JP4700089B2 - Cutting and removing underground obstacles from the surface - Google Patents

Description

The present invention relates to cutting dividing Sakata method of underground obstructions from the surface.

As a method for removing obstacles in the ground from the ground surface, there is an all casing method (for example, see Non-Patent Document 1).
Internet <URL: http://www.kisokyo.or.jp/stake02.htm>

  This all-casing method is a method for excavating obstacles in the ground by rotating a large-diameter casing (tube) with a strong rotational force. In FIG. 9, an example of the construction aspect of the all casing method is shown. As shown in FIG. 9, while a large-diameter casing (tube) is rocked (rotated) by the strong rotational force of the rocking device, it is press-fitted into the ground with a hydraulic jack, and the hammer grab is dropped into the casing. It excavates and discharges the earth and sand inside it and removes obstacles in the ground.

  However, in the conventional all-casing method, the hammer grab is dropped into the casing to excavate and discharge the earth and sand and remove the obstacles in the casing. It is very difficult to remove sheet piles. In addition, a large work site is required because large devices and equipment such as a large-diameter casing and a hammer grab are required.

The present invention has been made in view of the problems of the prior art as described above, and can remove all underground obstacles such as underground obstacles that have been aged and rusted and hardened in the ground. it is possible to perform the removal operation of underground obstacles easily in a narrow space (field) of, and to provide a cut dividing Sakata method of underground obstructions from the surface.

Disconnect apparatus for removing underground obstacles from the ground table were housed in the casing bore, a casing formed by a vertically movable nozzle block having at least one high pressure water jet nozzle, the longitudinal axis of the casing A chucking device having a grip jack for gripping the casing by extending and contracting a chucking block in a direction perpendicular to the chucking frame, and a swing frame having a swing jack for swinging the casing around the longitudinal axis And a guide frame provided with an elevating jack for elevating the casing held by the chucking device .

Further, the chucking device further Ru comprising a support frame for mounting the swing frame and the guide frame to the top end portion above the ground obstacles integrally.

The nozzle block may have two high-pressure water jet nozzles, one high-pressure water jet nozzle serving as a high-pressure water jet nozzle for excavation, and the other high-pressure water jet nozzle serving as a high-pressure water jet nozzle for cutting obstacles. can do. Moreover, the high pressure water jet nozzle for excavation and the high pressure water jet nozzle for obstacle cutting can inject ultra high pressure water. Also, the high-pressure water jet nozzle for cutting obstacles can inject ultra-high pressure water accompanied by an abrasive mixture that enhances the cutting ability of the steel structure and an abrasive mixture that helps increase the specific gravity. In this case, the mixture can be made into a mixed slurry containing an abrasive such as synthetic sapphire and a polymer by using the mixture as an abrasive.

The present invention is cut to remove underground obstacles by using a cutting apparatus for removing underground obstacles from the ground table, a cutting method for removing underground obstacles from the surface, the top end of the underground obstacle The step of checking the surface below or below the ground surface, the step of assembling the casing to the cutting and removing device, the lifting jack is fully extended, the casing is gripped by the chucking block, and the casing is A step of closely contacting the longitudinal axis, and a step of rotating the casing and lowering the lifting jack to a fully contracted position while jetting ultrahigh-pressure water accompanied by ultrahigh-pressure water or a mixture from a high-pressure water jet nozzle Releasing the gripping of the casing by the chucking block ;
The casing held by the chucking block is oscillated by the oscillating operation of the oscillating jack, and ultra high pressure water accompanied by the ultra high pressure water or the mixture is jetted from the high pressure water jet nozzle toward the underground obstacle. Cutting the underground obstacles ,
While pulling up on the ground obstacles raise the lifting jack with chucking block while holding the underground obstacle to Herba Asari state, comprises the steps of injecting a soil improvement material from the high-pressure water jet nozzle, the. As said underground obstruction, an H-type steel pipe, a steel sheet pile, etc. can be mentioned, for example.

According to the present invention, it is possible to remove all underground obstacles such as underground obstacles that have been aged and rusted by work from the ground surface such as road surfaces, and removal of underground obstacles in a narrow ground space (site). Work can be done easily.

Hereinafter, described with reference to the drawings best mode for carrying out the cutting removal Sakata method of underground obstacles from the surface according to the present invention. Figure 1 shows a schematic partial longitudinal sectional view of a cutting apparatus for removing underground obstacles from the ground table, FIG. 2 shows the schematic partial cross-sectional view. As shown in FIGS. 1 and 2, the cutting and removing device 1 mainly includes a casing 2, a chucking device 3, a swing frame 4, and a guide frame 5.

