JPH02101286A - Method and device for crushing base rock or concrete - Google Patents
Method and device for crushing base rock or concreteInfo
- Publication number
- JPH02101286A JPH02101286A JP24902288A JP24902288A JPH02101286A JP H02101286 A JPH02101286 A JP H02101286A JP 24902288 A JP24902288 A JP 24902288A JP 24902288 A JP24902288 A JP 24902288A JP H02101286 A JPH02101286 A JP H02101286A
- Authority
- JP
- Japan
- Prior art keywords
- rock
- concrete
- rigidity
- hydraulic
- splitting device
- 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
- 239000011435 rock Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 7
- 238000005553 drilling Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、岩盤またはコンクリートの破砕方法及びその
装置に係るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for crushing rock or concrete.
（従来の技術）
従来、岩盤またはコンクリートを破砕する場合、（ｉ）
第５図に示すように、岩の岩盤（ａ）に設けた掘削部（
ｂ）にゴムチューブ（Ｃ）を挿入し、同ゴムチューブ（
Ｃ）に圧力流体を封入して岩盤の掘削部内周面に圧力を
作用させ、岩盤内に引張力を作用させる方法、 （ｉｉ
）第６図に示すように岩盤（ａ）に設けた掘削部（ａ）
に石灰等の膨脹剤（ｅ）を充填し、同膨脹剤の吸収膨張
力を利用して岩盤を破砕する方法、（山）第７図に示す
ように、岩盤（ａ）に設けた掘削部（ｂ）に予め鋼製ガ
イド（ｆ）を設置し、油圧Ｐによって同ガイド内に＋ｕ
（ｇ）を役人して前記ガイドを拡開せしめ、掘削孔内
周面を加圧して岩盤を破砕する方法が行なわれている。(Prior art) Conventionally, when crushing rock or concrete, (i)
As shown in Figure 5, the excavation part (
Insert the rubber tube (C) into b), and then
C) A method of applying pressure to the inner circumferential surface of the excavated portion of the rock by enclosing a pressure fluid in the rock to apply a tensile force within the rock, (ii
) As shown in Figure 6, the excavated part (a) is made in the bedrock (a).
A method of filling the rock with an expanding agent (e) such as lime and crushing the rock using the absorption and expansion power of the expanding agent. A steel guide (f) is installed in advance in (b), and +u is inserted into the guide by hydraulic pressure P.
The method (g) is used in which the guide is expanded by the operator and the inner circumferential surface of the excavation hole is pressurized to crush the rock.
（発明が解決しようとする課題）
しかしながら前記（ｉ）の方法は、岩盤破砕後、ゴムチ
ューブが亀裂内に食い込んで破断するため反復使用が困
難である。また硬岩を対象とする場合、岩盤を破砕する
のに必要な圧力を発生し難いという問題点があった。(Problems to be Solved by the Invention) However, the method (i) described above is difficult to repeatedly use because the rubber tube digs into the crack and breaks after the rock is crushed. Furthermore, when targeting hard rock, there is a problem in that it is difficult to generate the pressure necessary to crush the rock.
また、前記（ｉｉ ）の方法は、使用薬剤が高価であり
、化学反応を伴なうことから慎重な作業を必要とし、作
業効率が良好でないという問題点があった・
更に、前記（ｉｉｉ ）の方法は、載荷装置として油圧
シリンダを使用するため、装置全体の重量が大となり、
破砕作業の制御が困難で効率のよい作業が行なわれない
という問題点がある。In addition, the method (ii) above has the problem that the chemicals used are expensive and involve chemical reactions, so careful work is required, and the work efficiency is not good. The method uses a hydraulic cylinder as the loading device, which increases the weight of the entire device.
There is a problem in that it is difficult to control the crushing work and the work cannot be carried out efficiently.
