JP4942016B2 - Method for press-fitting rectangular casing tube, soil replacement method, and tubing device for performing these methods - Google Patents

Description

The present invention is related to tubing equipment to implement the method of press-fitting rectangular casing tube, a soil replacement method and these methods.

  A tubing device (casing driver) used in the all casing method is provided with a rotating body provided with a plurality of chucks for gripping the outer surface of a casing tube, a lifting frame for rotatably supporting the rotating body, and the lifting frame. A rotation drive device that rotates the rotating body, a base frame in which an elevating cylinder of the elevating frame is erected, and a chuck frame that operates the chuck, and a casing insertion provided so as to penetrate each frame The casing tube inserted into the hole is gripped with a chuck, and the casing tube is pressed into the ground by lowering the lifting frame with the lifting cylinder while rotating the rotating body with the rotation drive device. By attaching a chuck collar to the To single tube so that it corresponds (e.g., see Patent Document 1.).

  Further, as a gripping means for a casing tube in a tubing device (casing driver), a plurality of chuck members (band members) formed in an arc shape are connected in a circular shape, and the chuck member is formed to be expandable / contractible by a cylinder. The thing of the structure which hold | grips a tube is also known (for example, refer patent document 2).

On the other hand, in recent years, soil contamination in factory sites and the like has become a problem, and ground improvement work is being performed to improve soil or replace contaminated soil with high-quality soil. When there is a building around the soil when replacing the soil, the ground will collapse if the entire soil is excavated, so the all-casing method is applied, and the contaminated soil in the casing tube is excavated and discharged while protecting with the casing tube. The whole soil is replaced with good quality soil by repeatedly performing the work of replacing with good quality soil (see, for example, Patent Document 3).
JP 2003-313869 A Japanese Patent Laid-Open No. 9-316881 JP 2002-70469 A

  However, in a general all casing method, a cylindrical casing tube made of a steel pipe or the like is used. Therefore, when replacing the entire soil, the entire soil cannot be replaced unless the construction site is considerably wrapped. Therefore, the high-quality soil in the lapped portion is excavated while being mixed with contaminated soil during the next excavation, which increases the amount of soil that must be treated as industrial waste and increases the processing cost. The work efficiency was not good.

Accordingly, the present invention can improve efficiency when replacing contaminated soil with high-quality soil without requiring a special dedicated machine, and can reduce processing costs by reducing the amount of soil removed. press-fitting method, has an object to provide a chuck color tubing equipment to carry out soil replacement method and these methods.

In order to achieve the above object, a method for press-fitting a rectangular casing tube according to the present invention includes a rotating body provided with a plurality of chucks for gripping the outer surface of the casing tube, an elevating frame that rotatably supports the rotating body, and the elevating / lowering frame. A method for press-fitting a rectangular casing tube by a tubing device, comprising: a rotation drive device provided on a frame for rotating the rotating body; a base frame in which an elevating cylinder of the elevating frame is erected; and a chuck frame for operating the chuck. The rectangular casing tube is inserted into the casing insertion hole provided in the central part of each frame of the chuck frame, the lifting frame and the base frame, and each corner portion of the rectangular casing tube inserted into the casing insertion hole On the inside of the chuck at the position corresponding to A chuck collar having a gripping surface having a shape corresponding to the outer surface of the corner of the single tube is attached, and with the lifting frame and the chuck frame raised, the chuck frame is lowered toward the lifting frame, The square casing tube is brought into a state of gripping the square casing tube by pressing the outer surface of each corner of the square casing tube with the gripping surface of each chuck collar, and the lifting frame is lowered by contracting the lifting cylinder. It is characterized by being pressed into the ground . Further, during the press-fitting of the rectangular casing tube, the rectangular casing tube can be swung around the axis by operating the rotary drive device in both forward and reverse directions. Further, the soil replacement method excavates and discharges the contaminated soil in the square casing tube that has been press-fitted by a predetermined amount by the above-mentioned square casing tube press-in method, and repeats this press-fitting and excavation and soiling operations to form the square casing tube. After excavating and discharging the contaminated soil by press-fitting to a depth, the rectangular casing tube is pulled out while introducing high-quality soil into the rectangular casing tube .

