JP5727863B2 - Water stop member for manhole repair and manhole repair method - Google Patents

Description

  The present invention relates to a water stop member for repairing manholes and a manhole repair method used when repairing a connecting portion between a manhole and a pipe member.

  2. Description of the Related Art Conventionally, a manhole structure used for, for example, a sewer system is configured by connecting a pipe member made of a fume pipe or the like to manholes provided at predetermined intervals. In such a manhole structure, the manhole and the pipe member move differently when an earthquake occurs, and there is a problem that an excessive force is applied to the connection part, resulting in cracks and the sewer function cannot be secured. When a new structure is provided, the manhole and the pipe member are connected using a flexible joint made of rubber, soft plastic, or the like.

  The above construction method can be used for the new manhole structure, but the existing manhole structure requires large-scale work such as removal of earth and sand and refilling of the repaired part, even if it is attempted to repair using a flexible joint. Will be prolonged.

  As a method for solving this problem, a repair method for an existing manhole structure is known. As the repair method, for example, there is a method disclosed in Patent Document 1.

  That is, in the renovation method of Patent Document 1, a rock drill is used to remove the periphery of the pipe member in the manhole wall from the inside of the manhole to form a penetrating portion in the manhole wall, and then the flexible portion is fixed to the penetrating portion. A water member is embedded, and the manhole and the pipe member are connected using a flexible water stop member.

JP 2003-74078 A

  However, depending on the location where the manhole structure is provided, the groundwater level is high, and the groundwater may be present outside the pipe member. When the earth and sand contain groundwater, it becomes easy to flow, and when the earth and sand are easy to flow outside the pipe member, the penetrating part for embedding the flexible water-stopping member by the repair method of Patent Document 1 is used as the wall of the manhole. If formed, the surrounding earth and sand may flow into the manhole through the penetrating part.

  For this reason, it is necessary to investigate the groundwater level outside the manhole in advance. When the water level is high, an operation of injecting a solidifying agent or the like for solidifying the earth and sand is necessary, which causes an increase in construction cost at the time of repair.

  The present invention has been made in view of the above points, and the purpose of the present invention is to make it unnecessary to investigate the water level of groundwater when renovating existing manhole structures to provide earthquake resistance. The aim is to eliminate the work of injecting a solidifying agent or the like even when the groundwater level is high, and to reduce the construction cost at the time of repair.

  In order to achieve the above object, according to the present invention, a water stop member for repairing a manhole is inserted into an annular recess opened inside the manhole, and the repair water stop member is used to prevent relative displacement between the manhole and the pipe member. The aqueous solution was kept.

According to a first aspect of the present invention, there is provided a water stop member for repairing a manhole used for repairing an existing manhole structure including a manhole and a pipe member connected to the manhole, wherein the manhole is made of a material that does not allow water to pass through. An outer periphery-side adhesive portion that is bonded to the outer peripheral side of the annular recess, and an inner periphery of the annular recess. An inner peripheral side adhesive portion that is bonded to the side, and a displacement allowing portion that allows relative displacement of the outer peripheral side adhesive portion and the inner peripheral side adhesive portion, the outer peripheral side adhesive portion and the inner peripheral side adhesive portion, Has adhesiveness with mortar, and is bonded to the outer peripheral side and inner peripheral side of the annular recess by the mortar .

  According to this configuration, when the water stop member for refurbishment is provided in the existing manhole structure, the annular recess may be formed so as to open to the inside of the manhole. It will end. As a result, even if the groundwater level is high, there is no risk of sediment flowing into the manhole, and prior water level surveys and solidifying agent injection work are not required.

  When the pipe member moves relative to the manhole at the time of the earthquake after the repair, the formation portion of the annular recess is weaker than the other portions, so that the crack is generated at the portion corresponding to the annular recess. And since the outer peripheral side adhesion part of the waterproofing member for repair is adhere | attached on the outer peripheral side of an annular recessed part, and the inner peripheral side adhesive part is adhere | attached on the inner peripheral side of an annular recessed part, an outer peripheral side adhesive part and inner peripheral side adhesion | attachment The parts are displaced relative to each other. This relative displacement is allowed by the displacement allowing portion of the waterstop member for repair. Therefore, the water stoppage by the waterstop member for repair is maintained.

