JP2001020675A - Void filling method in excavating ground by excavator - Google Patents
Void filling method in excavating ground by excavatorInfo
- Publication number
- JP2001020675A JP2001020675A JP11195847A JP19584799A JP2001020675A JP 2001020675 A JP2001020675 A JP 2001020675A JP 11195847 A JP11195847 A JP 11195847A JP 19584799 A JP19584799 A JP 19584799A JP 2001020675 A JP2001020675 A JP 2001020675A
- Authority
- JP
- Japan
- Prior art keywords
- ground
- void
- chemical
- excavator
- gap
- 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
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、トンネルボーリン
グマシン（ＴＢＭ）のような掘削機により地山等の地盤
を掘削してトンネル等を構築するに際しての空隙充填工
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for filling a gap when a tunnel or the like is constructed by excavating the ground such as ground by an excavator such as a tunnel boring machine (TBM).
【０００２】[0002]
【従来の技術】建設コスト縮減の動向を受け、トンネル
工事においても急速施工による効率的な施工に対するニ
ーズが高い。この要請を受け、ここ数年急速施工を特徴
とするＴＢＭによるトンネル工事が多数出件しており、
今後もこの傾向は続くものと考えられる。2. Description of the Related Art In response to the trend of reducing construction costs, there is a high demand for efficient construction by rapid construction even in tunnel construction. In response to this request, a number of tunnel works by TBM, which has been characterized by rapid construction, have been issued in recent years.
This trend is expected to continue in the future.
【０００３】ところで、今までに実施されてきたＴＢＭ
トンネル掘削の殆どの工事では不良地山部で難儀してお
り、ＴＢＭ本来の急速施工が実現していないのが実状で
ある。[0003] By the way, the TBM that has been implemented
Most of the tunnel excavation work is difficult in bad mountainous areas, and the actual situation is that TBM's original rapid construction has not been realized.
【０００４】これらのトラブルでは、切羽部で地山の緩
みによる崩壊等を起こし、ＴＢＭカッターの回転不能か
ら掘進不能になっている。[0004] These troubles cause collapse or the like at the face portion due to loosening of the ground, so that the TBM cutter cannot rotate and cannot excavate.
【０００５】このトラブルに対し、殆どの場合、ＴＢＭ
が掘進不能になるまで無理をして推し続け、更に状態を
悪くしてトラブル脱出を難しくしている。そうした後、
打つ手が無くなってから、切羽の前へ出て従来の支保工
を入れ、地山の補強・支保を行ってＴＢＭを救出してい
るのが現状である。[0005] In most cases, TBM
Keeps pushing until it becomes impossible to excavate, and worsens the situation, making it difficult to get out of trouble. After that,
At present, the TBM is rescued by going out in front of the face and using conventional shoring to reinforce and support the ground after running out of hands.
【０００６】この方法では、時間的にも、コスト的にも
高いものとなり、改善が望まれるところである。[0006] This method is expensive in terms of time and cost, and improvement is desired.
【０００７】また、最近では上記のような状態に陥った
際、効率良く脱出するため注入式のフォアパイリング等
も試みられているが、不具合が発生している。[0007] In addition, in recent years, injection-type fore-piling and the like have been attempted in order to escape efficiently when falling into the above-mentioned state, but a problem has occurred.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、上記のよう
な従来技術の持つ問題点を解決し、不良地盤部での施工
効率の向上を図り得る空隙充填工法を提供しようとする
ものである。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a gap filling method capable of improving the construction efficiency on a defective ground portion. .
【０００９】[0009]
【課題を解決するための手段】本発明によれば、地盤を
掘削機で掘削し、地盤の緩みや空隙の発生を検知すると
掘削機を停止し、空隙に薬液をエアー吹き付けにより注
入して、空隙を薬液で充填し、緩みの拡散を防止す。According to the present invention, the ground is excavated by an excavator, and when the loosening of the ground or the occurrence of a gap is detected, the excavator is stopped, and a chemical solution is injected into the gap by air blowing. Fill the voids with chemicals to prevent loose diffusion.
