JP6786444B2 - Soil removal jig and soil removal method - Google Patents

Description

The present invention relates to a soil removal jig and a soil removal method for a portion surrounded by a steel pipe sheet pile and a steel pipe joint.

Conventionally, when constructing marine structures, etc., steel pipe sheet piles are driven into the ground underwater to install steel pipe wells, and earth and sand inside the wells are excavated using a clam shell or the like and discharged to the outside. .. However, when excavating the inside of the well with a clam shell or the like, it is not possible to completely remove the earth and sand on the peripheral surface of the steel pipe sheet pile, especially in the vicinity of the steel pipe joint for connecting the steel pipe sheet piles. Sediment that cannot be completely removed during this excavation is generally called a clay spatula. Therefore, in order to remove the soil slabs remaining near the steel pipe sheet pile wall surface and the steel pipe joints, manual excavation by a diver, excavation using a soil slab removal jig, and excavation using a water stream such as a water jet are performed. ..

As a jig used for removing soil, a guide device is provided in the middle of the longitudinal direction of the column in the vertical direction to guide the vertical movement of the column so that it is in close contact with the side surface of the steel pipe sheet pile near the lower end of the column. A spatula with a scraped-off part that has been rounded is attached to the spatula, and the spatula is equipped with a nozzle that sprays jet water onto the clay that adheres to the steel pipe sheet pile. When dropping the soil spatula, attach a guide device to the abdominal material of the steel pipe well tube, hang the support along the guide member of the guide device, and scrape the soil with a spatula while weakening the adhesion of the soil with a water jet. Drop it (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2000-23233

However, the manual excavation method has problems such as a small amount of unit work, an accident due to the falling of the soil, pollution of the surrounding environment due to suspension of water, and a decrease in work efficiency due to an increase in water depth.

In addition, with the method of suspending a support with a spatula or water jet nozzle attached along a guide, it is not possible to support the support at multiple positions when the water depth is deep, and it is difficult to secure the reaction force at the tip of the spatula. It was. In addition, since the guide is attached to the abdominal raising material, it is necessary to replace the guide on the unstable abdominal raising material for each work, which poses a big safety problem. Furthermore, since the force cannot be adjusted in the vertical downward direction, it is difficult to deal with hard soil layers and high-viscosity soil layers.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to secure a reaction force at the tip of a spatula with simple equipment, and to easily and surely perform work even at a large depth. It is a soil removal jig and a soil removal method that can be performed.

In order to achieve the above-mentioned object, the first invention is a jig for removing soil from a portion surrounded by a steel pipe sheet pile and a steel pipe joint, and is located on the vertical member and near the lower end of the vertical member on the soil level side. A main body composed of diagonal members connected so as to be inclined, a weight adjustable weight provided on the back surface of the vertical member, a plurality of suspension rings provided on the upper end of the vertical member, and the diagonal A spatula provided near the lower end of the member is provided, and the spatula is pressed against the steel pipe sheet pile by an arbitrary horizontal force by adjusting the suspension position by the suspension ring and adjusting the weight of the weight. It is a plumb bob removing jig characterized by ensuring horizontal force.

In the first invention, the main body of the earthen slab removal jig is configured by providing an oblique member connected so as to be inclined toward the earthen slab near the lower end of the vertical member. In addition, the suspension position is adjusted by the suspension ring provided at the upper end of the vertical member, and the weight of the weight provided on the back surface of the vertical member is adjusted to secure a horizontal force so that the spatula is pressed against the steel pipe sheet pile. .. As a result, the main body does not interfere with the abdominal raising material of the steel pipe sheet pile foundation when the soil is removed by moving the soil removal jig up and down. In addition, it is possible to prevent the soil from being left behind due to insufficient reaction force at the tip of the spatula, and it is possible to easily and surely perform the soil removal work even at a large depth.

