JP2002307425A - Method for manufacture of back filling grout material - Google Patents
Method for manufacture of back filling grout materialInfo
- Publication number
- JP2002307425A JP2002307425A JP2001109641A JP2001109641A JP2002307425A JP 2002307425 A JP2002307425 A JP 2002307425A JP 2001109641 A JP2001109641 A JP 2001109641A JP 2001109641 A JP2001109641 A JP 2001109641A JP 2002307425 A JP2002307425 A JP 2002307425A
- Authority
- JP
- Japan
- Prior art keywords
- mortar
- water
- slurry
- grout material
- mixed
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Lining And Supports For Tunnels (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、裏込めグラウト
材の製造方法に関し、特に、トンネル裏込めに用いるグ
ラウト材を、モルタルとベントナイトなどの膨潤性材料
とを混合して作製する方法の改良技術に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a backfill grout, and more particularly, to an improved technique for producing a grout used for tunnel backfill by mixing mortar and a swellable material such as bentonite. It is about.
【０００２】[0002]
【従来の技術】山岳トンネルの裏込め注入に使用される
グラウト材には、必要な個所、例えば、空洞部にだけ充
填することができる限定注入を可能にするために、加圧
や振動の印加により容易に流動する可塑性を備えている
ことが望ましい。2. Description of the Related Art Grouting materials used for backfilling of mountain tunnels are subjected to application of pressure or vibration in order to enable limited injection that can be filled only in necessary places, for example, cavities. It is desirable to have plasticity that flows more easily.
【０００３】そこで、従来は、この種のグラウト材とし
て、モルタルに水膨潤性のベントナイトを添加して、可
塑性を得るようにしていた。このような構成のグラウト
材は、通常、構築するトンネルの坑口近傍に、セメン
ト，ベントナイト，細骨材の収納サイロを設置し、注入
作業を行うときに、サイロから必要な量の材料を計量器
で計量し、ミキサーなどの機械を使用して、グラウト材
を製造し、その後これを坑内に搬入して、空洞部に注入
していた。Therefore, conventionally, as this kind of grout material, water swellable bentonite has been added to mortar to obtain plasticity. Grout materials of this configuration are usually installed near the wellhead of the tunnel to be built by installing silos containing cement, bentonite, and fine aggregate, and when injecting, the required amount of material is weighed from the silo. The grout was manufactured using a machine such as a mixer, and then the grout was transported into a downhole and injected into a cavity.
【０００４】ところが、このような裏込めグラウト材の
製造方法には、以下に説明する課題があった。However, such a method for producing a backfill grout has the following problems.
【０００５】[0005]
【発明が解決しようとする課題】すなわち、上述した従
来の製造方法では、構築するトンネルの坑口近傍に、セ
メント，ベントナイト，細骨材の収納サイロを設置し、
計量器やミキサなどもサイロの近傍に隣接設置していた
ので、抗口近傍に広い敷地が必要となり、また、グラウ
ト材を製造する際には、計量器やミキサなどの操作に複
数の作業員が必要になり、敷地の確保ができない場合に
は、施工が困難になるとともに、コストも高くなるとい
う問題があった。That is, in the above-described conventional manufacturing method, a silo for storing cement, bentonite, and fine aggregate is installed near the wellhead of a tunnel to be constructed.
Since measuring instruments and mixers were also installed adjacent to the silo, a large site was required near the entrance, and when manufacturing grout materials, multiple workers were required to operate the measuring instruments and mixers. If the site cannot be secured, there is a problem that the construction becomes difficult and the cost increases.
【０００６】また、トンネルの裏込め注入は、ある時期
に集中して大量に注入する場合があるが、このような場
合に、計量器で複数種の材料を正確に計量するには、時
間がかかり、注入作業の施工能率も低下する。In addition, backfilling of a tunnel may be performed in a large amount at a certain time in a concentrated manner. In such a case, it takes time to accurately measure a plurality of types of materials with a measuring device. As a result, the efficiency of the injection work is also reduced.
