JP2006307531A - Connection structure of segment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure of segments having the same high rigidity and high strength as those of a segment body, requiring less construction cost and labor, and capable of securing the flatness of the surface of the segments. <P>SOLUTION: In this connection structure of the segments in a structure constructed by circumferentially and axially connecting the plurality of segments to each other, a male side connection member 4 is fixed to the circumferential one end part of the segment body 1 so as to be projected in the circumferential direction and a male side connection member 3 is fixed to the circumferential other end part of the segment body 1 so as to cover the outer surface of the male side connection member 4. The male side connection member 4 is fitted to the female side connection member 3, and both connection members are connected to each other with bolts 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

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, in a concrete segment, as a joint structure for increasing the strength and rigidity of both the segment main body and the joint portion, a connection groove portion having a substantially lip groove cross section is provided at both ends in the circumferential direction of the segment main body. A segment connection structure is disclosed in which a joining key is inserted from the segment surface direction (tunnel axis direction) across the connection groove portions of segments adjacent in the circumferential direction. In this segment connection structure, the joint metal fittings installed at the end of the segment are bolted directly to the side surface of the steel member end with a plurality of mounting bolts, and the joint metal fittings are made of ductile cast iron. The rigidity can be improved. 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, a plurality of short bolts that penetrate the joint plate in the circumferential direction of the tunnel, A joint structure is disclosed in which a joint plate and a plurality of high-strength bolts penetrating in the axial direction of the tunnel are respectively joined. 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 relates to a joint of a composite segment that is effective when a large bending moment or tensile force acts such as a large cross section, a large depth, or an underground river, and the joint portion has the same strength and rigidity as the segment body. A structure is disclosed. 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.

In Patent Document 4, an H-shaped member made of H-shaped steel or a plate and a cut T which are in contact with each other at the end of a segment is attached, and a joint is connected with a connecting bolt penetrating the four flanges of this H-shaped member. A fastening segment joint structure is disclosed. This joint structure also has an advantage of having sufficient strength corresponding to tension and bending.
JP-A-8-184296 JP 2000-80892 A Japanese Patent Laid-Open No. 7-62988 Japanese Patent Laid-Open No. 10-339099

  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, in order to increase the bending strength of the joint, in order to increase the cross-sectional secondary moment in the segment joint portion, it is necessary to use an extremely thick web, 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.

  Moreover, in the connection structure of the segment currently disclosed by patent document 2, since a joint plate is moved horizontally within a segment and it bridges with the adjacent segment to connect, it cannot apply when concrete is laid inside. . 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 fasten the joint, the joint must be fastened from the inside of the segment. When concrete is placed in the segment, the joint cannot be fastened.

The present invention connects a male joint and a female joint having a flange portion so that the joint portion can withstand bending load in addition to the joint portion having the same high rigidity and proof stress as the segment body. An object of the present invention is to provide a segment connecting structure that solves the conventional problems by having a simple configuration and a configuration in which the joint portion is configured to be able to ensure flatness of the segment body without traveling outside the surface of the segment body. And

  The inventor has solved the above-described problems, and [1] further improved the strength of the joint portion of the segment, [2] improved resistance to bending load acting on the joint portion, [3] simplified structure, 3) Improvement in workability, [4] In order to improve water-stopping performance, the male side connecting member is fixed to one end of the segment body in the circumferential direction so as to jump out in the connecting direction, and the other end in the circumferential direction. The female side connecting member that covers the outer surface of the male side connecting member is fixed, the male side connecting member is fitted to the female side connecting member, and the fitting portions of both the connecting members are connected to each other by bolting. Invented the connected structure of the segment.

