JPH11287097A - Segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a joint opening at the places of the joining of mutual segments while obviating crack of concrete packed therein. SOLUTION: Reinforcing plates 12, 22 are superposed on the internal surface sides of main girder plates 3 and a joint bar 4 in the joining sections of the main girder plate 3 and the joint bar 4 on one side, and the peripheries of the reinforcing plates 12, 22 are welded and fixed. Insert nuts 14, 24 disposed and welded and fixed into the recessed sections 15a, 25a of stationary plates 15, 25 formed in a U shape are installed to the joining sections 9 of the main girder plates 3 and the joint bar 4 on the other side, and both-side end sections of the stationary plates 15, 25 are welded and fastened. Bolts are inserted from the bolt boxes 10 of the joining sections 9, on which the reinforcing plates 12, 22 are mounted, under the state, in which the main girder plates 3 or the joint bars 4 are abutted mutually, and clamped and fixed to the insert nuts 14, 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment forming a cylindrical wall in the axial direction of a drilled hole by joining a plurality of holes to each other.

[0002]

2. Description of the Related Art Generally, when constructing a tunnel, a digging hole is formed and a lining is provided to support a wall surface of the digging hole. As this lining, a cylindrical wall body formed by connecting a ring body in which a segment in the shape of an arc plate having a rectangular shape in a plan view is provided around the axis of the drilling hole and connected in the axial direction of the drilling hole is used. Here, as an example of a segment constituting this kind of cylindrical wall, a segment shown in FIG. 15 will be described. The segment 1 is made of a steel plate and concrete C. The main girder plate 3 and the joint plate 4 are joined to the periphery of a steel skin plate 2 and the inside of a frame body 5 formed by these. Concrete C
Are formed.

A plurality of vertical ribs 6 for increasing the mechanical strength of the segments 1 are provided between the main girder plates 3, and both ends of the vertical ribs 6 are provided on the inner surface of the main girder plate 3. Welded and joined. Further, between the longitudinal ribs 6 and the joint plate 4 at both end sides, a reinforcing flange 7 arranged in parallel with the main girder plate 3 is provided. The main girder plate 3 and the main girder plate 3 and the reinforcing flange 7 between the vertical ribs 3
Each of the joint plates 4 has a through-hole 8 formed therein, and a portion where the through-hole 8 is formed is a joining portion 9. In addition, bolt boxes 10 are formed on the inner surface side of the concrete C at the joints 9, and the bolt boxes 10 are used to insert bolts.
The mounting work of the nut is performed.

[0004]

By the way, at the joint between the segments 1, a tensile force is applied inside the sharply curved portion R of the cylindrical wall as shown in FIG. For this reason, as shown in FIGS. 17 and 18, the main girder plate 3 and the joint plate 4 are deformed by the tensile force at the joint between the main girder plates 3 and the joint plate 4 between the segments 1. However, there is a risk that openings may occur at these joints. In particular, when the joint plate 3 is pulled, the vertical ribs 6 to which the tensile force is transmitted are also pulled, so that the concrete C filled at the place where the vertical ribs 6 are disposed is filled.
There was also a risk that cracks would occur.

[0005] The present invention has been made in view of the above circumstances, without opening at the joints between each other,
It is another object of the present invention to provide a segment free from cracks in concrete.

[0006]

In order to achieve the above object, the segments according to claim 1 are connected circumferentially,
Furthermore, by being connected in the axial direction, it is a segment that forms a cylindrical wall inside the excavation hole, and is composed of a box-shaped frame whose inner surface side is opened, and concrete packed inside the frame. The frame body has a skin plate disposed on an outer peripheral side, main girder plates provided on both sides of the skin plate, and joint plates provided on both ends of the skin plate, By fastening the main girder plate and the joint plate to each other with bolts and nuts, adjacent segments are joined to each other, and the main girder plate and the joint plate are substantially separated from the main girder plate and the joint plate. A pair of plate members provided at right angles to each other is a joint to be joined to an adjacent segment, and the main girder plate and the joint plate at the joint are reinforced by a reinforcing plate provided on the inner surface side thereof. Been It is characterized in Rukoto.

