JP2002214394A - Geological disposal facility and its execution method - Google Patents

Geological disposal facility and its execution method

Info

Publication number
JP2002214394A
JP2002214394A JP2001011184A JP2001011184A JP2002214394A JP 2002214394 A JP2002214394 A JP 2002214394A JP 2001011184 A JP2001011184 A JP 2001011184A JP 2001011184 A JP2001011184 A JP 2001011184A JP 2002214394 A JP2002214394 A JP 2002214394A
Authority
JP
Japan
Prior art keywords
disposal
waste
tunnel
facility
filled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2001011184A
Other languages
Japanese (ja)
Inventor
Hiroo Kumasaka
博夫 熊坂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimizu Construction Co Ltd
Shimizu Corp
Original Assignee
Shimizu Construction Co Ltd
Shimizu Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimizu Construction Co Ltd, Shimizu Corp filed Critical Shimizu Construction Co Ltd
Priority to JP2001011184A priority Critical patent/JP2002214394A/en
Publication of JP2002214394A publication Critical patent/JP2002214394A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a geological disposal facility and its execution method that reduce an entire underground facility part by increasing disposal density of waste bodies for disposing high level radioactive waste in nuclear power generation, reduce construction cost by moderating a restriction condition to an adequate rock mass, and improve operability in emplacing the waste bodies. SOLUTION: This geological disposal facility comprises a disposal gallery 5 having a shape allowing forming in its bottom of disposal holes in which the waste bodies are buried vertically via backfill material, and sealing bodies 30 filled with the waste bodies horizontally installed in the disposal gallery and in the crossing direction with the gallery axis. The sealing bodies are constituted with rectangular steel material made containers filled with the waste bodies under the existence of buffer material.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、地層処分施設とそ
の施工法に関し、特に、廃棄体の定置操作を容易にして
安全かつ高密度に処分できる地層処分施設とその施工法
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a geological disposal facility and a method of constructing the same, and more particularly to a geological disposal facility capable of facilitating the operation of disposing of waste bodies and disposing them safely and at a high density and a method of constructing the same.

【0002】[0002]

【従来の技術】原子力発電所を中心にした核燃料サイク
ルは、使用済燃料を再利用するために、使用済燃料を直
接あるいはリサイクル燃料備蓄センターを経由させて再
処理工場に移して、ウランやプルトニウムを回収し、燃
料に加工して再利用するように構成されているが、この
燃料サイクルから外れる放射性廃棄物については、安全
に隔離処分されるように計画されている。
2. Description of the Related Art In a nuclear fuel cycle centered on a nuclear power plant, in order to reuse spent fuel, uranium or plutonium is transferred to a reprocessing plant directly or through a recycled fuel storage center. It is designed to collect, process into fuel and reuse it, but radioactive waste that goes out of this fuel cycle is planned to be safely sequestered.

【0003】再処理工場で発生する高レベルの放射性廃
棄物については、高レベル放射性廃棄物貯蔵施設におい
て廃棄体を冷却のための貯蔵をした後に地層処分施設に
おいて処分することが決められており、地層処分施設で
は、利用不可能な放射性廃棄物を処分するために、図7
に示されるように地下300m以深の地下施設が建設さ
れるように計画されている。
[0003] Regarding high-level radioactive waste generated in a reprocessing plant, it is determined that the waste is stored in a high-level radioactive waste storage facility for cooling and then disposed of in a geological disposal facility. At the geological disposal facility, in order to dispose of unusable radioactive waste,
It is planned that an underground facility with a depth of 300m or less underground will be constructed as shown in (1).

【0004】地層処分施設10は、地下施設部1とこれ
に地上受入施設2を連絡している立坑3及び排気立坑4
から構成されている。地下施設部1は、複数の処分坑道
5とこれらを連絡している主要トンネル6から構成され
ており、立坑3は、廃棄体搬入立坑7、人員・資材立坑
8、緊急用立坑9を擁している。
[0004] The geological disposal facility 10 comprises a shaft 3 and an exhaust shaft 4 connecting the underground facility 1 to the ground receiving facility 2.
It is composed of The underground facility section 1 is composed of a plurality of disposal tunnels 5 and a main tunnel 6 connecting them, and the shaft 3 has a waste loading shaft 7, a staff and material shaft 8, and an emergency shaft 9. I have.

【0005】地層処分施設は、岩種によって硬岩と堆積
岩等の軟岩の二つを対象とした施設に分類されて計画設
計されており、廃棄体を処分する際の定置方法において
も竪置き方式と横置き方式が考慮されていて、各々の施
設に関する技術的な検討がなされている。
[0005] The geological disposal facility is designed and designed to be classified into two types of facilities: hard rock and soft rock, such as sedimentary rock, according to the type of rock. And the horizontal installation method is taken into consideration, and technical studies on each facility are being made.

【0006】軟岩では、処分坑道5はTBM等によって
掘削し、大きな深度の場合は、堀削してから厚さ50c
m程度の覆工コンクリートや圧縮コンクリートセグメン
トを用いた覆工によって支保することが考えられる。
In the case of soft rock, the disposal tunnel 5 is excavated by TBM or the like.
It is conceivable to support by lining using about m of lining concrete or compressed concrete segment.

【0007】従来の竪置き方式は、図8に示すように処
分坑道の底部から処分孔を掘削し、その坑内に廃棄体を
埋め戻し材の介在の下に竪置きに定置する方法であり、
硬岩系岩盤の場合には、図8(a)のように構成されて
いる。
In the conventional vertical placing method, as shown in FIG. 8, a disposal hole is excavated from the bottom of a disposal tunnel, and the waste is placed vertically in the pit under the intervention of backfill material.
In the case of hard rock, it is configured as shown in FIG.