  A nozzle block 6 having at least one high-pressure water jet nozzle is housed in the inner cavity of the casing 2, and the casing 2 can move the nozzle block 6 up and down. The illustrated nozzle block 6 has two high-pressure water jet nozzles, one high-pressure water jet nozzle is a high-pressure water jet nozzle 7 for excavation, and the other high-pressure water jet nozzle is a high-pressure water jet for obstacle cutting. The nozzle 8 is convenient. The high-pressure water jet nozzle 7 for excavation and the high-pressure water jet nozzle 8 for cutting obstacles can inject ultra-high pressure water, or can inject ultra-high pressure water accompanied by a mixture. . The mixture may be a mixed slurry containing an abrasive (for example, a mixed slurry containing an abrasive and high specific gravity solution water). Details of the excavating high-pressure water jet nozzle 7 and the obstacle-cutting high-pressure water jet nozzle 8 will be described later.

  The chucking device 3 includes a grip jack 10 that extends and contracts a pair of chucking blocks 9 in a direction orthogonal to the longitudinal axis of the casing 2 and grips the casing 2 using hydraulic pressure. The grip jack 10 is configured such that the driving force of the rotary motor 13 is transmitted via a ring gear 11 and a pinion gear 12 that meshes with the ring gear 11. Accordingly, when the rotary motor 13 is driven to rotate, the grip jack 10 is rotated via the pinion gear 12 and the ring gear 11, so that the casing 2 gripped by the chucking block 9 of the grip jack 10 is moved in the longitudinal direction of the casing 2. It rotates around the central axis.

  The swing frame 4 is provided above the chucking device 3 and includes a swing jack 14 that swings the casing 2 around the longitudinal axis. The swing jack 14 has a swing chain belt 15 provided in the swing frame 4. The swing jack 14 can be connected to the grip jack 10 of the chucking device 3 by a swing torque transmission bolt 16 (see FIG. 1). Therefore, when the swing jack 14 is connected to the grip jack 10 of the chucking device 3 by the swing torque transmission bolt 16, the swing operation of the swing jack 14 by the driving force of the swing drive source (not shown). As a result, the casing 2 held by the chucking block 9 of the grip jack 10 can swing around the longitudinal axis of the casing 2. On the other hand, when the rocking torque transmission bolt 16 is manually removed, the function of the rocking jack 14 is released and the turning motor 13 turns (rotates) the casing 2 to rotate and excavate the casing during ascent and descent. And the function of the tricone bit is activated. During this swinging operation, the rotary motor 13 is not operated. Further, the swinging means that the clockwise rotation and the counterclockwise rotation of the casing 2 are alternately performed. For example, the half rotation of the clockwise direction and the counterclockwise direction is performed. Can do.

  The guide frame 5 includes a lifting jack 17 that lifts and lowers the casing 2 held by the chucking block 9 of the grip jack 10 of the chucking device 3. The lifting jack 17 extends in a direction perpendicular to the longitudinal axis of the casing 2, and a connection frame 18 connected to the chucking device 3 is attached thereto. Therefore, by moving the lifting jack 17 up and down, the casing 2 held by the chucking block 9 of the grip jack 10 of the chucking device 3 is lifted and lowered via the connecting frame 18 and the chucking device 3.

Further, the above-described chucking device 3, the swing frame 4 and the guide frame 5 are integrated by the support frame 19, and are installed on the ground surface above the top end portion of the underground obstacle. Yes.

The in ground obstacles, while indicating the H-type steel pipes, underground obstacles is not limited thereto. As shown in FIG. 3, first, in order to silently confirm the H-shaped steel pipe of the underground obstacle, a natural ground around the top end of the H-shaped steel pipe 100 is previously excavated (test hole (for example, about 2 m)). (Checking the top of the underground obstacle below or below the ground) Then, the support frame 19 of the cutting and removing device 1 in which the chucking device 3, the swing frame 4, and the guide frame 5 are integrated is installed above the top end portion of the H-shaped steel pipe 100.

  Then, the casing 2 is assembled to the cutting / removing device 1 (the step of assembling the casing to the cutting / removing device), and the high pressure generator 20 is passed through the ultrahigh pressure hose 21 to the high pressure water jet nozzle 7 for excavation and the high pressure water jet nozzle for cutting obstacles. 8 to each. As shown in FIGS. 1 and 3, the excavating high-pressure water jet nozzle 7 is directed downward along the longitudinal axis of the casing 2, while the obstacle-cutting high-pressure water jet nozzle 8 is disposed in the longitudinal direction of the casing 2. The direction is perpendicular to the direction axis. FIG. 8 shows an enlarged view of the tips of the excavating high-pressure water jet nozzle 7 and the obstacle-cutting high-pressure water jet nozzle 8. As clearly shown in FIG. 8, a support cover plate 22 is attached to the upper end portion of the casing 2, and each ultrahigh pressure hose 21 is fixed and attached to the support cover plate 22 with its tip penetrating. ing. Then, the pipes 23 and 24 of the excavating high-pressure water jet nozzle 7 and the obstacle-cutting high-pressure water jet nozzle 8 are connected to the distal ends of the ultra-high pressure hoses 21 by fastening means such as bolts and nuts, respectively. Yes. As described above, the high-pressure water jet nozzle 7 for excavation and the high-pressure water jet nozzle 8 for cutting an obstacle can inject ultra-high pressure water, or a high specific gravity polymer containing abrasive (abrasive) and It is possible to inject ultra-high pressure water accompanied by a mixture such as a mixed slurry. As is well known, a mixture such as a mixed slurry containing an abrasive is supplied to the nozzle through another pipe (not shown). As shown in FIG. 8, the casing 2 is connected by a joint pin 25 in order to correspond to the length corresponding to the excavation depth.

