion 14. Further, the blade portion 15 is formed to be longer than the lower end of the hydrophobic material charging portion 14 and excavates a groove having a depth including a portion through which the bullet 17 positioned below the hydrophobic material charging portion 14 passes. Yes.

  The hydrophobic material inlet 16 is opened obliquely so that the rear side in the bullet culvert excavation direction rises so that the hydrophobic material can be smoothly introduced into the groove from the hydrophobic material inlet 14 through the hydrophobic material inlet 16. Yes. The vertical dimension of the hydrophobic material inlet 16 can be set appropriately, but generally the filling height of the hydrophobic material is 25-30 cm when the depth of the bullet culvert is about 40 cm. Should be set.

  The bullet 17 has a diameter larger than the width dimension of the hydrophobic material charging part 14 and is connected to the lower end of the blade part 15 via a chain 19 so that the groove bottom after the hydrophobic material is charged has a cross-sectional view. It is formed to expand in a circular shape. The bullet 17 can be connected to the blade portion 15 with the chain 19, or an appropriate arm can be used, or can be connected to the lower portion of the hydrophobic material charging portion 14. It is preferable to connect using a connecting tool having flexibility such as a chain so that an excessive force is not applied to the portion 15 and the like.

  The guide plate 18 is provided as a guide for the height position of the bullet culvert forming apparatus 11 when forming the bullet culvert, and reliably prevents the formed bullet culvert from being formed too deeply. . The guide plate 18 may be provided as necessary depending on conditions such as the construction of the working machine and the lifting member, and may be detachable.

  FIGS. 5 to 9 show an embodiment of the method of the present invention in which a bullet culvert is formed by attaching a bullet culvert forming device to a bulldozer discharge plate as an elevating member. FIG. 6 is a side view seen from the front side of the bullet culvert excavation direction, FIG. 7 is a front view showing a state during the excavation of the bullet culvert, and FIG. 8 is a front view showing the state at the end of the bullet culvert excavation. It is. Moreover, FIG. 9 is sectional drawing which shows one example of a bullet culvert.

  The bullet culvert forming apparatus 11 is attached to the earth removing plate 32 of the bulldozer 31 via the work machine attaching portion 12, and is fixed to the front of the earth removing plate 32 by a fixing bolt (not shown). The bulldozer 31 with the bullet culvert forming device 11 mounted and supported travels with the earth removal plate 32 raised and the blade portion 15 and the bullet 17 lifted to the ground, and the front side of the bullet culvert excavation direction from the start position of the formation of the bullet culvert. To be located.

  Next, the bulldozer 31 is moved forward and the earth removal plate 32 is lowered to insert the hydrophobic material charging part 14, the blade part 15, the hydrophobic material charging port 16 and the bullet 17 of the bullet culvert forming apparatus 11 into the ground. As a result, as shown in FIG. 5, the lower part of the bullet culvert forming device 11 excavates the groove 51 at the tip of the blade portion 15 by the advance of the bulldozer 31 and the lowering of the earth removal plate 32, and the bottom of the groove 51 It gradually enters the ground while forming a bullet section 52 having a circular cross section by the bullet 17. When the hydrophobic material charging part 14 and the blade part 15 are inserted into the ground to a depth corresponding to the depth of the bullet culvert to be formed, the lowering of the earth discharging plate 32 is stopped. Normally, the bullet culvert formation start position is the position of the culvert drainage groove 54 in which the culvert drainage pipe 53 is embedded. Therefore, the bulldozer 31 is temporarily stopped in front of the culvert drainage groove 54, and a chaff or the like is placed in the hydrophobic material hopper 13. A predetermined amount of hydrophobic material is added. As the hydrophobic material, rice husks are optimal in Tabata and the like, but pebbles and the like can also be used.

  Then, as shown in FIG. 7, the bulldozer 31 is advanced to form the excavation so that the blade portion 15 expands the groove portion 51 having a predetermined depth and width, and the hydrophobic material is introduced from the hydrophobic material hopper 13. The hydrophobic material 55 dropped on the portion 14 is introduced into the lower portion of the groove portion 51 through the hydrophobic material introduction port 16. As a result, the hydrophobic material 55 in the groove 51 is filled to a height substantially corresponding to the vertical dimension of the hydrophobic material inlet 16. Subsequently, when the bullet 17 advances from the rear through the bottom of the groove 51, the bottom of the groove 51 and the lower part of the hydrophobic material 55 are expanded, and after passing through the bullet 17, a bullet substantially free of hydrophobic material is present. Thus, a bullet culvert 56 having a bullet portion 52 in which the hydrophobic material 55 does not substantially exist is formed at the bottom of the groove portion 51 in which the hydrophobic material 55 is charged and filled.

