JPH1068294A - Wedge type segment joint for shield tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally connect connection end faces of both segments together at the inseparable locked state by inserting a male metal fitting buried in the segment into a female metal fitting at a segment connection section between the existing side and new side of a shield tunnel. SOLUTION: A steel female metal A fitting is buried in one of RC segments S1, S2 on the existing side and new side, and a steel male metal fitting B is buried in the other. When the stud bolt 25 of the male metal fitting B is forcibly inserted into the inner collet chucks 14a-14d of the female metal fitting A, an expansion anchor 33 is expanded along the conical outer peripheral face of a center pin 13, check pawls 32, 22 formed on the outer peripheral face of the stud bolt 25 and the inner peripheral faces of the inner collet chucks 14a-14d are meshed with each other, an intermediate flange 28 is received by the recessed step face 19 of an outer sleeve 11, and the RC segments S1, S2 are integrally connected at the inseparable locked state. The RC segments S1, S2 can be connected in a short time, and the high-rigidity connection state can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wedge-type segment joint for a shield tunnel.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. Hei 8-108 discloses a joint for connecting and fixing the joining end faces of an existing side (head side) segment and a new side (face side) segment used in a shield tunnel along the circumferential direction thereof. No. 4487 is known.

According to this, compared to the conventional example shown in FIGS. 22 and 23, it is sufficient to install one joint fitting (1) and one box punching part (7), and the length of the bolt (10) is increased. Is short,
It is described that the nut (11) is not required, and that there are various effects such as improvement in tensile / bending rigidity.

[0004]

However, in the case of the above-mentioned known invention, the segment (6) on the side where the fitting (1) is to be mounted is used.
Still needs to be provided with a box emptying portion (7). More than that, the box empty part (7)
Since the bolt (10) has to be screwed from the bolt hole (4) of the fitting (1) to the cap screw (16) of the insert (15) by a worker who inserts the segment (6). Can not be quickly and automatically connected and fixed.

In this regard, Japanese Patent Application Laid-Open No. 8-35399 discloses the first,
The purpose of the present invention is to automatically join two segments (1A) and (1B).
(1B) In addition to joining the insertion holes (10) so that they are in conformity with each other, it is necessary to insert a separate push rod (30) into the insertion hole (10) and push the fitting (20). There is still a lot of trouble.

The first engaging head (21) of the joint (20) is in the shape of a weight and elastically expands / contracts to the diameter of the first engaging head (21). Since the joint head (22) is supported by the rubber ring (elastic member) (23), the rigidity against the tensile force and the bending resistance at the joint are poor, and the openings of both segments (1A) and (1B) are provided. There is also a risk of water leakage due to this.

[0007]

SUMMARY OF THE INVENTION The present invention intends to drastically solve such a problem, and as a wedge-type segment joint for this purpose, a female fitting embedded in a joint end face of one segment and another female fitting are provided. Consisting of a pair of male fittings buried correspondingly to the joining end faces in the segments of

The male fitting is formed from a base sleeve of a fixed length and a stud bolt whose base end projects from the joint end face of the segment by implanting the base end into the hollow inside thereof in a threaded fastening state. While drilling the protruding tip of the stud bolt in a hollow state by a certain depth and providing a split groove for expansion, it is set as an expansion anchor,

The female fitting is formed as an outer sleeve having a fixed length substantially corresponding to the protruding length of the stud bolt and a tapered conical shape having a fixed length substantially corresponding to the drilling depth of the expansion anchor. Formed from a fixedly installed center pin and a plurality of radially symmetrical split types surrounding the center pin, an inner collet chuck similarly fitted and set in the hollow inside of the outer sleeve in a loose state, and Engrave a non-return claw that acts as a wedge on the peripheral surface,

As long as the stud bolt of the male fitting is inserted into the inner collet chuck of the female fitting, the expansion anchor is gradually pushed open by the center pin and expanded so as to bite the check pawl of the inner collet chuck. It is characterized in that the joint end faces of both segments are connected and integrated in a locked state that cannot be detached by plastic deformation.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wedge-type segment joint according to a first embodiment of the present invention; FIG. Is the RC on the existing side (wellhead side) of the shield tunnel
(Reinforced concrete) segment (S1) and RC (reinforced concrete) segment (S2) on the new side (face side)
Steel female metal fittings (A) embedded in either one of
And a pair of steel male fittings (B) which are also embedded and used on the other side. By forcibly inserting the male fittings (B) into the female fittings (A), both segments (S1) The joining end faces (a) and (b) of (S2) are connected and integrated in a locked state in which they cannot be detached.

