JPH09177471A - Slip-down preventive wall structure of inclined shaft excavator - Google Patents
Slip-down preventive wall structure of inclined shaft excavatorInfo
- Publication number
- JPH09177471A JPH09177471A JP35250395A JP35250395A JPH09177471A JP H09177471 A JPH09177471 A JP H09177471A JP 35250395 A JP35250395 A JP 35250395A JP 35250395 A JP35250395 A JP 35250395A JP H09177471 A JPH09177471 A JP H09177471A
- Authority
- JP
- Japan
- Prior art keywords
- slip
- inclined shaft
- wall
- excavator
- wall surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は水力発電所の水圧管
路用斜坑等を掘削する斜坑掘削機において、掘削中にお
ける斜坑掘削機の滑落を防止する壁構造に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall structure for preventing an inclined shaft excavator from slipping down during excavation in an inclined shaft excavator for excavating a hydraulic shaft power line inclined shaft.
【０００２】[0002]
【従来の技術】従来から、山岳地盤に水力発電所の水圧
管路を形成するための斜坑を掘削するには、ＴＢＭ（ト
ンネルボーリングマシン）と称されている斜坑掘削機に
よって地盤の下方から上方に向かって地盤を掘削し、掘
削した土砂を斜坑の傾斜底面を通じて下方に搬出しなが
ら掘進することにより行われている。このような急勾配
の斜坑を斜坑掘削機によって掘削する場合、該斜坑掘削
機はその自重によって後退しようとし、掘削機の胴部に
設けたグリッパを掘削壁面に押接させても岩盤が軟岩層
の場合には強固な圧着力が得られず、滑落する虞れがあ
る。2. Description of the Related Art Conventionally, in order to excavate an inclined shaft for forming a hydraulic pipeline of a hydroelectric power plant in a mountain ground, an oblique shaft excavator called a TBM (tunnel boring machine) is used to excavate the ground from below. It is carried out by excavating the ground toward and excavating the excavated earth and sand while carrying it downward through the inclined bottom surface of the inclined shaft. When excavating such a steep inclined shaft with an inclined shaft excavator, the inclined shaft excavator tries to retract due to its own weight, and even if the gripper provided in the body of the excavator is pressed against the excavation wall surface, the rock mass is soft rock layer. In this case, a strong crimping force cannot be obtained, and there is a risk of slipping.
【０００３】このため、斜坑の掘削壁面に沿って湾曲し
たスキンプレートの四方縁辺に補強リブを一体に設けて
なるセグメントを斜坑掘削機によって掘削された斜坑壁
面に互いにボルトで連結しながらリング状に組み立て、
このセグメントと斜坑掘削壁面との間に裏込注入材とし
てのコンクリートを充填、硬化させることによって斜坑
掘削機の滑落防止壁を形成している。For this reason, segments formed by integrally providing reinforcing ribs on four sides of a skin plate curved along the excavated wall surface of the inclined shaft are connected to the inclined wall surface excavated by the inclined shaft excavator by bolts to form a ring shape. assembly,
By filling and hardening concrete as a backfill injection material between this segment and the slope excavation wall surface, the slip prevention wall of the slope excavator is formed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
ような滑落防止壁では、斜坑掘削機が滑落した場合にセ
グメントの前端面によって該斜坑掘削機の荷重を支持す
ることになるが、その支持力は主として斜坑掘削機の滑
落方向に平行なスキンプレートの面と裏込注入材との付
着力によって形成しているために、斜坑掘削機の荷重を
支えるのに充分な耐力を発揮することができないという
問題点がある。さらに、滑落防止壁の形成は、リング状
に組み立てたセグメントと斜坑掘削壁との間に裏込注入
材を充填、硬化させることによって行っているため、こ
の裏込注入材の硬化に時間がかかって斜坑の施工能率が
低下するという問題点があった。本発明はこのような問
題点を全面的に解消し得る斜坑掘削機の滑落防止構造を
提供するものである。However, in the anti-slip wall as described above, the load of the oblique excavator is supported by the front end face of the segment when the oblique excavator slides down. Is formed mainly by the adhesive force between the back-filling material and the surface of the skin plate parallel to the slide direction of the inclined shaft excavator, it is not possible to exert sufficient proof strength to support the load of the inclined shaft excavator. There is a problem. Furthermore, since the anti-slip wall is formed by filling and hardening the backfill injection material between the ring-shaped segment and the slope excavation wall, it takes time to cure this backfill injection material. Therefore, there was a problem that the construction efficiency of the inclined shaft decreased. The present invention provides a slip-prevention structure for an inclined shaft excavator that can completely eliminate such problems.