本発明は前記従来技術の有する問題点に鑑みて提案され
たもので、その目的とする処は、筒車な構成で、岩盤ま
たはコンクリートを効率よく確実に破砕でき、工費の節
減が図られる岩盤またはコンクリートの破砕方法を提供
する点にある。The present invention has been proposed in view of the problems of the prior art described above, and its purpose is to provide a rock mass with an hour wheel configuration that can efficiently and reliably crush rock or concrete, thereby reducing construction costs. Or, it provides a method for crushing concrete.
（課題を解決するための手段）
前記の目的を達成するため、本発明に係る岩盤またはコ
ンクリートの破砕方法は、岩盤またはコンクリートに設
けた掘削孔に、各先端部間に亘って高剛性載荷板が装架
された複数の小型液圧ジヤツキの基端部を、高剛性反力
支持台で支持してなる割岩装置を挿入し、次いで前記各
液圧ジヤツキを作動して前記高剛性載荷板を介して前記
掘削孔内面を加圧して岩盤またはコンクリートに引張応
力を導入することを特徴とするものである。(Means for Solving the Problems) In order to achieve the above-mentioned object, the rock or concrete crushing method according to the present invention includes a method for crushing rock or concrete in which a highly rigid loading plate is placed between each tip of a drilled hole in rock or concrete. A rock-splitting device is inserted in which the base ends of a plurality of small hydraulic jacks on which are mounted are supported by a high-rigidity reaction force support, and then each of the hydraulic jacks is operated to move the high-rigidity loading plate. The method is characterized in that the inner surface of the excavation hole is pressurized through the pump to introduce tensile stress into the rock or concrete.
前記の方法を効果的に遂行しうるように、本発明に係る
岩盤またはコンクリートの破砕装置は、各先端部間に亘
って高剛性載荷板が装架された複数の小型液圧ジヤツキ
の基端部を高剛性反力支持台で支持してなる、岩盤また
はコンクリートに設けた掘削孔に挿入される割岩装置と
、同割岩装置における前記高剛性反力支持台に配設され
た圧液管路を介して、前記小型液圧ジヤツキに接続され
た液圧ユニットとから構成されている。In order to effectively carry out the above method, the rock or concrete crushing apparatus according to the present invention comprises a plurality of small hydraulic jacks each having a plurality of small hydraulic jacks each having a high-rigidity loading plate installed between each tip. A rock splitting device that is inserted into an excavated hole in rock or concrete, and a pressure liquid pipe line arranged on the high rigidity reaction support in the rock splitting device. and a hydraulic unit connected to the small hydraulic jack via a hydraulic jack.
また前記破砕作業の作業能率、省力化を図るため、本発
明に係る岩盤またはコンクリートの破砕方法は、岩盤ま
たはコンクリートに設けられた複数の掘削孔に挿入され
た前記各割岩装置における高剛性反力支持台に配設され
た前記各小型液圧ジヤツキに連通ずる圧液管路を、共通
の単一の液圧ユニットに接続し、同ユニットをマイクロ
コンピュータを介して制御するものである。In addition, in order to improve work efficiency and save labor in the crushing work, the method for crushing rock or concrete according to the present invention provides a high-rigidity reaction force in each of the rock breaking devices inserted into a plurality of excavated holes provided in the rock or concrete. The hydraulic fluid pipes communicating with each of the small hydraulic jacks disposed on the support stand are connected to a common single hydraulic unit, and the unit is controlled via a microcomputer.
更に同上の破砕作業を効果的に遂行しうるように本発明
に係る岩盤またはコンクリートの破砕装置は、岩盤また
はコンクリートに設けられた複数の掘削孔に夫々挿入さ
れた前記割岩装置と、同各割岩装置における前記小型液
圧ジヤツキに連通ずる前記高剛性反力支持台の圧液管路
に連通ずる共通の液圧ユニットと、同液圧ユニットを制
御するマイクロコンピュータ七より構成されている。Furthermore, in order to effectively carry out the above-mentioned crushing work, the rock or concrete crushing device according to the present invention includes the rock breaking device inserted into each of a plurality of excavated holes provided in the rock or concrete; It is comprised of a common hydraulic unit that communicates with the pressure fluid pipe line of the high-rigidity reaction force support base that communicates with the small hydraulic jack in the device, and a microcomputer 7 that controls the hydraulic unit.