According to a second aspect of the present invention, in the segment according to the first aspect, a plate provided substantially orthogonal to the main girder plate is disposed between the main girder plates. Both ends are characterized by vertical ribs fixed to the main girder plate. The segment according to claim 3 is:
3. The segment according to claim 2, wherein one of the plate members provided substantially orthogonal to the joint plate is formed of the main girder plate, and the other is formed of a reinforcing flange fixed to the longitudinal rib. And

According to a fourth aspect of the present invention, in the segment of the third aspect, at least the longitudinal rib to which the reinforcing flange is fixed has a reinforcing rib substantially orthogonal to the longitudinal rib fixed along the longitudinal direction. It is characterized by having. According to a fifth aspect of the present invention, in the segment of the third aspect, at least the longitudinal rib to which the reinforcing flange is fixed is formed in an L-shaped cross section or a T-shaped cross section having a reinforcing rib portion in a direction substantially orthogonal to the rib. It is characterized by having.

According to a sixth aspect of the present invention, in the segment according to the first aspect, a plate provided substantially orthogonal to the joint plate comprises one of the main girder plates, and the other includes the joint plate. And a middle main girder plate provided between and along the main girder plate. Claim 7
The segment described in the segment according to claim 6, wherein a plate body provided substantially orthogonal to the main girder plate is disposed between the main girder plate and the middle main girder plate. Both ends are characterized by comprising a reinforcing flange fixed to the main girder plate and the middle main girder plate.

According to an eighth aspect of the present invention, in the segment according to the sixth or seventh aspect, vertical ribs having both ends fixed to the middle main girder plate are provided between the middle main girder plates. It is characterized by having. According to a ninth aspect of the present invention, in the segment according to any one of the first to eighth aspects, an insert nut is provided on one side of the joints joined to each other. According to a tenth aspect of the present invention, in the segment of the ninth aspect, the insert nut is fixed to a fixing plate having at least both sides fixed to the plate.

According to the segments described in claims 1 to 3 and claims 6 to 8, the joint portion is largely formed by the reinforcing plate provided on the inner surface side of the joint portion between the main girder plate and the joint plate. Since the strength is increased, for example, even inside the sharply curved portion of the cylindrical wall body to which a large tensile force is applied, deformation due to the tensile force is prevented, and thereby opening between the segments is prevented.

According to the segments described in claims 4 and 5, the reinforcing rib or the reinforcing rib portion is provided in the longitudinal direction on the longitudinal rib to which the reinforcing flange is fixed, so that the bending strength is greatly improved. Therefore, even if a tensile force is generated at the joint between the joint plates and the tensile force is transmitted to the vertical rib via the reinforcing flange, the bending deformation of the vertical rib is suppressed, and the bending deformation of the vertical rib is caused. Cracks in the filled concrete are prevented.

According to the ninth aspect of the present invention, since the insert nut is provided on the other side of the joints to be joined to each other, a bolt box for mounting a bolt or a nut is not required. In other words, it is possible to reduce the number of bolt boxes formed in the segments by half, thereby reducing the work of closing the bolt box after lining by filling it with mortar, etc., and reducing the labor of construction significantly Is done.

According to the tenth aspect of the present invention, since the insert nut is fixed to the fixing plate whose both sides are fixed to the plate body, even if a tensile force is generated at the joint, the main girder plate or the joint can be used. Deformation of the plate is prevented, which also ensures that openings at the joints are prevented.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a preferred embodiment of the present invention. The same components as those of the conventional technology are denoted by the same reference numerals, and description thereof is omitted. Figure 1
In FIG. 4, reference numeral 11 denotes a segment. Joint 9 provided on main beam 3 on one side of segment 11
Is provided with a reinforcing plate 12 superposed on the inner surface side of the main girder plate 3. An insertion hole 13 is formed in the reinforcing plate 12, and the insertion hole 13 communicates with the insertion hole 8 formed in the main girder plate 3. The reinforcing plate 12
Are welded and fixed to the vertical ribs 6, the skin plate 2 and the main girder plate 3, respectively.

