Tunnel invert installation device and installation method

Abstract

To provide an erection device for a tunnel invert with excellent workability and an erection method.SOLUTION: In an erection device 21 for a tunnel invert for installing a precast slab 11 for the tunnel invert within a tunnel 1, a main body 22 having a traveling wheel 23, a beam member 51 which is provided on an upper part of the main body 22 and with its front side extending from the main body 22, and lifting and moving means 81 movably provided on the beam member 51 in a state where the precast slab 11 is suspended in the main body 22. The front side of the beam member 51 is aligned above an erection position of the precast slab 11, the precast slab 11 is lifted by the lifting and moving means 81 at a rear side of the main body 22, and the lifting and moving means 81 is moved to the front side of the beam member 51 and the precast slab 11 is lowered to the erection position in a state where the precast slab 11 is suspended. Thus, a plurality of precast slabs 11 can be lifted, moved, and lowered in succession.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a tunnel invert installation device and Erection It concerns the method.

[0002] Conventionally, as an erection device for this kind of tunnel invert, there is a heavy-weight erection device equipped with a hoisting arm that is provided on a self-propelled vehicle so as to be able to be raised and lowered (for example, Patent Document 1).

[0003] The above-mentioned conventional heavy-duty erection device makes it possible to change the vertical and horizontal orientation of the lifted tunnel invert, thereby improving the efficiency of tunnel invert installation work.

[0004] However, in order to position the heavy lift installation equipment in the lane under construction and receive the tunnel invert from the transport vehicle in the adjacent lane, it is necessary to close both the inbound and outbound lanes.

[0005] In response to this, there is a tunnel renovation device (for example, Patent Document 2) that has a lane device that suspends and lowers invert blocks attached to the upper part of the rear body of the device main body, which allows construction to be carried out without completely closing the road to traffic.

[0006] However, the above-mentioned tunnel repair device has an excavation jack that expands and contracts in the extension direction using the reaction force of the invert blocks that have already been laid, and repeats an excavation process in which the bottom of the tunnel is removed while retaining soil with the invert repair device placed at the location where the invert blocks are to be laid, and an invert block laying process in which the excavation jack is extended in response to the removal of the tunnel bottom, the invert repair device is advanced in the extension direction, and the excavation jack of the invert repair device that has advanced a predetermined length is retracted to lay the invert blocks.As the invert repair device is advanced in this manner using the excavation jack, there is a problem that the forward movement takes time and the device becomes large.

[0007] In addition, the main body of the invert repair device is equipped with a crane device that lifts the invert block, but after the crane lifts the invert block from the forklift, the invert repair device moves forward the distance of the invert block, and then the invert block is lowered into the vacant space, which creates the problem that it takes time from lifting the invert block to lowering it. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 10-184294 [Patent Document 2] JP 2020-117928 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0009] Therefore, the present invention is intended to solve the above problems and has an object to provide a tunnel invert installation device and installation method that are easy to work with. [Means for solving the problem]

[0010] The invention of claim 1 relates to a tunnel invert erection device for installing a precast slab for a tunnel invert in a tunnel, the device comprising: a main body having a traveling means; a beam member provided on an upper portion of the main body, one side of which in the front-rear direction extends from the main body; and a lifting and moving means provided so as to be movable on the beam member in a state in which the precast slab is suspended within the main body. The beam member is provided so as to be movable in the width direction of the main body. It is characterized by:

[0011] The invention of claim 2 is characterized in that the other side of the beam member in the front-rear direction protrudes from the main body.

[0012] Claim 3The invention is characterized in that the traveling means is traveling wheels, the traveling wheels are provided on the front, rear, left and right sides of the lower part of the main body, and a rotation drive means is provided for independently rotating the traveling wheels.

[0013] Claim 4 The invention is Installing precast slabs for the tunnel invert inside the tunnel Using tunnel invert installation equipment, The tunnel invert erection device includes a main body having a traveling means, a beam member provided on the upper part of the main body and extending from the main body on one side in the front-rear direction, and a lifting and moving means provided so as to be movable on the beam member while suspending the precast slab within the main body; The precast slab is lifted by the lifting and moving means on the other side of the beam member in the front-rear direction, and in this lifted state, the lifting and moving means is moved through the main body to one side of the beam member in the front-rear direction, and the precast slab is lowered at the erection position. the method further comprises the steps of: dividing the road surface of the tunnel into a plurality of sections in which a plurality of unit construction areas are arranged in the longitudinal direction of the tunnel; excavating the unit construction areas of each section to form boreholes for installing the plurality of precast slabs; suspending the plurality of precast slabs into the boreholes by the erection device; moving the erection device to another section and suspending the plurality of precast slabs into the boreholes of the other section; and forming the boreholes in the section by the time the erection device moves from the section to the other section and returns to the section. . Effect of the Invention

[0014] Claim 1 and 4 According to this configuration, one side of the beam member in the fore-to-aft direction is aligned above the installation position of the precast slab, the precast slab is lifted by the lifting and moving means at the rear of the main body, and with the precast slab hanging, the lifting and moving means is moved to one side of the beam member in the fore-to-aft direction, and the precast slab can be lowered to the installation position, thereby making it possible to lift, move and hang multiple precast slabs in succession.

[0015] According to the configuration of claim 2, the precast slab can be lifted by the lifting and moving means on the other front-to-rear direction side of the beam member protruding outward on the other front-to-rear direction side of the main body.

[0016] Also, Claim 1 According to the configuration of (a), the position of the precast slab body in the width direction can be adjusted when hanging it. Also, the beam members can be prevented from approaching the inner surface of the tunnel when the erection device is moved.

[0017] Claim 3 According to the configuration of (a), the traveling wheels are each rotated independently, so that the vehicle can turn even without a steering device.

[0018] Also, Claim 4According to this configuration, multiple precast panels can be lifted, moved, and lowered continuously.

