JP6029889B2 - Sealing material - Google Patents

Description

  The present invention relates to a sealing material for sealing a joint portion between concrete members.

  Conventionally, as disclosed in Patent Document 1, for example, grout is filled in a joint portion between concrete members to seal between the concrete members. In Patent Document 1, after a closing member for closing a gap is wound around the outer peripheral surface of a joint portion of a concrete member, a tube body that can be expanded and contracted is disposed so as to surround the closing member. And by supplying air to the tube body and expanding the tube body, the closing member is supported from the outside, and in this state, grout is injected into the gap between the concrete members. After the grout has hardened, the tube body is shrunk and removed.

JP 2007-327251 A

  As described above, in Patent Document 1, the step of winding the closing member around the outer peripheral surface of the joint portion between the concrete members, the step of disposing the tube body, the step of expanding the tube body, and the step of contracting and removing the tube body This is a complicated operation.

  Further, the joint portion of the concrete member is covered with the closing member, but the grout may leak from between the concrete members unless the closing member is wound so as not to deviate from the predetermined position.

  Furthermore, the closing member is supported by inflating the tube body before filling the grout. However, if the supporting force is insufficient, the grout may leak from between the concrete members. It is difficult to adjust the pressure of the air supplied to the air.

  That is, with the thing of patent document 1, while an operation | work becomes complicated, it is difficult to seal reliably so that grout may not leak.

  The present invention has been made in view of the above point, and the object of the present invention is to prevent the leakage of grout filled in the joint portion between the concrete members, while simplifying the operation, while reducing the work. The purpose is to ensure a sufficient sealing performance.

  In order to achieve the above object, the present invention is provided with a sandwiching portion sandwiched between concrete members and a pressure receiving portion facing the grout filling portion, and a wedge effect is obtained when the filling pressure of the grout acts on the pressure receiving portion. I did it.

The first invention is a seal material configured to seal between the first concrete member and the second concrete member arranged side by side in a predetermined direction and to be deformed by receiving a compressive force .
The sealing material clamping surface provided on the edge side of the joint surface with the second concrete member in the first concrete member and the edge side of the joint surface with the first concrete member in the second concrete member. A sandwiching portion sandwiched between the sealing material sandwiched surfaces,
The grout filling portion provided near the center of the joining surface of the first concrete member and the grout filling portion provided near the center of the joining surface of the second concrete member are arranged to face the grout filling portion. A pressure receiving part that receives the filling pressure of the grout filled in the filling part,
The dimension in the arrangement direction of the first and second concrete members in the pressure receiving part is set longer than the dimension in the same direction in the clamping part ,
The pressure receiving portion is formed so as to be in contact with the inner surface of the grout filling portion .

  According to this structure, since the clamping part is clamped by the sealing material clamping surfaces of the first and second concrete members and the sealing material is fixed between the first and second concrete members, the work is performed in comparison with the conventional example. Is simplified. The grout is filled in the grout filling portions of the first and second concrete members, and the filling pressure of the grout acts on the pressure receiving portion. Since the dimension of the first and second concrete members in the pressure receiving portion in the arrangement direction is longer than that of the sandwiching portion, when the filling pressure of the grout acts on the pressure receiving portion as described above, the pressure receiving portion functions like a wedge. It is suppressed that it goes out from between filling parts. Since the wedge effect increases as the filling pressure of the grout increases, it is possible to prevent the grout from leaking between the first and second concrete members.

In addition , when the pressure receiving portion receives the grout filling pressure, the pressure receiving portion is deformed along the inner surface of the grout filling portion and reliably contacts.

Further, since the pressure receiving portion contacts the inner surface of the grout filling portion, the filled grout is less likely to leak from between the pressure receiving portion and the inner surface of the grout filling portion.

According to a second invention, in the first invention,
A hollow portion is provided in the sandwiching portion.

  According to this configuration, when the sandwiching portion is sandwiched between the first and second concrete members, the sandwiching portion is easily deformed and comes into close contact with the sealing material sandwiching surface.

