JP2012202043A - Method for excavating slope of ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively excavate a slope of the ground without taking much time and effort for laying a rail on the slope for an excavator by enabling the same to excavate the slope without laying the rail on the slope of the ground.SOLUTION: A method for excavating a slope of the ground includes the operations: to install a stage at a position on the ground apart from the slope; to load an excavator onto the stage; to sling and transport the stage with the excavator loaded thereon from the position on the ground to the slope; and to excavate the slope with the excavator.

Description

  The present invention relates to a method for excavating a ground slope.

  Conventionally, a method of excavating the slope of the ground includes laying a rail extending in the slope direction of the slope on the slope, and then moving the excavator from below the slope to the excavation position on the slope on the rail. And then excavating the slope with the excavator at the excavation position (see Patent Document 1).

  In order to move the excavator from below the slope to the excavation position on the rail, it is not necessary to provide a loading path on the slope to carry the excavator from below the slope to the excavation position. . For this reason, it is possible to excavate the slope without providing much time and effort to provide the carry-in path on the slope and regardless of whether there is a space for the carry-in path.

JP 2002-167762 A

  However, in order to excavate the slope by the excavator moved on the rail from below the slope to the excavation position, it is necessary to lay the rail on the slope, and the rail to the slope It takes a lot of work and time to install. For this reason, excavation of the slope cannot be performed efficiently.

  An object of the present invention is to enable the excavator to excavate the slope without laying a rail for the excavator on the ground slope, thereby laying the rail on the slope with a lot of labor and time. It is to be able to excavate the slope efficiently without applying a slack.

  In the present invention, after the platform on which the excavator is mounted is lifted and moved from the position on the ground separated from the slope of the ground to the slope, the slope is excavated by the excavator. Accordingly, the slope can be excavated by the excavator without laying rails for the excavator on the slope, and much time and effort are not required for laying the rail on the slope. To enable efficient excavation of the slope.

  According to the present invention, there is provided a method for excavating a slope of a ground, a first step of placing a pedestal at a position on the ground separated from the slope, a second step of placing an excavator on the pedestal, and the excavation A third step of lifting the platform on which the machine is mounted and moving the platform from the position to the slope, and a fourth step of excavating the slope by the excavator.

  After lifting the platform on which the excavator is mounted and moving the excavator from the position to the slope, the excavator is railed from below the slope to an excavation position on the slope to excavate the slope. It is not necessary to lay the rail on the slope as in the conventional case where the slope is excavated by the excavator at the excavation position after being moved on. For this reason, the said slope can be excavated efficiently, without spending much effort and time for the installation of the said rail to the said slope.

  The gantry may be a flat plate having a peripheral edge and a notch or an opening provided on the peripheral edge and opened outward from the peripheral edge. In this case, in the third step, the platform is moved to the slope so that the notch or the opening is close to the slope, and after the fourth step, the earth and sand generated by excavation of the slope is removed. It drops onto the slope through the notch or the opening from above the gantry.

  After moving the pedestal to the slope so that the notch or the opening is close to the slope, the earth and sand generated by excavation of the slope is removed from the notch or the opening from the top of the gantry. The earth and sand can be dropped onto the slope from the top without turning the excavator excavating the slope, and the time required for turning the excavator can be saved. The slope can be excavated more efficiently.

  The slope excavation method may include a fifth step of fixing the mount to the slope after the third step and before the fourth step. The slope excavation method may be such that at least one lock bolt is fixed to the slope before the fifth step, and the gantry is coupled to the lock bolt in the fifth step. In the fifth step, the slope excavation method may connect the mount and a position on the ground separated from the slope using a wire rope. The slope may be in water.

  According to the present invention, after the platform on which the excavator is mounted is lifted and moved from the position on the ground separated from the slope of the ground to the slope, the excavator excavates the slope, Laying the rail on the slope as in the conventional case of excavating the slope by the excavator at the excavation position after moving the excavator from below the slope to the excavation position on the slope. Is not required. Accordingly, the slope can be efficiently excavated without taking much time and time to lay the rail on the slope.

