JP4626873B2 - Buffer construction device - Google Patents

Description

  The present invention relates to a shock absorber constructing device that constructs a shock absorber by compacting a soil material such as a bentonite soil material formed by mixing bentonite and sand.

  For example, radioactive waste generated from nuclear power plants is buried in a high-level radioactive waste disposal site in order to prevent environmental impact.

  For example, high-level radioactive waste disposal sites are installed in the main tunnels that reach the deep underground and have access tunnels that extend in the vertical direction, main tunnels that extend horizontally in a manner that communicates with the access tunnels, and so on. And a plurality of disposal holes for filling the radioactive waste. The disposal hole is formed, for example, by excavating a rock mass into a cylindrical shape.

  When radioactive waste is buried in a high-level radioactive waste disposal site, for example, molten glass and radioactive waste are mixed to form a cylindrical glass solidified body, and then the glass solidified body is a container. A waste body is formed in a cylindrical overpack, and the overpack prevents the groundwater from coming into contact with the vitrified body, and after protecting the vitrified body from external pressure such as ground pressure, the waste body is buffered. Fill the disposal hole through the body.

  The buffer is constructed so as to have elasticity and water impermeability by using a soil material such as bentonite-based soil material formed by mixing bentonite and sand and compacting the soil material. Such a shock absorber prevents the groundwater from coming into contact with the overpack, and when the disposal hole is deformed due to an external force such as an earthquake, the shock absorber is deformed according to the deformation of the disposal hole. The external force applied to the overpack is reduced, thereby reducing the possibility of the overpack being damaged.

  Conventionally, in the factory, the buffer body is formed by compressing a soil material, for example, to form a disk-shaped buffer block and a disk-shaped buffer block having a hole corresponding to the outer diameter of the overpack in the center. After that, in a high-level radioactive waste disposal site (original position), after putting a disk-shaped buffer block in the disposal hole, a plurality of disk-shaped buffer blocks having a hole in the center are put in the disposal hole, After the storage area for storing the waste body is formed by the hole, the waste body is put in the storage area, and then a disc-shaped buffer block is put in the disposal hole so as to close the storage area. A construction method has been considered (for example, Non-Patent Document 1).

  By the way, in the conventional soil material compaction device used for compacting the soil material when the soil material is backfilled in the tunnel, a plurality of rammers (compacting means) for compacting the soil material, and the above-mentioned Some have a support that supports the rammer. The support is formed in a cylindrical shape having an outer diameter that is the same as the inner diameter of the tunnel, and is arranged in the apparatus main body in a manner that can be rotated around the rotation axis, and the rammer is formed in a cylindrical shape. A plurality of the support members are arranged in a manner covering the entire surface of one side surface of the support member.

  In such a soil material compaction device, the soil material located on the rotation trajectory of the compacting means, that is, in a cross section with a tunnel, is rotated by rotating the support around the rotation axis while the compacting means is driven. The entire soil material can be compacted (for example, Patent Document 1).

JP 2000-291400 A Japan Nuclear Power Environment Organization, "Technology and safety of geological disposal of high-level radioactive waste", [online], [Searched on November 21, 2005], Internet <http://www.numo.or.jp/ siryou /〉

  By the way, when a buffer body is constructed with a plurality of buffer blocks as described above, it is inevitable that a gap is generated between the buffer block and the buffer block immediately after the construction, and water such as groundwater is evacuated from the gap. There is a risk of infiltration and leakage of water contaminated by radioactive waste. In addition, when the buffer block formed at the factory is transported to a high-level radioactive waste disposal site, cracks enter the buffer block, and water such as groundwater enters the buffer body through the cracks, and the radioactive waste Contaminated water may leak out.

  On the other hand, when constructing a buffer body by applying the soil material compaction apparatus described above to a high-level radioactive waste disposal site, a support body provided with a plurality of compaction means on the entire surface and a waste body are installed. Prepare a support with a plurality of compaction means on the entire surface avoiding the position. First, use the support with a plurality of compaction means on the entire surface to compact the soil material, then tighten A soil material placed on the side of the waste body using a support body on which the waste body is placed on the hardened soil material and a plurality of compacting means are provided on the entire surface avoiding the position where the waste body is placed After compacting, the buffer material is constructed by compacting the soil material so as to close the disposal hole using a support having a plurality of compaction means disposed on the entire surface.