  After assembling the casing 2 to the cutting and removing device 1 and connecting the ultrahigh pressure generator 20 to the excavating high pressure water jet nozzle 7 and the obstacle cutting high pressure water jet nozzle 8 through the ultrahigh pressure hose 21 as described above. The lifting jack 17 is set to the maximum extension state, the casing 2 is gripped by the chucking block 9 of the grip jack 10, and the casing 2 is brought into close contact with the H-shaped steel pipe 100 substantially parallel to the longitudinal axis thereof (the maximum extension jack is A state where the casing is gripped by the chucking block, and the casing is brought into close contact with the underground obstacle substantially parallel to the longitudinal axis). Then, the casing 2 held by the chucking block 9 of the grip jack 10 is rotated (turned) through the pinion gear 12 and the ring gear 11 by the rotational driving force of the rotary motor 13, and the high pressure water jet nozzle 7 for excavation is used. The jet jack 17 is lowered to the most contracted position while jetting the super-high pressure water or the super-high pressure water accompanied by the mixture (the casing is rotated and the super-high-pressure water accompanied by the super-high-pressure water or the mixture from the high-pressure water jet nozzle) Cut the obstacles while spraying and lowering the lifting jack to the fully retracted position). Then, the gripping of the casing 2 by the chucking block 9 of the grip jack 10 is released (step of releasing the gripping of the casing by the chucking block). Thereafter, the casing 2 is driven to a predetermined position while repeating the above operation with the lifting jack 17 in the fully extended state. In this case, it is also possible to cut the obstacle vertically without rotating the casing 2.

Next, as shown in FIG. 4 (a), the swinging operation of the swinging jack 14 swings the casing 2 held by the chucking block 9 of the grip jack 10, and the high pressure water jet for cutting the obstacle. Ultra-high pressure water accompanied by ultra high-pressure water or a mixture is jetted from the nozzle 8 toward the H-type steel pipe 100 to cut the H-type steel pipe 100 (the casing gripped by the chucking block by the swing operation of the swing jack). And cutting the underground obstacle by spraying the ultrahigh pressure water accompanied by the ultrahigh pressure water or the mixture from the high pressure water jet nozzle toward the underground obstacle). The rocking speed at the time of cutting can be, for example, 0.006 to 5 rpm, and at the time of cutting the distal portion of the H-shaped steel pipe 100, the rocking speed is 0.006 rpm, When cutting the part, the rocking speed can be 5 rpm.

  When the cutting process is completed as described above, the casing 2 is pulled out. As shown in FIG. 4B, first, the lifting jack 17 is raised to the fully extended state, and the casing 2 gripped by the chucking block 9 of the grip jack 10 is pulled up. When the lifting jack 17 reaches the maximum extension state, the gripping of the casing 2 by the chucking block 9 of the grip jack 10 is released, and then the lifting jack 17 is lowered to the fully contracted position. Then, with the casing 2 being gripped by the chucking block 9 of the grip jack 10, the lifting jack 17 is raised to the fully extended state and the casing 2 is pulled up. The casing 2 is pulled out by repeating this operation.

Next, the removal (removal) step of the cut H-shaped steel pipe 100 (underground obstacle) and the ground improvement step during or after the removal step will be described. As shown in FIG. 5A, an H-shaped steel pipe 200 having a length of about 1 m, for example, is connected to the top end of the H-shaped steel pipe 100 by welding, and the H-shaped steel pipe 200 is cut and removed. 1, the lifting jack 17 is brought into the most contracted state, and the H-shaped steel pipe 200 is gripped by the chucking block 9 of the grip jack 10. Next, the casing 2 is dropped to a predetermined position along the H-shaped steel pipe, and the H-shaped steel pipe and the casing 2 are connected and fixed by the connecting jig 30 as shown in FIGS. The excavation high-pressure water jet nozzle 7 is supplied with a ground improvement material 31 from a ground improvement material supply device (not shown) to the excavation high-pressure water jet nozzle 7 through a hose. FIG. 6 shows a connection state when viewed from the arrow A in FIG.

