JP2007162323A - Wall body forming method and wall body - Google Patents

Wall body forming method and wall body Download PDF

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JP2007162323A
JP2007162323A JP2005359582A JP2005359582A JP2007162323A JP 2007162323 A JP2007162323 A JP 2007162323A JP 2005359582 A JP2005359582 A JP 2005359582A JP 2005359582 A JP2005359582 A JP 2005359582A JP 2007162323 A JP2007162323 A JP 2007162323A
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shield
forming
wall body
wall
excavated
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Isao Tsuruki
勇夫 鶴木
Senji Ishizuka
千司 石塚
Hiromichi Takatori
博道 高取
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Fukuda Corp
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Fukuda Corp
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<P>PROBLEM TO BE SOLVED: To provide an epoch-making wall body forming method facilitating construction and having excellent practicability without needing to jointly use a freezing method, a high pressure injection method or the like even to the natural ground with a large aquifer and an external force. <P>SOLUTION: In the wall body forming method, a plurality of columnar or cylindrical shielding bodies disposed at the natural ground 1 are juxtaposed in a connected state, wherein the first shielding bodies 3 provided with excavated parts 3a at the side parts are disposed at predetermined intervals at the natural ground 1, and then the second shielding bodies 5 are disposed between the first shielding bodies 3 while excavating the excavated parts 3a of the first shielding bodies 3. The second shielding bodies 5 and the first shielding bodies 3 are connected to form a wall body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、壁体の形成方法及び壁体に関するものである。   The present invention relates to a method for forming a wall and a wall.

従来のパイプルーフ工法は、例えば、地山に所定距離をおいて形成された立坑間に、並列にして環状に複数の横抗を掘削しながらこの横抗内に夫々鋼管を配設し、この夫々の鋼管を連結することで、地中に囲繞状態のパイプルーフを形成し、このパイプルーフの内方を掘削しつつ支保工を設け、該パイプルーフ内に地下道等を構築する工法である。   In the conventional pipe roof construction method, for example, a steel pipe is disposed in each side of the shaft while excavating a plurality of sides in a ring in parallel between shafts formed at a predetermined distance in the natural ground. This is a construction method in which each steel pipe is connected to form an enclosed pipe roof in the ground, a support is provided while excavating the inside of the pipe roof, and an underground passage is constructed in the pipe roof.

ところで、従来のパイプルーフを構成する各鋼管の側部には、隣接する鋼管同士を連結するための継手が突設されており、鋼管同士はこの継手を介して連結されている。具体的には、例えば特許文献1(特開2004−251049号公報)の図1に開示されるように隣接する各管体の側部には夫々雌継手と雄継手が突設されている。   By the way, the joint for connecting adjacent steel pipes protrudes in the side part of each steel pipe which comprises the conventional pipe roof, and the steel pipes are connected through this joint. Specifically, for example, as disclosed in FIG. 1 of Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-251049), a female joint and a male joint project from the side portions of the adjacent tubular bodies.

しかしながら、側部に継手を突設した鋼管を連結してパイプルーフを形成する際には以下の2点が問題となる。   However, the following two points become a problem when a pipe roof is formed by connecting a steel pipe having a joint projecting from its side.

(1)一般的な掘削装置の回転カッターでは継手部分を正確に掘削することが難しく、そのため全体的に余掘をするか、その部分は掘削しないで推進することになる。他の方法としては特殊なカッターで継手の形状をなぞって掘削することも可能ではあるが、構造が複雑になりコストも高くなる。また、先行管と連結された状態での推進では、継手付近は掘削できない。   (1) With a rotary cutter of a general excavator, it is difficult to excavate the joint portion accurately, so that the entire portion is overexcavated or the portion is propelled without being excavated. As another method, it is possible to perform excavation by tracing the shape of the joint with a special cutter, but the structure becomes complicated and the cost increases. Further, in the propulsion in a state where it is connected to the preceding pipe, the vicinity of the joint cannot be excavated.

(2)地下水が多く含まれる滞水層に管体を推進配設する場合には、坑口の止水が困難となる。即ち、継手を含む鋼管の外形状に合わせた止水パッキンが必要となり、構造が複雑となり極めて厄介となる。また、先行管と連結された状態での止水は更に複雑となる。   (2) When a pipe body is propelled and arranged in a water-absorbing layer containing a lot of groundwater, it is difficult to stop water at the wellhead. That is, a water-stopping packing adapted to the outer shape of the steel pipe including the joint is required, which makes the structure complicated and extremely troublesome. Moreover, the water stop in the state connected with the preceding pipe is further complicated.

(3)継手部の厚みが薄く、また、剛性が小さいため、パイプルーフ構造の弱点となる。   (3) Since the joint portion is thin and has low rigidity, it becomes a weak point of the pipe roof structure.

以上から、従来のパイプルーフ工法は滞水層や外力の大きい地山では止水や構造補強の方法として別方法、例えば、凍結工法や高圧噴射注入工法などと併用して施工しているのが現状である。   From the above, the conventional pipe roof construction method is applied in combination with other methods, such as the freezing construction method and the high-pressure injection injection construction method, as a method of water stoppage and structural reinforcement in aquifers and grounds with large external forces. Currently.

特開2004−251049号公報JP 2004-251049 A

本発明は、上述のような現状に鑑み成されたもので、パイプルーフ(壁体)を構成する遮蔽体を配設する際に止水を良好に行うことができ、また、強度が全体的に向上し、例えば滞水層や外力の大きい地山にも容易に施工可能な極めて実用性に秀れた画期的な壁体の形成方法及び壁体を提供するものである。   The present invention has been made in view of the current situation as described above, and can provide a good water stop when arranging a shielding body constituting a pipe roof (wall body), and has an overall strength. The present invention provides an innovative method for forming a wall body and a wall body, which can be easily applied to, for example, an aquifer or a natural ground with a large external force, and has excellent practicality.

添付図面を参照して本発明の要旨を説明する。   The gist of the present invention will be described with reference to the accompanying drawings.

地山1に配設される柱状若しくは筒状の遮蔽体を複数連設状態で並設して成る壁体の形成方法であって、地山1に所定間隔をおいて側部に被掘削部3aが設けられた第一遮蔽体3を配設し、続いて、前記第一遮蔽体3の被掘削部3aを掘削しながら該第一遮蔽体3の間に第二遮蔽体5を配設し、この第二遮蔽体5と前記第一遮蔽体3とを連設して壁体とすることを特徴とする壁体の形成方法に係るものである。   A method for forming a wall body in which a plurality of columnar or cylindrical shields arranged in a natural ground 1 are arranged side by side in a continuous state, and a portion to be excavated on a side of the natural ground 1 at a predetermined interval The first shielding body 3 provided with 3a is disposed, and then the second shielding body 5 is disposed between the first shielding bodies 3 while excavating the excavated portion 3a of the first shielding body 3. The second shielding body 5 and the first shielding body 3 are connected to form a wall body, which is related to a method for forming a wall body.

また、請求項1記載の壁体の形成方法において、前記被掘削部3aは複数であって対向状態に設けられていることを特徴とする壁体の形成方法に係るものである。   Further, in the method for forming a wall body according to claim 1, there is provided a wall body forming method characterized in that a plurality of the excavated portions 3a are provided in an opposed state.

