JP6124586B2 - Tube support device and tube support method - Google Patents

Description

  The present invention relates to a tube support device and method for improving insertion accuracy when a tube is inserted into a natural ground or the like.

  As one of the auxiliary construction methods used when constructing a tunnel, a steel pipe tip receiving construction method is often used in order to improve the stability of the face and to suppress the settlement of the ground surface. There is a long tip receiving method as a tip receiving method using a steel pipe having a length of 5 m or more. The prior receiving method is also referred to as a fore-piling method, and is a method of supporting the natural ground above the excavation site prior to tunnel excavation.

  In the long edge receiving method, a steel pipe as a receiving member is inserted into the ground so that the vulnerable ground is not collapsed. As a machine for inserting the steel pipe, a dedicated machine can be used. However, if a drill jumbo which is a general-purpose machine can be used, it is desirable because construction can be performed at low cost.

  In the case of using a drill jumbo, conventionally, an arcuate steel material 10 constructed in conformity with the shape of a tunnel as shown in FIG. A pipe support device 11 provided with a departure prevention stopper 11c is attached, and while supporting the steel pipe 12 by the pipe support device 11, the drill jumbo 13 is directed toward the natural ground 14 which is the longitudinal direction of the steel pipe 12 as shown in FIG. Inserting. As the steel pipe 12, for example, a steel pipe having a length of about 10 to 20 m is used by adding a steel pipe of about 3 m. In the case of receiving a long section longer than that, a part is overlapped as shown in FIG. This shape is called an umbrella arch because it resembles an umbrella.

  In order to realize such a desirable overlap, it is necessary to insert the steel pipe 12 so as to be inclined at a predetermined angle with respect to the tunnel axis direction, instead of inserting the steel pipe 12 in parallel with the tunnel axis direction indicated by the arrow A. There is. In the pipe support device 11, the bottom-raised metal fitting 11b (simple plate or box) is manufactured according to the actual product, so that the steel pipe 12 can be inserted and installed so as to be inclined at a predetermined angle.

  As a configuration for supporting the steel pipe 12 at a predetermined angle as described above, conventionally, a configuration in which a pipe support member that supports the plurality of steel pipes 12 at a predetermined angle is provided on the upper surface or the lower surface of the arch-shaped steel material 10 (Patent Document). 1), a structure in which a guide is provided in a hole provided in the arch-shaped steel material 10 itself, the steel pipe 12 is inserted into the guide, and the guide supports the steel pipe at a predetermined angle (see Patent Document 2), etc. is there.

JP 2008-248528 A JP 2008-075292 A

  The pipe support member and the guide are fixed to the arch-shaped steel material 10 and use a short pipe inclined at a predetermined angle. Therefore, the pipe support member and the guide may be inserted without a certain amount of play between the pipe and the steel pipe 12. Can not. However, if there is play, the steel pipe 12 will rattle, and the accuracy of inserting the steel pipe 12 into the ground will be reduced. The same can be said for the tube support device 11 shown in FIG.

  Moreover, since these are fixed to the arched steel material 10 and the pipe and the bottom raising metal fitting 11b do not move up and down, fine adjustment cannot be freely performed. For this reason, it is difficult to divert these to other sites, etc., and they must be manufactured and installed in-situ. This is time consuming and expensive.

  Therefore, it has been desired to provide a pipe support device and method that can suppress the rattling of the steel pipe 12 and make fine adjustments, and that does not require much time for installation.

  In view of the above problems, the present invention is a tube support device for supporting a part of the tube used when the tube is inserted at a predetermined angle, and a mounting member for supporting a part of the tube; A first adjusting mechanism that adjusts the position of the mounting member in the vertical direction with respect to the installation surface on which the support device is installed and fixes the mounting member at the adjusted position, and extends in a direction perpendicular to the longitudinal direction of the tube A support device including a rod-shaped member and a second adjusting mechanism that adjusts the position of the rod-shaped member in a direction perpendicular to the installation surface and fixes the rod-shaped member adjacent to the upper portion of the tube so that the tube does not rise. The tube support device enables the tube to be inserted at the above angle by changing the position of each mounting member provided in each support device in the direction perpendicular to the installation surface. Is provided.

