JP6170408B2 - CD machine and CD machine installation stand - Google Patents

Description

  The present invention relates to a casing driver (hereinafter referred to as a “CD machine”) used for press-fitting and drawing of a casing (hereinafter referred to as “casing”) such as a large-diameter steel pipe or steel pipe pile in construction or civil engineering foundation work and the CD. Concerning the CD machine installation stand for installing the machine, removal of underground obstacles (especially strong existing structures consisting of SRC structures, deep ground piles, etc.) and cast-in-place concrete, especially at locations very close to the site boundary Suitable for pile construction.

  In the foundation work of construction and civil engineering, when removing underground obstacles in urban redevelopment or constructing cast-in-place concrete piles considering the surrounding ground, for example, while rotating the casing 9 as shown in FIG. The inside of the casing 9 is excavated and earthed with a hammer grab 10 while protecting the hole wall with the casing 9, and the underground obstacles are removed or the vertical holes for cast-in-place piles are formed. A circumferential casing method (CD method) is known.

  In the present construction method, the CD machine 11 is used particularly for press-fitting and drawing-out of the casing 9.

  In general, the CD machine 11 has, for example, a substantially rectangular frame shape as shown in FIGS. 5 (a) and 5 (b), a base plate 12 having a space portion A in which a casing 9 is built in the center, and a base plate 12 And a CD machine main body 13 that press-fits and pulls out the casing 9.

  The base plate 12 is provided with a horizontal adjustment mechanism for adjusting the attitude of the CD machine body 13 horizontally, and a horizontal adjustment jack cylinder 14 constituting the horizontal adjustment mechanism is installed at each corner, and a casing inclinometer (see FIG. (Omitted) is installed.

  The CD machine body 11 has a plurality of guide posts (not shown) installed symmetrically with respect to the center of the space A on the base plate 12, and a lifting frame that is guided by the guide posts and moves up and down on the base plate 12. 15 and a plurality of thrust cylinders 16, 16 for moving the lifting frame 15 up and down.

  The lifting frame 15 is provided with a casing gripping mechanism for gripping the casing 9 built in the space A. The casing gripping mechanism includes a grip band 17 for gripping the casing 9 from the side and a band cylinder 18 for operating the grip band 17.

  The elevating frame 15 is provided with a casing rotating device for rotating the casing 9. The casing rotating device includes a rotating body (not shown) that rotates the casing 9 strongly held by the holding band 17 together with the rotating body (not shown) and a hydraulic motor (not shown) for rotating the casing 9. .

  In such a configuration, the casing 9 penetrating the lifting frame 15 and built in the space A of the base plate 12 is gripped by the casing gripping band 17, the hydraulic motor is operated, and the rotating body is rotated to rotate the casing 9. Is rotated together with the casing gripping band 17.

  Then, by operating the thrust cylinders 16 and 16 to lower the elevating frame 15, the casing 9 can be press-fitted while rotating into the ground.

  Further, the vertical hole can be excavated by excavating and discharging the inside of the casing 9 with the hammer grab 10.

  By the way, when removing underground obstacles or constructing cast-in-place concrete piles in urban redevelopment, the CD machine 11 may be installed near the site boundary line to perform these constructions.

JP 61-270418 A JP 05-331853 A

However, if the outside of the site boundary is someone else's site or a public road, the CD machine cannot be installed outside the site.

  For this reason, if an underground obstacle is buried very close to the site boundary, the underground obstacle may not be completely removed. In addition, cast-in-place concrete piles could not be constructed very close to the site boundary.

  Furthermore, even if the CD machine is installed outside the boundary line of the site, if the foundation for installation is formed, it will be necessary to restore it to its original state after the construction is completed. I needed it.

  The present invention has been made to solve the above-described problems. Particularly, even when a CD machine is installed outside the boundary line of the site, a special method such as forming a foundation for installation outside the site is provided. The purpose is to provide a CD machine and a CD machine installation stand that can be installed without adding.

