JP4437971B2 - Segment connection structure - Google Patents

Description

  The present invention relates to a connecting structure of segments for constructing a box culvert such as a sewer, a railway, and an underground river.

  Steel segments, steel-concrete composite segments, concrete segments, and the like are applied to segments used for box culverts for building tunnel lining inner walls of sewers, railways, underground rivers, and the like. These segments are provided with joints. This joint portion is generally fixed to the concrete of the segment via an anchor reinforcing bar, and a box culvert is constructed by connecting a number of segments in the circumferential direction and the axial direction via this joint portion. Become. Therefore, this joint part plays an especially important role in performing construction using segments, and many proposals have been made in the past.

  Conventionally proposed joint structures also have various improvements. For example, (1) the main improvement is to simplify the structure of the joint, (2) the main improvement is to improve the water stoppage of the joint, (3) the joint The main improvement is to facilitate the connecting operation, (4) the main improvement is to improve the strength of the joint portion to the same extent as the segment body, and (5) the plurality of points described above. The main improvement is to improve simultaneously. In addition, this improved technique is naturally different in structure depending on the steel segment, the steel-concrete composite segment, and the concrete segment.

  Conventionally, Patent Documents 1 to 4 have been proposed for this type of segment connection structure.

  In Patent Document 1, connecting groove portions having a substantially lip groove shape in cross section are provided at both ends in the circumferential direction of the segment body, and the joining key is extended in the segment surface direction (tunnel axial direction) across the connecting groove portions of the adjacent segments in the circumferential direction. ), The connecting structure of the segments to be inserted is disclosed. In this segment connection structure, the joint fitting installed at the end of the segment is directly bolted to the side surface of the end of the steel member by a plurality of mounting bolts. Further, by making the joint fitting made of ductile cast iron, it is possible to improve the strength and rigidity of the joint portion. In addition, there is an advantage that the segments can be easily joined through the joining key.

  In Patent Document 2, when joining steel segments having a main girder and a joint plate extending in the circumferential direction and the axial direction of the tunnel, the main girder and the joint plate are attached with high-strength bolts, and the joint plate is connected to the tunnel. A joint structure that is joined by a plurality of short bolts penetrating in the circumferential direction is disclosed. In this joint structure, there is also an advantage that the tensile strength of the bolt for joining the steel segments can be quality / guaranteed, the steel segments can be joined firmly and firmly, and high water-stopping performance can be maintained.

  Patent Document 3 discloses a structure in which a joint portion of a composite segment effective when a large bending moment or tensile force such as a large cross section, a large depth, or an underground river acts has the same strength and rigidity as the segment body. Yes. And, as a method of realizing a segment joint with high rigidity and high yield strength, a box-shaped reinforcing member whose inner side is open is arranged on the side edge of the inner hollow steel plate of the segment so as to straddle the segment joint adjacent in the circumferential direction. A configuration in which the inner steel plate is bolted to the inner steel plate is disclosed. Further, as a method for realizing a segment joint having the same high rigidity and high yield strength as that of the segment main body, a method of covering the segment inner edge side with a lid so as to straddle the segment joint is disclosed.

In Patent Document 4, in a joint structure of a steel-concrete composite block used for constructing a land culvert box, a friction joint bolt and a tension joint bolt are combined in order to improve the displacement resistance at the joint. A segment joint structure is disclosed. With the above-described structure, there is an advantage that the displacement resistance at the joint portion can be improved along with the reduction of the construction time and cost of the culvert box.
JP-A-8-184296 JP 2000-80892 A Japanese Unexamined Patent Publication No. 7-62988 JP 2004-3172 A

  However, in the segment connecting structure disclosed in Patent Document 1, adjacent segments are connected by a joining key formed in an H shape or an I shape, and an intermediate portion of the joining key formed in an H shape or an I shape is provided. It plays a role as a web. For this reason, when a bending load is applied to the joint portion, the web resists bending, and the secondary moment of section in the segment joint portion cannot be increased efficiently, which is uneconomical. In order to increase the bending strength of the joint, the thickness of the joining key must be increased, which is uneconomical. Also, simply by inserting the joining key into the connecting hole, the joining key is not mechanically fixed to the segment joint, and the joining key may fall out of the connecting groove when it is placed at an angle. The request for improvement was growing.

