JP2017043981A - Movement method of work floor in vertical shaft or inclined shaft and lining construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movement method of a work floor in a vertical shaft or an inclined shaft excellent in workability, and a lining construction method of the vertical shaft or the inclined shaft.SOLUTION: A backfilling material 27 is filled inside a vertical shaft 17. The backfilling material 27 is filled up to the vicinity of a ground 1 in the vertical shaft 17. An upper surface of the backfilling material 27 functions as a work floor 25. A part above the backfilling material 27 is excavated, and the excavated backfilling material 27 is inputted from the upper end of a pipe 19. The backfilling material 27 inputted to the pipe 19 is sent out to a lower space 3 via the pipe 19. Thus, the backfilling material 27 is excavated above and is sent out downward via the pipe 19, so that an upper surface position of the backfilling material 27 is moved downward by quantity of the excavated backfilling material 27. That is, the work floor 25 moves downward.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a work floor moving method for moving a work floor from above to below in a vertical shaft or a tilt shaft, and a lining construction method using the same.

  When constructing a vertical shaft or an inclined shaft, for example, there is a reverse winding method in which after digging the ground, a wall lining construction is performed while hanging a centrifugal sprayer or the like from above (for example, Patent Document 1 and Patent Document 2).

Japanese Patent Laid-Open No. 08-246475 Japanese Patent Laid-Open No. 11-29941

  In the conventional reverse winding method, the lining work is performed by suspending equipment from above. At this time, for example, the operator performs an operation on the scaffold above the centrifugal spraying machine while suspending the centrifugal spraying machine. Further, when excavating a shaft or the like, the excavated earth and sand are discharged from above, and therefore the operator needs to retreat when discharging the earth and sand.

  Thus, during excavation and lining spraying work, workers are required to work on unstable scaffolds, and there are many lifting work of equipment and soil, and it is necessary for the workers to evacuate each time. There are problems in terms of safety and workability.

  In addition, it is sufficient if the upper space of the vertical shaft or the inclined shaft can be secured sufficiently, but when the upper space is restricted, it is difficult to hang a large device from above the vertical shaft or the inclined shaft. There is a case.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a method for moving a work floor in a vertical shaft or a tilt shaft with excellent workability, and a lining construction method using the method.

  In order to achieve the above-mentioned object, the first invention is a method for moving a work floor in a shaft or a tilt shaft, in which a backfill material is filled in the shaft or the tilt shaft, and the upper surface of the backfill material is used as a work floor. In a shaft or tilt shaft, comprising: step a; and a step b in which a part of the backfill material is removed from a space below the shaft or tilt shaft and the work floor is moved downward. This is a method of moving the work floor.

  Before the step a, a pipe is installed in the shaft or inclined shaft, and in the step b, a part of the backfill material is sent downward through the pipe from above the work floor, and the work floor is lowered. It may be moved to.

  The backfilling material is preferably gravel having an adjusted particle size.

  According to the first invention, the work floor on the upper surface of the backfill material can be moved by filling the vertical shaft or the inclined shaft with the backfill material and removing the backfill material from the lower space. For this reason, it is not necessary to excavate the backfill material and discharge it from above. Moreover, since the worker can work on the work floor, the work on the suspended unstable work scaffold can be reduced.

  Moreover, by installing the pipe in the vertical shaft or the inclined shaft, a part of the backfill material can be sent downward through the pipe from above the work floor. For this reason, a work floor can be moved stably.

  In addition, if the backfill material is gravel having an adjusted particle size, the backfill material can be easily discharged. Moreover, it can suppress that a backfill material is hardened, and excavation is easy.

  2nd invention utilizes the moving method of the work floor in a shaft or a slope shaft concerning 1st invention, installs a lining apparatus in the said work floor, performs lining construction to the wall surface of the said shaft or a slope shaft, It is a lining construction method for a vertical shaft or a tilt shaft, characterized in that wall lining is performed from the upper side to the lower side of the vertical shaft or the tilt shaft by repeatedly moving the floor and lining.

