JP4113010B2 - Support method and support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a support method using a support device that supports an excavator, a lining element, and the like at a construction site of a tunnel, for example.
[0002]
[Prior art]
As one of the construction methods for constructing a tunnel that intersects three-dimensionally below a railway or road, a tunnel construction method is known in which lining is performed using a large number of lining elements made of long rectangular tubes.
[0003]
In this tunnel construction method, as shown in FIGS. 10A and 10B, the excavator 111 is pulled by the traction machine 110 through the wire rope 115, and the covering element 112 is placed on the roadbed 102 below the track 101. The state of inserting (penetrating) is shown. Inside the lining element 112, piping 114 such as a drainage hose 113 for discharging excavated soil and a hydraulic hose for driving the square hole excavator 111, and wirings 114 are provided (Patent Document 1, reference).
[0004]
In the tunnel construction method described above, a support device that supports a lining element inserted into a natural ground following a square hole excavator that excavates the natural ground is used. The conventional support device can adjust the start angle and the like according to the excavation direction.
[0005]
[Patent Document 1]
JP-A-11-247579 [0006]
[Problems to be solved by the invention]
When constructing a tunnel with a circular cross section or a horseshoe-shaped cross section, it is necessary to change the support angle of the square hole excavator and the lining element on the support device in the rolling direction around the starting axis.
[0007]
However, since the conventional support device cannot change the support angle in the rolling direction, a plurality of mounting bases for supporting the square hole excavator and the lining element are prepared on the support device and installed every time the support angle changes. There is a problem that it is necessary to perform a work for exchanging the base, and this exchange work is troublesome and dangerous.
[0008]
The present invention has been made in view of the above problems, and an object thereof is to provide a support method and a support device for supporting a square hole excavator or a lining element that can be easily operated at a tunnel construction site. .
[0009]
[Means for Solving the Problems]
The first invention is applied to a square hole excavator for excavating a natural ground or a support method for supporting a lining element to be inserted into the natural ground subsequently.
[0010]
Using an element cradle that supports a square hole excavator or lining element by a pivoting frame that extends in a semicircular arc shape around the starting axis, and a rolling support mechanism that supports the element cradle so as to be rotatable around the starting axis By rotating the element cradle, the support angle of the square hole excavator or the lining element is changed in the rolling direction around the starting axis.
[0011]
The second invention is applied to a square hole excavator for excavating a natural ground or a support device for supporting a lining element to be inserted into the natural ground subsequently.
[0012]
An element cradle that supports a square hole excavator or a lining element by a pivoting frame that extends in a semicircular arc shape around the starting axis, and a rolling support mechanism that supports the element cradle so as to be rotatable around the starting axis. The support angle of the square hole excavator or the lining element is changed in the rolling direction by rotating the element cradle.
[0014]
According to a third invention, in the second invention, the rotating frame is divided into a plurality of arc-shaped members, and a frame connecting portion for detachably connecting the arc-shaped members is provided, and the connecting positions of the arc-shaped members are changed. It was set as the structure.
[0015]
In a fourth aspect based on the second aspect , an element receiving member that supports a square hole excavator or a lining element is detachably connected to the rotating frame, and the connecting position of the element receiving member with respect to the rotating frame is changed. It was set as the structure.
[0016]
Operation and effect of the invention
In the first and second inventions, by rotating the element cradle via the rolling support mechanism, the square hole excavator or the lining element is inclined in the rolling direction, and the support angle in the rolling direction can be easily and accurately determined. It can be changed, and the work of exchanging the mounting base on the support device as in the prior art becomes unnecessary, and the work at the tunnel construction site can be performed safely and easily.
[0017]
Then, by forming the rotating frame in a semicircular arc shape, the upper part of the element cradle can be opened, and a square hole excavator or lining element that is suspended via a crane or the like is placed on the element cradle. Carry-in work can be performed easily.
[0018]
In the third invention, the angular range in which the element cradle rotates can be expanded by changing the connecting position of the arcuate members.
[0019]
In the fourth invention, by changing the connecting position of the element receiving member with respect to the rotating frame, it is not necessary to divide the rotating frame into a plurality of arc-shaped members, and the structure can be simplified.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0021]
The support device 1 shown in FIGS. 1 to 3 is used in a tunnel construction method (see FIG. 10) in which lining is performed using a large number of lining elements. The hole excavator 10 and the lining element inserted into the natural ground following the square hole excavator 10 are supported as described later.
