JPH03260293A - Boring driving method and device - 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] U Industrial Field of Application] The present invention relates to a drilling propulsion method and a drilling propulsion device used for drilling target ground for the purpose of laying electric cables, etc., and is particularly suitable for use in small cross-section tunnels. The present invention relates to a suitable drilling propulsion method and drilling propulsion device.

[Prior art and problems to be solved by the invention] In order to bring out electric wire cables above ground through cable tunnels or shield tunnels, to lay electric wire cables between building structures, or to connect water pipes and sewer pipes from main pipes to houses. The target ground may be perforated for the purpose of laying electric cables in cable tunnels, etc., or for running electric cables from cable tunnels to houses. Especially in urban areas where it is required in recent years to bury electric cables underground.
There is also a great demand for such drilling work.

A drilling propulsion device is used for such drilling work.

By the way, conventional drilling propulsion devices cannot be inserted into cable tunnels (generally small cross-section tunnels of around 2 m) due to their size, so when extending electric wire cables from the ground to the ground, it is necessary to Drilling work is being carried out towards the cable tunnel. In addition, when pulling out Nls cables and the like from the small-section shield tunnel to the ground, a reaching shaft is constructed. Furthermore, when laying water pipes and sewage pipes from main pipes to houses, etc., or when laying electric cables from cable tunnels to houses, excavation work is used. Therefore, it is necessary to secure work space on the ground, such as a space for installing a drilling propulsion device, a space for building a shaft, and a space for excavation work.

However, in recent years, a problem has arisen in that it is often difficult to secure a working space due to traffic conditions, the density of building structures, etc.

In order to solve this problem, the drilling propulsion device itself can be downsized, and drilling can be carried out from small-section tunnels such as cable tunnels.

However, if the conventional drilling propulsion device is miniaturized as it is, the weight becomes small, and therefore, drilling operations cannot be performed. This is because the drilling propulsion device cannot take the reaction force required to propel the drilling. Therefore, conventionally, it has not been possible to perform drilling work in a small space such as inside a cable tunnel using a drilling propulsion device.

The inventions set forth in claims 2 and 4 have been made in view of such problems and circumstances, and further provide a drilling propulsion method and a drilling propulsion device that can perform drilling work even in small-section tunnels such as cable tunnels. The point is to provide the following.

On the other hand, when performing drilling work inside a tunnel or building structure where a conventional drilling propulsion device can be carried in and operated, groundwater and accompanying earth and sand flow into the work site such as inside the tunnel or building structure. Sometimes. Such problems become more pronounced in tunnels with small cross-sections, and in the worst case, drilling may become impossible. Conventionally, in order to prevent the inflow of groundwater and associated earth and sand, water has been stopped by performing auxiliary methods such as chemical injection.

However, auxiliary methods such as chemical injection require considerable costs and costs.
Since it requires labor and time, there is a problem in that drilling work in the ground having a groundwater layer requires considerable cost, labor and time.

The inventions recited in claims 1 and 3 have been made in view of these problems, and their problem is to reduce the construction cost and labor required for drilling work in the ground having an underground water layer compared to the conventional technology. An object of the present invention is to provide a drilling propulsion method and a drilling propulsion device that can reduce the amount of damage and shorten the construction period.

[Means for Solving the Problems] The gist of the invention as claimed in claim 1 is a drilling propulsion method using a drilling propulsion device for drilling a target ground by rotating a crown in contact with the target ground via a casing. A method for promoting drilling, characterized in that, when drilling a hole, a piston provided in the casing is used to stop the flow of groundwater and associated earth and sand from the target ground to the work site.

The gist of the invention as set forth in claim 2 is a drilling propulsion method using a drilling propulsion device for drilling the ground by rotating a crown in contact with a tunnel wall via a casing, the tunnel being brought into contact with the crown. against the wall,
A reaction force support device is installed in contact with the opposing tunnel wall, and the reaction force required for drilling is taken by the reaction force support device, and a piston provided in the casing is used to
The invention consists in a drilling method characterized by stopping the inflow of groundwater and accompanying earth and sand from the target ground into the tunnel.

