JP6675427B2 - Home door basic structure, construction method and screwing jig - Google Patents

Description

  The present invention relates to a foundation structure of a home door for installing a door device such as a movable platform fence or a platform screen door on a platform formed by embankment, a construction method thereof, and a screwing jig.

  Patent Literature 1 discloses a fixing structure and a fixing method for installing a platform door device on an embankment-type platform formed by embankment. This document describes a structure in which a concrete slab is installed on the top surface of an embankment for mounting a platform door device, and the concrete slab is supported by rock bolts fixed to the embankment by grout injected around the embankment. .

  According to the method disclosed in Patent Literature 1, in order to inject a grout into a gap between the drilling hole and a rock bolt on an embankment, a construction machine or a construction facility such as an injection device is installed on a platform. Become.

  On the other hand, Patent Literature 2 discloses a spiral pile composed of a spiral portion formed by twisting flat steel in a spiral shape, and a steel pipe connected to an upper portion thereof. The spiral pile is embedded as a foundation in the ground to support columns such as small signs and curved mirrors.

JP 2014-62407 A JP 2017-40110 A

  However, construction on the platform must be carried out with restrictions such as train operation schedules and ensuring the safety of passengers.Therefore, the less construction machines and construction equipment installed on the platform, the more efficient the construction. it can. Furthermore, when installing large-scale construction machinery that exceeds the design load on an embankment platform where the track side is protected by retaining walls, construction work to reinforce the retaining walls must be implemented in advance. No.

  Therefore, an object of the present invention is to provide a basic structure of a home door having a simple configuration for installing a door device on a platform formed by embankment having a severe limitation of an overload, a construction method thereof, and a screwing jig. I have.

  In order to achieve the above object, a foundation structure of a home door according to the present invention is a foundation structure of a home door for installing a door device on a platform formed by embankment, wherein the foundation device is installed at a track side edge of the platform. A slab plate for connecting a supporting portion of the door device, and an upper steel pipe portion and a lower spiral portion at a position separated from a line side edge of the slab plate, and are poured into the embankment. And an upper end of the spiral pile is inserted into a through hole of the slab plate and is connected via a connecting portion.

  Here, a projection is provided on the outer peripheral surface of the upper end of the spiral pile, and the solidification material filled in the gap between the through hole and the upper end and the projection form the axis of the spiral pile. It is possible to adopt a configuration in which the rotation around is prevented.

  Further, a screw groove may be formed on an outer peripheral surface of an upper end portion of the spiral pile, and the connecting portion may be provided with a washer nut having a flange portion screwed into the screw groove. Further, the flange of the washer nut may be arranged on a lower surface side of the slab plate.

  Further, the invention of a method of constructing a foundation structure of a home door includes a step of driving the spiral pile into the embankment and a step of drilling the through hole in the slab plate in accordance with a position where the spiral pile is driven. Setting the slab plate by passing the through hole through the upper end of the spiral pile; and connecting the upper end of the spiral pile to the slab plate by the connecting portion. Features.

  On the other hand, the invention of a screwing jig is a screwing jig for screwing a spiral pile having an upper steel pipe portion and a lower spiral portion into the ground, wherein a tube having an inner diameter larger than the outer diameter of the steel pipe portion is formed. A body portion, a protruding rod portion projecting radially outward from an outer peripheral surface of the tubular body portion, and a support provided on an inner peripheral surface of the tubular body portion and provided on an outer peripheral surface of the steel pipe portion. A protrusion formed to be able to contact the force portion.

  The basic structure of the home door of the present invention configured as described above includes a slab plate for connecting the support portion of the door device and a spiral pile driven into the embankment. Then, the upper end of the spiral pile is inserted into a through hole of the slab plate and connected via a connecting portion.

  Spiral piles can be cast on the embankment without using special heavy equipment, so even if the platform is formed by embankment where the loading load is severely restricted, a simple configuration for installing door devices The basic structure of the home door can be provided.

  In addition, by providing a projection on the outer peripheral surface of the upper end of the spiral pile, the solidified material filled in the through hole of the slab plate and the projection prevent rotation around the axis of the spiral pile, It is possible to prevent the spiral pile from rotating after building and weakening the connection with the slab plate or the embankment.

