JP2008049312A - Construction method of clay-based water sealing layer - Google Patents

Construction method of clay-based water sealing layer Download PDF

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JP2008049312A
JP2008049312A JP2006230374A JP2006230374A JP2008049312A JP 2008049312 A JP2008049312 A JP 2008049312A JP 2006230374 A JP2006230374 A JP 2006230374A JP 2006230374 A JP2006230374 A JP 2006230374A JP 2008049312 A JP2008049312 A JP 2008049312A
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clay
based material
diffusion layer
low diffusion
brewing machine
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JP5131512B2 (en
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Takashi Aoki
孝 青木
Taku Ishii
卓 石井
Masao Sawada
正雄 澤田
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Shimizu Construction Co Ltd
Shimizu Corp
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Shimizu Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/30—Landfill technologies aiming to mitigate methane emissions

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method of a clay-based water sealing layer capable of constructing a clay-based water sealing layer by neither making a sprinkling machine disturb travel of a roller nor making the roller disturb no travel of the sprinkling machine. <P>SOLUTION: In the construction method of a clay-based water sealing layer, a low diffusion layer 17 having a rectangular cross-sectional shape is constructed to surround the circumference of skeleton concrete containing a waste storage skeleton, a side back filling section 18 is constructed opposite to the side face of the lower diffusion layer 17 with a predetermined space, and a clay-based material is sprinkled between the low diffusion layer 17 and the side back filling section 18 and then is rolled to form the clay-based water sealing layer between the low diffusion layer 17 and the side back filling section 18. The sprinkling machine 2 is arranged to travel along the top face of the low diffusion layer 17 to sprinkle the clay-based material between the low diffusion layer 17 and the side back filling section 18 from the sprinkling machine 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、粘土系遮水層の敷設方法に関するものであって、例えば、低レベル放射性廃棄物の埋設処分施設において側部に敷設する粘土系遮水層の敷設方法に関するものである。   The present invention relates to a method for laying a clay-based impermeable layer, for example, a method for laying a clay-based impermeable layer to be laid on a side part in a low-level radioactive waste burying disposal facility.

低レベルの放射性廃棄物の埋設処分施設が計画されている。埋設処分施設は、掘削した地下坑道の内部に底部埋戻部と底部遮水層とを敷設した後に、躯体コンクリートを構築したものである。躯体コンクリートは上方が開口しており、低レベルの放射性廃棄物が格納された放射性廃棄物格納躯体を内部に収容可能となっている。そして、躯体コンクリートの内部に放射性廃棄物格納躯体を収容した後、放射性廃棄物格納躯体の相互間に生じた隙間にモルタルを充填するとともに蓋体（躯体コンクリート）で開口を塞ぐことにより、躯体コンクリートは封止される。その後、躯体コンクリートの周りを低拡散層で囲繞することにより、安全を期している。さらに、低拡散層と、別途構築された側部埋戻部との間に、粘土系材料を転圧施工することにより粘土系遮水層を構築し、さらなる安全を期している（例えば、特許文献１参照）。   A low-level radioactive waste disposal facility is planned. The buried disposal facility is constructed of reinforced concrete after laying a bottom backfill and a bottom impermeable layer inside an excavated underground tunnel. The upper part of the concrete frame is open and can accommodate a radioactive waste storage case in which low-level radioactive waste is stored. Then, after housing the radioactive waste storage enclosure inside the enclosure concrete, the gap formed between the radioactive waste storage enclosures is filled with mortar and the opening is closed with a lid (concrete concrete). Is sealed. After that, safety is expected by surrounding the concrete frame with a low diffusion layer. In addition, a clay-based impermeable layer is constructed by rolling the clay-based material between the low-diffusion layer and the separately-constructed side portion of the backfilling unit, for further safety (for example, patents) Reference 1).