The longitudinal cross-sectional view of the ground when mounting an excavator on the mount frame in 1st Example of this invention. The top view of the mount frame concerning 1st Example of this invention. The longitudinal cross-sectional view of the ground when a lock bolt is fixed to the slope. The longitudinal cross-sectional view of the ground when a mount frame is fixed to a slope. The perspective view of the ground when a mount is fixed to a slope. The top view of the ground in the line 6 of FIG. The longitudinal cross-sectional view of the ground when excavating the slope with an excavator. The longitudinal cross-sectional view of the ground when the earth and sand produced by the excavation of the slope are dropped on the slope through the notch from the top of the mount. The perspective view of the ground when the mount frame is fixed to the slope in the second embodiment of the present invention. The top view of the ground in the line 10 of FIG. The top view of the mount frame concerning 3rd Example of this invention. The top view of the mount frame which concerns on 4th Example of this invention. The perspective view of the ground when the mount frame is fixed to the slope in the fourth embodiment of the present invention. The perspective view of the ground when the mount frame is fixed to the slope in the fifth embodiment of the present invention. The top view of the mount frame which concerns on 6th Example of this invention. The top view of the mount frame which concerns on 7th Example of this invention. In the 8th Example of this invention, the longitudinal cross-sectional view of the ground when mounting an excavator on a mount frame. In the 8th Example of this invention, the longitudinal cross-sectional view of a ground when a mount frame is fixed to the slope. The longitudinal cross-sectional view of the ground when the mount frame is fixed to the slope in the ninth embodiment of the present invention. In the 10th Example of this invention, the longitudinal cross-sectional view of a ground when a mount frame is fixed to a slope.

  As shown in FIG. 1, when excavating the slope 12 of the ground 10, a mount 16 is disposed at a position 14 on the ground 10 that is separated from the slope 10. The position 14 is below the slope 12 and the surface of the ground 10 at the position 14 is flat. Before placing the mount 16 at the position 14 or after placing the mount 16 at the position 14, the crane 18 is placed on the ground 10 close to the position 14. A new slope 20 is formed on the ground 10 by excavating the slope 12.

  As shown in FIG. 2, the gantry 16 is a flat plate having a peripheral portion 22 and a cutout portion 24 provided at the peripheral portion and opened outward of the peripheral portion. In the example shown in FIG. 2, the gantry 16 has a rectangular shape, one end portion 26 and the other end portion 28, and the one end portion 26 and the other end portion separated in the length direction of the gantry 16 (left and right direction in FIG. 2). 28 and two side portions 30 that are spaced apart from each other in the width direction of the gantry 16 (vertical direction in FIG. 2). The cutout portion 24 is located at one end portion 26 and is opened outward in the length direction of the one end portion. The gantry 16 is made of metal.

  An inclinometer 16 a is attached to the gantry 16. A display (not shown) is disposed at a position (not shown) on the ground 10 separated from the gantry 16, and the display is connected to the inclinometer 16a so as to be capable of wireless communication or wired communication. The inclinometer 16a measures the inclination of the gantry 16 with respect to a horizontal plane, and transmits data related to the inclination obtained by the measurement to the display. The display receives the data transmitted to the display by the inclinometer 16a and displays the data.

  After placing the gantry 16 at the position 14, the excavator 32 is placed on the gantry 16 as shown in FIG. 1. The excavator 32 is a backhoe, a power shovel, or the like. The excavator 32 includes a main body and an arm attached to the main body, and excavates the slope 12 by moving the tip of the arm in a direction to draw the main body toward the main body. When mounting the excavator 32 on the gantry 16, the excavator may be self-propelled from the position (not shown) on the ground 10 separated from the gantry 16 onto the gantry 16, or excavated by the crane 18. The machine 32 may be suspended from above the gantry 16. After placing the excavator 32 on the gantry 16, the excavator 32 is fixed to the gantry 16.

