JP2683638B2 - Cylindrical wall for lining digging hole and method for lining digging hole - Google Patents

Description

Description: “Industrial field of application” The present invention relates to a lining constructed by a segment into a tubular shape, which is used for lining an excavation hole having a cross-sectional shape symmetrical with respect to its own axis. The present invention relates to a tubular wall body for use and a method of lining an excavation hole using the tubular wall body for lining.

[Background Art] In recent years, as a large-section shield method for constructing a large-section tunnel structure such as a railway tunnel, a so-called double-circle special-section shield method has been used.

This method uses a shield excavator having a structure in which two cylindrical shield excavators are connected to each other, and excavates the ground or the ground into a cross-sectional shape in which two circles are partly overlapped and continuous. , Segments are assembled on the inner surface of the excavated hole to form a cylindrical wall body, and the cylindrical wall body is connected by connecting multiple bolts along the hole (primary lining). After filling the filling material that fills the voids between the back surface of the base, that is, between the segment and the ground, concrete is wound up on the inner surface of the primary lining (secondary lining), and the ground is supported by them, It is to construct the inner space of.

[Problems to be Solved by the Invention] By the way, even in the case of first lining such a double-drilled hole, as in the case of a circular drilled hole, the tubular wall bodies are connected to each other on the same plane. It may be required to be formed in a curved shape, or it may be required to correct the meandering on the same plane when the tubular wall bodies are connected in the axial direction. In such a case, conventionally, as in the case of a circular drill hole, a means using a tapered segment that is tapered in the axial direction of the drill hole is applied.

However, when it is desired to correct the rolling of the tubular wall A as shown in FIG. 9 or when it is desired to change the tubular wall A from the horizontal state to the standing state as shown in FIG. On the contrary, when it is desired to change the standing state to the horizontal state, there is no conventional method to deal with the situation, and this development has been awaited.

The present invention has been made in view of the above circumstances, and an object of the present invention is, when connecting in the axial direction, a cylinder for covering a drilling hole that can be connected while being rotationally displaced about the axis. To provide a method for lining a wall-shaped body and a drill hole.

"Means for Solving the Problem" In order to achieve such an object, the tubular wall body of the present invention has a tubular shape along the inner wall surface of an excavation hole having a point-symmetrical cross-sectional shape with respect to its own axis. A lining tubular wall body composed of assembled segments, wherein a bolt insertion hole for axially connecting the tubular wall bodies is provided on each of the front end face and the rear end face of the segment. Of the bolt insertion holes located on the front end surface and the rear end surface of the segment, the bolt insertion hole located on the rear end surface of the segment has a cylindrical shape with respect to the axis of the bolt insertion hole located on the front end surface of the segment. It is characterized in that the wall body is provided at a position rotated by a predetermined angle about the axis of the wall body itself.

Further, the method of lining an excavation hole of the present invention is configured by assembling the inside of the excavation hole having a cross-sectional shape point-symmetrical with respect to its own axis into an annular segment along the inner wall surface of the excavation hole. A method of lining with a tubular wall body, wherein the axis of the bolt insertion hole located at the rear end face of the segment is greater than the axis of the bolt insertion hole located at the front end face of the segment. It is installed so that it is rotated by a predetermined angle around its own axis, and when connecting the segments along the axial direction of the drill hole, the bolt insertion holes on the rear end face of the segment and the bolt insertion holes on the front end face of the segment are inserted. It is characterized in that these are bolted together with the holes and the cylindrical wall body assembled in an annular shape by the segments is rotated by a predetermined angle.

Incidentally, in the method of lining the excavation hole, the segment, a concrete body constituting the body of the segment,
It is possible to use a joint metal fitting with a bolt insertion hole embedded in the joint surface of this concrete body, and as a segment, a rectangular end plate, a side plate curved in an arc shape, and these ends. It is also possible to configure by a skin plate stretched on the outer surface of a frame body assembled by a plate and a side plate, and form a bolt insertion hole in each of the end plate and the side plate.

In order to achieve the same purpose, as a method of lining an excavation hole, an inner side of the excavation hole having a point-symmetrical cross-sectional shape with respect to its own axis is used, and a steel segment is annularly formed along the inner wall surface of the excavation hole. In the method of lining with a tubular wall body constructed by assembling in the above, when connecting the steel segments along the axial direction of the drilling hole, the steel segment to be connected from the position of the existing steel segment Also, it is arranged at a position rotated by a predetermined angle around the axis of the tubular wall body, a hole is drilled from the inside of the steel segment to the side plate of the steel segment, and the steel segment is bolted through this hole. It may be done.