According to a third invention, in the first or second invention,
The pressure receiving portion is made of a member that is harder than the clamping portion.

According to this configuration, it is possible to obtain a wedge effect while suppressing unnecessary deformation of the pressure receiving portion when a high filling pressure of the grout is applied .

  According to 1st invention, the clamping part clamped by the 1st and 2nd concrete member, the pressure receiving part which is arrange | positioned so that it may face the grout filling part of a 1st and 2nd concrete member, and receives the filling pressure of grout, And the dimension of the first and second concrete members in the pressure receiving portion in the arrangement direction is made longer than that of the sandwiching portion. As a result, it is possible to prevent leakage of the grout by simplifying the operation of installing the sealing material and causing the pressure receiving portion to function like a wedge in the grout filling portion.

Further , since the sealing material is compressed and deformed, the pressure receiving portion that has received the filling pressure of the grout surely comes into contact with the inner surface of the grout filling portion, thereby further improving the sealing performance.

Further, since the pressure receiving portion comes into contact with the inner surface of the grout filling portion, the sealing performance can be further enhanced.

According to the second invention, since the hollow portion is provided in the sandwiching portion, the sandwiching portion can be easily deformed and brought into close contact with the sealing material sandwiching surfaces of the first and second concrete members, thereby further improving the sealing performance. Can be increased.

According to the third invention, since the pressure receiving portion is harder than the sandwiching portion, a wedge effect can be obtained while suppressing unnecessary deformation of the pressure receiving portion, and the sealing performance can be further enhanced.

It is a perspective view of the tunnel-like structure in which the sealing material concerning the present invention is used. It is a perspective view which shows a part of tunnel-like structure. It is a disassembled perspective view of a tunnel-like structure. It is the IV-IV sectional view taken on the line of FIG. It is a perspective view of the concrete member to which the sealing material was attached. It is an end view of a sealing material. It is a side view of a sealing material. It is a perspective view which shows the joint part of 1st concrete members. It is a perspective view which shows the seal structure in the joint part of 1st concrete members. It is the XX sectional view taken on the line in FIG. It is sectional drawing equivalent to the XIII-XIII line | wire in FIG. 1 of the state which has arrange | positioned the 1st concrete member and the 2nd concrete member facing each other. It is sectional drawing equivalent to the XIII-XIII line in FIG. 1 of the state which has arrange | positioned the 1st concrete member and the 2nd concrete member in the predetermined | prescribed assembly position. It is the XIII-XIII sectional view taken on the line in FIG. 1 of the state filled with the grout. FIG. 7 is a view corresponding to FIG. 6 according to Modification 1 of the sealing material. FIG. 7 is a view corresponding to FIG. 6 according to Modification 2 of the sealing material. FIG. 7 is a view corresponding to FIG. 6 according to Modification 3 of the sealing material. FIG. 7 is a view corresponding to FIG. 6 according to Modification 4 of the sealing material. FIG. 6 is a view corresponding to FIG. 6 according to Modification 5 of the sealing material. FIG. 7 is a view corresponding to FIG. 6 according to Modification 6 of the sealing material. FIG. 8 is a view corresponding to FIG. 6 according to Modification 7 of the sealing material.

  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 is a perspective view of a tunnel-like structure 1 constructed using a sealing material 30 (shown in FIG. 3 and the like) according to an embodiment of the present invention. In the description of this embodiment, the structure of the tunnel-like structure 1 will be described before the structure of the sealing material 30 is described.

  The tunnel-like structure 1 is a combination of a plurality of first concrete members 10a to 10c and second concrete members 20a to 20c. The first concrete members 10a to 10c and the second concrete members 20a to 20c are plate-like precast products curved in an arc shape. The three first concrete members 10a to 10c are combined so as to be aligned in the circumferential direction of the tunnel-like structure 1 to obtain a semicircular arc-shaped first ring housing A (see FIG. 2). At this time, the first concrete members 10a to 10c are assembled so that there is no gap between the joints. In some cases, as shown in FIG. 8, a water-stopping material such as a sealer S made of non-vulcanized butyl rubber is interposed between the joints of the first concrete members 10a to 10c to prevent leakage of the grout material to the joint. May be. The same applies to the second concrete members 20a to 20c.