  When the bullet culvert forming device 11 reaches the bullet culvert formation end position, for example, in the vicinity of the ridge 57 as shown in FIG. 8, the bulldozer 31 is first stopped, and then the earth discharging plate 32 is raised to make it hydrophobic. The material input part 14, the blade part 15, and the bullet 17 are pulled out from the ground. At this time, since the bullet culvert forming apparatus 11 can be pushed closer to the shore 57, the bullet culvert 56 can be formed to a position very close to the shore 57. In addition, by setting the amount of the hydrophobic material to be injected into the hydrophobic material hopper 13 to an amount corresponding to the length of the bullet culvert 56, the required amount can be filled into the groove 51 and dropped to the ground before and after the formation of the bullet culvert. The amount of hydrophobic material to be reduced can be minimized. Furthermore, an appropriate water gradient can be given to the bullet culvert 56 by advancing the bulldozer 31 while appropriately raising the earth removal plate 32.

  As shown in FIG. 9, the bullet culvert 56 formed as described above has a shape having a bullet portion 52 where the hydrophobic material 55 does not exist at the bottom of the groove portion 51 filled with the hydrophobic material 55. Therefore, compared with a conventional bullet culvert filled with a hydrophobic material as in the prior art, the water flow performance at the bottom of the groove is greatly improved. Therefore, the water that has flowed into the bullet culvert 56 from the ground or from the ground is discharged from the groove 51 into the bullet. Through the part 52, it can be quickly discharged to the underdrain drainage pipe 53 and the drainage channel, and the drainage performance in the bullet underdrain can be greatly improved.

  Further, as shown in the longitudinal sectional view of FIG. 10, a blocking means 21 that restricts the dropping of the hydrophobic material from the hydrophobic material hopper 13 to the hydrophobic material charging portion 14 between the hydrophobic material hopper 13 and the hydrophobic material charging portion 14. Can also be provided. The shielding means 21 is formed of a large diameter pipe portion 22 and a small diameter pipe 23 inserted into the large diameter pipe portion 22 so as to be rotatable coaxially. The large-diameter pipe portion 22 has an upper communication port 24 that communicates with the lower portion of the hydrophobic material hopper 13 and a lower communication port 25 that communicates with the upper portion of the hydrophobic material charging portion 14. The small-diameter pipe 23 is composed of a tube body whose outer diameter is the same as or slightly smaller than the inner diameter of the large-diameter pipe section 22, and includes an upper opening 26 corresponding to the upper communication port 24 of the large-diameter pipe section 22, and a lower section A lower opening 27 corresponding to the communication port 25 is provided. Further, an operating member (not shown) such as a lever protrudes from the end or side wall of the large-diameter pipe portion 22 in the small-diameter pipe 23, and the small-diameter pipe 23 is made large by operating this operating member. It is formed so that it can be rotated in the radial tube portion 22.

  Therefore, in a state where the hydrophobic material is put into the hydrophobic material hopper 13, as shown in FIG. 10, the upper opening 26 and the lower opening 27 correspond to the upper communication port 24 and the lower communication port 25, respectively. By rotating the small-diameter tube 23, the hydrophobic material can be dropped from the hydrophobic material hopper 13 to the hydrophobic material charging portion 14, and the hydrophobic material can be charged into the bullet culvert 56. Further, by rotating the small diameter tube 23 so as to cover the upper communication port 24 and the lower communication port 25 with the tube wall of the small diameter tube 23, the falling of the hydrophobic material from the hydrophobic material hopper 13 to the hydrophobic material charging portion 14 is blocked. can do. The structure of the shielding means is arbitrary, and the plate-like member may be rotated or slid to open and close between the hydrophobic material hopper 13 and the hydrophobic material charging portion 14. The blocking means 21 does not need to completely partition the passage between the hydrophobic material hopper 13 and the hydrophobic material charging portion 14, and the hydrophobic material can be prevented from dropping only by narrowing the passage.

  FIG. 11 is a cross-sectional view showing an example in which a bullet culvert is formed at the edge of a field crop (advertising field) adjacent to a paddy field. In the field cropping land 72 adjacent to the paddy field 71, the paddy field 71 is often in a muddy state and may adversely affect field crops. Conventionally, a groove having a certain width and depth has been formed on the vineyard 73 side of the shore 73 that divides the paddy field 71 and the field cultivated land 72. However, when such a groove is formed, There is a problem of soil treatment at the time of formation, and when returning to the paddy field, it is necessary to prepare soil for backfilling. In addition, mowing in the groove is also necessary. Furthermore, when returning to the paddy field, the backfilled groove portion is soft, so that there is a problem that the tractor or the rice transplanter travels.

