JPH0470448B2 - - Google Patents
Info
- Publication number
- JPH0470448B2 JPH0470448B2 JP2311201A JP31120190A JPH0470448B2 JP H0470448 B2 JPH0470448 B2 JP H0470448B2 JP 2311201 A JP2311201 A JP 2311201A JP 31120190 A JP31120190 A JP 31120190A JP H0470448 B2 JPH0470448 B2 JP H0470448B2
- Authority
- JP
- Japan
- Prior art keywords
- shield machine
- cylinder
- open
- water
- open shield
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000009412 basement excavation Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 239000011440 grout Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 description 10
- 239000003673 groundwater Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、高水位で極軟悪質の地盤中に筒体を
縦列に布設し、人、車輌、水、ケーブルその他を
通過させる地中トンネルを施工する筒体の地中布
設方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an underground tunnel in which cylindrical bodies are laid in tandem in extremely soft and bad ground at a high water level, and through which people, vehicles, water, cables, etc. can pass. This invention relates to an underground installation method for a cylindrical body.
このような筒体の地中布設方法としてオープン
シールド工法がある。
There is an open shield construction method as a method for laying such a cylinder underground.
これは、縦坑による発進基地から前後端および
上面開口のオープンシールド機を発進させるが、
該オープンシールド機の掘進はフロント部先端の
土砂を地上等から掘削・排土してシールドジヤツ
キで行い、また掘進後オープンシールド機内でこ
の掘進分に新たな筒体を据え付けて、掘進と筒体
の据え付け工程を繰り返すものである。 This launches an open shield machine with openings at the front and rear ends and on the top from a launch base in a vertical shaft.
Excavation of the open shield machine is carried out by excavating and removing the earth and sand from the ground at the tip of the front part using a shield jack, and after excavation, a new cylinder is installed in the excavation area in the open shield machine, and the excavation and the cylinder are carried out. The process of installing the body is repeated.
このオープンシールド工法では、シールド機の
形状が前後端および上面開口という開放面の多い
ものであることから、地下水位の高い砂質層やＮ
値が０前後の極軟弱地層中に各種筒体を布設する
場合は、地下水又は極軟シルトがシールド機の前
後から押しよせ、シールド機内に流入してシール
ド掘進は不可能に近く、また、たとえ掘進できた
としても上下の勾配の凹凸狂いが甚だしくシール
ドテール内で据付ける完成筒体の勾配が大きく狂
い設計図通り布設できないという問題がある。 In this open shield construction method, the shape of the shield machine has many open surfaces such as front and rear ends and openings on the top surface, so it
When installing various types of cylinders in extremely soft strata with a value of around 0, groundwater or extremely soft silt will be pushed from the front and back of the shield machine and flow into the shield machine, making shield excavation almost impossible. Even if the tunnel could be excavated, there is a problem in that the unevenness of the vertical slope is so extreme that the slope of the completed cylindrical body to be installed inside the shield tail is greatly distorted, making it impossible to install it according to the design drawings.
このような問題に対処するには、薬液注入によ
る地盤改良を行つてから施工するのが普通であつ
た。 To deal with such problems, it was common practice to improve the ground by injecting chemicals before construction began.
前記のように従来のオープンシールド工法では
前記の悪質地盤に対してはほとんど用いられない
か又は薬液注入による地盤改良の補助工法を必要
としている。
As mentioned above, the conventional open shield construction method is hardly used for the above-mentioned bad ground, or requires an auxiliary construction method for ground improvement using chemical injection.
しかし、薬液注入による地盤改良の補助工法は
悪質地盤のすべてにわたり施す必要があり、膨大
な工期と工費が必要となる。 However, the auxiliary method of ground improvement using chemical injection needs to be applied to all of the poor ground, requiring a huge amount of construction time and cost.