  Moreover, the second ring housing B having a semicircular arc shape is obtained by combining the three second concrete members 20 a to 20 c so as to be arranged in the circumferential direction of the tunnel-like structure 1. The joint between the first concrete members 10a to 10c and the joint between the second concrete members 20a to 20c are shifted in the circumferential direction. Then, the first ring housing A and the second ring housing B are arranged so as to be alternately arranged in the longitudinal direction of the tunnel structure 1, thereby forming the tunnel structure 1. In general, when the first ring housing A and the second ring housing B are assembled and the tunnel-like structure 1 is constructed, a PC steel bar or a PC steel stranded wire is used to tension and fix the members.

  As shown in FIG.4 and FIG.5, the joint surface 11 is provided in the 1st concrete members 10a-10c in the side joined with the 2nd concrete members 20a-20c. Sealing material clamping surfaces 12 and 12 are provided at both edges of the joining surface 11 in the width direction (left and right direction in FIG. 4). The sealing material sandwiching surfaces 12, 12 are configured as flat surfaces extending in a direction perpendicular to the longitudinal direction of the tunnel-like structure 1, and are located on the same plane. A grout filling recess (grout filling portion) 13 is provided near the center of the joining surface 11, that is, between the sealing material sandwiching surfaces 12 and 12. The grout filling recess 13 has a groove shape extending continuously over both circumferential ends of the first concrete members 10a to 10c, and is filled with the grout filling recess 23 of the second concrete members 20a to 20c described later. A space R (shown in FIG. 12) is formed. The inner surface of the grout filling recess 13 has inclined surfaces 13a and 13a that are continuous with the sealing material sandwiching surfaces 12 and 12, respectively, and a bottom surface 13b that is continuous with the inclined surfaces 13a and 13a. The bottom surface 13 b is a flat surface extending in a direction orthogonal to the longitudinal direction of the tunnel-like structure 1.

  On the other hand, as shown in FIG. 11, the second concrete members 20 a to 20 c are provided with a joining surface 21 on the side to be joined to the first concrete members 10 a to 10 c. Similar to the joint surface 11 of the first concrete members 10 a to 10 c, the joint surface 21 is provided with sealing material sandwiching surfaces 22 and 22 and a grout filling recess (grout filling portion) 23. The inner surface of the grout filling recess 23 has inclined surfaces 23a, 23a and a bottom surface 23b. The grout filling recesses 23 of the second concrete members 20a to 20c and the grout filling recesses 13 of the first concrete members 10a to 10c are arranged to face each other, and both the concrete members 10a to 10c and 20a to 20c are joined. In this state, the grout filling space R is formed.

  Further, the second concrete members 20a and 20c are formed with a grout introduction hole 24 which opens to the bottom surface 23b of the grout filling recess 23. The grout introduction hole 24 is connected to a pumping device (not shown) for pumping the grout. There are a plurality of grout introduction holes 24 below the tunnel-like structure 1. Although not shown, the exhaust hole is on the upper side of the tunnel-like structure 1 and is closed after the grout material is injected.

  Next, the sealing material 30 will be described. As shown in FIGS. 2-5, the sealing material 30 is each provided in the inner-outer direction both sides of the tunnel-like structure 1 between the joint surfaces 11 and 21 of the 1st and 2nd concrete members 10a-10c, 20a-20c. .

  The sealing material 30 is a sponge packing formed by foaming a resin elastic material that is deformed by receiving a compressive force, and is formed in a long shape extending in the circumferential direction of the tunnel-like structure 1. The material of the sealing material 30 is not particularly limited as long as it can be deformed by receiving a compressive force.

