JPH1056802A - Preparation of levee and apparatus for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for preparing a levee, by which the levee capable of surely preventing water from leaking and preventing weed from growing is readily prepared by repairing an old levee, and fitting and stably installing a levee material on the repaired old levee and further to provide an apparatus for the method. SOLUTION: This method for preparing a levee comprises a step for successively forming a positioning groove C along one side edge of the top part B of an old levee in the width direction by a colter for forming a top groove and simultaneously cutting and evenly leveling the top part B of the old levee A, a step for successively forming a burying groove E at the foot of the levee by cutting the soil at the foot of the levee D continuing to the other side edge of the top part B of the old levee A in the width direction by a colter and allowing the apparatus to progress while removing the soil by a plow knife of a plow, a step for fitting and installing a levee material 6 having an engaged fragment 36 for being engaged to the positioning groove C and a buried fragment 38 for being buried in the burying groove E, and a step for burying the buried fragment 38 of the levee material 6 in the burying groove E by returning the removed soil to the burying groove E.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ridge construction method for repairing an old ridge and constructing the ridge, and to a ridge construction device for implementing the ridge construction method.

[0002]

2. Description of the Related Art In recent years, the shortage of agricultural workers and the aging of agricultural workers have led to a situation in which water management in paddy fields, which is basic in rice cultivation, cannot be sufficiently performed. What is important in this water management is the prevention of water leakage from the ridge, but the mowing work of weeds growing on the ridge is also important. For this reason, conventionally, as a measure to prevent water leakage and to treat weeds after harvesting rice or before planting rice, ridge painting work has been carried out to apply mud to the old ridge and restore the old ridge. The furrowing work requires a lot of labor, and it is not easy to perform the furrowing work every year in the current situation of the agricultural workers.

[0003]

Therefore, recently, a ridge construction material has been installed to make a ridge, and a ridge made of the ridge construction material has been used as a measure for preventing water leakage and for treating weeds. It is conceivable to reduce the labor of the levee work performed by the workers every year. However, in order to use the ridge construction material as a ridge, much labor is required to install the ridge creation material, that is, it is necessary to install the ridge construction material in the ridge creation section of the field. It requires labor to dig up mud to width and depth to maintain the levee base, which is not an easy task for farmers at present.

[0004] The present invention has been made in view of the above points, and a ridge construction method for stably installing ridge construction materials on an old ridge and a ridge construction method used for implementing the ridge construction method. It is intended to provide a device.

[0005]

According to a first aspect of the present invention, there is provided a method of forming a ridge along a widthwise side edge of a top of an old ridge. Cutting and removing the soil at the skirt hem that is continuous with the other side edge in the width direction of the top to sequentially form an embedding groove in the skirt hem; A step of fitting and installing a ridge having a mating engagement piece and a buried piece embedded in the buried groove, and burying the removed soil in the buried groove to bury the buried piece of the ridge. And embedding.

Then, a step of forming a positioning groove at one side edge of the top of the old ridge in the width direction, a step of forming a buried groove at a skirt of the old ridge, and a step of forming a ridge on the old ridge. And a step of burying the buried piece of the ridge in the buried groove, thereby forming a ridge using the ridge construction material. In this way, water leakage is prevented on the constructed ridge, and weeds are prevented from growing on the ridge.

According to a second aspect of the present invention, there is provided a ridge formation device that is rotatably provided on a machine frame and forms a positioning groove along one side edge in the width direction of the top of the old ridge. A skirt groove forming body that cuts and removes soil of a ridge hem portion provided on a frame and is continuous with the other side edge in the width direction of the top of the old ridge and forms an embedding groove in the ridge hem portion, and the positioning. And a ridge body having an engaging piece that engages with the groove and a burying piece buried in the buried groove, the ridge body being fitted to and installed on the old ridge.

[0008] A positioning groove is formed in the top groove forming body along one side edge in the width direction of the top of the old ridge, and the other side in the width direction of the top of the old ridge is formed in the hem groove forming body. The soil at the foot of the ridge that continues to the edge is cut and removed, and a buried groove is formed at the foot of the ridge. In addition, the ridge body is fitted on the old ridge, the engaging piece of the ridge body is engaged with the positioning groove, and the embedded piece of the ridge body is set in the embedding groove and buried. Ridges are constructed.

[0009] The ridge preparation device according to claim 3 is provided by claim 2.
In the above described ridge preparation device, the top groove forming body has a terrain body that cuts off the top of the old ridge to level the ground flat. Then, when the positioning groove is formed by the top groove forming body, the top of the old ridge is cut and leveled by the leveling body.