[0019] moreover, Claim 4 According to this configuration, after the precast slab is hung in the excavation hole of the unit construction area, the erection device can be moved to hang the precast slab in the excavation hole of the unit construction area of ​​the other section without waiting for the excavation of the unit construction area of ​​the other section other than the section where the precast slab is hung, so that there is no waiting time due to excavation work and construction efficiency can be improved. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a cross-sectional view of an arch-shaped tunnel showing a first embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 13 is an exploded view of the gate frame of the erection device. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 13 is a side view of the lifting and moving means and the gate frame. [Figure 9] FIG. 11 is a perspective view of the operation of lifting the precast slab from the bed of the transport vehicle. [Figure 10] FIG. 11 is an oblique view showing the state in which the precast slab lifted by the lifting and moving means is transported through the main body. [Figure 11] FIG. 13 is a perspective view showing the precast slab suspended in the excavated hole. [Figure 12] FIG. [Figure 13] FIG. 1 is a plan view of the road surface showing sections and unit construction areas. [Figure 14]FIG. [Figure 15] FIG. 11 is a side view of an installation device showing a second embodiment of the present invention. [Figure 16] FIG. 11 is an explanatory plan view of a road surface illustrating a construction procedure according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiments described below do not limit the contents of the present invention described in the claims. Also, not all of the configurations described below are necessarily essential requirements of the present invention. EXAMPLES

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Figures 1 to 14 show an embodiment 1 of the present invention. Figure 1 shows a cross section of an existing arched tunnel 1, in which an arched structure 4 is formed by an arch-shaped mountain side wall body 2 and an inner wall body 3, and the mountain side wall body 2 and the inner wall body 3 are formed of cast-in-place concrete.

[0023] In addition, the left and right lower parts of the arch-shaped structure 4 are connected by an existing invert (not shown), which is made of cast-in-place concrete or precast slabs, and a road surface 5 is formed on top of the existing invert.

[0024] The existing road surface 5 of the existing arch tunnel 1 is excavated, and an invert 7 (FIG. 1) is provided in the excavated hole 6 in the road surface 5, and the lower part of the arch structure 4 is connected by the invert 7. The arch structure 4 is fixed to the natural ground 9 by a rock anchor 8, and the rock anchor 8 is driven into the natural ground 9. The invert 7 is formed of curved concrete invert precast slabs 11, 11 having a width approximately half that of the bottom of the tunnel 1. In this example, the precast slab 11 as the tunnel invert is formed by dividing the invert 7 into two in the tunnel width direction, connecting the divided parts 12 of the divided precast slabs 11, 11, and backfilling the excavation hole 6 with a backfill material 13 to form the new road surface 5.

[0025] In addition, Figure 1 and other figures show the state in which the road surface of the existing tunnel 1 has been excavated, new precast panels 11, 11 have been erected to form an invert 7, and the tunnel has been backfilled.

[0026] Furthermore, as shown in Figures 1 and 5, a support block 15 serving as a support member is placed on the bottom surface of the borehole 6, and the lower end of a height adjustment bolt 16 serving as a height adjustment means screwed into the precast slab 11 is abutted against the upper surface of this support block 15, so that the height of the precast slab 11 can be adjusted by the height adjustment bolt 16.

[0027] In addition, a plurality of backfilling material filling holes 17 are formed through the precast slab 11, and after a plurality of precast slabs 11, 11... are arranged in a row in the longitudinal direction of the tunnel, backfilling material 18 is filled between the precast slab 11 and the bottom surface of the excavation hole 6 through the backfilling material filling holes 17, and a fast-hardening grout material or the like is used as this backfilling material 18. In addition, the backfilling material 18 and joint material are also filled in the joints between the precast slabs 11, 11 adjacent in the longitudinal direction of the tunnel, and after filling with the backfilling material 18, etc., the excavation hole 6 can be backfilled.

[0028] The tunnel invert erection device 21 has running wheels 23, 23, 23, 23 serving as running means, mounted on the lower part of a main body 22, and the main body 22 has left and right base portions 24, 24 that are long in the front-to-rear direction and spaced apart on the left and right.The base portions 24 are made of long members such as H-shaped steel, and the running wheels 23, 23 are mounted on the front and rear outer sides of the left and right base portions 24, 24.

[0029] Furthermore, gate frames 26 are provided at the front and rear of the main body 22, and these gate frames 26 are integrally provided with left and right support pillars 27, 27 erected integrally on the left and right base parts 24, 24, left and right diagonal support pillars 28, 28 provided on the upper parts of the left and right support pillars 27, 27 and inclined toward the center in the left-right direction, and a horizontal beam part 29 connecting the upper parts of the left and right diagonal support pillars 28, 28. The left and right base parts 24, 24 are connected only by the front and rear gate frames 26, 26, and the main body 22 is configured to allow vehicles to pass inside.

[0030] 2 and 3, the base portion 24 is provided with a traveling motor 31 corresponding to each traveling wheel 23 as a rotation drive means for rotating the traveling wheel 23, and the rotation of the traveling motor 31 is transmitted to the traveling wheel 23 by a chain 32. In addition, a power source 33 which is a drive source of the traveling motor 31 and an operation panel 34 which is an operation unit of the traveling motor 31 are provided on the main body 22.

[0031] In this way, the four running wheels 23, 23, 23, 23 are independently driven, so that the erection device 21 can turn. In this example, as shown in FIG. 13 etc., the road surface 5 has left and right lanes 100L, 100R, and for example, to move forward from the left lane 100L to the right lane 100R, only the left front and rear running wheels 23, 23 are rotated for right turning, the erection device 21 faces diagonally to the right, and then all the running wheels 23, 23, 23, 23 are rotated to move straight diagonally to the right, and then only the right front and rear running wheels 23, 23 are rotated for left turning, so that the erection device 21 faces straight in the right lane 100R.

[0032] 2 and 3, outriggers 35 are provided on the left and right outer sides of the base parts 24, 24 at the front and rear end sides of the base parts 24, 24, and support legs 37 are raised and lowered by hydraulic cylinders 36 or the like serving as lifting means, and the four support legs 37, 37, 37, 37 are lowered to lift the running wheels 23 from the road, and the erection device 21 can be supported by the four support legs 37, 37, 37, 37. A manual hydraulic pump 38 for driving the outriggers 35 is mounted on the main body 22.