特開２００４−１２３５６号公報JP 2004-12356 A

ところで、低拡散層と側部埋戻部との間は、例えば、幅が略１メートル、高さが略１０メートル、奥行きが略３００メートルの狭隘な空間であるため、粘土系材料を撒き出す撒出機と粘土系材料を転圧する転圧機とを横並びとなるように配備することができなかった。このため、図８に示すように、撒出機１００の後方を転圧機２００が走行するように配備してあり、撒出機１００が転圧機２００の走行を阻害することもあれば、反対に転圧機２００が撒出機１００の走行を阻害することもあった。また、行き止まりとなる埋設処分施設の最奥部を転圧する場合には、撒出機１００と転圧機２００とを一旦外部に出してから再び転圧機２００を最奥部に入れる必要もあった。   By the way, since the space between the low diffusion layer and the side portion backfill portion is a narrow space having a width of about 1 meter, a height of about 10 meters, and a depth of about 300 meters, the clay-based material is sprinkled out. The brewing machine and the compacting machine that compacts clay-based materials could not be deployed side by side. For this reason, as shown in FIG. 8, it arrange | positions so that the compacting machine 200 may run behind the unwinding machine 100, and the unwinding machine 100 may obstruct the traveling of the compacting machine 200. In some cases, the rolling compactor 200 hinders the running of the brewing machine 100. Further, when rolling the innermost part of the buried disposal facility that is a dead end, it is necessary to take out the brewing machine 100 and the compacting machine 200 to the outside and then put the compacting machine 200 into the innermost part again.

本発明は、上記に鑑みてなされたものであって、撒出機が転圧機の走行を阻害することもなければ、転圧機が撒出機の走行を阻害することもない状態で、粘土系遮水層の敷設を可能とした粘土系遮水層の敷設方法を提供することを目的とする。   The present invention has been made in view of the above, and in a state where the brewing machine does not obstruct the running of the compacting machine and the rolling machine does not obstruct the running of the brewing machine, It is an object of the present invention to provide a clay-based impermeable layer laying method that enables the impermeable layer to be laid.

上述した課題を解決し、目的を達成するために、本発明の請求項１に係る粘土系遮水層の敷設方法は、廃棄物格納躯体を収容した躯体コンクリートの周りを囲繞することにより構築され、横断面が矩形形状を有した低拡散層と、該低拡散層の側面と所定の間隔を有して対向するように構築された側部埋戻部との間に、粘土系材料を撒き出した後、該粘土系材料を転圧することにより、前記低拡散層と前記側部埋戻部との間に粘土系遮水層を敷設する粘土系遮水層の敷設方法において、前記低拡散層の上面を走行するように撒出機を配備し、該撒出機から前記低拡散層と前記側部埋戻部との間に粘土系材料を撒き出すことを特徴とする。   In order to solve the above-mentioned problems and achieve the object, the clay-based impermeable layer laying method according to claim 1 of the present invention is constructed by surrounding the surrounding concrete containing the waste storage enclosure. A clay-based material is spread between a low diffusion layer having a rectangular cross-section and a side backfilling portion constructed so as to face the side surface of the low diffusion layer with a predetermined interval. In the laying method of the clay-based impermeable layer, the clay-based impermeable layer is laid between the low-diffusion layer and the side portion backfilled portion by rolling the clay-based material after rolling. A brewing machine is arranged to run on the upper surface of the layer, and clay-based material is squeezed out from the brewing machine between the low diffusion layer and the side portion backfilling part.

また、本発明の請求項２に係る粘土系遮水層の敷設方法は、上記請求項１において、前記撒出機は、撒き出す粘土系材料の厚みを一様化する厚み一様化手段を有し、前記厚み一様化手段が撒き出す粘土系材料の厚みを一様化した後に、前記撒出機が当該粘土系材料を撒き出すことを特徴とする。   The clay-based impermeable layer laying method according to claim 2 of the present invention is the above-described method according to claim 1, wherein the brewing machine includes a thickness uniformizing means for uniformizing the thickness of the clay-based material to be sprinkled. And the uniformizing means uniforms the thickness of the clay-based material, and after the thickness of the clay-based material is uniformed, the brewing machine squeezes out the clay-based material.

