JP5658603B2 - Filling material placement system and placement method in marginal depth disposal pit - Google Patents

Description

  The present invention relates to a filling material placing system and a placing method in a margin depth disposal pit.

  The marginal depth disposal facility is a facility for burying low-level radioactive waste having a relatively high radioactive concentration. For example, the waste is buried in a disposal cavity excavated to a depth of about 50 m underground. . Waste is stored in a square container and placed in a disposal pit, stacked vertically and horizontally in multiple rows and stages. A shielding body is formed around the rectangular container by fillers (filling mortar and upper shielding concrete) to shield radiation.

  By the way, the filling work of the filling material is a work in the state where the radioactive waste that has been placed is exposed. is there. A conventionally proposed filling operation is to provide a pipe extending from a safe area to a disposal pit, and pump the filler with a high-pressure pump (see, for example, Patent Document 1).

JP 2002-340993 A

  However, in the above-described filling method, a large number of pipes are arranged in a limited space of the disposal cavity, so that piping construction is complicated and there is a possibility that the filling material may be blocked at the time of pumping, and long distance pumping is performed. Therefore, there is a problem that the load on the pump and the piping is large and a special vehicle and high-pressure piping are required. Further, it is considered that there is a problem that the fresh property of the filler is changed by long-distance pumping.

  From this point of view, the present invention provides a filling material placing system and a placing device in a marginal depth disposal pit that has a simple structure and can place the filling material by short-distance transfer and can suppress changes in the fresh properties of the filling material. It is an object to provide a method.

In order to solve such a problem, the invention according to claim 1 is characterized in that filling mortar is placed in a gap around a radioactive waste container juxtaposed in a disposal pit of a surplus depth disposal facility provided in a tunnel. A surplus depth disposal pit filling material placement system for placing shielding concrete on the upper part of the container, the traveling carriage capable of traveling in the tunnel axial direction on the disposal pit, and the traveling carriage And a control device that remotely controls the operation of each part, and the control device travels the traveling carriage at a desired tunnel axial position. a running instruction unit which comprises a switching instruction unit for opening and closing said closing valve in accordance with the striking amount of the said filling mortar or the shielding concrete, the open-close valve, the tunnel width The container is arranged so that a lattice-shaped gap is formed around the container, and the container extends in the tunnel width direction and extends in the tunnel axial direction. When the plurality of gaps arranged at intervals are set to Xn patterns in order from one end, the control device transfers the filling mortar to the Xn patterns in which n is an odd number from one end to the other end in the tunnel axis direction. So that n is sequentially placed in the even numbered Xn direction from the other end portion in the tunnel axis direction toward the one end portion, or n from the one end portion in the tunnel axis direction toward the other end portion. After sequentially placing the even numbered Xn streets, the traveling carriage is moved and the opening / closing is performed so that n is sequentially placed from the other end portion in the tunnel axis direction to one end portion in the odd numbered Xn streets. opening and closing the valve Preparative a depth disposal pit filler striking setting system according to claim.

According to such a configuration, if the traveling carriage is moved up to the placement position and the on-off valve is opened, the filling mortar and the shielding concrete can be dropped from the placement bucket at a short distance and placed. Changes in fresh properties of (filled mortar and shielding concrete) can be suppressed. In addition, since a long distance pipe is not required unlike the prior art, the structure of the apparatus is simplified, and the cost and maintenance burden can be reduced. Furthermore, since the filled mortar is placed in a well-balanced manner, the flatness can be increased without leveling the surface of the placed filled mortar.

  Further, among the gaps, when the plurality of gaps extending in the tunnel axis direction and arranged at intervals in the tunnel width direction are set to Ym in order from one end, the filling mortar includes the Xn ways and the plurality of the mortars. It is preferable to drive from each intersection with Ym.

  According to such a configuration, since the filling mortar directly spreads from the placement position to both Xn and Ym, the flatness of the surface of the filling mortar can be further enhanced.

Further, it is preferable to further include a finisher disposed across the disposal pit and movable in the tunnel axis direction, and the control device moves the finisher after the placement of the shielding concrete is completed.

  According to such a configuration, the flatness of the surface of the shielding concrete can be increased by the finisher.

  Furthermore, the invention according to claim 5 is a method in which a filling mortar is placed in a gap around a radioactive waste container juxtaposed in a disposal pit of a surplus depth disposal facility provided in a tunnel, and the upper portion of the container A marginal depth disposal pit filling material placing method for placing shielding concrete on the container, wherein the containers are arranged so that a lattice-like gap is formed around the container, and the tunnel width of the gap is formed. A driving bucket provided on a traveling carriage capable of traveling on the disposal pit in the tunnel axis direction when a plurality of gaps extending in the direction and arranged at intervals in the tunnel axis direction are Xn in order from one end. When the filling mortar is placed in the gap, the filling mortar is sequentially placed in the Xn way where n is an odd number or an even number from one end to the other end in the tunnel axis direction. A margin depth disposal pit comprising a placing step and a filler second placing step that is sequentially placed in the Xn ways not yet placed from the other end in the tunnel axial direction toward the one end. This is an inner filler casting method.

  According to such a method, filling mortar and shielding concrete can be dropped and placed from a placing bucket at a short distance, so that a change in fresh properties of the filler (filling mortar and shielding concrete) can be suppressed. In addition, since a long distance pipe is not required unlike the prior art, the structure of the apparatus is simplified, and the cost and maintenance burden can be reduced. Further, since the filled mortar can be placed in the gap with a good balance, the flatness can be increased without leveling the surface of the placed filled mortar.

  Further, in the present invention, when the plurality of gaps extending in the tunnel axis direction and arranged at intervals in the tunnel width direction among the gaps are Ym in order from one end, the filler first placing step And in the second filling material placing step, the filling mortar is placed from each intersection of the Xn ways and the plurality of Ym ways.

  According to such a method, since the filling mortar spreads directly from the placement position to both Xn and Ym, the flatness of the surface of the filling mortar can be further enhanced.