[0033] The upper parts of the support pillars 27, 27 of the front and rear gate frames 26, 26 are connected by a central connecting member 41 in the front-rear direction, and the diagonal support pillars 28, 28 of the front and rear gate frames 26, 26 are connected by upper connecting members 42 in the front-rear direction. Furthermore, at the front and rear of the main body 22, the lower parts of the support pillars 27 and the lower surfaces of the central connecting members 41 are connected by diagonal members 43.

[0034] In addition, the operation panel 34 is attached to the left-side support portion 27, which is one of the left and right sides of the rear gate frame 26, and a workbench 39 on which a worker operates the operation panel 34 stands is attached to the left-side support portion 27.

[0035] A beam member 51 is provided in the upper part of the main body 22, which is long in the front-to-rear direction and extends in the tunnel length direction. This beam member 51 is a truss structure including an upper chord member 52 made of an H-shaped steel, a lower chord member 53 made of an H-shaped steel, and a plurality of diagonal members 54 and vertical members 55 that connect the upper chord member 52 and the lower chord member 53. Furthermore, vertical members 56 having the same cross-sectional shape as the upper chord member 52 are provided at the front and rear ends of the upper chord member 52, and the upper chord member 52 and the lower chord member 53 are connected by these vertical members 56. The lower chord member 53 has flange portions 53F, 53F arranged above and below, and these flange portions 53F, 53F are connected by a web portion 53U.

[0036] The beam member 51 has a beam center portion 51S on the main body 22, a beam front extension portion 51M extending forward from the main body 22, and a beam rear extension portion 51U extending rearward from the main body 22. A lower chord extension portion 53E extending from the lower chord member 53 is provided on the beam front extension portion 51M. This lower chord extension portion 53E extends forward from the end position of the upper chord member 52.

[0037] As shown in Figures 4 and 5, the beam member 51 is slidably connected to the cross beam portion 29 of the portal frame 26 by a slide drive mechanism 61 that slides the beam member 51 in the left-right direction. The slide drive mechanism 61 includes a movable body 62 slidably attached to the cross beam portion 29, and the movable body 62 is fixed to the center of the height of the beam member 51. Specifically, as shown in Figure 5, the upper part of the movable body 62 is fixed to the lower surface of the upper chord member 52, and the lower part of the movable body 62 is fixed to the upper surface of the lower chord member 53, and further, one front-rear side surface of the movable body 62 is fixed to the vertical member 55 by a fixed beam 63 in the front-rear direction.

[0038] The movable body 62 is provided so as to be movable left and right by sandwiching the cross beam portion 29 from above and below between left and right upper rollers 65, 65 and left and right lower rollers 66, 66. A left and right rack 67 is provided on at least one of the front and rear surfaces of the cross beam portion 29, and a pinion 68 meshing with the rack 67 is provided on the movable body 62. The movable body 62 also includes a reducer 69 that rotates the pinion 68.

[0039] Therefore, by rotating the pinion 68, the moving body 62 moves in the length direction of the cross beam portion 29 on which the rack 67 is provided, and the beam member 51 to which the moving body 62 is fixed moves left and right (in the tunnel width direction).

[0040] Furthermore, the slide drive mechanism 61 drives the pinions 68, 68 of the front and rear moving bodies 62, 62 in a synchronized manner, and for this purpose, as shown in Figures 3, 6 and 12, a motor 71 with a reducer is provided as a prime mover at the center of the front and rear direction of the beam member 51, and front and rear rotating shafts 72, 72 rotated by this motor 71 are provided, and these front and rear rotating shafts 72, 72 are aligned in a straight line in the length direction of the beam member 51. In addition, the tips of the front and rear rotating shafts 72, 72 are connected to the reducers 69, 69 of the front and rear moving bodies 62, 62, and the front and rear rotating shafts 72, 72 rotate at the same rotation speed in the same direction due to the rotation of the motor 71, and this rotation is decelerated by the reducers 69, 69, and the front and rear pinions 68, 68 rotate at the same rotation speed, and the front and rear moving bodies 62, 62 slide left and right in a synchronized manner. This allows the long and heavy beam member 51 to move laterally in a stable manner.

[0041] Furthermore, since the front beam extension 51M and the rear beam extension 51U extend from the front and rear of the main body 22, the beam member 51 is moved to the left side (the center of the tunnel 1) before the right turn so that the tip of the rear beam extension 51U does not come close to the left side of the inner wall body 3 of the tunnel 1 during the right turn. Furthermore, when traveling straight ahead diagonally to the right, the beam member 51 is moved to the right side (the center of the tunnel 1) so that the tip of the front beam extension 51M does not come close to the right side of the inner wall body 3 of the tunnel 1, thereby preventing the tip of the beam member 51 from hitting the inner wall body 3.

[0042] 1 and other figures, the main body 22 of the erection device 21 has a width that fits within one lane of the tunnel 1, and an internal passage 73 through which vehicles can pass is formed inside the main body 22. Therefore, emergency vehicles and the like can pass through the internal passage 73 of the erection device 21.

[0043] A hoisting and moving means 81 is suspended from the beam member 51. As shown in Fig. 8, this hoisting and moving means 81 includes a chain block 82 serving as a lifting means, and a traveling means 83 that suspends this chain block 82 from the lower chord member 53. This traveling means 83 includes a running wheel 84 that engages with the upper surface of the lower flange portion 53F of the lower chord member 53, and a drive motor 85 that drives and rotates this running wheel 84.

[0044] As shown in FIG. 5, DH anchors 91, 91 serving as suspenders are attached to the left and right sides of the upper surface of the precast slab 11, and the DH anchors 91 have a large-diameter head 92 serving as a locking receiving portion.

[0045] A hook 94 is provided on the chain 93 that is wound and unwound by the chain block 82, and a hoisting jig 95 is detachably suspended from the hook 94. As shown in Fig. 8, the hoisting jig 95 has a shaft 96 for engaging the hook 94 at its center 95A, and has arms 95B, 95B facing diagonally upward on both sides of the center 95A. A string-like body 97 (Fig. 8) is suspended from the lower ends of the arms 95B, 95B, and a locking claw 98, which is a locking part that can be engaged with and detached from the head 92 of the DHA anchor 91, is connected to the string-like body 97. The upper end of the hook 94 is connected to the chain 93 by a horizontally rotating part 94A (Fig. 8) so as to be horizontally rotatable.

