JPH02147794A - Earth-pressure shield tunneling method using foaming solid body - Google Patents
Earth-pressure shield tunneling method using foaming solid bodyInfo
- Publication number
- JPH02147794A JPH02147794A JP63303339A JP30333988A JPH02147794A JP H02147794 A JPH02147794 A JP H02147794A JP 63303339 A JP63303339 A JP 63303339A JP 30333988 A JP30333988 A JP 30333988A JP H02147794 A JPH02147794 A JP H02147794A
- Authority
- JP
- Japan
- Prior art keywords
- earth pressure
- earth
- excavation
- solid body
- pressure shield
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007787 solid Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 17
- 238000005187 foaming Methods 0.000 title abstract description 7
- 230000005641 tunneling Effects 0.000 title abstract 4
- 238000009412 basement excavation Methods 0.000 claims abstract description 36
- 239000000654 additive Substances 0.000 claims abstract description 15
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 14
- 239000002893 slag Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 239000011343 solid material Substances 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 229920006327 polystyrene foam Polymers 0.000 claims description 2
- 239000002562 thickening agent Substances 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000002689 soil Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 229910000278 bentonite Inorganic materials 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011798 excavation material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0678—Adding additives, e.g. chemical compositions, to the slurry or the cuttings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0678—Adding additives, e.g. chemical compositions, to the slurry or the cuttings
- E21D9/0685—Foaming agents
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、発泡固形体を使用した土圧シールド掘進方
法、特に砂質あるいは砂礫のような地盤でかつ湧水の多
い切羽における掘削に適した土圧シールド掘進方法に関
するものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention is an earth pressure shield excavation method using a foamed solid material, and is particularly suitable for excavation in sandy or gravelly ground and at a face with a lot of spring water. This paper relates to an earth pressure shield excavation method.
従来の土圧シールド掘進方法としては、一般に、カッタ
ーヘッドと隔壁との間のチャンバー内に回転駆動できる
スクリューコンベヤの先端を挿入し、カッターヘッドか
らスクリューコンベヤの排土口まで掘削ずりを充満させ
つつ、外部へ排出するタイプの土圧シールド掘進機を使
用して掘進が行なわれている。In the conventional earth pressure shield excavation method, the tip of a screw conveyor that can be rotated is inserted into the chamber between the cutter head and the bulkhead, and the excavated waste is filled from the cutter head to the screw conveyor's discharge port. Excavation is carried out using a type of earth pressure shield excavator that discharges to the outside.
しかし、特に滞水した砂質地盤あるいは砂礫地盤を掘進
する場合、切羽の掘削から排土にいたる工程の中で機械
的な制御だけでは、チャンバースクリューコンベヤ内の
止水効果は期待できず、水の流出により切羽の崩壊がお
こり、またそれを防止する為、排土口にパルプ等を取り
つけて地下水を制御しようとすると、土圧室内にアーチ
ング現象が生じて排土不能となり、カッターヘッドのト
ルク不足を来たすなどの問題があった。However, especially when excavating water-logged sandy or gravelly ground, mechanical control alone during the process from excavation of the face to earth removal cannot be expected to have a water-stopping effect within the chamber screw conveyor. In order to prevent this, an attempt was made to control groundwater by attaching pulp, etc. to the soil discharge port, but an arching phenomenon occurred in the earth pressure chamber, making soil discharge impossible, and the torque of the cutter head was reduced. There were problems such as shortages.
このような問題点を改善する為、従来より、ベントナイ
ト、高吸水性樹脂及び同吸水助剤、起泡剤を含む液体を
発泡させることによって生ずる気泡を掘削すりに吹きつ
け、砂質土あるいは砂礫の掘削ずりの流動性を図ると同
時に止水性を高める方法がとられていた。In order to improve these problems, conventional methods have been used to blow air bubbles generated by foaming a liquid containing bentonite, a superabsorbent resin, the same water absorption aid, and a foaming agent onto an excavation rail to remove sandy soil or gravel. Methods were used to improve the fluidity of excavated slag and at the same time to improve water-stopping properties.