  Furthermore, by screwing a washer nut into the screw groove at the upper end of the spiral pile, the slab plate can be received from below by the flange, or pressed from above by the flange, and has excellent integrity. It can be a connecting part. In particular, by disposing the flange portion of the washer nut on the lower surface side of the slab plate, the slab plate can be supported by the spiral pile 4 from below.

  And, in the invention of the method of constructing the foundation structure of the home door, in order to drill a through hole in the slab plate in accordance with the position where the spiral pile is driven, for example, the spiral pile is placed at the designed position due to an underground obstacle or the like. It is possible to drill a through hole at another position even if a slight displacement occurs when it is not possible to drive and it is not necessary to strictly control the placement accuracy of the spiral pile, and it is possible to perform construction quickly it can.

  In addition, in the invention of the screwing jig, the spiral portion can be screwed into the embankment with a small force such as human power by fitting the cylindrical portion to the steel pipe portion on the upper portion of the spiral pile, so that the large size can be mounted on the platform. It is possible to perform construction without installing construction machinery and construction equipment.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing explaining the structure of the platform in which the foundation structure of the home door of embodiment of this invention was built. It is a top view explaining the composition of the platform by which the foundation structure of the home door of an embodiment of the invention was built. It is a figure explaining the structure of a spiral pile, (a) is a side view, (b) is sectional drawing seen in the AA arrow direction of (a). It is a figure explaining composition of a screwing jig, (a) is a top view and (b) is a side view. It is a side view explaining the composition of a long screwing jig. It is sectional drawing explaining the structure of the connection part of the foundation structure of the home door of embodiment of this invention. It is a top view explaining the composition of the projection provided in the upper end part of a spiral pile. FIG. 2 is a cross-sectional view illustrating a configuration of a connecting portion of a basic structure of the home door according to the first embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are diagrams illustrating the configuration of the platform 1 exemplified in the present embodiment. The platform 1 is constructed along a track R on which a train travels.

  This platform 1 is an embankment type platform formed by embankment 11 such as earth and sand or clay, and the track R side is protected by an earth retaining wall 12. The embankment 11 is often a relatively soft ground having an N value of about 2 to 5.

  As an upper layer of the platform 1, for example, a floor finishing layer 13 such as a tile is provided on a base layer 131 such as mortar. Further, a pavement portion on which asphalt concrete or the like is spread can be used as an upper layer. Further, a non-slip tile and a Braille block are arranged on the upper layer line R side.

  Door devices installed on the track side edge 1a of the platform 1 include a movable platform fence and a platform screen door. In the present embodiment, a movable platform fence 2 will be described as an example of the door device.

  The movable platform fence 2 is mainly composed of an openable / closable door portion 23 facing the entrance / exit of the train, and a door pocket portion 22 that movably supports the door portion 23 and accommodates the door portion 23 when opened. As shown in FIG. 2, the door pocket portion 22 is supported by columns 21 and 21 arranged at intervals in the direction in which the line side edge 1 a of the platform 1 extends. In the movable platform fence 2 of the present embodiment, the columns 21 serve as support portions.

  The support 21 is erected on the support plate 24, and the support plate 24 is fixed to the upper layer of the platform 1 by the fixing anchor 25. In the present embodiment, as shown in FIG. 1, the distal end of the fixed anchor 25 is embedded and fixed in a slab plate 3 described later.

  The basic structure of the home door of the present embodiment is a support structure for installing the movable home fence 2 which is a door device on the platform 1 formed by the embankment 11 as described above. When the movable platform fence 2 is installed, in addition to its own weight, a wind load (including a wind load accompanying train passing) and a horizontal load due to crowds also act.

  The basic structure of the home door according to the present embodiment is cast into the embankment 11 in the region of the slab plate 3 for connecting the column 21 of the movable platform fence 2 and the slab plate 3 on the side of the home edge 3b. It is mainly constituted by a spiral pile 4 and a connecting portion 5 for coupling the slab plate 3 and the spiral pile 4.