In addition, when the mortar is filled with the mortar and the waterproofing member for repair is inserted into the annular recess in this state, the outer peripheral side adhesive portion and the inner peripheral side adhesive portion of the waterproofing member for repair are outer periphery of the annular concave portion by the mortar. Adhere to the side and inner circumference.

  According to a second invention, in the first invention, the outer peripheral side adhesive portion and the inner peripheral side adhesive portion are formed in a plate shape extending in the center line direction of the pipe member and are disposed so as to overlap each other in the thickness direction. The displacement allowing portion is configured to allow sliding between the outer peripheral side adhesive portion and the inner peripheral side adhesive portion.

  According to this structure, since the adhesion area of an outer peripheral side adhesion part and an inner peripheral side adhesion part is fully ensured, water stop performance improves. And the waterproofing member for repair becomes compact by overlapping the outer peripheral side adhesive part and the inner peripheral side adhesive part in the thickness direction. At this time, since the displacement allowance part allows sliding between the outer peripheral side adhesive part and the inner peripheral side adhesive part, it is possible to sufficiently allow the movement when the pipe member moves relative to the manhole in the event of an earthquake. become.

A third invention is a Ma Nhoru in Manhole repair method for use in existing manhole structure comprising a tubular member connected to the manhole, the wall of the manhole, the pipe member is opened to the inside of the manhole of forming an annular recess extending to surround the opening end, it becomes a material impervious to water, and the outer adhesion portion which is bonded by mortar to the outer peripheral side of the annular recess, mortar on the inner peripheral side of the annular recess The water stop member for repair provided with the inner peripheral side adhesive part bonded by the above and a displacement allowable part allowing the relative displacement of the two adhesive parts is inserted into the annular recess, and the outer peripheral side adhesive part is It adheres to the outer peripheral side of an annular recessed part, and adhere | attaches the said inner peripheral side adhesion part on the inner peripheral side of the said annular recessed part with mortar .

  According to this configuration, as in the first aspect of the invention, it is not necessary to form a penetrating portion in the wall of the manhole when the water stop member for repair is provided in the existing manhole structure. No injection work is required.

  Further, when an earthquake occurs, a crack is generated at a portion corresponding to the annular recess. At this time, the outer peripheral side adhesive portion and the inner peripheral side adhesive portion are relatively displaced, but since this relative displacement is allowed by the displacement-permitting portion of the repair water-stopping member, the water stoppage by the repair water-stopping member is not allowed. Kept.

According to a fourth aspect of the present invention, in the third aspect of the invention, the pipe member protecting member is placed between the insertion hole of the pipe member formed in the wall of the manhole and the outer peripheral surface of the pipe member inserted into the insertion hole. An annular concave portion is formed in the protective concrete portion of.

  That is, protective concrete is weaker than ordinary manhole walls. Therefore, the annular recess can be easily formed by forming the annular recess in the protective concrete portion.

  According to 1st invention, the outer peripheral side adhesion part adhere | attached on the outer peripheral side of the annular recessed part opened inside a manhole, the inner peripheral side adhesion part adhere | attached on an inner peripheral side, and the relative displacement of these both adhesion parts Therefore, without the formation of a penetrating part in the wall of the manhole, the relative displacement between the manhole and the pipe member can be allowed and the water stoppage can be maintained without forming a penetrating portion in the wall of the manhole. Thereby, even if the groundwater level is high, the preliminary water level survey and the solidifying agent injection work can be made unnecessary, and the construction cost at the time of repair can be reduced.

Moreover, since the outer peripheral side adhesive part and the inner peripheral side adhesive part of the water-stopping member for repair are bonded to the outer peripheral side and the inner peripheral side of the annular recess by mortar, the water can be reliably stopped by simple construction.