ところで、ベントナイトは、粘土鉱物であるモンモリロ
ナイトが主成分であり、界面活性力が大きく、膨潤性、
潤滑性に優れているがアルカリ性がＰＨ＝１１〜１２と
極めて高い為、掘削ずりの処理施設が必要となることが
多かった。By the way, bentonite is mainly composed of montmorillonite, which is a clay mineral, and has a large surfactant power, swelling property, and
Although it has excellent lubricity, its alkalinity is extremely high at PH = 11 to 12, so facilities for processing excavation debris are often required.
また、高吸水性樹脂は、溶剤に溶かして切羽に注入し、
その高吸水性により球状にすることで、掘削ずりを流動
化させようとするものであるが、溶剤にカチオンがある
と樹脂自体が劣化しやす（、日照に弱いなどの欠点があ
る。また、材料費としても高く、湧水が多ければ経済性
が伴わないことが多かった。In addition, super absorbent resin is dissolved in a solvent and injected into the face.
It is intended to fluidize excavated slag by making it into a spherical shape due to its high water absorption, but if the solvent contains cations, the resin itself tends to deteriorate (and has drawbacks such as being sensitive to sunlight. The cost of materials was high, and if there was a lot of spring water, it was often not economical.
更に、起泡剤を含む液体を発泡させて、切羽に注入する
方法は、気泡の混入した掘削ずりから消泡剤を添加して
脱気しなければならず、その為土質によってはその脱気
の為に消泡剤の使用量が多くなったり、特別な処理施設
が必要となり、経済性が伴わないことが多かった。Furthermore, in the method of foaming a liquid containing a foaming agent and injecting it into the face, it is necessary to add an antifoaming agent to degas the excavated debris containing air bubbles, so depending on the soil type, the degassing may be difficult. Therefore, the amount of antifoaming agent used increases and special treatment facilities are required, which is often not economical.
この発明の課題は、土圧シールド掘進方法における上記
の問題点を解決すべく、切羽及び土圧室内に発泡固形体
と掘進用添加剤の混合体を供給することにより、切羽粒
度を改善し、切羽水圧に対する止水性を高め、切羽の安
定化をはかると共に、掘削ずりの塑性流動化を促進し、
アーチング現象をなくして、カンタ−トルク及びシール
ドジヤツキの推力を軽減し、円滑な排土が行なえる発泡
固形体を使用した土圧シールド掘進方法を提供すること
にある。An object of the present invention is to improve the particle size of the face by supplying a mixture of foamed solids and excavation additives into the face and the earth pressure chamber, in order to solve the above-mentioned problems in the earth pressure shield excavation method. It improves water-stop performance against water pressure at the face, stabilizes the face, and promotes plastic fluidization of excavated shear.
To provide an earth pressure shield excavation method using a foamed solid body, which eliminates arching phenomenon, reduces canter torque and thrust of a shield jack, and enables smooth earth removal.
上記のような課題を解決するため、この発明は、土圧シ
ールドの掘進方法において、土圧シールド掘進機による
切羽掘削部分及び土圧室内に取り込まれた掘削ずりの中
に各々発泡固形体と掘進用添加剤との混合材を供給し、
土庄室内から取り出した掘削ずりから発泡固形体を分離
するようにしたものである。In order to solve the above-mentioned problems, the present invention provides an earth pressure shield excavation method in which a foamed solid material and excavation material are added to the face excavation portion by the earth pressure shield excavation machine and the excavation shear taken into the earth pressure chamber. Supplying mixed materials with additives for
The foamed solid material is separated from the excavated slag taken out from inside the Tonosho chamber.