【0008】硬岩系岩盤の処分坑道11は、底部12が
平面に形成され、上部13は処分坑道11の幅の半分
で、垂直状に形成された側部の立上がり高さと同様の半
径で描かれた半円形状に構成されており、処分坑道11
と処分孔14との配置は、軟岩の場合よりも狭い間隔で
構成されている。
[0008] The disposal tunnel 11 for hard rock based rock has a bottom 12 formed in a plane, and an upper section 13 having a half the width of the disposal tunnel 11 and a radius similar to the rising height of the vertically formed side. Of the disposal tunnel 11
And the disposal holes 14 are arranged at smaller intervals than in the case of soft rock.

【0009】このために、処分坑道の大きさは、軟岩の
縦置きと坑道内横置き方式の中間となり、処分孔の掘削
が岩盤の安定性に与える影響も小さい。又、廃棄体15
を定置させるための機械の導入や設置は、坑道断面が比
較的大きいことによって容易であり、廃棄体15の埋設
密度を大きく確保できる。
[0009] For this reason, the size of the disposal tunnel is intermediate between the vertical placement of the soft rock and the horizontal placement in the tunnel, and the excavation of the disposal hole has little effect on the stability of the bedrock. Also, waste body 15
It is easy to introduce and install a machine for fixing the waste body 15 because the cross section of the tunnel is relatively large, and a high burial density of the waste body 15 can be secured.

【0010】一方、図8(b)に示す軟岩系岩盤の処分
坑道16は、底部17と側部18が異なる半径の円弧状
に形成され、上部13は側部18の円弧の上端から半径
が処分坑道16の幅の半分で描かれる半円形状に構成し
て、その上に厚さ50cm程度の覆工コンクリートもし
くはコンクリートセグメントを用いた覆工19を施工し
ており、処分坑道16と処分孔14との配置は、硬岩の
場合よりも広い間隔で構成されている。
On the other hand, in a disposal tunnel 16 for soft rock based rock shown in FIG. 8B, a bottom portion 17 and a side portion 18 are formed in an arc shape having different radii, and an upper portion 13 has a radius from the upper end of the arc of the side portion 18. The disposal tunnel 16 is constructed in a semicircular shape drawn by half the width of the disposal tunnel 16, and a lining 19 using a lining concrete or a concrete segment having a thickness of about 50 cm is constructed thereon. The arrangement with 14 is configured at a wider interval than in the case of hard rock.

【0011】従って、処分坑道の大きさは中程度である
が、処分孔の掘削が岩盤の安定性に与える影響は大きく
なっている。このために、廃棄体15を定置させるため
の機械の導入や設置が容易性であるものの、廃棄体15
の埋設密度はあまり大きく確保することができなくなっ
ている。
Therefore, although the size of the disposal tunnel is medium, the excavation of the disposal hole has a greater effect on the stability of the bedrock. For this reason, although it is easy to introduce and install a machine for fixing the waste body 15, the waste body 15
The burial density cannot be secured very high.

【0012】これに対して、横置き方式は、図9に示す
ように竪置き方式の処分孔に充填したものと同等な埋め
戻し材22の介在の下に、廃棄体15を横置きに掘削し
た処分坑道の軸方向に合致させるものであり、硬岩系岩
盤の場合には、処分坑道20が図9(a)のように円形
に構成されているのに対して、軟岩系岩盤の場合には、
処分坑道21を図9(b)のように上下方向の楕円形に
構成して応力度を強化している。
On the other hand, in the horizontal placement method, as shown in FIG. 9, the waste body 15 is excavated horizontally with the interposition of a backfill material 22 equivalent to that filled in the disposal hole of the vertical placement method. In the case of hard rock based rock, the disposal tunnel 20 is formed in a circular shape as shown in FIG. 9 (a), whereas in the case of soft rock based rock, In
As shown in FIG. 9B, the disposal tunnel 21 is formed in an elliptical shape in the vertical direction to enhance the stress.

【0013】従って、処分坑道はいずれも径が小さいこ
とで、処分孔の掘削が岩盤の安定性に与える影響は無
い。しかして、廃棄体15の埋設密度は程々に確保する
ことができるが、廃棄体15を定置させるための機械の
導入や設置は不利になっている。
Therefore, since the disposal tunnels are all small in diameter, the excavation of the disposal holes has no effect on the stability of the bedrock. Although the burial density of the waste body 15 can be ensured moderately, introduction and installation of a machine for fixing the waste body 15 are disadvantageous.

【0014】以上のような各処分方式における廃棄体1
5の処分作業は、先ず処分孔14や処分坑道20、21
の中に埋め戻し材を詰めてからベントナイト等から成る
埋め戻し材22を封入しており、次いで埋め戻し材の中
に廃棄体15を埋設して定置し、上記埋め戻し材の上端
や先端を蓋状の緩衝材で封鎖している。
The waste body 1 in each disposal method as described above
The disposal work of No. 5 firstly involves disposal holes 14 and disposal tunnels 20 and 21
A backfill material 22 made of bentonite or the like is sealed in the inside of the backfill material, and then a waste body 15 is buried and fixed in the backfill material. Sealed with lid-like cushioning material.

【0015】竪置き方式の処分孔14は、残余の空間に
ベントナイト等から成る埋め戻し材22をさらに封入し
ており、最終的には処分坑道11、16内まで埋め戻し
材23を充填することで廃棄体15の処分作業を完了し
ている。
The vertically disposed disposal hole 14 further encloses a backfill 22 made of bentonite or the like in the remaining space, and finally fills the inside of the disposal tunnels 11 and 16 with the backfill 23. Has completed the disposal work of the waste body 15.