According to the second invention, since the outer peripheral side adhesive portion and the inner peripheral side adhesive portion are formed in a plate shape extending in the center line direction of the pipe member and arranged so as to overlap each other in the thickness direction, the water stopping performance is high. The waterproofing member for repair can be made compact. Then, by allowing the sliding between the outer peripheral side adhesive portion and the inner peripheral side adhesive portion, the movement of the pipe member at the time of the occurrence of the earthquake can be sufficiently allowed to maintain the water stoppage .

According to the third invention, it is possible to maintain the water cut in the event of an earthquake provided renovation for water-shutoff member without forming a penetrating portion on the wall of Ma Nhoru. Thereby, even if the groundwater level is high, the preliminary water level survey and the solidifying agent injection work can be made unnecessary, and the construction cost at the time of repair can be reduced.

According to the fourth invention, since the annular recess is formed in the protective concrete portion between the insertion hole of the tube member formed in the wall of the manhole and the outer peripheral surface of the tube member, the annular recess is formed. It can be performed easily and the construction cost can be further reduced.

It is sectional drawing of a manhole structure. It is an expanded longitudinal cross-sectional view of the connection part vicinity of a manhole and a fume pipe | tube. FIG. 3 is a view corresponding to FIG. 2 in a state where an annular recess is formed. FIG. 3 is a view corresponding to FIG. 2 in a state where an annular recess is filled with mortar. FIG. 3 is a view corresponding to FIG. 2 in a state in which a waterproofing member for repair is inserted into an annular recess. It is a cross-sectional view of the state which inserted the water stop member for repair in the annular crevice. It is sectional drawing of the water stop member for repair. It is an expanded sectional view of the state which inserted the water stop member for repair in the annular crevice. It is an expanded sectional view in the state where a crack occurred by an earthquake. FIG. 9 is a view corresponding to FIG. 8 in a state in which the fume tube is displaced in a direction of coming out of the manhole by an earthquake. FIG. 6 is a view corresponding to FIG. 5 according to Modification 1 of the embodiment. FIG. 9 is a view corresponding to FIG. 8 according to Modification 1 of the embodiment. FIG. 6 is a view corresponding to FIG. 5 according to Modification 2 of the embodiment. FIG. 9 is a view corresponding to FIG. 8 according to a second modification of the embodiment. FIG. 7 is a view corresponding to FIG. 6 according to Modification 3 of the embodiment. FIG. 6 is a view corresponding to FIG. 6 according to Modification 4 of the embodiment. FIG. 10 is a view corresponding to FIG. 6 according to Modification 5 of the embodiment. FIG. 7 is a view corresponding to FIG. 6 according to Modification 6 of the embodiment. FIG. 9 is a diagram corresponding to FIG. 6 according to Modification 7 of the embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows an existing manhole structure 1 before being repaired by a manhole repair method according to an embodiment of the present invention. The manhole structure 1 includes a manhole 2 extending in the vertical direction, and a fume tube (tube member) 3 having a circular cross section connected to the manhole 2. The manhole 2 and the fume tube 3 generally have a reinforcing bar at the center in the thickness direction in the peripheral wall.

  The manhole 2 is a so-called assembly manhole constructed by connecting a plurality of cylindrical wall members 10, 10,. On the inner surface of the cylindrical wall member 10, a plurality of steps 10a are provided at intervals in the vertical direction. A reinforcing bar is provided in the peripheral wall of the cylindrical wall member 10.

  An adjustment ring 11 is provided at the upper end of the cylindrical wall member 10 at the top of the manhole 2. A lid 12 and a receiving frame 13 that receives the lid 12 are provided on the adjustment ring 11. On the other hand, a bottom plate 15 is provided below the manhole 2. Further, an invert 16 is provided at the bottom of the manhole 2.

  As shown also in FIG. 2, a substantially circular through hole 10 b into which the end of the fume tube 3 is inserted is formed in the cylindrical wall member 10 at the lower part of the manhole 2.

