JP5284888B2 - Water hose injection hose and water stop material injection method for concrete joint - Google Patents

Description

  The present invention relates to a hose for injecting a water-stopping material for water-stopping a joint portion of concrete and a method for injecting a water-stopping material into a concrete joint portion.

  It is difficult to ensure the integrity of the joint portion of concrete, and water leakage is likely to occur. For this reason, conventionally, a water stop treatment is applied to the joint portion of concrete to take measures against water leakage.

  In order to prevent this type of water leakage, a water stop material injection hose (resin penetration hose) is installed on the joint surface of the precast concrete, and the post-cast concrete is driven so that this water stop material injection hose is buried. There is a method (water stop method) in which a water stop material is supplied to a hose for water stop material injection after being installed and cured for a required period of time, and the water stop material is injected into a gap generated in the joint (for example, Patent Document 1). reference).

  For example, as shown in FIG. 4, the water stopping material injection hose A is wound around the outer circumference of the net hose (tube material) 1 and the plurality of net hoses 1, 1 and these plural net hoses 1, 1 are arranged in parallel. A glass cloth (mesh-like base material (base fabric)) 2 that is integrally held in a bundled state, and the net hose 1 and 1 are disposed along the extending direction and attached to the outer surface of the glass cloth 2 The belt-shaped nonwoven fabric 3 is provided.

  The water stop material injection hose A formed in this way is installed by attaching an injection pipe on one end side and a discharge pipe on the other end side, and bringing the nonwoven fabric 3 into contact with the joint surface C2 of the precast concrete C1. Then, after the post-cast concrete is placed, when a water-stopping material is pressurized and supplied into the net hoses 1 and 1 through the injection pipe, the nets of the net hoses 1 and 1 (tube through holes 1a), the glass cloth 2 The water-stopping material flows out of the water-stopping material injection hose A through the mesh (through hole 2a of the base material) and the gap between the nonwoven fabrics 3. The water-stopping material that has flowed out of the water-stopping material injection hose A sequentially permeates the gaps in the joint portion T. Thereby, the clearance gap of the joint part T, ie, the flow path of the water leak of the joint part T, is obstruct | occluded by the water stop material, and it becomes possible to prevent generation | occurrence | production of water leak.

  Note that water-crosslinking polyurethane is often used as the water-stopping material, and when this water-stopping material is used, water is first injected into the gap of the joint portion T by the water-stopping material injection hose A. Keep it. And if a water stop material is made to osmose | permeate into the clearance gap between the joint parts T from the water stop material injection | pouring hose A, this water stop material will react with water and will expand and expand. Thereby, the clearance gap between the joint parts T is obstruct | occluded with a water stop material.

JP 2005-164003 A

  However, in the conventional water stop material injection hose, when the post-cast concrete is placed, the net of the entire net hose (through hole of the pipe material) and the network of the entire glass cloth (through hole of the base material) communicate with each other. Yes. That is, the entire inside of the net hose communicates with the outside of the water stop material injection hose over the entire outer periphery of the water stop material injection hose. For this reason, when applied to post-cast concrete, especially when applied to civil engineering structures with large wall thicknesses that generate large amounts of bleeding water or nose, bleeding water or noro flows into the water stop in the net hose. There was a problem that the material, the water flow path, and the like were blocked, and the water stop material could not be injected into the joint.

  In view of the circumstances described above, the present invention prevents bleeding water and noro generated when pouring concrete from flowing into the distribution path and reliably and suitably injects a water-stopping material into the joint. An object of the present invention is to provide a hose for injecting a water-stopping material and a method for injecting the water-stopping material into a concrete joint.

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

  The water stop material injection hose of the present invention is a water stop material injection hose for water stopping a joint portion of concrete, and includes a pipe member having a through-hole penetrating from the inner surface to the outer surface, and from the inner surface to the outer surface. A portion having a through-hole penetrating and covering the outer periphery of the tubular material; and a non-woven fabric provided to overlap the base material so as to cover a part of the outer periphery of the base material; It is characterized by being formed by applying a self-hardening material to the outer periphery of the removed base material.