また、請求項1,2いずれか1項に記載の壁体の形成方法において、前記第二遮蔽体5には、前記被掘削部3aが掘削された際に形成される凹状部3bと嵌合する凸状部5aが形成されていることを特徴とする壁体の形成方法に係るものである。   Further, in the method of forming a wall body according to any one of claims 1 and 2, the second shield body 5 is fitted with a concave portion 3b formed when the excavated portion 3a is excavated. The present invention relates to a method for forming a wall, characterized in that a convex portion 5a is formed.

また、請求項1〜3いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体3は、前記地山1に所定間隔をおいて掘削される第一坑2に配設されるものであり、前記第二遮蔽体5は、前記第一遮蔽体3の間に掘削される第二坑4に配設されるものであることを特徴とする壁体の形成方法に係るものである。   Moreover, in the formation method of the wall body of any one of Claims 1-3, said 1st shielding body 3 is arrange | positioned by the 1st mine 2 excavated by the said natural ground 1 at predetermined intervals. The second shielding body 5 is disposed in a second pit 4 excavated between the first shielding bodies 3, and relates to a method of forming a wall body It is.

また、請求項4記載の壁体の形成方法において、前記第一坑2及び前記第二坑4は横坑であることを特徴とする壁体の形成方法に係るものである。   5. The wall forming method according to claim 4, wherein the first mine 2 and the second mine 4 are horizontal pits.

また、請求項4、5いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体3と前記第一坑2若しくは前記第二遮蔽体5と前記第二坑4は、夫々略同断面形状に設定されていることを特徴とする壁体の形成方法に係るものである。   Moreover, in the formation method of the wall body of any one of Claim 4, 5, said 1st shielding body 3 and said 1st mine 2 or said 2nd shielding body 5 and said 2nd mine 4 are respectively substantially. The present invention relates to a method of forming a wall body having the same cross-sectional shape.

また、請求項4〜6いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体3若しくは前記第二遮蔽体5は、断面視略円形状であることを特徴とする壁体の形成方法に係るものである。   The wall body forming method according to any one of claims 4 to 6, wherein the first shield body 3 or the second shield body 5 has a substantially circular shape in a sectional view. This relates to the forming method.

また、請求項4〜7いずれか1項に記載の壁体の形成方法において、前記第一坑2と該第一坑2に配設された前記第一遮蔽体3の外周面との間若しくは前記第二坑4と該第二坑4に配設された前記第二遮蔽体5の外周面との間に、裏込め注入材を充填することを特徴とする壁体の形成方法に係るものである。   Moreover, in the formation method of the wall body of any one of Claims 4-7, Between the said 1st mine 2 and the outer peripheral surface of the said 1st shielding body 3 arrange | positioned in this 1st mine 2, or A method of forming a wall body characterized by filling a backfilling injection material between the second mine 4 and the outer peripheral surface of the second shield 5 disposed in the second mine 4 It is.

また、請求項1〜8いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体3は、少なくとも被掘削部3aを含む一部が低強度部材で形成されていることを特徴とする壁体の形成方法に係るものである。   Moreover, in the formation method of the wall body of any one of Claims 1-8, as for said 1st shielding body 3, a part including at least excavated part 3a is formed with the low strength member. This relates to a method for forming a wall body.

また、請求項9記載の壁体の形成方法において、前記第一遮蔽体3は、その全部が低強度部材で形成されていることを特徴とする壁体の形成方法に係るものである。   The wall forming method according to claim 9, wherein the first shield 3 is formed of a low-strength member.

また、請求項1〜10いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体3は、側部に凹状部6が形成された第一管体7の該凹状部6に充填され前記被掘削部3aとなる充填材8が充填されたものであることを特徴とする壁体の形成方法に係るものである。   Moreover, in the formation method of the wall body of any one of Claims 1-10, said 1st shielding body 3 is the said recessed part 6 of the 1st tubular body 7 in which the recessed part 6 was formed in the side part. The present invention relates to a method for forming a wall, which is filled with a filler 8 which is filled and becomes the excavated portion 3a.

また、請求項11記載の壁体の形成方法において、前記第一管体7は鋼管であることを特徴とする壁体の形成方法に係るものである。   The wall forming method according to claim 11, wherein the first tubular body 7 is a steel pipe.

また、請求項11,12いずれか1項に記載の壁体の形成方法において、前記第一管体7の内部を固化材で充填することを特徴とする壁体の形成方法に係るものである。   The wall body forming method according to any one of claims 11 and 12, wherein the inside of the first tube body 7 is filled with a solidifying material. .

また、請求項1〜13いずれか1項に記載の壁体の形成方法において、前記第二遮蔽体5は、前記第一遮蔽体3より小径であることを特徴とする壁体の形成方法に係るものである。   The method for forming a wall body according to any one of claims 1 to 13, wherein the second shield body 5 has a smaller diameter than the first shield body 3. It is concerned.

また、請求項1〜14いずれか1項に記載の壁体の形成方法において、前記第二遮蔽体5は、第二管体9から成ることを特徴とする壁体の形成方法に係るものである。   The method for forming a wall body according to any one of claims 1 to 14, wherein the second shielding body 5 is composed of a second tubular body 9. is there.

また、請求項15記載の壁体の形成方法において、前記第二管体9は鋼管であることを特徴とする壁体の形成方法に係るものである。   The wall forming method according to claim 15, wherein the second tubular body 9 is a steel pipe.

また、請求項1〜16いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体3と前記第二遮蔽体5とを連設して成る壁体は、囲繞状態の壁体であり、前記壁体形成後、該壁体の内方を掘削することを特徴とする壁体の形成方法に係るものである。   The wall body forming method according to any one of claims 1 to 16, wherein the wall body formed by connecting the first shield body 3 and the second shield body 5 is an enclosed wall body. And, after the wall body is formed, the inner side of the wall body is excavated.

また、地山1に並列に掘削された坑内に配設される遮蔽体を複数連設状態で並設して成る壁体であって、地山1に所定間隔をおいて配設され側部に一対の凹状部3bが形成された鋼管から成る第一管体7と、該第一管体7間に配設され、前記第一管体7の凹状部6に夫々嵌合する一対の凸状部5aが形成された鋼管から成る第二管体9とが複数連設されていることを特徴とする壁体に係るものである。   Further, the wall body is formed by arranging a plurality of shields arranged in parallel in the pit excavated in parallel to the natural ground 1, and arranged on the natural ground 1 at a predetermined interval. A first tubular body 7 made of a steel pipe having a pair of concave portions 3b formed thereon, and a pair of protrusions disposed between the first tubular bodies 7 and fitted into the concave portions 6 of the first tubular body 7, respectively. A plurality of second tubular bodies 9 made of steel pipes having a shape-shaped portion 5a are provided in series, and the wall body is characterized in that it is characterized in that

本発明は、上述のようにしたから、予め第一遮蔽体に設けられた被掘削部を掘削することで第二遮蔽体と嵌合する凹状部を形成することができ、従来のように側部に継手を突設する必要がなく、それだけ止水を良好に行えることになり、また、剛性の高い第二遮蔽体を継手としたから、構造上の強度(せん断応力・曲げ応力への耐力)が全体的に向上し、例えば滞水層や土圧・水圧などの外力が大きく作用する地山にも容易に施工可能な極めて実用性に秀れた画期的な壁体の形成方法となる。   Since the present invention is configured as described above, it is possible to form a concave portion that fits into the second shield by excavating the excavated portion provided in advance in the first shield. There is no need to project joints at the joints, and water can be stopped well. Also, since the rigid second shield is used as a joint, structural strength (resistance to shear stress and bending stress) ) Improved as a whole, for example, a revolutionary wall formation method with excellent practicality that can be easily applied to grounds where external forces such as aquifers and earth and water pressures act greatly. Become.

