JP6780471B2 - segment - Google Patents

Description

The present invention relates to a segment in which a tunnel is constructed by connecting a plurality of them.

Conventionally, Patent Documents 1 to 3 have been disclosed for the purpose of surely improving the integrity of a steel shell having vertical ribs and concrete filled in a segment and increasing the ultimate yield strength of a synthetic segment. Synthetic segments have been proposed.

The synthetic segment disclosed in Patent Document 1 has a vertical rib fixed to a main girder and extends in the tunnel axial direction including a normal in the tunnel radial direction passing through the end portion of the vertical rib on the skin plate side. In a cross-sectional view in the tunnel axial direction, the center of at least one bent portion of the vertical rib and the empty end of the vertical rib in the tunnel extend in the tunnel axial direction including the normal in the tunnel radial direction. It is arranged on one side and the other side of the surface so as to sandwich the surface.

The synthetic segment disclosed in Patent Document 2 is a main girder in a steel-based segment composed of a main girder, a joint plate, a skin plate and a vertical rib, and a plurality of vertical segments spaced in the main girder longitudinal direction within the segment. The ribs are fixed, and the bar-shaped steel material is inserted through the openings provided in the vertical ribs, and the segment is filled with concrete so as to embed the vertical ribs and the bar-shaped steel material. ..

Japanese Unexamined Patent Publication No. 2008-297817 Japanese Unexamined Patent Publication No. 2004-270276 Japanese Unexamined Patent Publication No. 2000-291389

Here, the composite segments disclosed in Patent Documents 1 and 2 are connected to each other with other composite segments adjacent to each other in the axial direction and the circumferential direction of the tunnel, so that the tunnel is constructed. In the synthetic segments disclosed in Patent Documents 1 and 2, a substantially flat steel plate is used as each main girder and joint plate.

At this time, in the synthetic segments disclosed in Patent Documents 1 and 2, since each main girder and joint plate are formed in a substantially flat plate shape, the synthetic segments are connected to other synthetic segments adjacent to each other. The main girders or joint plates are brought into contact with each other on a substantially flat surface. For this reason, in the synthetic segments disclosed in Patent Documents 1 and 2, since the main girders or joint plates are only brought into contact with each other on a substantially flat surface, the integrity between the synthetic segments connected to each other is improved. It was an issue.

Further, in the synthetic segment disclosed in Patent Document 3, the connection of the opposing steel shell segments in the tunnel axial direction (between the segment rings) is made between the male side engaging member and the female side engaging member provided on the web of the steel shell side frame. It is performed by engaging with a member via a waterproof packing (sealing material). By simply providing the engaging portion, the integrity between the synthetic segments connected to each other is improved, but the processing of the segments is increased and the manufacturing cost is high.

Therefore, the present invention has been devised in view of the above-mentioned problems, and the object thereof is to increase the yield strength of each main girder plate or joint plate and to provide steel shells and filled concrete. The purpose of the present invention is to provide segments that can strengthen the integration, improve the integrity of a plurality of segments connected to each other, and reduce the manufacturing cost at the same time.

The segment according to the first invention is a segment in which a tunnel is constructed by connecting a plurality of segments, and is formed on a pair of main girder plates arranged at both ends in the axial direction of the tunnel and both ends in the circumferential direction of the tunnel. It is provided with a pair of joint plates to be arranged, and a steel shell filled with filled concrete is formed by being surrounded by the pair of the main girder plates and the pair of the joint plates, and the pair of the main girder plates. Is one end side main girder plate which is the main girder plate arranged on one end side in the axial direction of the tunnel, and the other end side main girder which is the other end side main girder plate arranged on the other end side in the axial direction of the tunnel. A main body portion extending in the normal direction of the tunnel is formed on the plate, and a fitting convex portion protruding from the main body portion in the axial direction of the tunnel is formed on the one end side main girder plate, and the tunnel is formed from the main body portion. A fitting receiving portion that sinks in the axial direction of the tunnel is formed on the other end side main girder plate, and is formed on the fitting convex portion formed on the one end side main girder plate and the other end side main girder plate. The fitting receiving portion is continuously formed at substantially the same position in the normal direction of the tunnel in the circumferential direction of the tunnel, and each of the main girder plates is locked to the filled concrete. One or both of the fitting convex portion and the fitting receiving portion are also formed on the inner side of the steel shell in the axial direction of the tunnel, and inside the steel shell, one of the pair of main girder plates is formed. It is characterized in that a slip-preventing member to be fixed or a reinforcing member erected on both of the pair of main girder plates is provided.

The segment according to the second invention is the segment according to the first invention, wherein the slip prevention member is formed on a skin plate and a main girder plate provided on either or both of the ground side and the inner air side in the normal direction of the tunnel. It is characterized in that a reinforcing material to be fixed or a reinforcing bar, a steel plate, a shaped steel, a stud with a head or a U-shaped gibber which is not fixed to the skin plate is used.

As for the segment according to the third invention, in the first invention, the slip-preventing member uses an L-shaped gibber bent in a substantially L-shape, and one side of the L-shaped gibber is the main girder. It is characterized in that it is fixed to the plate and a force distribution bar extending in the axial direction of the tunnel is connected to the other side which is the rest of the L-shaped gibber.

As for the segment according to the fourth invention, in the first invention, a deformed U-shaped gibber bent in a substantially U-shape is used as the slip-preventing member, and a part of the deformed U-shaped gibber is a tunnel method. A force distribution bar that is fixed to the main girder plate and the skin plate provided on either one or both of the ground side and the inner air side in the linear direction, and extends in the axial direction of the tunnel to the rest of the deformed U-shaped gibber. Is concatenated.

In any one of the second to fourth inventions, the segment according to the fifth invention is a pair in which the slip prevention member is fixed to each of the one end side main girder plate and the other end side main girder plate. It is characterized in that both ends of a force distribution bar extending in the axial direction of the tunnel are connected to the pair of slip prevention members.

The segment according to the sixth invention is characterized in that, in the first invention, the reinforcing member is made of a reinforcing bar, a steel plate or a shaped steel in which both ends in the axial direction of the tunnel are fixed to the pair of main girder plates. ..

As for the segment according to the seventh invention, in the first invention, the reinforcing member uses substantially flat plate-shaped vertical ribs in which both ends in the axial direction of the tunnel are fixed to the pair of main girder plates, and the shaft of the tunnel. It is characterized in that a notch portion is formed in which the lower end portion of the vertical rib is arranged on the ground side in the normal direction of the tunnel on the central side rather than both end sides in the direction.

In the seventh aspect of the invention, the segment according to the eighth aspect of the invention is formed such that the notch portion extends substantially linearly in the axial direction of the tunnel and is inclined substantially tapered from the notch portion to both ends. It is characterized in that it is formed by being formed.

In the seventh invention or the eighth invention, the segment according to the ninth invention is the vertical rib on the ground side in the normal direction of the tunnel and the inner air side on the inner air side in the normal direction of the tunnel. A vertical rib is provided together, and the ground-side vertical rib and the inner air-side vertical rib are arranged so as to be separated from each other in the normal direction of the tunnel.

The segment according to the tenth invention is characterized in that, in any one of the seventh invention to the ninth invention, the vertical rib is cut out at a corner portion on the ground side in the normal direction of the tunnel.

According to the first to tenth inventions, the fitting convex portion and the fitting receiving portion of each of the pair of main girder plates are formed in a shape corresponding to each other at substantially the same position in the normal direction. , It is possible to improve the integrity of a plurality of segments connected in the axial direction. Further, by using segment shaped steel having a predetermined cross-sectional shape for each main girder plate and forming a fitting convex portion and a fitting receiving portion, the out-of-plane direction and the in-plane direction of each main girder plate are formed. It is possible to improve the rigidity of each main girder plate and increase the yield strength of each main girder plate.

In particular, according to the second to fifth inventions, by providing a predetermined slip-preventing member inside the steel shell, the slip-preventing member is embedded in the filled concrete and locked, so that the filled concrete and the steel It is possible to exert the function of preventing slippage with the shell. Further, by connecting the force distribution bar to the slip prevention member, it is possible to further increase the yield strength of the segment at low cost without requiring the force distribution bar to have high cutting accuracy.

In particular, according to the sixth to tenth inventions, a predetermined reinforcing member is provided inside the steel shell, and the reinforcing member is erected to increase the yield strength of the filled concrete and to the main girder plate. It is possible to realize reliable load transmission and support a wide segment.