That is, the first invention is a connecting structure of the segments in a structure constructed by connecting a plurality of segments in the circumferential direction and the axial direction, and a male-side connecting member at one end in the circumferential direction of the segment body. Is protruded in the circumferential direction, and a female side connecting member capable of covering the outer surface of the male side connecting member is fixed to the other end portion of the segment body in the circumferential direction. The connecting member is fitted into the female side connecting member, and both the connecting members are bolted.
A second invention is the box according to the first invention, wherein the female side connecting member has an outer peripheral surface substantially equal to the dimensions of the segment body in the width direction and the digit height direction, and opens toward the male side connecting member. It is composed of a shape connecting member and is fixed to the joint plate by welding.
According to a third invention, in the first invention, the female-side connecting member is configured by projecting a segment main girder made of C-shaped steel from a circumferential end of the segment body.
According to a fourth invention, in the first to third inventions, the male side connecting member is constituted by fixing a plurality of H-shaped steels to a joint plate.
5th invention is the 1st-3rd invention. The male side connection member fitted by the female side connection member is a segment main body, or several H-section steel formed by adhering to a joint board, or a segment main beam A plurality of H-section steels protruding from the circumferential ends of the plurality of H-section steels are provided at intervals in the segment width direction, and spanned across the flanges of the plurality of H-section steels so as to be positioned at the opposing flange intervals of the female side connecting member. It is characterized by the construction of a flange plate material.
A sixth invention is characterized in that, in the first to fifth inventions, shape steel is used for the female side connecting member and the male side connecting member.
7th invention is the front end surface of the female side connection member in 1st-6th invention, Comprising: The surface which can contact the circumferential direction end surface of the segment main body which attaches a male side connection member, or the circumferential direction of a segment main body A water-stop material is disposed on an end surface on which the front end surface of the female-side connecting member can come into contact.
According to an eighth aspect of the present invention, in the first to seventh aspects of the present invention, a hairpin that penetrates the web of the female side coupling member and the male side coupling member in the width direction of the segment is provided, and the hairpinning material is prevented from coming out of the through hole. The hairpin fixing material is fixed to the female connecting member.
According to a ninth aspect, in the eighth aspect, the hairpin through bar provided in the hairpin fixing member is inserted into the insertion hole of the hairpin protruding from the web of the female side connecting member and the male side connecting member. Features.
According to a tenth invention, in the first to ninth inventions, concrete is contained in a space portion surrounded by the female side connection member and the male side connection member, and a space portion surrounded by the hairpin fixing material and the female side connection member. It is characterized by being cast.

  According to the present invention, the male side connecting member is fixed to one end of the segment body in the circumferential direction so as to protrude in the circumferential direction, and the outer surface of the male side connecting member is attached to the other end of the segment body in the circumferential direction. Since the female side connecting member is fixed so as to cover, the male side connecting member is fitted to the female side connecting member, and the joint portion is formed by bolting both the connecting members. Can be fastened, and it is not necessary to process the inside of the segment because the connecting member is simply attached to the joint portion outside the segment body. Further, the male side connecting member and the female side connecting member can cooperate to exhibit the same rigidity and proof stress as the segment main body, can strongly resist the tensile and bending loads acting on the joint portion, and has a simple structure. Furthermore, since the male side connecting member and the female side connecting member can be accommodated within the outer shape of the segment, there is no unevenness in the out-of-plane direction, and the flatness of the joint portion can be ensured. Thus, this invention can implement | achieve the connection structure of the segment joint part excellent in workability compared with the past.

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

  1 and 2 show Embodiment 1 in which a synthetic segment 1a filled with concrete in a steel shell (the main girder and skin plate are omitted) is connected in the circumferential direction via a joint portion 2, and FIG. 1 shows the circumferential direction. FIG. 2 is a perspective view showing a mode before connecting the joint portions of the segment 1a facing each other, and FIG. 2 is a cross-sectional view showing a mode after connecting the joint portions. The joint portion 2 is composed of a female side connecting member 3 attached to one end of the segment body 1 in the circumferential direction and a male side connecting member 4 attached to the other end portion in the circumferential direction. The specific configuration of the connecting member 4 is different in each embodiment. The female side connecting member 3 of the first embodiment is configured by a box-shaped connecting member 5, and the male side connecting member 4 is configured by an H-shaped connecting member 6.