[Operation] In the present invention, among the bolt insertion holes of the segment forming the tubular wall body, the bolt insertion hole located at the rear end face of the segment is located closer to the cylinder than the axis line of the bolt insertion hole located at the front end face of the segment. Since the cylindrical wall is provided at a position rotated by a predetermined angle about the axis of the wall itself, the segments are sequentially bolted to the existing cylindrical wall in the axial direction of the cylindrical wall. When stopped and assembled in an annular shape, the cylindrical wall body newly assembled by the segment will be rotationally displaced about the axis of the existing cylindrical wall body. It becomes easy to change from the standing state to the horizontal state or the opposite state.

Further, in the present invention, when the tubular wall body is constructed by the steel segment, it is possible to make a hole in the side plate of the steel segment by a drill, and in this case, it is not necessary to previously form the bolt insertion hole in the segment, The bolt insertion hole can be freely positioned in the field, and the tubular wall body can be easily rotationally displaced.

[Embodiment] Hereinafter, the present invention will be described with reference to FIGS. 1 to 4. In the embodiment, the present invention is applied to a tubular wall body for lining for lining the inside of a double-formed digging hole in which two digging holes having a circular cross section are formed so that their side portions overlap each other. Is shown, and the excavation hole is formed in a spectacle shape having a cross-sectional shape that is point-symmetric with respect to its own axis.

FIG. 1 shows an embodiment of a tubular wall body for covering according to claim 1. The tubular tubular wall body for covering has a C-shaped cross section on the left and right of a double-hole lateral drilling hole, and an inverted cross section. C-shaped main wall 1,
1 and branch portions segments 4 and 4 connecting one end portion (upper end portion) and the other end portion (lower end portion) of the main wall portions 1 and 1, and arranged between the branch segment segments 4 and 4. Plate-shaped pillar wall 5
And the subject.

Arc-shaped RC segments (segments) 2 ... Are embedded in these end faces 2c so that the main wall bodies 1, 1 have openings along the axis Z direction (direction orthogonal to the paper surface in the figure). The RC segment 2 that is formed by being fastened with bolts and nuts through the metal fittings 3 ... and that constitutes the main wall portions 1 and 1 is shown in FIGS. 2 and 3. As described above, the concrete body forming the segment is mainly formed, and the four joint surfaces (that is, the front end surface 2a, the rear end surface 2b, and the both end surfaces 2c, 2c) of the concrete body of the RC segment 2 are respectively bolted. It has a structure in which a joint fitting 3 having a bolt insertion hole 3a for inserting is inserted. Then, in the embodiment, the bolt insertion hole 3a of the joint metal fitting 3 of the rear end face 2b of the joint metal fitting 3 buried in the joint surface of the RC segment 2 has its axis located on the front end face 2a of the segment.
The greatest feature is that the cylindrical wall body is displaced from the axis line 3a at a position rotated by an angle θ counterclockwise about the axis line Z of the wall body itself (see FIG. 1).

On the other hand, as shown in FIG. 1, the branching RC segments 4 and 4 are formed in a Y shape with an appearance mainly composed of concrete, and the concrete configuration thereof is that the end face is connected to the pillar wall 5. The basic structure is composed of a base 40 having a rectangular cross section, and connecting arms 41 and 42 having a square cross section that branch from the base 40 and have their end faces connected to the main walls 1 and 1.

Here, of the two connecting arm portions 41, 42, one connecting arm portion 41 is formed longer than the other connecting arm portion 42, and the tip end side of these connecting arm portions 41, 42 is RC. The segment 2 extends in an arc plate shape with the same radius of curvature. One of the connecting arm portions 41, 42 is formed to be long and the other short.
This is because the 4 are arranged in a staggered manner in the axial direction of the tubular wall body.
The RC segment 2 is formed on the front end face 4a and the rear end face of the branch segment 4 and the front end faces of the connecting arm portions 41 and 42, respectively.
Similarly, the fittings 3 ... are embedded, and
The axis of the bolt insertion hole 3a of the fitting 3 on the rear end surface is centered around the axis Z of the wall itself, with respect to the axis of the bolt insertion hole 3a of the fitting 3 of the front end surface 4a. It is similar to the RC segment 2 described above in that it is provided at a position rotated by an angle θ counterclockwise.