It is a perspective view which shows the tunnel constructed by the segment to which this invention is applied. It is a perspective view which shows the segment to which this invention is applied. It is an enlarged front view in the circumferential direction which shows the main girder plate of the segment to which this invention is applied. It is a front view in the circumferential direction which shows the state which the segment shaped steel formed asymmetrically as a main girder is used in the segment to which this invention is applied. It is a front view in the circumferential direction which shows the state which the segment shaped steel formed line-symmetrically as a main girder plate is used in the segment to which this invention is applied. It is an enlarged front view in the circumferential direction which shows the state in which the position of the centroid and the position of the center of gravity of the segmented steel used for the segment to which the present invention is applied substantially coincide with each other. It is an enlarged front view in the circumferential direction which shows the state which the centroid position and the center of gravity position substantially coincide with each other in the modified example of the segment shaped steel used for the segment to which this invention is applied. (A) is a side view showing a plurality of main steel materials and force distribution bars provided in a segment to which the present invention is applied, and (b) is a bottom view thereof. It is a front view in the circumferential direction which shows a plurality of main steel materials and a force distribution bar provided in the segment to which this invention is applied. (A) is a side view showing a slip prevention member of a headed stud provided in a segment to which the present invention is applied, and (b) is a bottom view thereof. (A) is a side view showing a slip prevention member of a steel plate provided in a segment to which the present invention is applied, and (b) is a bottom view thereof. It is a front view in the circumferential direction which shows the slip prevention member of the U-shaped gibber provided in the segment to which this invention is applied. It is a front view in the circumferential direction which shows the force distribution bar connected to the slip prevention member of the U-shaped gibber provided in the segment to which this invention is applied. (A) is a side view showing the arrangement of trapezoidal ribs in the segment to which the present invention is applied, and (b) is a front view in the circumferential direction thereof. (A) is a side view showing the arrangement of substantially hexagonal ribs in the segment to which the present invention is applied, and (b) is a front view in the circumferential direction thereof. It is a front view in the circumferential direction which shows the force distribution bar connected to the slip prevention member of the trapezoidal rib provided in the segment to which this invention is applied. (A) is a front view showing a slip prevention member fixed to a main girder plate of a segment shaped steel asymmetrically formed by a segment to which the present invention is applied, and (b) is a line-symmetrically formed segment. It is a front view which shows the slip prevention member fixed to the main girder plate of a shaped steel. It is a front view which shows the L-shaped gibber provided in the segment to which this invention is applied. It is a front view which shows the modified U-shaped gibber provided in the segment to which this invention is applied. It is a front view which shows the composite deformation gibber provided in the segment to which this invention is applied. (A) is a side view showing a plurality of slip prevention members having a reduced separation distance on the center side in the segment to which the present invention is applied, and (b) is a bottom view thereof. (A) is a side view showing the reinforcing member of the steel plate provided in the segment to which this invention is applied, and (b) is the bottom view. (A) is a side view showing a reinforcing member of a reinforcing bar provided in a segment to which the present invention is applied, and (b) is a bottom view thereof. It is a front view which shows the vertical rib in which the notch part was formed in the segment to which this invention was applied. It is a front view which shows the vertical rib which separated the vertical rib on the ground side and the vertical rib on the inner air side from each other in the normal direction in the segment to which this invention was applied. It is a front view which shows the vertical rib which corner part was cut out in the segment to which this invention was applied. (A) is a side view showing a plurality of reinforcing members in which the separation distance on the central side is reduced in the segment to which the present invention is applied, and (b) is a bottom view thereof. (A) is a side view showing a vertical rib in contact with a skin plate on the ground side in a segment to which the present invention is applied, and (b) is a bottom view thereof. (A) is a side view showing a vertical rib separated from a skin plate in a segment to which the present invention is applied, and (b) is a bottom view thereof. (A) is a side view showing a force distribution muscle separated from a vertical rib in a segment to which the present invention is applied, and (b) is a bottom view thereof. (A) is a side view showing a force distribution muscle abutting on a vertical rib separated from a skin plate in a segment to which the present invention is applied, and (b) is a bottom view thereof. (A) is a side view showing a force distribution muscle abutting on a vertical rib abutting on a skin plate in a segment to which the present invention is applied, and (b) is a bottom view thereof. It is a front view which shows the S-shaped gibber provided in the segment to which this invention is applied. It is a front view in the circumferential direction which shows the vertical rib provided in the segment to which this invention was applied, a plurality of main steel materials, and a force distribution bar. It is a front view which shows the state which a plurality of segments to which this invention was applied are connected in the axial direction. It is a front view which shows the modification of the state in which a plurality of segments to which this invention is applied are connected in the axial direction. It is an enlarged front view in the circumferential direction which shows the state in which each main girder plate of the segment to which this invention is applied is in contact with each other in the axial direction. (A) is an enlarged front view showing a water stop groove before the groundwater pressure acts on the segment to which the present invention is applied, and (b) is an enlarged front view showing the water stop groove after the groundwater pressure acts. It is a figure. It is an enlarged front view which shows the water stop groove formed independently from the fitting convex part or the fitting receiving part in the segment to which this invention is applied. (A) is a bottom view showing a main girder plate in which the central side in the circumferential direction is large and easily bent in the segment to which the present invention is applied, and (b) is a schematic plane showing a plurality of segments arranged in a substantially staggered pattern. It is a figure. It is a graph which shows the relationship between the deviation amount and manufacturing difficulty in the segment to which this invention is applied.

Hereinafter, a mode for carrying out the segment 1 to which the present invention is applied will be described in detail with reference to the drawings.

As shown in FIG. 1, in the segment 1 to which the present invention is applied, the tunnel 7 is constructed by connecting a plurality of segments 1 in the axial direction X and the circumferential direction Y of the tunnel 7.

The tunnel 7 is provided in an excavation hole formed by excavating a ground or the like by a shield method or the like, or an excavation hole formed by excavating a ground or the like. The tunnel 7 is, for example, formed in a substantially cylindrical shape in the axial direction X, but is not limited to this, and may be formed in a substantially square cylinder shape or the like.

In the tunnel 7, a plurality of segments 1 are connected in the circumferential direction Y, and a segment ring 70 is constructed. Further, the tunnel 7 is formed in a substantially cylindrical shape or the like in the axial direction X, which is the extension direction of the tunnel 7, by connecting the plurality of segment rings 70 in the axial direction X.

The tunnel 7 is constructed so as to separate the ground side Z1 and the inner air side Z2 in the normal direction Z which is the radial direction of the tunnel 7 by connecting a plurality of segment rings 70 in the axial direction X. Therefore, a predetermined internal space S is secured on the inner air side Z2 in the normal direction Z.

As shown in FIG. 2, the segment 1 to which the present invention is applied includes a pair of main girder plates 3 arranged at both ends in the axial direction X and a pair of joint plates 4 arranged at both ends in the circumferential direction Y. To be equipped.

In the segment 1 to which the present invention is applied, a pair of main girder plates 3 are arranged substantially parallel to each other at a predetermined interval in the axial direction X. Further, in the segment 1 to which the present invention is applied, the pair of joint plates 4 are arranged so as to be inclined to each other at a predetermined interval in the circumferential direction Y.

In the segment 1 to which the present invention is applied, both ends of the main girder plate 3 in the circumferential direction Y are joined to each other with both ends of the joint plate 4 in the axial direction X, so that the segments 1 are predetermined in the axial direction X and the circumferential direction Y. A substantially box-shaped steel shell 6 surrounded on all sides is formed on a pair of main girder plates 3 and a pair of joint plates 4 at intervals.

The segment 1 to which the present invention is applied is surrounded by a pair of main girder plates 3 and a pair of joint plates 4, so that a steel shell 6 in which the filling concrete 60 is filled in the inner portion 6a is formed. The segment 1 to which the present invention is applied is provided with a skin plate 5 so as to cover the inside 6a of the steel shell 6 on either one or both of the ground side Z1 and the inner air side Z2 in the normal direction Z, if necessary. Be done.

In the segment 1 to which the present invention is applied, in particular, the segment shaped steel 2 formed in a predetermined cross-sectional shape is used as each main girder plate 3, and the segment shaped steel 2 is formed by bending in the circumferential direction Y or the like. Will be done. Further, the segment 1 to which the present invention is applied may be used as each joint plate 4 without the segment shaped steel 2 being curved or the like, if necessary.

As shown in FIG. 3, each main girder plate 3 uses a segment shaped steel 2 formed in a predetermined cross-sectional shape, so that the main body portion 20 extends in the normal direction Z in the cross-sectional direction with respect to the circumferential direction Y. A fitting convex portion 21 having a convex shape in the axial direction X and a fitting receiving portion 22 having a concave shape in the axial direction X are formed.