[0046] 2, a plurality of hoisting pulleys 87, 87... are provided midway along the power supply cable 86, and these hoisting pulleys 87, 87... are movably suspended from the flange portion 53F below the lower chord member 53. The traveling motor 31, outrigger 35, slide drive mechanism 61, and hoisting moving means 81 may be configured to be operable by the operation panel 34.

[0047] Therefore, as shown on the left side of Fig. 2, when the hoisting pulleys 87, 87... are brought close to each other, the power supply cable 86 is suspended between the adjacent hoisting pulleys 87, 87, the power supply cable 86 is bundled, and the lifting and moving means 81 is moved rearward from here, the power supply cable 86 extends in a straight line as shown by the dashed line. Note that, for the sake of explanation, two lifting and moving means are shown in Fig. 2 in addition to the lifting and moving means 81 given with the reference numeral 81, but in reality, only one lifting and moving means 81 is provided in the erection device 21 as shown in Fig. 3.

[0048] Next, a method for erecting the precast slab 11, which is a tunnel invert, using the erection device 21 will be described.

[0049] In the construction of an invert of an existing tunnel 1, if the road surface 5 is a two-lane road with a center line 100S in the center of the tunnel width direction, construction is performed while ensuring the passage of the lane 100R adjacent to the lane 100L to be constructed, and the lane 100L to be constructed first becomes the first construction area. That is, the road surface 5 of the tunnel 1 is divided into a plurality (two) of lanes 100L, 100R as construction areas in the width direction of the tunnel 1, and the lane 100L, which is one of the lanes 100L, 100R, is divided into a plurality of sections K1, K2, etc., in which a plurality of unit construction areas are lined up in the tunnel length direction, as shown in FIG. 13, and construction is performed first. Note that the lane 100R may be constructed first. In this example, a portion of the road surface 5 of the tunnel 1 in the length direction is divided into two sections K1, K2, but the entire length of the tunnel 1 may be divided into two.

[0050] For example, as shown in Fig. 13, a second section K2 in which the first to twentieth unit construction areas R201, R202, R203, ... R220 are arranged is partitioned next to a first section K1 in which the first to twentieth unit construction areas R101, R102, R103, ... R120 are arranged in the tunnel length direction. The last twentieth unit construction area R120 of the first section K1 is adjacent to the first unit construction area R201 of the second section K2 in the tunnel length direction. Furthermore, depending on the length of the tunnel 1, a third section K3, a fourth section K4, ... (not shown) are arranged in the tunnel length direction.

[0051] These sections and unit construction areas are represented by the m-th unit construction area R(n×100+m) of the n-th section Kn, where n and m are integers. It is preferable to provide at least a plurality (two) of sections K1 and K2 in one tunnel 1. For example, the 12th unit construction area of ​​the first section K1 has the symbol R(1×100+12), which is R112.

[0052] In addition, in this example, the length of the sections K1, K2, etc. is longer than the length of the erection device 21 and the transport vehicle 131 lined up side by side, which makes it possible to position the erection device 21 and the transport vehicle 131 between the first unit construction area R101 of the first section K1 and the first unit construction area R201 of the second section K2, or to move the transport vehicle 131 to the adjacent lane 100R.

[0053] The first unit construction area R101 of the first section K1 is excavated to form a borehole 6. The borehole 6 has a length and width that allows a predetermined number of four precast slabs 11 to be installed. Then, the erection device 21 travels and stops at a working position just before the borehole 6 in the first unit construction area R101, and the four outriggers 35 are lowered. The beam front extension 51M is located above the borehole 6. The working position of the erection device 21 is a position where the precast slab 11 can be suspended into the borehole 6 using the beam member 51.

[0054] The transport vehicle 131 carrying multiple precast panels 11 travels to the rear of the erection device 21 and is positioned in one of the construction areas, the lane 100L. The transport vehicle 131 faces backward. The traveling means 83 moves the chain block 82 to the beam rear extension 51U, and the chain block 82 is stopped at a position where the precast panels 11 on the loading platform 132 of the transport vehicle 131 can be lifted. In this state, the erection device 21 and the transport vehicle 131 are positioned in the lane 100L to be constructed, and passage on the adjacent lane 100L can be ensured. That is, as shown in FIG. 5 and the like, the erection device 21 has a width that fits within one lane 100L, and passage on the other lane 100R can be ensured.

[0055] As shown in Figures 1 and 5, the main body 22 has a size that allows the loading platform 132 carrying the precast slab 11 to be inserted, and a transport vehicle 131 can pass through the internal passage 73 of the main body 22.

[0056] Next, in order to lift the precast slab 11, the locking claw portion 98 is locked to the DHA anchor 91 of the precast slab 11 (Figure 9) on the loading platform 132, and the chain block 82 is driven to lift the precast slab 11 above the loading platform 132.

[0057] After this lifting, the transport vehicle 131 moves forward to the rear, and if the loading platform 132 is carrying a precast slab 11, it moves to a position where the lifted precast slab 11 is removed from the loading platform 132 and waits there, whereas if there is no precast slab 11 on the loading platform 132, it moves to the location where the precast slab 11 is located and loads a new precast slab 11 onto the loading platform 132.

[0058] When the transport vehicle 131 moves to the rear, the precast slab 11 that was lifted up corresponding to the height of the loading platform 132 is lowered below this and transported.

[0059] 10, the precast slab 11 is transported through the main body 22 and stops at the installation position at the beam front projection 51M. In this case, after being lifted, the precast slab 11 is suspended with its width direction (i.e., curvature direction) aligned with the length direction of the tunnel 1 until it passes through the main body 22.

[0060] After passing through the main body 22, the precast slab 11 is rotated by approximately 90 degrees in plan view by the horizontal rotating part 94A at the position of the beam front overhang part 51M to face the installation state. After this, the precast slab 11 is hoisted by the chain block 82 to the installation position at the bottom of the borehole 6 (FIG. 11), and when it is no longer necessary to hoist the chain block 82, the locking claw part 98 is released from the DH anchor 91.