  Thereafter, as shown in FIG. 3, the plurality of lock bolts 34 are fixed to the inclined surface 12 at intervals in the horizontal direction. Thereafter, the gantry 16 on which the excavator 32 is placed is lifted and moved from the position 14 to the slope 12 by the crane 18. At this time, while maintaining the suspended state of the gantry 16, as shown in FIGS. 4 to 6, the gantry 16 is moved to the inclined surface 12 so that the notch 24 of the gantry 16 is close to the inclined surface 12, that is, the gantry 16 The pedestal 16 is moved to the slope 12 so that one end portion 26 thereof is in contact with the slope 12. Thereafter, the gantry 16 is fixed to the slope 12. At this time, one end portion 26 of the gantry 16 is coupled to each lock bolt 34.

  While the gantry 16 is being lifted, the gantry 16 is maintained in a horizontal state. However, when the gantry 16 is moved to the slope 12, one end portion 26 of the gantry 16 is caught on the slope 12, and the gantry 16 is inclined with respect to the horizontal plane. There are things to do. Therefore, in order to confirm that the gantry 16 is horizontal, after the gantry 16 is moved to the slope 12, the inclination of the gantry 16 with respect to the horizontal plane is measured by the inclinometer 16a, and the data relating to the inclination obtained by the measurement is obtained. Is transmitted from the inclinometer 16a to the display by wireless communication or wired communication, and the data is displayed on the display. As a result of the measurement, when the gantry 16 is inclined with respect to the horizontal plane, the gantry 16 is moved away from the slope 12 by the crane 18, and the gantry 16 is moved to the slope 12 again, and the inclination of the gantry 16 is measured by the inclinometer 16a. taking measurement. As a result of the measurement, when the gantry 16 is horizontal, the gantry 16 is fixed to the slope 12.

  After the gantry 16 is fixed to the slope 12, the slope 12 is excavated by an excavator 32 as shown in FIG. At this time, the excavator 32 is remotely operated to excavate the slope 12, that is, the slope 12 is unmanned. Instead of the above example of unmanned excavation of the slope 12, an operator who has boarded the excavator 32 may excavate the slope 12 by operating the excavator, that is, the slope 12 may be manned. After excavating the slope 12 by the excavator 32, as shown in FIG. 8, the earth and sand 36 produced by the excavation is dropped onto the slope 12 from the top of the base 16 through the notch 24 of the base.

  Thereafter, the coupling between the lock bolt 34 and the gantry 16 is released, the gantry 16 is fixed to the slope 12, and the gantry 16 is moved from the already excavated position on the slope 12 to the position where it has not yet been excavated by the crane 18. Thereafter, the gantry 16 is fixed to the slope 12 at the unexcavated position, and the slope 12 is excavated by the excavator 32.

  After the platform 16 on which the excavator 32 is mounted is lifted and moved from the position 14 to the slope 12, the excavator 32 is moved from the bottom of the slope 12 to the excavation position on the slope 12 in order to excavate the slope 12. It is not necessary to lay the rail on the slope 12 as in the conventional case where the slope 12 is excavated by the excavator 32 at the excavation position after being moved on (not shown). For this reason, the slope 12 can be efficiently excavated without spending much time and labor for laying the rail on the slope 12.

  After moving the gantry 16 to the slope 12 so that the notch 24 of the gantry 16 is close to the slope 12, the earth and sand 36 generated by excavating the slope 12 is transferred from the top of the gantry 16 to the slope 12 via the notch 24. In order to drop, the earth and sand 36 can be dropped onto the slope 12 from the gantry 16 without turning the excavator 32 excavating the slope 12. For this reason, the time required for the excavator 32 to turn can be saved, and the slope 12 can be excavated more efficiently.

  The lock bolt 34 is fixed to the slope 12 after the excavator 32 is placed on the gantry 16 and before the excavator 32 is moved to the slope 12 before the excavator 32 is placed on the gantry 16. Alternatively, it may be performed after the gantry 16 is moved to the slope 12 and before the gantry 16 is fixed to the slope 12.

  The number of the lock bolts 34 may be one instead of the above example. Also, anchor bolts may be used in place of the above example in which the lock bolts 34 are used to fix the gantry 16 to the slope 12. In this case, at least one anchor bolt (not shown) is fixed to the inclined surface 12, and then the gantry 16 is coupled to the anchor bolt.