In each main girder plate 3, a fitting convex portion 21 projecting from the main body portion 20 to the outside A in the axial direction X is formed on the main body portion 20 extending in the normal direction Z, and the fitting convex portion 21 is formed more than the fitting convex portion 21. A fitting receiving portion 22 arranged inside B in the axial direction X is formed.

Each main girder plate 3 has a curved shape such that a curved surface 2a having a substantially arcuate cross section is formed on the fitting convex portion 21 or the fitting receiving portion 22 as needed. Further, each main girder plate 3 becomes flat by forming a flat surface 2b such that the fitting convex portion 21 or the fitting receiving portion 22 has a substantially flat cross section, if necessary.

Here, in the pair of main girder plates 3, as shown in FIG. 4, the main girder plate 3 arranged on one end side in the axial direction X becomes the one end side main girder plate 31, and the other end side in the axial direction X. The main girder plate 3 arranged in is the other end side main girder plate 32, and the one end side main girder plate 31 and the other end side main girder plate 32 form a pair of main girder plates 3.

The one-end side main girder plate 31 protrudes toward the outer side A in the axial direction X, which is the opposite side of the inside 6a of the steel shell 6, to form a curved fitting convex portion 21, and the curved fitting. A flat fitting receiving portion 22 is formed on the inner side B in the axial direction X, which is on the inner side 6a side of the steel shell 6 with respect to the convex portion 21.

The other end side main girder plate 32 protrudes toward the outer side A in the axial direction X, which is the opposite side of the inner side 6a of the steel shell 6, to form a flat fitting convex portion 21 and to form a flat fitting. A curved fitting receiving portion 22 is formed on the inner side B in the axial direction X, which is on the inner side 6a side of the steel shell 6 with respect to the joint convex portion 21.

In the pair of main girder plates 3, a main body portion 20 extending in the normal direction Z is formed on each of one end side main girder plate 31 and the other end side main girder plate 32 arranged at both ends in the axial direction X. At this time, in the pair of main girder plates 3, a fitting convex portion 21 projecting from the main body portion 20 in the axial direction X is formed on the one end side main girder plate 31, and the fitting is recessed from the main body portion 20 in the axial direction X. The receiving portion 22 is formed on the other end side main girder plate 32.

In the pair of main girder plates 3, the curved fitting convex portion 21 of the one end side main girder plate 31 and the curved fitting receiving portion 22 of the other end side main girder plate 32 are mutually arranged in the normal direction Z. It is formed at substantially the same position. Further, in the pair of main girder plates 3, the flat fitting receiving portion 22 of the one end side main girder plate 31 and the flat fitting convex portion 21 of the other end side main girder plate 32 are in the normal direction Z. Are formed at substantially the same position as each other.

As shown in FIG. 3, each main girder plate 3 is curved or curved on each of both side surfaces of the main body 20 in the axial direction X by using the segment shaped steel 2 formed in a predetermined cross-sectional shape. A flat fitting convex portion 21 and a fitting receiving portion 22 are formed.

At this time, in each main girder plate 3, for example, a curved fitting convex portion 21 and a flat fitting receiving portion 22 are formed on one side surface 20a of the main body portion 20, and the other of the main body portion 20. A flat fitting convex portion 21 and a curved fitting receiving portion 22 are formed on the side surface 20b.

In each main girder plate 3, the curved fitting convex portion 21 on one side surface 20a of the main body portion 20 and the curved fitting receiving portion 22 on the other side surface 20b are substantially the same in the normal direction Z. Formed in position. Further, in each main girder plate 3, the flat fitting receiving portion 22 on one side surface 20a of the main body portion 20 and the flat fitting convex portion 21 on the other side surface 20b are substantially mutual in the normal direction Z. It is formed in the same position.

Each main girder plate 3 has one curved fitting convex portion 21 or a fitting receiving portion 22 on each of both side surfaces of the main body portion 20 at each of both end portions of the main body portion 20 in the normal direction Z. The flat fitting convex portion 21 or the fitting receiving portion 22 is formed at one place.

As shown in FIG. 4, for each main girder plate 3, segment shaped steel 2 asymmetrically formed in the axial direction X is commonly used for each of the pair of main girder plates 3. At this time, in each main girder plate 3, the fitting convex portion 21 on one side surface 20a of the main body portion 20 and the fitting receiving portion 22 on the other side surface 20b of the main body portion 20 are substantially the same in the normal direction Z. It will be formed in a curved or flat shape at the position of.

Each main girder plate 3 is not limited to this, and as shown in FIG. 5, segment shaped steel 2 formed line-symmetrically in the axial direction X may be used for each of the pair of main girder plates 3. .. At this time, in the segmented steel 2, the pair of flanges 25 extending in the axial direction X and the web 26 extending in the normal direction Z are combined to form the main body portion 20 extending in the normal direction Z.

When segment shaped steel 2 formed line-symmetrically in the axial direction X is used, each main girder plate 3 has a flat fitting convex portion 21 and fitting on both side ends of each of the pair of flanges 25. The receiving portion 22 is formed. At this time, in the pair of main girder plates 3, in particular, the fitting convex portion 21 of the one end side main girder plate 31 and the fitting receiving portion 22 of the other end side main girder plate 32 are substantially mutual in the normal direction Z. It is continuously formed at the same position in the circumferential direction Y.

As shown in FIG. 3, each main girder plate 3 has a main body portion 20 in the normal direction Z so that the centroid position and the center of gravity position of the segment shaped steel 2 substantially coincide with each other in the cross-sectional direction with respect to the circumferential direction Y. A fitting convex portion 21 and a fitting receiving portion 22 are formed at predetermined positions on both side surfaces of the main body portion 20 at each of both end portions of the main body portion 20. Here, the position of the center of gravity refers to the equilibrium point of the geometrical dimensions with respect to the axial direction X and the normal direction Z with respect to the cross-sectional direction with respect to the circumferential direction Y. Further, the centroid position refers to the equilibrium point of the first moment of the cross section with respect to the axial direction X and the normal direction Z with respect to the cross-sectional direction with respect to the circumferential direction Y.

As shown in FIG. 6, the segment shaped steel 2 has a deviation amount Δ of 8% or less in the axial direction X between the centroid position and the center of gravity position with respect to the total height H in the normal direction Z or the total width W in the axial direction X. At that time, the position of the center of gravity and the position of the center of gravity are substantially the same. It is desirable that the deviation amount Δ between the centroid position and the center of gravity position of the segmented steel 2 is 3% or less with respect to the total height H or the total width W.

The segment shaped steel 2 has, for example, a total height H = 225 mm in the normal direction Z and a total width W = 38 mm in the axial direction X. At this time, as shown in FIG. 6A, if the deviation amount Δ in the axial direction X is 0.055 mm, the segment shaped steel 2 has a deviation amount Δ in the axial direction X with respect to the total width W in the axial direction X. Is 0.14% (= 0.055 / 38 × 100) and the deviation amount Δ = 0 mm in the normal direction Z, so that the deviation in the normal direction Z with respect to the total height H in the normal direction Z Since the amount Δ is 0%, the position of the center of the figure and the position of the center of gravity are substantially the same.

If only the amount of deviation in the axial direction X is shown, the segmented steel 2 has an amount of deviation Δ = 0.160 mm as shown in FIG. 6 (b) and an amount of deviation Δ = 0 as shown in FIG. 6 (c). As shown in FIG. 6 (d), the deviation amount Δ is 8% or less in any case of .286 mm and the deviation amount Δ = 1.828 mm. Further, the segmented steel 2 has a deviation amount Δ = 0.527 mm as shown in FIG. 7 (a) and a deviation amount Δ = 0.923 mm as shown in FIG. 7 (b). When the deviation amount Δ is 8% or less, the position of the center of gravity and the position of the center of gravity are substantially the same. As shown in FIGS. 7 (c) and 7 (d), the segment shaped steel 2 may have a deviation amount Δ≈0.000 mm.

As shown in FIG. 8, the segment 1 to which the present invention is applied is provided with a plurality of main steel materials 63 extending in the circumferential direction Y at the inside 6a of the steel shell 6, and each main steel material extending in the axial direction X. A force distribution bar 64 that comes into contact with the 63 is provided. The plurality of main steel materials 63 are provided intermittently at about 6 points in the axial direction X by using reinforcing bars such as deformed reinforcing bars or deformed steel bars.

As shown in FIG. 9, the force distribution bar 64 is provided so as to surround a plurality of main steel members 63 by using reinforcing bars such as deformed reinforcing bars or deformed steel bars. At this time, as shown in FIG. 9A, the end portion of the force distribution muscle 64 on the ground side Z1 may be formed in a hook shape, and as shown in FIG. 9B, the ground side Z1 and the inside It may be formed so as to surround the main steel material 63 on the empty side Z2 all around.