本発明の目的は前記従来例の不都合を解消し、
オープンシールド工法で高価な薬液注入等の地盤
改良工法の併用なくして地下水位の高い砂質層や
極軟弱シルト層中でも筒体を適正に布設すること
ができる筒体の地中布設方法を提供することにあ
る。 The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide an underground installation method for a cylinder, which allows the cylinder to be properly installed even in a sandy layer or extremely soft silt layer with a high groundwater level without using the open shield method in combination with expensive chemical injection or other ground improvement methods. There is a particular thing.
本発明は前記目的を達成するため、前後端およ
び上面開口のオープンシールド機内に筒体を据え
付け、この筒体及びそれに後続する筒体を反力に
シールドジヤツキでオープンシールド機を掘進さ
せ、オープンシールド機内でこの掘進分に新たな
筒体を据え付けて同様の工程を繰り返す筒体の地
中布設方法において、オープンシールド機のフロ
ント部内部に前後に区画する止水壁を設け、オー
プンシールド機の推進に伴いこの止水壁によりオ
ープンシールド機前方の切羽部土砂を圧密脱水
し、これを掘削排土し、また、テール部底面に高
さ調整具を配設し、その上に筒体を据付け、さら
に、筒体前面には左右方向に押広げ自在な押当兼
側面止水枠を当てこれを左右に押し開いてテール
部内面に密着させ、次いで、筒体上部よりグラウ
ト材を筒体外周とテール部間の空隙部に填充した
後、シールドジヤツキで押当兼止水枠体を介して
筒体を反力としてオープンシールド機を掘進さ
せ、筒体とその外周のグラウト材よりなる方形の
バツケージをシールド機前進後の溝内に残置し、
該溝内周と前記パツケージ外周面間の小隙間にグ
ラウト材を注入填充することを要旨とするもので
ある。
In order to achieve the above object, the present invention installs a cylindrical body in an open shield machine with openings at the front and rear ends and the top surface, and excavates the open shield machine with a shield jack using this cylindrical body and the following cylindrical body as a reaction force, and opens the open shield machine. In the method of underground installation of cylinders, in which a new cylinder is installed in the excavated area in the shield machine and the same process is repeated, a water-stop wall is installed inside the front part of the open shield machine to divide it into front and rear sections, and During propulsion, this water-stop wall is used to compact and dewater the earth and sand at the face in front of the open shield machine, which is then excavated and removed.A height adjustment device is also installed on the bottom of the tail section, and a cylindrical body is installed on top of it. Furthermore, on the front of the cylinder, a presser and side water stopper frame that can be pushed out in the left and right directions is placed, and this is pushed open left and right to bring it into close contact with the inner surface of the tail part.Then, grout material is applied from the top of the cylinder to the outer periphery of the cylinder. After filling the gap between the cylindrical body and the tail part, the open shield machine is used to dig through the pushing and water-stopping frame with a shield jack using the cylindrical body as a reaction force, and the rectangular shape made of the cylindrical body and the grout material on its outer periphery is Leave the bag cage in the groove after the shield machine moves forward,
The gist is to inject and fill a small gap between the inner periphery of the groove and the outer periphery of the package with grout material.
〔作用〕
本発明によれば、オープンシールド機のフロン
ト部の前からシールド機内へ侵入する泥土水は止
水壁で阻止され、かつ、オープンシールド機前方
の切羽部は、フロント部内の止水壁により圧密脱
水されて、水位が上るか、軟泥土がフロント部内
に盛上り、これが周辺地盤の地下水または地盤を
加圧気味に圧迫するので、これを掘削しつつ直ち
にオープンシールド機を前進すれば切羽部周辺に
発生する地盤の変移は皆無に近いものとなる。[Function] According to the present invention, muddy water entering the shield machine from in front of the front part of the open shield machine is blocked by the water cutoff wall, and the face part in front of the open shield machine is blocked by the water cutoff wall in the front part. As a result, the water level rises or soft mud builds up inside the front section, which puts pressure on the groundwater or ground in the surrounding ground, so if you move the open shield machine forward immediately while excavating this, the face will be removed. There will be almost no ground displacement around the area.