An insert nut (nut) 14 is provided at the joint 9 provided on the other main girder plate 3. At the joint 9 where the insert nut 14 is provided, a U-shaped fixing plate 15 is provided substantially parallel to the skin plate 2, and both ends of the fixing plate 15 are connected to the vertical ribs 6. Fixed by welding.

The insert nut 14 is provided in a recess 15a formed in the fixing plate 15.
The outer periphery of the insert nut 14 and the recess 1 of the fixing plate 15
The edge 5a is fixed by welding. Also, the fixing plate 15
The end of the insert nut 14 is welded and fixed to the inner surface of the main girder plate 3, and a screw hole formed in the insert nut 14 is communicated with an insertion hole 8 formed in the main girder plate 3.

Next, the joint 9 provided on the joint plate 4 will be described. The joint 9 provided on the joint plate 4 on one side
As in the case of the main girder plate 3 described above, a reinforcing plate 22 is provided on the inner surface side of the joint plate 4. The reinforcing plate 22 has an insertion hole 23 formed therein.
3 communicates with an insertion hole 8 formed in the joint plate 4. The periphery of the reinforcing plate 22 is welded and fixed to the reinforcing flange 7, the main girder plate 4, the skin plate 2 and the joint plate 4, respectively.

At the joint 9 provided on the other joint plate 4, similarly to the main girder plate 3, a U-shaped fixing plate 25 is provided substantially parallel to the skin plate 2. Both ends of the fixing plate 25 are welded and fixed to the main girder plate 3 and the reinforcing flange 7, respectively. The insert nut 2 is inserted into the recess 25a formed in the fixing plate 25.
The outer periphery of the insert nut 24 and the edge of the recess 25a of the fixing plate 25 are fixed by welding. The ends of the fixing plate 25 and the insert nut 24 are fixed by welding to the inner surface of the joint plate 4.

The longitudinal ribs 6 to which the reinforcing flanges 7 constituting the joints 9 provided on the joint plate 4 are fixed by welding are provided.
Reinforcing ribs 26 projecting in the direction substantially perpendicular to the reinforcing flange 7 in the longitudinal direction are fixed by welding. In addition, the insertion holes 8 and 23 in the joint 9 on the side where the bolt 27 is inserted, that is, on the side where the reinforcing plates 12 and 22 are provided, have a diameter sufficiently larger than the diameter of the bolt in order to easily insert the bolt 27. Is formed.

When the segments 11 are joined in the axial direction of the borehole, as shown in FIGS.
By adjoining the segment 11 to the side of the existing segment 11, the main girder plates 3 are brought into contact with each other, and a reinforcing plate 12
The bolt 27 is inserted into the insertion hole 13 of
And screwed into the insert nut 14 for fixing. Here, the bolt 27 is provided with a washer 27 in advance to counter internal water pressure generated by the flow of water or the like in the cylindrical wall.
a is attached.

When the segments 11 are joined in the circumferential direction, similarly to the above, as shown in FIGS.
By adjoining the segment 11 to the end of the existing segment 11, the joint plates 4 are brought into contact with each other, and the reinforcing plate 22
The bolt 27 is inserted into the through hole 23 of the connecting portion 9 on the other side.
And screwed into the insert nut 24 to fasten and fix it.

According to the segment 11 having the above-described structure, the joining portion 9 is greatly strengthened by the reinforcing plates 12 and 22 provided on the inner surfaces of the main girder plate 3 and the joint plate 4 at the joining portion 9. Therefore, for example, even inside the sharply curved portion R of the cylindrical wall body to which a large tensile force is applied, deformation due to the tensile force is prevented, whereby it is possible to reliably prevent the openings between the segments 11. it can.

In the segment 11, since the joint 9 on the other side is the joint 9 provided with the insert nuts 14 and 24, the bolt box 10 for mounting bolts and nuts is unnecessary. can do.
That is, the bolt box 1 formed on the segment 11
0 can be halved, so that the closing operation of closing the bolt box 10 with mortar or the like after lining can be halved, and the labor of construction can be greatly reduced.

