JP4751727B2 - Steel segment, shield tunnel lining structure using the same, and construction method thereof - Google Patents

Description

  The present invention relates to a steel segment applied to a shield tunnel, a shield tunnel lining structure using the steel segment, and a construction method thereof.

  Tunnels, especially road tunnels, of course, comfort and high speed as well as safety are of the utmost importance.For some large-scale road tunnels, ventilation facilities consisting of air blowers and dust collectors, There are emergency facilities such as emergency telephones, fire extinguishing facilities consisting of fire detectors, fire hydrants or water spray equipment.

  Of these, fire extinguishing facilities are designed to quickly extinguish when a fire breaks out in a tunnel, but people can be safe when an unforeseen event occurs, including such a fire. It is also important to be able to evacuate outside the tunnel.

  As such an evacuation facility, there is a shield tunnel in which an evacuation passage is provided below the roadway slab, that is, a space below the roadway slab in the middle of the shield cross section. You can evacuate outside the tunnel through the passage.

JP-A-11-71998

  In the above-mentioned shield tunnel, when an unexpected situation occurs on the roadway, a slide-like evacuation slope is provided on the side of the road as a means to get down to the evacuation passage. You can escape from the road.

  On the other hand, in constructing a tunnel by the shield method, it goes without saying that the larger the tunnel diameter is, the higher the cost is. It is desirable to make the tunnel diameter as small as possible for the same roadway width.

  However, as described above, the evacuation slope is provided on the side of the road, that is, along the inner peripheral surface of the tunnel. Therefore, in order not to interfere with the segments constituting the shield tunnel, the tunnel diameter is increased accordingly. Although the evacuation slope is necessary for safety, the tunnel diameter is increased for that purpose because there is room for consideration in terms of cost-effectiveness and interference with the evacuation slope. If the segment of the portion is cut out, the cross section is lost and the strength is lowered, and as a result, the earth pressure cannot be stably supported.

  The present invention has been made in consideration of the above-described circumstances, and uses a steel segment capable of stably supporting earth pressure and having an evacuation slope installed without affecting the shield diameter. An object of the present invention is to provide a shield tunnel lining structure and a construction method thereof.

  In order to achieve the above object, a steel segment according to the present invention is provided with at least two main girders curved according to a tunnel diameter and arranged in parallel to each other, and both ends of the main girders as described in claim 1. A steel segment comprising a pair of joint plates joined at substantially right angles and a skin plate provided on the convex side of the main girder, wherein at least one of the main girders is formed with a notch. The main girder main body and a main girder section formed so as to coincide with the shape of the notch and detachably connectable to the main girder main body.

  Further, the steel segment according to the present invention has a vertical rib disposed between the main girders so as to be orthogonal to the main girders, and a vertical rib body in which the notches are formed, and the shape of the notches The vertical rib piece and the main girder piece are integrated with each other, and the vertical rib piece is detachably connectable to the vertical rib body.

  The shield tunnel lining structure using the steel segment according to the present invention is characterized in that, as described in claim 3, at least two main girders that are curved and arranged in parallel with each other according to the tunnel diameter, A main girder having a pair of joint plates joined to both ends of the girder substantially at right angles and a skin plate provided on the convex side of the main girder, wherein at least one of the main girder is notched A steel segment formed to match the shape of the main body and the notch and configured to detachably connect to the main girder main body, and the main girder section with the main girder section removed. Escape slope installed so as to fit into the notch of the girder body, bending shear reinforcement means provided along the tunnel axis direction above and below the area where the steel segment is disposed, and the circumferential direction of the tunnel Along Provided with a compression reinforcement means formed respectively on the left and right of the region Te is obtained by joining the upper and lower ends of said compression reinforcing means and the left and right ends of the bending shear reinforcing means.

