JPH0681879B2 - Construction method of underground structure - Google Patents
Construction method of underground structureInfo
- Publication number
- JPH0681879B2 JPH0681879B2 JP9396589A JP9396589A JPH0681879B2 JP H0681879 B2 JPH0681879 B2 JP H0681879B2 JP 9396589 A JP9396589 A JP 9396589A JP 9396589 A JP9396589 A JP 9396589A JP H0681879 B2 JPH0681879 B2 JP H0681879B2
- Authority
- JP
- Japan
- Prior art keywords
- underground structure
- pit
- ground
- roof
- friction cutter
- 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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、鉄道、道路等の下部地中に大幅員の地下構造
物を横断方向に掘進建設する際に上部交通に支障を与え
ることなく施工することができる地下構造物の施工法に
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention does not hinder upper traffic when excavating a large number of underground structures in the lower ground such as railways and roads in a transverse direction. The present invention relates to a method of constructing an underground structure that can be constructed.
鉄道、道路等の下部地中に大幅員の地下構造物を横断方
向に掘進させるには、上部交通を支承するための防護工
が必要となり、鋼管等を水平に並列させるパイプルーフ
を設けることなどが挙げられる。In order to excavate a large number of underground structures in the lower ground such as railroads and roads in the transverse direction, protective work is required to support upper traffic, and a pipe roof that horizontally arranges steel pipes and the like is provided. Is mentioned.
しかし、先に別工事としてパイプルーフを形成し、その
中を掘削して地下構造物を構築したり、また地下構造物
をパイプルーフ下を掘進させるようにしたのでは、この
パイプルーフが存在する分だけ土被りが厚くなる。しか
も、パイプルーフ施工の防護工が地下構造物埋設の本工
事と別工事となり、工費、工期が大である。However, if a pipe roof was formed as a separate work and an underground structure was constructed by excavating the pipe roof, or an underground structure was dug under the pipe roof, this pipe roof exists. The soil cover becomes thicker. Moreover, the protection work for pipe roof construction is different from the main construction for burying underground structures, and the construction cost and construction period are large.
そこで、発明者等は第6図〜第8図に示すような地下構
造物の施工法を発明し、先に特願昭53−89948号(特開
昭55−19312号)などとして出願した。Therefore, the inventors of the present invention invented a method for constructing an underground structure as shown in FIGS. 6 to 8, and filed an application as Japanese Patent Application No. 53-89948 (Japanese Patent Application Laid-Open No. 55-19312).
この前記第6図〜第8図に示す地下構造物の施工法は、
地中に掘進させる地下構造物の防護工を前もって施工す
ることなく、地下構造物の掘進と同時に行うので安全か
つ確実に、しかも安価に工事ができ、また土被りも浅く
施工できるものであるが、まずその内容を説明し、よっ
て本発明の目的を明らかにする。The construction method of the underground structure shown in FIGS. 6 to 8 is
It is possible to construct safely and reliably at low cost because it is performed simultaneously with the excavation of the underground structure without constructing the protective work of the underground structure to be excavated in the ground in advance. First, the contents will be explained, and thus the purpose of the present invention will be clarified.
第6図に示すように、鉄道等上部交通1の脇に土留鋼矢
板2を打設して、発進坑3と到達坑4を築造し、該発進
坑3内に圧入機5を設置してこれでルーフ用筒体6を到
達坑4へ向けて圧入させる。第9図は該ルーフ用筒体6
の正面図で、断面矩形の鋼管であり、側面に鉤状の継手
6a,6bを長手方向に連続して形成し、また上面に鋼板の
平板からなるフリクションカッター7をその先端同士を
溶接することで取付けている。As shown in FIG. 6, a retaining steel sheet pile 2 is placed beside the upper traffic 1 such as a railway to construct a starting pit 3 and a reaching pit 4, and a press-fitting machine 5 is installed in the starting pit 3. With this, the roof cylinder 6 is press-fitted toward the reaching pit 4. FIG. 9 shows the roof cylinder 6
Is a steel pipe with a rectangular cross section and a hook-shaped joint on the side.
6a and 6b are formed continuously in the longitudinal direction, and a friction cutter 7 made of a flat plate of a steel plate is attached to the upper surface by welding the tips to each other.