In segment 1 to which the present invention is applied, a plurality of main steel materials 63 are integrated with a force distribution bar 64 to reinforce the filling concrete 60 in which the plurality of main steel materials 63 and the force distribution bars 64 are embedded. , It is possible to cope with a high load at a large depth loaded on the segment 1.

The segment 1 to which the present invention is applied is provided with a slip stopper 61 fixed to one of the pair of main girder plates 3 at the inside 6a of the steel shell 6 as shown in FIGS. 10 to 21. As shown in FIGS. 22 to 27, the segment 1 to which the present invention is applied may be provided with a reinforcing member 62 erected on both of the pair of main girder plates 3 inside the steel shell 6 6a. At this time, the segment 1 to which the present invention is applied is provided with either one or both of the slip prevention member 61 and the reinforcing member 62.

Here, as shown in FIGS. 10 to 21, only one end of the axial direction X of the slip prevention member 61 is fixed to each main girder plate 3 by welding or the like, and the other end of the axial direction X is fixed. One end is arranged so as to extend inside 6a of the steel shell 6 and is embedded in the filling concrete 60.

As shown in FIGS. 10 to 13, the slip stopper 61 is partially fixed to each main girder plate 3 by welding or the like, but is not fixed to the skin plate 5 by welding or the like. Shaped steel, headed studs or U-shaped girders are used.

As the anti-slip member 61, as shown in FIG. 10, a headed stud is used, and as shown in FIG. 11, a steel plate or the like formed in a substantially flat plate shape is used, and each of the pair of main girder plates 3 is used. Then, it is provided intermittently at about four places in the circumferential direction Y over about two steps in the normal direction Z. The slip stopper 61 is not limited to the headed stud and the steel plate, but a reinforcing bar such as a deformed reinforcing bar or a deformed bar steel, or a shaped steel such as an H-shaped steel, a channel steel or an angle steel is used. As the anti-slip member 61, as shown in FIGS. 12 and 13, a U-shaped gibber in which a reinforcing bar is bent into a substantially U-shape may be used, if necessary.

The slip stopper 61 projects to the inside 6a of the steel shell 6 in a state where a part 61a of the U-shaped gibber or the like is fixed to the main girder plate 3 and the remaining portion 61b of the U-shaped gibber or the like is not fixed to the skin plate 5. Is placed. In the slip prevention member 61, the remaining portion 61b of the U-shaped gibber or the like is embedded in the filling concrete 60 and locked, and a part 61a of the U-shaped gibber or the like is fixed to the main girder plate 3 to form the filling concrete. It is possible to exert a slip prevention function between the 60 and the steel shell 6.

It is desirable that the slip prevention members 61 are provided as a pair in the axial direction X by being fixed to each of the one end side main girder plate 31 and the other end side main girder plate 32. At this time, as shown in FIGS. 12B and 13, both ends of a force distribution bar 64 such as a reinforcing bar extending in the axial direction X are connected to each of the pair of slip prevention members 61. You may.

In the slip prevention member 61, a force distribution bar 64 is provided on either one or both of the inner air side Z2 and the ground side Z1, and both ends of the force distribution bar 64 are joined by welding, tied by a wire, or brought close to each other. It is connected in the state of only. Further, as shown in FIG. 13A, the slip prevention member 61 has both ends of the force distribution bars 64 on the inner air side Z2 or the ground side Z1 on one of the paired remaining portions 61b such as a U-shaped gibber. In addition to being connected, as shown in FIG. 13B, both ends of the force distribution bars 64 on the inner air side Z2 and the ground side Z1 are connected to both of the paired remaining portions 61b such as the U-shaped gibber. May be good. As shown in FIG. 12B, for example, the slip prevention member 61 is connected so that both ends of the force distribution bar 64 are erected on both of the pair of remaining portions 61b such as a U-shaped gibber. You may.

As shown in FIGS. 14 and 15, a reinforcing member 66 such as a triangular rib, a square rib, a trapezoidal rib, or a substantially hexagonal rib fixed to the skin plate 5 and the main girder plate 3 is used as the slip prevention member 61. You may. When a predetermined gap G is formed between the skin plate 5, the main girder plate 3 and the reinforcing member 66, and the anti-slip member 61 fills the inside 6a of the steel shell 6 with fresh concrete to be the filling concrete 60. , Fresh concrete can pass through the gap G. Then, in the slip prevention member 61, the reinforcing member 66 is fixed to the skin plate 5 and the main girder plate 3, so that the deformation of the skin plate 5 due to the placing pressure of the fresh concrete is suppressed.

Even when a reinforcing material 66 such as a triangular rib, a square rib, a trapezoidal rib, or a substantially hexagonal rib is used in the slip prevention member 61, both ends of the force distribution bar 64 are each reinforcing material as shown in FIG. It may be connected to 66. At this time, as the slip prevention member 61, as shown in FIGS. 16A and 16B, a force distribution bar 64 such as a reinforcing bar is used, and as shown in FIG. 16C, it is welded to the skin plate 5. Flat steel or the like fixed with or the like may be used as a force distribution bar 64 that also improves the rigidity of the skin plate 5.

As shown in FIG. 17A, the anti-slip member 61 is fixed to the side surface of the main body 20 of each main girder plate 3 in the main girder plate 3 of the asymmetrically formed segment shaped steel 2. If necessary, it is fixed to the skin plate 5. Further, as shown in FIG. 17B, the slip prevention member 61 is fixed to the web 26 of each main girder plate 3 in the main girder plate 3 of the segment shaped steel 2 formed line-symmetrically. Then, the slip prevention member 61 is fixed to the flange 25 on the ground side Z1 or the inner air side Z2 of the skin plate 5 or each main girder plate 3 as needed.

As shown in FIG. 18A, the slip-preventing member 61 uses an L-shaped gibber 81 bent in a substantially L-shape, and one side of the L-shaped gibber 81 that becomes a part 61a is the main girder plate 3. It may be fixed to. Then, as shown in FIG. 18B, the slip-prevention member 61 may be connected to the other side of the L-shaped gibber 81 which is the remaining portion 61b, even if the force distribution bar 64 extending in the axial direction X is connected. Good.

Further, as the slip prevention member 61, as shown in FIG. 19A, a modified U-shaped gibber 82 which is bent in a substantially U-shape and has an inclined portion may be used. At this time, a part 61a of the deformed U-shaped gibber 82 is fixed to the skin plate 5 and the main girder plate 3 provided on either one or both of the ground side Z1 and the inner air side Z2 on both sides of the inclined portion. You may. Then, in the slip prevention member 61, as shown in FIG. 19B, a force distribution bar 64 extending in the axial direction X is connected to the remaining portion 61b extending in the axial direction X of the deformed U-shaped gibber 82, if necessary. You may. The force distribution bar 64 connected to the deformed U-shaped gibber 82 may be fixed to the skin plate 5 on either one or both of the ground side Z1 and the inner air side Z2, if necessary.

Further, as shown in FIG. 20A, the slip prevention member 61 is a composite deformation formed so that each of the substantially U-shaped bent portion and the substantially S-shaped bent portion has an inclined portion. Gibel 83 may be used. At this time, a part 61a of the composite deformed gibber 83 is a substantially U-shaped bent portion and a substantially S-shaped bent portion, respectively, on either one or both of the ground side Z1 and the inner air side Z2. It may be fixed to the provided skin plate 5 and the main girder plate 3. Then, as shown in FIG. 20B, the slip-prevention member 61 is a force distribution bar extending in the axial direction X at a substantially S-shaped bent portion which is the remaining portion 61b of the composite deformation gibber 83. 64 may be concatenated.

The slip-preventing member 61 provided in the inner portion 6a of the steel shell 6 is mainly provided for the purpose of integrating the steel shell 6 and the filling concrete 60 in the tunnel tangential direction. At this time, the segment 1 to which the present invention is applied is subjected to this displacement deformation with respect to the behavior of causing the displacement deformation in the tunnel tangential direction between the steel shell 6 and the filling concrete 60 even when an external force of the tunnel is applied. The behavior of the so-called integral beam structure can be ensured by setting the above to substantially the same state. Then, the slip prevention rigidity that resists the slip deformation between the two can be appropriately adjusted by the number of the slip prevention members 61 according to the external force of the tunnel. The slip-prevention rigidity in the tangential direction of the tunnel has the effect of dramatically increasing the rigidity of the normal direction Z with respect to the external force of the segment 1, resulting in higher yield strength and higher rigidity of the tunnel segment, resulting in a thin wall of the tunnel segment. Can be achieved. As a result, it contributes to application to deep tunnels and reduction of tunnel outer diameter.