  The box-shaped connecting member 5 provided at one end in the circumferential direction of the segment body 1 is made of a steel plate that surrounds the four sides of the upper, lower, left, and right sides, opens toward the male connecting member 4, and the rear surface is a joint plate 7. Closed. Moreover, the box-shaped connection member 5 has an outer peripheral surface equal to the dimension of the segment main body 1 in the width direction and the digit height direction, and is attached to the joint plate 7 by welding. In order to ensure the flatness of the segment in the welded portion, it is preferable to secure the flat surface of the segment outer shape after welding by cutting the welded portion with a grinder.

  The H-shaped connecting member 6 provided at the other end in the circumferential direction of the segment main body 1 is configured by using a plurality of H-shaped steel cut into short pieces, and the rear end surface of the H-shaped steel is connected to the joint plate 7 of the segment main body 1. , And welded at intervals in the segment width direction (tunnel axis direction). The H-shaped connecting member 6 adjusts the thicknesses of the flange 6 a and the web 6 b in order to ensure the same tension and bending strength as the segment body 1 in the joint portion 2. Incidentally, it is preferable to increase the thickness of the flange 6a in order to realize an H-shaped joint having a high yield strength at a low cost with the same amount of steel.

  The H-shaped connecting member 6 is inserted from the opening on the front surface of the opposing box-shaped connecting member 5 so that there is no backlash in the hollow portion 8, and for this purpose, the upper and lower flanges 6 a are connected to the box-shaped connecting member 5. The dimensions are controlled along the inner surfaces of the upper and lower flanges 5a.

  In order to connect the joint portions 2 by bringing the segment bodies 1 facing each other in the circumferential direction close to each other, the H-shaped connecting member 6 is fitted into the box-shaped connecting member 5 and the joining bolt 10 is inserted into the overlapping portion of both members. And connect. For this purpose, the box-shaped connecting member 5 and the H-shaped connecting member 6 are fitted in the proper positions, and the bolt insertion holes 11 penetrating both members inside and outside are connected to the upper and lower flanges 5a of the box-shaped connecting member 5 and the H-shaped connection. Opened in the upper and lower flanges 6 a of the member 6. It is preferable to provide a counterbore 11a in the bolt insertion hole 11 of the flange 5a of the box-shaped connecting member 5 so that the bolt head does not jump out of the surface. Further, in order to insert the joining bolt 10 into the bolt insertion hole 11 and screw and fix the tip, a nut 12 is attached in advance to the inside of the bolt insertion hole of the upper and lower flanges 6a of the H-shaped connecting member 6 by welding. When a tap (screw hole) is provided in the upper and lower flanges 6a of the H-shaped connecting member 6, no nut is required.

  In the above configuration, the opposing segments 1a are brought close to each other in the circumferential direction, and the H-shaped connecting member 6 is fitted to the back of the box-shaped connecting member 5, and then the joining bolt 10 is inserted into the bolt insertion holes 11 of both members. By screwing onto the nut 12, the segment 1 a can be connected in the circumferential direction at the joint portion 2.

  In the first embodiment, since the box-shaped connecting member 5 and the H-shaped connecting member 6 made of steel are fitted to each other to form the joint portion 2, a plurality of tensile loads acting on the joint portion 2 are provided. Since the box-shaped connecting member 5 and the H-shaped connecting member 6 are engaged with each other by a sufficient amount to counter the bending load, the joint portion 2 is the segment body 1. High yield strength and high rigidity can be secured. Further, the box-shaped connecting member 5 and the H-shaped connecting member 6 can be reduced in cost by using shape steel. Further, instead of the H-shaped connecting member 6, a C-shaped connecting member obtained by cutting a C-shaped steel into short pieces may be used.

  In the first embodiment, it is preferable to install a plurality of H-shaped connecting members 6 at predetermined intervals in order to disperse the load in the segment width direction. However, if the number of H-shaped connecting members 6 is large, the processing labor is increased, so it is best to attach two places on both sides in the segment width direction.