シールド掘進機による掘削時において、切羽掘削部分に
発泡固形体と掘進用添加剤との混合材を供給すると、切
羽粒度を改善し、切羽水圧に対する止水性を向上させる
と共に、切羽の安定化をはかることができる。When excavating with a shield excavator, supplying a mixture of foamed solids and excavation additives to the excavated part of the face improves the particle size of the face, improves water sealing performance against water pressure at the face, and stabilizes the face. be able to.
また、土圧室内に供給した前記混合体は、掘削ずりの塑
性流動化を促進し、円滑な排土を可能にする。Furthermore, the mixture supplied into the earth pressure chamber promotes plastic fluidization of excavated debris and enables smooth earth removal.
以下、この発明の実施例を添付図面に基づいて説明する
。Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図及び第２図において、１は土圧シールド掘進機、
２は当該土圧シールド掘進機１の先端部に設けられたカ
ッターヘッドである。上記カンタ−へフド２は、シール
３と回転台４及び回転台軸受５を介して掘進機本体１ａ
により支持され、伝達機構６を介して駆動モーター７で
回転が与えられる。In Figures 1 and 2, 1 is an earth pressure shield excavator;
2 is a cutter head provided at the tip of the earth pressure shield excavator 1. The canter head 2 is connected to the excavator main body 1a via a seal 3, a rotary table 4, and a rotary table bearing 5.
Rotation is applied by a drive motor 7 via a transmission mechanism 6.
掘進機本体１ａ内でカッターヘッド２の後方には隔壁８
が設けられ、上記カンタ−ヘッド２と隔壁８の間に土圧
室９が形成され、カンタ−ヘッド２の背面部には土庄室
９内に掘削ずりをかき上げるかき上げ板１０が取付けら
れている。There is a bulkhead 8 behind the cutter head 2 inside the excavator main body 1a.
An earth pressure chamber 9 is formed between the canter head 2 and the bulkhead 8, and a scraping plate 10 is attached to the back of the canter head 2 to scrape up excavated debris in the earth pressure chamber 9. There is.
１１はスクリューコンベヤであり、筒状ケーシングｌｌ
ａ内に収納したスクリュー１２が駆動モータ１３によっ
て回転駆動されると共に、当該スクリューコンベヤ１１
の先端開口は隔壁８を貫通して土圧室９に挿入され、土
圧室９内の掘削ずりを開口部から取込んで搬出されるよ
うになっている。11 is a screw conveyor, which has a cylindrical casing ll
The screw 12 housed in a is rotationally driven by a drive motor 13, and the screw conveyor 11
The opening at the tip thereof is inserted into the earth pressure chamber 9 through the partition wall 8, and the excavated debris in the earth pressure chamber 9 is taken in through the opening and carried out.
前記スクリューコンベヤ１１のケーシング１１ａには、
油圧ジヤツキ１４によって任意の位置に停止する機構を
有し、当該スクリューコンベヤ１１によって搬出される
掘削ずりの排土量を調整するためのゲート１５がある。The casing 11a of the screw conveyor 11 includes:
It has a mechanism for stopping at an arbitrary position using a hydraulic jack 14, and a gate 15 for adjusting the amount of excavated dirt carried out by the screw conveyor 11.
１６は掘削ずりを搬出するベルトコンベヤ、１７はセグ
メント、１８はシールド推進ジヤツキである。16 is a belt conveyor for transporting excavated debris, 17 is a segment, and 18 is a shield propulsion jack.
また、前記カンタ−へラド２には数条のスポーク２２と
このスポーク２２に固定されたフェースプレート２３及
び複数個のカンタ−ピント２１が取り付けられ、フェー
スプレート２３には掘削ずりを取り込むためのスリット
２９が設けられている。Further, several spokes 22, a face plate 23 fixed to the spokes 22, and a plurality of canter pins 21 are attached to the canter head 2, and the face plate 23 has a slit for taking in excavated debris. 29 are provided.