  When the buffer body is constructed in this way, the support body in which a plurality of compaction means are arranged on the entire surface and the support body in which the plurality of compaction means are disposed on the entire surface avoiding the position where the waste body is installed are exchanged. Since it is necessary, there was a problem that work efficiency when constructing the buffer body was poor.

  The above-mentioned problem is not limited to the case where a buffer is constructed at a high-level radioactive waste disposal site. For example, when a buffer is constructed at a low-level radioactive waste disposal site, or a buffer is produced at an industrial waste disposal site. It may also occur when building a body.

  In view of the above circumstances, an object of the present invention is to provide a shock absorber construction device that can reduce the risk of water leaking from the shock absorber and improve the working efficiency when constructing the shock absorber.

In order to achieve the above object, the invention according to claim 1 of the present invention is characterized in that the compacting means is supported by supporting a compacting means on a support and rotating the support while the compacting means is driven. A shock absorber construction device that constructs a shock absorber by compacting a soil material located on the rotation locus of the support member, wherein the shock absorber is rotated between the support and the compacting means. clamping solid and first state where the rotation locus said clamping solid means is disposed relative to said support in a manner that covers the entire building region of the cushion means, cushion in the overall the building region is not constructed housing Displacement means for displacing to a second state in which a compaction means is arranged with respect to the support in a manner to secure an area is provided.

  According to a second aspect of the present invention, there is provided the shock absorber constructing apparatus according to the first aspect, wherein the displacement means is capable of swinging around the swing shaft with respect to the support body by attaching a plurality of the fastening means. And an arm member displacing means for displacing the fastening means relative to the support body between the first state and the second state by swinging the arm member. It is characterized by.

  A shock absorber construction device according to claim 3 of the present invention is the shock absorber construction device according to claim 1 or 2, wherein the compacting means includes a drive device main body, a rod member capable of extending and contracting with respect to the drive device main body, And a compaction member disposed at the tip of the rod member.

According to a fourth aspect of the present invention, there is provided a shock absorber constructing apparatus according to any one of the first to third aspects, wherein the support body is moved according to the compaction of the soil material, and the shock absorber is constructed. characterized by being arranged with soil material撒出means out seeded soil material while ensuring a space or housing area of the buffer body is not constructed in the building area.

According to the shock absorber construction device of the present invention, the rotation path of the compacting means accompanying the rotation of the support body covers the entire construction area of the shock absorber between the support body and the compacting means. Displacement between the first state in which the compaction means is disposed and the second state in which the compaction means is disposed with respect to the support in a manner that secures a storage region in which the buffer body is not constructed in the entire construction region. Therefore, if the disposition of the compaction means relative to the support is displaced to the first state by the displacement means, the soil material in the entire construction area of the buffer can be compacted and if ask the arrangement of the solid unit is displaced to the second state by the displacement means, it is possible to compacting soil material while ensuring a storage area in which the buffer member is not built into the entire building region. Therefore, since it is not necessary to replace the support when constructing the buffer body, it is possible to improve work efficiency when constructing the buffer body. Moreover, since the buffer material can be constructed integrally by compacting the soil material at the original position, the possibility of gaps being formed in the buffer material can be reduced even immediately after the construction, so that, for example, by radioactive waste The possibility of contaminated water leaking out of the buffer can be reduced.

Furthermore, the present invention is to scrape out the soil material while securing a moving means for moving the support according to the compaction of the soil material and a storage area where the buffer body is built or a buffer body is not built in the construction area. Soil material scouring means is disposed. Therefore, a certain amount of soil material per unit time is spun out by the soil material squeezing means while securing the buffer construction area or the storage area where the buffer body is not constructed in the construction area of the buffer body. If the support is moved by the moving means in such a manner that the per-movement amount is constant, the working efficiency when constructing the buffer can be further improved.

  Embodiments of a shock absorber construction apparatus according to the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a diagram showing a shock absorber construction apparatus 10 according to the present invention. The shock absorber construction device 10 is composed of a frame 11, a device body 20, and a power slide unit (moving means) PS.