It is desirable that the blade edge of the spatula has a rounded notch that matches the shape of the outer peripheral surface of the steel pipe sheet pile and the steel pipe joint.
If the blade edge of the spatula is provided with a rounded notch that matches the outer peripheral surface of the steel pipe sheet pile and the steel pipe joint, the notch will be caught by the steel pipe sheet pile on both sides of the steel pipe joint and prevent the jig from rotating. The soil removal work can be performed efficiently. Further, since the rounded cutout portion is caught on the wall surface of the steel pipe sheet pile without a gap, it is possible to simultaneously perform the work of removing the soil shavings adhering to the wall surface of the steel pipe sheet pile.

It is desirable that the spatula is removable from the diagonal member and is replaced according to the planar shape of the steel pipe sheet pile and the steel pipe joint.
By exchanging the spatula according to the plane shape of the steel pipe sheet pile and the steel pipe joint, it is possible to deal with places having different plane shapes such as the plane portion and the corner portion of the well cylinder.

A movable plate member may be provided on the vertical member, and the resistance of the water flow acting on the plate member may be converted into a pressing force at the tip of the spatula in the direction of the soil.
If the force of the water flow acting on the plate member provided on the vertical member is converted into the pressing force, the spatula can be more reliably pressed against the steel pipe sheet pile.

An auxiliary drilling device may be provided on the spatula.
If the spatula is equipped with a water jet, vibrator, compressed air discharge mechanism, screws such as augers, and auxiliary drilling devices such as cutter heads, it will stick to hard soil layers, highly viscous soil layers, steel pipe sheet piles, and steel pipe joints. It becomes possible to remove the soil slab more easily.

The second invention is a method of removing the soil from the portion surrounded by the steel pipe sheet pile and the steel pipe joint, and is a vertical member and an oblique member connected to the vicinity of the lower end of the vertical member so as to be inclined toward the soil. A main body composed of, a weight adjustable weight provided on the back surface of the vertical member, a plurality of suspension rings provided on the upper end portion of the vertical member, and a spatula provided on the lower end portion of the diagonal member. By adjusting the suspension position by the suspension ring and the weight of the weight using the earth plumb bob removing jig provided with the above, the spatula is horizontal so as to be pressed against the steel pipe sheet pile with an arbitrary horizontal force. This is a method of removing a plumb bob, which is characterized in that a force is secured to remove a plumb bob in a portion surrounded by the steel pipe sheet pile and the steel pipe joint.

In the second invention, a clay shaving jig having a main body portion in which diagonal members are connected so as to incline toward the clay slab near the lower end of the vertical member is used, and a suspension position is provided by a hanging ring provided at the upper end of the vertical member. And adjust the weight of the weight provided on the back of the vertical member to secure the horizontal force so that the spatula is pressed against the steel pipe sheet pile. As a result, the main body does not interfere with the abdominal raising material of the steel pipe sheet pile foundation when the soil is removed by moving the soil removal jig up and down. In addition, it is possible to prevent the soil from being left behind due to insufficient reaction force at the tip of the spatula, and it is possible to easily and surely perform the soil removal work even at a large depth.

The clay may be dropped while checking the adhesion state of the clay with a camera in water.
If you check the adhesion status of the soil in turbid water with an infrared camera or the like, you can remove the soil more reliably.

According to the present invention, it is possible to provide a soil removal jig and a soil removal method capable of securing the reaction force of the tip of a spatula with simple equipment and easily and surely performing work even at a large depth.

The figure which shows the outline of the earth slab removal jig 1. An enlarged view of the vicinity of the horizontal force generating portion 19 shown in FIG. 1 (b). The figure which shows the state which shows the state which the earth shaving jig 1 is hung down along the steel pipe sheet pile 54. Examination diagram of the posture of the soil removal jig 1 depending on the suspension position Top view showing the state of dropping the soil with a spatula

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an outline of a soil removal jig 1. FIG. 1A is a front view of the soil removal jig 1. FIG. 1B is a side view of the soil removal jig 1. FIG. 1C is a front view of the spatula 31.

