JP4298465B2 - Formation method of through-hole and arrangement method of wire rod - Google Patents

Description

  The present invention relates to a method for forming a through hole in a side surface of a steel pipe installed in the ground or in water, and a method for arranging a wire rod so as to penetrate the side surface of the steel pipe.

Conventionally, as shown in FIG. 11, when constructing an underground structure 50 in which a plurality of steel pipes 51 are buried adjacent to each other in the ground, the steel pipes 51 are connected to each other using a connecting member 52. I was trying to reinforce it. However, because of the restriction that the steel pipe 51 is buried in the ground, the steel pipe 51 cannot be provided with a through-hole 51 s for attaching the connecting member 52 in advance. A worker enters, and the side surface of the steel pipe 51 is mechanically cut out or melted to form the through hole 51s.
In addition, as shown in FIG. 12, when a plurality of steel pipes 60 are installed in the ground or in the water, and then the filler is filled in the steel pipe 60, the front side or the back side of the paper in FIG. The injection pipe is sent from the injection side into the steel pipe 60 and filled with the filler. However, the injection pipe cannot be installed from the injection side as in the case of using the injection side in other processes at an early stage because of space. In the case, as in the above case, an operator enters the steel pipe 60, and the through-hole 60s is formed by mechanically hollowing out or fusing the side surface of the steel pipe 60. Therefore, it was necessary to fill the filler by feeding the injection pipe 61 into the steel pipe 60.

  On the other hand, in excavation and support when the tunnel pit or cover is thin, it is necessary to form a flat arch on the natural ground, so a large number of tubes are formed along the flat arch in the axial direction of the tunnel. There is a method of reinforcing the above-mentioned ground by constructing a preceding support work by pushing and burying the bodies adjacent to each other. At this time, as a method for stabilizing the preceding support work, for example, as shown in FIG. 13, along the arch portion of the tunnel, while propelling and burying a plurality of jointed steel pipes 10 having joints, Through holes 18s are provided on both side surfaces of the square pipe 11 of the steel pipe with joint 10, the steel wire bundle 20 in which the steel wires 20z are bundled is passed through the through holes 18s, and the steel pipe 10 with joint is filled with concrete. After constructing the preceding support 2, a tensile force is applied and fixed to the steel wire bundle 20 while applying a reaction force at both ends of the preceding support 2 to apply a compressive force to the preceding support 2. A method of stabilizing the preceding support work 2 by deforming in the compression region can be considered.

However, the steel pipes 10, 51, 60 buried in the ground or in the water are generally thick because they are required to have pressure resistance. Therefore, the through holes 18s, 51s, 60s are formed after the steel pipes 10, 51, 60 are buried. It was hard to form.
In addition, when the space inside the steel pipes 10, 51, 60 is narrow, it is difficult to introduce a large machine, so the formation of the through holes 18s, 51s, 60s has to rely on human power.

  The present invention has been made in view of the conventional problems, and a method for easily and efficiently forming a through-hole in a side surface of a steel pipe buried in the ground or in water, and a method of forming the side surface of the steel pipe with a wire rod. It aims at providing the method of arrange | positioning so that it may penetrate.

According to a first aspect of the present invention, either or both the outer and inner sides of the installed steel pipe in the ground or water, through holes going having a cut portion for forming a through hole In the method for forming a through hole, in which a portion is formed in advance, and after the installation of the steel pipe, the predetermined through hole is punched out to form a through hole , a cylinder rod mounted on traveling means is provided in the steel pipe. A hydraulic jack is provided, and the cylinder rod is extended to punch out the predetermined through hole, thereby forming a plurality of through holes on both side surfaces of the steel pipe .
According to the second aspect of the present invention, after a side surface of a steel pipe installed underground or in water is hollowed out in advance, a lid member having the same cross section as the hollowed out space is attached to the hollowed portion by welding. In the method for forming a through-hole, in which a through-hole planned portion is formed and the through-hole planned portion is punched out to form a through-hole after installation of the steel pipe, the cylinder rod mounted on the traveling means in the steel pipe One hydraulic jack provided with the above is arranged, and the cylinder rod is extended to punch out the predetermined through hole, thereby forming a plurality of through holes on both side surfaces of the steel pipe.
As a result, through holes can be easily formed on the side surface of a steel pipe installed in the ground or underwater, and even when the space in the steel pipe is narrow, it is possible to easily and efficiently form a through hole. It becomes.