As shown in FIG. 21, the anti-slip member 61 is provided with a plurality of anti-slip members 61 separated from each other by a predetermined separation distance d in the circumferential direction Y inside the steel shell 6 6a. In the slip prevention member 61, the separation distance d1 on the central side of the circumferential direction Y in the inner 6a of the steel shell 6 is larger than the separation distances d2 and d3 on both ends of the circumferential direction Y in the inner 6a of the steel shell 6. It is desirable to be small.

As shown in FIGS. 22 and 23, the segment 1 to which the present invention is applied is provided with a predetermined reinforcing member 62 inside the steel shell 6 6a. In the reinforcing member 62, both ends in the axial direction X are fixed to the pair of main girder plates 3 by welding or the like, and the reinforcing member 62 is erected on the pair of main girder plates 3 inside the steel shell 6 6a. Embedded in. The reinforcing member 62 is erected inside 6a of the steel shell 6 to increase the yield strength of the filled concrete 60 and to reliably transmit the load to the main girder plate 3, so that the reinforcing member 62 also supports a wide segment 1. It becomes possible to do.

As the reinforcing member 62, as shown in FIG. 22, a steel plate or the like formed in a substantially flat plate shape is used, and as shown in FIG. 23, a deformed reinforcing bar or a reinforcing bar such as a deformed bar is used, and the normal direction Z It is provided intermittently at about four places in the circumferential direction Y over about two steps. Further, the reinforcing member 62 is not limited to the steel plate and the reinforcing bar, and a shaped steel such as an H-shaped steel may be used.

As shown in FIG. 24, when a steel plate formed in a substantially flat plate shape is used as the vertical rib 65, the reinforcing member 62 is located on the center side of both end sides in the axial direction X, and the lower end portion of the vertical rib 65 is the normal. A notch 62a arranged on the ground side Z1 in the linear direction Z may be formed. At this time, the vertical rib 65 is formed so that the notch 62a extends substantially linearly in the axial direction X on the central side in the axial direction X. Further, as shown in FIG. 24 (a), the vertical rib 65 is formed so as to be inclined substantially in a tapered shape from the notch 62a to both ends on both ends in the axial direction X, and is also shown in FIG. 24 (b). As described above, the cutouts 62a to both ends are formed substantially linearly on both ends in the axial direction X.

As shown in FIG. 25, when the vertical rib 65 formed in a substantially flat plate shape is used, the reinforcing member 62 has, for example, the ground side vertical rib 65a of the ground side Z1 in the normal direction Z and the normal direction Z. The inner air side vertical rib 65b of the inner air side Z2 may be provided together with the above. The vertical ribs 65 are arranged so that the vertical ribs 65a on the ground side and the vertical ribs 65b on the inner air side are separated from each other in the normal direction Z, and if necessary, the vertical ribs 65b on the inner air side are arranged on the inner air side Z2. A notch 62a is formed at the lower end of the.

As shown in FIG. 25A, the reinforcing member 62 is required to be fixed to the side surface of the main body portion 20 of each main girder plate 3 in the main girder plate 3 of the segment shaped steel 2 formed asymmetrically. It is fixed to the skin plate 5 according to the above. Further, as shown in FIG. 25B, the reinforcing member 62 is fixed to the web 26 of each main girder plate 3 in the main girder plate 3 of the segment shaped steel 2 formed line-symmetrically. Then, the reinforcing member 62 is fixed to the flange 25 on the ground side Z1 or the inner air side Z2 of the skin plate 5 or each main girder plate 3 as needed.

As shown in FIG. 26A, the reinforcing member 62 may have a predetermined gap G formed on the ground side Z1 by cutting out the corner portion of the vertical rib 65. At this time, as shown in FIG. 26B, in the reinforcing member 62, a part 61a of the slip prevention member 61 such as the L-shaped gibber 81 is fixed to the vertical rib 65 together with the main girder plate 3. May be done.

As shown in FIG. 27, the reinforcing member 62 may be provided with a plurality of reinforcing members 62 separated by a predetermined separation distance d in the circumferential direction Y inside the steel shell 6 6a. In the reinforcing member 62, the separation distance d1 on the central side of the circumferential direction Y in the inner 6a of the steel shell 6 is smaller than the separation distances d2 and d3 on both ends of the circumferential direction Y in the inner 6a of the steel shell 6. It is desirable to be.

As shown in FIGS. 28 and 29, the vertical ribs 65 are arranged by extending a steel plate formed in a substantially flat plate shape in the normal direction Z, and are intermittently provided at about four locations in the circumferential direction Y. Further, in the segment 1 to which the present invention is applied, as shown in FIGS. 30 to 32, the vertical rib 65 and the force distribution bar 64 may be provided together in the inner portion 6a of the steel shell 6, if necessary. .. At this time, as shown in FIG. 30, the force distribution muscle 64 may be provided so as to be separated from the vertical rib 65 in the circumferential direction Y, and as shown in FIGS. 31 and 32, the force distribution muscle 64 may be provided vertically from both sides in the circumferential direction Y. It may be provided in contact with the rib 65.

In the inner portion 6a of the steel shell 6, as shown in FIG. 33A, the skin plate 5 provided on either one or both of the ground side Z1 and the inner air side Z2 is substantially S inclined in the normal direction Z. The S-shaped gibber 84 bent in a shape may be fixed. At this time, the S-shaped gibber 84 is connected to the remaining portion 61b extending in the axial direction X of the deformed U-shaped gibber 82 and extends in the axial direction X, as shown in FIG. 33 (b). 64 may be concatenated. At this time, in the segment 1 to which the present invention is applied, the S-shaped gibber 84 is divided into parts, so that it is possible to improve the assembleability at the time of segment manufacturing.

As shown in FIGS. 20 and 33, the segment 1 to which the present invention is applied has an external load due to the substantially S-shaped bent portion of the composite deformed gibber 83 or the S-shaped gibber 84 being fixed to the skin plate 5. On the other hand, the effective width of the skin plate 5 to resist is expanded to enhance the load bearing performance of the segment 1, and the shear reinforcing performance of the concrete can be effectively improved against an external load. Further, in the out-of-plane deformation of the skin plate 5 due to the concrete placing pressure during segment manufacturing, the skin plate 5 near the center of the axial direction X is the most flexible, but it is a composite that is bent into an oblique material such as a substantially S shape. By resisting the deformed gibber 83 or the like in the vicinity of the main girder plate 3, it is possible to effectively suppress the bending deformation of the skin plate 5.

As shown in FIG. 30, in the segment 1 to which the present invention is applied, the force distribution bars 64 are provided apart from the vertical ribs 65, so that the space between the plurality of vertical ribs 65 is reinforced by the force distribution bars 64. It is possible to avoid the formation of a portion having a low yield strength in the filling concrete 60. Further, as shown in FIGS. 31 and 32, the segment 1 to which the present invention is applied is provided with the force distribution bar 64 in contact with the vertical rib 65, so that the main steel material 63, the force distribution bar 64, and the vertical rib are provided. It is possible to easily fix the 65 and the main girder plate 3 to provide a segment 1 having high integrity.

When the force distribution bars 64 are provided in contact with the vertical ribs 65 from both sides in the circumferential direction Y, as shown in FIG. 34A, a plurality of main steel materials 63 on the ground side Z1 and the inner air side Z2 are provided. By surrounding it, the main steel material 63 is sandwiched and restrained in the normal direction Z between the upper and lower ends of the vertical rib 65 and the force distribution bar 64. Further, as shown in FIG. 34 (b), the force distribution bar 64 bends the end portion in the normal direction Z in the circumferential direction Y, and the bent end portion of the force distribution bar 64 becomes the upper end portion of the vertical rib 65. You may be hooked.

In the segment 1 to which the present invention is applied, a skin plate 5 in which a substantially flat steel plate or the like is curved so as to cover the inside 6a of the steel shell 6 is provided on the ground side Z1. At this time, as shown in FIG. 29, the segment 1 to which the present invention is applied is provided with the upper end portion of the ground side Z1 of the vertical rib 65 in the normal direction Z separated from the skin plate 5 in the normal direction Z. Therefore, a predetermined gap G is formed between the skin plate 5 and the vertical rib 65.

In the segment 1 to which the present invention is applied, when a predetermined gap G is formed between the skin plate 5 and the vertical rib 65, and the inside 6a of the steel shell 6 is filled with fresh concrete to be the filling concrete 60. In addition, fresh concrete can pass through the gap G. Further, in the segment 1 to which the present invention is applied, as shown in FIG. 25, the vertical rib 65a on the ground side and the inner air side are fixed to the skin plate 5 to improve the rigidity of the skin plate 5. By forming a predetermined gap G by separating it from the vertical rib 65b, the fresh concrete can pass through the gap G. At this time, in the segment 1 to which the present invention is applied, it is possible to secure the fluidity of the fresh concrete in the gap G and improve the filling property of the steel shell 6 into the inside 6a.