  Further, the present invention provides a finishing step in which the finisher disposed across the disposal pit is moved in the tunnel axial direction after the placement of the shielding concrete is completed, and the surface of the shielding concrete is leveled and flattened. It is further provided with a feature.

  According to such a method, the flatness of the surface of the shielding concrete can be increased by the surface finishing by the finisher.

  According to the present invention, it is possible to place the filler with a simple structure and transfer over a short distance, and the excellent effect of not changing the fresh properties of the filler is exhibited.

It is sectional drawing which cut the tunnel in the width direction. It is sectional drawing which cut the tunnel in the axial direction. It is the top view which showed the disposal pit in a tunnel. It is the schematic block diagram which showed the placement apparatus of the placement system. It is the schematic block diagram which showed the flat finishing apparatus of the placement system. It is sectional drawing of the tunnel which showed the casting process of filling mortar. It is sectional drawing of the tunnel which showed the flat finishing process of shielding concrete. It is the enlarged plan view which showed the parallel state of the container in a disposal pit. It is the top view which showed the measuring point of the filling height of the filling mortar in a placement test. It is the top view which showed the measuring point of the surface height of the shielding concrete in a placement test. It is a top view for demonstrating the placement procedure of the 1st test of the filling mortar in a placement test. It is the contour figure which showed the filling height of the 1st test of the filling mortar in a placement test. It is a top view for demonstrating the placement procedure of the 2nd test of the filling mortar in a placement test. It is the contour figure which showed the filling height of the 2nd test of the filling mortar in a placement test. It is a top view for demonstrating the placement procedure of the 3rd test of the filling mortar in a placement test. It is the contour figure which showed the filling height of the 3rd test of the filling mortar in a placement test. It is a top view for demonstrating the surface finishing procedure of the 1st test of the shielding concrete in a placement test. It is the contour figure which showed the surface height of the 1st test of the shielding concrete in a placement test. It is a top view for demonstrating the surface finishing procedure of the 2nd test of the shielding concrete in a placement test. It is the contour figure which showed the surface height of the 2nd test of the shielding concrete in a placement test. It is a top view for demonstrating the surface finishing procedure of the 3rd test of the shielding concrete in a placement test. It is the contour figure which showed the surface height of the 3rd test of the shielding concrete in a placement test.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. The filling material placement system in the marginal depth disposal pit according to the present embodiment is a container for radioactive waste when burying radioactive waste in a tunnel (disposal cavity) excavated to a marginal depth deeper than about 50 m underground. For placing filling mortar and shielding concrete around.

  As shown in FIG. 1, in the tunnel 1, the back material layer 2 (reinforced concrete), the bottom material 3 a of the buffer material layer 3 (bentonite), the low diffusion material layer 5 (mortar) from the bottom and sides to the inside. ), The bottom 6a and the side wall 6b of the reinforced concrete disposal pit 6 are constructed, and the side 5b of the low diffusion material layer 5 is constructed. The backfill material layer 2, the bottom 3a of the buffer material layer 3, the bottom 5a and the side 5b of the low diffusion material layer 5 (mortar), and the bottom 6a and the side wall 6b of the disposal pit 6 are open. Built. A plurality of radioactive waste containers 7 are juxtaposed inside the bottom 6a and the side wall 6b of the disposal pit 6. The container 7 is configured by a rectangular parallelepiped rectangular container, and a gap is formed between the inner wall of the disposal pit 6 and the adjacent container 7. The containers 7 are placed in a plurality of rows vertically and horizontally and stacked in a plurality of stages vertically. The gap is filled with a filling mortar 8. When the filling mortar 8 is filled to the upper end height of the container 7, the shielding concrete 9 is placed so as to cover the container 7 and the filling mortar 8, and the shielding layer 10 is constructed. If the shielding layer 10 is constructed, the top plate portion 6c of the disposal pit 6 is constructed on the upper part thereof. Thereafter, the side portion 3b of the buffer material layer 3, the upper portion 5c of the low diffusion material layer 5, and the upper portion 3c of the buffer material layer 3 are sequentially constructed, and the upper backfill material layer 2c (cement or soil type) is constructed thereon. Is done.

  2 and 3 show a state in which the bottom 6a and the side wall 6b of the disposal pit 6 are constructed and the upper part is opened. As shown in the figure, the tunnel 1 in which the disposal pit 6 is provided is constructed by branching from a main tunnel 11. A plurality of tunnels 1 are formed in parallel at predetermined intervals. The main mine shaft 11 is constructed so as to have a bottom surface at a level equivalent to the top end of the shielding concrete 9 placed in the disposal pit 6. A mobile bucket 15 and a concrete finisher 16 are carried into the tunnel 1 from the main tunnel 11. On the side opposite to the main tunnel 11 of the tunnel 1, a connecting tunnel 12 is constructed and communicated. The connecting mine shaft 12 is constructed to have a bottom surface at a level equivalent to the bottom surface of the tunnel 1. From the connecting mine shaft 12, a concrete mixer truck (not shown) that transports the filling mortar 8, the shielding concrete 9, and the like is carried into the tunnel 1. At the end of the tunnel 1 on the side of the connecting mine shaft 12, a lifting platform 17 for moving the movable bucket 15 and the like is provided. After supplying mortar and concrete from the concrete mixer truck to the mobile bucket 15 at the level of the bottom of the tunnel 1, the mobile bucket 15 is transported to the upper stage by the lifting platform 17, and the filling mortar 8 and the shielding concrete 9 are placed. .