（作用）
本発明は前記したように構成されているので、岩盤また
はコンクリートに設けた掘削孔に挿入された岩盤装置に
おける高剛性反力支持台に支持された複数の小型液圧ジ
ヤツキを作動させ、同ジヤツキの先端に装架された高剛
性載荷板によって前記掘削孔に圧力を伝達し、岩盤また
はコンクリート内に引張応力を生起せしめ、１８０°方
向に制御された亀裂を発生せしめ、岩盤またはコンクリ
ートを発破を使用することなく効率よく静的に破砕する
ことができる。(Operation) Since the present invention is configured as described above, a plurality of small hydraulic jacks supported by a high-rigidity reaction force support in a rock device inserted into an excavation hole provided in rock or concrete are operated. A high-rigidity loading plate attached to the tip of the jack transmits pressure to the excavation hole, generates tensile stress in the rock or concrete, generates controlled cracks in a 180° direction, and cracks the rock or concrete. can be efficiently and statically crushed without using blasting.
また岩盤またはコンクリートに複数の掘削孔を設け、同
各掘削孔に夫々前記割岩装置を挿入し、同各割岩装置に
おける各反力支持台に配設された前記小型液圧ジヤツキ
に連通ずる圧油管路に接続された共通の前記ジヤツキ作
動用の液圧ユニットをマイクロコンピュータによって制
御し、より効率よ（岩盤またはコンクリートの破砕作業
を遂行しうるちのである。Further, a plurality of drilling holes are formed in the bedrock or concrete, and the rock splitting device is inserted into each of the drilling holes, and a hydraulic oil pipe is connected to the small hydraulic jack installed on each reaction force support in each of the rock splitting devices. A common hydraulic unit connected to the jack for operating the jacks is controlled by a microcomputer, allowing more efficient rock or concrete crushing work.
（実施例） 以下本発明を図示の実施例について説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.
岩盤（］）に設けた掘削孔（２）内に先端部間に高剛性
載荷板（３）が連結された複数の小型油圧ジヤツキ（４
）の各基端部を、同各ジヤツキ（４）に連通ずる圧油管
路（５）を有する鋼製の高剛性反力支持台（６）で支持
してなる割岩装置（Ａ）を挿入する。A plurality of small hydraulic jacks (4) with high-rigidity loading plates (3) connected between their tips are installed in a drilled hole (2) in a bedrock (2).
) is supported by a high rigidity reaction force support stand (6) made of steel having a pressure oil pipe (5) communicating with each jack (4), and a rock splitting device (A) is inserted. .
次いで前記圧油管路（５）に適宜圧油供給装置を介して
圧油を供給して前記各ジヤツキ（４）を伸長すると、前
記反力支持台（６）に反力をとって前記高剛性載荷板（
３）によって前記掘削孔（２）の内周面に圧力を伝達し
、岩盤（１）に引張力を作用せしめる、この引張力によ
って同岩盤（１）内に引張応力が発生し、引張亀裂（７
）が１８０°方向に生起し、岩盤（１）が破砕される。Next, when the respective jacks (4) are extended by appropriately supplying pressure oil to the pressure oil pipe line (5) via a pressure oil supply device, the reaction force is applied to the reaction force support base (6) and the high rigidity is increased. Loading plate (
3) transmits pressure to the inner circumferential surface of the borehole (2) and applies a tensile force to the rock (1). This tensile force generates tensile stress within the rock (1), causing tensile cracks ( 7
) occurs in the 180° direction, and the rock (1) is crushed.
（第１図及び第２図参照）
このように前記の方法によれば引張亀裂方向を制御でき
るので、効率のよい岩盤（１）の破砕が可能となる。(See FIGS. 1 and 2) As described above, since the direction of the tensile cracks can be controlled according to the method described above, the rock mass (1) can be crushed efficiently.