  In such a case, by forming the bullet culvert 56 as described above along the ridge 73 at the edge of the field crop field 72, the permeated water from the paddy field 71 is discharged into the drainage channel or the like by the bullet culvert 56. Since the water can be drained, it is possible to prevent the permeated water from entering the field cropland 72 and becoming muddy. In this case, even if the field crop 72 is located at a position lower than the paddy field 71 by forming the bullet culvert 56 having the bullet part 52 where the hydrophobic material 55 does not exist at the bottom of the groove part 51 filled with the hydrophobic material 55, the paddy field The permeated water from 71 can be surely excluded.

  Further, no soil processing problems occur as compared with the conventional groove formation, and no special mowing is required. Furthermore, when returning the field crop field 72 formed with the bullet culvert 56 to the paddy field, the bullet culvert 56 may be left as it is, and only the drainage channel side end portion may be closed to suppress the outflow of water. There is no problem.

  Thus, when a bullet culvert is formed on the edge of the field crop field 72 or paddy field along the shoreline, as shown in the plan view of FIG. 12, a bullet culvert is formed at the end of the earth removal plate 32 of the bulldozer 31. By mounting the forming device 11, the bullet culvert 56 can be formed in the immediate vicinity of the shore. Although a guide plate may be provided, if a guide plate is not provided at least on the shore side, a bullet culvert can be formed at a position closer to the shore.

  Further, when the bullet culvert forming device 11 is mounted on the bulldozer 31, the bullet culvert 56 can be formed up to the vicinity of the ridge in the direction orthogonal to the traveling direction as described above. A culvert 56 can be formed, and the bullet culvert 56 in the direction along the shoreline 73 in two or three directions in the field crop field 72 adjacent to the paddy field 71 or waterway in two or three directions can be made continuous at the corner. It is possible, and drainage can be further improved.

  Furthermore, as shown in FIG. 13, when forming a bullet culvert 56 having a bullet portion 52 in which the hydrophobic material 55 does not exist at the bottom of the groove portion 51 filled with the hydrophobic material 55, a soil hardening agent is formed on the peripheral wall of the bullet portion 52. By injecting 81, the durability of the bullet portion 52 can be improved. The injection of the soil hardening agent 81 can be performed as shown in the front view of the main part shown in FIGS.

  First, FIG. 14 shows an example in which a soil hardener injection nozzle 82 for injecting a soil hardener 81 into the groove is provided below the hydrophobic material charging portion, behind the blade portion 15 and in front of the bullet 17. Show. The soil hardener injection nozzle 82 is connected via a pipe 83 to a soil hardener supply means (not shown) provided in the upper part of the bullet culvert forming apparatus 11 or in the working machine. The soil hardener 81 is injected into the groove by means according to its properties. For example, when the soil hardener 81 is in a liquid or slurry form, the soil hardener 81 is naturally flowed or pumped by a pump. An appropriate amount can be injected into the groove.

  The soil hardening agent 81 injected in front of the bullet 17 is pressed into the ground around the bullet portion 52 as the bullet 17 advances, and the peripheral wall of the bullet portion 52 is solidified by the soil hardening agent 81.

  FIG. 15 shows an example in which an internal flow path 84 for passing the soil hardener 81 is provided inside the bullet 17 and a plurality of ejection nozzles 85 for radially ejecting the soil hardener 81 are provided at the rear of the bullet 17. ing. The soil hardening agent 81 ejected from the ejection nozzle 85 is injected into the ground around the bullet portion 52 by the spray output. Further, in this example, an auxiliary bullet 86 for pressurizing the soil hardening agent is provided behind the ejection nozzle 85, and the soil hardening agent 81 ejected from the ejection nozzle 85 is reliably inserted into the ground around the bullet portion 52 by the auxiliary bullet 86. While injecting, the bullet 52 can be shaped into a predetermined shape.

  In FIG. 16, an internal flow path 87 for passing the soil hardener 81 is provided inside the bullet 17, and a second bullet 89 for pressurizing the soil hardener using a connecting tool 88 such as a chain behind the bullet 17. This shows an example in which The soil hardening agent 81 is injected into the bullet portion 52 from the nozzle portion that is opened at the rear end of the bullet 17 through the flow path 87, and is injected into the ground around the bullet portion 52 by the rear second bullet 89. At the same time, the bullet portion 52 is shaped by the second bullet 89.

  Various kinds of soil hardening agent 81 can be used as long as they do not adversely affect crops such as rice. For example, a soil hardening agent mainly composed of light-burned magnesia and soluble phosphate fertilizer or carbonate. (Product surface: Mug white) can be suitably used.

