JP3305210B2 - Connecting structure of concrete segments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure used when connecting concrete segments used for constructing a tunnel or the like in a ring direction.

[0002]

2. Description of the Related Art Conventionally, this type of concrete segment connection structure has been adjusted so that alignment can be performed when connecting each new concrete segment to each concrete segment forming an existing segment ring. What provided a core part is generally known.

[0003]

However, in the conventional connection structure described above, if the alignment can be reliably performed to maintain the roundness of the segment ring, the alignment portion tends to have a complicated structure. At the same time, if such an alignment portion is to be formed, there is a problem that it must be performed as a special step when manufacturing a concrete segment. Therefore, in the conventional connection structure, if the alignment can be performed, the concrete segment becomes expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object the purpose of easily forming a centering portion with a simple structure and ensuring that the centering is performed by the centering portion. It is an object of the present invention to provide a concrete structure for connecting concrete segments.

[0005]

In the connecting structure of the present invention, an insertion hole formed at the center of the inter-ring direction connection surface in each concrete segment is formed so as to be inserted into the insertion hole. A half-split that is formed on the centering pin and the connecting surface in the direction between the segments in each concrete segment so that when the connecting surface in the direction between the segments is abutted, an insertion hole can be formed in the connecting surface in the direction between the rings And a hole. The centering pin has one side inserted into an insertion hole formed at the center of the inter-ring direction connection surface, and the other side when the other side faces the inter-segment direction connection surface. It is inserted into an insertion hole formed by a half hole.

According to such a connection structure of the present invention, a centering pin is prepared, and an insertion hole (half hole) is formed in the connection surface of the concrete segment. The core can be easily configured. In addition, the centering pin ensures that the centering can be performed.

In addition, by assembling the centering pins at the time of assembling the concrete segments, it is possible to eliminate the difference in the joint between the concrete segments,
Prevent the displacement of each segment. In addition, the roundness of the segment ring formed by each concrete segment is maintained. Furthermore, the concrete segments are prevented from rotating in the circumferential direction, so that the concrete segments can be assembled smoothly.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete segment connecting structure of the present invention will be described below with reference to an embodiment shown in the drawings.

A connection structure 1 (see FIG. 1) of each concrete segment 2 in the direction between the rings used when constructing a tunnel or the like has an insert formed at the center of the inter-ring direction connection surface 2a in each concrete segment 2. Hole 3
And a centering pin 4 formed so as to be inserted into the insertion hole 3 and a connecting surface in the inter-segment direction of each concrete segment 2 when the inter-segment direction connecting surface 2b is abutted. And a half hole 5 in which the insertion hole 3 can be formed in the connecting surface 2a in the direction between the rings. And one side of the alignment pin 4 is
It is inserted into the insertion hole 3 formed at the center of the inter-ring direction connection surface 2a, and the other side is formed by the two half holes 5 when the inter-segment direction connection surface 2b is abutted. It is inserted in the hole 3.

Further, as shown in FIG. 2, the alignment pin 4 is
Two truncated pyramids or truncated cones are integrated with the bottom surfaces 4b of the truncated pyramids or truncated cones opposite to the truncated cone 4a facing each other. At the same time, an insertion hole 3 formed at the center of the inter-ring direction connection surface 2a for inserting the alignment pin 4 and an inter-segment direction connection surface
Insertion hole 3 formed by both halves 5 when 2b is abutted
As shown in FIGS. 1 and 5, the shape of the inner surface is formed in the shape of a truncated pyramid or a truncated cone having the same shape as the alignment pin 4.

The centering pin 4 in the embodiment shown in FIG. 1 is made of plastic which is easy to process and has two truncated square pyramids which are truncated pyramids. It was done. Thus, the truncated pyramid may be a triangular pyramid as shown in FIG. 3 or a pentagonal pyramid, a hexagonal pyramid, an octagonal pyramid (not shown). Other than the truncated pyramid, a truncated cone as shown in FIG. 4 is also conceivable.

Further, as shown in FIG. 5, the concrete segment 2 in this embodiment is a state where two truncated quadrangular pyramids are integrated at the center of the connecting surface 2a in the direction between the rings of the segment 2. An insertion hole 3 into which the alignment pin 4 is inserted is formed, and a half hole 5 in which the truncated quadrangular pyramid is halved in the axial direction is formed at the four corners of the segment 2. FIG. 6 shows the state of the insertion hole 3 and the half hole 5 when the alignment pin 4 is replaced by a truncated triangular pyramid instead of a truncated quadrangular pyramid. FIG. 7 shows the alignment pins 4.
5 shows the state of the insertion hole 3 and the half-hole 5 when is a truncated cone.

The connection of each concrete segment 2 using the connection structure 1 having such a configuration is first performed by the method shown in FIG.
As shown in FIG. 9, the centering pin 4 is inserted into the insertion hole 3 (the insertion hole 3 including the two half holes 5) formed in the concrete segment 2 in the ring direction. Then, as shown in FIGS. 1 and 9, a new concrete segment 2 insertion hole 3 is inserted into the alignment pin 4.
Is fitted. By interposing the centering pin 4 in this way, as shown in FIGS. 1 and 8, the two concrete segments 2 to be connected are connected.