【０００５】[0005]
【課題を解決するための手段】本発明の斜坑掘削機の滑
落防止構造は、斜坑掘削機により掘削した斜坑掘削壁面
に、斜坑の周方向に湾曲した前後の円弧状リブ間を斜坑
の長さ方向に向けた数本の連結リブによって一体に枠組
みしてなる鋼製リブ枠を配設し、このリブ枠の空間部に
露出する斜坑掘削壁面にコンクリートを吹き付けて該吹
き付けコンクリート層と鋼製リブ枠とを一体化させるこ
とにより滑落防止壁を形成し、この滑落防止壁を斜坑掘
削機の掘進に従って斜坑の長さ方向に連続的に形成して
なるものである。According to the present invention, there is provided an anti-slip structure for a tilting shaft excavator, wherein a length of the tilting shaft is provided between front and rear arc-shaped ribs curved in the circumferential direction of the tilting shaft on a wall of the tilting shaft excavated by the tilting shaft excavator. A rib frame made of steel, which is integrally framed by several connecting ribs oriented in the direction, is arranged, and concrete is sprayed onto the excavated wall surface of the inclined shaft exposed in the space of the rib frame, and the sprayed concrete layer and steel rib An anti-slip wall is formed by integrating with the frame, and the anti-slip wall is continuously formed in the longitudinal direction of the inclined shaft as the inclined shaft excavator advances.
【０００６】上記の滑落防止構造は斜坑掘削壁面の全面
に亘って形成しておいてもよく、また、底面部のみに形
成し、この底面部以外の掘削壁面に吹き付けコンクリー
トによる斜坑覆工を形成しておいてもよい。さらに、斜
坑掘削地盤の底面部における底面部に最低部分を残して
上記滑落防止壁を形成し、該最低部分をずり排出シュー
トの配設空間部に使用してもよい。The above-mentioned slip-prevention structure may be formed over the entire surface of the excavated wall surface of the inclined shaft, or it may be formed only on the bottom surface, and the inclined shaft lining made of sprayed concrete is formed on the excavated wall surface other than this bottom surface portion. You may keep it. Further, the slip-prevention wall may be formed by leaving a bottom portion in the bottom portion of the bottom of the inclined shaft excavation ground, and the lowest portion may be used as a space for disposing the discharge chute.
【０００７】[0007]
【発明の実施の形態】鋼製リブ枠は、斜坑掘削壁面の周
方向に沿うように湾曲した一定幅（高さ）と長さを有す
る一対の円弧状リブを前後に配し、これらの円弧状リブ
の長さ方向の両端間と中間部の対向面間を該円弧状リブ
と同一幅を有する一定長さの連結リブによって一体に固
着することにより枠状に形成されている。この鋼製リブ
枠を斜坑掘削機によって掘削された斜坑掘削壁面の円周
方向にその円弧状リブを向けて沿わし、隣接するリブ枠
の連結リブ同士をボルトにより連結しながら組立てる。
このリブ枠を斜坑掘削壁面の全周に亘ってリング状に組
立てれば、斜坑掘削機の推進反力材として使用すること
ができるが、斜坑掘削機の滑落を防止するには斜坑掘削
壁面の底面部に施工すればよい。また、底面部にリブ枠
を施工する場合、該底面部の中央部、即ち、斜坑の最も
低い部分を残し、その最低部分の両側にリブ枠を施工し
てもよい。BEST MODE FOR CARRYING OUT THE INVENTION A steel rib frame is provided with a pair of arc-shaped ribs having a constant width (height) and a length curved along the circumferential direction of the wall surface of an excavated pit and arranged in front and back. The arc-shaped ribs are formed in a frame shape by integrally fixing both ends in the length direction and the facing surfaces of the intermediate portion by connecting ribs having a constant length and having the same width as the arc-shaped ribs. This steel rib frame is assembled along the arc-shaped ribs in the circumferential direction of the wall surface of the slope excavation excavated by the slope excavator, while connecting the connecting ribs of the adjacent rib frames with bolts.
If this rib frame is assembled in a ring shape over the entire circumference of the slope excavation wall, it can be used as a propulsion reaction material for the slope excavator, but to prevent the slope excavator from sliding down, It should be installed on the bottom part. When a rib frame is applied to the bottom surface, the rib frame may be applied to both sides of the lowest part of the bottom part, that is, the lowest part of the inclined shaft.
【０００８】次いで、このリブ枠の円弧状リブと連結リ
ブとで囲まれた空間部に露出する掘削壁面にコンクリー
トを吹き付けてリブ枠の厚みと同程度まで、即ち、リブ
枠が埋設する厚みのコンクリート層を設け、リブ枠と共
に滑落防止壁を形成する。吹き付けコンクリートは初期
強度が高いので、吹き付け施工直後から斜坑掘削機の滑
落防止壁としての作用を奏するものである。さらに、底
面部の最低部分を挟むようにしてその両側に形成した滑
落防止壁部間に鋼製繋ぎ材を架設して滑落防止壁間を固
定する。Then, concrete is sprayed onto the excavation wall surface exposed in the space surrounded by the arc-shaped ribs and the connecting ribs of the rib frame to a thickness almost equal to the thickness of the rib frame, that is, the thickness of the rib frame embedded. A concrete layer is provided to form the anti-slip wall with the rib frame. Since sprayed concrete has a high initial strength, it will act as a slip-prevention wall of an inclined shaft excavator immediately after spraying. Further, a steel connecting member is installed between the anti-slip walls formed on both sides of the bottom part so as to sandwich the lowest part, and the anti-slip walls are fixed to each other.
