JP2006002558A - Concrete water-leakage preventive member and concrete water-leakage preventive construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete water-leakage preventive member and a concrete water-leakage preventive construction method reducing a working cost by lightening a force in the direction slipped off from a skeleton by an expansive power by a freezing while shortening the application workhours of a reinforcing adhesive. <P>SOLUTION: A concrete-leakage preventive member 10 is mounted to two-stage ditches 46 formed to the concrete skeleton 30. The concrete-leakage preventive member 10 is composed of fillers 12 and a reinforcing cover material 14 consisting of a surface member 16 fixed to the fillers 12 and an end-section member 18 integrally formed to the surface member 16. The fillers 12 are brought into contact with a wall surface 36 for a contact, the end-section member 18 is entered into an entrance ditch 48, and the entrance ditch 48 is buried with the reinforcing adhesive 28, thus fixing the concrete-leakage preventive member 10 to the concrete skeleton 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a concrete water leakage prevention member and a concrete water leakage prevention method for preventing water leakage from cracks in concrete and defective locations in joints.

  In concrete that forms the outer wall of a tunnel or the like, cracks or defective joints are generated. Water leaks or water freezes from such cracks or joints with poor joints, and concrete breaks down from these places. For this reason, Patent Document 1 proposes a construction method for preventing breakage due to water leakage or the like from a cracked portion of concrete or a jointed joint.

  The construction method of Patent Document 1 will be described with reference to FIGS. As shown in FIG. 10, in order to communicate with a cracked part or a joint joint defect part 31 in the concrete frame 30, a cut groove 32 wider than the crack part or joint joint defective part 31 is formed, for example, in the vertical direction. Form. A wall surface for contact 36 having a predetermined depth d is formed in the opening of the cut groove 32 in a direction perpendicular to the outer surface 34 of the concrete housing 30. A long filler 38 made of a foamed rubber, a synthetic resin foam or the like that is water-tight and stretchable is inserted into the wall surface 36 for contact. The filling material 38 has a quadrangular cross section, the lateral width A of the filling material 38 is set larger than the interval a between the left and right contact wall surfaces 36, and the depth D is set smaller than the depth d of the contact wall surface 36. The filler 38 is inserted into the opening of the cut groove 32 while the left and right sides of the filler 38 are pressed and compressed. At this time, an adhesive is attached to a contact position between the filler 38 and the contact wall surface 36.

  In a state where the filler 38 is attached to the opening of the cut groove 32 (FIG. 11), the cut groove 32 at the back of the position of the filler 38 becomes a water guide groove 40 closed by the filler 38. The filler 38 is fixed to the contact wall surface 36 by the repulsive force against the compression of the filler 38 and the adhesive force of the adhesive, and the adhesive is interposed on the contact surface between the contact wall surface 36 and the filler 38. There is no leakage from the contact surface. Water leaking from cracks and joints where the joints are defective reaches the water guide groove 40, and the water is guided downward through the water guide groove 40 to be drained.

  In the construction method of Patent Document 1, a cut groove 32 is formed at a position where a crack occurs in a concrete frame 30 or a defective portion 31 of a joint joint, and a filler 38 is applied to the opening of the cut groove 32 via an adhesive. By attaching the water, the water leaking from the cracked part or the joint part 31 where the joint is defective is discharged from the water guide groove 40, and the water passes from the contact surface between the filler 38 and the contact wall surface 36 to the outer surface 34 of the concrete frame 30. To prevent leakage. Further, even if the water guided to the water guide groove 40 freezes and expands, the filler 38 is made of expandable rubber foam or the like, so that the filler 38 can expand and cope with it.

Patent No. 1119105

  In the water leakage prevention construction method shown in FIG. 11, when the water led to the water guide groove 40 is frozen and an excessively large back pressure is applied to the filler 38, the large back pressure causes the filler 38 to be applied to the concrete frame 30. Thus, the inability to maintain a stable state occurred and the filler 38 was detached from the concrete housing 30.

