JP3586053B2 - Steel segment for shield tunnel construction and shield method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a steel segment for constructing a shield tunnel and a shield method.
[0002]
[Prior art]
The shield tunnel construction method (also called the shield method) is to excavate at the tip of an excavator called a shield machine that can simultaneously excavate the entire surface within a predetermined diameter, and at the tail end (tail part) of the tunnel immediately after excavation. This is a method of sequentially lining the inner surface. The lined tunnel is called a shield tunnel.
[0003]
Conventionally, when lining the tunnel, the inside circumference of the tunnel was divided into several sections (often about 5 to 6 sections) so that a section of unit length could be lined, and joints (for bolting) were attached to the circumferential and axial ends. Of steel or RC (reinforced concrete) segments with flanges, welding grooves or male and female working ends for insertion, etc. The same applies hereinafter) (for example, supplied by Kawasho Lease System Co., Ltd.) Steel segment, RC segment supplied by Ishikawajima-Harima Heavy Industries Co., Ltd.) is loaded on a bogie or the like and transported to the tail part of the shield machine at the tip of the tunnel, where the loaded members are connected to each other or between the loaded member and the existing member. Are joined by welding, bolting, caulking, etc., through joints, and assembled into a tube having a predetermined representative diameter called the shield diameter. It was.
[0004]
Such a method has been adopted because if the pipe is not divided into three or more segments by dividing it in the circumferential direction, the segments are passed through a shield tunnel formed of an existing member to form a shield tunnel. This is because it was difficult to transport to the tip.
[0005]
[Problems to be solved by the invention]
However, the conventional method has a problem that the number of parts is large because there are many joining points of the members, and the number of work steps such as joining and water stop processing is also large, and the lining work is shielded because the work takes time. Improvements have been desired because there is a problem that the excavating speed of the machine is rate-limiting and the construction distance per unit time does not increase.
[0006]
Accordingly, the present invention provides a steel segment for constructing a shield tunnel and a steel segment for constructing a shield tunnel capable of performing the lining at the tail portion of the shield machine, in particular, assembling the segment more economically and efficiently than before. The purpose is to provide the used shield method.
[0007]
[Means for Solving the Problems]
A first aspect of the present invention is a steel having joints at circumferential and axial ends, which is joined via the joint near the tail of a shield machine at the time of constructing a shield tunnel and is assembled into a pipe having a predetermined shield diameter. a segment, first, Ri Do from the second steel piece, the first steel tube piece is slit tube slits circumferentially one place on the steel pipe having a diameter smaller than the shield diameter, the second steel tube piece is the steel segment shield tunnel construction, wherein interpolation pieces der Rukoto interpolating the slit when the spreading of the slit tube on the shield diameter.
[0009]
According to a second aspect of the present invention, in a shield method, a pipe having a predetermined shield diameter is provided with joints at ends in a circumferential direction and an axial direction. Simultaneously or disperse a plurality of steel pipe pieces to be assembled, when the subsequent equipment of the shield machine is transported through the existing shield tunnel extending along the tunnel wall to near the tail part of the shield machine, the plurality of steel pipe pieces are slit. This is a shield method characterized by using a pipe and an interpolation piece .
[0010]
According to a third aspect of the present invention, in the second aspect of the present invention, both ends in the circumferential direction are supported by separate carriages so as to expand the slit tube when the slit tube is transported.
The fourth of the present invention, in the second invention, the slit tube flares jig during conveyance of the slit tube, and Turkey be supported in contact with a magnet roller periphery to the tunnel wall of the steel pipe member Make a summary.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
1A and 1B are schematic views showing an example of an assembled state of a steel segment according to the present invention, wherein FIG. 1A is an overall view, and FIGS. 1B and 1C are Aa arrow view and B section sectional view, respectively. , (D) is another view of the joint at the circumferential end, wherein reference numerals 1 and 10 denote steel segments and A and B denote first and second steel pipe pieces, and 2 denotes a joint A , B denote a circumferential end and an axial end, 3 denotes a sealing material (water-expandable rubber or the like), 4 denotes a welded portion, and 5 denotes a bolt.
