JPS58106098A - Method and apparatus for converting diameter of underground pit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a method for converting the diameter of an underground tunnel and an apparatus therefor;
In particular, the present invention relates to a path diameter conversion method and apparatus suitable for underground tunnels in which high voltage cables are buried.

Generally, when burying high voltage cables, excavation work is carried out in underground tunnels, but when burying high voltage cables with a certain length (7 or less), connection work for these cables within the underground shaft is required separately. has been done.

Conventionally, in this type of connection work, the cable connection work site within the excavated underground tunnel must have a designated space 1- that is large enough to accommodate the connection machinery and equipment and perform the connection work. In order to secure this space, a vertical shaft is currently installed to connect the underground tunnel connection work site with the above-ground area. However, in recent years, new high-voltage cables have been buried above underground tunnels, such as subways and
Various facilities such as sewerage systems are often present, and it is often practically impossible to provide the above-mentioned vertical shaft in such locations.

Therefore, the present invention addresses the above-mentioned circumstances. It is considered as a type Ii, and there is no need to connect high-voltage cables to be buried in underground tunnels, and installation work for high-voltage cables can be carried out regardless of the presence or absence of various facilities such as subways. The purpose of this project is to provide a method for converting the diameter of underground tunnels and its equipment.

Hereinafter, an embodiment of the method for changing the path diameter of an underground tunnel and its device according to the present invention fl14 will be described based on the drawings.

First, to explain the construction method, 1 in Figure 1.
is an underground tunnel of a specified diameter in which a high-electronic cable is to be buried;
This is a book that involves drilling in advance using a drilling rig. This underground tunnel 1
@L, standing technique 2 and 6 are excavated with falling and rising position Kfft1% of high voltage cable, but this excavation K
Fi, the present applicant has already proposed [7] Excavating using an earth and sand transporting device that has a two-character shape on the side and a large number of packets are installed vertically on an endless chain (7), and can be added at any time as the excavation is carried out. As a result, the construction period and construction cost can be significantly reduced.After the excavation in steps 2 and 6, the underground tunnel 1 with a nine-way diameter is excavated using a predetermined excavating device.Next, the high voltage to be buried is The underground tunnel 1 at the coupling point of the couple is provided with a hole enlarged part 4.This hole enlarged part 4...
To excavate the hole, first, as shown in Fig.
After removing the segment by the connection part 7 of the segment removal device 6, earth and sand excavation and drilling is performed to expand the hole to a predetermined hole diameter while being propelled by the rotary blade 9 of the device 8. In this case, excavation is performed while the rotary blade 9 is gradually extended radially outward by the erector device 10. After the hole expansion drilling with the rotary blade 9 reaches a predetermined diameter, the fixed blade 12 of the hole expansion shield machine 11 advances the drilling with the rotary blade 9 at that diameter in order to obtain a space that can be stored closely on the excavation surface. 12, then the fixed blade 12 is moved to the head 1 in front of the device 8 for earth and sand excavation and segment installation.
Install it on 6. Next, the hydraulic jack 60 is operated to force the fixed blade 12 forward and perform drilling for a predetermined length to determine the circumference of the underground tunnel 1. Furthermore,
At least, a chemical solution or the like is injected into the soil surrounding the sloped part 14 at the base end of the excavation part 4 or both ends of the hole-expanding part 4 to solidify it to prevent samurai. The blade body of the rotary blade 9 is replaced with another attachment, and the segments 5 are sequentially attached to the circumferential surface of the enlarged hole portion 4 to provide lining.

Next, to explain the device, as shown in FIGS. 2 to 7, a segment removal device 6 and a device 8 for earth excavation and segment installation run on rails 15 laid in the underground tunnel 1. It's like K. A rotary blade 7 having a blade 7a at its tip is attached to the rear end side of the segment removal device 6tf truck 16 in the direction of propulsion via an erector device 17. This seven rotary blade carriage 16 is rotated by a hydraulic motor 18 attached to copper via a coupling mechanism 19 such as a gear. The erector device 17 expands and contracts the connecting portion 7 in the direction of its rotational diameter. When removing the segment 5, it expands to a position that matches the diameter of the underground tunnel 1, and in other cases, it expands and contracts the connecting portion 7. On the other hand, for earth and sand excavation and segment installation, a rotary blade 9 is attached to the tip side of the device 8Fi in the direction of propulsion of the truck 20 via an erector device 10.The tip of this rotary blade 9 is installed underground. The blade body for expanding and excavating a tunnel can be replaced at any time with the attachment in which the segment 5 is installed. In addition, the erector device 10 is configured to be able to expand and contract in the rotational radial direction at will.In the furnace, in front of this truck 20, there is a hole expanding hole that can be expanded and contracted in the forward direction. A shield machine 11 is fixedly installed.A suitable number of fixed blades 12 are detachably attached around the head 16 of this hole-expanding shield machine 11.When the fixed blades 12 are used to drill to the end of the hole-expanding section 4, The rotary blade 9 is removed from the head 16 and attached to the inner surface of the enlarged hole portion 4, leaving the portion t, to prevent it from getting on the road in the same way as the segment 5. In this case, the rotary blade 9 is not necessarily Instead of having to be rotated, it may be fixed to the trolley 20, and the expansion and contraction operations and movement of the platform 120 may be sufficient to perform hole drilling and segment attachment.