In addition, the plate-shaped pillar wall 5 includes the upper and lower branching segment 4,
In order to support these branch segment 4,4 by interposing between the four, in the embodiment, the upper and lower branch segment 4,4.
It is configured to be fixed to 4 respectively.

When such a tubular wall body A is used for lining a double drill hole, the rear end surface of the segment 2 of the bolt insertion holes 3a of the segment 2 that constitutes the tubular wall body A is The bolt insertion hole 3a located at 2b is located at a position where the cylindrical wall body A is rotated by a predetermined angle about the axis of the wall body itself with respect to the axis of the bolt insertion hole 3a located at the front end surface of the segment 2. Therefore, when the segment 2 is sequentially bolted to the existing tubular wall body A in the axial direction of the tubular wall body A, and the tubular wall body A of the embodiment is assembled in an annular shape,
Since the tubular wall body A of the embodiment is rotationally displaced with respect to the existing tubular wall body A about its axis, it is possible to easily cope with rotational displacement such as rolling correction. .

That is, as shown in FIG. 4, the tubular wall body A (the tubular wall body A located on the far side in FIG. 4) already installed is connected to the tubular wall body on the front side thereof. When the tubular wall body A of the embodiment is applied as a body, the bolt insertion hole 3a of the joint metal fitting 3 embedded in the rear end surface 2b of the segment 2 constituting the tubular wall body A has its axis aligned with the front end of the segment 2. The cylindrical wall A from the axis of the bolt insertion hole 3a located on the surface.
Is provided so as to be located at a position rotated by a predetermined angle about the axis of the wall itself, so that the segment 2 that constitutes the existing tubular wall and the segment 2 that constitutes the front tubular wall When the bolt insertion holes 3a are arranged so as to be aligned with each other, the tubular wall body A on the front side is connected in a state in which the tubular wall body A on the front side is rotated by an angle θ around the axis Z thereof. Will be.

Therefore, in FIG. 4, for example, when the tubular wall body A on the other side is installed by rolling counterclockwise, the tubular wall body A on the front side is set as described above.
Rolling can be corrected by connecting while rotating clockwise.

In addition, in the above-described embodiment, the double-walled tubular wall body A assembled by the RC segment 2 has been described, but the present invention is not limited to this, and the steel segment 10 having a structure as shown in FIGS. 5 and 6, for example. Can also be used. The steel segment 10 in this case includes a pair of rectangular end plates 10a, a pair of side plates 10b curved in an arc shape connecting the end plates 10a, and a frame body assembled by the end plates 10a and 10b. Reinforcing ribs 10b made of a skin plate 10c stretched on the outer surface and bent in an L shape between the side plates 10b.
Has a structure attached.

Then, a bolt insertion hole 11 is formed in each of the end plate 10a and the side plate 10b constituting the frame body, and the bolt insertion hole 11 on the rear end side is similar to the joint metal fitting 3 of the RC segment in the segment 2 The cylindrical wall body A is provided so as to be located at a position rotated by a predetermined angle about the axis of the wall body itself with respect to the axis of the bolt insertion hole 3a located on the front end surface of the wall body. In the figure, reference numeral 12 indicates a pipe that constitutes a grout hole.

Next, one embodiment of a method for lining an excavation hole according to claim 2 will be described by taking as an example the case of rotating a horizontal double-walled cylindrical wall body in a vertical double-walled type.

As shown in FIG. 10 and the like, in order to shift the double-walled tubular wall body A constructed in the form of glasses into the double-column structure, the bolt insertion hole 3a located at the rear end face of the segment 2 is The cylindrical wall is provided so as to be located at a position rotated by a predetermined angle about the axis Z of the wall itself, with respect to the axis of the bolt insertion hole 3a located on the front end surface of the segment 2, When connecting 2 along the axial direction of the excavation hole, bolt the bolt insertion holes 3a on the rear end face of the segment with the bolt insertion holes 3a on the front end face of the segment, and bolt them together.
The segment 2 is assembled annularly along the inner wall surface of the drill hole.

And this operation (operation for assembling the tubular wall A)
Is further sequentially carried out along the axial direction of the drill hole, the cylindrical wall body A is gradually changed in angle in the vertical direction and rotated,
Finally, the horizontal state can be changed to the standing state.

