JP4059732B2 - Entrance packing device and water stopping method in start shaft - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an entrance packing device and a water stopping method in a start shaft, and more particularly to an entrance packing device and a water stop method in a start shaft with respect to an excavator having a joint portion protruding from the outer surface.
[0002]
[Background Art and Problems to be Solved by the Invention]
Generally, in the propulsion method, the shield method, the pipe roof method, and the like, when the excavator is started from the start shaft, water is stopped by attaching an entrance packing device to the start shaft in the start shaft.
[0003]
In this entrance packing apparatus, the packing is installed in a single layer so as to follow the excavation of the excavator, and the flapper metal fitting prevents the packing from warping inward to the starting vertical shaft.
[0004]
However, in such an entrance packing device, for example, when trying to construct a tunnel connected to each other by using a tunnel machine or a tunnel outer shell element having a joint portion protruding on the outer surface, the protruding joint portion In addition, it is difficult to make the packing follow, and the joints are dug up and down or left and right, and there is no space to attach the flapper fittings, so water leakage is likely to occur, and the packing is warped, and the inside of the start shaft It will come out.
[0005]
An object of the present invention is to provide an entrance packing device capable of reliably stopping water when a tunnel is constructed using an excavator or a tunnel outer shell element having a joint portion protruding on the outer surface, and water stopping in a starting shaft. It is to provide a method.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the entrance packing apparatus of the present invention performs excavation using an excavator and a tunnel outer shell element in which a joint portion protrudes along the axial direction on the outer surface of the excavator main body, It is an entrance packing device that builds and engages the preceding tunnel outer shell and joints and constructs a tunnel sequentially at adjacent positions, and attaches to the starting pit in the starting shaft to stop water,
A first packing having a first hole substantially corresponding to an outer diameter of the excavator body and the joint portion, and attached to a wall surface side of the start shaft;
A second packing that is thinner than the first packing, has a second hole smaller than the first hole, and is attached to the inner side of the start shaft than the first packing; Have
During excavation by the excavator, a portion inside the first hole of the second packing is caused to enter the start well beyond the first hole, and the second packing is brought into the start well by water pressure. Further, it is possible to prevent the first packing from pushing back to the start shaft side.
[0007]
According to the present invention, as a result of excavation by the excavator, a portion inside the first hole of the second packing follows the excavator and enters the start well through the first hole. The second packing that has entered the wellhead is in a state in which the first hole of the first packing substantially corresponds to the outer diameters of the main body and the joint portion. Further, it is possible to prevent the first packing from pushing back to the start shaft side, and water can be reliably stopped.
[0008]
In particular, even if the second packing corresponding to the joint portion is strongly stretched and warps, the first packing has the first hole corresponding to the shape of the joint portion. It is possible to reliably prevent warping.
[0009]
In the present invention, the second packing can be formed integrally with the first packing in advance.
[0010]
By adopting such a configuration, the second packing is formed integrally with the first packing as compared to the case where the first packing and the second packing are provided separately and attached, Since the second packing is pulled by the progress of the excavator and the tunnel shell element, it is possible to prevent the attachment portion from being damaged.
[0011]
Further, in the present invention, the second packing is thicker than the second packing, and a packing having a hole larger than the second hole is integrally provided on the inner side of the start shaft. Can be.
[0012]
By adopting such a configuration, it is possible to prevent the packing having a hole larger than the second hole from being integrated with the second packing and pulling the second packing to damage the mounting portion. .
[0013]
In the present invention, the third packing is thinner than the first packing, has a third hole smaller than the first hole, and is attached to the wall surface side of the start shaft than the first packing. It is possible to have this packing.
[0014]
By setting it as such a structure, in addition to a 2nd packing, a more reliable water stop can be performed by making a 3rd packing follow an excavation machine and a tunnel outer shell element.
[0015]
In this case, a slit can be formed at the joint corresponding position in the second packing and the third packing.