【００１０】薬液としては、発泡ウレタン薬液を用い
る。As the chemical, a urethane foam chemical is used.
【００１１】薬液を注入する際には、２薬液をエアーミ
キシング装置に供給し、２薬液が供給されたエアーミキ
シング装置に加圧エアーを供給して混合薬液とし、この
混合薬液をエアー圧により吹き付けて注入する。When the chemicals are injected, the two chemicals are supplied to an air mixing device, and pressurized air is supplied to the air mixing device to which the two chemicals are supplied to form a mixed chemical, and this mixed chemical is sprayed by air pressure. And inject.
【００１２】掘削機としては、トンネルボーリングマシ
ンの他に、ブーム掘削機、バックホウ、大型ブレーカ
ー、割岩機等が挙げられる。As the excavator, besides a tunnel boring machine, a boom excavator, a backhoe, a large breaker, a rock cutter, and the like can be mentioned.
【００１３】空隙に充填された薬液は固化して空隙を埋
め、緩みの拡散を防止する。そして、薬液はエアー圧で
もって吹き付けられて、遠くまで飛散し、微細なクラッ
クの奥まで充填する。The chemical liquid filled in the voids solidifies and fills the voids, preventing diffusion of looseness. Then, the chemical solution is sprayed with air pressure, scattered far away, and filled into the minute cracks.
【００１４】[0014]
【発明の実施の形態】図１は、ＴＢＭ１により地山Ｓを
掘削してトンネルＴを構築する際、不良地山部に遭遇
し、切羽の小規模崩落を起こした場合で、空洞Ｒ−１
に、詳細を後述するエアー吹き付けにより薬液Ｃを注入
して充填し、崩落の広がりを防止する例を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a case where a tunnel T is constructed by excavating a ground S by a TBM 1 and a bad ground is encountered and a small scale collapse of a face occurs.
Next, an example will be described in which the chemical solution C is injected and filled by air blowing, which will be described in detail later, to prevent the spread of collapse.
【００１５】図２は、切羽に大規模崩落を起こした場合
で、図２の上図に示すように、空洞Ｒ−２におけるＴＢ
Ｍ１周辺に、エアー吹き付けにより薬液Ｃを注入して充
填し、更に、図２の下図に示すように、空洞Ｒ−２に、
エアー吹き付けにより薬液Ｃを注入して通常充填する例
を示す。FIG. 2 shows a case where a large-scale collapse of the face occurs. As shown in the upper diagram of FIG.
Around the M1, a chemical solution C is injected and filled by air blowing, and further, as shown in the lower diagram of FIG.
An example in which a chemical solution C is injected by air blowing and normally filled is shown.
【００１６】図３は、ＴＢＭ１により地山Ｓを掘削して
トンエルＴを構築する際、後部で小規模崩落を起こした
場合で、空洞Ｒ−３に、エアー吹き付けにより薬液Ｃを
注入して充填し、崩落の広がりを防止する例を示す。FIG. 3 shows a case where a small scale collapse occurs at the rear when excavating the ground S by the TBM 1 and constructing the tonell T. The chemical R is injected into the cavity R-3 by air blowing and filled. Then, an example of preventing the spread of collapse will be described.
【００１７】図４は、後部で大規模崩落を起こした場合
で、図４の上図に示すように、空洞Ｒ−４におけるＴＢ
Ｍ１周辺に、エアー吹き付けにより薬液Ｃを注入して充
填し、更に、図４の下図に示すように、空洞Ｒ−４に、
エアー吹き付けにより薬液Ｃを注入して通常充填する例
を示す。FIG. 4 shows a case where a large-scale collapse has occurred at the rear portion. As shown in the upper diagram of FIG.
Around the M1, a chemical solution C is injected and filled by air blowing, and further, as shown in the lower diagram of FIG.
An example in which a chemical solution C is injected by air blowing and normally filled is shown.
【００１８】図５にしたがい更に詳述すると、ＴＢＭ１
て地山Ｓを掘進し、カッタートルクの増大等の機械デー
タ及びカッターヘッドのスリット等の隙間からの坑内観
察等から、地山Ｓの緩みや空隙の発生を検知したら、Ｔ
ＢＭ１を停止し、カッターヘッドのスリット等の隙間か
ら空隙の位置や大きさを確認する。More specifically, referring to FIG.