Further, a tubing apparatus for performing the above-described method, the rotating body provided with a plurality of chucks for gripping the outer surface of the casing tube, a lifting frame that rotatably supports the rotating body, and a lifting frame that is provided on the lifting frame. The chuck frame, the lift frame, and the base in a tubing device comprising: a rotation drive device that rotates the rotating body; a base frame that is provided with a lift cylinder of the lift frame; and a chuck frame that operates the chuck. A chuck having a gripping surface having a shape corresponding to the outer surface of the corner of the rectangular casing tube at a position corresponding to each corner of the rectangular casing tube inserted through the casing insertion hole provided in the center of each frame of the frame A collar is provided, and the chuck collar moves the chuck in and out. The bolts passing is characterized in that each attached to the inner peripheral surface of the chuck. In addition, the rotational drive device can be operated in both forward and reverse directions to swing the rectangular casing tube around the axis .

According to the present invention, a square casing tube, particularly a square casing tube, can be used to perform soil replacement work. Therefore, the wrap when replacing contaminated soil with good quality soil can be reduced, and industrial The amount of soil that must be treated as waste can be greatly reduced, and costs such as treatment costs can be reduced. Further, the press-fitting resistance can be reduced by swinging the square casing tube during press-fitting, and the press-fitting of the square casing tube can be easily performed.

  1 to 4 show an example of a tubing device to which a chuck collar of the present invention is attached. FIG. 1 is a plan view, FIG. 2 is a partially sectional front view, and FIG. FIG. 4 is an explanatory view showing a swinging state of the casing tube, and FIG. 5 is an explanatory view showing a state in which a chuck collar for a flat portion is added. Moreover, FIG. 6 is explanatory drawing which shows the construction state when a cylindrical casing tube is used, and FIG. 7 is explanatory drawing which shows the construction state when a square prismatic casing tube is used.

  First, in the tubing device 11 shown in the present embodiment, a vertically movable frame 14 and a chuck frame 15 are attached to four elevators 13 erected on a base frame 12 installed on the ground so as to be movable up and down. . In the elevator 13, a first guide cylinder 17 fixed to the elevator frame 14 is slidably fitted to the outside of the post 16 to which the base frame 12 is fixed, and a chuck frame is attached to the upper outer side of the first guide cylinder 17. A second guide cylinder 18 to which 15 is fixed is slidably fitted.

  An elevator cylinder 19 is housed inside the elevator 13, one end being fixed to the post 16 and the other end being fixed to the upper portion of the first guide cylinder 17. The elevating frame 14 and the chuck frame 15 move up and down with respect to the base frame 12 while being guided by the guide cylinder 17 by the expansion and contraction of the elevating cylinder 19. The elevating frame 14 and the chuck frame 15 are connected by a chuck cylinder 20, and the chuck frame 15 moves up and down with respect to the elevating frame 14 while being guided by the guide cylinder 18 by expansion and contraction of the chuck cylinder 20.

  Casing insertion holes 12a, 14a, and 15a are respectively provided in the central portions of the respective frames 12, 14, and 15, and the elevating frame 14 is provided with bearings 21 that are provided along the periphery of the casing insertion hole 14a. The lower rotating body 22 is provided so as to be rotatable with respect to the lifting frame 14. In addition, the lifting frame 14 is provided with four hydraulic motors 24 that rotationally drive the lower rotating body 22 via a reduction gear 23.

  On the other hand, the upper rotating body 26 is provided in the chuck frame 15 so as to be rotatable with respect to the chuck frame 15 via a bearing 25 provided along the periphery of the casing insertion hole 15a. On the upper rotating body 26, chucks 28 are suspended at eight locations at equal intervals in the circumferential direction via links 27.

