JP4753272B2 - Tunnel construction machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tunnel used for excavating a tunnel for a relatively wide railway or subway station building, etc., which has been pre-lined outside the planned excavation section in order to prevent surface subsidence in tunnel excavation with a shallow earth covering. Concerning construction machines.
[0002]
[Prior art]
Conventionally, Japanese Patent Publication No. 04-63198 discloses an arch-shaped tunnel excavation method and an apparatus thereof in which adjacent arch-shaped support plates are constructed close to each other or joined together.
[0003]
In the arch-shaped tunnel excavation method, as shown in FIGS. 7, 8 and 9, an arc-shaped watermark groove excavation chain extending in the longitudinal direction of the tunnel and curved so that the intermediate portion is recessed outside the tunnel. The cutter 2 is moved along the outer periphery of the face of the tunnel to excavate an arch-shaped watermark groove 19 having an arc-shaped cross section, and the arch-shaped watermark groove 19 is filled with a curable material and cured to be arc-shaped. After forming the arch-shaped support plate 21 having a cross section, a portion surrounded by the arch-shaped support plate 21 is excavated, and thereafter the same process is repeated so that the rear portion is inside the front end portion of the arch-shaped support plate 21. The arch-shaped watermark groove 19 is formed so as to be close or continuous.
[0004]
In the construction method, the arch-shaped tunnel excavating device has a diameter similar to that of the tunnel cross section of the traveling device 24 driven by the traveling drive device 23 on the rail 22 installed on the tunnel construction machine installation surface 18. The arch frame 5 is fixed, and extends to the movable frame 26 that is moved along the arch frame 5 by the moving drive device 25 obliquely upward from the rear side of the tunnel toward the face. An arcuate guide member 3 that is curved so as to be recessed is fixed.
[0005]
Then, the moving frame 9 moved by the cutter advance / retreat drive device 8 along the arcuate guide member 3 extends in the longitudinal direction of the tunnel and has the same curvature as the arcuate guide member 3 and the intermediate portion is recessed outside the tunnel. A curable material injection pipe 27 for injecting a curable material into the arc-shaped watermark groove 19 excavated by the arc-shaped watermark groove excavating chain cutter 2 that is curved in a curved manner is supported by the moving frame 9.
[0006]
Further, a hose 28 for connecting and connecting with a concrete batcher plant is connected to the curable material injection pipe 27.
[0007]
In the construction method presented in the above publication, an arch frame having a diameter similar to that of a tunnel cross section is fixed to a tunnel construction machine installation surface located at the lower part of the tunnel cross section, and the arch frame 5 is used for excavation of an open groove. The chain cutter 2 is moved to excavate the arch-shaped watermark groove 19 having an arc-shaped cross section along the outer periphery of the face of the tunnel. The conventional tunnel shape is the center position of the arch frame 5, that is, the device The moving center is located above the tunnel construction machine installation surface 18, and the rear end of the arcuate guide member 3 is the tunnel construction machine installation surface 18, that is, the ground of the tunnel when excavated by the open chain groove excavation chain cutter 2. The arch frame 5 moved smoothly from end to end without any problem of hitting, and there was no problem.
[0008]
[Problems to be solved by the invention]
However, a tunnel having a flat cross-section having a large radius with respect to the height required in a recent road or railway tunnel as shown in FIG. 2, that is, the turning center 17 of the cutter traversing device 4 has a tunnel cross-section. If an arch-shaped watermark groove 19 having an appropriate depth is to be formed in a tunnel that is located below the tunnel construction machine installation surface 18 located at the lower part, the distance from the tunnel construction machine installation surface 18 is There is no problem in the vicinity of the top of the vacant arch frame 5, but when both sides of the arch frame 5 close to the tunnel construction machine installation surface 18 are to be excavated by the open channel digging chain cutter 2, FIG. Since the rear end 3c of the arcuate guide member 3 hits the tunnel construction machine installation surface 18 as shown by the solid line, the arcuate cross section of the arcuate cross section It is impossible to excavate the both end portions of the groove 19, there is a problem that.
[0009]
[Means for Solving the Problems]
The present invention has been made in order to solve the above-described problem, and includes an arcuate guide member that is provided with a chain cutter for excavating an open groove so as to be movable in the front-rear direction and that is curved so that an intermediate portion is recessed outside the tunnel. A cutter traversing device is provided so as to be movable along a single-core circular arch frame arranged to face the face, and the cutter traversing device is circulated while circulating the watermark groove excavating chain cutter. In the tunnel construction machine for excavating the arch-shaped watermark groove on the outer periphery of the face by moving along the arch frame, the arcuate guide member is pivotally mounted on the cutter traversing device. .