  In order to solve the problems of the water leakage prevention method, an improved water leakage prevention method and an improved filler have been proposed. The improved water leakage prevention method and the improved filler will be described with reference to FIGS. 12 to 14, the same reference numerals as those in FIGS. 10 and 11 denote the same members. As shown in FIGS. 12 and 13, the filler 42 is a long material made of a water-tight stretchable foam rubber or the like, like the filler 38. The filler 38 has a quadrangular cross section, whereas the cross section of the filler 42 is formed by forming a protruding portion 44 protruding outward on one surface of the quadrilateral. The protrusion 44 is formed in the entire area of the filler 42 in the longitudinal direction. The horizontal width of the left and right sides of the filler 42 is the same as the horizontal width A as in the filler 38 of FIG.

  The cut groove 46 formed in the concrete housing 30 is a two-step groove. The two-stage groove 46 is set so that the groove width of the inlet groove 48 on the opening side is relatively wide and the groove width on the back side of the inlet groove 48 is relatively narrow. The groove width of the inlet groove 48 is wider than the lateral width A on the left and right of the filler 42. The relatively narrow groove width on the back side is a between the left and right contact wall surfaces 36 with which the filler 42 contacts, and the width a between the contact wall surfaces 36 is the left and right lateral width of the filler material 42. Narrower than A.

  When the filler 42 is attached to the concrete housing 30, the left and right sides of the filler 42 are compressed with the protrusions 44 on the outside, and the filler 42 is inserted between the left and right contact wall surfaces 36. At this time, an adhesive is attached to the contact surface between the filler 42 and the left and right contact wall surfaces 36. In a state where the filler 42 is bonded to the left and right contact wall surfaces 36 (FIG. 14), the tip surface 50 of the projection 44 is set to the same surface position as the outer surface 34 of the concrete housing 30. In a state where the filler 42 is adhered to the left and right contact wall surfaces 36 with an adhesive, the depth of the cut groove 46 is a closed water guide groove 52. After the filler 42 is bonded to the left and right contact wall surfaces 36 with an adhesive, a reinforcing adhesive 54 is packed in the inlet groove 48 (on both sides of the protrusions 44 of the filler 42). The outer surface of the reinforcing adhesive 54 is set to the same surface position as the tip surface 50 of the protrusion 44 and the outer surface 34 of the concrete housing 30.

  In the state shown in FIG. 14, since the concrete housing 30 and the filler 42 are bonded and fixed by the reinforcing adhesive 54 that is not present (FIG. 11), the concrete housing 30 and the filler 42 are fixed in the conventional state. Compared to this, it can be greatly strengthened. Therefore, even if the water in the water guide groove 52 is frozen and a large back pressure is applied to the filler 42, it is possible to prevent the filler 42 from being detached from the concrete housing 30. Further, since the outer side of the joint fixing portion between the filler 42 and the contact wall surface 36 is covered with the reinforcing adhesive 54, the occurrence of water leakage from the joint surface between the concrete housing 30 and the filler 42 can be prevented. .

  In the state of FIG. 14, in the filler 42, only the front end surface 50 of the projection 44 is exposed on the outer surface, but the lateral width C of the front end surface 50 of the projection 44 is exposed on the outer surface in FIG. Compared with the lateral width A of the filler 38, the lateral width is narrow. For this reason, when the water in the water guide groove 52 freezes, the surface area where the filler 42 can swell is reduced, and there is a possibility that a strong force is applied to the filler 42 in the direction away from the concrete housing 30. Further, there is a problem in that it is impossible to recognize whether or not icing has occurred in the water guide groove 52 from the tip surface 50 of the narrow protrusion 44.

  As shown in FIG. 14, in this construction method, in order to fix the filler 42 and the concrete housing 30, the reinforcing adhesive 54 is buried in the inlet groove 48 (the space on both sides of the protrusions 44 in the filler 42). The work of filling the reinforcing adhesive 54 in the entrance groove 48 is the same as the work of painting the wall, and the work of painting the outer surface neatly must be performed. Since the outer surface of the reinforcing adhesive 54 is wide, it takes time to cleanly apply the surface of the reinforcing adhesive 54, and there is a disadvantage that the operation cost is increased.

