JP2008002155A - Rolling correcting structure of segment ring, and segment ring for correcting rolling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily correct the rolling of a segment ring. <P>SOLUTION: A rectangular segment ring 11 for correcting the rolling is joined to a rectangular rolled segment ring 1A, and a normal rectangular segment ring is joined. In the segment ring 11, an inter-ring joint 13 which is provided on a surface 7a to be joined to the rolled segment ring 1A is located in a position to be shifted by a rolling angle θ with respect to an inter-ring joint 3 which is provided on a jointing surface 7b facing the surface 7a. Thus, when the segment ring 1A causes the rolling, the segment ring 11 is joined to the segment ring 1A, so that the rolling of a rectangular segment to be succeedingly joined can be eliminated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a segment ring correction structure when rolling occurs when laying a segment ring that constitutes a lining part of an underpass tunnel that three-dimensionally intersects with a track, a road, and the like, and a rolling correction segment ring used therefor.

An underpass tunnel that intersects with a track, road, etc. is composed of a tunnel part and an approach part that connects the tunnel part and the ground. (For example, refer to Patent Document 1).
According to the shield construction method, an underpass tunnel can be constructed without excavating tracks and roads, so that the construction period and construction cost can be reduced, and the traffic network is not blocked.
JP 2005-248546 A

By the way, in the underpass tunnel, a phenomenon called rolling in which the segment ring constituting the lining portion rotates (inclines) around the tunnel axis may occur due to construction errors or geometric factors.
For example, geometrical factors that cause rolling will be described with reference to FIG. FIG. 8 shows an inclined part including an approach part of an underpass tunnel having a rectangular cross section, where (a) is a plan view and (b) is a longitudinal sectional view. In this example, the inclined portion is configured to curve in the left-right direction while being inclined downward or upward.
Thus, when the tunnel curves in the middle, rectangular taper segment rings T having different lengths on both sides are inserted between the curve portions, that is, between the rectangular segment ring S0 and the rectangular segment ring S1. However, since the lengths of both sides of the rectangular taper segment ring T are different, the lower corners P and Q at the joint surface with the rectangular segment ring S1 to be joined next have the length from the rectangular segment ring S0. Due to the difference, the height difference H is generated.

Therefore, unless the new rectangular segment ring S1 to be joined to the joint surface of the rectangular taper segment ring T is rolled (inclined), the joints between the two rings cannot be fitted to each other, and the rectangular segment ring S1 becomes the rectangular taper segment ring T. It becomes impossible to join. In the case of a rectangular segment ring, the subsequent segment rings S1,... Are also inclined by rolling, so that when rolling exceeding the building limit occurs on the inner peripheral surface of the tunnel, there is a drawback that hinders the operation of the vehicle or the like.
In the case of a circular segment ring, even if the segment rings to be sequentially joined roll in the middle, there is no deviation between the segment rings. However, because the segment ring rolls, the position of the K-shaped segment (the wedge-shaped segment that is inserted last when assembling the segment ring) is shifted, and accessories such as cables and lighting installed on the inner peripheral surface of the tunnel This causes a problem that the accessory jig must be re-attached to the inner surface of the segment.
Rolling also occurs due to construction factors caused by stacking errors of the joints between the rings in the segment ring, assembly errors of the segment pieces, and angle errors during the construction of the segment ring, and the same problems as described above occur.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a segment ring correction structure capable of easily correcting the segment ring rolling and a rolling correction segment ring used therefor. .

In order to achieve the above object, the segment ring correcting structure according to the present invention is configured such that when a segment ring is rolled when the segment ring constituting the lining portion of the underpass tunnel is laid, the segment ring is rolled on the one segment ring. A segment ring modification structure in which another segment ring is joined via a modification segment ring,
The position of the inter-ring joint provided on the joint surface of the rolling correction segment ring that joins one rolled segment ring is between the rings provided on the joint surface with other segment rings according to the rolling amount of one segment ring. It is set to the position shifted from the position of the joint.
In the present invention, the rolling means that the segment ring to be joined next rotates or tilts at a certain angle around the tunnel axis with respect to the segment ring installed based on the design standard.
In the present invention, when the next segment ring is joined to one segment ring that has been joined and installed in a state where rolling has occurred on the joining surface, rolling is performed on the inter-ring joint on the joining surface of the segment ring that does not cause rolling. The joint surface of the rolling correction segment ring whose position of the inter-ring joint is shifted in accordance with the amount is joined, and then the other joint surface of the rolling correction segment ring is arranged with the rolling modified ring joint. Therefore, it is possible to join another segment ring joined to this rolling correction segment ring in a state where the rolling is corrected.
Note that the rolling correction segment ring does not need to be corrected with a single segment ring. By connecting multiple rolling correction segment rings in sequence, each joint surface can be corrected in stages. The position of the inter-ring joint at may be gradually shifted.

