JPH0960306A - Water-sealing tool for concrete structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leakage of a sealing agent, facilitate a construction work, increase the efficiency, and further, require no skillful techniques. SOLUTION: A water-sealing tool is provided with a body 1 having a fixing part 11 with fixing holes 11a, a middle part 12 with a dish-form section, and longitudinal ends 13 with holes 13a in which end members are fixed, packings 2 stuck thereto, and the end members fixing at the end or joining the body interposed between both ends and 13 and the concrete structure and having pouring holes for the sealing agent and air vent holes. The body and the end members with packing materials are put on the joints of the concrete structure and an impervious agent is poured in the space S. In this way, a sealing work can be efficiently carried out in a low cost.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a waterway, a tunnel,
The present invention relates to a waterproofing device for a concrete structure that prevents water leakage such as a connection portion or a crack of a concrete structure such as a dam.

[0002]

2. Description of the Related Art Conventionally, as a method of stopping water leakage from a connecting portion of a waterway or a tunnel, a crack, etc., conventionally, concrete such as a connecting portion is shaved into a V shape, and a water-stopping agent injection pipe is set at a tip portion thereof. However, a method is used in which the V-shaped portion is hardened with mortar to prevent leakage, and the water blocking agent is press-fitted into the gap of the connecting portion from the pipe. However, this method requires a lot of skill because of the difficulty of the construction, and it is accompanied by the dirt work such as the concrete chipping and the mortar hardening, and the working time is long. Further, since one-point or multi-point injection is performed, it is necessary to inject the waterproofing agent at a high pressure in order to infiltrate and fill the gap having a planar spread.

In contrast to such a general construction method, a method using a water-proofing agent enclosed box has been proposed (Japanese Patent Laid-Open No. 64-179).
No. 71). In this method, a waterproof box 50 as shown in FIG. 8 is used, a packing 60 is attached to the concrete surface, and a large number of the waterproof boxes 50 are arranged side by side on the concrete surface. By doing so, the water-stopping box is fixed, and the water-stopping solution is injected into the box.

However, in this method, since a box-shaped device is used, the peripheral portion 61 of the box is the bottom surface 62 of the box.
Since it has a flange effect to reinforce (the upper surface when used), the bending rigidity and the torsional rigidity when deforming the box are extremely large, so the tip around the box is usually a concrete structure with considerable unevenness. Does not fit on the surface.
As a result, there is no force to press the packing in the part around the tip of the box, the liquid of the waterproofing agent leaks from that part, and if the width of the leaked part is large, even if the liquid comes into contact with the air, the seal part There was a problem that it did not solidify and it was not easy to stop the liquid leakage. Therefore, if the thickness of the packing is partially adjusted, the construction becomes complicated and a lot of time is wasted.

Further, in the method of obtaining the sealing effect at the tip of the edge of the box, the pressing surface pressure becomes large, but the area of the sealing portion to be pressed and brought into contact with the box is small. Easy to do. Moreover, since the sealing surface is linear, there is no residence time for the leaking liquid, and although it is a liquid that originally has the property of solidifying when it comes into contact with air, it does not solidify at the sealing position because it goes into a free space. . Further, since the independent boxes are arranged, all the four sides are the sealing portions, so the sealing line becomes long and the liquid easily leaks.

Further, in this method, since a large number of independent boxes are used to stop water of a certain length, it is necessary to frequently inject the waterproofing agent and bleed air.
Since it is necessary to attach and detach individual pieces, there is a problem that the work is troublesome and the work time becomes long.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above problems in the prior art, prevents leakage of the waterproofing agent, is easy and efficient in construction, and does not require skill in construction. It is an object to provide a waterproof device for an object.