  In addition, the segment connection structure disclosed in Patent Document 2 is not applicable when the concrete plate is placed inside because the joint plate is horizontally moved in the segment and bridged with the adjacent segment to be connected. . In addition, the processing inside the segment becomes complicated. Furthermore, since the joint plate has a plate shape, it is not economical because the secondary moment of section cannot be secured efficiently.

  In the segment connection structure disclosed in Patent Document 3, there is a problem in that the box-shaped reinforcing member disposed on the inner air side steel plate of the segment protrudes toward the inner air side of the segment, and the flatness of the inner surface of the segment cannot be ensured. Moreover, it is necessary to inject the grout into the concave portion formed on the back side (that is, the natural mountain side) of the box-shaped reinforcing member, and there is a problem that it takes construction cost and labor.

  In the segment connection structure disclosed in Patent Document 4, in order to achieve the bending strength equivalent to that of the segment body, it is necessary to increase the plate thickness of the horizontal flange. I can't deal with it.

  Therefore, the present invention has been devised in view of the above-mentioned conventional problems, and the joint portion has a configuration having high rigidity and high proof strength comparable to the segment body, and the joint portion is out of the segment body. It is an object of the present invention to provide a segment connecting structure capable of ensuring the flatness of a segment without going on a business trip.

  The inventor solves the above-described problems, and further [1] improves the strength of the joint portion of the segment, [2] improves the resistance to bending load acting on the joint portion, [3] simplifies the structure, 3) Improvement of workability, [4] In order to improve water stoppage, the connecting member fixing plate is fixed to the main girder and joint plate of the segment, and the joint plates of the segments adjacent in the circumferential direction are butted together. In addition, the web of the connecting member is inserted from one or both of the inner edge side and the outer edge side of the segment into the connecting member inserting opening provided in each connecting member fixing plate and the connecting member inserting opening provided in the joint plate. Then, the segment connecting structure in which the flange of the connecting member is friction-bonded to the connecting member fixing plate with a bolt was invented.

  Specifically, according to a first aspect of the present invention, there is provided a connecting structure of the segments constructed by connecting a plurality of segments formed by filling a steel shell with concrete in a circumferential direction and an axial direction. The connecting member fixing plate is fixed to the plate, and the joint plates of the segments adjacent in the circumferential direction are abutted with each other, and the connecting member insertion opening provided in each connecting member fixing plate and the each connecting plate are provided. The web of the connecting member is inserted into the connecting member insertion opening from one or both of the inner edge side and the outer edge side of the segment, and the flange of the connecting member is frictionally joined to the connecting member fixing plate with a bolt. .

  In a second aspect based on the first aspect, the connecting member is constituted by a T-shaped connecting member, an L-shaped connecting member, or a connecting member integrated with a plurality of webs in which a plurality of webs are provided on a wide flange. It is characterized by.

  The third invention is characterized in that, in the first or second invention, a shape steel is used for the connecting member.

The fourth invention is characterized in that, in the first to third inventions, a water stop material is adhered to the inner surface of the flange of the connecting member on the side in contact with the connecting member fixing plate.

  According to a fifth aspect of the present invention, in the first to fourth aspects of the invention, the connecting member receiving member is fixed to the inside of the skin plate of the segment, and the connecting member is inserted into the connecting member fixing plate provided on the inner edge side of the segment. A web tip of the connecting member inserted from the opening for contact is in contact with the connecting member receiving member.

According to a sixth aspect, in the fifth aspect, the web tip of the connecting member is engaged with a positioning groove for the connecting member in the connecting member receiving member.
According to a seventh aspect based on the fifth aspect, the web front end of the connecting member is engaged with a positioning groove for the connecting member in the connecting member receiving member, and the web front end and the connecting member receiving member are It is characterized by being bolted.

  In addition, in an eighth invention according to the first to fourth inventions, a connecting member fixing plate is provided on an inner edge side and an outer edge side of the segment, and an inner edge side of the segment is formed in the connecting member insertion opening of the connecting member fixing plate And the web of the connection member of the same shape is inserted from the outer edge side, and the tip of the web is inserted into the connection member insertion opening provided on the connection member fixing plate on the other side.