That is, first, the female metal fitting (A) has a fixed length (L1) (for example, about 100 mm) as is apparent from FIGS.
And a cover plate (1) welded to one end (a back end from the joint end face (a)) of the outer sleeve (11) in the longitudinal direction (the propulsion direction of the shield excavator).
2) and a fixed length (L) from the cover plate (12) along the cylindrical core line of the outer sleeve (11).
2) A center pin (13) integrally and inwardly protruding (for example, about 45 mm) and the center pin (13)
A plurality of inner collet chucks (14a) and (14b) which are also set in the outer sleeve (11) in a loosely fitted state as a radially symmetric split type surrounding the inner sleeve.
(14c) and (14d).

The inner collet chuck (14a)
(14d) is a fixed length (L) shorter than the outer sleeve (11) and longer than the center pin (13).
3) (for example, about 75 mm). In this regard, FIG.
8 show a total of four inner collet chucks (14a) to (14d) divided into a cross shape,
At least two pairs suffice as long as they match the overall cylindrical shape.

In the first embodiment shown in FIGS. 1 to 19, a cover plate (12) of the outer sleeve (11) is provided.
The center pin (13) is assembled and fixed by a set screw (15). As is clear from the second embodiment shown in FIGS. 20 and 21, the cover plate (12) and the center pin (13) are previously secured. It may be formed as a single piece, and furthermore, as suggested from the third embodiment of FIGS. 22 and 23, welding means instead of the set screw (15) may be employed.

A plurality (three rows in total) of large-diameter mounting flanges (16) are welded to the outer peripheral surface of the outer sleeve (11) at regular intervals. The mounting flange (16) is welded to the anchor bar (17) of the segment (S1) as shown in FIGS. 16 to 18, and the segment (S1) is molded from a concrete into an arc plate, thereby forming the female member. The entire metal fitting (A) is embedded and integrated into the joint end face (a) of the segment (S1). In this regard, in the illustrated embodiment, the female fitting (A)
Is buried in the existing segment (headhole side) of the segment (S1).

The other end of the outer sleeve (11) in the longitudinal direction is open from the joint end face (a) of the segment (S1), and its entrance is provided with a stud bolt (described later) of a male fitting (B). The guide conical surface (18) for receiving and aligning the groove and the concave step surface (19) for receiving the large-diameter intermediate flange of the stud bolt are cut off in a communicating state.

The inner peripheral surface of the outer sleeve (11) has a conical groove surface (20) whose opening diameter gradually increases from the joint end surface (a) to the inner end (one end). On the other hand, the outer peripheral surfaces of the inner collet chucks (14a) to (14d) are also formed in a corresponding conical shape. When the inner collet chucks (14a) to (14d) are expanded by receiving stud bolts (described later) in the hollow interior, the outer peripheral surfaces of the inner collet chucks (14a) to (14d) are completely removed from the outer sleeve (11). Conical groove surface (2
According to 0), it is received and restrained from the back (around).

(21) The outer sleeve (11)
The inner collet is a retaining flange that projects inward from the boundary (near the entrance) between the concave stepped surface (19) and the conical grooved surface (20) in relation to the notch of both. The chucks (14a) to (14d) are prevented from falling out of the outer sleeve (11).

The outer peripheral surface of the center pin (13) is also formed in a tapered conical shape that is substantially parallel to the inner peripheral surface of the outer sleeve (11). It can be pushed and expanded gradually from.