Further, in the segment 1 to which the present invention is applied, the skin plate 5 and the vertical ribs 65 are separated from each other by forming a predetermined gap G between the skin plate 5 and the vertical ribs 65. As shown in FIGS. 14 and 15, a reinforcing material 66 such as a triangular rib, a square rib, or a trapezoidal rib connecting the skin plate 5 and the main girder plate 3 is appropriately arranged near the joint. Since the rigidity near the joint is increased, the effect of improving the performance of the segment 1 can be expected. Reinforcing members 66 such as triangular ribs, square ribs, and trapezoidal ribs can be appropriately arranged regardless of the presence or absence of the vertical ribs 65 to improve the performance of the segment 1.

Note that the segment 1 to which the present invention is applied is, if necessary, inside 6a of the steel shell 6 shown in FIGS. 8 to 34, with a slip prevention member 61, a reinforcing member 62, a main steel material 63, a force distribution bar 64, and a vertical bar. The filling concrete 60 is filled with the ribs 65 appropriately combined.

As shown in FIG. 35, the segment 1 to which the present invention is applied is the other end side main girder plate of another segment 1 which is connected to the one end side main girder plate 31 of a predetermined segment 1 adjacent to each other in the axial direction X. The 32s are brought into contact with each other, and the plurality of segments 1 are connected to each other.

As shown in FIG. 35A, the segment 1 to which the present invention is applied has the segment shaped steel 2 asymmetrically formed in the axial direction X shown in FIG. 4 common to each of the pair of main girder plates 3. By using them having substantially the same shape, a plurality of segments 1 are connected to each other.

Further, the segment 1 to which the present invention is applied is not limited to this, and as shown in FIG. 35 (b), the segment shaped steel 2 formed line-symmetrically in the axial direction X shown in FIG. 5 is formed by a pair of main girders. By using it for each of the plates 3, a plurality of segments 1 may be connected to each other.

Further, as shown in FIG. 35 (c), the segment 1 to which the present invention is applied includes the asymmetrically formed segmented steel 2 shown in FIG. 4 and the line-symmetrically formed segmented steel 2 shown in FIG. By using in combination with, a plurality of segments 1 may be connected to each other.

As shown in FIG. 36, the segment 1 to which the present invention is applied has one end side main girder plate in a state where the main girder plates 3 of other segments 1 connected adjacent to each other in the axial direction X are in contact with each other. The fitting convex portion 21 formed on the 31 and the fitting receiving portion 22 formed on the other end side main girder plate 32 of the other segment 1 are located at substantially the same positions in the normal direction Z in the circumferential direction Y. May be continuously formed. At this time, in the segment 1 to which the present invention is applied, in each of the segments 1 connected adjacent to each other in the axial direction X, the cross-sectional shapes of the main girder plates 3 at both ends of the axial direction X are unified, and the main girder plate is used. Only one type of cross-sectional shape of 3 can be used.

As a result, the segment 1 to which the present invention is applied requires only one type of cross-sectional shape of the main girder plate 3, so that the number of manufacturing jigs can be reduced in the production of the main girder plate 3, and the manufacturing cost can be suppressed. .. Further, since the orientation of the main girder plate 3 can be unified even at the time of assembling the segment 1 to which the present invention is applied, it is possible to reduce the material management and the labor at the time of assembling.

Further, in the segment 1 to which the present invention is applied, when the segment shaped steel 2 shown in FIG. 7 (b) is adopted as the main girder plate 3, as shown in FIG. 36 (a), one end side main girder plate 31 and The other end side main girder plate 32 is arranged point-symmetrically with respect to the center point in the cross section of the segment 1 in the circumferential direction Y. At this time, in the segment 1 to which the present invention is applied, since the fitting convex portions 21 locked to the filling concrete 60 are arranged at both ends in the normal direction Z, the filling concrete 60 is placed in the normal direction Z. The effect of sandwiching is obtained, and the steel shell 6 and the filling concrete 60 can be more firmly integrated. Further, since the fitting convex portions 21 on the surface that comes into contact with the filled concrete 60 are arranged only at both ends of the main girder plate 3 in the normal direction Z, the vertical ribs 65 and the like shown in FIGS. 8 to 34 are arranged. It becomes possible to reduce the manufacturing cost of the segment 1.

Here, in the segment 1 to which the present invention is applied, as shown in FIG. 37, the main girder plates 3 are brought into contact with each other at both ends in the axial direction X, and the fitting convex portions of one main girder plate 3 are brought into contact with each other. By fitting 21 to the fitting receiving portion 22 of the other main girder plate 3, a plurality of segments 1 are connected to each other.

At this time, in the segment 1 to which the present invention is applied, in particular, the curved fitting convex portion 21 of the one end side main girder plate 31 and the curved fitting receiving portion 22 of the other end side main girder plate 32 are formed. By being formed at substantially the same position in the normal direction Z, the curved fitting convex portion 21 is securely fitted into the fitting receiving portion 22. Further, in the segment 1 to which the present invention is applied, the flat fitting convex portion 21 of the other end side main girder plate 32 is also securely fitted into the flat fitting receiving portion 22 of the one end side main girder plate 31.

In the segment 1 to which the present invention is applied, the segment shaped steel 2 having a predetermined cross-sectional shape is used for each main girder plate 3, and the fitting convex portion 21 and the fitting convex portion 21 formed in a curved shape or the like in a shape corresponding to each other and the fitting The receiving portion 22 is formed on each of the pair of main girder plates 3 and fits securely and firmly. In the segment 1 to which the present invention is applied, in particular, the fitting convex portions 21 and the fitting receiving portions 22 of the pair of main girder plates 3 are formed in a shape corresponding to each other at substantially the same positions in the normal direction Z. By doing so, it is possible to improve the integrity of the plurality of segments 1 connected in the axial direction X.

Further, in the segment 1 to which the present invention is applied, the fitting convex portions 21 and the fitting receiving portions 22 of the pair of main girder plates 3 are formed in a shape corresponding to each other at substantially the same positions in the normal direction Z. By being assembled and securely fitted, it becomes possible to easily carry out on-site assembly of a plurality of segments 1. Further, in the segment 1 to which the present invention is applied, the ease of assembling the plurality of segments 1 in the field is improved, so that the integrity of the plurality of segments 1 is surely improved and the plurality of segments 1 connected to each other are surely improved. It is also possible to realize high durability during an earthquake.

As shown in FIG. 37, the segment 1 to which the present invention is applied is fitted to the filled concrete 60 by using the segment shaped steel 2 shown in FIGS. 6 and 7 for each main girder plate 3. One or both of the convex portion 21 and the fitting receiving portion 22 is also formed on the side surface of the main body portion 20 arranged on the inner side 6a side of the steel shell 6. As a result, in the segment 1 to which the present invention is applied, the fitting convex portion 21 or the fitting receiving portion 22 is locked to the filling concrete 60 on the inner side 6a side of the steel shell 6, so that the inner 6a of the steel shell 6 is engaged. It is possible to improve the integrity of the filling concrete 60 and the steel shell 6 to be filled in.

In the segment 1 to which the present invention is applied, the fitting convex portion 21 and the fitting receiving portion 22 are formed on only one of the side surfaces of the main girder plate 3 arranged on the opposite side of the inside 6a of the steel shell 6. Not only is it formed, but it is also formed on either side surface of the steel shell 6 arranged on the inner 6a side. As a result, in the segment 1 to which the present invention is applied, the fitting convex portion 21 and the fitting receiving portion 22 are locked to the filling concrete 60 also on the inner side 6a side of the steel shell 6, so that the inner 6a of the steel shell 6 is engaged. It is possible to improve the integrity of the filling concrete 60 and the steel shell 6 to be filled in.

Further, in the segment 1 to which the present invention is applied, the fitting convex portion 21 and the fitting receiving portion 22 are locked to the filling concrete 60 also on the inner 6a side of the steel shell 6, so that the steel shell 6 and the filling concrete are locked. The 60 is integrated with respect to the normal direction Z, and the deflection of the steel shell 6 in the normal direction Z and the deflection of the filled concrete 60 with respect to the external force of the tunnel are in substantially the same state, ensuring the behavior of the so-called lap structure. be able to. As a result, in the segment 1 to which the present invention is applied, the fitting convex portion 21, the fitting receiving portion 22, and the filling concrete 60 are continuously formed in the circumferential direction Y to prevent slippage. The rigidity of the concrete becomes extremely high, and the effect of integration becomes remarkably enhanced. Further, the segment 1 to which the present invention is applied has an effect of suppressing the filling concrete 60 from falling into the inside of the tunnel even when an external force of the tunnel is applied, which greatly contributes to the safety of the tunnel structure. It becomes.