  By providing the pipe support device and the pipe support method of the present invention, it is possible to suppress rattling when the pipe is inserted into the natural ground, and to improve the insertion accuracy of the pipe. In addition, it is possible to reduce the trouble of installing the site.

The figure which showed the structural example of the conventional pipe support apparatus. The figure which showed the place which has inserted the pipe into the natural ground using the drill jumbo. The figure which illustrated the umbrella arch formed by the some pipe | tube inserted in the natural ground. The figure which showed the structural example of the support apparatus used for the pipe support apparatus of this embodiment. The perspective view which showed the structural example of the support apparatus used for the pipe support apparatus of this embodiment. Sectional drawing which showed the example of the mounting member with which the support apparatus shown in FIG. 4 is provided. The figure which showed the example of the 1st adjustment mechanism with which the support apparatus shown in FIG. 4 is provided. The flowchart which showed the flow of the process which supports a steel pipe using a pipe support apparatus.

  4 and 5 are diagrams showing a configuration example of a support device used in the tube support device of the present embodiment. The tube support device is composed of at least two support devices 100. 4A is a front view of the support device 100, FIG. 4B is a side view thereof, and FIG. 5 is a perspective view thereof. The support device 100 is, for example, attached to an arched steel material matched to the tunnel shape using a clamp or the like in a long tip receiving method during tunnel excavation, and inserted into a natural ground in the longitudinal direction of the pipe. Used to support a portion of the tube. Here, although it demonstrates as what is used for a long tip receiving construction method, even if it is other than this construction method, it can be used when it is necessary to insert a pipe | tube with high precision.

  As the arch-shaped steel material, a material obtained by bending a H-shaped steel having a H-shaped cross section into a semicircular shape is used. This steel material is installed in the tunnel axis direction at regular intervals, attached to each of the plurality of steel materials so that the support device 100 is arranged toward the tunnel axis direction, and one pipe is formed by the plurality of support devices 100 arranged. Support.

  As the pipe, for example, a steel pipe having a diameter of 4 to 6 inches is used. The other end of the steel pipe is connected to a general-purpose machine called a drill jumbo, and a drilling member called a bit is attached to one end. The middle of the longitudinal direction of the steel pipe is supported by a plurality of support devices 100 arranged.

  In drilling with a rock drill mounted on a drill jumbo, as an example, using a connecting member called a sleeve, a drilling rod in a steel pipe and a rotating member that rotates in a certain direction called a shank rod in a rock drill Link. When a rock drilling machine applies rotational force, propulsive force and striking force to the drilling rod, the drill jumbo drills a natural ground with a bit at the tip at a predetermined inclination angle and is connected to the rear end of the bit accordingly. The inserted steel pipe is inserted into a desired position in the natural ground and installed. By the way, the drilling rod is recovered after the drilling is completed, and only the steel pipe is left in the ground.

  The drill jumbo has a plurality of booms on which the rock drill is mounted, and a plurality of steel pipes can be inserted and installed at the same time. Using this drill jumbo, the steel pipe is installed at each position of the natural ground, and finally an umbrella arch as shown in FIG. 3 is formed.

  The support device 100 uses a part of the upper curved surface portion of one arch-shaped steel material made of H-shaped steel as an installation surface, and a bottom plate 101 whose one surface is adjacent to the installation surface, and the other of the bottom plate 101. Two side plates 102 and 103 connected to the surface and extending in parallel to the other surface in the vertical direction are provided. Since the arched steel material has a very large curvature, a part of the upper curved surface portion can be regarded as a substantially flat surface.