[0016]
By adopting such a configuration, the joint part passes through the slit forming position, so that the joint part corresponding position of the second packing and the third packing is extended more than necessary and warps to the start shaft side. Can be prevented and water leakage can be prevented.
[0017]
In this case, the excavator has a portion not having the joint portion,
In a portion having a fourth hole smaller than the third hole of the third packing, attached to the wall surface side of the start shaft than the third packing, and having no joint portion of the excavator It can have the 4th packing which follows.
[0018]
By setting it as such a structure, even if it does not have the joint part of an excavation machine, it can follow water reliably by a 4th packing and can perform water stop.
[0019]
In the present invention, the excavator has a substantially rectangular cross section,
The first hole of the first packing may have a substantially rectangular shape corresponding to the outer diameter of the excavator.
[0020]
By adopting such a configuration, in the excavator having a substantially rectangular cross section, the portion corresponding to the excavator corner portion of the packing is greatly stretched and tends to warp to the start shaft side. By making the hole of 1 substantially rectangular according to the outer diameter of the excavator, the corner portion of the extended packing is prevented from warping back to the start shaft side, and a reliable water stop is performed. be able to.
[0021]
The water stopping method in the starting shaft of the present invention is to construct a preceding tunnel by performing excavation using an excavator and a tunnel outer shell element in which a joint portion protrudes along the axial direction on the outer surface of the excavator main body. When the tunnel outer shell and the joints are engaged with each other to construct the tunnel sequentially at adjacent positions, the water stop method in the start shaft that stops the start shaft in the start shaft,
A first packing substantially corresponding to the outer diameters of the excavator body and the joint, and a first packing disposed on the wall surface side of the starting shaft, and a thickness smaller than the first packing; A second packing having a second hole smaller than the first hole and disposed on the inner side of the start shaft than the first packing, and thinner than the first packing; A step of attaching an entrance packing device having a third hole smaller than the first hole and having a third packing disposed closer to the wall surface of the starting shaft than the first packing to the starting shaft When,
Installing the excavator at a start pit to which the entrance packing device is attached and starting excavation, and following the second and third packings along the shapes of the excavator main body and the joint portion; and
A step of injecting a water leakage prevention material around the excavation machine from inside the starting pit while being excavated by a predetermined distance by the excavation machine, and bringing the third packing into close contact with the excavation machine with the pressure of the water leakage prevention material; ,
It is characterized by including.
[0022]
According to the present invention, the second packing follows the digging direction from the first hole of the first packing along with the digging, and the first packing prevents the second packing from warping to the start shaft side. At the same time, the third packing also follows the shape of the excavator body and the joint, and the third packing is brought into close contact with the excavator by the pressure of the injected water leakage prevention material. It is possible to surely prevent water from turning back and reliably stop water.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0024]
FIGS. 1-8 is a figure which shows the entrance packing apparatus which concerns on one embodiment of this invention, and FIG.9 and FIG.10 is a figure which shows the construction state of the tunnel using the entrance packing apparatus.
[0025]
As shown in FIG. 9, the tunnel 10 has a substantially rectangular shape. A plurality of tunnels 10 are constructed adjacent to each other in the vertical direction and the horizontal direction, and the plurality of tunnels 10 have a substantially rectangular shape with a large cross section. As the outer shell, a large rectangular tunnel 12 is constructed by excavating the inner earth and sand surrounded by the outer shell.
[0026]
Further, as shown in FIG. 10, each tunnel 10 is constructed by, for example, a propulsion method using an excavator 14 and a tunnel outer shell element 16.
[0027]
The excavator 14 includes a cutter 20 at the tip of a substantially rectangular excavator body 18, a pair of male joints 22 project along the axial direction at one side corner on the rear of the outer surface, and the other corner The pair of female joint portions 24 are projected along the axial direction in the portion, and the front portion does not have the male and female joint portions 22, 24.
[0028]
The tunnel outer shell element 16 is formed in a substantially rectangular shape like the excavator main body 18, and the male joint portion 26 extends along the entire axial direction on the outer surface corresponding to the male joint portion 22 and the female joint portion 24 of the excavator main body 18. In addition, the female joint portion 28 is protruded.