Further, since the insert nuts 14 and 24 are fixed to the fixing plates 15 and 25 having both sides fixed to the longitudinal rib 6 or the main girder plate 3 and the reinforcing flange 7, a tensile force is generated at the joint. In this case, the deformation of the main girder plate 3 or the joint plate 4 is prevented, so that the opening at the joint is also reliably prevented.

Furthermore, since the reinforcing ribs 26 are fixed in the longitudinal direction to the longitudinal ribs 6 to which the reinforcing flanges 7 are fixed, and the bending strength is greatly improved, a tensile force is applied to the joint between the joint plates 4. Even if this tensile force is transmitted to the vertical ribs 6 via the reinforcing flanges 7, the bending deformation of the vertical ribs 6 is suppressed, and the generation of cracks in the filling concrete C accompanying the bending deformation of the vertical ribs 6 is suppressed. It can be reliably prevented. 9 and 10 as the vertical rib 6.
As shown in FIG. 7, an L-shaped or T-shaped section having a reinforcing rib portion 28 in a direction substantially perpendicular to the section may be used.

Next, a segment having another structure will be described.
The segment 11 shown in FIGS. 11 to 13 is provided with a middle main girder plate 31 along the main girder plate 3. And in this segment 11, the joint 9 of the joint plate 3 is
It is provided between 1 and the main girder plate 3. The main girder plate 3
In the other joint portion 9 provided on the insert nut 14, that is, the joint portion 9 provided with the insert nut 14, the insert nut 1
The rear end of the fixing plate 15 for fixing the fixing member 4 is welded and fixed to the middle main girder plate 31 to further increase the strength.

In this case, in this case, the vertical rib 6 is
1, and the joint 9 is provided between the reinforcing flanges 32 disposed between the main girder plate 3 and the middle main girder plate 31. In FIG. 14, the middle main girder plate 31 has substantially the same height as the main girder plate 3 and is further strengthened. In addition, a reinforcing bar may be provided in the middle-packed concrete C to increase the strength of the entire segment 11.

[0029]

As described above, according to the segment of the present invention, the following effects can be obtained. According to the segments described in claims 1 to 3 and claims 6 to 8, the joint portion is significantly strengthened by the reinforcing plate provided on the inner surface side of the joint portion between the main girder plate and the joint plate. Therefore, for example, even inside the sharply curved portion of the cylindrical wall body to which a large tensile force is applied, deformation due to the tensile force is prevented, and thereby it is possible to reliably prevent the openings between the segments.

According to the segments described in claims 4 and 5, the longitudinal ribs to which the reinforcing flanges are fixed are provided with the reinforcing ribs or the reinforcing rib portions in the longitudinal direction, so that the bending strength is greatly improved. Even if a tensile force is generated at the joint between the plates and the tensile force is transmitted to the vertical ribs via the reinforcing flange, the bending deformation of the vertical ribs is suppressed,
It is possible to reliably prevent cracks in the middle-fill concrete caused by bending deformation of the vertical ribs.

According to the ninth aspect of the present invention, since the insert nut is provided on the other side of the joints joined to each other, a bolt box for mounting a bolt or a nut can be eliminated. In other words, the number of bolt boxes formed in the segments can be reduced by half, thereby reducing the work of closing the bolt boxes after lining by filling them with mortar or the like, thereby greatly reducing the labor required for construction. Can be reduced.

According to the tenth aspect of the present invention, since the insert nut is fixed to the fixing plate whose both sides are fixed to the plate body, even if a tensile force is generated at the joint, the main girder plate or the joint can be used. Deformation of the plate is prevented, which also ensures that openings at the joints are prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of an inner surface side of a cylindrical wall formed by segments for explaining the configuration and structure of a segment according to an embodiment of the present invention.

FIG. 2 is a plan view on the inner surface side of the segment for explaining the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of the segment for explaining the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view in the width direction of the segment for describing the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 5 is a plan view of a joint between main girder plates of a segment according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view of a joint between main girder plates of a segment according to the embodiment of the present invention.

FIG. 7 is a plan view of a joint between joint plates of a segment according to the embodiment of the present invention.