In the present invention, the safe 2o and the head 16 may be formed as one body, and when the rotary blade 9 is in operation, the fixed blade 12 and the fixed blade support part 13' are attached to the head 13. do not have. In addition, when a predetermined enlarged diameter is obtained, the 12 fixed blades are fired into the soil, and the segment removal device 6, earth excavation, and segment installation are carried out using a separate traction device in addition to hand pushing the 8 devices. It may be a propelled type or a self-propelled type. In the case of a self-propelled type, the removal of the segment 5 by the segment removal device 6, the earth and sand excavation, and the segment installation are performed at the same time as the drilling of the hole by the device and the inner leg of the segment 5. It is also possible to make it possible to do so.

As described above, according to the method and device for converting the diameter of an underground tunnel according to the present invention, a hole enlarged portion with a larger diameter is provided in a part of the underground tunnel located at a connection point for a high voltage cable, etc. to be buried. In this case, since the construction method is mainly based on the clamping method using a fixed blade, there is no need to set up the traditional standing technique, and the pressure can be carried out very easily.This greatly reduces construction time and construction costs. Since the hole expansion excavation is carried out by suppressing movement with jacks, the equipment can be simple and small, and it is possible to bury high voltage cables etc. regardless of the presence or absence of various facilities such as L7, etc. It has various effects.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an underground tunnel according to the present invention, FIG.
The figure is A-A @ cross-sectional view of Fig. 2, and Fig. 4 is B-B of Fig. 2.
5 is a sectional view taken along the line C-C in FIG. 2, FIG. 6 is a sectional view taken along the line D-D in FIG. 2, and FIG. 7 is a sectional view taken along the line E-B in FIG. 2. . 1... Underground tunnel 4... Hole expansion part 6.
... Segment removal device 7 ... Connection part 8 ... Segment attachment is done by device 9 ... Rotary blade 1o ... Erector device 11 ... ...Shield machine for hole expansion 26...Hollow jack for propulsion of shield machine Figure 3 4th cause procedural amendment (method) May 1930-! Mr. Commissioner of Japan Patent Office 1 Display of the case 411 Application No. 1989-20R89 2 Title of the invention Method and device for converting the diameter of underground tunnels 3 Relationship with the procedure case Patent applicant address Itabashi-ku, Tokyo Yamato-cho 14-15 8 Steel Building 4 Date of amendment order April 27, 1980 (Shipping date) 5 Subject of amendment (1) Application (2) Engraving of specification (no change in content) (3) Drawings (No change in content) Procedural amendment (voluntary) March 7, 1981 1, Indication of case Patent application 1982-20589? No. 2, Title of the invention Method for converting the diameter of an underground tunnel and its device 3, Relationship with the case of the person making the amendment Patent applicant name Name Shingyo Kiko Co., Ltd. 4 Agent residence Address 14-15 Yamato-cho, Itabashi-ku, Tokyo (1) Column for the title of the invention in the application and specification (2) Specification (3) Drawings (Fig. 2, Fig. 4, @Fig. 5 and Fig. 7) 6,
Details of the amendment Document 1, Title of the invention: Method for converting the diameter of an underground tunnel and its device 2, Claims (1) A predetermined portion of an underground tunnel of a certain diameter is made to the extent that a 1+f fixed blade can be accommodated. After drilling a hole to expand the hole, and then inserting a fixed blade into the hole, the fixed blade is moved forward with a hydraulic jack, and the hole is drilled to cover the circumference of the underground tunnel. A method for converting underground tunnel diameter costs, which is characterized by: (2) It has a trolley that can run freely on the rails laid in the underground tunnel, and a fixed blade is attached to the front end of the trolley, and this fixed blade can be inserted into a trolley that can be expanded and contracted in the direction of the rotational diameter for drilling holes. A path diameter conversion device for an underground tunnel, comprising a rotary blade and a hydraulic jack capable of moving a fixed blade forward under pressure to cover the circumference of the underground tunnel. 3. Detailed Description of the Invention The present invention relates to a method for converting the diameter of an underground tunnel and an apparatus therefor.
