JP3590124B2 - 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 expansion large head ants member for segment concatenation, butt portion segment husband of provided along a longitudinal direction, the abutment of the ant groove for jaws of the enlarged head of the ants member, said adjacent with said enlarged head to be fitted along the dovetail groove The present invention relates to a tunnel segment formed in a tapered shape so that both butting portions are relatively close to each other.
[0002]
[Prior art]
In such a tunnel for the segments, conventionally, for example as shown in FIG. 7, a butt portion along the butted portion 1a of segment 1 to the tunnel axis direction, one of the ants groove 3a in wellhead side, other ants The groove portion 3b is provided on the face side, and the enlarged head 4 of each dovetail member 5A, 5B and the contact surface of each dovetail groove portion 3a, 3b are formed so that the inner side of the segment is more distant from both butted portions 1a. Each of the dovetail members 5A, 5B is inserted into each of the dovetail grooves 3a, 3b from both the wellhead side and the face side (see, for example, JP-A-6-299796).
[0003]
[Problems to be solved by the invention]
However, in the case of the above-described prior art, the dovetail members 5A and 5B are fitted into the dovetail grooves 3a and 3b at a plurality of locations (both ends on the wellhead side and the face side in FIG. 7) in the longitudinal direction of the butted portion. To do so, it is necessary to fit the dovetail members 5A and 5B from both the wellhead side and the face side, which complicates the assembling work of the segments, and particularly, the already formed segments are arranged on the wellhead side. Therefore, there is a problem that the work of inserting the dovetail member is not easy, and the work efficiency of the tunnel lining work is poor.
In addition, if a defect is found immediately after the assembly of the segment and the segment needs to be recombined immediately after the assembly, the segment immediately after the assembly cannot be disassembled without extracting the dovetail member 5A on the wellhead side. For this reason, there is also a problem that the segment rearrangement work is troublesome.
The present invention has been made in view of such a situation, and in order to solve the above-mentioned disadvantages of the prior art, it is easy to insert the dovetail members into the dovetail grooves at a plurality of positions in the longitudinal direction of the butted portions of the segments. It is an object of the present invention to provide a tunnel segment that can be easily assembled, the workability at the time of assembling the segments is improved, and the segment assembling work can be easily performed.
[0004]
[Means for Solving the Problems]
The tunnel segment according to the present invention (hereinafter, referred to as the present invention segment) is a tunnel segment having the above-described configuration, wherein the dovetail portion is provided on both ends of the segment in the longitudinal direction of the butt portion. The first and second dovetails are formed so that each of the contact surfaces of the first and second dovetails is further away from the two butted portions toward one side in the longitudinal direction of the butted portion. A concave portion for inserting the dovetail member from the segment inner peripheral side into the first dovetail portion on the side is opened at a longitudinally intermediate portion of the butting portion, and an end of the second dovetail portion on the other side in the longitudinal direction of the butting portion. A first characteristic configuration is that the portion is opened at the segment end surface on the other side in the longitudinal direction of the butting portion.
In addition, the segment of the present invention is a tunnel segment having the above-mentioned configuration, wherein the dovetail portion is constituted by a pair of first and second dovetail portions provided on both ends of the segment in the longitudinal direction of the butt portion. The contact surface of one of the first dovetails is formed so as to be more distant from the butting portions toward one side in the longitudinal direction of the butting portion, and the contact surface of the other second dovetail is formed by the length of the butting portion. The other side in the hand direction is formed so as to be more distant from the butting portions, and the dovetail member can be inserted into the first dovetail portion on one side in the longitudinal direction of the butting portion from the inner peripheral side of the segment. A second characteristic configuration is that a concave portion into which the dovetail member can be inserted from the inner peripheral side of the segment into the dovetail groove portion is opened at a longitudinally intermediate portion of the butting portion.
[0005]
[Action]
The above In the first invention segment with characteristic structure of, before Kia Li groove, the first pair provided in the segment at both ends of the abutting the longitudinal direction of, constituted by second dovetail groove, they A recess for forming the contact surface of the first and second dovetails in such a shape that one side in the longitudinal direction of the butting portion is farther away from both butting portions, and that the dovetail member is inserted into the first dovetail portion from the inner peripheral side of the segment. Is opened at the middle part in the longitudinal direction, and the end of the second dovetail is opened at the segment end face on the other side in the longitudinal direction of the abutting part, so that the dovetail member is inserted into the first dovetail. When inserting the dovetail member from the inner peripheral side of the segment via the concave portion, when inserting the dovetail member into the second dovetail portion, the dovetail member is inserted into the segment end on the other side. Can be easily inserted in an opening through the part, by the insertion of their two ants member, it is possible to perform a reliable assembling operation of the segment. Further, if a defect is found immediately after the assembly of the segment and the segment needs to be rearranged immediately after the assembly, the segment on the wellhead side (one side) can be used without disassembling the segment immediately after the assembly. The member can be easily pulled out through the concave portion, and the dovetail member on the face side (the other side) can be easily pulled out from the opening of the segment end face on the other side.
