JP2001098894A - Connecting portion and fittings for tunnel segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting portion and connecting fittings for tunnel segments, capable of giving a certain tightening force to the connection between segment main bodies and of preventing decrease in tunnel construction workability and an increase in tunnel construction cost by pushing in back-up materials with the least time and labor, even when the pushing position for the shield jack has been dislocated from the joint portion. SOLUTION: At the connecting portion for connecting main bodies F1, F2 of first and second segments for a tunnel by pushing a second segment main body F2 to the first segment main body F1 already built, a reaction receiving portion 9 receiving the reaction caused in a coupling connection R by the pushing operation of the second segment main body is provided at the dovetail groove M2, at least at the facing side among the dovetail groove portions M made in the second main body F2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a first segment main body which has already been constructed in order to construct a tunnel wall by connecting a plurality of tunnel segment bodies in the circumferential direction of the tunnel using a coupling tool. In order to connect the second segment body by pushing it from the face side to the wellhead side along the longitudinal direction of the tunnel to connect the first and second segment bodies,
A butt portion for connecting to each other is provided at an end along the circumferential direction of the tunnel, and a pit-side dovetail portion is formed at an end on the pit side of each of the butt portions, and the cutting face side of each of the butt portions is provided. A face-side dovetail is formed at an end of the first segment body, and a well-side connector is provided at the well-side dovetail part of the first segment body, and a face-side connector is also provided at the face-side dovetail part of the second segment body. The present invention relates to a connection portion and a connection fitting of a tunnel segment for connecting the first and second segment bodies by a pushing operation of the second segment body from a face side to a wellhead side.

[0002]

2. Description of the Related Art Conventionally, as a technique relating to a connecting portion and a connecting fitting of this kind of tunnel segment, FIG.
As shown in (a) and (b), the second segment body F2
The face-side connecting tool R2 is provided so as to protrude from the butting portion 4 of the second segment body F2 in the tunnel circumferential direction X side with respect to the face-face dovetail groove M2, and the first and second segment bodies F1 by the shield jack J are provided. , F2 by pushing the joint portion 11 from the face side to the wellhead side to apply a certain tightening force when the tunnel segment bodies provided at the face side end of the face side connecting member R2 are attracted and connected to each other. The first and second segment bodies F1 and F2 are connected by pulling in the backup material T and the second segment body F2 at the same time.

[0003]

According to the above-described conventional connecting portion and connecting bracket of the tunnel segment, FIG.
As shown in (a) and (b), the second segment body F2
At the same time, the backup material T provided at the face side end of the face side connector R2 is brought into contact with the shield jack J,
The first and second segment bodies F1 and F2 are pushed by the shield jack from the face side to the wellhead side.
F2 was attracted and connected, but FIG.
As shown in (b), the shield jack J is disengaged from the joint portion 11 and does not contact the backup material T provided at the face-side end of the face-side coupler R2. In the case of being pushed in, the deformation reaction force of the backup material T could not be taken, and a fixed tightening force could not be given. In some cases, there is a possibility that the connecting tool may fall out of the segment body F. Therefore, even when the position of the shield jack J is deviated from the joint portion 11, the backup material T provided on the face side end portion is pushed in at the same time as the second segment main body F2.
As shown in FIG. 21A, an enlarged spreader 20 is provided on the shield jack J. Further, as shown in FIG. 21B, a plate 21 is added to a portion that cannot be covered by the enlarged spreader 20, or a joint portion is provided. It is necessary to change the division position of the segment main body or remodel the shield jack J so that the shield jack J is securely attached to 11, and it takes time to attach and detach the enlarged spreader 20 and the plate 21. There is a problem that the cost is lowered and that the cost of tunnel construction is easily increased.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and even when the pushing position of the shield jack is deviated from the joint portion, the backup material is pushed in without any trouble and the connection of the segment bodies is fixed. It is an object of the present invention to provide a connecting portion and a connecting member of a tunnel segment, which can provide a tightening force of the above and can prevent a decrease in tunnel construction workability and an increase in tunnel construction cost.