  The frame 11 supports the apparatus main body 20 and is composed of four columns 12, four girders 13, and four beams 14. For example, the pillars 12 are placed on the rock G at a position that becomes the periphery of the disposal hole H, and are arranged at positions that become, for example, square apexes when viewed from above, and the girders 13 are arranged on the pillars 12. Are arranged at positions equivalent to the sides of the square as viewed from above, and the beam 14 is arranged in a square shape as viewed from above at the upper part of the beams 13. They are arranged at positions equivalent to the diagonal lines of the beam 13 respectively. The disposal hole H is for filling high-level radioactive waste, for example, and is formed by excavating the rock mass G into a cylindrical shape. Such a disposal hole H uses the whole inside except the waste body mentioned later as the construction area of the buffer body.

  As shown in FIGS. 2 and 3, the apparatus main body 20 includes a fixed body 21 and a support body 22 that supports a rammer, which is a compacting means described later, so as to correspond to the size of the disposal hole H. An annular bearing 23 is provided between the fixed body 21 and the support body 22, and the support body 22 is fixed to the fixed body 21 in such a manner that the bearing 23 can rotate around the rotation shaft 22 x. I support it.

  The fixed body 21 includes a fixed cylindrical portion 21a and a rotating cylindrical portion 21b, and includes a rotating means 21c that is, for example, an electric motor, and a gripping means 21d that grips the overpack.

  A plurality (two in this example) of annular bearings 21e and 21f are disposed between the fixed cylindrical portion 21a and the rotating cylindrical portion 21b, and the rotating cylindrical portion can be rotated by the bearings 21e and 21f. 21b is supported by the fixed cylindrical portion 21a. The fixed cylindrical portion 21a is provided with a first support plate 21g that supports the rotating means 21c and a second support plate 21h that supports the gripping means 21d.

  The rotating cylindrical portion 21 b is connected to the support body 22 by a connecting member (not shown), and rotates as the support body 22 rotates.

  As shown in FIG. 3, the rotating means 21 c is provided with a driving shaft 21 ca that rotates in a driven state, and an annular driven gear that is provided at the tip of the driving shaft 21 ca and is provided at the top of the support 22. A drive gear 21cb meshed with 22g, and when driven, the drive gear 21cb is rotated together with the drive shaft 21ca, and the driven gear 22g is rotated along with the rotation of the drive gear 21cb. Thus, the support 22 and the rotating cylindrical portion 21b are rotated with respect to the fixed cylindrical portion 21a, the frame 11, and the rock mass G.

  The gripping means 21d is, for example, an engaging recess 21da having an inner diameter Φ2 slightly larger than the outer diameter Φ1 of the overpack OV, which is a glass-solidified container formed by mixing molten glass and radioactive waste. And a mounting member 23db for attaching a second rod, which will be described later, of the power slide unit PS.

  The support 22 supports the rammer R and includes a support frame 22a and, for example, two displacement means Z1 and Z2 as shown in FIG. In other words, displacement means Z1 and Z2 are provided between the support 22 and the rammer R.

  The displacement means Z1 includes a first arm (arm member) 22b and a first cylinder actuator (arm member displacement means) SH1. On the other hand, the displacement means Z2 includes a second arm (arm member) 22c and a second cylinder actuator (arm member displacement means) SH2.

As shown in FIG. 2, the rammer R includes a rammer main body (driving device main body) Rb, a rod (rod member) Rr provided so as to be able to extend and contract along the movement axis Rx with respect to the rammer main body Rb, and the rod Rr. In the case where the rammer body Rb is driven by, for example, sucking air into the rammer body Rb and discharging air from the rammer body Rb, the rammer body Rb is provided. In contrast, the rod Rr is expanded and contracted, whereby the compacting head Rh is reciprocated in the vertical direction along the movement axis Rx. Such rammer R, for example, air consumption per unit time is 0.25m ³ /min~1.10m ³ / min, hit number per unit time is 600bpm (beat per minute) ~1600bpm, mass 1 .7 kg to 16.7 kg are used.

  A first arm 22b is attached to the support frame 22a in such a manner that it can swing around the swing shaft 22bx, and a second arm 22c is attached in such a manner that it can swing around the swing shaft 22cx. .

  As shown in FIGS. 2, 4, and 5, a plurality of the above-described rammers R are attached to the first arm 22 b in a row form. More specifically, the first arm 22b is provided with eight of the above-described rammers R in a line from one end to the other end. The swing shaft 22bx is disposed at one end of the first arm 22b.

  The second arm 22c is provided with a plurality of the above-described rammers R in a row. More specifically, on the second arm 22c, five of the above-described rammers R are attached to a portion extending from one end to the other end in a row. The swing shaft 22cx is disposed at one end of the second arm 22c.