【0016】[0016]

【発明が解決しようとする課題】しかして、竪置き方式
では、定置のための条件によって処分坑道や処分孔の断
面が大きくなることから、掘削や支保等の建設に係るコ
ストが嵩高になり、この傾向は、軟岩における竪置き方
式の場合に顕著になる。
However, in the vertical installation method, the cross section of the disposal tunnel and the disposal hole becomes large depending on the conditions for stationary installation, so that the cost for the construction of excavation and support is bulky, This tendency becomes conspicuous in the case of a vertical method using soft rock.

【0017】同様に、横置き方式の場合にも処分坑道の
断面が小さいことから、搬送機械を小型にする必要があ
り、円柱状で重量のある廃棄体では定置のための空間が
狭いことから、ベントナイト等の柔らかい埋め戻し材の
上に確実に定置させることは簡単でなく、相応の機構を
加味した対策が必要になる。加えて廃棄体の処分密度に
おいても処分坑道の軸方向に合致させる必要があるため
に、密度の縮小を図る点で不利である。
Similarly, also in the case of the horizontal type, since the cross section of the disposal tunnel is small, it is necessary to reduce the size of the transporting machine. However, it is not easy to securely place the material on a soft back-fill material such as bentonite, and a countermeasure considering a proper mechanism is required. In addition, the disposal density of wastes must be matched to the axial direction of the disposal tunnel, which is disadvantageous in reducing the density.

【0018】特に、廃棄体の処分密度は、地下施設部を
構成している複数の処分坑道や主要トンネルの建設長に
影響を与えることから、廃棄体の処分密度を大にして地
下施設部の構築範囲を縮小させることは、適地となる岩
盤への制約条件が緩和されることや建設コストの低減に
つながるものであり、重要な問題である。
In particular, since the disposal density of wastes affects the construction length of a plurality of disposal tunnels and main tunnels constituting the underground facility, the disposal density of the wastes is increased to increase the disposal density of the underground facilities. Reducing the construction area is an important issue because it reduces the constraints on suitable rocks and reduces construction costs.

【0019】本発明は、上述した現状に鑑みて高レベル
放射性廃棄物の処分における改善策を提案するものであ
り、廃棄体の処分密度を大にすることで地下施設部全体
を縮小し、適地となる岩盤への制約条件を緩和させ、建
設コストの低減を図ると共に、廃棄体を定置する際の操
作性を有利にする地層処分施設とその施工法を提供して
いる。
The present invention has been made in view of the above situation, and proposes an improvement measure in the disposal of high-level radioactive waste. By increasing the disposal density of wastes, the entire underground facility can be reduced, It provides a geological disposal facility and its construction method, which alleviates the constraints on the rock mass to be used, reduces the construction cost, and improves the operability when placing the waste.

【0020】[0020]

【課題を解決するための手段】本発明による地層処分施
設は、基本的に、処分坑道中に廃棄体を充填した封鎖体
を坑道軸と交差させる方向に横置きしており、具体的に
は、廃棄体を充填した封鎖体を、処分坑道中に充填され
る埋め戻し材で所定間隔で保持したり、封鎖体を、廃棄
体を緩衝材の介在の下に充填する容器から構成し、容器
を鋼材で矩形状に形成している。
The geological disposal facility according to the present invention basically has a closed body filled with a waste body in a disposal tunnel laid horizontally in a direction intersecting with a tunnel shaft. A closed body filled with waste bodies is held at a predetermined interval by a backfill material filled in a disposal tunnel, or a closed body is constituted by a container for filling a waste body under the intervention of a buffer material, Is formed in a rectangular shape with a steel material.

【0021】これによって、廃棄体の処分密度を大にし
て地下施設部全体を縮小させると共に、封鎖体の定置性
を向上させ、適地となる岩盤への制約条件を緩和させて
建設コストの低減を図っている。
[0021] As a result, the disposal density of the waste is increased to reduce the size of the entire underground facility, and the emplacement of the closed body is improved, and the constraints on the suitable rock are reduced, thereby reducing the construction cost. I'm trying.

【0022】本発明による地層処分施設の施工法は、上
記地層処分施設の施工法であって、処分坑道中に緩衝材
を介在させて廃棄体を充填した封鎖体を坑道軸と交差さ
せる方向に横置きに配置し、埋め戻し材で所定間隔に保
持することから成り、処分坑道中の埋め戻し材を、第1
に廃棄体を充填した封鎖体の下部部分に充填し、封鎖体
を横置きに配置した後に封鎖体の上部部分と次いで配置
される廃棄体を充填した封鎖体の位置までの処分坑道中
とを埋め戻し材で充填することを特徴にしている。
The method for constructing a geological disposal facility according to the present invention is a method for constructing a geological disposal facility according to the present invention, in which a sealed body filled with waste is interposed with a shaft through a buffer material in a disposal tunnel. It is arranged horizontally and is held at a predetermined interval by a backfill material.
After filling the lower part of the sealed body filled with the waste, and placing the sealed body horizontally, the upper part of the sealed body and the disposal mine to the position of the sealed body filled with the waste to be disposed next are disposed. It is characterized by filling with backfill material.

【0023】これによって、廃棄体の処分密度を大にし
て地下施設部全体を縮小させると共に、廃棄体を定置す
る際の操作性を有利にしている。
As a result, the disposal density of the wastes is increased to reduce the size of the entire underground facility, and the operability in placing the wastes is advantageous.