好適と考える本発明の実施形態を、図面に基づいて本発明の作用を示して簡単に説明する。   An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

地山1に所定間隔をおいて第一遮蔽体3を配設し、第一遮蔽体3の側部に予め設けられた被掘削部3aを掘削しながら第一遮蔽体3間に第二遮蔽体5を配設することで、第一遮蔽体3と第二遮蔽体5とを連設することができ、従来のように継手を側部に突設する必要なく、よって、例えば地下水が多く含まれる滞水層にも容易に施工可能となる。   The first shield 3 is disposed at a predetermined interval on the ground 1, and the second shield is provided between the first shields 3 while excavating the excavated portion 3 a provided in advance on the side of the first shield 3. By disposing the body 5, the first shield 3 and the second shield 5 can be connected to each other, and there is no need to project the joint on the side as in the prior art. It can also be easily applied to the contained aquifer.

また、第二遮蔽体5は、第一遮蔽体3と同様の構造であるため、剛性が高く、例えばこの第二遮蔽体5の凸状部5aと被掘削部3aである凹状部3bとが嵌合して抜け出しにくいことなどから、土圧や水圧が大きい地山でも壁体の施工が可能となる。   Further, since the second shield 5 has the same structure as the first shield 3, the rigidity is high. For example, the convex portion 5a of the second shield 5 and the concave portion 3b which is the excavated portion 3a are provided. Since it is difficult to come out by fitting, it is possible to construct a wall even in a natural ground where the earth pressure and water pressure are high.

また、第一遮蔽体3及び第二遮蔽体5の配置にそれ程精密な位置合わせを必要とせずに、第一遮蔽体3と第二遮蔽体5とを連設することができる。即ち、第一遮蔽体3の間に第二遮蔽体5を配設する方法のため、第一遮蔽体3同士の間隔が多少ずれたり、被掘削部3aの掘削が多少ラフであっても、第一遮蔽体3と第二遮蔽体5とを連設でき、よって、それだけ第一遮蔽体3及び第二遮蔽体5の配設を簡易に且つコスト安に行えることになる。   In addition, the first shield 3 and the second shield 5 can be connected to each other without requiring so precise positioning of the first shield 3 and the second shield 5. That is, due to the method of disposing the second shield 5 between the first shields 3, even if the interval between the first shields 3 is slightly shifted, or the excavation of the excavated portion 3a is somewhat rough, The first shielding body 3 and the second shielding body 5 can be connected to each other. Therefore, the first shielding body 3 and the second shielding body 5 can be arranged easily and at low cost.

また、特に本発明は、第一遮蔽体3として、地山1に配設する前に予め被掘削部3aが設けられたものを採用しているため、形状・品質をより均一化できるなど、確実なものとすることができる。この点、例えば、地中で前記被掘削部を形成しようとすると、地中での作業であるため品質確認ができず、形状・品質の均一化が困難となる。また、現場に被掘削部形成材を充填するための設備が必要で、それだけコスト高となり、更に、第一遮蔽体を推進して配設する場合には、前記設備ごと推進する必要があり施工に時間がかかる等の課題が発生する。   In particular, the present invention employs the first shield 3 that is provided with the excavated portion 3a in advance before being disposed on the natural ground 1, so that the shape and quality can be made more uniform, etc. It can be certain. In this regard, for example, if the portion to be excavated is to be formed in the ground, the quality cannot be confirmed because the work is performed in the ground, and it becomes difficult to make the shape and quality uniform. In addition, it is necessary to provide equipment for filling the drilled part forming material at the site, which increases the cost. Further, when the first shielding body is propelled and arranged, it is necessary to propel the equipment together. Such as it takes time to generate.

本発明の具体的な実施例1について図1〜4に基づいて説明する。   A specific embodiment 1 of the present invention will be described with reference to FIGS.

実施例1は、地山1に並列に掘削された横坑内に配設される遮蔽体を複数連設状態で並設して成る壁体の形成方法であって、掘削装置により地山1に所定間隔で第一坑2を複数掘削し、該第一坑2に、側部に予め被掘削部3aが設けられた第一遮蔽体3を配設し、続いて、前記第一遮蔽体3の被掘削部3aを掘削しながら該第一遮蔽体3間に掘削装置により第二坑4を複数掘削し、該第二坑4に、前記第一遮蔽体3の被掘削部3aを掘削して形成される凹状部3bに嵌合する凸状部5aを形成した第二遮蔽体5を配設することで、前記第一遮蔽体3と第二遮蔽体5とを連設し壁体を形成するものである。   Embodiment 1 is a method of forming a wall body in which a plurality of shields arranged in a horizontal shaft dug in parallel to a natural ground 1 are arranged in a row in a state where they are arranged in series. A plurality of first pits 2 are excavated at a predetermined interval, and a first shield 3 having a portion to be excavated 3a provided in advance on its side is disposed in the first mine 2, and then the first shield 3 While excavating the portion to be excavated 3a, a plurality of second pits 4 are excavated by the excavator between the first shields 3, and the excavated portion 3a of the first shield 3 is excavated in the second mine 4 By disposing the second shield 5 formed with the convex portion 5a that fits into the concave portion 3b, the first shield 3 and the second shield 5 are connected to form a wall. To form.

具体的には、図2に図示したように所定間隔をおいて地山1に穿設された立坑12(発進立坑及び到達立坑)間に、公知の後方に推進ジャッキを有する掘削装置で前記地山1に所定間隔(少なくとも第二遮蔽体5の直径以下)で第一坑2(横坑)を掘削すると共に、この第一坑2に、分割管体を前記推進ジャッキにより順次推進配設し、複数の分割管体を長さ方向に止水連結して第一遮蔽体3を配設し(図3参照)、続いて、前記第一遮蔽体3の被掘削部3aを掘削しながら該第一遮蔽体3間に前記同様の掘削装置で第二坑4を掘削すると共に、この第二坑4に、分割管体を前記推進ジャッキにより順次推進配設し、複数の分割管体を長さ方向に止水連結して第二遮蔽体5を配設し(図4参照)、この第一遮蔽体3と第二遮蔽体5とが交互に連結された囲繞状態の壁体の内方を支保工で支持しつつ掘削して空間部を形成し、この空間部に例えば図1に図示したような地下道10等を構築する。図中、符号11は地下道10を形成するためのボックスカルバートである。   Specifically, as shown in FIG. 2, a well-known excavator having a propulsion jack between the shafts 12 (starting shafts and reaching shafts) drilled in the natural ground 1 at a predetermined interval is used for the above-mentioned ground. The first mine 2 (horizontal mine) is excavated in the mountain 1 at a predetermined interval (at least equal to or smaller than the diameter of the second shield 5), and the divided pipes are sequentially propelled and arranged in the first mine 2 by the propulsion jack. The plurality of divided tubes are water-stopped in the length direction to dispose the first shield 3 (see FIG. 3), and then, while excavating the excavated portion 3a of the first shield 3, The second mine 4 is excavated between the first shields 3 with the same excavator as described above, and the divided pipes are sequentially propelled and arranged in the second mine 4 by the propulsion jack. The second shield 5 is disposed by water-stopping in the vertical direction (see FIG. 4), and the first shield 3 and the second shield 5 are alternately connected. The inner wall of the the surrounding conditions to form a space drilled while supporting at shoring, to build underpasses 10 such as illustrated in this space, for example, in FIG. In the figure, reference numeral 11 denotes a box culvert for forming the underpass 10.