In particular, the present invention relates to a path diameter conversion method and apparatus suitable for underground tunnels in which high voltage cables are buried. Generally, when burying a high-voltage cable, excavation work is performed in a 1-1 underground tunnel, but when burying a high-voltage cable that has only a certain length, connection work for these cables within the underground tunnel is required separately. has been done. Conventionally, in this type of connection work, it was necessary to secure a predetermined space at the cable connection work site in the excavated underground tunnel to accommodate the connection machinery and equipment and to perform the connection work. In order to secure this space, the cable connection construction site inside the underground tunnel and the above ground section were connected.11. ′
The current situation is that vertical shafts have been installed to accommodate the needs of the people. However, above the underground tunnel where the new high-voltage cable will be buried,
Various facilities such as subways, water supply and sewage systems, and buildings are often present, and it is often practically impossible to provide the above-mentioned vertical shafts in such locations. Therefore, the present invention was made in view of the above circumstances, and it eliminates the need to provide a vertical shaft for connecting high voltage cables to be buried in underground tunnels, and allows high voltage cables to be connected regardless of the presence or absence of various facilities such as subways. The purpose of this invention is to provide a method for converting the diameter of an underground tunnel and its equipment, which can perform underground tunnel construction. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an underground tunnel diameter conversion method and apparatus according to the present invention will be described below with reference to the drawings. First, to explain the construction method, 1 in Figure 1.
is an underground tunnel with a specified diameter in which high-voltage cables are to be buried;
The excavation is done in advance using a drilling rig. This underground tunnel 1
When excavating a vertical shaft 2.6, a vertical shaft 2.6 is excavated in advance at the falling and rising positions of the high voltage cable. If excavation is carried out using an earth and sand transport device that is installed continuously vertically and can be added at any time as the excavation is performed, the construction period and construction cost can be significantly reduced. This shaft 2.6
After excavating, during this period, an underground tunnel 1 having a preset path diameter is excavated using a predetermined excavation device. Next, in the underground tunnel 1 at the connection point of the high voltage cable to be buried, a hole expansion part 4...
... will be established. In order to excavate this enlarged hole section 4, first, the segment 5 provided on the inner wall of the underground tunnel 1 at the excavation position of the enlarged hole section 4 as shown in FIGS. After removal by the rotary connection part 7 of the removal device 6, earth and sand excavation and segment installation are carried out while being propelled by the rotary blade 9 of the device 8 to expand the hole to a predetermined diameter. In this case, excavation is performed while gradually extending the rotary blade 9 radially outward using the erector device f110. After the hole expansion drilling by the rotary blade 9 reaches a predetermined diameter, a space is obtained in which the fixed blade 12 of the hole expansion shield machine 11 can be stored in close contact with the excavation surface.
Excavation by the rotary blade 9Vc is promoted 1-2 using that diameter, and then the fixed blade 12 is attached to the head 13 at the front of the device 8 for earth and sand excavation and segment attachment. Next, the hydraulic jack 60 is operated to push the fixed blade 12 forward and extend the hole by a predetermined length so as to cover the circumference of the underground tunnel 1. On the other hand, a chemical solution or the like is injected into the sloping part 14 at the excavation base end of the hole-expanding section 4 or around both ends of the hole-expanding section 4 to solidify it to prevent samurai. The blade body of the rotary blade 9 that has been removed is replaced with another attachment, and the segments 5 are sequentially attached to the inner surface of the hole enlarged portion 4 excavated by this attachment to provide lining. Next, to explain the installation, as shown in FIGS. 2 to 7, a segment removal device 6 and a device 8 for earth excavation and segment installation run on rails 15 laid in the underground tunnel 1. In the hollow segment removing device 6 configured as above, a rotary connecting portion 7 having a blade 7a at the tip is attached to the rear end side of the truck 16 via an erector device 17 in the direction of propulsion. This rotational connection part 7 is connected to a coupling mechanism 19 such as a gear by a hydraulic motor 18 installed on a trolley 16.
It rotates 17 times. Erecta device 17