また、前記圧入機5は、この筒体6のジャッキ等による
押出機構とオーガー等による筒体6の内部掘削機構とを
有する。The press-fitting machine 5 has an extruding mechanism such as a jack of the cylindrical body 6 and an internal excavating mechanism of the cylindrical body 6 such as an auger.
なお、ルーフ用筒体6は適宜長さのものを長さ方向に順
次接続して必要長を埋設するもので、初めの一本を圧入
機5で圧入したならば、この圧入機5を後退させ、その
空所に次の筒体6をセットし、フリクションカッター7
同士、筒体6同士を溶接接合してその長さを延長してか
ら再度圧入機5で圧入していく。It should be noted that the roof cylinder 6 has a proper length and is sequentially connected in the length direction to bury the required length. If the first one is press-fitted by the press-fitting machine 5, the press-fitting machine 5 is retracted. The next cylinder 6 is set in the empty space, and the friction cutter 7
They are welded to each other and the tubular bodies 6 are welded to each other to extend the length thereof, and then the press-fitting machine 5 presses them again.
一方、ルーフ用筒体6は継手6a,6bを介して第10図に示
すように横方向に連続しながら並列させ、盤状桁のごと
くする。On the other hand, the roof cylinders 6 are arranged side by side through the joints 6a and 6b while being continuously continuous in the lateral direction as shown in FIG.
次いで、第7図に示すように発進坑3内に反力壁8、コ
ンクリート函体による地下構造物9をセットし、反力壁
8と地下構造物9との間には推進ジャッキ10を設け、地
下構造物9の先端に刃口11を設けるとともに地下構造物
9の先端と前記ルーフ用筒体6との間に小ジャッキ12を
介在させる。Next, as shown in FIG. 7, a reaction wall 8 and an underground structure 9 made of a concrete box are set in the starting pit 3, and a propulsion jack 10 is provided between the reaction wall 8 and the underground structure 9. A blade 11 is provided at the tip of the underground structure 9 and a small jack 12 is interposed between the tip of the underground structure 9 and the roof cylinder 6.
図中13はルーフ用筒体6の支持材、14はフリクションカ
ッター7の止め部材でこれらは発進坑3側に設け、一
方、到達坑4側に受台15を設ける。In the figure, 13 is a support member for the roof cylinder 6, 14 is a stop member for the friction cutter 7, which are provided on the starting pit 3 side, while a pedestal 15 is provided on the reaching pit 4 side.
小ジャッキ12を伸長して地下構造物9を反力として、前
記先端同士を溶接を離しフリクションカッター7を地中
に残しながらルーフ用筒体6を1本ずつ順次押し進め、
一通り筒体6が前進したならば、小ジャッキ12を縮め今
度は推進ジャッキ10を伸長して地下構造物9を掘進させ
る。この地下構造物9の掘進での掘削は、ルーフ用筒体
6の並列した版状桁下で安全に行われる。While extending the small jack 12 and using the underground structure 9 as a reaction force, the tip ends of the welds are separated from each other and the friction cutters 7 are left in the ground, while pushing the roof cylinders 6 one by one.
Once the tubular body 6 has moved forward, the small jack 12 is contracted and the propulsion jack 10 is extended this time to advance the underground structure 9. The excavation of the underground structure 9 by excavation is safely performed under the plate girders in parallel with the roof cylinder 6.
図中16は推進ジャッキ10と地下構造物9間に介在させる
ストラットを示す。Reference numeral 16 in the figure denotes a strut interposed between the propulsion jack 10 and the underground structure 9.
このようにして、ルーフ用筒体6の前進と地下構造物9
の前進とを交互に繰り返しながら、到達坑4に出たルー
フ用筒体6の部分は順次溶接部分を切断することで、当
初の短尺なものにして撤去する。In this way, the forward movement of the roof cylinder 6 and the underground structure 9
While alternately repeating the forward movement, the portion of the roof tubular body 6 that has come out of the reaching pit 4 is cut off in sequence by sequentially cutting the welded portion and removed.
そして、地下構造物9の先端が到達坑4に達したなら
ば、刃口11等を撤去し適宜裏込めグラウトを行って施工
を完了する。Then, when the tip of the underground structure 9 reaches the reaching pit 4, the blade opening 11 and the like are removed and backfilling grout is appropriately performed to complete the construction.