That is, the outer diameter (D1) (for example, about 22 mm) of the center pin (13) at the projecting distal end is smaller than the opening diameter of the stud bolt at the projecting distal end, and the base end of the center pin (13) is also the same. The outer diameter (D2) (for example, about 28 mm) at the portion is dimensioned to be larger than the opening diameter on the protruding tip side of the stud bolt.

On the other hand, each inner collet chuck (14a) to (14d) surrounding the center pin (13).
Has a plurality of aligned, generally straight cylindrical shapes having an opening diameter (d1) (for example, about 3 mm).
7 mm) is slightly larger than the outer diameter of the protruding tip side of the stud bolt, so that the stud bolt can be received in the hollow interior of the inner collet chucks (14a) to (14d).

In addition, a saw-tooth-shaped check claw (22) having pull-out resistance is formed in the entire cylindrical inner peripheral surface of each of the inner collet chucks (14a) to (14d). . Although the claw shape or the tooth shape can smoothly receive the stud bolt of the male metal fitting (B), once the stud bolt is received, the stud bolt can perform a wedge action that does not retreat in the opposite disengaging direction at all. That is.

In this case, in the illustrated embodiment, the check pawl (2
2) is replaced with a plurality of inner collet chucks (14a).
Although it is processed as a continuous spiral state extending over (14d), it may be engraved in the non-spiral state as long as the wedge action is performed.

In the illustrated embodiment, the check pawl (22) is connected to each of the inner collet chucks (14a) to (14a).
(14d), the center pin (13) is engraved over the entire length thereof. However, only a part of the center pin (13) on the rear end side substantially corresponding to the fixed length (L2) is concentratedly engraved. You may.

Next, as apparent from FIGS. 9 to 15, the male fitting (B) has a base sleeve (23) having a fixed length (L4) (for example, about 80 mm) and a longitudinal direction (propulsion of a shield excavator). Cover plate (24) welded to one end (back end from the joint end face (b))
And a stud bolt (25) of a fixed length (L5) (for example, about 165 mm), which is also implanted and fastened from the other end (entrance) in the longitudinal direction to the hollow inside of the base sleeve (23) so as to be freely inserted and removed. In the implanted state, the stud bolt (25) is attached to the base sleeve (2).
From 3), the outer sleeve (1) of the female fitting (A) is used.
It will project correspondingly by the same length (L1) (about 100 mm) as 1).

A plurality of (three rows in total in the figure) large-diameter mounting flanges (26) are also welded to the cylindrical outer peripheral surface of the base sleeve (23) at regular intervals, and this is also a segment ( The segment (S2) is formed from concrete into an arcuate plate in a state where it is welded to the anchor bar (27) in S2). In the illustrated embodiment, the male fitting (B) is buried and used correspondingly to the joining end face (b) of the new side (face side) segment (S2) because of its pairing with the female fitting (A). I have.

The cover plate (24) of the base sleeve (23) prevents concrete from flowing into the base sleeve (23) when the segment (S2) is formed. (2
Instead of welding to 3), a synthetic resin cover plug (24a) as shown in the second embodiment of FIGS. 20 and 21 is inserted and fixed to the inner end of the base sleeve (23) in a covered state. May be.

The intermediate portion where the stud bolt (25) having the above-mentioned fixed length (L5) is located at the joining end face (b) of the segment (S2) can exhibit high shear and bending strength. The female metal fitting (A) is formed as a large-diameter intermediate flange (28) corresponding to the concave stepped surface (19) cut out at the entrance of the outer sleeve (11), and the large-diameter intermediate flange is formed. A male screw (29) is engraved on the outer peripheral surface on the far end side bounded by (28).

Since a female screw (30) which can be screwed with the male screw (29) of the stud bolt (25) is formed corresponding to the inner peripheral surface of the base sleeve (23), the stud bolt (25) is formed. (25) to the base sleeve (2
3) can be implanted in a screwed state. However,
The stud bolt (25) is implanted not at the time of molding or transporting the segment (S2) to the site, but at the time of site work of the shield method. This is to prevent the stud bolt (25) from accidentally breaking, being illegally deformed, or damaging other objects during transportation or the like.

