JP2577437B2 - Tubular wall for digging hole lining - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular wall used for lining multiple drilled holes.

[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 elliptical special-section shield method has come to be used. This method uses a shielded excavator with a structure in which a plurality of cylindrical shielded excavators are connected, and excavates the ground or ground into a cross-sectional shape in which a plurality of circles are connected in a state where a part of them overlaps, On the inner surface of the excavated hole, a segment is assembled to form a cylindrical wall body, and a plurality of the cylindrical wall bodies are connected along the hole (primary lining). After filling the gap between the segment and the ground with the filling material that fills the void, concrete is rolled up on the inner surface of the primary lining (secondary lining), and the ground is supported by them, and a predetermined inner space is formed. It is to configure.

Conventionally, as this kind of cylindrical wall, FIGS.
The one shown in the figure was proposed. In FIG. 8, reference numerals 1 and 1 denote main wall portions, which are formed by arc-shaped segments (segments) 2, 2,... Bolted in the longitudinal direction. Reference numerals 3 and 3 denote branch portions having a substantially Y-shaped cross-section, which are arranged above and below the tubular wall body to connect the left and right main wall portions 1 to each other. In order to prevent collapse and deformation due to the weight of the cylindrical wall body and the pressure from the surrounding ground, a concrete connecting plate 4 is bolted. The ring-shaped assembly is bolted in the axial direction to form a cylindrical wall. In the illustrated example, two main walls 1 and 1 are formed on the left and right. However, there is also a cylindrical wall formed with two main walls 1 and 1 on the upper and lower sides. The latter is called a vertical double type. Further, a triple type, a quadruple type, and the like in which the circles are further connected have been considered. In the following description, the horizontal type will mainly be described for convenience.

Next, FIGS. 9 and 10 show the connection state of one branch portion segment 3 and the intermediate plate 4. FIG. If the connection state between the other branch portion segment 3 and the relay plate 4 is inverted, it is the same as in these figures. FIG. 9 is a front view as viewed from the direction of the excavation operation, and FIG. 10 is a side view. As shown in these figures, one intermediate plate 4 is provided for a pair of branch portions 3.
Are bolted. Further, in the illustrated example, the relay plate 4 is formed to be constricted in order to provide a passage connecting left and right (up and down in the case of a vertical dual type) of the movable tubular wall used for ventilation and movement of personnel.

"Problems to be Solved by the Invention" The above-mentioned tubular wall has the following problems.

The connection between the pair of branch segments by one concrete splice plate requires a large number of splice plates and is not economical.

A concrete 1 between the pair of branch segments
The passage connecting the left and right (up and down in the vertical type) of the cylindrical wall cannot be provided for use in ventilation and movement of personnel because they are connected by two joint plates.

The present invention has been made in view of the above circumstances, and its purpose is to reduce the number of relay plates to be used.
An object of the present invention is to provide a lining tubular wall for an excavation hole in which a communication passage can be provided widely between opposing branch segments.

"Means for solving the problem" In the present invention, in order to solve the above-described problems, a joining member is coupled to the mutually opposite ends of the branch segments, over the branch segments connected in the axial direction,
An intermediate plate is joined between these opposed joining members at an axial interval.

"Embodiment" Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 and FIG. 2 show a state near one of the branch segments in the facing state,
Illustration of the state near the other branch portion segment is omitted.

In these figures, reference numeral 5 indicates a branch segment. The end portions 6, 6,... Of the branch portions 5, 5,.
Locking portions 8, 8,... Are formed on both sides of the convex portions 7, 7,. The joining members 9, 9,... Are fixed to the locking portions 8, 8,. Each of the joining members 9, 9,... Is a quadrangular prism having thick portions 9a, 9a at both ends, and is fitted into the locking portions 8, 8,. Are extended to the branch segments 5, 5,... And are bolted to the five branch segments 5, 5,. Joining members 9, 9 ...
Are axially in contact with the other joining members 9, 9 at central positions in the width direction of the branch segments 5, A,. Also, the joining members 9, 9, ... connected to the same branch portion segments 5, 5, ... are bolted together via the protruding portions 7, 7, .... Reference numerals 10, 10... Are concrete resilient plates for supporting the pressure around the cylindrical wall. The connecting plates 10, 10,...
5 are separated from each other by a distance of three, and are erected between the joining members 9, 9. Are connected to the segments 5, 5,. In this manner, in this cylindrical wall, one intermediate plate 10, 10 is provided between a plurality of pairs of branch segments 5, 5,.
It is configured to be supported by ...