  The first cylinder actuator SH1 is disposed between the first arm 22b and the support frame 22a, and includes a cylinder body SHb1 and a rod SHr1 that can be expanded and contracted with respect to the cylinder body SHb1. The base end of the main body SHb1 is attached to the support frame 22a, while the tip end of the rod SHr1 is attached to the first arm 22b. For example, when the cylinder body SHb1 sucks air into the first cylinder actuator SH1, the rod SHr1 is extended from the cylinder body SHb1 and the other end of the first arm 22b is supported as shown in FIG. When the air is discharged from the cylinder main body SHb1 while being displaced to the second state away from the rotary shaft 22x, the rod SHr1 is accommodated inside the cylinder main body SHb1 as shown in FIG. 4, and the first arm 22b The other end is displaced to the first state close to the rotating shaft 22x of the support 22.

  The second cylinder actuator SH2 is disposed between the second arm 22c and the support frame 22a, and includes a cylinder body SHb2 and a rod SHr2 that can be expanded and contracted with respect to the cylinder body SHb2. The base end of the main body SHb2 is attached to the support frame 22a, while the tip end of the rod SHr2 is attached to the second arm 22c. For example, when the cylinder body SHb2 sucks air, the second cylinder actuator SH2 extends the rod SHr2 from the cylinder body SHb2 and supports the other end of the second arm 22c as shown in FIG. When the air is discharged from the cylinder body SHb2 while being displaced to the second state away from the rotating shaft 22x of the rod 22, as shown in FIG. 4, the rod SHr2 is housed inside the cylinder body SHb2, and the second arm 22c. The other end is displaced to the first state close to the rotating shaft 22x of the support 22.

  As shown in FIG. 1, the power slide unit PS includes first moving means 30 and second moving means 40, and moves the apparatus main body 20 in the vertical direction with respect to the frame 11.

  The first moving means 30 is a portion located at the intersection of the diagonal lines of the beam 13 arranged in a square when viewed from above, and is provided below the portion where the four beams 14 are connected. It is configured.

  The cylinder actuator 31 includes a cylinder body 32, a first rod 33 that can be expanded and contracted with respect to the cylinder body 32, and a second rod 34 that can be expanded and contracted with respect to the first rod 33. While the base end of the main body 32 is attached to the beam 14, the tip of the second rod 34 is attached to the attachment member 21db of the gripping means 21d shown in FIG. Such a cylinder actuator 31 expands and contracts the first rod 33 with respect to the cylinder body 32 when it is driven, for example, by injecting oil into the cylinder body 32 or discharging oil from the cylinder body 32. In addition, the main body 20 can be moved up and down with respect to the frame 11 by extending and contracting the second rod 34 with respect to the first rod 33.

  The second moving means 40 includes a cylinder actuator 41, a plurality (seven in this example) of pulleys 42 a, 42 b, 42 c, 42 d, 42 e, 42 f, 42 g, 42 h and one wire 43.

  The cylinder actuator 41 is attached to the center of the two pillars 12 by a fixing member (not shown), the cylinder body 41b, a rod 41r that can be expanded and contracted with respect to the cylinder body 41b, and the tip of the rod 41r. For example, when a drive state is established by injecting oil into the cylinder body 41b or discharging oil from the cylinder body 41b, the rod 41r is expanded and contracted with respect to the cylinder body 41b. Thus, the head 41h is moved up and down.

  The first pulley 42a is attached to the beam 14 in a rotatable manner via a fixing plate (not shown), and the second pulley 42b is attached to the beam 14 in a rotatable manner via a fixing plate (not shown). The third pulley 42c is attached to the beam 13 in a rotatable manner, the fourth pulley 42d is attached to the head 41h in a rotatable manner, and the fifth pulley 42e is attached to the beam 13 in a rotatable manner. The sixth pulley 42f is attached to the head 41h in a rotatable manner, the seventh pulley 42g is attached to the beam 13 in a rotatable manner, and the eighth pulley 42h is rotatable through a fixed plate (not shown). It is attached to the beam 14 in such a manner. These pulleys 42a, 42b, 42c, 42d, 42e, 42f, 42g, and 42h are for changing the extending direction of the wire 43 by winding the wire 43 as will be described later.