[0010] The ridge preparation device according to the fourth aspect is the second aspect.
In the above described ridge formation device, the skirt groove forming body has a rotatable coulter for cutting a skirt portion of the old ridge and a soil excluding body provided at the rear of the coulter. . Then, the skirt hem of the old ridge is cut by the coulter, and this cut soil is removed to the side by the elimination body, and a buried groove of a predetermined width and depth is formed in the skirt hem. It is formed.

According to a fifth aspect of the present invention, there is provided a ridge preparation device according to the fourth aspect.
In the above described ridge preparation device, the soil removal body is a plow having a plow spatula that scoops up the soil cut by the coulter and removes the soil laterally in the traveling direction. Then, the soil cut by the coulter by the plow spatula of the plow is scooped up and removed to the side in the traveling direction, and a buried groove having a predetermined width and depth is formed at the skirt of the ridge.

[0012] The ridge preparation device according to claim 6 is the second embodiment.
In the above described ridge preparation device, the skirt groove forming body is formed of a rotatable spiral blade body which cuts a skirt portion of the old ridge and pushes up the cut soil upward while removing it sideways. It is. Then, the skirt hem of the old ridge is cut by the spiral blade body, and the cut soil is removed to the side while being pushed upward, and the skirt has a predetermined width and depth. Buried trenches are formed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 4, reference numeral 1 denotes a ridge creation device. This ridge creation device 1 is provided with a machine frame 2 and a widthwise direction of a top B of an old ridge A provided rotatably on the machine frame 2. A top groove forming body 3 that forms a positioning groove C along one side edge of the ridge, and a ridge hem that is provided in the machine frame 2 and that is continuous with the other side edge in the width direction of the top B of the old ridge A. The soil of D is cut and removed, and a skirt groove forming body 4 that forms a buried groove E in the ridge hem D and a top B of the old ridge A that is connected to the top groove forming body 3 are cut. It has a leveling body 5 for leveling flat and a ridge body 6 to be fitted and installed on the old ridge A.

Next, the machine frame 2 has a main frame 7 in the form of a hollow pipe extending in the left-right direction, and a transmission device having an input shaft 8 rotatably projecting forward at an intermediate portion of the main frame 7. 9
A lower arm 11 having a lower pin 10 at a tip end is provided on both sides of the main frame 7 so as to be opposed to each other and integrally protrude forward and downward. .

A top arm 13 having a connecting portion 12 at the tip thereof is integrally and protruded forward and upward from the upper portion of the transmission device 9. The top arm 13 is opposed to the lower arms 11 on both sides. It is supported via a support piece 14.

An up-down transmission case 15 is integrally fixed to one end of the main frame 7, and a bracket 16 inclined downward and rearward is integrally fixed to the other end of the main frame 7. At the lower end of the bracket 16, a disk-shaped thrust receiver 17 that advances while cutting the cultivated soil is rotatably mounted on a support shaft 18.

Next, at the lower end of the transmission case 15, the top groove forming body 3 and the ground leveling body 5 are coaxially rotatably mounted, respectively. That is, the top groove forming body 3 and the terrain body 5 have a coaxial left and right rotation axis 19, and the rotation axis 19 is located above the top B of the old ridge A and is horizontally disposed. In this state, it is rotatably mounted on the lower end of the transmission case 15 in a cantilever manner.

The top groove forming body 3 is fixed to the outer end of the rotating shaft 19, and is located between the top groove forming body 3 and the lower end of the transmission case 15. Is fixed to the grounding body 5.

The top groove forming body 3 is a top B of the old ridge A.
And a disc-shaped top groove forming coulter 20 which cuts and forms a positioning groove C along one side edge in the width direction of FIG. Also,
The leveling body 5 includes a spiral blade body 21 that cuts the top B of the old ridge A to level the ground and removes the cut soil toward the side in the traveling direction.

An output end of an output shaft 22 of the transmission device 9 projects into an upper end of the transmission case 15,
An endless chain 25 is provided between a sprocket 23 fixed to an output end of the output shaft 22 and a sprocket 24 fixed to a protruding end of the rotary shaft 19 protruding into a lower end of the transmission case 15. The output shaft 22 is rotatably suspended, and is rotatably inserted into and supported by the main frame 7.