  On the slab plate 3, the columns 21, 21 of the movable platform fence 2 installed on the rail side edge 1a of the platform 1 are placed. The slab plate 3 on which the supports 21 and 21 are placed is extended from the rail side edge 3a to the opposite home side edge 3b.

  As shown in FIG. 2, the slab plate 3 formed in, for example, a rectangular shape in a plan view has an interval in the extending direction of the line side edge 1 a of the platform 1 (extending direction of the line R) in accordance with the installation position of the column 21. Placed and set.

  The slab plate 3 is formed of a high-strength concrete material such as fiber reinforced concrete or resin concrete. For example, mainly containing cement, aggregate particles having a maximum particle size of 2 mm or less, pozzolanic reaction particles having a primary particle size of 1 μm or less, and metal fibers having a length of 2 mm or more and a length-to-diameter ratio of 20 or more. Can be formed by metal fiber reinforced concrete.

  The mechanical properties of such metal fiber reinforced concrete are very high, with a tensile strength of 12 MPa or more, a bending strength of 25 MPa or more, and a compressive strength of 150 MPa or more. Moreover, since it becomes a dense molded product, the slab plate 3 with high durability can be formed.

  On the other hand, resin concrete is concrete in which a liquid resin is used as a binder instead of cement to bind aggregate. Resin concrete is cured in a short time with a high bonding force due to a polymerization reaction between a resin and a catalyst, so that a dense molded article having high strength and excellent durability can be obtained. The mechanical properties of the resin concrete are such that the tensile strength is 10 MPa or more, the bending strength is 20 MPa or more, and the compressive strength is 100 MPa or more.

  When manufacturing the slab plate 3 by using such metal fiber reinforced concrete or resin concrete, it is not necessary to arrange a reinforcing bar as in the case of using ordinary concrete. Also, there is no need to arrange a PC steel wire to introduce prestress. For example, the slab plate 3 can be formed into a panel having a long side length of about 1.2 m to 1.5 m, a short side length (width) of about 1 m, and a thickness of about 70 mm. In such a slab plate 3, the through hole 31 can be drilled at an arbitrary position, for example, in accordance with the position of the spiral pile 4 that has been cast.

  The spiral pile 4 for fixing the slab plate 3 to the embankment 11 is provided with an upper steel pipe part 41 and a lower spiral part 42 as shown in FIG. 1 and FIG. For example, the length of the steel pipe part 41 can be about 1 m to 1.5 m, and the length of the spiral part 42 can be about 1 m to 2 m. Further, the pile diameter can be set to about 70 mm to 120 mm, preferably about 100 mm.

  The spiral pile 4 is arranged on the side of the home side edge 3b of the slab plate 3 that is separated from the side edge 3a of the track side. In order to make the embankment 11 interposed between the spiral pile 4 and the retaining wall 12 a resistance to the horizontal force acting on the spiral pile 4, the spiral pile 4 is located at a certain distance from the retaining wall 12. 4 must be cast.

  About one to four spiral piles 4,... Are arranged for one slab plate 3. For example, the spiral piles 4,... Are arranged in one to three rows from the line side edge 3a of the slab plate 3 to the home side edge 3b.

  As shown in FIG. 3A, the spiral portion 42 can be manufactured by, for example, spirally twisting flat steel. Since the spiral portion 42 has a 45-degree twisted surface, the same vertical support force can be exerted in both the pulling and pushing directions.

  The steel pipe part 41 is formed in a cylindrical shape, and can be a strong resistor against horizontal force. A notch is provided at the lower end of the steel pipe portion 41, and the upper end of the spiral portion 42 is inserted into the groove and fixed by welding or the like. The upper end portion 411 of the steel pipe portion 41 (the upper end portion 411 of the spiral pile 4) is formed in an upper end screw portion 43 having a thread groove formed on the outer peripheral surface.

  Further, an upper end hole portion 44 for providing a projection 53 described later is formed in the upper end screw portion 43. The upper end hole portion 44 is provided as a pair facing the steel pipe portion 41 so as to cross the bolt 531. Here, as shown in FIG. 7, the upper end holes 44, 44 that are paired with each other, are arranged in two upper and lower stages in order to arrange the bolts 531, 531 in a cross shape in plan view.