なお、地下構造物9はプレキャスト製のコンクリート函
体を順次発進坑3内に吊り降ろして接続していくように
してもよいし、発進坑3内でコンクリートを打設して必
要長を増設するようにしてもよい。The underground structure 9 may be constructed by sequentially suspending and connecting precast concrete boxes in the start pit 3 or by placing concrete in the start pit 3 to increase the required length. You may do it.
また、該地下構造物9の推進方法に関しても到達坑4側
に反力壁及びセンターホール式のけん引ジャッキを設
け、一端を地下構造物9に定着したP.C鋼線によるけん
引部材をこのけん引ジャッキで引くことにより到達坑4
側から地下構造物9を引き込むようにすることもでき
る。Regarding the propulsion method of the underground structure 9, a reaction wall and a center-hole type towing jack are provided on the side of the reaching pit 4, and a towing member made of PC steel wire having one end fixed to the underground structure 9 is used with this towing jack. Reaching pit 4 by pulling
The underground structure 9 can be pulled in from the side.
ところで、前記第6図〜第8図に示す地下構造物の施工
法は、鋼板の平板からなるフリクションカッター7はル
ーフ用筒体6とともに地中に圧入するもので、その後こ
のフリクションカッター7のみを残してルーフ用筒体6
だけを推進させる。By the way, in the method for constructing an underground structure shown in FIGS. 6 to 8, the friction cutter 7 made of a flat plate of a steel plate is press-fitted into the ground together with the roof tubular body 6, and then only the friction cutter 7 is used. Remaining roof cylinder 6
Only promote.
したがって、ルーフ用筒体6を順次溶接で繋げて圧入し
ていく際にこのフリクションカッター7も溶接で繋げて
いくことが必要となり、また発進坑3側に設けるフリク
ションカッター7の止め部材14は、常に新たに繋げた最
後のフリクションカッター7の最後尾を固定するように
盛り変えなければならない。Therefore, when the roof cylinders 6 are sequentially welded and press-fitted, the friction cutter 7 also needs to be welded, and the stop member 14 of the friction cutter 7 provided on the side of the starting pit 3 is The rear end of the newly connected friction cutter 7 must always be fixed.
このような作業の手間が、非常に煩雑で面倒であった。The labor of such work was very complicated and troublesome.
一方、ルーフ用筒体6を圧入機5で地中に圧入する際に
上向きに曲がりを生じると、フリクションカッター7も
この曲がりに応じてセットされてしまい、さらに地下構
造物9の推進にも曲がりを生じることになる。On the other hand, when the roof cylinder 6 is pressed into the ground by the press-fitting machine 5, if it bends upward, the friction cutter 7 is also set according to this bending, and further bends to propel the underground structure 9. Will occur.
さらに、フリクションカッター7を発進坑3から到達坑
4まで敷設するには、ルーフ用筒体6も発進坑3から到
達坑4まで達するように圧入しなければならない。Furthermore, in order to lay the friction cutter 7 from the starting pit 3 to the reaching pit 4, the roof cylinder 6 must also be press-fitted to reach from the starting pit 3 to the reaching pit 4.
本発明の目的は前記従来例の不都合を解消し、フリクシ
ョンカッターを簡単かつ正確に水平に並べて埋設できる
ことにより、施工手数や工期の削減を期し、しかもルー
フ用筒体の適正な推進ひいては地下構造物の的確な推進
が得られるとともに、短いルーフ用筒体の使用も可能と
する地下構造物の施工法を提供することにある。The object of the present invention is to eliminate the inconvenience of the conventional example, and to bury the friction cutters horizontally and easily and accurately, thereby aiming to reduce the number of construction steps and the construction period, and to properly propel the cylinder for the roof and thus the underground structure. The object of the present invention is to provide a method for constructing an underground structure, which can obtain appropriate propulsion and can use a short roof cylinder.