When the looseness of the ground S and the generation of the gap are detected from the machine data such as the increase of the cutter torque and the observation in the pit from the gap such as the slit of the cutter head, the T
Stop the BM 1 and confirm the position and size of the gap from the gap such as the slit of the cutter head.
【００１９】次いで、カッターヘッドのスリット等の隙
間から、崩落によって生じた空洞Ｒに耐熱塩化ビニル製
パイプ２を挿入し、ノズルよりエアー混合方式で薬液を
注入して、空洞Ｒを充填し、空洞（緩み）の拡散を防止
する。Next, a pipe made of heat-resistant vinyl chloride is inserted into the cavity R formed by the collapse from a gap such as a slit of the cutter head, and a chemical solution is injected from a nozzle by an air mixing method to fill the cavity R. (Looseness) is prevented from spreading.
【００２０】エアー吹き付けによる混合薬液Ｃの充填
は、通常、図示のように、崩落した空洞Ｒの表面を混合
薬液Ｃで覆うようにするが、空洞Ｒの全体を混合薬液Ｃ
で充填することも場合によっては行う。When the mixed chemical solution C is filled by air blowing, the surface of the collapsed cavity R is usually covered with the mixed chemical solution C as shown in FIG.
Filling may be performed in some cases.
【００２１】切羽の状態が悪く、ＴＢＭ１のチャンバー
に入れない場合は、予めＴＢＭ本体に装備された注入用
ポートから同様の注入を行う。When the face is in a bad condition and cannot be inserted into the chamber of the TBM 1, the same injection is performed in advance through an injection port provided in the TBM main body.
【００２２】薬液としては、発泡ウレタン薬液を使用す
る。勿論、他の薬液であってもよい。As the chemical, urethane foam chemical is used. Of course, other chemicals may be used.
【００２３】今、薬液として、発泡ウレタン薬液を使用
した場合について述べると、図６及び図７において、エ
アーミキシング装置３は、２つの薬液流入口４、５とエ
アー流入口６及び吐出口７とを備えており、Ａ薬液（例
えばポリオール）タンク８及びＢ薬液（例えばイソシア
ネート成分）タンク９より、管理盤１０ａを備えた注入
機（ポンプ）１０によりＡ薬液とＢ薬液とをエアーミキ
シング装置３の各薬液流入口４、５に送り、この両薬液
Ａ、Ｂを、空気圧縮機１１からエアーミキシング装置３
のエアー流入口６に流入するエアーで混合し、混合薬液
Ｃを、エアー圧により、耐熱塩化ビニル製パイプ２を経
て空洞Ｒに吹き付け、空洞Ｒを薬液で充填する。Now, a case in which a urethane foam chemical is used as the chemical will be described. In FIGS. 6 and 7, the air mixing device 3 comprises two chemical liquid inlets 4, 5 and an air inlet 6 and a discharge port 7. And an A mixing device (for example, a polyol) tank 8 and a B chemical solution (for example, an isocyanate component) tank 9 by using an injecting machine (pump) 10 having a control panel 10a. The two chemicals A and B are sent to the respective chemical liquid inlets 4 and 5 and the two chemicals A and B are supplied from the air compressor 11 to the air mixing device 3.
The mixed chemical C is sprayed to the cavity R through the heat-resistant vinyl chloride pipe 2 by air pressure, and the cavity R is filled with the chemical.
【００２４】空洞Ｒを充填した混合薬液Ｃは、発泡しな
がら膨張し、空洞Ｒ内に充填された状態で固化して、軽
石状となり、空洞Ｒの拡散を防止する。The mixed chemical solution C filled in the cavity R expands while foaming, and solidifies in a state filled in the cavity R to form a pumice stone, thereby preventing the cavity R from diffusing.