The other end (entrance) in the longitudinal direction of the base sleeve (23) is open at the joint end face (b) of the segment (S2), and the female fitting (A) is inserted at the entrance. The concave step surface (1) of the outer sleeve (11) to be formed
Facing 9), a concave step surface (31) for receiving the large-diameter intermediate flange (28) of the stud bolt (25) in a sandwiched state is notched.

On the other hand, the outer diameter (D) of the protruding tip end with the intermediate flange (28) of the stud bolt (25) as a boundary.
3) (for example, about 35 mm) is slightly smaller than the opening diameter (d1) of the inner collet chucks (14a) to (14d) in the female fitting (A), and has an inner collet on its outer peripheral surface. Chuck (14
A saw-tooth check claw (32) capable of engaging with the check claw (22) of (a) to (14d) is also engraved.

The check pawl (3) of the stud bolt (25)
2) is the inner collet chuck (14a) to
It has a claw shape or tooth shape opposite to that of the check claw (22) of (14d), and as soon as it is plastically deformed into the engaged state, there is no danger of retreating in the mutual detaching direction, and a firm connection It will be locked in the state.

Moreover, the protruding tip of the stud bolt (25) serves as an expansion anchor (33) to serve as a female fitting (A).
Of the center pin (13) at a predetermined depth (L6) (e.g., about 50 mm) substantially corresponding to the length (L2) of the center pin (13), and a split portion for expansion from the front end side. The groove (34) is also cut out in a plurality of radially symmetric distribution types. In the illustrated embodiment, a plurality of the split grooves (34) are engraved in a cross shape as a whole.

(D2) shows the opening diameter (for example, about 24 mm) of the expansion anchor (33), which is the outer diameter (D) of the center pin (13) at the projecting distal end.
It is slightly larger than 1) and smaller than the outer diameter (D2) at the base end of the center pin (13).

Therefore, the stud bolt (25) of the male fitting (B) is a softer steel product than the center pin (13) and the inner collet chucks (14a) to (14d) of the female fitting (A). Together with this, the stud bolt (25) is relatively inserted into the hollow inside of the inner collet chucks (14a) to (14d) of the female fitting (A) from the expansion anchor (33) at the protruding tip. At this time, as the insertion progresses, the expansion anchor (33) is gradually and forcibly pushed open by the center pin (13) to expand, and the stud bolt (2) is expanded.
5) Check claw (32) and inner collet chuck (1)
As a result, the check claws (22) of 4a) to (14d) are plastically deformed into an engaged state.

Using the wedge-type segment joint of the present invention configured as described above, the joining end face (S1) of the existing side (head side) segment (S1) and the new side (face side) segment (S2) in the shield tunnel. a) (b) In connecting the comrades, the new side is inserted into the inner collet chucks (14a) to (14d) of the female metal fitting (A) embedded and integrated in the existing segment (S1). A stud bolt (25) protruding from the male fitting (B) embedded and integrated in the segment (S2) is connected to a shield jack attached to the tail of a shield excavator and an erector of an automatic segment assembling apparatus (both not shown). Then, just insert it forcibly.

Then, as apparent from FIGS. 16 to 19, the expansion anchor (33) forming the projecting tip of the stud bolt (25) gradually moves along the conical outer peripheral surface of the center pin (13). The check pawl (32) engraved on the outer peripheral surface of the stud bolt (25) is opened and pushed to the inner collet chuck (14a).
Check claw (22) engraved on the inner peripheral surface of (14d)
And at the end of the insertion, the large intermediate flange (28) of the stud bolt (25) is received by the concave step surface (19) of the outer sleeve (11). The side segment (S1) and the newly-installed side segment (S2) are connected and integrated in a locked state in which they cannot be detached by themselves through the wedge-type segment joint of the present invention.