  According to a ninth invention, in the first to fourth inventions, the connection member fixing plates are provided on the inner edge side and the outer edge side of the segment, and the connection member insertion opening of the connection member fixing plate has an inner edge side of the segment. And the web of the connection member of the same shape was inserted from the outer edge side, and the front-end | tip of this web was faced | matched with the front-end | tip of the other party web.

  According to a tenth invention, in the first to ninth inventions, the web insertion portion of the connecting member surrounded by the main girder, the skin plate, the joint plate, and the connecting member fixing plate is hollow, or for inserting the web. A gap is formed and filled with filling concrete.

  The segment connecting structure according to the present invention is such that the joint plates of the segments adjacent in the circumferential direction are abutted with each other, and the connection member insertion opening of the connection member fixing plate fixed to each segment is connected to the inner edge side and the outer side of the segment. The web of the connecting member was inserted from one or both of the edge sides, and the flange of the connecting member was friction bonded to the connecting member fixing plate with a bolt. As a result, the connecting member of the present invention can secure a secondary moment of inertia by the web and the flange, and can realize a joint having a high yield strength and a high rigidity with respect to bending acting on the joint portion, as well as a shear load and a tensile load. The strength can be increased. Further, according to the present invention, it is possible to realize a segment connecting structure that has no protrusion on the segment surface and can ensure flatness.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, the embodiment shown in FIGS. 1 to 6 will be described. 1 is a perspective view of a segment joint portion, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is a plan view of FIG. 1, FIG. 4 is a plan view of a connecting member fixing plate, and FIG. FIG. 6 is a perspective view of an L-shaped connecting member.

  This embodiment combines the connecting member such as the T-shaped connecting member 7 shown in FIG. 5 or the L-shaped connecting member 12 shown in FIG. 6 and the connecting member fixing plate 3 shown in FIG. 4 for fixing the connecting member. This is characterized by the fact that the joint part is constructed. In this way, by combining the connecting member such as the T-shaped connecting member 7 and the connecting member fixing plate 3 to form the joint portion, the joint portion can be applied to the shear load, the tensile load, and the bending load acting on the joint portion. It can be configured to have the same high rigidity and high yield strength as the segment body.

  Hereinafter, it demonstrates in order. In each of the above-mentioned drawings, a composite segment is shown in which a steel shell made up of a main girder 1, a joint plate 5 and a skin plate 2 is filled with a filling concrete 6. The filling concrete 6 is shown only in FIG. 1, and the concrete is omitted in other drawings. As shown in FIG. 5, the T-shaped connecting member 7 is formed in a T shape from a web 17 and a flange 19. Further, the L-shaped connecting member 12 is formed in an L shape from a flange 19 and a web 17 as shown in FIG. Each flange 19 is provided with a bolt insertion hole 10.

  The connecting member fixing plate 3 is formed of a rectangular steel plate as shown in FIG. 4 and is fixed to the main girder 1 and the joint plate 5 of the segment body by welding at the time of manufacturing the segment. The shape of the connecting member fixing plate 3 will be described with reference to FIG. 4. The width (W) of the connecting member fixing plate 3 is substantially the same as that of the segment body, that is, the length reaching the main girders 1 on both sides. The length (L) of the connecting member fixing plate 3 is a predetermined length from one end side to the other end side in the segment circumferential direction when the one end edge 25 is disposed in contact with the joint plate 5 of the segment 20. Is provided. This length (L) is necessary for the tensile and bending loads that the connecting member fixing plate 3 acts on the joint when the connecting member fixing plate 3 is fixed to the main beam 1 and the joint plate 5 of the segment 20. It is provided in a length that can ensure sufficient strength. The length (L) is adjusted to an appropriate length in relation to the thickness of the connecting member fixing plate 3 and the like. Further, a plurality of connecting member insertion openings 4 having a predetermined width and a predetermined length are provided in parallel with a predetermined interval from one end edge 25 to the other end edge 26 of the connecting member fixing plate 3. Bolt insertion holes 10 are formed on both sides of the connecting member insertion opening 4.