また、本発明の請求項３に係る粘土系遮水層の敷設方法は、上記請求項１または２において、前記撒出機は、撒き出された粘土系材料の位置エネルギーによる衝撃を緩和する衝撃緩和手段を有し、前記衝撃緩和手段が撒き出された粘土系材料の位置エネルギーによる衝撃を緩和することを特徴とする。   According to a third aspect of the present invention, there is provided the clay-based impermeable layer laying method according to the first or second aspect, wherein the brewing machine is a shock that alleviates the impact caused by the potential energy of the clay-based material that has been squeezed out. It has a mitigation means, The impact mitigation means mitigates the impact by the potential energy of the clay-based material spun out.

本発明に係る粘土系遮水層の敷設方法は、低拡散層の上面を走行するように撒出機を配備し、この撒出機から低拡散層と側部埋戻部との間に粘土系材料を撒き出すので、撒出機と転圧機とが異なる部位を走行することになり、撒出機が転圧機の走行を阻害することもなければ、転圧機が撒出機の走行を阻害することもない。また、埋設処分施設の最奥部が行き止まりであっても、撒出機と転圧機とを一旦外部に出してから再び転圧機を最奥部に入れる必要もない。   In the method of laying a clay-based impermeable layer according to the present invention, a brewing machine is arranged so as to run on the upper surface of the low diffusion layer, and the clay is placed between the low diffusion layer and the side backfill portion from the brewing machine. Since the material is sprinkled, the brewing machine and the compaction machine will run on different parts, and if the brewing machine does not obstruct the running of the compacting machine, the compacting machine will obstruct the running of the brewing machine. I don't have to. Moreover, even if the innermost part of the buried disposal facility is a dead end, there is no need to take out the brewing machine and the compactor once and then put the compactor again in the deepest part.

以下に、本発明の実施の形態に係る粘土系遮水層の敷設方法を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。   Hereinafter, a method for laying a clay-based impermeable layer according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

図１は、本発明の実施の形態に係る粘土系遮水層の敷設方法を適用する低レベルの放射性廃棄物の埋設処分施設を示す横断面図である。   FIG. 1 is a cross-sectional view showing a low-level radioactive waste embedding disposal facility to which a clay-based impermeable layer laying method according to an embodiment of the present invention is applied.

低レベルの放射性廃棄物の埋設処分施設１は、掘削した地下坑道１１の内部に底部埋戻部１２と底部遮水層１３とを敷設した後に、躯体コンクリート１４を構築したものである。底部埋戻部１２は、コンクリート、モルタル、あるいは、粘土系材料（例えば、ベントナイト系粘土材料）等の埋戻材料を敷設したものであり、底部遮水層１３は、粘土系材料（例えば、ベントナイト原鉱石破砕粒度調整材）を転圧施工したものである。躯体コンクリート１４は上方が開口しており、内部に低レベルの放射性廃棄物が格納された放射性廃棄物格納躯体１５を収容可能となっている。そして、躯体コンクリート１４の内部に放射性廃棄物格納躯体１５を収容した後に、放射性廃棄物格納躯体１５の相互間に生じた隙間にモルタル１６を充填するとともに蓋体１４ａ（躯体コンクリート）で開口を塞ぐことにより、躯体コンクリート１４は封止される。その後、躯体コンクリート１４の周りを低拡散層１７で囲繞することにより安全を期している。低拡散層１７は、無筋のセメント系モルタルを打設することにより構築され、横断面が矩形形状を有している。また、地下坑道１１の側壁に沿って側部埋戻部１８が別途構築されている。側部埋戻部１８は、低拡散層１７の側面と所定の間隔を有して対向するように構築されており、低拡散層１７と側部埋戻部１８との間には、狭隘な空間である狭隘部１９が画成されている。狭隘部１９は、例えば、幅略１メートル、高さ略１０メートル、奥行き略３００メートルの空間である。   The low-level radioactive waste burying / disposal facility 1 is constructed by laying a bottom backfill portion 12 and a bottom water-impervious layer 13 inside an excavated underground tunnel 11 and then building a concrete frame 14. The bottom backfill portion 12 is constructed by laying backfill material such as concrete, mortar, or clay-based material (for example, bentonite-based clay material), and the bottom impermeable layer 13 is made of clay-based material (for example, bentonite). The raw ore crushing particle size adjusting material) is rolled. The upper part of the frame concrete 14 is open and can accommodate a radioactive waste storage case 15 in which low-level radioactive waste is stored. And after accommodating the radioactive waste storage housing 15 in the inside of the housing concrete 14, the mortar 16 is filled in the gap formed between the radioactive waste storage housing 15 and the opening is closed with the lid 14a (body concrete). Thereby, the concrete frame 14 is sealed. After that, the surroundings of the frame concrete 14 are surrounded by a low diffusion layer 17 to ensure safety. The low diffusion layer 17 is constructed by placing an unreinforced cement-based mortar and has a rectangular cross section. In addition, a side backfill 18 is separately constructed along the side wall of the underground mine shaft 11. The side portion backfilling portion 18 is constructed so as to face the side surface of the low diffusion layer 17 with a predetermined interval, and is narrow between the low diffusion layer 17 and the side portion backfilling portion 18. A narrow portion 19 that is a space is defined. The narrow portion 19 is, for example, a space having a width of about 1 meter, a height of about 10 meters, and a depth of about 300 meters.