【０００７】さらに、グラウト材の作製から注入までに
時間がかかると、セメントの硬化反応の進行などにより
粘性が大きくなって、グラウト材の圧送可能な距離が短
くなり、長距離トンネルの中央部での注入に適用するこ
とが困難になるという問題もあった。Further, if it takes a long time from the production of the grout material to the injection thereof, the viscosity increases due to the progress of the hardening reaction of the cement and the like, and the distance that the grout material can be pumped becomes short. In addition, there is a problem that it is difficult to apply the method to the injection of a gas.
【０００８】本発明は、このような従来の問題点に鑑み
てなされたものであって、その目的とするところは、抗
口近傍に広い敷地を必要とせず、製造コストの低減と、
注入作業能率の低下を防止し、かつ、長距離圧送が可能
になる裏込めグラウト材の製造方法を提供することにあ
る。The present invention has been made in view of such conventional problems, and has as its object to reduce the manufacturing cost without requiring a large site near the entrance.
It is an object of the present invention to provide a method for producing a backfill grout material that can prevent a decrease in injection work efficiency and enables long-distance pumping.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、水と、水硬性セメントと、ベントナイト
などの水膨潤性物質と、骨材と、硬化遅延剤とを含む裏
込めグラウト材の製造方法において、前記水膨潤性物質
と前記水とを、トンネル抗口近傍で混合・攪拌してスラ
リーを作製し、前記セメントと骨材および水とをレディ
ーミクスコンクリート工場で混合してモルタルを作製
し、作製された前記モルタルを、運搬車の混合，攪拌が
可能なドラムに収容してトンネル構築現場まで運搬し、
前記ドラム内に収納されている前記モルタルに前記スラ
リーと硬化遅延剤とを添加した後に、混合攪拌してグラ
ウト材を作製するようにした。In order to achieve the above object, the present invention provides a backfill containing water, a hydraulic cement, a water-swellable substance such as bentonite, an aggregate, and a setting retarder. In the method for producing a grout material, the water-swellable substance and the water are mixed and stirred in the vicinity of a tunnel opening to produce a slurry, and the cement, aggregate and water are mixed in a ready-mix concrete plant. A mortar is prepared, and the prepared mortar is housed in a drum capable of mixing and stirring in a transport vehicle and transported to a tunnel construction site.
After the slurry and the curing retarder were added to the mortar stored in the drum, the mixture was stirred to produce a grout material.
【００１０】このように構成した裏込めグラウト材の製
造方法によれば、トンネル抗口近傍では、水膨潤性物質
と水とを混合・攪拌してスラリーを作製するだけなの
で、それほど広い敷地面積を必要としない。According to the method for manufacturing the backfill grout material configured as described above, a slurry is prepared only by mixing and agitating the water-swellable substance and water in the vicinity of the tunnel entrance, so that a large site area is required. do not need.
【００１１】また、モルタルは、セメントと骨材および
水とをレディーミクスコンクリート工場で混合して作製
し、作製されたモルタルを、運搬車の混合，攪拌が可能
なドラムに収容してトンネル構築現場まで運搬し、ドラ
ム内に収納されているモルタルにスラリーを添加した後
に、混合攪拌してグラウト材を作製するので、作業員
は、スラリーの作製およびその添加要員だけで済む。The mortar is prepared by mixing cement, aggregate and water in a ready-mix concrete factory, and the prepared mortar is housed in a drum which can be mixed and stirred by a transport vehicle, and a tunnel construction site is prepared. After the slurry is added to the mortar housed in the drum and mixed and stirred to produce the grout material, only a worker for preparing and adding the slurry is required.
【００１２】さらに、モルタルは、レディーミクスコン
クリート工場で作製するので、高品質のものを大量に安
定した状態で、必要に応じて供給することができる。Further, since the mortar is manufactured at a ready-mix concrete factory, a high-quality mortar can be supplied in a stable state in a large amount as required.
【００１３】また、本発明では、水膨潤性物質と水と混
合・攪拌してスラリーを作製し、作製されたスラリーを
モルタルと混練するので、水硬性セメントの水和により
発生するカルシウムイオンが、水膨潤性物質を膨潤させ
る際に存在しないので、カルシウムイオンが水膨潤性物
質の膨潤作用に影響を及ぼすことがなくなる。Further, in the present invention, a slurry is prepared by mixing and stirring the water-swellable substance and water, and the prepared slurry is kneaded with mortar. Therefore, calcium ions generated by hydration of hydraulic cement are Since it is not present when swelling the water-swellable substance, calcium ions do not affect the swelling action of the water-swellable substance.