【０００９】この滑落防止壁は斜坑掘削機が一定長の斜
坑部分を掘削する毎に、斜坑の長さ方向に施工される。
また、底面部以外の斜坑掘削壁面に吹き付けコンクリー
トによる斜坑覆工を形成する。一方、斜坑の底面部にお
ける上記最低部分にはずり排出用シュートが配設され、
斜坑掘削機によって掘削された土砂をその傾斜面を利用
して下方に排出する。なお、滑落防止壁から斜坑掘削地
盤に向かってアンカーボルトを打ち込んでおいてもよ
く、このように滑落防止壁を固定すると、斜坑掘削機の
推進反力も充分に支持することができる。The slip-prevention wall is constructed in the lengthwise direction of the inclined shaft every time the inclined shaft excavator excavates a portion of the inclined shaft of a certain length.
In addition, a sloped lining of sprayed concrete will be formed on the sloped excavation wall surface other than the bottom part. On the other hand, a slip discharge chute is arranged at the lowest part of the bottom of the inclined shaft,
The earth and sand excavated by the inclined shaft excavator is discharged downward by using the inclined surface. An anchor bolt may be driven from the slip-prevention wall toward the excavation ground of the inclined shaft. By fixing the anti-slip wall in this manner, the propulsion reaction force of the oblique excavator can be sufficiently supported.
【００１０】[0010]
【実施例】本発明の具体的な実施例を図面について説明
すると、図１〜図３において、Ａは斜坑掘削機６（図６
に示す）の後方において、該斜坑掘削機６により掘削さ
れたトンネル掘削壁面３に形成される滑落防止壁で、掘
削壁面３に沿って円弧状に湾曲した長方形状の鋼製リブ
枠１と、掘削壁面３に一体に付着した吹き付けコンクリ
ート層２とから構成している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described with reference to the drawings. In FIGS.
(Shown in FIG. 2), a rectangular steel rib frame 1 curved in an arc shape along the excavation wall surface 3 is a slip-prevention wall formed on the tunnel excavation wall surface 3 excavated by the inclined shaft excavator 6, and It is composed of the sprayed concrete layer 2 integrally attached to the excavated wall surface 3.
【００１１】上記リブ枠１は、図４に示すように、一定
長さと幅とを有する帯鋼板をその幅方向に掘削壁面３の
円周方向の面と同一湾曲度でもって円弧状に湾曲させて
なるリブ1a、1aを、幅方向に起立させた状態で前後に一
定の間隔を存して対設し、この円弧状リブ1a、1aの両端
に該リブ1aと同一幅を有し且つリブ1aよりも短い長さの
細長長方形状の連結リブ1b、1bの長さ方向の前後端を溶
接によって一体に固着すると共に、前後円弧状リブ1a、
1aの長さ方向の中間部間を連結リブ1cと同一形状の補強
用連結リブ1c、1cで一体に連結してなる構造を有してい
る。As shown in FIG. 4, the rib frame 1 is formed by bending a strip steel plate having a constant length and width in an arc shape in the width direction thereof with the same degree of curvature as the circumferential surface of the excavation wall surface 3. The ribs 1a, 1a are formed opposite to each other with a certain interval in the front and rear in a state of standing in the width direction, and the ribs 1a, 1a have the same width as the rib 1a at both ends and The elongated rectangular connecting rib 1b having a length shorter than 1a, the front and rear ends in the longitudinal direction of 1b are integrally fixed by welding, and the front and rear arc-shaped ribs 1a,
It has a structure in which intermediate portions in the length direction of 1a are integrally connected by reinforcing connecting ribs 1c, 1c having the same shape as the connecting rib 1c.
【００１２】従って、このリブ枠１は従来の鋼セグメン
トの主要形成部材であるスキンプレートは備えてなく、
円弧状リブ1aと連結リブ1b、1cとによって囲まれた空間
部1dは内外方向に貫通した構造となっている。リブ枠１
の前後円弧状リブ1a、1aと両端側の連結リブ1b、1bには
長さ方向に一定間隔毎にボルト孔４を設けている。５は
補強用連結リブ1cの中央部に固着した連結板で、ボルト
取付孔5aを穿設している。Therefore, the rib frame 1 does not have the skin plate which is the main forming member of the conventional steel segment.
The space 1d surrounded by the arc-shaped rib 1a and the connecting ribs 1b and 1c has a structure penetrating inward and outward. Rib frame 1
The front and rear arc-shaped ribs 1a, 1a and the connecting ribs 1b, 1b on both ends are provided with bolt holes 4 at regular intervals in the length direction. Reference numeral 5 is a connecting plate fixed to the central portion of the reinforcing connecting rib 1c, and has bolt mounting holes 5a formed therein.