[0005]

[Structure] As shown in FIGS. 6 to 8, a plurality of tunnel segment main bodies are pulled in a tunnel circumferential direction X by using a connecting member R. In order to connect the second segment main body F2 to the already constructed first segment main body F1 along the longitudinal direction Y of the tunnel from the face side to the wellhead side to connect and connect the first segment main body F1 already constructed, Each of the first and second segment bodies F1 and F2 is provided with a butt portion 4 for coupling with each other at an end along the tunnel circumferential direction X, and is provided at the end 7 on the wellhead side of each butt portion 4. A wellhead side dovetail portion M1 is formed, and each of the butting portions 4 is formed.
A face-face dovetail groove M2 is formed at the face-face-side end 8 of the above, and a pair of enlarged edges that can be separately fitted along both dovetail grooves opposing the first and second segment bodies in a state where they face each other. The abutment surfaces of the dovetail grooves with respect to the enlarged edge are formed into a tapered surface in which the butted portions are relatively close to each other as the enlarged edge is fitted along the dovetail groove. A well-formed connector is provided, and a wellhead-side connector R1 is provided in the wellhead-side dovetail portion M1 of the first segment body F1, and a face-side connector R2 is also provided in the face-side dovetail portion M2 of the second segment body F2.
And a connecting portion of a tunnel segment connecting the first and second segment bodies F1 and F2 by a pushing operation of the second segment body F2 from the face side to the wellhead side, wherein the second segment body is The reaction force receiving portion 9 receiving the reaction force generated in the connecting tool R by the pushing operation of F2 is provided at least in the dovetail groove portion M provided in the first and second segment main bodies F1 and F2. It is located at the face side dovetail portion M2.

A characteristic feature of the second aspect of the present invention is that the reaction force receiving portion 9 is configured to be detachable from the segment main body F as exemplified in FIG.

As shown in FIGS. 2 and 6, when the connecting tool R is provided in the dovetail groove M, the characteristic structure of the invention of claim 3 is between the connecting tool R and the dovetail groove M. There is a regulating member 6 that regulates a change in the posture of the connecting tool R by filling the gap S that is formed.

As shown in FIG. 3, a plurality of dovetail grooves M for joining the adjacent segments in the circumferential direction X are provided in the abutting portion 4 with the adjacent segments. The dovetail groove M in the direction along
The enlarged edge portion 1 of the connecting tool R for segment connection, which integrally includes a pair of enlarged edge portions 1 that can be fitted into the groove, and the contact surface of the dovetail groove M with the enlarged edge portion 1 is referred to as the enlarged edge portion. 1 is a tunnel segment that is formed in a tapered surface shape that makes the dovetail groove M approach the adjacent segment side as the fitting is performed along the dovetail groove M, and the plurality of the plurality of segments provided on the segment main body. In the dovetail part M, the connecting tool R is inserted in advance at an arbitrary selected position, and the operation of pushing the segment main body into the adjacent segment main body of the pre-inserted connecting tool R causes the adjacent segment main body to be inserted. The connecting tool R is inserted into the dovetail groove M of the segment body in which the connecting tool R to be inserted into the dovetail groove M is inserted in advance, and is generated in the connecting tool R when the segment body is pushed and connected. There is in the place where is provided with a reaction force receiving portion 9 receives a force.

A feature of the invention according to claim 5 is shown in FIGS.
As shown in the example, the dovetail groove M is embedded in the segment body F, the reaction force receiving portion 9 receiving the reaction force generated in the connecting tool R, and the segment main bodies F are pushed by the connecting tool R. Is formed by the connecting metal fitting 15 provided with a dovetail groove for attracting the light.

