JPH0366899A - Cylindrical wall for hole covering work - Google Patents

Abstract

PURPOSE:To simplify connecting works by erecting a segment in the form of arc disc, constructing a C-form main wall, coupling together the ends of the main wall, installing a core pillar in the extent over the coupling parts, and forming a cylindrical wall body. CONSTITUTION:A cylindrical wall body 3 for covering work is composed of main wall parts 4, 4 constructed in the C form for each excavation hole 2a and a core pillar 5 installed in the extent between two coupling parts. Joint metal pieces 7 provided with a bolt clearance hole 7a are embedded at the four end faces of an RC segment 6 and coupled together by bolt connection. The RC segments 6A, 6A at the coupling parts are coupled with the ends of the main walls 4, 4, and the joint part 9 of the core pillar 5 is inserted between the joints 8, 8, and the joints 8, 9 are put one over another and coupled fast by a pin 11. Thus coupling of e core pillar 5 can be made easily.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a cylindrical wall body for lining the circumferential wall of a double-circular excavation hole in which a plurality of excavation holes each having a circular cross section partially overlap each other. It is related to.

"Prior Art" In recent years, a shield construction method called a double-circular special cross-section shield construction method has been used to Fli large-section tunnels such as railway tunnels.

This construction method uses a shield excavator with a structure in which multiple cylindrical shield excavators are connected, and a part of multiple circles is ff.
A cylindrical wall for lining is constructed on the surrounding wall while excavating the ground in a continuous cross-sectional shape with 1 ffl.

The lining tubular wall body has a large number of arcuate plate-like segments I-(RC
A common structure is that the ends of the main walls are connected to each other, and a central pillar is installed between the connecting parts.

In such a cylindrical wall for lining, the ends of the main walls are connected to each other, and the middle pillars are connected to the main wall by continuous bolt insertion holes provided at the connecting ends. A bolt connection method is adopted in which bolts are inserted into these bolt insertion holes and tightened with nuts.

``Problem to be Solved by the Invention'' However, in the case of such a cylindrical wall for lining, as mentioned above, in order to connect the main walls to each other and the middle pillar to the main wall by bolts, first, The procedure is to connect the main walls to each other and then connect the middle pillars, and since multiple bolts are used for one connection, the work is complicated and time-consuming, and the number of bolts used is The problem is that the number of pieces is large and the cost is high.

The present invention has been made in view of the above circumstances, and provides a tube for lining an excavated hole, which can simplify the connection of the main walls to each other and the middle pillars to the main walls, and can also reduce costs. The aim is to provide a shaped wall.

"Means for Solving the Problems" The present invention has been made to achieve the above object, and is directed to a circumferential wall of a double-circular drilled hole in which a plurality of drilled holes with a circular cross section partially overlap with each other. On the other hand, for each excavation hole having a circular cross section, a large number of arc plate-like segments are assembled along the peripheral wall of the excavation hole to construct a C-shaped main wall, and
In a cylindrical wall body for lining an excavated hole, which connects the ends of these main wall parts and further incorporates a middle pillar between these connecting parts, the connecting ends of the main wall parts are connected to each other. and at the connecting end of the middle pillar to the earthen wall part,
Joint plates each having pin penetration holes that overlap each other in the length direction of the excavated hole and communicate with each other in this state are provided, and each of these joint plates is connected by a pin penetrated into each of the pin penetration holes. It is characterized by

"Function" According to the cylindrical wall body for lining an excavated hole of the present invention, each joint part of the segments to be connected and the joint part of the middle column are stacked on top of each other, and one pin penetration hole formed in these is overlapped with each other. By penetrating the pin, the main walls and the middle pillar can be connected at the same time.

Therefore, the work of connecting the main walls to each other and the middle pillar to the main wall is simplified, and the time required for the work is also significantly reduced. Furthermore, since only one pin is used for each connection, costs can be reduced compared to conventional systems that use many bolts and nuts.

"Embodiment" An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows a cross section of a tunnel that has been primarily lined with the cylindrical wall for lining according to this embodiment. In the figure, reference numeral 1 indicates the ground, and 2 indicates the ground 1 excavated by the shield excavator. This is an excavated hole formed by In this case, two shield excavators are connected, and therefore, the cross section of the excavated hole 2 is such that the two excavated holes 2a, 2a having a circular cross section partially overlap with each other. The reference numeral 3 is the lining cylindrical wall body.

This lining cylindrical wall body 3 is a main body constructed in a C-shape (although the excavation hole 2a on the right side in the figure has an inverted C-shape) along the peripheral wall of each excavation hole 2a. Wall part 4.4
and a middle pillar 5 that is built in between the two connecting parts of these main wall parts 4.4.

The main wall portion 4 includes a large number of arcuate plate-shaped RC segments (
(hereinafter referred to as the RC segment) 6. is the drilled hole 2
It is assembled along the peripheral wall of a. Embedded in the four end faces of each RC segment 6 are joint fittings 7 in which bolt insertion holes 7a are formed at regular intervals. Then, the joint fittings 7 on both end faces in the length direction are bolted together using the bolt insertion holes 7a, so that these R
The C segments 6 are interconnected along the peripheral wall of the excavated hole 2a, thereby forming the main wall portion 4.