  The outer peripheral surface of the chuck 28 is a tapered surface 28 a inclined downward toward the inner peripheral side. The chuck 28 can be fitted into the inner peripheral surface of the lower rotating body 22, and corresponds to the tapered surface 28 a of the chuck 28. A tapered groove 22b in which a tapered surface 22a is formed is provided. When the chuck cylinder 20 is contracted and the chuck frame 15 is lowered toward the elevating frame 14, the chuck 28 fitted into the tapered groove 22b of the lower rotating body 22 is lowered, and the chuck 28 is acted by the action of both tapered surfaces 22a and 28a. Moves toward the center, thereby pressing and gripping the casing tube inserted through the casing insertion holes 12a, 14a, 15a in the axial direction.

  On the inner peripheral surface of the chuck 28, a curved surface 28b corresponding to the outer surface shape of the casing tube of the maximum diameter that can be used in the tubing device 11 is formed. Further, the chuck 28 is provided with two bolt holes 29 penetrating in the inner and outer directions, and the chuck collar 31 can be attached to the inner peripheral surface of the chuck 28 by a bolt 30 inserted through the bolt hole 29. ing.

  When a square prismatic casing tube 32 is used as the casing tube, the chuck collar 31 includes a base portion 31a fixed to the chuck 28 by the bolt 30 and an equilateral side corresponding to the outer surface of the corner portion 32a of the rectangular casing tube 32. An outer surface portion of the base portion 31 a is formed on a curved surface 31 c corresponding to the curved surface 28 b of the chuck 28.

  The chuck collar 31 formed in this manner has a circumferential direction corresponding to the corner portion 32a of the rectangular casing tube 32 inserted into the casing insertion holes 12a, 14a, and 15a among the chucks 28 provided at eight locations in the circumferential direction. It is attached to each of the four chucks 28 at 90 degree intervals. That is, the curved surface 28b on the inner side of the chuck 28 and the curved surface 31c on the outer side of the chuck collar 31 are brought into close contact with each other, and the bolt 30 inserted through the bolt hole 29 is screwed into the female screw hole of the base portion 31a. 31 is fixed to the chuck 28.

  When the rectangular casing tube 32 is gripped by the chuck collar 31 formed in this way, a large force in the compression direction acts on the rectangular casing tube 32 from the chuck collar 31. At this time, if the flat portion at the center of each side of the rectangular casing tube 32 is gripped, a force in the bending direction acts on each side, and each side of the rectangular casing tube 32 is easily deformed inward. It is necessary to form the tube 32 with a thick plate. On the other hand, in the present invention, the chuck collar 31 grips the corner portion 32a of the rectangular casing tube 32, so that the compressive force from the chuck collar 31 acts in the direction of compressing each side of the rectangular casing tube 32. Thus, deformation of each side of the rectangular casing tube 32 is suppressed, and the plate thickness of the rectangular casing tube 32 can be reduced.

  As shown in FIG. 3, the excavation and excavation of the contaminated soil with the tubing device 11 using the square casing tube 32 can be performed basically in the same manner as when a conventional cylindrical casing tube is used. . First, as shown in FIG. 3A, the chuck cylinder 20 is contracted in a state where the lift cylinder 19 and the chuck cylinder 20 are extended and the lift frame 14 and the chuck frame 15 are lifted. As a result, as shown in FIG. 3B, the chuck frame 15 is lowered toward the elevating frame 14, and the chuck 28 is moved in the inner circumferential direction by the action of the tapered surfaces 22a and 28a. The gripping surface 31 b comes into pressure contact with the outer surface of the corner portion 32 a of the square casing tube 32 to grip the square casing tube 32.

  When the lifting / lowering cylinder 19 is contracted with the chuck collar 31 holding the rectangular casing tube 32, as shown in FIG. 3C, the lifting / lowering frame 14 is lowered so that the square casing tube 32 receives pressure input to the ground. It acts and the square casing tube 32 can be press-fitted into the ground. As shown in FIG. 3 (D), the contaminated soil in the rectangular casing tube 32 is excavated and discharged using an excavator 33 such as a hammaglab in a state where the rectangular casing tube 32 is press-fitted in a predetermined amount. Then, the chuck cylinder 20 is extended to release the gripping state of the chuck collar 31, and the lift cylinder 19 is extended to lift the lift frame 14, thereby returning to the state shown in FIG.

