JPH0326730B2 - - Google Patents
Info
- Publication number
- JPH0326730B2 JPH0326730B2 JP59211092A JP21109284A JPH0326730B2 JP H0326730 B2 JPH0326730 B2 JP H0326730B2 JP 59211092 A JP59211092 A JP 59211092A JP 21109284 A JP21109284 A JP 21109284A JP H0326730 B2 JPH0326730 B2 JP H0326730B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- pressure sensor
- oil pressure
- piston
- 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 - Lifetime
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【発明の詳細な説明】
（発明が属する技術分野）
本発明は軟弱地盤の強度や性状を検知する装置
に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical field to which the invention pertains) The present invention relates to a device for detecting the strength and properties of soft ground.
（発明の課題とその特徴点）
砂杭造成用ケーシングのような地盤処理用地中
貫入体の下端部に地盤強度検知装置を取り付け
て、地盤処理用地中貫入体の貫入時に、各深度の
地盤強度や地盤性状を連続的に検知できれば、地
盤処理の施工上、有利である。(Problems to be solved by the invention and its features) A ground strength detection device is attached to the lower end of an underground penetrating body for ground treatment such as a casing for constructing sand piles, and the ground strength at each depth is measured when the underground penetrating body for ground treatment penetrates. If it is possible to continuously detect the ground conditions and ground conditions, it will be advantageous for ground treatment.
ところで、簡易な地盤強度検知装置として、シ
リンダの下端から突出した先端コーンが地中貫入
時に受ける力を、ピストンとその背後の可撓性筒
体内に封入された液体とを介して圧力変換器の受
圧部に伝達して検出するようにしたものは既に知
られているが（実公昭52−34167号公報参照）、こ
の装置は、先端コーンに大きな衝撃力が作用した
場合に圧力変換器が破損する恐れがあるため、振
動機等により大きな衝撃力を作用させながら貫入
が行われる地盤処理用地中貫入体の下端部に取り
付けるのには不向きである。 By the way, as a simple ground strength detection device, the force that the tip cone protruding from the lower end of the cylinder receives when penetrating the ground is transferred to a pressure transducer through a piston and a liquid sealed in a flexible cylinder behind it. A device that detects pressure by transmitting it to the pressure receiving part is already known (see Japanese Utility Model Publication No. 52-34167), but this device prevents the pressure transducer from being damaged if a large impact force is applied to the tip cone. Therefore, it is not suitable for installation at the lower end of an underground penetrating body for ground treatment where penetration is performed while applying a large impact force using a vibrator or the like.
本発明は、地盤処理用地中貫入体の下端部に取
り付けて地盤処理用地中貫入体の貫入中に地盤強
度や地盤性状を連続的に検知するのに好適な地盤
強度検知装置を提供することを目的としているも
のであつて、その構成上の特徴は特許請求の範囲
に記載したとおりである。 The present invention provides a ground strength detection device that is suitable for being attached to the lower end of an underground penetrating body for ground treatment and continuously detecting the ground strength and soil properties during the penetration of the underground penetrating body for ground treatment. The structural features thereof are as described in the claims.
（図面による説明）
第１図、第２図は本発明の一実施例の説明図で
あり、第１図に示すピストン・シリンダ機構１
は、シリンダ部２とピストン部３とから成る。(Explanation with drawings) FIGS. 1 and 2 are explanatory diagrams of an embodiment of the present invention, and the piston-cylinder mechanism 1 shown in FIG.
consists of a cylinder part 2 and a piston part 3.
シリンダ部２は、シリンダ４の先端にブシユ５
を介して保護カラー６を接続して構成され、ま
た、ピストン部３は、ピストン７から突出するピ
ストン棒８の先端にコーン９を螺合により一体的
に取り付けて構成されている。 The cylinder part 2 has a bush 5 at the tip of the cylinder 4.
The piston portion 3 is constructed by connecting a protective collar 6 through a piston 7, and a cone 9 is integrally attached to the tip of a piston rod 8 protruding from the piston 7 by screwing.
コーン９の後部は保護カラー６の先端部に摺動
自在に嵌挿され、この嵌挿部にはシール１０が施
されている。 The rear part of the cone 9 is slidably fitted into the tip of the protective collar 6, and a seal 10 is applied to this fitting part.
ピストン７を収容するシリンダ４の後端壁には
周面にねじを刻設した透孔１１が、また、シリン
ダ４の前方周壁にはシリンダ４の前部空間１２に
通じる空気孔１３が、それぞれ穿設されている。 The rear end wall of the cylinder 4 that accommodates the piston 7 has a through hole 11 with a thread cut into its peripheral surface, and the front peripheral wall of the cylinder 4 has an air hole 13 that communicates with the front space 12 of the cylinder 4. It is perforated.