また、テール部後方からの地下水泥土は筒体周
辺とテール部内面間の間隙に充填されるグラウト
材で侵入が阻止される。 Further, groundwater mud from behind the tail portion is prevented from entering by the grout material filled in the gap between the periphery of the cylinder and the inner surface of the tail portion.
さらに、筒体前面に左右方向に押広げ自在な押
当兼側面止水枠を当て、これをオープンシールド
機のシールドジヤツキにて軽く押圧支持し、かつ
この押当兼止水枠体は左右に押し開いてテール部
内面に密着させることで、筒体周辺とテール部内
面間の間隙に充填するグラウト材がテール部内で
この押当兼止水枠体より前に流出するのを防止で
きる。 Furthermore, a pushing and side water-stopping frame that can be pushed out in the left and right directions is placed on the front of the cylinder, and this is lightly pressed and supported by the shield jack of the open shield machine. By pushing it open and bringing it into close contact with the inner surface of the tail portion, it is possible to prevent the grout material filling the gap between the periphery of the cylinder and the inner surface of the tail portion from flowing out within the tail portion before this pressing/water-stopping frame.
これに加えて、筒体とその外周填充材の一体的
方形のパツケージをテール部後方の溝内に残置す
るので、溝内面と前記パツケージ外周間の隙間は
テール部の肉厚だけの僅少なものとなり、しかも
この僅少の隙間にもグラウト材の填充を行うの
で、在来オープンシールド工法で、掘削されるテ
ール部後方の方形の溝の内面と筒体外周間との大
なる空隙の填充時間の遅延による溝周辺からの地
下水と泥土の流入による地盤沈下と付近構造物変
移の問題はなくなる。 In addition, since the integral rectangular package consisting of the cylindrical body and its outer periphery filler is left in the groove behind the tail portion, the gap between the inner surface of the groove and the outer periphery of the package is as small as the thickness of the tail portion. Moreover, since this small gap is also filled with grout, the time needed to fill the large gap between the inner surface of the rectangular groove behind the excavated tail and the outer periphery of the cylinder in the conventional open shield construction method is reduced. The problems of ground subsidence and displacement of nearby structures due to the inflow of groundwater and mud from around the ditch due to delays will be eliminated.
以下、図面について本発明の実施例を詳細に説
明する。
Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明の筒体の地中布設方法の１実施
例を示す縦断側面図で、図中１は前後端および上
面開口のオープンシールド機である。 FIG. 1 is a longitudinal sectional side view showing one embodiment of the underground installation method of a cylindrical body according to the present invention, and numeral 1 in the figure is an open shield machine with front and rear ends and an opening on the top surface.
このオープンシールド機１は、シールドジヤツ
キ７を内装するもので、前部のフロント部１1内
には、これを前後に区画する止水壁１１を設け
る。 This open shield machine 1 has a shield jack 7 inside, and a water cutoff wall 11 is provided in the front part 11 to divide it into front and rear parts.
また、図中５は押当兼止水枠体で、これは後述
のごとくオープンシールド機１後部のテール部１
２の内部に据付けられる筒体３の前面に配置され
るもので、外形がコ字状又は逆コ字状の押当兼側
面止水枠体５2と、この止水枠体５2の開放部側に
小ジヤツキ６で強固に連結した押当兼側面止水枠
柱５1の組合せからなり、この押当兼止水枠体５
はテール部１2および筒体３の接触面にスポンジ
等のシール材を介在させて使用する。 In addition, numeral 5 in the figure is a pusher and water stopper frame, which is the tail part 1 at the rear of the open shield machine 1, as described later.
2 , which is placed on the front side of the cylinder 3 that is installed inside the body, and has a U-shaped or inverted U-shaped outer shape and a pusher and side water-stopping frame 52 , and an opening for this water-stopping frame 52 . It consists of a combination of pusher/side water stopper frame pillars 5 1 that are firmly connected with small jacks 6 on the side, and this pusher/side water stopper frame 5
is used by interposing a sealing material such as a sponge on the contact surfaces of the tail portion 12 and the cylinder body 3.