[0010] As described above, the reference numerals are used for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Operation and Effect] According to the first aspect of the present invention,
A reaction force receiving portion that receives a reaction force generated in the coupling tool by a pushing operation of the second segment main body is provided with the first and second reaction force receiving portions.
Since at least one of the dovetail grooves provided in the segment body is provided in the face-side dovetail portion of the second segment body, regardless of the contact position of the shield jack, the connecting tool is pushed through the reaction force receiving portion to push the segment. The main bodies can be attracted and connected. In other words, even if the connecting position of the shield jack is not located at the joint portion between the segment bodies and the connecting tool cannot be directly contacted with the shield jack and pushed in, the pushing operation of the second segment body causes the face-side ant. The face-side connecting member comes into contact with a reaction force receiving portion provided in the groove portion, and a pushing force on the second segment main body is transmitted to the connecting member by the reaction force receiving portion and pushed into the wellhead side in the dovetail groove portion. Acting as a force, the segment bodies can be attracted and connected. As a result, even if the contact position of the shield jack is deviated from the joint portion, the connector can be quickly pushed in without any trouble, and the segment bodies can be pulled and connected. Also, at this time, if a backup material is provided at the face side end of the connecting tool located on the reaction force receiving portion side in the face side dovetail portion, a certain tightening is performed when the tunnel segment bodies are attracted and connected. Power can be applied.

According to the second aspect of the invention, in addition to achieving the effects of the first aspect of the invention, the reaction force receiving portion is configured to be detachable from the segment main body. Therefore, even after the butting portions of the adjacent segment main bodies in the circumferential direction of the tunnel are butted, the connecting tool can be inserted from the face side. That is, since the reaction force receiving portion is provided on the face side and the pushing force to the segment body is transmitted to the connecting tool, for example, if the reaction force receiving portion is fixed to the segment body, the face of the segment body is Since it is not possible to provide an opening for inserting a connector at the side end portion, before the butting operation of the butting portions of the adjacent segment main bodies in the circumferential direction of the tunnel,
It is necessary to insert the connecting tool into the dovetail groove from the connecting tool insertion opening formed in the butting portion in advance, and with one end of the connecting tool protruding in the tunnel circumferential direction of the second segment body, It is necessary to push the second segment main body after the butting portions of the segment main bodies have been butted.
A displacement of the segment body occurs, and one end of the protruding connecting member contacts the first segment body and is damaged,
Due to the contact, the second segment main body may be inclined in the feeding direction, and the pushing operation may not be performed. However, in this case, the connecting tool can be inserted after the butting portions of the segment main bodies are butted, so that the connecting tool comes into contact with the first segment during the butting operation of the butting portions of the segment main bodies and is damaged. There is no danger that the work of pushing the second segment main body becomes impossible. As a result, in the connection work between the segment main bodies, the breakage of the connection tool and the work of pushing the second segment main body are not hindered, so that the workability of the connection work between the segment main bodies can be improved. became.

According to the invention of claim 3, claim 1 or 2
In addition to achieving the effects of the invention, when the connecting tool is provided in the dovetail, the connecting tool is filled by filling a gap formed between the connecting tool and the dovetail. Since the restricting member for restricting the change of the posture is provided, the connecting tool can be smoothly inserted into the dovetail part without falling down when connecting the segment bodies. That is, when the connecting tool is provided in the dovetail groove, the movement of the connecting tool is allowed by the gap formed between the connecting tool and the dovetail groove. The connector that fits into the segment becomes easy to fall over in contact with the segment body,
Although there is a possibility that the segment body cannot be pushed in, in this case, the connecting member can be prevented from falling down even if the connecting member comes into contact with the segment body by the regulating member, so that the connecting member can be smoothly fitted into the dovetail groove. It does not hinder the pushing operation of the segment body. As a result, the workability of the connection work between the segment main bodies can be improved.

According to the fourth aspect of the present invention, the connecting tool is inserted in advance into a selected one of the plurality of dovetails provided in the segment main body, and By pushing the segment main body into the adjacent segment main body, a connecting tool fitted into the dovetail groove of the adjacent segment main body is inserted into the dovetail groove of the segment main body in advance, and when the segment main body is pushed and connected, Since the reaction force receiving portion for receiving the reaction force generated in the connecting tool is provided, the segment main bodies can be connected to each other regardless of the contact position of the shield jack. In other words, even if the contact position of the shield jack is not located at the joint between the segment bodies,
A reaction force receiving portion is provided in a segment main body dovetail portion in which a connecting tool to be fitted into the dovetail groove portion of the existing segment main body is inserted and arranged in advance, and the connecting tool is pushed in with the operation of pushing the segment main body into the existing segment main body. Abuts against the reaction force receiving portion, and a pushing force on the existing segment main body is transmitted to the connecting tool by the reaction force receiving portion, and can act as an attraction force for attracting and connecting the segment main bodies. As a result, even if the contact position of the shield jack is deviated from the joint portion, it is possible to provide a tunnel segment that can quickly push the connecting tool without any trouble and can perform the pulling connection of the segment main bodies. became.