The middle pillar 5 has a prismatic shape with a depth equal to the width of the RC segment 6, and both ends thereof are connected to the upper and lower connecting parts of the main wall parts 4.

Among the RC segments 6..., the RC segments 6 assembled at the ends are connected to each other, and the main walls 4 are connected to each other.As shown in FIG. An end surface 6a on the connection side of each RC segment 6 (hereinafter referred to as a connection RC segment 6A) has a substantially U-shaped cross-sectional outline, and from the end surface 6a to the connection section RCC.
A joint portion 8 protruding in the length direction of the DAGUN) 6A is integrally provided.

In this embodiment, one joint portion 8 is provided at one end of the end surface 6a of the connecting portion RC segment 6A, and the connecting portion RC segment 6A is connected.

When the end surfaces 6a of 6A are opposed to each other, they are arranged alternately. Further, the joint portion 8 is formed with a pin penetration hole 8a that penetrates in the width direction of the connecting portion RC segment 6A.

Also, on both end surfaces 5a, 5a of the middle pillar 5, a second
As shown in the figure, joint parts 9 similar to the joint part 8 described above are each provided integrally with the middle pillar 5. That is, this joint portion 9 has a substantially U-shaped cross-sectional profile, projects in the length direction from the center of the end surface 5a, and is further formed with a pin penetration hole 9a that penetrates the center column 5 in the depth direction. .

Note that a sheet-shaped water stop material 10 made of a material such as rubber is attached to the circumferential surface of each of the joint parts 8.9.

and connecting portion RC segments 6A to be connected to each other,
6A are respectively connected to the ends of each main wall 4.4 (
At this time, the joint parts 8 of the middle column 5 are inserted between the two joint parts 8.8, and the joint parts 8.9 are alternately arranged in the drilled hole 2. The pins are placed in a state where they overlap each other in the length direction, and then the pins ti are inserted into the respective pin penetration holes 8a and 9a which communicate with each other at this time,
Both connecting portion RC segments 6A, 6A and the middle pillar 5 are connected to each other. The pin 11 has approximately the same length as the RC segment 6, has a diameter such that it fits tightly into the pin penetration holes 8a and 9a, and is inserted through the joint portion 8 without protruding.

As described above, the ends of the main wall portions 4.4 and the middle pillars 5 are connected to each other, and the lining cylindrical wall body 6 is constructed. As shown in FIG. 3, a large number of these lining cylindrical walls 3 are connected in the length direction of the excavated hole 2 by bolting together the joint fittings 7, and the next lining is completed. It will be done.

In addition, as shown in FIG. 3, in each main wall part 4.4 of the lining cylindrical wall body 3 connected in this way, the upper wall part 4.4.
The connecting parts RCC DAGUN) f3A... which are connected to one end and the other end of 4 and are connected to each other are alternately short, so that in each RC segment 6, the length of the drilled hole 2 is They are arranged in a staggered manner along the direction.

According to the lining cylindrical wall body 3 having the above configuration, each joint part 8.8 of the connecting part RC segment 6A to be connected and the joint part 9 of the middle pillar 5 are overlapped with each other, and the pin penetration formed therein is By inserting t pins 11 into the holes 8a and 9a, the connecting portions RCC Dagun 1-6A and the middle pillar 5 can be connected simultaneously.

Therefore, the connection between the main wall parts 4 and the main wall part 4 of the middle pillar 5
This simplifies the connection work for the connection parts and greatly reduces the time required for the work. In addition, since only one pin +1 is needed for each connection, costs can be reduced compared to conventional systems that use many bolts and nanos.

Next, other embodiments of the present invention will be described with reference to FIGS. 4 to 7.

Reference numeral 20 in FIG. 4 is a lining cylindrical wall body of this embodiment constructed in the excavated hole 2, and this lining cylindrical wall body 20 is used for each excavation hole 2 as in the above embodiment. Each hole 2a has a C-shape along its peripheral wall (excavated hole 2a on the right side in the figure).
It is composed of main wall parts 21.21 constructed in an inverted C shape) and a central pillar 22 built in between two connecting parts of these main wall parts 21.21, The arc plate-shaped segment 23 and the middle pillar 22 that constitute the main wall portion 21 are made of steel.

As shown in FIG. 5, the steel segment (hereinafter referred to as steel segment) 23 includes a pair of main TFIs 24 having an arc shape and arranged opposite to each other, and these main girders 24.
It consists of an end plate 25 that connects both ends of the box, a skin plate 26 that covers the convex surface of the box-shaped body formed by the main girder 24 and the end plate 25, and a rib 27 fixed inside.

Bolt insertion holes 24a and 25a are formed in the main girder 24 and the end plate 25 at regular intervals, respectively.
By bolting the end plates 25 together using the bolt insertion holes 25a, the steel segments 23
are interconnected along the circumferential wall of the excavated hole 2a, thereby forming the main wall portion 4.

As shown in FIGS. 4 and 6, the middle pillar 22 is made of steel plate material and has a prismatic bottom shape, and its depth is the same as the width of the steel segment 23. are connected to the upper and lower connecting parts of the main wall part 4.4.

