JP5071836B2 - Formwork separator - Google Patents

Description

  The present invention relates to a separator for a mold used for holding a mold at an arbitrary interval and for preventing water leakage of a constructed concrete underground wall.

  Conventionally, for example, when constructing a concrete underground wall, a separator is attached to the H-shaped steel built in the retaining wall by welding, and a sheet-like waterproof material is laid along the wall of the retaining wall while piercing the separator The separator is supported by a mold frame spaced from the wall surface of the retaining wall at a predetermined interval, and concrete is placed between the retaining wall and the mold frame. However, when placing concrete in the mold, the sheet-like waterproof material is pulled downward, and a gap is often generated between the separator and the sheet-like waterproof material, thereby causing water leakage in many cases.

  On the other hand, there exists what comprised the separator apparatus with the attachment bracket fixed to a retaining wall, and the separator attached to a retaining wall via an attachment bracket (for example, refer patent document 1). In this separator device, the mounting bracket includes a shaft portion having a screw portion on the outer peripheral surface, a proximal flange portion formed on the proximal end side of the shaft portion, and a connection portion formed on the distal end side of the shaft portion. The separator is formed in a rod shape and has a threaded portion on the outer peripheral surface. In this separator device, at the stage where the base end flange portion is fixed to H-shaped steel or the like built in the retaining wall, the mounting bracket is attached, and the sheet-shaped waterproofing material is installed while piercing the shaft portion of the mounting bracket. A fastening nut is screwed onto the shaft, and the waterproof sheet is sandwiched and fixed between the fastening nut and the proximal flange portion. Then, a rod-like separator is attached to the connecting portion of the shaft portion, and the mold is supported on the tip side. When the separator device is installed in this way, even if concrete is placed in the mold and the sheet-like waterproof material is pulled downward, the sheet-like waterproof material is sandwiched between the fastening nut and the proximal flange portion. Since it is fixed, it is possible to prevent a gap from occurring in this portion.

On the other hand, there is a case where a tear is generated in the sheet-like waterproof material due to the placement of concrete, or a joint portion between the sheet-like waterproof materials is peeled off over time, and water leaks from joints or cracks of the underground wall. On the other hand, especially when there is a large amount of water leakage or when it is necessary to stop water reliably, a plurality of through holes are drilled in the basement wall with a drill or the like, and the space between the basement wall and the mountain retaining wall (gap For example, a waterproofing method for back surface is applied in which a water-stopping material such as acrylic emulsion is injected to fill the gaps that form the groundwater.
Utility Model Registration No. 3053221

  However, the above waterproofing method on the back side will damage the underground wall due to the opening of a plurality of through holes in the underground wall, and in addition to the separator marks on the underground wall, there will remain traces of filling the through holes after construction. In many cases, it was not possible to understand that a through-hole was provided in a basement wall during construction or shortly after construction because the appearance of the wall was reduced. Further, the back surface waterproofing method has a drawback that the cost for forming the through hole for injecting the water-stopping material accounts for about 70% of the total cost, resulting in a high cost.

  An object of this invention is to provide the separator for a formwork which can be utilized for injection | pouring of a water stop material in view of the said situation.

  In order to achieve the above object, the present invention provides the following means.

The separator for formwork of the present invention is a separator for formwork that is used for construction of a concrete underground wall and holds the formwork at an arbitrary interval from the ground side, and the tip is disposed on the ground side. a substantially cylindrical tubular portion made of steel, and the separator portion of the rod-shaped one end connecting portion of the rear end of the tubular portion is detachably connected, it is detachably connected to the other end of the separator section and a positioning portion for holding the mold Te, the leading end side of the tubular portion has a discharge hole is provided for discharging the water stopping material to be injected between the ground side to the basement walls The discharge hole is a through-hole penetrating from the outer surface to the inner surface of the cylindrical portion, or a slit cut out from the front end to the rear end of the cylindrical portion, and the axial center of the cylindrical portion. Four or more are provided at equal intervals in the circumferential direction, and the tip of the cylindrical portion A ring-shaped water stop member that is supported by being mounted between the tip of the positioning portion is provided, and the water stop material can be discharged from the discharge hole on the tip side of the cylindrical portion. While the elastic member for preventing the inflow of impurities into the cylindrical portion is attached, a female screw portion is provided in the connecting portion of the cylindrical portion, the one end side and the separator A male screw part is provided on the other end side, and a female screw part is provided in the positioning part. The cylindrical part and the separator part, and the separator part and the positioning part are respectively provided with the male screw part. And a female screw part are detachably connected by being screwed together, a female screw part is provided on the tip side of the cylindrical part, and the male screw part on the rear end side of the screw bit attached to the ground side The female thread part is screwed to support the cylindrical part. Characterized in that that.

