KR101148218B1 - Joint device of civil construction - Google Patents

Abstract

The present invention effectively prevents the occurrence of cracks in the civil engineering structures by the clamping force of the bolts when joining the joints with bolts to join the civil engineering structures.

The bolt insertion part (fastening part 15) which has the bolt hole 15a, the support parts 16 and 16 which protruded on both sides of the outer peripheral part of the bolt insertion part 15, and the tip part of each support part 16 and 16 are provided. In the joint head 18 provided with the anchor column mounting portion 17, the anchor column 19 is coupled to and installed in the anchor column mounting portion 17 to form a joint 14, and the joint 14 is connected. A buffer zone 20 composed of a gap is provided in front of the head 18 and embedded in the segment 11. The stress of the buried portion of the joint head 18 in the segment 11 is suppressed by the fastening force of the bolt 22 which fastens the joint 14 by the buffer zone 20.

Description

Joint device of civil construction

1 is a cross-sectional view showing a first embodiment of a joint apparatus of a civil engineering structure according to the present invention.

FIG. 2 is a II-II cross-sectional view of FIG. 1.

3 is a cross-sectional view taken along the line III-III of FIG. 1.

4 is a perspective view showing a civil structure to which the joint device of the civil structure according to the present invention is applied.

5 is a cross-sectional view showing a second embodiment of the joint apparatus of the civil engineering structure according to the present invention.

6 is a cross-sectional view showing an example of a joint device of a conventional segment.

<Description of the symbols for the main parts of the drawings>

10, 30: joint device of civil structure

11, 34: Segment (civil structure)

11d, 34c: joint surface

12, 13: Bolt box

14: seam

15: Bolt insertion part (fastening part)                 

15a: Bolt hole

16 support

17: anchor pillar mounting portion

18: seam head

19, 32: anchor column

20, 35: buffer area

21, 36: buffer member

22, 37: Bolt

23: nuts

31: fastening part

31a: screw hole

33: seam (insert nut)

The present invention relates to a joint device for civil engineering structures for joining civil engineering structures, such as segments, slabs, walls, bridge structures, etc., for example, concrete segments used for ventilating shielded tunnels.

Conventionally, as a joint apparatus for joining these types of civil engineering structures, the joint apparatus of the segment shown in FIG. 6 is known, for example. The joint device is provided with reinforcing bar connections 4 on both sides of the cylindrical bolt insertion portion 2 having the bolt holes 1 through the supporting section 3, and rod-shaped anchor columns on the reinforcing bar connections 4. The joint 6 of the structure which connected (5) exposes the front end surface 2a of the said bolt insertion part 2 to the joint surface Sa of the segment S to the joint part of the segment S, The anchor pillars 5 and 5 are embedded in the state in which both sides of the bolt box H of the segment S are positioned. When joining adjacent segments, both segments S and S are bolted through. The bolts of the bolt insertion portions 2 and 2 are bolted from the bolt box H of one segment S provided to each segment S and S in a state where the axes of (2, 2) coincide with each other. By inserting the bolt (7) into the holes (1, 1), and screwing and tightening the nut (8) inserted from the bolt box (H) of the other segment (S) to the bolt (7), It is bonded to a segment (S, S).

In addition, Japanese Unexamined Patent Application Publication No. 2-109894 (paragraphs 1 to 2, Figs. 4 to 5) includes a main body plate 16, a support plate 17, and anchor reinforcing bars 18 embedded in the concrete body 10. , Concrete structures that can be bolted at the joint surface are described.

However, in the joint device of the conventional segment as shown in Fig. 6, if the bolt 7 inserted through the bolt insertion part 2 and the nut 8 screwed thereto are too tight, the bolt insertion is performed. For the joint head composed of the penetrating portion 2, the support portion 3, and the reinforcing bar portion 4, a large force is applied to escape the joint head from the segment S in the axial direction of the bolt 7. In this case, stress concentration occurs in the peripheral segment S of the bolt insertion part 2, and as a result, the bolt is wound around the bolt insertion part 2 in the bolt box H of the segment S. There exists a possibility that the crack extended in the radial direction of the insertion part 2 may generate | occur | produce.

