JP2001049994A - Tunnel back-filling construction method of using surplus soil - Google Patents
Tunnel back-filling construction method of using surplus soilInfo
- Publication number
- JP2001049994A JP2001049994A JP11222366A JP22236699A JP2001049994A JP 2001049994 A JP2001049994 A JP 2001049994A JP 11222366 A JP11222366 A JP 11222366A JP 22236699 A JP22236699 A JP 22236699A JP 2001049994 A JP2001049994 A JP 2001049994A
- Authority
- JP
- Japan
- Prior art keywords
- soil
- backing
- tunnel
- surplus soil
- water
- 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.)
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Links
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- Lining And Supports For Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】開示技術は、シールドトンネル施
工を行うに際し、トンネルの掘削残土を泥水として用
い、一次巻立セグメントとトンネル地山削孔との間隙部
分に裏込材として用いる工法の技術分野に属する。BACKGROUND OF THE INVENTION The disclosed technology is a technique of a method of using a tunnel excavated soil as mud when constructing a shield tunnel and using it as a backing material in a gap between a primary winding segment and a tunnel borehole. Belongs to the field.
【０００２】[0002]
【従来の技術】周知の如く、国土が狭隘で山間部が多
く、しかも、複雑に入り組んだ長い海岸線に接近してい
るような特殊な地勢条件の我国にあっては、農耕牧畜は
勿論のこと、一般住宅は言うに及ばず、産業施設に有効
に利用する平野部は限られており、したがって、該種施
設は全国的に散在し、これらの産業施設の間には、鉄道
や高速道路網がネットワーク裡に敷設されており、その
ため、これらの交通網の間にはトンネルが数多く構築さ
れ、したがって、我国においては該種トンネル施工技術
においては確固たる地位を占めている。2. Description of the Related Art As is well known, in Japan, where the land is narrow, there are many mountainous areas, and there are special terrain conditions such as approaching a complicated long coastline, not only agricultural and livestock farming, In addition to ordinary houses, the plains that are effectively used for industrial facilities are limited. Therefore, such facilities are scattered nationwide, and railway and highway networks are located between these industrial facilities. Are laid in a network, and therefore, many tunnels are constructed between these transportation networks, and therefore have a strong position in Japan in this kind of tunnel construction technology.
【０００３】しかしながら、該種トンネル構築にあって
は、近時シールドトンネル施工が広く採用されるように
なり、スラリー状の掘削泥水が使用後、坑外に排出さ
れ、当然のことながら、廃棄場所や輸送や設備、無公害
化処理等の条件が不可欠になってきており、そこで、例
えば、特開昭５３−１９３８号公報発明及び特開昭３−
０７３７１８号公報発明の如く、出願人の先願発明に示
す様に、トンネル掘削に用いた泥水を当該トンネル本体
の一次巻立シールド工セグメントとの間隙に再充填する
ような裏込工法が開発されて、広く利用されるようにな
ってきている。However, in the construction of such a tunnel, recently the construction of a shield tunnel has been widely adopted, and after the slurry-like drilling mud is used, it is discharged out of the mine, and, naturally, the disposal site is disposed of. Conditions such as transportation, facilities, and pollution-free treatment have become indispensable. Therefore, for example, the invention disclosed in JP-A-53-1938 and the invention disclosed in
As disclosed in the prior invention of the applicant, a backing method has been developed in which the muddy water used for tunnel excavation is refilled into the gap between the tunnel body and the primary winding shield work segment, as disclosed in the invention of Japanese Patent No. 0737718. Therefore, it is becoming widely used.
【０００４】しかしながら、各種在来態様に基ずくシー
ルドトンネル施工によるトンネル裏込工法にあっては、
裏込に用いる残土が粘土，ベントナイト等のシルト部分
を細骨材としてセメント等の固結材により、裏込注入し
ているのがその実情であり、これらのシルト分は天然有
資源であり、乱採取による環境破壊にもつながり、且
つ、有償のものであった。[0004] However, in a tunnel backing method based on the construction of a shield tunnel based on various conventional modes,
The fact is that the remaining soil used for backfill is backfilled with silt such as clay and bentonite using cement or other consolidation material, and these silts are natural resources. It also led to environmental destruction due to random sampling and was a paid one.