【００２５】混合薬液Ｃは、エアー圧で吹き付けて、注
入するものであるので、遠くまで所定の圧でもって吹き
付けることが出来、微細なクラックの奥まで充填するこ
とが出来る。Since the mixed chemical solution C is sprayed and injected with air pressure, it can be sprayed with a predetermined pressure to a distant place, and can be filled deep into a fine crack.
【００２６】ガス混入率はＡ液に対して０〜８０％（大
気圧換算）、エアー圧力は２ｋｇ／ｃｍ２ （通常２〜
５ｋｇ／ｃｍ２ 程度）、エアー量は１０００ＮＬ／ｍ
ｉｎ以上、吐出量は０〜１２ｋｇ／ｍｉｎ（３〜７ｋｇ
／ｍｉｎが標準）、吐出圧力はエアー圧力以下とする。The gas mixing rate is 0 to 80% (converted to atmospheric pressure) with respect to the liquid A, and the air pressure is 2 kg / cm 2 (usually 2 to 2 kg / cm 2 ).
5kg / cm 2 or so), the amount of air is 1000NL / m
in or more, the discharge rate is 0 to 12 kg / min (3 to 7 kg
/ Min is standard) and the discharge pressure is equal to or lower than the air pressure.
【００２７】混合薬液Ｃが固化すれば、ＴＢＭ１を再び
起動し、パイプ２のＴＢＭ外部に出て一体に固化された
部分を残して、切断し、トンネルＴを堀進する。パイプ
２は塩化ビニル製であるため掘削の邪魔にはならない。
なお、一度の充填で再崩落が防止できないときは、空洞
Ｒが自立するまで充填を繰り返す。When the mixed chemical C is solidified, the TBM 1 is started again, and the pipe 2 is cut outside the TBM outside the TBM, leaving a solidified part, and the tunnel T is dug. Since the pipe 2 is made of vinyl chloride, it does not hinder the excavation.
If refilling cannot be prevented by one filling, the filling is repeated until the cavity R becomes independent.
【００２８】掘削機は、ＴＭＢに限らず、他の掘削機で
掘削する際の空隙拡散防止に前記の工法を実施すること
ができる。The excavator is not limited to the TMB, and the above-described method can be applied to prevent the diffusion of voids when excavating with another excavator.
【００２９】図８にエアーミキシング装置３の詳細を示
し、Ａ薬液が流入する薬液流入口４とＢ薬液が流入する
薬液流入口５、加圧エアーが流入するエアー流入口６、
及び吐出口７を備えており、薬液流入口４、５から流入
したＡ薬液とＢ薬液に、エアー流入口６からエアーを供
給して混合し、混合薬液Ｃをエアー圧により、所定の圧
でもって吐出口７からパイプ３へと流出し、吹き付け
る。FIG. 8 shows the details of the air mixing device 3, in which a chemical liquid inlet 4 into which a chemical liquid A flows, a chemical liquid inlet 5 into which a chemical liquid B flows, an air inlet 6 into which pressurized air flows,
And a discharge port 7. Air is supplied from the air inlet 6 to the A chemical liquid and the B chemical liquid flowing from the chemical liquid inlets 4 and 5, and the mixed chemical liquid C is mixed at a predetermined pressure by air pressure. Then, it flows out from the discharge port 7 to the pipe 3 and is sprayed.
【００３０】[0030]
【発明の効果】本発明は、次の優れた効果を奏するもの
である。 （１） 大がかりな段取りを必要としない。 （２） 切羽の前や拡幅した部分へ出て、危険な作業を
行う必要がない。 （３） 地山の緩み範囲が広がらない内に、迅速に地山
を拘束出来る。 （４） 混合薬液は、エアー圧で吹き付けて、注入する
ものであるので、遠くまで所定の圧でもって吹き付ける
ことが出来、微細なクラックの奥まで充填することが出
来る。 （５） 他の工法に比べ容易に施工出来、低コストであ
る。The present invention has the following excellent effects. (1) Extensive setup is not required. (2) It is not necessary to go out in front of the face or to the widened portion to perform dangerous work. (3) The ground can be quickly restrained before the loosened area of the ground is widened. (4) Since the mixed chemical solution is sprayed and injected with air pressure, it can be sprayed with a predetermined pressure to a far distance, and can be filled deep into a fine crack. (5) Easy construction and low cost compared to other construction methods.