  The length in the longitudinal direction of the filler 42 is, for example, about 2 m, and the end faces 56 (see FIG. 13) of the filler 42 are bonded to each other with an adhesive. However, since the reinforcing adhesive 54 does not exist outside the protruding portion 44 at the connection portion between the end surfaces 56, when water in the water guide groove 52 freezes and back pressure is applied to the connection portion between the end surfaces 56, The force which peels an adhesive agent was applied to the adhesion location of the end surfaces 56, and there existed a possibility that water leakage might generate | occur | produce from the adhesion location of the end surfaces 56 of the filler 42. FIG.

  The present invention has been made in view of the above points, so as to reduce the force in the direction away from the concrete frame due to the expansion force due to freezing, and to reduce the work cost by shortening the application time of the reinforcing adhesive An object of the present invention is to provide a concrete water leakage prevention member and a concrete water leakage prevention method. Another object of the present invention is to prevent leakage of water from the bonding location between the end faces of the filler.

  The concrete leakage preventing member according to the present invention is attached to a two-stage groove having a relatively wide groove width on the opening side formed in the concrete frame and a relatively narrow groove width on the back side. When it is attached to the inner wall, it contacts the inner walls, and has a stretchable and water-impervious filler, and the outer side of the filler when fixed to the filler and attached to the two-stage groove. A surface member located on the both sides of the surface member, and an end member located in the groove on the opening side when attached to the two-step groove. And a reinforcing cover material having flexibility and water shielding. In the present invention, an extension portion extending outward from the end face of the filler is formed at one end of the reinforcing cover material.

  Another concrete water leakage prevention member according to the present invention is made of a flexible and water-proof material, and is formed on the surface member for covering the water guide groove formed in the concrete frame and on both sides of the surface member. And an end member which is housed in a mounting groove formed in the concrete frame and is fixed to the concrete frame with a reinforcing adhesive.

  In the concrete water leakage prevention method according to the present invention, a two-step groove having a relatively wide groove width on the opening side and a relatively narrow groove width on the back side is formed in the concrete frame, and the surface member is formed on both sides of the surface member. A concrete water leakage prevention member in which a reinforcing cover material having flexibility and water-proofing, which is formed of an end member formed integrally, is fixed to a filler having elasticity and water-proofing, with the filler side as the head, the two steps. Insert toward the groove, bring the filler side into contact with both walls of the groove on the back side, position the end member in the groove on the opening side, and reinforce bonding in the groove on the opening side The end member is fixed to the concrete frame by filling the agent with the reinforcing adhesive. According to the present invention, in the water leakage prevention member, an extension portion extending outward from the end face of the filler is formed at one end of the reinforcing cover material, and the water leakage prevention member on one side is joined when the water leakage prevention members are joined to each other. The extending portion is superposed on the reinforcing cover material on the opposite side of the extending portion of the other water leakage preventing member.

  According to another concrete water leakage prevention method of the present invention, a mounting groove is formed on both sides of the water guiding groove at a position away from the water guiding groove formed in the concrete frame, and the surface member is integrally formed on both sides of the surface member. The water guide groove is covered with the surface member of the flexible and water-tight concrete water leakage preventing member composed of the end member, and the end member is inserted into the mounting groove, and is inserted into the cut groove. A reinforcing adhesive is buried and the end member is fixed to the concrete frame with the reinforcing adhesive.

  In the concrete water leakage prevention member of Example 1, since the flexible reinforcing cover material is provided on the outer side of the filler, even if a large back pressure is applied to the filler due to freezing in the water guide groove, the swelling of the filler Is received by the surface member of the reinforcing cover material, and the surface member swells. As a result, the concrete water leakage prevention member can absorb pressure and avoid peeling and breakage of the concrete frame. In addition, since the position outside the contact surface between the filler and the concrete frame is covered with the reinforcing adhesive, even if the adhesive surface is peeled off, the occurrence of water leakage from the bonded portion should be prevented with the reinforcing adhesive. Can do.