  One end of the wire 43 is locked to the upper part of the fixed body 21 of the apparatus body 20, and then the first pulley 42a, the second pulley 42b, the third pulley 42c, the fourth pulley 42d, the fifth pulley 42e, and the sixth pulley 42f. The seventh pulley 42g and the eighth pulley 42h are wound around in this order, and the other end is locked to the upper portion of the fixed body 21 of the apparatus main body 20.

  By configuring the second moving means 40 in this way, for example, when the rod 41r accommodated in the cylinder body 41b is extended by the length L and the head 41h is moved upward, The apparatus main body 20 can be moved downward by a length of 4L, and the head 41h is moved downward by reducing the length L by storing the rod 41r extended from the cylinder main body 41b. In this case, the apparatus main body 20 can be moved up and down with respect to the frame 11 by a length of 4L.

  The first moving means 30 and the second moving means 40 cannot move the apparatus main body 20 by only one of the moving operations, but can move the apparatus main body 20 by both moving operations.

  The buffer construction apparatus 10 having the above-described configuration is provided with a soil material squeezing means (not shown) that squeezes the soil material, and the soil material is spun while the support 22 is rotated with respect to the fixed body 21. Can be put out.

  And the buffer body construction | assembly apparatus 10 constructs | assembles a buffer body as follows, for example. Here, the four pillars 12 are placed on the rock G at the periphery of the disposal hole H provided in a columnar shape, and as shown in FIG. 4, the first arm 22b is moved by the first cylinder actuator SH1. The second rod 22 is displaced in the first state, and the second arm 22c is displaced in the first state by the second cylinder actuator SH2, and the second rod 34 is accommodated in the first rod 33 as shown in FIG. At the same time, the first rod 33 is housed in the cylinder body 32, the tip of the second rod 34 is placed at the uppermost position, the rod 41r is housed inside the cylinder body 41b, and the head 41h is placed at the lowermost position. Therefore, the apparatus main body 20 will be described as being disposed above the disposal hole H and at the uppermost position.

  From this state, as shown in FIG. 6, the first rod 33 is extended with respect to the cylinder body 32 so that the tip of the second rod 34 of the first moving means 30 is at the lowest position, and the first rod 33 is moved to the first rod 33. On the other hand, by extending the second rod 34 and extending the rod 41r with respect to the cylinder body 41b so that the head 41h of the second moving means 40 is at the uppermost position, the lower portion of the clamping head Rh of the rammer R and the disposal hole The apparatus main body 20 is disposed at a position where the bottom of H is at a predetermined interval.

  Next, air is sucked into the rammer main body Rb while expelling the soil material inside the disposal hole H between the lower portion of the compaction head Rh and the bottom of the disposal hole H by the soil material squeezing means. In addition, the air is discharged from the ramer main body Rb so that the rammer R is driven, whereby the compaction head Rh is reciprocated in the vertical direction, and the soil material is compacted by the compaction head Rh. In addition, the rotating means 21c is driven while the rammer R is driven, and the support 22 is rotated with respect to the frame 11 and the rock mass G. When the support 22 is rotated in this way, as shown in FIG. 7 with hatching, the rotation trajectory of the rammer R accompanying the rotation of the support 22 covers the entire construction region Tr of the buffer. . Then, the soil material of the entire construction area Tr of the buffer body is compacted by the compacting head Rh.

  Next, the second rod 34 of the first moving means 30 is gradually housed in the first rod 33 and the first rod 33 is moved to the cylinder in order to move the apparatus main body 20 upward as the soil material is compacted. While gradually storing in the main body 32, the rod 41r of the second moving means 40 is gradually stored inside the cylinder main body 41b.

  Thereafter, in the same manner as described above, the soil material was squeezed out by the soil material squeezing means, the soil material was compacted by Ranma R, and the apparatus main body 20 was moved upward, and compacted as shown in FIG. The height of the soil material is H1.

  Next, in order to move the apparatus main body 20 to the uppermost position, the second rod 34 of the first moving means 30 is accommodated in the first rod 33, the first rod 33 is accommodated in the cylinder main body 32, and the second The rod 41r of the moving means 40 is accommodated in the cylinder body 41b. Then, the apparatus main body 20 is moved to the uppermost position, and the apparatus main body 20 is moved above the disposal hole H.