  The disposal pit 6 is divided into predetermined lengths in the axial direction of the tunnel 1. Adjacent disposal pits 6 are defined by side wall portions 6b extending in the tunnel width direction. Guide rails 18 extending in the tunnel axis direction are laid on the upper end surfaces of the side wall portions 6b on both sides of the disposal pit 6 in the width direction. The guide rail 18 is formed to extend from the end portion on the main mine shaft 11 side to the lifting platform 17, and the movable bucket 15 and the concrete finisher 16 travel on the guide rail 18. Inside each disposal pit 6, a container 7 for storing radioactive waste is arranged in parallel. Since the worker cannot enter from the parallel work of the containers 7 until the disposal pit 6 is closed with the shielding concrete 9, the remote work is performed. In the tunnel 1, a disposal pit 6 and an openable / closable partition wall 19 for partitioning the main tunnel 11 and the connecting tunnel 12 are provided so as to sandwich the area of the disposal pit 6.

  The margin depth disposal pit filling material placing system includes a traveling carriage 20 that can travel on the disposal pit 6 in the tunnel axis direction, a placement bucket 21 disposed on the traveling carriage, and a finisher that can move in the tunnel axis direction. (Concrete finisher 16) and a control device 60 for remotely controlling the operation of each part. The traveling carriage 20 and the placing bucket 21 are constituent members of the movable bucket 15.

  As shown in FIG. 4, the traveling carriage 20 includes a frame 22 extending in the tunnel width direction and straddling the disposal pit 6, and a plurality of wheels 22 provided on the frame 22 and rotating on a guide rail 18 (see FIG. 3). It has. The frame 22 has a rectangular frame shape in plan view, a pair of wheel support portions 22a along the guide rail 18, and a pair of connection portions 22b arranged to connect the wheel support portions 22a and 22a. It consists of A plurality of wheels 23 are provided on each wheel support portion 22a. One of the plurality of wheels 23 (for example, a wheel at one end in the traveling direction) 23 is provided with an encoder (not shown) to measure the traveling position of the traveling carriage 20. Further, a spare encoder is attached to another wheel (for example, the wheel at the other end in the traveling direction) 23, and is used when the encoder fails. The connecting portion 22b is bridged between the pair of wheel support portions 22a. A pair of connecting portions 22b are provided before and after the traveling direction of the traveling carriage 20, and are arranged at a predetermined interval. The placing bucket 21 is disposed between the front and rear connecting portions 22b and 22b. A guide rail 24 extending in the longitudinal direction (tunnel width direction) is laid on each connecting portion 22b.

  In addition, a laser rangefinder 25 is provided on the connecting portion 22b to increase the position detection accuracy of the movable bucket 15, and consequently the placement position. The laser rangefinder 25 measures the distance only in a single direction, and is used after the traveling carriage 20 stops at a predetermined position, and finally corrects the measurement value error of the encoder due to the slip of the wheel 23 or the like. Further, the frame 22 is provided with an ID tag detection device 26, and the traveling of the traveling carriage 20 can also be detected by detecting an ID tag (not shown) that transmits position information provided in each part in the tunnel 1. The position is to be confirmed.

  The frame 22 is provided with a transceiver 38 that transmits and receives various signals. The transceiver 38 transmits the rotational speed data from the encoder provided on the wheel 23, the acquired data from the laser distance meter 25 and the ID tag detection device 26, and the like to the control device 60. Further, the transceiver 38 receives an operation signal (such as an operation signal of a motor provided on the wheel 23) transmitted from the control device 60.

  As shown in FIG. 6, the frame 22 is provided with a pantograph 43. The pantograph 43 is configured to receive power by contacting the underground power supply overhead line 41 laid on the side surface of the tunnel 1 and to supply power to each device of the mobile bucket 15.

  As shown in FIG. 4, the placing bucket 21 is supported by a wheel support frame 28 that travels on the guide rail 24, and is movable in the longitudinal direction of the connecting portion 22b. A pair of wheel support frames 28 are provided, and are arranged at a predetermined interval before and after the traveling direction of the traveling carriage 20. The wheel support frame 28 includes a plurality of wheels 27 that rotate on the guide rail 24. A plurality of wheels 27 are provided on each wheel support frame 28. The wheel 27 is provided with a motor and an encoder (not shown), and measures the position of the placing bucket 21 in the tunnel width direction. A spare encoder is also provided.

  The placement bucket 21 has a rectangular shape that is long in the tunnel width direction in plan view, and a pair of openings 29 are formed at the lower end thereof (see FIG. 3). The opening 29 is connected to a placement pipe 31 having an opening / closing valve 30. The downstream portion of the placement pipe 31 is formed of a flexible member so that the height of the placement point can be adjusted. Specifically, an insertion rod 32 is attached to the placement pipe 31, a wire 33 is connected to the downstream end thereof, and the wire 33 is wound up by the winch 34 so that the downstream end of the placement pipe 31 is pulled up. It has become. The winch 34 is supported by the wheel support frame 28 and moves in the tunnel width direction together with the placing bucket 21. The winch 34 is provided with a motor encoder (not shown), and the height position of the downstream end of the placement pipe 31 is adjusted by detecting and controlling the amount of winding of the winch 34.

  Above the wheel support frame 28, a video camera 35, a two-dimensional laser sensor 36, and a laser distance meter 37 are provided. The video camera 35 is a construction camera for confirming the operation of each part in remote operation. A plurality of video cameras 35 are fixed to both the wheel support frames 28, respectively, and are arranged so that the inside of the placement bucket 21, the placement state of the placement piping 31, the placement position, and the like can be photographed. ing. The two-dimensional laser sensor 36 is arranged toward the gap around the container 7 and is used for measuring the shape of the filled mortar 8. The two-dimensional laser sensor 36 is also fixed to the wheel support frame 28, and a plurality of test sections are acquired by moving the wheel support frame 28. The laser distance meter 37 is for measuring the position of the placing bucket 21 and is provided on both sides of the both wheel support frames 28 in the tunnel width direction. The laser distance meter 37 is arranged facing outward in the tunnel width direction, and measures the distance between the side walls of the tunnel 1.

