JP3590122B2 - Segment for tunnel - Google Patents

Description

[0001]
[Industrial applications]
The present invention, both the abutment of the tunnel for the segments to be assembled adjacent to the circumferential direction, one can freely ant groove fitting of the pair of enlarged head portion of the ant member for segment concatenation, the butt portion provided along a longitudinal direction, segments husband the ants contacting the groove immediate relative jaws of the enlarged head of the ants member, said adjacent with said enlarged head to be fitted along the dovetail groove s The present invention relates to a tunnel segment which is formed in a tapered shape so that both butted portions are relatively close to each other.
[0002]
[Prior art]
Conventionally, in the above-mentioned tunnel segment, as shown in FIG. 11, for example, the butt portion 1a is a butt portion along the tunnel axis direction, the first dovetail groove portion 3a is on the wellhead side, and the second dovetail groove portion 3b is on the face side. At the same time, the contact surface of each of the first and second dovetails 3a and 3b is formed so as to be more inward from the butting portion 1a toward the inner side of the segment. Then, the second dovetail members 5B are fitted into the second dovetail grooves 3b from the face side (see, for example, JP-A-6-299796).
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned prior art, the dovetail members 5A and 5B need to be inserted into the dovetail grooves from both sides in the longitudinal direction of the butted portion (the wellhead side and the face side), and the segment assembling work becomes troublesome. In particular, since the already formed segments are arranged from the wellhead side, the work of inserting the dovetail members 5A and 5B is not easy, and the work efficiency of the tunnel lining work is low.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to solve the above-mentioned disadvantages of the prior art by inserting each dovetail member into each dovetail groove at both ends in the longitudinal direction of the butted portion of the segment. An object of the present invention is to provide a tunnel segment that can be performed from one side (for example, the face side) in the longitudinal direction of the butt portion.
[0005]
[Means for Solving the Problems]
A first characteristic configuration of the tunnel segment according to the present invention is that the dovetail portion is formed of first and second dovetail portions provided on both ends of the segment in the longitudinal direction of the butting portion, and the first and second dovetail portions are provided. Each contact surface is formed so as to be more distant from the butting portions toward the inner side of the segment, and the dovetail members fitted into the first and second dovetail portions are drawn along the butting portion longitudinal direction. A communication hole for inserting the rod body is provided over the first and second dovetail portions.
[0006]
[0007]
[Action]
According to the first characterizing feature of the segments for the tunnel according to the invention, constituted by a dovetail groove which faces abutted both abutting portions of the pair of tunnels for segment assembled by adjacent two segments respectively The abutment surfaces of the first and second dovetails respectively provided on both ends in the longitudinal direction of the butted portion are formed in a tapered surface shape in which the inner side of the segment is more distant from both butted portions. The enlarged head formed integrally with the second dovetail member and formed into a similar tapered surface is separately formed along the dovetail grooves of the first and second dovetail portions in a state where the two butted portions are abutted. In order to fit into the one side, the distal end of the rod inserted into the communication hole communicating with the first and second dovetails is connected to the connection part on the first dovetail member side, and the base end of the rod is inserted. Engages the fastening member The second dovetail member is moved toward the inner side of the segment while pulling the base end side of the rod body toward the outer side of the segment along the longitudinal direction of the butt portion with the fastening member and pulling the first dovetail member toward the inner side of the segment. Press
[0008]
[0009]
【The invention's effect】
Therefore, according to the first characteristic configuration of the tunnel segment according to the present invention, each dovetail member press-fitting operation at both ends in the longitudinal direction of the butting portion of the segment can be performed from one side (for example, the face side) in the longitudinal direction of the butting portion. Since the ant member press-fitting operation is performed from both sides (for example, the wellhead side and the face side) in the longitudinal direction of the butt portion as in the prior art, the segment assembling operation is troublesome. In particular, the already formed segments are arranged. This eliminates the problem that the work of press-fitting the dovetail member from the wellhead side is not easy, and thus a tunnel segment capable of improving the work efficiency of the tunnel lining work can be obtained.