  Moreover, it is good to give an anticorrosion process to the outer surface of the box-shaped connection member 5 as needed. Also, when the compressive force is excellent in the circumferential direction of the segment and the counter force is insufficient with only the steel material of the box-shaped connecting member 5 and the H-shaped connecting member 6, a concrete injection hole is provided in a part of the box-shaped connecting member 5, After the segment joint portions are connected, concrete is placed from the injection hole into the space portion in the connecting member so that it can resist the compressive force.

  Further, in the first embodiment, when the H-shaped connecting member 6 is fitted to the box-shaped connecting member 5 to the correct position, a gap is generated at a portion where the edges of both members abut. In order to seal the gap in a watertight manner, a water stop material installation groove is provided on the end surface 13 of the box-shaped connecting member 5 and the water stop material is attached thereto to improve the water stop performance of the joint portion 2. be able to. Or the groove | channel for water-stop material installation may be provided in the position of the joint board 7 which the end surface 13 of the box-shaped connection member 5 contacts, and a water-stop material may be attached there. Furthermore, it is preferable to attach a water stop rubber to the neck of the joining bolt 12 in order to ensure water stop at the bolt insertion part.

  3 to 5 show the second embodiment. In the second embodiment, the two C-shaped connecting members 14 cut in a short length are attached to the front surface of the joint plate 7 and attached to both side portions in the segment width direction so that the groove portions are opposed to each other. Is configured. The C-shaped connecting member 14 is disposed on the joint plate 7 so that the outer surface of the flange 14a is equal to the segment surface (segment main girder height) and the outer surface of the web 14b is equal to the segment main girder surface. Installed by welding.

  Further, in the male side connecting member 3 of the second embodiment, a plurality of H-shaped connecting members 6 cut into short sizes are fixed to the joint plate 7 by welding, and the flange plate 15 is welded between the both connecting members 6. Make up by adhering. The outer surfaces of the upper and lower flanges 6 a of the H-shaped connecting member 6 are provided by adjusting the height along the inner surface of the flange 14 a of the C-shaped connecting member 14. Further, the flange plate member 15 provided so as to connect the flanges of the H-shaped connecting member 6 on both sides is attached to the upper and lower flange outer surfaces of the H-shaped connecting member 6 by welding or bolts. The plate thickness of the flange plate 15 is such that when the H-shaped connecting member 6 is fitted to the C-shaped connecting member 14, the upper and lower flange outer surfaces of the C-shaped connecting member 14 and the outer surface of the flange plate 15 are flat. Thus, the plate thickness is set equal to the thickness of the flange 14a of the C-shaped connecting member 14, and the length of the flange plate 15 is the distance between the end faces of the flanges of the C-shaped connecting member 14 on both sides facing the width direction of the segment. It is adjusted to be approximately equal to the dimension.

  In Embodiment 2, by making the opposing segments 1a close to each other in the circumferential direction, one side portion of the upper and lower flanges 6a of the H-shaped connecting member 6 is fitted to the inner surface of the flange 14a of the C-shaped connecting member 14, and the flange plate material Both ends of 15 are in contact with the inner edge of the flange 14 a of the C-shaped connecting member 14. At this time, the joining bolt 10 is inserted into the bolt insertion hole 11 provided in the flange 14 a of the C-shaped connecting member 14 and the flange 6 a of the H-shaped connecting member 6, and fastened to the inner nut 12. The C-shaped connecting member 14 can be firmly connected, and the joint portion 2 can be prevented from protruding in the out-of-plane direction of the segment 1a. Also in the second embodiment, the watertight sealing of the gap at the portion where the male side connecting member 3 and the female side connecting member 4 abut may be performed using the same water stopping means as in the first embodiment.

  6 to 10 show the third embodiment. In the third embodiment, the female side connecting member 3 is made to project the main girder 16 made of C-shaped steel disposed on both sides in the width direction of the segment body 1 integrally from the circumferential end of the segment body 1. The C-shaped connecting member 17 is configured. In this case, in order to extend the C-shaped connecting member 17 also serving as the main girder in the direction of the male side connecting member 4 that passes through the joint plate 7 and is opposed thereto, You may make it provide the notch part 18 as shown in FIG. 7 used as the level | step difference shape where the inner surface of the C-shaped connection member 17 follows.