This operation is a simple operation of sequentially connecting the cylindrical wall bodies A having the structures shown in FIGS. 1 to 4 and the like in the axial direction of the excavation hole. Since it can be performed in the same way as the segment concatenation operation,
Workability and workability on site can be improved.

Next, using the method for lining an excavation hole according to claim 5, a case of transferring a horizontal double-walled tubular wall body to a vertical double-walled tubular wall body as shown in FIG. 10 will be described. To do. In the lining method in this case, the steel segment 10A shown in Fig. 7 is used.
Is used. The basic structure of this steel segment 10A is the same as the steel segment 10 shown in FIGS. 5 and 6, and the pair of rectangular end plates 10a and an arc shape connecting the end plates 10a are curved. A pair of side plates 10b
And a skin plate 10c stretched on the outer surface of the frame body assembled by these end plates 10a and side plates 10b.
A reinforcing rib 10d bent in an L shape is attached between 0b.

However, in this embodiment, a pair of side plates curved in an arc shape is used.
The feature of 10b is that no bolt insertion hole is formed.

Then, in lining the drilling hole using the steel segment 10A having such a configuration, when connecting the steel segment 10A along the axial direction of the drilling hole, the steel segment 10A to be connected is the existing steel. Segment 10A
The position of the steel segment 10 is offset from the position of the tubular wall body by a predetermined angle about the axis of the tubular wall body.
From the inside of A, a hole is drilled in the side plate 10b of the steel segment 10A, and the steel segment 10A is bolted through this hole. In the illustrated example,
A steel segment is used as a branch segment 11 that connects the main wall portions 1 and 1 formed by the steel segment 10A. Further, the branch segment 11 has a Y-shaped appearance. Side plate 11a and rectangular end plate 11b
And a contact plate 11c forming a joint surface with the column wall 5, and a side plate 11a.
And a skin plate 11d stretched over the outer surface of the end plate 11b.

In the example, the steel segment
While aligning the positions of the bolt holes of the existing segment with the side plate 10b of 10A, it is possible to adjust the position of the bolt holes by drilling holes in the field,
The segments can be easily connected to each other, and the alignment of the bolt holes between the segments is not required, making it easy to correct the rolling by the cylindrical wall body and change the position in the vertical or horizontal direction. It will be possible to achieve.

In addition, in the said Example, although the case where two continuous drill holes were lined was demonstrated, this invention is not restricted to the above-mentioned two continuous drill holes, and a cross-sectional shape point-symmetrical with respect to the axial line may be used. As long as it has a drill hole, it can be applied to a drill hole having an oval cross-sectional shape, for example.

“Effects of the Invention” As described above, according to the present invention, the following excellent effects can be obtained.

(A) In the tubular wall for lining an excavation hole according to the present invention, the tubular wall of the present invention is rotated by a predetermined angle about its axis with respect to the already installed tubular wall. Since it is configured so that the bolt insertion hole located on the rear end surface of the segment matches the bolt insertion hole located on the front end surface of the tubular wall body already installed,
It is possible to connect the existing tubular wall body by bolting it while rotating it about the axis by a predetermined angle. Therefore, when the tubular wall body is installed by rolling, the rolling is corrected by connecting the tubular wall body of the present invention in a state in which the tubular wall body is rotated in a direction opposite to the rolling direction. be able to.

Moreover, if the cylindrical wall bodies of the present invention are sequentially connected while being rotated by a predetermined angle about the axis, for example,
The rotation direction can be changed so that the tubular wall body changes from the horizontal state to the standing state.

(B) Further, in the method of lining an excavation hole according to the present invention, the segments are sequentially bolted in the axial direction of the tubular wall body and assembled in an annular shape so that the segments are newly assembled into a tubular shape. Since the cylindrical wall can be rotationally displaced with respect to the existing cylindrical wall around its axis, it is easy to correct the rolling and change from the standing state to the horizontal state or vice versa. Will be possible.

(C) Further, in the present invention, when the tubular wall body is constructed by the steel segment, it is possible to make a hole in the side plate of the steel segment by a drill. In this case, therefore, it is necessary to previously form the bolt insertion hole in the segment. Therefore, the bolt insertion hole can be freely positioned in the field, and the tubular wall body can be easily rotationally displaced.

(D) As described above, the present invention is performed while connecting the conventional tubular wall body in which the fitting fitting on the front end face of the segment and the fitting fitting on the rear end face are provided at the same position in front view. By using, it becomes difficult to perform the rolling correction, which is difficult with the conventional lining method.

