JP2000226982A - Grouting reinforcing method in tunnel excavation - Google Patents
Grouting reinforcing method in tunnel excavationInfo
- Publication number
- JP2000226982A JP2000226982A JP11030126A JP3012699A JP2000226982A JP 2000226982 A JP2000226982 A JP 2000226982A JP 11030126 A JP11030126 A JP 11030126A JP 3012699 A JP3012699 A JP 3012699A JP 2000226982 A JP2000226982 A JP 2000226982A
- Authority
- JP
- Japan
- Prior art keywords
- tunnel
- section
- cross
- injection
- grout
- 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.)
- Pending
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、トンネル掘削にお
けるグラウト注入補強工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grouting reinforcement method for tunnel excavation.
【０００２】[0002]
【従来の技術】自立性の低いトンネル掘削に際して、本
坑の掘削に先立って、その周辺地盤をグラウト注入によ
って補強することが行われている。2. Description of the Related Art When excavating a tunnel with low autonomy, prior to excavation of a main shaft, the surrounding ground is reinforced by grouting.
【０００３】このグラウト注入には、トンネルが地表か
ら浅い個所では地上から注入管を挿入した行うこともで
きるが、地下深くでは地上からのグラウト注入を行うこ
とができない。[0003] This grout injection can be performed by inserting an injection pipe from the ground at a place where the tunnel is shallow from the surface of the ground, but grout cannot be injected from the ground deep below the ground.
【０００４】そこで、小径の導坑を利用してグラウト注
入による補強を図ることが知られている。その代表例
に、特許第２７２１９５０号に示されたものがある。こ
れは、本トンネル断面の下方またはトンネル断面内の下
方に導坑の中心を位置させて、その導坑内から上方に向
かって、放射状に注入管を挿入し、トンネルの天端外方
および鏡面外方領域をグラウト注入により補強するもの
である。Therefore, it is known to reinforce grout by using a small diameter shaft. A typical example is disclosed in Japanese Patent No. 2721950. This means that the center of the tunnel is located below the tunnel section or below the tunnel section, and the injection pipe is inserted radially upward from inside the tunnel, outside the top of the tunnel and outside the mirror. One area is reinforced by grouting.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、この方
法では、同特許公報の図３に代表的に示されていること
から明らかなように、導坑と改良部位との距離がきわめ
て長く、その分、注入管を挿入するための削孔長が長く
なり、施工速度の低下を招く。また、削孔時において孔
曲がりを生じた場合、隣接する注入管の間隔が設計通り
とならず、未改良領域が生じる可能性すらある。However, according to this method, the distance between the shaft and the improved part is extremely long, as is apparent from the typical example shown in FIG. However, the length of the hole for inserting the injection pipe becomes long, and the construction speed is reduced. Further, when the hole is bent at the time of drilling, the interval between adjacent injection pipes is not as designed, and an unimproved region may even be generated.
【０００６】さらに、全ての注入管について上向き注入
となり、その上向き注入のための特別な段取りが必要と
なり、この点からも施工能率が低いものとなる。Further, all the injection pipes are upwardly injected, and a special setup for the upward injection is required, which also lowers the work efficiency.
【０００７】したがって、本発明の課題は、施工能率を
高め、かつ、目的の個所を確実に改良補強できるものと
することにある。Accordingly, an object of the present invention is to improve the construction efficiency and to reliably improve and reinforce a target location.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決した本発
明の請求項１記載の発明は、掘削すべき本トンネル断面
の上方で、かつその断面のほぼ縦中心線上にあって、中
心が前記本トンネル断面外にある先進導坑を掘進し、前
記先進導坑内から直線状の注入管を、前記縦中心線を挟
む両側の前記本トンネル断面上方領域にそれぞれ挿入
し、その注入管を通してグラウトを注入し、対象の領域
を補強することを特徴とするトンネル掘削におけるグラ
ウト注入補強工法である。According to a first aspect of the present invention, there is provided a method for manufacturing a vehicle, comprising the steps of: (a) forming a tunnel above a tunnel to be excavated and substantially on a vertical center line of the section; Digging an advanced shaft outside the section of the tunnel, inserting a straight injection pipe from inside the advanced shaft into the upper region of the tunnel section on both sides sandwiching the vertical center line, and grouting through the injection pipe. This is a grout injection reinforcement method in tunnel excavation characterized by injecting and reinforcing a target area.
【０００９】請求項２記載の発明は、前記本トンネルの
一断面上方領域に、片側当たり複数個所において注入管
を挿入してグラウト注入による補強を行う請求項１記載
のトンネル掘削におけるグラウト注入補強工法である。According to a second aspect of the present invention, there is provided a grouting reinforcement method for tunnel excavation according to the first aspect, in which an injection pipe is inserted at a plurality of locations on one side of the cross section of the main tunnel to reinforce it by grouting. It is.