  The bottom plate 101 and the side plates 102 and 103 are steel plates and are connected to each other by welding or the like. The bottom plate 101 is, for example, a flat plate, but may be a plate having a certain curvature according to the arched steel material. As shown in FIG. 4B, the side plates 102 and 103 are each formed with three holes 104, 105, and 106 extending in a direction perpendicular to the installation surface at predetermined positions.

  Between the side plate 102 and the side plate 103, as shown in FIG. 4A, a mounting member 108 having a lower support portion 107 that supports a part of the steel pipe 120 indicated by a broken line is provided. This is because the lower support portion 107 firmly supports a part of the steel pipe 120. In FIG. 5, the steel pipe 120 is cut in order to make it easier to understand the arrangement relationship with the steel pipe 120, but actually, the steel pipe 120 extends from the support device 100 so as to project both.

  The lower support portion 107 is a protruding portion that protrudes in one direction, and can support the steel pipe 120 in a point manner. In addition, it is not limited to point support, It may be made into a lower support surface and can be surface supported. However, if the surface is supported, the steel tube 120 and the lower support surface are rubbed and the frictional force is increased when the steel tube 120 is inserted into the support device 100, so that point support is preferable.

  For example, as shown in FIG. 6, the lower support portion 107 can be a protrusion having a semi-circular cross section. By providing such a semicircular protrusion, the steel pipe 120 can be sufficiently supported while reducing the contact portion with the steel pipe 120 as much as possible, and the frictional resistance at the time of inserting the steel pipe can be reduced. . Thereby, insertion of the steel pipe 120 to the support apparatus 100 becomes easy.

  Although the semicircular protrusion is used here, the cross section may be a protrusion having a mountain shape, an oval shape, or the like. In addition, the semicircular protrusion does not have to be hollow as shown in FIG. The same applies to a case where the cross section is a mountain shape, an oval shape, or the like.

  Referring to FIGS. 4 and 5 again, the position (height position) of the mounting member 108 in the direction perpendicular to the installation surface is adjusted by the first adjustment mechanism 109. The height position of the lower support portion 107 of each mounting member 108 is adjusted by the first adjustment mechanisms 109 provided in the at least two support devices 100 so that the steel pipe 120 is inclined at a predetermined angle. Is done. The angle can be determined in consideration of the length of the steel pipe 120, the characteristics of natural ground, and the like. For example, the angle can be 2 to 15 ° with respect to the tunnel axis direction. This is an example, and may be at an angle below or above that range.

  The first adjustment mechanism 109 includes, for example, two holes 105 and 106 provided in the side plates 102 and 103, a mounting member support surface that supports the mounting member 108, and a side plate contact portion that contacts the side plate 102 or the side plate 103. And a fastening member 111 that fastens the side plate 102 or the side plate 103 and the support member 110 to each other.

  The support member 110 may be a simple plate having a substantially rectangular parallelepiped shape as shown in FIG. 4A. However, as shown in FIG. 7A, the support member 110 is a member having an L-shaped cross section, and the mounting member 108 is firmly attached. It can also be of a structure that can be supported. However, when the side plate abutting portion 112 is flat as shown in FIG. 7A, when the fastening means 111 is loosened, the side plate 102 is displaced from the side plate 102, and the mounting member 108 is moved. The height position will change. This causes a shift in the insertion direction of the steel pipe 120.

  Therefore, as shown in FIG. 7B, the side plate abutting portion 112 and the side plate 102 can be provided with fitting surfaces 113 and 114 having concavities and convexities to be fitted to each other. Accordingly, even if the fastening means 111 is loosened due to vibration or the like when the steel pipe is inserted, the fitting surfaces 113 and 114 hold the mutual teeth so that the height position of the mounting member 108 is maintained. Is not changed, and the insertion accuracy of the steel pipe 120 can be maintained. Although only the side plate 102 is illustrated in FIG. 7, a similar configuration can be adopted for the side plate 103.