  3A to 3D are repeated to press-fit the rectangular casing tube 32 to a predetermined depth to excavate and discharge the contaminated soil, and then insert the high-quality soil into the rectangular casing tube 32 and square casing. By pulling out the tube 32, the contaminated soil in the portion surrounded by the rectangular casing tube 32 can be replaced with high-quality soil. Furthermore, the place of the tubing apparatus 11 is moved and the whole soil is replaced with good quality soil.

  Further, during press-fitting of the rectangular casing tube 32, rotation is performed to rotate the lower rotating body 22 in both forward and reverse directions via the reduction gear 23 by supplying hydraulic pressure to the hydraulic motor 24 in both forward and reverse directions as necessary. As shown in FIG. 4, the square casing tube 32 can be swung around the axis via the chuck 28 and the chuck collar 31 fitted into the tapered groove 22 b of the lower rotating body 22. Thereby, the contact state between the peripheral surface of the rectangular casing tube 32 and the ground can be released, and the press-fitting resistance of the rectangular casing tube 32 can be reduced, and the rectangular casing tube 32 can be easily press-fitted. Become. Further, when the strength of each side is sufficient, such as when the rectangular casing tube 32 is formed of a thick plate, as shown in FIG. 5, a flat portion chuck collar 34 having a flat gripping surface 34a is used. It is also possible to increase the overall gripping force by gripping the central part of each side of 32.

Here, the state at the time of replacing the whole soil of the land 41 of the square whose side is 3750 mm with high quality soil will be described. First, FIG. 6 shows a case where a cylindrical casing tube having a diameter of 1800 mm is used. In order to replace the whole soil, a wrap part 42 shown with hatching in FIG. 6 and a protruding part 43 outside the land are shown. Nine locations must be constructed including Therefore, the construction area is ((1800 mm / 2) ² × π × 9), which is about 23 m ² . On the other hand, as shown in FIG. 7, when a square casing tube having a side of 1300 mm (diagonal length of about 1800 mm) is used, even if the lap portion 42 and the protruding portion 43 are each about 50 mm, nine constructions are performed as described above. Therefore, the construction area is (1300 × 1300 × 9), which is about 15 m ² .

  Therefore, the construction area becomes (15/23), which can be reduced to about 65%. If the construction depth is equivalent, the amount of high-quality soil required for replacement and the amount of soil discharged should be about 2/3. The amount that must be treated as industrial waste and the cost of transporting them can be greatly reduced. In addition, since the amount of discharged sand and sand is reduced, construction time can be shortened and work efficiency can be improved, and construction costs when replacing contaminated soil with high-quality soil can be greatly reduced. It becomes possible.

  In this embodiment, a full-rotation type tubing device provided with a hydraulic motor for rotating the casing tube is exemplified as the tubing device, and an example in which chucks are disposed at 8 locations has been described. When a square casing tube having a square shape is used, it is desirable that the number of chucks is a multiple of 4, and when a rectangular rectangular casing tube is used, the number of chucks is an even number. It is desirable to be.

  Further, various types of tubing devices (casing drivers) can be used. For example, as described in Patent Document 2, a plurality of chuck members (band members) formed in an arc shape are used. In a tubing device having a so-called band-type chuck device, a casing driver, etc., in which a chuck member is formed so as to be able to expand and contract by a cylinder, and a cylinder tube is operated and a casing tube is tightened by the chuck member. It is also possible to attach it inside the chuck member.

  Also, the chuck collar may be fixed to the chuck or the chuck member in any manner, and the chuck collar may be connected to the chuck or the chuck member in a swingable state. As shown, when the first chuck collar and the second chuck collar are used as the chuck collars, it is sufficient that the second chuck collar on the inner peripheral side can grip the corners of the rectangular casing tube. The number of the first chuck collars arranged may be arbitrary. The casing tube swinging means may be a cylinder instead of a hydraulic motor.