  The wheel support frame 28 is provided with an antenna 39 that transmits and receives various signals. The antenna 39 controls various acquired data (rotational speed data from encoders provided on the wheels 27 and the winch 34, video data from the video camera 35 and the two-dimensional laser sensor 36, measurement data from the laser distance meter 37, etc.). To device 60. The antenna 39 also receives various operation signals transmitted from the control device 60 (operation signals of motors provided on the wheels 27, operation signals of the winch 34, opening / closing signals of the opening / closing valve 30, etc.).

  The concrete finisher 16 is for flattening the surface of the shielding concrete 9. As shown in FIG. 5, the concrete finisher 16 includes wheels 50 that rotate on the guide rail 18. The concrete finisher 16 is configured so that it can be remotely operated by providing a position measuring device and a transmitter / receiver of various signals to a known finisher in which a screed blade 57 in the shape of a soil discharge plate is mounted on the forward side in the traveling direction.

  Specifically, one of the plurality of wheels 50 is provided with an encoder (not shown), and the traveling position of the concrete finisher 16 is measured. Further, a spare encoder is attached to another wheel 50, and is used when the encoder fails. The concrete finisher 16 is provided with a video camera 51, a three-dimensional laser sensor 52, laser distance meters 53 and 54, and an ID tag detection device 55, respectively. The video camera 51 is arranged so as to be able to photograph the front and back of the concrete finisher 16 and is used for confirming the finished state of the surface of the shielding concrete 9. The three-dimensional laser sensor 52 is disposed toward the surface of the shielding concrete 9. The three-dimensional laser sensor 52 enables three-dimensional display by calculation, and is used for the finished shape inspection of the shielding concrete 9. The laser distance meter 53 is arranged facing the tunnel axis direction and measures the traveling position of the concrete finisher 16. The laser distance meter 54 is disposed facing outward in the tunnel width direction, and measures the distance between the side walls of the tunnel 1. The ID tag detection device 55 confirms the traveling position of the concrete finisher 16 by detecting an ID tag (not shown) that transmits position information provided in each part in the tunnel 1. The ID tag is the same as that for confirming the position of the mobile bucket 15.

  The concrete finisher 16 is provided with an antenna 56 for transmitting and receiving various signals. The antenna 56 controls various acquired data (rotational speed data from an encoder provided on the wheel 50, video data from the video camera 51 and the three-dimensional laser sensor 52, measurement data from the laser distance meters 53 and 54, and the like). 60. The antenna 56 receives various operation signals (such as an operation signal of a motor provided in the wheel 50 and an opening / closing signal of the opening / closing valve 30) transmitted from the control device 60.

  As shown in FIG. 7, the concrete finisher 16 is provided with a pantograph 44. The pantograph 44 receives power by making contact with the underground power supply overhead line 41 laid on the side surface of the tunnel 1 and supplies power to each part of the concrete finisher 16.

  As shown in FIGS. 4 and 5, the control device 60 is disposed away from the disposal pit 6 and is provided in a control room (not shown) for remote operation by an operator. The control device 60 includes a receiving unit (not shown), a display unit, an operation instruction unit, a transmission unit, and a storage unit. The control device 60 is configured by a microcomputer programmed so that the operation of each unit is appropriately performed. The receiving unit receives and displays the rotational speed data transmitted from the transmitter / receiver 38 of the mobile bucket 15 from the encoder provided on the wheel 23, the acquired data from the laser distance meter 25 and the ID tag detection device 26, and the like. To the department. In addition, the receiving unit transmits the rotation speed data transmitted from the antenna 56 of the concrete finisher 16 from the encoder provided on the wheel 50, the video data from the video camera 51 and the three-dimensional laser sensor 52, and the laser distance meters 53 and 54. Receives measurement data from and sends it to the display. In the display unit, the received various data is displayed on a display device such as a monitor, and the worker visually observes various states.

  The operation instructing unit creates a travel command for creating a travel command for causing the traveling carriage 20 to travel to a desired tunnel axial position, and an opening / closing command for opening and closing the opening / closing valve 30 in accordance with the amount of filling mortar 8 or shielding concrete 9 placed. An opening / closing instruction unit is provided. In addition, the operation support unit includes a movement instruction unit that creates a movement command for the placing bucket 21. Each of the above commands is sent to the transmission unit. In the storage unit, a placement position and placement order of the filling mortar 8 to be described later, a placement position and placement order of the shielding concrete 9, and a movement order of the concrete finisher 16 are input in advance. The operation instructing unit takes out various information from the storage unit, combines information on the placement position and the placement order, and transmits each operation command to the transmission unit. The transmission unit transmits an operation signal of a motor provided on the wheel 27 or the wheel 50 or an opening / closing signal of the opening / closing valve 30 based on the received operation command.

  A procedure for filling the filling mortar 8 into the gap around the container 7 arranged in parallel in the disposal pit 6 using the mobile bucket 15 will be described below. As shown in FIG. 8, the containers 7 are arranged in the disposal pit 6 so that a lattice-like gap is formed around them. Here, among the gaps, a plurality of gaps extending in the tunnel width direction and arranged at intervals in the tunnel axis direction are arranged in Xn ways (X1, X2, X3... In order from one end (the left end in FIG. 8). And a plurality of gaps extending in the tunnel axis direction and arranged at intervals in the tunnel width direction from one end (lower end in FIG. 8) to Ym (Y1, Y2, Y3...) In order. To do.

  When placing the filling mortar 8, the movable bucket 15 is moved to the level of the connecting tunnel 12 by the lifting platform 17, and the concrete pump is moved from the concrete mixer truck (not shown) carried from the connecting tunnel 12. Used to load the filling mortar 8 into the placing bucket 21. Thereafter, the lift 17 is raised and traveled on the disposal pit 6 to be placed. Then, after confirming the placement position based on the video of the video camera 35 and the measurement data of the laser distance meter 37, the winch 34 is rotated to feed the wire 33 and lower the placement pipe 31 to a predetermined height. Thereafter, the opening / closing valve 30 is opened, and the filling mortar 8 is placed in the gap. During the placement of the filling mortar 8, the remaining amount of the filling mortar 8 in the placement bucket 21 and the placement status are monitored by the video of the video camera 35. It should be noted that the same work process as described above is performed when placing the shielding concrete 9.