According to the fifth aspect of the invention, in addition to the effects of the first to third aspects of the invention,
A connection fitting in which the dovetail portion is provided with an anchor portion embedded in the segment body, a reaction force receiving portion for receiving a reaction force generated in the connection portion, and a dovetail groove for pulling the segment bodies together by pushing the connection portion. Therefore, in the concrete segment, the dovetail connecting portion having the reaction force receiving portion can be easily formed. That is, the butting surface of the connecting metal fitting comes to the butting end in the circumferential direction of the concrete segment body,
By merely embedding the anchor portion provided in the connection metal fitting in the concrete segment main body, the dovetail groove connection portion having the reaction force receiving portion at the butting end can be formed, as a result, the reaction force receiving portion can be formed. The workability of forming the concrete segment main body provided with the provided dovetail connection portion can be improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

The tunnel segment connecting tool R of the present invention
FIGS. 1 and 2 show an outline relating to a unit for forming a tunnel ring. In the present embodiment, the existing tunnel ring TR continuously constructed in an annular shape continuously in the tunnel circumferential direction X.
A segment body a and B segment body b
And a C-segment main body c are sequentially attached using a connecting tool R to construct a new tunnel ring TR. Here, the A segment main body a is a segment main body that is first attached to the existing tunnel TR.
That is, it is the segment main body that is connected first in the tunnel circumferential direction X when constructing a new tunnel ring TR. The B segment body b is a segment body sequentially connected in the tunnel circumferential direction X with the A segment body a interposed therebetween. Of the segment bodies forming one tunnel ring TR, the A segment body a and C described later are used. All the segment bodies except the segment body c are the B segment bodies b. The C-segment body c is a last-connected segment body for completing one tunnel ring TR. That is, the C
The segment body c is pushed into and connected to the gap formed by the two B segment bodies b. These segment bodies can be composed of various segments such as a concrete segment, a steel segment, and a composite segment of ductile and concrete, in addition to the ductile segment.

The segments A, B, and C are connected to each other using a connecting member R as shown in FIG. FIG.
Shows an aspect when the above-mentioned A, B and C segment bodies are connected.

As shown in FIG. 2, the connecting member R is substantially rectangular and has enlarged edges 1 at both edges along the pushing direction Z of the connecting member R. The two enlarged edges 1 are connected by a flat body 2. Each of the enlarged edges 1 is formed with a tapered holding portion 3 for actually attracting the segment bodies F to each other.
The interval between the holding portions 3 is configured to be wider on the opposite side of the pushing direction Z of the connecting tool R along the pushing direction Z. In the figure, reference numeral 6 denotes a gap S formed between the coupling tool R and the dovetail groove M when the coupling tool R is provided in the dovetail groove M so as to fill the gap S.
Is a regulating member that regulates a change in the attitude of the user.

On the other hand, at the ends of each of the A, B and C segment bodies in both ends in the tunnel circumferential direction X, there are provided butting portions 4 for connecting with adjacent segment bodies. In the butting portion 4, dovetail grooves M are formed at both ends along the tunnel longitudinal direction Y.
The dovetail portion M is formed with a to-be-held portion 5 with which the holding portion 3 comes into contact when the enlarged edge 1 of the connecting tool R is inserted into the dovetail groove.