  As shown in FIG. 1 and FIG. 3, the one end edge 25 of the connecting member fixing plate 3 is disposed so as to contact the inner edge of the joint plate 5 on the inner space side. Therefore, the opening end of the connecting member insertion opening 4 is disposed so as to face the inner surface of the joint plate 5. The one end edge 25 of the connecting member fixing plate 3 and the joint plate 5 are fixed by welding, and both side edges of the connecting member fixing plate 3 and the inner edge of the main beam 1 are fixed by welding. The joint plate 5 is provided with a connecting member insertion opening 4a. The connection member insertion opening 4a is provided at a predetermined depth from the connection member fixing plate 3 side, and when the connection member fixing plate 3 is fixed to the segment body, the connection member insertion opening 4 and the connection member insertion are inserted. The opening 4a for communication communicates. The surface exposed to the outer surface of the connecting member fixing plate 3 is subjected to anticorrosion processing as necessary.

  1 and 3, when the ends of the segments 20 adjacent in the circumferential direction are brought into contact with each other, the connecting member insertion openings 4a in the joint plate 5 of both segments communicate with each other. At this time, the connection member insertion openings 4 of the connection member fixing plates 3 in both segments 20 communicate with each other through the connection member insertion openings 4a. In this state, the web 17 of the T-shaped connecting member 7 shown in FIG. 5 can be inserted into the connecting member inserting opening 4 and the connecting member inserting opening 4a of each segment adjacent in the circumferential direction. The case of the L-shaped connecting member 12 is the same as described above.

  The web 17 of the T-shaped connecting member 7 is inserted into the connecting member inserting opening 4 and the connecting member inserting opening 4 a from the outer surface side of the connecting member fixing plate 3. Further, as shown in FIG. 2, a concave portion 21 having a thickness of the flange 19 of the connecting member fixing plate 3 is formed on the outer surface of the connecting member fixing plate 3 at a portion where the connecting member fixing plate 3 is disposed. Yes. The flange 19 is positioned in the recess 21 and does not protrude from the connecting member fixing plate 3, and the flatness of the outer surface of the connecting member fixing plate 3 is ensured.

  When separate connecting members such as the T-shaped connecting member 7 and the L-shaped connecting member 12 are used at intervals in the segment width direction, the T-shaped connecting member fixing plate 3 is not provided with the recess 21. A flange 19 such as the connecting member 7 protrudes from the outer surface of the connecting member fixing plate 3, and a space is formed in a portion surrounded by the connecting member fixing plate 3 and the flange 19 of the connecting member. In this case, the space portion is covered with a wire rod or a wire net, and mortar is poured to ensure the flatness of the connecting member fixing plate 3. Further, when the flange 19 such as the T-shaped connecting member 7 does not protrude from the height of the main girder 1 and the space formed by the plate thickness of the flange 19 can be allowed, the T-shaped connecting member can be viewed from the direction in which the space can be allowed. 7 is inserted, and the part where the steel material surface on the outer edge side of the flange 19 is exposed is dealt with by applying anti-corrosion specifications as necessary.

  Further, as shown in FIG. 2, a connecting member receiving member 8 with which the tip 18 of the web 17 of the T-shaped connecting member 7 abuts is fixed to the inner surface of the skin plate 2 by welding. When the web 17 of the T-shaped coupling member 7 or the L-shaped coupling member 12 is in direct contact with the skin plate 2 and the joint portion is subjected to bending deformation, the coupling member receiving member 8 protrudes out of the plane. This is installed on the skin plate 2 to prevent this.