is for expanding and contracting the rotational connection part 7 in the direction of its rotational diameter, and when removing the segment 5, it is expanded to a position corresponding to the diameter of the underground tunnel 1 in No. 7, and in other cases, it is to be reduced. It is the stutter that makes you move. On the other hand, earth and sand excavation and segment attachment are carried out using eight devices, and a rotary blade 9 is attached via an erector device 10 to the tip side of the truck 20 in the direction of propulsion. The tip of the rotary blade 9 can be replaced at any time with a blade for expanding and excavating an underground tunnel and an attachment for intersecting the segment 5. A coupling mechanism 22 such as a gear is connected by a hydraulic motor 21 installed on this rotating blade 9-carriage 20.
The erector device 10 allows the erector device 10 to freely expand and contract it in the radial direction of rotation. Furthermore, in front of this table *20, there is a hole-expanding shield machine 11.
be fixed. This hole-expanding shield machine 11 has an appropriate number of fixed blades 12 detachably attached to the periphery of a head 13. When this fixed blade 12#'i is excavated to the end of the expanded hole part 4,
It is removed from the head 1S and attached to the inner surface of the enlarged hole portion 4, leaving a portion t of it, in order to prevent samurai from getting it in the same way as the segment 5. In this case, 9 rotary blades, 1. It is not a book that has to be rotated, but it is fixed to the trolley 20, and only the expansion and contraction movement and movement of the trolley 20 can be done.
The holes may be drilled and the segments may be installed. In the present invention, the stand [120 and the head 16 may be formed as one body, and when the rotary blade 9 is in operation,
The fixed blade 12 and the fixed blade support part 13' are not attached to the head 16. Further, at the stage when a predetermined enlarged diameter is obtained, the 12 fixed blades are left in the ground. Note that the segment removal device 6, earth and sand excavation, and segment installation may be carried out manually by the device 8, or may be propelled by another traction device or self-propelled; in the case of a self-propelled type, the segment removal device The removal of the segment 5 by the device 6, the earth and sand excavation, and the segment attachment can also be performed simultaneously with the hole-expanding and the inner division of the segment 5 by the device 8. - As described above, according to the method and device for converting the diameter of an underground tunnel according to the present invention, when a hole with a larger diameter is provided in a high-voltage section to be buried, a construction method that mainly uses a fixed blade is used. Because of this, there is no need to install a vertical shaft like in the past, and it is extremely easy to carry out.This greatly reduces not only the construction period but also the construction cost.Also, the fixed blade is pressed forward with a hydraulic jack to expand the hole. The device is simple and small,
However, it has various other effects such as being able to bury high-voltage cables, etc., regardless of the presence or absence of various facilities such as tunnels and subways. 4. Brief explanation of the drawings Fig. 1 is a cross-sectional view of an underground tunnel according to the present invention, Fig. 2 is an explanatory diagram showing the method and excavation device for the hole-expanding section according to the present invention, Fig. 6
The figure is a sectional view taken along line A-A in Figure 2, and Figure 4 is a sectional view taken along line B-B in Figure 2.
Figure 5 is a cross-sectional view taken along line C-C in Figure 2, Figure 6 is a cross-sectional view taken along line D-D in Figure 2, and Figure 7 is a cross-sectional view taken along line E-B in Figure 2. Yes. 1... Underground tunnel 4... Hole expansion part 6.
... Segment removal device 7 ... Rotating connection part 8 ... Segment installation device 9 ...
...Rotary blade 1 Leaf---Erector device 11
......Hole expansion shield machine 30...Hydraulic jack Fig. 5 117

Claims (2)

[Claims] (1) First, a hole is drilled at a predetermined point in an underground tunnel of a certain diameter using a rotary blade to the extent that a fixed blade can be accommodated therein.Then, after the fixed blade is inserted into the excavated hole, a hydraulic jack is used. 1. To expand the hole by moving the fixed blade under pressure and cutting around the circumference of the underground tunnel. The path diameter of underground tunnels is characterized by the following: (2) It has a trolley that can freely run on rails laid in the underground tunnel, and the front end of the trolley is equipped with a fixed blade and a retractable rotary blade that can be fitted into the fixed blade to drill holes, and A path diameter conversion device for an underground tunnel, characterized in that a hydraulic jack is provided to enable the fixed blade to be compressed and moved to clamp around the circumference of the underground tunnel.