[Brief description of the drawings]

1 to 4 show one embodiment of the present invention.
Fig. 1 is a front view of the tubular wall for lining, Fig. 2 is a side view of the RC segment that constitutes the tubular wall for lining, Fig. 3 is its plan view, and Fig. 4 is an excavation hole. The front view of the tubular wall for lining shown for explaining the lining method, FIG. 5 is a perspective view of a steel segment applicable to the tubular wall for lining, and FIG. 6 is a side view thereof. FIG. 7 and FIG. 8 are shown for explaining one embodiment of the method for lining an excavation hole according to claim 5,
FIG. 7 is a perspective view showing an example of a steel segment used in this lining method, FIG. 8 is a perspective view showing a state in which a tubular wall body is assembled with the steel segment, and FIG. 9 is a tubular wall for lining. FIG. 10 is a front view showing a rolled state and a normal state of the body, and FIG. 10 is a front view showing a mode in which the lining tubular wall body is displaced from the horizontal state to the standing state or the opposite state. 1 ... Main wall part, 2 ... RC segment, 3 ... Joint fitting, 3a ... Bolt insertion hole, 4 ... Branch part segment, 5 ... Pillar wall, A ... Cylindrical wall body, 10,10A …… Steel segment.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Munetaka Ozeki 2-6-21 Yaesu, Chuo-ku, Tokyo Rose Bay Yaesu Building Ishikawajima Construction Materials Co., Ltd. (72) Inventor Kazuo Shimizu 2-chome, Yaesu, Chuo-ku, Tokyo No. 6-21 Rohsbay Yaesu Building Ishikawajima Kenzai Kogyo Co., Ltd. (72) Inventor Hirohide Hashimoto 2-6-21 Yaesu, Chuo-ku, Tokyo Rohsbay Yaesu Bldg. Ishikawajima Kenzai Kogyo Co., Ltd. Katsuharu Ando (56 ) References JP-A-62-182398 (JP, A)

Claims (5)

(57) [Claims] 1. A tubular wall body for lining, comprising a segment assembled in a tubular shape along an inner wall surface of an excavation hole having a cross-sectional shape symmetrical with respect to its own axis, said tubular wall body comprising: The front end face and the rear end face of the segment are provided with bolt insertion holes for connecting the tubular wall bodies to each other in the axial direction, and of the bolt insertion holes located on the front end face and the rear end face of the segment, The bolt insertion hole located on the rear end surface is displaced from the axis line of the bolt insertion hole located on the front end surface of the segment to a position where the cylindrical wall body is rotated by a predetermined angle about the axis line of the wall body itself. A tubular wall body for lining an excavation hole, which is provided. 2. The inner surface of the excavation hole having a cross-sectional shape that is point-symmetric with respect to its own axis is covered with a tubular wall body formed by assembling segments along the inner wall surface of the excavation hole in an annular shape. In the method, the axis of the bolt insertion hole located at the rear end face of the segment is rotated by a predetermined angle about the axis of the wall itself, relative to the axis of the bolt insertion hole located at the front end face of the segment. The bolt insertion holes on the rear end face of the segment and the bolt insertion holes on the front end face of the segment are aligned and bolted when connecting the segments along the axial direction of the excavation hole. Then, a method of lining an excavation hole, which comprises rotating a cylindrical wall body assembled in an annular shape by segments by a predetermined angle. 3. The excavation hole according to claim 2, wherein the segment is composed of a concrete main body which constitutes the main body of the segment, and a joint fitting with a bolt insertion hole which is embedded in a joint surface of the concrete main body. Lining method. 4. A segment comprises a rectangular end plate, a side plate curved in an arc shape, and a skin plate stretched on the outer surface of a frame body assembled by the end plate and the side plate. The method for lining an excavation hole according to claim 2, wherein bolt insertion holes are formed in the plate and the side plate, respectively. 5. The inner wall of a drill hole having a cross-sectional shape symmetrical with respect to its own axis is covered by a tubular wall body formed by assembling steel segments annularly along the inner wall surface of the drill hole. Method, when connecting the steel segments along the axial direction of the drill hole, rotate the steel segment to be connected by a predetermined angle around the axis of the tubular wall body rather than the position of the existing steel segment. A method of lining an excavation hole, which is characterized by arranging the steel segment in a displaced position, drilling a hole from the inside of the steel segment to the side plate of the steel segment, and bolting the steel segment through this hole. .