  After this state, as shown in FIG. 5, by drawing air into the cylinder body SHb1, the rod SHr1 is extended from the cylinder body SHb1, the first arm 22b is displaced to the second state, and the cylinder body SHb2 is moved to the cylinder body SHb2. By sucking air, the rod SHr2 is extended from the cylinder body SHb2 to displace the second arm 22c to the second state. Thereafter, as shown in FIG. 9, the upper part of the waste body WA composed of the glass solid body GA and the overpack OV is fitted into the engaging recess 21da of the gripping means 21d, and the waste body WA is gripped by the gripping means 21d. .

  Next, as shown in FIG. 10, the first rod 33 is extended with respect to the cylinder body 32 of the first moving means 30 so that the compacting head Rh of the rammer R contacts the compacted soil material, and While extending the 2nd rod 34 with respect to the 1st rod 33, the rod 41r is extended with respect to the cylinder main body 41b of the 2nd moving means 40, and the apparatus main body 20 is moved below.

  Next, after moving the apparatus main body 20 upward so that the lower part of the compacting head Rh of the ramma R and the compacted soil material are at a predetermined interval, the soil material is removed by the soil material leaching means in the same manner as described above. The rammer body Rb is driven in a state where the rammer body Rb is driven by sucking air into the rammer body Rb and expelling air from the rammer body Rb. The soil material is compacted with Rh. In addition, while the rammer R is driven, the rotating means 21 c is driven to rotate the support 22 relative to the frame 11. When the support body 22 is thus rotated, as shown in FIG. 11, the rotation trajectory of the rammer R accompanying the rotation of the support body 22 secures a storage area ST for storing the waste body WA in the buffer construction area Tr. It will be. Then, the soil material (the soil material on the side of the waste body WA) in the buffer construction region Tr is compacted by the compacting head Rh.

  Next, the second rod 34 of the first moving means 30 is gradually housed in the first rod 33 and the first rod 33 is moved to the cylinder in order to move the apparatus main body 20 upward as the soil material is compacted. While gradually storing in the main body 32, the rod 41r of the second moving means 40 is gradually stored inside the cylinder main body 41b.

  Thereafter, in the same manner as described above, the soil material was squeezed out by the soil material squeezing means, the soil material was compacted by Ranma R, and the apparatus main body 20 was moved upward, and compacted as shown in FIG. The height of the soil material is H2.

  Next, by discharging air from the inside of the cylinder body SHb1, as shown in FIG. 4, the rod SHr1 is housed in the cylinder body SHb1, the first arm 22b is displaced to the first state, and the cylinder body SHb2 By discharging air from the inside, the rod SHr2 is housed in the cylinder body SHb2, and the second arm 22c is displaced to the first state.

  Thereafter, in the same manner as described above, the soil material is squeezed out by the soil material squeezing means, the soil material is squeezed by the ramma R, and the apparatus main body 20 is moved upward. As shown in FIG. The height of the hardened soil material is H3, and the buffer body 50 is constructed inside the disposal hole H except for the waste body WA.

According to such a shock absorber construction apparatus 10, the rotation trajectory of the rammer R accompanying the rotation of the support member 22 is supported between the support member 22 and the rammer R so as to cover the entire construction region Tr of the shock absorber 50. The first state in which the rammer R is arranged with respect to the body 22 and the storage area ST for storing the waste WA in the entire construction area Tr of the buffer body 50 (the buffer body is not built in the entire construction area). Displacement means Z1 and Z2 for displacing the rammer R with respect to the support 22 in a manner that secures the storage area) are provided, so the arrangement of the rammer R with respect to the support 22 is displaced to the first state. By doing so, the soil material in the entire construction region Tr of the buffer body 50 can be compacted, and if the arrangement of the rammer R with respect to the support 22 is displaced to the second state, the construction material Tr in the construction region Tr of the buffer body 50 storage area ST (buffer body It can compacting soil material while ensuring no built housing area). Therefore, since it is not necessary to replace the support body 22 when constructing the buffer body 50, the working efficiency when constructing the buffer body 50 can be improved. In addition, the buffer 50 can be constructed integrally by compacting the soil material (in-situ) at the high-level radioactive waste disposal site where the high-level radioactive waste is buried, so that the buffer is also immediately after construction. It is possible to reduce the possibility of forming a gap in 50, thereby reducing the possibility of leakage of water contaminated by radioactive waste. Moreover, as the rammer R, the number of hits per unit time is 600 bpm (beat per minute) to 1600 bpm, and the mass is 1.7 kg to 16.7 kg. The impact applied to the waste body WA can be reduced as compared with the case of compacting the.