従って、第一遮蔽体3に第二遮蔽体5の一部が嵌合して第一遮蔽体3と第二遮蔽体5とが連結されるから、第一遮蔽体3と第二遮蔽体5との重合部分が厚くなり、それだけ浸水経路が長くなるため、止水性が向上する。また、継手としての第二遮蔽体5は、厚みがある分剛性が高く、第一遮蔽体3の凹状部3bに嵌合していて外力による抜け出しなどに抵抗力が生じ、それだけ強度が向上する。更に、遮蔽体に継手を溶接等することなく、単に外形状を組み合わせるだけで連結するものであるから、施工が容易で、しかも、遮蔽体は回収して転用することもできる。   Accordingly, a part of the second shield 5 is fitted to the first shield 3 and the first shield 3 and the second shield 5 are connected. The polymerization portion becomes thicker, and the water immersion path becomes longer accordingly, so that the water stoppage is improved. Further, the second shield 5 as a joint has a high rigidity because of its thickness, and is fitted to the concave portion 3b of the first shield 3 to generate a resistance force against an escape by an external force, and the strength is improved accordingly. . Further, since the joint is connected to the shield by simply combining the outer shapes without welding or the like, the construction is easy, and the shield can be recovered and diverted.

実施例1においては、前記第一遮蔽体3と前記第一坑2及び前記第二遮蔽体5と前記第二坑4は、夫々略同断面形状に設定されている。具体的には、掘削装置として、断面視略円形状の第一坑2若しくは第二坑4を掘削する構成のものが採用され、第一遮蔽体3若しくは第二遮蔽体5として、第一坑2若しくは第二坑4と略同径且つ同断面形状のものが採用されている。   In Example 1, the said 1st shield 3, the said 1st well 2, and the said 2nd shield 5 and the said 2nd well 4 are each set to the substantially same cross-sectional shape. Specifically, as the excavator, one having a configuration for excavating the first mine 2 or the second mine 4 having a substantially circular shape in cross section is adopted, and the first shield 3 or the second shield 5 is used as the first mine. 2 or the second mine 4 having the same diameter and the same cross-sectional shape is employed.

従って、遮蔽体の側部に継手が突設される構成ではないから、止水パッキンにより第一坑2若しくは第二坑4と第一遮蔽体3若しくは第二遮蔽体5の外周面との間を簡易に且つ確実に閉塞でき、坑口からの湧水の漏出を阻止できる。また、第一坑2の掘削後のテールボイドが小さく、地山1崩落のおそれが小さい。   Therefore, since the joint is not protruded on the side portion of the shield, the water blocking packing between the first mine 2 or the second mine 4 and the outer periphery of the first shield 3 or the second shield 5 is used. Can be easily and reliably closed, and leakage of spring water from the wellhead can be prevented. Moreover, the tail void after excavation of the 1st mine 2 is small, and the possibility of the collapse of the natural ground 1 is small.

また、前記第一遮蔽体3としては、側部に断面視円弧状の凹状部6(凹条)が形成された金属製の第一管体7(鋼管)の該凹状部6に前記被掘削部3aとなる低強度部材から成る充填材8が充填されたものが採用されている。尚、第一遮蔽体3の凹状部6は、図1に図示したように、配設される位置に応じて対向状態に左右両側部や、上下側などいずれかに設ける。   Moreover, as said 1st shielding body 3, said to-be-excavated object is made into this concave-shaped part 6 of the metal 1st pipe body 7 (steel pipe) by which the concave part 6 (concave line) of the cross-sectional arc shape was formed in the side part. A material filled with a filler 8 made of a low-strength member serving as the portion 3a is employed. As shown in FIG. 1, the concave portion 6 of the first shield 3 is provided on either the left and right sides or the upper and lower sides in an opposed state depending on the position where it is disposed.

このように金属製の第一管体7を用いた場合には、剛性が大きくなり、構造上の強度が向上し、水,土等の荷重に対しての抵抗が向上する。即ち、実施例1に係る壁体を施工し、該壁体の内面に支保工を施す際、該支保工に必要とする部材をそれだけ少なくできる。また、厳しい条件下での仮設構造物や、より高い品質を求められる永久構造物への活用など、適用範囲が広がる。更に、金属製の第一管体7は、凹状部3bの形成が容易なため、安価な材料となる。尚、第一管体7としては、金属製に限らずプラスチック製等、他の材質としても良い。   Thus, when the metal 1st pipe body 7 is used, rigidity becomes large, the structural strength improves, and the resistance with respect to loads, such as water and soil, improves. That is, when the wall according to the first embodiment is constructed and the support is applied to the inner surface of the wall, the number of members required for the support can be reduced accordingly. In addition, the range of application is expanded, for example, to temporary structures under severe conditions and to permanent structures that require higher quality. Furthermore, the metal first tubular body 7 is an inexpensive material because the concave portion 3b can be easily formed. The first tube 7 is not limited to metal but may be made of other materials such as plastic.

特に実施例1においては、第一坑2に配設する前に、予め前記凹状部6に前記充填材8が充填された状態のものを第一坑2に配設するようにしている。従って、形状・品質などで確実なものを得ることができ(形状・品質を均一化でき)、また、被掘削部形成材を充填する設備も不要となり、推進工法で良好に施工可能となる。   In particular, in the first embodiment, before the first pit 2 is arranged, the first mine 2 is provided with the concave portion 6 filled with the filler 8 in advance. Accordingly, it is possible to obtain a reliable shape and quality (the shape and quality can be made uniform), and no equipment for filling the material to be excavated is required, and the propulsion method can be applied satisfactorily.

また、第一管体7の凹状部6の内面は、第二遮蔽体5の外形状(外面)よりやや大きい円弧に設定されている。   Further, the inner surface of the concave portion 6 of the first tubular body 7 is set to an arc that is slightly larger than the outer shape (outer surface) of the second shielding body 5.

尚、凹状部6に充填される充填材8を掘削する際に、この充填材8の一部を掘削するようにすると、第一管体7の配設位置が多少ずれていたとしても、干渉等が生じることなく良好に第二遮蔽体5を配設可能となる。   When excavating the filler 8 filled in the concave portion 6, if a part of the filler 8 is excavated, even if the arrangement position of the first tubular body 7 is slightly deviated, interference occurs. It is possible to arrange the second shielding body 5 satisfactorily without any occurrence.

低強度部材としては安価なモルタルが採用されている。従って、被掘削部3aの掘削時において掘削装置に過度の抵抗が生じることなく、良好に第二坑4を掘削できることになる。   An inexpensive mortar is used as the low-strength member. Therefore, the second mine 4 can be excavated satisfactorily without causing excessive resistance in the excavator during excavation of the excavated portion 3a.

この第一遮蔽体3は、前記左右両側部の凹状部6にモルタルが前記第一坑2への配設前に充填されることで、断面視略円形状となるように構成されている。これにより、掘削装置による掘削断面と略合致した形状とすることができ、掘削後に地山1崩落防止のための埋め戻しが不要となる(モルタルが充填されていないものであると、隙間(凹状部6)があるため、崩落が生じる。)。   The first shield 3 is configured to have a substantially circular shape in cross-section by filling the concave portions 6 on the left and right side portions with mortar before being disposed in the first pit 2. Thereby, it can be set as the shape substantially matched with the excavation cross section by an excavator, and the backfilling for prevention of collapse of the natural ground 1 becomes unnecessary after excavation (If the mortar is not filled, a gap (concave shape) Since part 6) exists, collapse occurs.)