  The present invention is a CD machine installation stand for installing a CD machine and a CD machine used for press-fitting and withdrawing a casing, which is installed outside the site boundary line. In particular, the CD machine installation stand is located inside the site boundary line. A pair of gantry main bodies installed in parallel in the direction of the premises boundary line, and installed between the ends of the gantry body on the site boundary side and the opposite ends of the gantry body And a plurality of connecting beams for connecting the gantry main bodies to each other.

  Further, a space for installing the casing is provided between the gantry main bodies, and an overhanging portion for installing the premises boundary side of the CD machine at the premises boundary side of the gantry main body is the site. It protrudes outside the boundary line.

  The gantry body is configured as a floor portion for installing the CD machine and a base portion for supporting the floor portion, and both can use a mountain retaining material such as an H-shaped steel.

  In addition, connecting bolts or welding can be used for joining the mountain retaining materials. In particular, the connecting bolts can be easily assembled by using the bolt holes of the mountain retaining materials, and the mountain retaining materials after disassembly are the original mountain retaining materials. It can be used as a material.

  Shaped steel such as channel steel can be used for the connecting beam, and it can be joined to the retaining material constituting the floor portion and the base portion by connecting bolts or welding as with the retaining material.

  In addition, it can be partially reinforced by installing jack cylinders and stiffeners at the position where concentrated load acts by installing the CD machine of the mountain retaining material that constitutes the floor part and base part of the gantry body .

  The structure or shape of the CD machine is not particularly limited as long as it is within the size that can be installed on the CD machine installation base.

  According to the CD machine and the CD machine installation stand of the present invention, even when the CD machine is installed outside the site boundary line, the CD machine is not used without special measures such as forming a foundation for installation outside the site. The machine can be installed.

  This makes it possible to reliably remove underground obstacles buried at the very edge of the site boundary line, and to form structures such as cast-in-place concrete piles at positions very close to the site boundary line.

It is a perspective view which shows one Embodiment of CD machine installation stand of this invention. FIG. 2 (a) is a plan view and FIG. 2 (b) is a front view as seen from the site boundary side, showing an embodiment of the CD machine installation stand of the present invention. FIG. 3 shows an embodiment of the CD machine installation stand of the present invention, FIG. 3 (a) is a rear view of the CD machine installation stand seen from the side opposite to the site boundary side, and FIG. 3 (b) is a diagram of the CD machine installation stand. It is a side view. It is explanatory drawing which shows the foundation construction by CD construction method. FIG. 5 (a) is a plan view and FIG. 5 (b) is a side view showing an example of a CD machine.

  1 to 3 show a CD machine installed at a position very close to the site boundary line, and the CD machine is installed on a CD machine installation base 1 installed almost in contact with the site boundary line.

  The CD machine installation base 1 is composed of a pair of base bodies 2 and 2 laid in parallel in the direction of the site boundary, and between the ends of the base units 2 and 2 on the site boundary side and the opposite ends. It is composed of a plurality of connecting beams 3 that are respectively bridged and a plurality of connecting beams 4 that are respectively bridged at the ends of the gantry main bodies 2 and 2 on the site boundary line side.

  Further, a space A for installing the casing 9 is provided between the gantry main bodies 2 and 2, and the connecting beam 3 spanned on the opposite side of the site boundary line is spanned in two stages. .

  More specifically, each gantry body 2 is composed of a floor portion 5 for installing one end of the CD machine and a base portion 6 for supporting the floor portion 5, both of which are H-shaped steel having end plates at both ends. It is formed from a plurality of mountain stoppers 7 made of, for example.

  The mountain retaining material 7 is laid substantially at right angles to the site boundary line, and is laid in a state where the upper and lower flanges face each other in the flange width direction. Further, each mountain retaining material 7 constituting the floor portion 5 is laid on each mountain retaining material 7 constituting the base portion 6.