本発明の実施の形態に係る粘土系遮水層の敷設方法は、上述した低拡散層１７と側部埋戻部１８との間に画成された狭隘部１９に敷設する側部遮水層の敷設方法に関するものである。図１に示すように、低拡散層１７の上方は比較的大きな空間として利用可能であり、低拡散層１７の側面および上面は平坦な面となっている。一方、側部埋戻部１８は、底部埋戻部１２と同様に、コンクリート、モルタル、あるいは、粘土系材料（例えば、ベントナイト系粘土材料）等の埋戻材料により構築してあり、その側面は平坦な面となっている。   The clay-based impermeable layer laying method according to the embodiment of the present invention is the side impermeable layer laid on the narrow portion 19 defined between the low diffusion layer 17 and the side backfill portion 18 described above. Is related to the laying method. As shown in FIG. 1, the upper side of the low diffusion layer 17 can be used as a relatively large space, and the side surface and the upper surface of the low diffusion layer 17 are flat. On the other hand, the side portion backfilling portion 18 is constructed of a backfilling material such as concrete, mortar, or clay-based material (for example, bentonite-based clay material) in the same manner as the bottom portion backfilling portion 12, and its side surface is It is a flat surface.

図２〜図４に示すように、低拡散層１７の上面を走行するように撒出機２を配備する一方、低拡散層１７と側部埋戻部１８との間を走行するように転圧機３を配備してある。したがって、撒出機２は、転圧機３と段差を隔てて横並びとなるように走行することができる。   As shown in FIGS. 2 to 4, the brewing machine 2 is arranged so as to run on the upper surface of the low diffusion layer 17, while the rolling machine 2 runs between the low diffusion layer 17 and the side backfill portion 18. A pressure machine 3 is provided. Therefore, the brewing machine 2 can travel so as to be side by side with a step difference from the compactor 3.

撒出機２は、上方から低拡散層１７と側部埋戻部１８との間に粘土系材料（例えば、ベントナイト原鉱石破砕粒度調整材）を撒き出すもので、撒出機本体２０を有している。撒出機本体２０には、車輪タイプの走行装置２１が取り付けてあり、撒出機２は一定の速度による自動走行が可能となっている。また、撒出機本体２０には、ホッパー２２およびフィーダ２３が搭載してある。ホッパー２２は、撒き出す粘土系材料が供給される部分であって、時間当たり一定量の粘土系材料をフィーダ２３に順次送出可能となっている。フィーダ２３は、例えば、振動により粘土系材料を送出する振動フィーダにより構成してあり、ホッパー２２から供給された粘土系材料を一様な厚みとした後に斜め前方から粘土系材料を撒き出すようになっている。図３に示すように、粘土系材料の撒き出し口となる出口部２３ａは拡幅してあり、低拡散層１７と側部埋戻部１８との間において一様な厚みの粘土系材料を撒き出すようになっている。   The brewing machine 2 draws out clay-based material (for example, bentonite raw ore crushing particle size adjusting material) between the low diffusion layer 17 and the side backfilling part 18 from above, and has the brewing machine main body 20. is doing. A wheel-type travel device 21 is attached to the unwinding machine body 20, and the unwinding machine 2 can automatically travel at a constant speed. In addition, a hopper 22 and a feeder 23 are mounted on the unwinding machine body 20. The hopper 22 is a portion to which the clay-based material to be sprinkled is supplied, and a certain amount of clay-based material per hour can be sequentially sent to the feeder 23. The feeder 23 is constituted by, for example, a vibration feeder that sends out a clay-based material by vibration, and after the clay-based material supplied from the hopper 22 has a uniform thickness, the clay-based material is squeezed out obliquely from the front. It has become. As shown in FIG. 3, the outlet 23 a serving as a clay material outlet is widened, and a clay material having a uniform thickness is spread between the low diffusion layer 17 and the side backfill 18. It comes out.