  As shown in FIGS. 17 and 18, the connecting member receiving member 8 is preferably provided with a positioning groove 16. By engaging the web 17 with the positioning groove 16, the tip of the web 17 is reliably positioned, so that the T-shaped connecting member 7 and the L-shaped connecting member 12 can exhibit more proof stress. In addition, the welding of the connecting member receiving member 8 to the skin plate 2 is preferably a minimum welding amount of a temporary attachment, and the welding amount is excessively increased so that the welding distortion of the skin plate 2 does not occur. Further, in order to ensure the connection between the tip 18 of the web 17 of the T-shaped connecting member 7 or the L-shaped connecting member 12 and the connecting member receiving member 8, a female screw 22 is provided at the tip of the web 17 as shown in FIG. At the same time, as shown in FIG. 21, it is desirable that the connecting member receiving member 8 is also provided with a bolt insertion hole 10 penetrating inside and outside the positioning groove 16. Then, as shown in FIG. 19, the front end 18 of the web 17 of the connecting member is fitted into the positioning groove 16 and the bolt 9 is screwed into the female screw 22 from the rear side of the connecting member receiving member 8 through the bolt insertion hole 10. By doing so, the web 17 of the connecting member and the connecting member receiving member 8 can be firmly fixed. Thereby, the T-shaped connecting member 7 and the L-shaped connecting member 12 can exhibit a greater proof strength against a tensile load and a bending load acting on the joint portion.

  A method for inserting the T-shaped connecting member 7 into the connecting member inserting opening 4 and the connecting member inserting opening 4a is performed as follows. As shown in FIG. 1 and FIG. 3, by connecting the joint plates 5 of the segments 20 adjacent in the circumferential direction of the tunnel, the connection member insertion openings 4 a of the respective joint plates 5 and the connection members 3 are inserted. The opening 4 communicates. Next, the T-shaped connecting member 7 or the L-shaped connecting member 12 is disposed across the adjacent segments 20 in the tunnel circumferential direction, and the web 17 is connected to the connecting member insertion opening 4 of the connecting member 3 and the joint plate 5. The connecting member insertion opening 4a is inserted. Thereafter, the flanges 19 of the T-shaped connecting member 7 and the L-shaped connecting member 12 are fixed to the connecting member fixing plate 3 by the bolts 9 and the nuts 28. The nut 28 is previously attached to the back side of the connection fixing plate 3 by welding. In this way, the T-shaped connecting member 7 or the L-shaped connecting member 12 and the connecting member fixing plate 3 are frictionally joined via the bolt 9 and the nut 28 to form a joint portion. Thereby, it can be comprised so that a joint part may have the same high proof stress and high rigidity as a segment main body with respect to the tensile load and bending load which act on the joint part of the segment 20 adjacent to the circumferential direction.

  As shown in FIGS. 1 and 3, the T-shaped connecting member 7 is preferably installed with a plurality of predetermined intervals in order to disperse the load in the segment width direction. Similarly to the above, the L-shaped connecting member 12 may be installed with a plurality of predetermined intervals. In addition, the T-shaped connecting member 7 and the L-shaped connecting member 12 may be formed by using a section steel alone or in combination, and cost reduction can be achieved by using the section steel in this way. Further, when the T-shaped connecting member 7 shown in FIG. 5 is used, if the center of the H-shaped steel web is cut and used, it can be manufactured at low cost regardless of build-up. Further, in order to ensure the flatness of the segment, it is desirable to provide a seating on the connecting member flange 19 in the bolt mounting portion so that the head portion of the bolt does not jump out of the surface.

  As described above, the flange is passed through the joint portion of the segment 20 adjacent in the circumferential direction and through the connection member insertion opening 4 a of the joint plate 5 and the connection member insertion opening 4 of the connection member fixing plate 3. By using the T-shaped connecting member 7, it is possible to realize a joint having a high yield strength against bending by making use of the moment of inertia of the cross section of the T-shaped connecting member 7. In order to achieve the same bending strength and bending rigidity as the segment body at the joint, it is necessary to appropriately adjust the thickness of the flange 19 and web 17 of the T-shaped connecting member 7 and the number of T-shaped connecting members 7. Good. In order to realize a joint with high strength and low cost with the same amount of steel, it is desirable to increase the thickness of the flange 19 of the T-shaped connecting member 7. The same applies to the L-shaped connecting member 12 as well. Further, in order to realize the shear strength equivalent to that of the segment body, it is effective to increase the thickness of the web in the L-shaped connecting member 12 or the T-shaped connecting member 7 or the connecting member of the embodiment described later. By using the connecting member in which the flange and the web are integrated in this way, the connecting portion can be reinforced more efficiently than when a plurality of normal plate-like connecting plates are arranged separately on the flange and the web.