[0010]
[0011]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 2, tunnels H is for tunnel segments (hereinafter, simply referred to as segment) set a plurality annularly along the tunnel circumferential direction, the lateral hole wall X by connecting fixing them together Is created by constructing
[0012]
In the Construction of the tunnel H, promote take propulsion reaction force cutter 2a on the tip portion, the shield tunnel boring machine 2 provided with a propulsion jack 2b on the rear end side, in segment 1 assembled to the lateral hole wall X while moving in the longitudinal direction by extension of the use jack 2b, dig the ground by rotating the cutter 2a to the tunnel axis P around promoting distance of one ring per segment 1 (typically, if a 100 cm / ring after promoting more), by contracting the propulsion jacks 2b, between the segment 1 of the propulsion jacks 2b and lateral holes wall X, will be installed sequentially segment 1.
[0013]
The segment 1 is made of cast, as shown in FIG. 1, it is formed in a shape curved along the tunnel circumferential direction. Further, both ends of the tunnel circumferential direction, and, at both ends of the tunnel axis direction, is provided with abutting portion 1a for segment 1 assembled by adjacent, 1b to each other, the butted portion 1a, 1b the butt portion 1a, over the entire circumference along 1b, the groove for the seal member installation to prevent water leakage from the segment 1 the back side to seal between the segment 1 adjacent to the tunnel H 1c is provided.
[0014]
State will now be described. Tunnel for the segments of this embodiment, as shown in FIGS. 3, 4 and 7, abutted both butt portion 1a of the pair of segments 1 to be assembled adjacent to the tunnel circumferential direction in opposing dovetail groove, the first provided in longitudinally defined end regions to each other both segment 1 each of the butted portion 1a, a second dovetail groove 3a, 3b is formed, the first and second dovetail groove 3a , 3b are respectively provided with first and second dovetail members 5A, 5B integrally provided with enlarged heads 4 which are individually fittable along both dovetail grooves facing each other in the butted state. The dovetail grooves 3a and 3b have a first dovetail groove 3a on the wellhead side and a second dovetail groove 3b on the face side.
[0015]
Each of the dovetail members 5A and 5B includes a flat dovetail body 5a, and the enlarged heads 4 each having a columnar and tapered shape along the longitudinal direction are separately provided on both sides of the dovetail body 5a. . Then, the enlarged head 4 of each of the first and second dovetail members 5A and 5B and the contact surface 6 of the first and second dovetail grooves 3a and 3b are fitted with the enlarged head 4 along the dovetail groove. With this, the butting portions 1a are formed in a tapered surface shape that is relatively close to each other. That is, the contact surface 6 of each of the first and second dovetail portions 3a and 3b is formed in such a shape that the inner side of the segment is more distant from the two butted portions 1a. The contact portion 4a on the side of the enlarged head 4 is also formed in such a shape as to be closer to the inner side of the segment than to the two butted portions 1a in accordance with the shape of the contact surface 6. Accordingly, the enlarged head 4 of each of the first and second dovetail members 5A and 5B is moved from the outer side of the segment toward the inner side along the contact surface 6 of each of the first and second dovetail grooves 3a and 3b. When they are fitted, the butting portions 1a are relatively close to each other.
[0016]
An elongated communication hole 7 communicating with the first and second dovetails 3a and 3b is provided, and a round bar 8 as a rod that can be inserted into the communication hole 7 is provided. A male screw portion 8a is formed on the distal end side of the round bar 8, and the female screw portion 5b to which the male screw portion 8a is screwed is used as a connecting portion for connecting with the distal end portion of the round bar 8. Groove 3a
Is provided on the first dovetail member 5A which can be fitted into the first dovetail member 5A.