【００１４】さらにまた、ベントナイトをモルタルに添
加した裏込め注入用のグラウト材は、粘性が大きくなる
ことから、注入可能な施工範囲が、坑口からの圧送可能
な距離により制限を受けて、長距離トンネルの場合に、
トンネル中心部の工事に適用できない場合があるが、本
発明では、硬化遅延剤をモルタルに添加混合するので、
その流動性保持機能により、グラウト材の圧送可能な距
離が長くなり、長距離トンネルの中心部の工事にも適用
することができる。Further, the grout material for backfilling in which bentonite is added to the mortar has a large viscosity, so that the workable range of the grouting is limited by the distance that can be pumped from the wellhead, and the long distance In the case of a tunnel,
Although it may not be applicable to the construction of the center of the tunnel, in the present invention, since a curing retarder is added to and mixed with the mortar,
Due to its fluidity retention function, the distance over which grout material can be pumped is increased, and the invention can be applied to the construction of the center of a long-distance tunnel.
【００１５】本発明の製造方法では、前記スラリーは、
前記水膨潤性物質と前記水とを混合・攪拌した後に、所
定時間静置して、前記水膨潤性物質を十分に膨潤・分散
させることができる。In the production method of the present invention, the slurry is
After mixing and stirring the water-swellable substance and the water, the water-swellable substance can be allowed to stand for a predetermined time to sufficiently swell and disperse the water-swellable substance.
【００１６】この構成によれば、水膨潤性物質は、水膨
潤性物質と水とを混合・攪拌した後に、所定時間静置し
て、前記水膨潤性物質を十分に膨潤・分散させるので、
グラウト材の粘性を高め、可塑性を得るのに必要な量だ
け添加すればよく、水膨潤性物質の添加量の低減を図る
ことができる。According to this configuration, the water-swellable substance is allowed to stand for a predetermined time after mixing and stirring the water-swellable substance and water to sufficiently swell and disperse the water-swellable substance.
It is sufficient to add the amount necessary for increasing the viscosity of the grout material and obtaining plasticity, and it is possible to reduce the amount of the water-swellable substance added.
【００１７】また、水膨潤性物質の添加量が増加する
と、裏込めグラウト材の単位水量を多くすることができ
るので、グラウト材の比重が小さくなり、トンネル裏込
めに用いる場合には、覆工部の荷重を軽減することがで
きる。When the amount of the water-swellable substance is increased, the unit water amount of the backfill grout material can be increased, so that the specific gravity of the grout material becomes small. The load on the part can be reduced.
【００１８】前記硬化遅延剤は、前記前記モルタルに前
記スラリーを添加混合してベントナイトモルタルを作製
し、この後に前記ベントナイトモルタルに添加混合する
ことができる。The curing retarder can be added to and mixed with the mortar and the slurry to form a bentonite mortar, and then added and mixed with the bentonite mortar.
【００１９】また、前記硬化遅延剤は、前記スラリーを
前記モルタルに添加混合する際に、同時に添加混合する
ことができる。The curing retarder can be added and mixed at the same time when the slurry is added to and mixed with the mortar.
【００２０】[0020]
【発明の実施の形態】以下、本発明の好適な実施の形態
について、添付図面に基づいて詳細に説明する。図１
は、本発明にかかる裏込めグラウト材の製造方法の一実
施例を示している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG.
Shows an embodiment of a method for producing a backfill grout material according to the present invention.
【００２１】同図に示した裏込めグラウト材の製造方法
では、裏込めグラウト材Gが、水Ｗと、ベントナイト
（水膨潤性物質）Ｂと、硬化遅延剤Ｚと、水硬性セメン
トＣと、細骨材sとを用いて作製される。In the method for manufacturing the backfill grout material shown in FIG. 1, the backfill grout material G is composed of water W, bentonite (water swellable substance) B, hardening retardant Z, hydraulic cement C, It is produced using fine aggregate s.