２４は、この発明の掘進方法に使用する発泡固形体と掘
進用添加剤の混合材を入れておく貯留タンク、２５は混
合材を任意量供給できるコンプレッサー、２６．２６′
は混合材を送る為の圧送管であり、上記圧送管２６．２
６′は切羽面及び土圧室９に向けて複数個のノズル２０
．２０′及び１９がある。24 is a storage tank containing a mixture of foamed solid material and excavation additive used in the excavation method of the present invention; 25 is a compressor capable of supplying any amount of the mixture; 26.26'
is a pressure feed pipe for sending the mixed material, and the above pressure feed pipe 26.2
6' is a plurality of nozzles 20 directed toward the face surface and the earth pressure chamber 9.
．． There are 20' and 19.
当該貯留タンク２４には、発泡固形体と掘進用添加剤が
分離しないように撹拌翼を設けている。The storage tank 24 is provided with stirring blades so that the foamed solid body and the excavation additive do not separate.
２７はボールジツイント、２８はユニバーサルジヨイン
トである。27 is a ball joint, and 28 is a universal joint.
前記発泡固形体は例えばポリスチレン系の発泡体を用い
て球粒状に形成され、掘進用添加剤としては粘度、増粘
剤、高吸水樹脂系材料を例示することができ、発泡固形
体の球径及び掘進用添加剤との混合量は土質に合わせて
任意に選択すればよい。The foamed solid body is formed into a spherical shape using, for example, polystyrene foam, and examples of additives for digging include viscosity, thickeners, and super absorbent resin materials, and the spherical diameter of the foamed solid body is The mixing amount of the additive and the digging additive may be arbitrarily selected depending on the soil quality.
次に、シールド掘進の方法を添付図面に従って説明する
。Next, a method of shield excavation will be explained with reference to the attached drawings.
土圧シールド掘進機１は当該土圧シールド掘進ｌ１１１
の内部で組立てられたセグメント１７に反力をとり、当
該土圧シールド掘進機１に固定されたシールドジヤツキ
１８により切羽側に推進される。The earth pressure shield excavator 1 excavates the earth pressure shield l111.
A reaction force is applied to the segment 17 assembled inside the earth pressure shield excavator 1, and the shield jack 18 fixed to the earth pressure shield excavator 1 propels it toward the face side.
それと同時に貯留タンク２４に予め貯えられた発泡固形
体と掘進用添加剤の混合材をコンプレッサー２５からの
空気圧によって圧送管２６．２６′を通じて回転駆動中
のカッターヘッド２内のノズル２０．２０′及びノズル
１９に圧送され、ノズル２０．２０′及びノズル１９の
先端より切羽面及び土圧室９に注入される。At the same time, a mixture of foamed solids and drilling additives previously stored in the storage tank 24 is fed to the nozzle 20, 20' in the cutter head 2, which is being rotated through the pressure feed pipe 26, 26' by the air pressure from the compressor 25. It is fed under pressure to the nozzle 19 and injected into the face surface and the earth pressure chamber 9 from the nozzle 20, 20' and the tip of the nozzle 19.
カッターヘッド２によって掘削されたすりは混合材と共
にスリット２９から土圧室９内へ取り込まれ、土圧室９
内では、カッターへラド２とともに回転駆動するかき上
げ板１０によって掘削ずりと混合材が混合撹拌され、流
動性、圧縮性及び止水性に冨んだ掘削ずりが出来上がる
。The pickpocket excavated by the cutter head 2 is taken into the earth pressure chamber 9 through the slit 29 together with the mixed material.
Inside, the excavated slag and the mixed material are mixed and agitated by a scraping plate 10 which is driven to rotate together with the cutter lad 2, thereby creating an excavated slag rich in fluidity, compressibility and water-stopping properties.