The connection between the segment bodies is performed as follows. Here, the case where the A segment main body a and the B segment main body b shown in FIG. 3 are connected is taken as an example. FIG. 3 shows a state in which the A segment main body a is connected to the existing tunnel ring TR.
The description will be made assuming that the longitudinal direction Y of the tunnel in the drawing is the vertical direction and the circumferential direction X of the tunnel is the horizontal direction. In FIG. 3, the lower side is the face side of the tunnel shield, and the upper side is the wellhead side. Tunnel excavation is performed downward in FIG. Therefore, the B segment body b connected here
Is pushed upward in FIG. In the present embodiment, the direction in which the B segment main body b is pushed in is referred to as a wellhead side, and the opposite side is referred to as a face side. A dovetail groove M is formed at a total of four locations on both butting portions 4 of the A segment main body a. Of these, the existing tunnel ring TR
Are the wellhead-side dovetails M1 and the other two are face-face dovetails M2. The A segment body a
The wellhead-side dovetail part M1 is attached to the existing tunnel ring TR with the wellhead-side connecting tool R1 inserted. on the other hand,
Both the butting portions 4 of the B segment main body b connected to the A segment main body a also have a wellhead side dovetail groove M, respectively.
1 and a face-side dovetail groove M2. Where B
In the segment body b, the A segment body a
The face-face dovetail groove M2 of the butting part 4 is connected to the face-face dovetail groove M2, and the wellhead-side dovetail groove M1 of the other butting part 4 is provided with a wellhead-side connector R1.
As shown in FIG. 3, in the C segment main body c,
In each of the butting portions 4, the face-side dovetail portion M
2 is provided with a face side connecting tool R2.

When the B-segment body b is pushed in, the well-portion-side dovetail portion M1 of the B-segment body b is fitted into the wellhead-side connecting member R1 provided in the well-portion-side dovetail portion M1 of the A-segment body a. At the same time, the face-side coupler R2 provided in the face-side dovetail groove M2 of the B-segment body b is inserted into the face-side dovetail groove M2 of the A-segment body a. In this state, when the B segment body b is further pushed in, the respective connecting members R1 and R2 cause A
The segment body a and the B segment body b are attracted and connected. In this case, the wellhead-side connecting tool R1 can abut on the existing tunnel ring TR to obtain a pushing force, and the one face-side connecting tool R2 is pushed by pushing means such as a jack J of a tunnel shield. Get.

The connecting tool R according to the present invention includes a backup material T. The backup material T is provided at one end of the two enlarged edges 1, and the projecting direction thereof is set substantially parallel to the pushing direction Z of the connecting tool R. The reason why the backup material T is provided only on one of the enlarged edges 1 in this manner is that the connecting tool R is substantially pushed in by the reaction force receiving portion 9 formed in the face-side dovetail portion M2 of the B segment main body b.
And based on the wellhead side dovetail portion M1. As shown in FIG. 2, the backup material T may be attached and fixed to a concave portion 12 formed at the rear end of the enlarged edge portion 1, or may be attached and fixed using an adhesive or the like. You may. The backup material T may be provided at the rear ends of both enlarged edges 1. As shown in FIG. 2, the backup material T is formed of, for example, a hollow cylindrical member 16. The backup material T receives a predetermined pressing force from the existing tunnel ring TR in the case of the connecting tool R1, and receives a predetermined pressing force from the reaction force receiving portion 9 in the case of the connecting tool R2, as shown in FIG. Out of plane deformation. That is, when the connecting tool R is pushed in, the A segment main body a and the B segment main body b are gradually attracted, and accordingly, the force required to push the connecting tool R increases. During this time, the backup material T is elastically deformed. However, when the fastening force reaches a predetermined value, plastic deformation of the backup material T starts to occur. In this state, the fastening force of the connecting member R no longer increases, and the force for attracting the A segment main body a and the B segment main body b is kept constant.

As shown in FIG. 9, the shape of the dovetail groove M is such that the portions other than the clamped portion 5 of the connecting member R with respect to the holding portion 3 do not need to be in close contact with the connecting member R. It is formed by providing S. In this case, since the parts other than the clamped portion 5 are in the cast-free state, the cutting allowance of the clamped portion 5 is reduced, and the workability of the cutting operation is improved.