[0010]
That is, by mounting the arcuate guide member on the cutter traversing device so as to be pivotable, the arcuate guide member is swung along the tunnel cross section and positioned parallel to the tunnel construction machine installation surface (shown in FIG. 2). In the case of a tunnel having a flat cross-sectional shape having a large radius with respect to the height, the center of rotation of the cutter traversing device is located at the lower part of the tunnel cross-section, and the chain cutter for watermark groove excavation is the arch frame It is possible to excavate including both ends of the arcuate watermark groove having an arcuate cross section without the rear end of the arcuate guide member hitting the tunnel construction machine installation surface when positioned at both ends of the arcuate.
[0011]
Further, in the present invention, the chain guide for excavating the open groove is provided in the arcuate guide member so as to be able to turn in a direction perpendicular to the bending direction of the arcuate guide member, whereby the arcuate guide member is When the both ends of the arch frame are positioned parallel to the tunnel construction machine installation surface (position of arrow B shown in FIG. 2), the open-bottom excavation chain cutter can turn up and down, and the arcuate guide member It is possible to excavate the watermark groove below the position.
[0012]
Further, when the open-cut groove excavation chain cutter protrudes from the arcuate guide member, the arcuate guide member is provided in the cutter traversing device so as to be swingable along the radial direction of the tunnel cross section. When the open chain excavation chain cutter is positioned at both ends of the arch frame, the arcuate guide member is swung with respect to the cutter traverse device so as to match the radial axis of the original arch frame (FIG. 2). The position of the arrow A shown in FIG. 3), when the traverse along the arch frame is followed by the radius of the watermark groove formed by the deviation of the position of the turning center of the arcuate guide member and the position of the chain cutter for excavating the groove Eliminates concerns about turning impossible due to contact with chain cutter for excavation of watermark groove resulting from deviation of radius from arch-shaped watermark groove formed on Rukoto can.
[0013]
Furthermore, by making the rear portion of the arcuate guide member extendable and retractable, the arcuate guide member turns from the horizontal position at both end portions of the arch frame and returns to a position that coincides with the radial axis A of the original arch frame. In the meantime, it is possible to excavate including both ends of the arc-shaped watermark groove having an arc-shaped cross section while avoiding the contact state of the rear portion of the arc-shaped guide member with the tunnel construction machine installation surface.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
1 to 6 show an example of a preferred embodiment of the present invention, and the basic configuration and construction method of the tunnel construction machine 1 are almost the same as those used in the conventional arched tunneling method. A cutter traversing device 4 provided with a circular groove excavating chain cutter 2 that is circulated and movably moved in the front-rear direction and having an arcuate guide member 3 that curves so that the intermediate portion is recessed outside the tunnel is provided. A turning center 17 disposed opposite to the tunnel construction machine is provided so as to be movable along an arcuate arch frame 5 located below the tunnel construction machine installation surface 18, and circulates through the open chain groove excavation chain cutter 2. Excavating an arch-shaped watermark groove 19 on the outer periphery of the face by moving along the arch frame 5 through the cutter traversing device 4 while moving A.
[0016]
A slewing bearing 6 is provided in front of the cutter traverse device 4, and a slewing frame 7 is interposed in the slewing bearing 6, and a slewing hydraulic cylinder is provided between the cutter traversing device 4 and the slewing frame 7. 32 is fixed in two places so as to be able to roll, and the revolving frame 7 can be swung with respect to the traversing device 4 about the rotation center 33 by extending and contracting the piston. The operation in which the arcuate guide member 3 provided to the slewing bearing 6 via the slewing frame 7 slews along the tunnel cross section is hereinafter referred to as slewing-1 operation.
[0017]
Further, between the revolving frame 7 and the arcuate guide member 3, a lifting hydraulic cylinder 29 including a cylindrical portion 29a and a piston 29b that slides and expands while sliding in the cylindrical portion 29a is rotatably mounted. The lower end of the cylindrical portion 29a is fixed to the front surface of the turning frame 7 so as to be rotatable, and the tip of the piston 29b is fixed to the upper portion of the arcuate guide member 3 so as to be rotatable. Thus, the arcuate guide member 3 swings about the rotation shaft 30 as a fulcrum.