As shown in FIGS. 1 (a) and 1 (b), the earthmoving jig 1 includes a main body portion 3, a weight 5, a hanging jig 9, a spatula 11, a horizontal force generating portion 19, and the like. The spatula 31 shown in FIG. 1 (c) is an attachment to be replaced with the spatula 11.

As shown in FIGS. 1A and 1B, the main body 3 is composed of a vertical member 3a, an oblique member 3b, a reinforcing member 26, and the like. The oblique member 3b is connected to the vicinity of the lower end portion 4 of the vertical member 3a so as to be inclined toward the clay soil side, that is, the front surface 24 side of the vertical member 3a. The main body 3 is formed of H steel. The reinforcing member 26 is provided on the back surface 25 side of the lower end portion 4 of the vertical member 3a.

The weight 5 is provided on the reinforcing member 26 on the back surface 25 of the vertical member 3a. The weight of the weight 5 can be adjusted. The hanging jig 9 is fixed to the upper end portion 7 of the vertical member 3a. The hanging jig 9 has a plurality of (two in the figure) hanging rings 8. Of the suspension rings 8 provided on the suspension jig 9, the suspension ring 8a is located on the front surface 24 side of the vertical member 3a, and the suspension ring 8b is located on the back surface 25 side of the vertical member 3a. The hanging jig 9 has reinforcing ribs 10 in the vertical direction on both side surfaces.

The spatula 11 is provided near the lower end portion 27 of the diagonal member 3b of the main body portion 3. The spatula 11 is removable from the diagonal member 3b. The spatula 11 is made of steel and has a rounded notch 15 at the cutting edge 13. The spatula 11 has a reinforcing rib 29 in the axial direction of the diagonal member 3b on the back surface 37. Reinforcing ribs 29 are provided at three locations on the back surface 37, for example. The reinforcing rib 29 also has a function as a leading excavation blade that splits the soil spatula prior to the spatula 11.

The spatula 31 shown in FIG. 1C is provided near the lower end portion 27 of the diagonal member 3b of the main body portion 3. The spatula 31 is removable from the diagonal member 3b like the spatula 11, and is replaced with the spatula 11 as needed. The spatula 31 is made of steel and has a rounded notch 35 at the cutting edge 33. The spatula 31 has an axial reinforcing rib 39 of the diagonal member 3b on the back surface. The reinforcing rib 39 also has a function as a leading excavation blade that splits the soil spatula prior to the spatula 31.

FIG. 2 is an enlarged view of the vicinity of the horizontal force generating portion 19 shown in FIG. 1 (b). 2 (a) and 2 (b) are views showing a state in which adjustment pins are installed in the adjustment holes 65a and 67b. 2 (c) and 2 (d) are views showing a state in which adjustment pins are installed in the adjustment holes 65b and 67d.

As shown in FIGS. 1A and 2, the horizontal force generating portion 19 includes a pair of plate members 17, pins 21, stoppers 23, adjusting pins 69, adjusting pins 71, mounting members 63, mounting members 73, and the like. Consists of. The horizontal force generating portion 19 is provided above the center of gravity of the soil removal jig 1.

The plate member 17 is movable, and one plate member 17 is provided on each side of the vertical member 3a of the main body 3. The plate member 17 is a steel plate or the like. The plate member 17 is provided with a mounting member 73 on the back surface 75 side. The vertical member 3a has flanges on the front surface 24 side and the back surface 25 side, but the side surface 28 is formed of a plate material or the like as needed, and the mounting member 63 is provided on the back surface 25 side of the side surface 28. The mounting member 73 is joined to the mounting member 63 by a pin 21. The plate member 17 can rotate around the pin 21 as a rotation axis. The plate member 17 is provided at a position where it does not come into contact with the weight 5 during rotation.