【００１０】請求項３記載の発明は、前記本トンネルの
一断面上方領域に、片側当たり複数個所において注入管
を挿入し、各注入管の挿入方向が水平または下向きであ
り、グラウト注入による補強を行う請求項１記載のトン
ネル掘削におけるグラウト注入補強工法である。According to a third aspect of the present invention, injecting pipes are inserted at a plurality of locations on one side of the tunnel in an upper section of one cross section, and the inserting direction of each of the injecting pipes is horizontal or downward. A grout injection reinforcement method in tunnel excavation according to claim 1.
【００１１】請求項４記載の発明は、前記縦中心線を挟
む両側の前記本トンネル断面上方領域に、ほぼ扇紙状の
断面を改良範囲とする請求項１記載のトンネル掘削にお
けるグラウト注入補強工法である。According to a fourth aspect of the present invention, there is provided a method for reinforcing grout in a tunnel excavation according to the first aspect of the present invention, wherein a substantially fan-shaped cross section is provided in the upper region of the cross section of the main tunnel on both sides of the vertical center line. It is.
【００１２】[0012]
【発明の実施の形態】以下本発明を図面に示す実施の形
態によってさらに詳説する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the embodiments shown in the drawings.
【００１３】１は掘削すべき本トンネル（本坑）で、そ
の断面の上方で、かつその断面のほぼ縦中心線ＣＬ上に
あって、中心Ｏが本トンネル１断面外にある先進導坑２
を掘進しておく。Reference numeral 1 denotes a main tunnel (main shaft) to be excavated, which is an advanced shaft 2 having a center O outside the cross section of the main tunnel 1 above the cross section and substantially on the vertical center line CL of the cross section.
Dig in advance.
【００１４】この先進導坑２内から直線状の注入管１０
を、縦中心線ＣＬを挟む両側の前記本トンネル１断面上
方領域にそれぞれ挿入する。この注入管１０の挿入に際
しては、ケーシング掘り形式の場合には、ケーシング掘
りし、その中に注入管１０を挿入した後、ケーシングを
引き抜く。ロッド注入を行う場合には、そのロッドによ
り削孔して、そのロッドを注入管とすることができる。
先進導坑２内から注入管を挿入するために、小型の削孔
機を選択して先進導坑２内に持ち込めばよい。From the inside of the advanced shaft 2, a straight injection pipe 10
Are respectively inserted into the upper region of the cross section of the main tunnel 1 on both sides of the vertical center line CL. When the injection pipe 10 is inserted, in the case of the casing digging type, the casing is dug, and after inserting the injection pipe 10 therein, the casing is pulled out. When rod injection is performed, holes can be drilled with the rod to use the rod as an injection tube.
In order to insert the injection pipe from inside the advanced shaft 2, a small drilling machine may be selected and brought into the advanced shaft 2.
【００１５】予め建て込んだ複数本の注入管１０，１０
…、あるいは順次建て込む注入管１０を通してグラウト
を注入し、対象の領域を補強する。[0015] A plurality of injection pipes 10, 10 pre-installed
.. Or grout is injected through an injection pipe 10 which is erected sequentially to reinforce the target area.
【００１６】この補強の終了を待って、その後に本トン
ネル１の掘進を行う。After completion of the reinforcement, the tunnel 1 is excavated thereafter.
【００１７】図１に特に明示されているように、本トン
ネル１の一断面上方領域に、片側当たり１本の注入管に
頼ることなく、複数個所において注入管１０を挿入して
グラウト注入による補強を行うのが、未改良領域を残さ
ないために好適である。As is particularly clearly shown in FIG. 1, the injection pipe 10 is inserted at a plurality of locations in the upper region of one section of the tunnel 1 without depending on one injection pipe per one side, and is reinforced by grout injection. Is preferable in order not to leave an unimproved region.
【００１８】本発明においては、本トンネル１に対する
先進導坑２の位置関係から、好適にも、本トンネル１の
一断面上方領域に、片側当たり複数個所において注入管
１０を挿入する際に、各注入管１０の挿入方向を水平ま
たは下向きとすることができる。したがって、上向き注
入を行うことが必要でない。In the present invention, from the positional relationship of the advanced shaft 2 with respect to the main tunnel 1, preferably, when the injection pipe 10 is inserted at a plurality of locations per one side in the upper region of one cross section of the main tunnel 1, The insertion direction of the injection tube 10 can be horizontal or downward. Therefore, it is not necessary to perform an upward injection.
【００１９】改良範囲は、トンネルの天端外方および鏡
面外方領域の、縦中心線ＣＬを挟む両側の本トンネル１
の断面上方領域に、ほぼ扇紙状の断面を改良範囲Ｚとす
ることができる。The range of improvement is that the main tunnels 1 on both sides of the vertical center line CL are located outside the top end and outside the mirror surface of the tunnel.
In the region above the cross section, a substantially fan-shaped cross section can be set as the improvement range Z.
【００２０】本発明において、注入方式および注入管形
式、あるいはグラウト材料についてに限定されるもので
はない。In the present invention, the present invention is not limited to the injection method and the injection tube type, or the grout material.