The invention according to claim 3, a steel pipe extending to the tunnel axis, after connected to each other at a predetermined distance, forming a through hole for passing the wire to the side of the steel tube, the wire A wire rod is disposed so as to pass through the steel pipe, and the through hole is formed using the through hole forming method according to claim 1 or 2. And
According to a fourth aspect of the present invention, in the wire rod arranging method according to the third aspect , a guide tube for guiding the wire rod to the through hole is provided in the steel pipe or in the formed through hole. And

  As described above, according to the present invention, a through-hole planned portion in which a cut portion or a cut-out portion is closed with a lid member is provided on a side surface of a steel pipe installed in the ground or in water, and the through-hole is installed after the steel pipe is installed. Since the through hole is formed by punching out a predetermined location or opening the lid member, the through hole can be formed easily and quickly on the side surface of the steel pipe installed in the ground or in water.

Hereinafter, the best mode of the present invention will be described with reference to the drawings.
In this example, a method of forming a through hole for penetrating a wire on the side surface of a cylindrical body used for constructing a preceding support work in an arch portion of a tunnel will be described.
FIG. 1 is a diagram illustrating a configuration of a steel pipe 10 with a joint in which the through hole is formed on the side surface of a cylindrical body after being buried in the ground. In the figure, 11 is a rectangular tube made of a steel pipe having a rectangular cross section, and 12A, 12B and 12C, 12D are projected horizontally from the upper and lower ends of both side surfaces 11a, 11b of the rectangular tube 11, 1 and the second joint. Specifically, the first joints 12A and 12B are formed by flat plate-like first and second arm portions 13a that project perpendicularly from the side surface 11a of the rectangular tube 11 to the side surface 11a and extend in the tunnel axis direction. , 13b, mounting pieces 14a, 14b projecting vertically from the square tube 11 side of the first and second arm portions 13a, 13b, and projections of the first and second arm portions 13a, 13b. The cylindrical mounting members 15a and 15b are attached to the front end of the direction and extend in the tunnel axis direction. The mounting pieces 14a and 14b face the inner side of the side surface 11a. , 14b are fixed to the side surface 11a of the rectangular tube 11 to attach the first joints 12A, 12B to the side surface 11a. The second joints 12C and 12D include flat plate-like third and fourth arm portions 13c and 13d extending perpendicularly to the side surface 11b from the side surface 11b of the rectangular tube 11 and extending in the tunnel axis direction, Mounting pieces 14c and 14d projecting in the vertical direction from the square tube 11 side of the third and fourth arm portions 13c and 13d, and distal ends of the third and fourth arm portions 13c and 13d in the projecting direction. Each of the mounting pieces 14c, 14d includes a gripping member 16a, 16b having a recessed portion 16s forming a part of the cylinder for inserting and gripping the cylindrical engaging members 15a, 15b. The second joints 12C and 12D are attached to the side surface 11b by fixing the attachment pieces 14c and 14d to the side surface 11b of the square tube 11 so that each faces the inside of the side surface 11b.

In this example, since the steel pipe with joint 10 constitutes a pre-supporting work in the arch portion of the tunnel, the third arm attached to the upper end portion of the side surface 11b of the square tube 11 according to the flatness of the arch portion. The width of the portion 13c is set wider than the width of the fourth arm portion 13d attached to the lower end portion, but the width of the first arm portion 13a at the upper end portion of the side surface 11a of the rectangular tube 11 is set to the lower end portion. May be set wider than the width of the second arm portion 13b, or the width of the arm portion 13a and the arm portion 13c may be set wider than the width of the arm portion 13b and the arm portion 13d, respectively. .
Moreover, in this example, the through-hole planned location by which the notch for forming the through-hole mentioned later was provided in the tunnel axial direction on the outer side of the both side surfaces 11a and 11b of the said square tube 11 is provided. 18 is formed, and the solidified material is injected into the upper surface 11c and the lower surface 11d of the rectangular tube 11 from the inside of the rectangular tube 11 to the ground on the upper surface side and the lower surface side of the rectangular tube 11. A plurality of check valves 19 to be used are provided.