尚、実施例1において低強度部材とは、機械掘削可能な強度の部材を言う。具体的には強度250kg/cm程度以下の部材を採用するのが好ましいが、掘削速度を考慮するとより好ましくは強度200kg/cm程度のものを採用すると良い。 In the first embodiment, the low-strength member means a member having a strength capable of machine excavation. Specifically, a member having a strength of about 250 kg / cm 2 or less is preferably employed, but considering the excavation speed, a member having a strength of about 200 kg / cm 2 is more preferably employed.

また、低強度部材としては、モルタルに限らず、コンクリート,セメントミルク,セメントペースト,ソイルセメント,樹脂系材料,薬液注入材等、掘削性を著しく阻害するものでなく、壁体の構造や形成に支障がなければいずれを採用しても良い。更には、機械掘削可能なものであれば前記非金属に限らず金属であっても良いのは勿論である。   In addition, the low-strength members are not limited to mortar, but concrete, cement milk, cement paste, soil cement, resin-based materials, chemical injection materials, etc. do not significantly impede excavation, Any of them may be adopted as long as there is no problem. Furthermore, it is needless to say that not only the non-metal but also metal may be used as long as it can be machined.

また、前記第一管体7の内部は適宜な固化材としてのモルタル(上記他の低強度部材のいずれかを用いても良い。)で充填されている。従って、この点からも強度に秀れた構成となる。   Further, the inside of the first tubular body 7 is filled with mortar (any other low-strength member may be used) as an appropriate solidifying material. Therefore, from this point, the structure is excellent in strength.

第二遮蔽体5は、第一遮蔽体3より径小に設定された金属製の断面視略円形状の第二管体9(鋼管)であり、前記第一遮蔽体3の凹状部3bと略一致する外形状に設定されており、この第二遮蔽体5の側面の一部が前記凸状部5aに設定されている(第二遮蔽体5は断面視略円形状であるから、外周のどの部分でも前記第一遮蔽体3の凹状部3bと嵌合する凸状部5aとなる。)。従って、第二遮蔽体5としては市販の管体をそのまま利用できることになり、この点からも施工をコスト安に行えることになる。   The second shield 5 is a metal-made second tubular body 9 (steel pipe) having a substantially circular shape in sectional view, which is set to be smaller in diameter than the first shield 3, and the concave portion 3 b of the first shield 3. The outer shape is set to be substantially coincident, and a part of the side surface of the second shield 5 is set to the convex portion 5a (since the second shield 5 is substantially circular in cross section, Any part of the protrusions 5a is a convex part 5a that fits into the concave part 3b of the first shield 3). Therefore, a commercially available tube can be used as the second shield 5 as it is, and the construction can be performed at a low cost from this point.

また、前記第二管体9の内部は適宜な固化材としてのモルタル(上記他の低強度部材のいずれかを用いても良い。)で充填されている。尚、第二管体9としては金属製に限らずプラスチック製等、他の材質としても良い。   Further, the inside of the second tubular body 9 is filled with mortar (any of the other low-strength members may be used) as an appropriate solidifying material. The second tubular body 9 is not limited to metal but may be other materials such as plastic.

また、第一遮蔽体3及び第二遮蔽体5を第一坑2若しくは第二坑4に配設した後、この第一遮蔽体3の外周面と第一坑2との間及び第二遮蔽体5の外周面と第二坑4との間に、公知の裏込め注入装置を用いて裏込め注入材(モルタルや上記他の低強度部材のいずれか)を充填しても良い。この場合、更なる強度の向上を図れるのは勿論、湧水の漏出を一層確実に阻止できることになる。   Moreover, after arrange | positioning the 1st shield 3 and the 2nd shield 5 in the 1st mine 2 or the 2nd mine 4, between the outer peripheral surface of this 1st shield 3 and the 1st mine 2, and a 2nd shield Between the outer peripheral surface of the body 5 and the second mine 4, a backfill injection material (either mortar or the other low-strength member described above) may be filled using a known backfill injection device. In this case, not only can the strength be further improved, but also leakage of spring water can be more reliably prevented.

また、第一遮蔽体3及び第二遮蔽体5としては、第一管体7のように内部が中空のものに限らず、モルタル柱,コンクリート柱等を用いても良い。即ち、壁体は、中空の管体を並設して形成しても良いし、非中空の柱状体を並設して形成しても良い。   Moreover, as the 1st shielding body 3 and the 2nd shielding body 5, a mortar pillar, a concrete pillar, etc. may be used not only for a thing with a hollow inside like the 1st pipe body 7. FIG. That is, the wall body may be formed by juxtaposing hollow tube bodies, or may be formed by juxtaposing non-hollow columnar bodies.

尚、実施例1においては、立坑間に水平壁を形成してパイプルーフとする場合について説明したが、山岳トンネルの切羽前面に先行ルーフを形成するのにも用いることができる。また、鉛直壁を構成する場合として、立坑壁や止水壁(地下ダム、汚水等や廃棄物を貯めるための隔壁)も同様にして上記壁体を形成することが可能である。   In addition, although Example 1 demonstrated the case where a horizontal wall was formed between shafts and it was set as a pipe roof, it can be used also for forming a preceding roof in the front face of a mountain tunnel. Moreover, as a vertical wall, a vertical wall and a water barrier wall (underground dam, sewage, etc. and a partition wall for storing waste) can be formed in the same manner.

実施例1は上述のように構成したから、掘削装置により前記第一遮蔽体3の被掘削部3aを掘削しながら第二坑4を掘削し、この第二坑4に第二遮蔽体5を推進配設することで、この第二遮蔽体5の凸状部5aと前記第一遮蔽体3の凹状部3bとが嵌合し、第一遮蔽体3と第二遮蔽体5とは連結状態で並設されることになる。   Since the first embodiment is configured as described above, the second mine 4 is excavated while excavating the excavated portion 3a of the first shield 3 by the excavator, and the second shield 5 is provided in the second mine 4. Protruding and arranging the convex portion 5a of the second shield 5 and the concave portion 3b of the first shield 3 fit together, and the first shield 3 and the second shield 5 are connected. Will be installed side by side.

推進工法により第一遮蔽体3及び第二遮蔽体5を配設する場合、横坑を掘削した後、セグメントを組んで遮蔽体を作成する場合と異なり、施工速度が早く、また、セグメントの運搬設備が不要となる等、安価に施工可能となる。   When the first shield 3 and the second shield 5 are arranged by the propulsion method, the construction speed is high and the segment is transported unlike the case where the shield is formed by assembling the segments after excavating the horizontal shaft. Construction is possible at low cost, such as no equipment is required.

よって、所定間隔をおいて複数の第一坑2を掘削し、該第一坑2に第一遮蔽体3を配設した後、この第一遮蔽体3の被掘削部3aを掘削しながら第二坑4を掘削し、この第二坑4に第二遮蔽体5を配設するだけで、前記第一遮蔽体3と第二遮蔽体5とを連結状態で並設して所定の空間を囲むパイプルールを形成できることになり、地下水が多く含まれる滞水層や土圧・水圧などの外力が大きく作用する地山でもパイプルーフ工法を実現できることになる。   Therefore, after excavating a plurality of first wells 2 at a predetermined interval and disposing the first shield 3 in the first well 2, the first shield 2 is excavated while excavating the portion to be excavated 3a. By excavating the second mine 4 and arranging the second shield 5 in the second mine 4, the first shield 3 and the second shield 5 are connected in parallel to form a predetermined space. The surrounding pipe rule can be formed, and the pipe roof construction method can be realized even in the aquifer layer that contains a lot of groundwater and in the natural ground where external forces such as earth pressure and water pressure act greatly.