出口部２３ａの近傍には、図５に示すように、スライドゲート２４を配設しても良い。スライドゲート２４は、所定の厚みを越える粘土系材料がホッパー２２からフィーダ２３に送出された場合、あるいは、フィーダ２３の一方の側に偏って粘土系材料が送出され、粘土系材料に厚みにムラがある場合に、粘土系材料を撒き出す直前において、粘土系材料の厚みが一様となるように敷き均すものであって、敷き均された粘土系材料が任意の厚みとなるように、フィーダ２３の搬送面との間の間隔を任意に調整できるようになっている。   As shown in FIG. 5, a slide gate 24 may be provided in the vicinity of the outlet 23a. When the clay-based material exceeding a predetermined thickness is sent from the hopper 22 to the feeder 23 or when the slide gate 24 is biased to one side of the feeder 23, the clay-based material is sent to the clay-based material. If there is, just before spreading the clay-based material, spread the clay-based material so that the thickness of the clay-based material is uniform, so that the spread clay-based material has an arbitrary thickness, The interval between the feeder 23 and the conveying surface can be arbitrarily adjusted.

また、スライドゲート２４に換えて、出口部２３ａの近傍に、図６に示すように、堰２５を設けても良い。堰２５は、スライドゲート２４と同様に、粘土系材料を撒き出す直前において、粘土系材料の厚みが一様となるように均すものであって、撒き出し方向に向けてフィーダ２３の搬送面から漸次離反するように（高くなるように）傾斜している。   Further, in place of the slide gate 24, a weir 25 may be provided in the vicinity of the outlet 23a as shown in FIG. As with the slide gate 24, the weir 25 is to level the clay-based material so that the thickness of the clay-based material becomes uniform immediately before the clay-based material is sprinkled. It is inclined so as to gradually move away from (become higher).

上述したフィーダ２３の出口部２３ａは拡幅するものとしたが、図７に示すように、出口部２３ａを拡幅することなく、斜めに切り落とした形状であっても良い。   The outlet 23a of the feeder 23 described above is widened. However, as shown in FIG. 7, the outlet 23a may be cut off obliquely without widening the outlet 23a.

また、図４中二点鎖線で示すように、撒き出された粘土系材料の位置エネルギーによる衝撃を緩和する衝撃緩衝装置を設けても良い。衝撃緩衝装置は、図４において前方に滑走させる傾斜板２６であっても良いし、粘土系材料を一旦受け止める断続的に配設した傾斜板２７であっても良い。   In addition, as shown by a two-dot chain line in FIG. 4, an impact buffering device may be provided to mitigate an impact caused by potential energy of the clay-based material that has been spun out. The shock absorbing device may be the inclined plate 26 that slides forward in FIG. 4 or the inclined plate 27 that is intermittently disposed to temporarily receive the clay-based material.

転圧機３は、撒出機２から低拡散層と側部埋戻部との間に撒き出された粘土系材料を転圧するもので、転圧機本体３０を有している。転圧機本体３０には、車輪タイプの走行装置３１が取り付けてあり、転圧機３は一定の速度による自動走行が可能となっている。   The compacting machine 3 compacts the clay-based material squeezed out from the brewing machine 2 between the low diffusion layer and the side portion backfilling part, and has a compacting machine body 30. A wheel type travel device 31 is attached to the compactor main body 30, and the compactor 3 can automatically travel at a constant speed.