【００２２】本実施例の場合には、裏込めグラウト材G
は、ベントナイトスラリーＳとモルタルＭは、別に分け
られ、それぞれ別の場所で作製される。すなわち、ベン
トナイトスラリーＳは、構築するトンネル１０の抗口近
傍に作泥装置１２を設置して、ここで作製される。In the case of this embodiment, the backfill grout material G
In the above, the bentonite slurry S and the mortar M are separately separated, and are prepared in different places. That is, the bentonite slurry S is produced here by installing the mud making device 12 near the opening of the tunnel 10 to be constructed.
【００２３】作泥装置１２は、水Ｗを収容するタンク１
２ａと、顆粒状のベントナイトＢを収容するサイロ１２
ｂと、ミキサ１２ｃと、スラリータンク１２ｄとを備え
ている。The mud making device 12 includes a tank 1 for storing water W.
2a and a silo 12 containing granular bentonite B
b, a mixer 12c, and a slurry tank 12d.
【００２４】このような作泥装置１２では、所定量の水
ＷとベントナイトＢとを計量して、ミキサ１２ｃにより
これらを混合，攪拌して、所定配合比のベントナイトス
ラリーＳを予め作製し、これをスラリータンク１２ｄ内
に収容しておく。In such a mud making device 12, a predetermined amount of water W and bentonite B are measured, mixed and stirred by a mixer 12c, and a bentonite slurry S having a predetermined mixing ratio is prepared in advance. Is stored in the slurry tank 12d.
【００２５】一方、モルタルＭは、レディーミクスコン
クリート工場で、セメントＣと細骨材ｓと水とを用い
て、バッチャープラント１４で所定配合にて作製され
る。作製されたモルタルＭは、運搬車１６の混合，攪拌
が可能なドラム１８に収容され、トンネル１０の構築現
場まで搬送される。On the other hand, the mortar M is produced at a ready-mix concrete factory using the cement C, the fine aggregate s, and the water in the batcher plant 14 with a predetermined composition. The produced mortar M is housed in a drum 18 capable of being mixed and stirred by a transport vehicle 16 and transported to a construction site of the tunnel 10.
【００２６】トンネル１０の抗口まで運搬車１６により
搬送されたモルタルＭには、スラリータタンク１２ｄ内
に収容されているベントナイトスラリーＳが所定量添加
される。A predetermined amount of the bentonite slurry S contained in the slurry tank 12d is added to the mortar M transported by the transport vehicle 16 to the entrance of the tunnel 10.
【００２７】この場合のベントナイトスラリーＳと硬化
遅延剤Ｚの添加は、ドラム１８内に収容されているモル
タルＭに注入することにより行われ、所定量のベントナ
イトスラリーＳと、所定量の硬化遅延剤Ｚが注入される
と、ドラム１８を高速回転させることにより、モルタル
ＭとベントナイトスラリーＳおよび硬化遅延剤Ｚとを混
合，攪拌させて、裏込めグラウト材Ｇが作製される。In this case, the addition of the bentonite slurry S and the setting retarder Z is performed by injecting the mixture into the mortar M contained in the drum 18, and a predetermined amount of the bentonite slurry S and a predetermined amount of the setting retarder When Z is injected, the drum 18 is rotated at a high speed to mix and stir the mortar M, the bentonite slurry S, and the hardening retarder Z, thereby producing the backfill grout material G.
【００２８】このようにして作製された裏込めグラウト
材Ｇは、その後、同じ運搬車１６によりトンネル１０内
の注入現場まで搬送され、ホッパ２０内に投入される。The back-filled grout material G thus produced is then transported by the same transport vehicle 16 to the injection site in the tunnel 10 and is put into the hopper 20.
【００２９】ホッパ２０に投入された裏込めグラウト材
Ｇは、ポンプ２２に接続された注入管２４を介して、ト
ンネル１０の覆工部の背面側に存在する空洞部２６に注
入充填される。The backfill grout material G put into the hopper 20 is injected and filled into a hollow portion 26 existing on the back side of the lining portion of the tunnel 10 via an injection pipe 24 connected to a pump 22.