  As shown in FIG.6 and FIG.7, the sealing material 30 is the clamping part clamped by the sealing material clamping surface 12 of the 1st concrete members 10a-10c and the sealing material clamping surface 22 of the 2nd concrete members 20a-20c. 31, the grout filling concave portion 13 of the first concrete members 10a to 10c and the grout filling concave portion 23 of the second concrete members 20a to 20c are arranged so as to face the grout filling concave portion. And a pressure receiving portion 32 for receiving a filling pressure.

  The clamping part 31 is formed along the first planar part 31a formed so as to extend along the sealing material clamping surface 12 of the first concrete members 10a to 10c and the sealing material clamping surface 22 of the second concrete members 20a to 20c. And a second flat surface portion 31b formed to extend. A chamfered portion 31c is formed on the second flat surface portion 31b. The dimensions of the first and second concrete members 10a to 10c and 20a to 20c in the holding portion 31 in the arrangement direction are based on the distance between the sealing material holding surfaces 12 and 22 of the first and second concrete members 10a to 10c and 20a to 20c. Is also set longer. Therefore, if the clamping part 31 is clamped by the sealing material clamping surfaces 12 and 22 of the 1st and 2nd concrete members 10a-10c and 20a-20c, it will compress-deform.

  The pressure receiving portion 32 is a pressure receiving portion extending in the direction in which the inclined surface portion 32a formed to extend along the inclined surface 13a of the first concrete members 10a to 10c and the first and second concrete members 10a to 10c, 20a to 20c. And a surface portion 32b. The inclined surface portion 32a is configured to contact the inclined surface 13a of the first concrete members 10a to 10c. A chamfered portion 32c is formed on the pressure receiving surface portion 32b.

  A cavity 34 is provided in the sealing material 30. The cavity 34 is configured by a hole that penetrates the sealing material 30 in the longitudinal direction. The cavity 34 is located between the first plane part 31 a and the second plane part 31 b of the sealing material 30, and most of the cavity part 34 is located in the clamping part 31. By forming the hollow portion 34, the sandwiching portion 31 is more easily crushed and deformed than the pressure receiving portion 32. The cross-sectional shape orthogonal to the longitudinal direction of the sealing material 30 in the cavity 34 is substantially circular.

  Moreover, as shown in FIG. 8 etc., although the pressure receiving part 32 protrudes toward the 1st concrete members 10a-10c rather than the clamping part 31, it does not protrude toward the 2nd concrete members 20a-20c side. Due to the protruding shape of the pressure receiving portion 32, the dimensions of the first and second concrete members 10 a to 10 c and 20 a to 20 c in the pressure receiving portion 32 in the arrangement direction are the first and second concrete members 10 a to 10 c and 20 a in the clamping portion 31. It is set longer than the dimension in the arrangement direction of ˜20c. Further, the dimensions of the first and second concrete members 10a to 10c and 20a to 20c in the pressure receiving portion 32 in the arrangement direction are the bottom surface 13b of the grout filling recess 13 of the first concrete members 10a to 10c and the second concrete members 20a to 20c. It is set longer than the distance between the bottom 23b of the recess 23 for grout filling 20c. Therefore, the pressure receiving portion 32 is also sandwiched between the bottom surfaces 13b and 23b and is compressed and deformed.

  Next, a procedure for constructing the tunnel-like structure 1 using the sealing material 30 configured as described above will be described.

  First, as shown in FIGS. 4 and 5, one of the two joint surfaces 11, 11 of the first concrete members 10 a to 10 c has one of the joint surfaces 11 on the inner side of the tunnel-like structure 1 and the outer side. Sealing materials 30 and 30 are respectively fixed to both sides. That is, the 1st plane part 31a of the sealing material 30 is adhere | attached on the sealing material clamping surface 12 of 1st concrete members 10a-10c, and the inclined surface part 32a is adhere | attached on the inclined surface 13a of 1st concrete members 10a-10c. At this time, it is preferable to apply an adhesive to the sealing material sandwiching surfaces 12 and the inclined surfaces 13a of the first concrete members 10a to 10c, but the fixing method of the sealing material 30 is not limited to this, and various fixings are possible. The method can be used. As described above, both the inner and outer sealing materials 30, 30 are fixed to the first concrete members 10a to 10c. The sealing material 30 is not fixed to the other joint surface 11 of the first concrete members 10a to 10c.