[0018]
Further, the arcuate guide member 3 is composed of a front part 3a and a rear part 3b. The watermark groove excavation chain cutter 2 moves along the arcuate guide member 3, and the watermark groove excavation chain cutter 2 is temporarily moved forward. After being fixed at a predetermined position of the portion 3a, the rear portion 3b is folded to the front portion 3a side by the folding hydraulic cylinder 31.
[0019]
The watermark groove excavation chain cutter 2 is curved with the same curvature as that of the arcuate guide member 3 so that the intermediate portion is recessed outside the tunnel.
[0020]
Further, the watermark groove excavating chain cutter 2 is interposed between a moving frame 9 in which a pinion (not shown) and a rack (not shown) are engaged with each other by a cutter advancing / retreating drive device 8 on the arcuate guide member 3. A turning hydraulic cylinder 10 is interposed so as to be rotatable. The open hydraulic cylinder 10 causes the open groove excavation chain cutter 2 to swing up and down about the rotary shaft 11. Hereinafter, the up / down turning operation is referred to as the turning-2 operation.
[0021]
In the present embodiment, the cutter traversing device 4 provided with the arcuate guide member 3 so as to be able to advance and retreat the watermark groove excavating chain cutter 2 circulated by the drive device 32 is fixed to the traveling device 12 at both lower ends. A pinion 14 that meshes with a rack 13 provided along the inside of the arch frame 5 that is formed in an arc shape is connected to an output shaft of a moving drive device that includes a hydraulic motor 15 and a speed reducer 16. The arch-shaped openwork groove 19 is excavated on the outer periphery of the face by moving along the arch frame 5 and, as shown in FIG. 2, a flat cross section having a large radius with respect to the height. When digging a shaped tunnel, the turning center 17 of the cutter traversing device 4 is located below the tunnel construction machine installation surface 18, so that the tunnel construction machine installation surface 1 particularly at the start or end of excavation. When the both ends of the arch frame 5 that are close to each other are to be excavated by the open chain groove excavating chain cutter 2, the rear end 3c of the arcuate guide member 3 hits the tunnel construction machine installation surface 18 and starts excavation work. I can't.
[0022]
Accordingly, with the arcuate guide member 3 positioned at the extreme end of the arch frame 5, the swivel frame 7, the arcuate guide member 3 and the open-cut groove excavation chain cutter 2 are moved to a horizontal position (by the turn-1 operation). As shown by the broken line in FIG. 2, it is avoided that the rear end 3 c of the arcuate guide member 3 comes into contact with the tunnel construction machine installation surface 18.
[0023]
Next, the turning frame 7, the arcuate guide member 3, and the watermark groove excavation chain cutter 2 are set to a horizontal position (state shown by a broken line in FIG. 2) with respect to the tunnel construction machine installation surface 18 by the operation of the turning- 1. In this state, the watermark groove excavation chain cutter 2 is swung by the operation of the turn-2 and is lowered toward the ground (a state indicated by a chain line in FIG. 4). 3, excavation is performed while being pushed into the natural ground, and a watermark groove 20 is formed in a portion below the horizontal position of the arcuate guide member 3.
[0024]
Next, in the state where the rear part 3b of the arcuate guide member 3 is folded and contracted to the front part 3a side to prevent the rear end 3c of the arcuate guide member 3 from hitting the tunnel construction machine installation surface 18, the watermark groove The excavation chain cutter 2 is turned by the operation of the turn-2 and is directed upward from the ground, and the open-end groove cutting chain cutter 2 is returned to the horizontal position of the arcuate guide portion 3 (shown by a solid line in FIG. 4). Status).
[0025]
Then, by the operation of swirl-1, the arcuate guide member 3 is swung around the swivel frame 7 until the arcuate guide member 3 is aligned with the axis of the radius R1 while forming the watermark groove 20a as shown in FIG. Thereafter, the cutter traversing device 4 is moved to cut up the arch-shaped watermark groove 19.
[0026]
However, as shown in FIG. 3, along the arch frame 5 via the curvature radius of the turning radius R 2 of the watermark groove 20 a excavated and formed in the face by the operation of the turning- 1 and the cutter traversing device 4. The radius of curvature R1 of the arch-shaped watermark groove 19 excavated and formed on the outer periphery of the face is different by moving, and moreover, the watermark cutter digging chain cutter 2 is originally an arch-shaped watermark groove with a large construction amount. 19 is formed so that the resistance is reduced with respect to 19, so that the arc-shaped guide member 3 is made to coincide with the axis of the radius R1 of the arch frame 5 by the operation of the turning-1 and the arch-shaped watermark groove 19 is cut up. When shifting to the next process, there is a concern that the watermark groove excavation chain cutter 2 comes into contact with the watermark groove 20a and the operation of the turn-1 becomes difficult.