第３図は本発明をトンネルの掘削に適用した実施例を示
し、トンネル切羽（８）の岩盤に予め掘削した多数の掘
削孔（９）に、夫々前記第１図及び第２図に示した高剛
性反力支持台（６）及び小型油圧ジヤツキ（４）並に高
剛性載荷板（３）よりなる割岩装置（八）を装着し、同
各割岩装置（Ａ）における高剛性反力支持台（６）の圧
油管路（５）を夫々油圧ユニツ）ＱＯ）にホース（１０
を介して接続し、同ユニットθｇ）より各圧油管路（５
）に圧力油を供給して前記小型油圧ジヤツキ（４）を作
動し、切羽（８）に引張亀裂０２１を発生せしめ、切羽
（８）の岩盤を破砕する。FIG. 3 shows an embodiment in which the present invention is applied to tunnel excavation, in which a large number of excavated holes (9) previously drilled in the rock of the tunnel face (8) are filled with the holes shown in FIGS. 1 and 2, respectively. A high-rigidity reaction force support stand (6), a small hydraulic jack (4), and a rock-splitting device (8) consisting of a high-rigidity loading plate (3) are installed, and a high-rigidity reaction-force support stand for each rock-splitting device (A) is installed. (6) Pressure oil pipes (5) are connected to respective hydraulic units (QO) and hoses (10
and connect each pressure oil pipe (5) from the unit θg).
), the small hydraulic jack (4) is operated to generate a tensile crack 021 in the face (8) and crush the rock at the face (8).
第４図は本発明の更に他の実施例を示すものであって、
前記第４図に示す実施例において、油圧ユニット０ωよ
り切羽（８）の各掘削孔（９）に装着された割岩装置（
Ａ）に供給される油圧をマイクロコンピュータ０つによ
って制御して、切羽（８）に亀裂０４）を発生せしめ、
同切羽（８）の岩盤を破砕する。FIG. 4 shows still another embodiment of the present invention,
In the embodiment shown in FIG. 4, a rock-splitting device (
The hydraulic pressure supplied to A) is controlled by a microcomputer to generate a crack 04) in the face (8),
The bedrock at the same face (8) will be crushed.
なお前記各実施例は、本発明を岩盤の破砕に適用した場
合を示すが、コンクリートの破砕にも適用されるもので
ある。Note that each of the above embodiments shows the case where the present invention is applied to crushing rock, but it is also applicable to crushing concrete.
（発明の効果）
本発明によれば前記したように、各先端部間に亘って高
剛性載荷板が装架された複数の小型液圧ジヤツキの各基
端部を高剛性反力支持台で支持してなる割岩装置を、岩
盤またはコンクリートに設けた掘削孔に挿入し、次いで
前記各液圧ジヤツキを作動して前記高剛性載荷板を介し
て前記掘削孔内面に圧力を伝達し、前記岩盤またはコン
クリート内に引張力を発生せしめ、１８０度方向に制御
された亀裂を発生せしめることによって、効果的な岩盤
またはコンクリートの静的な破壊が可能となる。(Effects of the Invention) According to the present invention, as described above, each of the base ends of a plurality of small hydraulic jacks each having a high-rigidity loading plate mounted between each tip part is mounted on a high-rigidity reaction support stand. A supported rock splitting device is inserted into an excavation hole made in bedrock or concrete, and then each of the hydraulic jacks is operated to transmit pressure to the inner surface of the excavation hole via the high-rigidity loading plate, and the rock splitting device is Alternatively, effective static fracture of rock or concrete can be achieved by generating tensile force within the concrete and generating controlled cracks in a 180 degree direction.
また本発明の方法に使用される割岩装置は剛性の高い材
料から構成されているので、反復使用が可能となる。Furthermore, since the rock splitting device used in the method of the present invention is made of a highly rigid material, it can be used repeatedly.
更に本発明の方法は、従来の膨張剤を使用した破砕方法
に比して、高価な薬品を使用することなく、経済的に岩
盤またはコンクリートを破砕しうるものである。Furthermore, the method of the present invention can crush rock or concrete more economically without using expensive chemicals, compared to conventional crushing methods using expansion agents.
