JPH0663434B2 - Method of injecting different backfill material when constructing curved part by shield method - Google Patents
Method of injecting different backfill material when constructing curved part by shield methodInfo
- Publication number
- JPH0663434B2 JPH0663434B2 JP1257065A JP25706589A JPH0663434B2 JP H0663434 B2 JPH0663434 B2 JP H0663434B2 JP 1257065 A JP1257065 A JP 1257065A JP 25706589 A JP25706589 A JP 25706589A JP H0663434 B2 JPH0663434 B2 JP H0663434B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- shield machine
- shield
- backfill
- ground
- 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 - Fee Related
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はシールド工法による曲線施工時の異種裏込注入
材の注入方法に係るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a method for injecting a backfill material of different kinds during curved construction by a shield construction method.
（従来の技術） 従来この種の工法においては、シールド機のテール部後
方より地山に押し出されたセグメントより裏込注入材を
注入するのが普通である。(Prior Art) Conventionally, in this type of construction method, it is usual to inject the backfill material from the segment extruded into the ground from the rear of the tail portion of the shield machine.
（発明が解決しようとする課題） シールド工法においては、直線部の施工では裏込注入材
注入の遅れによる地山の崩壊はないが、余掘りを必要と
する曲線部の施工においては、裏込注入材の注入の遅れ
が地山崩壊の大きな要因となる。(Problems to be solved by the invention) In the shield construction method, there is no collapse of the ground due to the delay of injection of the backfill injection material in the construction of the straight line portion, but in the construction of the curved portion that requires overcutting, the backfill Delay of injection of injection material is a major cause of rock mass collapse.
地山崩壊による必要余掘り量の確保ができなくなると、
設計曲線の施工が難しくなり、シールド機に無理な力が
加わり、円滑な施工ができなくなる。If it becomes impossible to secure the necessary amount of excess digging due to the ground collapse,
Construction of the design curve becomes difficult, and unreasonable force is applied to the shield machine, making smooth construction impossible.
本発明は、前記従来技術の有する問題点を解決するため
に提案されたもので、その目的とする処はシールド工法
による曲線部施工時において裏込注入材の注入の遅れが
なく、地山崩壊の発生を防止しうる異種裏込注入材の注
入方法を提供する点にある。The present invention has been proposed in order to solve the problems of the above-mentioned prior art, and the purpose thereof is that there is no delay in the injection of the backfill injection material during the construction of the curved portion by the shield construction method, and the ground collapses. Another object of the present invention is to provide a method for injecting a different type of backfill injection material, which can prevent the occurrence of
（課題を解決するための手段） 前記の目的を達成するため、本発明に係るシールド工法
による曲線部施工時の異種裏込注入材の注入方法は、シ
ールド工法による曲線部の施工において、シールド機外
周面と地山掘削面との間の空隙部に、固結することな
く、且つ流動性を有する発泡ビーズを主材とした裏込注
入材を注入する１次注入とシールド機の掘進後にシール
ド機テール部より後方に押し出されたセグメントの外周
面と地山掘削面との間の１次注入後の空隙部にセメント
を主材とする裏込注入材を注入する２次注入とを行なう
ように構成されている。(Means for Solving the Problems) In order to achieve the above-mentioned object, a method of injecting a different backfilling injection material at the time of constructing a curved portion by the shield construction method according to the present invention is a shield machine in construction of a curved portion by the shield construction method. A primary injection that injects a back-filling injection material whose main material is a foamed bead that does not solidify and has fluidity into the space between the outer peripheral surface and the rock excavation surface Perform secondary injection to inject back-injection material with cement as the main material into the void after primary injection between the outer peripheral surface of the segment extruded rearward from the machine tail and the ground excavation surface Is configured.
前記１次注入工程における裏込注入材は発泡ビーズより
構成されるのである。The back-filling injection material in the primary injection step is composed of foam beads.
（作用） 本発明によれば前記したように、シールド工法による曲
線部の施工時、シールド機によって余掘りをしながら掘
進する際、シールド機外周面と地山掘削面との間に生起
した空隙部に、シールド機内より固結することがなく、
且つ流動性を有する発泡ビーズを主材とした裏込注入材
を１次注入することによって、裏込注入材の注入の遅れ
がなく、掘削地山の崩壊が防止されるとともに、同１次
注入による裏込注入材によって地山とシールド機との間
の摩擦が低減される。更に同裏込注入材が流動性に富ん
でいることにより、シールド機の制御が容易に行なわれ
る。(Operation) According to the present invention, as described above, when constructing a curved portion by the shield construction method, when excavating while overdigging with a shield machine, a gap generated between the outer peripheral surface of the shield machine and the ground excavation surface In the part, there is no solidification than in the shield machine,
In addition, the primary injection of the backfill injection material, which is mainly made of foamed beads having fluidity, does not delay the injection of the backfill injection material, prevents collapse of the excavated ground, and performs the primary injection. The friction between the ground and the shield machine is reduced by the back-filling injection material. Further, since the backfill injection material is highly fluid, the shield machine can be easily controlled.