In the concrete structure described in Japanese Unexamined Patent Application Publication No. 2-109894 (claims 1 to 2 and FIGS. 4 to 5), if the bolt is too tight, a large force acts on the concrete body 10 from the support plate 17. There was a risk of stress concentration in the concrete body 10 and cracking.

The present invention has been made in view of the above circumstances, and when the joints embedded in civil structures are fastened by bolts to join civil structures, the cracking of the civil structures can be effectively prevented by the fastening force of bolts. An object of the present invention is to provide a joint device of a civil engineering structure.

MEANS TO SOLVE THE PROBLEM This invention is characterized by the following points, in order to solve the said subject.

That is, the joint apparatus of the civil engineering structure of Claim 1 joins adjacent civil structures by a bolt which joins the joint surface mutually, and joins the joint embedded in the junction part of each joining surface with the bolt, The said joint is joined. Is a joint head having a bolt hole through which the bolt is inserted, a support part protruding from both outer peripheral parts of the fastening part, an anchor head mounting part provided at a distal end of the support part, and the anchor head of the joint head. A plurality of anchor columns coupled to the column mounting portion, the buried portion of the seam, the joint surface side of the joint head including the outer peripheral surface of the fastening portion, the front surface of the support portion, and the front surface of the anchor pillar installation portion It is characterized in that a buffer zone consisting of a gap formed between the front surface is provided.

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In the above seam device, it is preferable that a buffer member is mounted in the buffer zone.

In the joint device of the civil structure, the civil structure may be a segment for forming a cavity of the tunnel.

EMBODIMENT OF THE INVENTION Hereinafter, the joint apparatus of the civil engineering structure which concerns on the Example of this invention is demonstrated with reference to FIGS.

1 to 3 show a seam device 10 of a civil engineering structure according to the first embodiment of the present invention. As shown in FIG. 4, the joint device 10 of the civil engineering structure (hereinafter sometimes referred to as the seam device 10) is a concrete segment (segment, which is one of the civil engineering structures used for the restoration of the shield tunnel, etc.). 11, a plurality of bolt boxes 12 provided at both ends 11a and 11a in the arc direction and a plurality of bolt boxes provided at both ends 11b and 11b in the axial direction (axial direction of the tunnel to be perforated) 13 is provided with a joint 14 embedded corresponding to one or both sides.

The joint 14 includes a bolt insertion part (fastening part 15) in which a bolt hole 15a is provided on the central axis, and both sides of the outer peripheral part of the bolt insertion part 15 (Figs. 1 and 3). Anchor pillars installed on a pair of support portions 16, 16 and proximal ends (free ends) of the support portions 16, 16, which are provided to protrude upward and downward, and are arranged in a straight line from the front (Fig. 3). The parts 17 and 17 are provided with the joint head 18 formed integrally by the casting of cast iron having high rigidity, such as ductile cast iron, and the rear end part of each said anchor column installation part 17 and 17. Anchors (19, 19) extending in the direction parallel to the axis of the bolt insertion portion (15, bolt hole 15a) are fixed to (right end in Fig. 1).

The bolt insertion portion 15 and the anchor column mounting portion 17 are provided in parallel with each other, and the front end side (left end side in FIGS. 1 and 2) is the rear end side (right end side in FIGS. 1 and 2). Is formed into a cylindrical body having a taper of a slightly larger diameter than the outer periphery, and the anchor column mounting portion 17 is positioned to the rear side (right side in FIG. 1) in the axial direction with respect to the bolt insertion portion 15. Installed by moving Moreover, the said support parts 16 and 16 which connect it connect the reinforcement part 16b orthogonal to the plate part 16a at the front end of the plate part 16a along the plate surface in the axial direction of the said bolt hole 15a. The cross section is formed into a T-shape by joining, and the reinforcement portion 16b is the rear end side in the axial direction of the bolt insertion portion 15 toward the anchor post installation portion 17, 17 side (the tip side). It is inclined to tilt from 1 to the right end side).