【００３０】以下に示した表は、本実施例で作製する裏
込めグラウト材Ｇの配合比率の複数の例と、硬化遅延剤
Ｚを添加しない場合のグラウト材の配合例とを示してい
る。なお、以下の配合比では、硬化遅延剤Ｚには、液状
のソイルセメント用超遅延剤（日本製紙製、ジオリター
１０、商品名）を用いた。The following table shows a plurality of examples of the compounding ratio of the backfill grout material G produced in the present embodiment, and examples of the grout material when the curing retarder Z is not added. In addition, in the following compounding ratio, a liquid super cement retarder (manufactured by Nippon Paper, Geolitter 10, trade name) for soil cement was used as the curing retarder Z.
【００３１】[0031]
【表】 【table】
【００３２】さて、以上のような裏込めグラウト材Ｇの
製造方法によれば、トンネル抗口近傍では、ベントナイ
ト（水膨潤性物質）Ｂと水Ｗとを混合・攪拌してスラリ
ーＳを作製するだけなので、それほど広い敷地面積を必
要としない。According to the method of manufacturing the backfill grout material G as described above, the slurry S is prepared by mixing and stirring the bentonite (water swellable substance) B and water W near the tunnel opening. It does not require a large site area.
【００３３】また、モルタルＭは、セメントＣと骨材ｓ
および水Ｗとをレディーミクスコンクリート工場で混合
して作製し、作製されたモルタルＭを、運搬車１６の混
合，攪拌が可能なドラム１８に収容してトンネル１０の
構築現場まで運搬し、ドラム１８内に収納されているモ
ルタルＭにスラリーＳを添加した後に、混合攪拌してグ
ラウト材Ｇを作製するので、作業員は、スラリーＳの作
製およびその添加要員だけで済み、製造コストの低減を
図れる。The mortar M is composed of cement C and aggregate s.
And water W are mixed in a ready-mix concrete factory to produce the mortar M. The produced mortar M is housed in a drum 18 capable of being mixed and stirred by a transport vehicle 16 and transported to the construction site of the tunnel 10, where the drum 18 After the slurry S is added to the mortar M housed therein, the grout material G is manufactured by mixing and stirring, so that only a worker of manufacturing the slurry S and the addition of the slurry S are required, and the manufacturing cost can be reduced. .
【００３４】さらに、モルタルＭは、レディーミクスコ
ンクリート工場で作製するので、高品質のものを大量に
安定した状態で、必要に応じて供給することができ、裏
込め作業の能率の向上を図ることができる。Further, since the mortar M is manufactured in a ready-mix concrete factory, a large amount of high-quality mortar can be supplied as needed in a stable state, thereby improving the efficiency of backfill work. Can be.
【００３５】また、本実施例の場合には、ベントナイト
（水膨潤性物質）Ｂと水Ｗとを混合・攪拌してスラリー
Ｓを作製し、作製されたスラリーＳをモルタルＭと混練
するので、水硬性セメントＣの水和により発生するカル
シウムイオンが、ベントナイト（水膨潤性物質）Ｂを膨
潤させる際に存在しないので、カルシウムイオンがベン
トナイト（水膨潤性物質）Ｂの膨潤作用に影響を及ぼす
ことがなくなる。In the case of the present embodiment, bentonite (water swellable substance) B and water W are mixed and stirred to produce a slurry S, and the produced slurry S is kneaded with a mortar M. Since calcium ions generated by hydration of the hydraulic cement C are not present when swelling the bentonite (water-swellable substance) B, the calcium ions affect the swelling action of the bentonite (water-swellable substance) B. Disappears.
【００３６】この場合、カルシウムイオンの影響を確実
に排除するには、ベントナイトスラリーＳは、ベントナ
イト（水膨潤性物質）Ｂと水Ｗとを混合・攪拌した後
に、所定時間静置して、ベントナイト（水膨潤性物質）
Ｂを十分に膨潤・分散させることである。In this case, in order to reliably eliminate the influence of calcium ions, the bentonite slurry S is prepared by mixing and stirring a bentonite (water swellable substance) B and water W, and then allowing the bentonite slurry to stand for a predetermined period of time. (Water swellable substance)
B is sufficiently swelled and dispersed.