Moreover, in the separator for formwork of this invention, the cylindrical protective member which is provided between the rear end of the said cylindrical part and the front-end | tip of the said positioning part, and the said separator part is penetrated and protects this separator part is provided. The protective member is provided so as to be sandwiched between the cylindrical portion and the positioning portion, and a gap is provided between the outer peripheral surface of the separator portion and the inner surface of the protective member. In addition, it is desirable that the protective member and the separator portion are arranged so that the axes thereof are substantially coaxial .

  According to the separator for formwork of the present invention, it includes a tubular part, a separator part that is detachably connected to the tubular part, and a positioning part that is detachably connected to the separator part and holds the formwork, By providing a discharge hole for discharging the water-stopping material on the distal end side of the tubular portion, the distal end of the tubular portion is placed on the ground side, and a separator portion is attached to the rear end, and the separator portion By attaching the positioning part to the mold, the mold can be installed at a predetermined position. As a result, concrete can be placed between the ground side and the formwork to construct the desired underground wall, the positioning part is removed from the concrete frame (underground wall), and the tubular part and separator part are placed in the concrete. Can be buried.

  And when water leakage occurs after construction of the underground wall, by removing the separator part detachably connected to the cylindrical part, by supplying a water stop material to the concrete hole communicating with the inner hole of the cylindrical part, The water-stopping material can be poured into the gap between the ground side and the underground wall from the distal end side of the tubular portion. As a result, since the mold separator that is originally used to hold the mold can be used for injecting the water-stopping material, there is no need to form a separate through-hole as in the conventional back surface waterproofing method. Can be prevented from being damaged, and the cost for water stoppage can be greatly reduced. Moreover, since the trace of a through-hole is not separately formed in a basement wall in addition to a separator trace, it can also eliminate the fall of the aesthetics of a basement wall.

  Furthermore, in the separator for formwork of the present invention, the water stop member provided between the tip of the cylindrical portion and the tip of the positioning portion is provided, so that the concrete, the cylindrical portion and the separator portion or Even when groundwater enters between the protective member and the water blocking member, it is possible to block water from the groundwater, and water leaks between this concrete and the tubular part and separator part or protective member. Can be prevented.

  Further, in the separator for formwork of the present invention, the discharge hole is provided as a through-hole penetrating from the outer surface to the inner surface of the cylindrical portion, or as a slit notched from the front end to the rear end of the cylindrical portion. Therefore, the water-stopping material supplied to the inner hole of the cylindrical part can be reliably discharged to the outside through this through-hole or slit, and the water-stopping material is surely injected into the gap between the ground side and the underground wall Can do.

  Furthermore, in the separator for formwork of the present invention, four or more discharge holes are provided at equal intervals in the circumferential direction of the center of the axis of the cylindrical portion, so that the water can be uniformly stopped in the gap between the ground side and the underground wall. Since the material can be discharged, the gap can be reliably filled with the water-stopping material. Thereby, it becomes possible to stop water leakage reliably.

  Further, in the separator for formwork of the present invention, an elastic member for preventing the inflow of impurities into the cylindrical portion while allowing the water-stopping material to be discharged from the discharge hole is attached to the distal end side of the cylindrical portion. For example, it is possible to prevent, for example, concrete scrap generated before the placed concrete hardens, groundwater, etc. from flowing into the cylindrical portion, and the inner hole of the cylindrical portion is made of the cement component of the concrete. It is possible to prevent blocking or inducing water leakage through the inner hole of the cylindrical portion.

  Furthermore, in the separator for formwork of this invention, a cylindrical part and a separator part, and a separator part and a positioning part are connected with each screw, and attachment / detachment of each member can be performed reliably and easily.