The gist of the invention as set forth in claim 3 is a drilling propulsion device for drilling a target ground by rotating a crown in contact with the target ground via a casing, comprising: a drilling machine body that rotates the crown via the casing; , a rod penetrating through the body of the drilling machine and extending into the casing, and a rod located in the casing at the tip of the lot to prevent groundwater and accompanying earth and sand from flowing from the target ground to the work site. The present invention resides in a drilling device characterized by being provided with a piston that stops water.

The gist of the invention according to claim 4 is a drilling propulsion device for drilling a hole in the ground by rotating a crown in contact with a tunnel wall via a casing, comprising: a drilling machine body that rotates the crown via the casing; a rod extending through the body of the drilling machine and into the casing;

A piston is provided at the tip of the casing to stop the flow of groundwater and earth and sand from the target ground into the tunnel, and the crown is brought into contact with the main body of the drilling machine. A drilling propulsion device is characterized in that a reaction force support device is provided on a wall portion to take a reaction force required for drilling propulsion at a tunnel wall portion.

[Function] The piston according to the invention described in claims 1 and 3 prevents groundwater and associated earth and sand from flowing into the casing. Therefore, there is no need for auxiliary construction methods such as chemical injection for the purpose of water stoppage. As a result, according to both of the above inventions, compared to the prior art, it is possible to reduce the construction cost and labor required for drilling work in the ground having an underground water layer, and to shorten the construction period.

The reaction force support device 2o according to the invention as claimed in claims 2 and 4 provides a reaction force required for drilling and driving the target ground to the drilling propulsion device. As a result, according to the two inventions, it is possible to perform drilling even in a small cross-section tunnel such as a cable tunnel.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in this example are not intended to limit the scope of this invention to only those, unless specifically stated. It's just an illustrative example.

First, the configuration of the drilling propulsion device according to this embodiment will be explained using FIGS. 1 to 4.

The drilling propulsion device 1 is installed inside a shield tunnel A having an inner diameter of 1844 mm.

As shown in FIGS. 1 and 2, the drilling propulsion device 1 includes a crown 3, a casing 4 provided with the crown 3 at one end, and a drilling machine main body 2 connected to the end of the casing 4. , a rod 10 , and a reaction force support device 20 that supports the drilling machine main body 2 , and is mounted on a trolley 30 .

The crown 3 is a steel pipe having a cutting edge 3a at one end and a threaded groove at the other end.

The casing 4 has a threaded groove that threads into the threaded groove of the crown 3 at one end, and a threaded groove that threads into the threaded groove of the other casing 4 at the other end.

The drilling machine main body 2 has a rotating means for rotating the casing 4. The rotation means is hydraulically operated.

The rod 10 is inserted into the drilling propulsion device 1,
It is a thick-walled steel pipe extending from the rear end of the casing 4 to the rear of the drilling machine main body 2 and having a piston 11 at one end and a water swivel 14 at the other end.

The piston 11 is fitted into the cane puffer 4 and has a check valve 12 at its tip. In addition, the code 11a is a piston ring, the code 11b is a stopper hole,
Reference numeral 13 is a stopper.

As shown in FIG. 2, the reaction force support device 20 is located on both sides of the drilling machine main body 2, and is located on both sides of the drilling machine main body 2.
2 extending from the rear of the crown 3 to near the rear of the crown 3.
The book guide 21, the supports 22 located at the front and rear parts of both guides 21, the support bases 26 provided at the front and rear ends of the guides 21, and the support bases 26 that are expandable and retractable. It has a hydraulic jack (path shown) for this purpose. Both guides 21 guide the drilling machine main body 2 in the moving direction when the drilling machine main body 2 moves forward and backward along the drilling direction, as shown by the dashed line in FIG. Both supports 22 support the guide 21 and the casing 4. Note that the drilling machine main body 2
is held by the reaction force support device 20 by two arms 23.