  At this time, as shown in FIG. 8 and the like, the end portions of the sealing material 30 are joined at the joining end portions where the first concrete member 10a and the first concrete member 10b and the first concrete member 10b and the first concrete member 10c are joined. Is positioned closer to the center in the circumferential direction than the joining end, and a portion where the sealing material 30 does not exist is formed. Then, after assembling the first ring housing A, as shown in FIG. 9, the sealing material 30 ′ is separately fixed to a portion where the sealing material 30 does not exist. The reason is that when the first ring housing A is assembled, the sealing material 30 is present at the joint portion of the first concrete member 10a, the first concrete member 10b, and the first concrete member 10b and the first concrete member 10c. This is because another concrete member may come into contact with the end portion of the sealing material 30 and the sealing material 30 may be damaged, and by creating a portion where the sealing material 30 does not exist at the joining end portion, the sealing material 30 breakage can be effectively prevented. Further, after assembling the first ring housing A, by fixing another sealing material 30 ′ to a portion where the sealing material 30 does not exist, the sealing material 30 is made continuous so that there is no gap, and the sealing materials 30 are joined together. You can be sure. Furthermore, as shown in FIG. 10, by covering the joint portions of the sealing materials 30 and 30 ′ with a sealer S made of a strip-like non-vulcanized butyl rubber, it is possible to increase the water stop and prevent the grout material from leaking.

  Similarly, the sealing material 30 is fixed to the joint surfaces 21 of the second concrete members 20a to 20c. At this time, of the two joint surfaces 21 and 21 of the second concrete members 20a to 20c, the joint surface 21 joined to the joint surface 11 to which the sealing material 30 of the first concrete members 10a to 10c is fixed is sealed. The sealing material 30 is fixed to the other joint surface 21 without fixing the material 30.

  Thereafter, as shown in FIG. 2, the three first concrete members 10 a to 10 c are arranged in the circumferential direction of the tunnel-like structure 1 to constitute the first ring housing A, and the three second concrete members 20 a to 20 c are arranged. The second ring housing B is configured side by side in the circumferential direction of the tunnel-like structure 1. Thereby, the sealing material 30 fixed to the three first concrete members 10 a to 10 c continues in the circumferential direction of the tunnel-like structure 1. Similarly, the sealing material 30 of the second concrete members 20a to 20c is continuous.

  Thereafter, the first ring housing A and the second ring housing B are arranged so as to be alternately arranged in the longitudinal direction of the tunnel structure 1, thereby forming the tunnel structure 1.

  At this time, as shown in FIG. 11, the joining surface 11 to which the sealing material 30 of the first concrete members 10a to 10c is fixed, and the joining surface 21 to which the sealing material 30 of the second concrete members 20a to 20c is not fixed, And the second concrete members 20a to 20c are moved in the direction of the white arrow to approach the first concrete members 10a to 10c.

  Then, as shown in FIG. 12, when the first concrete members 10a to 10c and the second concrete members 20a to 20c are brought close to the assembly position, the grout filling concave portion 13 and the grout filling concave portion 23 are combined to grout filling. A space R is formed.

  At this time, the joint surface 11 of the first concrete members 10a to 10c and the joint surface 21 of the second concrete members 20a to 20c are arranged to face each other with a predetermined interval. This is because the tunnel-like structure 1 is not necessarily a straight line, and may be constructed to draw a gentle curve or may be constructed in a gentle up-and-down shape. In this case, the first ring housing This is because the gap between A and the second ring housing B needs to be changed little by little in the left-right direction and the up-down direction.