【0024】[0024]

【発明の実施の形態】本発明による地層処分施設は、処
分坑道中に廃棄体を充填した封鎖体を坑道軸と交差させ
る方向に横置きしており、具体的には、廃棄体を充填し
た封鎖体を、処分坑道中に充填される埋め戻し材で所定
間隔で保持したり、封鎖体を、廃棄体を緩衝材の介在の
下に充填する容器から構成し、容器を鋼材で矩形状に形
成している。
BEST MODE FOR CARRYING OUT THE INVENTION In a geological disposal facility according to the present invention, a closed body filled with waste bodies is placed in a disposal tunnel in a direction intersecting with a shaft of a tunnel, and specifically, a waste body is filled with the waste bodies. The sealing body is held at a predetermined interval by a backfill material filled in the disposal tunnel, or the sealing body is formed of a container in which the waste body is filled under the intervention of the buffer material, and the container is made of steel and has a rectangular shape. Has formed.

【0025】以下に、各発明の実施の形態を図面に基づ
いて詳細に説明するが、発明の特徴を明確にするため
に、従来と同様の部分については同じ符号で表示してい
る。
Hereinafter, embodiments of each invention will be described in detail with reference to the drawings. In order to clarify the features of the invention, parts similar to those in the related art are denoted by the same reference numerals.

【0026】図1は、軟岩の地層に本発明による地層処
分施設を適用した場合の処分坑道の実施の形態を示す断
面図である。
FIG. 1 is a sectional view showing an embodiment of a disposal tunnel when the geological disposal facility according to the present invention is applied to a soft rock formation.

【0027】複数の処分坑道5は、従来の軟岩系岩盤に
構築される竪置き方式の処分坑道16と同様に形成され
るが、その底部に掘削されていた処分孔14は形成され
ていない形状に構成されている。
The plurality of disposal tunnels 5 are formed in the same manner as the vertical disposal tunnel 16 constructed on a conventional soft rock mass, but the disposal hole 14 excavated at the bottom is not formed. Is configured.

【0028】即ち、処分坑道5は、底部17を所定半径
の円弧状に形成しており、その側部18も底部17とは
異なる半径の円弧状に形成している。側部18に継続し
ている上部12は、側部18の円弧の上端から半径が処
分坑道5の幅の半分で描かれる半円形状に構成されてお
り、処分坑道5の配置は、従来と同様に硬岩の場合より
も広い間隔で構成される。
That is, the disposal tunnel 5 has a bottom portion 17 formed in an arc shape having a predetermined radius, and a side portion 18 formed in an arc shape having a radius different from that of the bottom portion 17. The upper portion 12 continuing to the side portion 18 is formed in a semicircular shape whose radius is drawn by half the width of the disposal tunnel 5 from the upper end of the arc of the side portion 18, and the disposal tunnel 5 is arranged in a conventional manner. Similarly, they are arranged at wider intervals than in the case of hard rock.

【0029】従って、本発明における処分坑道は、従来
の横置き方式と比較して断面を大きくしていることで、
空間的な余裕や大型機械の使用を許容することになり、
廃棄体を充填した封鎖体を定置する際の操作性を容易に
して作業を有利にしている。
Therefore, the disposal tunnel according to the present invention has a larger cross section than the conventional horizontal installation method,
Space allowance and the use of large machines,
The operability at the time of placing the closed body filled with the waste body is facilitated to make the operation advantageous.

【0030】尚、本発明を構成している処分坑道は、従
来の竪置き方式の処分坑道と同様の形状寸法に形成され
るものであるから、地層が硬岩の場合には、そこに構築
される処分坑道は、従来の硬岩における竪置き方式の処
分坑道と同様の形状寸法に形成されることになる。
Since the disposal tunnel constituting the present invention is formed in the same shape and size as the conventional vertical disposal tunnel, when the formation is hard rock, it is constructed there. The disposal tunnel to be used is formed in the same shape and size as the conventional disposal tunnel of hard rock.

【0031】図2において詳述する、廃棄体15を充填
した封鎖体30は、処分形態として処分坑道5に充填し
た埋め戻し材23の中に横置きに配置するものである
が、横置きの方向は、従来の横置き方式と異なり、坑道
軸に対して交差する配置状態にしている。
The sealing body 30 filled with the waste body 15, which will be described in detail in FIG. 2, is disposed horizontally in the backfill material 23 filled in the disposal tunnel 5 as a disposal form. The direction is different from the conventional horizontal type, and is arranged to intersect with the shaft axis.

【0032】従って、封鎖体30の配置間隔は、従来の
横置き方式の配置間隔に準じて行われるので、竪置き方
式の場合よりも狭い間隔で配置することが可能であり、
軟岩の場合には特に間隔が狭くなり、半分以下の間隔で
配置することが可能になるので廃棄体の処分密度を大幅
に高めることができる。
Therefore, the spacing between the sealing bodies 30 is determined according to the conventional spacing of the horizontal arrangement, so that they can be arranged at a smaller interval than in the case of the vertical arrangement.
In the case of soft rocks, the intervals are particularly narrow, and it is possible to arrange them at an interval of less than half.

【0033】以上のように、封鎖体30は処分坑道5を
充填している埋め戻し材23の中に保持されるものであ
るが、その配置は、第1に封鎖体30の下部部分に相当
する範囲を埋め戻し材31で充填して、封鎖体30を配
置する位置が安定的に確保されるようにしており、次い
で、封鎖体30が横置きに配置された後に、封鎖体の上
部部分と次に所定の間隔で配置される封鎖体の位置まで
埋め戻し材23によってさらに充填するものであり、こ
れによって1個の封鎖体30を定置させることにして、
これを作業の基準形態にしている。
As described above, the sealing body 30 is held in the backfill material 23 filling the disposal tunnel 5, and its arrangement corresponds to the lower part of the sealing body 30 first. The area to be sealed is filled with the backfill material 31 so that the position where the sealing body 30 is arranged is stably secured. Then, after the sealing body 30 is arranged horizontally, the upper part of the sealing body is Then, the backfilling material 23 is further filled up to the position of the sealing body arranged at a predetermined interval, whereby one sealing body 30 is fixed.
This is the standard form of work.