  The size of the through hole 10b is set to such a size that a predetermined gap is formed between the outer surface of the fume tube 3 and the fume tube 3 is provided with a fume between the through hole 10b and the outer surface of the fume tube 3. A protective concrete 18 for protecting the pipe 3 is filled over the entire circumference, and water is stopped by a part of the protective concrete 18.

  The protective concrete 18 is provided from between the through hole 10b and the outer peripheral surface of the fume tube 3 to the outside of the manhole 2, and a concentrated load due to earth pressure or the like is applied to the manhole connection portion of the fume tube 3 so that the fume tube 3 is protected. This is to prevent the damage.

  The manhole renovation method according to the present invention is used for the existing manhole structure 1 configured as described above, and when the manhole 2 and the fume pipe 3 move differently in the event of an earthquake. It is performed for the purpose of securing water-stopping.

  The manhole renovation method roughly comprises the following three steps. The first step is an annular recess forming step for forming the annular recess 30 shown in FIG. 3, and the two steps are mortar filling steps for filling the annular recess 30 shown in FIG. 4 with a mortar 31. The process is a water stop member insertion step of inserting the water stop member 40 for repair into the annular recess 30 filled with the mortar 31 shown in FIG.

  As shown in FIG. 3, the annular recess 30 is formed around the through hole 10 b in the cylindrical wall member 10 so as to open inside the manhole 2. The annular recess 30 extends so as to draw a circle substantially concentric with the end opening of the fume tube 3, and is continuous in the circumferential direction of the end opening of the fume tube 3. An outer peripheral side surface (outer peripheral surface 30 a) of the annular recess 30 extends in the center line direction of the fume tube 3. The side surface (inner peripheral surface 30b) on the inner peripheral side of the annular recess 30 also extends in the center line direction of the fume tube 3, and the outer peripheral surface 30a and the inner peripheral surface 30b are substantially parallel. The width of the annular recess 30, that is, the interval between the outer peripheral surface 30 a and the inner peripheral surface 30 b is set to be wider than the thickness dimension of the water-stopping member 40 for repair described later.

  The bottom surface 30 c of the annular recess 30 extends in a direction perpendicular to the center line of the fume tube 3. As shown also in FIG. 6, the depth of the annular recess 30 is set to a depth at which the entire repair waterproofing member 40 can be completely inserted. The depth of the annular recess 30 is preferably deeper than the center of the cylindrical wall member 10 in the thickness direction so as to reach the outer surface side of the wall member 10.

  Further, the mortar filled in the annular recess 30 in the mortar filling step shown in FIG. 4 is a general mortar conventionally used in construction sites such as manholes, such as quick setting mortar having water tightness, non-shrinking mortar, etc. It is.

  Next, the structure of the waterproofing member 40 for repair is demonstrated. The waterproofing member 40 for repair is formed in an annular shape corresponding to the annular recess 30 as a whole, and as shown in FIG. 7, an outer peripheral side adhesive portion 41 bonded to the outer peripheral surface 30 a of the annular recess 30, For bonding the inner peripheral side adhesive portion 42 bonded to the inner peripheral surface 30b of the annular recess 30, the connecting portion 43 connecting them, the film 44, and the outer peripheral side and inner peripheral side adhesive portions 41, 42, respectively. The outer peripheral side and inner peripheral side adhesives 45 and 46 are provided.

  The outer peripheral side adhesive portion 41, the inner peripheral side adhesive portion 42, and the connecting portion 43 are integrally formed using a rubber material that does not allow water to pass through. Examples of the rubber material include butyl rubber (IIR), natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), polybutadiene rubber (BR), styrene-butazine rubber (SBR), chloroprene rubber (CR), Nitrile rubber (NBR), acrylic rubber (ACM, ANM), urethane rubber (U) and the like can be mentioned. Besides these, for example, a thermoplastic polymer may be used.

  The outer peripheral side adhesive portion 41 is formed in a plate shape that extends along the outer peripheral surface 30 a of the annular recess 30. The width of the outer peripheral side adhesive portion 41 (left-right direction in FIG. 7) is set to be shorter than the depth dimension of the annular recess 30.