Next, a method for constructing a preceding support for a tunnel having a large cross section using the steel pipe with joint 10 according to the present invention will be described.
In this example, as shown in FIGS. 2 (a) and 2 (b), advanced guiding shafts 4 </ b> A and 4 </ b> B are provided at both ends of the arch portion 3 in the cross section of the preceding support construction 2 constructed in the natural ground 1. The steel pipe bundle 20 is formed by bundling a plurality of steel wires 20z so as to penetrate the plurality of steel pipes 10 with joints after inserting and embedding the steel pipes with joints 10, 10,... Is arranged along the arch portion 3. Then, after temporarily fixing both ends of the steel wire bundle 20 to the reaction force plates 5A and 5B provided in the advanced guiding pits 4A and 4B to which both ends of the steel pipe with joint 10 are fixed, the joints are attached. The preceding support 2 is constructed by filling the steel pipe 10 with concrete.
In this example, after constructing the preceding support structure 2, both ends of the steel wire bundle 20 are fixed while taking reaction force with the reaction force plates 5A and 5B installed in the advanced guiding shafts 4A and 4B. The fixed ends 20a and 20b are made to exert tension force p on the extension line of the arch portion 3 by a jack or the like, and are formed between the fixed ends 20a and 20b and the reaction force plates 5A and 5B by the tension force p. For example, the fixed ends 20a and 20b of the steel wire bundle 20 are fixed by driving a wedge 6 into the gap, and the preceding support 2 disposed between the reaction force plate 5A and the reaction force plate 5B. A compressive force P along the arch portion 3 of the cross section of the tunnel is applied.

When inserting and embedding the steel pipe with joint 10 in the natural ground 1, as shown in FIG. 3, the engaging members 15a and 15a of the steel pipe with joint 10A to be buried next are connected to the steel pipe 10 with joint previously buried. The steel pipe with joint 10A is inserted into the natural ground 1 so as to be inserted into the recesses 16s and 16s of the gripping members 16a and 16b. In FIG. 3, the width of the arm portion 13c and the width of the arm portion 13d are the same in order to make the insertion state easy to understand, but actually, as shown in FIG. Since the width of the arm portion 13c attached to the lower portion is set wider than the width of the arm portion 13d attached to the lower end portion, the width of the upper surface 11c of the square tube 11 and the width of the lower surface 11d are the same. Even if it exists, as shown in FIG. 4, the steel pipe 10 with a some joint can be arrange | positioned on the predetermined | prescribed curve used as the arch part 3 of a tunnel only by changing the width | variety of the arm part 13c.
Moreover, after embedding the steel pipe 10 with a joint, in order to prevent settlement, a ground solidifying agent is injected into the ground on the upper side and the lower side of the steel pipe 10 with a joint, and the ground 1 above and below the steel pipe 10 with the joint is inserted. It is desirable to improve in advance.

Then, as shown in FIG. 5, the steel wire bundle 20 which bundled the some steel wire 20z which penetrates the said several steel pipe 10 with a joint is arrange | positioned along the said arch part of the cross section of a tunnel. Specifically, as shown in FIG. 6 (a), a punching device 30 including a hydraulic jack 32 mounted on a traveling means 31 is introduced into the square tube 11 of the steel pipe 10 with a joint. A through-hole 18s is formed by punching the through-hole planned portion 18 of the tube 11. Since the through hole planned portion 18 of the rectangular tube 11 is cut in advance from the outside into the steel pipe constituting the side surface 11b (or the side surface 11a) of the rectangular tube 11, the cylinder rod of the hydraulic jack 32 is provided. The reaction force plate 32b provided on the opposite side of the tip of the 32a is brought into contact with the inner wall side of the side surface opposite to the through hole planned portion 18 to be punched out of the square tube 11, so that the reaction force plate 32b. If the cylinder rod 32a is extended while the reaction force is applied, and the through-hole planned portion 18 is pushed out of the cylindrical body, the through-hole planned portion 18 can be easily punched to form a through-hole 18s. can do.
Further, when punching a steel pipe, as shown in FIG. 6B, after the punching device 30 is run in one direction, the through-hole planned portion 18 on one side surface of the rectangular pipe 11 is sequentially punched. If the hydraulic jack 32 is reversed and the punching device 30 travels in the opposite direction so as to sequentially punch the through-hole planned portion 18 on the other side surface of the rectangular tube 11, Even when the space is narrow, the through hole 18s can be easily formed.
The punching device 30 sequentially punches the planned through-hole portion 18 on one side surface of the rectangular tube 11, and then returns the punching device 30 to turn it over, and sequentially punches the through-hole planned portion 18 on the other side surface. You may do it.
Alternatively, in place of the hydraulic jack 32, a hydraulic jack having a cylinder rod that expands and contracts in both directions is used to apply a reaction force to the other side surface of the rectangular tube 11, while the through-hole planned portions 18 on both side surfaces are taken. May be punched at the same time.