[0029]
And after excavating using the excavator 14 and the tunnel outer shell element 16 and constructing the preceding tunnel 10, the female joint portion 28 of the outer shell element 16 of the preceding tunnel 10 and the male joint portion of the excavator main body 18. 22 and the male joint portion 22 of the tunnel outer shell element 16 that follows are engaged with each other so that tunnels are sequentially constructed at adjacent positions.
[0030]
At the time of excavation by the excavator 14, high-pressure mud is used to resist earth pressure.
[0031]
When performing this excavation, as shown in FIGS. 1-7, the entrance packing apparatus 34 is attached to the start opening 32 in the start shaft 30, and water stop is performed.
[0032]
The entrance packing device 34 includes an entrance case 36, first to fourth packings 38, 40, 42 and 44, and a packing presser plate 46.
[0033]
The entrance case 36 includes an attachment portion 48 and a packing storage portion 50, and the attachment portion 48 is attached to the core member 56 of the wall surface 54 of the start shaft 30 via the entrance case attachment fitting 52. .
[0034]
The entrance case mounting bracket 52 has a rectangular frame-shaped plate 58 and a plurality of bolts 60 protruding from the plate 58, and the plate 58 is fixed to the core member 56 by, for example, welding. Yes.
[0035]
As shown in FIG. 6, an attachment hole 62 is formed in the attachment portion 48 at a position corresponding to the bolt 60 outside the packing storage portion 50.
[0036]
The bolt 60 of the entrance case mounting bracket 52 is inserted into the mounting hole 62 of the mounting portion 48 and is tightened with the nut 66 with an elastic member such as a sponge 64 interposed between the mounting case 48 and the elastic member. Thus, it is fixed to the entrance case mounting bracket 52.
[0037]
The mounting portion 48 is provided with a hole 68 substantially corresponding to the shapes of the excavator body 18 and the male and female joint portions 22, 24, and a plurality of bolts 70 project around the hole 68 in the packing storage portion 50. A leakage prevention material injection bolt 72 with a through hole is provided at a predetermined position, and an injection pipe 74 is inserted into the leakage prevention material injection bolt 72.
[0038]
As shown in FIG. 2, the first packing 38 has a first hole 76 substantially corresponding to the outer diameters of the excavator main body 18 and the male and female joint portions 22 and 24, and the wall surface 54 of the start shaft 30. It can be attached to the side.
[0039]
The first packing 38 is made of rubber and has a thickness of 10 mm.
[0040]
Further, the first packing 38 is provided with a mounting hole 38 a at a position corresponding to the bolt 70 and the muddy water preventing material injection bolt 72.
[0041]
As shown in FIG. 3, the second packing 40 has a second hole 78 that is smaller than the first hole 76 of the first packing 38, and is inward of the start shaft 30 than the first packing 38. It can be attached to the side.
[0042]
The second packing 40 is thinner than the first packing 38, and has a thickness of 2 mm, for example.
[0043]
Further, the second hole 78 is formed in a square shape, not a shape corresponding to the shapes of the main body 18 and the male and female joint portions 22 and 24.
[0044]
Further, a packing 82 having a hole 80 larger than the second hole 78 is integrally provided in the second packing 40 on the inner side of the start shaft 30.
[0045]
The packing 82 is thicker than the second packing 40, and has a thickness of, for example, 5 mm.
[0046]
In the hole 80 of the packing 82, a recess 84 corresponding to the male and female joint portions 22, 24 is formed, and a slit 86 is formed at a position corresponding to the recess 84 of the second packing 40.
[0047]
The slit 86 is used to prevent the second packing 40 from being unnecessarily extended and warped toward the start shaft 30 when the male and female joint portions 22 and 24 pass through. It may be in a disconnected state or in a disconnected state.
[0048]
Further, the second packing 40 and the packing 82 are provided with mounting holes 40a at positions corresponding to the bolts 70 and the water leakage preventing material injection bolts 72.