【００３７】このようにすれば、ベントナイト（水膨潤
性物質）Ｂと水Ｗとを混合・攪拌した後に、十分に膨潤
・分散させるので、グラウト材Ｇの粘性を高め、可塑性
を得るのに必要な量だけ添加すればよく、ベントナイト
（水膨潤性物質）Ｂの添加量の低減を図ることができ
る。In this way, after mixing and stirring the bentonite (water swellable substance) B and water W, they are sufficiently swelled and dispersed, so that it is necessary to increase the viscosity of the grout material G and obtain plasticity. It is sufficient to add only a small amount, and the amount of bentonite (water swellable substance) B added can be reduced.
【００３８】また、特に、ベントナイト（水膨潤性物
質）Ｂの添加量が増加すると、裏込めグラウト材Ｇの単
位水量を多くすることができるので、グラウト材Ｇの比
重が小さくなり、トンネル裏込めに用いる場合には、覆
工部の荷重を軽減することができる。In particular, when the amount of bentonite (water swellable substance) B added increases, the unit water amount of the backfill grout material G can be increased, so that the specific gravity of the grout material G decreases and the In the case where it is used, the load on the lining part can be reduced.
【００３９】さらにまた、ベントナイトＢをモルタルＭ
に添加した裏込め注入用のグラウト材Ｇは、粘性が大き
くなることや、モルタルＭ中のセメントＣの硬化反応が
始まることなどから、注入可能な施工範囲が、坑口から
の圧送可能な距離により制限を受けて、長距離トンネル
の場合に、トンネル中心部の工事に適用できない場合が
ある。Further, the bentonite B was mixed with mortar M
The grout material G for backfilling added to the material is increased in viscosity and the hardening reaction of the cement C in the mortar M is started. Due to restrictions, in the case of a long-distance tunnel, it may not be applicable to construction in the center of the tunnel.
【００４０】ところが、本実施例では、スラリーＳと硬
化遅延剤ＺとをモルタルＭに添加混合するので、上記表
に示した配合例からも明らかなように、グラウト材Gの
フロー値が、かなりの時間、例えば、添加混合直後から
２〜８時間程度、硬化遅延材Ｚを添加しない場合と同程
度に維持されるので、グラウト材Ｇの圧送可能な距離が
長くなり、長距離トンネルの中心部の工事にも適用する
ことができる。However, in this embodiment, since the slurry S and the setting retarder Z are added to and mixed with the mortar M, the flow value of the grout material G is considerably large as is clear from the mixing examples shown in the above table. , For example, from about 2 to 8 hours immediately after the addition and mixing, and is maintained at the same level as when the hardening retarding material Z is not added. It can also be applied to construction work.
【００４１】この場合のフロー値の大きさは、表に示し
た結果からも明らかなように、硬化遅延剤Zの添加量，
スラリーＳ中のベントナイトＢの添加量，モルタルＭ中
のセメント量などによって異なってくる。As apparent from the results shown in the table, the magnitude of the flow value in this case depends on the amount of the curing retarder Z added,
It depends on the amount of bentonite B in the slurry S, the amount of cement in the mortar M, and the like.
【００４２】そのため、硬化遅延剤Ｚの添加量は、必要
とする遅延効果の程度，温度条件，ベントナイトＢの添
加量，モルタルＭ中のセメント量などにより適宜決定す
ればよい。Therefore, the amount of the hardening retardant Z to be added may be appropriately determined depending on the required degree of the retarding effect, the temperature condition, the amount of bentonite B added, the amount of cement in the mortar M, and the like.
【００４３】なお、上記実施例では、硬化遅延剤Ｚは、
スラリーＳをモルタルＭに添加混合する際に、同時に添
加混合する場合を例示したが、本発明の実施は、これに
限定されることはなく、例えば、モルタルＭにスラリー
Ｓを添加混合してベントナイトモルタルを作製し、この
後にベントナイトモルタルに、硬化遅延剤Ｚを添加混合
してもよい。In the above embodiment, the curing retarder Z is
The case where the slurry S is added to and mixed with the mortar M at the same time has been described as an example. However, the present invention is not limited to this. A mortar may be prepared, and thereafter, a curing retarder Z may be added to and mixed with the bentonite mortar.