The plate member 17 is provided with stoppers 23 at the upper end and the lower end of the side of the main body 3 facing the side surface 28 of the vertical member 3a. The stopper 23 is an arc-shaped member. The stopper 23a is provided at the upper end of the plate member 17 so as to project toward the front surface 77. The stopper 23a has four adjusting holes 65a, 65b, 65c and 65d. The stopper 23b is provided at the lower end of the plate member 17 so as to project toward the back surface 75. The stopper 23b has four adjusting holes 67a, 67b, 67c and 67d.

The adjusting pin 69 is inserted into any of the four adjusting holes 65 from the plate member 17 side toward the vertical member 3a side. The adjusting pin 69 is removable from the adjusting hole 65. The adjusting pin 71 is inserted into any of the four adjusting holes 67 from the plate member 17 side toward the vertical member 3a side. The adjusting pin 71 is removable from the adjusting hole 67. The adjusting pin 69 and the adjusting pin 71 have a length that abuts on the front surface 79 of the weight 5 when the plate member 17 rotates.

In the horizontal force generating portion 19, the lower portion provided with the stopper 23b is heavier than the upper portion provided with the stopper 23a around the pin 21 which is the rotation axis. The horizontal force generating portion 19 is in a neutral state in which the lower portion of the plate member 17 is inclined toward the front surface 24 side of the vertical member 3a.

Next, a method for removing the soil shavings using the soil shaving jig 1 will be described. FIG. 3 is a diagram showing a state in which the soil removal jig 1 is suspended along the steel pipe sheet pile 43. FIG. 4 is a study diagram of the posture of the soil removal jig 1 depending on the suspension position.

When dropping the soil using the soil removal jig 1, first, the wire 47 of the pontoon 41 with a crane shown in FIG. 3 is connected to the hanging jig 9 of the soil removal jig 1 to remove the soil. Suspend the jig 1.

At this time, the hanging ring 8 of the earth retaining jig 1 shown in FIG. 1 is appropriately selected, and the hanging position is adjusted by moving the tip position of the jib 46 toward the steel pipe sheet pile 43 side. When the earth retaining jig 1 shown in FIG. 1 is suspended by using the hanging ring 8a of the hanging jig 9, it has a posture as shown by the broken line 61 in FIG. Further, when the ring 8b is used to suspend the jig 1, the soil removing jig 1 has a posture as shown by the dotted line 59 in FIG. When the blade edge 13 of the spatula 11 is pressed against the steel pipe sheet pile 43 and the tip position of the jib 46 is adjusted and hung so that the vertical member 3a is vertical, the earthmoving jig 1 is shown in FIG. The posture is as shown by the solid line 57. The suspension position by the ring 8 and the jib 46 is adjusted so that the horizontal force for pressing the blade edge 13 of the spatula 11 against the steel pipe sheet pile 43 is secured and the vertical force is in accordance with the soil quality of the ground 45. To.

At the same time as adjusting the suspension position, the weight of the weight 5 is also adjusted. The weight of the weight 5 is adjusted so that the force in the vertical direction corresponds to the soil quality of the ground 45. The posture of the soil removal jig 1 can also be adjusted by the weight 5.

Further, in the horizontal force generating unit 19 shown in FIG. 2, the adjusting hole 65 into which the adjusting pin 69 is inserted and the adjusting hole 67 into which the adjusting pin 71 is inserted are appropriately selected. As a result, the rotation range of the plate member 17 is set from the angle at which the adjusting pin 69 abuts on the front surface 79 of the weight 5 to the angle at which the adjusting pin 71 abuts on the front surface 79 of the weight 5.

For example, as shown in FIGS. 2A and 2B, when the adjustment pin 69 is inserted into the adjustment hole 65a and the adjustment pin 71 is inserted into the adjustment hole 67b, the angle shown in FIG. 2A is used. The rotation range of the plate member 17 is up to the angle shown in FIG. 2B. As shown in FIGS. 2 (c) and 2 (d), when the adjustment pin 69 is inserted into the adjustment hole 65b and the adjustment pin 71 is inserted into the adjustment hole 67d, FIG. 2 is viewed from the angle shown in FIG. 2 (c). The rotation range of the plate member 17 is up to the angle shown in (d).