そしてまたシールド機による掘進後に前記１次注入に追
加して、シールド機テール部より後方に押出されたセグ
メントの外周面と地山掘削面との間の１次注入後の空隙
にセグメント内からセメントを主材とする裏込注入材を
注入することによって、同セグメントがシールド機によ
る掘削孔内壁に確固と定着され、かくしてシールド機に
よる曲線部の施工が円滑且つ確実に行なわれる。In addition, after the excavation by the shield machine, the cement is added from the inside of the segment into the void after the primary injection between the outer peripheral surface of the segment extruded rearward from the tail portion of the shield machine and the ground excavation surface, in addition to the primary injection. By injecting the back-filling injection material containing as the main material, the segment is firmly fixed to the inner wall of the excavation hole by the shield machine, and thus the curved portion can be smoothly and reliably constructed by the shield machine.
（実施例） 以下本発明を図面の実施例について説明する。(Examples) The present invention will be described below with reference to the examples of the drawings.
（１）は中折式シールド機で、曲線施工時、余堀りをし
ながら計画路線（２）に沿って掘進する。(1) is a mid-folding type shield machine, which excavates along the planned route (2) while making an overditch when constructing a curve.
前記シールド機（１）によって掘進しながら、シールド
機（１）内部より１次注入配管（３）を介して、同シー
ルド機（１）外周面と地山掘削面（４）との間に、固結
することがなく、且つ流動性を有する発泡ビーズを主材
とした１次裏込注入材（５）を注入すると同時に、シー
ルド機の掘進によりシールド機（１）テール部の後方に
押出されたセグメント（６）より、２次注入配管（７）
を介して、同セグメント（６）の外周面と地山掘削面
（４）との間の１次注入後の空隙にセメントを主材とす
る２次裏込注入材（８）を注入する。While excavating by the shield machine (1), through the primary injection pipe (3) from the inside of the shield machine (1), between the outer peripheral surface of the shield machine (1) and the rock excavation surface (4), At the same time as injecting the primary back-filling injection material (5) whose main material is foam beads that do not solidify and have fluidity, it is extruded to the rear of the tail part of the shield machine (1) by excavation of the shield machine. Secondary injection pipe (7) from the segment (6)
A secondary backfill injection material (8) containing cement as a main material is injected into the space between the outer peripheral surface of the segment (6) and the ground excavation surface (4) after the primary injection via the.
図中（９）はテールパッキン、（10）は裏込止めパッキ
ンである。In the figure, (9) is a tail packing, and (10) is a back-entry packing.
このように前記実施例の方法によれば、シールド機
（１）による曲線部の施工時、余掘り部での裏込注入に
際して、シールド機（１）内からの１次注入と、同シー
ルド機（１）のテール部後方から押出されたセグメント
（６）内からの２次注入とを追加して同時に行ない、注
入の遅れによる地山の崩壊を防止し、必要余掘り量を確
保し、安全且つ円滑に曲線部の１次覆工を行なうもので
ある。As described above, according to the method of the above-described embodiment, the primary injection from the inside of the shield machine (1) and the shield machine (1) at the time of construction of the curved portion by the shield machine (1) and the backfill injection at the overditch portion Secondary injection from the inside of the segment (6) extruded from the rear of the tail of (1) is added and performed at the same time to prevent the collapse of the ground due to the delay of injection, to secure the necessary amount of excess digging, and to ensure safety. In addition, the primary lining of the curved portion is smoothly performed.
なお前記１次裏込注入材（５）としては発泡スチロール
の発泡粒体状の発泡ビーズ（6mm径乃至26mm径）を主材
とし、ベントナイトを助材として使用するが主材のみの
使用も可能である。As the primary backfilling material (5), expanded beads of expanded polystyrene (6 mm diameter to 26 mm diameter) are used as the main material, and bentonite is used as an auxiliary material, but it is also possible to use only the main material. is there.
なお発泡ビーズの径は施工箇所の土質特性、余掘り量、
その他によって決定される。The diameter of the expanded beads depends on the soil characteristics of the construction site, the amount of overburden,
Determined by others.
このように１次裏込注入材（５）の主材として発泡ビー
ズを使用したのは、シールド機の掘進に際し、同機の通
過時に抵抗しないように流動性を有し、且つ潰れ易いこ
とと、空隙部の充填材としての機能を有することによる
ものである。In this way, the use of the foam beads as the main material of the primary backfilling material (5) has fluidity so as not to resist when the shield machine passes through, and is easily crushed. This is because it has a function as a filler for the voids.
（発明の効果） 本発明によれば前記したように、シールド工法による曲
線部の施工において、シールド機外周面と地山掘削面と
の間の空隙部に、固結することなく、且つ流動性を有す
る発泡ビーズを主材とした裏込注入材を注入するシール
ド機内からの１次注入と、シールド機のテール部より後
方に押し出されたセグメントの外周面と地山掘削面との
間の１次注入後の空隙にセメントを主材とする裏込注入
材を注入するセグメント内からの２次注入とを行なうこ
とによって、注入材の注入の遅れによる地山の崩壊を防
止し、必要余堀り量を確保し、曲線部における一次覆工
を安全且つ円滑に施工しうるものである。(Effects of the Invention) According to the present invention, as described above, in the construction of the curved portion by the shield construction method, in the void portion between the outer peripheral surface of the shield machine and the ground excavation surface, there is no solidification and fluidity. Between the outer peripheral surface of the segment extruded rearward from the tail part of the shield machine and the ground excavation surface, and the primary injection from the inside of the shield machine that injects the backfill injection material mainly composed of foam beads having By performing the secondary injection from the inside of the segment that injects the backfill injection material mainly composed of cement into the void after the secondary injection, it is possible to prevent the ground from collapsing due to the delay of injection of the injection material, and to make a necessary extra trench It is possible to secure a sufficient amount and to safely and smoothly perform the primary lining on the curved portion.