【０００５】かかる技術は、近年におけるトンネル掘削
技術である泥水シールド工、及び、土圧のシールド工に
見られるように人工的な泥水を注入しながら、トンネル
を掘削する為、非常に含水の多い汚泥残土として、排出
されることから産業廃棄物として処分され、その費用も
大きく、処分場も不足し、不法投棄が横行し、大きな社
会問題となっており、これら泥土のリサイクルに供する
ものである。[0005] Such a technique is very wet because it excavates a tunnel while injecting artificial muddy water, as seen in a muddy water shield construction method and an earth pressure shield construction technique which are recent tunnel excavation techniques. Waste sludge is disposed of as industrial waste because it is discharged, the cost is large, the disposal site is short, illegal dumping is widespread, and it has become a major social problem, and these sludges are recycled. .
【０００６】しかしながら、裏込に利用するための大き
な基本的な要件は以下の通りである。[0006] However, the major basic requirements for use in backing are as follows.
【０００７】[0007]
【発明が解決しようとする課題】即ち、まず、長距離圧
送が可能であることであり、近年におけるシールド施工
トンネルの技術によるトンネル構築は１工区間の掘削距
離が長くなり、裏込の圧送距離も長距離圧送が必要とな
り、裏込施工上の技術に伴って、その粘性がネックとな
る難点があった。That is, firstly, long-distance pumping is possible. In recent years, tunnel construction by shield construction tunnel technology requires a long excavation distance in one construction section, and a back-filled pumping distance. Also required long-distance pumping, and with the technology of backing work, there was a problem that the viscosity became a bottleneck.
【０００８】又、裏込材のブリージングを防止すること
について該裏込材のブリージングが大きな場合、圧送通
路内上部が水となり、底部には粒子状分が沈殿蓄積され
る為に、圧送部分が閉塞するというネックがある。In order to prevent the backing material from being breathed, if the backing material is greatly breathed, the upper part in the pressure feed passage becomes water, and the particulate matter precipitates and accumulates at the bottom. There is a neck to block.
【０００９】又、裏込材としての、設計通りの机上デー
タの値が出来ないばかりでなく、トンネル内に注入され
た後においても、沈降が生ずる為に、トンネル上部に空
胴化現象が生じるという施工管理上の難点がある。In addition, not only the value of the desk data as designed as the backing material cannot be obtained, but also the sedimentation occurs even after being injected into the tunnel, so that a cavity phenomenon occurs at the top of the tunnel. There is a difficulty in construction management.
【００１０】又、裏込圧縮強度管理において、一般的に
は２８日の一軸圧縮強度は１０ｋｇ／ｃｍ２前後と言わ
れ、又、地山程度ともされているが、掘削トンネルの地
上面からの深度、及び、地上の交通量や建造物の状況、
又は掘削されるトンネルが直線状や曲線状の場合があ
り、かかる様々な要件で要求されることが多く、その裏
込配合も要求にあわせた配合の状態や、固結材の選定を
行う必要がある不利点があった。In the back compression strength management, the uniaxial compression strength on 28th is generally said to be about 10 kg / cm 2, which is about the ground level, but the depth from the ground surface of the excavation tunnel. , And ground traffic and building conditions,
Or, the tunnel to be excavated may be straight or curved, which is often required by such various requirements, and it is necessary to select the backing mix according to the conditions of the mix and selection of the consolidated material. There were disadvantages.
【００１１】しかしながら、これらの裏込の基本的要件
をクリアするためには、裏込に使用される残土泥水が良
質な裏込材としてリサイクルされなければならないもの
ではある。However, in order to satisfy these basic requirements for backfilling, the residual soil mud used for backing must be recycled as a good backing material.
【００１２】而して、請求項１の数値限定の範囲によれ
ば、その土質によって比重・粘性が異なり、使用範囲が
限定されるものである。[0012] According to the numerical limitation range of the first aspect, the specific gravity and the viscosity vary depending on the soil properties, and the use range is limited.