請求項２の発明は、岩盤またはコンクリートに設けた複
数の掘削孔に夫々前記割岩装置を装着し、同各割岩装置
における高剛性反力支持台に設けた前記液圧ジヤツキに
連通ずる管路に接続された液圧ユニットをマイクロコン
ピュータで制御し、前記複数の掘削孔の割岩装置を同時
に作動し、更に載荷圧力、載荷、除荷の指示、載荷速度
等を自動制御し、破砕作業効率の向上、省力化を図るこ
とができる。The invention according to claim 2 provides a method for installing the rock splitting device in each of a plurality of excavated holes formed in bedrock or concrete, and connecting the rock splitting device to a pipe line communicating with the hydraulic jack provided on a high rigidity reaction force support in each of the rock splitting devices. The connected hydraulic unit is controlled by a microcomputer to simultaneously operate the rock breaking devices in the plurality of boreholes, and also automatically controls loading pressure, loading and unloading instructions, loading speed, etc., improving crushing work efficiency. , labor saving can be achieved.
請求項３の発明は、岩盤またはコンクリートに設けた掘
削孔に挿入された前記割岩装置と、同割岩装置における
高剛性反力支持台に配設された管路に接続されだ液圧ユ
ニットとによって前記岩盤またはコンクリートの破砕方
法を効果的に遂行しうる破砕装置を提供するものである
。The invention according to claim 3 is characterized in that the rock breaking device is inserted into an excavated hole formed in bedrock or concrete, and the hydraulic unit is connected to a pipe line arranged on a high-rigidity reaction support in the rock breaking device. The object of the present invention is to provide a crushing device that can effectively carry out the method for crushing rock or concrete.
請求項４の発明は、請求項３の岩盤またはコンクリート
の破砕装置においで、前記液圧ユニットに同ユニットを
制御するコンピュータを接続することによって、前記岩
盤またはコンクリートの破砕作業を効率よく遂行し、省
力化を図ることができるものである。The invention according to claim 4 is the rock or concrete crushing apparatus according to claim 3, in which the hydraulic unit is connected to a computer that controls the unit to efficiently perform the rock or concrete crushing work, This can save labor.
第１図は本発明に係る岩盤またはコンクリートの破砕方
法の一実施例の実施状況を示す縦断面図、第２図はその
縦断側面図、第３図は前記本発明の方法をトンネルの掘
削に適用した実施例の実施状況を示す斜視図、第４図は
本発明の他の実施例をトンネルの掘削に適用した状態を
示す斜視図、第５図及び第６国益に第７図は夫々従来方
法の実施状況を示す縦断側面図である。
（＋）−・・岩盤 （２）・−掘削孔（３）−
一高剛性載荷板 （４）−・小型油圧ジヤツキ（５）−
−一圧油管路 （６）・・・高剛性反力支持台（９
）−・−掘削孔 ０ω−油圧ユニット００−・−
ホース 面一・・マイクロコンピュータ（＾）・
・・割岩装置
尼３認
ＪｐＨ国
第４閃FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the rock or concrete crushing method according to the present invention, FIG. 2 is a longitudinal cross-sectional side view thereof, and FIG. FIG. 4 is a perspective view showing a state in which another embodiment of the present invention is applied to tunnel excavation, FIGS. 5 and 6 are national interest and FIG. 7 are conventional FIG. 3 is a longitudinal side view showing the implementation status of the method. (+)−・・Bedrock (2)・−Drilling hole (3)−
High rigidity loading plate (4)-・Small hydraulic jack (5)-
- Single pressure oil pipe (6)...High rigidity reaction force support stand (9
)−・−Drilling hole 0ω−Hydraulic unit 00−・−
Hose flush with microcomputer (^)
...Wariiwa Equipment 3rd Certification JpH Country 4th Sen
Claims (4)
端部間に亘って高剛性載荷板が装架された複数の小型液
圧ジャッキの基端部を、高剛性反力支持台で支持してな
る割岩装置を挿入し、次いで前記各液圧ジャッキを作動
して前記高剛性載荷板を介して前記掘削孔内面を加圧し
て岩盤またはコンクリートに引張応力を導入することを
特徴とする岩盤またはコンクリートの破砕方法。(1) The base ends of multiple small hydraulic jacks, each with a high-rigidity loading plate mounted between the tips, are supported by a high-rigidity reaction support in an excavated hole in bedrock or concrete. A rock splitting device comprising a rock splitting device is inserted, and then each of the hydraulic jacks is operated to pressurize the inner surface of the borehole via the high rigidity loading plate to introduce tensile stress into the rock or concrete. How to crush concrete.