The dovetail-side dovetail portion M1 of the dovetail portion M
As shown in FIG. 8, an opening is formed at the wellhead side end 7 along the tunnel longitudinal direction Y, and the wellhead-side coupler R1 is inserted into the wellhead dovetail groove M1 from the opening side. It is pushed toward the center of the butting portion 4. The face-side dovetail portion M2 of the dovetail portion M has different shapes on the left and right along the tunnel circumferential direction X of the segment body F, and as shown in FIGS. 7 and 8, the first segment body F1 (the existing segment body). ) And a second segment body F2 that is later connected to the first segment body F1.
Of the face-side dovetail portion M2 located at the butting portion 4 with
The face-side dovetail groove M2 on the second segment body F2 side has an opening 10 for inserting a face-side coupler R2 at the abutting portion 4 with the first segment body F1, and the face-side end of the face-side dovetail groove M2. The portion 8 is provided with a reaction force receiving portion 9 for transmitting a pushing force generated by pushing the second segment body F2 to the face-side connecting member R2 via the backup material T. The face-side dovetail groove M2 on the first segment body F1 side is the face-side end 8 along the tunnel longitudinal direction Y similarly to the wellhead side dovetail groove M1.
The connector R2 provided in the face-side groove portion M2 of the second segment body F2 is pushed into the face side dovetail groove M1 of the first segment body F1 from the opening side by the pushing operation of the second segment body. , And pushed toward the center of the butting portion 4.

The principle of operation of the connecting member R when the B segment body b is pushed in will be described below. The combination of the two segment bodies to be connected is AB, BB, BC
In each segment body, the wellhead-side connecting tool R1 and the face-face-side connecting tool R2 are separately pushed in, but the operating principle of any of the connecting tools R is the same. In other words, the coupling tool R1 on the wellhead side comes into contact with the existing tunnel ring TR, and the coupling tool R2 on the face side comes into contact with the reaction force receiving portion 9 formed in the face side dovetail portion M2 by the pushing means J.

The first tunnel ring attached to the existing tunnel ring TR
Second using the connecting member R with respect to the segment body F1
The process of connecting the segment body F2 is described as the face side dovetail portion M
2 will be described. As shown in FIG. 6, of the second segment body F2, both of the face side connector R2 are clamped from the opening 10 for inserting the face side connector R2 formed in the butting portion 4 located on the first segment body F1 side. The holding portion 3 on the side provided with the backup material T among the portions 3 is inserted, and as shown in FIG. 7, the holding portion 3 on the side not provided with the backup material T is exposed in the face-side dovetail portion M2. To the side of the face. At this time, the regulating member 6 formed of a rubber material integrally formed with the connecting tool R2 fills the gap S formed between the face-side connecting tool R2 and the face-side dovetail groove M2, and The posture of the face-side coupler R2 is prevented from changing. Then, the clamping portion 3 of the face-side coupling tool R2 exposed by the pushing operation of the second segment body F2 by the shield jack J is inserted into the face-face dovetail groove M2 of the first segment body F1. The pushing force is applied from the reaction force receiving portion 9 formed on the second segment main body F2 via the backup material T provided on the face-side connector R2 to the face-side connector R2.
The two segment bodies F are connected to each other by sliding contact with the respective clamped parts 5 in the face-side dovetail groove M2 formed in the first and second segment bodies F1 and F2. You. At this time, the backup material T is constituted by a hollow cylindrical member 16 as shown in FIG. 2, and as shown in FIG. By
The fastening force can be maintained at a predetermined value. The shield jack J does not need to be located at the joint portion 11 between the segment bodies F and directly contact the face-side connecting member R2.
, The segment bodies F can be attracted and connected to each other only by pushing the.