[0008]

In order to solve the above-mentioned problems, the present invention provides a water-stopping device for a concrete structure, which comprises a main body having a dish-shaped cross section and a length sufficiently long for its width. A sealing member provided on the end portion, and end members provided on both end sides of the main body portion, the main body portion having a main body attachment hole for attaching to a concrete structure, on both end sides in the width direction. The formed flat fixing part, the intermediate part continuously formed in a convex shape from the fixing part on the side opposite to the side to be attached to the concrete structure, and the connecting hole for connecting with the end member And both end portions in the opened length direction, the seal member is extended to at least a front side of both end portions in the length direction on both end sides in the width direction, the end member, Both ends of the body and concrete A jointed hole that is mounted between the structure and a joint hole that faces the joint hole, an end member attachment hole for attaching to a concrete structure, and a conduction hole that conducts from the inside of the intermediate portion to the outside. In addition to the above, the invention according to claim 2 is characterized in that the seal member is extended from the both end sides to a part of the intermediate portion in the width direction, and the invention according to claim 3 is In addition to the features of the invention of claim 1, the portion of the end member communicating with the outside of the conduction hole is thicker than other portions, and the invention of claim 4 is the invention of claim 1. In addition to the above feature, the end member is interposed between one of the main body and the other of the main body arranged at a predetermined angle in the lengthwise direction, is bent at the predetermined angle, and is bent. The end member mounting hole and the conduction on both end sides With the door, characterized in that.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a state in which packing is attached to a main body of a waterproofing device for a concrete structure of the present invention, and FIG. 2 shows end members. The main body 1 has a dish cross-section (a cross-section in which the dish is laid down in the figure) and has a length L that is long enough for the width W, and includes a body-mounting hole 11a for attaching to the concrete structure 100. FIG. 2 shows flat fixing portions 11 formed on both end sides in the width direction, an intermediate portion 12 formed on the opposite side to the side attached to the concrete structure in a continuous convex shape from the fixing portions 11, and FIG. Both end portions 13 are provided as a lengthwise end portion in which a coupling hole 13a for coupling with the end member 2 is opened.

The rubber packing 2 as a seal member is extended to the front of the both end portions 13 on both end sides in the width direction of the main body 1. And in this example, it is extended in the width direction from both end portions 11 to a part of the intermediate portion 12. Therefore, it is formed of a portion having a constant thickness and a portion having a larger thickness according to the inclination of the dish cross section of the main body. In this example, the rubber packing 2 is attached to both end portions 13
Although it is provided up to the front of the packing, as shown by the chain double-dashed line in FIG.
It may be attached to the whole of both end portions (including the central portion) of the main body 1 with a thickness of about mm.

The end member 3 is mounted between both ends 13 of the main body 1 and the concrete structure, and is connected to the connecting hole 13 of the main body.
a to be coupled hole 31 opposed to a, end member attachment hole 32 for attachment to a concrete structure, and intermediate portion 12
Space S formed between the inside of the building and the concrete structure
(FIG. 1) and a conduction hole 33 that conducts to the outside. In this example, the portion communicating with the outside of the conduction hole 33 is thicker than other portions by t. In addition, in consideration of the fact that a plurality of main bodies 1 are often provided as 1-1 and 1-2 adjacent to each other, the end member 3 is provided with the combined holes 31 and A conduction hole 33 is provided. That is, both side portions are in a step-down shape with respect to the central portion, and the main body 1
Both end portions 13 of are overlapped with each other and are tightened with screws to be integrated. When the packing 2 is thinned to extend to both ends of the main body 1 as shown by the chain double-dashed line in FIG. 1B, the main body 1 and the end member 3 are connected to each other through the packing. To be done. The main body portion and the end member may be joined by another joining method such as a rivet.

A thread groove is formed in the vertical hole portion of the conduction hole 33 so that the mouthpiece 34 or a cock, a valve or the like can be screwed in and attached. However, the screw groove may not be provided, and the cap or the like may be attached by clicking. When the end member 3 is attached to the concrete structure together with the main body portion 1, suitable packing is interposed between the end member 3 and the concrete surface or the main body portion as needed.