Further, the anchor column 19 is provided on the outer circumference of the circular straight shaft portion having a cross section with a plurality of annular protrusions orthogonal in the axial direction at intervals in the circumferential direction, and at the same time, the protrusions along the axial direction in the circumferential direction. It is composed of a conventional well-known screw film reinforcing bar which is provided with a plurality of spaced apart at intervals, and the male screw portion formed in the front end portion thereof is screwed into the screw hole provided in the rear portion of the anchor pillar mounting portion 17, whereby the anchor pillar mounting portion ( 17) is integrally connected and fixed. The fixing of the anchor column 19 to the anchor column mounting portion 17 may be integrally connected by so-called casting.

When the joint 14 of the said structure is embedded in the edge part 11a of the arc direction of the said segment 11, as shown in FIG. 1, the segment 11 in the edge part 11a of the segment 11 is shown. The seam between the front wall 12b of the bottomed bolt box 12 having the openings 12a, see FIGS. 2 and 3 on the inner surface 11c side of the bottom 11c and the joint surface 11d of the segment 11. At the same time as the head 18 is positioned, each anchor column 19, 19 is located on both sides (up and down in Figs. 1 and 3) with the bolt box 12 interposed therebetween, and the bolt insertion part 15 ), The front end face 15b of the () is fitted to the joint face 11d of the segment 11, so that the rear end face 15c of the bolt insertion part 15 is exposed in the bolt box 12 and embedded in the segment 11. It is.

And in the embedding part of the said joint head 18 in the segment 11, the outer peripheral surface 15d of the front end side of the said bolt insertion part 15, and the front surface of the said support part 16 (reinforcement part 16b) A segment 11 is provided with a buffer zone 20 formed of an empty gap between the joint head 18 including the front face 17a of the anchor pillar mounting portion 17. The buffer zone 20 is equipped with a buffer member 21 made of a soft material made of a material such as butyl rubber, other elastic rubber, polyethylene foam, or the like.

In the case where the adjacent segments 11 and 11 are joined by such a seam device 10, adjacent segments 11 and 11 are joined as in the case of joining the conventional segments S and S as shown in FIG. The joint surfaces 11d and 11d of the 11 and 11 are brought into contact with each other, and the front end surfaces 15b and 15b of the bolt insertion portions 15 and 15 at the joints 14 and 14 are respectively bolted to each other. Contact with the centers of 15a and 15a coincident, and insert the bolt 22 into the bolt holes 15a and 15a from the opening 12a of the bolt box 12 through the bolt box 12. The joints 14 and 14 are coupled to each other by screwing and screwing the nut 23 onto the bolt 22.

According to the joint device 10 of the civil construction according to the first embodiment, the joint 14 is embedded in a joint surrounding the bolt box 12 of the segment 11, and the joint head ( Since the buffer zone 20 is provided in front of 18) and the shock absorbing material 21 is mounted in the buffer zone 20, the bolt penetrated through the bolt insertion portion 15 of the joint 14 is provided. When tightening the 22 and joining the segments 11 and 11 to each other, the pulling force to pull the joint 14 out of the segment 11 is acted upon by the fastening force of the bolt 22 so that the joint head 18 is operated. Even if it is displaced, the displacement is absorbed by the buffer zone 20.

Therefore, it is possible to effectively suppress the occurrence of stress concentration by the pulling force in the buried portion of the joint head 18 in the segment 11 inevitably reduced in strength by the formation of the bolt box 12, The bolt fastening force at the fastening portion of 18) can reliably prevent the occurrence of cracks around the fastening portion of the bolt box 12 of the segment 11.

For this reason, the fastening force of the bolt 22 can be raised and the joint of the segments 11 and 11 can be strengthened. In addition, while the shock absorbing member 21 mounted in the shock absorbing region 20 absorbs the displacement of the seam head 18 of the seam 14 due to the fastening force of the bolt 22, the seam head 18 is segmented. 11) can be firmly and elastically supported, and the fall of the pullout resistance from the segment 11 of the joint 14 can be suppressed as small as possible.

