JPH0553891B2 - - Google Patents
Info
- Publication number
- JPH0553891B2 JPH0553891B2 JP1344443A JP34444389A JPH0553891B2 JP H0553891 B2 JPH0553891 B2 JP H0553891B2 JP 1344443 A JP1344443 A JP 1344443A JP 34444389 A JP34444389 A JP 34444389A JP H0553891 B2 JPH0553891 B2 JP H0553891B2
- Authority
- JP
- Japan
- Prior art keywords
- shield machine
- underground structure
- open shield
- tail
- propulsion jack
- 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
- 238000010276 construction Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、市街地に上下水道、共同溝、電信、
電話等の布設地下道等の地下構造物を施工するオ
ープンシールド工法に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention is applicable to urban areas for water supply and sewage, public drainage, telegraph,
Concerning the open shield construction method for constructing underground structures such as underground passages for laying telephones, etc.
オープンシールド工法は、開削工法（オープン
工法）とシールド工法の長所を生かした合理性に
富む工法である。
The open shield construction method is a highly rational construction method that takes advantage of the advantages of the cut-and-cover construction method (open construction method) and the shield construction method.
第６図、第７図にその概略を示すと、図中１は
オープンシールド機で、これは左右の側壁板１
ａ，１ｂとこれら側壁板１ａ，１ｂと同程度の長
さでその間を連結する底板１ｃとからなる前面、
後面及び上面を開口したＵ型シールド機である。
該オープンシールド機１は前記側壁板１ａ，１ｂ
と底板１ｃの先端を断面三角状の刃口２，２′と
して形成し、また側壁板１ａ，１ｂの中央又は後
端近くに推進ジヤツキ３を後方に向上下にけ並べ
て配設する。 The outline is shown in Fig. 6 and Fig. 7. In the figure, 1 is an open shield machine, and this is the left and right side wall plate 1.
a, 1b and a bottom plate 1c having the same length as the side wall plates 1a, 1b and connecting them;
It is a U-shaped shield machine with openings on the rear and top sides.
The open shield machine 1 has the side wall plates 1a and 1b.
The tip of the bottom plate 1c is formed as a cutting edge 2, 2' having a triangular cross-section, and the propulsion jacks 3 are disposed in the center or near the rear end of the side wall plates 1a, 1b so as to be oriented rearward and downward.
図中７は、推進ジヤツキ３の後端に設けた押圧
部材で、ボツクス鋼材又は型鋼を用いた枠体より
なる。 Reference numeral 7 in the figure denotes a pressing member provided at the rear end of the propulsion jack 3, which is made of a frame made of box steel or shaped steel.
発進坑内にこのオープンシールド機１を設置し
て、シールド機１の前面又は上面開口より発進坑
の前方の土砂を掘削し、かつ排土する。そして、
シールド機１の推進ジヤツキ３を伸長して発進坑
内の反力壁に反力をとつてシールド機１を前進さ
せ、コンクリート函体等による第１番目の地中構
造物４を上方から吊り降し、シールド機１のテー
ル部１ｄ内で縮めた推進ジヤツキ３の後方にセツ
トする。 This open shield machine 1 is installed in a starting shaft, and earth and sand in front of the starting shaft is excavated and discharged from the front or top opening of the shield machine 1. and,
The propulsion jack 3 of the shield machine 1 is extended to apply a reaction force to the reaction wall in the launch shaft to advance the shield machine 1, and the first underground structure 4 made of a concrete box or the like is suspended from above. , is set behind the propulsion jack 3 which is retracted within the tail portion 1d of the shield machine 1.