[0013]
In the circumferential direction, for example, as shown in FIGS. 1B and 1D, the joint 2A of the first and second steel pipe pieces 1A and 1B is sealed with a sealing material such as a water-expandable rubber. 3 is fastened by bolts 5. The axial direction may be performed in the same manner as in the circumferential direction. For example, as shown in FIG. 1 (c), the steel segment 1 is disposed at the axial end (preferably the tip side in the tunnel excavation direction). It is more efficient to weld a plug-in joint as the joint 2B in the welded portion 4 at the entire circumference thereof, wind the seal material 3 around the outer periphery of the plug-in joint, and insert the next steel segment 10.
[0014]
As described above, since the steel segment of the present invention is composed of the two members of the first and second steel pipe pieces, a member obtained by dividing a pipe having a predetermined shield diameter into multiple parts (5 to 6 divisions) in the circumferential direction. Compared with the conventional method that requires joining and assembling, the number of parts is significantly reduced, and the joining length is also shortened, so that the work man-hour can be significantly reduced, and the working time is also shortened, so the shielding machine Drilling speed can be increased.
[0015]
The reason why the number of steel pipe pieces is limited to two is that if it is one (specifically, a sheet-wound pipe (roll-in pipe)), when transporting through the tunnel, the following equipment of the shield machine (hydraulic control equipment, sludge pump, (1) To avoid interference with power supply cables, pipes for sending and discharging mud (pipes that supply high-pressure water and pulverize excavated soil to discharge), (1) reduce the amount of entanglement by increasing or flattening It is necessary to reduce the diameter, or (2) it is necessary to embrace the entire following equipment of the shield machine in the pipe, but in (1) there is a limit to the amount of diameter reduction due to the restriction of roundness during assembly, and in (2) This is because the extra work of temporarily disconnecting the equipment following the shield machine to provide the end reduces the work efficiency, and if there are three or more steel pipe pieces, the assembly time will be longer due to the larger number of joints. In addition, structural stability and water resistance after assembly This is because the decrease in avoidable.
[0017]
As shown in FIG. 1, the first present invention has a joint 2 ( 2A, 2B ) at the circumferential and axial ends and has a joint 2 ( 2A, 2B, 2A, 2B ) near the tail of a shield machine when constructing a shield tunnel . It is joined via a 2B) a steel segments 1 are assembled in tubular body having a predetermined shield diameter d s, the first and second steel strip 1A, the shield tunnel construction steel, characterized in that it consists 1B As shown in FIG. 2, a slit pipe 7 having a slit 7A formed in a circumferential direction at a single location in a steel pipe 101 having a diameter d smaller than the shield diameter ds as a first steel pipe piece 1A, as shown in FIG. Is used as a second steel pipe piece 1B, and an interpolating piece 8 for interpolating the slit 7A when the slit pipe 7 is expanded to the shield diameter ds.
[0019]
In the following, the present invention of the second to fourth, the shield tunneling, the assembly area (shield machine tails near the tunnel deepest) a steel segment for constructing a plurality of shield tunnel without interfering with the shield machine subsequent facilities This relates to a method suitable for carrying, and will be described below with reference to the drawings.
[0020]
In the second embodiment of the present invention, as shown in FIG. 3, the steel segment 1 is connected to subsequent equipment (shield equipment subsequent equipment) 20 such as a power line 21A, a control cable 21B, a mud pipe 22A, and a mud pipe 22B. upon locked by stop 23 conveys through within existing shield tunnel 50 which extends in Tsutai tunnel wall to the tail portion near the shield machine, when a plurality of steel pipe pieces you with the slit pipe 7 and interpolation piece 8 It is a method of saying . Na us, 51 is a concrete punch設済the bottom of the existing shield tunnel 50.
[0021]
This makes it possible to afford can take between the steel segments 1 and tunnel walls, it is possible to smoothly convey it past the trailing equipment 20.
