JP3843356B2 - Intermediate shaft through shield machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an intermediate shaft provided at an arbitrary intermediate point of an underground tunnel road excavated by a shield method or a propulsion method.
[0002]
[Prior art]
Conventionally, an intermediate shaft of a tunnel road excavated by the shield method or propulsion method has been built after the shield machine has passed. For this reason, a waiting process for waiting for the passage of the shield machine, which is performed by mirroring the arrival / starting part of the shaft that has been excavated before the shield machine arrives, filling the open face with foamed mortar, etc. It was carried out by the frame completion process to build the frame of the intermediate shaft after the passage.
[0003]
For this reason, the ground around the shaft to be excavated was widely improved, the face for arrival and departure was sufficiently protected, and safety was ensured when the face was opened, and mirror cutting was performed.
[0004]
However, ground improvement of shafts, installation of liner plates, protection work for arrival / starting parts, mirror cutting of liner plates for arrivals / starting parts, filling of mortar in shafts, arrival / starting of shield machines, segments in shafts after passing There was a problem of occupying the ground area for construction during the entire process of dismantling and erection of the shaft. For this reason, a construction method that is safe and can shorten the construction period has been demanded.
[0005]
[Problems to be solved by the invention]
This invention is made | formed in view of the above-mentioned problem, and makes it a subject to provide the shield machine passage intermediate shaft of the structure which can let a shield machine pass after constructing an intermediate shaft . Moreover, it aims at making the face opening process accompanying mirror cutting unnecessary by electric corrosion of shaft retaining steel material.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the shield machine passing intermediate shaft of the present invention is an intermediate shaft provided at any intermediate point of the underground tunnel road excavated by the shield method or propulsion method, before the shield machine passes The shield machine arrival entrance part where the vertical earth retaining steel material is electrolytically broken by anodic dissolution, and the shield machine passage part consisting of the shield machine start entrance part ,
The shield machine entrance entrance part and the shield machine start entrance part are hermetically sealed with a pressure lid so as to be able to be filled with an electrolyte solution , and are provided with an electrode plate made of a conductive material on the inner surface of the pressure lid. By applying voltage with the retaining steel material as the anode, the shaft retaining steel material can be electrolytically broken by anodic dissolution, and the shield machine can dig into the entire interior of the entrance or the depth of the shaft where the entrance is located. It is the structure filled with a filler .
[0007]
According to this invention, since most of the shaft shaft can be built before passing through the shield machine, the construction period can be shortened. In addition, since the shaft retaining steel material is subjected to electrolytic corrosion, a mirror cutting process with a risk of opening the face can be avoided.
[0008]
According to the present invention, it is possible to safely degrade the shaft retaining wall in advance in accordance with the arrival of the shield machine and enable the shield machine to dig.
[0009]
In addition, it is possible to safely exchange and inspect the cutter disk of the shield machine that has arrived at the arrival entrance of the intermediate shaft. Moreover, when the inspection of the cutter disk or the like is unnecessary, the construction period can be shortened by passing the cutter disk.
[0010]
Moreover, it is an intermediate shaft provided at any intermediate point on the underground tunnel that is excavated by the shield method or propulsion method, and the shaft retaining steel material is eroded by anodic dissolution before passing the shield device. It has a shield machine passage part consisting of an arrival entrance part and a shield machine start entrance part ,
The shield machine arrival entrance is hermetically sealed with a pressure lid so as to be able to be filled with an electrolyte solution , and is provided with an electrode plate made of a conductive material on the inner surface of the pressure lid, the electrode plate serving as a cathode, and the shaft retaining steel material serving as an anode. The structure is such that the earth retaining steel material can be electrolytically broken by anodic dissolution by applying, and the interior of the entrance portion is filled with a filler capable of digging the shield machine,
On the other hand, the shield machine starting entrance portion is filled with an electrolyte solution in a space sealed by a shield machine front device dug into a shaft, and the shield machine front device is a cathode and the shaft earth retaining steel is an anode. the pit soil retaining steel with a anodic dissolution by electroerosion breakdown configurable by applying, entrance portion inside the shield machine is tunneling possible fillers, characterized in that a structure to be filled.