Further, in the segment 1 to which the present invention is applied, as shown in FIG. 4, the segment shaped steels 2 asymmetrically formed in the axial direction X are common to each of the pair of main girder plates 3 as having substantially the same shape. Can be used. As a result, in the segment 1 to which the present invention is applied, the segment shaped steel 2 having substantially the same shape is used as each main girder plate 3, so that the segment shaped steel 2 serving as the main girder plate 3 can be shared and the segment can be shared. It is possible to reduce the production cost of 1.

In the segment 1 to which the present invention is applied, in particular, as shown in FIG. 38, the other end side main girder plate 32 of the other segment 1 connected adjacently in the axial direction X is the one end side main of the predetermined segment 1. A water stop groove 23 having a concave shape in the axial direction X is formed in a state of being in contact with the girder plate 31.

In the water stop groove 23, in a state where the main girder plate 31 on one end side and the main girder plate 32 on the other end side are in contact with each other in the axial direction X, the fitting convex portion 21 or the fitting receiving portion 22 is in the normal direction Z. Is formed in a concave shape so as to be curved in a substantially S-shaped cross section from the outer side A to the inner side B in the axial direction X.

As shown in FIG. 38A, the water stop groove 23 is formed so as to be curved in a substantially S-shaped cross section, so that the widening portion 23a has a relatively large gap and the narrowing portion has a relatively small gap. A portion 23b is formed. In the water stop groove 23, a sealing material 24 made of rubber or the like is fitted to the widening portion 23a in a state before the groundwater pressure acts from the ground side Z1.

As shown in FIG. 38 (b), the water stop groove 23 is sealed by the water pressure of the groundwater or the like in an attempt to allow groundwater or the like to infiltrate from the ground side Z1 to the inner air side Z2 by the action of the groundwater pressure from the ground side Z1. The material 24 is pressed P. At this time, the sealing material 24 is deformed so as to protrude from the widened portion 23a to the narrow portion 23b, and is sandwiched so as to be in close contact with the narrow portion 23b having a relatively small gap.

Segment 1 to which the present invention is applied is compared in a state after the main girder plate 31 on the one end side and the main girder plate 32 on the other end side are in contact with each other in the axial direction X and groundwater pressure is applied from the ground side Z1. The sealing material 24 is closely attached to the narrow portion 23b of the small gap. As a result, in the segment 1 to which the present invention is applied, the infiltration of groundwater and the like is surely blocked by the sealing material 24 which is in close contact with the segment 1, so that the water stopping performance at the connecting portion of the plurality of segments 1 can be significantly improved. Become.

Further, the segment 1 to which the present invention is applied is independent because a water stop groove 23 having a concave shape in the axial direction X is formed continuously from the fitting convex portion 21 or the fitting receiving portion 22 in the normal direction Z. It is not necessary to provide the water-stopping structure in the segment 1. As a result, the segment 1 to which the present invention is applied does not require an independent water blocking structure, so that the manufacturing cost of the segment 1 for providing the water blocking structure can be suppressed.

Further, in the segment 1 to which the present invention is applied, as shown in FIG. 39, the water stop groove 23 is formed independently of the fitting convex portion 21 or the fitting receiving portion 22, and is adjacent to the axial direction X. When the water stop groove 23 of the other segment 1 and the water stop groove 23 of the other segment 1 are formed at substantially the same position in the normal direction Z, the width of the sealing material 24 can be freely selected, and further, the axial direction can be selected. By overlapping the two sealing materials 24 adjacent to X and resisting the groundwater pressure, it is possible to exhibit high water stopping performance. At this time, in the segment 1 to which the present invention is applied, the water blocking grooves 23 having a concave shape are formed on both side surfaces of the main body portion 20 in the axial direction X, and the water stopping grooves 23 having a concave shape on the outer side A of the main body portion 20 , The water stop groove 23 having a concave shape on the inner side B of the main body portion 20 may be formed at substantially the same position as each other in the normal direction Z. By providing the water blocking grooves 23 on both sides of the segment 1 to which the present invention is applied, not only the integrity of the water blocking groove 23 on the inner side B with the filled concrete 60 is dramatically improved, but also the main girder. The shape of the plate 3 becomes symmetrical, and the manufacturing efficiency is dramatically improved. At the same time, it is possible to use the function of preventing slippage instead of the function of stopping water.

As shown in FIGS. 3 to 7, in the segment 1 to which the present invention is applied, a segment shaped steel 2 having a predetermined cross-sectional shape is used for each main girder plate 3, and a fitting convex portion 21 and a fitting receiving portion are used. By forming 22, the rigidity of each main girder plate 3 in the out-of-plane direction and the in-plane direction is improved. As a result, the segment 1 to which the present invention is applied can improve the rigidity of each main girder plate 3 in the out-of-plane direction and the in-plane direction, and can increase the proof stress of each main girder plate 3. ..

As shown in FIG. 2, the segment 1 to which the present invention is applied is formed by, as needed, a segment shaped steel 2 formed in a predetermined cross-sectional shape, like each main girder plate 3, and each joint plate 4 May be used as. By using the segmented steel 2 shown in FIGS. 6 and 7, each of the joint plates 4 has a fitting convex portion 21 of the one-sided joint plate 41 arranged on one end side in the circumferential direction Y and the circumferential direction Y. The fitting receiving portion 22 of the other end side joint plate 42 arranged on the other end side is formed continuously in the axial direction X at substantially the same position in the normal direction Z.

As a result, in the segment 1 to which the present invention is applied, the fitting convex portions 21 and the fitting receiving portions 22 of the pair of joint plates 4 are formed in a shape corresponding to each other at substantially the same positions in the normal direction Z. By doing so, it is possible to improve the integrity of the plurality of segments 1 connected in the circumferential direction Y. As the segment 1 to which the present invention is applied, for example, the segment shaped steel 2 formed in a predetermined cross-sectional shape may be used only in either the main girder plate 3 or the joint plate 4.

As shown in FIG. 1, the segment 1 to which the present invention is applied uses segment shaped steel 2 formed in a predetermined cross-sectional shape, particularly in both the pair of main girder plates 3 and the pair of joint plates 4. In addition, a plurality of segments 1 are integrally connected in the axial direction X and the circumferential direction Y. At this time, in the segment 1 to which the present invention is applied, a plurality of segments 1 are integrally connected in the circumferential direction Y to construct a segment ring 70, and a plurality of segment rings 70 are integrally connected in the axial direction X. The tunnel 7 is constructed.

As shown in FIGS. 18 to 34, the segment 1 to which the present invention is applied is provided with a reinforcing member 62 such as a vertical rib 65 inside the steel shell 6 6a. Then, when both ends of the reinforcing member 62 in the axial direction X are fixed to the pair of main girder plates 3 by welding or the like, as shown in FIG. 40 (a), the center of each main girder plate 3 in the circumferential direction Y. The side is large and easy to bend.

Further, since a plurality of segments 1 are generally arranged in a substantially staggered pattern, the position of the joint plate 4 of the other segment 1 adjacent to the axial direction X is the axis as shown in FIG. 40 (b). It is approximately the center of the circumferential direction Y of the main girder plate 3 of one of the segments 1 adjacent to the direction X. At this time, since the substantially center of the circumferential direction Y of the main girder plate 3 of one segment 1 becomes the position of the joint plate 4 of the other segment 1 and becomes a structural weak point, the circumferential direction Y of each main girder plate 3 It is necessary to reinforce the central side.

As described above, although the central side of each main girder plate 3 in the circumferential direction Y becomes large and easily bent, the segment 1 to which the present invention is applied has a plurality of slip prevention members 61 or reinforcements as shown in FIGS. 21 and 27. The member 62 is provided, and the separation distance d1 on the central side in the circumferential direction Y is smaller than the separation distances d2 and d3 on both end sides, so that the displacement prevention member is on the central side of the main girder plate 3 in the circumferential direction Y. The 61 or the reinforcing member 62 is densely provided. At this time, in the segment 1 to which the present invention is applied, the slip prevention member 61 or the reinforcing member 62 is densely provided on the central side of the main girder plate 3 in the circumferential direction Y, so that the circumferential direction Y of each main girder plate 3 is provided. The central side of the tunnel is reinforced and its deflection is prevented to improve the dimensional accuracy of the axial direction X of the segment 1 to obtain a high-quality segment 1, and the entire tunnel in which a plurality of segments 1 are arranged in a substantially staggered pattern. Can be increased in strength.