In the third embodiment of the present invention, as shown in FIG. 4, the subsequent equipment 20 such as the power supply line 21A, the control cable 21B, the mud pipe 22A, and the mud pipe 22B is connected to the steel segment 1 by the locking member 23. When transported to the vicinity of the tail portion of the shield machine through the existing shield tunnel 50 extended toward the center of the tunnel and locked to the tunnel, separate bogies 30A at both ends in the circumferential direction so as to expand the first steel pipe piece 1A. , 30B.
[0022]
As a result, if the trucks 30A and 30B run on both sides of the column 9, the steel segments 1 supported at both ends in the circumferential direction by the trucks 30A and 30B that do not intersect with the column 24 include the subsequent equipment 20 inside without contact. In this state, the paper is smoothly transported.
According to a fourth aspect of the present invention, as shown in FIG. 5, in the above method, instead of supporting both ends of the steel pipe piece in the circumferential direction with separate bogies, the outer periphery of the first steel pipe piece 1A is, for example, circular holding jig. While maintaining the cross-sectional shape by expanding with the tool 41, it is preferably supported by a plurality of magnet rollers (roller bearings are made of magnets and are attracted to the outer surface of the steel segment 1) 40 abutting on the tunnel wall. It was made.
[0023]
This method is applied to a steel segment having a sufficiently large springback (elastic bending return force), and interference between the steel segment 1 and the subsequent equipment 20 can be effectively avoided as shown in the figure. In addition, according to this method, since the magnet roller can be easily attached and detached, it is more advantageous in terms of workability than the carriage transport method.
[0026]
【The invention's effect】
As described in detail above, according to the present invention, when constructing a shield tunnel, the lining at the tail of the shield machine can be performed more advantageously than before in terms of economy and efficiency, and the structural stability of the shield tunnel can be improved. It has an excellent effect of improving the water stoppage.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an example of an assembled state of a steel segment according to the present invention, in which (a) is an overall view, (b) and (c) are Aa arrow views and (B) sectional views of (a), respectively. (D) is another form figure of the joint of a circumferential end part.
FIG. 2 is an explanatory diagram of the first present invention.
FIG. 3 is an explanatory diagram of the second invention.
FIG. 4 is an explanatory view of a third invention.
FIG. 5 is an explanatory diagram of the fourth invention .
[Explanation of symbols]
1,10 steel segment
1A First steel pipe piece
1B Second piece of steel pipe
2A coupling (circumferential end)
2B fitting (axial end)
3. Sealing material (water-swellable rubber, etc.)
4 Welded part 5 Bolt 6 Cutting position 7 Slit tube
7A slit 8 interpolation piece
20 Subsequent equipment (following equipment of shield machine)
21A power line
21B control cable
22A mud pipe
22B Drainage pipe
23 Latch
24 props
30,30A, 30B cart
40 Magnet roller
41 Circular holding jig
50 Existing shield tunnel
51 concrete
100,101 steel pipe

Claims (4)

A steel segment which has a joint at the circumferential and axial ends and is joined via the joint near the tail of the shield machine at the time of constructing the shield tunnel and is assembled into a pipe having a predetermined shield diameter,
The first and second steel pipe pieces,
The first steel pipe piece is a slit pipe in which a steel pipe having a diameter smaller than the shield diameter is provided with a slit at one location in the circumferential direction, and the second steel pipe piece expands the slit pipe when the slit pipe is expanded to the shield diameter. A steel segment for constructing a shield tunnel, which is an interpolating piece for interpolating. In the shield method, a plurality of steel pipe pieces which have joints at circumferential and axial ends and are joined via the joints near the tail portion of the shield machine at the time of constructing a shield tunnel and are assembled into a pipe body having a predetermined shield diameter. The slit pipe and the interpolation according to claim 1, wherein the plurality of steel pipe pieces are simultaneously or dispersedly transported by the succeeding equipment of the shield machine through the existing shield tunnel extending along the tunnel wall to the vicinity of the tail portion of the shield machine. A shield method characterized by using pieces . 3. The shield method according to claim 2, wherein both ends in the circumferential direction are supported by separate carriages so as to expand the slit tube when the slit tube is transported. Wherein the slit tube flares jig during transportation of the slit tube, shield tunneling of 請 Motomeko 2 wherein support in contact with the magnet roller periphery to the tunnel wall.

Images