[0027]
Therefore, the arcuate guide member 3 is provided in the revolving frame 7 so as to be swingable along the radial direction of the tunnel cross section, and is positioned by a cooperative operation between the swing-1 operation and the swinging operation by the swing. It is possible to excavate continuously into the arch-shaped openwork groove 19 very smoothly upward while controlling. When the watermark groove excavating chain cutter 2 is transferred to the arch-shaped watermark groove 19 by the swing-1 operation and the swinging and lifting operation, the swing-1 operation and the swinging and lifting operation are performed. Thus, it is possible to shift to the arched watermark groove 19 surely and smoothly by obtaining and controlling the amount of operation in advance.
[0028]
Up to now, the start of excavation has been described in detail. However, the excavation of the arch-shaped watermark groove 19 is further continued, and the watermark groove excavation chain cutter 2 passes the apex of the arch frame 5 and the left-hand side. When the excavation at the end of the excavation is completed, the excavation can be performed in the same manner by the reverse procedure.
[0029]
Then, an instantaneously curable material is inserted into the arch-shaped watermark groove 19 from a hose (not shown) provided with a discharge port in the cutter portion of the watermark groove digging chain cutter 2 while digging the arch-shaped watermark groove 19. Thus, the arch-shaped support plate 21 is formed, the face portion surrounded by the arch-shaped support plate 21 is excavated, and the excavated earth and sand are discharged backward toward the face, and these steps are repeated. Excavate the tunnel.
[0030]
【The invention's effect】
As described above, the present invention does not provide a deep ground surface for installing a tunnel construction machine, such as tunnel excavation in a subway station building or the like that requires a pre-lining having a diameter that is wide with respect to the tunnel height. Even if the pivot center of the frame is located at the lower part of the tunnel cross section, both ends of the arc-shaped watermark groove with an arc-shaped cross section can be used without digging down the unnecessary installation surface of the tunnel construction machine as before. Can be excavated, the amount of excavated soil can be reduced, the excavation cost can be reduced, and an excellent tunnel construction machine that can greatly improve the construction efficiency can be provided.
[Brief description of the drawings]
FIG. 1 is a side view showing a preferred embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a cross section of an arch-shaped watermark groove, an arch-shaped support plate, and an arch frame of a tunnel according to an embodiment of the present invention.
FIG. 3 is a more detailed partial explanatory view of FIG. 2;
FIG. 4 is a sectional view showing an operation mechanism of swivel-2 according to the embodiment of the present invention.
FIG. 5 is a cross-sectional view showing an operation mechanism of swirl-1 according to the embodiment of the present invention.
FIG. 6 is a front view showing an operation mechanism of swirl-1 according to the embodiment of the present invention.
FIG. 7 is a side view of a conventional example.
FIG. 8 is a cross-sectional view showing a cross-sectional shape of a arch-shaped watermark groove, an arch-shaped support plate, and an arch frame of a tunnel in a conventional example.
FIG. 9 is a perspective view of a tunnel support composed of continuously formed arched support plates.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tunnel construction machine 2 Open chain groove excavation chain cutter 3 Arc-shaped guide member 3a Front part 3b Rear part 3c Rear end 4 Cutter traversing device 5 Arch frame 18 Tunnel construction machine installation surface 19 Arch-shaped watermark groove

Claims (4)

A cutter traversing device provided with a chain cutter for openwork excavation so as to be movable in the front-rear direction and having an arcuate guide member that is curved so that the intermediate portion is recessed outside the tunnel is an arc-shaped device arranged opposite to the face surface An arch-shaped watermark groove is excavated on the outer periphery of the face by being moved along the arch frame and moving along the arch frame via the cutter traversing device while circulating the chain cutter for excavating the watermark groove. In this tunnel construction machine, the arcuate guide member is turnably attached to the cutter traverse device. 2. The tunnel construction machine according to claim 1, wherein the chain cutter for excavating the open groove is provided on the arcuate guide member so as to be able to turn in a direction perpendicular to the bending direction of the arcuate guide member. 3. The cutter traversing device is provided with the arcuate groove excavating chain cutter so that the arcuate guide member can swing along the radial direction of the tunnel cross section when the open chain groove excavating chain cutter protrudes from the arcuate guide member. Tunnel construction machine described in 1. The tunnel construction machine according to claim 1, wherein at least a rear portion of the arcuate guide member is extendable.

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