[0049]
As shown in FIG. 4, the third packing 42 has a third hole 88 that is smaller than the first hole 76 of the first packing 38, and the wall surface of the start shaft 30 more than the first packing 38. It can be attached to the side.
[0050]
Similar to the second hole 78 of the second packing 40, the third hole 88 is formed in a square shape, and a Y-shaped slit 90 is formed at a position corresponding to the male and female joint portions 22, 24. Yes.
[0051]
Similarly to the slit 86, the slit 90 is used to prevent the third packing 42 from being unnecessarily extended and warping toward the start shaft 30 when the male and female joint portions 22 and 24 pass through. Thus, it may be completely disconnected or not disconnected.
[0052]
The third packing 42 is thinner than the first packing 38, for example, 3 mm, and is slightly thicker than the second packing 40.
[0053]
A mounting hole 42 a is formed in the third packing 42 at a position corresponding to the bolt 70 and the water leakage preventing material injection bolt 72.
[0054]
As shown in FIG. 5, the fourth packing 44 has a fourth hole 92 that is smaller than the third hole 88 of the third packing 42, and the wall surface of the start shaft 30 more than the third packing 42. It is attached to the side and follows the part which does not have the male and female joint parts 22 and 24 of the excavator body 18.
[0055]
Similar to the third packing 42, the fourth packing 44 is formed to a thickness of 3 mm, for example.
[0056]
The fourth packing 44 is provided with attachment holes 44a at positions corresponding to the bolts 70 and the muddy water prevention material injection bolts 72.
[0057]
As shown in FIG. 7, the packing retainer plate 46 has a hole 94 corresponding to the hole 68 of the entrance case 36, and is mounted around the hole 94 at a position corresponding to the bolt 70 and the water leakage preventing material injection bolt 72. A hole 46a is formed.
[0058]
And the 1st-4th packing 38-44 is inserted in the packing accommodating part 50 of the entrance case 36, Furthermore, the packing presser plate 46 is inserted from it, the nut 96 is attached to the volt | bolt 70, and a water leak prevention material An injection tube 74 is inserted into the injection bolt 72 and fixed with a cap nut 100.
[0059]
Further, on the exit side of the excavator 14, the exit side entrance packing device 102 is attached to the wall surface 106 of the reaching shaft 104 as shown in FIG.
[0060]
The outlet side entrance packing device 102 accommodates the third packing 42, the second packing 40, and the fifth packing 110 from the wall surface 106 side in the outlet side entrance case 108, and is fixed by the packing presser plate 46. It has become.
[0061]
The outlet side entrance case 108 is the same as the entrance case 36 except that the outlet side entrance case 108 is different from the entrance case 36 in that a bolt 70 is attached instead of the water leakage preventing material injection bolt 72 of the entrance case 36.
[0062]
The fifth packing 110 has the same configuration as the fourth packing 44, but is different from the fourth packing 44 only in that the thickness of the fifth packing 110 is set to 5 mm, for example. .
[0063]
Other configurations are the same as those of the entrance packing device 34, and the description thereof is omitted.
[0064]
Next, the water stop method in the starting shaft using the above-described entrance packing device 34 will be described.
[0065]
First, prior to the start of excavation by the excavator 14, the entrance packing device 34 is attached to the wall surface 54 of the start shaft 30.
[0066]
When attaching the entrance packing device 34, first, the entrance case mounting bracket 52 is welded to the core material 56 on the wall surface 5 of the start shaft 30.
[0067]
Next, the core material 56 of the wall surface 54 is melted along the inner edge of the plate 58 of the entrance case mounting bracket 52, and the start hole 32 is formed by breaking the mortar.
[0068]
Next, a sponge 64 is attached to the entrance case mounting bracket 52, and the entrance case 36 is overlaid thereon, and a nut is attached to the bolt 60 of the entrance case mounting bracket 52 protruding from the mounting hole 62 provided in the mounting portion 48 of the entrance case 36. 66 is attached to fix the entrance case 36 to the wall surface 54.