  Moreover, in order to improve the water stop of a joint part, as shown to FIG. 5, FIG. 6, water stop so that the bolt insertion hole 10 may be surrounded by the inner surface of the flange of the T-shaped connection member 7 and the L-shaped connection member 12. A material attachment groove 23 may be provided, and the water stop material 11 may be adhered to the groove 23. At this time, it is more preferable to place a washer-like water-stopping rubber under the bolt head. As a result, water does not enter from the flange 19 of the T-shaped connecting member 7 and the bolt insertion hole 10 of the connecting member fixing plate 3, and the water stoppage of the joint portion can be improved.

  In addition to the T-shaped connecting member 7 and the L-shaped connecting member 12, the connecting member can be a connecting member in which these members are connected and integrated. Examples thereof will be described in the embodiment shown in FIGS. In each figure, a connecting member 13 integrated with a plurality of webs is shown. In the connecting member 13 integrated with a plurality of webs, three webs 17 are integrally provided with a wide flange 19. The flange 19 is provided with a bolt insertion hole and a water stop material 11. The bolt insertion holes 10 may be provided in one row between the webs 17 as shown in FIG. Further, when the tensile or bending load acting on the segment is great, a plurality of rows of bolt insertion holes 10 may be provided in the flange 19 between the webs 17 as shown in FIG. Good.

  Also in this embodiment, as shown in FIGS. 7 and 8, each web 17 of the connecting member 13 integrated with a plurality of webs is connected to the connecting member insertion opening 4a of each joint plate 5 in the segment 20 adjacent in the circumferential direction. And a plurality of web-integrated connecting members 13 and the connecting member fixing plate 3 are frictionally joined via bolts 9. Thereby, the strength of the joint portion can be configured to be about the same as that of the segment body with respect to the tensile load, bending load, and shear load acting on the joint portion of the segment adjacent in the tunnel circumferential direction.

  Since the connecting member 13 integrated with a plurality of webs is a wide flange 19, the rigidity of the connecting member 13 can be increased as the area of the flange increases, and the T-shaped connecting member 7 and the L-shaped connecting member 12 can be connected to each other. In comparison, it is advantageous in increasing the proof stress of the joint. Further, by using the wide flange 19 extending to the main girder 1 on both sides of the segment 20, a space due to a step between the wide flange 19 and the outer surface of the connecting member fixing plate 3 can be eliminated, and the outer surface of the segment can be eliminated. This is more advantageous than the T-shaped connecting member 7 and the L-shaped connecting member 12 in ensuring flatness. In order to facilitate the attachment work of the connecting member to the segment joint portion, the T-shaped connecting member 7 and the L-shaped connecting member shown in FIGS. 5 and 6 are used rather than the connecting member 13 integrated with a plurality of webs shown in FIG. It is desirable to use individual connection members such as member 12.

  Further, in the joint portion of the segment 20, when the axial force is dominant in the segment circumferential direction, as shown in FIG. 12, the joint plate 5, the main beam 1, the skin plate 2, and the connecting member fixing plate 3 are surrounded. It is set as the structure filled with the filling concrete 6 in the web insertion part 24 which becomes. In this case, when filling the filled concrete 6 into the steel shell composed of the joint plate 5, the main beam 1, and the skin plate 2, a narrow gap is formed so that each web 17 of the connecting member can be inserted. Filled with stuffed concrete 6. Further, when the axial force does not dominate, as shown in FIGS. 14 and 15, it is possible to leave the core insertion concrete in the web insertion portion 24 and leave it as a cavity. In this case, as shown in the figure, an inside-filled concrete boundary plate 15 is provided in the steel shell, and a cavity is left so that the inside-filled concrete 6 does not go around the web insertion portion 24. By doing in this way, the labor of processing the opening for inserting the web 17 of the connecting member can be omitted.