  The outer peripheral side adhesive material 45 is attached to the outer surface of the outer peripheral side adhesive portion 41. The outer peripheral side adhesive 45 is, for example, a material having improved adhesion to mortar with the formulation disclosed in Japanese Patent Application Laid-Open No. 2007-291802 with respect to the raw material rubber described above. The raw rubber may be composed of a single species, or may be composed of a blend of a plurality of species. As the raw material rubber, butyl rubber (IIR) is preferable among those described above, and regenerated butyl rubber obtained from a tire tube or the like is particularly preferable. The butyl rubber as the raw rubber is preferably non-vulcanized. The outer peripheral side adhesive 45 also has the property of not allowing water to pass through.

  In addition to the above, as the outer peripheral side adhesive material 45, a tape-like material having adhesiveness with mortar such as butyl rubber can be used. However, since the adhesive strength is low, the displacement of the fume tube 3 to be described later It is necessary to consider the load that is sometimes applied.

  The outer peripheral side adhesive material 45 is formed in a plate shape extending along the outer surface of the outer peripheral side adhesive part 41. Thereby, the adhesion area is ensured widely.

  The inner peripheral side adhesive portion 42 is configured in the same manner as the outer peripheral side adhesive portion 41, and the same inner peripheral side adhesive 46 as the outer peripheral side adhesive 45 is attached to the inner peripheral side adhesive portion 42. ing. The inner peripheral side adhesive portion 42 and the outer peripheral side adhesive material 45 are disposed so as to overlap in the thickness direction.

  The connecting portion 43 is formed in a plate shape that curves and extends from one end portion in the width direction of the outer peripheral side adhesive portion 41 to one end portion in the width direction of the inner peripheral side adhesive portion 42. The thickness of the connecting portion 43 is set to be thinner than the thickness of the outer peripheral side adhesive portion 41, and a space portion R surrounded by the connecting portion 43 is formed inside the waterproofing member 40 for repair. In addition, when the connection part 43 is not extended like the case where the displacement of the fume pipe | tube 3 is small (when it is extended even if it is slight), the thickness of the connection part 43 is set to the outer periphery side adhesion part 41 or the inner periphery side adhesion part. 42, the space R may not be formed.

  The film 44 is disposed between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42, and one side slides with respect to the other in a state where the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 overlap each other. The outer peripheral side adhesive part 41 and the inner peripheral side adhesive part 42 are made of a member having a lower friction than the rubber material constituting the outer peripheral side adhesive part 41 and the inner peripheral side adhesive part 42, such as a polyethylene film.

  Next, the construction procedure of the manhole repair method will be described. First, as shown in FIG. 3, the annular recess 30 is formed in the cylindrical wall material 10 of the manhole 2. Since the annular recess 30 opens to the inside of the manhole 2 and extends so as to surround the opening end of the fume tube 3, it is not necessary to form a penetrating portion in the wall of the manhole 2 as in the prior art. As a result, even if the groundwater level is high, there is no fear that earth and sand will flow into the manhole 2, and a preliminary water level survey and a solidifying agent injection work are not required.

  Thereafter, the mortar 31 is filled in the annular recess 30 as shown in FIG. Before filling the mortar 31, a primer may be applied to the outer peripheral surface 30a and the inner peripheral surface 30b of the annular recess 30.

  After that, as shown in FIG. 5, the waterproof member 40 for repair is inserted into the annular recess 30. The insertion direction of the waterproofing member 40 for repair at this time is a direction where the connection part 43 becomes the bottom face 30c side of the annular recessed part 30, as shown in FIG. Thus, it is desirable to insert the repair water-stopping member 40 into the mortar 31 from the connecting portion 43 side, so that the mortar 31 can be prevented from entering the repair water-stopping member 40.

  In addition, the depth of insertion of the water-stopping member for repair 40 is set to a depth that allows the entire water-stopping member for repair 40 to be completely inserted into the annular recess 30 and covered with the mortar 31.