In addition, one segment ring in which rolling occurs may be provided in an inclined portion of the underpass tunnel, and the rolling generated due to a geometric factor can be corrected when the segment ring is curved while being inclined at the inclined portion.
At that time, each segment ring may be either a rectangular segment ring or an annular segment ring. In the case of a rectangular segment ring, there is a possibility of exceeding the building limit on the inner peripheral surface of the tunnel due to rolling. Can be corrected so as not to cause problems. Even if rolling occurs in the annular segment ring, the cross-sectional area of the inner space of the tunnel is not changed, but the position of the mounting jig for accessories such as cables and lighting installed inside the tunnel and the wedge shape (K type) Segment misalignment can be restored by rolling correction.
According to the rolling correction structure of a segment ring according to the present invention, when rolling occurs in one segment ring when the segment ring constituting the lining portion of the underpass tunnel is laid, a rolling correction U-shaped segment is added to the one segment ring. The structure of the segment ring for joining another U-shaped segment via a joint, and the position of the inter-ring joint provided on the joint surface of the rolling-correcting U-shaped segment for joining to one rolled segment ring is According to the rolling amount of the ring, it is set to a position shifted from the position of the inter-ring joint provided on the joint surface with the other U-shaped segment.
Rolling correction is performed by a rolling correction U-shaped segment provided in the approach section.

The rolling correcting segment ring according to the present invention is formed by connecting a plurality of segment pieces via an inter-segment joint and joining two opposing joint surfaces to another adjacent segment ring via an inter-ring joint. In the segment ring for rolling correction, the position of the joint between the rings provided on one joint surface depends on the amount of rolling of the one segment ring that has caused the rolling. It is deviated from the position.
One joint surface having an inter-ring joint in which the position of the inter-ring joint is shifted in accordance with the amount of rolling is joined to one segment ring that has caused rolling, and rolling has occurred on the other opposing joint surface. Since the inter-ring joint is provided at a position that is not present, another segment ring can be joined with the rolling corrected state.

A rolling correction segment ring according to the present invention is a rolling correction segment ring used to eliminate rolling that has occurred during the laying of the segment ring that constitutes the lining part of the underpass tunnel, and is provided on one joint surface. Further, the position of the joint between the rings is shifted from the position of the joint between the rings provided on the other facing joint surface.
The rolling of the segment ring can be eliminated by joining the segment ring for rolling correction to the rolled segment ring.

  The rolling correction structure for a segment ring and the segment ring for rolling correction according to the present invention are for rolling correction even if rolling occurs due to geometrical or construction factors when the tunnel is constructed by sequentially joining the segment rings. Segment ring or rolling correction U-shaped segments can be joined to improve segment ring rolling, preventing the building limits from being exceeded by rolling, and attaching accessories such as cables and lighting on the inner surface of the tunnel This eliminates the complexity of re-installing the jig.

A segment ring rolling correction structure and a rolling correction segment ring according to a first embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the underpass tunnel 2 that three-dimensionally intersects with a track, a road, or the like is an approach in which a tunnel portion 2B constructed in a state where it is buried in the ground and an upper portion connecting the ground GL and the tunnel portion 2B are opened. The end portion of the tunnel portion 2B that follows the approach portion 2A and the approach portion 2A is an inclined portion 2C. That is, an inclined portion 2C that gradually increases in depth from the ground GL toward the ground is formed, the tunnel portion 2B becomes substantially horizontal at a predetermined depth, and an upward slope toward the ground at a predetermined point. Part 2C is formed.
In the construction of the underpass tunnel 2, various known methods can be adopted, but in this embodiment, a rectangular cross-section shield excavator (not shown) is used from the viewpoint of effective use of the cross section and reduction of work period and construction cost. The segments are assembled behind this rectangular section shield excavator.