The output shaft 22 of the transmission 9
The rotation shaft 19 is driven to rotate by the output from the endless chain 25 via the endless chain 25, and the top groove forming coulter 20 of the top groove forming body 3 and the spiral blade body of the leveling body 5 are rotated by the rotation shaft 19.
21 are rotated along the top B of the old ridge A.

Next, the main frame 7 is separated from the power transmission case 15 by a distance from the rear to the lower side.
An upper end of a support frame 27 disposed in parallel with the bracket 16 having the thrust receiver 17 is connected to the connection frame 26, and a lower end of the support frame 27 is connected to the left and right directions. The support shaft 28 is mounted horizontally,
On both sides of the support shaft 28, a pair of coulters 29 for cutting the soil at the skirt portion D at a predetermined interval, which is continuous with the other side edge in the width direction of the top B of the old ridge A, respectively rotate. It is freely mounted on a shaft.

A mounting frame 30 is integrally fixed to the support frame 27 in a rearward and downward direction, and a lower end portion of the mounting frame 30 is located rearward between the pair of coulters 29 and is provided with the pair of coulters. A soil removing body 31 for removing the soil cut at 29 to the side in the traveling direction is attached.
The soil removing body 31 is composed of a plow bed 32, a plow spatula 33 and a plow body 34 having a plow tip 33a. And the pair of coulters
29 and the plow 34 constitute the skirt groove forming body 4.

Next, as shown in FIG. 1 (b) and FIG. 4, the ridge body 6 includes a horizontal ridge top plate 35 having a predetermined length covering the top B of the old ridge A. An engaging piece 36 which is integrally protruded downward from one end in the width direction of the ridge upper plate 35 and engages with the positioning groove C, and extends downward from the other end in the width direction of the ridge upper plate 35. Ridge side plate protruding with the slope
37 and a buried piece projecting vertically downward from the lower end of the ridge side plate 37 and abutting against the side wall F of the buried groove E.
38 and are integrally formed.

At one end of the ridge body 6 in the length direction, an engagement protrusion 6a is formed integrally with one end edge of the ridge upper plate 35, the engagement piece 36, the ridge side plate 37, and the embedding piece 38. It is projected.
An engagement recess for engaging an engagement protrusion 6a formed at one end of another ridge 6 at the other end of the ridge 6 in the longitudinal direction.
6b is continuously formed integrally with the ridge upper plate 35, the engagement piece 36, the ridge side plate 37, and the other end edge of the embedding piece 38.

The ridge body 6 is integrally formed of a synthetic resin or the like having a strong weather resistance against ultraviolet rays and a high chemical resistance against fertilizers and agricultural chemicals. The upper surface of the ridge upper plate 35 is formed with a knurl for preventing slippage, an uneven pattern, and the like. When the necessary number of the ridges 6 are set on the old ridge A according to the length of the old ridge A, the opposing end faces thereof are joined and connected to each other. ing.

Next, the operation of the above embodiment will be described.

The three-point connection part (the left and right lower pins 10 and the connection part 12) provided on the machine frame 2 of the ridge building device 1 is connected to the three-point connection part of the tractor, and the power transmission shaft is connected to the PTO shaft of the tractor. The input shaft 8 of the mission device 9 is connected via the transmission. In addition, the top groove forming body 3 and the leveling body 5 of the ridge creation device 1 are arranged on the old ridge A, and the hem groove forming member 4 of the ridge creation device 1 is attached to the ridge D of the old ridge A. To place.

Further, when the ridge-building device 1 is towed by the tractor and the input shaft 8 of the transmission device 9 is rotated by the PTO shaft of the tractor via the power transmission shaft, the transmission device 9 is driven by the tractor. Interlocked media (sprockets 23, 24 and endless chain 25) by output from output shaft 22
, The top groove forming body 3 and the leveling body 5 of the rotating shaft 19, that is, the top groove forming coulter 20 and the spiral blade body 21 respectively rotate along the top B of the old ridge A. Be advanced.

As shown in FIG. 1 (a), the width of the former ridge A is relatively narrow at a predetermined depth along one lateral edge of the top B of the old ridge A at the top groove forming coulter 20, as shown in FIG. Vertical positioning grooves C are sequentially formed, and the old ridge A
Is cut and leveled on a flat ground b. The cutting soil cut by the spiral blade body 21 is the spiral blade body.
Eliminated in 21 spiral directions.