第２図において、１４は油圧緩衝器、１５は油
圧緩衝器１４に設けられた小径の通油孔、１６は
油圧センサ室、１７は油圧センサ１６の奥に収容
された油圧センサ、１８，１９はニツプルであ
り、これらは図示のように結合された状態でニツ
プル１８の遊離端を透孔１１に螺合することによ
り、前述のピストン・シリンダ機構１の背後に接
続される。そして、この接続状態において通油孔
１５を介して連通するシリンダ４の後部空間２０
と油圧センサ室１６とにわたつて圧力伝達用油を
封入するようになつている。 In FIG. 2, 14 is a hydraulic shock absorber, 15 is a small diameter oil hole provided in the hydraulic shock absorber 14, 16 is a hydraulic pressure sensor chamber, 17 is a hydraulic pressure sensor housed in the back of the hydraulic sensor 16, 18, 19 are nipples, which are connected to the rear of the aforementioned piston-cylinder mechanism 1 by screwing the free end of the nipple 18 into the through hole 11 in the coupled state as shown. In this connected state, the rear space 20 of the cylinder 4 communicates through the oil hole 15.
Pressure transmitting oil is sealed between the oil pressure sensor chamber 16 and the oil pressure sensor chamber 16.
なお、油圧センサ室１６の背後にはアンプ部２
１が設けられ、これから電線２２が延びている。 Note that an amplifier unit 2 is located behind the oil pressure sensor chamber 16.
1 is provided, from which an electric wire 22 extends.
以上のような本発明装置は、例えば、第３図に
示すように、砂杭造成用ケーシング２３の下端部
外側に、コーン９を下方に突出させ、上半部を保
護カバー２４で覆つた状態で取り付けられる。 For example, as shown in FIG. 3, the device of the present invention as described above has a cone 9 protruding downward from the outside of the lower end of the casing 23 for sand pile construction, and the upper half thereof is covered with a protective cover 24. Can be installed with.
砂杭造成用ケーシング２３の地中貫入に伴い、
コーン９に負荷（貫入抵抗）が作用すると、ピス
トン７が上方に押され、油圧センサ室１６内の油
圧が負荷の度合いに応じて高まるから、これを油
圧センサ１７で検出し、その電気信号を電線２２
により地上のオシログラフ等の測定・記録器２５
に送る。 With the penetration of the sand pile construction casing 23 into the ground,
When a load (penetration resistance) is applied to the cone 9, the piston 7 is pushed upward, and the oil pressure in the oil pressure sensor chamber 16 increases according to the degree of load. This is detected by the oil pressure sensor 17, and the electrical signal is output. Electric wire 22
Measurement and recording equipment such as oscilloscopes on the ground 25
send to
砂杭造成用ケーシング２３の地中貫入は、通
常、上端に装着した振動式貫入機を作動させなが
ら行われるので、コーン９の先端に作用するのは
衝撃的な力であり、後部空間２０内の油圧の上昇
は急激であるが、後部空間２０と油圧センサ室１
６とが小径の通油孔１５を介して連通しているこ
とにより、油圧センサ室１６内の油圧の急激な上
昇が押さえられるので、油圧センサ１７が破損す
る恐れはない。 Penetration of the sand pile construction casing 23 into the ground is normally carried out while operating a vibrating penetrating machine attached to the upper end. Although the rise in the oil pressure in the rear space 20 and the oil pressure sensor chamber 1 is rapid,
6 are in communication with each other through the small-diameter oil passage hole 15, so that a sudden increase in the oil pressure in the oil pressure sensor chamber 16 is suppressed, so there is no risk that the oil pressure sensor 17 will be damaged.
油圧センサ１７で検知される油圧は、振動式貫
入機の作動による振動の影響で第４図イに例示し
たように波状に振れるが、この波を解析すること
により、地盤の強度のみならず性状をも知ること
ができる。すなわち、同図ロに示すように、波の
振幅の大きいところは砂質、振幅の小さいところ
はシルト質ということになり、地盤強度は振幅の
中間値で示される。 The oil pressure detected by the oil pressure sensor 17 fluctuates in waves as shown in Figure 4A due to the influence of vibrations caused by the operation of the vibrating penetrating machine.By analyzing these waves, it is possible to determine not only the strength but also the properties of the ground. You can also know. In other words, as shown in Figure B, areas where the wave amplitude is large are sandy, and areas where the wave amplitude is small are silty, and the ground strength is indicated by the median value of the amplitude.
（発明の効果）
本発明の地盤強度検知装置は以上のようなもの
であつて、コーンの先端に大きな衝撃力が作用し
ても、シリンダの後部空間と油圧センサ室とが小
径の通油孔を介して連通していることにより、油
圧センサの破損が防止されるので、砂杭造成用ケ
ーシング等の地盤処理用地中貫入体の下端部に取
り付けて地中貫入体の貫入時に地盤の強度や性状
を検知するのに好適である。(Effects of the Invention) The ground strength detection device of the present invention is as described above, and even if a large impact force is applied to the tip of the cone, the rear space of the cylinder and the oil pressure sensor chamber are connected to the small diameter oil passage hole. Since the oil pressure sensor is prevented from being damaged by communicating through the Suitable for detecting properties.