  Moreover, the clamping part 31 of each sealing material 30 is clamped by the sealing material clamping surface 12 of the first concrete members 10a to 10c and the sealing material clamping surface 22 of the second concrete members 20a to 20c and is compressed and deformed. Thereby, the cavity 34 is crushed. The first flat portion 31a and the second flat portion 31b of the sandwiching portion 31 are in a shape along the sealing material sandwiching surface 12 and the sealing material sandwiching surface 22, respectively, by the compressing deformation of the sandwiching portion 31, so that the sandwiching portion 31 is firmly adhered. Thereby, the grout filling space R is sealed.

  Further, the pressure receiving portion 32 of the sealing material 30 is sandwiched between the inner surface of the grout filling concave portion 13 of the first concrete members 10a to 10c and the inner surface of the grout filling concave portion 23 of the second concrete members 20a to 20c and is compressed and deformed. Thereby, the pressure receiving part 32 becomes a shape along the inner surface of the grout filling concave portion 13 and the inner surface of the grout filling concave portion 23 and reliably adheres thereto. Further, due to the compression deformation of the pressure receiving portion 32, the pressure receiving surface portion 32 b of the pressure receiving portion 32 is deformed to bulge into the grout filling space R.

  Thus, after fixing the sealing material 30 to the 1st and 2nd concrete members 10a-10c and 20a-20c, the 1st ring housing A and 2nd by the 1st and 2nd concrete members 10a-10c, 20a-20c. After assembling the ring housing B, the first ring housing A and the second ring housing B are arranged so as to be aligned in the longitudinal direction of the tunnel-like structure 1 so that the sealing material 30 is placed in the first and second concrete members 10a to 10c. , 20a to 20c, the installation work of the sealing material 30 can be easily performed. In addition, since the end of the ground side portion of the tunnel-like structure 1 is fixed and sealed by mortar injection (indicated by reference numeral M in FIG. 1) or the like, the grouting material does not leak from this portion. It has become.

  Next, the grout filling space R is filled with grout. That is, after connecting a pumping device for pumping the grout to the grout introduction hole 24, the pumping of the grout is started. The grout flows into the grout filling space R from the grout introduction hole 24. The grout that has flowed into the grout filling space R applies pressure to the pressure receiving surface portion 32 b of the pressure receiving portion 32 of the sealing material 30. The pressure receiving part 32 that has received the pressure tends to come out from between the first concrete members 10a to 10c and the second concrete members 20a to 20c. At this time, the first and second concrete members 10a in the pressure receiving part 32 are used. 10c and 20a-20c are set to be longer than the dimensions in the same direction in the clamping part 31 and the pressure receiving part 32 is large, so that the pressure receiving part 32 functions like a wedge. The pressure receiving part 32 can be prevented from going outside. Since the wedge effect increases as the filling pressure of the grout increases, it is possible to prevent the grout from leaking between the first and second concrete members 10a to 10c and 20a to 20c. In this way, all the grout filling spaces R are filled with grout.

  As explained above, according to the sealing material 30 according to this embodiment, the sandwiching portion 31 sandwiched between the first and second concrete members 10a to 10c and 20a to 20c, and the first and second concrete members 10a to 10c. 10c, 20a-20c, and a pressure receiving portion 32 that is arranged so as to face the grout filling recesses 13, 23 and receives the filling pressure of the grout, and the first and second concrete members 10a-10c, 20a in the pressure receiving portion 32 The dimension in the arrangement direction of 20 c is longer than that of the sandwiching portion 31. Thereby, while simplifying the installation work of the sealing material 30, it is possible to prevent leakage of the grout by causing the pressure receiving portion 32 to function like a wedge in the grout filling space R.

  Further, since the sealing material 30 is compressed and deformed, the pressure receiving portion 31 that has received the grout filling pressure surely contacts the inner surfaces of the grout filling recesses 13 and 23, thereby further improving the sealing performance. Can do.

  Moreover, since the cavity part 34 was provided in the clamping part 31, it can deform | transform easily and can make the clamping part 31 closely_contact | adhere to the sealing material clamping surfaces 12 and 22 of the 1st and 2nd concrete members 10a-10c and 20a-20c. This can further improve the sealing performance.