Moreover, in the seam device 10 which concerns on the said embodiment, although the seam 14 was made into the simple structure which provided only one pair of anchor columns 19 and 19 in the both sides of the seam head 18, it is not limited to this, The number of the anchor columns 19 in (14) may be three or more. In this case, three or more support portions 16 are provided at the outer circumference of the bolt insertion portion 15 of the joint head 18, and anchor columns 19 are provided thereon, or the support portions 16 and 16 are provided. 14 to which a plurality of the anchor columns 19 and 19 are provided, as shown by the dotted lines in FIG. 2 and FIG. ) May be paralleled, and the bolt insertion part 15 may be connected to the connection part 14a.

Moreover, although the case where the segments 11 and 11 which embedded the said joint 14.14 of the same structure were joined was demonstrated, the joint 14 embedded in the other segment 11 has a bolt insertion penetration. Instead of installing the bolt hole 15a in the part 15, a screw hole is provided, and the bolt 22 inserted from the bolt hole 15a of one joint 14 is screwed into the screw hole and tightened. The insert nut may be embedded in the other segment 11, and the bolt 22 inserted through the joint 14 of one segment 11 may be screwed into the insert nut and tightened ( 5, which shows a second embodiment to be described later), as long as the joint of the other segment 11 is fastened by bolts, the shape thereof is not particularly limited.

Next, FIG. 5 shows a seam device 30 of a civil structure according to a second embodiment of the present invention. The joint device 30 of the civil engineering structure (hereinafter sometimes referred to simply as the joint device 30) is the rear end portion of the fastening portion 31 having the screw hole 31a at the front end portion (the left end portion in Fig. 5). Segment (column end) is integrally coupled to the anchor pillar 32 having a joint (33) consisting of one insert nut, and does not have a bolt box (12, 13) like the segment (civil structure) , End face 34b of the fastening portion 31 is buried in the state perpendicular to the joint surface 34c of the segment 34 and orthogonal to the joint surface 34c. . In the outer circumferential portion of the fastening portion 31 (the front end of the insert nut) in the segment 34, a buffer region 35 formed of an empty annular gap is provided between the outer circumference portion, and the buffer region 35 is A shock absorbing member 36 made of the same material as the shock absorbing member 20 is mounted. The shape of the anchor column 32 of the insert nut (joint 33) is almost the same as that of the anchor column 19.

When joining adjacent segments 34 and 11 by the joint apparatus 30 of the said structure, the joining surfaces 11d and 34b of adjacent segments 11 and 34 contact, and an insert The front end face 31b of the nut 33 and the front end face 15b of the bolt insertion passage 15 at the joint 14 are in a state where the center of the screw hole 31a and the bolt hole 15a coincide. The bolt 37 is inserted through the bolt box H from the opening of the bolt box H into the bolt hole 15a of the bolt insertion passage 15, and the bolt 37 Is screwed into the screw hole 31a of the insert nut 33 to engage the insert nut 33 and the joint 14.

According to the joint device 30 of the civil engineering structure according to the second embodiment, the outer periphery of the fastening portion 31 in front of the insert nut 33 in the segment 34 in which the insert nut as the seam 33 is embedded. Since the buffer zone 35 is provided on the side and the shock absorbing member 36 is mounted on the buffer zone 35, the segment 34, by tightening the bolt 37 screwed to the fastening portion 31. 11) When the joints 31 are displaced by the force of tightening the bolts 37 to pull the insert nut 33 out of the segment 34 when the joints 31 are displaced by the force of tightening the bolts 37, the displacement is the above. Absorbed by the buffer zone 35.

Therefore, it is possible to effectively suppress the occurrence of stress concentration by the drawing force in the buried portion of the fastening portion 31 in the segment 34, and the fastening force of the bolt in the fastening portion 31 of the insert nut 33 This can reliably prevent the occurrence of cracks around the fastening portion 31 in the segment 34. In addition, similarly to the joint apparatus 10 according to the first embodiment, the effect based on the shock absorbing member 36 can be obtained.

In addition, as a joint of the other segment 11 screwed to the insert nut 33 embedded in one segment 34, it is not limited to the shape of the said joint 14, The insert nut 33 The bolt 37 may be screwed together to join any of them.