  Here, the placement position and placement order of the filling mortar 8 will be described. In the present embodiment, the filling mortar 8 is sequentially placed in an Xn way (X1, X3, X5...) Where n is an odd number from one end to the other end in the tunnel axis direction (first filling material placement). Step) After that, n that are not yet placed from the other end in the tunnel axial direction toward one end are sequentially placed in even-numbered Xn ways (X8, X6, X4...) (Filler second placing step). . That is, the filling mortar 8 is sequentially placed from one end to the odd numbered odd number Xn, from the small number Xn to the large number X (sequential placement by skipping one Xn), and then the filling mortar 8 Are sequentially placed from the other end side to even numbered X ways, from large Xn ways to small numbered Xn ways (unplaced Xn ways are sequentially placed one by one from the reverse direction). In this embodiment, even number Xn streets are placed after odd number Xn streets are placed first, but even number Xn streets are placed first and odd number Xn streets are placed later. You may make it do. Further, in this embodiment, the mobile bucket 15 is reciprocated once by including the filler first placing step and the filler second placing step. The three placing steps, the fourth filling step, etc. may be added as appropriate.

  On the Xn street, each intersection with a plurality of Ym streets is set as a placement position. In the present embodiment, intersections with Y2 street and Y5 street that enter one inside from Y1 street and Y6 street at both ends are set as the placement positions. That is, after sequentially placing from the intersection C1 to the intersection C4 located at two places shown in FIG. 8, the placement is performed in the order of the intersection C5 to the intersection C8. The placement position is not limited to the intersection of the Xn ways and the Y2 ways and the Y5 ways described above, and can be appropriately changed according to the width of the disposal pits 6 and the number of Ym ways. For example, it may be an intersection of Xn streets and the outermost Ym street, or an intersection of Ym streets that are two inward from both ends. Furthermore, in this embodiment, the placement position is the intersection of Xn streets and two Ym streets, but when there are many Ym streets, placement is performed at the intersections of three or more Ym streets. You may do it. The placement position is preferably the intersection of Xn and Ym in principle, considering the spread of the filling mortar 8, but is not necessarily limited to the intersection of Xn and Ym. You may drive in the groove part between intersections so that it can drive in a well-balanced direction in the tunnel width direction according to the number of places of an installation position. For example, when there are three placement positions in the gap shape of the present embodiment, there are two intersections of Xn, Y2 and Y5, and an intermediate point between Y3 and Y4 on Xn. Is the placement position.

  Next, the placement position and placement order of the shielding concrete 9 and the surface finish will be described. The shielding concrete 9 is also placed using the movable bucket 15. In the present embodiment, the shielding concrete 9 is moved from the Xn street (X8 street) at the other end (right end in FIG. 8) to the Xn street (X7 street) that enters one inside (on the left side in FIG. 8). To the end of each) in order for each Xn way. On the Xn street, intersections with the Ym street (Y2 street) and the Ym street (Y5 street) that enter one inside from the Ym street (Y1 street) and the Ym street (Y6 street) at both ends are set as the placement positions. (Shielding concrete placing process). In addition, the placement position and placement order of the shielding concrete 9 are not limited to this, and can be changed as appropriate.

  When the placement of the shielding concrete 9 is completed, the movable bucket 15 is moved onto the adjacent disposal pit 6 where the placement is not completed, and the concrete finisher 16 is moved onto the shielding concrete 9. In the finishing operation, the concrete finisher 16 is moved forward, and the front surface of the screed blade 57 is used to perform a push finish construction in which the surface of the shielding concrete is removed while being pushed (finishing step).

  According to the margin depth disposal pit filling material placing system configured as described above, the filling mortar 8 and the shielding concrete 9 are placed when the traveling carriage 20 is moved to the placement position and the opening / closing valve 30 is opened. Since it can be dropped and placed from the installation bucket 21 at a short distance, the moving distance of the filler (filled mortar 8 and shielding concrete 9) can be shortened. Therefore, the change of the fresh property of the filling mortar 8 can be suppressed. Further, according to the present embodiment, the mobile bucket 15, the concrete finisher 16, and the underground feed feeder 41 need only be provided in the tunnel 1, and a long-distance pipe is not required as in the prior art. Can be simplified and the cost and maintenance burden can be reduced. Moreover, since there are only two on-off valves 30, the risk of trouble occurrence is greatly reduced. Furthermore, it is possible to perform remote operation with high accuracy according to the construction situation by a measuring device such as a laser distance meter 37 and an encoder, and a monitoring device such as a video camera 35 and a two-dimensional laser sensor 36.

  In the present embodiment, since the filling mortar 8 is dispersed and placed over the entire plane of the disposal pit 6 little by little as described above, the filling mortar 8 is placed in a balanced manner in each gap. Even if the surface of the filled mortar 8 is not leveled, the flatness can be increased by the self-leveling effect.

  On the other hand, the shielding concrete 9 is lower in fluidity than the filling mortar 8, but the finish of the concrete finisher 16 after finishing the placement can improve the flatness of the surface of the shielding concrete 9.

Next, the confirmation experiment performed about the flatness of the filling mortar 8 and the shielding concrete 9 is demonstrated. In the confirmation test, an experiment (see FIG. 9) in which filling mortar was placed in the gap S formed in a lattice shape (see FIG. 9) and an experiment in which shielding concrete was placed in a frame of the same area (see FIG. 10) were performed. It was. Two buckets with a capacity of 2.0 m ³ were used as placement buckets. A 5-inch outlet is formed at the bottom of the bucket. The size of the radioactive waste container was set to 1.6 m × 1.6 m, and the gap S was formed. A simple finisher equipped with an engine-type vibrator was used as a concrete finisher.

