JP2018040246A - Connection structure and connection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a partition wall connection structure that is cost efficient and excellent in workability.SOLUTION: A connection structure 1 comprises: a fixing member 2, which is fixed to a segment; a fitting member 3, which is fixed to a precast member; a connector 4, which connects the fixing member 2 with the fitting member 3; an anchor 5, which fixes the fixing member 2 to the segment; and a fixture 6, which fixes the fitting member 3 to the precast member. An anchor insertion hole 23, which is a long hole for adjusting displacement in a tunnel axial direction, and a first connector insertion hole 24, which is a long hole for adjusting displacement in a height direction, are formed on the fixing member 2. A second connector insertion hole 37, which is a long hole for adjusting displacement in a tunnel width direction, and a fixture insertion hole 36, which is a long hole for adjusting displacement in the tunnel axial direction, are formed on the fitting member 3.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a joining structure and a joining method for fixing an upper portion of a partition wall.

In a road tunnel or the like, there are cases where an internal space is divided by providing a partition wall to form an evacuation passage or the like.
The partition wall is formed by juxtaposing a plurality of precast members in the tunnel longitudinal direction.

  The precast member that constitutes the partition wall is fixed by fixing the lower end to the floor slab via a jig, etc., and fixing the upper end to the tunnel inner wall (segment, secondary lining, etc.) via a joining member To do.

As the joining member 100, as shown in FIG. 6A, it is common to use a member in which a base plate 101 and a mounting plate 102 are integrally formed.
The base plate 101 is a part that is fixed to the inner wall of the tunnel via an anchor bolt 103. A bolt hole 104 for the anchor bolt 103 formed in the base plate 101 is a long hole for correcting a shift in the tunnel axis direction.

  On the other hand, the mounting plate 102 is a portion that is fixed to the precast member via a fixing bolt 105. A bolt hole 106 for the fixing bolt 105 formed in the mounting plate 102 is a long hole for correcting a shift in the tunnel width direction caused by unevenness of the inner wall surface of the tunnel.

However, the inner wall of the tunnel may not match the road alignment due to construction errors. In particular, since the shield tunnel is formed based on a limited pattern of taper segments, a deviation occurs between the tunnel vertical alignment and the road alignment. On the other hand, since the partition wall is formed along the road alignment, the shape of the joint portion between the inner wall surface of the tunnel and the partition wall is not constant.
Therefore, the conventional joining member may not be able to cope with changes in each joining portion.

  In Patent Document 1, as shown in FIG. 6 (b), as a joining member 200 that can cope with a change in the shape of the joint portion between the tunnel and the partition wall, a predetermined interval along the tunnel axis direction is provided. A column 201 that stands upright and holds the wall panel, a height adjustment member 202 that is slidable up and down at the upper end of the column 201, and a height adjustment that is fixed to the inner wall (ceiling) of the tunnel What is provided with the angle adjustment member 203 provided rotatably with respect to the member 202 is disclosed.

JP 2006-342567 A

The joining member 200 described in Patent Document 1 is uneconomical because the amount of steel material increases because a large number of support columns 201 need to be disposed along the tunnel axis direction. Moreover, since the metal support | pillar 201 is exposed to a wall surface, the joining member 200 of patent document 1 is weak to a fire etc., and in order to employ | adopt as a partition wall of an escape passage, it is necessary to perform a fireproof process separately.
Furthermore, there are many members 201, such as support | pillar 201, a wall panel, the height adjustment member 202, and the angle adjustment member 203, and construction of a partition wall will take time.

  The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to propose a joining structure and joining method for partition walls that are economical and excellent in workability.

  In order to solve the above-mentioned problems, the joining structure of the present invention is fixed to a fixed member fixed to a segment inner wall surface of a road tunnel constructed by a shield method and a precast tunnel cross-sectional inverted L-shaped wall member. A fixing structure for adjusting the mounting member to be adjusted in a three-dimensional direction, wherein the fixing member has a long anchor insertion hole formed in the tunnel axial direction, and a height direction and / or a tunnel radial direction. A first connecting insertion hole having a long hole formed in the mounting member, and a second connecting insertion hole having a long hole formed in the mounting member in a height direction and / or a tunnel radial direction. A fixing tool insertion hole having a long hole formed in the tunnel axial direction, and an anchor fixed to the bolt hole of the segment is inserted into the anchor insertion hole, and the first connection insertion Through-hole and said first A connecting tool that penetrates and connects with the connecting insertion hole is inserted, and a fixing tool that is fixed to a bolt hole in the inverted L-shaped upper end of the wall member is inserted into the fixing tool insertion hole, The shift in the height direction and the tunnel width direction is corrected by the one connection insertion hole and the second connection insertion hole.