  Further, on the outer peripheral surface of the steel pipe portion 41, a force receiving portion 45 that comes into contact with a convex portion 63 of a screwing jig 6, 6A described later is provided. The force receiving portion 45 is formed of a thin steel rod, a reinforcing bar, or the like, and is fixed to the outer peripheral surface of the steel pipe portion 41 by welding or the like. For example, as shown in FIG. 3B, a plurality of force receiving portions 45 are attached at regular intervals of 90 degrees in the circumferential direction of the steel pipe portion 41.

  The force receiving portion 45 is provided to receive a rotational force from the screwing jigs 6 and 6A used when screwing the spiral pile 4 into the embankment 11. As shown in FIGS. 4A and 4B, the screwing jig 6 includes a cylindrical body 61 and a plurality of protruding rods 62 projecting radially outward from the outer peripheral surface of the cylindrical body 61. , And a plurality of convex portions 63, provided on the inner peripheral surface of the cylindrical body portion 61.

  As shown in FIG. 3B, the cylindrical body 61 has an inner diameter larger than the outer diameter of the steel pipe 41. A plurality of projections 63,... For contacting the plurality of force receiving parts 45,. The projection 63 is formed of a thin steel rod, a reinforcing bar, or the like, and is fixed to the inner peripheral surface of the cylindrical body 61 by welding or the like.

  An annular flange portion 64 is provided at a lower end of the cylindrical body portion 61, and an end of the protruding rod portion 62 is joined to an outer peripheral surface of the cylindrical body portion 61 and an upper surface of the flange portion 64 by welding or the like. A plurality of protruding rods 62 are attached, for example, in a cross shape in a plan view, and the length of the auxiliary rod 621 is adjusted by inserting an end of the auxiliary pipe 621 at the time of use.

  FIG. 5 shows a screwing jig 6A in which the cylindrical portion 61A is long. The screwing jig 6A is used when the upper end 411 of the spiral pile 4 is at a low position and rotated at a height at which an operator can easily work. .. Are provided near the lower end of the cylindrical body 61A, and the protruding rods 62,... Are attached to the upper end of the elongated cylindrical body 61A.

  As shown in FIG. 6, the upper end 411 of the spiral pile 4 is inserted into the through hole 31 of the slab plate 3 and is connected via the connecting portion 5. The through hole 31 is formed as a hole having an inner diameter slightly larger than the outer diameter of the steel pipe portion 41. For example, the through hole 31 having an inner diameter that is about 10 mm to 20 mm larger than the outer diameter of the steel pipe part 41 is provided.

  The connecting portion 5 includes a washer nut (51, 52) screwed into the upper end screw portion 43, a plurality of protrusions 53 projecting outward from the outer peripheral surface of the upper end screw portion 43, the through hole 31, and the upper end. It is mainly constituted by the solidified material 54 filled in the gap between the screw portion 43 and the outer peripheral surface.

  The washer nut (51, 52) has flange portions 511, 521, and the flange portion 511 of the lower washer nut 51 arranged on the lower surface side of the slab plate 3 is brought into contact with the lower surface of the slab plate 3. On the other hand, the flange 521 of the upper washer nut 52 arranged on the upper surface side of the slab plate 3 is brought into contact with the upper surface of the slab plate 3.

  The protrusion 53 only needs to be protruded to such an extent that the solidified material 54 such as a non-shrink mortar has a rotational resistance. Here, the protrusion 53 formed by the bolt 531 and the nut 532 will be described as an example.

  As the bolt 531, for example, a columnar cut bolt having no head can be used. As shown in FIG. 7, bolts 531 are inserted into opposed upper end holes 44, 44, and nuts 532, 532 are respectively mounted on both ends of bolts 531 that are uniformly protruded on both sides of steel pipe part 41. The parts 53 and 53 are formed. Note that a normal bolt having a head may be used, and one of the protrusions may be formed by a bolt head.

  By arranging the bolts 531 and 531 in a cross shape in a plan view in two stages, it is possible to provide the protrusions 53 at four locations at 90 ° intervals in the circumferential direction of the upper end portion 411. As a result, even if a force is generated in the spiral pile 4 to rotate around the axis, the rotation is prevented by the resistance of the hardened solidified material 54 around the projections 53.