Next, as shown in FIGS. 5B and 5C, the H-shaped steel pipe gripped by the chucking block 9 of the grip jack 10 is pulled up while raising the lifting jack 17 to the maximum extension state, and a high-pressure water jet for excavation. A ground improvement material 31 containing a curing agent or the like is sprayed (injected) from the nozzle 7. And if the raising / lowering jack 17 will be in the maximum extension state, after the holding | grip of the H-type steel pipe by the chucking block 9 of the grip jack 10 will be released, the raising / lowering jack 17 will be lowered | hung to the most contracted position. Then, the ground improvement material 31 is injected from the high pressure water jet nozzle 7 for excavation while raising the lifting jack 17 to the fully extended state while holding the H-shaped steel pipe with the chucking block 9 of the grip jack 10 and pulling up the H-shaped steel pipe. And inject. By repeating this operation and improving the ground while pulling out the H-shaped steel pipe, the ground in the excavation cutting area can be replaced with a new ground, so that the ground is raised, the ground is softened, or the ground is depressed. Etc. can be prevented. In the above-described removal process and the ground improvement process, the chucking block 9 is configured to have a shape capable of gripping an underground obstacle. In the above description, the ground improvement material 31 is jetted from the high pressure water jet nozzle 7 for excavation. However, the present invention is not limited to this, and the ground improvement material 31 can be jetted from the high pressure water jet nozzle 8 for obstacle cutting. Moreover, the ground improvement material 31 can be injected from both the high pressure water jet nozzle 7 for excavation and the high pressure water jet nozzle 8 for obstacle cutting.

Moreover, in embodiment mentioned above, although an H type steel pipe is illustrated and demonstrated as an underground obstruction, an underground obstruction is not limited to an H type steel pipe, and this invention is applied to all underground obstructions. Applicable. For example, when the underground obstacle is a steel pipe filled with mortar, a tricone bit (excavation cutting edge) 40 is attached to the tip of the casing 2 as shown in FIG. The core can be drilled to make cutting work more efficient, and then the steel pipe can be cut.

Figure 1 is a schematic partial longitudinal sectional view showing a cutting removal equipment underground obstructions from the ground table. FIG. 2 is a schematic partial cross-sectional view of FIG. FIG. 3 is a partial cross-sectional side view of FIG. 4 (a) is another partial cross-sectional side view, FIG. 4 (b) is another partial cross-sectional side view in further. 5 (a) is another partial cross-sectional side view of the al, FIG. 5 (b) is another partial cross-sectional side view of the al, FIG. 5 (c), is different in al It is a partial cross section side view. FIG. 6 is another schematic partial cross-sectional view. Figure 7 is a plan view showing an example of a possible applicable connecting jig. FIG. 8 is a sectional view showing an example of a high-pressure water jet nozzle applicable to the present invention. FIG. 9 is a schematic view showing an example of a construction mode of a conventional all casing method.

DESCRIPTION OF SYMBOLS 1 Cutting removal apparatus 2 Casing 3 Chucking apparatus 4 Oscillating frame 5 Guide frame 6 Nozzle block 7 High-pressure water jet nozzle for excavation 8 High-pressure water jet nozzle for obstacle cutting 9 Chucking block 10 Grip jack 11 Ring gear 12 Pinion gear 13 Rotating motor 14 Oscillating jack 15 Oscillating chain belt 16 Oscillating torque transmission bolt 17 Lifting jack 18 Connecting frame 19 Support frame 20 Ultra high pressure generator 21 Ultra high pressure hose 22 Support cover plate 23 Pipe 24 Pipe 30 Connecting jig 31 Ground improvement Material 40 Triconbit 100 H type steel pipe

Claims (1)

Cutting to remove underground obstacles by using a cutting apparatus for removing underground obstacles from the ground table, a cutting method for removing underground obstacles from the surface,
Checking the top of the underground obstacle below or below the ground surface;
Assembling the casing to the cutting and removing device;
Bringing the lifting jack to its maximum extension state, gripping the casing with the chucking block, and closely contacting the casing with the underground obstacle substantially parallel to its longitudinal axis;
Rotating the casing and lowering the lifting jack to the most contracted position while spraying the ultrahigh pressure water or the ultrahigh pressure water accompanied by the mixture from the high pressure water jet nozzle;
Releasing the gripping of the casing by the chucking block ;
The casing held by the chucking block is oscillated by the oscillating operation of the oscillating jack, and ultra high pressure water accompanied by ultra high pressure water or a mixture is jetted from the high pressure water jet nozzle toward the underground obstacle. Cutting the underground obstacle,
Injecting the ground improvement material from the high-pressure water jet nozzle while raising the lifting jack to the fully extended state while holding the underground obstacle with the chucking block,
A method for cutting and removing underground obstacles from the surface, characterized by comprising:

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