[0011]
According to the present invention, the steel retaining material can be subjected to electrolytic corrosion using the cutter disk body, which is the front device of the shield machine, as an electrode. For this reason, the expense which installs an electrode plate in a shield machine passage part can be reduced.
[0012]
In addition, the arrival / start entrance part includes an electrolyte solution and filler supply pipe and a recovery pipe, and circulates the electrolyte solution at the time of the electrolytic corrosion, collects the electrolytic solution when the electrolytic corrosion is completed, and fills the filler with the electrolytic corrosion. A medium supply device , a DC power supply device that applies a voltage between the electrode plate or shield machine front surface device and the shaft retaining steel material, and an galvanic corrosion monitoring device that monitors an applied current / voltage and electrical change. It is the structure which is equipped and controls an electric corrosion process according to the excavation schedule of a shield machine.
[0013]
According to the present invention, the electrolytic corrosion of the retaining steel material is promoted by circulation / recovery of the electrolytic solution serving as the electrolytic corrosion medium, and the waste liquid or gas containing hydroxide generated by the electrolytic corrosion is recovered in a short period of time. can do. In addition, the electric corrosion monitoring means can degrade the earth retaining steel material in accordance with the arrival time of the shield machine and enable the shield machine to dig.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
FIG. 1 is a schematic view showing a first embodiment of a passing intermediate shaft of the shield machine of the present invention, and (a) is a sectional view.
[0016]
FIG. 1A shows a shaft shaft 101 built on a shaft excavated while laying a shaft retaining steel material 10 from the ground 9. The shield machine passage intermediate shaft 100 according to the present invention includes a shield machine passage portion including an arrival entrance portion 104 and a start entrance portion 105 shown in the passage portion of the shield machine 1.
[0017]
In this embodiment, the arrival entrance portion 104 is an opening portion in which the portion through which the shield machine 1 of the shaft shaft 101 passes is opened in a cylindrical shape and the concrete is cast into the concrete, and the shaft earth retaining steel material 10 of the entrance portion is installed. It is exposed in the exposed state. The shaft retaining steel material 10 is a liner plate, a steel sheet pile, or other retaining steel material.
[0018]
Although not shown in the drawings, it is desirable that the shaft retaining steel material 10 at the depth serving as the entrance portion is constructed so as to be electrically insulated from the upper and lower retaining steel materials, reinforcing rods of the frame concrete, and the like.
[0019]
The arrival entrance 104 is sealed with a pressure lid 3 so that the electrolyte solution 2 does not leak, and the electrolyte solution 2 is supplied from the electrolytic corrosion medium supply device 30 installed on the ground 9 via the supply pipe 31 and filled. Is done. The arrival entrance section 104 is provided with a recovery pipe 32 for recovering the electrolyte solution 2 at the lower portion, and an electrolyte solution containing hydroxide by electrolytic corrosion is recovered by the circulation pump 30a. The electrolyte solution 2 is circulated by the supply pipe 31 and the collection pipe 32, and waste such as hydroxide due to electrolytic corrosion is collected.
[0020]
A cathode-side electric wire is connected to the electrode copper plate 3b (see FIG. 1 (c)) attached to the inside of the pressure lid 3 from a DC power source 20 installed on the ground 9 or inside the shaft, and is connected to the shaft retaining steel material 10 at the entrance. Connects the anode side electric wire 20b from the DC power source 20 and applies a voltage. By applying voltage, the shaft retaining steel material 10 serving as an anode is electrolytically eroded and deteriorated through the electrolyte solution 2, and the shield machine 1 can dig.
[0021]
FIG.1 (b) is a top view which shows the cross section of the AA part of (a). FIG. 1C shows the structure of the pressure lid 3. The pressure lid 3 has an electrode copper plate 3b attached to a disk-shaped plywood 3a, and includes a cathode terminal 3c at the end of the electrode copper plate 3b.
[0022]
In this embodiment, the shaft retaining wall 10 can be safely and beforehand degraded in advance in accordance with the arrival of the shield machine 1 so that the shield machine 1 can dig.
[0023]
In addition, the cutter disk of the shield machine 1 that has arrived at the arrival entrance 104 of the intermediate shaft can be safely exchanged and inspected.