The arm 23 extends from the side of the drilling machine body 2 to the guide 21, and the end of the arm 23 has the guide 2
It has a grip part 23a that slides on the side of 1. When the drilling machine main body 2 moves back and forth in the drilling direction, two hydraulic cylinders 24 provided on both sides of the drilling machine main body 2 are used.
Move by.

At this time, the reaction force of the hydraulic cylinder 24 is taken from the pressure receiving plate 25. The pressure receiving plate 25 is provided with a plurality of pin holes 21a in the axial direction of both guides 21, and can be temporarily fixed at an optimal position by inserting a bottle into the pin holes 21a.

As shown in FIGS. 1 and 2, the cart 30 includes a chassis 31 having a rectangular outer contour, a support member 32 standing on the chassis 31, and a support member 32 located at the upper end of the support member 32. 1. The /ya 731 includes two vertical frames 31a extending in the direction of movement of the truck 30, and the vertical frames 31
It consists of a horizontal frame 31b that intersects perpendicularly with a. As shown in FIG. 3, the bearing portion 33 consists of an upper bearing 33a and a lower bearing 33b, each having a curved central portion.
The lower bearing 33b is fixed to the support member 32,
The upper bearing 33a is temporarily attached to the support member 32 with a screw.

In the figure, the reference numeral 34 indicates a bearing, the reference numeral 35 a blanket, the reference numeral 36 a shaft, and the reference numeral 37 a universal joint.

Furthermore, in this embodiment, as shown in FIGS. 1 and 2, a hole device 50 is fixedly installed in the segment S of the shield tunnel A. As shown in FIG. 4, the hole opening device 50 includes a steel pipe 51 having a flange projecting outward at one end, and a wide ring-shaped rubber tube provided on the upper surface of the flange. It has a sealing material 52. The inner diameter of the sealing material 52 is slightly smaller than the outer diameter of the casing 4. In the figure, reference numeral 53 is a mouth tube. The mouth pipe 53 can be opened and closed by a lid (channel shown), and can prevent groundwater and associated earth and sand from flowing into the shield tunnel A. Further, reference numeral 40 is a casing band, and reference numeral 4 is a casing band.
1 is a locking tool for locking the casing band 40 to the hole device 50. The casing band 40
consists of two plate-like bodies with curved central parts.

Next, the method of drilling inside the shield tunnel A will be explained with reference to FIGS. 5 and 6 (e). In this embodiment, as shown in FIG. 5, the drilling work is carried out using the drilling propulsion device 1 and incidental equipment, such as a power unit 61, a pump 62, a welder 63, and a casing carrier 64.

First, the segment S of the shield tunnel A is cut using a concrete cutter or the like suitable for carrying out the present invention, and the steel pipe 51 in the hole opening device 50 is cut.
Provide a hole with the same outside diameter as the

Next, the hole opening device 50 is installed inside the hole to the shield tunnel.
Set up. The installation of the hole opening device 50 is carried out using the steel f51.
This is done by welding the other end to segment S of tunnel A. Of course, the scope of the present invention is not intended to be limited thereto, and other methods suitable for carrying out the present invention may be used, such as bolt tightening.

Next, the drilling propulsion device 1 is installed. Installation of the drilling propulsion device 1 is performed by the following steps.

First, the cart 30 is moved and fixed so that it is included in a plane perpendicular to the axial direction of the shield tunnel A, which includes the ground G (ground) to be drilled by the crown 3 of the drilling propulsion device 1.

Next, as shown in FIG. 6(a), the hole opening device 50
(the shield tunnel A
The bearing pressure base 26 of the reaction force support device 20 is extended and fixed at a position opposite in the diametrical direction of the reaction force support device 20. Note that the axial center of the shaft 36 is made to coincide with the cross-sectional center of the shield tunnel A in advance.