  Further, the water stop material injection hose of the present invention is a water stop material injection hose for water stop treatment of a joint portion of concrete, and includes a pipe member having a through-hole penetrating from the inner surface to the outer surface, and an inner surface. A base material that has a through-hole penetrating on the outer surface, covers the outer periphery of the plurality of tube materials, and integrally holds the plurality of tube materials in a state of being bundled in parallel, and covers a part of the outer periphery of the base material A non-woven fabric layered on the base material, and is formed by applying a self-hardening material to the outer periphery of the base material excluding a portion where the non-woven fabric overlaps.

  In these inventions, when the waterproofing material injecting hose is placed with the nonwoven fabric in contact with the joint surface of the precast concrete, and the postcast concrete is placed so as to bury the waterproofing material injecting hose In addition, since the outer periphery of the base material excluding the portion where the nonwoven fabric overlaps is covered with a self-hardening material, bleeding water and noro generated during the placement of post-cast concrete, the pipe through-hole, It is possible to prevent the water stop material from flowing into the flow path (in the water stop material injection hose) through the through hole of the base material.

  In the water stopping material injection hose of the present invention, the self-hardening material is preferably a polymer cement mortar.

  In the present invention, the self-hardening material (polymer cement mortar) can be easily applied to the outer periphery of the substrate excluding the portion where the nonwoven fabric overlaps, and the polymer cement mortar is applied by curing the polymer cement mortar. It is possible to reliably close the through hole of the base material in the part. Thereby, it is possible to easily and reliably prevent bleeding water and noro from flowing into the flow path of the water-stopping material through the through hole of the pipe member and the through hole of the base material.

  Furthermore, in the water stopping material injection hose of the present invention, it is more desirable that the nonwoven fabric is a perforated nonwoven fabric provided with a through hole penetrating from the inner surface on the base material side to the outer surface.

  In this invention, when the water stop material is pressurized and supplied into the pipe material and penetrates into the joint portion of the concrete, it reaches the non-woven fabric through the through hole of the pipe material and the through hole of the base material where the non-woven fabric is overlapped. The waterstop material can be quickly penetrated into the entire nonwoven fabric through the through hole of the nonwoven fabric. Accordingly, it is possible to promote the penetration of the water-stopping material from the nonwoven fabric into the gap between the joint portions of the concrete, and the water-stopping treatment can be performed efficiently.

  In the water stop material injection hose of the present invention, it is more desirable that the nonwoven fabric is a biodegradable nonwoven fabric.

  In this invention, after placing the post-cast concrete, the biodegradable non-woven fabric is dissolved by the alkali component of the concrete, water and heat of hydration, so that the inside of the pipe material, the through-hole of the pipe material, and the base of the portion where the non-woven fabric is overlapped. The through hole of the material can be directly communicated with the gap of the joining portion without passing through the gap of the nonwoven fabric. Accordingly, when the water-stopping material is pressurized and supplied into the pipe and penetrated into the concrete joint, it is possible to efficiently penetrate the water-stopper into the concrete joint.

  According to the method for injecting a water-stopping material into the concrete joint of the present invention, any one of the above water-stopping material injection hoses is installed with the nonwoven fabric in contact with the joint surface of the pre-cast concrete, After laying and embedding the water-stopping material injection hose in the post-cast concrete, the water-stopping material is injected into the water-stopping material injection hose to join the precast concrete and the post-cast concrete The water-stopping material is infiltrated into a gap between the portions.

  In the present invention, by using the above-mentioned hose for injecting the water-stopping material, it is possible to reliably infiltrate the water-stopping material into the gap between the joint portions of the concrete and to perform the water-stop treatment on the joint portions. .