As shown in FIG. 2, the segment ring constituting the lining portion of the tunnel portion 2B is a rectangular segment ring 1, and is composed of a plurality of segment pieces 4 and 5 arranged in the circumferential direction of the tunnel. Each segment piece 4 may be a steel segment, a reinforced concrete segment, or a concrete-filled steel segment.
The rectangular segment ring 1 is formed in a substantially quadrangular frame shape in the basic configuration shown in FIG. 2, and substantially L-shaped segment pieces 4 are arranged at the corners of the four corners, and each L-shaped segment constituting each side of the rectangle. A block-like, for example, rectangular parallelepiped segment piece 5 is joined between the pieces 4 and 4 by an inter-segment joint. In particular, a wedge block-shaped segment piece 5a (5) having a substantially trapezoidal shape in plan view is disposed between the L-shaped segment pieces 4 and 4 on both sides on the upper side, and one set is formed by inserting this segment piece 5a last. A rectangular segment ring 1 is constructed.
A plurality of inter-ring joints 3 are provided at predetermined intervals on a pair of joining surfaces 6 a and 6 b which are opposing end surfaces of the rectangular segment ring 1. As the inter-ring joint 3, a push-grip joint or a cone connector that is easy to construct is used.
Push-grip joints are pin-type joints that apply wedges. Insertion-side pin bolts are inserted into holes on the receiving side to obtain a fastening force. Each pin bolt and receiving hole can be engaged with each other. A serrated protrusion and a recess are continuously formed. The cone connector is configured to obtain a fastening force by engaging a truncated cone-shaped male joint having a large number of slits provided with claws at the tip by inserting the male joint into a female joint for storing the claws.

  When rolling occurs in the rectangular segment ring 1 due to construction errors or geometrical factors, the rectangular segment ring 1 has a tunnel axis C as a central axis and a vertical reference line L as shown in FIG. It rotates by a certain angle θ (for example, minute angle θ = 3 °) and tilts. Note that the angle θ is referred to as a rolling angle θ. Accordingly, the position of each inter-ring joint 3 also changes by the rolling angle θ, so that the rolled rectangular segment ring 1 is denoted by reference numeral 1A, and the shifted inter-ring joint 3 is denoted by reference numeral 3A. Conventionally, in order to join other rectangular segment rings 1 adjacent to the rolled rectangular segment 1A, the next rectangular segment 1 is rolled by the same angle θ to the rolled rectangular segment ring 1A. Need to do.

Therefore, in this embodiment, in order to eliminate the rolling of the segment ring, the rolling correction segment ring 11 is interposed and joined together. In FIG. 4, the rolling correcting segment ring 11 is joined to the rolled rectangular segment ring 1A. In the drawing, the rolling correction segment ring 11 is indicated by a solid line, and the rolled rectangular segment ring 1A is indicated by a two-dot chain line.
The rolling correction segment ring 11 has the same size and shape as the normal rectangular segment ring 1 described above, but the position of the inter-ring joint 13 provided for joining to the rolled rectangular segment ring 1A is the normal rectangular segment ring 1. Is different. In a state where the rolling correction segment 11 is aligned with the central axis C and is installed at a rolling angle θ = 0 ° around the reference line L, specifically, the inter-ring joint 13 is an inter-ring joint in the rectangular segment ring 1. 3 is provided at a position shifted from the original position of 3 (indicated by a two-dot chain line) by the rolling angle θ.
In the case of a geometric factor, the rolling angle θ can be calculated in advance from the geometric shapes of the segment rings 1, 1A, 11 and the inclined portion 2C of the tunnel, and if the rolling angle θ is known, the ring from the tunnel axis C can be calculated. The rolling displacement R can be obtained from the distance to the inter-joint 3 and the rolling angle θ. Therefore, the inter-ring joint 13 may be provided in advance at a position shifted by the rolling displacement R from the original position (indicated by a two-dot chain line) of the inter-ring joint 3 at the manufacturing stage of the segments 4 and 5. Moreover, in the case of a steel segment, the position of the inter-ring joint 13 may be determined and determined on site.
The position of the inter-ring joint 3 provided on the other joint surface 7b of the rolling correction segment ring 11 is the same as that of the normal rectangular segment ring 1 shown in FIG.