Further, as the ridge creation device 1 is towed forward, the colters 29 on both sides rotate along the skirt D of the old ridge A, and the old ridges are formed by the colters 29 on both sides. The soil at the skirt portion D of the shore A is sequentially vertically cut to a predetermined depth and cut. Further, the soil between the cut grooves cut by the coulter 29 on both sides is cut substantially horizontally at the tip of the plow bed 33a at the tip of the plow bed 32, and the plow tip 33a is set at the plow spatula 33.
From the soil is sequentially scooped up.

Then, as shown in FIG.
A buried groove E having a vertical side wall F is formed at a predetermined depth and width on the side of the old ridge A on the ridge D of the old ridge A in the plow 34 having the plow spatula 33. In addition, this plow spatula 33
The cut soil scooped up in the above is gradually removed by the plow spatula 33 toward the side in the traveling direction, that is, as back soil S on the cultivated soil G on the side of the buried groove E.

Further, a positioning groove C is sequentially formed along one lateral edge of the top B of the old ridge A in the width direction, and the top B of the old ridge A is flattened by the spiral blade 21. When the land is leveled on the ground level b and the buried groove E is sequentially formed on the ridge D of the old ridge A, the thrust receiver 17 rotates and cuts the cultivated soil G to advance. In the receiver 17, the top groove forming coulter 20 and the spiral blade 21 and the coulters 29 and the plows 34 on both sides are advanced along the old ridge A without lateral movement.

Therefore, positioning grooves C are sequentially formed on the top B of the old ridge A on one side edge in the width direction of the flat ground b, and a vertical ridge D is formed on the skirt D of the old ridge A. A buried groove E having a side wall F is sequentially formed.

Next, as shown in FIG.
When the required number of ridges 6 are fitted along the length of the old ridge A, the ridge plate 35 of each ridge 6 is placed on the leveling surface b of the top B of the old ridge A. It is installed, and each engaging piece 36 is inserted from above into the positioning groove C of the top B of the old ridge A and engaged therewith, and each ridge side plate 37 is joined to the inclined side surface of the old ridge A, Each buried piece 38 is joined to the vertical side wall F of the buried groove E, and the lower end is inserted into the bottom of the buried groove E. Therefore, each ridge body 6 is the old ridge A
It is installed with good stability.

Each of the ridges 6 sequentially installed on the old ridge A along the longitudinal direction of the old ridge A is provided with each of the engaging projections 6a in each of the engaging recesses 6b opposed to each other. Are respectively engaged and connected, so that each ridge body 6 fitted on the old ridge A is connected in series. Therefore, the old ridge A is restored over the entire length of each ridge 6.

Next, as shown in FIG. 1 (b), the embedding pieces 38 of each levee body 6 are respectively inserted into the embedding grooves E into which the embedding pieces 38 have been inserted. By carrying back the back soil H and backfilling, the buried pieces 38 of each ridge 6 are buried in the backfill soil H, and the backfill soil H is backfilled to the height of the surface of the cultivated soil G. Level the ground.

Therefore, the engaging piece 36 of each ridge 6 is engaged with and supported by the positioning groove C, and each of the embedded
38 is supported by the backfill soil H backfilled in the buried trench E, and the ridge top plate 35 is supported on the leveled ground b at the top B of the old ridge A, so that each ridge body 6 The ridges having a predetermined height are easily supported without being easily tilted by treading pressure and the like, and each ridge 6 is a molded body, and the old ridge A is restored to a state in which it is difficult to collapse. Built on Bank I.

Further, the buried piece 38 of each ridge body 6 is installed at the bottom in the buried groove E, so that the buried piece 38 blocks back soil H, and one of the buried pieces 38 is provided. Water is prevented from leaking from one side to the other. Also, the old ridge A is covered with the ridge upper plate 35, the ridge side plate 37, and the buried piece 38 of each ridge body 6, so that weeds and the like are covered on the upper surface and side surfaces of the ridge I covered by these. It is prevented from growing.

Next, in the above embodiment, the case where the skirt groove forming body 4 is constituted by the coulters 29 and the plows 34 on both sides has been described. However, the present invention is not limited to this. Alternatively, it may be constituted by a vertically rotatable spiral blade body 39 which cuts the skirt portion D of the old ridge A and pushes the cut soil upward while removing the soil sideways.

In this case, as shown in FIGS. 5 and 6, a gear box 40 is provided at the rear of one side of the main frame 7 inside the top groove forming body 3, and a lower end of the gear box 40 is provided. A support frame 41 is integrally fixed to the support frame 41, and a vertical rotation shaft 42 is rotatably mounted on the support frame 41, and a lower portion of the support frame 41 is provided around the rotation shaft 42 from a lower end of the rotation shaft 42. The helical blade 43 is fixed in a spiral shape.