The body 1 is made of stainless steel, for example.
However, a steel plate, a metal such as aluminum, or a resin such as reinforced plastic may be used as long as it has a certain degree of strength and elasticity. The ratio of length to width is, for example, 5 to 10
A degree is desirable. The length is, for example, about 1 to 1.5 m. It is desirable that the portions forming the protrusions having the dish cross section that move from the fixed portions 11 at both ends to the intermediate portion 12 be bent with a certain degree of curvature. The shape of the convex section of the dish cross section is
Although it varies depending on the type of material of the main body used and the type of waterproofing agent, for example, the shape has a height of about 1/20 to 1/50 of the width.

The fixing portion 11 of the main body 1 does not necessarily have to be a horizontal surface, and may be inclined to some extent in order to increase the tightening effect of the packing at that portion. Further, the ceiling portion of the intermediate portion 12 may be curved and inflated instead of being flat. Since it is not necessary to provide a hole or the like for injecting the waterproofing agent in the main body portion 1, its plate thickness may be thin.

Due to the shape of the main body 1 and the properties to be provided, the main body 1 is extremely convenient when mounted on a concrete surface. First, since the fixing portion 11 is flat and has a constant width, the sealing width by the packing 2 is widened and the sealing surface is stabilized. Also, the fixed part 1
1 is flat, the height of the convex portion of the dish cross section is low, and the thickness of the plate material is thin, so that it has the same structural strength property as a flat plate having an appropriate thickness.

FIG. 3 shows various external force moments applied to the main body 1. The bending and torsional rigidity of the main body 1 are not so great in any direction, and the lateral bending moment M _{1 in the} width direction and the longitudinal bending moment M in the length direction are large.
_2. It is relatively easily elastically deformed with respect to the both-end torsion moment T ₁ , the local torsion moment T _2, etc. without buckling. Therefore, the main body 1 is attached to the mounting hole 1
Even when the concrete surface is not a flat surface when it is pressed against the concrete surface by 1a, a substantially uniform pressure contact force is obtained by the local or overall deformation of the main body portion 1, and the sealing property is secured. On the other hand, as shown in FIG. 1, the convex intermediate portion 1
An appropriate space S is formed between the concrete 2 and the packing 2 by the packing 2 and the liquid structure, so that the holding capacity of the liquid waterproofing agent and the fluidity in the interior are well secured.

The packing 2 is preferably adhered to the main body 1 in advance. It is desirable that both ends in the length direction have such a length that they are in pressure contact with the end member 3 when the main body 1 and the end member 3 are joined together. However, since it is not always easy to obtain the length accuracy, another packing may be interposed between the end member 3 and the packing 2 when the end member is attached.

FIG. 4 shows the operation of the packing 2 of this example. Needless to say, the packing 2 may be provided at positions corresponding to both end portions 11 which are originally tightened portions, and may be provided as such. However, when the packing 2 is extended to the intermediate portion 12 as in this example, as shown by the arrow, the main body 1 is attached to the concrete structure 100 to tighten the packing 2 with the force F and stop it in the space S. When the liquid medicine is press-fitted, a packing supporting force as indicated by a chain line arrow is generated in the swollen inclined part of the dish cross section in opposition to the packing pressing force P due to the internal pressure. As a result, the packing 2 is compressed and deformed as shown in the drawing, and the packing density between the main body 1 and the concrete surface is increased, and a good sealing effect is exhibited. Since the supporting force of the inclined portion is generated even in the middle of the pitch of the fastening positions at both ends, the sealing property is secured in the entire length of the main body 1.

The end member 3 is made of brass, for example. However, it may be cast. As a material, other than brass,
Other metals, resins, etc. can be used as in the main body 1. Since the main body 1 is convex so as to form the space S, and the end member 3 is configured to close the space by being combined with the main body 1, its cross section in the width direction is Space S
Since it has a thickness including, it becomes thicker than the main body 1 and necessarily has strength. Therefore, a certain amount of thickness can be obtained even in the conduction hole 33 portion, and it becomes easy to connect the waterproof agent injection port by screwing or the like. However,
In this embodiment, as described above, the central hole portion is further t
Only the thickness is increased.