  Further, each mountain retaining material 7 constituting the floor portion 5 is longer than each mountain retaining material 7 constituting the base portion 6, and accordingly, the end portion on the site boundary line side protrudes ahead of the site boundary line, thereby the floor portion 5. A projecting portion 5a that protrudes a predetermined length (about 50 cm) ahead of the site boundary is formed at the end of the site boundary.

  In this way, the overhanging portion 5a that protrudes beyond the site boundary line is formed, so that the CD machine can be installed with a part of the CD machine protruding outside the site boundary line. Even in the foundation work at a position very close to the boundary line, it is possible to remove the underground obstacles buried at the marginal position of the site boundary and to construct the cast-in-place concrete pile at the marginal position of the site boundary without difficulty.

  Both ends of the connecting beam 3 spanned between the ends of the gantry body 2, 2 on the site boundary line side are below the mountain retaining materials 7, 7 constituting the floor 5 of each gantry body 2, 2. They are integrally connected by welding or connecting bolts.

  Further, the connecting beam 4 spanned on the end of the gantry body 2, 2 on the site boundary line side is integrally connected to the end of each retaining member 7 constituting the base portion 6 by welding or a joining bolt. ing.

  As a result, the ends of the gantry main bodies 2 and 2 on the site boundary line side are integrally connected by the connecting beam 3 and the connecting beam 4, and the mountain retaining materials 7 constituting the floor portion 5 and the base portion 6 of each pedestal 2 are connected. Are connected together.

  In addition, both ends of the upper and lower connecting beams 3, 3 spanned on the opposite side of the site boundary line are connected to the end portions of the retaining members 7 constituting the floor portion 5 and the retaining members constituting the base portion 6. 7 are integrally connected by welding or connecting bolts, respectively.

  Thereby, the edge part on the opposite side to the site boundary line side of the gantry main bodies 2 and 2 is integrally connected by the connecting beams 3 and 3 in two upper and lower stages. Further, the floor portions 5 of the mounts 2 and the mountain retaining materials 7 constituting the base portion 6 are integrally connected. The connecting beams 3 and 4 are made of a shape steel such as a grooved steel or L-shaped steel.

  Reference numeral 8 denotes a reinforcing jack, which is detachably installed between the upper and lower flanges of each mountain stopper 7. The reinforcing jack 8 is installed at a point where an excessive load is applied particularly when the CD machine is installed on the floor 5. A stiffener may be installed in place of the reinforcing jack 8.

  In the present invention, even when a CD machine is installed outside the site boundary line, it can be installed without any special work such as forming a foundation for installation outside the site.

DESCRIPTION OF SYMBOLS 1 CD machine installation stand 2 Base frame 3 Connection beam 4 Connection beam 5 Floor part 5a Overhang part 6 Base part 7 Retaining material 8 Reinforcement jack 9 Casing 10 Hammer grab 11 CD machine (casing driver)
12 Base plate 13 CD machine body 14 Horizontal adjustment jack cylinder 15 Lifting frame 16 Thrust cylinder 17 Grip band 18 Band cylinder

Claims (4)

  A CD machine installation stand for installing a CD machine installed outside the site boundary line and used for press-fitting and withdrawing the casing is installed inside the site boundary line in parallel in the site boundary line, and the CD A set of gantry main bodies on which the machine is installed, and a plurality of connecting beams that span between the ends of the gantry main body on the site boundary side and between the opposite ends and connect the gantry main bodies to each other A space for installing the casing is provided between the gantry main bodies, and an overhanging portion for installing the site boundary side of the CD machine at the site boundary side of the gantry main body is A CD machine installation stand characterized by being provided outside the site boundary line.   2. The CD machine installation frame according to claim 1, wherein the frame main body is composed of a floor part for installing the CD machine and a base part that supports the floor part, and the floor part and the base part are formed of a plurality of mountain fastening materials. CD machine installation stand characterized by   3. The CD machine installation stand according to claim 1 or 2, wherein a jack cylinder is installed at a position where the CD machine on the floor and the base part is installed.   A CD machine comprising the CD machine installation stand according to any one of claims 1 to 3 and a CD machine main body installed on the CD machine installation stand.

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