[Another Embodiment] Another embodiment will be described below. <1> The reaction force receiving portion 9 is not limited to the one formed in the face-side dovetail portion M2 described in the above embodiment. For example, as shown in FIGS. A plate wall extending from the segment main body F2 to the first segment main body F1 may be used. In this case, if at least the backup material T is provided on the corresponding side, the backup material T will be located on the line of action of the pushing force by the second segment body F2.
Inconvenience such as rotation of 2 does not occur. At this time, the face side end 8 of the face side dovetail groove M2 of the first segment body F1.
It is necessary to form a concave portion for the plate wall forming the reaction force receiving portion 9. <2> The reaction force receiver 9 is not limited to the one integrally fixed to the second segment main body F2 described in the above embodiment. For example, as shown in FIGS. It may be formed detachably by a screw-type plug 19 or the like. That is, the female thread 17 is formed at the face end 8 of the face dovetail groove M2 of the second segment body F2, and the male screw 18 formed on the plug 19 is screwed and mounted to form a reaction force receiving portion. I do. With this,
Even after the butting portions 4 of the first and second segment bodies abut against each other, the connector R can be inserted into the face-side dovetail portion M2 of the second segment body F2 from the face side.
Further, a large opening (FIG. 6) for inserting the connecting member R is provided.
The opening 10 is not necessary, and the dovetail groove M2 can be reduced in size and weight. <3> Dovetail groove M used for concrete segment
Is, for example, as shown in FIG.
Among the connecting fittings buried in the butting portion 4 of the first and second segment bodies F2, the face side dovetail M1 and the wellbore dovetail M2 of the first segment body, and the wellbore dovetail part of the second segment body F2. For M2, use the connecting metal fitting 22 having an opening for fitting the connecting tool R into the respective face side end 8 or wellhead side end 7 along the tunnel longitudinal direction, and use the second segment body F2. The face-side dovetail M2 is provided with an opening 10 for inserting the face-side coupling R2 at the abutting portion 4 with the first segment body F1, and the face-side end 8 of the face-side dovetail M2 has A configuration using a connection fitting 23 formed by providing a reaction force receiving portion 9 for transmitting a pushing force due to the pushing of the second segment body F2 to the face-side connection tool R2 via the backup material T may be used. There. <4> Dovetail groove M used for concrete segment
For example, as shown in FIGS. 13, 14, and 15, an anchor portion 13 embedded in the segment body F and the connecting member R
And a dovetail groove M for attracting the segment bodies to each other by pushing the connecting tool R.
May be formed by the connection metal fitting 15 provided with. The operation of inserting the connecting tool R1 and the connecting tool R2 into the connecting fitting 15 is performed through an opening 10 formed in the connecting fitting 15. <5> The shape of the regulating member 6 is not limited to the shape described in the above embodiment, and for example, a shape having a protruding portion as shown in FIGS. The protrusion may be provided over the entire length of the connector R in the pushing direction Z of the connector R, or may be a part of the length. In short, the resistance at the time of connection between the first segment main body F1 and the second segment main body F2,
Any shape can be used as long as it can regulate its posture so that it does not fall. Further, instead of being provided on the connecting member R main body as shown in FIG. 18, a projecting portion may be formed in the dovetail groove M. The material is not limited to the rubber material, and any material can be used as long as the change in the posture of the connecting member R can be regulated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a connecting portion of a tunnel segment of the present invention.

FIG. 2 is a plan view showing a connector according to the present invention.

FIG. 3 is an explanatory view showing a connection state of various segment bodies.

FIG. 4 is an explanatory view showing a projecting member that is being deformed.

FIG. 5 is a perspective view showing a butted portion of a segment main body according to the present invention.

FIG. 6 is a partial cross-sectional view showing a mounting mode of the connector according to the present invention.

FIG. 7 is a partially cutaway sectional view showing details of a connecting process of the segment main body according to the present invention.

FIG. 8 is a partially cutaway cross-sectional view showing a connection mode of the segment main bodies according to the present invention.

FIG. 9 is a partially enlarged longitudinal sectional front view showing a connection mode using a connection tool according to the present invention.

FIG. 10 is an explanatory view showing another connection mode of the segment main body according to the present invention.

FIG. 11 is an explanatory view showing a connection mode of another example of the segment main body according to the present invention.

FIG. 12 is a perspective view showing a butt portion of another example of the segment body according to the present invention.

FIG. 13 is a perspective view showing a butt portion of another example of the segment main body according to the present invention.

FIG. 14 is a cross-sectional plan view showing a connection mode of another example of the segment main body according to the present invention.

FIG. 15 is a partially enlarged longitudinal sectional front view showing another example of a connection mode using the connection tool according to the present invention.

FIG. 16 is a connection explanatory view showing another example of the connection tool according to the present invention.

FIG. 17 is a connection explanatory view showing another example of the connection tool according to the present invention.

FIG. 18 is a connection explanatory view showing another example of the connection tool according to the present invention.

FIG. 19 is a connection explanatory view showing a connection example of a conventional example.

FIG. 20 is a connection explanatory diagram showing a connection example of a conventional example.

FIG. 21 is a connection explanatory diagram showing a connection example of a conventional example.