  In the confirmation experiment of the filling mortar, the surface height of the filling mortar was measured at each intersection of Xn and Ym in FIG. The numbers in the circles at the intersections indicate the measurement points. In the confirmation experiment of the shielding concrete, the numbers in the circles of the intersections where the surface height of the shielding concrete was measured at the intersections of the street lines assembled in a lattice shape in FIG. 10 indicate the measurement points.

  The composition of the filling mortar and shielding concrete is as shown in Table 1 below. In addition, about the filling mortar, the high fluidity | liquidity shall be hold | maintained for 60 minutes in a high temperature environment in consideration that the radioactive waste generates heat.

  The confirmation test of the filling mortar was performed for the placing procedure of the three cases shown in FIGS. The placement order shown in FIG. 15 is the placement procedure of this embodiment. The placement procedure shown in FIGS. 11 and 13 is a comparative example.

In the first test of the filling mortar, the filling mortar was loaded into a bucket divided into two concrete mixer trucks. As shown in FIG. 11, the placing procedure starts with filling mortar loaded from the first concrete mixer truck at the intersection of X1 and Y2 and the intersection of X1 and Y4 (thick circle). Are placed at measurement points 5, 13) surrounded by 0.25 m ³ , then intersections of X3 and Y2 and intersections of X3 and Y4 (measurement points 7 and 15 surrounded by a thick square) ) to pouring by 0.25m ^3. When the placing of the measuring points 7 and 15 is completed, the filling mortar is loaded from the second concrete mixer truck, placed on the measuring points 5 and 13, and then placed on the measuring points 7 and 15.

  According to this first test, the surface of the filled mortar has a high shape around the finally placed measurement points 7 and 15 as shown in FIG. 12 after curing. Specifically, as shown in Table 2 below, when the filling mortar for the first concrete mixer truck has been placed, the average filling height is 157 mm, and the maximum value is 171 mm. The minimum value is 125 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 46 mm. When the filling mortar for the second concrete mixer is completely placed, the average value of the filling height is 316 mm, the maximum value is 330 mm, and the minimum value is 300 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 30 mm. Further, in the filled mortar after curing, the average value of the filling height is 315 mm, the maximum value is 329 mm, and the minimum value is 300 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 29 mm.

The second test of the filling mortar is divided into three concrete mixer trucks and loaded with the filling mortar in the bucket. As shown in FIG. 13, the placing procedure is as follows. First, the filling mortar loaded from the first concrete mixer truck is set at the intersection of the X1 street and the Y4 street (measurement point 13 surrounded by a thick circle). After placing 5 m ³ , 0.5 m ³ is placed at the intersection of X4 and Y2 (measurement point 8 surrounded by a thick square). After completing the pouring of the measurement points 8, loading the filled mortar from concrete mixer truck of Me two, after 1.0 m ³ strokes set to the measuring point 13, to 1.0 m ³ strokes set the measuring point 8. Thereafter, the third filling mortar is placed in the same manner as the second filling mortar.

  According to this second test, the surface of the filled mortar has a high shape around the finally placed measurement point 8 as shown in FIG. 14 after curing. Specifically, as shown in Table 3 below, when the filling mortar for the first concrete mixer truck has been placed, the average filling height is 153 mm, and the maximum value is 183 mm. The minimum value is 115 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 68 mm. When the filling mortar for the second concrete mixer is completely placed, the average value of the filling height is 460 mm, the maximum value is 474 mm, and the minimum value is 447 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 27 mm. When the filling mortar for the third concrete mixer is completely placed, the average filling height is 764 mm, the maximum value is 779 mm, and the minimum value is 751 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 28 mm. Further, in the filled mortar after curing, the average value of the filling height is 764 mm, the maximum value is 777 mm, and the minimum value is 751 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 26 mm.

The third test of the filling mortar is divided into three concrete mixer trucks, and the filling mortar is loaded into the bucket. As shown in FIG. 15, the placing procedure starts with filling mortar loaded from the first concrete mixer truck at the intersection of X1 street and Y2 street, and the intersection of X1 street and Y4 street (thick circle). Are placed at measurement points 5, 13) surrounded by 0.25 m ³ each, then the intersection of X3 and Y2 and the intersection of X3 and Y4 (measurement points 7, 15 surrounded by a thick circle) 0.25m ³ each. After the measurement points 7 and 15 have been placed, the filling mortar is loaded from the second concrete mixer truck, and the intersection of the X4 and Y2 streets and the intersection of the X4 and Y4 streets (enclosed by a thick square) After placing 0.25 m ³ each at measurement points 8 and 16), 0 is set at the intersection of X2 and Y2 and the intersection of X2 and Y4 (measurement points 6 and 14 surrounded by a thick square). Place 25m ³ each. Once the measurement points 6 and 14 have been placed, the filling mortar loaded from the third concrete mixer truck is crossed between the X1 and Y2 streets, and the X1 and Y4 streets (in bold circles) After placing 0.25 m ^{3 at the} surrounding measurement points 5 and 13), at the intersection of X3 and Y2 and the intersection of X3 and Y4 (measurement points 7 and 15 surrounded by thick circles) Place 0.25m ³ each.

  According to the third test, the surface of the filled mortar has a generally flat shape as shown in FIG. 16 after curing. Specifically, as shown in Table 4 below, when the filling mortar for the first concrete mixer truck has been placed, the average value of the filling height is 154 mm, and the maximum value is 175 mm. The minimum value is 137 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 38 mm. When the filling mortar for the second concrete mixer is completely placed, the average filling height is 476 mm, the maximum value is 485 mm, and the minimum value is 465 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 20 mm. When the filling mortar for the third concrete mixer is completely placed, the average filling height is 804 mm, the maximum value is 809 mm, and the minimum value is 796 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 13 mm. Further, in the filled mortar after curing, the average value of the filling height is 803 mm, the maximum value is 809 mm, and the minimum value is 798 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 11 mm.