【００１３】斜坑掘削機６は、図５に示すように円筒形
状の前胴部6aと後胴部6bを直列に接続してなり、前胴部
6a内にカッター板７の回転駆動機構８を配設していると
共に前胴部6aと後胴部6bとの複数個所間をスラストジャ
ッキ９により連結している。又、前胴部6aと後胴部6bと
の周壁には、周方向に適宜間隔毎に油圧シリンダ（図示
せず）の作動によって胴内から斜坑掘削壁面３に向かっ
て出没するフロントグリッパ10とメイングリッパ11をそ
れぞれ配設している。12は後胴部6bの内周面四方に配
設、固定した滑落防止ジャッキで、そのロッド端に装着
しているスプレッダ13を上記滑落防止壁Ａの前端面に当
接、受止させるようにしている。なお、この滑落防止ジ
ャッキ12は地盤が悪くてメイングリッパ11によって推力
の支持が得られない時には推進ジャッキとして使用す
る。23はカッタ板７で掘削したずりを斜坑掘削機６の後
方に導く案内シュートである。As shown in FIG. 5, the inclined shaft excavator 6 has a cylindrical front body portion 6a and a rear body portion 6b connected in series.
A rotary drive mechanism 8 for the cutter plate 7 is provided in the 6a, and a plurality of positions of the front body portion 6a and the rear body portion 6b are connected by thrust jacks 9. Further, on the peripheral walls of the front body portion 6a and the rear body portion 6b, a front gripper 10 protruding and retracting from the inside of the body toward the slope excavation wall surface 3 by the operation of a hydraulic cylinder (not shown) at appropriate intervals in the circumferential direction. Main grippers 11 are provided respectively. Reference numeral 12 is a slip prevention jack arranged and fixed on four sides of the inner peripheral surface of the rear body portion 6b so that the spreader 13 attached to the rod end thereof is brought into contact with and received by the front end surface of the slip prevention wall A. ing. The slip-prevention jack 12 is used as a propulsion jack when the ground is poor and thrust cannot be supported by the main gripper 11. Reference numeral 23 is a guide chute that guides the shear excavated by the cutter plate 7 to the rear of the inclined shaft excavator 6.
【００１４】このように構成した斜坑掘削機６によって
硬質岩盤層からなる山岳地盤に斜坑14を掘削しながら、
その後方の掘削壁面３に滑落防止壁Ａを施工する。この
滑落防止壁Ａの施工方法は、掘削壁面３の底面部におい
て、その底面中央部、即ち、最も低い底面部分3aをずり
排出シュート15の配設幅だけ残して該最低部3aの両側底
面部に鋼製リブ枠１の円弧状リブ1aを掘削壁面３の周方
向に向けて該鋼製リブ枠１の湾曲外面側（凸弧面側）を
接するように配設したのち、この両側のリブ枠１、１の
連結板５、５間に鋼製繋ぎ材16を架設し、該繋ぎ材16の
両端を連結板５、５にボルトにより固着する。なお、繋
ぎ材16の架設は、滑落防止壁Ａを施工したのち行っても
よい。この繋ぎ材16は、掘削施工に必要な資材、機材を
運搬する台車の走行用レールの枕木として使用する。While excavating the inclined shaft 14 on the mountain ground composed of hard rock layers by the inclined shaft excavator 6 thus constructed,
The slip-prevention wall A is constructed on the excavated wall surface 3 behind. The construction method of the slip-prevention wall A is as follows. In the bottom surface portion of the excavation wall surface 3, the bottom surface center portion, that is, the lowest bottom surface portion 3a is left by the width of the displacement chute 15 and both bottom surface portions of the bottom portion 3a. After the arc-shaped ribs 1a of the steel rib frame 1 are arranged in the circumferential direction of the excavation wall surface 3 so that the curved outer surface side (convex arc surface side) of the steel rib frame 1 is in contact, the ribs on both sides Steel connecting members 16 are installed between the connecting plates 5 and 5 of the frames 1 and 1, and both ends of the connecting members 16 are fixed to the connecting plates 5 and 5 with bolts. The erection of the connecting member 16 may be performed after the slip-prevention wall A is constructed. This connecting material 16 is used as a sleeper for a traveling rail of a truck for carrying materials and equipment necessary for excavation work.