Next, the steel wire bundle 20 is introduced into the jointed steel pipe 10 connected and buried through the through hole 18s from the inside of one advanced guide shaft 4A (or advanced guide shaft 4B). . At this time, as shown in FIG. 7A, a rail member 21 is laid in the square tube 11, and the inner diameter between the through holes 18s and 18s on the rail member 21 is substantially the same as that of the through hole 18s. If the cylindrical guide pipes 22 are arranged side by side and the steel wire bundle 20 introduced into the square pipe 11 from one through hole 18s is sent out from the other through hole 18s through the guide pipe 22, FIG. As shown in (b), the steel wire bundle 20 can be smoothly passed through a plurality of connected rectangular tubes 11, 11, 11,.
Instead of the guide tube 22, as shown in FIG. 7C, a guide tube 23 longer than the width of the rectangular tube 11 is prepared, and the guide tube 23 is opposed to the rectangular tube 11. The through-hole 18p and the through-hole 18q may be attached to the through-holes 18s and 18s so as to communicate with each other, and the steel wire bundle 20 may be passed through the guide tube 23.

By the way, since the shape of the arch part 3 is flat, the angle between the connected steel pipes 10 and 10 with a joint is very small. Therefore, not only when there is a slight gap between the opposing guide tubes 23, 23 of the adjacent rectangular tubes 11, 11, but also when the guide tube 22 is installed in the rectangular tube 11, one advanced The steel wire bundle 20 introduced from the guide shaft 4A (or the advanced guide shaft 4B) passes smoothly through the guide tube 22 or the guide tube 23 to the other advanced guide shaft 4B (or the advanced guide shaft 4A). Can send.
Next, both ends of the steel wire bundle 20 are temporarily fixed to the reaction force plates 5A and 5B, and then concrete is put into the cylindrical space surrounded by the joints 12A to 12D in the square pipe 11 of the steel pipe with joint 10 and the joints 12A to 12D. After filling and constructing the preceding support work 2, as shown in FIGS. 1 (a) and 1 (b), both ends of the steel wire bundle 20 were fixed while taking reaction force with the reaction force plates 5A and 5B. A tension force p is applied to the fixed ends 20a and 20b on the extension line of the arch portion 3 by a jack or the like. And the fixed ends 20a and 20b of the steel wire bundle 20 are driven by fixing the wedge 6 in the gap formed between the fixed ends 20a and 20b and the reaction force plates 5A and 5B by the tension force p. Is applied to the preceding support 2 disposed between the reaction force plate 5A and the reaction force plate 5B, thereby applying a compressive force P along the arch portion 3 of the cross section of the tunnel. The tension p is applied to the steel wire bundle 20 after the concrete in the steel pipe with joint 10 has hardened, so the steel wire bundle 20 is previously covered with a protective pipe or the like and is not integrated with the concrete. Needless to say, this is necessary.
Finally, a ground having a large cross section is constructed by excavating the natural ground 1 surrounded by the advanced guiding shafts 4A and 4B and the preceding support structure 2.
In this example, since the compressive force is applied in advance to the concrete of the preceding support work 2, even if a tensile force acts on the arch-type advance support work 2 after excavation of the natural ground 1, the concrete is It can be deformed within the compression region to receive the tensile force. Therefore, the preceding supporting work 2 can sufficiently cope with the tensile force without reinforcing the joints 12A to 12D, the joint between the joint 12A and the joint 12C, and the joint between the joint 12B and the joint 12D. Can do.