  When the mortar 31 is dried, the mortar 31 is fixed to the outer peripheral surface 30a, the inner peripheral surface 30b, and the bottom surface 30c of the annular recess 30. Furthermore, the outer peripheral side adhesive material 45 and the inner peripheral side adhesive material 46 of the water-stopping member 40 for repair adhere to the mortar 31. Thereby, the outer peripheral side adhesive portion 41 of the water-stopping member 40 for repair is bonded to the outer peripheral surface 30a of the annular concave portion 30, and the inner peripheral side adhesive portion 42 is bonded to the inner peripheral surface 30b of the annular concave portion 30.

  Next, a case where an earthquake occurs will be described. When an earthquake occurs and the manhole 2 and the fume pipe 3 move differently, the formation portion of the annular recess 30 in the cylindrical wall material 10 is weaker than other portions due to the formation of the annular recess 30. As shown in FIG. 9, a crack A is generated so as to correspond to the formation site of the annular recess 30. The crack A reaches the bottom surface 30 c of the annular recess 30, but the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 of the waterproofing member 40 for repair are on the outer peripheral surface 30 a side and the inner peripheral surface 30 b side of the annular concave portion 30. Since these two adhesive portions 41 and 42 are connected by the connecting portion 43, the water-stopping property is maintained and water leakage is prevented.

  In addition, as shown in FIG. 10, the movement of the fume tube 3 is large, and the fume tube 3 may be displaced in the direction of coming out of the manhole 2. In this case, since the inner peripheral side adhesive portion 42 of the waterproofing member 40 for repair is bonded to the fume tube 3 side, it is displaced together with the fume tube 3. That is, the inner peripheral side adhesive portion 42 tends to be displaced relative to the outer peripheral side adhesive portion 41 in the removal direction of the fume tube 3. At this time, a film 44 is disposed between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 so that the inner peripheral side adhesive portion 42 can slide with respect to the outer peripheral side adhesive portion 41. Therefore, the inner peripheral side adhesive portion 42 slides, and as a result, relative displacement between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 is allowed. When the inner peripheral side adhesive portion 42 slides, the connecting portion 43 extends.

  Even if the inner peripheral side adhesive portion 42 slides, the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 remain adhered to the outer peripheral surface 30 a and the inner peripheral surface 30 b of the annular recess 30, and the connecting portion 43. Since only stretches, the water-stopping property is maintained and water leakage is prevented.

  As described above, according to this embodiment, the waterproofing member 40 for repair is bonded to the outer peripheral surface 30a of the annular recess 30 opened inside the manhole 2, and the inner peripheral surface 30b. Since the inner peripheral side adhesive part 42 adhered to the film and the film 44 disposed therebetween are provided, the repair water-stopping member 40 is provided without forming a penetrating part on the wall of the manhole 2. Can do. Thereby, even if the groundwater level is high, the preliminary water level survey and the solidifying agent injection work can be made unnecessary, and the construction cost at the time of repair can be reduced.

  And at the time of the occurrence of an earthquake, relative displacement between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 can be allowed by the film 44, so that the water stoppage can be maintained.

  Moreover, since the outer peripheral side adhesive part 41 and the inner peripheral side adhesive part 42 of the waterproofing member 40 for repair were formed in the plate shape extended in the centerline direction of the fume pipe | tube 3, a sufficient adhesion area is ensured and water stop performance Can be increased. And since the outer periphery side adhesion part 41 and the inner periphery side adhesion part 42 were arrange | positioned so that it might mutually overlap in the thickness direction, the waterproofing member 40 for repair can be made compact.

  Further, since the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 of the water-stopping member 40 for repair are bonded to the outer peripheral side and the inner peripheral side of the annular recess 30 by the mortar 31, reliable by simple construction. Water stoppage can be obtained.

  In addition, you may provide the water stop member 40 for repair in the boundary part of the cylindrical wall material 10 and the protective concrete 18, for example like the modification 1 shown in FIG. In this case, the annular recess 30 is formed at the boundary portion between the cylindrical wall material 10 and the protective concrete 18, so the outer peripheral surface 30 a of the annular recess 30 is formed in the cylindrical wall material 10 and the inner peripheral surface 30 b. Will be formed in the protective concrete 18. The bottom surface 30 c of the annular recess 30 is formed from the cylindrical wall material 10 to the protective concrete 18.