  Thus, although the structure provided with the fitting surfaces 113 and 114 is preferable, since the height position is adjusted for every pitch of adjacent teeth, fine adjustment cannot be performed. For this reason, in order to enable the fine adjustment as much as possible, it is desirable to make the teeth as small as possible and increase the number thereof. Further, the teeth are not limited to the mountain shape as shown in FIG. Here, the configuration including the fitting surfaces 113 and 114 having irregularities is illustrated, but other configurations that have been known so far that have the same effect can also be adopted.

  The fastening means 111 can be, for example, a bolt and a nut. The fastening means 111 includes a washer, and the side plate 102 or the side plate 103 and the support member 110 can be fastened with a bolt and a nut via the washer.

  In addition, a clamp or the like can be employed as the fastening means 111. Here, it is configured to be fastened using the fastening means 111, but after adjusting it to a predetermined height position, it is bonded using an adhesive or welded, and the side plate 102 or It is also possible to fix the side plate 103 and the support member 110 permanently.

  The adjustment of the height position of the mounting member 108 by the first adjustment mechanism 109 is performed by loosening the nut as the fastening means 111 and sliding (sliding) the bolts inserted into the holes 105 and 106 provided in the side plate 102 or the side plate 103. Can be performed. After the adjustment to the desired height position, the mounting member 108 is fixed at that position by tightening the nut.

  Referring to FIGS. 4 and 5 again, support device 100 includes a rod-like member 115 extending in a direction perpendicular to the longitudinal direction of steel pipe 120, and a height position of rod-like member 115 in a direction perpendicular to the installation surface. And a second adjustment mechanism 116 that fixes the rod-shaped member 115 adjacent to the upper portion of the steel pipe 120 so that the steel pipe 120 does not float up.

  The rod-like member 115 may be a simple round bar having a predetermined diameter, but it is also possible to employ a combination of a round bar and a ball bearing so that the round bar can be rotated. Thus, by comprising so that rotation is possible, the frictional resistance at the time of insertion of the steel pipe 120 can further be reduced. Here, the configuration using the ball bearing is illustrated, but it is also possible to configure the round bar to be rotatable by using other means such as a roller bearing.

  Both ends of the rod-shaped member 115 are inserted into one hole 104 provided in the side plates 102 and 103, and the height position of the rod-shaped member 115 is adjusted by the second adjustment mechanism 116 and fixed to the side plate 102 and the side plate 103. The In one example, both ends of the rod-shaped member 115 are threaded. The second adjustment mechanism 116 includes a hole 104 provided in the side plates 102 and 103 and nuts that are screwed to both ends of the rod-like member 115. Again, a washer can be included.

  The height position of the rod-shaped member 115 can be adjusted by loosening the nut and sliding the rod-shaped member 115 inserted through the hole 104. Also in this case, after adjusting to a desired height position, the rod-shaped member 115 is fixed to the position by tightening the nut.

  With reference to the flowchart shown in FIG. 8, the method of supporting a pipe | tube using a pipe | tube support apparatus is demonstrated. The method is started from step 800, and in step 810, the position of the mounting member 108 that supports a part of the steel pipe 120 in the direction perpendicular to the installation surface on which each support device 100 is installed. And the mounting member 108 is fixed at an appropriate position.

  Specifically, first, at least two support devices 100 are installed on each installation surface. For example, each support device 100 is installed by fastening the bottom plate 101 and the arched steel material using a clamp as shown in FIG. And about each support apparatus 100, the nut which is the fastening means 111 with which the 1st adjustment mechanism 109 is provided is loosened. Next, the bolts inserted through the holes 105 and 106 of the side plates 102 and 103 are slid for each supporting device 100.

  First, the height position of each edge part of the bottom face of the mounting member 108 of one support apparatus 100, for example, the front end side and the end side of the steel pipe 120 is determined, and the nut is tightened and fixed at that position. The height position is determined by the length of the steel pipe 120, the insertion angle, the distance from the support device 100 to the natural ground, and the like. Similarly, the mounting member 108 of the next support device 100 determines the height position. However, when the support device 100 is closer to the ground than the previous support device 100, the previous support device 100. The height position is determined so as to be higher than the height position of the mounting member 108 and lower when it is on the drill jumbo side, and is fixed at that position. Thereby, it becomes possible to insert the insertion angle of the steel pipe 120 as a predetermined angle.