Thus, in this best mode, the square tube 11 made of a steel pipe having a rectangular cross section and the upper ends of both side surfaces 11a and 11b of the square tube 11 are entered into the natural ground 1 which is the arch portion of the tunnel. A plurality of joint-attached steel pipes 10 provided with joints 12A to 12D projecting horizontally from the lower ends and extending in the tunnel axis direction are engaged members 15a and 15b attached to joints 12A and 12B, and joints 12C and 12D. While inserting and embedding along the arch part 3 while engaging and connecting the gripping members 16a and 16b attached to each other, both end sides of the jointed steel pipe 10 are connected to both end sides of the arch part 3. A steel wire bundle 20 that contacts or is fixed to reaction force plates 5A and 5B provided in the constructed advanced guiding shafts 4A and 4B, and further penetrates the plurality of steel pipes with joints 10 along the arch portion 3 is provided. Place Then, concrete is filled in the steel pipe with joint 10 to construct the preceding support work 2, and then a tension force is applied to the steel wire bundle 20 while taking the reaction force with the reaction force plates 5A and 5B. The fixed ends 20a, 20b of the steel wire bundle 20 are fixed to the reaction force plates 5A, 5B, and a compressive force is applied in advance to the preceding support work 2 disposed between the reaction force plate 5A and the reaction force plate 5B. Since it was made to act, and since it was made to excavate the natural ground 1 of the part enclosed by the said preceding support work 2 and advanced guiding mine 4A, 4B after that, even when a tensile force acted on the said arch part 3, The strength against the tensile force of the preceding support work 2 can be improved. Therefore, it is possible to construct a strong support structure 2 for a large cross section tunnel with a simple joint structure and without reinforcing the joint.
Further, when the through hole 18s for penetrating the steel wire bundle 20 is formed on the side surface of the square tube 11, a notch 18z for forming the through hole 18s is provided outside the side surface of the square tube 11. Since the through-hole planned portion 18 is formed in advance and the through-hole planned portion 18 is punched out after embedding the rectangular tube 11 to form the through-hole 18s, the through-hole 18s can be easily formed. it can.
Further, a hydraulic jack 32 provided with a cylinder rod 32a mounted on the traveling means 31 and extending and contracting in only one direction is disposed in the square tube 11, and the through hole planned portion 18 of the square tube 11 is provided. Since the plurality of through holes 18s are formed on both side surfaces of the square tube 11 by reciprocating while being punched, the through holes 18s are formed even when the space in the square tube 11 is narrow. It can be formed efficiently.

  In the above-described best mode, the case where the through hole 18s for passing the steel wire bundle 20 for applying prestress to the connected steel pipes with joints 10, 10,. Instead, when forming the through-hole 51s for attaching the connecting member 52 for connecting the plurality of steel pipes 51 embedded in the ground, as shown in FIG. 11, the ground shown in FIG. After installing a plurality of steel pipes 60 in the water or in the water, both end portions in the axial direction of the steel pipes 60 are sealed to form through holes 60s through which the injection pipes 61 for filling the steel pipes 60 are passed. It is applicable to any case.

Moreover, in the said example, although the notch 18z was previously provided from the outer side in the steel pipe which comprises the side surfaces 11a and 11b of the square pipe 11, the through-hole planned location 18 was formed, as shown to Fig.8 (a), (b). Then, the side surface of the steel pipe is hollowed out in advance to form a hollowed portion 18h that becomes a through hole, and then a lid member 18m having the same cross section as the hollowed out space is attached to the hollowed portion 18h by welding, The planned hole location 18B may be formed. And after embedding the steel pipe 10 with a joint, the said through-hole planned location 18B is sequentially punched using the said punching apparatus 30 similarly to the said example. Since the planned through-hole portion 18B is attached only at the welded portion 18y and is not connected to the side surfaces 11a and 11b, the through-hole can be easily formed. Alternatively, as shown in FIG. 9 (a), after the hollow portion 18h is formed by previously hollowing the side surface of the steel pipe, the hollow portion 18h is sealed with a lid member 18f, and after the embedded steel tube 10 is embedded. The lid member 18f may be removed to form a through hole. Alternatively, as shown in FIG. 9B, a screw member 11g is formed in the cut-out portion 18h, and a lid member 18n having a screw portion 18g corresponding to the screw portion 11g and screwed into the cut-out portion 18h. It is also possible to prepare and seal the cut-out portion 18h by the lid member 18n.
Also, the attachment of the lid member 18m in FIGS. 8 (a) and (b) is not welding, but as shown in FIGS. 10 (a) and 10 (b), one side of the steel pipe insertion / direction of the lid member 18m. A hinge 18i may be attached to the side, the lid member 18m may be attached to the side surface 11b of the steel pipe, and the lid member 18m may be opened by pressing from within the steel pipe to form a through hole.