  9 and 10, instead of the example shown in FIGS. 4 to 6, in which a plurality of lock bolts 34 are fixed to the inclined surface 12 and then the base 16 is directly coupled to each lock bolt, the bases are attached to the respective lock bolts 34. 16 are connected by a wire rope 38. In the example shown in FIGS. 9 and 10, the gantry 16 moved to the first position 40 of the slope 12 is fixed to the slope 12. Prior to this, the second position that is lower than the first position 40 on the slope 12. The lock bolt 34 is fixed at the position 42. Thereafter, when the gantry 16 is fixed to the slope 12, the lock bolts 34 and the gantry 16 are connected by the wire rope 38.

  When the slope 12 is excavated by the excavator 32, the gantry 16 may be lifted by receiving upward force from the excavator 32. By connecting the lock bolt 34 fixed to the second position 42 at a height lower than the first position 40 of the slope 12 and the mount 16 moved to the first position 40 of the slope 12 with the wire rope 38, the mount 16 Can be prevented from floating.

  In place of the example shown in FIGS. 9 and 10 in which the lock bolt 34 is fixed to the second position 42 that is lower than the first position 40 of the slope 12, the lock bolt 34 is positioned at the same height as the first position 40. May be fixed, or the lock bolt 34 may be fixed at a position higher than the first position 40. After fixing a plurality of lock bolts 34 to the slope 12, after fixing one lock bolt 34 to the slope 12 instead of the example shown in FIGS. The lock bolt and the gantry 16 may be connected by a wire rope 38.

  In the example shown in FIG. 11, the notch portion 24 of the gantry 16 is provided at one end portion 26 of the gantry 16 and is opened outward in the length direction of the one end portion. It exists in the side part 30 of the mount frame 16, and is open | released to the outward of the said width direction of this side part. In this case, when the gantry 16 is moved to the inclined surface 12, the gantry 16 is moved to the inclined surface 12 so that the side portion 30 of the gantry 16 is in contact with the inclined surface 12, that is, the notch portion 24 is close to the inclined surface 12. Is moved to the slope 12. It should be noted that the notch 24 is provided at the peripheral edge 22 of the gantry 16 both when the notch 24 is at one end 26 of the gantry 16 and when the notch 24 is at the side 30 of the gantry 16. Yes.

  The gantry 16 may be a square, a circle, an ellipse, a triangle, a pentagon, or another polygon instead of the rectangular shape shown in FIG. In any case, the notch 24 is provided at the peripheral portion of the gantry 16, and when the gantry 16 is moved to the slope 12, the cradle 16 is moved to the slope 12 so that the notch 24 is close to the slope 12. Move.

  In the example shown in FIG. 12, two rod-shaped members 44 are fixed to the one end portion 26 of the gantry 16 at an interval in the width direction, and each rod-shaped member 44 is outward from the one end portion 26 in the length direction. Is growing. The notch 24 is located between the position where one rod-shaped member 44 is fixed at one end 26 of the gantry 16 and the position where the other rod-shaped member 44 is fixed. In this case, as shown in FIG. 13, before fixing the gantry 16 to the inclined surface 12, a plurality of holes (not shown) are formed at intervals in the horizontal direction on the inclined surface to fix the gantry 16 to the inclined surface 12. Each rod-like member 44 is inserted into the hole and fixed. The number of rod-shaped members 44 may be one or three or more in place of the example shown in FIG.

  In the example shown in FIG. 14 instead of the example shown in FIG. 12 in which the two rod-like members 44 are fixed to the one end portion 26 of the gantry 16, the two flange-like members 46 are arranged at the one end portion 26 of the gantry 16 with the width. Installed at intervals in the direction. When the gantry 16 is fixed to the slope 12, the hook-shaped members 46 are engaged with the slope 12. The number of hook-shaped members 46 may be one or three or more instead of the example shown in FIG. Instead of the example shown in FIG. 14 in which the hook-like member 46 is attached to the one end portion 26 of the gantry 16, fixing means (FIG. (Not shown) may be attached.

  In the example shown in FIG. 15, an opening 48 is provided in the peripheral edge 22 of the gantry 16 instead of the example shown in FIG. 2 in which the notch 24 is provided in the peripheral edge 22 of the gantry 16. In this case, after the gantry 16 is moved to the slope 12 so that the opening 48 is close to the slope 12, the earth and sand 36 generated by excavation of the slope 12 is dropped onto the slope 12 from the top of the gantry 16 through the opening 48. In the example shown in FIG. 15, the opening 48 is provided at the one end portion 26 of the gantry 16, but may be provided at the side portion 30 of the gantry 16 instead.