本発明は前記目的を達成するため、発進坑から到達坑ま
で鋼板等の平板からなるフリクションカッターを地上か
ら開削して地表近くに水平に並べて埋設し、その後断面
矩形の鋼管によるルーフ用筒体をこのフリクションカッ
ターの直下にその上面が接合するように発進坑から地中
に水平方向に圧入して並列させ、発進坑に残るルーフ用
筒体の後端に小ジャッキを設け、該小ジャッキの後方に
地下構造物を配設し、地下構造物を反力部材として小ジ
ャッキでルーフ用筒体をフリクションカッターを残しな
がら押し進めるとともに、地下構造物は在来工法で掘進
させること、もしくは、発進坑から到達坑まで鋼板等の
平板からなるフリクションカッターを地上から開削して
地表近くに水平に並べて埋設し、その後断面矩形の鋼管
によるルーフ用筒体をこのフリクションカッターの直下
にその上面が接合するように発進坑から地中に水平方向
に圧入して並列させ、発進坑に残るルーフ用筒体の後端
の後方に地下構造物を配設し、地下構造物とルーフ用筒
体をフリクションカッターを残しながら同時に掘進させ
ることを要旨とするものである。In order to achieve the above-mentioned object, the present invention excavates a friction cutter made of a flat plate such as a steel plate from the starting pit to the arriving pit from the ground and horizontally lays it near the surface of the ground, and then bury the roof tubular body with a steel pipe having a rectangular cross section. A small jack is provided at the rear end of the roof cylinder that remains in the starting pit, by horizontally press-fitting it horizontally into the ground from the starting pit so that its upper surface is joined just below this friction cutter, and arranging the rear jack behind the small jack. The underground structure is installed in the ground, and the underground structure is used as a reaction member to push the roof cylinder with a small jack while leaving the friction cutter, and the underground structure is dug by the conventional construction method, or from the start pit. A friction cutter consisting of a flat plate such as a steel plate is excavated from the ground to the arriving pit, and is laid horizontally near the surface of the ground, and then buried. Are horizontally pressed into the ground from the start pit so that the upper surface of the friction cutter is joined directly below, and the underground structure is placed behind the rear end of the roof cylinder that remains in the start pit. The gist is to simultaneously excavate the underground structure and the roof cylinder while leaving the friction cutter.
請求項第1項記載の本発明によれば、発進坑から到達坑
までの間の鋼板等の平板からなるフリクションカッター
は、地上から開削して地表近くに水平に並べて埋設する
ので、正確に水平に地中に敷並べることができる。According to the present invention as set forth in claim 1, the friction cutter, which is made of a flat plate such as a steel plate between the starting pit and the reaching pit, is excavated from the ground and is horizontally arranged near the surface of the ground to be buried. It can be laid in the ground.
このようにして、発進坑内に圧入機を設置してこれでル
ーフ用筒体をその上面をフリクションカッターの下面に
接合するようにして到達坑へ向けて圧入させれば、ルー
フ用筒体はスムーズに圧入される。In this way, if a press-fitting machine is installed in the starting pit and the upper surface of the roof cylinder is joined to the lower surface of the friction cutter so that it is pressed into the reaching pit, the roof cylinder will be smooth. Is pressed into.
さらに、発進坑内に反力壁、推進ジャッキ、コンクリー
ト函体による地下構造物をセットし、地下構造物の先端
と前記ルーフ用筒体との間に小ジャッキを介在させ、止
め部材でフリクションカッターの後端を発進坑側に固定
しながら、小ジャッキを伸長して地下構造物を反力とし
てルーフ用筒体を1本ずつ順次押し進め、一通り筒体が
前進したならば、小ジャッキを縮め今は推進ジャッキを
伸長して地下構造物を掘進させるが、ルーフ用筒体はフ
リクションカッターをガイドとして進行するので、摩擦
係数が少なくスムーズに進行し、かつフリクションカッ
ターに押さえられて上向きに曲がるおそれはない。Furthermore, a reaction wall, a propulsion jack, and an underground structure consisting of a concrete box are set in the starting pit, a small jack is interposed between the tip of the underground structure and the roof cylinder, and a friction cutter is used as a stop member. While fixing the rear end to the starting pit side, the small jacks are extended and the underground structure is used as a reaction force to push the roof cylinders one by one, and if the cylinders move forward, then the small jacks will be retracted. Extends the propulsion jack to dig underground structures, but since the roof cylinder moves with the friction cutter as a guide, it moves smoothly with a low friction coefficient, and there is no risk of it being pressed upward by the friction cutter. Absent.