  According to the water-stopping material injection hose of the present invention and the water-stopping material pouring method into the concrete joint, bleeding water and noro are placed inside the water-stopping material pouring hose by the self-hardening material when placing the post-cast concrete. Inflow can be prevented. As a result, the self-hardening material can prevent the flow path of the water stop material from being blocked by bleeding water or noro, and the water stop material is reliably and suitably injected into (infiltrated with) the gap between the joints. It becomes possible to perform a water stop treatment on the joint.

It is a perspective view which shows the hose for water stop material injection | pouring which concerns on one Embodiment of this invention. FIG. 2 is a view taken along line XX in FIG. 1. It is a figure which shows the method of performing a water stop process to the joint part of concrete using the hose for water stop material injection | pouring which concerns on one Embodiment of this invention. It is a perspective view which shows the hose for the conventional water stop material injection | pouring.

  Hereinafter, with reference to FIG. 1 to FIG. 3, a water-stopping material injection hose and a water-stopping material injection method to a concrete joint according to an embodiment of the present invention will be described. The present embodiment relates to a hose for injecting a water-stopping material for injecting a water-stopping material into a joint portion of the precast concrete and the post-cast concrete and applying a water-stopping treatment, and a water-stopping material injection method to the concrete joint portion. Is.

  As shown in FIGS. 1 and 2, the water stop material injection hose B of the present embodiment is configured to include two pipe materials 1, 1, a base material 2, a nonwoven fabric 3, and a self-hardening material 4. Yes. The tube material 1 is formed to have a through hole 1a that penetrates from the inner surface 1b to the outer surface 1c. In the present embodiment, a net hose is applied as the tube material 1. For this reason, in the pipe material 1 of this embodiment, the through-hole 1a is formed by the mesh, and the several through-hole 1a is uniformly formed in the whole pipe material 1 by this.

  The base material 2 is formed in a cloth shape such as a glass cloth, for example, and has a through hole 2a penetrating from the inner surface 2b to the outer surface 2c. And the base material 2 is integrally hold | maintaining in the state which bundled these pipe materials 1 and 1 covering the outer periphery of the two pipe materials 1 and 1 in parallel. That is, the base material 2 is wound around the outer periphery so that the two pipe materials 1 and 1 are bundled so that the two pipe materials 1 and 1 are inserted inside the base material 2. They are held together so as to be parallel and along the axis O2 of the base 2.

  The nonwoven fabric 3 of the present embodiment is a biodegradable nonwoven fabric formed using a biodegradable material, and is formed in a strip shape with a thickness of, for example, about 5 to 10 mm. Moreover, the through-hole 3a is formed in this nonwoven fabric 3 in the center of the width direction at predetermined intervals in the length direction. That is, the nonwoven fabric 3 is a perforated nonwoven fabric having a plurality of through holes 3a penetrating from the inner surface 3b to the outer surface 3c. And the nonwoven fabric 3 formed in this way is overlapped with the inner surface 3b in surface contact with a part of the outer periphery of the base material 2 (the lower outer surface 2c forming the outer periphery of the base material 2). It is installed. At this time, the nonwoven fabric 3 is extended from one end to the other end in the axis O2 direction of the base material 2 with the length direction in the same direction as the extending direction of the tube material 1.

  On the other hand, the self-hardening material 4 of the present embodiment is a polymer cement mortar, and is applied to the outer periphery of the base material 2 excluding a portion where the nonwoven fabric 3 overlaps. And the through-hole 2a of the outer peripheral part of the base material 2 except the part with which the nonwoven fabric 3 overlaps is obstruct | occluded by the polymer cement mortar 4 apply | coated and hardened | cured in this way.

  Next, a method for applying a water stop treatment to the concrete joint portion T using the water stop material injection hose B having the above-described configuration will be described, and the water stop material injection hose B and the concrete joint portion of this embodiment will be described. The operation and effect of the water-stopping material injection method to T will be described. In the present embodiment, the water-stopping material S injected into the joint portion T using the water-stopping material injection hose B is assumed to be water-crosslinked polyurethane that expands by reacting with water W and expands. .