  Further, since the pressure receiving portion 32 comes into contact with the inner surfaces of the grout filling recesses 13 and 23, the sealing performance can be further enhanced.

  In addition, the sealing material 30 is not restricted to what was mentioned above, For example, you may comprise like the modifications 1-6 shown in FIGS.

  In Modification 1 shown in FIG. 14, the entire cavity portion 34 is formed so as to be located inside the clamping portion 31. Thereby, the clamping part 31 becomes easy to be crushed.

  In the second modification shown in FIG. 15, two hollow portions 34 are provided. One cavity 34 is located inside the clamping part 31, and the other cavity 34 is located inside the pressure receiving part 32. Thereby, both the clamping part 31 and the pressure receiving part 32 become easy to compress-deform, and can improve a sealing performance further.

  In the third modification shown in FIG. 16, the cavity 34 is omitted.

  In the modification 4 shown in FIG. 17, the pressure receiving part 32 is formed so that it may protrude to the 1st and 2nd concrete members 10a-10c and 20a-20c side, Therefore Compared with the sealing material 30 of the said embodiment. Thus, the dimension of the first and second concrete members 10a to 10c and 20a to 20c in the pressure receiving portion 32 in the arrangement direction becomes longer, and the wedge effect is further enhanced. Moreover, in this modification 4, the chamfering part of the clamping part 31 is abbreviate | omitted.

  In Modification 5 shown in FIG. 18, the cavity 34 is omitted in Modification 3.

  In the modification 6 shown in FIG. 19, the clamping part 31 and the pressure receiving part 32 are comprised by another member, and are integrated. The pressure receiving part 32 is made of a member that is harder than the clamping part 31. As a result, the sandwiching portion 31 can be easily compressed and deformed, and the strength of the pressure receiving portion 32 can be sufficiently secured to prevent unnecessary deformation, so that a rust effect can be reliably obtained. Can do.

  In the modified example 7 shown in FIG. 20, the hardness of the clamping part 31 and the pressure receiving part 32 is changed like the modified example 6. FIG. Further, in the modified example 7, the hollow portion is omitted. Furthermore, in the modified example 7, as in the modified example 4, the pressure receiving part 32 is formed so as to protrude toward the first and second concrete members 10a to 10c, 20a to 20c from the sandwiching part 31.

  Moreover, in the said embodiment, although the sealing material 30 was used for construction | assembly of the tunnel-shaped structure 1, it is not restricted to this, The sealing material 30 can be used for various concrete structures.

  As described above, the sealing material according to the present invention can be used, for example, when a tunnel-like structure is constructed.

DESCRIPTION OF SYMBOLS 1 Tunnel-like structure 10a-10c 1st concrete member 11 Joining surface 12 Sealing material clamping surface 13 Grout filling recessed part (grout filling part)
20a-20c 2nd concrete member 21 Joint surface 22 Sealing material clamping surface 23 Grout filling recess (grout filling part)
30 Sealing material 31 Holding part 32 Pressure receiving part 34 Cavity part

Claims (3)

In the sealing material configured to seal between the first concrete member and the second concrete member arranged side by side in a predetermined direction and to be deformed by receiving a compressive force ,
The sealing material clamping surface provided on the edge side of the joint surface with the second concrete member in the first concrete member and the edge side of the joint surface with the first concrete member in the second concrete member. A sandwiching portion sandwiched between the sealing material sandwiched surfaces,
The grout filling portion provided near the center of the joining surface of the first concrete member and the grout filling portion provided near the center of the joining surface of the second concrete member are arranged to face the grout filling portion. A pressure receiving part that receives the filling pressure of the grout filled in the filling part,
The dimension in the arrangement direction of the first and second concrete members in the pressure receiving part is set longer than the dimension in the same direction in the clamping part ,
The pressure receiving part is formed so as to be in contact with the inner surface of the grout filling part . The sealing material according to claim 1,
A sealing material characterized in that a cavity is provided in the clamping part . The sealing material according to claim 1 or 2,
The pressure-receiving portion is made of a member that is harder than the clamping portion .

Images