JPS5838743B2 - Lock bolt pullout test method - Google Patents
Lock bolt pullout test methodInfo
- Publication number
- JPS5838743B2 JPS5838743B2 JP10949481A JP10949481A JPS5838743B2 JP S5838743 B2 JPS5838743 B2 JP S5838743B2 JP 10949481 A JP10949481 A JP 10949481A JP 10949481 A JP10949481 A JP 10949481A JP S5838743 B2 JPS5838743 B2 JP S5838743B2
- Authority
- JP
- Japan
- Prior art keywords
- lock bolt
- rock
- test method
- hydraulic cylinder
- hydraulic
- 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
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000007586 pull-out test Methods 0.000 title claims description 7
- 239000011435 rock Substances 0.000 claims description 16
- 239000000945 filler Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000009430 construction management Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0033—Force sensors associated with force applying means applying a pulling force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【発明の詳細な説明】
本発明はロックボルトの施工管理に必要なロックボルト
の引抜試験方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rock bolt pull-out test method necessary for rock bolt construction management.
現在、トンネル施工にロックボルトが多用されるように
なったが、ロックボルトの定着力および充填剤の充填状
態を管理するうえで満足すべき方法がなかった。Currently, rock bolts are frequently used in tunnel construction, but there has been no satisfactory method for controlling the fixing force of rock bolts and the filling state of the filler.
従来行われてきた代表的なロックボルトの引抜試験法で
は第１図に示すごとく、岩盤１に埋込まれたロックボル
ト２の突出部にセンタホールジヤツキ３をセットし、荷
重計４を見ながら手動ポンプ５を漕いでナツト６を介し
てロックボルト２を引張ると共に、ロックボルト２の先
端に取付けたピアノ線７を介してダイヤルゲージ８でロ
ックボルト２の変位量を測定している。In the typical pull-out test method for rock bolts that has been carried out in the past, as shown in Figure 1, a center hole jack 3 is set on the protrusion of a rock bolt 2 embedded in a bedrock 1, and a load cell 4 is observed. At the same time, the manual pump 5 is operated to pull the lock bolt 2 through the nut 6, and the amount of displacement of the lock bolt 2 is measured with a dial gauge 8 through a piano wire 7 attached to the tip of the lock bolt 2.
なお９は台座、１０は当て板、１１はピアノ線に張力を
与える錘である。Note that 9 is a pedestal, 10 is a backing plate, and 11 is a weight that applies tension to the piano wire.
かかる方法において、ロックボルト２の突出部は通常４
０〜５０ｃｒＩＬの長さがあり、破断に至らしめるには
１０Ｃｒ／１位の伸び代長さが必要であるが、センタホ
ールジヤツキ３のストロークは３ｃＩｒＬ程度のために
セット替が生じ、精度上好ましくない。In such a method, the protrusion of the lock bolt 2 is usually 4
There are lengths of 0 to 50 crIL, and an elongation length of 10 Cr/1 is required to cause breakage, but the stroke of center hole jack 3 is about 3 cIrL, so setting changes occur, resulting in poor accuracy. Undesirable.
また、ダイヤルゲージ８の読み取り値には前述した１０
ｃｒｒＬにも達する伸び代が含まれているため、ロック
ボルト２の地山からの抜代を測定する方法として精度上
疑問が生じる。In addition, the reading value of the dial gauge 8 has the above-mentioned 10
Since this method includes an elongation that reaches crrL, there are doubts about the accuracy of the method for measuring the elongation of the rock bolt 2 from the ground.
さらに、埋込方向に真直に引抜くことは困難で、多少な
りともロックボルト２の頭がふれるのでダイヤルゲージ
８の読み取り値が正確な値とは断言できず極端な場合は
減少することもありうる。Furthermore, it is difficult to pull it out straight in the embedding direction, and the head of the lock bolt 2 will shake to some extent, so it cannot be guaranteed that the reading on the dial gauge 8 is an accurate value, and in extreme cases, it may decrease. sell.
本発明はかかる従来の欠点を解消し、正確で、取扱容易
な試験方法を提供するものである。The present invention overcomes these conventional drawbacks and provides a test method that is accurate and easy to handle.
以下図面に従って説明する。This will be explained below according to the drawings.
第２図は本発明による２気筒型油圧シリンダ１２を示し
たもので、油圧シリンダ１２の中央にセンタホール１３
を有し、ストローク１０ＣｒｒＬが可能である。FIG. 2 shows a two-cylinder hydraulic cylinder 12 according to the present invention, in which a center hole 13 is provided at the center of the hydraulic cylinder 12.
, and a stroke of 10 CrrL is possible.
該センタホール１３を第３図に示すごとく岩盤１に埋込
まれたロックボルト２の突出部に通し、ロックボルト２
のネジにナツト６をかけて蟲て板１０を介して前記油圧
シリンダ１２をはさみ込み、携帯用定量吐出型油圧ユニ
ット１４の圧油で、油圧シリンダ１２を作動せしめ、ナ
ツト６を介してロックボルト２を引抜く時の油圧変動を
携帯用ペン書オシログラフ１５で記録する。Pass the center hole 13 through the protrusion of the rock bolt 2 embedded in the rock 1 as shown in FIG.
The nut 6 is put on the screw, and the hydraulic cylinder 12 is inserted through the plate 10, and the hydraulic cylinder 12 is operated with the pressure oil from the portable fixed-rate hydraulic unit 14. The oil pressure fluctuations when pulling out 2 were recorded using a portable pen oscillograph 15.