即ち、例えば、交差点の立体交差では地上で交差させるオーバーパスと地下で交差させるアンダーパスとがあり、アンダーパスを採用した場合、地上の交通の影響を小さくできる非開削で施工するのが一般的である。しかし、従来工法では止水や構造に難点があり、それを解消するのに費用がかかり、延長当たりのコストが非常に高くなってしまう。この点、実施例1の壁体(パイプルーフ)を閉じた形で施工して、地下水の浸入を防いだ後、開放型で施工すれば確実でしかもコストも低く抑えることが可能となる。   That is, for example, there are an overpass that intersects on the ground and an underpass that intersects underground in the three-dimensional intersection of the intersection, and when underpass is adopted, it is common to construct without digging that can reduce the influence of ground traffic It is. However, the conventional method has a problem in water stoppage and structure, and it costs money to solve it, and the cost per extension becomes very high. In this regard, if the wall body (pipe roof) of Example 1 is constructed in a closed form to prevent the ingress of groundwater and then constructed in an open type, it is possible to surely reduce the cost.

従って、実施例1は、第一遮蔽体に設けた被掘削部を掘削することで第二遮蔽体と嵌合する凹状部を形成することができ、従来のように側部に継手を突設する必要がなく、それだけ止水を良好に行えることになり、例えば地下水が多く含まれる滞水層や外力が大きく作用する地山にも容易に施工可能な極めて実用性に秀れた画期的なものとなる。   Therefore, Example 1 can form the concave part which fits with a 2nd shield by excavating the to-be-excavated part provided in the 1st shield, and jointly projects in the side part like the past. It is possible to stop the water well, and, for example, it is an epoch-making that has excellent practicality and can be easily constructed even in aquifers that contain a lot of groundwater and in natural grounds where external forces act greatly. It will be something.

本発明の具体的な実施例2について図5,6に基づいて説明する。   A second embodiment of the present invention will be described with reference to FIGS.

実施例2は、第一遮蔽体3及び第二遮蔽体5を、その全体を低強度部材(モルタル)で形成した一例である。この場合、第一遮蔽体3の側部のいずれの部分でも被掘削部3aに設定することが可能で、第一坑2内への配設を一層容易に行える。また、第一坑2の掘削位置の精度もよりラフに設定しても、第二坑4を掘削する掘削装置との干渉等が生ぜず、この点からも作業性に秀れたものとなる。   Example 2 is an example in which the first shield 3 and the second shield 5 are entirely formed of a low-strength member (mortar). In this case, any portion of the side portion of the first shield 3 can be set as the excavated portion 3a, and the arrangement in the first mine 2 can be performed more easily. Moreover, even if the accuracy of the excavation position of the first mine 2 is set to be rougher, interference with the excavator for excavating the second mine 4 does not occur, and from this point, the workability is excellent. .

また、実施例2においては、第一遮蔽体3及び第二遮蔽体5を略同一径に設定している。従って、同一の掘削装置を使用でき、それだけコスト安に施工可能となる。尚、第二遮蔽体5を第一遮蔽体3より径小とした場合、凹状部3bがそれだけ小さくなり、強度及び止水性に秀れた壁体を形成可能となる。この場合、継手としての止水と構造強度とを保つ範囲で第二遮蔽体5は径小とするのが好ましい。   In Example 2, the first shield 3 and the second shield 5 are set to have substantially the same diameter. Therefore, the same excavator can be used, and construction can be performed at a lower cost. When the diameter of the second shield 5 is smaller than that of the first shield 3, the concave portion 3b becomes smaller accordingly, and a wall body excellent in strength and water-stopping property can be formed. In this case, it is preferable that the second shield 5 has a small diameter within a range that keeps the water stop and the structural strength as a joint.

実施例2においては、横坑である第一坑2(若しくは第二坑4)に鞘管(図示省略)を推進し、続いて、該鞘管内に該鞘管と略同径の管材を配設し、続いて、この管材内部に充填材を充填し、続いて、前記鞘管を該鞘管を引き抜く際に形成される前記第一坑2若しくは前記第二坑4と前記管材との間の空隙部に充填材を充填しながら前記第一坑2(若しくは前記第二坑4)から引き抜くことで、前記第一遮蔽体3(若しくは前記第二遮蔽体5)を配設する。   In Example 2, a sheath pipe (not shown) is propelled to the first mine 2 (or the second mine 4) which is a horizontal pit, and subsequently, a pipe material having the same diameter as the sheath pipe is arranged in the sheath pipe. And then filling the inside of the pipe with a filler, and subsequently, forming the sheath pipe between the first mine 2 or the second mine 4 and the pipe material formed when the sheath pipe is pulled out. The first shield 3 (or the second shield 5) is disposed by pulling out the first well 2 (or the second well 4) while filling the gap portion with the filler.

具体的には、以下のようにして施工を行う。   Specifically, construction is performed as follows.

所定間隔で複数の第一坑2を地山に掘削しながら、該第一坑2に鞘管として利用する管体を推進工法で水平に設置し、発進立坑から到達立坑へ推進する。工法は、泥水工法等を現場の条件から選定する。   While excavating a plurality of the first mine 2 in the ground at a predetermined interval, a pipe body used as a sheath pipe is horizontally installed in the first mine 2 by a propulsion method, and is propelled from the starting pit to the reaching pit. For the construction method, the mud construction method, etc. will be selected based on the site conditions.

続いて、鞘管に管材であるモルタル管を配設し、該モルタル管内にH型鋼(図示省略)を挿入する。   Subsequently, a mortar pipe as a pipe material is disposed in the sheath pipe, and H-shaped steel (not shown) is inserted into the mortar pipe.

尚、モルタル管を形成するモルタルは、掘削装置により掘削が容易な配合、即ち、粗骨材や鉄筋等の補強材が入らない配合とすると良く、低強度を補うために樹脂などのファイバー等を混入するのが好ましい。また、モルタルの強度は、推進方向の継手が必要とする強度からは可能な限り高強度とすることが好ましい。しかし、機械掘削が可能な強度から250kg/cm程度以下とするのが好ましいが、掘削速度を考慮するとより好ましくは200kg/cm程度以下に設定するのが良い。また、推進するモルタル管同士の推進方向の接合は印籠継手を採用すると良い。 It should be noted that the mortar forming the mortar tube should have a composition that can be easily excavated by a drilling device, that is, a composition that does not contain reinforcing materials such as coarse aggregates and reinforcing bars. It is preferable to mix. The strength of the mortar is preferably as high as possible from the strength required by the joint in the propulsion direction. However, although it is preferable to set it to about 250 kg / cm < 2 > or less from the intensity | strength which can be machine-digged, it is good to set to about 200 kg / cm < 2 > or less more preferably in consideration of excavation speed. Moreover, it is good to employ a stamped joint for joining in the propulsion direction between the mortar tubes to be propelled.

また、H型鋼は立坑で挿入可能な長さで搬入してボルト等で接合する。このH型鋼は、モルタル管の中心に固定するためにスペーサーを取り付けながら挿入すると良い。また、H型鋼に限らず、I型鋼や鋼管や鉄筋としても良いし、入れなくても良い。   In addition, the H-shaped steel is carried in with a length that can be inserted by a shaft and joined with bolts or the like. This H-shaped steel may be inserted while attaching a spacer in order to fix it to the center of the mortar tube. Moreover, not only H-shaped steel but I-shaped steel, a steel pipe, a reinforcing bar may be used, or it may not be inserted.