At this time, stud bolts (2) for the inner collet chucks (14a) to (14d) are used.
The insertion of 5) and the engagement of the two non-return claws (22, 32) are determined by the degree of the degree of inclination, the inclination angle of the conical outer peripheral surface of the center pin (13) and the formation of the non-return claws (22, 32). It can be adjusted according to the roughness.

As shown in the second embodiment of FIGS. 20 and 21, a check pawl (35) is engraved on the conical outer peripheral surface of the center pin (13), and a check which can be engaged with the check pawl (35). Claws (36) can be correspondingly engraved on the inner peripheral surface of the expansion anchor (33) of the stud bolt (25), whereby the two segments (S1) (S
2) The connected and locked state can be kept more and more strong, and a high tensile rigidity can be obtained.

However, the expansion anchor (33), which is the projecting tip of the stud bolt (25), is gradually pushed open by the conical outer peripheral surface of the center pin (13) as the insertion is advanced, and the inner anchor is expanded. If the two segments (S1) and (S2) do not retreat in the disengaging direction by being kept in a plastically deformed state that results in biting the check claws (22) of the collet chucks (14a) to (14d). As shown in the third embodiment of FIGS. 22 and 23, the check pawl (32) against the outer peripheral surface of the stud bolt (25) is used.
You can omit the processing.

[0041]

As described above, the present invention provides, as a wedge-type segment joint for a shield tunnel, a female fitting (A) embedded in a joint end face (a) of one segment (S1) and a second segment (S1). S2) and a pair of male fittings (B) buried correspondingly to the joint end face (b),

The male fitting (B) is implanted into the base sleeve (23) having a fixed length (L4) and the base end thereof is screwed into the hollow inside, so that the tip end is a segment (S2). And a stud bolt (25) projecting from the joint end face (b) of the stud bolt (25).
Is formed as a dilatation anchor (33) by piercing the protruding tip of the dimple into a hollow state by a certain depth (L6) and providing a split groove (34) for dilation.

The female fitting (A) is connected to a stud bolt (2
An outer sleeve (11) having a fixed length (L1) substantially corresponding to the protruding length of 5), and a tapered conical shape having a fixed length (L2) substantially corresponding to a piercing depth (L6) of the expansion anchor (33). A center pin (13) fixedly installed in the hollow interior of the outer sleeve (11), and a plurality of radially symmetrical split types surrounding the center pin (13). The inner collet chucks (14a), (14b), (14c), and (14d) fitted and set in a loosely fit state are formed into the inner collet chucks (14a) to (14a).
A check claw (22) acting as a wedge is engraved on the inner peripheral surface of (14d),

The stud bolt (2) of the male fitting (B)
5) is replaced with the inner collet chuck (14) of the female fitting (A).
a) to (14d), the expansion anchor (33) is gradually pushed open by the center pin (13) to expand the inner collet chuck (1).
4a) to (14d) plastic deformation so as to bite the non-return claw (22), so that both segments (S1) and (S2)
Since the joint end surfaces (a) and (b) of the first and second joints are defined so as to be connected and integrated so as to be in a locked state in which they cannot be removed, the problems of the prior art described at the beginning can be completely solved, and both segments (S1) Although (S2) can be efficiently connected in a short time, there is an effect that a highly rigid connection state against a tensile force, a bending force, or the like can be maintained.

That is, according to the configuration of the present invention, the stud bolt (25) of the male fitting (B) is inserted into the inner collet chucks (14a) to (14d) of the female fitting (A). And just plug it in,
An expansion anchor (33), which is a projecting tip of the stud bolt (25), is gradually and forcibly pushed open by a tapered conical center pin (13) of the female fitting (A), and is expanded. (14a)-(1
4d) The plastic deformation is carried out so as to bite the check claw (22) and the lock is locked in a non-detachable connection state, so that the segments (S1) and (S2) of the shield tunnel are assembled automatically and quickly. Since there is no bolt box (box emptying portion), even when the secondary lining is omitted, the filling operation is not required.