【００１５】しかるのち、リブ枠１の枠内空間部1dに露
出する掘削壁面３にコンクリートを吹き付ける。この吹
き付けコンクリートはリブ枠１の円弧状リブ1aと両端連
結リブ1b、1bとで囲まれた空間部1dが吹き付けコンクリ
ート層２によって充満するまで行う。従って、掘削壁面
３に付着した吹き付けコンクリート層２内にリブ枠１の
補強用リブ1cが埋設状態になり、リブ枠１と吹き付けコ
ンクリート層２及び掘削壁面３とが強固に一体化した滑
落防止壁Ａが形成される。さらに、吹き付けコンクリー
トは初期強度が高いため、施工直後より滑落防止壁とし
ての役目を発揮することができる。After that, concrete is sprayed onto the excavated wall surface 3 exposed in the frame inner space portion 1d of the rib frame 1. This spraying concrete is performed until the space portion 1d surrounded by the arc-shaped rib 1a of the rib frame 1 and the both end connecting ribs 1b, 1b is filled with the spraying concrete layer 2. Therefore, the reinforcing ribs 1c of the rib frame 1 are embedded in the sprayed concrete layer 2 attached to the excavated wall surface 3, and the slide frame is firmly integrated with the rib frame 1 and the sprayed concrete layer 2 and the excavated wall surface 3. A is formed. Further, since the sprayed concrete has a high initial strength, it can serve as a slip-prevention wall immediately after construction.
【００１６】滑落防止壁Ａは、必要に応じてそのコンク
リート層２から図１に示すように、アンカーボルト17を
掘削壁面３に打ち込むことにより固定しておけば、一層
強力な滑落防止壁３を形成することができる。なお、掘
削壁面３に対するアンカーボルト17の打ち込みは、吹き
付けコンクリート層２の形成前にリブ枠１の空間部1dを
通して行い、その頭部を空間部1d内に露出させたおいた
のち、コンクリートの吹き付けによってコンクリート層
２内に埋設させ、コンクリート層２から斜坑14内に突出
する頭部にボルトを螺締させてもよい。The slip-prevention wall A can be made stronger if the anchor bolts 17 are fixed to the excavation wall surface 3 from the concrete layer 2 as shown in FIG. Can be formed. The anchor bolts 17 are driven into the excavated wall surface 3 through the space 1d of the rib frame 1 before forming the sprayed concrete layer 2, and the head is exposed in the space 1d, and then the concrete is sprayed. It may be embedded in the concrete layer 2 by means of the above, and bolts may be screwed to the head portion projecting from the concrete layer 2 into the inclined shaft 14.
【００１７】さらに、滑落防止壁Ａの施工個所以外の斜
坑掘削壁面３の内面にもコンクリートを吹き付けて滑落
防止壁Ａのコンクリート層２と略同一厚みの覆工コンク
リート21を施工する。斜坑掘削機６が滑落した場合、最
も大きな支持力を必要とするのは斜坑14の底面側である
から、その底面部に上記のように滑落防止壁Ａを設けて
おき、その他の部分は滑落防止壁を設けなくても覆工コ
ンクリート21で充分な支持力が得られる。しかしなが
ら、地盤が崩壊性である場合のように必要に応じて滑落
防止壁Ａを斜坑掘削壁面３の全周に亘って連続的に施工
しておいてもよく、また、二個以上のリブ枠１を掘削壁
面３の周方向に連結してその枠内空間部1dに吹き付けコ
ンクリート層２を設けることにより所望円弧長の連続し
た滑落防止壁Ａを形成してもよい。リブ枠１、１同士の
連結は、その対向する連結リブ1b、1bを密接させてボル
ト孔４、４間をボルトで連結、固着することにより行
う。Further, concrete is also sprayed on the inner surface of the sloped excavation wall surface 3 other than the construction site of the slip-prevention wall A to construct the lining concrete 21 having substantially the same thickness as the concrete layer 2 of the slip-prevention wall A. When the inclined shaft excavator 6 slides down, it is the bottom side of the inclined shaft 14 that needs the largest supporting force, so the slide prevention wall A is provided on the bottom surface as described above, and the other portions slide down. Sufficient supporting force can be obtained with the lining concrete 21 without providing the prevention wall. However, as in the case where the ground is collapsible, the slip-prevention wall A may be continuously constructed over the entire circumference of the sloped excavation wall surface 3 if necessary, and two or more rib frames are provided. A continuous slip-prevention wall A having a desired arc length may be formed by connecting 1 in the circumferential direction of the excavated wall surface 3 and providing the concrete layer 2 on the space 1d in the frame. The rib frames 1 and 1 are connected to each other by bringing the connecting ribs 1b and 1b facing each other into close contact with each other and connecting and fixing the bolt holes 4 and 4 with bolts.
【００１８】また、掘削壁面３の最低部分3aに斜坑掘削
機６のカッター板７によって掘削され、案内シュート23
を通じて斜坑掘削機６の後端まで導出されたずりの排出
シュート15を敷設し、この排出シュート15の傾斜面上を
通じて掘削ずりを作業坑18（図６に示す）まで落下、排
出させるようにする。なお、図７に示すように、掘削壁
面３の最低部分3aにも滑落防止壁Ａを施工しておき、排
出シュート15はこの滑落防止壁Ａの最低部分の斜坑内面
上に敷設するように構成してもよい。Further, the guide chute 23 is excavated by the cutter plate 7 of the inclined shaft excavator 6 on the lowest portion 3a of the excavation wall surface 3.