The end member may have a short length because it is only necessary to stop or connect the end of the main body 1. Therefore, even with such a structure having a large thickness and sufficient strength, the material cost of the entire waterproofing device for the concrete structure is not significantly affected.

FIG. 5 shows a usage state of the water stopping device for the concrete structure as described above. As shown in FIG. 3A, when the gap 101, which is a joint or a water leak part of the concrete structure 100, is short as shown, one main body 1 and two end members 3 at both ends thereof are provided. To use. Although not shown because it is a normal construction method, first, the mounting hole 11a,
A hole is made in the concrete surface at a position corresponding to 32, and a screw seat for the anchor bolt is inserted and driven into the body so that the lead material on the back side expands the diameter to prevent it from coming off.
And the end members 3 are set at corresponding positions, bolts are inserted into all the mounting holes and screwed into the anchor screws, and the body 2 and the end members 3 are fixed to the concrete surface while compressing the packing 2 and the like.

In this case, the concrete surface is not flat,
Even if there is a dent or bulge to some extent, just by tightening the bolts in the mounting holes, the main body 1 flexes and deforms appropriately without depending on the variation in the amount of compression of the packing 2, so that it fits into the concrete surface, The packing can be pressed uniformly against the concrete surface.

When only one main body 1 is used as in the present example, an end member can be used in which the two-dot chain line portion shown in the figure, which is the non-counterpart of the main body, is omitted. However, the same end member as shown in FIG. 2 may be used for such an application in consideration of the merits of management due to the commonality of parts. In that case, the to-be-coupled hole 31 and the conduction hole 33 on the side having no main body to be coupled may be left unattended.

Next, a mouthpiece 34 as shown in FIG. 2 is screwed into the through hole 33, and a solution supply device for a waterproof agent (not shown) is connected to this, and the pump is used to connect the concrete surface and the main body through the through hole 33. A water blocking agent is injected into the space S with the space 1.
Some water-stopping agents have low viscosity to high viscosity and require a certain amount of pressure at the time of injection.According to this water-stopping tool, the packing is pressed evenly against the concrete surface, so some pressure is required. Liquid does not easily leak even when the temperature is high. or,
Even if the liquid leaks, since the length of the sealing surface is long, the liquid comes into contact with air during the leak to condense, the liquid itself exerts a sealing effect, and continuous leakage does not occur. Although the water blocking agent supply device is coupled to the one-sided conduction hole 33 of the end members 2 at both ends as described above, the conduction hole 33 of the other side end member is opened to leave the space S. After the air inside has escaped, screw in the blind plug.

There are various types of waterproofing agents, such as isocyanate type and water glass mixed with cement, which have a long solidification time and short ones. What kind of waterproofing agent should be used for this waterproofing device? It is also possible to use. When the water blocking agent is filled and sealed in the space S, the water blocking agent is foamed and expanded in that state depending on the size and depth of the gap 101, the type of the water blocking agent used, and the like. Either infiltrate into the gap or press-fit a water blocking agent and inject it into the gap with that pressure. In this case, the waterproofing agent is linearly injected into the gap from the entire length of the space S in the direction perpendicular to the concrete surface, so that a sufficient injection depth is obtained and the injection time is also increased. Shortened.

When the injection of the water blocking agent and its condensation are completed, the connection between the mouthpiece 34 and the water blocking agent supply device is released. In this case, if necessary, the cap 34 is mounted and removed. This completes the construction. If this method is used, the water stop construction can be completed in about 1/10 of the time required for the conventional V-cut construction method.
Further, it is expected that the construction will be much easier than the conventional box construction method, and the time required for the construction will be reduced to a fraction thereof. Furthermore, unlike the box of the prior art, the main body 1 has a small amount of protrusion from the concrete surface after construction. Therefore, when it is used in a portion where water flows such as the inner surface of a water channel, there is an advantage that almost no fluid resistance occurs. is there.