  According to the 2nd invention, lining construction can be performed, moving a work floor.

  ADVANTAGE OF THE INVENTION According to this invention, the moving method of the work floor in a vertical shaft or an inclined shaft excellent in workability | operativity, and the lining construction method using the same can be provided.

(A), (b) is a figure which shows the process excavated toward lower space. (A), (b) is a figure which shows the process excavated toward lower space. (A) is a figure which shows the state where the shaft 17 was excavated, (b) is a figure which shows the state which filled the backfill material 27 in the shaft 17. (A) is a figure which shows the state which constructs the lining 29 from the upper direction of the shaft 17, (b) shows the state which discharges a part of backfill material 27 to the downward space 3, and also constructs the lining 29 Figure. (A), (b) is a figure which shows other embodiment. The figure which shows other embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the process of constructing a shaft will be described. In the following description, an example of a vertical shaft will be described, but the present invention can also be applied to a tilt shaft.

  First, as shown in FIG. 1A, the excavator 5 is installed on the ground 1. Below the excavator 5, a lower space 3 such as a tunnel constructed separately is formed. The lower space 3 is constructed by a known method. The upper ground 1 may be the ground or the ground in a mine shaft. In the present invention, the method is particularly suitable when the space above the ground 1 is limited.

  A pilot bit 9 is provided at the tip of the rod 7 of the excavator 5. The excavator 5 excavates from the upper side to the lower side using the pilot bit 9 (arrow A in the figure). The diameter of the pilot bit 9 is substantially the same as the diameter of the rod 7.

  When excavation to the lower space 3 is performed by the pilot bit 9, the pilot bit 9 is then replaced with the diameter-expanding bit 11 as shown in FIG. The diameter-expanding bit 11 is larger in diameter than the pilot bit 9 and corresponds to the outer diameter of a stabilizer described later.

  After exchanging to the expanded bit 11, excavation is performed from below to above by the excavator 5 (arrow B in the figure). At this time, the excavated soil falls into the lower space 3. For this reason, excavated soil is discharged from the lower space 3.

  When excavation is completed to the upper side by the diameter expansion bit 11, a stabilizer 13 is attached to the rod 7 instead of the diameter expansion bit 11 as shown in FIG. The stabilizer 13 serves as a reinforcing member during excavation by a reaming bit described later. After the stabilizer 13 is attached, the stabilizer 13 is moved to the lower space (arrow C in the figure).

  When the tip of the stabilizer 13 reaches the lower space 3, the reaming bit 15 is attached to the tip of the stabilizer 13 as shown in FIG. The reaming bit 15 is a member that performs excavation to the final shaft diameter.

  The excavator 5 excavates from the lower space 3 upward using the reaming bit 15 (arrow D in the figure). As described above, since the excavated soil falls into the lower space 3, the excavated soil is discharged from the lower space 3.

  Thus, the shaft 17 as shown in FIG. In addition, the construction method of the shaft 17 is not restricted to the raise boring method mentioned above, You may use any well-known method.

  Next, as shown in FIG. 3B, the pipe 19 is disposed on the shaft 17. A partition wall 23 is installed below the shaft 17 (in the vicinity of the boundary with the lower space 3). The pipe 19 is arranged straight along the shaft 17 and the lower end penetrates the partition wall 23.

  From this state, the backfill material 27 is filled into the shaft 17. The backfill material 27 is filled up to the vicinity of the ground 1 in the shaft 17. The backfill material 27 is preferably, for example, gravel with an adjusted particle size. For example, if a backfilling material whose particle size is adjusted to about 5 to 15 mm is used, it is possible to suppress the backfilling material 27 from being hardened in the shaft 17. Further, as will be described later, when the backfill material 27 is put into the pipe 19, clogging in the pipe 19 can be suppressed. For example, the maximum particle size of gravel used for the backfill material needs to be smaller than the diameter of the pipe 19, and is preferably less than half the diameter of the pipe 19 in order to prevent the pipe from being blocked. Moreover, since the compaction degree of the backfill material can be adjusted by adjusting the particle size distribution, it is preferable to adjust the particle size suitable for the stability as the work floor and the ease of excavation at the time of removal.