[0024]
2A and 2B are schematic views showing a second embodiment of the passing intermediate shaft of the shield machine of the present invention, where FIG. 2A is a cross-sectional view, and FIG. 2B is a plan view showing the A-A cross section of FIG. is there.
[0025]
In this embodiment, the seal machine 1 arriving at the intermediate shaft 100 in the first embodiment travels through the shield machine passage guide 102 in the shaft and starts from the start entrance 105 to the outside of the shaft. It is the structure which comprises the electrolytic corrosion destruction method of the earth retaining steel material 10. FIG.
[0026]
The starting entrance part 105 shown in FIG. 2A is an opening part in which the part through which the shield machine 1 of the shaft body 101 passes is opened in a cylindrical shape and the concrete is placed, and the shaft retaining steel material 10 of the entrance part is provided. Is exposed in the laid state. In the figure, a state where the electric corrosion has occurred is shown.
[0027]
The starting entrance unit 105 is sealed by the entrance packing 105a so that the electrolyte solution 2 can be filled by the advanced insertion of the shield machine 1.
[0028]
The electrolytic solution 2 is supplied and filled from the electrolytic corrosion medium supply device 30 installed on the ground 9 via the supply pipe 31 to the starting entrance unit 105. A recovery pipe 32 that recovers the electrolyte solution 2 is provided below the start entrance portion 105. The electrolyte solution 2 is circulated by the supply pipe 31 and the collection pipe 32, and waste such as hydroxide due to electrolytic corrosion is collected.
[0029]
Next, a negative voltage is applied to the front device 1a (cutter disk) of the shield machine 1 from the DC power source 20 installed on the ground 9 or inside the shaft through the cathode-side electric wire 20a, and the shaft retaining steel material 10 at the entrance portion. In this case, a positive voltage is applied from the DC power source 20 through the anode side electric wire 20b. When the voltage is applied, the shaft retaining steel material 10 is electrolytically eroded and deteriorated through the electrolyte solution 2 so that the shield machine 1 can be excavated. FIG. 2 shows a state in which the shaft retaining steel material 10 has been subjected to electrolytic corrosion and deterioration.
[0030]
In this embodiment, it is not necessary to provide the pressure lid 3 because the shaft retaining steel material 10 is subjected to electrolytic corrosion using the cutter disk 1a of the shield machine 1 as an electrode.
[0031]
3A and 3B are schematic views showing a third embodiment of the passing intermediate shaft of the shield machine of the present invention, where FIG. 3A is a cross-sectional view, and FIG. 3B is a plan view showing the AA cross section of FIG. is there. Structures and configurations similar to those in FIG.
[0032]
This embodiment is an embodiment in which the shield machine 1 only needs to pass through the intermediate shaft 100, and the filler 6 such as foam mortar is formed in the shield machine passage portion connecting the arrival / start entrance parts 104 and 105. And the shield machine 1 is allowed to pass through.
[0033]
In this embodiment, the vertical earth retaining steel material 10 that is the outer wall of the arrival entrance portion 104 is subjected to electrolytic corrosion destruction in advance, and after the shield machine 1 is inserted, the vertical earth retaining steel material 10 constituting the outer wall of the start entrance portion 105 is electrolytic corrosion. It can be destroyed and a shield machine can be launched outside the shaft.
[0034]
Next, the process of the shield passing method of the shield machine passing intermediate shaft according to the present invention will be described with reference to FIG. 4, FIG. 5, and FIG.
[0035]
Drawing 4 is an explanatory view (the 1) of a process of a passing method of a shield of a shield machine passage middle shaft of the present invention.
First, 1. In the ground improvement process, the ground for laying the liner plate 10a is improved. 9a shows the ground improvement range.
[0036]
In this description, a description will be given in a form in which a liner plate 10 a is used as the shaft retaining steel material 10.
[0037]
Next, 2. In the liner laying step, the liner plate 10a is laid while excavating the shaft. The illustration shows a state where the liner plate is laid to the bottom of the shaft.