The support frame 41 covers the upper part of the spiral blade 43, and has a guide body 45 having a discharge port 44 for removing cutting soil pushed up by the spiral blade 43 to the side in the traveling direction. Is fixed. The lower end of the rotary shaft 42 has a cutting blade plate 46 continuous with the lower end of the spiral blade 43,
The upper end of 42 is linked to the output shaft 22 of the transmission 9 by a gear mechanism 47 having a bevel gear provided in the gear box 40. Further, a top groove forming coulter as the top groove forming body 3 is located near the outer end of the output shaft 22.
20 is linked to rotate freely.

Then, the rotary shaft 42, the spiral blade 43, the discharge port
The spiral blade body 39 is formed by a guide body 45 having a 44 and a cutting blade plate 46.
Is configured. The other configuration is the same as that of the above-described embodiment, and the corresponding configuration is denoted by the reference numeral used in the above-described embodiment, and the description is omitted.

With this construction, the output shaft 22 of the transmission device 9 causes the rotating shaft 42 to sequentially advance while being rotated via the top groove forming coulter 20 and the gear mechanism 47, respectively. As shown in FIG. 7 (a), positioning grooves C are sequentially formed along one side edge in the width direction of the top B of the old ridge A.

Further, the skirt portion D of the old ridge A is advanced while being sequentially cut by the spiral blade 43 of the rotary shaft 42 and the cutting blade plate 46, and the cut soil is formed along the spiral of the spiral blade 43. And is pushed upward, and is sequentially removed from the discharge port 44 of the guide body 45 toward the side in the traveling direction. Then, as shown in FIG. 7A, a buried groove E having a predetermined depth at the bottom is formed in the skirt portion D of the old ridge A by the spiral blade body 39 in order.

As shown in FIG. 7 (b), a required number of ridges 6 are covered on the old ridge A on which the positioning grooves C and the buried grooves E are formed in the same manner as in the above embodiment. By burying the buried piece 38 of each ridge 6 in the buried soil H back buried in the buried groove E, water leakage was prevented and the growth of weeds was prevented. The ridge I restored to the state is created.

Further, in the above-described embodiment, the case where the buried groove E is formed in the skirt hem portion D located below the inclined side surface of the old ridge A has been described. When forming the buried groove E in the skirt hem D, a substantially horizontal step K having a vertical wall surface J between the inclined side surface of the old ridge A and the vertical side wall F of the buried groove E To form
The substantially horizontal stepped portion K having the vertical wall surface J may be covered with the ridge body 6 which is fitted and installed on the old ridge A.

In this case, as shown in FIG. 8, the levee body 6 has a vertical plate portion 48 abutting on the vertical wall surface J between the inclined ridge side plate 37 and the buried piece 38 and the substantially horizontal portion. Step K
The horizontal plate parts 49 installed on the upper part are respectively formed. Other configurations are the same as those in the above embodiment.

With this configuration, the ridge I which has been repaired in a state where the old ridge A is prevented from leaking water and the weeds are prevented from growing at each ridge 6 is constructed.
The horizontal plate portions 49 of the ridges 6 are also buried in the backfill soil H, and the ridges 6 are filled with the backfill soil H.
Is stably held in a state of being fitted on the old ridge A.

[0051]

According to the first aspect of the present invention, the step of forming a positioning groove along one widthwise edge of the top of the old ridge, and the other widthwise edge of the top of the old ridge. Forming a buried groove in the skirt hem part continuous with the part, and fitting and installing a ridge body having an engaging piece engaging with the positioning groove and a buried piece embedded in the buried groove on the old ridge. By a series of steps including a process and a step of burying the buried piece of the ridge by backfilling the soil removed in the buried trench, the ridge is stably installed on the old ridge and securely held With this ridge body, the old ridge can be easily formed into a ridge that can reliably prevent water leakage and prevent the growth of weeds.

The ridge is constructed using the ridge body so that it does not easily collapse even when being treaded, and the levee painting and mowing work can be performed like a ridge in which mud is solidified. It is possible to obtain a durable ridge that can maintain and manage water in paddy fields without the need for labor.