次いで、シヨベル等の掘削機６で同様にオープ
ンシールド機１の前面又は上面から土砂を掘削し
かつ排土してからシールド機１を前進させ、前記
第１番目の地中構造物４の前に第２番目の地中構
造物４をシールド機１のテール部１ｄ内に吊り降
す。以下、同様の掘進及び地中構造物４のセツト
工程を繰返して、順次地中構造物４を縦列に地中
に埋設し、後方の地中構造物４上に埋戻し５を施
し、オープンシールド機１が到達坑まで達したな
らばこれを撤去して工事を完了する。 Next, earth and sand is similarly excavated from the front or top surface of the open shield machine 1 using an excavator 6 such as a shovel, and the earth is removed, and then the shield machine 1 is moved forward and placed in front of the first underground structure 4. The second underground structure 4 is suspended into the tail portion 1d of the shield machine 1. Thereafter, the same excavation and setting process of the underground structures 4 is repeated to sequentially bury the underground structures 4 in the ground in columns, backfill 5 is applied on the rear underground structures 4, and open shielding is performed. Once Machine 1 reaches the destination shaft, it will be removed and the construction will be completed.
このようなオープンシールド工法では、前記の
ごとくコンクリート函体等による地中構造物４
は、シールド機１のテール部１ｄ内に吊り降さ
れ、オープンシールド機１の前進とともに該テー
ル部１ｄから出て地中に残されていくものであ
り、後方の地中構造物４とは鋼棒やカラーで接続
するが、地盤が軟弱な場合は沈下するおそれがあ
る。
In such open shield construction method, as mentioned above, underground structures such as concrete boxes 4
is suspended in the tail part 1d of the shield machine 1, and as the open shield machine 1 moves forward, it comes out from the tail part 1d and remains underground. They are connected using rods or collars, but if the ground is soft, there is a risk of subsidence.
このように対策としては、薬液注入工法や凍結
工法を併用して地中構造物４を設置すべき地盤の
周囲を改良することも考えられるが、工費が高騰
し、また工期も長くなる。 As a countermeasure, it may be possible to improve the area around the ground where the underground structure 4 is to be installed by using a chemical injection method or a freezing method in combination, but this would increase the construction cost and lengthen the construction period.
一方、近年、地下道等の地中構造物も大断面の
ものが要求されるが、このような大断面の地中構
造物を埋設するに地盤が軟弱のものでなくとも地
中構造物の沈下防止の対策を要求され、オープン
シールド工法では前記地盤改良以外に適切なもの
はなかつた。 On the other hand, in recent years, underground structures such as underground passages are required to have large cross-sections, but burying underground structures with such large cross-sections does not require the ground to be soft or soft. Countermeasures were required to prevent this, and with the open shield construction method, there was nothing suitable other than the ground improvement described above.
本発明の目的は前記従来例の不都合を解消し、
工程中における杭の打設で地中構造物の支持力を
増すことができ、地中構造物の沈下を簡単に防止
できるオープンシールド工法を提供することにあ
る。 The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide an open shield construction method that can increase the supporting capacity of an underground structure by driving piles during the process and easily prevent the subsidence of the underground structure.
本発明は前記目的を達成するため、左右側壁板
の内側に推進ジヤツキを配設し、前面、後面及び
上面を開口したオープンシールド機の前面又は上
面開口より前方の土砂を掘削排土し、推進ジヤツ
キを伸長してコンクリート函体等による既設地中
構造物を反力してシールド機を前進させ、シール
ド機のテール部内で縮めた推進ジヤツキの後方に
新たな地中構造物を上方から吊り降し、次いで、
シヨベル等の掘削機で同様にオープンシールド機
の前面又は上面から土砂を掘削排土してからシー
ルド機を前進させ、かかる工程を繰り返して順次
地中構造物を縦列に埋設するオープンシールド工
法において、オープンシールド機はそのテール部
へ大断面の地中構造物の吊り降しが可能なように
全体断面形状が大型のものであり、テール部底板
に後端へ末拡がり形状で開口する略三角形の切欠
きを形成し、また、前記側壁板間で形成される前
部開口内を仕切壁で横方向に区画して複数の開口
に分割し、さらにこの仕切壁の前端を刃口と平行
に並ぶ刃口とし、このようなオープンシールド機
の掘進の際の掘削は、前記各前部開口に対応して
地上にシヨベル等の掘削機を複数並べ、各開口単
位で同時進行で行い、さらに、推進ジヤツキを伸
長してシールド機を前進させると、最前列の地中
構造物の下か該切欠きが現れるので、この切欠き
の先頭部を介して孔を掘削して杭を打設し、この
杭の頭部でテール部に新たに吊り下ろす地中構造
物を支持させることを要旨とするものである。
In order to achieve the above object, the present invention disposes a propulsion jack inside the left and right side wall plates, excavates and removes earth and sand in front of the front or top opening of an open shield machine with openings on the front, rear, and top surfaces, and propels the machine. The shield machine is advanced by extending the jack and reacting against the existing underground structure such as a concrete box, and the new underground structure is suspended from above behind the propulsion jack, which has been retracted within the tail of the shield machine. Then,