Further, the stud bolt (25) of the male fitting (B) is implanted in a state of being screwed and fastened to the base sleeve (23), and the hollow of the outer sleeve (11) in the female fitting (A). Internal center pin (13)
And a plurality of inner collet chucks (14a) to (14d) enclosing the same, and the expansion anchor (33) of the stud bolt (25) is expanded by the tapered conical surface of the center pin (13). Then, the inner collet chucks (14a) to (14d) bite into the check claws (22) and are connected and integrated in a locked state in which they cannot be detached, so that the segment (S1)
Despite receiving the tensile force, bending / shear force, and unbalanced load of (S2), it exhibits high rigidity that can withstand these, and is remarkably excellent in strength and stability in a connected state.

In particular, if the structure of claim 2 is adopted,
An intermediate portion of the stud bolt (25) located on the joint end surface (b) of the segment (S2) is formed as a large-diameter intermediate flange (28), and the intermediate flange (28) is formed with a female fitting (A). ) Between the concave stepped surface (19) cut out in the outer sleeve (11) and the concave stepped surface (31) cut out in the base sleeve (23) of the male fitting (B). The stud bolt (25) can be given an increasingly higher bending rigidity because it can be received in a state, and the openings of both segments (S1) and (S2) and the risk of water leakage due to this can be reduced. Has the effect that it can be completely prevented.

According to the third aspect of the present invention, the back end of the outer sleeve (11) in the female fitting (A) and the back end of the base sleeve (23) in the male fitting (B) are: Each of the segments (S1) (S1) (S1) (S1) (S1)
The concrete cast as 2) does not flow into the hollow interior of the outer sleeve (11) or the base sleeve (23), and the male (B) and female (A) for the segments (S1) and (S2). Burial work can be performed quickly and safely.

Further, if the constitutions of claims 4 and 5 are adopted, there is an effect that the connected and locked state of both segments (S1) and (S2) can be kept more and more firm.

[Brief description of the drawings]

FIG. 1 is an overall schematic perspective view showing a wedge-type segment joint according to the present invention in an embedded state.

FIG. 2 is an oblique view showing a female fitting according to the first embodiment of the present invention.

FIG. 3 is a side view of the female fitting.

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a right side view of FIG. 3;

FIG. 6 is an enlarged sectional view taken along line 6-6 in FIG. 3;

FIG. 7 is an enlarged sectional view taken along line 7-7 in FIG. 3;

FIG. 8 is an enlarged sectional view taken along line 8-8 in FIG. 3;

FIG. 9 is a perspective view showing a male bracket of the first embodiment extracted therefrom;

FIG. 10 is a side view of the male fitting.

FIG. 11 is a right side view of FIG.

FIG. 12 is a left side view of FIG.

FIG. 13 is an enlarged sectional view taken along line 13-13 of FIG. 10;

FIG. 14 is an enlarged sectional view taken along line 14-14 of FIG. 10;

FIG. 15 is an enlarged sectional view taken along line 15-15 of FIG. 10;

FIG. 16 is a cross-sectional view showing a corresponding positional relationship between a female fitting and a male fitting.

FIG. 17 is a cross-sectional view showing a process of engaging the female metal fitting with the male metal fitting.

FIG. 18 is a cross-sectional view showing the connected and locked state following FIG. 17;

FIG. 19 is an enlarged sectional view taken along line 19-19 in FIG.

FIG. 20 is a sectional view corresponding to FIG. 16 and showing a second embodiment of the wedge-type segment joint according to the present invention.

21 is a cross-sectional view showing the locked state of FIG. 20.

FIG. 22 is a sectional view showing a third embodiment of a wedge-type segment joint according to the present invention and corresponding to FIG. 16;

FIG. 23 is a sectional view showing the connected and locked state of FIG. 22;

[Explanation of symbols]

 (11) Outer sleeve (12) Cover plate (13) Center pin (14a) Inner collet chuck (14b) Inner collet chuck (14c) Inner collet chuck (14d) Inner collet chuck (16) Mounting flange (17), anchor bar (19), concave step surface (22), check pawl (23), base sleeve (24), cover plate (24a), cover plug (25), stud bolt (26), Mounting flange (27), anchor bar (28), intermediate flange (31), concave step surface (32), non-return claw (33), expansion anchor (34), split groove (35), non-return claw (36)・ Non-return claw (A) ・ Female fitting (B) ・ Male fitting (S1) ・ Segment (S2) ・ Segment (a) ・ Joint end surface (b) ・ Joint Surface