【0034】廃棄体15は、高レベル放射性廃棄物を地
層処分施設に埋設するために形成されたものであり、高
レベル放射性廃棄物の廃液をガラス固化体にして、これ
を金属容器に格納したものである。
The waste 15 is formed for embedding high-level radioactive waste in a geological disposal facility. The waste liquid of the high-level radioactive waste is turned into a vitrified body, which is stored in a metal container. Things.

【0035】従来は、廃棄体15を地下水に触れさせな
いように厳重に処分するために、処分孔の周辺壁と処分
坑道の底部を含めた周辺岩盤の安定性を確保すると同時
に、処分孔内にベントナイト等から成る埋め戻し材を配
置して、この埋め戻し材中に廃棄体15を定置するとい
う複数の工程からなる作業を構成していた。
Conventionally, in order to dispose the waste body 15 strictly so as not to come into contact with the groundwater, the stability of the surrounding rock including the peripheral wall of the disposal hole and the bottom of the disposal tunnel is secured, An operation consisting of a plurality of steps of arranging a backfill material made of bentonite or the like and placing the waste body 15 in the backfill material has been configured.

【0036】しかして、本発明の場合には、上記のよう
な処分孔の埋設仕様を図2に示すような一体の封鎖体3
0として構成することで達成しており、これによって、
廃棄体15の定置に安定性を確保すると同時に、作業の
簡素化を図って施工効率を向上させている。
In the case of the present invention, however, the above-described disposal hole burying specification is changed to the integral sealing member 3 as shown in FIG.
This is achieved by configuring as 0.
At the same time, the stability of the disposal of the waste body 15 is ensured, and at the same time, the work is simplified to improve the construction efficiency.

【0037】本実施の形態における封鎖体30は、矩形
状の鋼材製容器32の内部に廃棄体15とこれを安定的
に保持する緩衝材33を予め充填することで構成されて
おり、廃棄体を埋設処分する際の取り扱いを容易にする
と同時に、矩形体にすることで定置における安定性を確
実にしている。
The sealing body 30 in the present embodiment is configured by previously filling a waste body 15 and a buffer material 33 for stably holding the waste body 15 in a rectangular steel container 32. In addition, it is easy to handle when disposing of burial, and at the same time, by making it a rectangular body, stability in stationary is ensured.

【0038】以上のように、本発明による地層処分施設
は、処分坑道中に廃棄体を充填した封鎖体を坑道軸と交
差させる方向に横置きにしているので、軟岩の地層にお
いても廃棄体の処分密度を大にして地下施設部全体を縮
小させると共に、封鎖体の定置性を向上させ、適地とな
る岩盤への制約条件を緩和させて建設コストを低減する
ことができる。
As described above, in the geological disposal facility according to the present invention, the closed body filled with waste in the disposal tunnel is laid horizontally in the direction intersecting with the shaft of the tunnel, so that the disposal of waste in the soft rock stratum is also possible. It is possible to increase the disposal density and reduce the size of the entire underground facility, improve the emplacement of the sealing body, and reduce the constraints on the suitable rock, thereby reducing the construction cost.

【0039】次に、本発明による地層処分施設の施工法
について説明する。本発明による地層処分施設の施工法
は、上記地層処分施設の施工法であって、処分坑道中に
緩衝材を介在させて廃棄体を充填した封鎖体を坑道軸と
交差させる方向に横置きに配置し、埋め戻し材で所定間
隔に保持することから成り、処分坑道中の埋め戻し材
を、第1に廃棄体を充填した封鎖体の下部部分に充填
し、封鎖体を横置きに配置した後に封鎖体の上部部分と
次いで配置される廃棄体を充填した封鎖体の位置までの
処分坑道中とを埋め戻し材で充填することを特徴にして
いる。
Next, the construction method of the geological disposal facility according to the present invention will be described. The method for constructing a geological disposal facility according to the present invention is a method for constructing a geological disposal facility according to the above, wherein the sealing body filled with waste is interposed with a buffer material in a disposal tunnel, and is placed horizontally in a direction to intersect with a tunnel shaft. And placing the backfill material in the disposal tunnel in the lower part of the sealed body filled with waste first, and placing the sealed body horizontally. Later, the upper part of the sealing body and the inside of the disposal tunnel up to the position of the sealing body filled with the waste to be disposed are filled with the backfill material.

【0040】以下に、本発明による地層処分施設の施工
法について実施の形態を図3〜6に基づいて詳細に説明
する。
An embodiment of a method for constructing a geological disposal facility according to the present invention will be described below in detail with reference to FIGS.

【0041】図3は、処分坑道の構築状態を示してい
る。図示のように、地層処分施設の処分坑道5は、底部
17を所定半径の円弧状に形成し、その側部18も底部
17とは異なる半径の円弧状に形成しており、側部18
に継続している上部12は、側部18の円弧の上端から
半径が処分坑道5の幅の半分で描かれる半円形状に構成
される断面形状に掘削され、内面に覆工19を施工して
いる。
FIG. 3 shows a construction state of the disposal tunnel. As shown in the drawing, the disposal tunnel 5 of the geological disposal facility has a bottom portion 17 formed in an arc shape having a predetermined radius, and a side portion 18 formed in an arc shape having a different radius from the bottom portion 17.
Is excavated from the upper end of the arc of the side portion 18 into a cross-sectional shape composed of a semicircle whose radius is drawn by half the width of the disposal tunnel 5, and a lining 19 is constructed on the inner surface. ing.

【0042】そして、隣接する処分坑道5の配置は、従
来と同様に硬岩の場合よりも広い間隔になるように構成
されることになる。
Then, the adjacent disposal tunnels 5 are arranged so as to have a wider interval than in the case of hard rock as in the related art.