【００１３】例えば、シルト分の少ない土質の掘削に於
いて作泥材としてベントナイト等を多量に使用された場
合に礫分を除いた泥水の比重が１．０５の様な場合があ
り、排出される時に主としてトンネル掘削時に作泥され
たベントナイト、及び、増粘材などが混合された状態
で、残土として排出されるが、その場合の多くは、粘性
が大きく、水比が多いにもかかわらず、適量の固結材を
混合しても、ブリージングが生じないものである。For example, when a large amount of bentonite or the like is used as mud material in excavation of soil having a small amount of silt, the specific gravity of mud water excluding gravels may be 1.05. When excavation, bentonite mainly produced during tunnel excavation and thickeners are mixed and discharged as surplus soil, but in many cases, despite the large viscosity and large water ratio, Even if an appropriate amount of the consolidating material is mixed, no breathing occurs.
【００１４】又、一方、比重の高い１．３程度で排出さ
れる場合には、砂分が多い場合と、シルト分が多く、含
水比が少ない場合との２通りの態様が考えられ、いずれ
にしても裏込の強度が上昇する傾向にあり、固結材を少
なくすることが可能でありはするものの、シルト分が多
く、含水比が少ない場合は粘性が高くなるために、前記
請求項２，３の通りの調整が必要となるネックがあっ
た。On the other hand, when the water is discharged at a high specific gravity of about 1.3, two modes can be considered: a case where the sand content is large, and a case where the silt content is large and the water content ratio is low. Even so, the strength of the backing tends to increase, and although it is possible to reduce the solidification material, the silt content is large, and the viscosity is high when the water content ratio is small, so the claim There were necks that required a few adjustments.
【００１５】又、前記請求項２においてマーシュファン
ネル粘度の限定範囲は裏込の強度発現の為の固結材の混
入限界と残土泥水の関係上から必要な範囲ではある。Further, in the above-mentioned claim 2, the limited range of the marsh funnel viscosity is a necessary range in view of the mixing limit of the solidifying material for developing the backing strength and the residual soil mud.
【００１６】例えば、ファンネル粘度が高ければ、水分
が少なく、低ければ、水分が多いことから水分が低い状
態で、固結材を入れても、ブリージングが発生し易く、
高い状態で固結材を混入することで圧送が出来なくなる
不利点がある。For example, if the funnel viscosity is high, the moisture content is low, and if the funnel viscosity is low, since the moisture content is high, the breathing is likely to occur even when the consolidation material is added in a state where the moisture content is low.
There is a disadvantage in that the pressure feed cannot be performed by mixing the consolidated material in a high state.
【００１７】これらのことから、無駄のない最適な固結
材の量と最適な裏込としての技術適用範囲を確保する為
に請求項２のようにマーシュファンネル粘度を維持する
ことが望ましい要望があった。From these facts, it is desirable to maintain the marsh funnel viscosity as in claim 2 in order to secure the optimum amount of the compacting material without waste and the technical application range as the optimum backing. there were.
【００１８】而して、前記請求項４は、残土泥水と固結
材、及び、助剤等が混合されて裏込材として、出来上が
ったとしても、フロー値が請求項４の範囲内である必要
がある。According to the fourth aspect of the present invention, the flow value is within the range of the fourth aspect, even if the residual soil mud, the binding material, the auxiliary agent, and the like are mixed to form a backing material. There is a need.
【００１９】該フロー値が高くなれば、泥水と固結材混
合により出来あがった裏込材の圧送が不可能であり、裏
込材として、不適合である不具合があった。If the flow value is high, it is impossible to feed the backing material formed by mixing the muddy water and the solidifying material, and there is a problem that the backing material is not suitable.
【００２０】これらの粘性調整は、加水による調整も可
能ではあるが、裏込材の強度を下げないためにはコンク
リート等の流動化剤、減水剤等を使用することが望まし
いことではある。The viscosity can be adjusted by adding water, but it is desirable to use a fluidizing agent such as concrete, a water reducing agent, etc. in order not to lower the strength of the backing material.