  In the first modification, when the manhole 2 and the fume tube 3 move differently when an earthquake occurs, as shown in FIG. 12, a crack A is generated so as to correspond to the formation site of the annular recess 30. Even if the crack A occurs, as described above, the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 of the waterproofing member 40 for repair are bonded to the outer peripheral surface 30a side and the inner peripheral surface 30b side of the annular recess 30. And since these both adhesion parts 41 and 42 are connected by the connection part 43, a water stop is maintained and a water leak is prevented.

  Moreover, you may provide the waterproofing member 40 for repair in the protective concrete 18 which comprises some manholes 2 like the modification 2 shown, for example in FIG. In this case, the annular recess 30 is formed in the protective concrete 18. Since this reinforcing concrete 18 is not provided with reinforcing reinforcing bars as in the cylindrical wall material 10 and the fume tube 3, it is formed on the cylindrical wall material 10 and the fume tube 3 when the annular recess 30 is formed. It becomes possible to form easily compared with the case where it does.

  In the second modification, when the manhole 2 and the fume tube 3 move differently when an earthquake occurs, as shown in FIG. 14, a crack A is generated so as to correspond to the formation site of the annular recess 30. Even if the crack A occurs, as described above, the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 of the waterproofing member 40 for repair are bonded to the outer peripheral surface 30a side and the inner peripheral surface 30b side of the annular recess 30. And since these both adhesion parts 41 and 42 are connected by the connection part 43, a water stop is maintained and a water leak is prevented.

  Further, the structure of the waterproofing member 40 for repair is not limited to the above-described one. For example, a plurality of bent portions 43a, 43a, and 43a are provided in the connecting portion 43 as in Modification 3 shown in FIG. The connecting portion 43 may be folded. As a result, the length when the connecting portion 43 is expanded becomes long, so that even if the fume tube 3 is largely displaced in the direction of coming out of the manhole 2, the connecting portion 43 extends while expanding so as to follow the displacement. Therefore, it is possible to prevent the connecting portion 43 from being broken.

  Moreover, as a structure of the waterproofing member 40 for repair, you may make it connect the outer peripheral side adhesion part 41 and the inner peripheral side adhesion part 42 by the width direction both sides like the modification 4 shown, for example in FIG. . In this modified example 4, the first and second folded portions 41a and 41b are provided on both sides in the width direction of the outer peripheral side adhesive portion 41, and the first and second folded portions are provided on both sides in the width direction of the inner peripheral side adhesive portion 42. Portions 42a and 42b are provided. Then, the first folded portion 41a of the outer peripheral side adhesive portion 41 and the first folded portion 42a of the inner peripheral side adhesive portion 42 are connected, and the second folded portion 41b of the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 are connected. Are connected to the second folded portion 42b. A film 44 is disposed between the first folded portion 41a of the outer circumferential side adhesive portion 41 and the first folded portion 42a of the inner circumferential side bonded portion 42, and similarly between the second folded portion 41b and the second folded portion 42b. Also, a film 44 is arranged. By disposing the films 44, 44, sliding between the first folded portion 41a and the first folded portion 42a is allowed, and sliding between the second folded portion 41b and the second folded portion 42b is allowed. Will be.

  Moreover, as a structure of the waterproofing member 40 for repair, for example, two films 44 and 44 are provided between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 as in Modification 5 shown in FIG. You may arrange | position so that it may overlap. Thereby, the outer periphery side adhesion part 41 and the inner periphery side adhesion part 42 become still easier to slide. In this case, it is also possible to affix one film 44 to the outer peripheral side adhesive part 41 and affix the other film 44 to the inner peripheral side adhesive part 42.

  In addition, as the structure of the waterproofing member 40 for repair, for example, a plurality of bends that bend in the thickness direction between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 as in Modification 6 shown in FIG. .. May be provided. In this modified example 6, when the fume tube 3 is displaced in the direction of coming out of the manhole 2, the bent portions 48, 48,... Are deformed so as to extend, whereby the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 are deformed. Relative displacement is allowed. That is, the bent portion 48 constitutes the displacement allowable portion of the present invention.