続いて、両坑口を閉塞して裏込め注入管とエア抜き管を適当な延長ごとに配置してモルタル管内に充填材としてモルタルを充填してモルタル柱21とし、該モルタル柱21のテールボイドに裏込材22としてのモルタルを注入しながら、モルタル柱21が移動しないように立坑に固定した状態で鞘管を引き抜くことで、第一遮蔽体3が形成される(図5参照)。   Subsequently, both wellheads are closed, and backfilling injection pipes and air vent pipes are arranged at appropriate extensions, and the mortar pipe is filled with mortar as a filler to form a mortar column 21, and the back of the tail void of the mortar column 21 is backed up. While injecting the mortar as the insert 22, the first shield 3 is formed by pulling out the sheath tube in a state where the mortar column 21 is fixed to the shaft so as not to move (see FIG. 5).

尚、テールボイドへの地下水の流入を阻止するため、モルタル注入圧が地下水圧を上回るように管理するのが望ましい。また、裏込め注入管を鞘管内に配管すると施工は容易であるが、テールボイドが大きくなる。一方、裏込め注入管を鞘管外に配管すればテールボイドは小さくなるが、配管はモルタル管の上部若しくは下部(第一遮蔽体3と第二遮蔽体5の連結部位を避けた位置)にする必要がある。また、裏込め注入のモルタルが硬化前に変形する場合も考えられるが、これは急結性のグラウト材や可塑性のグラウト材を使用することで防ぐことができる。また、注入厚さを薄くすれば変形は無視できる程度となる。   In order to prevent the inflow of groundwater into the tail void, it is desirable to control the mortar injection pressure to exceed the groundwater pressure. In addition, when the backfilling pipe is piped into the sheath pipe, the construction is easy, but the tail void becomes large. On the other hand, if the backfilling pipe is piped outside the sheath pipe, the tail void is reduced, but the pipe is placed above or below the mortar pipe (a position avoiding the connecting portion between the first shield 3 and the second shield 5). There is a need. In addition, the back-filling mortar may be deformed before curing, but this can be prevented by using a quick setting grout material or a plastic grout material. Further, if the injection thickness is reduced, the deformation is negligible.

また、モルタル管内に充填するモルタルは、モルタル管と同程度の配合(強度)とするのが好ましい。   Moreover, it is preferable that the mortar filled in the mortar tube has the same blending (strength) as the mortar tube.

続いて、第一遮蔽体3の被掘削部3aを掘削するようにこの第一遮蔽体3間に第二坑4を掘削し、上記第一遮蔽体3と同様に第二坑4に第二遮蔽体5を配設することで、前記被掘削部3aが掘削されることで形成された凹状部3bと第二遮蔽体5の凸状部5aとが嵌合し、第一遮蔽体3と第二遮蔽体5とが連結されることになる(図6参照)。図中、符号23はモルタル管と該モルタル管内に注入されるモルタルとから成るモルタル柱、24は裏込め注入により注入された裏込材(ここではモルタル)である。   Subsequently, the second mine 4 is excavated between the first shields 3 so as to excavate the excavated portion 3 a of the first shield 3, and the second mine 4 is in the second mine 4 like the first shield 3. By arranging the shield 5, the concave portion 3 b formed by excavating the excavated portion 3 a and the convex portion 5 a of the second shield 5 are fitted, and the first shield 3 and The second shield 5 is connected (see FIG. 6). In the figure, reference numeral 23 is a mortar column composed of a mortar tube and mortar injected into the mortar tube, and 24 is a backing material (here, mortar) injected by backfill injection.

従って、第一遮蔽体3に第二遮蔽体5の一部が嵌合して第一遮蔽体3と第二遮蔽体5とが連結されるから、第一遮蔽体3と第二遮蔽体5との重合部分が厚くなり、それだけ浸水経路が長くなるため、止水性が向上する。また、継手としての第二遮蔽体5は、厚みがある分剛性が高く、第一遮蔽体3の凹状部3bに嵌合していて外力による抜け出しなどに抵抗力が生じ、それだけ強度が向上する。   Accordingly, a part of the second shield 5 is fitted to the first shield 3 and the first shield 3 and the second shield 5 are connected. The polymerization portion becomes thicker, and the water immersion path becomes longer accordingly, so that the water stoppage is improved. Further, the second shield 5 as a joint has a high rigidity because of its thickness, and is fitted to the concave portion 3b of the first shield 3 to generate a resistance force against an escape by an external force, and the strength is improved accordingly. .

尚、モルタル管は予め円柱状のもの(非中空のもの)を配設しても良い。また、第一遮蔽体3は、掘削されない中心部を鋼管やヒューム管等の高強度部材で構成し、その外側にモルタル等の低強度部材を貼り付ける構成としても良い。また、第二遮蔽体5は、切削しないためヒューム管等としても良い。   The mortar tube may be provided in advance with a cylindrical shape (non-hollow). Moreover, the 1st shield 3 is good also as a structure which comprises the high intensity | strength members, such as a steel pipe and a fume pipe | tube, and a low intensity | strength member, such as mortar, in the center part which is not excavated. Moreover, since the 2nd shielding body 5 is not cut, it is good also as a fume pipe | tube.

また、鞘管を用いることで、機械掘削可能な強度であっても容易に土中に配設できる。これにより、被掘削部3aを掘削して形成される凹状部3bに第二遮蔽体5の凸状部5aを配設することで止水が可能となる。H型鋼等の芯材を円形断面の中心に設置することで遮蔽体の強度を確保することが可能となる。   Further, by using a sheath tube, even a strength capable of machine excavation can be easily disposed in the soil. Thereby, water stop is attained by arrange | positioning the convex-shaped part 5a of the 2nd shielding body 5 to the concave-shaped part 3b formed by excavating the to-be-excavated part 3a. By installing a core material such as H-shaped steel at the center of the circular cross section, it is possible to ensure the strength of the shield.

また、モルタル管の強度を切削可能な低強度に抑えることで、ラップ部分(第一遮蔽体3の被掘削部3a)の掘削が容易となり、それだけ壁体の形成を簡易に行えることになる。   Further, by suppressing the strength of the mortar tube to a low level that can be cut, the lap portion (excavated portion 3a of the first shield 3) can be easily excavated, and the wall can be easily formed accordingly.

その余は実施例1と同様である。   The rest is the same as in Example 1.

実施例1の使用状態を示す概略説明断面図である。2 is a schematic explanatory cross-sectional view showing a use state of Example 1. FIG. 実施例1の使用状態を示す概略説明側面図である。2 is a schematic explanatory side view showing a use state of Example 1. FIG. 実施例1の施工工程を説明する概略説明断面図である。2 is a schematic explanatory cross-sectional view illustrating a construction process of Example 1. FIG. 実施例1の施工工程を説明する概略説明断面図である。2 is a schematic explanatory cross-sectional view illustrating a construction process of Example 1. FIG. 実施例2の施工工程を説明する概略説明断面図である。10 is a schematic explanatory sectional view for explaining a construction process of Example 2. FIG. 実施例2の施工工程を説明する概略説明断面図である。10 is a schematic explanatory sectional view for explaining a construction process of Example 2. FIG.