【００２１】又、これらの残土を多く使用するために
は、裏込に使用する裏込圧送ポンプを強力にすることに
より、フロー値が大きい状態でモルタルを作成し、圧送
することにより、固結剤を減少させるとともに、残土利
用率を上げることが出来るものではあるが、残土利用に
よる裏込モルタルの性状から、特許請求の範囲の数値限
定が望ましいものではある。Further, in order to use a large amount of these residual soils, the mortar is prepared with a large flow value by consolidating the mortar with a large flow value by consolidating the mortar by using a powerful backing pump for backing. While it is possible to reduce the amount of the agent and increase the utilization rate of the residual soil, it is desirable to limit the numerical values in the claims from the properties of the backing mortar due to the utilization of the residual soil.
【００２２】尚、モルタルに対するマーシュファンネル
粘度計は図１に示すように、漏斗型のじようご（例えば
容量５００ｃｃ）１、及び、受け容器２、及び、両者に
亘るスタンド３より成るものであるが、当該モルタルの
粘性の高さにより、流動状態がスムーズな流動状態でな
いことがあるためにフロー値は図２に示す様な、フロー
コーンを用いてモルタルが流出する時間を測定して流す
様にしており、含水比における水と土の関係について
は、次の図３の通りであり、縦軸の泥土従量に対し土質
比重が２．５及び２．７を想定したとき、横軸の含水比
が分り、又、該横軸の含水比より泥土重量が想定されて
いるものである。As shown in FIG. 1, the Marsh funnel viscometer for mortar comprises a funnel-shaped funnel (for example, a capacity of 500 cc) 1, a receiving container 2, and a stand 3 extending between the two. However, due to the high viscosity of the mortar, the flow state may not be a smooth flow state. Therefore, the flow value is determined by measuring the time when the mortar flows out using a flow cone as shown in FIG. The relationship between water and soil in the water content ratio is as shown in FIG. 3. When the soil specific gravity is assumed to be 2.5 and 2.7 with respect to the mud soil amount on the vertical axis, the water content on the horizontal axis is assumed. The ratio is known, and the mud weight is assumed from the water content on the horizontal axis.
【００２３】当該図３に示すものは、含水比における水
と土の関係を示す概略的に現した藻であるが、横軸に
は、含水比Ｗ（％）を、又、縦軸には泥土の重量ｋｇ／
ｍ3 をとったものであり、実線で示す曲線は土粒子の比
重２．５の場合を想定し、又、破線は土粒子比重２．７
の場合を示すものである。FIG. 3 shows an algae schematically showing the relationship between water and soil in the water content ratio. The horizontal axis shows the water content W (%), and the vertical axis shows the water content. Mud weight kg /
m 3 , and the curve shown by the solid line assumes the case of a specific gravity of soil particles of 2.5, and the broken line indicates the specific gravity of soil particles of 2.7.
FIG.
【００２４】当該図３において、土粒子の比重２．５
（実線）で含水比が３００％の場合、土分が２９５ｋｇ
／ｍ3 で水が、８８２ｋｇ／ｍ3 で合計１１７７（比重
１．１７７）と読むものであるものとする。In FIG. 3, the specific gravity of the soil particles is 2.5.
When the water content is 300% (solid line), the soil content is 295 kg
/ M 3 , and 882 kg / m 3 for a total of 1177 (specific gravity 1.177).
【００２５】又、図４に示すグラフは現場掘削泥水のフ
ァンネル粘性を計量し裏込用に供する泥水の粘性を調整
するに当り、縦軸のファンネル粘性を読みとり、横軸の
加水量（ｌ）を調整する泥水粘性調整表である。図５は
土粒子の比重が２．５及び２．７のとき含水比による土
の比重すなわち単位体積重量を表したものである。In addition, the graph shown in FIG. 4 is used to read the funnel viscosity on the vertical axis and the amount of water added (l) on the horizontal axis in measuring the viscosity of the funnel in the drilling mud at the site and adjusting the viscosity of the mud used for backfilling. It is a muddy viscosity adjustment table which adjusts. FIG. 5 shows the specific gravity of the soil, that is, the unit volume weight, based on the water content when the specific gravity of the soil particles is 2.5 and 2.7.