  Instead of the example shown in FIG. 15 in which the opening 48 is provided in the peripheral edge 22 of the gantry 16, the opening 48 may not be provided in the peripheral edge 22 of the gantry 16 as shown in FIG. 16. In this case, earth and sand 36 generated by excavation of the slope 12 is dropped onto the slope 12 from the top of the base 16 through the side of the base 16.

  The gantry 16 may be made of wood or reinforced concrete instead of the example shown in FIG. 2 made of metal. The position 14 may be on the slope 12 instead of the example shown in FIG. The excavation of the slope 12 may be performed in order to remove the earth and sand that has collapsed on the slope 20 due to the landslide, instead of the example shown in FIG. 1 performed to form a new slope 20 on the ground 10.

  In the example shown in FIG. 1, the slope 12 is on land, but instead, it is in the water in the example shown in FIG. In the example shown in FIG. 17, the slope 12 is in a dam lake 52 formed by the dam 50. When excavating the slope 12, the carriage 54 is floated on the dam lake 52 and moored on the lake shore 56, and the crane 18 is placed on the carriage 54.

  Before or after the placement of the crane 18 on the carriage 54, the gantry 16 is placed at a position 14 on the ground 10 separated from the slope 12, and the excavator 32 is placed on the gantry 16. Location 14 is above lake shore 56. The excavator 32 is an excavator that can perform underwater excavation work, such as a so-called underwater backhoe.

  After placing the excavator 32 on the gantry 16, a plurality of lock bolts 34 are fixed to the slope 12 at intervals in the horizontal direction. Thereafter, the gantry 16 on which the excavator 32 is placed is lifted and moved from the position 14 to the slope 12 by the crane 18. Thereafter, as shown in FIG. 18, the gantry 16 is moved to the slope 12 so that the notch 24 of the gantry 16 is close to the slope 12 while maintaining the state where the gantry 16 is suspended. At this time, the gantry 16 is coupled to each lock bolt 34.

  After the gantry 16 is moved to the slope 12, before the gantry 16 is fixed to the slope 12, the inclination of the gantry 16 with respect to the horizontal plane is measured by an inclinometer 16a, and the data relating to the inclination obtained by the measurement is wirelessly transmitted. The data is transmitted from the inclinometer 16a to the display by communication or wired communication, and the data is displayed on the display. As a result of the measurement, when the gantry 16 is inclined with respect to the horizontal plane, the gantry 16 is moved away from the slope 12 by the crane 18, and the gantry 16 is moved to the slope 12 again, and the inclination of the gantry 16 is measured by the inclinometer 16a. taking measurement. As a result of the measurement, when the gantry 16 is horizontal, the gantry 16 is fixed to the slope 12.

  After fixing the gantry 16 to the slope 12, the slope 12 is excavated by the excavator 32. At this time, the excavator 32 may be remotely operated to excavate the slope 12, or an operator who has boarded the excavator 32 may excavate the slope 12 by operating the excavator 32. After the slope 12 is excavated by the excavator 32, the earth and sand generated by the excavation is dropped onto the slope 12 from the top of the mount 16 through the notch 24.

  Thereafter, the coupling between the lock bolt 34 and the gantry 16 is released, the gantry 16 is fixed to the slope 12, and the gantry 16 is moved from the already excavated position on the slope 12 to the position where it has not yet been excavated by the crane 18. Thereafter, the gantry 16 is fixed to the slope 12 at the unexcavated position, and the slope 12 is excavated by the excavator 32.

  After the platform 16 on which the excavator 32 is mounted is lifted and moved from the position 14 to the slope 12, a relatively large dredger (not shown) is moved to the dam lake 52 in order to excavate the slope 12 by the excavator 32. The slope 12 can be excavated regardless of whether or not a carry-in path for carrying the dredger into the dam lake 52 can be secured without requiring the carry-in.