Moreover, in the joint apparatus 10, 30 of the civil engineering structure which concerns on the said 1st, 2nd Example, the front surface of the joint head 18 which is the front end side of the said joint 14, and the front end of a joint (insert nut 33) are shown. Although the buffer zones 20 and 35 were provided in the outer peripheral part of the side, respectively, and the buffer members 21 and 36 were mounted in the buffer zones 20 and 35, the present invention is not limited to this, but the buffer member 21 is provided. And 36) may be omitted.

In addition, although the threaded film reinforcing bar was used as the anchor columns 19 and 32, the anchor columns 19 and 32 are not limited to this, and the shaft part which made the cross section cross-shaped, straight, triangular, or other shape In addition, you may use the thing of the structure which provided two or more flanges orthogonal to an axis at intervals in the axial direction, and the other structure.

In addition, although the joint apparatus 10, 30 of the civil engineering structure which concerns on said each Example was demonstrated as joining together concrete segments, this invention is not limited to this, Comprising: A mold plate and a joint plate are combined with a skin plate. It is also applicable to joining concrete injection-type segments formed by pouring concrete inside the mold.

In addition, although the above description demonstrated the example which applied to the segments 11 and 34 as a civil engineering structure, the civil engineering structure in the joint apparatus of the civil engineering structure which concerns on this invention is not limited to a segment. Any civil structure may be used as long as it is a civil structure for joining together to form a civil structure. For example, there may be mentioned slabs, walls, bridge structures, and the like. The shape can be applied to various shapes such as a plate shape, a cylindrical shape, a box shape, a block shape, and the like, and various combinations such as concrete structures, steel structures, structures in which steel materials and concrete are combined can be adopted. .

As described above, the present invention has the following excellent effects.

According to the joint apparatus of the civil engineering structure of Claim 1, in the joint embedment part in the civil structural body which installed the bolt box, the buffer area is provided in the edge part which is easy to generate stress concentration by the pulling force from the civil structural structure which acts on a joint. Therefore, it is possible to effectively prevent the occurrence of cracks in the civil engineering structures by the fastening force of the bolts at the fastening portion of the joint head, and to increase the fastening force of the bolts, thereby making it possible to firmly join the civil structures. In addition, the joint head is disposed between the joint surface of the civil engineering structure and the bolt box, and the joint is embedded in the civil engineering structure with anchor columns on both sides of the bolt box. As a result, it is possible to suppress the stress concentration on the part of the civil structure inevitably deteriorated due to the formation of the bolt box, so that the crack is generated around the fastening part of the bolt box of the civil structure by the fastening force of the bolt at the fastening part of the joint head. It can surely be prevented.

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In the case where the buffer member is mounted in the buffer zone, the shock absorbing member can reliably and elastically support the joint in the civil structure while absorbing the displacement of the joint due to the fastening force of the bolt and preventing the civil structure from cracking well. have.

In the case where the civil structure is a segment that forms a hollow hole in the tunnel, cracks and the like can be reliably prevented even when a strong clamping force is generated at the time of joining the segments, so that a highly reliable tunnel hole can be constructed.

In addition, since the occurrence of a defect due to the fastening step can be suppressed, the construction efficiency of the tunnel can be improved.

Claims (7)

In a joint device in which adjacent civil structures are joined by abutting joints thereof with each other and bolting joints embedded in joints near each joint surface with bolts. The joint is a joint head having a bolt hole through which the bolt is inserted, a support part protruding from both outer peripheral parts of the fastening part, a joint head having an anchor column mounting part provided at a distal end of the support part, and a joint head of the joint head. It has a plurality of anchor pillars coupled to the anchor pillar installation portion, The buried portion of the seam is provided with a buffer region formed on the joining surface side with a gap formed between the outer circumferential surface of the fastening portion, the front surface of the support portion, and the front surface of the seam head including the front surface of the anchor pillar mounting portion. Seam device of the civil engineering structure, characterized in that there is. delete delete delete The method of claim 1, A joint device of a civil engineering structure, characterized in that a buffer member is mounted in the buffer zone. 6. The method according to claim 1 or 5, The joint structure of the civil structure, characterized in that the civil structure is a segment for forming a cavity of the tunnel. delete

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