第１図は本発明の一実施例におけるピストン・
シリンダ機構の縦断面図、第２図は第１図のピス
トン・シリンダ機構に接続される部分の縦断面
図、第３図は本発明装置の使用態様の一例を示す
側面図、第４図イは検知油圧の一例図、同図ロは
地盤性状図である。
図中、１：ピストン・シリンダ機構、２：シリ
ンダ部、３：ピストン部、４：シリンダ、７：ピ
ストン、８：ピストン棒、９：コーン、１４：油
圧緩衝器、１５：通油孔、１６：油圧センサ室、
１７：油圧センサ、２０：後部空間、２３：砂杭
造成用ケーシング。
FIG. 1 shows a piston in an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the cylinder mechanism, FIG. 2 is a longitudinal sectional view of the part connected to the piston/cylinder mechanism of FIG. Figure 1 shows an example of detected oil pressure, and Figure 2 shows a diagram of ground properties. In the figure, 1: Piston/cylinder mechanism, 2: Cylinder section, 3: Piston section, 4: Cylinder, 7: Piston, 8: Piston rod, 9: Cone, 14: Hydraulic shock absorber, 15: Oil hole, 16 : Oil pressure sensor room,
17: Oil pressure sensor, 20: Rear space, 23: Casing for sand pile construction.
Claims (1)
端にコーンを一体的に取り付けたピストン・シリ
ンダ機構におけるシリンダの後部空間を、油圧緩
衝器の小径の通油孔を介して油圧センサ室に連通
させ、前記シリンダの後部空間と油圧センサ室と
にわたり圧力伝達用油を封入したことを特徴とす
る地盤強度検知装置。1. The rear space of the cylinder in a piston-cylinder mechanism in which a cone is integrally attached to the tip of a piston rod protruding from one end of the cylinder is communicated with the oil pressure sensor chamber through a small-diameter oil hole of a hydraulic shock absorber. A ground strength detection device characterized in that oil for pressure transmission is sealed between the rear space of the cylinder and the oil pressure sensor chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21109284A JPS6192209A (en) | 1984-10-08 | 1984-10-08 | Ground strength detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21109284A JPS6192209A (en) | 1984-10-08 | 1984-10-08 | Ground strength detecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6192209A JPS6192209A (en) | 1986-05-10 |
| JPH0326730B2 true JPH0326730B2 (en) | 1991-04-11 |
Family
ID=16600277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21109284A Granted JPS6192209A (en) | 1984-10-08 | 1984-10-08 | Ground strength detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6192209A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2466773A (en) * | 2008-12-31 | 2010-07-07 | Itelegance Bvba | System and method for sand detection |
| CN106353180B (en) * | 2016-11-08 | 2023-04-28 | 中国工程物理研究院总体工程研究所 | Explosion wave simulation device with adjustable positive pressure acting time |
| CN108286250A (en) * | 2018-04-08 | 2018-07-17 | 中国铁路设计集团有限公司 | A kind of deep layer dynamic sounding energy test device and its test method |
| CN110095356B (en) * | 2019-04-25 | 2022-06-03 | 西安理工大学 | Dynamic counter-force measuring device under impact load effect |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829669Y2 (en) * | 1975-06-24 | 1983-06-29 | 日本電気ホームエレクトロニクス株式会社 | color tv station yuzuki |
| JPS5234167U (en) * | 1975-09-01 | 1977-03-10 |
-
1984
- 1984-10-08 JP JP21109284A patent/JPS6192209A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6192209A (en) | 1986-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0856163B1 (en) | Electroseismic technique for measuring the properties of rocks surrounding a borehole | |
| CA2021661C (en) | Method and system for vertical seismic profiling by measuring drilling vibrations | |
| CN107829725B (en) | A kind of water causes pressure break stress measurement and induces crack dynamic imaging integrating device | |
| US4455863A (en) | Sonic detection of gas leaks in underground pipes | |
| US4013905A (en) | Remote acoustic probe | |
| JP3143476B2 (en) | Strain detector | |
| CA2156223A1 (en) | Mwd surface signal detector having enhanced acoustic detection means | |
| JPH0326730B2 (en) | ||
| CN110671614B (en) | Simple leakage detection device for buried gas pressure pipeline | |
| CN111648769B (en) | A bored pile drilling device suitable for determining the depth of the boundary between upper soil and lower rock strata | |
| US4315428A (en) | Sensor for detecting particles in a fluid flow | |
| JP2884270B2 (en) | Underground sound detection sensor | |
| US6597633B1 (en) | Method for electrolinetic downhole logging | |
| CN205530202U (en) | Weight moves, rams effort and rams real -time synchronization monitor of volume of sinking under water | |
| JPH049885B2 (en) | ||
| JP3662007B2 (en) | Fixed piston sampler with cone function | |
| CN208777979U (en) | A kind of Directional Drilling returns and drags duct foreign matter warning device | |
| JPS62142291A (en) | acoustic logging device | |
| SU1174525A1 (en) | Apparatus for complex probing of saturated soils | |
| JPH01163389A (en) | Underground drilling device | |
| JP3875095B2 (en) | Dynamic behavior detector | |
| CN211013226U (en) | Deep water hydrophone structure with adjustable bandwidth | |
| JPH06193389A (en) | Bit abrasion detector | |
| CN208456584U (en) | One kind is with brill strip-type structure acoustic receiver energy converter | |
| SU1180452A1 (en) | Pneumatic earth punch |