[0022]
The support device 1 includes an element cradle 53 that supports the square hole excavator 10 and a trapezoidal lining element, and adjusts the position and posture of the element cradle 53 corresponding to a tunnel having a circular cross section or a horseshoe-shaped tunnel. Have the ability to
[0023]
As shown in FIG. 6, when constructing a tunnel having a circular cross section, the support device 1 is installed on the work stage 90. By the operation of the work stage 90 and each support device 1, the position of the square hole excavator 10 is changed on the circumference along the tunnel, and the posture of the square hole excavator 10 is adjusted along the radial direction of the tunnel. Be changed.
[0024]
Hereinafter, the configuration of the support device 1 will be described. Here, it is assumed that two axes X and Y orthogonal to each other are set, the X axis extends in the digging direction of the square hole excavator 10, and the Y axis extends in a substantially horizontal lateral direction.
[0025]
The support device 1 includes a lift 22 that moves in a direction perpendicular to the base 21, a horizontal slide table 70 that moves in the Y-axis direction with respect to the lift 22, and an X-axis with respect to the horizontal slide table 70. A front / rear slide table 51 that moves in the direction, and a rolling support mechanism 55 that supports the element support 53 on the front / rear slide table 51 so as to be rotatable about the X axis (around the start axis).
[0026]
The base 21 of the support device 1 includes a slide roller 91, and the slide roller 91 moves in the Y-axis direction by rolling contact with the guide rail 2 installed on the work stage 90. The base 21 is fixed at an arbitrary position via the lever lock 3 and the stopper block 92.
[0027]
The lifting platform 22 is supported on the base 21 through a scissor link mechanism (lifter) 31 so as to be movable up and down. The scissor link mechanism 31 is expanded and contracted by being driven by two lift jacks (hydraulic cylinders) 23, and raises and lowers the lifting platform 22.
[0028]
Each lift jack 23 has a cylinder base end connected to each link 33 via a support shaft 24, and a rod tip connected to each link 32 via a support shaft 25. When each lift jack 23 is extended by the pressurized hydraulic oil supplied from the hydraulic unit, each link 32, 33 rises and the elevator 22 rises, while each lift jack 23 contracts, The links 32 and 33 are tilted and the lifting platform 22 is lowered.
[0029]
The scissor link mechanism 31 includes two pairs of links 32 and 33 that intersect with each other, a support shaft 34 that rotatably connects the intersections of the links 32 and 33, and one end of each link 32 and 33 that moves up and down with the base 21. Support shafts 35 and 36 that are rotatably connected to the base 22, and rollers 37 and 38 that cause the other ends of the links 32 and 33 to rotationally contact the lifting base 22 and the base 21. When each lift jack 23 is extended and contracted, the crossing angle of each link 32, 33 is changed to expand / contract, and the lifting platform 22 is translated relative to the base 21.
[0030]
The support device 1 includes a knuckle mechanism 40 that changes an inclination angle of the lifting platform 22 with respect to the scissor link mechanism 31. The knuckle mechanism 40 includes a pair of knuckles 41 that are swingably connected to each link 32 via a support shaft 43, and a pitching jack (hydraulic cylinder) 42 that swings each knuckle 41. The rotating shaft 44 of each roller 37 is coupled to the swinging tip of the roller 37.
[0031]
Each pitching jack 42 has a cylinder base end connected to each link 32 side via a support shaft 45, and a rod tip end connected to each knuckle 41 side via a support shaft 46. When each pitching jack 42 is extended by the pressurized hydraulic fluid supplied from the hydraulic unit, each knuckle 41 rises, the rotary shaft 44 of each roller 37 is raised, and the lifting platform 22 becomes horizontal. On the other hand, when each pitching jack 42 is contracted, each knuckle 41 tilts, and the rotary shaft 44 of each roller 37 is lowered to tilt the lifting platform 22.
[0032]
Since the support device 1 has a structure in which the knuckle 41 is provided between each link 32 and each roller 37, the support device 1 moves up and down an inclined jack mechanism that lifts and lowers one end of the element receiving base 53 to change the inclination angle of the element receiving base 53. There is no need to provide it on the table 22, and the overall height can be suppressed, and the increase in weight is suppressed, and handling at the construction site of the tunnel becomes easy.