  In addition, the shield tunnel lining structure using the steel segment according to the present invention includes at least two main girders that are curved and arranged in parallel with each other according to the tunnel diameter. A main girder having a pair of joint plates joined to both ends of the girder substantially at right angles and a skin plate provided on the convex side of the main girder, wherein at least one of the main girder is notched The main girder is formed so as to coincide with the shape of the main body and the notch, and is constituted by a main girder section that can be detachably connected to the main girder main body, and is arranged between the main girder so as to be orthogonal to the main girder. The vertical rib section is composed of a vertical rib main body in which a notch is formed and a vertical rib section formed so as to match the shape of the notch and detachably connectable to the vertical rib main body. A steel cell integrated with the main girder section. And an escape slope installed so as to be fitted into a notch of the main girder body and the vertical rib body in a state where the main girder section and the vertical rib section are removed, and the steel segment is disposed. Bending shear reinforcing means provided respectively above and below the region along the tunnel axis direction, and compression reinforcing means provided respectively on the left and right sides of the region along the circumferential direction of the tunnel, and the bending shear reinforcing means And the upper and lower ends of the compression reinforcing means are joined.

  Further, the construction method of the shield tunnel lining structure using the steel segment according to the present invention is as described in claim 5, wherein at least two main girders are formed in a curved shape according to the tunnel diameter and arranged in parallel to each other. A pair of joint plates joined at substantially right angles to both ends of the main girder and a skin plate provided on the convex side of the main girder, and at least one of the main girder is notched. A steel segment formed of a main girder section that is formed so as to match the shape of the main girder body and the notch and is detachably connectable to the main girder body. Arranged in a connected state,

  In parallel with the step of arranging the steel segment, bending shear reinforcement means are provided along the tunnel axial direction above and below the region where the steel segment is arranged, and the region of the region is arranged along the circumferential direction of the tunnel. Provide compression reinforcement means on the left and right,

  Removing the main girder section from the main girder body;

  The evacuation slope is installed so that the evacuation slope is fitted into the notch of the main girder body.

  The shield tunnel lining construction method using the steel segments according to the present invention includes, as described in claim 6, at least two main girders that are curved and arranged in parallel according to the tunnel diameter. A pair of joint plates joined at substantially right angles to both ends of the main girder and a skin plate provided on the convex side of the main girder, and at least one of the main girder is notched. The main girder main body and the main girder section are formed so as to match the shape of the notch and are detachably connectable to the main girder main body, and between the main girder so as to be orthogonal to the main girder. The arranged vertical rib is constituted by a vertical rib main body formed with a notch and a vertical rib piece formed so as to match the shape of the notch and detachably connectable to the vertical rib main body. Integrate the rib piece and the main girder piece That the steel segment, arranged with the longitudinal ribs sections and the main girder sections in a state of being respectively connected to the longitudinal rib body and the main beam body,

  In parallel with the step of arranging the steel segment, bending shear reinforcement means are provided along the tunnel axial direction above and below the region where the steel segment is arranged, and the region of the region is arranged along the circumferential direction of the tunnel. Provide compression reinforcement means on the left and right,

The main girder section and the vertical rib section are removed from the main girder body and the vertical rib body, respectively.

  The evacuation slope is installed so that the evacuation slope is fitted into the notches of the main girder body and the vertical rib body.

  In the steel segment according to the present invention, the lining structure of the shield tunnel using the same and the construction method thereof, first, the steel segment according to the present invention is in a state where the main girder section is connected to the main girder body, or The main girder section and the vertical rib section are arranged on the inner surface of the tunnel in a state where they are connected to the main girder body and the vertical rib body, respectively.

  In disposing the steel segment according to the present invention on the inner surface of the tunnel, a known steel segment, that is, at least two main girders that are curved according to the tunnel diameter and arranged in parallel with each other and the main segment, as necessary. Known segments used in shield tunnels, such as steel segments, including steel segments having a pair of joint plates joined at substantially right angles to both ends of the spar and a skin plate provided on the convex side of the main spar ( (Hereinafter referred to as standard segment).