【００４４】[0044]
【発明の効果】以上、詳細に説明したように、本発明に
かかる裏込めグラウト材の製造方法によれば、抗口近傍
に広い敷地を必要とせず、製造コストの低減と、注入作
業能率の低下を防止できる。As described above in detail, according to the method for manufacturing backfill grout according to the present invention, a large site is not required in the vicinity of the opening, the manufacturing cost is reduced, and the pouring work efficiency is reduced. Drop can be prevented.
【図１】本発明にかかる裏込めグラウト材の製造方法の
一実施例を示す説明図である。FIG. 1 is an explanatory view showing one embodiment of a method for producing a backfill grout material according to the present invention.
１０ トンネル １２ 作泥装置 １４ バッチャープラント １６ 運搬車 １８ ドラム Ｇ 裏込めグラウト材 Ｂ ベントナイト Ｃ 水硬性セメント Ｓ ベントナイトスラリー ｓ 細骨材 Ｗ 水 Ｚ 硬化遅延剤 DESCRIPTION OF SYMBOLS 10 Tunnel 12 Mud making apparatus 14 Batcher plant 16 Truck 18 Drum G Backfill grout material B Bentonite C Hydraulic cement S Bentonite slurry s Fine aggregate W Water Z Hardening retardant
───────────────────────────────────────────────────── フロントページの続き (72)発明者 久保 博 東京都清瀬市下清戸４−640 株式会社大 林組技術研究所内 Ｆターム(参考） 2D055 GA06 JA02 KA11 LA14 4G012 PA04 PA06 PC05 4G056 AA07 CB19 CB32 CD64 DA01 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroshi Kubo 4-640 Shimoseito, Kiyose-shi, Tokyo F-term in Obayashi Corporation Technical Research Institute, Inc. (reference) 2D055 GA06 JA02 KA11 LA14 4G012 PA04 PA06 PC05 4G056 AA07 CB19 CB32 CD64 DA01
Claims (4)
などの水膨潤性物質と、骨材と、硬化遅延剤とを含む裏
込めグラウト材の製造方法において、 前記水膨潤性物質と前記水とを、トンネル抗口近傍で混
合・攪拌してスラリーを作製し、 前記セメントと骨材および水とをレディーミクスコンク
リート工場で混合してモルタルを作製し、 作製された前記モルタルを、運搬車の混合，攪拌が可能
なドラムに収容してトンネル構築現場まで運搬し、 前記ドラム内に収納されている前記モルタルに前記スラ
リーと硬化遅延剤とを添加した後に、混合攪拌してグラ
ウト材を作製することを特徴とする裏込めグラウト材の
製造方法。1. A method for producing a backfill grout material comprising water, hydraulic cement, a water-swellable substance such as bentonite, an aggregate, and a setting retarder, wherein the water-swellable substance, the water and Is mixed and stirred in the vicinity of the tunnel entrance to produce a slurry, and the cement, aggregate and water are mixed in a ready-mix concrete factory to produce a mortar, and the produced mortar is mixed with a transport vehicle. , Housed in a drum capable of stirring, transported to a tunnel construction site, and after adding the slurry and the setting retarder to the mortar housed in the drum, mix and stir to produce a grout material. A method for producing a backfill grout material, characterized in that:
記水とを混合・攪拌した後に、所定時間静置して、前記
水膨潤性物質を十分に膨潤・分散させることを特徴とす
る請求項１記載の裏込めグラウト材の製造方法。2. The slurry is characterized in that the water-swellable substance and the water are mixed and stirred, and then left for a predetermined time to sufficiently swell and disperse the water-swellable substance. Item 7. The method for producing a backfill grout material according to Item 1.
前記スラリーを添加混合してベントナイトモルタルを作
製し、この後に前記ベントナイトモルタルに添加混合す
ることを特徴とする請求項１または２記載の裏込めグラ
ウト材の製造方法。3. The backing agent according to claim 1, wherein the curing retarder is added and mixed with the slurry to the mortar to form a bentonite mortar, and thereafter added and mixed to the bentonite mortar. A method for producing grouted material.
前記モルタルに添加混合する際に、同時に添加混合する
ことを特徴とする請求項１または２記載の裏込めグラウ
ト材の製造方法。4. The method for producing a backfill grout material according to claim 1, wherein the curing retarder is added and mixed at the same time when the slurry is added to and mixed with the mortar.