また、ルーフ用筒体は常にフリクションカッターとは縁
が切れており、結合部分が全くないので、このルーフ用
筒体は必ずしも到達坑に貫通する長さのものを当初から
地中に圧入する必要はなく、短いルーフ用筒体を地下構
造物とともに順次前進させるようにすることもできる。Also, since the roof cylinder is always cut off from the friction cutter and there is no connecting part, this roof cylinder must always have a length that penetrates the reach shaft from the beginning. Alternatively, the short roof cylinder can be advanced sequentially with the underground structure.
請求項第2項記載の本発明によれば、ルーフ用筒体の圧
入までは請求項第1項記載の発明と同じであり、発進坑
内に反力壁、推進ジャッキ、コンクリート函体による地
下構造物をセットし、地下構造物の先端と前記ルーフ用
筒体とを結合して、止め部材でフリクションカッターの
後端を発進坑側に固定しながら、推進ジャッキを伸長し
て地下構造物とルーフ用筒体を同時に掘進させる。According to the second aspect of the present invention, the steps up to the press-fitting of the roof cylinder are the same as those of the first aspect of the present invention, and an underground structure including a reaction wall, a propulsion jack, and a concrete box in the starting pit. Set the object, connect the tip of the underground structure and the roof cylinder, and fix the rear end of the friction cutter to the starting pit side with a stop member, while extending the propulsion jack to extend the underground structure and roof. The barrel is digging at the same time.
以下、図面について本発明の実施例を詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第1図〜第5図は本発明の地下構造物の施工法の1実施
例を示す各工程の側面図で、前記従来例を示す第6図〜
第8図と同一構成要素には同一参照番号を付したもので
ある。1 to 5 are side views of respective steps showing one embodiment of the method for constructing an underground structure according to the present invention, and FIG. 6 showing the conventional example.
The same components as those in FIG. 8 are designated by the same reference numerals.
第1図、第2図に示すように、土留鋼矢板2を打設して
発進坑3と到達坑4を築造するが、それと並行して発進
坑3から到達坑4までを地上から開削して地表近くにフ
リクションカッター7を正確に水平に並べて埋設する。As shown in Fig. 1 and Fig. 2, the retaining steel sheet pile 2 is driven to construct the starting pit 3 and the reaching pit 4, and in parallel with this, the starting pit 3 to the reaching pit 4 are excavated from the ground. The friction cutters 7 are accurately arranged horizontally and buried near the ground surface.
このフリクションカッター7は適宜長さの短いものを溶
接で繋げながら順次埋めていけばよく、一本設置するた
めの掘削幅も狭くしかもその埋設個所は地上から深く無
いところなので、土留め工等も不要で、レベルも正確な
ものとなる。This friction cutter 7 may be buried in a short length as needed by connecting it by welding, and the excavation width for installing one is narrow and the buried part is not deep from the ground, so earth retaining works etc. It is unnecessary and the level is accurate.
そして、鉄道等上部交通1の個所ではその下を潜らせる
ようにしてフリクションカッター7を敷設するが、仮受
け18を上部交通1の下に介在させれば、一本のフリクシ
ョンカッター7を埋設する掘削作業は交通を遮断させず
に短時間で支障なくできる。Then, at a portion of the upper traffic 1 such as a railway, the friction cutter 7 is laid so as to dive under the upper traffic 1. However, if the temporary receiver 18 is interposed under the upper traffic 1, one friction cutter 7 is buried. Excavation work can be done in a short time without interrupting traffic.
また、フリクションカッター7は掘削溝内に収めてから
埋戻して埋設するが、横方向に並列させるフリクション
カッター7は一本ずつ埋設し、長さ方向においては発進
坑3側、到達坑4、もしくは中間部の何れからでも都合
のよい個所から埋設を始めることができる。Further, the friction cutters 7 are stored in the excavation trench and then buried back, but the friction cutters 7 arranged in parallel in the lateral direction are buried one by one, and in the length direction, the starting pit 3 side, the reaching pit 4, or The embedding can start from any convenient location in the middle.
このようにフリクションカッター7を地中に敷設してか
ら、第3図に示すように発進坑3内に圧入機5を設置し
てこれで第9図に示すような側面に鉤状の継手6a,6bを
長手方向に連続して形成したルーフ用筒体6をフリクシ
ョンカッター7の直下にその上面が接合するようにし
て、到達坑4へ向けて圧入させかつ横方向に並列させ
る。After the friction cutter 7 is laid in the ground in this way, the press-fitting machine 5 is installed in the starting pit 3 as shown in FIG. 3 and the hook-like joint 6a is provided on the side surface as shown in FIG. , 6b are formed continuously in the longitudinal direction so that the upper surface of the roof cylinder 6 is joined directly below the friction cutter 7 so that the roof cylinder 6 is press-fitted toward the reaching pit 4 and arranged side by side in the lateral direction.