The rolling correction segment ring 11 according to the present embodiment has the above-described configuration. Next, a segment ring rolling correction method in the tunnel portion will be described with reference to FIGS. 4 and 5.
For example, a case where rolling occurs due to a geometric factor in the inclined portion 2C of the underpass tunnel 2 will be described as an example. 5A and 5B show a plan view and a longitudinal sectional view of an inclined portion 2C of an underpass tunnel 2 formed of a segment ring 1 having a rectangular section. In this example, the inclined portion is configured to curve right or left while being inclined downward or upward.
In the inclined portion 2C, the rectangular segment rings 1 are sequentially joined by the inter-ring joint 3, and the rectangular taper segment rings T having different lengths on both sides are joined at a portion where the tunnel curves in the middle. In this case, since the lengths of the both sides of the rectangular taper segment ring T are different as described above, the lower corners P and Q of the joint surface with the rectangular segment ring 1A to be joined next are the rectangular segment ring 1 The height difference H is generated due to the difference in length.

Therefore, the rectangular segment ring 1A to be joined to the joint surface of the rectangular taper segment ring T with the inter-ring joint 3 is rolled against the rectangular segment ring 1 joined before the rectangular taper segment ring T as shown in FIG. Joining is performed in a state inclined by an angle θ. When the rolling correction segment ring 11 is joined to the rectangular segment ring 1A in the rolling state, as shown in FIG. 4, the rolling correction segment ring 11 has a central axis C such that the rolling angle θ = 0 °. When the joint surface 7a is joined to the rectangular segment ring 1A by adjusting the position around the circumference, the inter-ring joint 13 shifted in the rolling correction segment ring 11 is shifted in the rectangular segment ring 1A in the state where the angle θ is rolled. Since there is no inter-ring joint 3A, male and female are fitted.
This makes it possible to correct the rolling of the tunnel that occurs when the rectangular taper segment ring T is connected. And since the joint 3 between rings in the joint surface 7b facing the joint surface 7a of the segment ring 11 for rolling correction is provided in the same position as the normal rectangular segment ring 1, the following rectangular segment ring 1 is connected. Thereafter, the rectangular segment ring 1 can be sequentially joined with the rolling corrected.

In the above description, after the rectangular segment ring 1A is joined in a rolling state following the rectangular taper segment ring T that generates rolling, the rolling correction segment ring 11 is joined, but the rectangular segment ring 1A is omitted. The rolling correcting segment ring 11 may be directly joined to the joining surface 6a of the rectangular taper segment ring T.
Even when rolling occurs due to construction factors such as construction errors, the rolling can be corrected by interposing and joining the rolling correction segment ring 11 in the same manner. In this case, since the rolling angle θ cannot always be calculated in advance, the inter-ring joint 13 formed on one joint surface 7a of the rolling correction segment ring 11 may be formed at the tunnel construction site.

  As described above, according to the rolling correction structure of the segment ring and the rolling correction segment 11 according to the present embodiment, even if rolling occurs due to geometrical or construction factors when the tunnel portion is constructed, it is used for rolling correction. By joining with the segment ring 11 interposed, the rolling of the segment rings T and 1A can be improved, and the rolling can prevent the spatial range of the inner peripheral surface of the tunnel from exceeding the building limit.

FIG. 6 is a front view showing a rolling correction segment ring according to the second embodiment of the present invention.
The second embodiment shown in FIG. 6 shows a rolling correction segment ring 21 for an annular segment ring. In the case of the annular rolling correction segment ring 21, each inter-ring joint 25 is provided at a position shifted from the original position of the inter-ring joint 23 by the rolling displacement R determined from the rolling angle θ and the diameter of the annular segment ring. Just keep it. Therefore, the position of the inter-ring joint 25 provided on one joint surface 7a is shifted by the rolling angle θ (rolling amount) from the position of the inter-ring joint 23 provided on the other opposing joint surface 7b.
As for the annular segment ring, when the segment ring 21 for rolling correction is used, when the segment ring rolls, the position of the segment 24 of the wedge-shaped block is shifted, or the cable or illumination installed on the inner peripheral surface of the tunnel Therefore, the trouble of reattaching the attachment attachment jigs such as cables and lighting on the inner peripheral surface of the tunnel can be eliminated.

FIG. 7 is a front view showing a rolling correction segment according to a modification of the second embodiment. The rolling correction substantially U-shaped segment 27 according to this embodiment shows a rolling correction segment for an annular segment ring (not shown), and has a horseshoe-shaped cross section that opens upward. Also in the case of this rolling correction substantially U-shaped segment 27, the rolling displacement R determined by the rolling angle θ and the diameter of the annular segment ring between the two opposing joint surfaces 7a and 7b, the inter-ring joint 23 of one joint surface 7b. What is necessary is just to provide each ring joint 28 of the other joint surface 7a in the position shifted from the position (it shows with a dashed-dotted line).
If the substantially U-shaped segment 27 for rolling correction is used for the annular segment ring, the rolling can be corrected by the approach portion 2A when the segment ring rolls.