  First, as shown in FIGS. 1 to 3 (FIG. 3A), a water stop material injection hose B is installed on the joint surface C2 of the precast concrete C1. At this time, the water stop material injection hose B is disposed in the concrete joint portion T so that the nonwoven fabric 3 (the outer surface 3c of the nonwoven fabric 3) contacts the joint surface C2 of the precast concrete C1. In addition, as shown in FIG. 3 (b), the water stop material injection hose B has an injection tube for injecting the water stop material S and water W for reaction with the pipe materials 1 and 1 into one end. 5 is attached to the other end with a water-stopping material S that has circulated through the pipes 1 and 1 and a discharge pipe 6 for discharging the water W.

  Next, post-cast concrete is laid so as to bury the water stop material injection hose B. At this time, particularly when a civil engineering structure having a large wall thickness is to be constructed, a large amount of bleeding water or nose is generated when the post-cast concrete is placed. On the other hand, in the water stop material injection hose B of the present embodiment, the outer periphery of the base material 2 excluding the portion where the nonwoven fabric 3 overlaps is covered with the polymer cement mortar 4. For this reason, at the time of placement of post-cast concrete, bleeding water and noro do not flow into the inside of the base material 2, and the through-holes 1 a of the pipe materials 1, 1 in the portions that serve as the flow paths of the water-stopping material S and water W The through-holes 2a of the base material 2 where the nonwoven fabric 3 overlaps the inside of the pipe materials 1 and 1 are not blocked by the inflow of bleeding water or noro.

  Moreover, in this embodiment, since the nonwoven fabric 3 is a biodegradable nonwoven fabric, when the post-cast concrete is cast and this concrete is hardened, the nonwoven fabric 3 is the alkaline component of concrete, water, and water at the time of curing. It gradually dissolves with Japanese heat. For this reason, after placing the post-cast concrete and curing for a required period, the through-hole 2a of the base material 2 and the through-hole 1a of the pipes 1 and 1 in the portion where the nonwoven fabric 3 is overlapped with the nonwoven fabric 3 are outside. Direct communication is established, and a flow path for the water stop material S and water W is secured.

  In the present embodiment, the water stop treatment is started when a certain required time has elapsed after the placement of post-cast concrete. In this water stop treatment, first, as shown in FIG. 3 (b), water W is pressurized and supplied into the pipe materials 1 and 1 of the water stop material injection hose B through the injection pipe 5. This water W flows out from the through-hole 1a (net hose mesh) of the pipe materials 1 and 1 because the flow path of the water stop material injection hose B is secured without inflow of bleeding water or noro. Furthermore, it flows out to the outside of the water stop material injection hose B through the through hole 2a of the substrate 2 and the nonwoven fabric 3 in a dissolved state. And the water W which flowed out to the outer side of the hose B for water stop material injection | pouring in this way permeate | transmits the clearance gap of the joint part T one by one. The state of penetration of water W (and water stop material S, which will be described later) into the gap of the joint portion T is confirmed by observing the discharge amount discharged from the discharge pipe 6 and the leakage state from the joint portion T. To do.

  Next, after allowing water W to penetrate into the joint portion T, the water stop material S is pressurized into the pipe materials 1 and 1 of the water stop material injection hose B through the injection pipe 5 as shown in FIG. Supply. Since the water stop material S supplied in this manner has a flow path for the water stop material injection hose B, the through holes 1a of the pipe materials 1 and 1 and the base material 2 pass through in the same manner as the water W described above. It flows out reliably through the hole 2a and the nonwoven fabric 3 in a dissolved state. Then, the water blocking material S sequentially penetrates into the gap generated in the joint portion T, and simultaneously reacts with the water W to expand and expand, thereby closing the gap generated in the joint portion T. Thereby, the flow path of the water leakage of the joint portion T is blocked by the injection of the water stop material S (water stop processing is performed on the joint portion T), and the occurrence of water leakage is reliably prevented.