図中14はフリクションカッター7の止め部材でこれでフ
リクションカッター7の後尾を発進坑3側に固定し、一
方、到達坑4側に受台15を設ける。In the figure, reference numeral 14 denotes a stopper member for the friction cutter 7, whereby the rear end of the friction cutter 7 is fixed to the starting pit 3 side, while the pedestal 15 is provided on the reaching pit 4 side.
次いで、第4図に示すように発進坑3内に反力壁8を、
さらにその前にコンクリート函体による地下構造物9を
セットし、反力壁8と地下構造物9との間には推進ジャ
ッキ10を設け、地下構造物9の先端に刃口11を設けると
ともに地下構造物9の先端と前記ルーフ用筒体6との間
に推進装置としての小ジャッキ12を介在させる。Then, as shown in FIG. 4, the reaction wall 8 is set in the starting shaft 3
Furthermore, an underground structure 9 made of a concrete box is set in front of it, a propulsion jack 10 is provided between the reaction wall 8 and the underground structure 9, and a blade opening 11 is provided at the tip of the underground structure 9 and the underground structure 9 is installed underground. A small jack 12 as a propulsion device is interposed between the tip of the structure 9 and the roof cylinder 6.
小ジャッキ12を伸長して地下構造物9を反力としてフリ
クションカッター7を残しながらルーフ用筒体6を押し
進める。The roof jack 6 is pushed forward while the small jack 12 is extended and the underground structure 9 is used as a reaction force to leave the friction cutter 7.
一通り筒体6が前進したならば、小ジャッキ12の縮め今
度は推進ジャッキ10を伸長して地下構造物9を掘進させ
る。この地下構造物9の前進もフリクションカッター7
で摩擦抵抗を少なくして行われる。図中16は推進ジャッ
キ10と地下構造物9間に介在させるストラットを示す。Once the tubular body 6 has moved forward, the small jack 12 is contracted, and then the propulsion jack 10 is extended to advance the underground structure 9. The forward movement of this underground structure 9 also applies to the friction cutter 7.
With less friction resistance. Reference numeral 16 in the figure denotes a strut interposed between the propulsion jack 10 and the underground structure 9.
このようにして、ルーフ用筒体6の前進と地下構造物9
の前進とを交互に繰り返しながら、到達坑4に出たルー
フ用筒体6の途中は順次切断撤去する。In this way, the forward movement of the roof cylinder 6 and the underground structure 9
While alternately repeating the above-mentioned forward movement, the middle of the roof tubular body 6 that has emerged in the reaching pit 4 is sequentially cut and removed.
そして、地下構造物9の先端が到達坑4に達したなら
ば、刃口11等を撤去して適宜裏込めグラウトを行って施
工を完了する。When the tip of the underground structure 9 reaches the reaching pit 4, the blade opening 11 and the like are removed and backfilling grout is performed as appropriate to complete the construction.
フリクションカッター7はそのまま埋殺してもよいし、
発進坑3や到達坑4から引き抜き撤去してもよい。The friction cutter 7 may be buried as it is,
It may be pulled out from the starting pit 3 or the reaching pit 4 and removed.
なお、地下構造物9はプレキャスト製のコンクリート函
体を順次発進坑3内に吊り降ろして接続していくように
してもよいし、発進坑3内でコンクリートを打設して必
要長を増設するようにすることもできる。The underground structure 9 may be constructed by sequentially suspending and connecting precast concrete boxes in the start pit 3 or by placing concrete in the start pit 3 to increase the required length. You can also do so.
また、該地下構造物9の推進方法に関しても到達坑4側
に反力壁及びセンターホール式のけん引ジャッキを設
け、一端を地下構造物9に定着したP.C鋼線によるけん
引部材をこのけん引ジャッキで引くことにより到達坑4
側から地下構造物9を引き込むことも可能である。Regarding the propulsion method of the underground structure 9, a reaction wall and a center-hole type towing jack are provided on the side of the reaching pit 4, and a towing member made of PC steel wire having one end fixed to the underground structure 9 is used with this towing jack. Reaching pit 4 by pulling
It is also possible to pull in the underground structure 9 from the side.