[0017]
In addition, an insertion hole 5c through which the round bar 8 can be inserted is provided in the second dovetail member 5B which can be inserted into the second dovetail groove 3b, and the first dovetail member 5A is inserted into the segment along the longitudinal direction of the butting portion. In order to pull the second dovetail member 5B toward the inside of the segment while engaging with the base end of the round bar 8 and pulling the base end of the round bar 8 along the longitudinal direction of the butting portion toward the outside of the segment. A fastening member for pushing is provided. Specifically, a male thread 8b is formed at the base end of the round bar 8, and the fastening member 9 is constituted by a nut 9 screwed into the male thread 8b at the base end of the rod.
[0018]
Then, by using the segment for each member and the tunnel, as shown in FIG. 7, disposed adjacent a state where segments 1 are opposed to each other in the butted portion 1a, the distal end side of the first ant member of the round bar 8 5A, the base end side of the round bar 8 is inserted through the communication hole 7 and the insertion hole 5c of the second dovetail member 5B, and then engages with the nut 9 to form the first and second dovetail members. The enlarged heads 4 of 5A and 5B are fitted into the segments in the longitudinal direction of the butting portion with respect to the contact surfaces of the first and second dovetail portions 3a and 3b, so that the butting portions 1a are relatively opposed to each other. This results in a tunnel segment assembly structure that is as close as possible.
[0019]
Next, a first example of a tunnel segment assembling method using the tunnel segment will be described with reference to FIGS. First, as shown in FIG. 5, at one end side of the abutting the longitudinal direction of the disposed adjacent the two segments 1 (upper side in the drawing), the first ant member distal end side of the round bar 8 is connected The base end side of the round bar 8 is inserted into the communication hole 7 while inserting the 5A into the first dovetail groove portion 3a toward the inside of the segment. Then, in the butt the longitudinal direction of the other end side of both segment 1 (lower side in the drawing), while inserting a second dovetail member 5B toward the segment inward to a second dovetail groove 3b, round The base end of the rod 8 is inserted through the insertion hole 5c of the second dovetail member 5B. Next, as shown in FIG. 6, the nut 9 is received by the second dovetail member 5 </ b> B on the inner side of the segment and is engaged with the base end side of the round bar 8 so that the outer portion of the segment along the longitudinal direction of the butt portion is formed. (In this case, the nut 9 is rotated in the tightening direction using the tool 10), and the first and second dovetail members 5A and 5B are press-fitted into the first and second dovetail grooves 3a and 3b. I do.
[0020]
An example of another tunnel segment assembling method using the above-described tunnel segment will be described. According to the procedure shown in FIGS. 5 and 6, the first and second dovetail members 5A and 5B are press-fitted into the first and second dovetail grooves 3a and 3b to obtain the state shown in FIG. Next, as a second example, as shown in FIG. 8, the nut 9 is rotated in a direction opposite to the tightening direction by using the tool 10 and removed, and then, for example, a male screw portion on the base end side of the round bar 8 is removed. The male screw portion 8a on the distal end side of the round bar 8 is made into a female screw of the first dovetail member 5A by using a removal tool (not shown) at a portion having a semicircular cross section formed on the base end side further than 8b. Remove by rotating in the direction opposite to the direction of screwing into the part 5b. Thereby, the material cost can be reduced by repeatedly using the round bar 8 and the nut 9. A filler is injected into the first and second dovetail grooves 3a and 3b and the press-fitted portions of the first and second dovetail members 5A and 5B from the space from which the round bar 8 and the like are removed to reinforce the press-fit state. You may.
[0021]
In the first example , a male screw portion 8a is formed on the distal end side of the round bar 8, and a female screw portion 5b screwed to the male screw portion 8a is formed on the first dovetail member 5A to form a connection portion. However, in addition to this, as shown in FIGS. 9A and 9B as a third example, a head 8A for locking is formed on the tip side of the round bar 8 and the head 8A is engaged. The locking portion 5d for stopping may be formed on the first dovetail member 5A to serve as a connecting portion. Although not shown, the distal end side of the round bar 8 may be integrally fixedly connected to the first dovetail member 5A.