また、転圧機本体３０は、左右で対となるガイド車輪３２を有している。これらガイド車輪３２は、転圧機本体３０および後述する転圧装置３５の側方に突出したものであり、転圧機本体３０の走行に伴ってガイド車輪３２が回転するように配設してある。したがって、転圧機本体３０はガイド車輪３２に案内され、操向操作をしなくても前後方向に走行可能となっている。   The compactor body 30 has guide wheels 32 that are paired on the left and right. These guide wheels 32 protrude to the sides of the compactor body 30 and the compactor 35 described later, and are arranged so that the guide wheels 32 rotate as the compactor body 30 travels. Therefore, the compactor body 30 is guided by the guide wheels 32 and can travel in the front-rear direction without performing a steering operation.

また、転圧機本体３０には、昇降装置３３、シフト装置３４および転圧装置３５が搭載してある。昇降装置３３は、シフト装置３４および転圧装置３５を上下方向に昇降させるものであり、転圧装置３５を任意の高さに維持した状態で走行可能となっている。シフト装置３４は、昇降装置３３と転圧装置３５との間に設けられ、転圧機本体３０の走行方向と直交する方向に転圧装置３５をシフトさせることが可能となっている。転圧装置３５は、複数の転圧ユニット３５ａを有している。複数の転圧ユニット３５ａは、転圧機本体３０の走行方向と直交する方向に配設してあり、転圧機本体３０の幅を超えて転圧することが可能となっている。各転圧ユニット３５ａは、下方に繰り出すことにより粘土系材料を転圧することが可能であって、これら複数の転圧ユニット３５ａは異なるタイミングで粘土系材料を転圧することが可能である。   In addition, a lifting device 33, a shift device 34, and a rolling device 35 are mounted on the compactor main body 30. The elevating device 33 elevates and lowers the shift device 34 and the compaction device 35 in the vertical direction, and can travel with the compaction device 35 maintained at an arbitrary height. The shift device 34 is provided between the elevating device 33 and the rolling device 35, and can shift the rolling device 35 in a direction orthogonal to the traveling direction of the compactor body 30. The rolling device 35 includes a plurality of rolling units 35a. The plurality of compaction units 35 a are arranged in a direction orthogonal to the traveling direction of the compactor main body 30, and can roll over the width of the compactor main body 30. Each rolling pressure unit 35a can roll the clay-based material by drawing it downward, and the plurality of rolling pressure units 35a can roll the clay-based material at different timings.

上述した転圧機３は、リモートコントローラ（図示せず）を操作することにより、前後の方向に任意の速度で走行し、粘土系材料を転圧することが可能となっている。   The above-described rolling compactor 3 can travel at an arbitrary speed in the front-rear direction and roll the clay-based material by operating a remote controller (not shown).

上述した本発明の実施の形態に係る粘土系遮水層の敷設方法は、撒出機２を低拡散層１７の上面を走行するように配備する一方、転圧機３を低拡散層１７と側部埋戻部１８との間を走行するように配備し、撒出機２が転圧機３に先行して走行することにより、上方から低拡散層１７と側部埋戻部１８との間に画成された狭隘部１９に粘土系材料（例えば、ベントナイト原鉱石破砕粒度調整材）を撒き出す一方、転圧機３が撒出機２に追従して走行することにより、低拡散層１７と側部埋戻部１８との間に画成された狭隘部１９に撒き出された粘土系材料を転圧することになる。   In the above-described method for laying a clay-based impermeable layer according to the embodiment of the present invention, the brewing machine 2 is disposed so as to run on the upper surface of the low diffusion layer 17, while the compactor 3 is disposed on the side of the low diffusion layer 17. It arrange | positions so that it may drive | work between the part backfilling parts 18, and the brewing machine 2 travels ahead of the compactor 3, and it is between the low diffusion layer 17 and the side part backfilling part 18 from upper direction. While the clay-based material (for example, bentonite raw ore crushing particle size adjusting material) is sprinkled into the defined narrow portion 19, the compaction machine 3 runs following the brewing machine 2 so that the low diffusion layer 17 and the side The clay-based material squeezed out in the narrow part 19 defined between the part backfilling part 18 is rolled.