In the open shield construction method, earth and sand is similarly excavated from the front or top surface of the open shield machine using an excavator such as a shovel, the shield machine is advanced, and this process is repeated to sequentially bury underground structures in a vertical line. The open shield machine has a large overall cross-sectional shape so that underground structures with a large cross section can be suspended from the tail part, and the bottom plate of the tail part has a roughly triangular opening that widens toward the rear end. A notch is formed, and the front opening formed between the side wall plates is laterally divided by a partition wall into a plurality of openings, and the front end of the partition wall is arranged parallel to the cutting edge. When excavating with such an open shield machine, a plurality of excavators such as shovels are lined up on the ground corresponding to each of the front openings, and each opening is simultaneously advanced. When the jack is extended and the shield machine is moved forward, a notch will appear under the underground structure in the front row.Drill a hole through the top of this notch and drive a pile. The gist of this is to allow the head and tail of the pile to support a newly suspended underground structure.
本発明によれば、オープンシールド工法の工程
の一部として支持杭の施工が可能となり、軟弱な
地盤であつてももしくは大断面の地中構造物でも
その底部は杭により支持されるので沈下が防止で
きる。
According to the present invention, it is possible to construct support piles as part of the process of the open shield construction method, and even if the ground is soft or the underground structure has a large cross section, the bottom part is supported by the piles, so subsidence is prevented. It can be prevented.
また、切欠きは末拡がりで底板の後端に開口す
るので、オープンシールド機がカーブを描いて前
進する場合でも杭の位置は切欠き内で左右に動く
余地があり、底板にぶつからずにスムーズにテー
ル部から出て行くことになる。 In addition, the notch widens at the end and opens at the rear end of the bottom plate, so even when the open shield machine moves forward in a curve, the position of the stake has room to move left and right within the notch, allowing it to move smoothly without hitting the bottom plate. It will exit from the tail section.
以下、図面について本発明の実施例を詳細に説
明する。
Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明のオープンシールド工法の１実
施例を示す平断面図で、前記従来例を示す第６
図、第７図と同一構成要素には同一参照符号を付
したものである。 FIG. 1 is a plan sectional view showing one embodiment of the open shield construction method of the present invention, and FIG.
Components that are the same as those in FIG. 1 and FIG. 7 are given the same reference numerals.
先に、本発明工法で使用するオープンシールド
機について説明する。 First, the open shield machine used in the construction method of the present invention will be explained.
第３図〜第５図に示すように、オープンシール
ド機１は、左右の側壁板１ａ，１ｂとこれら側壁
板１ａ，１ｂと同程度の長さでその間を連結する
底板１ｃとからなる前面、後面及び上面を開口し
たＵ型シールド機で、前記側壁板１ａ，１ｂと底
板１ｃの先端を断面三角状の刃口２，２′として
形成し、側壁板１ａ，１ｂの内側に推進ジヤツキ
３を後方に向け上下に並べて配設し、その後端に
押圧部材７を設けることは前記従来例と同じであ
る。 As shown in FIGS. 3 to 5, the open shield machine 1 has a front surface composed of left and right side wall plates 1a, 1b and a bottom plate 1c having the same length as the side wall plates 1a, 1b and connecting them. It is a U-shaped shield machine with openings on the rear and top surfaces, the tips of the side wall plates 1a, 1b and the bottom plate 1c are formed as blade openings 2, 2' having a triangular cross section, and a propulsion jack 3 is installed inside the side wall plates 1a, 1b. It is the same as the prior art example that they are arranged vertically in the rear direction and that the pressing member 7 is provided at the rear end.