Next, a method of constructing the basic structure of the home door according to the present embodiment will be described.
When installing on the existing platform 1, at least the floor finishing layer 13 and the base layer 131 in a range where the slab plate 3 is installed are removed in advance. Further, the upper surface of the embankment 11 is dug down by the thickness of the slab plate 3 as necessary.

  Subsequently, a step of placing the spiral pile 4 on the embankment 11 is performed. When driving the spiral pile 4, first, the embankment 11 is dug by the length of the steel pipe portion 41. Then, the spiral pile 4 is erected in the hole dug.

  The screwing jig 6 is attached to the steel pipe portion 41 protruding from the upper surface of the embankment 11. A long auxiliary pipe 621,... Is added to the protruding rods 62,... Of the screwing jig 6 so that a rotational force can be given with a small force.

  When a worker is arranged for each of the four auxiliary pipes 621 and rotated in one direction (for example, clockwise), as shown in FIG. ,... Are caught by the force receiving portions 45,. The spiral pile 4 to which the rotational force is applied is propelled downward by the spiral portion 42 being screwed into the embankment 11.

  When the upper end 411 approaches the ground, the screwing of the spiral pile 4 is switched to the long screwing jig 6A (see FIG. 5) and continued. After screwing the spiral pile 4 to a desired depth, the spiral pile 4 is moved to an adjacent construction site and the next spiral pile 4 is driven. In addition, the gap between the spiral pile 4 and the drilling of the embankment 11 is filled with mountain sand or the like.

  In the present embodiment, as shown in FIG. 2, a total of six spiral piles 4, in three rows in the width direction and two rows in front and rear, are laid on one slab plate 3. The spiral pile 4 can be driven into the embankment 11 by a worker's manpower, but the positions of the protruding upper ends 411,.

  Therefore, the relative positional relationship between the six upper end portions 411,... Is measured, and through holes 31,. Since the slab plate 3 is formed of metal fiber reinforced concrete and has no reinforcing bars, it is not necessary to avoid the reinforcing bars when drilling, and the through holes 31,.・ Can be perforated.

Before the slab plate 3 is installed, the lower washer nut 51 is screwed into the upper end screw portion 43 of the steel pipe portion 41 as shown in FIG. The mounting position of the lower washer nut 51 is adjusted according to the height at which the slab plate 3 is to be installed.
Then, bolts 531 are inserted into the upper end holes 44,... As shown in FIG. 7, and nuts 532, 532 are attached to ends protruding on both sides of the steel pipe 41, respectively.

  Next, the slab plate 3 is conveyed, and the slab plate 3 is installed by passing through the through holes 31,... Through the upper end portions 411,. Since the through-holes 31,... Of the slab plate 3 are perforated in accordance with the positions of the upper ends 411,.

  The gap between the through hole 31 and the upper end 411 of the slab plate 3 is filled with a solidifying material 54 such as non-shrink mortar as shown in FIG. Then, the upper washer nut 52 is screwed into the upper end screw portion 43 protruding from the upper surface of the slab plate 3 and tightened. The inner space of the steel pipe portion 41 is filled with non-shrink mortar as needed.

  After connecting the slab plate 3 and the upper end 411 of the spiral pile 4 by the connecting portion 5 in this manner, the fixed anchors 25,.・ Enter Then, a base layer 131 and a floor finishing layer 13 are provided in a predetermined range on the slab plate 3. Subsequently, the support plate 24 of the column 21 is fixed to the fixed anchor 25, and the movable platform fence 2 is installed.

Next, the basic structure of the home door of the present embodiment, a method of constructing the same, and the operation of the screwing jig will be described.
The basic structure of the home door of the present embodiment configured as described above includes the slab plate 3 for connecting the column 21 of the movable platform fence 2 and the spiral pile 4 cast into the embankment 11. . Then, the upper end portion 411 of the spiral pile 4 is inserted into the through hole 31 of the slab plate 3 and connected via the connecting portion 5.

  The spiral pile 4 can be driven by a worker without using a special heavy machine. Therefore, even if the platform 1 is formed by the embankment 11 whose load on the load is severely restricted, the movable platform fence can be used. 2 can be provided with a basic structure of a home door having a simple configuration.