  Moreover, the male side connection member 4 of Embodiment 3 is made integral with the main girder 16a by allowing the joint plate 7 to penetrate the main girder 16a made of H-shaped steel located inside the segment body 1 and projecting outward. An H-shaped connecting member 19 is provided, and a flange plate member 15 is provided so as to connect between the flanges 19a of the H-shaped connecting member 19 also serving as a main girder located on both sides in the segment width direction. In the third embodiment, the joint plate 7 through which the H-shaped connecting member 19 also serving as a main girder passes may be configured as shown in FIG. 9 or FIG. In FIG. 9, the joint plate 7 is divided into an inner divided joint plate 7a and an outer inner divided joint plate 7b, and the upper and lower flanges 19a of the H-shaped connecting member 19 also serving as the main girder are inserted into the divided joint plates 7a and 7b. The concave portion 20 is formed and disposed so that the H-shaped connecting member 19 is sandwiched between the two split joint plates 7a and 7b, and the through portion is welded to the groove. In FIG. 10, the joint plate 7 is provided with an H-shaped through hole 21 through which the H-shaped connecting member 19 can penetrate the plate surface.

  In the third embodiment, the plate thickness of the flange plate member 15 is set to the flange thickness of the C-shaped connecting member 14 so that the upper and lower flange outer surfaces of the H-shaped connecting member 19 also serving as the main girder and the outer surface of the flange plate member 15 are flat. The length of the flange plate member 15 is made equal to the length between the flanges 14a of the C-shaped connecting members 14 attached to both sides in the segment width direction, and this point is the same as in the second embodiment. And the segment 1a which opposes the circumferential direction with the joining bolt 11 can be connected firmly using the female side connection member 3 and the male side connection member 4 of Embodiment 3, and the joint part 2 does not protrude to the outer surface of a segment. In addition, the female side connection member 3 and the male side connection member 4 of Embodiment 2 and Embodiment 3 may change a combination mutually, and may comprise a coupling part.

  11 to 13 show a fourth embodiment. In this Embodiment 4, the joint part 2 is comprised from the female side connection member 3 and the male side connection member 4, the hairpin 22 and the hairpin fixing material 23. More specifically, the female-side connecting member 3 is configured by attaching two C-shaped connecting members 14 cut into short sizes to both side portions of the joint plate 7 in the segment width direction with the groove sides facing each other. The web 14b of the C-shaped connecting member 14 is provided with a plurality of hair material insertion holes 24, and the upper and lower flanges 14a are provided with bolt insertion holes 11.

  The hairpin fixing material 23 is formed by forming a hairpin fixing web 25 on one side of the substantially L-shaped piece and providing a hairpin through bar 26 in parallel with the web 24, and a bolt insertion hole in the hairpin fixing flange 27. 11 is provided. At both ends of the hairpin 22, holes 28 for the hairpin through bar are provided. Both ends of the hairpin 22 pass through the hairpin insertion holes 24 of the opposing C-shaped connecting member 14. At this time, the penetration hole 28 for the hairpin is provided so as to protrude to the outside of the web 14a. Although the structure of the male side connection member 4 is substantially the same as the structure shown in FIG. 5, the web is provided with a hair material through-hole 24 so that the hair material can penetrate.

  In Embodiment 4, the coupling part 2 is connected by the following procedure. First, by making the opposing segments 1a close to each other in the circumferential direction, one side portion of the upper and lower flanges of the H-shaped connecting member 6 is fitted to the inner surface of the flange of the C-shaped connecting member 14, and both end portions of the flange plate 15 are It contacts the inner edge of the flange of the C-shaped connecting member 14. Next, the hair material 22 is inserted into the hair material insertion hole 24 of the web 14 b of the C-shaped connection member 14 and the hair material insertion hole 24 provided in the web 6 a of the H-shaped connection member 6. Thereafter, the hairpin penetrating bar 26 is inserted into the hole 28 for the hairpin penetrating bar protruding from the web 14 b of the C-shaped connecting member 14. At this time, both ends of the hairpin 22 are locked to the inner surface of the hairpin fixing web 25.