  22 and 23 show still another embodiment. According to this embodiment, it is possible to realize a joint strength equal to positive bending and negative bending in the segment girder height direction. In the joint structure of FIG. 23, the connecting member fixing plates 3 are provided on both the inner edge side and the outer edge side of the segment 20. Further, the web 17 of the T-shaped connecting member 7 having the same shape is inserted from the connecting member inserting opening 4 opened in the connecting member fixing plate 3 on the inner edge side and the outer edge side, and the tip 18 thereof is connected to the other connecting member. Insert into the insertion opening 4. In order to achieve the above-described configuration, the connecting member insertion opening 4 is provided with an opening width that allows the two webs 17 to be inserted simultaneously. Further, the connecting member fixing plate 3 and the flange 19 of the T-shaped connecting member 7 are friction-joined by the bolt 9 and the nut 28. By configuring in this way, the inner and outer sides have substantially the same structure with the cross-section neutral shaft interposed therebetween, and it is possible to realize joint strength equal to positive bending and negative bending in the segment girder height direction. The said form is suitable when the bending load which acts on a segment joint part is large, since the flange 19 of the two T-shaped connection members 7 is arrange | positioned at the segment beam height direction both ends.

  Moreover, when the bending load which acts on a segment coupling is not large, it is good also as a structure shown in FIG. In this case, the connecting member fixing plates 3 are provided on both the inner edge side and the outer edge side of the segment. Then, the web 17 of the T-shaped coupling member 7 having the same shape is inserted from the coupling member insertion opening 4 opened in each coupling member fixing plate 3, and the web 17 of the T-shaped coupling member 7 inserted from the inner edge side. And the tips 18 of the webs 17 of the T-shaped connecting member 7 inserted from the outer edge side are butted together. Further, the connecting member fixing plate 3 and the flange 19 of the T-shaped connecting member 7 are friction-joined with bolts 9. By comprising in this way, a joint part becomes a symmetrical structure on both sides of a cross-section neutral axis | shaft, and can implement | achieve equal joint yield strength with respect to positive bending and negative bending in a segment girder height direction.

  In the configuration shown in FIG. 22 and FIG. 23, a filler 27 such as mortar is filled between the flanges 19 of the adjacent T-shaped connecting members 7 so as to fill a space formed there. Thereby, the level | step-difference part formed between the flange 19 of the T-shaped connection member 7 and the connection member fixing plate 3 is eliminated, and external flatness is ensured.

  22 and 23, the web 17 of the T-shaped connecting member 7 is inserted into the connecting member insertion opening 4a of the joint plate 5 from both the inner edge side and the outer edge side of the segment 20. For this reason, the joint plate 5 is divided by the connecting member insertion opening 4a. However, the web 17 and the flange 19 of the T-shaped connecting member 7 having a large cross-sectional rigidity are disposed across the adjacent segments in the circumferential direction. Thus, high rigidity and high yield strength of the joint portion are sufficiently ensured.

  The present invention can be applied to a joint portion when a flat segment constituting a box culvert or the like is assembled. In addition, it is preferable that the embodiment be appropriately modified.