  Moreover, since the nonwoven fabric 3 of this embodiment is a perforated nonwoven fabric provided with the through-hole 3a which penetrates from the inner surface 3b to the outer surface 3c at this time, the nonwoven fabric 3 is penetrated through the through-hole 2a of the base material 2 of the part which overlapped the nonwoven fabric 3. The water-stopping material S and water W that have reached the depth of the nonwoven fabric 3 penetrate through the through-holes 3a of the nonwoven fabric 3 at an early stage. Thereby, the penetration of the water-stopping material S and water W from the nonwoven fabric 3 into the gap of the joint portion T is promoted, and the water-stopping treatment can be performed efficiently.

  Furthermore, as shown in FIG. 2, when installing the water stop material injection hose B in the joint portion T, depending on the situation, the poor blending mortar 7 or the like is laid on both sides of the water stop material injection hose B. It may be. By laying the poor blending mortar 7 and the like in this manner, it is possible to further improve the injection efficiency of the water-stopping material S and water W.

  Therefore, in the water-stopping material injection hose B and the water-stopping material injection method to the concrete joint portion T of the present embodiment, the water-stopping material injection hose B is bonded to the nonwoven fabric 3 on the joint surface C2 of the precast concrete C1. When the post-cast concrete is laid so as to bury the water stop material injection hose B, the outer periphery of the base material 2 excluding the portion where the nonwoven fabric 3 overlaps is a self-hardening material (polymer cement) Because of this self-hardening material 4, bleeding water and noro generated during the placement of post-cast concrete are stopped through the through holes 1 a of the pipe materials 1, 1 and the through holes 2 a of the base material 2. It is possible to prevent the water material S from flowing into the flow path (in the water stop material injection hose B).

  Further, by using polymer cement mortar as the self-hardening material 4, the self-hardening material 4 can be easily applied to the outer periphery of the base material 2 excluding the portion where the nonwoven fabric 3 overlaps, and the polymer cement mortar 4 is cured. As a result, it is possible to reliably close the through hole 2a of the base material 2 in the portion where the polymer cement mortar 4 is applied. Thereby, it is possible to easily and reliably prevent bleeding water and noro from flowing into the flow path of the water blocking material S through the through holes 1a of the pipe materials 1 and 1 and the through holes 2a of the base material 2.

  Further, the non-woven fabric 3 is a perforated non-woven fabric provided with a through hole 3a penetrating from the inner surface 3b on the base material 2 side to the outer surface 3c. When the nonwoven fabric 3 is penetrated, the water-stopping material S that has reached the nonwoven fabric 3 through the through-hole 2a of the base material 2 in the portion where the through-hole 1a of the tubular materials 1 and 1 and the nonwoven fabric 3 are overlapped is penetrated. Through the hole 3a, the entire nonwoven fabric 3 can be quickly penetrated. Thereby, penetration of the water stop material S from the nonwoven fabric 3 to the gap between the joint portions T of the concrete can be promoted, and the water stop treatment can be performed efficiently.

  Further, since the non-woven fabric 3 is a biodegradable non-woven fabric, after the post-cast concrete is placed, the non-woven fabric 3 is dissolved by the alkali component of concrete, water and heat of hydration, so , 1 and the through hole 2a of the base material 2 where the nonwoven fabric 3 is overlapped can be directly communicated with the gap of the joint portion T without passing through the gap of the nonwoven fabric 3. Thus, when the water-stopping material S is pressurized and supplied into the pipes 1 and 1 and penetrated into the concrete joint portion T, the water-stopping material S is efficiently penetrated into the concrete joint portion T. Is possible.

  Therefore, according to the water-stopping material injection hose B and the water-stopping material injection method to the concrete joint portion T of the present embodiment, bleeding water and noro are stopped by the self-hardening material 4 when the post-cast concrete is placed. It can prevent flowing into the material injection hose B. As a result, the self-hardening material 4 can prevent the flow path of the water-stopping material S from being blocked by bleeding water or paste, and the water-stopping material S can be reliably and suitably injected into the gap of the joint portion T (penetration). It is possible to perform a water stop treatment on the joint portion T.