【００２６】[0026]
【発明の目的】この出願の発明の目的は、上述従来技術
に基づくシールドトンネル工の残土を利用して裏込施工
するに際し、開発されている在来態様同様に、掘削孔と
一次巻立セグメントとの間に残土を利用した泥水を用
い、裏込とする工法にあって裏込の細骨材に利用される
残土の比重を１．０５から１．３までの範囲であるよう
にし、又、裏込の細骨材に利用される残土の粘性がマー
シュファンネル粘度計で１８秒〜２６秒であるように
し、利用する残土がスムーズに裏込に利用されやすく、
而もこれらの泥水に裏込として適合される範囲の固結材
及び助剤等を混合し出来あがった裏込材のフロー値が８
秒から１５秒とすることにより、トンネルの区間長が長
くてもその輸送がスムーズにおこなわれるようにして、
建設産業におけるトンネル施工技術利用分野に益する優
れた残土利用トンネル裏込工法を提供せんとするもので
ある。It is an object of the invention of the present application to carry out backfilling by using the surplus soil of the shield tunnel construction based on the above-mentioned prior art, as well as the conventional mode that has been developed, as well as the excavation hole and the primary winding segment. In the method of backfilling, the specific gravity of the remaining soil used for the backing fine aggregate is in the range of 1.05 to 1.3, using mud water using the remaining soil between The viscosity of the residual soil used for the backing fine aggregate is set to 18 seconds to 26 seconds with a Marsh funnel viscometer, and the remaining soil to be used is easily used for the backing smoothly.
Also, the flow value of the backing material, which is obtained by mixing a binding material and an auxiliary agent in such a range as to fit into the muddy water, is 8
By setting from 15 seconds to 15 seconds, even if the section length of the tunnel is long, the transportation will be performed smoothly,
The purpose of the present invention is to provide a tunnel backfill method that uses an excellent surplus soil that is beneficial to the application of tunnel construction technology in the construction industry.
【００２７】[0027]
【課題を解決するための手段】上述目的に沿い先述特許
請求の範囲を要旨とするこの出願の発明の構成は、前述
課題を解決するために、シールドトンネル工に伴い、掘
削孔と一次巻立セグメントとの間隔に残土を利用した泥
水を用いる裏込工法において、該裏込の細骨材として利
用される残土の比重が１．０５〜１．３までの範囲であ
るような泥水にすることを基幹とし、更に上記裏込の細
骨材に利用される残土の粘性がマーシュファンネル粘度
計で１８〜２６秒であるようにし、又、上記裏込の細骨
材に利用される残土と該残土固結用の固結材、及び、助
剤の混練り後のフロー値が８〜１５秒となるようにも
し、更に、上記残土泥水に裏込として適合するような範
囲で固結材、及び、助剤を混合した裏込材によるように
もした技術的手段を講じたものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the construction of the invention of the present application for solving the above-mentioned problems is to reduce the number of excavation holes and primary windings with shield tunneling work. In the backfill method using the mud using the residual soil in the interval between the segments, the muddy water is used such that the specific gravity of the residual soil used as the fine aggregate of the backing is in a range of 1.05 to 1.3. Based on, the viscosity of the remaining soil used for the backing fine aggregate is adjusted to be 18 to 26 seconds with a Marsh funnel viscometer, and the remaining soil used for the backing fine aggregate and The solidifying material for solidification of the residual soil, and the flow value after kneading of the auxiliary agent is set to be 8 to 15 seconds, and further, the solidifying material in a range that is suitable as backing to the residual soil mud, And technical means to make use of backing materials mixed with auxiliaries. Flip those were.
【００２８】[0028]
【作用】上述構成において、掘削残土を泥水化して、シ
ールドトンネル工の裏込を行うに際し、利用される残土
の比重が１．０５乃至１．３とし、裏込がしやすいよう
にし、又、当該残土の粘性がマーシュファンネル粘度計
で１８乃至２６秒であることにし、又、固結材と助剤の
混練りの後のフロー値が８乃至１５秒とすることによ
り、トンネルの１区間の長さが長くなっても、スムーズ
に圧送が可能であるようにしたものである。In the above construction, when excavated soil is muddy and backing of the shield tunnel is performed, the specific gravity of the used soil is set to 1.05 to 1.3, so that the backing is easily performed. By setting the viscosity of the surplus soil to 18 to 26 seconds by a Marsh funnel viscometer and setting the flow value after kneading of the consolidating material and the auxiliary agent to 8 to 15 seconds, one section of the tunnel is Even if the length becomes long, the pressure can be smoothly fed.