Then, the casings 4a of the crowns 3 and - are inserted into the holes provided in the orifice device 50 and the segments S.

Next, as shown in FIG. 6(b), the crown 3 is rotated and the ground G is perforated along with the backfill existing on the outer periphery of the segment S while water is spouted from the check valve 12. . At this time, depending on the hardness of the ground G, etc., the hydraulic jack of the reaction force support device 20 is adjusted to match the reaction force required for drilling. In addition, since the rod 10 is fixed to the negative casing 4a by the stopper 13, it rotates as the negative casing 4a rotates.

Next, after the piston 11 reaches the upper limit as shown in , another casing 4b is added. Such addition of the casing 4b is performed by the following steps.

First, as shown in FIG. 6(c), the rod 10 and the piston 11 are separated, and the four throats 10 are retreated in the direction of the water swivel 14. At that time, the casing band 4o is used to prevent the negative casing 4a from falling.

Next, another casing 4b is inserted between the rear end of the casing 4a marked - in FIG.
are interposed, and the rod 10 and the piston 11, the - casing 4a and the other casing 4b are successively joined.

Next, as shown in FIG. 6(d), remove the stopper, move the rod 1o back together with the piston 11, and attach the piston 1o to the rear end of the other casing 4b.
1 is fixed using the stopper 13.

Through the above steps, another casing 4b can be added.

Next, as shown in FIG. 6(e), the crown 3 is rotated again while water is spouted from the check valve 12 to drill into the ground G.

The casing 4 is added and repeated until the perforation length reaches the required length.

Through the above steps, the ground G can be bored from inside the shield tunnel A.

Furthermore, in this example, the drilling work was performed through the steps described above, but this is not intended to limit the scope of the present invention.
The present invention can be carried out by steps suitable for carrying out the present invention.

Next, the operation of the drilling propulsion method and drilling propulsion device 10 configured as above will be explained.

Since the piston 11 fits into the casing 4,
Prevent groundwater and accompanying earth and sand from flowing into the tunnel A.

The check valve 12 prevents underground water and accompanying earth and sand from flowing back into the rod 1o.

The reaction force support device 20 provides a reaction force required for drilling and promoting the ground G to the drilling propulsion device 1.

The hole opening device 50 connects the segment S of the /-rudo tunnel A and the 7-rudo tunnel A from the outer periphery of the casing 4.
Prevent groundwater and associated sediment from flowing into the mine.

The casing band 40 is formed by sandwiching the casing 4 between two plate-like bodies whose central portions are curved.
The casing 4 is prevented from falling from the ground G.

The trolley 30 facilitates axial movement into the shield tunnel.

The bearing portion 33 facilitates replacement of the drilling propulsion device 1.

Next, the effects of the drilling propulsion method and drilling propulsion device 1 configured as described above will be explained.

The piston 11 can prevent groundwater and accompanying earth and sand from flowing into the tunnel A, so that the ground G to be drilled is a ground G having a groundwater layer.
Even in this case, drilling work can be carried out from inside the shield tunnel A without using auxiliary methods such as chemical injection.

Further, since the reaction force required for drilling the hole can be absorbed by the reaction force support device 20, the drilling work can be carried out even in a small space such as the inside of the shield tunnel A having a small cross section. In particular, in this embodiment, the /
- Since the bearing bases of the reaction force support device 20 are extended and fixed at positions facing each other in the circumferential direction across the axial center to the tunnel, the Can take reaction force.

Further, in this embodiment, since the hole opening device 50 is provided, it is possible to prevent groundwater and accompanying earth and sand from flowing into the tunnel A from the gap between the segment S and the outer periphery of the casing 4. I can do it.

Further, since the drilling propulsion device 1 is placed on the trolley 30, the shield tunnel A can be easily moved in the axial direction.