  In the above-described embodiment, the film 44 is used as the displacement allowable portion. However, the present invention is not limited to this. For example, instead of the film 44, silicone oil is injected between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42. You may comprise a displacement tolerance part with a silicone oil.

  Further, a powder such as talc may be applied between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42, and the displacement allowable portion of the present invention may be constituted by this powder.

  Further, as the structure of the water-stopping member 40 for repair, for example, a sponge 49 is provided between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42 instead of the film 44 as in Modification 7 shown in FIG. You may arrange. When the fume tube 3 is displaced in the direction of coming out of the through hole 10b of the manhole 2, the sponge 49 is deformed and is torn, thereby allowing relative displacement between the outer peripheral side adhesive portion 41 and the inner peripheral side adhesive portion 42. . That is, the sponge 49 constitutes the displacement allowance part of the present invention.

  Further, the annular recess 30 may be filled with an epoxy resin instead of the mortar 31 and the repair water-stopping member 40 may be bonded using this epoxy resin.

  As described above, the present invention can be applied to, for example, repairing an assembly manhole.

1 Manhole structure 2 Manhole 3 Hume tube (tube member)
DESCRIPTION OF SYMBOLS 10 Cylindrical wall material 18 Protective concrete 30 Tubular recessed part 31 Mortar 40 Water stop member 41 for repairing Outer peripheral side adhesive part 42 Inner peripheral side adhesive part 43 Connecting part 44 Film (displacement allowable part)
45 Outer peripheral side adhesive 46 Inner peripheral side adhesive 48 Bending part (displacement allowable part)
49 Sponge (displaceable part)

Claims (4)

In a water stop member for repairing manholes used when repairing an existing manhole structure including a manhole and a pipe member connected to the manhole,
Made of water-impermeable material,
It is formed so that it can be inserted into an annular recess that opens to the inside of the manhole and extends to surround the open end of the tube member,
An outer peripheral side adhesive portion bonded to the outer peripheral side of the annular recess;
An inner peripheral side adhesive portion bonded to the inner peripheral side of the annular recess;
A displacement allowing portion that allows relative displacement of the outer peripheral side adhesive portion and the inner peripheral side adhesive portion ,
The outer peripheral side adhesive portion and the inner peripheral side adhesive portion have adhesiveness to mortar, and are bonded to the outer peripheral side and inner peripheral side of the annular recess by the mortar. Water stop member. In the water stop member for manhole repair according to claim 1,
The outer peripheral side adhesive portion and the inner peripheral side adhesive portion are formed in a plate shape extending in the center line direction of the tube member, and are arranged so as to overlap each other in the thickness direction,
A water stop member for repairing manholes, wherein the displacement allowing portion is configured to allow sliding between the outer peripheral side adhesive portion and the inner peripheral side adhesive portion. In the manhole renovation method used for the existing manhole structure with manholes and pipe members connected to the manholes,
Forming an annular recess on the wall of the manhole that extends to the inside of the manhole and extends to surround the open end of the tube member;
It is made of a material that does not allow water to pass through, and is bonded to the outer peripheral side of the annular recess by the mortar, the inner peripheral side bonded portion to the inner peripheral side of the annular recess by the mortar, and the both Inserting a water stop member for repair provided with a displacement permissible portion allowing relative displacement of the portion into the annular recess,
A manhole repair method characterized in that the outer peripheral side adhesive portion is bonded to the outer peripheral side of the annular recess by mortar , and the inner peripheral adhesive portion is bonded to the inner peripheral side of the annular recess by mortar . In the manhole renovation method according to claim 3 ,
An annular recess is formed in the protective concrete portion for protecting the pipe member placed between the insertion hole of the pipe member formed in the wall of the manhole and the outer peripheral surface of the pipe member inserted into the insertion hole. Characteristic manhole renovation method.

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