  In the concrete water leakage preventing member of Example 2, even when freezing occurs in the water guide groove and a large back pressure is applied to the surface member, the surface member absorbs the swelling due to freezing. Thereby, peeling and breakage of the concrete frame can be avoided. In addition, the concrete water leakage prevention member does not include a filler, so that the product price is reduced. Furthermore, since the lateral length of the surface member can be shortened, the amount of material used can be reduced, and the product cost can be further reduced.

  In the concrete water leakage prevention method of the first embodiment, the filler is inserted into the back side of the two-step groove, and the end members at both ends of the reinforcing cover member fixed to the filler are positioned inside the inlet groove. Thereafter, the work of filling the reinforcing adhesive in the inlet groove is sufficient. Since the width for filling the reinforcing adhesive is narrow, the time for attaching the reinforcing adhesive can be shortened, and the operating cost can be reduced. In the present invention, at the location where the end surfaces of the concrete water leakage prevention member are bonded to each other, the extension portion of the reinforcing cover provided on the lower concrete water leakage prevention member is extended beyond the bonding location between the end surfaces to reinforce the upper concrete water leakage prevention member. Glue it on top of the cover. Thereby, even if peeling occurs at the bonding location between the end surfaces of the concrete water leakage preventing member, the leakage due to peeling of the bonding location between the end surfaces can be prevented by the extending portion of the reinforcing cover.

  In the concrete water leakage prevention method according to the second embodiment, since the water guide groove and the mounting groove formed in the concrete frame are narrow and do not require strict dimensions in width, the mounting groove can be easily formed. It is. By inserting the end members on both sides of the concrete water leakage prevention member into the mounting groove and filling the mounting groove with the reinforcing adhesive in that state, the concrete water leakage prevention member can be fixed to the concrete frame. Fixing to the frame is easy.

  The present invention is to reduce the force in the direction in which the concrete water leakage prevention member is detached from the housing by the expansion force due to freezing, and to shorten the work time for installing the concrete water leakage prevention member to reduce the work cost.

Next, Embodiment 1 of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a state before a concrete water leakage preventing member according to the present invention is fixed to a concrete frame, and FIG. 2 is a perspective view showing the state of FIG. In the first embodiment of the present invention, the same reference numerals as those in FIGS. 12 to 14 denote the same members. The concrete water leakage prevention member 10 according to the first embodiment of the present invention is, for example, a long object of about 2 m, and is made of a filler 12 made of a water-impervious stretchable foam rubber or synthetic resin foam, and the filling thereof. It consists of a reinforcing cover material 14 made of a special resin elastomer or the like that is water-tight, flexible (flexible), flame retardant, and cold resistant and fixed to the material 12 with an adhesive or the like. The cross section of the filler 12 has, for example, a rectangular cross section. The reinforcing cover member 14 includes a surface member 16 fixed to one surface 12 a of the filler 12 with an adhesive or the like, and end members 18 on both sides formed integrally with the surface member 16.

  The end member 18 is set so as not to protrude outward from the outer surface of the surface member 16. For example, the end member 18 extends in a direction perpendicular to the surface member 16 (extends along the side surface 12 b of the filler 12). 20 and a first arm portion 22a and a second arm portion 22b extending in a direction substantially perpendicular to the support column portion 20 (extending in a direction away from the side surface 12b of the filler 12). The first arm portion 22a is provided at a position closer to the surface member 16 with respect to the second arm portion 22b, and the second arm portion 22b extends longer than the first arm portion 22a. Although two arm portions 22a and 22b are provided in the direction substantially parallel to the surface member 16 from the support column portion 20, the direction is not parallel and may be oblique, and the number of arm portions is one or three or more. It may be. When the number of arm portions is plural, it is desirable to shorten the arm portion length as it is closer to the surface member 16.