If such a joint structure is used, the lower end of the precast member can be fixed with a predetermined jig, and the partition wall can be formed only by fixing the upper end to the inner wall surface of the tunnel via the joint structure. Excellent in properties.
In addition, since the fixing member and the mounting member are connected so that adjustment in the tunnel width direction and height direction is possible, even if there is a deviation between the road alignment and the shape of the inner wall surface of the tunnel, the deviation Can be absorbed.

Because the anchor insertion hole of the fixing member is a long hole, even if the position of the anchor is shifted to avoid interference with the reinforcing bars of the tunnel lining (segment, secondary lining, etc.) It is possible to respond.
Moreover, since the fixing member insertion hole of the attachment member is a long hole, the displacement of the precast member in the tunnel axis direction can be absorbed.

  Further, if the first connector insertion hole is an oblique long hole formed so as to approach the mounting member as it goes downward, the correction can be made even when a deviation in the tunnel circumferential direction occurs. Easy.

The joining structure includes a fixing plate in which the fixing member is fixed to the inner wall surface of the tunnel, and a first connecting plate standing on the fixing plate, and the mounting plate in which the mounting member is fixed to the precast member And a second connecting plate erected on the mounting plate, and the first connecting plate and the second connecting plate may be overlapped.
Further, the mounting plate may have a T-shaped section or an L-shaped section.

Furthermore, the joining method of the present invention is to form a partition wall for an evacuation passage by providing a plurality of precast tunnel cross-section inverted L-shaped wall members on the inner wall surface of a road tunnel segment constructed by the shield method. A joining method using the joining structure according to claim 1 to 3, wherein the joining method fixes an anchor to the inner wall surface of the segment, and then fixes a fixing member to the anchor. A mounting member mounting step of fixing a mounting member to the inverted L-shaped upper end of the wall member by a fixing tool; and the fixing member and the mounting member are connected to each other while the wall member is erected at a predetermined position. And a connecting step of connecting with each other.

  According to the joining structure and the joining method of the present invention, the partition wall formed in the tunnel can be easily and inexpensively constructed.

It is a perspective view which shows the joining structure of this embodiment. It is a perspective view which shows a precast member. It is a disassembled perspective view of the joining structure shown in FIG. (A)-(c) is a perspective view which shows the construction procedure of the joining structure and joining method shown in FIG. (A) And (b) is a perspective view which shows the construction procedure of the joining structure and joining method following (c) of FIG. (A) is a perspective view which shows the conventional joining structure, (b) is a side view which shows the other conventional joining structure.

  In the present embodiment, as shown in FIG. 1, a case will be described in which a partition wall for an escape passage is formed by installing a precast wall member (precast member P) in a tunnel.

  As shown in FIG. 2, the precast member P of the present embodiment has a cross-sectional view reversed by a vertical wall portion P1 standing on the tunnel floor slab and a horizontal wall portion P2 extending in the horizontal direction from the upper end of the vertical wall portion P1. It is L-shaped. In addition, the shape of the precast member P is not limited, For example, the clearance gap (opening) may be formed between the lower end of the vertical wall part P1, and a floor slab corresponding to the opening for entrance / exit of a partition wall. And the vertical wall part P1 may be divided | segmented into plurality from a viewpoint of workability | operativity.

  The precast member P is connected to another adjacent precast member P, and the lower end portion of the vertical wall portion P1 is fixed to the floor slab of the tunnel via a jig P3. The configuration of the jig P3 is not limited. Moreover, the lower end part of the vertical wall part P1 of the precast member P disposed at a position corresponding to the opening of the partition wall is not fixed to the floor slab.

  As shown in FIG. 1, the front end portion of the lateral wall portion P2 of the precast member P is fixed to a tunnel segment (inner wall surface) S by a joining structure 1.