発進基地上にオープンシールド機１を据え付
け、このオープンシールド機１のテール部１2内
に筒体３をセツトして、この筒体３および発進基
地内の反力壁を反力にシールドジヤツキ７でオー
プンシールド機１を推進させる。 The open shield machine 1 is installed on the starting base, the cylinder 3 is set inside the tail part 12 of the open shield machine 1, and the shield jack is mounted using the reaction force of the cylinder 3 and the reaction wall inside the launch base. 7 to propel open shield aircraft 1.
この推進は掘進となり、フロント部１1の切羽
を地上からシヤベルカー等の掘削機で掘削排土
し、この掘削排土部分にはオープンシールド機１
を前進させる。 This propulsion becomes excavation, and the face of the front part 1 1 is excavated from the ground with an excavator such as a shovel car, and the open shield machine 1
advance.
そして、オープンシールド機１が前進したなら
ば、シールドジヤツキ７を縮め、筒体３の前に新
たな筒体３を吊り降ろして再度オープンシールド
機１を掘進させることになる。 Then, when the open shield machine 1 moves forward, the shield jack 7 is retracted, a new cylinder 3 is suspended in front of the cylinder 3, and the open shield machine 1 is made to dig again.
このようなオープンシールド機１の掘進に際
し、フロント部１1の前面すなわち切羽からシー
ルド機１内へ侵入する泥土水は止水壁１１で阻止
されるが、特にこの止水壁１１はオープンシール
ド機１の前進とともに前進して切羽土砂を圧密す
る。 When the open shield machine 1 excavates in this manner, mud and water entering the shield machine 1 from the front surface of the front part 11 , that is, from the face, is blocked by the water cutoff wall 11. In particular, this water cutoff wall 11 is As step 1 advances, it moves forward and consolidates the face earth and sand.
その結果、圧密脱水される切羽部の地下水位は
在来地下水位より上昇し、切羽周辺土砂を加圧し
て周囲地盤の沈下を防ぎ切羽の圧密土砂だけを掘
削機にて掘削排土することができる。 As a result, the groundwater level at the face to be consolidated and dewatered rises above the conventional groundwater level, and the earth and sand around the face is pressurized to prevent the surrounding ground from subsidence and only the consolidated earth and sand at the face can be excavated and removed using an excavator. can.
なお、前記発進基地において、オープンシール
ド機１の据え付けは、テール部１2底面に配置す
る高さ調整具４の高さ分を考慮して、この分だけ
計画掘進ラインより下に位置させるようにする。 In addition, at the starting base, the open shield machine 1 is installed so that it is positioned below the planned excavation line by this amount, taking into account the height of the height adjustment tool 4 placed on the bottom of the tail part 12 . do.
極軟悪質地盤中においては、オープンシールド
機１も沈下しやすいので設計勾配通りに前進する
ことができず必然的に凹凸の高低差を生じなが
ら、蛇行掘削ラインのＢ線（第６図）上を進行す
ることになる。 In extremely soft and bad ground, the open shield machine 1 also tends to sink, making it impossible to move forward according to the designed slope, which inevitably creates uneven height differences, while moving on Line B of the meandering excavation line (Fig. 6). will proceed.
従つて、土質により生ずる凸部の高さ分だけを
下に下げて、施工計画線より深い位置を上下波打
ちながら掘進させるものである。 Therefore, the excavation is done by lowering the height of the convex part caused by the soil quality, and excavating at a deeper position than the construction plan line while undulating up and down.