[Explanation of symbols]

 R Connecting tool X Tunnel circumferential direction Y Tunnel longitudinal direction F1 First segment main body F2 Second segment main body M Dovetail groove M1 Wellhead-side dovetail groove M2 Face-side dovetail groove R Connector R1 Wellhead-side dovetail groove R2 Face-side dovetail groove S Gap 4 Butt 6 Control member 7 Wellhead side end 8 Face side end 9 Reaction force receiving part 13 Anchor part 14 Dovetail groove 15 Connection metal fitting

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiyuki Aoki 7-1-22-2 Minamienkajima, Taisho-ku, Osaka-shi, Osaka Inside Kubota Enkajima Plant Co., Ltd. (72) Inventor Kazunori Tsujimoto Minami, Taisho-ku, Osaka-shi, Osaka 7-12-22 Enkajima F-term in Kubota Enkajima Plant (reference) 2D055 BA01 BB01 GC02 KB04 KB07

Claims (5)

[Claims] A second segment body is tunneled with respect to a first segment body that has already been constructed in order to construct a tunnel wall by pulling a plurality of tunnel segment bodies in a circumferential direction of the tunnel using a coupling tool and constructing a tunnel wall. In order to push in from the face side to the wellhead side along the longitudinal direction of
Each of the second segment main bodies is provided with a butt portion for coupling with each other at an end along the circumferential direction of the tunnel, and a pit-side dovetail portion is formed at the pit-side end of each of the butt portions, A face-side dovetail portion is formed at the face-side end portion of each of the butting portions, and a pair of enlarged portions that can be separately fitted along both opposing dovetail portions in a state where the first and second segment bodies are abutted. A tapered surface where the butting portions are relatively close to each other as the enlarged edge portion is fitted along the dovetail groove portion, and the abutting surface of each dovetail groove portion with the enlarged edge portion is provided integrally. Forming a connecting tool formed in a shape, and including a wellhead-side connecting tool in the wellhead-side dovetail portion of the first segment body;
A face-side connecting groove is also provided on the face-side dovetail portion of the second segment body, and a tunnel for connecting the first and second segment bodies by pushing the second segment body from the face side to the wellhead side. A reaction force receiving portion that receives a reaction force generated in the connecting tool by a pushing operation of the second segment body,
A connecting portion of a tunnel segment provided at least in a face-side dovetail portion of the second segment body, among the dovetail portions provided in the second segment body. 2. The connecting portion of a tunnel segment according to claim 1, wherein said reaction force receiving portion is detachably attached to said segment main body. 3. When the connecting tool is provided in the dovetail portion, a restriction is formed to fill a gap formed between the connecting tool and the dovetail portion and to prevent a change in posture of the connecting tool. The segment connecting portion for a tunnel according to claim 1 or 2, further comprising a member. 4. A plurality of dovetails for joining said adjacent segments at abutting portions with adjacent segments which are circumferentially adjacent to each other, and a pair of enlarged edges which can be fitted into said dovetails in a direction along a longitudinal direction of the tunnel. As the enlarged edge is fitted along the dovetail groove, the enlarged edge portion of the connecting tool for segment connection integrally including the portion and the contact surface of the dovetail groove portion with the enlarged edge portion are fitted. A tunnel segment formed in a tapered surface shape in which a groove portion is brought close to the adjacent segment side, and in the plurality of dovetail grooves provided in the segment main body, the connecting tool is previously placed at a selected arbitrary position. Inserting and inserting the segment body into the dovetail portion of the adjacent segment body by pressing the segment body into the adjacent segment body of the pre-inserted connector. A tunnel segment provided with a reaction force receiving portion for receiving a reaction force generated in the connecting tool when the segment body is pushed and connected in the dovetail groove portion of the segment body in which the connecting tool to be inserted is arranged in advance. 5. The dovetail groove includes an anchor portion embedded in the segment body, a reaction force receiving portion receiving a reaction force generated in the connecting tool, and a dovetail groove for pulling the segment bodies together by pushing the connecting tool. The tunnel segment connecting metal used for the connecting portion of the tunnel segment according to any one of claims 1 to 3, which is formed by the provided connecting metal.