  Further, in the separator for formwork of the present invention, a female screw portion is provided on the tip side of the cylindrical portion, and the female screw portion is screwed to a male screw portion on the rear end side of the screw bit attached to the ground side. By configuring so that the cylindrical portion is supported, the cylindrical portion can be easily installed and the discharge hole can be arranged at a predetermined position. Thereby, it becomes possible to inject | pour the water stop material discharged from the discharge hole into the clearance gap between a ground side and an underground wall reliably.

Furthermore, in the separator for formwork of the present invention, a cylindrical protective member is provided between the rear end of the cylindrical part and the front end of the positioning part, and the separator part is inserted to protect the separator part. By being, it can hold | maintain a separator part in a non-contact state with concrete. Thereby, when injecting the water-stopping material, the separator portion can be easily removed from the tubular portion, and the water-stopping material is supplied from the inner hole of the protective member to the inner hole of the tubular portion communicating with the inner hole. Thus, the water-stopping material can be poured into the gap between the ground side and the underground wall from the distal end side of the tubular portion .

  Hereinafter, a mold separator according to an embodiment of the present invention will be described with reference to FIGS. The present embodiment relates to a separator for formwork that is used when constructing a concrete underground wall, holds the formwork at an arbitrary interval, and can be used to prevent water leakage from the constructed underground wall. .

  As shown in FIG. 1, the separator A for formwork of this embodiment is a steel cylindrical member (cylindrical part) 1 and a columnar bar shape whose one end is detachably connected to the cylindrical member 1. Separator core material (separator portion) 2, a truncated cone cylindrical positioning member 3 a detachably connected to the other end of the separator core material 2, and a cylindrical shape that protects the separator core material 2 while being inserted The protective member 4, the ring-shaped water-stopping member 5 provided around the protective member 4, and the annular plate-like elastic member 6 attached to the tip 1 a side of the cylindrical member 1. In this embodiment, the positioning member 3a constitutes a positioning portion 3 for holding the mold 7 together with a screw rod 3b described later.

  The cylindrical member 1 includes a cylindrical main body portion 1b and a connection portion 1d that is integrally fixed to the rear end (the rear end 1c side of the cylindrical member 1) of the main body portion 1b. The main body 1b penetrates from the outer peripheral surface (outer surface) to the inner peripheral surface (inner surface) on the front end 1a side (the front end 1a side of the cylindrical member 1), and the axis (mold) from the front end 1a to the rear end 1c. A plurality of slits (ejection holes) 1e cut out in the O1 direction are formed. The plurality of slits 1e are provided in the present embodiment, and are arranged at equal intervals in the circumferential direction around the center of the axis O1. Further, on the front end 1a side of the main body portion 1b, a female screw is formed on the inner surface thereof to form a female screw portion 1f. The female screw portion 1f is rearward from the front end 1a in the direction of the axis O1 of the slit 1e. It is formed in a range located on the tip 1a side than the end portion on the end 1c side. The connecting portion 1d is a nut having an internal diameter of a female screw of 2/5, and is fixed to the rear end 1c side of the main body portion 1b by welding or the like so that the axis O1 is coaxially arranged. ing.

  The separator core material 2 has a diameter of 2/5 and has male screw portions 2a on the outer peripheral surfaces on the front end (one end) side and the rear end (other end) side. And this separator core material 2 arrange | positions each axis O1 on the same axis | shaft by screwing the external thread part 2a of the front end side with the internal thread part 1g of the connection part 1d of the cylindrical member 1, and is integrated. It is connected.

  The circular truncated cone-shaped positioning member 3a is, for example, a plastic cone (P-con) or a mortar cone (M-con), and a female screw portion 3c is formed by threading a female screw on the inner surface of the inner hole. . The positioning member 3a is integrated with the separator core member 2 by the male screw portion 2a on the rear end side of the separator core member 2 being screwed into a part of the female screw portion 3c from the distal end side on the small diameter side. It is connected. Further, on the rear end side of the positioning member 3a on the large-diameter side, a substantially cylindrical rod-shaped screw rod 3b whose outer peripheral surface is threaded with a male screw is screwed into a part of the female screw portion 3c, thereby positioning. Projecting from the rear end of the member 3a toward the outside in the direction of the axis O1, is detachably connected.