本実施例は大断面用の地中構造物を施工する場
合で、オープンシールド機１はそのテール部１ｄ
へ第２図に示すような大断面の地中構造物４の吊
り降しが可能なように全体断面形状が大型のもの
である。 This embodiment is for constructing an underground structure with a large cross section, and the open shield machine 1 has a tail section 1d.
The overall cross-sectional shape is large so that an underground structure 4 having a large cross-section as shown in FIG. 2 can be suspended.
また、前記側壁板１ａ，１ｂ間で形成される前
部開口内を仕切壁８で横方向に区画して複数の開
口９1，９2，９3に分割し、さらにこの仕切壁８
の前端を刃口２と平行に並ぶ刃口１０として形成
した。 Further, the inside of the front opening formed between the side wall plates 1a and 1b is laterally divided by a partition wall 8 into a plurality of openings 9 1 , 9 2 , 9 3 , and further this partition wall 8
The front end of the blade was formed as a cutting edge 10 arranged parallel to the cutting edge 2.
さらに、テール部１ｄの底板１ｃに、後端への
末拡がりの略三角形の切欠き１１を杭打設用開口
として設けた。 Furthermore, a substantially triangular notch 11 that widens toward the rear end is provided in the bottom plate 1c of the tail portion 1d as an opening for driving a pile.
なお、図示は省略するがこの切欠き１１にはコ
ンパネや鉄板等の引き戸式の蓋を設けるようにし
てもよい。 Although not shown, this notch 11 may be provided with a sliding door type lid such as a control panel or an iron plate.
前記推進ジヤツキ３及び押圧部材７は、テール
部１ｄの中央にも設けることもある。 The propulsion jack 3 and the pressing member 7 may also be provided at the center of the tail portion 1d.
次に、かかるオープンシールド機を用いる本発
明のオープンシールド工法について説明する。 Next, the open shield construction method of the present invention using such an open shield machine will be explained.
オープンシールド工法の基本的概要としては前
記従来例と同様であるが、発進坑内にこのオープ
ンシールド機１を設置して、シールト機１の前面
又は上面開口より発進坑の前方の土砂を掘削し、
かつ排土する。そして、シールド機１の推進ジヤ
ツキ３を伸長して発進坑内の反力壁に反力をとつ
てシールド機１を前進させ、コンクリート函体等
による第１番目の地中構造物４を上方から吊り降
し、シールド機１のテール部１ｄ内で縮めた推進
ジヤツキ３の後方にセツトする。 The basic outline of the open shield method is the same as the conventional example, but the open shield machine 1 is installed inside the starting shaft, and the earth and sand in front of the starting shaft is excavated from the front or top opening of the shield machine 1.
And remove soil. Then, the propulsion jack 3 of the shield machine 1 is extended to apply a reaction force to the reaction wall in the launch shaft to advance the shield machine 1, and suspend the first underground structure 4 made of a concrete box or the like from above. It is lowered and set behind the propulsion jack 3, which has been retracted within the tail section 1d of the shield machine 1.
次いで、シヨベル等の掘削機で同様にオープン
シールド機１の前面又は上面から土砂を掘削しか
つ排土してからシールド機１を前進させ、前記第
１番目の地中構造物４の前に第２番目の地中構造
物４をシールド機１のテール部１ｄ内に吊り降
す。以下、同様の掘進及び地中構造物４のセツト
工程を繰返して、順次地中構造物４を縦列に地中
に埋設し、後方の地中構造物４上に埋戻しを施
す。 Next, earth and sand is similarly excavated and removed from the front or upper surface of the open shield machine 1 using an excavator such as a shovel, and then the shield machine 1 is moved forward, and a first underground structure is placed in front of the first underground structure 4. The second underground structure 4 is suspended into the tail portion 1d of the shield machine 1. Thereafter, similar steps of digging and setting the underground structures 4 are repeated to sequentially bury the underground structures 4 in the ground in columns, and backfill the underground structures 4 at the rear.
このようなオープンシールド機１の掘進の際の
掘削は、開口９1，９2，９3に対応して地上にシ
ヨベル等の掘削機を複数並べ、各開口単位で同時
進行で行う。 When the open shield machine 1 excavates, a plurality of excavators such as shovels are lined up on the ground corresponding to the openings 9 1 , 9 2 , and 9 3 , and the excavation is carried out simultaneously for each opening.