したがって、土圧室９及びスクリューコンベヤ１１内に
充満した混合材をおびた掘削ずりが、その土庄によって
切羽土圧及び地下水圧に対抗しなから土圧室９内からス
クリューコンベヤ１１の開口部へ搬出される。油圧ジヤ
ツキ１４の操作によってゲート１５の開口割合を調節し
ながら、スクリューコンベヤ１１から混合材をおびた掘
削ずりを排出させ、ベルトコンベヤ１６にて分離装置（
発泡固形体と掘削ずりとの分離装置、図示せず）を通し
て、あるいは、前記の分離装置を通さないでずリトロフ
コ（図示せず）で運搬して、坑外に搬出される。Therefore, the excavated shear filled with the mixed material filling the earth pressure chamber 9 and the screw conveyor 11 is directed from the earth pressure chamber 9 to the opening of the screw conveyor 11 without resisting the face earth pressure and groundwater pressure by the earth pressure chamber 9 and the screw conveyor 11. It will be carried out. While adjusting the opening ratio of the gate 15 by operating the hydraulic jack 14, the excavated waste containing the mixed material is discharged from the screw conveyor 11, and transferred to the belt conveyor 16 by the separation device (
The foam solids are transported outside the mine through a separation device (not shown) for separating the foamed solid from the drilling slag, or through a litrovco (not shown) without passing through the separation device.
そして、前記分離装置を通さなかった、混合材をおびた
掘削すりは、坑外において分離装置にかけられ、発泡固
形体と掘削すりに分離され、回収した発泡固形体は再使
用されることになる。Then, the drilling sludge covered with the mixed material that did not pass through the separator is passed through a separator outside the mine to be separated into foamed solids and drilling sludge, and the recovered foamed solids are reused. .
以上のように、この発明によると、土圧シールド掘進機
のカッターヘッド前面の切羽に発泡固形体と掘進用添加
剤との混合材を供給するようにしたので、カッターヘッ
ドと切羽面との摩擦を軽減し、カンタ−トルクの減少を
計ると共に、カンタ−ビットの損耗を遅延させる効果が
ある。As described above, according to the present invention, a mixture of foamed solid material and excavation additive is supplied to the face on the front side of the cutter head of the earth pressure shield excavator, so that the friction between the cutter head and the face is reduced. This has the effect of reducing canter torque and delaying wear of the canter bit.
また、土圧室内への混合材の供給により、流動性、圧縮
性及び止水性に富んだ発泡固形体と掘進用添加剤との混
合材をおびた掘削ずりを作り出して、その上圧により切
羽の土圧及び切羽水圧に対抗して切羽面を安定させると
共に、土圧室内でのアーチング現象を防ぎ、混合材をお
びた掘削ずりがスクリューコンベヤ内をスムーズに流れ
能率よく排出される。In addition, by supplying the mixed material into the earth pressure chamber, an excavation shear containing a mixture of foamed solid material with high fluidity, compressibility, and water-stopping properties and excavation additives is created, and the upper pressure is applied to the face. This stabilizes the face surface against the earth pressure and water pressure of the face, prevents arching within the earth pressure chamber, and allows the excavated waste covered with the mixed material to flow smoothly through the screw conveyor and be efficiently discharged.
更に、掘削ずり中の発泡固形体は水の注入及び振動を与
える事により簡単に分離されるので再利用が可能であり
、経済的な施工ができ、従来のように多量のベントナイ
ト及びその他の作泥材を使用した掘削ずりの一次、二次
処理や気泡を使用した掘削ずりの特別な脱気処理が必要
でない。Furthermore, the foam solids in the excavation ditch can be easily separated by water injection and vibration, allowing for reuse, economical construction, and eliminating the need for large amounts of bentonite and other materials as in the past. There is no need for primary or secondary treatment of excavation slag using mud material or special deaeration treatment of excavation slag using air bubbles.