  In this embodiment, the protective member 4 is a circular tube made of vinyl chloride or steel, and is cylindrical with the separator core 2 attached to the cylindrical member 1 and the positioning member 3a attached to the separator core 2. One end and the other end in the direction of the axis O1 are brought into contact with the rear end (rear end surface of the connecting portion 1d) 1c and the front end (front end surface) of the positioning member 3a, that is, sandwiched between the cylindrical member 1 and the positioning member 3a. Has been provided. At this time, the separator core material 2 is inserted into the inner hole H1 of the protection member 4, and the outer peripheral surface of the separator core material 2 and the inner surface of the protection member 4 are in a non-contact state, that is, in a state where a gap is provided. .

  The water stop members 5 are made of, for example, rubber and formed in a ring shape, and are provided integrally with each other in a state in which the protective member 4 is inserted into the inner hole. The annular and substantially rectangular plate-like elastic member 6 is, for example, a sponge, the tip 1a side of the main body 1b of the cylindrical member 1 is inserted into the inner hole, and the inner surface of the inner hole and the outer surface of the main body 1b are fixed. ing. At this time, the elastic member 6 is provided so that the front end surface thereof is substantially in the same position as the front end 1a of the cylindrical member 1 in the direction of the axis O1, and covers the front end 1a side of the slit 1e of the cylindrical member 1. Yes. That is, most of the slit 1e of the cylindrical member 1 is exposed.

  Next, a method for constructing the underground wall C by installing the mold 7 using the mold separator A having the above configuration will be described.

  When installing the formwork 7, first, as shown in FIG. 2, for example, an H-shaped steel (parent pile) that is built into a retaining wall G1 that supports the ground G and one surface is exposed on the wall surface G2 of the retaining wall G1. ) Install the screw bit 10 at G3. At this time, the screw bit 10 is installed so that a predetermined length protrudes from one surface of the H-shaped steel G3. The screw bit 10 is provided with a male screw on the outer peripheral surface of the protruding portion.

  Next, the cylindrical member 1 having the elastic member 6 attached and fixed to the tip 1a side is fixed by screwing the female screw portion 1f on the tip 1a side with the male screw of the screw bit 10. At this time, the cylindrical member 1 is attached to and supported by the screw bit 10 so that the distal end 1a and the distal end surface of the elastic member 6 are in contact with one surface of the H-shaped steel G3.

  Next, as shown in FIG. 3, the male screw portion 2 a on the front end side of the separator core member 2 is screwed into the female screw portion 1 g of the connecting portion 1 d provided on the rear end 1 c side of the cylindrical member 1. To do. Then, as shown in FIGS. 4 and 5, from the rear end side of the separator core material 2, the separator core material 2 is inserted into the inner hole H <b> 1 of the protection member 4 around which the water blocking member 5 is mounted, The positioning member 3a is screwed into the male screw portion 2a on the rear end side of the separator core member 2 while the front end is brought into contact with the rear end surface of the connection portion 1d. The positioning member 3a is completely screwed and installed, and the protective member 4 is sandwiched and fixed by the connecting portion 1d and the positioning member 3a. At this time, the axis O1 of the protection member 4 is arranged substantially coaxially with the axis O1 of the separator core 2 so that the inner surface of the protection member 4 and the outer surface of the separator core 2 are not in contact with each other. Here, when the protective member 4 is made of vinyl chloride, it can be easily cut to adjust its length. Thereby, the interval between the rear end 1c of the cylindrical member 1 formed with a certain length and the front end of the positioning member 3a, that is, the length of the separator core material 2 to be protected, and the wall surface G2 of the retaining wall G1 and the mold The length is adjusted at the site according to the distance to the inner surface of the frame 7 (wall thickness of the underground wall C).

  Next, as shown in FIG. 6, the screw rod 3b is attached by being screwed into the female screw portion 3c on the rear end side of the positioning member 3a. At this stage, the screw rod 3b is inserted into the mold hole 7a of the mold 7 through which the screw rod 3b can be inserted, and the screw rod 3b is brought into contact with the rear end surface of the positioning member 3a. A nut (not shown) is screwed, and the mold 7 is sandwiched and fixed by this nut and the positioning member 3a. Thereby, the clearance gap between the wall surface G2 of the mountain retaining wall G1 and the inner surface of the formwork 7 is formed equal to the wall thickness of the underground wall C, and the installation of the formwork 7 is completed. Here, the mold separator A of the present invention used to install the mold 7 as described above is installed at a pitch of, for example, about 700 mm to form the mold 7 in the same manner as the conventional mold separator. Hold.