  Instead of the example shown in FIG. 18 in which the lock bolt 34 is fixed to the slope 12 and then the stand 16 is directly coupled to the lock bolt, the stand 16 is attached to the lock bolt 34 similarly to the example shown in FIGS. May be coupled by a wire rope.

  In the example shown in FIG. 18, the gantry 16 is one in which the rod-like member 44 is not fixed to the one end portion 26 of the gantry 16. Instead of this, as shown in FIG. The rod-shaped members 44 may be fixed at intervals in the width direction, and each rod-shaped member 44 may extend outward from the one end portion 26 in the length direction. In this case, before fixing the gantry 16 to the slope 12, a plurality of holes (not shown) are bored in the slope in the horizontal direction, and when fixing the gantry 16 to the slope 12, Insert and fix in the hole.

  The gantry 16 has two rod-shaped members at one end 26 as shown in FIG. 14 instead of the example shown in FIG. 12 in which two rod-like members 44 are fixed to the one end 26 of the gantry. 46 may be attached at intervals in the width direction. In this case, when the gantry 16 is fixed to the slope 12, the hook-shaped members 46 are engaged with the slope 12. Instead of the above example in which the hook-like member 46 is attached to the one end portion 26 of the gantry 16, a fixing means (not shown) for holding the pedestal 16 to the inclined surface 12 by grasping the inclined surface 12 at the one end portion 26 of the gantry 16. May be attached.

  The gantry 16 has an opening 48 in the peripheral portion 22 as shown in FIG. 15 instead of the example shown in FIG. 18 in which the notch 24 is provided in the peripheral portion 22 of the pedestal. Can be. In this case, when the gantry 16 is moved to the slope 12, the gantry 16 is moved to the slope 12 so that the opening 48 is close to the slope 12, the excavator 32 excavates the slope 12, and then the earth and sand generated by the excavation. Is dropped onto the slope 12 through the opening 48 from above the gantry 16. The gantry 16 is not provided with the opening 48 in the rim portion 22 of the gantry 16 as shown in FIG. 16 instead of the example shown in FIG. 15 in which the rim portion 22 is provided with the opening 48 in the rim portion 22. Can be.

  The slope 12 may be in a natural lake, river or sea instead of the example shown in FIG. The position 14 may be on the top 58 of the dam 50 instead of the example shown in FIG. The excavation of the slope 12 may be performed to form a new slope 20 on the ground 10, or may be performed to remove the earth and sand that has collapsed on the slope 20 due to landslide. You may carry out in order to remove the sediment.

  In the example shown in FIG. 19, a coupling means 60 for coupling the gantry 16 to the lock bolt 34 is attached to one end portion 26 of the gantry 16, and a punching machine 62 is attached to the other end portion 28 of the gantry 16. When the slope 12 is relatively soft, when the gantry 16 is moved to the slope 12, one end portion 26 of the gantry 16 is brought close to the slope 12, and a hole (not shown) is formed in the slope 12 by the self-drilling lock bolt 34. The lock bolt 34 is fixed in the hole, and the mount 16 is coupled to the lock bolt 34 by the coupling means 60. On the other hand, when the inclined surface 12 is relatively strong and it is difficult to make the hole in the inclined surface 12 by the self-drilling lock bolt 34, when the gantry 16 is moved to the inclined surface 12, first, the other end 28 of the gantry 16. Is made close to the slope 12, a hole is made in the slope 12 by the drilling machine 62, a self-drilling lock bolt 34 is advanced into the hole, and the lock bolt is fixed to the hole. Thereafter, the gantry 16 is rotated to bring one end portion 26 of the gantry 16 close to the inclined surface 12, and the gantry 16 is coupled to the lock bolt 34 by the coupling means 60.