  On the other hand, along with the step of arranging the steel segment according to the present invention, bending shear reinforcement means are provided along the tunnel axis direction above and below the region where the steel segment is arranged, respectively, Compression reinforcement means are provided on the left and right sides of the above-described region along the direction. The left and right ends of the bending shear reinforcing means and the upper and lower ends of the compression reinforcing means are joined to each other.

  In this way, in the region where the steel segment according to the present invention is provided, the earth pressure from around the tunnel is once supported by the bending resistance or shear resistance by the bending shear reinforcement means, and then compressed and reinforced as an axial force. Will flow to the means and will be supported in a stable manner in combination with the compression resistance of the standard segment.

  Next, the main girder section is removed from the main girder body, and the attached longitudinal rib section is removed from the longitudinal rib body as necessary.

  Here, since the earth pressure is stably supported by the bending shear reinforcement means and the compression reinforcement means as described above, the main girder section and the longitudinal rib section can be safely removed.

  By the way, until the installation of the bending shear reinforcement means and the compression reinforcement means is completed, the main girder section and vertical rib section are connected to the main girder body and vertical rib body, and have the same strength as the standard segment. Therefore, the safety during the segment assembly is sufficiently ensured.

  Finally, the evacuation slope is installed so that the evacuation slope is fitted into the notch of the main girder body and the notch of the longitudinal rib body provided as necessary.

  For example, the bending shear reinforcing means may stiffen a portion that is aligned on the same line along the tunnel axis in the state of being assembled on the inner surface of the tunnel among the standard segment or the steel segment according to the present invention. For example, it is conceivable to increase the thickness of the member at such a location, or to insert groove steel, box steel, H-shape steel, or the like.

  In this way, even different segments are continuously stiffened along the same line along the tunnel axis, so that a reinforcing beam is formed.

  The compression reinforcing means can be configured, for example, by increasing the member thickness of the standard segment and continuously arranging it in the circumferential direction.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a steel segment according to the present invention, a shield tunnel lining structure using the same, and a construction method thereof will be described below with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

  1 to 3 are views showing a shield tunnel lining structure according to the present embodiment. The shield tunnel lining structure 1 according to this embodiment includes a steel segment 2, an escape slope 3 installed so as to be fitted into a notch formed in the steel segment, and a steel segment 2. Bending shear reinforcing means 4 and 4 provided above and below the region along the tunnel axis direction, and compression reinforcing means 5 and 5 provided respectively on the left and right of the region along the circumferential direction of the tunnel. In addition, the right and left ends of the bending shear reinforcing means 4 and 4 and the upper and lower ends of the compression reinforcing means 5 and 5 are joined.

  As shown in FIGS. 4 to 8, the steel segment 2 has a different notch at the place where it is in contact with the evacuation slope 3, so the steel segment 2 in FIG. 4 (the CC cross section in FIG. 3) The steel segment 2a will be described below.

  As shown in FIGS. 9 and 10, the steel segment 2a has three main girders 91a, 91b, and 91c that are curved and arranged in parallel with each other according to the tunnel diameter, and substantially perpendicular to both ends of the main girders. It is generally composed of a pair of joint plates 92a and 92b joined together and a skin plate 93 provided on the convex side of the three main girders 91a, 91b and 91c.

  Here, the main girder 91a is composed of a main girder body 101a in which a notch 102a is formed and a main girder segment 94a formed so as to match the shape of the notch. The main girder body 101a can be detachably connected via the connection plate 95a.

  The main girder 91b includes a main girder body 101b in which a notch 102b is formed, and a main girder piece 94b formed so as to match the shape of the notch. The main girder body 101b can be detachably connected via the connecting plate 95b.

  The main girder 91c is composed of a main girder body 101c in which a notch 102c is formed and a main girder segment 94c formed so as to match the shape of the notch. The main girder body 101c can be detachably connected via the connection plate 95c.