[0069]
In this state, the fourth packing 44, the third packing 42, the first packing 38, the second packing 40, and the packing pressing plate 46 are stored in the packing storage portion 50 of the entrance case 36 in this order from the wall surface 54 side. .
[0070]
Then, a nut 96 is attached to the bolt 70 of the entrance case 36 penetrating each of the attachment holes 38a, 40a, 42a, 44a, 46a, and an injection tube 98 is inserted into the water leakage preventing material injection molten bolt 72 to attach the cap nut 100. Thus, the first to fourth packings 38 to 44 are attached to the entrance case 36, and the attachment of the entrance packing device 34 is completed.
[0071]
Next, the excavator 14 is installed in the start opening 32 to which the entrance packing device 34 is attached, and cutting excavation is started.
[0072]
When the initial excavation is completed, high-concentration muddy water is injected into the shield chamber, and the excavation proceeds further against the earth pressure.
[0073]
In this case, the fourth packing 44 follows the outer surface of the excavator main body 18 and reliably leaks water at the front portion of the excavator main body 18 where the male and female joint portions 22 and 24 are not provided.
[0074]
Further, as the digging progresses, the second packing 40 follows the digging direction from the first hole of the first packing 38, and the first packing 38 prevents the second packing 40 from warping toward the start shaft 30 side. And reliable muddy water can be performed.
[0075]
Furthermore, since the second packing 40 and the third packing 42 are provided with slits 86 and 90, the second packing 40 and the second packing 40 are more than necessary when the male and female joint portions 22 and 24 pass through. 3 is prevented from being stretched and warped back to the start shaft 30 side, thereby preventing muddy water reliably.
[0076]
In a state where the digging is performed for a predetermined distance, the leakage preventing material is injected from the injection pipe 98 to the outer periphery of the excavating machine 14 using the leakage preventing material injection bolt 72 provided in the entrance case 36.
[0077]
In this case, the third packing 42 is brought into close contact with the excavator 14 with the pressure of the injected water leakage preventing material, thereby reliably preventing the third packing 42 from warping to the start shaft 30 side and ensuring the water stoppage. It can be performed.
[0078]
Then, after the preceding tunnel 10 is constructed in this way, the entrance packing device 34 is similarly attached to a position adjacent to the tunnel 10, and the male joint portion 26 provided in the tunnel outer shell element 16 of the preceding tunnel 10. Alternatively, the female joint portion 28 or the male joint portion 22 of the excavator main body 18 is engaged with the female joint portion 28 for excavation.
[0079]
Thus, if the adjacent tunnel 10 is constructed | assembled sequentially and the large cross-section tunnel 12 is formed, a tunnel can be constructed | assembled under a reliable water stop.
[0080]
The present invention is not limited to the embodiment described above, and can be modified into various forms within the scope of the gist of the present invention.
[0081]
For example, in the above embodiment, the construction of the tunnel using the propulsion method has been described. However, the present invention can be applied not only to the propulsion method but also to the shield method and the pipe roof work.
[0082]
Moreover, in the said embodiment, although the excavator of a rectangular cross section is used, it is not restricted to this example, For example, it can be used also for an excavator of a circular cross section.
[0083]
Furthermore, in the said embodiment, although the 1st-4th packing is used for the entrance packing apparatus, it is not limited to this example, You may make it use only the 1st and 2nd packing. Alternatively, first to third packings may be used.
[0084]
In addition, the second packing uses a thick packing integrally attached thereto, but is not limited to this example, and the second packing may be integrated with the first packing.
[Brief description of the drawings]
FIG. 1 is an exploded view of an entrance packing apparatus according to an embodiment of the present invention.
FIG. 2 is a front view of a first packing.
FIG. 3 is a front view of a second packing.
FIG. 4 is a front view of a third packing.
FIG. 5 is a front view of a fourth packing.
FIG. 6 is a front view of the entrance case.
FIG. 7 is a front view of a packing presser plate.