夫々前記割岩装置を挿入し、次いで同各割岩装置におけ
る高剛性反力支持台に配設された前記各小型液圧ジャッ
キに連通する圧液管路に接続された共通の液圧ユニット
を、マイクロコンピュータを介して制御する請求項１記
載の岩盤またはコンクリートの破砕方法。(2) The rock splitting device is inserted into a plurality of excavated holes made in bedrock or concrete, and then the pressure fluid is communicated with each of the small hydraulic jacks installed on the high rigidity reaction support base of each rock splitting device. 2. The rock or concrete crushing method according to claim 1, wherein the common hydraulic unit connected to the pipe is controlled via a microcomputer.
数の小型液圧ジャッキの基端部を高剛性反力支持台で支
持してなる、岩盤またはコンクリートに設けた掘削孔に
挿入される割岩装置と、同割岩装置における前記高剛性
反力支持台に配設された圧液管路を介して、前記小型液
圧ジャッキに接続された液圧ユニットとから構成された
ことを特徴とする岩盤またはコンクリートの破砕装置。(3) An excavated hole in bedrock or concrete made by supporting the base ends of multiple small hydraulic jacks with high-rigidity loading plates mounted between each end on a high-rigidity reaction support stand. and a hydraulic unit connected to the small hydraulic jack via a hydraulic fluid pipe line installed on the high-rigidity reaction support base of the rock-splitting device. Rock or concrete crushing equipment featuring:
孔に夫々挿入された前記割岩装置と、同各割岩装置にお
ける前記小型液圧ジャッキに連通する前記高剛性反力支
持台の圧液管路に連通する共通の液圧ユニットと、同液
圧ユニットを制御するマイクロコンピュータとよりなる
請求項３記載の岩盤またはコンクリートの破砕装置。(4) The rock-splitting devices each inserted into a plurality of excavated holes provided in bedrock or concrete, and the pressure fluid pipes of the high-rigidity reaction support stand communicating with the small hydraulic jacks in each of the rock-splitting devices. 4. The rock or concrete crushing apparatus according to claim 3, comprising a common hydraulic unit that communicates with the hydraulic unit and a microcomputer that controls the hydraulic unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24902288A JPH02101286A (en) | 1988-10-04 | 1988-10-04 | Method and device for crushing base rock or concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24902288A JPH02101286A (en) | 1988-10-04 | 1988-10-04 | Method and device for crushing base rock or concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02101286A true JPH02101286A (en) | 1990-04-13 |
Family
ID=17186845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24902288A Pending JPH02101286A (en) | 1988-10-04 | 1988-10-04 | Method and device for crushing base rock or concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02101286A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002309782A (en) * | 2001-04-12 | 2002-10-23 | Daiho Constr Co Ltd | Breaking method and device of temporary structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058691B2 (en) * | 1980-01-11 | 1985-12-21 | 三菱マテリアル株式会社 | Wear-resistant composite components |
-
1988
- 1988-10-04 JP JP24902288A patent/JPH02101286A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058691B2 (en) * | 1980-01-11 | 1985-12-21 | 三菱マテリアル株式会社 | Wear-resistant composite components |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002309782A (en) * | 2001-04-12 | 2002-10-23 | Daiho Constr Co Ltd | Breaking method and device of temporary structure |
| JP4646430B2 (en) * | 2001-04-12 | 2011-03-09 | 大豊建設株式会社 | Temporary structure crushing method and crushing apparatus |
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