  The upper surface of the backfill material 27 functions as the work floor 25. That is, the lining device 21 can be installed on the work floor 25, and the operator can operate the lining device 21 on the work floor 25.

  FIG. 4A is a diagram showing a state in which the lining 29 is formed on the wall surface of the shaft 17 using the lining device 21. Thus, in this embodiment, the lining 29 can be sprayed on the wall surface of the shaft 17 exposed above the backfill material 27 using the lining device 21 installed on the work floor 25.

  When the predetermined range of lining 29 is applied, next, as shown in FIG. 4B, a part of the upper portion of the backfill material 27 is excavated, and the excavated backfill material 27 is inserted from the upper end of the pipe 19. (Arrow E in the figure). The backfill material 27 put into the pipe 19 is sent out to the lower space 3 through the pipe 19 (arrow F in the figure). The backfill material 27 discharged to the lower space 3 is transported from the lower space 3 by a truck or the like and discharged to the outside (arrow H in the figure).

  Thus, since the backfill material 27 is excavated upward and sent downward through the pipe 19, the upper surface position of the backfill material 27 moves downward by the excavated backfill material 27. That is, the work floor 25 moves downward (arrow G in the figure).

  The pipe 19 exposed on the work floor 25 is removed to a predetermined length as the work floor 25 moves. For example, if the pipe 19 is a joint pipe, a part of the pipes may be sequentially removed, or the pipes 19 may be sequentially cut to a predetermined length.

  Further, when excavating the backfill material 27, the lining device 21 is temporarily removed, and excavation is performed by a backhoe (not shown) or the like. After excavation of the predetermined amount of backfill material 27 is completed and the work floor 25 is moved downward by a predetermined amount, the lining device 21 is installed on the work floor 25 again.

  In this state, the lining 29 is applied to the wall surface again. Thus, the movement of the work floor 25 and the construction work of the lining 29 are repeated, and wall surface lining can be performed from the upper side of the shaft 17 to the lower side.

  As described above, according to the present embodiment, a part of the backfill material 27 is sent downward through the pipe 19 from above the work floor 25 to move the work floor 25 downward, so that the backfill material is excavated. Thus, it is not necessary to discharge upward. Moreover, since the lining apparatus 21 is installed in the work floor 25, it is not necessary to perform lining construction, hanging down from upper direction. Therefore, the work can be easily performed even in a place where the upper work space is restricted.

  Further, since the worker can work on the work floor 25, unstable work on the suspended equipment is not necessary. For this reason, lining construction can be performed safely and efficiently.

  Moreover, since the backfill material 27 is sent out downward through the pipe 19, the movement amount of the work floor 25 can be easily adjusted. In particular, when the backfill material 27 having an adjusted particle size is used, excavation is easy and the work floor 25 can be easily moved.

  The backfill material 27 discharged to the lower space 3 is then discharged to the outside and can be used as a raw material or the like when performing the lining 29.

  Next, a second embodiment will be described. In the following description, the same reference numerals as those in FIGS. 1 to 4 are given to the configurations and processes that exhibit the same functions as those in the first embodiment, and redundant descriptions are omitted.

  In the first embodiment, the partition wall 23 is formed at the lower end of the shaft 17 and in the vicinity of the boundary with the lower space 3, but the partition wall 23 is formed inside the lower space 3 as shown in FIG. You may arrange in. That is, the partition wall 23 may be inside the shaft 17 or inside the lower space 3.