[0061] In this way, the precast slabs 11 can be lifted from the loading platform 132 by the lifting and moving means 81 at the rear beam rear extension 51U, transported to the beam front extension 51M through the main body 22, and suspended therefrom, and transported directly to the top of the borehole 6. There is no need to move the erection device 21 during this transport, and the work of suspending (lowering) a plurality of precast slabs 11 into the borehole 6 can be performed efficiently. In this case, by providing the beam rear extension 51U in an extended position, there is no need to insert the loading platform 132 of the transport vehicle 131 into the main body 22, and the precast slabs 11 can be lifted from the loading platform 132 easily. edition 11 lifting operations can be easily performed.

[0062] This process is repeated until a predetermined number of four precast slabs 11 are suspended side by side in the longitudinal direction of the tunnel in one unit construction area, and when there is no longer a need to suspend other heavy objects, the support legs 37 are raised and the running wheels 23 are placed on the ground, allowing the erection device 21 to travel. The rear transport vehicle 131 also moves to another location so that the erection device 21 can move backwards. Note that the predetermined number of precast slabs 11 is not limited to four, and may be any number (two or more).

[0063] After the running wheels 23 are grounded, the rotation of the multiple running wheels 23, 23, 23, 23 is controlled as described above to rotate the erection device 21 so as to change direction, and the erection device 21 is moved backwards to the adjacent lane 100R, and is moved to a working position behind the first unit construction area R201 of the adjacent second section K2, and the support leg 37 is lowered at this working position.

[0064] After the hanging work of hanging down a plurality of precast panels 11 in the first unit construction area R101 of the first section K1, installation work such as adjusting the height of the precast panels 11 and connecting the precast panels 11, 11 to each other in the tunnel length direction is performed, and after this installation work, backfilling work is performed to fill the space between the underside of the precast panels 11 and the bottom of the excavation hole 6 with backfilling material 18, etc., and after this backfilling work, backfilling work is performed to backfill the excavation hole 6 with backfilling material 13 to form the road surface 5, and excavation work of the adjacent second unit construction area R102 is performed. The erection device 21 can be moved onto the unit construction area R backfilled in the second section K2.

[0065] Furthermore, the backfilling work does not require filling all of the multiple precast panels 11; only some may be backfilled, or a portion of some of the precast panels 11 may be left exposed so that they can be connected to the precast panels 11 of the adjacent second unit construction area R102.

[0066] After the suspension work, the erection device 21 can be moved to the next unit construction area. However, when heavy objects such as construction machinery for installation work, backfilling work, and backfilling work are transported using the lifting and moving means 81 and then suspended, the erection device 21 can be moved to the next unit construction area after the suspension work is completed.

[0067] The excavation work in the second unit construction area R102 is completed by the time the erection device 21 that moved to the second section K2 returns. It is also preferable that the installation work, backfilling work, and backfilling work are completed by the time the erection device 21 returns, but the installation work, backfilling work, and backfilling work may be performed for each of a plurality of unit construction ranges adjacent to each other in the tunnel length direction.

[0068] Before the erection device 21 moves to a working position in the first unit construction area R201 of the second section K2, which is the next construction area, the first unit construction area R201 of the second section K2 is excavated to form a borehole 6.

[0069] In the first unit construction area R201 of the second section K2, similarly to the first unit construction area R101, the precast slab 11 is lowered, and then the erection device 21 is moved to a working position behind the second unit construction area R102, which is the next unit construction area of ​​the first section K1. In the first unit construction area R101, the precast slab 11 is lowered, and then the erection device 21 is moved to a working position behind the second unit construction area R202, which is the next unit construction area of ​​the second section K2. In these cases, the erection device 21 starts moving to the working position of the adjacent section, which is the next unit construction area, and when the erection device 21 moves from the previous working position, the unit construction area next to the unit construction area where the precast slab 11 was lowered just before is excavated to form the excavation hole 6, and this is completed until the erection device 21 returns to the section.

[0070] The construction procedures for moving the erection device 21, lowering the precast slab 11, and excavating the borehole 6 will be described with reference to Figure 14. In Figure 14, the thick vertical line in the center indicates the passage of time from top to bottom. The right side of the thick line indicates the movement and position of the erection device 21 and the work of suspending the precast slab 11 by the erection device 21, and the left side of the thick line indicates the formation of the borehole 6.

[0071] As shown in FIG. 14, after the unit construction area R101 is excavated to form the borehole 6 (S1), the erection device 21 arrives at the work position of the unit construction area R101 (S2). That is, the borehole 6 is formed (S1) before arriving at the work position (S2). After the erection device 21 suspends the precast slab 11 into the borehole 6 of the unit construction area R101 (S3), the erection device 21 starts moving to the unit construction area R201 of the adjacent section K2 (S4), arrives at the work position of the unit construction area R201 (S6), and after the suspension work (S7), the erection device 21 starts moving to the unit construction area R102 of the adjacent section K1 (S4).

[0072] Furthermore, after the hanging work (S3) and before the erection device 21 starts moving (S4), installation work such as adjusting the height of the precast slabs 11 and connecting them to each other may be performed, or installation work and backfilling work may be performed, or installation work, backfilling work and backfilling work may be performed, and these are also applicable to the following processes.

[0073] Meanwhile, before the erection device 21 arrives at the work position of the first unit construction area R201 of the adjacent section K2 (S6), the unit construction area R201 is excavated to form the borehole 6 (S5).

[0074] The erection device 21 arrives at the work position in the unit construction area R201 (S6) and performs the lifting work (S7) in the borehole 6 in the unit construction area R201, after which the erection device 21 starts to move to the unit construction area R102 of the adjacent section K1 (S8) and arrives at the work position in the unit construction area R202 (S10).

[0075] Meanwhile, after the erection device 21, which was at the working position of the unit construction area R101, starts the movement (S4), i.e., after excavation of the unit construction area R102 becomes possible, but before the erection device 21 arrives at the working position of the unit construction area R102 (S10), the unit construction area R102 is excavated to form a borehole 6 (S9).