【００２９】[0029]
【発明が実施しようとする形態】次に、この出願の発明
の実施しようとする形態を実施例の態様として図６の図
面を参照して説明すれば以下の通りである。Next, an embodiment of the present invention will be described with reference to FIG. 6 as an embodiment.
【００３０】図６に示す実施例の態様において、トンネ
ルの切羽部１５に於いて、所定の周知の地山掘削を行
い、順次掘削坑内面に、セグメント１４を周知のように
一次巻立していく。In the embodiment shown in FIG. 6, a predetermined well-known ground excavation is carried out at the face 15 of the tunnel, and the segment 14 is firstly erected on the inner surface of the excavation pit in a known manner. Go.
【００３１】而して、セグメント１４と地山１７との間
に空間１６が生じ、放置することにより地盤沈下等の問
題が生じる。Thus, a space 16 is created between the segment 14 and the ground 17, and if left untreated, problems such as land subsidence occur.
【００３２】而して、セグメント１４の一次巻立が終了
すると、それと併行して掘削残土１を適時、分離器２に
より、礫と砂分以下等の残土等を分離し、礫分３は適宜
に輸送配置し、一方シルト、砂及び水分の泥水４は比重
又は粘性調整槽５に送られ、ポンプ６により水又は流動
化剤、及び、減水剤１９により適度の粘性調整後適宜攪
拌装置７により固結剤及び助剤８の混合を行い、サンド
ポンプ９により、Ｙ管混合装置１３に圧送されセグメン
ト１４の裏面空間１６に圧入される。When the primary winding of the segment 14 is completed, the excavated soil 1 is separated from the excavated soil 1 in a timely manner by the separator 2, and the gravel 3 is appropriately separated from the excavated soil. The muddy water 4 of silt, sand and moisture is sent to a specific gravity or viscosity adjusting tank 5, water or a fluidizing agent by a pump 6, and a suitable viscosity adjusting by a water reducing agent 19, and then a suitable stirring device 7. The binder and the auxiliary agent 8 are mixed, and the mixture is pressure-fed to the Y-tube mixing device 13 by the sand pump 9 and pressed into the back space 16 of the segment 14.
【００３３】他方、ゲルタイムの長い固結材と泥水混合
モルタル１０に対し、例えば、ケイ酸ソーダー系等の急
硬化剤１１をポンプ１２により、同じく、Ｙ管混合装置
１３に設定供給量で、圧送し、該部位で上記固結材及び
助剤混合泥水１０と共に、Ｙ型混合装置ノズル１３によ
り、セグメント１４の裏面空間１６に圧注する。On the other hand, a rapid hardening agent 11, such as sodium silicate, for example, is pumped by a pump 12 to a Y-tube mixing device 13 at a set supply amount to a mortar 10 mixed with a muddy water having a long gel time. Then, the Y-type mixing device nozzle 13 is used to press-pour the solidified material and the auxiliary agent mixed muddy water 10 into the back space 16 of the segment 14 at the site.
【００３４】上述実施例において、泥水粘性調整槽５で
調整された泥水１８はマーシュファンネル粘土計で１８
秒〜２６秒であり、固結材及び助剤８と調整泥水１８を
攪拌装置７で混合された泥水裏込モルタル１０のフロー
値が８秒〜１５秒とされている。In the above embodiment, the muddy water 18 adjusted in the muddy viscosity adjusting tank 5 is measured by a Marsh funnel clay meter.
2 to 26 seconds, and the flow value of the mud back mortar 10 in which the binding agent and the auxiliary 8 and the adjusted mud 18 are mixed by the stirrer 7 is set to 8 to 15 seconds.