  In this case, the lower end of the pipe 19 is bent to penetrate the partition wall 23. In this state, when the backfill material 27 is introduced from above the pipe 19 (arrow I in the figure), the backfill material 27 can be discharged from the lower end of the pipe 19 to the lower space 3 (arrow J in the figure). For this reason, the work floor 25 can be moved downward (arrow K in the figure).

  According to the second embodiment, an effect similar to that of the first embodiment can be obtained. Thus, the installation position of the partition wall 23 and the form of the pipe 19 are not limited to the illustrated example, and the same effect can be obtained with any form.

  Next, a third embodiment will be described. In the third embodiment, as shown in FIG. 5B, the pipe 19 is not used, and the opening / closing lid 31 is provided on the partition wall 23. By opening the opening / closing lid 31, the backfill material 27 is discharged into the lower space (arrow M in the figure). Thereby, the work floor 25 can be moved downward (arrow N in the figure). In addition, the installation position of the partition wall 23 may be any position as described above.

  According to the third embodiment, the same effect as that of the first embodiment can be obtained. Thus, the pipe 19 is not necessarily required, and if the part of the backfill material 27 can be removed from the lower space 3 of the shaft 17 and the work floor 25 can be moved downward, the first embodiment and the first embodiment can be used. Similar effects can be obtained.

  Next, a fourth embodiment will be described. In the fourth embodiment, as shown in FIG. 6, the partition wall 23 is not used, and the backfill material 27 is held in a state of flowing out into the lower space 3. Since the backfill material 27 receives a flow resistance when flowing into the lower space 3, the backfill material 27 is held at a certain position even without a partition wall. From this state, a part of the backfill material 27 is sequentially discharged from the lower space (arrow Q in the figure), so that the work floor 25 can be moved downward (arrow P in the figure).

  According to the fourth embodiment, the same effect as that of the first embodiment can be obtained. As described above, the partition wall 23 is not necessarily required. If the backfill material 27 is partially removed from the lower space 3 of the shaft 17 and the work floor 25 can be moved downward, the first embodiment and the first embodiment can be used. Similar effects can be obtained.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, in the above-described embodiment, the shaft 17 is first excavated and then the backfill material 27 is filled, but there is a method in which the backfill material 27 is not used. For example, first, the pipe 19 is driven from the ground 1 toward the lower space. From this state, excavation is performed from above, and the excavated soil is sent out to the lower space 3 by the pipe 19. In this way, it is also possible to perform the wall lining construction while moving the work floor 25 downward while digging.

1 ……… Ground 3 ……… Lower space 5 ……… Excavator 7 ……… Rod 9 ……… Pilot bit 11 ……… Expansion bit 13 ……… Stabilizer 15 ……… Reaming bit 17 ……… Vertical shaft 19 ......... Pipe 21 ......... Lining device 23 ......... Partition wall 25 ......... Work floor 27 ......... Backfill material 29 ......... Line lining 31 ......... Opening and closing lid

Claims (4)

A method for moving a work floor in a vertical or inclined shaft,
Filling a vertical shaft or inclined shaft with a backfill material, and using the upper surface of the backfill material as a work floor;
Removing a part of the backfill material from the space below the vertical shaft or the inclined shaft, and moving the work floor downward; b
A method for moving a work floor in a vertical shaft or a tilt shaft. Before the step a, a pipe is installed in the shaft or inclined shaft,
In the step b, the part of the backfill material is sent downward through the pipe from above the work floor, and the work floor is moved downward. How to move the work floor.   The method for moving a work floor in a vertical shaft or a tilt shaft according to claim 1, wherein the backfill material is gravel having an adjusted particle size. Utilizing the moving method of the work floor in the vertical shaft or inclined shaft according to any one of claims 1 to 3,
A lining device is installed on the work floor, and the lining construction is performed on the wall of the vertical shaft or inclined shaft.
The method of lining construction of a shaft or slope shaft, wherein the movement of the work floor and the lining construction are repeated, and wall surface lining is performed from the upper side to the lower side of the shaft or slope shaft.

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