  When the gantry 16 is fixed to the slope 12, instead of the example shown in FIG. 19 in which the gantry 16 is coupled to the lock bolt 34, a position on the ground 10 separated from the gantry 16 and the slope 12 is used in the example shown in FIG. Are connected using wire ropes 64 and 68. In this case, the weight 66 connected to the gantry 16 by the wire rope 64 may be sunk in the bottom of the dam lake 52, or the base ship 54 moored to the lake shore 56 may be connected by the wire rope 68. Good. When sinking the weight 66 to the bottom of the dam lake 52, the position is at the bottom of the dam lake 52, and the mount 16 is connected to the position via the wire rope 64 and the weight 66. When the gantry 16 and the base boat 54 are connected by the wire rope 68, the position is on the lake shore 56, and the base 16 is connected to the position via the wire rope 68 and the base boat 54. Depending on the direction of the external force that the gantry 16 receives from the excavator 32 while excavating the slope 12 with the excavator 32, the gantry 16 may try to rotate relative to the slope 12 due to the external force. The wire ropes 64 and 68 prevent the gantry 16 from rotating with respect to the slope 12. In the example shown in FIG. 19, the lock bolt 34 prevents the gantry 16 from rotating with respect to the slope 12.

  The excavator 32 includes a main body 70 on the gantry 16, an arm 72 attached to the main body, and a bucket 74 attached to the tip of the arm (FIG. 20). When excavating the slope 12 by the excavator 32, the excavator 32 pierces the slope 12 with a bucket 74 and draws the bucket toward the main body 70. At this time, the gantry 16 receives an external force from the main body 70 of the excavator 32, and the one end portion 26 of the gantry 16 is pressed against the slope 12 and receives a reaction force from the slope. For this reason, even if the gantry 16 is not fixed to the slope 12, the gantry 16 is not easily separated from the slope 12 when the slope 12 is excavated by the excavator 32. Therefore, after the excavator 32 is moved to the slope 12, before the excavator 32 excavates the slope 12, the gantry 16 is fixed to the slope 12, and the gantry 16 is not fixed to the slope 12. Good.

  Instead of the above example in which the bucket 74 is attached to the distal end portion of the arm 72 of the excavator 32, a breaker (not shown) may be attached to the distal end portion of the arm 72. In this case, when excavating the slope 12 with the excavator 32, the excavator 32 pierces the breaker 12 into the slope 12 and draws the breaker toward the main body 70. At this time, the gantry 16 receives an external force from the main body 70 of the excavator 32, and the one end portion 26 of the gantry 16 is pressed against the slope 12 and receives a reaction force from the slope. For this reason, even if the gantry 16 is not fixed to the slope 12, the gantry 16 is not easily separated from the slope 12 when the slope 12 is excavated by the excavator 32. Therefore, after the excavator 32 is moved to the slope 12, before the excavator 32 excavates the slope 12, the gantry 16 is fixed to the slope 12, and the gantry 16 is not fixed to the slope 12. Good.

DESCRIPTION OF SYMBOLS 10 Ground 12 Slope 14 Position 16 Base 22 Peripheral part 24 Notch part 32 Excavator 34 Rock bolt 36 Earth and sand 64, 68 Wire rope 48 Opening part

Claims (7)

A first step of placing a gantry at a position above the ground separated from the ground slope;
A second step of placing an excavator on the platform;
A third step of lifting the platform on which the excavator is mounted and moving the platform from the position to the slope;
A method for excavating a ground slope, comprising: a fourth step of excavating the slope with the excavator. The mount is a flat plate having a peripheral edge and a notch or an opening provided on the peripheral edge and opened outward of the peripheral edge.
Moving the mount to the slope so that the notch or the opening is close to the slope in the third step;
2. The method for excavating a ground slope according to claim 1, wherein after the fourth step, earth and sand generated by excavation of the slope are dropped onto the slope through the notch or the opening from the top of the mount.   The method for excavating a ground slope according to claim 1 or 2, comprising a fifth step of fixing the mount to the slope after the third step and before the fourth step. Fixing at least one lock bolt to the slope before the fifth step;
The method for excavating a ground slope according to claim 3, wherein the mount is coupled to the rock bolt in the fifth step.   The method for excavating a slope of the ground according to claim 3, wherein, in the fifth step, the base and the position on the ground separated from the slope are connected using a wire rope.   The method for excavating a ground slope according to any one of claims 1 to 5, wherein the slope is in water. A base for an excavator used for excavation of a ground slope,
A pedestal that is a flat plate having a peripheral part and a notch part or an opening part provided at the peripheral part and opened outward from the peripheral part.

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