[0038]
Next, 3. In the shaft structure construction step, the shaft structure 101 is constructed by securing the arrival entrance portion 104 and the start entrance portion 105 at the shield machine passage portion.
[0039]
Next, 4. In the electrolytic corrosion preparation process, the pressure lid 3 is attached to the arrival entrance 104, the cathode-side electric wire 20a connected to the electrode copper plate 30b inside the pressure lid, the anode-side electric wire 20b connected to the liner plate 10a, and the entrance 104 Electrolytic corrosion facilities such as an electrolyte solution supply pipe 31 and a collection pipe 32 that are opened are arranged.
[0040]
FIG. 5 is an explanatory view (No. 2) of the process of the shield passing method of the shield machine passing intermediate shaft according to the present invention, showing the process following FIG.
[0041]
Next, in FIG. In the reaching portion electrolytic corrosion process, the electrolytic corrosion medium supply device 30 is provided on the ground, and the electrolyte solution is filled and circulated in the entrance portion 104 through the supply pipe 31 and the recovery pipe 32. Furthermore, the DC power supply device 20 is provided, and voltage is applied to the electrode copper plate 30b and the liner plate 10a of the pressure lid 3 to perform the electrolytic corrosion of the liner plate 10a.
[0042]
Next, 6. In the arrival part mortar filling process, after the electrolytic corrosion of the liner plate 10a is completed, the arrival material 104 is filled with the filler (mortar) 6 from the supply pipe 31, and the arrival of the shield machine is awaited.
[0043]
Next, 7. In the bit inspection / replacement process, after the shield machine 1 arrives, the cutter bit is inspected / replaced.
[0044]
Next, 8. In the start part electro-corrosion process, the shield machine 1 propelled in the shaft is inserted into the start entrance part 105, and the electrolyte solution 2 is filled and circulated in the sealed entrance part, and the front device 1a (cutter disk) of the shield machine 1 The cathode-side electric wire 20a is connected to the liner plate 10a, and the anode-side electric wire is connected to the liner plate 10a. In addition, the ground electric corrosion medium supply device 30 and the DC power supply device 20 are 5. This is the same as the reaching portion electrolytic corrosion process.
[0045]
FIG. 6 is an explanatory diagram (No. 3) of the process of the shield passing method of the shield machine passing intermediate shaft according to the present invention, showing the process following FIG.
[0046]
Next, 9. In the starting portion mortar filling step, after the electrolytic corrosion of the liner plate 10a of the starting entrance portion 105 is completed, the entrance portion is filled with the filler 6 (sand + mud material), and the shield machine 1 is prepared for starting.
[0047]
Next, 10. In the starting part initial excavation process, the shield machine 1 is started out of the shaft. The rear side of the shield machine 1 is propelled while a tunnel is formed by the shield segment 5 (propulsion pipe).
[0048]
Next, 11. In the excavation completion process, the tunnel formed by the shield segment passes through the shaft while the shield machine 1 has passed through the intermediate shaft 100.
[0049]
Next, 12. In the shaft shaft shaping / completion step, a part of the shield segment 5 in the intermediate shaft is removed and the shaft shaft shaping is performed to complete the intermediate shaft 100.
[0050]
Although not shown, an electrolytic corrosion monitoring device is connected to the cathode / anode side wires 20a and 20b from the DC power supply device 20 to monitor and control the current and voltage, thereby confirming the progress of the electrolytic corrosion process and controlling the progress. Can be performed.
[0051]
【The invention's effect】
The shield machine passing intermediate shaft of the present invention has the following effects.
[0055]
That is, according to this invention, since most of the shaft shaft can be built before passing through the shield machine, the construction period can be shortened. Further, it is possible to eliminate the mirror cutting process which involves the risk of the face being opened, and to safely degrade the shaft retaining wall and make it possible to dig with a shield machine.
[0056]
Still further, by using the cutter disk main body, which is the front device of the shield machine, as an electrode, and eroding the earth retaining steel, the cost for installing the electrode plate can be reduced.
[Brief description of the drawings]
1A and 1B are schematic views showing a first embodiment of a passing intermediate shaft of a shield machine according to the present invention, in which FIG. 1A is a sectional view, and FIG. 1B is a plan view showing an AA section of FIG. (C) is a figure which shows the structure of a pressure lid.