According to the second aspect of the present invention, when installing the ridge in the ridge construction method according to the first aspect, the positioning groove for engaging the engaging piece of the ridge with the old ridge. The ridge can be reliably formed along one side edge in the width direction of the top of the ridge, and the buried groove for burying the buried piece of the ridge can be reliably formed in the skirt of the old ridge. Therefore, the old ridge which covers and installs the ridge by mechanical means can be easily maintained, and the labor of the agricultural worker can be greatly reduced. It is possible to provide a ridge preparation device that is preferable for implementing the method.

According to the third aspect of the present invention, the top of the old ridge can be easily and flatly leveled with the leveling body, and the flat ridge is fitted on the old ridge on the ridge. The plate can be supported in a stable state.

According to the fourth aspect of the present invention, the skirt portion of the old ridge can be vertically cut by the coulter and the cut soil can be reliably removed by the soil removing body. An embedding groove of a predetermined depth for embedding the embedding piece of the ridge body can be formed in the skirt portion of the old ridge in an orderly manner.

According to the fifth aspect of the present invention, it is possible to reliably remove the cut soil cut by the coulter with the plow spatula of the plow body toward the side in the traveling direction. An embedding groove of a predetermined depth for embedding the embedding piece of the ridge body in the hem portion can be formed in an orderly manner.

According to the invention of claim 6, while cutting the skirt portion of the old ridge with the spiral blade, the cut soil can be reliably removed to the side in the traveling direction.
With a simple structure without using a coulter, a buried groove of a predetermined depth for burying the buried piece of the ridge can be reliably formed in the ridge of the old ridge.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a ridge creation process according to an embodiment of the present invention. FIG. 1 (a) shows a state in which a positioning groove is formed at the top of an old ridge and a buried groove is formed at a skirt of the old ridge. b) is an explanatory view of a state in which a ridge body has been set up on the old ridge and buried pieces have been buried to create the ridge.

FIG. 2 is a side view of the ridge preparation device according to the embodiment of the present invention.

FIG. 3 is a rear view of the same.

FIG. 4 is a perspective view of the ridge body.

FIG. 5 is a side view of a ridge preparation device according to another embodiment.

FIG. 6 is a rear view of the same.

Fig. 7 shows the above-mentioned ridge creation process. (A) shows a state in which a positioning groove is formed at the top of the old ridge and a buried groove is formed at the skirt of the old ridge. It is explanatory drawing of the state which installed the ridge body, buried the buried piece, and created the ridge.

FIG. 8 is a view showing still another ridge creation step, in which a ridge body is set on an old ridge and buried pieces are buried to create a ridge.

[Explanation of symbols]

 2 Machine frame 3 Top groove forming body 4 Hem groove forming body 5 Leveling body 6 Levee body 29 Coulter 31 Soil elimination body 33 Plow spatula 34 Plow body 36 Engagement piece 38 Buried piece 39 Spiral blade body A Old ridge B Top C Positioning groove D Leve hem E Embed groove H Backfill soil I Leve

Claims (6)

[Claims] 1. A step of sequentially forming a positioning groove along one side edge in the width direction of the top of the old ridge, and a skirt hem continuous with the other side edge in the width direction of the top of the old ridge. Forming a buried groove in the foot of the ridge by cutting while removing the soil of the ridge, and an engaging piece that engages with the positioning groove in the old ridge and a buried piece that is buried in the buried groove. A step of fitting and embedding a ridge having ridges, and a step of burying the removed soil in the embedding groove to bury a buried piece of the ridge. Bank construction method. 2. A top groove forming body rotatably provided on the machine frame and forming a positioning groove along one side edge in the width direction of the top of the old ridge, and a top groove forming body provided on the machine frame. A skirt groove forming body that cuts out and removes the soil of the ridge hem portion that is continuous with the other side edge portion in the width direction of the top and forms an embedding groove in the ridge hem portion, an engagement piece that engages with the positioning groove, and A ridge body having a buried piece buried in the buried groove, and a ridge body fitted and installed on the old ridge. 3. The levee development device according to claim 2, wherein the top groove forming body has a leveling body that cuts off the top of the old ridge to level the ground. 4. The skirt groove forming body has a rotatable colter that cuts a skirt hem of an old ridge, and a soil removing body provided behind the corter. Item 4. The ridge preparation device according to item 2. 5. The levee ridge formation according to claim 4, wherein the soil removal body comprises a plow having a plow spatula that scoops up the soil cut by the coulter and removes the soil laterally in the traveling direction. apparatus. 6. The skirt groove forming body comprises a rotatable helical blade body which cuts a skirt portion of an old ridge and removes the cut soil sideways while pushing up the cut soil upward. The ridge preparation device according to claim 2, wherein