Claims (5)

[Claims] 1. A female fitting (A) buried in a joining end face (a) of one segment (S1) and a male fitting (B) buried in a joining end face (b) of the other segment (S2). B), the male fitting (B) is fixed to the base sleeve (23) having a fixed length (L4), and the base end is implanted into the hollow portion thereof in a screwed-in state, so that the distal end is formed. A part is formed from a stud bolt (25) protruding from the joint end face (b) of the segment (S2). By providing a split groove (34) for the expansion anchor (33).
On the other hand, the female fitting (A) is fixed to the outer sleeve (11) having a fixed length (L1) substantially corresponding to the protruding length of the stud bolt (25), and the piercing depth (L) of the expansion anchor (33) is set.
A center pin (13) fixedly installed inside the hollow of the outer sleeve (11) as a tapered conical shape of a fixed length (L2) substantially corresponding to 6), and a plurality of pins surrounding the center pin (13). Inner collet chuck (14), which is also set in the hollow inside of the outer sleeve (11) in a mating state as a radially symmetric split type.
a) (14b) (14c) (14d) and the inner collet chucks (14a) to (14d)
A check claw (22) acting as a wedge is engraved on the inner peripheral surface of the metal fitting (B), and the stud bolt (25) of the male fitting (B) is inserted into the inner collet chucks (14a) to (14) of the female fitting (A).
d) as long as it is inserted into its extension anchor (3
3) is gradually pushed open and expanded by the center pin (13), and the inner collet chuck (14a) to
By plastically deforming so as to bite the check claw (22) of (14d), the joining end faces (a) and (b) of both segments (S1) and (S2) are connected and integrated in a locked state in which they cannot be released. A wedge-type segment joint for a shield tunnel, which is characterized in that: 2. A middle part in which the stud bolt (25) of the male fitting (B) is located on the joint end face (b) of the segment (S2) is formed as a large-diameter intermediate flange (28). Concave surface (31) for receiving flange (28)
Is cut at the entrance of the base sleeve (23), and the concave step surface (19) for receiving the intermediate flange (28) in a sandwiched state between the concave step surface (31) and the female metal fitting ( 2. The wedge-type segment joint for a shield tunnel according to claim 1, wherein the outer sleeve (11) in (A) is notched at an inlet portion thereof. 3. The base sleeve (23) of the male fitting (B) is welded to the anchor bar (27) of the segment (S2) by the mounting flange (26), and the back end of the base sleeve (23) is welded. The cover plate (24) or the cover plug (24a) is used to fix the outer sleeve (11) of the female metal fitting (A) with the anchor bar (17) of the segment (S1) by the mounting flange (16). At the same time as welding, the rear end of the outer sleeve (11) is fixed in a covered state with a cover plate (12), and the center pin (13) is fixed to the fixed length (L) from the cover plate (12).
2. The wedge-type segment joint for a shield tunnel according to claim 1, wherein only 2) projects inward and integrally. 4. A saw-tooth check which engages the check pawl (22) on the inner peripheral surface of the inner collet chucks (14a) to (14d) as a saw-tooth check. Nail (32)
With the expansion anchor (3) in the stud bolt (25).
The wedge-type segment joint for a shield tunnel according to claim 1, wherein the wedge-type segment joint is engraved on the outer peripheral surface of (3). 5. A center pin (13) having a tapered conical shape.
A serrated check claw (35) is engraved on the outer peripheral surface of the saw, while a serrated check pawl (36) engaging with the check claw (35) is provided.
With the expansion anchor (3) in the stud bolt (25).
3. The wedge-type segment joint for a shield tunnel according to claim 1, wherein the wedge-type segment joint is engraved on the inner peripheral surface of (3).