さらに、推進ジヤツキ３を伸長してシールド機
１を前進させると、最前列の地中構造物４の下か
ら末拡がりの切欠き１１が先端部分から現れるの
で、この切欠き１１を介して地盤に孔を掘削し、
杭１３を打設する。 Furthermore, when the propulsion jack 3 is extended to move the shield machine 1 forward, a notch 11 that widens toward the bottom appears from the tip of the underground structure 4 in the front row. drill a hole,
Drive the pile 13.
そして、この杭１３の頭部でテール部１ｄ内に
吊り下ろす地中構造物４を支持させる。 Then, the underground structure 4 suspended within the tail portion 1d is supported by the head of the pile 13.
該杭１３は現場造成杭でも既製杭でもよいが、
地中構造物４はブロツク体による高さ調整材１２
で保持するので、この杭１３の杭頭をテール部１
ｄの底板１ｃ上に出すことができ、必要に応じて
地中構造物４の底板とボルト等で結合する。 The pile 13 may be a site-built pile or a ready-made pile, but
The underground structure 4 has a height adjusting member 12 made of blocks.
Since the pile 13 is held by the tail part 1 of the pile 13,
It can be brought out onto the bottom plate 1c of the underground structure 4, and if necessary, it can be connected to the bottom plate of the underground structure 4 with bolts or the like.
さらに、切欠き１１は末拡がりで底板１ｃの後
端に開口するので、オープンシールド機１がカー
ブを描いて前進する場合でも杭１３の位置は切欠
き１１で左右に動く余地があり、底板１ｃにぶつ
からずにスムーズにテール部１ｄ内から出て行く
ことになる。 Furthermore, since the notch 11 opens at the rear end of the bottom plate 1c, even when the open shield machine 1 moves forward in a curve, the position of the stake 13 has room to move left and right in the notch 11, and the bottom plate 1c It will exit smoothly from inside the tail portion 1d without colliding with the object.
また、この切欠き１１にコンパネや鉄板等の引
き戸式の蓋を設けるようにした場合、不用時に切
欠き１１に蓋をして地下水等の流入を防ぐことが
できる。 Further, if this notch 11 is provided with a sliding door type cover such as a control panel or an iron plate, the notch 11 can be covered when not in use to prevent underground water from flowing in.
以上述べたように本発明のオープンシールド工
法は、従来不可能とされた杭の打設を工程の一環
として行うことができ、この杭により軟弱な地盤
であつてももしくは大断面の地中構造物でも地中
構造物の底部を杭により支持して安価に地中構造
物の沈下を防止できるものである。
As described above, the open shield construction method of the present invention enables the driving of piles as part of the process, which was previously considered impossible. It is possible to prevent the underground structure from sinking at low cost by supporting the bottom of the underground structure with piles.
第１図は本発明のオープンシールド工法の１実
施例を示す横断平面図、第２図は大断面の地中構
造物の縦断正面図、第３図は大断面用のオープン
シールド機の横断平面図、第４図は同上正面図、
第５図は同上縦断側面図、第６図はオープンシー
ルド工法の概要を示す縦断側面図、第７図は同上
横断平面図である。
１……オープンシールド機、１ａ，１ｂ……側
壁板、１ｃ……底板、１ｄ……テール部、２，
２′……刃口、３……推進ジヤツキ、４……地中
構造物、５……埋戻し、６……掘削機、７……押
圧部材、８……仕切壁、９1，９2，９3……開口、
１０……刃口、１１……切欠き、１２……高さ調
整材、１３……杭。
Figure 1 is a cross-sectional plan view showing one embodiment of the open shield construction method of the present invention, Figure 2 is a longitudinal front view of an underground structure with a large cross section, and Figure 3 is a cross-sectional plane view of an open shield machine for large cross sections. Figure 4 is a front view of the same as above;
FIG. 5 is a vertical side view of the same as above, FIG. 6 is a vertical side view showing an overview of the open shield construction method, and FIG. 7 is a cross-sectional plan view of the same. 1...Open shield machine, 1a, 1b...Side wall plate, 1c...Bottom plate, 1d...Tail part, 2,
2'... Blade mouth, 3... Propulsion jack, 4... Underground structure, 5... Backfill, 6... Excavator, 7... Pressing member, 8... Partition wall, 9 1 , 9 2 ,9 3 ...Aperture,
10...Blade mouth, 11...Notch, 12...Height adjustment material, 13...Pile.