【００２１】[0021]
【発明の効果】以上のとおり、本発明によれば、施工能
率が高まるとともに、目的の個所を確実に改良補強でき
る。As described above, according to the present invention, the construction efficiency can be improved and the target portion can be surely improved and reinforced.
【図１】先進導坑と本トンネル断面との関係を示す概要
横断面図である。FIG. 1 is a schematic cross-sectional view showing a relationship between an advanced shaft and a cross section of the tunnel.
【図２】先進導坑と本トンネル断面との関係を示す概要
縦断面図である。FIG. 2 is a schematic longitudinal sectional view showing a relationship between an advanced shaft and a section of the tunnel.
１…本トンネル、２…先進導坑、１０…注入管。 1 ... this tunnel, 2 ... advanced shaft, 10 ... injection pipe.
Claims (4)
その断面のほぼ縦中心線上にあって、中心が前記本トン
ネル断面外にある先進導坑を掘進し、 前記先進導坑内から直線状の注入管を、前記縦中心線を
挟む両側の前記本トンネル断面上方領域にそれぞれ挿入
し、 その注入管を通してグラウトを注入し、対象の領域を補
強することを特徴とするトンネル掘削におけるグラウト
注入補強工法。An excavation is performed on an advanced shaft above the cross section of the tunnel to be excavated and substantially on the vertical center line of the cross section, and the center is outside the cross section of the tunnel. Grout injection in tunnel excavation, wherein grout is injected through the injection pipe to reinforce a target area, by inserting respective injection pipes into upper regions of the cross section of the tunnel on both sides of the vertical center line. Construction method.
当たり複数個所において注入管を挿入してグラウト注入
による補強を行う請求項１記載のトンネル掘削における
グラウト注入補強工法。2. The grouting reinforcement method in tunnel excavation according to claim 1, wherein a plurality of injection pipes are inserted at a plurality of locations on one side of the tunnel in the cross section to reinforce the grout by grouting.
当たり複数個所において注入管を挿入し、各注入管の挿
入方向が水平または下向きであり、グラウト注入による
補強を行う請求項１記載のトンネル掘削におけるグラウ
ト注入補強工法。3. The injection pipe according to claim 1, wherein injection pipes are inserted at a plurality of locations on one side of the tunnel in one section, and the insertion direction of each injection pipe is horizontal or downward, and reinforcement is performed by grout injection. Grout injection reinforcement method in tunnel excavation.
断面上方領域に、ほぼ扇紙状の断面を改良範囲とする請
求項１記載のトンネル掘削におけるグラウト注入補強工
法。4. The grout injection reinforcement method in tunnel excavation according to claim 1, wherein a substantially fan-shaped cross section is improved in an upper region of the cross section of the main tunnel on both sides of the vertical center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11030126A JP2000226982A (en) | 1999-02-08 | 1999-02-08 | Grouting reinforcing method in tunnel excavation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11030126A JP2000226982A (en) | 1999-02-08 | 1999-02-08 | Grouting reinforcing method in tunnel excavation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000226982A true JP2000226982A (en) | 2000-08-15 |
| JP2000226982A5 JP2000226982A5 (en) | 2005-11-10 |
Family
ID=12295094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11030126A Pending JP2000226982A (en) | 1999-02-08 | 1999-02-08 | Grouting reinforcing method in tunnel excavation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000226982A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230499A (en) * | 2019-07-19 | 2019-09-13 | 中铁第六勘察设计院集团有限公司 | Rich water soft clay area shield closely wears operation tunnel and actively protects structure and construction method |
| CN114263163A (en) * | 2021-12-29 | 2022-04-01 | 成都大学 | Grouting reinforcement method for diversion culvert passing through gravel stratum in high and cold regions and construction method |
| CN115126441A (en) * | 2022-08-10 | 2022-09-30 | 山东大学 | Grouting and grout stopping process for vertical deep drilling |
-
1999
- 1999-02-08 JP JP11030126A patent/JP2000226982A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230499A (en) * | 2019-07-19 | 2019-09-13 | 中铁第六勘察设计院集团有限公司 | Rich water soft clay area shield closely wears operation tunnel and actively protects structure and construction method |
| CN110230499B (en) * | 2019-07-19 | 2024-03-22 | 中铁第六勘察设计院集团有限公司 | Active protection structure of shield near-penetration operation tunnel in water-rich soft soil area and construction method |
| CN114263163A (en) * | 2021-12-29 | 2022-04-01 | 成都大学 | Grouting reinforcement method for diversion culvert passing through gravel stratum in high and cold regions and construction method |
| CN115126441A (en) * | 2022-08-10 | 2022-09-30 | 山东大学 | Grouting and grout stopping process for vertical deep drilling |
| CN115126441B (en) * | 2022-08-10 | 2023-09-29 | 山东大学 | Vertical deep drilling grouting and stopping process |
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