  As shown in FIG. 3, the concrete water leakage preventing member 10 has the end of the reinforcing cover member 14 at the same end as the end face 24 of the filler 12 at one end in the longitudinal direction, but at the other end in the longitudinal direction. The reinforcing cover member 14 has an extended portion 26 that extends longer outward than the end face 25 of the filler 12.

  When using the concrete water leakage preventing member 10 according to the first embodiment of the present invention, the cut groove formed in the concrete housing 30 is the same two-stage cut groove (two-step groove) 46 as shown in FIGS. . The two-stage cut groove 46 includes an inlet groove 48 having a relatively wide groove width on the opening side and a deeper groove having a groove width narrower than the inlet groove 48. Contact wall surfaces 36 are formed on the left and right sides of the rear groove, the groove width of the left and right contact wall surfaces 36 is a, and the groove width a is narrower than the lateral width A of the left and right side surfaces 12 b of the filler 12. To do.

  Next, the case where the concrete water leakage preventing member 10 is attached to the cut groove 46 formed in the concrete housing 30 will be described. As shown in FIG. 1 and FIG. 2, the filler 12 is cut into the groove 12 in a state where the left and right side surfaces 12 b of the filler 12 are compressed with the reinforcing cover member 14 facing outward and the filler 12 facing the cut groove 46. 46 are inserted between the left and right contact wall surfaces 36. At this time, an adhesive is attached to the contact surface between the left and right side surfaces 12 b of the filler 12 and the left and right contact wall surfaces 36. In a state where the side surface 12 b of the filler 12 is bonded to the left and right contact wall surfaces 36 (FIG. 4), the surface member 16 of the reinforcing cover member 14 is positioned substantially close to the outer surface 34 of the concrete housing 30. In a state where the side surface 12 b of the filler 12 is bonded to the left and right contact wall surfaces 36, the left and right end members 18 are positioned inside the inlet groove 48. That is, the first arm portion 22 a and the second arm portion 22 b protrude into the inner space of the inlet groove 48.

Thereafter, the reinforcing adhesive 28 is filled in the inlet groove 48 where the end member 18 is located. The outer surface of the reinforcing adhesive 28 is set to be substantially the same surface position as the surface member 16 of the reinforcing cover member 14 and the outer surface 34 of the concrete housing 30. In a state where the reinforcing adhesive 28 is buried in the inlet groove 48, the concrete housing 30 and the concrete water leakage preventing member 10 (side surface 12 b of the filler 12) are bonded and fixed by the reinforcing adhesive 28. Furthermore, since the end member 18 including the first arm portion 22a and the second arm portion 22b is embedded in the reinforcing adhesive 28, the surface member 16 formed integrally with the end member 18 has a reinforcing adhesive on both sides. By 28, it will be in the state fixed to the concrete frame 30. In a state where the concrete water leakage preventing member 10 is attached to the cut groove 46 formed in the concrete housing 30 (FIG. 4), the cut groove 46 at the back of the position of the filler 12 becomes a water guide groove 52 closed by the filler 12. .

  In the concrete water leakage preventing member 10 according to the present invention, even if the water in the water guide groove 52 is frozen and a large back pressure is applied to the filler 12, the swelling of the filler 12 remains as it is in the surface member 16 of the reinforcing cover member 14. The surface member 16 swells over the entire area. Thereby, the pressure of the back pressure (blocking pressure) due to freezing can be reduced by the concrete water leakage preventing member 10, and peeling and breakage of the concrete housing 30 can be avoided. In the concrete water leakage preventing member 10 according to the present invention, the surface member 16 swells when the inside of the introduction groove 52 is frozen or closed, but the degree of swelling of the surface member 16 can be visually confirmed from the outside. As a result, in cases other than freezing, when the introduction groove 52 is clogged with free lime or the like, a place where the introduction groove 52 is clogged by hitting the surface of the concrete water leakage prevention member 10 with a mallet or the like The free lime or the like can be removed, or the introduction groove 52 can be cleaned in some cases.