上述した本発明の実施の形態に係る粘土系遮水層の敷設方法によれば、撒出機２が低拡散層１７の上面を走行するように配備し、この撒出機２から低拡散層１７と側部埋戻部１８との間に粘土系材料を撒き出すので、撒出機２が転圧機３の走行を阻害することもなければ、転圧機３が撒出機２の走行を阻害することもない。また、埋設処分施設１の最奥部が行き止まりとなっていても、撒出機２と転圧機３とを一旦外部に出してから再び転圧機３を最奥部に入れる必要もない。さらに、粘土系材料を撒き出す撒出機２が上方に比較的大きな空間を有する低拡散層１７の上面を走行するので、撒出機２への粘土系材料の供給も容易であって、粘土系遮水層の敷設を効率的に行うことができる。   According to the above-described clay-based impermeable layer laying method according to the embodiment of the present invention, the brewing machine 2 is arranged so as to run on the upper surface of the low diffusion layer 17, and the low diffusion layer is extracted from the brewing machine 2. Since the clay-based material is sprinkled between the side 17 and the side backfilling portion 18, the brewing machine 2 does not obstruct the running of the rolling compactor 3, and the rolling compactor 3 obstructs the running of the brewing machine 2. I don't have to. Moreover, even if the innermost part of the buried disposal facility 1 is a dead end, it is not necessary to take out the brewing machine 2 and the compactor 3 once and then put the compactor 3 into the deepest part again. Furthermore, since the brewing machine 2 that draws out the clay-based material travels on the upper surface of the low diffusion layer 17 having a relatively large space above, it is easy to supply the clay-based material to the brewing machine 2, and the clay The system impermeable layer can be laid efficiently.

本発明の実施の形態に係る粘土系遮水層の敷設方法を適用する低レベルの放射性廃棄物の埋設処分施設を示す横断面図である。It is a cross-sectional view which shows the burial disposal facility of the low level radioactive waste to which the laying method of the clay-type impermeable layer according to the embodiment of the present invention is applied. 本発明の実施の形態に係る粘土系遮水層の敷設方法を説明する正面図である。It is a front view explaining the laying method of the clay-type impermeable layer concerning an embodiment of the invention. 本発明の実施の形態に係る粘土系遮水層の敷設方法を説明する平面図である。It is a top view explaining the laying method of the clay-type impermeable layer concerning an embodiment of the invention. 本発明の実施の形態に係る粘土系遮水層の敷設方法を説明する縦断面図である。It is a longitudinal cross-sectional view explaining the laying method of the clay-type water shielding layer which concerns on embodiment of this invention. 粘土系材料を敷き均すスライドゲートを示す側面図である。It is a side view which shows the slide gate which spreads clay-type material and equalizes. 粘土系材料を敷き均す堰を示す側面図である。It is a side view which shows the weir which spreads clay-type material and equalizes. 変形したフィーダの出口部を有する撒出機を示す平面図である。It is a top view which shows the brewing machine which has the exit part of the deform | transformed feeder. 従前の形態に係る粘土系遮水層の敷設方法を説明する縦断面図である。It is a longitudinal cross-sectional view explaining the laying method of the clay-type impermeable layer concerning a conventional form.

符号の説明Explanation of symbols

１ 埋設処分施設
１１ 地下坑道
１４ 躯体コンクリート
１７ 低拡散層
１８ 側部埋戻部
１９ 狭隘部
２ 撒出機
２０ 撒出機本体
２１ 走行装置
２２ ホッパー
２３ フィーダ
２３ａ 出口部
２４ スライドゲート
２５ 堰
２６ 傾斜板
２７ 傾斜板
３ 転圧機
３０ 圧機本体
３１ 走行装置
３２ ガイド車輪
３５ 転圧装置 DESCRIPTION OF SYMBOLS 1 Burial disposal facility 11 Underground tunnel 14 Body concrete 17 Low diffusion layer 18 Side part backfill part 19 Narrow part 2 Unloader 20 Unloader body 21 Traveling device 22 Hopper 23 Feeder 23a Outlet part 24 Slide gate 25 Weir 26 Inclined plate 27 Inclined Plate 3 Compactor 30 Compactor Body 31 Traveling Device 32 Guide Wheel 35 Compactor