FIG. 8 is a sectional view of a joint between joint plates of a segment according to the embodiment of the present invention.

FIG. 9 is a sectional view of a joint between joint plates of a segment according to another embodiment of the present invention.

FIG. 10 is a sectional view of a joint between joint plates of a segment according to another embodiment of the present invention.

FIG. 11 is a plan view on the inner surface side of a segment for explaining the configuration and structure of the segment according to another embodiment of the present invention.

FIG. 12 is a longitudinal sectional view of a segment for explaining the configuration and structure of the segment according to another embodiment of the present invention.

FIG. 13 is a cross-sectional view in the width direction of the segment for explaining the configuration and structure of the segment according to another embodiment of the present invention.

FIG. 14 is a cross-sectional view in the width direction of a segment for explaining the configuration and structure of the segment according to another embodiment of the present invention.

FIG. 15 is a perspective view of a segment for explaining the configuration and structure of a conventional segment.

FIG. 16 is a plan view of a sharply curved portion of a tubular wall constructed by segments.

FIG. 17 is a plan view of a joint portion between main girder plates of a conventional segment.

FIG. 18 is a plan view of a joint between joint plates of a conventional segment.

[Explanation of symbols]

 2 Skin plate 3 Main girder plate (plate) 4 Joint plate 5 Frame 6 Vertical rib (plate) 7 Reinforcement flange (plate) 9 Joint 11 Segment 12, 22 Reinforcement plate 14 Insert nut (nut) 15 Fixing plate 27 Bolt 26 Reinforcement rib 28 Reinforcement rib part 31 Middle main girder plate (plate) C Concrete

Claims (10)

[Claims] 1. A segment forming a cylindrical wall in an excavation hole by connecting in the circumferential direction and further in the axial direction, wherein the box-shaped frame has an inner surface opened, The frame body is composed of concrete packed inside the body, and the frame body is provided with skin plates disposed on the outer peripheral side, main girder plates provided on both sides of the skin plates, and both ends of the skin plates. The main girder plate and the joint plate are provided, and the main girder plate and the joint plate are fastened to each other by bolts and nuts, so that adjacent segments are joined to each other. The main girder plate and the joint plate at the joint portion are joined to adjacent segments between a pair of plate members provided substantially orthogonal to the main girder plate and the joint plate. On its inner side Segments, characterized in that it is reinforced by the vignetting reinforcing plate. 2. A plate body provided substantially orthogonal to the main girder plate is provided between the main girder plates and has a longitudinal rib fixed at both ends thereof to the main girder plate. The segment according to claim 1, wherein the segment comprises: 3. A plate body provided substantially orthogonal to the joint plate, one of the plate members is formed of the main girder plate, and the other is formed of a reinforcing flange fixed to the longitudinal rib. Item 2. The segment according to Item 2. 4. The segment according to claim 3, wherein at least the longitudinal rib to which the reinforcing flange is fixed has a reinforcing rib substantially perpendicular to the longitudinal rib fixed in the longitudinal direction. . 5. The vertical rib to which at least the reinforcing flange is fixed is formed in an L-shaped cross section or a T-shaped cross section having a reinforcing rib portion in a direction substantially orthogonal to the vertical rib. segment. 6. A plate body provided substantially orthogonal to the joint plate, one of the plate members is formed of the main girder plate, and the other is provided between the joint plates along the main girder plate. 2. The segment according to claim 1, wherein the segment comprises a middle main girder plate. 7. A plate body provided substantially orthogonal to the main girder plate is disposed between the main girder plate and the middle main girder plate, and both ends thereof are provided with the main girder plate and the main girder plate. The segment according to claim 6, comprising a reinforcing flange fixed to the middle main girder plate. 8. The segment according to claim 6, wherein vertical ribs having both ends fixed to the middle main girder plate are provided between the middle main girder plates. . 9. The segment according to claim 1, wherein said joining portions joined to each other have an insert nut provided on one side thereof. 10. The segment according to claim 9, wherein the insert nut is fixed to a fixing plate fixed at least on both sides to the plate body.