It is a top view which shows one example of the tubing apparatus which attached the chuck | zipper collar of this invention. It is a partial cross section front view similarly. It is explanatory drawing of the construction work which excavates and discharges contaminated soil. It is explanatory drawing which shows the rocking | fluctuation state of a casing tube. It is explanatory drawing which shows the state which added the chuck | zipper collar for plane parts. It is explanatory drawing which shows a construction state when using a cylindrical casing tube. It is explanatory drawing which shows a construction state when a square prismatic casing tube is used.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Tubing apparatus, 12 ... Base frame, 13 ... Elevator, 14 ... Elevating frame, 15 ... Chuck frame, 12a, 14a, 15a ... Casing insertion hole, 16 ... Post, 17 ... First guide cylinder, 18 ... Second guide Cylinder, 19 ... Elevating cylinder, 20 ... Chuck cylinder, 21 ... Bearing, 22 ... Lower rotating body, 22a ... Tapered surface, 22b ... Tapered groove, 23 ... Reduction gear, 24 ... Hydraulic motor, 25 ... Bearing, 26 ... Upper rotation Body, 27 ... Link, 28 ... Chuck, 28a ... Tapered surface, 28b ... Curved surface, 29 ... Bolt hole, 30 ... Bolt, 31 ... Chuck collar, 31a ... Base, 31b ... Gripping surface, 31c ... Curved surface, 32 ... Square casing tube, 32a ... corner, 33 ... excavator, 34 ... chuck collar for flat surface, 34a ... gripping surface, 41 ... earth , 42 ... the lap portion, 43 ... protruding portion

Claims (5)

A rotating body provided with a plurality of chucks for gripping the outer surface of the casing tube, an elevating frame that rotatably supports the rotating body, a rotation drive device that is provided on the elevating frame and rotates the rotating body, and the elevating and lowering In a method of press-fitting a rectangular casing tube by a tubing device comprising a base frame in which a lifting cylinder of the frame is erected and a chuck frame for operating the chuck,
A rectangular casing tube is inserted into a casing insertion hole provided in a central portion of each frame of the chuck frame, the lifting frame, and the base frame, and corresponds to each corner of the rectangular casing tube inserted into the casing insertion hole. A chuck collar with a gripping surface with a shape corresponding to the outer surface of the corner of the rectangular casing tube is attached to the inside of the chuck at the position where
In a state where the lifting frame and the chuck frame are raised, the chuck frame is lowered toward the lifting frame, and the outer surface of each corner portion of the rectangular casing tube is pressed against the gripping surface of each chuck collar to form a rectangular casing. A method for press-fitting a rectangular casing tube, wherein the rectangular casing tube is pressed into the ground by holding the tube and contracting the elevating cylinder and lowering the elevating frame . During press-fitting of the prismatic casing tube, the rotary drive device by actuating the forward and reverse directions, press fitting of claim 1, wherein the rectangular casing tube, characterized in that oscillating the prismatic casing tube around the axis Way . The contaminated soil in the square casing tube that has been press-fitted by a predetermined amount by the press-fitting method of the square casing tube according to claim 1 or 2 is excavated and discharged. A soil replacement method characterized in that, after press-fitting and excavating and discharging contaminated soil, the rectangular casing tube is pulled out while pouring high quality soil into the rectangular casing tube . A tubing apparatus for performing the method according to claim 1, wherein a rotating body provided with a plurality of chucks for gripping an outer surface of a casing tube, a lifting frame for rotatably supporting the rotating body, and the lifting / lowering A tubing device comprising: a rotation driving device provided on a frame for rotating the rotating body; a base frame in which an elevating cylinder of the elevating frame is erected; and a chuck frame for operating the chuck;
At the corner outer surface of the rectangular casing tube at a position corresponding to each corner of the rectangular casing tube inserted through the casing insertion hole provided at the center of each frame of the chuck frame, the lifting frame and the base frame. A chuck collar having a gripping surface of a corresponding shape is provided, and the chuck collar is attached to the inner peripheral surface of the chuck by a bolt that penetrates the chuck in the inner and outer directions. Tubing device . 5. The tubing device according to claim 4, wherein the rotational drive device is operated in both forward and reverse directions to swing the rectangular casing tube about an axis .

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