[0033]
The horizontal slide table 70 is supported so as to be movable in the Y-axis direction via a guide rail 71 with respect to the lifting platform 22, and is driven by a pair of horizontal slide jacks (hydraulic cylinders) 72.
[0034]
The front / rear slide table 51 is supported by the horizontal slide table 70 so as to be movable in the X-axis direction via a guide rail 73, and is driven by an axial slide jack (hydraulic cylinder) 74.
[0035]
The element pedestal 53 includes four pairs of rotating frames 57 extending in a semicircular arc shape around the X axis, a beam 58 connecting the rotating frames 57, and a side hole of the trapezoidal square hole excavator 10 or the lining element. Element receiving members 59 and 60 for supporting the. By forming the rotating frame 57 in a semicircular arc shape, the upper part of the element receiving base 53 can be opened, and the square hole excavator 10 or the lining element that is suspended via a crane (not shown) or the like is received by the element receiver. The carrying-in work on the stand 53 can be easily performed.
[0036]
In the present embodiment, each rotating frame 57 is divided into two arc-shaped members 57a and 57b, and includes a frame connecting portion 76 that detachably connects the arc-shaped members 57a and 57b. One arc-shaped member 57a is provided with an element receiving member 59 that supports the side of the square hole excavator 10 or the lining element, and the other arc-shaped member 57b is provided with the side of the square hole excavator 10 or the lining element. A supporting element receiving member 60 is provided. In FIG. 1, arc-shaped members 57a and 57b are formed symmetrically.
[0037]
In this case, as shown in (a), (b), (c), and (d) of FIG. 4, when the attitude of the square hole excavator 10 or the lining element changes beyond about 1/4 rotation, As indicated by the middle arrow, the arc-shaped member 57a is replaced together with the element receiving member 59. Actually, the arc-shaped members 57 a and 57 b are selectively replaced according to the rolling direction of the rotating frame 57.
[0038]
As another embodiment, as shown in FIG. 5, the element receiving base 53 may detachably connect the element receiving members 59 and 60 to the rotating frame 57.
[0039]
In this case, as shown in (a), (b), (c), and (d) of FIG. 5, if the attitude of the square hole excavator 10 or the lining element changes beyond about 1/4 rotation, As indicated by the middle arrow, the element receiving members 59 and 60 are respectively replaced with respect to the rotating frame 57. Thereby, it is not necessary to divide the rotating frame 57 into two arc-shaped members, and the structure can be simplified.
[0040]
The rolling support mechanism 55 includes a plurality of guide rings 61 that extend in an arc shape around the X axis, and a plurality of rollers 62 that are in rolling contact with the rotating frame 57 are connected to each guide ring 61. The element cradle 53 is supported via each roller 62 so as to be rotatable in the rolling direction.
[0041]
As shown in FIG. 1, a pair of speed reducer-equipped hydraulic motors 56 that rotationally drive the element cradle 53 in the rolling direction are provided at the front and rear. The rotation of each hydraulic motor 56 is transmitted to the rotating frame 57 via a rack that meshes with a pinion (not shown). Each hydraulic motor 56 is configured to rotate in synchronization with each other.
[0042]
Constructed as described above, the support device 1 holds the square hole excavator 10 or the lining element at an arbitrary position and posture according to the construction position of the lining element inserted into the natural ground.
[0043]
The support device 1 swings the knuckle 41 and moves the rotating shaft 44 of each roller 37 up and down to incline the lifting platform 22 in the pitching direction and hold the element receiving platform 53 at an arbitrary pitching angle.
[0044]
The support device 1 tilts the element receiving base 53 in the rolling direction by rotating the element receiving base 53 via the rolling support mechanism 55, and holds the element receiving base 53 at an arbitrary rolling angle.
[0045]
(A), (b), (c), and (d) of FIG. 7 show a state in which the element receiving base 53 is rotated at the position where the lifting / lowering base 22 is raised most, or (e), (f), (G), (h) shows a state where the element receiving base 53 is rotated at the position where the elevating base 22 is lowered.
[0046]
7A and 7E, the upper part of the semicircular arc-shaped element pedestal 53 is open, and the square hole excavator 10 or the lining element that is suspended via a crane (not shown) is used as the element. It is possible to easily carry-in work on the cradle 53.