  Bolt holes P4 for fixing the joining structure 1 are formed at corners between the end surface and the lower surface of the lateral wall portion P2 (see FIG. 4C). In the present embodiment, one bolt hole P4 is formed in each of the end surface and the lower surface of the lateral wall portion P2, but the arrangement and number of the bolt holes P4 are not limited.

The joining structure 1 of this embodiment includes a fixing member 2, an attachment member 3, a connecting tool 4, an anchor 5, and a fixing tool 6.
In the present embodiment, one joining structure 1 is configured for one precast member P, but the number and arrangement of the joining structures 1 are not limited.

The fixing member 2 is fixed to the segment S via the anchor 5.
As shown in FIG. 3, the fixing member 2 includes a fixing plate 21 that is fixed to the segment S, and a first connection plate 22 that is erected on the fixing plate 21.

The fixed plate 21 is a rectangular steel plate, and is fixed in a state where one surface is in contact with the surface of the segment.
An anchor insertion hole 23 through which the anchor 5 is inserted is formed in the fixed plate 21. The shape of the fixing member 21 is not limited.

The anchor insertion hole 23 is a long hole extending in the tunnel axis direction, and is formed so as to be able to correct a deviation in the tunnel axis direction.
In the present embodiment, the anchor insertion holes 23 are formed at two locations in the vertical direction, but the number of anchor insertion holes 23 is not limited. The upper and lower anchor insertion holes 23 and 23 are parallel to each other.

The first connecting plate 22 is made of a steel plate. A first connector insertion hole 24 through which the connector 4 is inserted is formed in the first connector plate 22.
In the present embodiment, first connection plates 22 are provided upright at both edges of the fixed plate 21 in the tunnel axis direction. That is, the first connecting plates 22 face each other with a gap in the tunnel axis direction. For this reason, the fixing member 2 has a U-shape in plan view due to the fixing plate 21 and the first connecting plate 22.

In the present embodiment, a holding metal 25 for holding the interval between the first connecting plates 22 is disposed across the first connecting plates 22 and 22.
In addition, the holding | maintenance hardware 25 should just be arrange | positioned as needed, and may be abbreviate | omitted. Further, the shape of the fixing member 2 is not limited.

  The first connector insertion hole 24 is an oblique long hole formed so as to be separated from the segment S as it goes downward (that is, so as to approach the attachment member 3). The first connector insertion hole 24 corrects the deviation in the height direction and the circumferential direction of the segment S.

The attachment member 3 is fixed to the precast member P (see FIG. 1).
The attachment member 3 includes an attachment plate 31 that is fixed to the precast member P, and a second connection plate 32 that is erected on the attachment plate 31.

The mounting plate 31 is made of a steel plate, and is disposed along the corners of the end surface and the lower surface of the lateral wall portion P2 of the precast member P. The mounting plate 31 of the present embodiment is obtained by combining a horizontal plate 33 disposed on the lower surface of the horizontal wall portion P2 and a vertical plate 34 erected on the horizontal plate 33 and disposed on the end surface of the horizontal wall portion P2. The cross section is formed in an inverted T shape.
The shape of the mounting plate 31 is not limited to the inverted T-shaped section (including the T-shaped section), and may be, for example, an L-shaped section.

  The horizontal plate 33 has a width smaller than the interval between the first connecting plates 22 of the fixing member 2, and is connected between the first connecting plates 22 in a state where the fixing member 2 and the mounting member 3 are connected. It has the shape inserted in.

  In the present embodiment, the rib member 35 is fixed along the lower surface of the horizontal plate 33. In the present embodiment, the two rib members 35, 35 are fixed to the lower surface edge of the horizontal plate 33, but the number and arrangement of the rib members 35 are not limited. Further, the rib member 35 may be disposed as necessary and may be omitted.

The horizontal plate 33 and the vertical plate 34 are formed with fixture insertion holes 36 through which the fixture 6 is inserted.
The fixture insertion hole 36 is a long hole extending in the tunnel axis direction, and corrects a deviation in the tunnel axis direction.

  The second connecting plate 32 is made of a steel plate. A second connector insertion hole 37 through which the connector 4 is inserted is formed in the second connector plate 32. In the present embodiment, second connection plates 32 are erected on both edges of the mounting plate 31 in the tunnel axial direction. The second connecting plate 32 is on the segment side of the vertical plate 34 (on the side opposite to the precast member P), and is fixed to the upper surface of the horizontal plate 33 and the vertical plate 34.