Claims (3)

廃棄物格納躯体を収容した躯体コンクリートの周りを囲繞することにより構築され、横断面が矩形形状を有した低拡散層と、該低拡散層の側面と所定の間隔を有して対向するように構築された側部埋戻部との間に、粘土系材料を撒き出した後、該粘土系材料を転圧することにより、前記低拡散層と前記側部埋戻部との間に粘土系遮水層を敷設する粘土系遮水層の敷設方法において、
前記低拡散層の上面を走行するように撒出機を配備し、該撒出機から前記低拡散層と前記側部埋戻部との間に粘土系材料を撒き出すことを特徴とする粘土系遮水層の敷設方法。 It is constructed by surrounding the surrounding concrete containing the waste storage casing, and the cross section of the low diffusion layer having a rectangular shape is opposed to the side surface of the low diffusion layer with a predetermined interval. A clay-based material is sprinkled between the constructed side portion backfilling section, and then the clay-based material is rolled to thereby form a clay-based shield between the low diffusion layer and the side portion backfilling section. In the method of laying a clay-based impermeable layer for laying a water layer,
A clay characterized in that a brewing machine is disposed so as to run on the upper surface of the low diffusion layer, and a clay-based material is squeezed out from the brewing machine between the low diffusion layer and the side backfilling part. A method of laying a system impermeable layer. 前記撒出機は、撒き出す粘土系材料の厚みを一様化する厚み一様化手段を有し、
前記厚み一様化手段が撒き出す粘土系材料の厚みを一様化した後に、前記撒出機が当該粘土系材料を撒き出すことを特徴とする請求項１に記載の粘土系遮水層の敷設方法。 The brewing machine has a thickness uniformizing means for uniformizing the thickness of the clay-based material to be crushed,
2. The clay-based impermeable layer according to claim 1, wherein after the thickness uniformizing means uniformizes the thickness of the clay-based material, the brewing machine spreads the clay-based material. Laying method. 前記撒出機は、撒き出された粘土系材料の位置エネルギーによる衝撃を緩和する衝撃緩和手段を有し、
前記衝撃緩和手段が撒き出された粘土系材料の位置エネルギーによる衝撃を緩和することを特徴とする請求項１または２に記載の粘土系遮水層の敷設方法。 The brewing machine has an impact mitigating means for mitigating an impact caused by potential energy of the clay-based material that has been squeezed out,
The method for laying a clay-based impermeable layer according to claim 1 or 2, wherein the impact-relaxing means relieves an impact due to potential energy of the clay-based material spun out.
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EP2096480A1 (en) 2008-02-29 2009-09-02 Fujinon Corporation Zoom lens of the retrofocus type having two lens groups
JP2010189835A (en) * 2009-02-13 2010-09-02 Shimizu Corp Rolling construction method of clay-based soil material

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JP2004060261A (en) * 2002-07-29 2004-02-26 Ohbayashi Corp Construction method and construction device for slope seepage control work and apparatus carrying device
JP2006213217A (en) * 2005-02-04 2006-08-17 Jfe Koken Corp Conveyed material scattering device

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JP2002341093A (en) * 2001-05-22 2002-11-27 Kajima Corp Waste treatment method
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JP2004060261A (en) * 2002-07-29 2004-02-26 Ohbayashi Corp Construction method and construction device for slope seepage control work and apparatus carrying device
JP2006213217A (en) * 2005-02-04 2006-08-17 Jfe Koken Corp Conveyed material scattering device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2096480A1 (en) 2008-02-29 2009-09-02 Fujinon Corporation Zoom lens of the retrofocus type having two lens groups
JP2010189835A (en) * 2009-02-13 2010-09-02 Shimizu Corp Rolling construction method of clay-based soil material

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