[0047]
7 (b) and 7 (f), the element cradle 53 is rotated by 90 ° in the direction of the arrow to be placed on the element cradle 53 as shown in FIGS. 7 (d) and (h). The posture of the formed square hole excavator 10 changes by 90 °. Within this rotation range, as shown in FIGS. 7C and 7G, the rotation of the element cradle 53 is stopped at an arbitrary position, and the square hole excavator 10 placed on the element cradle 53 is placed. Can be adjusted.
[0048]
In this way, the support angle in the rolling direction can be easily and accurately changed, and there is no need to replace the mounting base on the support device as in the past, making the work at the tunnel construction site safe and easy. Yes.
[0049]
Moreover, as shown in FIG. 6, when constructing a tunnel with a circular cross section, when the excavation position moves below No13, the scissor link mechanism (lifter) 31 is removed and the position of the support device 1 is lowered. . Then, the work period can be shortened by operating the two support devices 1 and carrying out excavation work at two locations simultaneously.
[0050]
Next, another embodiment shown in FIGS. 8A and 8B and FIGS. 9A and 9B will be described. In addition, the same code | symbol is attached | subjected to the same structure part as the said embodiment.
[0051]
The lifting platform 22 is supported through four outriggers 95 so as to be movable up and down. Each outrigger 95 expands and contracts by being driven by a lift jack (hydraulic cylinder) 96, and raises and lowers the lifting platform 22. Between the front and rear outriggers 95, a set jack 94 that is manually expanded and contracted is provided.
[0052]
A main push block 99 is provided at the rear part of the lifting platform 22, and the square push excavator 10 and the trapezoidal cross-section lining element are pushed into the ground by the push block 99. The main pushing block 99 is supported on the lifting platform 22 through a main pushing frame 98 so as to be movable in the starting axis direction, and is driven by a plurality of pushing jacks 97. In the figure, reference numeral 81 denotes left and right scaffolds that are provided on the lifting platform 22 so as to be deployable.
[0053]
The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is a front view of a support device showing an embodiment of the present invention.
FIG. 2 is a side view of the support device.
FIG. 3 is a plan view of the support device.
FIG. 4 is an explanatory view showing the operation of the element cradle.
FIG. 5 is an explanatory view showing the operation of the element cradle.
FIG. 6 is an explanatory view showing the tunnel construction procedure.
FIG. 7 is an explanatory view showing the operation of the support device.
FIGS. 8A and 8B are a front view and a rear view of a support device showing another embodiment. FIGS.
FIG. 9 is a plan view and a side view of the support device.
FIG. 10 is a cross-sectional view showing a tunnel construction method in which lining is performed using a conventional lining element.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support apparatus 10 Square hole excavator 21 Base 22 Lifting base 23 Lift jack 31 Scissor link mechanism 40 Knuckle mechanism 41 Knuckle 42 Pitching jack 53 Element base 55 Rolling support mechanism 59, 60 Element receiving member 57 Rotating frame 76 Frame connection Part

Claims (4)

In a support method for supporting a square hole excavator for excavating a natural ground or a lining element inserted into the natural ground, a square hole excavator or a lining element is supported by a rotating frame extending in a semicircular arc shape around the starting axis. And a rolling support mechanism that supports the element cradle so as to be pivotable about the starting axis, and by rotating the element cradle, the support angle of the square hole excavator or the lining element is adjusted in the rolling direction. A support method , characterized by changing about. In a support device that supports a square hole excavator that excavates a natural ground or a lining element that is inserted into a natural ground, the square hole excavator or the lining element is supported by a rotating frame that extends in a semicircular arc around the starting axis. An element cradle and a rolling support mechanism for pivotally supporting the element cradle around the starting axis, and rotating the element cradle to change the support angle of the square hole excavator or the lining element in the rolling direction A support device characterized in that the configuration is changed. The rotating frame is divided into a plurality of arc-shaped members, and a frame connecting portion that detachably connects the arc-shaped members is provided, and the connecting position of the arc-shaped members can be changed. 3. The support device according to 2 . An element receiving member that supports the square hole excavator or the lining element is detachably connected to the rotating frame, and the connecting position of the element receiving member with respect to the rotating frame can be changed. The support device according to claim 2 .

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