According to the connecting structure of the present invention, the alignment pins 4 are prepared and the concrete segments 2 are provided.
The centering portion of the concrete segment 2 can be easily formed with a simple structure in which only the insertion hole 3 (half hole 5) is formed in the connection surface 2a of the concrete segment 2. Moreover, the alignment pins 4
Thereby, alignment can be performed reliably.

Also, when assembling the concrete segments 2, the alignment of the joints between the concrete segments 2 is eliminated by interposing the centering pins 4 such as truncated quadrangular pyramids, and the displacement of the segments 2 is eliminated. Can be prevented. Moreover, when the segment rings 6 (see FIGS. 10 to 12) are formed by the concrete segments 2, the roundness of the segment rings 6 by the concrete segments 2 can be maintained.

Further, by assembling with the centering pins 4 interposed therebetween, it is possible to assemble the concrete segments 2 while preventing the concrete segments 2 from rotating in the circumferential direction. Also,
The assembling effect between the rings 6 can be easily obtained at the time of assembly.

When there are few joint fittings per piece (concrete segment), such as when there are two joint fittings between rings, the centering pin 4 is used.
In the concrete segment 2 interposed therebetween, the above-mentioned effect can be exhibited more. This is because it is common practice to reduce the number of joints in order to reduce the cost of the concrete segment 2 and to assemble it quickly.

[0018]

According to the present invention, the centering pin in the concrete segment can be easily formed with a simple structure in which the centering pin is prepared and the insertion hole (half hole) is formed in the connecting surface of the concrete segment. Can be configured. Further, the alignment can be reliably performed by the alignment pins. In addition, since the alignment pins are interposed at the time of assembling the concrete segments, misalignment of the joints between the concrete segments can be eliminated, and the displacement of each segment can be prevented. In addition, the roundness of the segment ring formed by each concrete segment can be maintained. Further, since it is possible to prevent the rotation of each concrete segment in the circumferential direction, it is possible to smoothly assemble each concrete segment.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a concrete segment connection structure of the present invention.

FIG. 2 is a schematic perspective view showing a centering pin used in the connection structure of the present invention.

FIG. 3 is a schematic perspective view showing another embodiment of the alignment pin used in the connection structure of the present invention.

FIG. 4 is a schematic perspective view showing another embodiment of the alignment pin used in the connection structure of the present invention.

FIG. 5 is a schematic perspective view showing a concrete segment used in the connection structure of the present invention.

FIG. 6 is a schematic perspective view showing another embodiment of a concrete segment used in the connection structure of the present invention.

FIG. 7 is a schematic perspective view showing another embodiment of a concrete segment used in the connection structure of the present invention.

FIG. 8 is a schematic diagram showing a connection state of both concrete segments to be connected by the connection structure of the present invention.

FIG. 9 is a schematic view showing a connecting process of both concrete segments to be connected by the connecting structure of the present invention.

FIG. 10 is a schematic view showing a segment ring assembled by the connection structure of the present invention.

FIG. 11 is a schematic view showing another embodiment of the segment ring assembled by the connection structure of the present invention.

FIG. 12 is a sectional view taken along line AA of FIG. 11;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Connection structure, 2 ... Concrete segment, 2a ... Connection surface in the direction between rings, 2b ... Connection surface in the direction between segments, 3
... insertion holes, 4 ... alignment pins, 5 ... half-split holes, 6 ... segment rings.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E21D 11/04 E04B 1/48 E21D 11/08 F16B 5/00

Claims (2)

(57) [Claims] 1. A connecting structure in a direction between rings of concrete segments used when constructing a tunnel or the like, comprising: an insertion hole formed in a central portion of a connecting surface between rings in each concrete segment; A centering pin formed so as to be inserted into the insertion hole, and a connecting surface in the inter-segment direction in each of the concrete segments, the connecting surface in the inter-ring direction when the inter-segment direction connecting surface is abutted. And a half split hole capable of forming the insertion hole. The alignment pin has one side inserted into the insertion hole formed at the center of the inter-ring direction connection surface. And the other side is inserted into an insertion hole formed by both halves when the inter-segment direction connection surface is abutted. Consolidated structure of emissions cleat segment. 2. The truncated pyramid or the truncated cone is formed by integrating the two truncated pyramids or the truncated cone with the bottom surfaces of the truncated pyramid or the truncated cone opposite to the truncated cone. And an insertion hole formed in the center of the inter-ring directional connection surface for inserting the alignment pin, and both halves when the inter-segment directional connection surface is brought into contact. 2. The concrete segment connection structure according to claim 1, wherein the formed insertion hole has an inner surface formed in a truncated pyramid shape or a truncated cone shape having the same shape as the alignment pin.