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|---|---|---|---|
| JP2001109641A JP4506024B2 (en) | 2001-04-09 | 2001-04-09 | Manufacturing method of backfill grout material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001109641A JP4506024B2 (en) | 2001-04-09 | 2001-04-09 | Manufacturing method of backfill grout material |
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| JP4506024B2 JP4506024B2 (en) | 2010-07-21 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009023274A (en) * | 2007-07-23 | 2009-02-05 | Tokyo Cement Kogyo Kk | Method of manufacturing bentonite slurry and method of manufacturing water-retentive cement cured product |
| CN102873761A (en) * | 2012-10-26 | 2013-01-16 | 上海世邦机器有限公司 | Mobile concrete aggregate production process optimization system |
| CN103089275A (en) * | 2013-01-16 | 2013-05-08 | 山东大学 | Control method of surrounding rocks in water-rich very-broken surrounding rock tunnel collapse sections |
| CN104478369A (en) * | 2014-12-28 | 2015-04-01 | 上海隧道工程股份有限公司 | Synchronous grouting method for rectangular shield construction and grouting slurries |
| CN107020700A (en) * | 2017-04-19 | 2017-08-08 | 河海大学 | Slurry temperature control device and control method during a kind of cement mixing |
| CN107816029A (en) * | 2017-09-12 | 2018-03-20 | 中交天津港湾工程研究院有限公司 | A kind of embedding material and its method for embedding for being applied to embedded soil pressure cell |
| CN111499283A (en) * | 2020-04-22 | 2020-08-07 | 嵊州市路通水泥制品有限公司 | Production process of high-molecular polymer mortar |
| CN111946297A (en) * | 2020-08-19 | 2020-11-17 | 新地能源工程技术有限公司 | Filling and curing slurry and horizontal directional drilling grouting collapse prevention process |
| CN114352316A (en) * | 2021-11-30 | 2022-04-15 | 中交隧道工程局有限公司 | Slurry mixing system for synchronous double-liquid grouting of shield tunnel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103643965A (en) * | 2013-12-16 | 2014-03-19 | 上海市基础工程集团有限公司 | Repair and reinforcement construction methods for segments in formed tunnel |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009023274A (en) * | 2007-07-23 | 2009-02-05 | Tokyo Cement Kogyo Kk | Method of manufacturing bentonite slurry and method of manufacturing water-retentive cement cured product |
| CN102873761A (en) * | 2012-10-26 | 2013-01-16 | 上海世邦机器有限公司 | Mobile concrete aggregate production process optimization system |
| CN103089275A (en) * | 2013-01-16 | 2013-05-08 | 山东大学 | Control method of surrounding rocks in water-rich very-broken surrounding rock tunnel collapse sections |
| CN103089275B (en) * | 2013-01-16 | 2013-12-04 | 山东大学 | Control method of surrounding rocks in water-rich very-broken surrounding rock tunnel collapse sections |
| CN104478369A (en) * | 2014-12-28 | 2015-04-01 | 上海隧道工程股份有限公司 | Synchronous grouting method for rectangular shield construction and grouting slurries |
| CN107020700A (en) * | 2017-04-19 | 2017-08-08 | 河海大学 | Slurry temperature control device and control method during a kind of cement mixing |
| CN107816029A (en) * | 2017-09-12 | 2018-03-20 | 中交天津港湾工程研究院有限公司 | A kind of embedding material and its method for embedding for being applied to embedded soil pressure cell |
| CN111499283A (en) * | 2020-04-22 | 2020-08-07 | 嵊州市路通水泥制品有限公司 | Production process of high-molecular polymer mortar |
| CN111946297A (en) * | 2020-08-19 | 2020-11-17 | 新地能源工程技术有限公司 | Filling and curing slurry and horizontal directional drilling grouting collapse prevention process |
| CN114352316A (en) * | 2021-11-30 | 2022-04-15 | 中交隧道工程局有限公司 | Slurry mixing system for synchronous double-liquid grouting of shield tunnel |
| CN114352316B (en) * | 2021-11-30 | 2024-03-19 | 中交隧道工程局有限公司 | Slurry stirring system for synchronous double-liquid grouting of shield tunnel |
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