  Further, since the hairpin fixing flange 27 rides on the upper flange 14a of the C-shaped connecting member 14, the joining bolt 10 is inserted into the bolt insertion hole 11 provided in both members, and screwed into the nut 12 inside the upper flange 14a. To do. Moreover, it is preferable to ensure the flatness of the segment joint portion by filling a space surrounded by the hairpin fixing web 25 and the hairpin through bar 26 with a mortar 29 or the like.

  In the fourth embodiment, since the C-shaped connecting member 14 and the H-shaped connecting member 6 are connected not only by the joint bolt 12 but also by the hairpin 22, if the bearing strength is insufficient only by the support bearing of the bolt, both The joint portion 2 made of a member can secure the same high rigidity and high yield strength as the segment main body by reinforcing with a hairpin against tensile and bending loads.

  Further, in order to effectively increase the tensile strength of the joint portion 2 by the hairpins 22, it is preferable that the hairpins 22 are arranged so as to be bent in the strong axis direction. Moreover, in order to make the hairpin penetrating bar 26 work effectively in terms of strength, bending is applied in the strong axis direction as shown in FIGS. 12 (a) to 12 (c) rather than in FIGS. It is preferable to arrange in such a manner. Further, as shown in FIGS. 16A to 16C or 16D to 16F, the tip of the hairpin penetrating bar 26 is provided in a tapered shape 30 so that the tip of the hairpin penetrating bar hole 28 is formed. Insertion operation becomes easy.

  Further, as shown in FIG. 14, the lid plate 35 is preferably attached to the lower flange 14 b of the C-shaped connecting member 14 with bolts 31 so as to close the gap between the tip of the hairpin fixing web 25 and the hairpin through bar 26. . The cover member 35 is provided with a seat so that the head of the bolt 31 does not jump out of the plane. At this time, a flat surface is formed by the upper flange 27 of the hairpin fixing member 23, the upper flange 6a of the H-shaped connecting member 6, the cover plate 35, the lower flange 6a of the H-shaped connecting member 6, and the outer surface of the segment 1a. Provide to do. Moreover, when providing the cover plate 31, it is not necessary to fill the interior space with mortar.

  Further, as shown in FIG. 15, the hairpin through bar 26 can be omitted, and in this case, the hole 28 for the hairpin through bar can also be omitted. When the hairpin penetrating bar 26 is not required, both ends of the hairpin 22 are locked to the inner surface of the fixing web 25 of the hairpin fixing member 23 fixed to the C-shaped connecting member 14 with the joining bolt 10.

  The present invention can be applied to a joint portion in the case where flat segments constituting a box culvert or the like are assembled by a shaft. In addition, the design of the embodiment may be changed as appropriate.