【0043】図4は、処分坑道中に埋め戻し材を充填す
る第1の段階を示している。処分坑道5の中に充填する
埋め戻し材35は、図示のように腰掛け状の台座36を
設けるように形成される。台座36は、処分坑道5にお
いて封鎖体30を定置する高さに設定されており、封鎖
体30が矩形状であることに対応させて安定的に静置さ
れるように平面状に整地されている。
FIG. 4 shows a first stage of filling backfill material into a disposal tunnel. The backfill material 35 to be filled in the disposal tunnel 5 is formed so as to provide a pedestal 36 as shown in the figure. The pedestal 36 is set at a height at which the sealing body 30 is set in the disposal tunnel 5, and is leveled in a planar shape so that the sealing body 30 is stably stood still in correspondence with the rectangular shape of the sealing body 30. I have.

【0044】本台座36の形成は、処分坑道中の広い空
間の下に大型機械の自由な稼働によって容易に施工する
ことが可能であり、台座36の施工によって以降の封鎖
体30の処分作業を極めて容易にしている。
The pedestal 36 can be easily formed by free operation of a large machine under a wide space in the disposal tunnel, and the pedestal 36 can be used to dispose of the sealing body 30 thereafter. Very easy.

【0045】図5は、封鎖体を定置する過程を示してい
る。封鎖体30の定置は、台座36の上に搬入してきた
封鎖体30を安置するだけで確実に実施できるものであ
り、封鎖体30が矩形状の鋼材製容器32の内部に廃棄
体15とこれを安定的に保持する埋め戻し材33を予め
充填してあることで、廃棄体15は、結果的に処分坑道
5の所定位置に配置されて、確実に埋設処分されること
になる。
FIG. 5 shows the process of placing the blocker. The stationary body 30 can be securely placed only by placing the closed body 30 carried on the pedestal 36, and the closed body 30 is disposed inside the rectangular steel material container 32 and the waste body 15 Is preliminarily filled with the backfill material 33 that stably holds the wastewater, the waste body 15 is eventually disposed at a predetermined position of the disposal tunnel 5 and is reliably buried and disposed.

【0046】図6は、定置した封鎖体を埋め戻し材で封
鎖する過程を示している。封鎖体30を定置した後は、
封鎖体30の上部と所定の間隔で定置される予定の想像
線で示す封鎖体の位置までの空間を埋め戻し材36で充
填しており、これによって封鎖体30を埋設処分する作
業工程を完了する。
FIG. 6 shows a process of closing the fixed sealing body with the backfill material. After placing the blocker 30,
The space up to the position of the sealing body indicated by an imaginary line to be placed at a predetermined interval from the upper part of the sealing body 30 is filled with the backfill material 36, thereby completing the work process of embedding and disposing of the sealing body 30. I do.

【0047】このような埋め戻し材36の充填作業も、
矩形状の鋼材製容器32を平面状の台座36の上に安置
してあるので、埋め戻し材36によって移動する危惧が
ないことから迅速に遂行できる。、封鎖体30を継続し
て埋設処分する以降の作業は、上記の工程を反復するこ
とで連続的に実施され、一つの処分坑道における封鎖体
の処分作業を終了する。
The filling operation of the backfill material 36 is also performed as follows.
Since the rectangular steel container 32 is placed on the flat pedestal 36, there is no danger that the container 32 is moved by the backfill material 36, so that the process can be performed quickly. The operations after the sealing body 30 is continuously buried and disposed are continuously performed by repeating the above-described steps, and the disposal work of the sealing body in one disposal tunnel is completed.

【0048】以上のように、本発明による地層処分施設
の施工法は、処分坑道を構築してから埋め戻し材を充填
し、その上に封鎖体を坑道軸に交差させる方向に横置き
に配置した後に、封鎖体の上部部分と次に配置される封
鎖体の位置までの処分坑道中とを埋め戻し材で充填して
いるので、廃棄体の処分密度を大にして地下施設部全体
を縮小させると共に、廃棄体を定置する際の操作性を有
利にすることができる。
As described above, according to the construction method of the geological disposal facility according to the present invention, the disposal tunnel is constructed, the backfill material is filled, and the sealing body is placed on the disposal tunnel in a direction crossing the tunnel axis. After that, the upper part of the sealed body and the inside of the disposal tunnel up to the position of the next sealed body are filled with backfill material, so the disposal density of waste is increased and the entire underground facility part is reduced At the same time, the operability when placing the waste body can be made advantageous.

【0049】以上、本発明を実施の形態に基づいて詳細
に説明してきたが、本発明による地層処分施設とその施
工法は、上記実施の形態に何ら限定されるものでなく、
本発明の趣旨を逸脱しない範囲において種々の変更が可
能であることは当然のことである。
As described above, the present invention has been described in detail based on the embodiments. However, the geological disposal facility according to the present invention and its construction method are not limited to the above-described embodiments.
Naturally, various modifications can be made without departing from the spirit of the present invention.

【0050】[0050]

【発明の効果】請求項1に記載の発明である地層処分施
設は、処分坑道中に廃棄体を充填した封鎖体を坑道軸と
交差させる方向に横置きしているので、以下の効果を奏
している。 処分坑道の断面積が大きいので、空間的な余裕や大
型機械の使用を可能にして廃棄体を充填した封鎖体を定
置する際の操作性を有利にする。 処分孔を掘削しないので、処分坑道の安定性を向上
させる。 廃棄体の処分密度を高くするので、処分施設全体を
小さくして処分施設の適地を拡大し建設コストを低減し
て経済性を向上させる。
The geological disposal facility according to the first aspect of the present invention has the following effects because the closed body filled with wastes is placed in the disposal tunnel in a direction intersecting with the shaft of the tunnel. ing. The large cross-sectional area of the disposal tunnel allows for ample space and the use of large machines, which facilitates the operability of placing the closed body filled with waste. Since the disposal hole is not excavated, the stability of the disposal tunnel is improved. Since the disposal density of wastes is increased, the entire disposal facility is made smaller, suitable sites for the disposal facility are expanded, construction costs are reduced, and economy is improved.