【図１】小規模な切羽崩壊を吹き付けにより薬液充填す
る概念図。FIG. 1 is a conceptual diagram of filling a chemical solution by spraying a small face collapse.
【図２】大規模な切羽崩壊を吹き付けにより薬液充填す
る概念図。FIG. 2 is a conceptual diagram of filling a chemical solution by spraying large-scale face collapse.
【図３】小規模な後部崩壊を吹き付けにより薬液充填す
る概念図。FIG. 3 is a conceptual diagram of filling a chemical solution by spraying a small rear collapse.
【図４】大規模な後部崩壊を吹き付けにより薬液充填す
る概念図。FIG. 4 is a conceptual diagram of filling a chemical solution by spraying a large-scale rear collapse.
【図５】崩落空洞を吹き付けにより薬液充填する概要
図。FIG. 5 is a schematic diagram of filling a collapsed cavity with a chemical solution by spraying.
【図６】薬液の吹き付け装置の配管図。FIG. 6 is a piping diagram of a chemical spraying device.
【図７】薬液の吹き付け装置の外観図。FIG. 7 is an external view of a chemical spraying device.
【図８】エアーミキシング装置の側面図。FIG. 8 is a side view of the air mixing device.
１・・・ＴＢＭ ２・・・塩ビ管 ３・・・エアーミキシング装置 ４・・・Ａ薬液流入口 ５・・・Ｂ薬液流入口 ６・・・エアー流入口 ７・・・吐出口 ８・・・Ａ薬液タンク ９・・・Ｂ薬液タンク １０・・・注入装置 Ａ・・・Ａ薬液 Ｂ・・・Ｂ薬液 Ｃ・・・混合薬液 Ｒ・・・空洞 Ｓ・・・地山 Ｔ・・・トンネル DESCRIPTION OF SYMBOLS 1 ... TBM 2 ... PVC pipe 3 ... Air mixing device 4 ... A chemical liquid inlet 5 ... B chemical liquid inlet 6 ... Air inlet 7 ... Discharge port 8 ...・ A chemical liquid tank 9 ・ ・ ・ B chemical liquid tank 10 ・ ・ ・ Injection device A ・ ・ ・ A chemical liquid B ・ ・ ・ B chemical liquid C ・ ・ ・ Mixed chemical liquid R ・ ・ ・ Cavity S ・ ・ ・ Ground mountain T ・ ・ ・tunnel
フロントページの続き (72)発明者 下 寺 信 一 東京都港区元赤坂一丁目２番７号 鹿島建 設株式会社内 (72)発明者 宇 田 信 也 愛知県小牧市大字北外山字哥津3600番地 東海ゴム工業株式会社内 (72)発明者 小 柳 博 愛知県小牧市大字北外山字哥津3600番地 東海ゴム工業株式会社内 Ｆターム(参考） 2D054 AC20 FA02 GA15 2D055 BA09 DB01 Continuing on the front page (72) Inventor Shin-ichi Shinji 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Shinya Uda Kodai-shi, Aichi Prefecture 3600 No. Tokai Rubber Industries Co., Ltd. (72) Inventor Hiroshi Koyanagi Hiroshi Komaki, Aichi Pref.
Claims (3)
隙の発生を検知すると掘削機を停止し、空隙に薬液をエ
アー吹き付けにより注入して、空隙を薬液で充填し、緩
みの拡散を防止することを特徴とする掘削機により地盤
を掘削するに際しての空隙充填工法。1. Excavation of the ground with an excavator, and when the loosening of the ground or the occurrence of a gap is detected, the excavator is stopped, a chemical solution is injected into the gap by air blowing, the gap is filled with a chemical solution, and diffusion of the looseness is performed. A gap filling method when excavating the ground by an excavator, characterized in that the excavation is prevented.
ことを特徴とする請求項１に記載の掘削機により地盤を
掘削するに際しての空隙充填工法。2. The method according to claim 1, wherein the excavator excavates a tunnel.