  As described above, according to the present invention, since the through-hole can be easily and quickly formed in the side surface of the steel pipe installed in the ground or in water, even a thick steel pipe has a large size. Without introducing a machine, it is possible to easily connect steel pipes or install an injection pipe.

It is a figure which shows the structure of the steel pipe with a joint which concerns on this best form. It is a figure which shows the construction method of the advance support work which concerns on this best form. It is a figure which shows the connection method of the steel pipe with a joint which concerns on this best form. It is a figure which shows the connection state of the steel pipe with a joint which concerns on this best form. It is a figure which shows the prestress addition method which concerns on this best form. It is a figure which shows the punching method of the steel pipe which concerns on this best form. It is a figure which shows the introduction method of the steel wire bundle which concerns on this best form. It is a figure which shows the formation method of the through-hole planned location which concerns on this invention. It is a figure which shows the formation method of the through-hole planned location which concerns on this invention. It is a figure which shows the formation method of the through-hole planned location which concerns on this invention. It is a figure which shows the example of a connection of the steel pipe embed | buried in the ground. It is a figure which shows the example which installed the injection pipe in the steel pipe embed | buried in the ground. It is a figure which shows the method of penetrating a steel wire to the steel pipe with a joint.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground, 2 Advance support work, 3 Arch part, 4A, 4B Advanced guide shaft, 5A, 5B Reaction force plate, 10, 10A Steel pipe with a joint, 11 Square pipe, 12A, 12B 1st joint,
12C, 12D 2nd joint, 13a-13d arm, 14a-14d mounting piece,
15a, 15b engaging member, 16a, 16b gripping member, 16s recess of gripping member,
18 through hole planned location, 18s through hole, 19 check valve, 20 steel wire bundle, 20z steel wire, 21 rail member, 22, 23 guide tube, 30 punching device, 31 traveling means,
32 Hydraulic jack, 32a Cylinder rod, 32b Reaction force plate.

Claims (4)

In either one or both of the outer side and the inner side of the side surface of the steel pipe installed in the ground or in the water, a through-hole planned portion provided with a cut portion for forming a through-hole is formed in advance, and after the installation of the steel pipe, In the method for forming a through hole in which the predetermined through hole is punched to form a through hole, one hydraulic jack provided with a cylinder rod mounted on the traveling means is disposed in the steel pipe, and the cylinder rod is to extend by punching the through hole planned portion, transmural hole forming method for you, characterized in that to form a plurality of through-holes on both sides of the steel tube. After hollowing out the side surface of the steel pipe installed in the ground or in water, a lid member having the same cross section as the hollowed out space is attached to the hollowed portion by welding to form a through-hole planned portion, In the method for forming a through hole, in which a predetermined through hole is punched after the steel pipe is installed, a hydraulic jack having a cylinder rod mounted on a traveling means is disposed in the steel pipe. the cylinder rod is extended by punching the through hole planned portion, transmural hole forming method for you, characterized in that to form a plurality of through-holes on both sides of the steel tube. The steel pipe to extend the tunnel axis, after connected to each other at a predetermined distance, wire forming a through hole for passing the wire to the side of the steel tube, positioning the wire so as to penetrate the steel tube In the arranging method, the through hole is formed by using the through hole forming method according to claim 1 or 2. The wire arranging method according to claim 1, wherein the through hole is formed. The wire arrangement method according to claim 3 , wherein a guide pipe for guiding the wire to the through hole is provided in the steel pipe or in the formed through hole.

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