[0076] Similarly, after the suspension work (S11) in the borehole 6 of the unit construction area R102, the erection device 21 starts moving to the unit construction area R202 of the adjacent section K2 (S12) and arrives at the work position in the unit construction area R202 (S14).

[0077] On the other hand, after the movement is started (S8), and before the erection device 21 arrives at the work position of the unit construction area R202 (S14), the unit construction area R202 is excavated to form the borehole 6 (S12), and further, before the erection device 21 arrives at the work position of the unit construction area R103, the unit construction area R103 is excavated to form the borehole 6 (S15). By repeating these steps, all the unit construction areas R103 are excavated. construction Install precast panels 11 in the area.

[0078] In this way, when construction of one lane 100L is completed and backfilling is completed to allow traffic on one lane 100L, construction of the other lane 100R is carried out in a similar manner. In this case, since the erection device 21 has the beam front extension portion 51M and the beam rear extension portion 51U, there is no need to rotate the erection device 21 180 degrees, and the erection work can be carried out by reversing the front and rear.

[0079] In this manner, in this embodiment, corresponding to claim 1, the tunnel invert erection device 21 which installs a precast slab 11 for a tunnel invert inside a tunnel 1 comprises a main body 22 having running wheels 23 as running means, a beam member 51 in the longitudinal direction of the tunnel 1 which is provided on the upper part of the main body 22 and whose front side, which is one side in the fore-and-aft direction, protrudes from the main body 22, and a lifting and moving means 81 which is provided so as to be movable to the beam member 51 with the precast slab 11 suspended inside the main body 22. Therefore, the front side of the beam member 51 can be aligned above the erection position of the precast slab 11, the precast slab 11 can be lifted by the lifting and moving means 81 at the rear side of the main body 22, and with the precast slab 11 suspended, the lifting and moving means 81 can be moved to the front side of the beam member 51, and the precast slab 11 can be suspended to the erection position, so that a plurality of precast slabs 11 can be lifted, moved and suspended continuously.

[0080] In this embodiment, corresponding to claim 2, the rear side of the beam member 51 in the fore-and-aft direction protrudes from the main body 22, so that the precast panel 11 can be lifted by the lifting and moving means 81 at the rear side of the beam member 51 protruding outward from the rear side of the main body 22.

[0081] Also, In this embodiment, the claims 1 Correspondingly, the beam members 51 are provided so as to be movable in the width direction of the main body 22, so that the position of the precast slab 11 in the width direction of the main body 22 can be adjusted when suspending. In addition, the beam members 51 can be prevented from coming close to the inner surface of the tunnel when the erection device 21 is traveling.

[0082] In this embodiment, the claims3 Correspondingly, the running means is the running wheels 23, which are provided on the front, back, left and right sides of the lower part of the main body 22, and a motor 31 is provided as a rotation drive means for independently driving and rotating the running wheels 23. Therefore, by independently driving and rotating the running wheels 23, 23, 23, 23, the vehicle can turn even without a steering device.

[0083] In this embodiment, the claims 4 In response to A tunnel invert erection device 21 is used to install a precast slab 11 for a tunnel invert in a tunnel 1, the tunnel invert erection device 21 comprising: a main body 22 having running wheels 23 as running means; a beam member 51 in the longitudinal direction of the tunnel 1 provided on the upper part of the main body 22 and having a front side, which is one side in the front-rear direction, protruding from the main body 22; and a lifting and moving means 81 provided so as to be movable on the beam member 51 with the precast slab 11 suspended within the main body 22; The precast slab 11 is lifted by a lifting and moving means 81 at the rear side, which is the other side in the fore-and-aft direction of the beam member 51, and in this lifted state, the lifting and moving means 81 is moved through the main body 22 to the front side, which is one side in the fore-and-aft direction of the beam member 51, and the precast slab 11 is suspended at the installation position, so that a plurality of precast slabs 11 can be lifted, moved and suspended continuously.

[0084] In addition, In this embodiment, the claims 4 In response to this, the road surface 5 of the tunnel 1 is divided into a plurality of sections K1, K2 in which a plurality of unit construction areas R101, R102...R201, R202... are arranged in the tunnel length direction, the unit construction areas R101, R102...R201, R202... of the sections K1, K2 are excavated to form boreholes 6 in which a plurality of precast slabs 11 are installed, the erection device 21 lowers the plurality of precast slabs 11 into the borehole 6, and then the erection device 21 is moved to another section K2 to lower the plurality of precast slabs 11, 11...into the borehole 6 of the other section K2, and the erection device 21 moves from the sections K1, K2 to the other sections K2, K1, and forms the boreholes 6 in the sections K1, K2 by the time it returns to the sections K1, K2. Area After the precast slab 11 is hung in the excavation hole 6, the erection device 21 can be moved and the precast slab 11 can be hung in the excavation hole 6 of the unit construction area of ​​the other sections K2, K1 without waiting for the excavation of the unit construction area of ​​the other sections K2, K1 other than the sections K1, K2 from which the precast slab 11 is hung, thereby eliminating the waiting time due to excavation work and improving workability.

[0085] As an effect of the embodiment, any one of the lanes 100L, 100R, which are the multiple construction areas obtained by dividing the road surface 5 of the tunnel 1 in the width direction of the tunnel 1, is divided into multiple sections K1, K2 in which multiple unit construction areas are lined up in the tunnel length direction, the first unit construction area R101 of the first section K1 is excavated to form a borehole 6 in which multiple precast panels 11 are installed, and multiple installation devices 21 are installed in the borehole 6 at the work position of the first unit construction area R101 of the first section K1. After the precast panels 11 are lowered, the erection device 21 is moved to lower the precast panels 11 into the borehole 6 excavated in the first unit construction area R201 of the second section K2, the erection device 21 is moved to a working position of the second unit construction area R102 adjacent to the first unit construction area R101 of the first section K1, and before moving to this working position, the second unit construction area R102 of the first section K1 is excavated to form the borehole 6, and the second unit construction area R1 of the first section K1 is excavated to form the borehole 6. After the precast slab 11 is hung in the borehole 6 of the second section K2, the erection device 21 is moved to a working position in the second unit construction area R201 adjacent to the first unit construction area R201 of the second section K2, and before moving to this working position, the second unit construction area R202 of the second section K2 is excavated to form the borehole 6, the erection device 21 moves from the first section K1 to the second section K2, and before returning to the first section K1, the erection device 21 forms the borehole 6 in the first section K1, and the erection device 21 moves from the second section K2 to the first section K2, and before returning to the first section K1, the erection device 21 forms the borehole 6 in the second section K2. to the first section K1, and by the time it returns to the second section K2, a borehole 6 is formed in the second section K2. Therefore, after suspending the precast slab 11 into the borehole 6 of the unit construction area, the erection device 21 can be moved to suspend the precast slab 11 into the borehole 6 of the unit construction area of ​​the adjacent section without waiting for the excavation of the unit construction area of ​​the section adjacent to the unit construction area from which the precast slab 11 was suspended, and therefore there is no waiting time due to excavation work, improving workability.