  On the other hand, vertical ribs are provided between the three main girders 91a, 91b, 91c so as to be orthogonal to the main girders, and the vertical ribs 96b, 96e are made of T-shaped steel. Is made of I-shaped steel without a flange in order to avoid interference with the evacuation slope 3.

  The vertical rib 96d is composed of a vertical rib main body 104 in which a notch 103 is formed, and a vertical rib piece 97 formed so as to match the shape of the notch. The vertical rib main body 104 can be detachably connected via the connecting plate 98.

  Similarly, the vertical rib 96f is composed of a vertical rib body 106 in which a notch 105 is formed, and a vertical rib piece 99 formed so as to match the shape of the notch. The vertical rib body 106 can be detachably connected via the connection plate 98.

  Here, the main girder piece 94b and the vertical rib piece 97 are integrated with each other in consideration of workability during attachment / detachment. Similarly, the main girder piece 94c and the longitudinal rib piece 99 are also integrated with each other.

  The main girder notches 102a, 102b, 102c and the longitudinal rib notches 103, 105 are fitted with the escape slope 3 with the main girder sections 94a, 94b, 94c and the longitudinal rib sections 97, 99 removed. The shape and dimensions are determined as appropriate so that they can be included. In addition, what is necessary is just to determine the shape and dimension of a notch suitably also for the other steel segments 2, so that the escape slope 3 can be inserted.

  11 and 12 show a front view and a detailed sectional view of the steel segment 2a. FIG. 13 shows the relationship between the steel segment 2a and the escape slope 3.

  Here, the steel segment 2a has the grooved steel 96a attached to the joint plate 92a side, but as shown in FIG. 3, the steel segment 2a is aligned on the same line along the tunnel axis. 2 or a standard segment, which are integrated to constitute the bending shear reinforcement means 4.

  On the other hand, the compression reinforcing means 5 is configured by increasing the member thickness of the standard segment and continuously arranging it in the circumferential direction.

  In order to construct the shield tunnel lining structure 1 using the steel segment according to the present embodiment, first, the steel segment 2 is connected with the main girder section connected to the main girder body or with the main girder section. The longitudinal rib sections are arranged on the inner surface of the tunnel in a state of being connected to the main girder body and the longitudinal rib body.

  In the example of the steel segment 2a, the main girder section 94a is connected to the main girder body 101a, the main girder section 94b is connected to the main girder body 101b, and the main girder section 94c is connected to the main girder body 101c. The section 97 is connected to the vertical rib body 104 and the vertical rib section 99 is connected to the vertical rib body 106.

  On the other hand, the bending shear reinforcement means 4 is provided along the tunnel axis direction above and below the region where the steel segment 2 is arranged, in tandem with such an arrangement process of the steel segment 2.

  In the case of this embodiment, if the grooved steel is mounted on the steel plate 2 and the joint plate side of the standard segment, and these segments are arranged so that the grooved steel is aligned in the tunnel axis direction, the bending shear reinforcing means 4 is naturally provided. It is formed.

  Moreover, the compression reinforcement means 5 is each provided in the right and left of the area | region mentioned above along the circumferential direction of a tunnel. The left and right ends of the bending shear reinforcing means 4 and the upper and lower ends of the compression reinforcing means 5 are joined to each other.

  In this way, in the region where the steel segment 2 according to the present embodiment is provided, the earth pressure from around the tunnel is once supported by the bending resistance or shear resistance by the bending shear reinforcement means 4 and then the axial force. It flows to the compression reinforcing means 5 and is supported in a stable form in combination with the compression resistance of the standard segment.

  Next, the main girder section is removed from the main girder body, and the attached longitudinal rib section is removed from the longitudinal rib body as necessary. In the example of the steel segment 2a, the main girder section 94a is removed from the main girder body 101a, the main girder section 94b is removed from the main girder body 101b, and the main girder section 94c is removed from the main girder body 101c. 97 is removed from the longitudinal rib body 104 and the longitudinal rib piece 99 is removed from the longitudinal rib body 106.