  Also, projections 53,... Are provided on the outer peripheral surface of the upper end 411 of the spiral pile 4, and the solidified material 54 filled in the through-holes 31 of the slab plate 3 and the projections 53 rotate around the axis of the spiral pile 4. Take anti-rotation measures to prevent rotation. A horizontal load such as a wind load accompanying train passing repeatedly acts on the movable platform fence 2, and a force such that the spiral pile 4 rotates through the slab plate 3 may be transmitted. , It is possible to prevent the rotation of the spiral pile 4 that weakens the connection with the slab plate 3 and the adhesion to the embankment 11.

  Further, by screwing the lower washer nut 51 and the upper washer nut 52 into the upper end screw portion 43 of the upper end portion 411, the slab plate 3 can be pressed from above by the flange portion 521 while being received by the flange portion 511 from below. Thus, the connecting portion 5 having excellent integration can be obtained. In particular, by disposing the flange portion 511 of the lower washer nut 51 on the lower surface side of the slab plate 3, the slab plate 3 can be reliably supported from below. That is, the vertical load applied to the slab plate 3 can be reliably transmitted to the spiral pile 4 via the lower washer nut 51.

  In the method of constructing the foundation structure of the home door, the spiral piles 4 are drilled in the slab plate 3 in accordance with the positions where the plurality of spiral piles 4,. It is not necessary to strictly control the placing accuracy of the..., And the work can be quickly performed by human power.

  In particular, since no reinforcing bars or PC steel wires are arranged on the slab plate 3 formed of high-strength fiber-reinforced concrete, it is possible to perforate any part of the slab plate 3 without being restricted by the perforation position. Can be easily adjusted to the position where the spiral piles 4,. For example, even when the spiral pile 4 cannot be driven at the designed position due to an underground obstacle or the like in the embankment 11 and a slight displacement occurs, the through hole is drilled in accordance with the actually driven position. be able to.

  Also, by fitting the cylindrical portions 61, 61A of the screwing jigs 6, 6A into the steel pipe portion 41 above the spiral pile 4, and hooking the convex portions 63,. The spiral portion 42 can be easily screwed into the embankment 11 with a small force such as human power. For this reason, the construction can be performed quickly without installing large-scale construction machines and construction facilities on the platform 1.

  Hereinafter, a connecting portion 5A of a different form from the connecting portion 5 between the slab plate 3 and the spiral pile 4 described in the above embodiment will be described with reference to FIG. Note that the same or equivalent parts as those described in the above embodiment will be described with the same terms or reference numerals.

  The connecting portion 5A described in the first embodiment is applied to a case where a vertical load acting on the slab plate 3 is large, a case where the embankment 11 is soft and a large vertical supporting force cannot be expected from the spiral pile 4, and the like. In short, not all the vertical load acting on the slab plate 3 is transmitted to the spiral pile 4, but is also distributed on the upper surface of the embankment 11.

  In the connection portion 5A of the first embodiment, the lower washer nut 51 is not attached to the upper end screw portion 43. On the other hand, the height adjusting layer 55 is provided with mortar or the like so that the load is transmitted evenly from the lower surface of the slab plate 3. By bringing the entire lower surface of the slab plate 3 into close contact with the smooth upper surface of the height adjustment layer 55, the vertical load can be evenly transmitted to the embankment 11 without generating a local load.

  After the slab plate 3 is installed on the height adjustment layer 55, the gap between the through hole 31 and the upper end 411 of the slab plate 3 is filled with a solidifying material 54 such as non-shrink mortar. Then, the upper washer nut 52 is screwed into the upper end screw portion 43 protruding from the upper surface of the slab plate 3 and tightened.

The connecting portion 5 </ b> A configured as described above presses the slab plate 3 against the embankment 11 from above with the flange portion 521 of the upper washer nut 52. As a result, the load applied to the slab plate 3 can be dispersed and transmitted not only to the spiral pile 4 but also to the surrounding embankment 11, and can be applied to the soft embankment 11 and the platform 1 in which the overhead load becomes large. Will be able to do it.
Note that the other configuration, operation, and effect are substantially the same as those of the above-described embodiment, and thus description thereof is omitted.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiment and the example, and a design change that does not depart from the gist of the present invention. Are included in the present invention.