FIG. 2B shows an example in which the gap 101 is long and three sets of waterproofing devices are used. In this case as well, the construction method is the same as in the case of one set described above. End members 3-2 and 3-
3 has body parts 1-1, 1-2 and 1-2, 1-on both ends.
3 are combined. Therefore, as this end member, as shown in FIG. 2, a member having the coupled hole 31 and the conducting hole 33 on both sides is used. The end members 2-1 and 2-4 at both ends may not have the one side indicated by the two-dot chain line as described above.

FIG. 3C shows an example of stopping water in the tunnel 200. In this case, the main body 1 is attached to the concrete surface on the circumference. However, since the main body 1 is also flexible in the length direction, the main body 1 can easily be made to follow the concrete surface with respect to such a relatively large curvature.

FIG. 6 shows another example of the end member. In the figure, the cross section of the central portion is shown. The width direction has a shape similar to that of FIG. The end member 3'in this figure is interposed between one of the main body parts 1-1 and the other one of the main body parts which are arranged at a predetermined angle of 90 ° in the longitudinal direction, It is bent at the same angle of 90 °. The predetermined bending angle of the end member 3'may be larger or smaller than 90 °, or may be curved in a curved shape with a constant curvature, and the shape of the concrete structure to which the waterproof device is applied. It is set according to. For example, as shown by the chain double-dashed line in FIG. 6, when the corners of the concrete structure 100 are slanted, the end member 3'is also shaped accordingly.

FIG. 7 shows an application example of such an end member 3 '. This example is a case where the connecting portion of a U-shaped water channel bent at 90 ° used for an agricultural water channel or the like is stopped from the inner surface side. Adjust the length of the main body according to the dimensions of the water channel,
For example, on both side surfaces, three main body portions 1 are respectively fixed and joined by three end members 3, and on the bottom surface, four main body portions 1 are connected to each other.
The end members 3 are joined together, and two 9
The end members 3'bent by 0 ° are connected. Then, the water blocking agent is sequentially injected from each end member. If such an end member 3'is used, even if there is a bend in the concrete structure, the waterproof construction can be performed consistently and efficiently.

[0031]

According to the first aspect of the present invention, since the length of the main body is sufficiently long for the width, the combination of one main body with the seal member and the end members at both ends can provide Water can be stopped in a long range at once. In this case, since the fixing portions at both ends in the width direction of the main body and the end members at both ends in the length direction are fixed to the concrete structure, a large number of boxes are connected in series and the four corners of each single box are made into the concrete structure. Compared with, the number of fixing points is reduced and the construction becomes easier. On the other hand, unlike the box, which does not require a lengthwise seal, the necessary sealing effect can be obtained simply by fixing the mounting holes at appropriate pitches on both sides. Since both ends of the main body are fixed by the end members, both ends in the length direction are also firmly fixed.

Further, since the injection of the waterproofing agent and the air bleeding need only be performed once for one main body portion, the construction is greatly simplified and the time is shortened as compared with the box construction method.
Further, since the water blocking agent linearly enters the water blocking surface, it is not necessary to radially spread the water blocking agent as in the V-cut construction method, and the injection pressure of the water blocking agent can be reduced. Furthermore, when the unit length is stopped, the number of parts is reduced, the cost of the equipment itself is reduced, and the indirect construction cost such as parts management is also reduced.

The main body portion is long for its width, has a dish cross section, and since there is an end member, it is not necessary to provide a waterproofing agent supply portion or the like on the main body portion itself, so that the box construction method is used. Since it is not necessary to increase the thickness like
Since the section modulus does not become so large in either direction,
Even if the surface of the concrete structure to be stopped is not flat,
The main body is deformed and runs along the concrete surface, and the waterproofing agent seals well. On the other hand, due to the expansion of the dish cross section and the thickness of the seal member, the space required as the waterproofing agent storing and feeding section is secured. Further, since the main body can be manufactured only by simple bending work and drilling work, it can be processed in the field, and its manufacture is extremely easy and the manufacturing cost is low.