  The concrete water leakage preventing member 10 according to the present invention covers the outer side of the contact surface between the left and right side surfaces 12b of the filler 12 and the left and right contact wall surfaces 36 with the reinforcing adhesive 28. Even when the adhesive surface is peeled off, it is possible to prevent the occurrence of water leakage from the bonded portion peeled off by the reinforcing adhesive 28. In the present invention, since only the end members 18 at both ends of the surface member 16 need be placed inside the inlet groove 48, the width of the inlet groove 48 that fills the reinforcing adhesive 28 can be reduced. As a result, it is possible to shorten the work time of the reinforcing adhesive 28 whose outer surface must be applied cleanly, and to reduce the work cost.

  Next, the waterproofing method of the joining location of the end surfaces of the concrete water leakage preventing member 10 will be described. As shown in FIG. 5, the end surface 24 of the filler 12 of the concrete water leakage preventing member 10 on one side (the same surface position as the reinforcing cover material 14) and the end surface 25 of the filler 12 of the concrete water leakage preventing member 10 on the other side ( The reinforcing cover member 14 has an extended portion 26 extending outward from the position of the end face 25). At that time, the end surface 24 is positioned upward and the end surface 25 is positioned downward, and the end surface 24 and the end surface 25 are bonded with an adhesive. Furthermore, the extending portion 26 of the reinforcing cover member 14 of the concrete water leakage preventing member 10 positioned on the lower side is arranged to extend upward, and the extending portion 26 of the reinforcing water cover member 14 of the concrete water leakage preventing member 10 positioned on the upper side is arranged. At the same time, the overlapping joints are bonded with an adhesive.

  Contributing to the prevention of peeling of the joint surfaces of the concrete water leakage prevention members 10 by overlapping the extension portions 26 of one concrete water leakage prevention member 10 on the reinforcing cover material 14 of the other concrete water leakage prevention member 10 and bonding them. To do. Furthermore, since the extension part 26 is bonded onto the reinforcing cover material 14 of the other concrete water leakage prevention member 10 with the tip of the extension part 26 facing upward, the bonding location between the end face 24 and the end face 25 is reduced. Even if it should peel off, generation | occurrence | production of water leakage can be prevented by the adhesion location by the expansion | extension part 26. FIG.

Next, a second embodiment of the present invention will be described with reference to the drawings.
FIG. 6 is a cross-sectional view showing a state before another concrete water leakage preventing member according to the present invention is fixed to a concrete frame, and FIG. 7 is a perspective view showing the state of FIG. In the second embodiment, the same reference numerals as those in FIGS. The concrete water leakage preventing member 60 in the invention of Example 2 is obtained by removing the filler 12 made of foamed rubber, synthetic resin foam or the like from the concrete water leakage preventing member 10 shown in Example 1. That is, the concrete water leakage preventing member 60 is made of the reinforcing cover material 14 made of a special resin elastomer or the like that has water barrier properties, flexibility (softness), flame retardancy, and cold resistance and is resistant to tension. The reinforcing cover member 14 includes a surface member 16 for covering the water guide groove 62 formed by cutting from the defective portion 31 of the concrete housing 30, and end members 18 on both sides formed integrally with the surface member 16. .

  The end member 18 is embedded in the concrete housing 30 when the concrete water leakage preventing member 60 is attached to the concrete housing 30, and projects outward from the outer surface of the surface member 16 when fixed to the concrete housing 30. It is set not to do so. The end member 18 includes a support column 20 that extends in a direction perpendicular to the surface member 16, and a first arm portion 22 a and a second arm portion 22 b that extend in a direction substantially perpendicular to the support column 20. The number of arms may be one or three or more.

  Next, the case where the concrete water leakage preventing member 60 of Example 2 is used will be described. When the concrete water leakage preventing member 60 is used, the mounting groove 64 is of a size that can sufficiently accommodate the end member 18 at a position not connected to the water guide groove 40 on the surface of the concrete housing 30 and on both sides in the vicinity thereof. Form. When using the concrete water leakage preventing member 10 of the first embodiment, the cut groove 46 and the inlet groove 48 formed in the concrete frame 30 communicate with the water guide groove 52 (which communicates with the defective portion 31). In the concrete water leakage prevention member 60 of Example 2, the mounting groove 64 formed in the concrete housing 30 is not in communication with the water guiding groove 62 (which communicates with the defective portion 31).