さらに、他の実施例として、ルーフ用筒体6は必ずしも
到達坑4に貫通する長さのものを当初から地中に圧入す
る必要はなく、短いルーフ用筒体6を地下構造物9とと
もに順次前進させるようにすることもできる。Further, as another embodiment, it is not always necessary to press-fit the roof cylinder 6 having a length penetrating the reaching pit 4 into the ground from the beginning, and the short roof cylinder 6 is sequentially arranged with the underground structure 9. You can also move it forward.
このようにすることで、ルーフ用筒体6の長さを従来よ
りも短くでき、材料費の節減やルーフ用筒体6を押し進
める手間、及びルーフ用筒体6を到達坑4で切断撤去す
る手間を少なくできる。By doing so, the length of the roof cylinder 6 can be made shorter than in the conventional case, the material cost can be reduced, the effort of pushing the roof cylinder 6 forward, and the roof cylinder 6 being cut and removed at the reaching hole 4. You can save time.
さらに他の実施例として、小ジャッキ12を用いない方法
もある。Still another embodiment is a method without using the small jack 12.
前記、第4図に示す段階で発進坑3内に反力壁8を、さ
らにその前にコンクリート函体による地下構造物9をセ
ットし、反力壁8と地下構造物9との間には推進ジャッ
キ10を設け、地下構造物9の先端に刃口11を設けるとと
もに地下構造物9の先端と前記ルーフ用筒体6とは枠体
等で結合する。At the stage shown in FIG. 4, the reaction wall 8 is set in the starting pit 3 and further the underground structure 9 made of a concrete box is set in front of it, and between the reaction wall 8 and the underground structure 9. A propulsion jack 10 is provided, a blade 11 is provided at the tip of the underground structure 9, and the tip of the underground structure 9 and the roof cylinder 6 are connected by a frame or the like.
そして、推進ジャッキ10を伸長して地下構造物9及びル
ーフ用筒体6を同時に掘進させる。Then, the propulsion jack 10 is extended to simultaneously excavate the underground structure 9 and the roof cylinder 6.
このようにして、ルーフ用筒体6と地下構造物9とを同
時に前進させながら、到達坑4に出たルーフ用筒体6の
途中は順次切断撤去する。In this way, while the roof cylinder 6 and the underground structure 9 are simultaneously advanced, the middle of the roof cylinder 6 that has emerged in the reaching pit 4 is cut and removed in sequence.
そして、地下構造物9の先端が到達坑4に達したなら
ば、刃口11等を撤去して適宜裏込めグラウトを行って施
工を完了する。When the tip of the underground structure 9 reaches the reaching pit 4, the blade opening 11 and the like are removed and backfilling grout is performed as appropriate to complete the construction.
以上述べたように本発明の地下構造物の施工法は、フリ
クションカッターを簡単かつ正確に水平に並べて埋設で
きることにより、施工手数や工期の削減を期し、しかも
ルーフ用筒体ひいては地下構造物の上向きの曲がりを抑
制して適正な推進が得られるものである。As described above, the construction method of the underground structure of the present invention aims to reduce the number of construction steps and the construction period by arranging the friction cutters horizontally and easily and accurately, and further, the roof cylinder and thus the upward direction of the underground structure. It is possible to obtain proper propulsion by suppressing the bending of.
また、短いルーフ用筒体の使用も可能とし、コストダウ
ンと工期の短縮を図ることもできるものである。Further, it is possible to use a short roof cylinder, which can reduce the cost and the construction period.