第１図は、この発明の方法を実施する土圧シールド掘進
機の一例を示す断面図、第２図は、その上圧シールド掘
進機の正面である。
１・・・・・・土圧シールド掘進機、
２・・・・・・カッターへ、ド、
７・・・・・・カッターヘッド回転駆動モーター８・・
・・・・隔壁、 Ｓ・・・・・・土圧室、１０
・・・・・・かき上げ板、
１１・・・・・・スクリューコンベヤ、１３・・・・・
・スクリューコンベヤ回転駆動モーター１５・・・・・
・排土用ゲート、１６・・・・・・ベルトコンベヤ、１
９．２０．２０′・・・・・・ノズル、２４・・・・・
・貯留タンク、 ２５・・・・・・コンプレッサー２６
．２６′・・・・・・圧送管。FIG. 1 is a sectional view showing an example of an earth pressure shield excavator that implements the method of the present invention, and FIG. 2 is a front view of the upper pressure shield excavator. 1...Earth pressure shield excavator, 2...To cutter, 7...Cutter head rotation drive motor 8...
... Bulkhead, S ... Earth pressure chamber, 10
...Screwing board, 11...Screw conveyor, 13...
・Screw conveyor rotation drive motor 15...
・Earth removal gate, 16...Belt conveyor, 1
9.20.20'... Nozzle, 24...
・Storage tank, 25...Compressor 26
．． 26'... Pressure feed pipe.
Claims (3)
掘進機による切羽掘削部分及び土圧室内に取り込まれた
掘削ずりの中に各々発泡固形体と掘進用添加剤との混合
材を供給し、土圧室内から取り出した掘削ずりから発泡
固形体を分離することを特徴とする発泡固形体を使用し
た土圧シールド掘進方法。(1) In the earth pressure shield excavation method, a mixture of a foam solid and an excavation additive is supplied into the face excavation part by the earth pressure shield excavator and the excavation slag taken into the earth pressure chamber, respectively, An earth pressure shield excavation method using a foamed solid material, characterized in that the foamed solid material is separated from excavation slag taken out from an earth pressure chamber.
求項１に記載の発泡固形体を使用した土圧シールド掘進
方法。(2) An earth pressure shield excavation method using a foamed solid body according to claim 1, wherein the foamed solid body is made of a polystyrene foam.
料からなる請求項１に記載の発泡固形体を使用した土圧
シールド掘進方法。(3) The earth pressure shield excavation method using a foamed solid body according to claim 1, wherein the excavation additive comprises clay, a thickener, and a super absorbent resin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63303339A JPH0631547B2 (en) | 1988-11-29 | 1988-11-29 | Earth pressure shield excavation method using foam solid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63303339A JPH0631547B2 (en) | 1988-11-29 | 1988-11-29 | Earth pressure shield excavation method using foam solid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02147794A true JPH02147794A (en) | 1990-06-06 |
| JPH0631547B2 JPH0631547B2 (en) | 1994-04-27 |
Family
ID=17919782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63303339A Expired - Lifetime JPH0631547B2 (en) | 1988-11-29 | 1988-11-29 | Earth pressure shield excavation method using foam solid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631547B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400691A (en) * | 2011-12-31 | 2012-04-04 | 上海市机械施工有限公司 | Technical method for reinforcing spiral blade of spiral conveyer of earth pressure balance shield machine in sandy soil layer |
| CN104695969A (en) * | 2015-02-28 | 2015-06-10 | 广东华隧建设股份有限公司 | Method for switching slurry tunneling mode to earth pressure tunneling mode of shield tunneling machine |
-
1988
- 1988-11-29 JP JP63303339A patent/JPH0631547B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400691A (en) * | 2011-12-31 | 2012-04-04 | 上海市机械施工有限公司 | Technical method for reinforcing spiral blade of spiral conveyer of earth pressure balance shield machine in sandy soil layer |
| CN104695969A (en) * | 2015-02-28 | 2015-06-10 | 广东华隧建设股份有限公司 | Method for switching slurry tunneling mode to earth pressure tunneling mode of shield tunneling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0631547B2 (en) | 1994-04-27 |
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