Further, as shown in FIG. 7, since the truck 30 pivotally supports the drilling propulsion device 1, the drilling propulsion device 1 can rotate in the circumferential direction of the shield tunnel A.

Moreover, since the bearing part 33 is divided into two parts, the drilling propulsion device 1 can be removed and replaced.

In addition, since the opening device 50 is provided with the opening pipe 53, if the opening pipe 53 is connected to a drainage pipe communicating with the outside, groundwater and accompanying earth and sand can be discharged outside the tunnel to the shield tunnel. You can also.

In this embodiment, the hole device 50 is provided in the hole leading to the shield tunnel, but the scope of the present invention is not limited thereto, and the present invention does not intend to limit the scope of the present invention to the hole device 50 or other hole ports. No equipment is required.

In addition, in the drilling process, the shield tunnel A
However, this is not intended to limit the scope of the present invention, and other aspects of the present invention, for example,
This can be carried out over the entire circumference of the shield tunnel A, such as the top T of the shield tunnel. In such a case, by removing the temporary floor F and inserting the water swivel 14 etc. into the gaps between the frames 31a and 31b of the truck 30 as shown in FIGS. Perform with the rod 10 axis vertical.

Further, in such a replacement work, the drilling machine main body 2 is separated from the bearing portion 33, and the position of the temporary floor F is removed so that such replacement can be made possible.

Further, although the above-mentioned drilling propulsion device 1 and drilling propulsion method are applied to a shield tunnel A with a small cross section, the scope of the present invention is not limited thereto, and the present invention applies to other tunnels, such as a large cross section tunnel. Any place suitable for carrying out the present invention can be used, such as inside a mine or inside a building structure. In such a case, a scaffold may be constructed so that the support platform 26 of the reaction force support device 20 can be installed.

Furthermore, although the mouth tube 53 is provided in the orifice device 50, it is not intended to limit the scope of the present invention thereto, and it may not be provided in the present invention. In such a case, even if the mouth pipe 53 is not closed with a lid, groundwater and the earth and sand accompanying it will not flow into the shaft of the shield tunnel A.

Further, although the drilling propulsion device 1 is mounted on the trolley 30, this is not intended to limit the scope of the present invention, and it is not necessary to place it on the trolley 30 in the present invention.

Furthermore, although the axis of the shaft 36 and the axis of the shield tunnel A coincide, this is not intended to limit the scope of the present invention;
6 is provided with a universal joint 37, so that the support member 3
By changing the length of 2, the axis of the shaft 36 can be made oblique with respect to the axis of the shield tunnel A. In such a case, a diagonal hole can be bored from the shield tunnel A.

Further, although the axial center of the shaft 36 is made to coincide with the axial center of the /-rud tunnel A, the scope of the present invention is not limited thereto, and the present invention can be implemented even if the axial center is not made to coincide with the axial center of the shaft 36. . In such a case,
It is also possible to make holes in directions other than the normal direction within the same cross section of the shield tunnel A.

Further, although the drilling propulsion device 1 is provided with the piston 11, this is not intended to limit the scope of the present invention, and the piston 11 may not be provided in the present invention.

Furthermore, although the piston 11 is provided in the drilling propulsion device 1, this is not intended to limit the scope of the present invention.
In the present invention, other devices suitable for carrying out the present invention can be used, such as large-scale drilling propulsion devices that have been used in the past.

Further, although the drilling propulsion device 1 is provided with the reaction force support device 20, the scope of the present invention is not limited thereto, and the reaction force support device 20 may not be provided in the present invention.

Further, although the drilling propulsion device 1 is operated by hydraulic pressure, this is not intended to limit the scope of the present invention.
The present invention can be operated by other drive means suitable for carrying out the present invention, such as electricity.

Although the piston 11 has the above-mentioned configuration, it is not intended to limit the scope of the present invention, and the piston of the present invention may have other configurations, such as a packing made of comb that fits into the caning 4, etc. including those suitable for implementation.