符号の説明Explanation of symbols

1 地山
2 第一坑
3 第一遮蔽体
3a 被掘削部
3b 凹状部
4 第二坑
5 第二遮蔽体
5a 凸状部
6 凹状部
7 第一管体
8 充填材
9 第二管体
DESCRIPTION OF SYMBOLS 1 Natural mountain 2 1st mine 3 1st shield 3a Excavated part 3b Concave part 4 2nd mine 5 2nd shield 5a Convex part 6 Concave part 7 1st pipe body 8 Filler 9 2nd pipe body

Claims (18)

地山に配設される柱状若しくは筒状の遮蔽体を複数連設状態で並設して成る壁体の形成方法であって、地山に所定間隔をおいて側部に被掘削部が設けられた第一遮蔽体を配設し、続いて、前記第一遮蔽体の被掘削部を掘削しながら該第一遮蔽体の間に第二遮蔽体を配設し、この第二遮蔽体と前記第一遮蔽体とを連設して壁体とすることを特徴とする壁体の形成方法。   A method of forming a wall body in which a plurality of columnar or cylindrical shields arranged in a natural ground are arranged side by side in a continuous state, and a drilled part is provided on a side of the natural ground at a predetermined interval. The second shield is disposed between the first shields while excavating the excavated portion of the first shield, and the second shield is disposed. A method of forming a wall body, wherein the first shield body is connected to form a wall body. 請求項1記載の壁体の形成方法において、前記被掘削部は複数であって対向状態に設けられていることを特徴とする壁体の形成方法。   The method for forming a wall according to claim 1, wherein a plurality of the excavated parts are provided in an opposing state. 請求項1,2いずれか1項に記載の壁体の形成方法において、前記第二遮蔽体には、前記被掘削部が掘削された際に形成される凹状部と嵌合する凸状部が形成されていることを特徴とする壁体の形成方法。   The method of forming a wall body according to any one of claims 1 and 2, wherein the second shield has a convex portion that fits into a concave portion that is formed when the excavated portion is excavated. A method for forming a wall body, wherein the wall body is formed. 請求項1〜3いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体は、前記地山に所定間隔をおいて掘削される第一坑に配設されるものであり、前記第二遮蔽体は、前記第一遮蔽体の間に掘削される第二坑に配設されるものであることを特徴とする壁体の形成方法。   The method of forming a wall body according to any one of claims 1 to 3, wherein the first shield is disposed in a first mine excavated at a predetermined interval in the ground. The method of forming a wall, wherein the second shield is disposed in a second pit excavated between the first shields. 請求項4記載の壁体の形成方法において、前記第一坑及び前記第二坑は横坑であることを特徴とする壁体の形成方法。   5. The method for forming a wall according to claim 4, wherein the first mine and the second mine are horizontal pits. 請求項4、5いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体と前記第一坑若しくは前記第二遮蔽体と前記第二坑は、夫々略同断面形状に設定されていることを特徴とする壁体の形成方法。   6. The method of forming a wall body according to claim 4, wherein the first shield and the first mine or the second shield and the second mine are each set to have substantially the same cross-sectional shape. A method of forming a wall body, characterized by comprising: 請求項4〜6いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体若しくは前記第二遮蔽体は、断面視略円形状であることを特徴とする壁体の形成方法。   The method for forming a wall according to any one of claims 4 to 6, wherein the first shield or the second shield has a substantially circular shape in a cross-sectional view. 請求項4〜7いずれか1項に記載の壁体の形成方法において、前記第一坑と該第一坑に配設された前記第一遮蔽体の外周面との間若しくは前記第二坑と該第二坑に配設された前記第二遮蔽体の外周面との間に、裏込め注入材を充填することを特徴とする壁体の形成方法。   The method for forming a wall body according to any one of claims 4 to 7, wherein the wall is between the first mine and an outer peripheral surface of the first shield disposed in the first mine, or the second mine. A method for forming a wall body, comprising filling a backfilling injection material between the outer peripheral surface of the second shield disposed in the second pit. 請求項1〜8いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体は、少なくとも被掘削部を含む一部が低強度部材で形成されていることを特徴とする壁体の形成方法。   The wall body forming method according to claim 1, wherein at least a part of the first shield including a portion to be excavated is formed of a low-strength member. Forming method. 請求項9記載の壁体の形成方法において、前記第一遮蔽体は、その全部が低強度部材で形成されていることを特徴とする壁体の形成方法。   10. The method for forming a wall according to claim 9, wherein the first shield is entirely formed of a low-strength member. 請求項1〜10いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体は、側部に凹状部が形成された第一管体の該凹状部に充填され前記被掘削部となる充填材が充填されたものであることを特徴とする壁体の形成方法。   The method of forming a wall body according to any one of claims 1 to 10, wherein the first shield is filled in the concave portion of the first tubular body having a concave portion formed on a side portion thereof. A method for forming a wall, which is filled with a filler. 請求項11記載の壁体の形成方法において、前記第一管体は鋼管であることを特徴とする壁体の形成方法。   12. The wall forming method according to claim 11, wherein the first pipe is a steel pipe. 請求項11,12いずれか1項に記載の壁体の形成方法において、前記第一管体の内部を固化材で充填することを特徴とする壁体の形成方法。   The method for forming a wall according to any one of claims 11 and 12, wherein the inside of the first tubular body is filled with a solidifying material. 請求項1〜13いずれか1項に記載の壁体の形成方法において、前記第二遮蔽体は、前記第一遮蔽体より小径であることを特徴とする壁体の形成方法。   The method for forming a wall according to claim 1, wherein the second shield is smaller in diameter than the first shield. 請求項1〜14いずれか1項に記載の壁体の形成方法において、前記第二遮蔽体は、第二管体から成ることを特徴とする壁体の形成方法。   The method of forming a wall body according to any one of claims 1 to 14, wherein the second shielding body comprises a second tubular body. 請求項15記載の壁体の形成方法において、前記第二管体は鋼管であることを特徴とする壁体の形成方法。   16. The method for forming a wall according to claim 15, wherein the second tubular body is a steel pipe. 請求項1〜16いずれか1項に記載の壁体の形成方法において、前記第一遮蔽体と前記第二遮蔽体とを連設して成る壁体は、囲繞状態の壁体であり、前記壁体形成後、該壁体の内方を掘削することを特徴とする壁体の形成方法。   The wall body forming method according to any one of claims 1 to 16, wherein the wall body formed by connecting the first shield body and the second shield body is a wall body in an enclosed state, A method of forming a wall body comprising excavating an inner side of the wall body after forming the wall body. 地山に並列に掘削された坑内に配設される遮蔽体を複数連設状態で並設して成る壁体であって、地山に所定間隔をおいて配設され側部に一対の凹状部が形成された鋼管から成る第一管体と、該第一管体間に配設され、前記第一管体の凹状部に夫々嵌合する一対の凸状部が形成された鋼管から成る第二管体とが複数連設されていることを特徴とする壁体。
A wall body formed by arranging a plurality of shields arranged in parallel in a pit excavated in parallel to a natural ground, and arranged in a predetermined interval on the natural ground and a pair of concave shapes on the side portion A first tubular body made of a steel pipe formed with a portion, and a steel pipe formed between the first tubular body and formed with a pair of convex portions that fit into the concave portions of the first tubular body, respectively. A wall body comprising a plurality of second pipe bodies connected in series.
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JP2013083047A (en) * 2011-10-06 2013-05-09 Kajima Corp Pipe roof and construction method of pipe roof
US8676022B2 (en) 2012-04-13 2014-03-18 Corning Cable Systems Llc Adapter for fiber optic connectors
CN111485893A (en) * 2019-10-10 2020-08-04 上海申通地铁集团有限公司 Earth excavation construction method for pipe curtain channel with oversized cross section in saturated soft soil area

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