As described above, the rolling correction structure for the rectangular segment ring and the annular segment ring according to the embodiment of the present invention, and the rolling correction segment rings 11 and 21 and the rolling correction substantially U-shaped segment 25 used therefor have been described. The present invention is not limited to the embodiment, and can be appropriately changed without departing from the scope of the invention.
For example, in each of the above-described embodiments, the rolling is eliminated by one rolling correction segment ring 11, 21 and the rolling correction substantially U-shaped segment 27, but when the rolling is large, a plurality of rolling correction segments are used. The rolling angle may be reduced step by step using a ring or a substantially U-shaped segment to eliminate rolling comprehensively. For this purpose, the angular deviation of the inter-ring joints 3, 13, 23, 25, 23, 28 between the two opposing joint surfaces of the rolling correction segment rings 11, 21 and the rolling correction substantially U-shaped segment 27 is rolled. What is necessary is just to set to the appropriate angle sequentially which reduces angle (theta). In short, it is only necessary to obtain the desired function in the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The underpass tunnel based on embodiment of this invention is shown, (a) is a schematic whole figure, (b) is an expanded sectional side view of an inclination part. It is a front view of a rectangular segment ring. It is a front view of the rolled rectangular segment ring. It is a front view for demonstrating the state which joined the rectangular segment ring for rolling correction to the rolled rectangular segment ring. It is a figure which shows the joining structure of the segment ring of the state which corrected the rolling by the geometric factor in the inclination part of the underpass tunnel by a rectangular segment ring, (a) is a top view, (b) is a sectional side view. . It is a front view of an annular rolling correction segment ring. It is a front view of the substantially U-shaped segment for rolling correction which consists of a horseshoe-shaped cross section. It is a figure which shows the segment junction structure of the rolling generation | occurrence | production state by a geometric factor in the inclination part of the underpass tunnel by a rectangular segment ring, (a) is a top view, (b) is a sectional side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Rectangular segment ring 2 Underpass tunnel 2B Tunnel part 2C Inclined part 3, 13, 23, 25, 28 Joint between rings 4 Almost L-shaped segment piece 5 Block-shaped segment piece 11, 21 Rolling correction segment ring 27 Rolling correction U-shaped segment T Taper segment ring C Tunnel axis θ Rolling angle (rolling amount)
R Rolling displacement (rolling amount)

Claims (6)

When rolling occurs in one segment ring when laying the segment ring that constitutes the lining part of the underpass tunnel, the segment ring that joins the other segment ring to the one segment ring via the rolling correction segment ring A modified structure,
The position of the inter-ring joint provided on the joint surface of the rolling correction segment ring that joins the one segment ring that has been rolled is on the joint surface with the other segment ring according to the amount of rolling of the one segment ring. A rolling structure for a segment ring, wherein the structure is set at a position deviated from the position of the inter-ring joint provided.   2. The segment ring rolling correction structure according to claim 1, wherein the one segment ring in which rolling occurs is provided in an inclined portion of an underpass tunnel.   The segment ring modification structure according to claim 1, wherein each of the segment rings is a rectangular segment ring or an annular segment ring. A segment that joins another U-shaped segment to the one segment ring via a rolling correction U-shaped segment when rolling occurs in one segment ring when laying the segment ring that forms the lining part of the underpass tunnel A ring modification structure,
The position of the inter-ring joint provided on the joint surface of the rolling correcting U-shaped segment joined to the rolled one segment ring is joined to the other U-shaped segment according to the rolling amount of the one segment ring. A rolling structure for a segment ring, wherein the structure is set at a position shifted from a position of an inter-ring joint provided on a surface. In the segment ring for rolling correction, in which a plurality of segment pieces are connected via an inter-segment joint, and two opposing joint surfaces are joined to other segment rings via an inter-ring joint,
The position of the inter-ring joint provided on one joint surface deviates from the position of the inter-ring joint provided on the other facing joint surface in accordance with the amount of rolling of one segment ring that has caused rolling. Segment ring for rolling correction characterized by Rolling correction segment ring used to eliminate rolling that occurred when laying the segment ring that constitutes the lining part of the underpass tunnel,
A segment ring for rolling correction, wherein a position of an inter-ring joint provided on one joint surface is shifted from a position of an inter-ring joint provided on the other joint surface facing each other.

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