2A and 2B are schematic views showing a second embodiment of a passing intermediate shaft of the shield machine of the present invention, in which FIG. 2A is a cross-sectional view, and FIG. 2B is a plan view showing an AA cross section of FIG. is there.
FIGS. 3A and 3B are schematic views showing a third embodiment of the passing intermediate shaft of the shield machine of the present invention, where FIG. 3A is a cross-sectional view, and FIG. 3B is a plan view showing a cross section AA in FIG. is there.
FIG. 4 is an explanatory view (No. 1) of a process of a shield passing method of a shield machine passing intermediate shaft according to the present invention.
FIG. 5 is an explanatory diagram (No. 2) of the process of the shield passing method of the shield machine passing intermediate shaft according to the present invention.
FIG. 6 is an explanatory diagram (No. 3) of the steps of the shield passing method of the shield machine passing intermediate shaft of the present invention.
[Explanation of symbols]
1 Shield machine 1a Shield machine front device (cutter disc)
2 Electrolyte solution 3 Pressure lid 3a Plywood 3b Electrode copper plate 3c Cathode terminal 5 Shield segment 6 Filler 9 Ground 9a Ground improvement part 10 Shaft retaining steel material 10a Liner plate 20 DC power supply device 20a Cathode side electric wire 20b Anode side electric wire 30 Electrochemical medium Supply device 30a Circulation pump 31 Supply pipe 32 Recovery pipe 100 Intermediate shaft 101 Vertical shaft structure 104 Arrival entrance portion 105 Start entrance portion

Claims (3)

Shield machine arrival entrance , which is an intermediate shaft installed at any intermediate point on the underground tunnel road excavated by the shield method or propulsion method, where the shaft retaining steel material is eroded by anodic dissolution before the shield machine passes. And a shield machine passage part consisting of a shield machine start entrance part ,
The shield machine entrance entrance part and the shield machine start entrance part are hermetically sealed with a pressure lid so as to be able to be filled with an electrolyte solution , and are provided with an electrode plate made of a conductive material on the inner surface of the pressure lid. By applying voltage with the retaining steel material as the anode, the shaft retaining steel material can be electrolytically broken by anodic dissolution, and the shield machine can dig into the entire interior of the entrance or the depth of the shaft where the entrance is located. A shield machine passing intermediate shaft , characterized in that it is configured to be filled with a filler . Shield machine arrival entrance , which is an intermediate shaft installed at any intermediate point on the underground tunnel road excavated by the shield method or propulsion method, where the shaft retaining steel material is eroded by anodic dissolution before the shield machine passes. And a shield machine passage part consisting of a shield machine start entrance part ,
The shield machine arrival entrance is hermetically sealed with a pressure lid so as to be able to be filled with an electrolyte solution , and is provided with an electrode plate made of a conductive material on the inner surface of the pressure lid, the electrode plate serving as a cathode, and the shaft retaining steel material serving as an anode. The structure is such that the earth retaining steel material can be electrolytically broken by anodic dissolution by applying, and the interior of the entrance portion is filled with a filler capable of digging the shield machine,
On the other hand, the shield machine starting entrance portion is filled with an electrolyte solution in a space sealed by a shield machine front device dug into a shaft, and the shield machine front device is a cathode and the shaft earth retaining steel is an anode. The structure is such that the earth retaining steel material can be electrically eroded and destroyed by anodic dissolution by applying sapphire, and the interior of the entrance is filled with a filler that can be excavated by the shield machine. Intermediate shaft. The arrival and departure entrance portion is provided with a supply tube and the recovery tube of an electrolyte solution and a filler, wherein the conductive food during the electrolytic solution is circulated, the electrolytic solution recovered filled to electrolytic corrosion medium supplying filler during electroerosion completion A device , a DC power supply device that applies a voltage between the electrode plate or shield machine front surface device and the shaft retaining steel material, and an galvanic corrosion monitoring device that monitors the applied current / voltage and electrical change, 3. The shield machine passing intermediate shaft according to claim 1, wherein the electric corrosion process is controlled in accordance with the planned drilling of the shield machine.

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