  Comparing the results of the first test to the third test of the above filled mortars, in any case, the maximum level difference after curing is within the range of the average value ± 2 cm. ing. Among them, as in the third test corresponding to the present embodiment, a large number of placement points are set, and a small amount is placed, and one is thrown along Xn. It was confirmed that the maximum level difference after curing was 11 mm and the minimum value by driving one by one in the street. That is, it was confirmed that the placement procedure of this embodiment can improve the self-leveling property compared to the comparative example. For filling mortar, depending on the required level of flatness of the surface after finishing after curing, determine whether to place importance on flatness or the rationality of construction, and select the placement procedure as appropriate. Therefore, more rational construction is possible.

  The confirmation test of the shielding concrete was performed for the placing procedure and finishing procedure of the three cases shown in FIGS. The case shown in FIG. 19 is the finishing procedure for the concrete finisher of this embodiment.

The first test of shielding concrete is divided into four concrete mixer trucks and the shielding concrete is loaded into the bucket. As shown in FIG. 17, the placement procedure is as follows. First, the shielding concrete loaded from the first concrete mixer truck is placed 0.5 m ³ at measurement points 9 and 19 surrounded by a thick circle, and Da設by 0.5 m ³ to the measurement points 8, 18 enclosed by a thick line square, further pouring by 0.5 m ³ to the measurement points 7, 17 enclosed by a thick line triangle. After that, shielding concrete is loaded from the second concrete mixer truck, and 0.67 m ³ is placed at each point in the order of measurement points 9 and 19, measurement points 8 and 18, and measurement points 7 and 17. The shielding concrete from the third concrete mixer truck is placed in the same order and placement amount as the second concrete mixer truck. The shielding concrete from the fourth concrete mixer truck is placed in the same order and placement amount as the first concrete mixer truck. When the shielding concrete has been placed, the concrete finisher is retracted from the measuring points 7 and 17 toward the measuring points 9 and 19 and pulled by using the rear surface of the screed blade in the shape of the earth plate attached to the forward side. While doing the finishing work to finish the surface of the shielding concrete.

  According to the first test, the surface of the shielding concrete, after finishing, as shown in FIG. 18, the point where the placing order is slow and the point on the downstream side in the moving direction of the concrete finisher are high, and the middle portion between them Is low. Specifically, as shown in Table 5 below, when the placement of the shielding concrete for the first concrete mixer truck is completed, the average value of the surface height is 108 mm, and the maximum value is 132 mm. The minimum value is 66 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 66 mm. Hereinafter, when the placement of the shielding concrete for the second, third, and fourth concrete mixer trucks is completed, the maximum level differences are 43 mm, 48 mm, and 94 mm, respectively. After finishing by the concrete finisher, the average value of the surface height is 524 mm, the maximum value is 540 mm, and the minimum value is 506 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 34 mm.

In the second test of shielding concrete, the shielding concrete is loaded into a bucket divided into three concrete mixer trucks. As shown in FIG. 19, first, after placing the shielding concrete loaded from the first concrete mixer truck at measuring points 7 and 17 surrounded by a thick circle, 0.5 m ³ each, and Da設by 0.5 m ³ to the measurement points 8, 18 enclosed by a thick line square, further pouring by 0.5 m ³ to the measuring points 9 and 19 enclosed by a thick line triangle. After that, shielding concrete is loaded from the second concrete mixer truck, and 0.67 m ³ is placed at each point in the order of measurement points 9 and 19, measurement points 8 and 18, and measurement points 7 and 17. The shielding concrete from the third concrete mixer truck is placed in the same order as the first one by 0.67 m ^{3 at} each point. When the placement of the shielding concrete is completed, the concrete finisher is advanced in the direction from the measurement points 9 and 19 to the measurement points 7 and 17, and using the front surface of the screed blade in the shape of the earth plate attached to the advance side, A push finish construction is performed to finish off the surface of the shielding concrete while pushing.

  According to the second test, the surface of the shielding concrete is generally flat as a whole as shown in FIG. 20 after finishing. As shown in Table 6 below, the specific values are as follows. When the placement of the shielding concrete for the first concrete mixer truck is completed, the average value of the surface height is 490 mm, and the maximum value is 511 mm. The minimum value is 439 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 72 mm. Hereinafter, the maximum level difference is 56 mm and 75 mm when the placement of the shielding concrete for the second and third concrete mixer trucks is completed. After finishing by the concrete finisher, the average value of the surface height is 756 mm, the maximum value is 770 mm, and the minimum value is 736 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 34 mm. The average value of the surface height after curing is 756 mm, the maximum value is 768 mm, and the minimum value is 718 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 50 mm.

In the third test of shielding concrete, the shielding concrete is loaded into a bucket divided into seven concrete mixer trucks. As shown in FIG. 21, after placing the shielding concrete loaded from the first concrete mixer truck into measurement points 9 and 19 surrounded by a thick circle, 0.5 m ³ each, and Da設by 0.5 m ³ to the measurement points 8, 18 enclosed by a thick line square, further pouring by 0.5 m ³ to the measuring points 9 and 19 enclosed by a thick line triangle. After that, shielding concrete is loaded from the second concrete mixer truck, and 0.67 m ³ is placed at each point in the order of measurement points 9 and 19, measurement points 8 and 18, and measurement points 7 and 17. The shielding concrete from the third to sixth concrete mixer trucks is also placed in the same order and placement amount as the second. The shielding concrete from the seventh concrete mixer truck is placed in the same order and placement amount as the first. When the placement of the shielding concrete is completed, the concrete finisher is retracted in the direction from the measurement points 7 and 17 toward the measurement points 9 and 19 and then the drawing finish construction is performed, and then the measurement points 9 and 19 to the measurement points 7 and 7 are performed. It pushes forward in the direction toward 17 and performs push finish construction. In this test, re-vibration finishing was performed experimentally on the right half of FIG.