  The second connector insertion hole 37 is a long hole extending in the tunnel width direction (direction intersecting with the first connector insertion hole 24), and corrects a deviation in the tunnel width direction.

  The fixing member 2 and the attachment member 3 are connected through the first connector insertion hole 24 and the second connector insertion hole 37 in a state where the first connection plate 22 and the second connection plate 32 are overlapped. It is connected via a tool 4. At this time, the second connecting plates 32 and 32 are located between the first connecting plates 22 and 22.

  The connector 4 connects the fixing member 2 and the attachment member 3 by fastening a nut N to a shaft portion that passes through the first connector insertion hole 24 and the second connector insertion hole 37.

The anchor 5 fixes the fixing member 2 to the segment S.
As shown in FIG. 4A, the anchor 5 is driven into the segment S with the shaft portion 51 protruding. The fixing member 2 is fixed to the inner wall surface of the tunnel by fastening a nut N to the shaft portion 51 of the anchor 5 that has passed through the anchor insertion hole 23. In the drawings, the symbol W is a washer.

The fixture 6 fixes the attachment member 3 to the precast member P (see FIG. 5).
The fixture 6 passes through the fixture insertion hole 36 of the mounting member 3 and is screwed into the bolt hole P4 of the precast member P as shown in FIG. The attachment member 3 is fixed to the precast member P by a fixture 6 fastened to the bolt hole P4.

Next, the fixing method of the precast member P by the joining structure 1 will be described.
First, as shown in FIG. 4A, the anchor 5 is driven into the segment S. The anchor 5 is driven so that the shaft portion 51 protrudes from the surface of the segment S.

  Next, as shown in FIG. 4B, the fixing member 2 is fixed to the segment S by fastening the nut N in a state where the shaft portion 51 of the anchor 5 is inserted into the anchor insertion hole 23. .

  4C, the attachment member 3 is fixed to the precast member P by screwing the fixture 6 inserted into the fixture insertion hole 36 into the precast member P. As shown in FIG.

  Next, the precast member P is erected at a predetermined position of the floor slab, and the fixing member 2 and the attachment member 3 are connected as shown in FIGS. 5 (a) and 5 (b).

  When the positional relationship between the fixing member 2 and the mounting member 3 is displaced in the tunnel axis direction, at least one nut N of the anchor 5 and the fixture 6 is loosened to respond to the displacement in the tunnel axis direction. Then, the positions of the fixing member 2 and the mounting member 3 are corrected. When the positions of the fixing member 2 and the attachment member 3 are corrected, the nut N is tightened.

  When the positional relationship between the fixing member 2 and the attachment member 3 is shifted in the tunnel circumferential direction or the tunnel width direction, the connection tool 4 is loosened, and the first connection tool insertion hole 24 and the second connection tool. The displacement is corrected by the insertion hole 37.

  According to the joining structure 1 of the present embodiment, since the fixing member 2 and the attachment member 3 are divided into two, it is possible to cope with a three-dimensional relative error that occurs in the construction of the precast member P. For this reason, it is possible to drastically reduce the labor involved in correcting construction errors, member length changes, and the like, and the workability is excellent.

  In addition, even if there is a deviation between the road alignment and the shape of the segment S (tunnel alignment), since the deviation can be absorbed by the joint structure 1, the construction can be performed with high quality.

Even when the positional relationship between the precast member P and the anchor 5 is shifted, the shift can be absorbed.
For example, since the first connector insertion hole 24 is a long hole in an oblique direction, errors in the tunnel width direction and the tunnel circumferential direction can be absorbed.

  Moreover, since the anchor insertion hole 23 of the fixing member 2 is a long hole along the tunnel axis direction, the placement position of the anchor 5 can be changed so as not to interfere with the reinforcing bar inside the segment. It becomes.

  Further, when a deviation in the tunnel axis direction occurs, the position of the fixing member 2 or the mounting member 3 in the tunnel axis direction is determined by the anchor insertion hole 23 and the fixture insertion hole 36 that are long holes in the tunnel axis direction. By shifting, the shift in the tunnel axis direction can be absorbed.