【0051】請求項2に記載の発明である地層処分施設
は、請求項1に記載の地層処分施設において、廃棄体を
充填した封鎖体を、処分坑道中に充填される埋め戻し材
で所定間隔で保持することを特徴としているので、上記
効果に加えて、廃棄体の処分密度を高くする配置を確実
にする効果を奏している。
The geological disposal facility according to the second aspect of the present invention is the geological disposal facility according to the first aspect, wherein the closed body filled with the waste is separated by a backfill material filled in the disposal tunnel at a predetermined interval. In this case, in addition to the above-described effects, an effect of ensuring an arrangement for increasing the disposal density of the waste body is achieved.

【0052】請求項3に記載の発明である地層処分施設
は、請求項1又は2に記載の地層処分施設において、廃
棄体を充填した封鎖体を、緩衝材の介在の下に廃棄体を
充填する容器から構成することを特徴としているので、
上記効果に加えて、廃棄体の埋設仕様を確実に確保する
効果を奏している。
The geological disposal facility according to the third aspect of the present invention is the geological disposal facility according to the first or second aspect, wherein the closed body filled with the waste is filled with the waste under the intervention of the buffer material. It is characterized by comprising a container that
In addition to the above effects, there is an effect that the specification for burying the waste is surely secured.

【0053】請求項4に記載の発明である地層処分施設
は、請求項1乃至3のいずれかに記載の地層処分施設に
おいて、容器を、矩形状に形成することを特徴としてい
るので、上記効果に加えて、廃棄体を定置する際の安定
性を確保する効果を奏している。
The geological disposal facility according to the fourth aspect of the present invention is characterized in that, in the geological disposal facility according to any one of the first to third aspects, the container is formed in a rectangular shape. In addition to the above, there is an effect of securing stability when placing the waste body.

【0054】請求項5に記載の発明である地層処分施設
は、請求項1乃至4のいずれかに記載の地層処分施設に
おいて、容器を、鋼材で形成することを特徴としている
ので、上記効果に加えて、廃棄体を地下水に触れさせな
いように厳重に処分し、併せて鋼材が腐食することで周
辺を還元域に構成して廃棄体を格納したオーバーパック
等の金属容器の腐食速度を低減できる効果を奏してい
る。
The geological disposal facility according to the fifth aspect of the present invention is characterized in that, in the geological disposal facility according to any one of the first to fourth aspects, the container is formed of a steel material. In addition, the waste is disposed of strictly so as not to come into contact with the groundwater, and at the same time, the corrosion of the steel material reduces the corrosion rate of metal containers such as overpacks that store the waste and constitute the surrounding area as a reduction zone. It has an effect.

【0055】請求項6に記載の発明である地層処分施設
の施工法は、請求項1乃至5のいずれかに記載の地層処
分施設の施工法であって、処分坑道中に緩衝材を介在さ
せて廃棄体を充填した封鎖体を坑道軸と交差させる方向
に横置きに配置し、埋め戻し材で所定間隔に保持するこ
とから成るので、廃棄体の処分密度を大にして地下施設
部全体を縮小させると共に、廃棄体を定置する際の操作
性を有利にする効果を奏している。
The construction method for a geological disposal facility according to the invention according to claim 6 is the construction method for a geological disposal facility according to any one of claims 1 to 5, wherein a buffer material is interposed in the disposal tunnel. The closed body filled with waste is placed horizontally in the direction intersecting with the tunnel shaft, and it is held at a predetermined interval with backfill material, so the disposal density of waste is increased and the entire underground facility is This has the effect of reducing the size and improving the operability when placing the waste body.

【0056】請求項7に記載の発明である地層処分施設
の施工法は、請求項6に記載の地層処分施設の施工法で
あって、処分坑道中の埋め戻し材を、第1に廃棄体を充
填した封鎖体の下部部分に充填し、封鎖体を横置きに配
置した後に封鎖体の上部部分と次いで配置される廃棄体
を充填した封鎖体の位置までの処分坑道中とに充填する
ことを特徴としているので、上記効果に加えて、封鎖体
の定置作業を迅速に遂行する効果を奏している。
The method for constructing a geological disposal facility according to claim 7 is the method for constructing a geological disposal facility according to claim 6, wherein the backfill material in the disposal tunnel is firstly disposed of by a waste body. After filling the lower part of the sealed body filled with, and placing the sealed body horizontally, filling the upper part of the sealed body and then the waste to be disposed into the disposal tunnel up to the position of the filled sealed body Therefore, in addition to the above-described effects, an effect of rapidly performing the operation of placing the sealing body is exhibited.

【図面の簡単な説明】[Brief description of the drawings]

【 図1】本発明の地層処分施設における処分坑道の断
面図
FIG. 1 is a sectional view of a disposal tunnel in a geological disposal facility of the present invention.

【 図2】本発明の地層処分施設に用いる封鎖体の斜視
断面図
FIG. 2 is a perspective sectional view of a sealing body used in the geological disposal facility of the present invention.

【 図3】本発明の地層処分施設の施工法における処分
坑道の施工図
Fig. 3 Construction drawing of disposal tunnel in construction method of geological disposal facility of the present invention

【 図4】本発明の地層処分施設の施工法における処分
坑道への埋め戻し材の充填図
FIG. 4 is a diagram of filling a backfill material into a disposal tunnel in the construction method of the geological disposal facility of the present invention.