[0022]
Further, in the above embodiment, the male screw portion 8b is formed on the base end side of the round bar 8, and the fastening member is configured by the nut 9 screwed to the male screw portion 8b . As four examples, as shown in FIGS. 10A and 10B, a locking head 8B is formed on the base end side of the round bar 8, and the second dovetail member 5B is used to form the head on the inner side of the segment. may be in received was state constituting a fastening member in the fastening tool 11 for moving the head 8 B to the segments outward. Specifically, the engagement portion of the movable arm 11A provided in the fastening tool 11 is moved to the segment outward in a state where the locked to the head 8 B, first, second ant groove 3a, 3b The first and second dovetail members 5A and 5B are press-fitted.
[0023]
Further, in the above embodiment, the fastening member (nut 9) is engaged with the base end side of the rod body 8 in a state of being received by the second dovetail member 5B on the inner side of the segment so as to be drawn toward the outer side of the segment. but was, in addition to this, the fastening member also be pulled in (nut 9) the segment segment outer side engages received at the working face side of the end portion such as the base end side of the rod 8 of the 1 Good. In this case, it is necessary to push the second dovetail member 5B into the segment inside from the face side using a jack or the like.
[0024]
In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.
[Brief description of the drawings]
Perspective view Figure 2 is a longitudinal sectional view showing a shield tunneling [3] tunnel axis direction cross-sectional view showing a tunnel segment assembly structure showing tunnel for segment of the present invention; FIG 4 shows ants groove and FIG. 5 is a perspective sectional view showing a dovetail member. FIG. 5 is a plan sectional view showing a procedure of a first example of a tunnel segment assembling method. FIG. 6 is a plan sectional view showing a procedure of a first example of a tunnel segment assembling method. cross-sectional plan view showing the assembled structure FIG. 8 is a plan sectional view showing a second example of the tunnel segment assembly method [9] a cross-sectional plan view of a portion showing a connection portion and a rod of the same third example [10] the FIG. 11 is a partial cross-sectional plan view showing a fourth embodiment of a rod and a fastening member. FIG. 11 is a perspective view showing a conventional tunnel segment and a method of assembling the same.
DESCRIPTION OF SYMBOLS 1 Tunnel segment 1a Butt 3a First dovetail 3b Second dovetail 4 Enlarged head 5A First dovetail member 5B Second dovetail member
5a dovetail body 5b female screw part 5d locking part 5c insertion hole 6 contact surface 7 communication hole 8 rod 8a male screw part 8b male screw part 9 fastening member 9 nut 11 fastening member

Claims (1)

Both the abutment of the segments for assembled tunnel by circumferentially adjacent (1a), a pair of one is freely ant groove fitting the enlarged head (4) ant members for segment concatenation (5) ( 3), along a longitudinal direction of the butt section (1a) is provided,
The contact surface (6) of the dovetail groove (3) with the jaw of the enlarged head (4) of the dovetail member (5) is fitted with the enlarged head (4) along the dovetail groove (3). said adjacent segments (1) a tunnel for the segment is formed into a tapered surface shape so that both the abutment of the respective a (1a) is relatively close in association with,
The dovetail groove (3) is composed of first and second dovetail grooves (3a, 3b) provided at both ends of the segment in the longitudinal direction of the butting portion, and the first and second dovetail grooves (3a, 3b) respectively. The contact surface (6) is formed in such a shape that the inner side of the segment is more distant from the both butted portions (1a),
A communication for inserting a rod (8) for drawing the dovetail members (5) fitted in the first and second dovetail portions (3a, 3b) along the longitudinal direction of the butting portion (1a). A tunnel segment, wherein a hole (7) is provided over the first and second dovetail portions (3a, 3b).

Images