  According to the third test, the surface of the shielding concrete is generally flat as shown in FIG. 22 after finishing. Specifically, as shown in Table 7 below, the average value of the surface height is 116 mm and the maximum value is 139 mm when the placement of the shielding concrete for the first concrete mixer truck is completed. The minimum value is 69 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 70 mm. In the following, when the placement of the shielding concrete for the second to seventh concrete mixer trucks is completed, the maximum level differences are 126 mm, 76 mm, 91 mm, 55 mm, 56 mm, and 60 mm, respectively. After the drawing finish by the concrete finisher (after finishing 1), the average value of the surface height is 1008 mm, the maximum value is 1026 mm, and the minimum value is 968 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 58 mm. After the push finish by the concrete finisher (after finishing 2), the average value of the surface height is 1006 mm, the maximum value is 1017 mm, and the minimum value is 971 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 46 mm. After re-vibration finishing (3 after finishing), the average value of the surface height is 1007 mm, the maximum value is 1017 mm, and the minimum value is 971 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 46 mm. The average value of the surface height after curing is 1005 mm, the maximum value is 1016 mm, and the minimum value is 978 mm. The maximum level difference obtained by subtracting the minimum value from the maximum value is 38 mm.

  Comparing the results of the first test to the third test of the above shielding concrete, the maximum level difference before finishing was large in the range of about 50 to 100 mm in any case. This is thought to be because the shielding concrete is inferior in fluidity as compared with the filling mortar. Moreover, when flat finishing using a concrete finisher was performed, the maximum level difference was 50 mm or less, and it was confirmed that a finishing effect was obtained. As for the difference in flat finishing properties due to the difference in finishing procedure, in all cases, the result that the maximum level difference was generally below the allowable value was obtained, but the front surface of the screed blade in the shape of the earth plate attached to the forward side It was found that the properties of the push finish construction (second test) finished so as to peel off the surface of the shielding concrete while pushing were the best.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in this embodiment, the concrete finisher 16 is provided separately from the movable bucket 15, but the finish of the shielding concrete 9 is finished by attaching the finisher to the movable bucket 15 and running the traveling carriage 20. You may make it perform.

  In the present embodiment, the placing bucket 21 can be moved in the tunnel width direction with respect to the traveling carriage 20, but is not limited thereto, and may be fixed to the traveling carriage 20. In this case, the openings of the placement buckets are arranged in a well-balanced manner in the tunnel width direction according to the number of the placement buckets.

DESCRIPTION OF SYMBOLS 1 Tunnel 6 Disposal pit 7 Container 8 Filling mortar 9 Shielding concrete 16 Concrete finisher 20 Traveling carriage 21 Placing bucket 30 Opening and closing valve 60 Control device

Claims (6)

A margin for placing filling mortar in gaps around radioactive waste containers paralleled in a disposal pit of a margin depth disposal facility provided in the tunnel, and further placing shielding concrete on the top of the container A filling material placing system in a depth disposal pit,
A traveling carriage capable of traveling in the tunnel axial direction on the disposal pit, a driving bucket disposed on the traveling carriage and provided with an opening / closing valve at a lower end, and a control device for remotely operating each part. And
The control device includes a traveling instruction unit that causes the traveling carriage to travel to a desired tunnel axial position, and an opening / closing instruction unit that opens and closes the opening / closing valve in accordance with the amount of the filling mortar or the shielding concrete. And
A plurality of the opening and closing valves are provided at intervals in the tunnel width direction,
The containers are arranged so that a lattice-like gap is formed around them.
Among the gaps, when a plurality of gaps extending in the tunnel width direction and arranged at intervals in the tunnel axis direction are Xn in order from one end,
The controller sequentially places the filling mortar from one end portion in the tunnel axis direction toward the other end portion in the Xn way, where n is an odd number, and then n from the other end portion in the tunnel axis direction toward the one end portion. From the other end of the tunnel axis after n is sequentially driven from the one end portion in the tunnel axis direction toward the other end portion. The surplus depth disposal pit filling material placing system, wherein the traveling carriage is moved and the opening and closing valve is opened and closed so that n is sequentially placed in the odd numbered Xn direction toward one end. Among the gaps, when a plurality of gaps extending in the tunnel axis direction and arranged at intervals in the tunnel width direction are set to Ym in order from one end,
The filling mortar is placed from the intersection of the Xn street and the plurality of Ym streets. The margin depth disposal pit filling material placement system according to claim 1. It further comprises a finisher arranged across the disposal pit and movable in the tunnel axis direction,
The said control apparatus moves the said finisher after completion of the placement of the said shielding concrete. The filling material placement system in the margin depth disposal pit of Claim 1 or Claim 2 characterized by the above-mentioned. A margin for placing filling mortar in gaps around radioactive waste containers paralleled in a disposal pit of a margin depth disposal facility provided in the tunnel, and further placing shielding concrete on the top of the container A method for placing a filler in a depth disposal pit,
The containers are arranged so that a lattice-like gap is formed around the container,
Among the gaps, when a plurality of gaps extending in the tunnel width direction and arranged at intervals in the tunnel axis direction are Xn in order from one end,
When the filling mortar is driven into the gap from a driving bucket provided on a traveling carriage capable of traveling in the tunnel axial direction on the disposal pit, the filling mortar is directed from one end to the other end in the tunnel axial direction. Filling material first placement step in which n is sequentially placed in the odd or even number Xn, and filling is sequentially performed in the non-placed Xn manner from the other end in the tunnel axis direction to one end. And a second material placing step. A filling material placing method in a surplus depth disposal pit. Among the gaps, when a plurality of gaps extending in the tunnel axis direction and arranged at intervals in the tunnel width direction are set to Ym in order from one end,
5. The filling mortar is placed from each intersection of the Xn ways and the plurality of Ym ways in the filler first placement step and the filler second placement step. 5. The filling material placing method in the marginal depth disposal pit described in 1. After the completion of the placement of the shielding concrete, it further comprises a finishing step in which a finisher arranged across the disposal pit is moved in the tunnel axial direction to level the surface of the shielding concrete and perform a flat finish. The method for placing a filler in the marginal depth disposal pit according to claim 4 or 5.

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