オープンシールド機１が掘進したならば、シー
ルドジヤツキ７を縮め、テール部１2の底面にコ
ンクリートブロツク等からなる高さ調整具４を配
置し、この高さ調整具４の上に地上から吊り降ろ
す筒体３を正しい設計高の底部勾配ラインＡ線
（第５図）上に沿わせて据付け、かつ後続の筒体
３と鋼棒その他で接続する。 Once the open shield machine 1 has dug, the shield jack 7 is retracted, a height adjustment tool 4 made of a concrete block or the like is placed on the bottom of the tail section 12 , and the machine is suspended from the ground on top of the height adjustment tool 4. The cylindrical body 3 to be lowered is installed along the bottom slope line A line (FIG. 5) at the correct design height, and connected to the succeeding cylindrical body 3 with a steel rod or the like.
次いで、この筒体３の前端に押当兼止水枠体５
を配置する。 Next, a pressing/water-stopping frame 5 is attached to the front end of this cylinder 3.
Place.
該押当兼止水枠体５は小ジヤツキ６を縮めて全
体を縮小した状態で地上からの吊り降ろし、吊り
上げを行い、筒体３の前面ではこれをオープンシ
ールド機１のシールドジヤツキ７で軽く押圧支持
する。 The pushing/water-stopping frame 5 is lowered and lifted from the ground with the small jack 6 contracted to reduce the overall size, and on the front of the cylindrical body 3, it is suspended by the shield jack 7 of the open shield machine 1. Lightly press and support.
かつ、小ジヤツキ６を伸ばしてこれを左右方向
に押広げ、テール部１2の内面に密着させる。 In addition, the small jack 6 is stretched and pushed apart in the left and right direction, so that it is brought into close contact with the inner surface of the tail portion 12 .
その際に、筒体３周辺とテール部１2間及び筒
体３の前面と押当兼止水枠体５間との間隙部９を
使用済のマツトレスなどのスポンジを利用したシ
ール材でシールする。 At that time, seal the gap 9 between the periphery of the cylinder 3 and the tail part 1 2 and between the front surface of the cylinder 3 and the pressing/water-stopping frame 5 with a sealant using a sponge such as a used pine tress. do.
そして、筒体３の上部よりセメントミルクや水
ガラス＋セメント（LW）などの各種グラウト材
２を注入填充し、テール部１2と筒体３との間隙
部９にグラウト材２を填充する。 Then, various grouting materials 2 such as cement milk or water glass + cement (LW) are injected into the upper part of the cylinder 3, and the gap 9 between the tail part 12 and the cylinder 3 is filled with the grouting material 2.
前記押当兼止水枠体５があるので、このグラウ
ト材２はテール部１2内でこの押当兼止水枠体５
により前に流出することはない。 Since there is the above-mentioned holding and water-stopping frame 5, this grout material 2 is applied to the holding and water-stopping frame 5 within the tail portion 12.
This prevents it from leaking out beforehand.
このようにしてから、シールドジヤツキ７によ
り押当兼止水枠体５を介して筒体３を反力として
（方向修正ジヤツキ７′でフロント部１1の方向を
修正しながら）オープンシールド機１を地中に推
進させる。 After doing this, the shield jack 7 applies a reaction force to the cylindrical body 3 via the pushing and water-stopping frame 5 (while correcting the direction of the front part 11 with the direction correction jack 7'). Propel 1 underground.
該オープンシールド機１が推進すると、テール
部１2後方に掘られた跡の溝１０内に筒体３を内
包するグラウト材２のパツケージが残置される。 When the open shield machine 1 is propelled, a package of grout material 2 containing a cylinder 3 is left behind in a groove 10 dug behind the tail portion 12.
そこで、テール部１2の進行中にこのパツケー
ジと溝１０間に存在するテール部肉厚に相当する
僅少の間隙部９′にグラウト材２を填充する。 Therefore, while the tail portion 12 is advancing, a small gap 9' corresponding to the thickness of the tail portion existing between the package and the groove 10 is filled with the grout material 2.
前記一連の作業を一サイクル工程とし、シール
ド掘進作業が完了すると押当兼止水枠体５を前方
へ移動して、テール部１2内に再び高さ調整具４
を所要高さに修正し、この上に筒体３を第５図に
示す正しい設計勾配ラインＡに合わせて据付け、
前記の作業を繰返す。 The series of operations described above is considered to be one cycle process, and when the shield excavation work is completed, the pressing/water-stopping frame 5 is moved forward and the height adjustment tool 4 is inserted again into the tail portion 1 2 .