  At the stage where the mold 7 is installed in this way, concrete is placed in the formed gap. At this time, in the uncured concrete, there are many cases in which the concrete paste or the like flows along the wall surface G2 of the retaining wall G1 or the inner surface of the formwork 7. In this embodiment, impurities such as concrete paste are The elastic member 6 attached to the tip 1a of the cylindrical member 1 is prevented from entering the inner hole H2 of the cylindrical member 1. As a result, the concrete slot does not block the inner hole H2.

  Then, the mold 7 is removed at the stage where the concrete exhibits a predetermined strength. In the present embodiment, at the stage of removing the formwork 7 in this way, the screw rod 3b and the positioning member 3a are removed, and the separator core member 2 is further removed from the cylindrical member 1, and the inner hole H1 and the cylinder of the protection member 4 are removed. It is confirmed whether or not water leaks into the inner hole H2 of the member 1. At this stage, if water leakage is not confirmed, the separator core material 2 is reattached, and a water-expandable water stoppage (not shown) is attached to the concave hole H3 defined by the positioning member 3a. Complete construction. In addition, in the underground wall C constructed in this way, when groundwater enters between the cylindrical member 1 or the protective member 4 embedded in the underground wall C and left behind and tries to circulate this water channel In this case, water leakage does not occur because the waterway is blocked by the water stop member 5.

  On the other hand, when water leakage is confirmed and it is determined that it is necessary to fill the gap between the ground G side and the underground wall C with a water-stopping material, as shown in FIG. A plug T of a high-pressure injector is set in the inner hole H1 through the concave hole H3, and a water-stopping material such as an acrylic emulsion resin or an epoxy resin is supplied while being pressurized. The water blocking material is supplied from the inner hole H1 of the protection member 4 into the inner hole H2 of the cylindrical member 1 communicating with the inner hole H1. And a water stop material is discharged outside from the discharge hole 1e, and is filled in the clearance gap between the ground G side and the underground wall C. In the present embodiment, the water-stopping material is injected using the mold separator A as described above, and at this time, for example, 600 mm of a through hole formed in the underground wall C when the conventional back surface waterproofing method is applied. Since the mold separator A is installed at a pitch of approximately 700 mm, for example, approximately equal to a pitch of approximately 800 mm, a water-stopping material is injected in the same manner as in the conventional back surface waterproofing method.

  Therefore, in the formwork separator A of the present embodiment, the tip 1a of the cylindrical member 1 is disposed on the ground G side, the separator core 2 is attached to the rear end 1c, and the positioning member is attached to the separator core 2. By attaching 3, the mold 7 can be installed at a predetermined position. As a result, concrete can be placed between the ground G side and the formwork 7 to construct a desired underground wall C. The positioning member 3 is removed from the underground wall C, and the cylindrical member 1 and the separator core 2 are removed. Can be embedded in concrete.

  And a water stop material can be inject | poured into the clearance gap between the ground G side and the underground wall C from the front-end | tip 1a side of the cylindrical member 1 by supplying a water stop material to the inner hole H1 of the protection member 4. FIG. Thereby, since the mold separator A that is originally used for holding the mold 7 can be used for injection of the water-stopping material, it is not necessary to form a separate through-hole as in the conventional back surface waterproofing method. It is possible to prevent the underground wall C from being damaged, and to significantly reduce the cost for water stoppage. In addition to the separator marks, there is no separate through-hole mark formed on the underground wall C, so that the appearance of the underground wall C can be reduced.

  In addition, since the cylindrical protection member 4 that protects the separator core material 2 is provided, the separator core material 2 can be held in a non-contact state with the concrete. Thereby, when injecting the water-stopping material, the separator core material 2 can be easily removed from the cylindrical member 1, and the water-stopping material is supplied from the inner hole H1 of the protective member 4 to the inner hole H2 of the cylindrical member 1. And a water stop material can be inject | poured into the clearance gap between the ground G side and the underground wall C. FIG.

  Furthermore, by providing the water stop member 5, it is possible to prevent water leakage between the concrete and the cylindrical member 1 and the protection member 4.

  Further, since the discharge hole 1e is provided as a slit cut out from the front end 1a of the cylindrical member 1 toward the rear end 1c, the water-stopping material supplied to the inner hole H2 of the cylindrical member 1 can be It can be reliably discharged to the outside through the slit 1e, and the water stop material can be reliably injected into the gap between the ground G side and the underground wall C.

  Furthermore, by providing six (six) discharge holes 1e at equal intervals in the circumferential direction of the center of the axis O1 of the cylindrical member 1, water-stopping material can be evenly distributed in the gap between the ground G side and the underground wall C. The gap can be surely filled with a water-stopping material. Thereby, it becomes possible to stop water reliably.

  Further, since the sponge (elastic member) 6 is attached to the tip 1a side of the cylindrical member 1, for example, the concrete member generated in the stage before the placed concrete is hardened, the ground water, or the like is cylindrical member 1. Can be prevented from flowing into the inner hole H2, and the inner hole H2 of the cylindrical member 1 can be blocked by the cement component of the concrete, or water leakage can be prevented from being induced through the inner hole H2 of the cylindrical member 1.

  Furthermore, the cylindrical member 1 and the separator core material 2, and the separator core material 2 and the positioning member 3a are connected by screws, so that each member can be attached and detached reliably and easily.

  The cylindrical member 1 is provided with a female screw portion 1f on the front end 1a side, and the female screw portion 1f is screwed into a male screw portion on the rear end side of the screw bit 10 attached to the ground G side. Is supported, the cylindrical member 1 can be easily installed, and the discharge hole 1e can be disposed at a predetermined position. Thereby, it becomes possible to inject | pour the water stop material discharged from the discharge hole 1e into the clearance gap between the ground G side and the underground wall C reliably.

  Further, when the protective member 4 is made of vinyl chloride, the protective member 4 can be prevented from being corroded by moisture in the concrete, and the separator core 2 can be reliably protected. In addition, since the length can be easily adjusted by cutting at the site, even when the cylindrical member 1 is formed with a certain length, the length of the protective member 4 can be adjusted to adjust the length of the ground G side and the mold. It becomes possible to reliably protect the separator core 2 formed with a length corresponding to the gap with the frame 7, that is, the wall thickness of the underground wall C. Moreover, when the protection member 4 is made of steel, the separator core 2 can be more reliably held in a non-contact state with concrete.

  Furthermore, when the separator core material 2 has a diameter of 2/5/5 mm, the conventional separator can be used as it is, and as a result, the positioning member 3a such as P-con, which is conventionally used, can be used as it is. Thereby, even when it is configured so that the mold separator A can be used for injecting the water-stopping material, the large positioning member 3a is not required, and the labor for repairing the separation hole is not increased.

  As mentioned above, although embodiment of the separator A for formwork which concerns on this invention was described, this invention is not limited to said one Embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in the present embodiment, the cylindrical member 1 of the formwork separator A is connected to and supported by the screw bit 10 attached to the H-shaped steel G3 of the retaining wall G1. The cylindrical member 1 may be directly attached and supported.

  In the present embodiment, the discharge hole 1e provided at the tip 1a of the cylindrical member 1 is a slit. However, for example, as shown in FIG. 8, the discharge hole 1e penetrates from the outer surface to the inner surface. There may be. Further, in the present embodiment, the nut 1 is fixed to the rear end 1c side of the cylindrical member 1 to form the connecting portion 1d. For example, the connecting portion 1d is provided in the inner hole H2 of the cylindrical member 1. In addition, the connecting portion 1d of the cylindrical member 1 and the separator core material 2 are detachably connected by fastening screws, but this is not restrictive. For example, the separator core material 2 is connected. A configuration may be adopted in which the portions 1d are fitted to each other so as to be detachable.