  Moreover, since a partition wall can be formed only by fixing the lower end part of a precast member with a predetermined jig, and fixing an upper end part to a tunnel inner wall surface via a junction structure, it is excellent in workability.

  By constructing an evacuation passage or the like by a partition wall, it is not necessary to form an evacuation passage below the road surface in a road tunnel or the like, and an evacuation passage can be constructed easily and economically. .

  By installing the attachment member 3 on the precast member P in advance, the lifting work in the field can be reduced.

As mentioned above, although embodiment of this invention was described, this invention is not restricted to the said embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably.
For example, the structure, shape and application of the precast member P are not limited.

The segment of the tunnel may be an RC segment, a steel segment, or a synthetic segment, and its configuration is not limited.
Moreover, although the said embodiment demonstrated the case where a junction structure was employ | adopted for the tunnel formed of the segment and a partition wall was formed, a tunnel structure is not limited. For example, it may be a mountain tunnel wound with secondary lining concrete.

  In the above embodiment, the case where the joint structure extends in the lateral direction (tunnel width direction) from the precast member and is fixed to the tunnel wall surface has been described. However, the joint structure extends upward from the upper end of the precast member to the tunnel ceiling surface. It may be fixed.

In the embodiment, the first connector insertion hole is an oblique long hole and the second connector insertion hole is a lateral long hole. However, the second connector insertion hole is an oblique long hole. The first connector insertion hole may be a laterally elongated hole.
The first connector insertion hole is not necessarily a long hole in the oblique direction, and may be a long hole that is long in the vertical direction or the horizontal direction. The second connector insertion hole may be a long hole in an oblique direction or a long hole that is long in the vertical direction.

DESCRIPTION OF SYMBOLS 1 Joining structure 2 Fixing member 21 Fixing plate 22 First connection plate 23 Anchor insertion hole 24 First connection tool insertion hole 3 Mounting member 31 Mounting plate 32 Second connection plate 36 Fixing tool insertion hole 37 Second connection tool insertion Through-hole 4 Connecting tool 5 Anchor 6 Fixing tool P Precast member

Claims (4)

A joint that joins a fixed member that is fixed to the inner wall surface of a segment of a road tunnel constructed by the shield method and a mounting member that is fixed to a precast tunnel-shaped reverse-shaped wall member in a cross-sectional view, adjustable in three dimensions. Structure,
The fixing member has a long-hole anchor insertion hole formed in the tunnel axial direction and a long-hole first connection insertion hole formed in the height direction and / or the tunnel radial direction,
The mounting member has a second connecting insertion hole with a long hole formed in the height direction and / or the tunnel radial direction, and a fixing hole insertion hole with a long hole formed in the tunnel axial direction. And
An anchor fixed to the bolt hole of the segment is inserted into the anchor insertion hole,
A connector that penetrates and connects the first connection insertion hole and the second connection insertion hole is inserted,
A fixing tool that is fixed to the bolt hole at the inverted L-shaped upper end of the wall member is inserted into the fixing tool insertion hole,
The joining structure is characterized in that a deviation in a height direction and a tunnel width direction is corrected by the first connection insertion hole and the second connection insertion hole.   2. The joint structure according to claim 1, wherein the first connector insertion hole is an oblique long hole formed so as to approach the attachment member as it goes downward. The fixing member includes a fixing plate that is fixed to the inner wall surface of the tunnel, and a first connection plate that is erected on the fixing plate,
The mounting member includes a mounting plate fixed to the precast member, and a second connecting plate erected on the mounting plate,
The joining structure according to claim 1, wherein the first connecting plate and the second connecting plate are overlapped with each other. Claim 1 thru | or 3 used in order to form the partition wall for evacuation passages by attaching a plurality of precast tunnel cross-section reverse L-shaped wall members to the inner wall surface of the segment of the road tunnel constructed by the shield method. A bonding method using the described bonding structure,
The joining method includes fixing a fixing member to the anchor after fixing the anchor to the inner wall surface of the segment; and
An attachment member installation step of fixing an attachment member with a fixture to the inverted L-shaped upper end of the wall member;
A connecting step of connecting the fixing member and the mounting member by a connecting tool while standing the wall member at a predetermined position;
A joining method comprising:

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