FIG. 8 is an exploded view of the outlet side entrance packing device.
FIG. 9 is a front view showing a state in which a large-section tunnel is constructed by a plurality of tunnels.
FIG. 10 is a perspective view showing a state in which a tunnel is constructed by an excavator adjacent to a preceding tunnel shell element.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Tunnel 14 Excavator 16 Tunnel outer shell element 18 Excavator main body 22, 26 Male joint part 24, 28 Female joint part 30 Start shaft 32 Start stop 34 Entrance packing device 36 Entrance case 38 First packing 40 Second packing 42 Third packing 44 Fourth packing 46 Packing plate 54 Wall surface 72 Leakage prevention material injection bolt 74 Injection pipe 76 First hole 78 Second hole 80 Hole 82 Packing 86 Slit 88 Third hole 90 Slit 92 4th hole

Claims (8)

Digging is performed using a tunneling machine and a tunnel outer shell element with a joint projecting along the axial direction on the outer surface of the tunneling machine body, a preceding tunnel is constructed, and the preceding tunnel shell and the joint are engaged with each other. When the tunnel is constructed sequentially at adjacent positions, it is an entrance packing device that attaches to the start pit in the start pit and stops water,
A first packing having a first hole substantially corresponding to an outer diameter of the excavator body and the joint portion, and attached to a wall surface side of the start shaft;
A second packing that is thinner than the first packing, has a second hole smaller than the first hole, and is attached to the inner side of the start shaft than the first packing; Have
During excavation by the excavator, a portion inside the first hole of the second packing is caused to enter the start well beyond the first hole, and the second packing is brought into the start well by water pressure. Further, the entrance packing device prevents the first packing from being pushed back to the start shaft side. In claim 1,
The entrance packing apparatus, wherein the second packing is formed integrally with the first packing in advance. In claim 1,
The second packing has a thickness larger than that of the second packing, and a packing having a hole larger than the second hole is integrally provided on the inner side of the start shaft. Entrance packing device. In any one of Claims 1-3,
The third packing is thinner than the first packing, has a third hole smaller than the first hole, and has a third packing attached to the wall surface side of the start shaft than the first packing. This is an entrance packing device. In claim 4,
An entrance packing device, wherein the second packing and the third packing are formed with slits at positions corresponding to the joint portions. In claim 5,
The excavator has a portion that does not have the joint portion;
In a portion having a fourth hole smaller than the third hole of the third packing, attached to the wall surface side of the start shaft than the third packing, and having no joint portion of the excavator An entrance packing device having a fourth packing to follow. In any one of Claims 1-6,
The excavator has a substantially rectangular cross section,
The entrance packing apparatus according to claim 1, wherein the first hole of the first packing has a substantially rectangular shape corresponding to the outer diameter of the excavator. Digging is performed using a tunneling machine and a tunnel outer shell element with a joint projecting along the axial direction on the outer surface of the tunneling machine body, a preceding tunnel is constructed, and the preceding tunnel shell and the joint are engaged with each other. When the tunnel is constructed sequentially at adjacent positions, the water stop method in the start shaft that stops the start shaft in the start shaft,
A first packing substantially corresponding to the outer diameters of the excavator body and the joint, and a first packing disposed on the wall surface side of the starting shaft, and a thickness smaller than the first packing; A second packing having a second hole smaller than the first hole and disposed on the inner side of the start shaft than the first packing, and thinner than the first packing; A step of attaching an entrance packing device having a third hole smaller than the first hole and having a third packing disposed closer to the wall surface of the starting shaft than the first packing to the starting shaft When,
Installing the excavator at a start pit to which the entrance packing device is attached and starting excavation, and following the second and third packings along the shapes of the excavator main body and the joint portion; and
A step of injecting a water leakage prevention material around the excavation machine from inside the starting pit while being excavated by a predetermined distance by the excavation machine, and bringing the third packing into close contact with the excavation machine with the pressure of the water leakage prevention material; ,
A water stopping method in a starting shaft, characterized by comprising:

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