また前記シールド機外周面と地山掘削面との間の空隙部
に、固結することがなく、且つ流動性を有する１次裏込
注入材を注入したことによって、シールド機と地山との
摩擦を低減することができ、更に前記１次裏込注入材が
流動性に富んでいることによって、シールド機の制御が
容易になる。In addition, by injecting a primary back-filling injection material that does not solidify and has fluidity into the gap between the outer peripheral surface of the shield machine and the ground excavation surface, the shield machine and the natural ground are separated. Friction can be reduced and the primary backfill injection material is highly fluid, which facilitates control of the shield machine.
更に本発明は、前記１次注入工程における裏込注入材を
発泡ビーズより構成したものであって、前記シールド機
外周面と地山掘削面との空隙の充填材として地山の崩壊
を防止し、発泡ビーズの有する流動性によって、シール
ド掘削機との間の摩擦を低減し、また余掘幅の大きさに
よって、発泡ビーズの径を選択しうるものである。Further, according to the present invention, the back-filling injection material in the primary injection step is made of foam beads, and prevents collapse of the ground as a filling material for a gap between the outer peripheral surface of the shield machine and the ground excavation surface. The fluidity of the expanded beads reduces friction with the shield excavator, and the diameter of the expanded beads can be selected depending on the size of the excess excavation width.
第１図及び第２図は本発明に係るシールド工法による曲
線部施工時の異種裏込注入材の注入方法の一実施例の実
施状況を示す横断平面図である。 （１）……シールド機、（２）……計画路線、（３）…
…１次注入配管、（４）……地山掘削面、（５）……１
次裏込注入材、（６）……セグメント、（７）……２次
注入配管、（８）……２次裏込注入材。FIG. 1 and FIG. 2 are cross-sectional plan views showing an implementation state of one embodiment of a method for injecting a different type of backfill injection material at the time of constructing a curved portion by the shield construction method according to the present invention. (1) …… Shield machine, (2) …… Planned route, (3)…
… Primary injection piping, (4) …… Solid excavation surface, (5) …… 1
Secondary backfill injection material, (6) …… Segment, (7) …… Secondary injection piping, (8) …… Secondary backfill injection material.
Claims (1)
て、シールド機外周面と地山掘削面との間の空隙部に、
固結することがなく、且つ流動性を有する発泡ビーズを
主材とした裏込注入材を注入する１次注入と、シールド
機の掘進後にシールド機テール部より後方に押し出され
たセグメントの外周面と地山掘削面との間の１次注入後
の空隙部にセメントを主材とする裏込注入材を注入する
２次注入とを行なうことを特徴とするシールド工法にお
ける曲線部施工時の異種裏込注入材の注入方法。1. When constructing a curved portion by the shield construction method, in a gap between the outer peripheral surface of the shield machine and the ground excavation surface,
Primary injection that injects backfill injection material that does not solidify and has flowable foam beads as the main material, and the outer peripheral surface of the segment extruded rearward from the tail part of the shield machine after the shield machine is dug Differently at the time of construction of the curved part in the shield construction method, characterized in that the secondary injection of injecting the backfill injection material mainly composed of cement is performed in the gap after the primary injection between the ground excavation surface and the ground How to inject backfill material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1257065A JPH0663434B2 (en) | 1989-10-03 | 1989-10-03 | Method of injecting different backfill material when constructing curved part by shield method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1257065A JPH0663434B2 (en) | 1989-10-03 | 1989-10-03 | Method of injecting different backfill material when constructing curved part by shield method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03119291A JPH03119291A (en) | 1991-05-21 |
| JPH0663434B2 true JPH0663434B2 (en) | 1994-08-22 |
Family
ID=17301255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1257065A Expired - Fee Related JPH0663434B2 (en) | 1989-10-03 | 1989-10-03 | Method of injecting different backfill material when constructing curved part by shield method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663434B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0571293A (en) * | 1991-06-12 | 1993-03-23 | Mitsui Constr Co Ltd | Tunnel construction method |
| CN105041326A (en) * | 2015-06-12 | 2015-11-11 | 北京城建设计发展集团股份有限公司 | Water-rich diabase and slate irregular mutual invasion rock shield residue soil improving method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5918900A (en) * | 1982-07-20 | 1984-01-31 | 東亜建設工業株式会社 | Method of construction of backing injection in method of shield construction |
-
1989
- 1989-10-03 JP JP1257065A patent/JPH0663434B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03119291A (en) | 1991-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |