JP2006097290A - Grout injection hose doubling as water-swelling cutoff board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grout injection hose doubling as a water-swelling cutoff board, which eliminates complicated grout sucking removal procedures, facilitates discharge of grout from the pipe, and achieves positive grout injection and effective water cutoff even at a gap formed with the lapse of time after injection of the grout. <P>SOLUTION: The grout injection hose 1 doubling as the water-swelling cutoff board is embedded in a concrete-jointed portion, and formed by partially bonding a water-swelling cutoff board member 3 abutting on an existing concrete side of the concrete-jointed portion, to a grout injection hose main body 2 made of a non-water-swelling resin. Thus according to the structure of the grout injection hose doubling as the water-swelling cutoff board, both side surfaces composed of a water-swelling resin and the grout injection hose main body function as grout discharge portions. Preferably, the grout injection hose main body is a hollow cylinder having a grout flowing section 4, and grout introducing sections are formed and extended from a surface of the grout injection hose main body, that abuts on the water-swelling cutoff board member, to the grout flowing section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a grouting pouring hose that also serves as a water expansion water stoppage plate that injects a grouting material into a concrete joint, and is particularly useful when handing over concrete by a reverse casting method.

  Conventionally, a grout method has been used as a water stop method for a concrete joint. The grafting method is a method in which water is stopped by embedding a grout injection pipe in a concrete joint and injecting a grout material into a void generated by shrinkage accompanying the hardening of the concrete.

  However, the above grout method has a problem that the placed concrete shrinks with time and a small gap is gradually formed between the grout material and the concrete, so that the water stop effect deteriorates with time.

  In addition, there is also a water stop method that embeds a water expansion water stop plate in the concrete joint. However, in this water stop method, although a water stop effect is obtained, there is a problem in structural strength if there is a gap in the frame. In particular, it was a serious problem in the concrete joints that were cast by reverse casting.

  In order to eliminate such drawbacks, Patent Document 1 includes a slit-like through-hole formed from an inner layer, which is a non-water-expandable hollow flexible tube, and an outer layer, which is a water-expandable rubber, reaching the hollow portion from the surface. A joint sealing material is described.

  Patent Document 2 describes a method in which after grout is injected, the inside of the tube is sucked to regenerate the grout injection tube, and the grout is injected again into the gap generated over time.

  However, the hollow flexible tube described in Patent Document 1 has a drawback that the grout discharge portion has a large resistance and the grout is difficult to discharge.

  Further, the method described in Patent Document 2 requires a step of sucking and removing the grout remaining in the grout injection tube, which is complicated.

Japanese Patent Publication No. 7-74513 Japanese Patent No. 3151690

  Therefore, the object of the present invention is that it does not require complicated grout suction and removal, and it is easy to discharge the grout from the tube, and it is also effective for reliable grout injection and gaps that occur over time after grout injection. Another object of the present invention is to provide a grouting hose that is also used as a water expansion water stop plate and that can perform a specific water stop.

  The present inventors have reached the present invention as a result of intensive studies in view of the above problems. That is, the present invention relates to a water expansion water stop plate combined grout injection hose embedded in a concrete joint, a water expandable water stop plate member in contact with an existing concrete side of the concrete joint, and a non-water expandable member. A grout injection hose body made of a resin material is partly bonded, and both side surfaces composed of a water-expandable resin material and a grout injection hose body are grout discharge portions for discharging grout. It is a grout injection hose that is also used as a water expansion stop plate.

  Further, according to the present invention, the grout injection hose body has a hollow cylindrical shape having a grout circulation part at a substantially central portion in the longitudinal direction, and extends from the surface in contact with the water-expandable water stop plate member of the grout injection hose body to the grout circulation part. It is the above-described grout injection hose also serving as a water expansion water stop plate, in which a grout lead-out portion is provided.

  Further, according to the present invention, the side surface portion of the grout injection hose body that contacts the water-expandable water stop plate member is formed in a bowl shape having a wedge-shaped cross section. It is the above-described grout injection hose that is also used as a water expansion water stop plate.

  Further, according to the present invention, the partial adhesion between the water-expandable water stop plate member and the grout injection hose body does not inhibit the grout discharge from the grout discharge portion and / or the position where the grout discharge from the grout discharge portion is not obstructed. The above-described grout injection hose also serving as a water expansion water stop plate, which is made with strength.

  The effect of the present invention does not require complicated grout suction and removal, and is easy to discharge the grout from the tube, and is effective for reliable grout injection and gaps that occur over time after the grout injection. The present invention provides a grouting pouring hose that can also be used for water expansion and also serves as a water expansion water stopping plate.

  The grouting pouring hose also used as a water expansion water stop plate of the present invention functions as a grouting pouring hose for burying grouting material in a gap generated by concrete shrinkage, etc. To do. Furthermore, the grout injection hose also used as a water expansion water stoppage plate of the present invention is a case where a gap is further generated due to concrete shrinkage with the passage of time after injecting the grout material into the concrete connection part and filling the gap in the concrete connection part In addition, the water-expandable water stop plate member is expanded by moisture such as rainwater that has entered from the outside, and can fill the gap and stop the water.

  The non-water-swellable resin material that constitutes the grout injection hose body is not particularly limited, and has appropriate hardness, appropriate flexibility, appropriate elasticity, etc. that have been conventionally used as a grout injection hose. A non-water-swellable resin material can also be used, for example, a vulcanized hard rubber material can be used.

  The water-swellable waterstop plate member is not particularly limited as long as it is made of a water-swellable resin material, and is a water-swellable resin conventionally used for joints of concrete, such as a water-swellable resin. Urethane resin or the like can be used.

  The grouting injection hose combined with the water expansion water stop plate of the present invention comprises a grouting injection hose main body and a water expandable water stopping plate member made of a non-water expandable resin material. The plate member is partially bonded.

  Here, in the present invention, the partial adhesion between the grout injection hose main body and the water-expandable waterstop plate member is not necessarily limited to the "partial" adhesion spatially. What is necessary is just to make it the intensity | strength which does not inhibit the discharge of the grout from the position which does not inhibit the discharge of a grout, and / or the grout discharge part.

  The grouting pouring hose body of the grouting pouring hose combined with the water expansion water stop plate of the present invention preferably has a hollow tubular grouting part at the substantially central portion in the longitudinal direction, and the swellability of the grouting pouring hose body. A grout lead-out part may be provided from the surface in contact with the water stop plate member to the grout circulation part. In this case, the grout material to be injected comes into contact with the water-expandable water stop plate member from the grout circulation part through the grout lead-out part. As described above, the grout injection hose body and the water-expandable water stop plate member are bonded with a position that does not inhibit the grout discharge from the grout discharge part and / or with a strength that does not inhibit the grout discharge from the grout discharge part. The grout material is discharged from the grout injection hose also serving as a water expansion water stoppage plate according to the present invention, with both side surface portions constituted by the water-expandable resin material and the grout injection hose body as grout discharge portions.

  The grout injection hose main body of the grouting injection hose combined with the water expansion water stop plate of the present invention is preferably configured in a bowl shape in which the side surface portion in contact with the water expandable water stopping plate member of the grout injection hose main body has a wedge-shaped cross section. The grout discharge part may be configured together with the side part of the water-expandable water stop plate member. As a result, the concrete does not flow back when the grout is not discharged, and the grout material can be easily discharged.

  Embodiments that are embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic perspective view of a grouting pouring hose also serving as a water expansion stop plate according to the present invention. As shown in FIG. 1, the water expansion water stop plate combined grout injection hose 1 of the present invention includes a grout injection hose body 2 and a water expandable water stop plate member 3. The grout injection hose body 2 has a hollow cylindrical shape having a grout circulation part 4 at a substantially central part in the longitudinal direction.

  FIG. 4 is a schematic cross-sectional view of the grouting pouring hose 1 also serving as a water expansion water blocking plate. As understood from FIG. 4, the grout injection hose body 2 is provided with a grout lead-out part 5 a and a grout lead-out part 5 b from the grout circulation part 4 to the surface of the grout injection hose body 2 that contacts the water-expandable water stop plate member 3.

  A side surface portion of the grout injection hose main body 2 that is in contact with the water-expandable water stop plate member 3 is formed in a bowl shape having a wedge-shaped cross section, and has a bowl-like part 6a and a bowl-like part 6b. The hook-like part 6a and the hook-like part 6b constitute a grout discharge part together with the tapered part 7a and the tapered part 7b constituting the side face part of the water-expandable waterstop plate member 3.

  The grouting material injected into the grouting injection hose 1 also serving as a water expansion water stoppage plate is first guided to the grouting part 4, and then passes through the grouting part 5a and the grouting part 5b, and the hook part 6a, the hook part 6b, It is comprised so that it may discharge | emit from the grout discharge part comprised by the taper-shaped part 7a and the taper-shaped part 7b.

  Since the bowl-shaped portion 6a or 6b is formed in a bowl-like shape having a wedge-shaped cross section, the concrete does not enter the inside of the grout pouring hose 1 also serving as a water expansion waterproofing plate even when placing concrete, and the grout There is no significant hindrance to grout discharge when the material is discharged. Since this function is achieved exclusively by the hook-like portion 6a and the hook-like portion 6b, the shape of the water-expandable waterstop plate member 3 is arbitrary, and may be a simple plate shape, that is, a rectangular cross section. A trapezoidal cross section having tapered portions 7a and 7b as shown in FIG. 4 is more preferable.

  FIG. 2 is a schematic perspective view of the grout injection hose body 2, and FIG. 3 is a schematic perspective view of the water-expandable water stop plate member 3. The position of the grout lead-out portion provided in the grout injection hose body 2 is not particularly limited, but in this embodiment, it is arranged in a staggered manner as 5a and 5b as shown in FIG. By arranging in this way, it is preferable in that the grout material can be discharged almost equally to the left and right with respect to the longitudinal direction of the grouting pouring hose 1 also serving as a water expansion water stoppage plate.

  The water-expandable water stop plate member 3 and the grout injection hose body 2 are partially bonded in the above-described meaning. In the embodiment, the substantially central portion of the surface located at 5a and 5b in FIG. In the longitudinal direction, an adhesive is applied at intervals of 50 mm (excluding portions 5a and 5b) to partially bond the water-expandable water stop plate member 3 and the grout injection hose body 2 together. In FIG. 2, the adhesive is omitted, and about two grout lead-out portions are arranged per 50 mm in the longitudinal direction.

  FIG. 5 is a schematic cross-sectional view showing an installation example of the grouting pouring hose 1 also serving as a water expansion water stop plate. The grouting pouring hose 1 also used as a water-expanding water-stopping plate is adhered to the precast concrete 8 by applying an adhesive to the surface of the water-expanding water-stopping plate member 3 opposite to the surface in contact with the grout pouring hose body 2 (adhesion The illustration of the agent is omitted). Further, the grout injection hose 1 also serving as a water expansion water stop plate is fixed by a fastener 9. The fastener 9 is driven into the precast concrete 8 and is configured not to be easily detached. Moreover, the fastener 9 is comprised so that it can hold | maintain so that the grout injection | pouring hose main body 2 of the water expansion | swelling water stop board combined grouting injection hose 1 may be held.

  FIG. 6 is a schematic cross-sectional view (the illustration of the fastener 9 is omitted) showing the situation when the grout material is injected using the grout injection hose 1 also serving as a water expansion water stoppage plate. After placing the precast concrete 8, the water expansion water stoppage / grouting pouring hose 1 is installed, and when the postcast concrete 11 is cast thereafter, the gap 10 is formed by contraction of the postcast concrete 11. The grouting material discharged from the grouting pouring hose 1 also serving as a water expansion / stop plate is filled in the gap 10. Here, the grout material that can be injected using the water expansion water stoppage combined grout injection hose of the present invention is not particularly limited, and it is known that it can be used for injection into conventional concrete joints. All grout materials can be used.

  When the grout material is filled in the gap portion 10 and hardened, the concrete connection portion is stopped. However, after the placement, when the concrete further shrinks with time, a slight gap is further generated. When the cast concrete is an underground structure, groundwater or the like enters through this slight gap, but the water expansion water stoppage combined grout injection hose 1 has a water expansion water stoppage plate member 3. When the invaded water comes into contact with the water-expandable water stop plate member 3, the water expandable water stop plate member 3 absorbs this water and expands, and the water expansion water stop plate combined grout injection hose 1 is made up of upper and lower concrete, That is, it is strongly pressed against the pre-cast concrete and the post-cast concrete. For this reason, the invading water cannot penetrate further into the interior.

  FIG. 7 is a schematic side view showing an example of connection of a water expansion water blocking plate combined grout injection hose with an external hose. Although the grout injection hose which is also used as a water expansion water stop plate of the present invention is installed in a concrete joint, it is necessary to inject the grout material from the outside. At this time, any hose may be connected between the external grout material injector and the grout injection hose also serving as a water expansion water stop plate. That is, as shown in FIG. 7, the external hose 13 may be inserted into the grout circulation part 4 of the grout injection hose body 2 and sealed with the adhesive tape 12.

  As described above, according to the present invention, complicated grout suction removal is not required, and the grout can be easily discharged from the tube. However, effective water stop can be performed.

It is a typical perspective view which shows 1 aspect of the grout injection hose used also as the water expansion water stop board of this invention. It is a typical perspective view which shows 1 aspect of the grout injection hose main body used for this invention. It is a typical perspective view which shows 1 aspect of the water-expandable water stop board member used for this invention. FIG. 2 is a schematic cross-sectional view of the grouting pouring hose also serving as a water expansion water stop plate of the present invention shown in FIG. 1. FIG. 2 is a schematic cross-sectional view showing an installation example of the water expansion water blocking plate combined grout injection hose shown in FIG. FIG. 2 is a schematic cross-sectional view showing a situation when a grout material is injected using the water expansion water blocking plate combined grout injection hose of the present invention shown in FIG. It is a typical side view which shows the example of a connection with the external hose of the grouting pouring hose combined with the water expansion | swelling water stop board of this invention shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water expansion water stop plate combined grout injection hose 2 Grout injection hose main body 3 Water expandable water stop plate member 4 Grout distribution | circulation part 5a Grout derivation | leading-out part 5b Grout derivation | leading-out part 6a ridge-shaped part 6b ridge-shaped part 7a taper-shaped part 7b taper shape Part 8 Precast concrete 9 Fastener 10 Gap 11 Postcast concrete 12 Adhesive tape 13 External hose

Claims (4)

A grout injection hose that is also used as a water expansion water stop plate embedded in a concrete joint, and is composed of a water expandable water stop member in contact with the existing concrete side of the concrete connection portion and a non-water expansion resin material. A water-expanding water stoppage plate, which is a part of the hose body that is partially bonded, and that both side surfaces composed of a water-expandable resin material and a grout injection hose body are grout discharge portions that discharge grout. Combined grout injection hose. The grout injection hose body has a hollow cylindrical shape having a grout circulation part at a substantially central portion in the longitudinal direction, and a grout lead-out part is provided from the surface in contact with the water-expandable water stop plate member of the grout injection hose body to the grout circulation part. The grouting pouring hose combined with a water expansion water stoppage plate according to claim 1, which is used. The side surface portion of the grout injection hose body that contacts the water-expandable water stop plate member is configured in a bowl shape having a wedge-shaped cross section, and constitutes the grout discharge portion together with the side surface portion of the water expandable water stop plate member The grout injection hose which is also used as a water expansion water stop plate according to claim 1 or 2. Partial adhesion of the water-expandable water stop plate member and the grout injection hose body is made at a position that does not inhibit the grout discharge from the grout discharge part and / or at a strength that does not inhibit the grout discharge from the grout discharge part. The grouting pouring hose combined with a water expansion water stoppage plate according to any one of claims 1 to 3.

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