When the concrete water leakage prevention member 60 is attached to the concrete housing 30, the end members 18 on both sides of the reinforcing cover member 14 are put into attachment grooves 64 formed in the concrete housing 30 as shown in FIG. 8. Thereafter, the reinforcing adhesive 28 is buried in the mounting groove 64 in which the end member 18 is accommodated. In a state where the reinforcing adhesive 28 is buried in the mounting groove 64, the end member 18 of the concrete water leakage preventing member 60 is bonded and fixed to the concrete housing 30 by the reinforcing adhesive 28. At this time, the column member 20, the first arm portion 22a, and the second arm portion 22b of the end member 18 are buried in the reinforcing adhesive 28 in a state of projecting into the mounting groove 64. The fixed state with 30 becomes strong. In a state where the concrete water leakage preventing member 60 is fixed to the concrete housing 30, the water guide grooves 62 are covered with the surface member 16, and the end members 18 at both ends of the surface member 16 are attached with the reinforcing adhesive 28 to the mounting grooves 64 of the concrete housing 30. Therefore, the water flowing through the water guide groove 62 does not leak to the outside by the reinforcing adhesive 28.

  In the concrete water leakage preventing member 60 of the second embodiment, even if a large amount of water flows in the water guiding groove 62 or the water in the water guiding groove 62 freezes, The back pressure absorbs the pressure in the entire area of the surface member 16 as it is, and the surface member 16 expands outward as shown in FIG. In this manner, the back pressure (blocking pressure) due to freezing is absorbed by the swelling of the surface member 16 that is flexible and strong in tension, so that the concrete housing 30 can be prevented from being peeled off or damaged. In the concrete water leakage preventing member 60 according to the second embodiment, when the inside of the water guide groove 40 is frozen or closed, the surface member 16 swells outward, so that the degree of swelling of the surface member 16 can be confirmed visually. it can. Thereby, cleaning is performed in cases other than freezing, and when the introduction groove 52 is clogged with free lime etc., the free lime etc. is removed by hitting the surface of the concrete water leakage preventing member 60 with a mallet, In some cases, the introduction groove 40 can be cleaned. Further, since the width of the mounting groove 64 is narrow, it is possible to shorten the working time of the reinforcing adhesive 28 that requires the outer surface to be applied cleanly, and to reduce the working cost.

  The concrete water leakage preventing member 60 of Example 2 is obtained by eliminating the filler 12 from the concrete water leakage preventing member 10 shown in Example 1. For this reason, the concrete water leakage prevention member 60 of Example 2 can be adapted to the location of the water guide groove that does not necessarily require the filler 12, and the product price is very cheap compared to the concrete water leakage prevention member 10 of Example 1. Become. Further, when the concrete water leakage preventing member 10 of Example 1 is used, the concrete housing 30 has to be formed with the slits 46 of the wall surface for contact 36 having a strict spacing a with a large depth and a wide width. When the concrete water leakage preventing member 60 of Example 2 is used, since the water guide groove 62 and the mounting groove 64 formed in the concrete housing 30 may be shallow and narrow in width, the formation work of the grooves 62 and 64 is not necessary. It is simpler than the cut groove 46.

  Further, in the concrete water leakage preventing member 10 of the first embodiment, the wide cut groove 46 for fitting the filler 12 has to be formed, but when the concrete water leakage preventing member 60 of the second embodiment is used. Since the width of the water guide groove 62 does not need to be increased, the lateral length B (FIG. 6) of the surface member 16 is set to the lateral length A (FIG. 1) of the surface member 16 of the concrete water leakage preventing member 10. ) Can be shorter. As a result, the product price of the concrete water leakage preventing member 60 can be further reduced compared to the concrete water leakage preventing member 10.