When dropping the clay using the clay slip removing jig 1, the spatula 11 is pressed against the steel pipe sheet pile 43 with a horizontal force of an arbitrary appropriate size by adjusting the hanging position and the weight of the weight 5. With the horizontal force secured as described above and the rotation range of the plate member 17 of the horizontal force generating portion 19 is set, the soil removal jig 1 is suspended by the wire 47. After that, as shown in FIG. 3, the wire 47 is unwound and the soil removal jig 1 is lowered in water.

As described above, in the horizontal force generating portion 19 shown in FIG. 2, the lower portion of the plate member 17 is inclined toward the front surface 24 side of the vertical member 3a in a state where the water flow does not act. When the soil removal jig 1 is lowered in water, the horizontal force generating portion 19 is rotated around the pin 21 by the water flow, and the adjusting pin 69 inserted into the adjusting hole 65 of the stopper 23a of the plate member 17 is heavy at the maximum. It is in a state of being tilted to an angle of contact with the front surface 79 of the weight 5. Then, due to the wing effect of the plate member 17, the vertical member 3a of the main body 3 falls toward the clay pipe sheet pile 43 from the vertical direction, and the resistance of the water flow is converted into a pressing force in the direction of the spatula tip.

When the wire 47 is unwound and the soil scraping jig 1 is lowered, the soil scraping is scraped off by the spatula 11. FIG. 5 is a view showing a state in which the soil is dropped by a spatula, and shows a cross-sectional view of the steel pipe sheet pile 43 in a plane perpendicular to the axial direction. FIG. 5A is a diagram showing a state in which the soil spatula 53 is dropped by the spatula 11. FIG. 5B is a diagram showing a state in which the soil spatula 55 is dropped by the spatula 31.

As shown in FIG. 5A, when dropping the belly portion of the steel pipe sheet pile 43 on the flat surface of the steel pipe well and the clay pipe 53 attached to the steel pipe joint 49, the clay spatula 11 is attached to the diagonal member 3b. The drop jig 1 is used. As shown in FIG. 5A, the notch portion 15 provided in the blade edge 13 of the spatula 11 shown in FIG. 1A is the outer peripheral surface 51 of the steel pipe sheet pile 43 and the steel pipe joint 49 in the flat surface portion of the steel pipe well tube. It is a curved shape that matches the shape.

While pressing the spatula 11 against the steel pipe sheet pile 43 and the steel pipe joint 49 on the flat surface of the steel pipe well cylinder, when the earth spatula removing jig 1 to which the spatula 11 is attached to the diagonal member 3b is lowered, the reinforcing rib 29 on the back surface of the spatula 11 is released. As a leading excavation blade, the soil spatula 53 is split prior to the spatula 11. After that, the spatula 11 scrapes off the soil spatula 53.

After lowering the soil removal jig 1 once, if the soil spatula 53 remains, raise the soil removal jig 1 with a horizontal force secured so that the spatula 11 is pressed against the steel pipe sheet pile 43. Then, scrape off the remaining soil 53 with the spatula 11. If it is not possible to remove all the soil slabs by moving them up and down once, move the soil slab removal jig 1 up and down several times at the same place. When ascending, the horizontal force generating portion 19 returns to the neutral state due to the weight difference of the plate member 17 and the water flow.

When removing the belly portion of the steel pipe sheet pile 43 at the corner of the steel pipe well and the earthen pipe 55 adhering to the steel pipe joint 49, the spatula 11 is removed from the diagonal member 3b of the earthen pipe removing jig 1 and FIG. A spatula 31 is attached to the diagonal member 3b as shown in. As shown in FIG. 5B, the notch 35 provided in the blade edge 33 of the spatula 31 shown in FIG. 1C has the shape of the outer peripheral surface of the steel pipe sheet pile 43 and the steel pipe joint 49 at the corner of the steel pipe well tube. It has a curved shape that matches.