.. Between the opposite branch segments 5, 5... Which are not at the positions of A, A... This H-section steel,
After the joining members 9, 9,... Have been joined to the branch segments 5, 5,.

Next, the effect of the cylindrical wall configured as described above will be described.

In the above cylindrical wall, a plurality of pairs of branch segments 5,
Since it is possible to support the space between 5 ... with one intermediate plate 10, 10 ..., the number of necessary intermediate plates 10, 10 ... can be reduced, and the cost associated with the production, transfer and installation work can be reduced. It is economical.

Also, in the above-mentioned tubular wall, it is possible to provide a wide passage for connecting the left and right sides of the tubular wall between the branch segments 5, 5,. .

FIG. 4 shows a construction example in which the above embodiment is applied to a subway. Here, tracks 11, 11 are laid in the center of a triple cylindrical wall, and platforms 12, 12 are formed on both sides thereof. The connecting plate 10 used in the above-mentioned tubular wall body functions as columns 13, 13,... Here, and these columns 13, 13,.
There is no gap between the passengers getting on and off because the space is wide and the passage is open.

In the above embodiment, the pair of joining members are locked by the locking portions 8, 8 formed on both sides of the projections 7, 7,..., But the invention is not limited to this. As shown in the second embodiment shown in FIG.
It is also possible to use the joining member 15 in which is formed. Also, in the first embodiment, the joining members 9, 9... Are in contact with each other in the axial direction at the position A. However, the present invention is not limited to this, and as in the second embodiment, the joining members 9, 9,. Part 16,
16 may be formed, and the protrusions 16, 16... May be interposed between the joining members 15, 15 that are continuous in the axial direction.

[Effect of the Invention] The tubular wall for lining an excavation hole and the method for constructing the same according to the present invention exhibit the following excellent effects.

Since a plurality of pairs of branch segments can be supported by one intermediate plate, the number of intermediate plates required can be reduced, and the costs involved in manufacturing, transporting, and erection work can be reduced, and economy can be reduced. Good.

In addition, by reducing the number of relay plates, it is possible to provide a wide passage connecting the left and right sides of the cylindrical wall in the horizontal multiple type and the upper and lower sides of the cylindrical wall in the vertical multiple type between the branch portion segments. It is possible.

[Brief description of the drawings]

FIGS. 1 and 2 show a first embodiment of the present invention, in which the state of connection between a plurality of branch segments, a joining member and a resilient plate is enlarged, and FIG. 1 shows the progress of excavation work. FIG. 2 is a front view as viewed from a direction side, and FIG. 2 is a side view with respect to FIG. FIG. 3 is a perspective view showing a joining member used in the first embodiment, and FIG. 4 is a perspective view showing an example of construction in which this embodiment is applied to a subway. 5 and 6 show a second embodiment of the present invention, in which the state of connection between the plurality of branch segments, the joining member and the intermediate plate is enlarged, and FIG. 5 shows the progress of the excavation work. FIG. 6 is a front view as viewed from the direction side, and FIG. 6 is a side view with respect to FIG. FIG. 7 is a perspective view showing a joining member used in the second embodiment. 8 to 10 are views showing a conventional example, and FIG. 8 is a view of the cylindrical wall viewed from the direction of the excavation operation.
Fig. 9 and Fig. 10 are enlarged views showing a connection state between the branch portion segment and the intermediate plate. Fig. 9 is a front view as viewed from the traveling direction side of the excavation work, and Fig. 10 is a side view. is there. DESCRIPTION OF SYMBOLS 1 ... Main wall part, 2 ... Segment, 5 ... Branch part segment, 10 ... Splice plate, 6 ... End part, 9 ... Joint member,
15 Joint members.

Claims (1)

(57) [Claims] 1. A tubular wall for lining an excavation hole which is arranged in a multiple hole and used for lining the excavation hole, wherein arc-shaped segments are assembled in a circumferential direction. A plurality of cylindrical main walls having openings along the axial direction are formed,
In a state where these are arranged with the openings facing each other, one end and the other end of these openings are respectively connected via the branch portion segments, and a resilient plate is built between the opposed branch portion segments. In the lining tubular wall of the excavation hole in which these are connected in the axial direction, the joining member is provided at the opposing ends of the branch segments over the plurality of branch segments connected in the axial direction. A tubular wall for lining an excavation hole, wherein the joint plate is joined to the facing joining members at an axial interval.