  As mentioned above, although one embodiment of the water-stopping material injection hose according to the present invention and the water-stopping material injection method to the concrete joint portion has been described, the present invention is not limited to the above-described embodiment, and the gist thereof As long as it does not deviate from the above, it can be appropriately changed. For example, in this embodiment, it is assumed that the pipe materials 1 and 1 are net hoses, and the base material 2 is a glass cloth. However, the pipe materials 1 and 1 and the base material 2 according to the present invention have inner surfaces 1b and 2b. Through-holes 1a, 2a penetrating the outer surfaces 1c, 2c, that is, through-holes 1a, 2a for allowing the water-stopping material S supplied to the inside of the pipes 1, 1 to flow out when the water-stopping material S is injected. It does not have to be a net hose or glass cloth.

  In addition, the water stop material injection hose B is formed by holding the two pipe members 1 and 1 with the base material 2, but the number of pipe members is one or three, Also good. And even if it is a case where the hose for water stop material injection | pouring is comprised in this way, of course, it is possible to acquire the effect similar to this embodiment.

  Furthermore, although the nonwoven fabric 3 is a biodegradable nonwoven fabric or a perforated nonwoven fabric, it may be a simple nonwoven fabric conventionally used.

1 Pipe material (net hose)
1a Through hole (mesh)
1b Inner surface 1c Outer surface 2 Base material (glass cloth)
2a Through hole (mesh)
2b Inner surface 2c Outer surface 3 Nonwoven fabric (biodegradable nonwoven fabric, perforated nonwoven fabric)
3a Through hole 3b Inner surface 3c Outer surface 4 Self-hardening material (polymer cement mortar)
5 Injection pipe 6 Discharge pipe 7 Poorly mixed mortar A Conventional water-stopping material injection hose B Water-stopping material injection hose C1 Precast concrete C2 Joint surface O1 Pipe material axis O2 Base material axis T Concrete joint part

Claims (6)

A hose for injecting a water-stopping material for water-stopping the joint part of concrete,
A tube having a through-hole penetrating from the inner surface to the outer surface; a substrate having a through-hole penetrating from the inner surface to the outer surface; covering the outer periphery of the tube; and the base material covering a part of the outer periphery of the substrate And a non-woven fabric provided on top of each other,
A hose for injecting a water-stopping material, which is formed by applying a self-hardening material to an outer periphery of the base material excluding a portion where the nonwoven fabric overlaps. A hose for injecting a water-stopping material for water-stopping the joint part of concrete,
A tube having a through-hole penetrating from the inner surface to the outer surface and a through-hole penetrating from the inner surface to the outer surface, covering the outer periphery of the plurality of the tube materials, and holding the plurality of tube members in a bundle in parallel A non-woven fabric provided on the base material so as to cover a part of the outer periphery of the material and the base material,
A hose for injecting a water-stopping material, which is formed by applying a self-hardening material to an outer periphery of the base material excluding a portion where the nonwoven fabric overlaps. In the hose for water-stopping material injection according to claim 1 or 2,
A hose for water-stopping material injection, wherein the self-hardening material is polymer cement mortar. In the hose for water-stopping material injection in any one of Claims 1-3,
A hose for water-stopping material injection, wherein the non-woven fabric is a perforated non-woven fabric provided with a through hole penetrating from the inner surface on the base material side to the outer surface. In the hose for water-stopping material injection in any one of Claims 1-4,
A hose for water-stopping material injection, wherein the nonwoven fabric is a biodegradable nonwoven fabric.   The water stop material injection hose according to any one of claims 1 to 5 is installed by bringing the nonwoven fabric into contact with a joint surface of precast concrete, and postcast concrete is placed to form the water stop material. After the injection hose is embedded in the post-cast concrete, the water-stop material is injected into the water-stop material injection hose, and the water-stop material is inserted into a gap between the cast-in concrete and the post-cast concrete joint portion. A method for injecting a water-stopping material into a concrete joint, characterized by impregnating water.

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