  In step 820, the steel pipe 120 is inserted into the opening formed by the two side plates 102 and 103, the mounting member 108, and the rod-like member 115 of each support device 100. That is, the steel pipe 120 is inserted into each opening of each support device 100 arranged in the longitudinal direction of the steel pipe 120. In step 830, the second adjustment mechanism 116 of each support device 100 adjusts the height position of the rod-shaped member 115 and fixes the rod-shaped member 115 adjacent to the upper portion of the steel tube 120 so that the steel tube 120 does not float up. . When the upper portion of the steel pipe 120 is fixed by the rod-like member 115 of each support device 100, the process ends at step 840.

  When inserting step 820, each rod-like member 115 is lifted upward by each second adjusting mechanism 116, and each opening is made as wide as possible. The steel pipe 120 is inserted into each widened opening by a drill jumbo. In step 830, first, the nut provided in each second adjustment mechanism 116 is loosened. Next, each rod-like member 115 inserted through the hole 104 of each side plate 102, 103 is slid down. And the place where each rod-shaped member 115 reached the position adjacent to the upper part of the steel pipe 120 is made into the height position which should be adjusted, a nut is tightened in that position, and it fixes to that position.

  The support device 100 includes the first adjustment mechanism 109, so that the steel pipe 120 can be freely finely adjusted to a predetermined height position. By using two or more support devices 100, a difference in height can be provided. The steel pipe 120 can be inserted at a predetermined angle. Since the height position can be adjusted in this way, it can be diverted to other sites. In addition, it is not necessary to make the actual product, so that it is possible to reduce the time and effort of installation and to eliminate extra costs.

  Moreover, the support apparatus 100 can suppress the shakiness of the inserted steel pipe 120, without providing the 2nd adjustment mechanism 116, without preventing insertion of the steel pipe 120. Thereby, the insertion precision to the natural ground etc. of the steel pipe 120 can be improved. Furthermore, by providing the mounting member 108 with a projecting portion having a convex cross section as illustrated in FIG. 6, it is possible to reduce the frictional resistance when inserting the steel pipe, and to smoothly insert the mounting member 108.

  So far, the pipe support device and the pipe support method of the present invention have been described in detail with reference to the embodiments shown in the drawings. However, the present invention is not limited to the above-described embodiments, and other embodiments are described. It can be modified within the range that can be conceived by those skilled in the art, such as addition, change, deletion, etc., and any embodiment is included in the scope of the present invention as long as the operation and effect of the present invention are exhibited. is there.

  In the embodiment described above, the lower portion and the upper portion of the steel pipe 120 are sandwiched by the lower support portion 107 and the rod-like member 115 of the mounting member 108 to prevent the steel pipe 120 from rattling up and down. It is also possible to provide members and mechanisms such as the mounting member 108, the first adjustment mechanism 109, the rod-like member 115, and the second adjustment mechanism 116 in the section, and to prevent the steel pipe 120 from shaking from side to side.

  For example, the side contact member such as the placement member 108 and the rod-shaped member 115 arranged near the side of the steel pipe 120 and the side contact member are moved so as to be adjacent to the side of the steel pipe 120. And a third adjustment mechanism such as the first adjustment mechanism 109 and the second adjustment mechanism 116 that are fixed to each other. This is an example, and other configurations can be adopted as long as the steel pipe 120 can be prevented from rattling from side to side.