かかる油圧変動は第４図のとと＜Ａ−Ｅのいずれかの波
形として記録され、波形Ａは充填剤が固く、ロックボル
トが抜けずに破断にまで至ったことを示し、波形Ｂ−Ｅ
は充填剤が柔らかい状態であることを示す。Such oil pressure fluctuations are recorded as any of the waveforms shown in FIG.
indicates that the filler is in a soft state.
なおこの状態で１０ｃｒｆＬ引抜いても定着力は回復す
るのでシステムロックボルトを引抜いてもさしつかえな
い。Note that even if you pull out 10 crfL in this state, the fixing force will be restored, so there is no problem even if you pull out the system lock bolt.
また近接したロックボルトの引抜波形がバラツキを生じ
た場合は充填が完全でないことを示すものである。Further, if the drawing waveforms of adjacent lock bolts vary, this indicates that the filling is not complete.
以上述べたように本発明によれば引抜試験は容易で、か
つ２気筒型油圧シリンダは従来の３ｃｒＩＬストローク
に対し、同一高さで１０ｃｒｒＬストロークカ可能で、
岩盤から突出した４０〜５０ｃｒｒＬ長さのロックボル
トを一度に破断まで引張ることができ、携帯用定量吐出
型油圧ユニットによる一定引抜速度と携帯用ペン書オシ
ログラフへの記録により、正確で、かつ施工チェックが
でき、かつデータの相互比較が確実に行える利点がある
。As described above, according to the present invention, the pull-out test is easy, and the two-cylinder hydraulic cylinder can have a stroke of 10crL at the same height, compared to the conventional 3crIL stroke.
It is possible to pull a 40 to 50 crrL long rock bolt protruding from the bedrock until it breaks at once, and the constant pulling speed with a portable fixed-dose hydraulic unit and the recording on a portable pen oscillograph ensure accurate construction. It has the advantage of being able to be checked and data can be compared reliably.
第１図は従来のロックボルト引抜試験法を示す側面図、
第２図は本発明による２気筒型油圧シリンダを示す斜視
図、第３図は本発明によるロックボルトの引抜試験法を
示す側面図、第４図は本発明により記録される油圧波形
である。
１・・・・・・岩盤、２・・・・・・ロックボルト、３
・・・・・・センタホールジヤツキ、４・・・・・・荷
重計、５・・・・・・手動ポンプ、６・・・・・・ナツ
ト、７・・・・・・ピアノ線、８・・・・・・ダイヤル
ゲージ、９・・・・・・台座、１０・・・・・・蟲て板
、１１・・・・・・錘、１２・・・・・・油圧シリンダ
、１３・・・・・・センタホール、１４・・・・・・油
圧ユニツｌ−１１５・・・・・・ペン書オシログラフ。Figure 1 is a side view showing the conventional rock bolt pullout test method;
FIG. 2 is a perspective view showing a two-cylinder hydraulic cylinder according to the present invention, FIG. 3 is a side view showing a rock bolt pullout test method according to the present invention, and FIG. 4 is a hydraulic waveform recorded according to the present invention. 1...Bedrock, 2...Rock bolt, 3
... Center hole jack, 4 ... Load cell, 5 ... Manual pump, 6 ... Nut, 7 ... Piano wire, 8...Dial gauge, 9...Pedestal, 10...Move plate, 11... Weight, 12... Hydraulic cylinder, 13 ... Center hole, 14 ... Hydraulic unit l-115 ... Pen writing oscillograph.
Claims (1)
油圧シリンダのセンタホールを通し、次いで当て板を介
してナツトで前記油圧シリンダをはさみ込み、携帯用定
量吐出型油圧ユニットの圧油により前記油圧シリンダを
作動させてロックボルトを引抜く時の油圧変動を携帯用
ペン書オシログラフで記録し、記録された油圧波形によ
ってロックボルトの定着力、充填剤の充填状態を管理す
ることを特徴としたロックボルトの引抜試験方法。1 Pass the center hole of a two-cylinder hydraulic cylinder through the protruding part of a rock bolt embedded in the rock, then sandwich the hydraulic cylinder with a nut through a backing plate, and use the pressure oil of a portable metered-discharge hydraulic unit. The hydraulic pressure fluctuation when the hydraulic cylinder is operated and the lock bolt is pulled out is recorded using a portable pen oscillograph, and the fixing force of the lock bolt and the filling state of the filler are managed based on the recorded hydraulic pressure waveform. A pullout test method for rock bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10949481A JPS5838743B2 (en) | 1981-07-15 | 1981-07-15 | Lock bolt pullout test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10949481A JPS5838743B2 (en) | 1981-07-15 | 1981-07-15 | Lock bolt pullout test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5811831A JPS5811831A (en) | 1983-01-22 |
| JPS5838743B2 true JPS5838743B2 (en) | 1983-08-25 |
Family
ID=14511667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10949481A Expired JPS5838743B2 (en) | 1981-07-15 | 1981-07-15 | Lock bolt pullout test method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5838743B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62259A (en) * | 1985-06-25 | 1987-01-06 | Ajinomoto Co Inc | Preservable seasoned food |
| JP6774239B2 (en) * | 2016-07-12 | 2020-10-21 | 株式会社大林組 | Test system and hydraulic pump device |
-
1981
- 1981-07-15 JP JP10949481A patent/JPS5838743B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5811831A (en) | 1983-01-22 |
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