It is a perspective view of a segment joint part concerning an embodiment of the present invention. It is AA sectional drawing of FIG. It is a top view of FIG. It is a top view of a connection member fixing plate. It is a perspective view of a T-shaped connection member. It is a perspective view of an L-shaped connection member. FIG. 10 is a cross-sectional view of a segment joint portion using a plurality of web-integrated connecting members in which a plurality of webs are provided on the wide flange shown in FIG. 9 as another embodiment. FIG. 8 is a plan view of FIG. 7. It is a perspective view of the connection member of the example which provided the bolt insertion hole of the multiple web integral type and the single row. It is a top view of the connection member fixing plate combined with the connection member integrated with a plurality of webs. It is a perspective view of the connection member of the example which provided the multiple row | line | column integral type and the multiple rows bolt insertion hole. It is a perspective view of the segment joint part before mounting of a connecting member when filling concrete into the connecting part. It is a front view of the joint board in FIG. It is a perspective view of the segment joint part before connecting member mounting in the case of not filling the connecting part with concrete. FIG. 15 is a plan view of FIG. 14. It is a perspective view of a filling concrete boundary board. It is a perspective view of a connection member receiving material. It is a perspective view of the aspect which fitted the web of the connection member in the groove | channel of the connection member receiving material. It is a top view of the segment joint part which combined the web of the connection member of FIG. 20, and the connection member receiving material of FIG. It is a perspective view of the flange of the connection member which has a female screw at the front-end | tip. It is a perspective view of the connection member receiving material which has a bolt insertion hole. As another embodiment, it is a cross-sectional view of a segment joint portion in which a connecting member that is symmetrical from the inner edge side and the outer edge side of the segment with the cross-section neutral axis interposed therebetween is inserted into the insertion portion. It is sectional drawing of the segment coupling part of the aspect which inserted the connection member of the same shape into the insertion part from the inner edge side and outer edge side of a segment as other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main girder 2 Skin plate 3 Connecting member fixing plate 4 Connecting member insertion opening 4a provided on the connecting member fixing plate Connecting member insertion opening 5 provided on the connecting plate Joint plate 6 Filled concrete 7 T-shaped connecting member 8 Connecting member receiving material 9 Bolt 10 Bolt insertion hole 11 Water stop material 12 L-shaped connecting member 13 Connecting member integrated with multiple webs 14 Seat facing 15 Filled concrete boundary board 16 Connecting member positioning groove 17 Connecting member web 18 Connecting member Web tip 19 Connecting member flange 20 Segment 21 Recess 22 Female screw 23 Water stop material mounting groove 24 Web insertion part 25 One end edge 26 Other end edge 27 Filler 28 such as mortar Nut

Claims (10)

In the connecting structure of the segments of the structure constructed by connecting a plurality of segments formed by filling concrete in the steel shell in the circumferential direction and the axial direction,
The connecting member fixing plate is fixed to the main girder of the segment and the joint plate, the joint plates of the segments adjacent in the circumferential direction are butted together, and the connecting member insertion opening provided in each connecting member fixing plate The connecting member web is inserted into the connecting member insertion opening provided in each joint plate from one or both of the inner edge side and the outer edge side of the segment, and the flange of the connecting member is rubbed against the connecting member fixing plate with a bolt. Segment connection structure characterized by joining.   2. The segment according to claim 1, wherein the connecting member comprises a T-shaped connecting member, an L-shaped connecting member, or a connecting member having a plurality of webs formed by providing a plurality of webs on a wide flange. Connected structure.   The segment connection structure according to claim 1, wherein a shape steel is used for the connection member. The segment connection structure according to any one of claims 1 to 3, wherein a water stop material is adhered to an inner surface of the flange of the connection member on the side in contact with the connection member fixing plate. A connecting member receiving material is fixed to the inside of the skin plate of the segment, and the web tip of the connecting member inserted from the connecting member insertion opening of the connecting member fixing plate provided on the inner edge side of the segment is connected to the connecting member. The segment connecting structure according to any one of claims 1 to 4, wherein the connecting structure is in contact with a receiving member.   The segment connecting structure according to claim 5, wherein a web tip of the connecting member is engaged with a positioning groove for the connecting member in the connecting member receiving member.   The front end of the web of the connecting member is engaged with a positioning groove for the connecting member in the connecting member receiving member, and the front end of the web and the connecting member receiving member are bolted together. Linked structure of the segments described. The connecting member fixing plates are provided on the inner edge side and the outer edge side of the segment, and the webs of the connecting members having the same shape are inserted into the connecting member insertion openings of the connecting member fixing plate from the inner edge side and the outer edge side of the segment. coupling structure of a segment according to any one of claims 1 to 4 of the tip, characterized in that inserted into the connecting member insertion opening provided in the connecting member fixed plate of the mating.   The connecting member fixing plates are provided on the inner edge side and the outer edge side of the segment, and the webs of the connecting members having the same shape are inserted into the connecting member insertion openings of the connecting member fixing plate from the inner edge side and the outer edge side of the segment. The segment connecting structure according to any one of claims 1 to 4, characterized in that the tip of the web is butted against the tip of the mating web.   The web insertion part of the connecting member surrounded by the main girder, skin plate, joint plate and connecting member fixing plate is hollow, or is filled with filling concrete by forming a gap for inserting the web The segment connection structure according to any one of claims 1 to 9.

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