[0086] In addition, the gate form frames 26 at the front and rear of the main body 22 have left and right diagonal support portions 28, 28 inclined toward the center in the left-right direction at the top of the left and right vertical support portions 27, 27, and the tops of the left and right diagonal support portions 28, 28 are connected by a cross beam portion 29 that is horizontal in the left-right direction. Therefore, compared to a gate form frame in which the support portions and cross beam portions are perpendicular to each other, the cross beam portion 29 is shorter and can stably support the heavy beam member 51. Furthermore, compared to a gate form frame in which the support portions and cross beam portions are perpendicular to each other and the corners of the support portions and cross beam portions are 90 degrees, the diagonal support portions 28 are not close to the inner wall body 3 of the tunnel 1, and the main body 22 can be positioned closer to the road shoulder. Furthermore, since the angle of the diagonal support portion 28 relative to the support portion 27 is not 45 degrees, but is greater than 25 degrees and less than 40 degrees, when the main body 22 is placed in the lanes 100L, 100R that divide the width of the tunnel 1, the diagonal support portion 28 is less likely to come close to the inner wall body 3 of the tunnel 1.

[0087] Moreover, since the beam member 51 has a truss structure with the diagonal member 54 provided between the upper chord member 52 and the lower chord member 53, the beam front extension portion 51M and the beam rear extension portion 51U have high strength as a cantilever beam, and the beam center portion 51S has high strength as a beam supported at both ends. Furthermore, the lower chord member 53 of the truss structure beam member 51 is made of H-shaped steel, and the lifting and moving means 81 is movably suspended from the lower flange portion 53F of the lower chord member 53, and a running means 83 is provided to suspend the lifting and moving means 81 from the lower chord member 53. Therefore, the lifting and moving means 81 can be efficiently attached to the beam member 51 by utilizing the beam member 51 with the truss structure, without the need to attach a separate dedicated rail or the like.

[0088] In addition, the slide drive mechanism 61, which slides the beam member 51 in the left-right direction, has movable bodies 62, 62 fixed to the beam member 51 and mounted on the cross beam portions 29, 29 of the front and rear gate frames 26, 26 so that they can move in the left-right direction, and the slide drive mechanisms 61, 61, which drive the front and rear movable bodies 62, 62 left and right, are equipped with front and rear rotating shafts 72, 72 rotated by a single prime mover, a motor 71, and the front and rear slide drive mechanisms 61, 61 are driven synchronously by these front and rear motors 71, 71, so that the long and heavy beam member 51 can be moved laterally in a stable manner.

[0089] In addition, when the lifting and moving means 81 suspends the precast slab 11, it moves to the positions of the vertical members 56, 56 at both ends in the forward / backward direction, and a lower chord extension portion 53E is provided on the lower chord 53 extending from the position of the vertical member 56. As shown in Figure 2, multiple lifting pulleys 87, 87... are provided in the middle of the power supply cable 86, and these lifting pulleys 87, 87... are suspended movably from the flange portion 53F below the lower chord 53. Therefore, as shown on the left side of Figure 2, the lifting pulleys 87, 87... are brought close to each other, the power supply cable 86 is suspended between adjacent lifting pulleys 87, 87, and the power supply cable 86 is bundled. When the lifting and moving means 81 is moved to the rear from here, the power supply cable 86 extends in a straight line as shown by the dotted line, and power can be supplied to the lifting and moving means 81 which moves along the beam member 51. EXAMPLES

[0090] Figure 15 shows a second embodiment of the present invention, in which the same parts as in the first embodiment are given the same symbols and their explanations are omitted. In this example, the beam member 51 of the erection device 21 does not have a rear beam extension 51U, and a counterweight 30, not present in the first embodiment, is provided on the left and right rear sides of the main body 22, between the front surface of the support portion 27, the underside of the central connecting member 41, and the upper surface of the diagonal member 43.

[0091] By providing the counterweight 30 on the rear side of the main body 22 in this manner, only the front side of the beam member 51 protrudes, as shown in Figure 15, and the stability of the erection device 21 can be ensured even if the precast slab 11 is suspended in front of that side.

[0092] When lifting the precast slab 11 from the platform 132 to the rear side of the beam member 51, a part of the platform 132 can be inserted into the main body 22 and the precast slab 11 on the platform 132 can be lifted at the beam center 51S, as shown in Fig. 1 etc. In a beam member 51 that does not have a beam rear extension 51U as in this example, the beam center 51S is the rear side, which is the other side of the beam member 51 in the fore-and-aft direction.

[0093] In this manner, the present embodiment corresponds to claims other than claim 2 and provides the same functions and effects as the above-mentioned first embodiment.

[0094] In addition, since the erection device 21 can be shortened by the length of the beam rear extension 51U, it is suitable for use at sites where there are restrictions in the tunnel length direction. Furthermore, as shown in Fig. 3, the beam center portion 51S and the beam rear extension 51U are detachably attached by means of bolts and nuts (not shown) or the like serving as connecting means, so that the length of the beam member 51 can be adjusted as necessary by attaching and detaching the beam rear extension 51U. In addition, since a loading platform 132 can be inserted into the main body 22, the precast slab 11 can be lifted from the loading platform 132 within the main body 22. EXAMPLES

[0095] FIG. 16 shows a third embodiment of the present invention. The same parts as those in the above-mentioned embodiments are given the same reference numerals, and their explanation will be omitted.