Claims (1)
前面、後面及び上面を開口したオープンシールド
機の前面又は上面開口より前方の土砂を掘削排土
し、推進ジヤツキを伸長してコンクリート函体等
による既設地中構造物を反力にしてシールド機を
前進させ、シールド機のテール部内で縮めた推進
ジヤツキの後方に新たな地中構造物を上方から吊
り降し、次いで、シヨベル等の掘削機で同様にオ
ープンシールド機の前面又は上面から土砂を掘削
排土してからシールド機を前進させ、かかる工程
を繰り返して順次地中構造物を縦列に埋設するオ
ープンシールド工法において、 オープンシールド機はそのテール部へ大断面の
地中構造物の吊り降しが可能なように全体断面形
状が大型のものであり、テール部底板に後端へ末
拡がり形状で開口する略三角形の切欠きを形成
し、また、前記側壁板間で形成される前部開口内
を仕切壁で横方向に区画して複数の開口に分散
し、さらにこの仕切壁の前端を刃口と平行に並ぶ
刃口とし、 このようなオープンシールド機の掘進の際の掘
削は、前記各前部開口に対応して地上にシヨベル
等の掘削機を複数並べ、各開口単位で同時進行で
行い、さらに、推進ジヤツキを伸長してシールド
機を前進させると、最前列の地中構造物の下から
該切欠きが現れるので、この切欠きの先頭部を介
して孔を掘削して杭を打設し、この杭の頭部でテ
ール部に新たに吊り下ろす地中構造物を支持させ
ることを特徴としたオープンシールド工法。[Claims] 1. A propulsion jack is disposed inside the left and right side wall plates,
The earth and sand in front of the front or top opening of the open shield machine, which has openings on the front, rear, and top sides, is excavated and removed, the propulsion jack is extended, and the existing underground structure such as a concrete box is used as a reaction force to operate the shield machine. A new underground structure is suspended from above behind the propulsion jack that is moved forward and retracted within the tail of the shield machine, and then soil is similarly excavated from the front or top surface of the open shield machine using an excavator such as a shovel. In the open shield construction method, the shield machine moves forward after removing the soil and repeats this process to bury underground structures in tandem.The open shield machine suspends large cross-section underground structures from its tail. The overall cross-sectional shape is large so as to allow for a wide cross-section, and a substantially triangular notch is formed in the bottom plate of the tail portion that opens in a shape that widens toward the rear end, and a front opening is formed between the side wall plates. The interior is laterally partitioned by a partition wall and distributed into a plurality of openings, and the front end of this partition wall is made into a cutting hole aligned parallel to the cutting hole. Multiple excavators such as shovels are lined up on the ground corresponding to each front opening, and excavators such as shovels are operated simultaneously for each opening.Furthermore, when the propulsion jack is extended and the shield machine is advanced, the underground structure in the front row is The notch will appear from below, so a hole will be drilled through the top of this notch and a pile will be driven in, and the head of this pile will support the newly suspended underground structure from the tail. The open shield construction method is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1344443A JPH03199524A (en) | 1989-12-27 | 1989-12-27 | Open shield construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1344443A JPH03199524A (en) | 1989-12-27 | 1989-12-27 | Open shield construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03199524A JPH03199524A (en) | 1991-08-30 |
| JPH0553891B2 true JPH0553891B2 (en) | 1993-08-11 |
Family
ID=18369307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1344443A Granted JPH03199524A (en) | 1989-12-27 | 1989-12-27 | Open shield construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03199524A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833637A (en) * | 1971-09-02 | 1973-05-11 |
-
1989
- 1989-12-27 JP JP1344443A patent/JPH03199524A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833637A (en) * | 1971-09-02 | 1973-05-11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03199524A (en) | 1991-08-30 |
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