[Effects of the Invention] The invention described in Claims 1 to 4 is configured as described above, so that the following effects can be achieved.

The invention described in claims 1 and 3 is such that the piston can prevent groundwater and accompanying earth and sand from flowing into a work site such as a tunnel or a building structure. Even if there is, drilling work can be performed without using auxiliary methods such as chemical injection. As a result, according to the two inventions, compared to the prior art, it is possible to reduce the construction cost and labor required for drilling work in the ground where the ground to be drilled has an underground water layer, and to shorten the construction period.

The inventions described in claims 2 and 4 can take the reaction force required to advance the drilling of the target ground using the reaction force support device, so that drilling work can be carried out even in small spaces such as inside cable tunnels and inside building structures. It can be carried out. Therefore, according to the two inventions, drilling from the ground toward a cable tunnel when pulling out electric cables from the ground to the ground, construction of reaching shafts when pulling out electric cables, etc. from the inside of a shield tunnel to the ground, and water pipes. This eliminates the need for excavation work when laying a sewage pipe from a main pipe to a house, etc., or when running an electric wire cable from a cable tunnel to a house.

As a result, according to the two inventions, compared to the prior art, construction costs and labor required for drilling work in a small space can be reduced, and construction period can be shortened.

[Brief explanation of drawings]

Figures 1 to 7 show one embodiment of the present invention, with Figure 1 being a front view showing the drilling propulsion device installed in a shield tunnel, and Figure 2 being a side view of the drilling propulsion device. ,
Figure 3 is an enlarged view showing the vicinity of the bearing part, Figure 4 is the disassembly of the port device and casing band, Figure 5 is a side view showing the working condition inside the shield tunnel, and Figure 6 (A). 6(e) to 6(e) are process diagrams, and FIG. 7 is a front view showing a state in which the drilling propulsion device is replaced. A...Shield tunnel, G...Ground (ground) 1...Drilling propulsion device, 2...
Drilling machine body, 3... Crown, 4...
Casing, IO...Rod, 11...
・Piston, 20...Reaction force support device, 26...
... Bearing platform, 30 ... Trolley, 50 ...
...pore device,

Claims (4)

[Claims] (1) A drilling propulsion method using a drilling propulsion device that drills a target ground by rotating a crown in contact with the target ground via a casing, and when drilling, a piston provided in the casing A drilling method that is characterized by stopping the flow of groundwater and accompanying earth and sand from the ground to the work site. (2) A drilling propulsion method using a drilling propulsion device that drills into the ground by rotating a crown in contact with a tunnel wall via a casing, the crown being in contact with a tunnel wall in a direction opposite to the tunnel wall. A reaction force support device is installed in contact with the tunnel wall, and the reaction force support device takes the reaction force required for drilling, and the piston installed in the casing allows underground water and water to flow from the target ground into the tunnel. A drilling method characterized by stopping the inflow of earth and sand associated with this. (3) A drilling propulsion device for drilling target ground by rotating a crown in contact with the target ground via a casing, which includes a drilling machine body that rotates the crown via the casing, and an interior of the drilling machine body. a rod that penetrates and extends into the casing, and a piston is provided at the tip of the rod, which is located inside the casing and stops the flow of groundwater and associated earth and sand from the target ground to the work site. A punching device characterized by: (4) A drilling propulsion device that drills into the ground by rotating a crown in contact with a tunnel wall via a casing, which includes a drilling machine body that rotates the crown via the casing, and an interior of the drilling machine body. a rod that penetrates and extends into the casing, and a piston is provided at the tip of the rod, which is located inside the casing and stops the flow of groundwater and accompanying earth and sand from the target ground into the tunnel. The drilling propulsion device is characterized in that the drilling machine main body is provided with a reaction force support device that takes a reaction force required for drilling propulsion at the tunnel wall portion against which the crown comes into contact.