[0096] FIG. 16 is a plan view of the construction process. As shown in FIG. 16(A), the first unit of the first section K1 construction Excavation work will be carried out in area R101.

[0097] After the excavation of the unit construction area R101 (FIG. 16(A)), as shown in FIG. 16(B), the erection device 21 moves to the work position of the first unit construction area R101, and after the hanging work of hanging the precast slab 11 down into the excavation hole 6, installation work such as adjusting the height of the precast slab 11 and connecting the precast slabs 11, 11 in the tunnel length direction is performed, and after this installation work, backfilling work is performed to fill the space between the bottom surface of the precast slab 11 and the bottom surface of the excavation hole 6 with backfilling material 18 or the like. These hanging work, installation work, and backfilling work are the erection work of the precast slab 11, and the unit construction area after the erection work is hatched. Also, during the installation work of the first unit construction area R101, excavation work of the first unit construction area R201 of the second section K2 is performed.

[0098] After the erection work in the unit construction area R101 and after the excavation work in the unit construction area R201 (FIG. 16(B)), as shown in FIG. 16(C), the erection device 21 moves to the work position of the first unit construction area R201 in the second section K2 and performs the erection work of erecting the precast slab 11 in the excavation hole 6. Also, during the erection work in the unit construction area R201, backfilling work is performed in the first unit construction area R101 in the first section K1, and excavation work is performed in the second unit construction area R102. Note that the unit construction areas after backfilling are cross-hatched. Also, even if erection work is in progress in the unit construction area R201, if it is no longer necessary to use the lifting and moving means 81 for the erection work, after the excavation of the unit construction area R102, the erection device 21 may move to the work position (Fig. 16(D)) of the adjacent unit construction area R102, and the same applies to the process shown in Fig. 16(B) and each of the following processes. When it is no longer necessary to use the lifting and moving means 81 for the installation work, this occurs when there is nothing left to transport using the lifting and moving means 81 for the work, or when other heavy machinery is used.

[0099] After the erection work in the unit construction area R201 and after the excavation of the unit construction area R102, as shown in Figure 16 (D), the erection device 21 moves to the work position of the unit construction area R102 and performs the erection work of the precast panel 11 in the excavation hole 6, while simultaneously performing the backfilling work of the first unit construction area R201 of the second section K2 and the excavation work of the second unit construction area R202.

[0100] After the erection work in the unit construction area R102 and after the excavation work in the unit construction area R202, as shown in Fig. 16(E), the erection device 21 moves to the work position in the unit construction area R202 and performs installation work to install the precast slab 11 in the excavation hole 6. Also, during the erection work in the second unit construction area R202, backfilling work in the second unit construction area R102 of the first section K1 and excavation work in the third unit construction area R203 are performed.

[0101] These work steps are repeated to erect and backfill the precast panels 11 in all unit construction areas of sections K1 and K2.

[0102] In this manner, this embodiment provides the same functions and effects as the above-described embodiments.

[0103] Furthermore, as shown in Figures 16(D) and (E), construction work is carried out in one of the sections K1, K2, while backfilling work and excavation work are carried out in the other section K2, K1. Therefore, the workers performing the construction work can be separated from the workers performing the backfilling work and excavation work, allowing the work to be carried out efficiently.

[0104] The present invention is not limited to this embodiment, and various modifications are possible within the scope of the present invention. For example, the beam member is not limited to a truss structure, and various structures can be adopted. The slide drive mechanism is not limited to the embodiment, and various mechanisms can be used as long as they drive the beam member so as to move in the tunnel width direction. Furthermore, the construction area may be divided into three or more sections. The entire length of the tunnel may be divided into sections K1 and K2, or the entire length of the tunnel may be divided into a plurality of sections K1 and K2. [Explanation of symbols]

[0105] 1 Arched tunnel 5 Road surface 6. Borehole 7 Invert 11 Precast slab (tunnel invert) 21 Erection equipment 22 Main unit 23 Running wheels (running means) 51 Beam member 61 Slide drive mechanism 81 Lifting and transport means 100L lane (construction area) 100R lane (construction area) K1, K2 Sections (other sections) R101, R102, R103... Unit construction area R201, R202, R203... Unit construction area

Claims

1. In a tunnel invert erection device that installs a precast slab for a tunnel invert inside a tunnel, A main body having a traveling means; A beam member provided on an upper portion of the main body, one side of which in the front-rear direction extends from the main body; a lifting and moving means provided so as to be movable on the beam member while the precast panel is suspended within the main body, A tunnel invert installation device characterized in that the beam member is movable in the width direction of the main body.

2. 2. A tunnel invert installation device according to claim 1, wherein the other side of the beam member in the front-to-rear direction protrudes from the main body.

3. A tunnel invert erection device as described in claim 1 or 2, characterized in that the running means are running wheels, the running wheels are provided on the front, back, left and right sides of the lower part of the main body, and a rotational drive means is provided for independently rotating and driving the running wheels.

4. A tunnel invert erection device is used to install a precast slab for a tunnel invert inside a tunnel, The tunnel invert erection device comprises: A main body having a traveling means; A beam member provided on an upper portion of the main body, one side of which in the front-rear direction extends from the main body; a lifting and moving means provided so as to be movable on the beam member while the precast panel is suspended within the main body, The precast slab is lifted by the lifting and moving means on the other side of the beam member in the front-rear direction, and in this lifted state, the lifting and moving means is moved through the main body to one side of the beam member in the front-rear direction, and the precast slab is lowered to an installation position; Dividing the road surface of the tunnel into a plurality of sections in which a plurality of unit construction areas are arranged in the tunnel length direction; The unit construction area of ​​the section is excavated to form boreholes in which the plurality of precast panels are to be installed, and the plurality of precast panels are lowered into the boreholes by the erection device. Then, the erection device is moved to another section and the plurality of precast panels are lowered into the boreholes of the other section; A tunnel invert construction method, characterized in that the construction device moves from the section to another section and forms the borehole in the section before returning to the section.

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