When the spatula 31 is pressed against the steel pipe sheet pile 43 and the steel pipe joint 49 at the corner of the steel pipe well, and the earth spatula removing jig 1 to which the spatula 31 is attached to the diagonal member 3b is lowered, the reinforcing rib 39 on the back surface of the spatula 31 is released. As a leading excavation blade, the soil spatula 55 is split prior to the spatula 31. After that, the spatula 31 scrapes off the soil spatula 55. If the soil slab 55 remains after the soil slab removal jig 1 is lowered once, the soil slab removal jig 1 is used in the same manner as the soil slab removal jig 1 on the flat surface of the steel pipe well tube shown in FIG. 5 (a). Move up and down several times.

As described above, in the present embodiment, the slanted member 3b is connected to the vicinity of the lower end portion 4 of the vertical member 3a so as to be inclined toward the soil slab, and the main body portion 3 of the soil slab removing jig 1 is formed. As a result, when the spatula 11 is pressed against the steel pipe sheet pile 43 and the soil spatula removing jig 1 is moved up and down to drop the soil spatula, the main body 3 does not interfere with the raising material of the steel pipe sheet pile 43.

Further, the suspension position is adjusted by the suspension ring 8 provided at the upper end portion 7 of the vertical member 3a, and the weight of the weight 5 provided on the back surface 25 of the vertical member 3a is adjusted. By adjusting the weight of the weight 5, the force in the vertical direction is adjusted so that the ground 45 can cope with a hard soil layer or a highly viscous soil layer. Further, if the suspension position by the suspension ring 8 is adjusted, the force in the vertical direction and the force in the horizontal direction for pressing the spatula 11 and the spatula 31 against the steel pipe sheet pile 43 are adjusted to an arbitrary magnitude. If the force in the horizontal direction is secured, it is possible to prevent the soil from being left behind due to insufficient reaction force at the tips of the spatula 11 and the spatula 31, and the soil can be easily and surely removed even at a large depth.

In the present embodiment, the notch portion 15 of the blade edge 13 of the spatula 11 has a rounded shape that matches the shape of the outer peripheral surfaces of the steel pipe sheet pile 43 and the steel pipe joint 49. As a result, when the clay pipe 53 is dropped, the notch portion 15 is caught by the steel pipe sheet piles 43 on both sides of the steel pipe joint 49, so that the clay pipe removing jig 1 can be prevented from rotating and the work can be performed efficiently. Further, since the rounded cutout portion 15 is caught on the wall surface of the steel pipe sheet pile 43 without a gap, the work of removing the soil spatula 53 adhering to the wall surface of the steel pipe sheet pile 43 can be performed at the same time.

Further, the spatula 11 and the spatula 31 are made detachable from the diagonal member 3b, and are replaced according to the planar shapes of the steel pipe sheet pile 43 and the steel pipe joint 49. This makes it possible to handle locations with different planar shapes, such as the planar portion and the corner portion of the steel pipe well.

Further, the vertical member 3a is provided with a horizontal force generating portion 19 having a movable plate member 17, and the resistance of the water flow acting on the plate member 17 is converted into a pressing force at the tip of the spatula in the direction of the soil. As a result, the spatula 11 and the spatula 31 can be more reliably pressed against the steel pipe sheet pile 43.

In this embodiment, the spatula 11 and the spatula 31 may be provided with an auxiliary drilling device. If the spatula 11 or spatula 31 is provided with a water jet, a vibrator, a compressed air discharge mechanism, a screw such as an auger, or an auxiliary drilling device such as a cutter head, the soil can be a hard soil layer or a highly viscous soil layer, or fixed soil. It becomes possible to drop the spatula more easily. However, when using a water jet or a compressed air discharge mechanism, ensure a sufficient pressing force in the direction of the spatula in order to prevent insufficient reaction force at the tip of the spatula.