DESCRIPTION OF SYMBOLS 10 ... Steel material, 11 ... Pipe support apparatus, 11a ... Bar-shaped part, 11b ... Bottom raising metal fitting, 11c ... Deviation prevention stopper 11c, 12 ... Steel pipe, 13 ... Drill jumbo, 14 ... Ground, 100 ... Support apparatus, 101 ... Bottom plate, 102, 103 ... side plate, 104-106 ... hole, 107 ... lower support part, 108 ... mounting member, 109 ... first adjustment mechanism, 110 ... support member, 111 ... fastening means, 112 ... side plate contact part, 113, 114 ... mating surface, 115 ... rod-shaped member, 116 ... second adjusting mechanism, 120 ... steel pipe

Claims (6)

A tube support device for supporting a part of the tube used when inserting the tube at a predetermined angle,
A mounting member for supporting a part of the tube;
A first adjusting mechanism that adjusts the position of the mounting member in the vertical direction with respect to the installation surface on which the support device is installed, and fixes the mounting member at the adjusted position;
A rod-like member extending in a direction perpendicular to the longitudinal direction of the tube;
A second adjusting mechanism that adjusts the position of the rod-shaped member in a direction perpendicular to the installation surface and fixes the rod-shaped member adjacent to the upper portion of the tube so that the tube does not float ;
A bottom plate adjacent to the installation surface;
Connected to said bottom plate, viewed including the <br/> and two side plates extending in the vertical direction with respect to the installation surface,
The mounting member is disposed between the two side plates, and the tube is inserted into an opening formed by the two side plates, the mounting member, and the rod-shaped member, Sandwiched between the rod-shaped members,
Each of the two side plates is formed with three holes extending in a direction perpendicular to the installation surface, and one of the three holes allows the rod-shaped member to slide and the second side plate. The adjustment mechanism is used to adjust the position of the rod-shaped member, and the remaining two holes are used to adjust the position of the mounting member by allowing the fastening means provided in the first adjustment mechanism to slide. By installing at least two of the supporting devices with respect to the pipe, and changing the position of each mounting member included in each of the supporting devices in a direction perpendicular to the installation surface, the pipe at the angle. A tube support device that makes it possible to insert. The first adjusting mechanism is inserted into a support member including a mounting member support surface that supports the mounting member, a side plate contact portion that contacts the side plate, and a hole provided in the side plate contact portion. The tube support device according to claim 1 , comprising: the fastening means for fastening the side plate and the support member. The tube support device according to claim 2 , wherein the side plate abutting portion and the side plate include a fitting surface having irregularities to be fitted to each other. The said mounting member is provided with the protrusion part for carrying out the point support of the said pipe | tube, and the said rod-shaped member is comprised rotatably, The any one of Claims 1-3 characterized by the above-mentioned. Tube support device. The side part contact member arrange | positioned adjacent to the side part of the said pipe | tube, and the 3rd adjustment mechanism which moves the said side part contact member and adjoins the side part of the said pipe | tube, and further fixes it. tube support apparatus according to any one of 1-4. A method of supporting a portion of a tube using a tube support device to insert the tube at a predetermined angle,
Each of the at least two support devices included in the tube support device is formed on two side plates that are connected to a bottom plate adjacent to an installation surface on which the support device is installed and extend perpendicular to the installation surface. using two holes of the three holes which extend in a direction perpendicular to said installation surface, by a fastening means for the first adjusting mechanism is provided to permit sliding in the vertical direction with respect to the installation surface, Adjusting the position of the mounting member that supports a part of the tube, and fixing the mounting member at the adjusted position;
The tube is inserted into an opening formed by a rod-like member extending in a direction perpendicular to the longitudinal direction of each of the said two side plates supporting device comprises a before and placement member tube, before placing member Clamping with the rod-shaped member ;
For each of the support devices, the remaining one of the three holes is used to allow the second adjustment mechanism to slide , thereby adjusting the position of the bar-shaped member in the direction perpendicular to the installation surface. And fixing the rod-like member adjacent to the top of the tube so that the tube does not float up,
A method of allowing the tube to be inserted at the angle by changing a position of each mounting member in a direction perpendicular to the installation surface in the step of fixing the mounting member.