In the segment connection structure according to Embodiment 1, it is a perspective view showing a mode before connecting a female side connection member and a male side connection member facing each other in the circumferential direction. It is sectional drawing which shows the aspect after connecting the female side connection member and the male side connection member. In the segment connection structure according to Embodiment 2, it is a perspective view showing an aspect before connecting a female side connection member and a male side connection member facing each other in the circumferential direction. It is sectional drawing which shows the aspect after connecting the female side connection member and the male side connection member. It is a front perspective view of the male side connection member of FIG. In the segment connection structure according to Embodiment 3, it is a perspective view showing an aspect before connecting a female side connection member and a male side connection member facing each other in the circumferential direction. It is a perspective view of the joint board shown in FIG. It is a front perspective view of the male side connection member of FIG. It is a perspective view of the division | segmentation coupling plate shown in FIG. It is a perspective view of the integrated joint board changed into FIG. It is a perspective view before the joint part connection of the segment using a hairpin. (A) is a front view of the first example of the hairpin fixing material, (b) is a cross-sectional view taken along line AA of (a), (c) is a perspective view, and (d) is a hairpin fixing material. The front view of a 2nd example, (b) is BB sectional drawing of (a), (c) is a perspective view. It is sectional drawing of the joint part of the segment using a hairpin. It is sectional drawing of the other example of the joint part of the segment using a hairpin. It is sectional drawing of the further another example of the joint part of the segment using a hairpin. (A) is a front view of a third example of the hairpin fixing material, (b) is a cross-sectional view taken along the line CC of (a), (c) is a perspective view, and (d) is a hairpin fixing material. Front view of 4th example, (b) is DD sectional drawing of (a), (c) is a perspective view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Segment main body 1a Segment 2 Joint part 3 Female side connection member 4 Male side connection member 5 Box-shaped connection member 6 H-shaped connection member 6a Upper flange 6b Lower flange 7 Joint plate 7a Inner divided joint plate 7b Outer divided joint plate 8 Hollow part DESCRIPTION OF SYMBOLS 10 Joint bolt 11 Bolt insertion hole 11a Counterbore 12 Nut 13 End surface 14 C-shaped connection member 14a Upper flange 14b Lower flange 15 Flange board material 16 Main girder
16a Main girder 17 C-shaped connecting member 18 Notch portion 19 H-shaped connecting member 19a Upper flange 19b Lower flange 20 Recess 21 Through hole 22 Hairpin material 23 Hairpin material fixing material 24 Hairpin material insertion hole 25 Hairpin material fixing web 26 Hairpin material penetration Bar 27 Hairpin fixing flange 28 Hairpin through-hole 29 for mortar 30 Tapered portion 31 Bolt

Claims (10)

A connecting structure of the segments in a structure constructed by connecting a plurality of segments in the circumferential direction and the axial direction,
A female-side connecting member is provided with a male-side connecting member protruding in the circumferential direction at one end of the segment body in the circumferential direction, and can cover the outer surface of the male-side connecting member at the other end in the circumferential direction of the segment body. A connecting structure for segments, wherein a connecting member is fixed, the male connecting member is fitted into a female connecting member, and both connecting members are bolted together. The female-side connecting member has an outer peripheral surface substantially equal to the dimensions of the segment body in the width direction and the digit height direction, and is configured by a box-shaped connecting member that opens toward the male-side connecting member. The segment connection structure according to claim 1, wherein the segment connection structure is fixed to the segment. The segment connection structure according to claim 1, wherein the female side connection member is configured by projecting a segment main girder made of C-shaped steel from a circumferential end of the segment body.   The segment connecting structure according to any one of claims 1 to 3, wherein the male side connecting member is configured by fixing a plurality of H-shaped steels to a joint plate. The male side connecting member fitted to the female side connecting member according to claim 3 is formed by projecting a plurality of H-shaped steels fixed to the joint plate, or a segment main girder from a circumferential end of the segment body. A plurality of H-section steels are provided at intervals in the segment width direction, and a flange plate material is constructed over the flanges of the plurality of H-section steels so as to be positioned at the opposing flange spacing of the female-side connecting member. The segment connection structure according to any one of claims 1 to 3, wherein:   The segment connecting structure according to any one of claims 1 to 5, wherein a shape steel is used for the female side connecting member and the male side connecting member. A front end surface of the female side connecting member, which is a surface on which the circumferential end surface of the segment main body to which the male side connecting member is attached can be contacted, or a circumferential end surface of the segment main body, wherein the front end surface of the female side connecting member is The segment connection structure according to any one of claims 1 to 6, wherein a water-stopping material is disposed on the abuttable surface.   A hairpin that penetrates the web of the female coupling member and the male coupling member in the width direction of the segment is provided, and the hairpin fixing material that prevents the hairpin from coming out of the through hole is fixed to the female coupling member. The segment connecting structure according to any one of claims 1 to 7.   The segment of the segment according to claim 8, wherein the hairpin penetrating bar provided in the hairpin fixing member is inserted into the insertion hole of the hairpin protruding from the web of the female side connecting member and the male side connecting member. Connection structure.   The concrete is cast in a space part surrounded by the female side connection member and the male side connection member and a space part surrounded by the hairpin fixing material and the female side connection member. The segment connection structure according to any one of 9.

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