  In the above-described embodiment, the entire interior of the disposal hole H is described as the buffer construction region Tr. However, the present invention is not limited to this, and for example, a part of the disposal hole H may be used as a buffer construction region.

  In the above-described embodiment, the buffer constructing device 10 is used to fill the disposal hole H with high-level radioactive waste. However, the present invention is not limited to this, and the low-level radioactive waste may be buried in the disposal hole H or the industrial waste may be buried in the disposal hole H using the buffer construction device 10.

Further, the cushion construction apparatus 10 described above, the soil material撒出means, a quantity of soil material per unit time, cushion construction area Tr or buffer of the building region Tr in a predetermined storage area ST ( If the support is moved by the power slide unit PS in such a manner that the amount of movement per unit time is constant while keeping out the storage area where the buffer body is not constructed), the work efficiency when constructing the buffer body Can be further improved.

It is a side view showing a schematic structure of a buffer construction device concerning the present invention. It is a side view which shows the apparatus main body with which the shock absorber construction apparatus shown in FIG. It is the elements on larger scale which show a part of support body with which the apparatus main body shown in FIG. 2 is provided. It is explanatory drawing which shows the case where the 1st arm with which the apparatus main body shown in FIG. 2 is provided is displaced to the 1st state, and the 2nd arm is displaced to the 1st state. It is explanatory drawing which shows the case where the 1st arm with which the apparatus main body shown in FIG. 2 is provided is displaced to the 2nd state, and the 2nd arm is displaced to the 2nd state. It is explanatory drawing which shows the case where the buffer body is constructed | assembled with the buffer body construction apparatus shown in FIG. It is explanatory drawing which shows the case where the rotation locus | trajectory of the compaction means accompanying rotation of a support body covers the whole construction area | region of a buffer body. It is explanatory drawing which shows the case where the buffer body is constructed | assembled with the buffer body construction apparatus shown in FIG. It is explanatory drawing which shows the case where the buffer body is constructed | assembled with the buffer body construction apparatus shown in FIG. It is explanatory drawing which shows the case where the buffer body is constructed | assembled with the buffer body construction apparatus shown in FIG. It is explanatory drawing which shows the case where the rotation locus | trajectory of the compaction means accompanying rotation of a support body ensures the storage area | region which accommodates an overpack in the construction area | region of a buffer body. It is explanatory drawing which shows the case where the buffer body is constructed | assembled with the buffer body construction apparatus shown in FIG. It is explanatory drawing which shows the case where the buffer body is constructed | assembled with the buffer body construction apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Buffer construction apparatus 22 Support body 22b 1st arm (arm member)
22c Second arm (arm member)
22bx first swing axis (swing axis)
22cx Second swing axis (swing axis)
50 Buffer H Disposal hole PS Power slide unit (moving means)
R Ranma (consolidation means)
Rh Compaction head (consolidation member)
SH1 First cylinder actuator (arm member displacement means)
SH2 Second cylinder actuator (arm member displacement means)
Z1 displacement means Z2 displacement means

Claims (4)

By supporting the compaction means on the support body and rotating the support body in a state where the compaction means is driven, the soil material located on the rotation locus of the compaction means is compacted to construct a buffer body. A shock absorber construction device configured as described above,
Between the support and the compaction means, the compaction means is attached to the support in such a manner that a rotation trajectory of the compaction means accompanying the rotation of the support covers the entire construction region of the buffer. Displacement means for displacing between the first state in which the compaction means is disposed and the second state in which the compaction means is disposed with respect to the support in a manner that secures a storage region in which the buffer body is not constructed in the entire construction region. A shock absorber construction device characterized by being provided.   The displacement means includes a plurality of the fastening means, an arm member disposed in a manner capable of swinging around a swing shaft with respect to the support, and swinging the arm member to support the support. The shock absorber construction device according to claim 1, further comprising arm member displacing means for displacing the arrangement of the compacting means with respect to the first state and the second state.   The said compaction means is provided with the drive device main body, the rod member which can be expanded-contracted with respect to a drive device main body, and the compaction member arrange | positioned at the front-end | tip of a rod member. 2. The buffer construction apparatus according to 2. Moving means for moving the support according to the compaction of the soil material;
The soil material leaching means for scooping out the soil material while securing a construction area of the buffer body or a storage area in which the cushion body is not constructed is disposed in the construction area. The buffer construction apparatus according to one.

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