  Here, since the earth pressure is stably supported by the bending shear reinforcement means 4 and the compression reinforcement means 5 as described above, the main girder section and the longitudinal rib section can be safely removed.

  By the way, until the installation of the bending shear reinforcement means 4 and the compression reinforcement means 5 is completed, the main girder section and the longitudinal rib section are connected to the main girder body and the longitudinal rib body, and have the same strength as the standard segment. Therefore, safety during the assembly of the segment is sufficiently ensured.

  Finally, the evacuation slope 3 is installed so that the evacuation slope 3 is fitted into the notch of the main girder body and the notch of the longitudinal rib body provided as necessary.

  As described above, according to the steel segment 2 according to the present embodiment, the shield tunnel lining structure 1 using the same, and the construction method thereof, even when the steel segment 2 is notched, during segment assembly, The main girder section and vertical rib section are connected to the main girder body and vertical rib body, and have the same strength as the standard segment, so it is possible to ensure sufficient safety during segment assembly. In addition, after assembling the segment, the earth pressure from around the tunnel can be stably supported by the bending shear reinforcement means 4 and the compression reinforcement means 5, so that the main girder section and the vertical rib section can be removed from the main girder body and the vertical rib body. It can be removed.

  Therefore, it is possible to install an evacuation slope while stably supporting the earth pressure and without affecting the shield diameter.

Sectional drawing of the lining structure 1 of the shield tunnel using the steel segment which concerns on this embodiment. Sectional drawing in alignment with the AA of FIG. Sectional drawing which follows the BB line of FIG. Sectional drawing which showed the connection with the slope 3 for evacuation, and the segment 2. FIG. Sectional drawing which similarly showed the connection with the slope 3 for evacuation, and the segment 2. FIG. Sectional drawing which similarly showed the connection with the slope 3 for evacuation, and the segment 2. FIG. Sectional drawing which similarly showed the connection with the slope 3 for evacuation, and the segment 2. FIG. Sectional drawing which similarly showed the connection with the slope 3 for evacuation, and the segment 2. FIG. The whole perspective view of the segment 2a. The whole perspective view which showed a mode that the main girder piece and the vertical rib piece were removed from the segment 2a. The front view of the segment 2a. 12A is a cross-sectional view taken along the line C ″ -C ″ in FIG. 11; FIG. 11B is a cross-sectional view taken along the line C-C; FIG. 11C is a cross-sectional view taken along the line C′-C ′; . The whole perspective view which showed engagement with the segment 2a and the slope 3 for evacuation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shield tunnel lining structure 2, 2a Steel segment 3 Escape slope 4 Bending shear reinforcement means 5 Compression reinforcement means 91a, 91b, 91c Main girder 92a, 92b Joint plate 101a, 101b, 101c Main girder body 94a, 94b, 94c Main girder sections 102a, 102b, 102c Main girder notches 96b, 96c, 96d, 96e Vertical ribs 104, 106 Vertical rib bodies 97 Vertical rib sections 103, 105 Notches in vertical ribs

Claims (6)