A sloping discharge chute 15 that has been led out to the rear end of the inclined shaft excavator 6 is laid through the sloping shaft, and the excavation slide is dropped and discharged to the work shaft 18 (shown in FIG. 6) through the inclined surface of the discharging chute 15. . As shown in FIG. 7, a slip prevention wall A is also constructed on the lowest portion 3a of the excavation wall surface 3, and the discharge chute 15 is laid on the inner surface of the inclined shaft at the lowest portion of the slip prevention wall A. You may.
【００１９】滑落防止壁Ａや覆工コンクリート21、ずり
排出シュート15、繋ぎ材16などは、斜坑掘削機６によっ
て一定長の斜坑14が掘削される毎にその斜坑14の長さ方
向に連続して施工される。即ち、既に施工した滑落防止
壁Ａにおけるリブ枠１の前側円弧状リブ1aの露出前面に
次のリブ枠１の後側円弧状リブ1aの後面を接合してボル
ト孔４、４間をボルトで連結することにより一体的に固
着したのち、該リブ枠１の枠内空間部1dに上記同様にし
て吹き付けコンクリート層２を設けることにより滑落防
止壁Ａを形成すると共に滑落防止壁Ａを設けない掘削壁
面３の内面に覆工コンクリート21を吹き付け施工する。
さらに、繋ぎ材16、16・・・上にレール19を敷設し、こ
のレール19上を斜坑掘削機６の後端に連結した後続台車
20を走行させて斜坑14内に敷設する水圧管22を該後続台
車20によって搬送させるようにする。The slip-prevention wall A, the lining concrete 21, the shear discharge chute 15, the connecting material 16, etc. are continuously formed in the longitudinal direction of the inclined shaft 14 every time the inclined shaft 14 is excavated by the inclined shaft excavator 6. Be constructed. That is, the rear surface of the rear-side arc-shaped rib 1a of the next rib frame 1 is joined to the exposed front surface of the front-side arc-shaped rib 1a of the rib frame 1 on the slip-prevention wall A that has already been installed, and bolts are used between the bolt holes 4, 4. After they are integrally fixed by connecting, the blasting concrete layer 2 is formed in the frame inner space portion 1d of the rib frame 1 in the same manner as above to form the slip-prevention wall A and the excavation wall A is not provided. The lining concrete 21 is sprayed on the inner surface of the wall surface 3.
Further, a trailing truck in which a rail 19 is laid on the connecting members 16, 16 ... And the rail 19 is connected to the rear end of the excavator 6
The penstock 20 is run so that the penstock 22 laid in the inclined shaft 14 is conveyed by the trailing carriage 20.
【００２０】斜坑掘削機６によって斜坑14を掘削するに
は、スラストジャッキ９及び滑落防止ジャッキ12のロッ
ドを収縮させると共に、メイングリッパ11を掘削壁面３
に圧着させて斜坑掘削機６を支持させる一方、フロント
グリッパ10を前胴部6a内に没入させ、且つ滑落防止ジャ
ッキ12のスプレッダ13を後方の滑落防止壁Ａの前側円弧
状リブ1aの前面に当接させて斜坑掘削機６の滑落を防止
した状態とし、この状態からカッター板７を回転させな
がらスラストジャッキ９を伸長させることにより、後胴
部6bに対して前胴部6aを前進させて斜坑14の掘削を行
う。To excavate the inclined shaft 14 with the inclined shaft excavator 6, the rods of the thrust jack 9 and the slip-prevention jack 12 are contracted, and the main gripper 11 is excavated on the wall surface 3.
While supporting the inclined shaft excavator 6 by crimping it to the front, the front gripper 10 is immersed in the front body portion 6a, and the spreader 13 of the anti-slip jack 12 is attached to the front of the front arc-shaped rib 1a of the rear anti-slip wall A. The slant shaft excavator 6 is brought into contact with the slant shaft excavator 6 to prevent it from sliding down, and the thrust jack 9 is extended while rotating the cutter plate 7 from this state, thereby advancing the front trunk portion 6a with respect to the rear trunk portion 6b. Excavate the inclined shaft 14.
【００２１】一定長の斜坑14を掘削すると、フロントグ
リッパ10を前胴部6aから突出させて斜坑掘削壁面３に圧
着させることにより斜坑掘削機６を掘削壁面３に支持さ
せたのち、メイングリッパ11を後退させて掘削壁面３か
ら離間させ、しかるのち、スラストジャッキ９を収縮さ
せながらその収縮量に応じて滑落防止ジャッキ12を伸長
させ、スプレッダ13を常時滑落防止壁Ａに当接させた状
態にして滑落を防止しながら後胴部6bを一定長前進させ
る。When excavating the inclined shaft 14 of a certain length, the front gripper 10 is projected from the front body portion 6a and pressed against the inclined shaft excavation wall surface 3 to support the inclined shaft excavator 6 on the excavation wall surface 3, and then the main gripper 11 is pressed. Is retracted and separated from the excavation wall surface 3, and thereafter, the slide jack 9 is contracted while the thrust jack 9 is contracted, and the slip prevention jack 12 is extended according to the contraction amount so that the spreader 13 is always in contact with the slip prevention wall A. The rear torso 6b is moved forward by a certain length while preventing sliding.