It is sectional drawing which shows the state before fixing the concrete water leakage prevention member of Example 1 which concerns on this invention to a concrete frame. It is a perspective view which shows the state of FIG. It is sectional drawing of the front-end | tip part of the concrete water leakage prevention member shown in FIG. It is sectional drawing which shows the state which attached the concrete leak prevention member to the concrete frame from the state of FIG. It is sectional drawing which shows the state which joined the concrete water leakage prevention member shown in FIG. It is sectional drawing which shows the state before fixing the concrete water leakage prevention member of Example 2 which concerns on this invention to a concrete frame. It is a perspective view which shows the state of FIG. It is sectional drawing which shows the state which attached the concrete water leakage prevention member to the concrete frame from the state of FIG. It is sectional drawing which shows the state which the surface member of the concrete water leakage prevention member swelled from the state of FIG. It is sectional drawing which shows the state before fixing a filler to a concrete frame in what shows a conventionally known water leak prevention construction method. It is sectional drawing which shows the state which attached the filler to the concrete frame from the state of FIG. It is sectional drawing which shows the state before fixing a filler to a concrete frame by showing the other known leak prevention construction method. It is a perspective view which shows the state of FIG. It is sectional drawing which shows the state which attached the filler to the concrete frame from the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Concrete water leakage prevention member 12 Filler 14 Reinforcement cover material 16 Surface member 18 End member 20 Support | pillar part 22a 1st arm part 22b 2nd arm part 24 End surface 25 End surface 26 Elongation part 28 Reinforcement adhesive 30 Concrete frame 36 Contact wall surface 52 Water guide groove 60 Concrete water leakage prevention member 62 Water guide groove 64 Mounting groove

Claims (6)

  It is attached to a two-stage groove having a relatively wide groove width on the opening side formed in the concrete frame and a relatively narrow groove width on the back side. A filler that is in contact with the wall and is stretchable and water-impervious, a surface member that is fixed to the filler and mounted on the two-stage groove, and a surface member positioned outside the filler; It is formed integrally with the surface member on both sides, and is flexible and water-proofing comprising an end member positioned in the groove on the opening side when attached to the two-step groove. A concrete water leakage prevention member comprising a reinforcing cover material.   2. The concrete water leakage preventing member according to claim 1, wherein an extension portion extending outward from an end face of the filler is formed at one end of the reinforcing cover material.   It is made of a flexible and water-proof material, and is formed on the surface member for covering the water guide groove formed on the concrete case and on both sides of the surface member, and is formed on the concrete case. A concrete water leakage preventing member comprising: an end member for being housed in the mounting groove.   A two-step groove having a relatively wide groove width on the opening side and a relatively narrow groove width on the back side is formed in the concrete frame, and from the surface member and the end member integrally formed on both sides of the surface member Inserting a concrete water leakage prevention member in which a flexible and water-proof reinforcing cover material is fixed to a stretchable and water-proof filler, with the filler side leading to the two-step groove, and the back side The filler material side is brought into contact with both walls of the groove, the end member is positioned in the groove on the opening side, a reinforcing adhesive is buried in the groove on the opening side, and the reinforcing adhesive is used to A concrete water leakage prevention method characterized by fixing an end member to the concrete frame.   In the water leakage prevention member, an extension portion extending outward from the end surface of the filler is formed at one end of the reinforcing cover material, and when the water leakage prevention members are joined to each other, the extension portion of the one side water leakage prevention member is The concrete water leakage prevention method according to claim 4, wherein the concrete water leakage prevention member is superposed on a reinforcing cover material on a side opposite to the extended portion of the side water leakage prevention member.   A mounting groove formed on both sides of the water guiding groove at a position away from the water guiding groove formed in the concrete frame, and a flexible structure comprising a surface member and end members formed integrally on both sides of the surface member; Covering the water guide groove with the surface member of the concrete water leakage preventing member having water impermeability, inserting the end member into the mounting groove, filling the cut groove with a reinforcing adhesive, and using the reinforcing adhesive A concrete water leakage prevention method characterized by fixing an end member to the concrete frame.

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