Moreover, in this embodiment, although the protective member 4 which protects the separator core material 2 shall be provided, the protective member 4 does not necessarily need to be comprised, and it is embed | buried in concrete after constructing an underground wall. The separator core material 2 is removed, and the water-stopping material is supplied to the inner hole H2 of the cylindrical member 1 communicated by supplying the water-stopping material to the concrete hole defined by the removed separator core material 2. It may be. Furthermore, in this embodiment, the protective member 4 is made of vinyl chloride, but the protective member 4 may be formed of other materials. In addition, although the water stop member 5 is provided around the protection member 4, the water stop member 5 may be provided around the cylindrical member 1. And the cylindrical member 1 may be provided on both members . Et al is, in the present embodiment, it is assumed that the elastic member 6 is sponge, may be other elastic member such as rubber.

  Moreover, in this embodiment, although the separator core material 2 shall be formed in 2/2 5 mm, it is not necessary to limit to this.

It is a figure which shows the separator for formwork which concerns on one Embodiment of this invention. It is a figure which shows the installation condition of the cylindrical part and elastic member at the time of installing a formwork using the separator for formwork which concerns on one Embodiment of this invention. It is a figure which shows the installation condition of the separator part at the time of installing a formwork using the separator for formwork which concerns on one Embodiment of this invention. It is a figure which shows the installation condition of the protection member at the time of installing a formwork using the separator for formwork which concerns on one Embodiment of this invention. It is a figure which shows the installation condition of the positioning member at the time of installing a formwork using the separator for formwork which concerns on one Embodiment of this invention. It is a figure which shows the formwork installation condition at the time of installing a formwork using the separator for formwork which concerns on one Embodiment of this invention. It is a figure which shows the condition which inject | pours a water stop material using the separator for formwork which concerns on one Embodiment of this invention. It is a figure which shows the modification of the separator for formwork which concerns on one Embodiment of this invention.

Explanation of symbols

1 Cylindrical member (cylindrical part)
DESCRIPTION OF SYMBOLS 1a Front end 1b Main body part 1c Rear end 1d Connection part 1e Discharge hole 1f Female thread part 1g Female thread part 2 Separator core material (separator part)
2a Male thread part 3 Positioning part 3a Positioning member 3b Screw rod 3c Female thread part 4 Protective member 5 Water stop member 6 Elastic member 7 Mold frame 10 Screw bit A Formwork separator C Basement wall G Ground G1 Earth retaining wall G2 Wall surface G3 H-shape steel (parent pile)
O1 axis

Claims (2)

A separator for formwork that is used to construct a concrete underground wall and holds the formwork at an arbitrary interval from the ground side,
A steel-made substantially cylindrical tubular portion whose front end is disposed on the ground side, a rod-like separator portion whose one end is detachably connected to a connecting portion at the rear end of the tubular portion, and the separator portion A positioning portion that is detachably connected to the other end of the tube and holds the formwork, and a water-stopping material that is injected between the ground side and the underground wall is discharged to the distal end side of the tubular portion. discharge holes are provided for,
The discharge hole is a through-hole penetrating from the outer surface to the inner surface of the cylindrical portion, or a slit cut out from the front end to the rear end of the cylindrical portion, and the circumference of the axial center of the cylindrical portion. There are four or more equally spaced in the direction,
A ring-shaped water-stopping member supported by being mounted between the tip of the cylindrical part and the tip of the positioning part is provided;
An elastic member that prevents the inflow of impurities into the cylindrical portion while allowing the water blocking material to be discharged from the discharge hole is attached to the distal end side of the cylindrical portion,
The connecting portion of the tubular portion is provided with a female screw portion, the separator portion is provided with a male screw portion on the one end side and the other end side, and the positioning portion is provided with a female screw portion. The cylindrical part and the separator part, and the separator part and the positioning part are detachably connected by screwing the male screw part and the female screw part,
A female screw portion is provided on the tip side of the cylindrical portion, and the female screw portion is screwed into a male screw portion on the rear end side of the screw bit attached to the ground side to support the cylindrical portion. Formwork separator characterized by In the separator for formwork according to claim 1,
A cylindrical protection member is provided between the rear end of the cylindrical portion and the tip of the positioning portion, and the separator portion is inserted therethrough to protect the separator portion ;
The protective member is provided so as to be sandwiched between the cylindrical portion and the positioning portion,
A gap is provided between the outer peripheral surface of the separator part and the inner surface of the protective member, and the protective member and the separator part are arranged so that the axes thereof are substantially coaxial. Formwork separator.

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