Further, when the soil slab is removed by using the soil slab removing jig 1, the state of adhesion of the soil slab may be confirmed in turbid water by using an infrared camera or the like.

In the present embodiment, the hanging jig 9 is provided with two hanging rings 8, but the number of hanging rings is not limited to two. Further, the number of adjusting holes 65 and 67 provided in the stopper 23 of the horizontal force generating portion 19 is not limited to four. Further, the installation of the horizontal force generating unit 19 is not essential.

Although the preferred embodiment of the soil removal jig and the soil removal method according to the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modified or modified examples within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.

1 ………… Soil removal jig 3 ………… Main body 3a ………… Vertical member 3b ………… Diagonal member 4, 27 ………… Lower end 5 ………… Weight 7 ………… Upper end 8, 8a , 8b ……… Hanging ring 9 ……… Hanging jig 10, 29, 39 ……… Reinforcing ribs 11, 31 ……… Spatula 13, 33 ……… Cutting edge 15, 35 ……… Notch 17 …… … Plate member 19 ………… Horizontal force generator 21 ………… Pins 23, 23a, 23b ………… Stoppers 24, 77, 79 ………… Front 25, 37, 75 ………… Back 26 ………… Reinforcing member 28 ……… Side 41 ………… Crane-equipped pontoon 43 ………… Steel pipe sheet pile 45 ………… Ground 46 ………… Jig 47 ………… Wire 49 ………… Steel pipe joint 51 ………… Outer surface 53, 55 …… … Crane 57 ………… Solid line 59 ……… Dotted line 61 ………… Dashed lines 63, 73 ……… Mounting members 65, 65a, 65b, 65c, 65d, 67, 67a, 67b, 67c, 67d ……… Adjustment Holes 69, 71 ……… Adjustment pin

Claims (7)

It is a jig for removing soil from the part surrounded by the steel pipe sheet pile and the steel pipe joint.
A main body composed of a vertical member and an oblique member connected so as to incline toward the soil near the lower end of the vertical member.
A weight adjustable weight provided on the back surface of the vertical member and
A plurality of hanging rings provided at the upper end of the vertical member,
A spatula provided near the lower end of the diagonal member,
Equipped with
By adjusting the suspension position by the hanging ring and adjusting the weight of the weight, a horizontal force is secured so that the spatula is pressed against the steel pipe sheet pile by an arbitrary horizontal force. .. The earthmoving jig according to claim 1, wherein the blade edge of the spatula has a rounded notch that matches the shape of the outer peripheral surface of the steel pipe sheet pile and the steel pipe joint. The earthmoving jig according to claim 1 or 2, wherein the spatula is removable from the diagonal member and is replaced according to the planar shape of the steel pipe sheet pile and the steel pipe joint. .. Claims 1 to 3 are characterized in that a movable plate member is provided on the vertical member, and the resistance of the water flow acting on the plate member is converted into a pressing force at the tip of the spatula in the direction of the soil. The soil removal jig described in any of. The soil removal jig according to any one of claims 1 to 4, wherein an auxiliary drilling device is provided on the spatula. It is a method of removing soil from the part surrounded by the steel pipe sheet pile and the steel pipe joint.
A main body composed of a vertical member and an oblique member connected so as to incline toward the clay near the lower end of the vertical member.
A weight adjustable weight provided on the back surface of the vertical member and
A plurality of hanging rings provided at the upper end of the vertical member,
A spatula provided at the lower end of the diagonal member,
Using a soil removal jig equipped with
By adjusting the suspension position by the ring and adjusting the weight of the weight, a horizontal force is secured so that the spatula is pressed against the steel pipe sheet pile with an arbitrary horizontal force, and the steel pipe sheet pile and the steel pipe joint A method of removing the earthenware, which is characterized by removing the earthenware in the area surrounded by. The method for removing a soil slab according to claim 6, wherein the soil slab is removed while checking the state of adhesion of the soil slab using a camera in water.

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