  17 and 18 show an example in which a hydrophobic material replenishing hopper is provided. FIG. 17 is a side view of the main part, and FIG. 18 is a front view of the main part. In this embodiment, a hydrophobic material replenishing hopper 91 and a conveying means 92 for feeding the hydrophobic material 55 in the hydrophobic material replenishing hopper 91 into the hydrophobic material hopper 13 are provided on the upper part of the hydrophobic material hopper 13. An example is shown. The hydrophobic material replenishment hopper 91 has a larger volume than the hydrophobic material hopper 13 and is usually set so as to store a sufficient amount of the hydrophobic material 55 to form a long-distance bullet culvert. ing.

  The conveying means 92 conveys the hydrophobic material 55 in the hydrophobic material replenishing hopper 91 to the upper portion of the hydrophobic material hopper 13, and a belt conveyor or a screw conveyor can be used. Further, by linking the operation of the conveying means 92 with the operation of forming the bullet culvert, the hydrophobic material 55 can be introduced only into the necessary portion. For example, the hydrophobic material 55 is prepared at the time of preparation for excavation start or at the end of excavation shown in FIG. By introducing the hydrophobic material 55 into the hydrophobic material hopper 13 only when the bullet culvert 56 is formed at a predetermined position as shown in FIG. 7 without introducing the hydrophobic material 55 into the hopper 13, wasteful consumption of the hydrophobic material 55 is achieved. Can be suppressed.

  The hydrophobic material replenishment hopper 91 and the conveying means 92 may be formed integrally with each other, or may be formed separately and used in combination. In addition, the bulldozer can be attached to the earth discharging plate 32 or to the tractor by producing an appropriate attachment, which can be attached to a predetermined position by any method. Furthermore, the drive of the conveying means can use power or hydraulic pressure supplied from the working machine, and a generator or the like can be prepared separately.

  DESCRIPTION OF SYMBOLS 11 ... Bullet culvert formation apparatus, 12 ... Working machine mounting part, 13 ... Hydrophobic material hopper, 14 ... Hydrophobic material input part, 15 ... Blade part, 16 ... Hydrophobic material input port, 17 ... Bullet, 18 ... Guide plate, 19 ... Chain 21, blocking means 22, large diameter pipe section 23, small diameter pipe 24, upper communication port, 25 lower communication port, 26 upper opening, 27 lower opening, 31 bulldozer, 32 earth removing plate 51 ... Groove, 52 ... Bullet, 53 ... Underdrain drainage pipe, 54 ... Underdrain drainage groove, 55 ... Hydrophobic material, 56 ... Bullet underdrain, 57 ... Underside, 71 ... Paddy field, 72 ... Upland crop, 73 ... Underground 81 ... Soil hardener, 82 ... Soil hardener injection nozzle, 83 ... Pipe, 84 ... Internal flow path, 85 ... Injection nozzle, 86 ... Auxiliary bullet, 87 ... Internal flow path, 88 ... Connector, 89 ... Secondary Bullet, 91 ... Hopper for supplying hydrophobic material, 92 ... Conveying means

Claims (1)

A work machine mounting portion that is mounted and supported on a discharge plate that is movably provided in the front portion of the bulldozer, a hydrophobic material hopper that is integrally provided in the work machine mounting portion, and the hydrophobic material hopper A hydrophobic material input portion continuously provided at the lower part of the first material, a groove forming blade portion provided in front of the bullet culvert excavation direction of the hydrophobic material input portion, and a rear portion of the hydrophobic material input portion in the rear direction of the bullet culvert excavation direction. In a method for forming a bullet culvert with a bullet culvert forming device comprising a hydrophobic material input port and a bullet provided behind the hydrophobic material input port in the direction of excavation of the bullet culvert, the earthen plate is raised. The bulldozer is positioned on the front side of the bullet culvert excavation direction from the bullet culvert formation start position, and the bulldozer is advanced and the earth removal plate is lowered to place the hydrophobic material charging portion, blade portion, hydrophobic material charging port and bullets in the ground. Insert inside As the bulldozer advances and the earth removal plate descends, a groove is excavated at the tip of the blade, and a bullet-shaped bullet is formed at the bottom of the groove. When the blade portion is inserted into the ground up to a depth corresponding to the depth of the bullet culvert to be formed, the lowering of the earth removal plate is stopped, and the hydrophobic material is put into the hydrophobic material hopper The groove portion is excavated and formed in the blade portion by advancing the bulldozer, and the groove portion is dropped from the hydrophobic material hopper into the hydrophobic material inlet portion through the hydrophobic material inlet port. The bottom of the groove part and the lower part of the hydrophobic material are expanded by the bullets that enter from the rear of the hydrophobic material inlet and the hydrophobic material is injected into the bottom of the groove part charged and filled with the hydrophobic material. A bullet culvert having a bullet portion that does not exist is formed, and when the bullet culvert forming device reaches the bullet culvert formation end position, the bulldozer is stopped, and then the soil discharge plate is raised to input the hydrophobic material A bullet culvert forming method, wherein a part, a blade part and a bullet are pulled out from the ground.

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