Here, as shown in FIG. 2, the segment 1 generally needs to perform various processes such as cutting, cutting, bending, and welding of steel plates, shaped steels, etc. in the assembly process of a plurality of members. is there. Then, as a product after processing, segment 1 needs to have dimensional accuracy such as width, height, twist, and bending within an allowable range, but the strength and composition of each member are different. Control of accuracy was largely based on experience, which was extremely difficult.

In particular, the main girder plate 3 of the segment 1 is a main member when resisting an external load such as soil water pressure, and is arranged on the outer periphery of the steel shell 6 of the segment 1, so that the quality and dimensional accuracy are high. Is required. Therefore, as shown in FIGS. 6 and 7, the segment 1 to which the present invention is applied has a deviation amount Δ between the center of gravity position and the center of gravity position of 8 with respect to the total height H or the total width W of the segment shaped steel 2. It is assumed that the position of the center of gravity and the position of the center of gravity are substantially the same as% or less.

Here, if the amount of deviation Δ in the axial direction X (normal direction Z) between the centroid position and the center of gravity position of the main girder plate 3 is large, the deformation such as warpage and twist due to bending and welding becomes large. It becomes difficult to secure the required dimensional accuracy of the segment 1. On the other hand, if the total width W (total height H) of the main girder plate 3 in the axial direction X (normal direction Z) is large, the rigidity of the main girder plate 3 increases, and deformation such as warpage and twist due to bending and welding is performed. The resistance to the segment 1 is increased, and it becomes easy to secure the required dimensional accuracy of the segment 1.

If the deviation amount Δ between the centroid position and the center of gravity position with respect to the total height H or the total width W is adopted as an index indicating the manufacturing difficulty, the larger the deviation amount Δ, the larger the warp and the torsional deformation, and the higher the manufacturing difficulty. As shown in FIG. 41, the inventor of the present invention can secure a high level of quality and dimensional accuracy by simple correction if the deviation amount Δ is 8% or less based on various manufacturing results so far. It was found that it is possible, and if the deviation amount Δ is 3% or less, it is possible to secure a higher level of quality and dimensional accuracy without the need for correction. If the deviation amount Δ exceeds 8%, it becomes extremely difficult to secure the required dimensional accuracy by normal straightening, and processing with a large-scale jig is required, which greatly increases the assembly processing cost. become.

As a result, in the segment 1 to which the present invention is applied, the centroid position and the center of gravity position substantially coincide with each other in the cross-sectional direction of the segment shaped steel 2, so that the assembly processing of the segment shaped steel 2 is only significantly reduced. It is possible to secure a high level of quality and dimensional accuracy. Then, the segment 1 to which the present invention is applied can secure a higher level of quality and dimensional accuracy, especially when the deviation amount Δ between the centroid position and the center of gravity position of the segment shaped steel 2 is 3% or less. It will be possible.

The basic idea of segment 1 to which the present invention is applied is to set a relatively large slip-prevention rigidity in the normal direction Z to avoid extreme risks such as tunnel collapse. It is an object of the present invention to provide a tunnel segment structure that appropriately resists an external force acting on a tunnel by appropriately providing a displacement preventing member 61 or the like in the tunnel tangential direction shown in 34. Further, in addition to this basic idea, by forming the fitting convex portion 21 and the fitting receiving portion 22 continuous in the circumferential direction Y on the main girder plate 3, not only the fitting function and the water stopping function but also the slip prevention It is possible to achieve the function imparting at the same time. Moreover, by devising the arrangement of the uneven shape of the main girder plate 3 in order to manufacture it at low cost, it is possible to achieve both low cost and multi-functionality.

Although the examples of the embodiments of the present invention have been described in detail above, the above-described embodiments are merely examples of the embodiment of the present invention, and the technical aspects of the present invention are based on these. The scope should not be construed in a limited way.

1: Segment 2: Segment shaped steel 2a: Curved surface 2b: Flat surface 20: Main body 20a: One side surface 20b: Other side surface 21: Fitting convex portion 22: Fitting receiving portion 23: Water stop groove 23a: Widening portion 23b : Narrow portion 24: Sealing material 25: Flange 26: Web 3: Main girder plate 31: One end side main girder plate 32: Other end side main girder plate 4: Joint plate 41: One end side joint plate 42: Other end side joint plate 5: Skin plate 6: Steel shell 6a: Internal 60: Filled concrete 61: Anti-slip member 61a: Part 61b: Remaining part 62: Reinforcing member 62a: Notch 63: Main steel material 64: Strength distribution bar 65: Vertical rib 65a : Ground side vertical rib 65b: Inner air side vertical rib 66: Reinforcing material 7: Tunnel 70: Segment ring 81: L-shaped gibber 82: Deformed U-shaped gibber 83: Composite deformed gibber 84: S-shaped gibber A: Outside B: Inside X: Axial direction Y: Circumferential direction Z: Normal direction

Claims (10)

A segment in which a tunnel is constructed by connecting multiple units.
A pair of main girder plates arranged at both ends in the axial direction of the tunnel and a pair of joint plates arranged at both ends in the circumferential direction of the tunnel, and a pair of steel shells filled with filled concrete inside. It is formed by being surrounded by the main girder plate and the pair of the joint plates.
The pair of main girder plates includes one end side main girder plate to be the main girder plate arranged on one end side in the axial direction of the tunnel and the main girder plate arranged on the other end side in the axial direction of the tunnel. A main body portion extending in the normal direction of the tunnel is formed on the other end side main girder plate, and a fitting convex portion protruding from the main body portion in the axial direction of the tunnel is formed on the one end side main girder plate. A fitting receiving portion that sinks from the main body portion in the axial direction of the tunnel is formed on the other end side main girder plate, and the fitting convex portion and the other end side main girder formed on the one end side main girder plate. The fitting receiving portion formed on the girder plate is continuously formed in the circumferential direction of the tunnel at substantially the same position in the normal direction of the tunnel.
In each of the main girder plates, either one or both of the fitting convex portion and the fitting receiving portion locked to the filled concrete are also formed on the inner side of the steel shell in the axial direction of the tunnel. Being done
A segment characterized in that, inside the steel shell, a slip stopper member fixed to one of the pair of main girder plates or a reinforcing member erected on both of the pair of main girder plates is provided. The slip prevention member is a reinforcing material fixed to the main girder plate and a skin plate provided on either one or both of the ground side and the inner air side in the normal direction of the tunnel, or fixed to the skin plate. The segment according to claim 1, wherein unreinforced steel bars, steel plates, shaped steels, headed studs or U-shaped girders are used. As the slip prevention member, an L-shaped gibber bent into a substantially L-shape is used, one side of the L-shaped gibber is fixed to the main girder plate, and the rest of the L-shaped gibber is fixed. The segment according to claim 1, wherein a force distribution bar extending in the axial direction of the tunnel is connected to the other side. As the slip prevention member, a deformed U-shaped gibber bent in a substantially U-shape is used, and a part of the deformed U-shaped gibber is either on the ground side or the inner air side in the normal direction of the tunnel. The first aspect of the invention, wherein the skin plates provided on both of the skin plates and the main girder plate are fixed to each other, and a force distribution bar extending in the axial direction of the tunnel is connected to the rest of the deformed U-shaped gibber. Segment. The slip prevention members are provided as a pair by being fixed to each of the one end side main girder plate and the other end side main girder plate, and both ends of the force distribution bars extending in the axial direction of the tunnel are paired. The segment according to any one of claims 2 to 4 , wherein the segment is connected to the slip stopper member of the above. The segment according to claim 1, wherein the reinforcing member is made of a reinforcing bar, a steel plate, or a shaped steel in which both ends in the axial direction of the tunnel are fixed to the pair of main girder plates. As the reinforcing member, substantially flat plate-shaped vertical ribs in which both ends in the axial direction of the tunnel are fixed to the pair of main girder plates are used, and the vertical ribs are located on the central side of the tunnel in the axial direction rather than both ends. The segment according to claim 1, wherein a notch portion is formed in which the lower end portion of the tunnel is arranged on the ground side in the normal direction of the tunnel. The longitudinal ribs, according to claim 7, wherein the notch is while being formed to extend substantially linearly in the axial direction of the tunnel, characterized in that it is formed to be inclined in a substantially tapered shape to both end portions of the notch Described segment. The vertical rib is provided with a ground-side vertical rib on the ground side in the normal direction of the tunnel and an inner air-side vertical rib on the inner air side in the normal direction of the tunnel. The segment according to claim 7 or 8 , wherein the vertical ribs on the inner air side are arranged apart from each other in the normal direction of the tunnel. The segment according to any one of claims 7 to 9 , wherein the vertical rib is cut out at a corner portion on the ground side in the normal direction of the tunnel.

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