第1図〜第5図は本発明の地下構造物の施工法の1実施
例を示す各工程の側面図、第6図〜第8図は従来の地下
構造物の施工法の各工程を示す側面図、第9図はルーフ
用筒体の正面図、第10図はルーフ用筒体の配置例を示す
正面図である。 1……上部交通、2……土留鋼矢板 3……発進坑、4……到達坑 5……圧入機 6……ルーフ用筒体、6a,6b……継手 7……フリクションカッター 8……反力壁、9……地下構造物 10……推進ジャッキ、11……刃口 12……小ジャッキ、13……支持材 14……止め部材、15……受台 16……ストラット 18……仮受け。1 to 5 are side views of respective steps showing one embodiment of the method for constructing an underground structure of the present invention, and FIGS. 6 to 8 show respective steps of a method for constructing an underground structure of the related art. FIG. 9 is a side view, FIG. 9 is a front view of the roof cylinder, and FIG. 10 is a front view showing an arrangement example of the roof cylinder. 1 …… Upper traffic, 2 …… Soil retaining steel sheet pile 3 …… Starting pit, 4 …… Driving pit 5 …… Pressing machine 6 …… Roof cylinder, 6a, 6b …… Joint 7 …… Friction cutter 8 …… Reaction wall, 9 …… Underground structure 10 …… Propulsion jack, 11 …… Blade 12 …… Small jack, 13 …… Supporting material 14 …… Stopping member, 15 …… Bed 16 …… Strut 18 …… Provisional receiving.
Claims (2)
るフリクションカッターを地上から開削して地表近くに
水平に並べて埋設し、その後断面矩形の鋼管によるルー
フ用筒体をこのフリクションカッターの直下にその上面
が接合するように発進坑から地中に水平方向に圧入して
並列させ、発進坑に残るルーフ用筒体の後端に小ジャッ
キを設け、該小ジャッキの後方に地下構造物を配設し、
地下構造物を反力部材として小ジャッキでルーフ用筒体
をフリクションカッターを残しながら押し進めるととも
に、地下構造物は在来工法で掘進させることを特徴とす
る地下構造物の施工法。1. A friction cutter made of a flat plate such as a steel plate from the starting pit to the arrival pit is excavated from the ground and horizontally arranged near the surface of the ground, and then buried. Then, a roof cylinder made of a steel pipe having a rectangular cross section is provided directly under the friction cutter. In order to connect the upper surface to the ground, press horizontally into the ground from the starting pit to make them parallel, and provide a small jack at the rear end of the roof cylinder that remains in the starting pit, and place an underground structure behind the small jack. Arranged,
A method for constructing an underground structure, characterized in that the underground cylinder is pushed by a small jack while the friction cutter is used as a reaction force member while leaving the friction cutter, and the underground structure is dug by the conventional method.
るフリクションカッターを地上から開削して地表近くに
水平に並べて埋設し、その後断面矩形の鋼管によるルー
フ用筒体をこのフリクションカッターの直下にその上面
が接合するように発進坑から地中に水平方向に圧入して
並列させ、発進坑に残るルーフ用筒体の後端の後方に地
下構造物を配設し、地下構造物とルーフ用筒体をフリク
ションカッターを残しながら同時に掘進させることを特
徴とする地下構造物の施工法。2. A friction cutter made of a flat plate such as a steel plate from the starting pit to the arrival pit is excavated from the ground and horizontally arranged and buried near the surface of the ground, and then a roof cylinder made of a steel pipe having a rectangular cross section is provided directly under the friction cutter. The horizontal structure is press-fitted horizontally into the ground from the start pit so that its upper surface is joined to the ground, and the underground structure is placed behind the rear end of the roof cylinder that remains in the start pit. A method of constructing an underground structure, characterized in that the cylinder for work is simultaneously advanced while leaving a friction cutter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9396589A JPH0681879B2 (en) | 1989-04-13 | 1989-04-13 | Construction method of underground structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9396589A JPH0681879B2 (en) | 1989-04-13 | 1989-04-13 | Construction method of underground structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02272192A JPH02272192A (en) | 1990-11-06 |
JPH0681879B2 true JPH0681879B2 (en) | 1994-10-19 |
Family
ID=14097120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9396589A Expired - Lifetime JPH0681879B2 (en) | 1989-04-13 | 1989-04-13 | Construction method of underground structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0681879B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008223397A (en) * | 2007-03-15 | 2008-09-25 | Uemura Giken Kogyo Kk | Construction method for underground structure |
JP7093930B2 (en) * | 2019-11-29 | 2022-07-01 | 鹿島建設株式会社 | Main push jack equipment in the box propulsion method and the box propulsion method using it |
JP7157193B2 (en) * | 2021-03-01 | 2022-10-19 | 誠 植村 | Box-shaped roof and box-shaped roof construction method using it |
-
1989
- 1989-04-13 JP JP9396589A patent/JPH0681879B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02272192A (en) | 1990-11-06 |
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