キシング装置に供給し、２薬液が供給されたエアーミキ
シング装置に加圧エアーを供給して混合薬液とし、この
混合薬液をエアー圧により吹き付けて注入することを特
徴とする請求項１乃至２に記載の掘削機により地盤を掘
削するに際しての空隙充填工法。3. When injecting a chemical, the two chemicals are supplied to an air mixing device, and pressurized air is supplied to an air mixing device to which the two chemicals are supplied to form a mixed chemical, and the mixed chemical is subjected to air pressure. 3. A method for filling a gap when excavating a ground by the excavator according to claim 1 or 2, wherein the injection is performed by spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11195847A JP2001020675A (en) | 1999-07-09 | 1999-07-09 | Void filling method in excavating ground by excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11195847A JP2001020675A (en) | 1999-07-09 | 1999-07-09 | Void filling method in excavating ground by excavator |
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| JP2001020675A true JP2001020675A (en) | 2001-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP11195847A Pending JP2001020675A (en) | 1999-07-09 | 1999-07-09 | Void filling method in excavating ground by excavator |
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| JP (1) | JP2001020675A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567719A (en) * | 2016-10-20 | 2017-04-19 | 上海交通大学 | Determination method of sand karst stratum shield tunnel grouting safe karst cave distance |
| CN110821513A (en) * | 2019-10-24 | 2020-02-21 | 中铁十八局集团有限公司 | Construction method for performing advanced grouting and supporting on tunnel local collapse |
| CN113325478A (en) * | 2021-05-11 | 2021-08-31 | 中煤(天津)地下工程智能研究院有限公司 | Intelligent detection device for advancing direction of driving face |
| CN117418863A (en) * | 2023-11-22 | 2024-01-19 | 中国矿业大学(北京) | Roadway crack partition identification and guniting plugging method and device |
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| JPH0228448B2 (en) * | 1980-08-18 | 1990-06-25 | Mitsubishi Electric Corp | |
| JPH06105023B2 (en) * | 1991-06-26 | 1994-12-21 | 長友 成樹 | Chemical solution injection method |
| JPH0712548A (en) * | 1993-06-21 | 1995-01-17 | Kajima Corp | Method and apparatus for detection of gap around shield excavator |
| JPH10159483A (en) * | 1996-11-29 | 1998-06-16 | Hitachi Zosen Corp | Shield excavation machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0228448B2 (en) * | 1980-08-18 | 1990-06-25 | Mitsubishi Electric Corp | |
| JPH06105023B2 (en) * | 1991-06-26 | 1994-12-21 | 長友 成樹 | Chemical solution injection method |
| JPH0712548A (en) * | 1993-06-21 | 1995-01-17 | Kajima Corp | Method and apparatus for detection of gap around shield excavator |
| JPH10159483A (en) * | 1996-11-29 | 1998-06-16 | Hitachi Zosen Corp | Shield excavation machine |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567719A (en) * | 2016-10-20 | 2017-04-19 | 上海交通大学 | Determination method of sand karst stratum shield tunnel grouting safe karst cave distance |
| CN106567719B (en) * | 2016-10-20 | 2019-04-19 | 上海交通大学 | A kind of safe solution cavity determination of distance method of sand karst strata shield tunnel slip casting |
| CN110821513A (en) * | 2019-10-24 | 2020-02-21 | 中铁十八局集团有限公司 | Construction method for performing advanced grouting and supporting on tunnel local collapse |
| CN110821513B (en) * | 2019-10-24 | 2021-07-06 | 中铁十八局集团有限公司 | Construction method for performing advanced grouting and supporting on tunnel local collapse |
| CN113325478A (en) * | 2021-05-11 | 2021-08-31 | 中煤(天津)地下工程智能研究院有限公司 | Intelligent detection device for advancing direction of driving face |
| CN117418863A (en) * | 2023-11-22 | 2024-01-19 | 中国矿业大学(北京) | Roadway crack partition identification and guniting plugging method and device |
| CN117418863B (en) * | 2023-11-22 | 2024-05-14 | 中国矿业大学(北京) | Roadway crack partition identification and guniting plugging method and device |
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