Among the steel segments 23..., the steel segments 23 assembled at the ends are connected to each other, and the main wall parts 4 are connected to each other.As shown in FIG. The end plate 23a on the connection side of each steel segment 23 (hereinafter referred to as the connection steel segment 23A) has a substantially U-shaped cross-sectional profile, and extends from the end plate 23a in the length direction of the connection steel segment 23A. A joint plate 28 (joint portion) that protrudes from is integrally provided.

In the case of this embodiment, the joint plates 28 include one at one end of the connecting portion (RCC DAGUN) 23A, one at a location slightly spaced from the other end, and one at the center between them. A total of three steel segments 23A, 23A are provided, and when the end surfaces 6a of the connecting steel segments 23A, 23A are opposed to each other, they are positioned alternately. Further, the joint plate 28 is formed with a pin penetration hole 28a that penetrates in the width direction of the joint steel segment 23A.

Further, each end plate 22a fixed to both ends of the middle pillar 22,
As shown in FIG. 6, the joint plate 22a is provided with a joint plate (joint portion) 29 similar to the joint plate 28 described above. One joint plate 29 is provided at the center of the end plate 22a, and one on each side of the end plate 22a at the same spacing as the mutual spacing of the joint plates 28 provided on the end plate 25 of the connecting steel segment 23. , a total of three are provided. Further, each joint plate 29 is formed with a pin penetration hole 29a that penetrates the center column 5 in the depth direction.

And the connecting steel segments 2 to be connected to each other
3A and 23A are respectively connected to the ends of each main wall 21.21 (in this case, the respective joint plates 28 overlap with each other at intervals), the joint plates 29 of the middle pillar 22 are connected to the ends of the main walls 21.21. The two joint parts 28 are inserted between the joint plates 28 so that they alternately overlap each other in the length direction of the excavated hole 2, and then each pin penetration hole 28a, 29 is inserted between the joint plates 28 and communicates with each other.
A pin 30 is inserted through a, thereby connecting the two connecting portion steel segments 23A, 23A and the middle pillar 22 to each other.

It is preferable to insert an elastic body 31 such as rubber between each joint plate 28, 29, as shown in FIG. 7, so that the joint plates 28, 29 do not shift in the length direction of the excavated hole 2. .

As described above, the ends of the main wall parts 21 and 21 and the middle pillar 2
2 are connected to each other to form a lining cylindrical wall body 20.
is being constructed. As shown in FIG. 7, this lining cylindrical wall body 20 is connected to the excavated hole 2 by bolting the main girders together using the bolt insertion holes 24a of the main girders 24 of the steel segments 23. A large number of them are connected in the length direction, and a second lining is made.

Also in the lining tubular wall body 20 of this embodiment, as in the previous embodiment, the connection work between the main wall parts 21 and the connection work between the main wall parts of the middle pillars 22 can be performed at the same time. The process is simplified, the working time is significantly shortened, and the cost is low.

"Effects of the Invention" As explained above, according to the cylindrical wall body for lining a scraped hole of the present invention, it is possible to connect the main walls to each other and to connect the main walls of the central pillar to the connection part. This simplifies the work as it is done at the same time, greatly shortens the work time, and reduces costs compared to conventional methods that use bolts and nuts frequently.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figures 1 to 3 are diagrams showing an embodiment of the present invention, and Figure 1 shows a tunnel that has been primarily lined with the lining cylindrical wall. 2 is an exploded perspective view of the connecting portion, FIG. 3 is a partial plan view of the connected tubular wall for lining, and FIGS. 4 to 7 show other embodiments of the present invention. FIG. 4 is a cross-sectional view of a tunnel that has been primarily lined with the lining cylindrical wall, FIG. 5 is a rear perspective view of the steel segment, and FIG. 6 is an exploded view of the connecting part. The perspective view and FIG. 7 are partial plan views of the connected cylindrical wall bodies for lining. 5.22...Middle pillar, 6...RC segment, 6A...Connection RC segment, 8.9...
...Joint part, 8a, 9a...Pin penetration hole, 11.31...Pin, 23...Steel segment, 23A...
...Connection steel segment, 28.29...
・Joint plate (joint part), 28a, 29a...Pin penetration hole, 30...Pin.

Claims (1)

[Scope of Claims] For the circumferential wall of a double-circular excavated hole in which a plurality of excavated holes with a circular cross section partially overlap with each other, for each excavated hole with a circular cross section, a large number of holes are formed along the circumferential wall of the excavated hole. A C-shaped main wall is constructed by assembling the arc plate-like segments of , and the ends of these main walls are connected to each other, and a center column is installed between these connecting parts to cover the excavated hole. In the cylindrical wall for construction, the connecting ends of the main walls that are connected to each other and the connecting ends of the middle pillars to the main wall overlap each other in the length direction of the excavated hole, and the condition is such that A cylindrical wall body for lining an excavated hole, characterized in that joint plates each having a pin penetration hole communicating with each other are provided, and these joint plates are connected by a pin penetrated into each of the pin penetration holes. .