Further, in the present invention segment with the second characterizing feature is, before the Kia Li groove, the first pair provided in the segment at both ends of the abutting the longitudinal direction of, constituted by second dovetail groove The contact surfaces of the first and second dovetails are formed so as to be closer to one side or the other side in the longitudinal direction of the butted portion from both butted portions, and the dovetail member is segmented into the first and second dovetails. Since the concave portion for insertion from the inner peripheral side is opened at the intermediate portion in the longitudinal direction, when inserting the dovetail members into the first and second dovetail portions, respectively, the two dovetail members are removed from the inner peripheral side of the segment. The segments can be easily inserted through the recesses, and the insertion of the two dovetail members enables a reliable assembling operation of the segments. Furthermore, if a defect is found immediately after the assembly of the segment and the segment must be recombined immediately after the assembly, the two dovetail members can be connected via the recess without disassembling the segment immediately after the assembly. Can be easily extracted.
[0006]
【The invention's effect】
Therefore, according to the present invention, the work of inserting the dovetail member into each dovetail groove at a plurality of locations in the longitudinal direction of the butted portion of the segment can be easily performed from the face side (the other side), and the assembling work of the segment can be efficiently performed. In addition, the segment can be easily recombined, and the object of the present invention can be achieved.
Incidentally, expansion large head of the ants member may be a tapered cylindrical shape, and may be a simple cylindrical shape. It goes without saying that the shape of the dovetail portion is also set according to these shapes.
[0007]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those in the conventional example indicate the same or corresponding portions.
[0008]
As shown in FIG. 4, the tunnel H is segment tunnel (hereinafter, simply segments say) set one of a plurality annularly along the tunnel circumferential direction, their lateral hole wall X linked fixed to each other It is created by building.
In the Construction of the tunnel H, promotion of taking cutter 2a on the tip portion, the shield tunnel boring machine 2 provided with a propulsion jack 2b on the rear end side, a propulsion reaction force to 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, successively, it will set up the segment 1.
[0009]
The segment 1 is made of cast, it is formed into a shape curved along the tunnel circumferential direction as shown in FIG. 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, they butt portion 1a, 1b the butt portion 1a, over the entire periphery along 1b, and grooves 1c of the sealing material installed to prevent water leakage from the segment 1 the back side to seal between the segment 1 adjacent to the tunnel H It is provided.
[0010]
The process will be described below with reference to FIGS For a more detailed structure of the segments for the tunnel in the first embodiment, facing abutted both butt portion 1a of the pair of segments 1 to be assembled adjacent to the tunnel circumferential direction the dovetail groove, the two segments 1 each of the butted portion 1a plurality of ants groove 3 in the longitudinal direction of the plurality of locations (in Fig. 1 at both ends) is provided to each another (wellhead side (one side) the first ant groove 3a And the face side (the other side) is defined as a second dovetail groove 3b), and the first and second dovetail grooves 3a and 3b can be individually inserted along the both dovetails facing each other in the abutting state. A plurality of dovetail members integrally provided with a pair of enlarged heads 4 are provided. The plurality of dovetail members include a first dovetail member 5A corresponding to the first dovetail groove 3a and a second dovetail member 5B corresponding to the second dovetail groove 3b. The first dovetail member 5A is provided with a handle 5b (see FIGS. 1 and 2) that is used effectively when the dovetail member 5A is inserted into the first dovetail groove 3a and then removed. I have.
Each of the first and second dovetail members 5A and 5B is provided with a columnar and tapered enlarged head 4 on each side of a flat dovetail body 5a. Then, the enlarged head 4 of the first and second dovetail members 5A and 5B and the contact surfaces of the first and second dovetail portions 3a and 3b are fitted into the enlarged head 4 along the dovetail groove. Accordingly, the two butted portions 1a are formed in a tapered surface shape that is relatively close to each other. That is, the inner diameters of the first and second dovetails 3a and 3b are made smaller as the dovetail closer to one side in the longitudinal direction of the butting portion (that is, the wellhead side). The two dovetail grooves 3b are formed to have a smaller diameter than the inner diameter of the dovetail grooves 3b, and in each of the first and second dovetail grooves 3a and 3b, the contact surfaces thereof are closer to one side (that is, the wellhead side) in the longitudinal direction of the butting portion. It is formed in a shape away from the butting portion 1a. The contact portion 4a on the side of the enlarged head 4 is also formed in a shape that is more distant from the two butted portions 1a on the wellhead side (one side) in accordance with the shape of the contact surface. Therefore, the enlarged head 4 of each of the first and second dovetail members 5A and 5B is moved along the contact surface of each of the first and second dovetail grooves 3a and 3b from the face side (the other side) to the wellhead side (one side). Side) , the butting portions 1a are relatively close to each other.
Wherein the longitudinally intermediate portion of the abutting portion 1a of segment 1, the abutting one side of the longitudinal direction of (i.e., the wellhead side) within the first ant the the groove 3a second dovetail member 5A segment peripheral side of the A concave portion 7 for insertion from above is opened. The concave portion 7 is specifically a rectangular parallelepiped concave portion. Further, it said at segment 1 the other longitudinal side (i.e., the working face side) on the end face of the are is opened the end of the second dovetail groove 3b.