  For example, in the above-described embodiment, the case where the movable platform fence 2 is installed as the door device has been described. However, the present invention is not limited to this, and the present invention is also applied to the case where the platform screen door is installed as the door device. it can. Further, the support portion of the door device is not limited to the column 21, and depending on the form of the door device, a leg portion, a pedestal portion, or the like may be the support portion.

  Further, in the above-described embodiment, the method of driving the spiral pile 4 into the embankment 11 by using only the human power by using the screwing jigs 6 and 6A has been described. However, the present invention is not limited to this, and a small hitting device is used. Can also be driven by attaching a blow to the upper end of the spiral pile 4 to give a blow.

  Further, in the above-described embodiment, an example in which six spiral piles 4,... Are connected to one slab plate 3 has been described. However, the present invention is not limited to this. , The arrangement pattern, and the plane position of the arrangement in the slab plate can be arbitrarily set by design.

  Further, in the above embodiment, the slab plate 3 formed of unreinforced fiber reinforced concrete has been described as an example. However, the present invention is not limited to this, and may be a slab plate made of reinforced concrete or PC concrete. Good. In this case, the placement position of the spiral pile 4 is strictly controlled, or a large through-hole is provided at a position avoiding a reinforcing bar or the like.

  Further, in the above embodiment, the plurality of projecting rods 62 of the screwing jigs 6 and 6A are described as being attached in a cross shape in a plan view. However, the present invention is not limited to this. Three protrusions may be attached every time, and the number of protruding rod portions 62 can be arbitrarily set.

1: Platform 11: Embankment 1a: Track side edge 2: Movable platform fence (door device)
21: Support (support)
3: Slab plate 3a: Track side edge 31: Through hole 4: Spiral pile 41: Steel pipe 411: Upper end 42: Spiral 43: Upper end screw (screw groove)
45: Force receiving part 5, 5A: Connecting part 51: Lower washer nut (washer nut)
511: collar 52: upper washer nut (washer nut)
521: flange 53: projection 54: solidifying material 6, 6A: screwing jig 61, 61A: cylindrical body 62: projecting rod 63: convex R: line

Claims (6)

A base structure of a home door for installing a door device on a platform formed by embankment,
A slab plate for connecting a support portion of the door device installed at a track side edge of the platform,
At a position separated from the rail side edge of the slab plate, a spiral pile having an upper steel pipe portion and a lower spiral portion and being driven into the embankment,
A base structure of a home door, wherein an upper end of the spiral pile is inserted into a through hole of the slab plate and connected via a connecting portion.   A projection is provided on the outer peripheral surface of the upper end of the spiral pile, and the solidification material filled in the gap between the through hole and the upper end and the projection make the spiral pile rotate around the axis. 2. The base structure of a home door according to claim 1, wherein:   A screw groove is formed on an outer peripheral surface of an upper end portion of the spiral pile, and the connection portion includes a washer nut having a flange portion screwed into the screw groove. The basic structure of the described home door.   The base structure of the home door according to claim 3, wherein the flange of the washer nut is arranged on a lower surface side of the slab plate. It is a construction method of the foundation structure of the home door as described in any one of Claims 1 thru | or 4, Comprising:
Driving the spiral pile into the embankment,
Drilling the through hole in the slab plate in accordance with the position where the spiral pile has been cast;
Installing the slab plate by passing the through hole through the upper end of the spiral pile;
Connecting the slab plate and the upper end of the spiral pile by the connecting portion. A screwing jig for screwing a spiral pile having an upper steel pipe part and a lower spiral part into the ground,
A tubular body part having an inner diameter larger than the outer diameter of the steel pipe part,
A protruding rod portion that protrudes radially outward from the outer peripheral surface of the cylindrical body portion,
A rod-shaped convex portion fixed to the inner peripheral surface of the cylindrical body portion so as to be able to contact a rod-shaped force receiving portion fixed to the outer peripheral surface of the steel pipe portion. Screwing jig.