【００３５】[0035]
【発明の効果】以上、この出願の発明によれば、シール
ドトンネル工による裏込工法を行うに際し、上記裏込の
細骨材に利用される残土の粘性がマーシュファンネル粘
度計で１８秒〜２６秒であるようにされた裏込の細骨材
として利用される残土と該残土の固結材、及び細骨材の
混練り後のフロー値が８秒〜１５秒であるようにするこ
とにより、裏込の強度発現の為の固結材の混入限界と残
土泥水が設計上必要な範囲であり、マーシュファンネル
粘度計が当該範囲にあることにより、ブリージングの発
生は抑制され、長距離圧送状態で固結材を混入して発送
することが出来るという優れた効果が奏される。As described above, according to the invention of this application, when performing the backing method by shield tunneling, the viscosity of the residual soil used for the fine aggregate of the backing is 18 seconds to 26 seconds by a Marsh funnel viscometer. By setting the flow value after kneading of the surplus soil and the consolidation material of the surplus soil and the fine aggregate to be used as the backing fine aggregate that is set to be seconds to 8 seconds to 15 seconds. The mixing limit of solidified material and the residual soil mud for developing the strength of backing are within the necessary range for design, and since the Marsh funnel viscometer is within the range, the occurrence of breathing is suppressed and the long distance pumping state Thus, an excellent effect is achieved in that a consolidation material can be mixed and sent.
【００３６】これらのことから無駄の無い最適な固結材
の量と最適な裏込の適用範囲を有するために粘性を維持
することが出来るという効果が奏される。From these facts, there is an effect that the viscosity can be maintained because of having the optimum amount of the compacting material without waste and the optimum application range of the backing.
【００３７】又、フロー値が８秒〜１５秒の範囲でなけ
れば泥水の圧送が不可能であり、裏込材として不適合で
あるデメリットが生じる。If the flow value is not in the range of 8 to 15 seconds, the pumping of the muddy water is impossible, and there is a disadvantage that it is not suitable as a backing material.
【００３８】粘性調整については水を加えることにより
調整も可能であるが、裏込材の強度を下げない為にコン
クリートの流動化剤、減水剤等を使用することが望まし
いという効果が奏される。The viscosity can be adjusted by adding water, but it is desirable to use a fluidizer, a water reducing agent, etc. for concrete so as not to lower the strength of the backing material. .
【００３９】これらの残土を多く使用する為には、裏込
に使用される裏込圧送ポンプを強力にすることにより、
フロー値が大きい状態でモルタルを作成し、圧送するこ
とにより固結剤を減少させることも可能であり、残土利
用率を挙げることが出来るという優れた効果が奏され
る。In order to use a large amount of these residual soils, the backing pressure pump used for backing is strengthened,
It is also possible to reduce the amount of the binder by preparing and feeding the mortar in a state where the flow value is large, and it is possible to obtain an excellent effect of increasing the utilization rate of the residual soil.
【図１】マーシュファンネル粘度計の外観概略斜視図で
ある。FIG. 1 is a schematic perspective view of the appearance of a Marsh funnel viscometer.
【図２】フローコーンの断面図である。FIG. 2 is a sectional view of a flow cone.
【図３】含水比に対する土と水の関係グラフ図である。FIG. 3 is a graph showing the relationship between water content and soil and water.
【図４】泥水と粘性調整表の関係グラフ図である。FIG. 4 is a graph showing the relationship between muddy water and a viscosity adjustment table.
【図５】含水比と単位体積重量の関係グラフ図である。FIG. 5 is a graph showing a relationship between a water content ratio and a unit volume weight.
【図６】この出願の発明の施工態様の１実施例の説明図
である。FIG. 6 is an explanatory view of one embodiment of a construction mode of the invention of this application.
１ 掘削残土泥水 ２ 残土分離器 ３ 残土礫分 ４ 砂以下分の泥水 ５ 比重及び粘性調整槽 ６ 圧送ポンプ ７ 攪拌装置 ８ 固結材および助剤 ９ サンドポンプ １０ 固結材及び助剤混合泥水 １１ 急硬化剤 １２ 圧送ポンプ １３ Ｙ管混合装置 １４ セグメント １５ シールドトンネル切羽部 １６ 空間部 １７ 地山 １８ 粘性調整後の泥水 １９ 水又は流動化剤又は減水剤（粘性調整材） REFERENCE SIGNS LIST 1 excavated residual soil mud 2 residual soil separator 3 residual soil gravel 4 mud for sand or less 5 specific gravity and viscosity adjustment tank 6 pressure pump 7 stirrer 8 solidifying material and auxiliary agent 9 sand pump 10 solidifying agent and auxiliary mixed muddy water 11 Rapid hardener 12 Pressure pump 13 Y-pipe mixer 14 Segment 15 Shield tunnel face 16 Space 17 Ground 18 Muddy water after viscosity adjustment 19 Water or fluidizing agent or water reducing agent (viscosity adjusting material)
Claims (4)
次巻立セグメントとの間隔に残土を利用した泥水を用い
る裏込工法において、該裏込の細骨材に利用される残土
の比重が１．０５〜１．３までの範囲であるような泥水
にすることを特徴とする残土利用トンネル裏込工法。In a backfilling method using muddy water that uses surplus soil at an interval between an excavation hole and a primary winding segment along with the construction of a shield tunnel, the specific gravity of the surplus soil used for the fine aggregate of the backing is 1%. A tunnel backfill method using residual soil, characterized in that the slurry is muddy in a range of 0.05 to 1.3.
がマーシュファンネル粘度計で１８秒〜２６秒であるよ
うにすることを特徴とする請求項１記載の残土利用トン
ネル裏込工法。2. A backfill for a tunnel using a remaining soil according to claim 1, wherein the viscosity of the remaining soil used for the fine aggregate of the backing is 18 seconds to 26 seconds by a Marsh funnel viscometer. Construction method.
土の固結材、及び助剤の混練り後のフロー値が８秒〜１
５秒となるようにすることを特徴とする請求項１記載の
残土利用トンネル裏込工法。3. The kneading of the residual soil used for the backing fine aggregate, the solidified material of the residual soil, and the auxiliary agent is 8 seconds to 1 second.
The tunnel filling method according to claim 1, wherein the time is set to 5 seconds.
範囲で固結材、及び、助剤を混合した裏込材となるよう
にすることを特徴とする請求項１記載の残土利用トンネ
ル裏込工法。4. The tunnel according to claim 1, wherein the backing material is a backing material in which a solidifying material and an auxiliary agent are mixed within a range suitable for backfilling the remaining soil mud. Backing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11222366A JP2001049994A (en) | 1999-08-05 | 1999-08-05 | Tunnel back-filling construction method of using surplus soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11222366A JP2001049994A (en) | 1999-08-05 | 1999-08-05 | Tunnel back-filling construction method of using surplus soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001049994A true JP2001049994A (en) | 2001-02-20 |
Family
ID=16781232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11222366A Pending JP2001049994A (en) | 1999-08-05 | 1999-08-05 | Tunnel back-filling construction method of using surplus soil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001049994A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008150810A (en) * | 2006-12-15 | 2008-07-03 | Taisei Corp | Backfill grouting material and backfill grouting method |
| JP2009133091A (en) * | 2007-11-29 | 2009-06-18 | Ohbayashi Corp | Treatment equipment, excavated sediment treatment method, excavator, tunnel construction method, and tunnel constructed by the construction method |
| JP2009185466A (en) * | 2008-02-04 | 2009-08-20 | Kajima Corp | Backfill grouting method, tunnel construction system, and tunnel construction method |
-
1999
- 1999-08-05 JP JP11222366A patent/JP2001049994A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008150810A (en) * | 2006-12-15 | 2008-07-03 | Taisei Corp | Backfill grouting material and backfill grouting method |
| JP2009133091A (en) * | 2007-11-29 | 2009-06-18 | Ohbayashi Corp | Treatment equipment, excavated sediment treatment method, excavator, tunnel construction method, and tunnel constructed by the construction method |
| JP2009185466A (en) * | 2008-02-04 | 2009-08-20 | Kajima Corp | Backfill grouting method, tunnel construction system, and tunnel construction method |
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