【００２２】次いで、メイングリッパ11を掘削壁面３に
圧着させると共にスラストジャッキ９及び滑落防止ジャ
ッキ12のロッドを収縮させて斜坑掘削機６の後方に次の
滑落防止壁Ａの施工可能な空間部を設けたのち、この空
間部に上記のようにして滑落防止壁Ａや覆工コンクリー
ト21、ずり排出シュート15、繋ぎ材16、レール19等を施
工する。しかるのち、再び、斜坑掘削機６によって上記
同様に一定長の斜坑14を掘進し、その後方の掘削壁面３
に滑落防止壁Ａ等を施工し、この作業を繰り返し行って
水圧管を敷設した斜坑を築造するものである。Next, the main gripper 11 is crimped to the excavation wall surface 3 and the rods of the thrust jack 9 and the slip-prevention jack 12 are contracted so that a space portion where the next slip-prevention wall A can be constructed is provided behind the oblique excavator 6. After being provided, the slip prevention wall A, the lining concrete 21, the shear discharge chute 15, the connecting member 16, the rail 19 and the like are constructed in this space as described above. After that, the inclined shaft excavator 6 again excavates the inclined shaft 14 of a constant length in the same manner as described above, and the excavated wall surface 3 behind it is excavated.
The anti-slip wall A and the like are constructed on this, and this work is repeated to construct the inclined shaft with the penstock.
【００２３】[0023]
【発明の効果】以上のように本発明の斜坑掘削機の滑落
防止壁構造によれば、斜坑掘削機により掘削した斜坑掘
削壁面に、斜坑の周方向に湾曲した前後の円弧状リブ間
を斜坑の長さ方向に向けた数本の連結リブによって一体
に枠組みしてなる鋼製リブ枠を配設し、このリブ枠の空
間部に露出する斜坑掘削壁面にコンクリートを吹き付け
てリブ枠の空間部内にリブ枠と一体化した吹き付けコン
クリート層を形成してなるものであるから、吹き付けコ
ンクリートは初期強度が高いので、吹き付け施工直後か
ら斜坑掘削機の滑落防止壁として使用することができ、
斜坑掘削機による掘削作業が円滑且つ能率よく行えて工
期の短縮を図ることができるものである。As described above, according to the slip-prevention wall structure of the slant shaft excavator of the present invention, the slant shaft excavation wall excavated by the slant shaft excavator has a slant shaft between front and rear arc-shaped ribs curved in the circumferential direction of the slant shaft. In the space of the rib frame, a steel rib frame, which is integrally framed by several connecting ribs in the length direction of the rib frame, is placed, and concrete is sprayed onto the sloped excavation wall surface exposed in the space of the rib frame. Since it is formed by forming a sprayed concrete layer integrated with the rib frame, the sprayed concrete has a high initial strength, so it can be used as a slip-prevention wall of an inclined shaft excavator immediately after spraying.
The excavation work by the inclined shaft excavator can be performed smoothly and efficiently, and the construction period can be shortened.
【００２４】さらに、掘削壁面に強固に付着一体化した
吹き付けコンクリート層は、リブ枠内に充填されてリブ
枠のリブとも一体化しているので、リブ枠の剛性、圧縮
耐力が極めて大きくなり、このリブ枠内のコンクリート
層を介して該コンクリート層が付着している掘削壁面に
斜坑掘削機の荷重を確実に受止させることができるもの
である。また、この滑落防止壁を掘削壁面の全周に亘っ
て施工しておくことにより、不良地盤の場合には斜坑掘
削機の反力受止材としても利用することができる。Furthermore, since the sprayed concrete layer firmly adhered and integrated to the excavated wall surface is filled in the rib frame and integrated with the ribs of the rib frame, the rigidity and compression strength of the rib frame become extremely large. The load of the inclined shaft excavator can be reliably received on the excavation wall surface to which the concrete layer is attached via the concrete layer in the rib frame. Further, by constructing this slip-prevention wall over the entire circumference of the excavation wall surface, it can be used as a reaction force receiving material of the inclined shaft excavator in the case of defective ground.
【図１】滑落防止壁を施工した斜坑の簡略縦断正面図、FIG. 1 is a simplified vertical sectional front view of an inclined shaft constructed with a slip-prevention wall,
【図２】その滑落防止壁部分の縦断正面図、FIG. 2 is a vertical sectional front view of the slip-prevention wall portion,
【図３】その縦断側面図、FIG. 3 is a longitudinal side view thereof,
【図４】リブ枠の簡略斜視図、FIG. 4 is a simplified perspective view of a rib frame,
【図５】斜坑掘削機の簡略縦断側面図、[Fig. 5] Simplified vertical side view of an inclined shaft excavator,
【図６】斜坑を掘削している状態の簡略縦断側面図、FIG. 6 is a simplified vertical cross-sectional side view showing a state in which an inclined shaft is being excavated,
【図７】本発明の別な構造の滑落防止壁を施工した斜坑
の簡略縦断正面図。FIG. 7 is a simplified vertical sectional front view of an inclined shaft provided with a slip-prevention wall having another structure of the present invention.