As described above, in the first aspect of the invention, the waterproofing device for the concrete structure is provided on both ends of the main body portion, the seal member, and the main body portion which are long enough for the width in the dish cross section. By skillfully combining the end members that are used,
By these synergistic effects, it is possible to prevent the leakage of the waterproofing agent, facilitate the construction that does not require skill and increase the efficiency, and further reduce the waterproofing apparatus itself and the construction cost.

In the invention of claim 2, in addition to the above, since the seal member is extended to a part of the intermediate portion of the main body, when the pressure of the waterproofing agent is applied to the inside, the seal member has a dish cross section. It is supported almost uniformly in the lengthwise direction on the sloped surface and the surface of the concrete structure, and is compressed to produce a large sealing effect.

According to the third aspect of the present invention, the portion communicating with the outside of the conduction hole is made thicker than the other portions, so that the connecting member of the waterproof agent supply device can be attached to this portion more reliably. Further, the end of the main body in the length direction can be stopped.

According to the invention of claim 4, when the main body is attached at a predetermined angle due to the shape of the water blocking portion of the concrete structure, the end member can be bent at that angle. Even if there are corners in the structure, consistent water stop work can be done, and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 shows an example of a main body portion and a sealing member of a waterproofing device for a concrete structure, (a) is a front view and (b) is a plan view.

2A and 2B show an example of an end member of the waterproof device, FIG. 2A is a perspective view, FIG. 2B is a side view, FIG. 2C is a front view, and FIG.

FIG. 3 is a perspective view showing a state of an external force moment applied to the main body.

FIG. 4 is an explanatory view of the action of the packing.

5 (a) to 5 (c) show examples of application of a waterproof device for waterproofing work, (a) and (b) are plan views, and (c) is a sectional view.

FIG. 6 is a cross-sectional view showing another example of the end member.

FIG. 7 shows another application example of the waterproof device in the waterproof work, (a) is a front view of the water channel, and (b) is a sectional view taken along line bb of (a).

FIG. 8 is a perspective view of a conventional waterproof device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Packing 3 End member 11 Fixed part 11a Main body mounting hole 12 Intermediate part 13 Both ends 13a Coupling hole 31 Combined hole 32 End member mounting hole 33 Conducting hole

Claims (4)

[Claims] 1. A main body having a dish-shaped cross section and a length long enough for its width, a seal member provided on the main body, and end members provided on both end sides of the main body. The main body is provided with a main body attachment hole for attaching to a concrete structure, and flat fixing portions formed on both end sides in the width direction, and the fixing portion on the side opposite to the side attached to the concrete structure. From the intermediate portion formed continuously in a convex shape, and both end portions in the longitudinal direction in which a coupling hole for coupling with the end member is provided, and the sealing member has both widthwise ends. Side is extended to at least the front side of both ends in the lengthwise direction, the end member is mounted between both ends of the main body portion and the concrete structure, and is joined to the joint hole facing the joint hole. Mounting on holes and concrete structures A waterproofing device for a concrete structure, comprising: an end member mounting hole for being struck and a conduction hole that conducts from the inside of the intermediate portion to the outside. 2. The waterproofing device for a concrete structure according to claim 1, wherein the seal member extends from the both end sides to a part of the intermediate portion in the width direction. 3. The waterproofing device for a concrete structure according to claim 1, wherein a portion of the end member communicating with the outside of the conduction hole is thicker than other portions. 4. The end member is interposed between one of the main body and the other of the main body arranged at a predetermined angle in the lengthwise direction, and is bent at the predetermined angle, and both ends of the bent portion. The water stop implement for a concrete structure according to claim 1, wherein the end member mounting hole and the conduction hole are provided on a side.