[0011]
According to such a segment of the present invention, when the first dovetail member 5A is inserted into the first dovetail groove 3a, the dovetail member 5A is easily inserted from the inner peripheral side of the segment via the recess 7 as shown in FIG. can do. Further, when inserting the second dovetail member 5B into the second dovetail groove 3b, the dovetail member 5B can be easily inserted through the opening at the end face on the segment face side (the other side) . Further, if a defect is discovered immediately after the assembly of the segment and the segment needs to be rearranged immediately after the assembly, the segment on the wellhead side (one side) can be used without disassembling the segment immediately after the assembly. The dovetail member 5A can be easily pulled out via the concave portion 7. This extraction work can be performed with good workability by using the handle 5b provided on the first dovetail member 5A. Also, the second dovetail member 5B on the face side (the other side) can be easily pulled out from the opening of the segment end surface on the other side.
[0012]
Next, a second embodiment will be described.
As shown in FIG. 5, the plurality of dovetails 3 are formed by a pair of first and second dovetails 3a and 3b provided on both ends of the segment in the longitudinal direction of the butting portion, and the first dovetail among them. The contact surface of the groove 3a is formed so as to be more distant from the two butting portions 1a toward one side in the longitudinal direction of the butting portion, and the contact surface of the other second dovetail groove portion 3b is formed in the other direction in the longitudinal direction of the butting portion. The ant member 5A can be inserted into the first dovetail groove 3a on one side in the longitudinal direction of the butt portion from the inner circumferential side of the segment, and the second In the second embodiment, a concave portion 7 into which the dovetail member 5B can be inserted from the inner peripheral side of the segment into the dovetail groove portion 3b is opened at a longitudinally intermediate portion of the butting portion 1a.
Incidentally, Ali member, as shown in FIG. 6, the ants member 5A, expansion large head A of 5B is formed in a mere cylindrical shape is also contemplated that the planar shape is in the form of a slanted roof . In this case, it goes without saying that the dovetail grooves into which the dovetail members 5A and 5B are inserted are also formed so that the simple columnar holes have the shape of a square in a plan view.
[0013]
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 showing an essential part of a first embodiment of the present invention; FIG segment FIG. 2 is an explanatory view of the inserted ants member to the first ant groove across the recess 3 is a perspective view showing a segment [ FIG. 4 is a sectional view showing a shield tunnel. FIG. 5 is a perspective view showing a main part of a second embodiment of the segment of the present invention. FIG. 6 is an explanatory view showing a dovetail member. FIG. Explanation diagram [Explanation of reference numerals]
DESCRIPTION OF SYMBOLS 1 Segment 1a Butt part 3 Dovetail part 3a First dovetail part 3b Second dovetail part 4 Enlarged heads 5A, 5B Dovetail member 7 Recess

Claims (2)

Both the abutment of the segments for assembled tunnel by circumferentially adjacent (1a), one of the pair of expansion large head (4) is freely ant groove fitting ants member (5) for segment concatenation and (3), provided along a longitudinal direction of the butt section (1a),
With the enlarged head (4) being fitted along the dovetail groove (3), the contact surface of the dovetail groove (3) with the jaw of the enlarged head (4) of the dovetail member (5) is fitted. 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,
The dovetail groove (3) is constituted by a pair 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) are provided. ), Each of the contact surfaces is formed in such a shape that one side in the longitudinal direction of the butt portion is further away from the two butt portions (1a);
A recess (7) for inserting the dovetail member (5A) from the inner peripheral side of the segment into a first dovetail groove (3a) on one side in the longitudinal direction of the butting portion, and a longitudinal middle portion of the butting portion (1a). And a second segment of the second dovetail groove (3b) on the other side in the longitudinal direction of the butt portion is opened to the segment end face on the other side in the longitudinal direction of the butt portion. Both the abutment of the tunnel for the segments to be assembled by the circumferentially adjacent (1a), opposite abutted to and, for segment concatenation ants member (5) a pair of which is provided integrally to expanding the large diameter head portion (4) one of which freely ant groove fitting of (3), provided along a longitudinal direction of the butt section (1a),
With the enlarged head (4) being fitted along the dovetail groove (3), the contact surface of the dovetail groove (3) with the jaw of the enlarged head (4) of the dovetail member (5) is fitted. 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,
The dovetail groove (3) is constituted by a pair of first and second dovetail grooves (3a, 3b) provided at both ends of the segment in the longitudinal direction of the butting portion, and one of them is the first dovetail groove (3a). ), The contact surface of the second dovetail portion (3b) is formed such that the one side in the longitudinal direction of the butting portion is further away from the two butting portions (1a), and the contact surface of the other second dovetail portion (3b) is The other side of the direction is formed so as to be farther from the butting portions (1a),
The dovetail member (5A) can be inserted into the first dovetail groove (3a) on one side in the longitudinal direction of the butting portion from the inner peripheral side of the segment, and the dovetail member (3B) can be inserted into the second dovetail groove (3b) on the other side. 5B) A tunnel segment in which a concave portion (7) into which a segment can be inserted from the inner peripheral side is opened at a longitudinally intermediate portion of the abutting portion (1a).

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