Ａ 滑落防止壁 １ 鋼製リブ枠 1a 円弧状リブ 1b 連結リブ 1d 空間部 ２ 吹き付けコンクリート層 ３ 掘削壁面 ６ 斜坑掘削機 14 斜坑 A Anti-slip wall 1 Steel rib frame 1a Arc-shaped rib 1b Connection rib 1d Space part 2 Sprayed concrete layer 3 Excavation wall surface 6 Inclined excavator 14 Inclined shaft
Claims (6)
に、斜坑の周方向に湾曲した前後の円弧状リブ間を斜坑
の長さ方向に向けた数本の連結リブによって一体に枠組
みしてなる鋼製リブ枠を配設し、このリブ枠の空間部に
露出する斜坑掘削壁面にコンクリートを吹き付けてリブ
枠の空間部内にリブ枠と一体化した吹き付けコンクリー
ト層を形成してなることを特徴とする斜坑掘削機の滑落
防止壁構造。1. An inclined digging wall surface excavated by an inclined shaft excavator is integrally framed by several connecting ribs extending in the longitudinal direction of the inclined shaft between front and rear arc-shaped ribs curved in the circumferential direction of the inclined shaft. A steel rib frame is provided, and concrete is sprayed onto the sloped excavation wall surface exposed in the space of the rib frame to form a sprayed concrete layer integrated with the rib frame in the space of the rib frame. Anti-slip wall structure for inclined shaft excavator.
に形成すると共にこの底面部以外の斜坑掘削壁面に吹き
付けコンクリートによる斜坑覆工を形成していることを
特徴とする請求項１記載の斜坑掘削機の滑落防止壁構
造。2. The anti-slip wall is formed on the bottom surface of the slope excavation wall surface, and a slope lining made of sprayed concrete is formed on the slope excavation wall surface other than this bottom surface portion. Anti-slip wall structure for inclined shaft excavator.
形成していることを特徴とする請求項１記載の斜坑掘削
機の滑落防止壁構造。3. The anti-slip wall structure for an oblique excavator according to claim 1, wherein the anti-slip wall is formed on the entire surface of the excavated wall surface of the inclined shaft.
最低部分を残して上記滑落防止壁を形成し、該最低部分
にずり排出シュートを配設したことを特徴とする請求項
１または請求項２に記載の斜坑掘削機の滑落防止壁構
造。4. The slip prevention chute is provided in the bottom part of the bottom part of the slope excavation ground, the bottom part of the bottom part of the bottom part of the slope excavation ground is formed, and the shear discharge chute is arranged in the bottom part. The slip-prevention wall structure of the inclined shaft excavator according to 2.
製繋ぎ材を架設して滑落防止壁間を一体に連結している
ことを特徴とする請求項１または請求項４記載の斜坑掘
削機の滑落防止壁構造。5. The inclined shaft excavation according to claim 1 or 4, wherein a steel connecting member is installed between the anti-slip walls on both sides of the discharge chute to integrally connect the anti-slip walls. Wall structure to prevent slipping of the machine.
アンカーボルトを打ち込んで滑落防止壁を固定している
ことを特徴とする請求項１ないし請求項５のうち、いず
れか１項に記載の斜坑掘削機の滑落防止壁構造。6. The slip-prevention wall is fixed by driving an anchor bolt from the slip-prevention wall toward the excavated ground of the inclined shaft to fix the slip-prevention wall. Anti-slip wall structure for inclined shaft excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35250395A JP3162990B2 (en) | 1995-12-27 | 1995-12-27 | Slope prevention wall structure for shaft excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35250395A JP3162990B2 (en) | 1995-12-27 | 1995-12-27 | Slope prevention wall structure for shaft excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09177471A true JPH09177471A (en) | 1997-07-08 |
| JP3162990B2 JP3162990B2 (en) | 2001-05-08 |
Family
ID=18424518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35250395A Expired - Fee Related JP3162990B2 (en) | 1995-12-27 | 1995-12-27 | Slope prevention wall structure for shaft excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3162990B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006804A (en) * | 2021-03-19 | 2021-06-22 | 中铁工程装备集团有限公司 | Driving method and structure of inclined shaft system line |
-
1995
- 1995-12-27 JP JP35250395A patent/JP3162990B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006804A (en) * | 2021-03-19 | 2021-06-22 | 中铁工程装备集团有限公司 | Driving method and structure of inclined shaft system line |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3162990B2 (en) | 2001-05-08 |
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