At least two main girders that are curved according to the tunnel diameter and arranged in parallel to each other; a pair of joint plates that are joined at substantially right angles to both ends of the main girders; and a skin plate provided on the convex side of the main girders; A steel segment comprising at least one of the main girders, a main girder main body having a notch formed therein, and formed so as to match the shape of the notch. A steel segment characterized by comprising main girder sections that can be freely connected. A vertical rib disposed between the main girders so as to be orthogonal to the main girders, a vertical rib main body in which a notch is formed, and a vertical rib main body formed so as to match the shape of the notch The steel segment according to claim 1, wherein the steel segment is constituted by a freely connectable longitudinal rib piece, and the longitudinal rib piece and the main girder piece are integrated. At least two main girders that are curved according to the tunnel diameter and arranged in parallel with each other, a pair of joint plates joined at substantially right angles to both ends of the main girders, and a skin plate provided on the convex side of the main girders And having at least one of the main girders, a main girder body in which a notch is formed, and a main girder section formed so as to match the shape of the notch and detachably connectable to the main girder body A steel segment comprising: an escape slope installed to fit into a notch in the main girder body with the main girder section removed; and a region where the steel segment is disposed. Bending shear reinforcing means provided vertically along the tunnel axis direction, and compression reinforcing means respectively formed on the left and right sides of the region along the circumferential direction of the tunnel. Lining structure of the shield tunnel using steel segments, characterized in that joining the upper and lower ends of the right end and the compression reinforcing means. At least two main girders that are curved according to the tunnel diameter and arranged in parallel with each other, a pair of joint plates joined at substantially right angles to both ends of the main girders, and a skin plate provided on the convex side of the main girders And having at least one of the main girders, a main girder body in which a notch is formed, and a main girder section formed so as to match the shape of the notch and detachably connectable to the main girder body The vertical ribs disposed between the main girders so as to be orthogonal to the main girders are formed so as to coincide with the vertical rib main body in which the notches are formed and the shape of the notches. A steel segment composed of a rib main body and a longitudinal rib piece that can be detachably connected, and the vertical rib piece and the main girder piece are integrated, and the main girder piece and the vertical rib piece are removed. In the state of the main girder body and the vertical rib body An evacuation slope installed so as to be fitted into a notch, bending shear reinforcement means provided along the tunnel axis direction above and below the region where the steel segment is disposed, and the circumferential direction of the tunnel Compression shield means provided on the left and right sides of the region, and covering the shield tunnel using a steel segment, wherein the right and left ends of the bending shear reinforcement means are joined to the upper and lower ends of the compression reinforcement means Engineering structure. At least two main girders that are curved according to the tunnel diameter and arranged in parallel with each other, a pair of joint plates joined at substantially right angles to both ends of the main girders, and a skin plate provided on the convex side of the main girders And having at least one of the main girders, a main girder body in which a notch is formed, and a main girder section formed so as to match the shape of the notch and detachably connectable to the main girder body A steel segment composed of the main girder section connected to the main girder body,
In parallel with the step of arranging the steel segment, bending shear reinforcement means are provided along the tunnel axial direction above and below the region where the steel segment is arranged, and the region of the region is arranged along the circumferential direction of the tunnel. Provide compression reinforcement means on the left and right,
Removing the main girder section from the main girder body;
The construction method of the lining structure of the shield tunnel using the steel segment characterized by installing the evacuation slope so that the evacuation slope is fitted into the notch of the main girder body. At least two main girders that are curved according to the tunnel diameter and arranged in parallel with each other, a pair of joint plates joined at substantially right angles to both ends of the main girders, and a skin plate provided on the convex side of the main girders And having at least one of the main girders, a main girder body in which a notch is formed, and a main girder section formed so as to match the shape of the notch and detachably connectable to the main girder body The vertical ribs disposed between the main girders so as to be orthogonal to the main girders are formed so as to coincide with the vertical rib main body in which the notches are formed and the shape of the notches. A steel segment comprising a rib main body and a longitudinal rib piece that is detachably connectable, and the longitudinal rib piece and the main girder piece are integrated, and the main girder piece and the longitudinal rib piece are Connected to the girder body and the vertical rib body respectively Arrangement and,
In parallel with the step of arranging the steel segment, bending shear reinforcement means are provided along the tunnel axial direction above and below the region where the steel segment is arranged, and the region of the region is arranged along the circumferential direction of the tunnel. Provide compression reinforcement means on the left and right,
The main girder section and the vertical rib section are removed from the main girder body and the vertical rib body, respectively.
A method for constructing a shield tunnel lining structure using a steel segment, wherein the escape slope is installed so that the escape slope is fitted into the notches of the main girder body and the vertical rib body.

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