Correct the height to the required height, and install the cylinder 3 on top of it in line with the correct design slope line A shown in Figure 5.
Repeat the above steps.
先にも述べたように、極軟弱地盤中へのシール
ド機の掘進操作は困難な作業で、どうしてもシー
ルド機の上下の狂いは避けられない。 As mentioned earlier, operating a shield machine to dig into extremely soft ground is a difficult task, and it is inevitable that the shield machine will go up and down incorrectly.
そこで、本発明は地質と経験実績により、シー
ルド機の上下凹凸高さを算定し（多くの場合５cm
前後）はじめからシールド機１の掘進深さをこの
凹凸の凸部の高さ（５cm前後）分だけ、深く掘進
させて行き、後部テール部の底面に高さ調整具４
を据付けて、この上に筒体３の底部の高さを正し
い計画勾配ラインの高さにセツトすることによ
り、オープンシールド機１は、上下に凹凸の波形
の掘進勾配を取り乍ら、掘進してゆくが、筒体３
は正しい計画勾配高さに常にセツトされて正しい
設計勾配ライン上に布設されていく。 Therefore, the present invention calculates the height of the vertical unevenness of the shield machine based on the geology and experience (in most cases, it is 5 cm).
(Back and forth) From the beginning, make the shield machine 1 dig deeper by the height of the convex part of this unevenness (about 5 cm), and then attach the height adjustment tool 4 to the bottom of the rear tail part.
By setting the height of the bottom of the cylinder 3 to the height of the correct planned slope line, the open shield machine 1 can excavate while creating a corrugated excavation slope with vertical unevenness. However, cylinder body 3
is always set at the correct planned slope height and installed on the correct designed slope line.
以上述べたように本発明の筒体の地中布設方法
は、従来のオープンシールド機を用いたオープン
シールド工法では高価な薬液注入等の地盤改良工
法の補助工法の併用なくしては施工が不可能とさ
れた地下水位の高い砂質層やＮ値が０又は、モン
ケンが自沈するなどの極軟弱シルト層中でも、こ
の補助工法なしに施工することができ、施工費の
コストダウンと工期の短縮を実現できるものであ
る。
As described above, the underground installation method of the cylindrical body of the present invention cannot be carried out using the conventional open shield method using an open shield machine without the use of auxiliary methods for ground improvement methods such as expensive chemical injection. It can be constructed without this auxiliary method even in sandy layers with high groundwater levels, N values of 0 or extremely soft silt layers such as those where Monken scuttles, reducing construction costs and shortening the construction period. This is something that can be achieved.
第１図は本発明の筒体の地中布設方法の１実施
例を示す側面図、第２図は第１図のＡ−Ａ線断面
図、第３図は同上Ｂ−Ｂ線断面図、第４図は同上
Ｃ−Ｃ線断面図、第５図は本発明のシールド掘削
蛇行ラインＢと、筒体設計布設ラインＡの関係を
示す説明図である。
１……オープンシールド機、１1……フロント
部、１2……テール部、２……グラウト材、３…
…筒体、４……高さ調整具、５……押当兼止水枠
体、５1……押当兼側面止水柱体、５2……押当兼
上下側面止水枠体、６……小ジヤツキ、７……シ
ールドジヤツキ、７′……方向修正ジヤツキ、９，
９′……間隙部、１０……溝、１１……止水壁。
FIG. 1 is a side view showing one embodiment of the underground installation method of a cylindrical body according to the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, and FIG. FIG. 4 is a sectional view taken along the line CC of the same as above, and FIG. 5 is an explanatory diagram showing the relationship between the shield excavation meandering line B of the present invention and the cylindrical body design and installation line A. 1... Open shield machine, 1 1 ... Front section, 1 2 ... Tail section, 2... Grout material, 3...