【 図5】本発明の地層処分施設の施工法における処分
坑道への封鎖体の定置図
FIG. 5 is a diagram showing a stationary body installed in a disposal tunnel in the construction method of the geological disposal facility of the present invention.

【 図6】本発明の地層処分施設の施工法における処分
坑道への埋め戻し材の充填図
FIG. 6 is a diagram of filling a backfill material into a disposal tunnel in the construction method of the geological disposal facility of the present invention.

【 図7】従来工法による地層処分施設の斜視図FIG. 7 is a perspective view of a conventional geological disposal facility.

【 図8】従来工法による竪置き方式の処分坑道と処分
孔の断面図
FIG. 8 is a cross-sectional view of a conventional disposal tunnel and a disposal hole using the conventional method.

【 図9】従来工法による横置き方式の処分坑道の断面
FIG. 9 is a cross-sectional view of a horizontal disposal tunnel using a conventional method.

【符号の説明】[Explanation of symbols]

1 地下施設部、 2 地上受入施設、 3 立坑、
4 排気立坑、5 処分坑道、 6 主要トンネル、
7 廃棄体搬入立坑、8 資材立坑、 9 緊急用立
坑、 10 地層処分施設、11、16 処分坑道、
12、17 底部、 13 上部、14 処分孔、 1
5 廃棄体、 18 側部、 19 覆工、20、21
処分坑道、 22、23 埋め戻し材、30 封鎖
体、 31、35 埋め戻し材、 32 鋼材製容器、
33 緩衝材、 36 台座、
1 Underground facility, 2 Ground receiving facility, 3 Shaft,
4 exhaust shaft, 5 disposal tunnel, 6 main tunnel,
7 waste loading shaft, 8 material shaft, 9 emergency shaft, 10 geological disposal facility, 11, 16 disposal tunnel,
12, 17 bottom, 13 top, 14 disposal hole, 1
5 waste, 18 side, 19 lining, 20, 21
Disposal tunnel, 22, 23 backfill material, 30 sealing body, 31, 35 backfill material, 32 steel container,
33 cushioning material, 36 pedestals,

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 処分坑道中に廃棄体を充填した封鎖体を
坑道軸と交差させる方向に横置きする地層処分施設。
1. A geological disposal facility in which a closed body filled with a waste body in a disposal tunnel is placed horizontally in a direction intersecting with a tunnel shaft.
【請求項2】 廃棄体を充填した封鎖体が、処分坑道中
に充填される埋め戻し材で所定間隔で保持されることを
特徴とする請求項1に記載の地層処分施設。
2. The geological disposal facility according to claim 1, wherein the closed body filled with the waste is held at predetermined intervals by a backfill material filled in a disposal tunnel.
【請求項3】 廃棄体を充填した封鎖体が、廃棄体を緩
衝材の介在の下に充填する容器から成ることを特徴とす
る請求項1又は2に記載の地層処分施設。
3. The geological disposal facility according to claim 1, wherein the closed body filled with the waste body comprises a container for filling the waste body with a buffer material interposed therebetween.
【請求項4】 容器が、矩形状に形成されることを特徴
とする請求項1乃至3のいずれかに記載の地層処分施
設。
4. The geological disposal facility according to claim 1, wherein the container is formed in a rectangular shape.
【請求項5】 容器が、鋼材で形成されることを特徴と
する請求項1乃至4のいずれかに記載の地層処分施設。
5. The geological disposal facility according to claim 1, wherein the container is formed of a steel material.
【請求項6】 処分坑道中に緩衝材を介在させて廃棄体
を充填した封鎖体を坑道軸と交差させる方向に横置きに
配置し、埋め戻し材で所定間隔に保持することから成る
請求項1乃至5のいずれかに記載の地層処分施設の施工
法。
6. A closed body filled with waste bodies with a buffer material interposed in a disposal tunnel, placed horizontally in a direction intersecting with the tunnel shaft, and held at predetermined intervals by backfilling material. 6. The construction method for a geological disposal facility according to any one of 1 to 5.
【請求項7】 処分坑道中の埋め戻し材が、第1に廃棄
体を充填した封鎖体の下部部分に充填され、該封鎖体を
横置きに配置した後に封鎖体の上部部分と次いで配置さ
れる廃棄体を充填した封鎖体の位置までの処分坑道中と
に充填されることを特徴とする請求項6に記載の地層処
分施設の施工法。
7. The backfill material in the disposal tunnel is first filled in the lower part of the closure filled with waste, and after placing the closure horizontally, it is placed next to the upper part of the closure. 7. The method for constructing a geological disposal facility according to claim 6, wherein the filling is performed in a disposal tunnel up to a position of the sealing body filled with the waste body.
JP2001011184A 2001-01-19 2001-01-19 Geological disposal facility and its execution method Pending JP2002214394A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008013964A (en) * 2006-07-04 2008-01-24 Shimizu Corp Gallery closing method and gallery closing apparatus
US8127234B2 (en) 2007-01-12 2012-02-28 Fujitsu Limited Display screen structuring apparatus
JP2008196232A (en) * 2007-02-14 2008-08-28 Shimizu Corp Gallery closing apparatus and gallery closing method
JP2015072154A (en) * 2013-10-02 2015-04-16 株式会社大林組 Radioactive waste disposal facility and construction method of the same
CN106338409A (en) * 2016-08-31 2017-01-18 中南大学 Tunnel-bottom-structure stress-state accurate-simulation indoor test apparatus
CN106338409B (en) * 2016-08-31 2018-07-24 中南大学 A kind of tunnel bottom structural stress state accurately simulates laboratory testing rig

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