... Cylinder body, 4 ... Height adjuster, 5 ... Pushing and water stop frame body, 5 1 ... Pushing and side water stop column body, 5 2 ... Pushing and upper and lower side water stop frame body, 6 ...Small jack, 7...Shield jack, 7'...Direction correction jack, 9,
9′...Gap portion, 10...Groove, 11...Water stop wall.
Claims (1)
内に筒体を据え付け、この筒体及びそれに後続す
る筒体を反力にシールドジヤツキでオープンシー
ルド機を掘進させ、オープンシールド機内でこの
掘進分に新たな筒体を据え付けて同様の工程を繰
り返す筒体の地中布設方法において、オープンシ
ールド機のフロント部内部に前後に区画する止水
壁を設け、オープンシールド機の推進に伴いこの
止水壁によりオープンシールド機前方の切羽部土
砂を圧密脱水し、これを掘削排土し、また、テー
ル部底面に高さ調整具を配設し、その上に筒体を
据付け、さらに、筒体前面には左右方向に押広げ
自在な押当兼側面止水枠を当てこれを左右に押し
開いてテール部内面に密着させ、次いで、筒体上
部よりグラウト材を筒体外周とテール部間の空隙
部に填充した後、シールドジヤツキで押当兼止水
枠体を介して筒体を反力としてオープンシールド
機を掘進させ、筒体とその外周のグラウト材より
なる方形のバツケージをシールド機前進後の溝内
に残置し、該溝内周と前記パツケージ外周面間の
小隙間にグラウト材を注入填充することを特徴と
する筒体の地中布設方法。1. A cylinder is installed in an open shield machine with front and rear ends and top openings, and the open shield machine is excavated with a shield jack using the reaction force of this cylinder and the cylinders following it, and new excavation is made in the open shield machine. In the underground installation method for cylinders, in which the cylinder is installed and the same process is repeated, a water-stop wall is installed inside the front part of the open shield machine that divides it into front and rear sections, and as the open shield machine moves forward, this water-stop wall allows the water to open as the open shield machine moves forward. The earth and sand at the face in front of the shield machine is consolidated and dewatered, excavated and removed, and a height adjustment device is installed on the bottom of the tail section, and a cylinder is installed on top of it. Apply a presser/side water stopper frame that can be pushed out in any direction, push it open left and right to make it adhere to the inner surface of the tail, and then fill the gap between the outer periphery of the cylinder and the tail with grout from the top of the cylinder. After that, the open shield machine is made to dig using the cylinder body as a reaction force through the pushing and water-stopping frame using the shield jack, and the rectangular bag cage made of the cylinder body and the grout material on its outer periphery is inserted into the groove after the shield machine moves forward. A method for installing a cylindrical body underground, characterized in that grouting material is injected and filled into a small gap between the inner periphery of the groove and the outer periphery of the package.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2311201A JPH03169915A (en) | 1990-11-16 | 1990-11-16 | Underground laying of case body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2311201A JPH03169915A (en) | 1990-11-16 | 1990-11-16 | Underground laying of case body |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19678384A Division JPS6175196A (en) | 1984-09-21 | 1984-09-21 | Method and apparatus for laying cylinder in underground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03169915A JPH03169915A (en) | 1991-07-23 |
| JPH0470448B2 true JPH0470448B2 (en) | 1992-11-11 |
Family
ID=18014321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2311201A Granted JPH03169915A (en) | 1990-11-16 | 1990-11-16 | Underground laying of case body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03169915A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5155237B2 (en) * | 2009-04-06 | 2013-03-06 | 誠 植村 | Open shield machine and open shield method using this open shield machine |
| JP7185667B2 (en) * | 2020-07-31 | 2022-12-07 | 誠 植村 | Press bar for open shield method |
-
1990
- 1990-11-16 JP JP2311201A patent/JPH03169915A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03169915A (en) | 1991-07-23 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |