FR2584186A1 - Device for measuring characteristics of soils by static/dynamic penetration - Google Patents
Device for measuring characteristics of soils by static/dynamic penetration Download PDFInfo
- Publication number
- FR2584186A1 FR2584186A1 FR8509960A FR8509960A FR2584186A1 FR 2584186 A1 FR2584186 A1 FR 2584186A1 FR 8509960 A FR8509960 A FR 8509960A FR 8509960 A FR8509960 A FR 8509960A FR 2584186 A1 FR2584186 A1 FR 2584186A1
- Authority
- FR
- France
- Prior art keywords
- rods
- spring
- soils
- hollow
- static
- 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.)
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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
-
- 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
- G01N3/40—Investigating hardness or rebound hardness
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- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Soil Sciences (AREA)
- Biochemistry (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)
Abstract
Description
L 'invention se rapporte à un procédé de mesure des caractéristiques mécaniques des sols naturels en place et plus particulèrement aux procédés de pénétration statique et dynamique. The invention relates to a method for measuring the mechanical characteristics of natural soils in place and more particularly to methods of static and dynamic penetration.
II est bien connu de mesurer la résistance du sol par battage d'une tige métallique : connaissant l'énergie libérée par la chute du mouton et l'enfoncement par coup on calcule la résistance du sol compte-tenu de divers coefficients de pertes d'énergie. It is well known to measure the resistance of the soil by threshing a metal rod: knowing the energy released by the fall of the sheep and the ramming, the resistance of the soil is calculated taking into account various loss coefficients of energy.
II est bien connu de mesurer la résistance du sol, avec une précision meilleure que par battage, en enfonçant une tige métallique par fonçage à l'aide d'un vérin et en mesurant séparément la résistance de pointe. L 'appareil est un pénétromètre statique, caractérisé par la nécessité de déplacer une charge de réaction suffisante pour enfoncer les tiges, ce pour quoi on utilise des camions de 10 à 20 tonnes. It is well known to measure the resistance of the ground, with a better precision than by threshing, by driving in a metal rod by jacking with the aid of a jack and by separately measuring the peak resistance. The device is a static penetrometer, characterized by the need to move a reaction load sufficient to drive in the rods, which is why trucks of 10 to 20 tonnes are used.
La présente invention vise à réaliser des essais de pénétration statique alternant avec des essais de pénétration dynamique sans qu'il soit nécessaire de mettre en jeu une charge de réaction importante. The present invention aims to carry out static penetration tests alternating with dynamic penetration tests without the need to involve a significant reaction load.
Le procédé selon l'invention. qui comprend d'une manière classique : - un train de tiges creuses. The method according to the invention. which conventionally includes: - a train of hollow rods.
connectées successivement au fur et à mesure de l'enfoncement dans le sol.successively connected as they sink into the ground.
- un train de tiges pleines d'un diamètre suffisant pour coulisser librement à l'intérieur des tiges creuses.- a train of solid rods of sufficient diameter to slide freely inside the hollow rods.
- une pointe solidaire des tiges pleines placée au bas de celles-ci.- a point secured to the solid rods placed at the bottom thereof.
- une tête de battage solidaire des tiges.- a threshing head secured to the rods.
- un mouton.- a sheep.
est en principe caractérisé en ce que la tête de battage est rigidement solidaire des tiges creuses et élastiquement solidaire des tiges pleines par interposition d'un "ressort" au sens général du terme (déformation d'un métal, compression d'un gaz, vérin etc...).is in principle characterized in that the threshing head is rigidly secured to the hollow rods and elastically secured to the solid rods by the interposition of a "spring" in the general sense of the term (deformation of a metal, compression of a gas, cylinder etc ...).
Le "ressort" lie en fait la pointe à la surface latérale extérieure des tiges et peut en principe être placé au voisinage de la pointe. The "spring" actually links the tip to the outer lateral surface of the rods and can in principle be placed in the vicinity of the tip.
Un dispositif simple de mesure de la longueur du "ressort", dont on connait la rigidité, permet de calculer l'effort exercé sur la pointe solidaire des tiges pleines. La réaction à cet effort est transmise par la tête de battage aux tiges creuses qui sont maintenues par frottement latéral "négatif " du sol. A simple device for measuring the length of the "spring", the rigidity of which is known, makes it possible to calculate the force exerted on the point integral with the solid rods. The reaction to this force is transmitted by the threshing head to the hollow stems which are maintained by "negative" lateral friction of the ground.
L'essai consiste à mesurer l'enfoncement par coup de mouton, qui permet de calculer la résistance dynamique du sol, et à mesurer entre deux coups de mouton l'effort statique exercé sur la pointe par le "ressort". The test consists of measuring the push-in, which allows the dynamic resistance of the soil to be calculated, and measuring between two strokes the static force exerted on the tip by the "spring".
Le procédé permet ainsi de mesurer la résistance dynamique du sol et sa résistance statique de pointe sans nécessiter la mobilisation de charges de réaction importantes. The method thus makes it possible to measure the dynamic resistance of the soil and its peak static resistance without requiring the mobilization of significant reaction charges.
D'autres particularités et avantages de l'invention apparaitront au cours de la descrF ption qui va suivre, laquelle, faite en référence au dessin annexé donné à titre d'exemple non limita tir, fera bien comprendre comment la présente invention peut être mise en pratique. Other features and advantages of the invention will become apparent during the description which follows, which, made with reference to the attached drawing given by way of non-limiting example, will make it clear how the present invention can be implemented. convenient.
La figure unique représente une coupe axiale du dispositif sur laquelle on peut voir les tiges creuses C de 5 à 70 mm de diamètre extérieur et les tiges pleines T solidaires de la pointe P en cours de pénétration dans le sol S. jusqu'à une profondeur de 5 à 50 m. Les tiges creuses C sont vissées sur la tête de battage B dans laquelle est placé le ressort R qui permet un déplacement relatif de 1 à 100 mm de la pointe P par rapport aux tiges creuses C. The single figure shows an axial section of the device on which we can see the hollow rods C from 5 to 70 mm outside diameter and the solid rods T integral with the point P being penetrated into the ground S. to a depth from 5 to 50 m. The hollow rods C are screwed onto the threshing head B in which the spring R is placed which allows a relative displacement of 1 to 100 mm from the point P relative to the hollow rods C.
La chute du mouton M de 5 à 500 kg provoque l'enfoncement des tiges creuses C qui viennent buter sur la pointe P qui est ainsi entrainée, le ressort R étant comprime. The fall of the sheep M from 5 to 500 kg causes the hollow rods C which sink against the tip P which is thus driven, the spring R being compressed.
Pendant le relevage et la nouvelle chute du mouton (durée 0,3 à 5 secondes) le ressort R se détend et la pointe P continue à s'enfonce
Jusqu'à ce que la réaction du sol Q soit égale à l'effort de compression du ressort. Cet effort est transmis aux tiges creuses C sur la surface latérale extérieure desquelles le sol exerce un frottement latéral négatif Fqui équilibre la force Q. During the raising and the new fall of the sheep (duration 0.3 to 5 seconds) the spring R relaxes and the point P continues to sink
Until the reaction of the soil Q is equal to the compression force of the spring. This force is transmitted to the hollow rods C on the external lateral surface from which the ground exerts a negative lateral friction F which balances the force Q.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8509960A FR2584186B1 (en) | 1985-06-28 | 1985-06-28 | DEVICE FOR MEASURING THE CHARACTERISTICS OF SOILS BY STATIC-DYNAMIC PENETRATION |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8509960A FR2584186B1 (en) | 1985-06-28 | 1985-06-28 | DEVICE FOR MEASURING THE CHARACTERISTICS OF SOILS BY STATIC-DYNAMIC PENETRATION |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2584186A1 true FR2584186A1 (en) | 1987-01-02 |
FR2584186B1 FR2584186B1 (en) | 1989-05-26 |
Family
ID=9320802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8509960A Expired FR2584186B1 (en) | 1985-06-28 | 1985-06-28 | DEVICE FOR MEASURING THE CHARACTERISTICS OF SOILS BY STATIC-DYNAMIC PENETRATION |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2584186B1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2670582A1 (en) * | 1990-12-12 | 1992-06-19 | Castagner Bernard | PYROTECHNIC DYNAMIC PENETROMETER. |
FR2696004A1 (en) * | 1992-09-21 | 1994-03-25 | Colas Sa | Plate type soil test apparatus and vehicle equipped with such apparatus. |
US5591902A (en) * | 1990-12-12 | 1997-01-07 | Castagner; Bernard | Dynamic pyrotechnical penetrometer |
EP2535460A1 (en) * | 2011-06-16 | 2012-12-19 | Hydro Geotechnique | Device for measuring the resistance to ground penetration |
WO2019016448A1 (en) | 2017-07-18 | 2019-01-24 | Equatech.R&D | Static penetrometer and associated measurement method |
WO2019034822A1 (en) * | 2017-08-18 | 2019-02-21 | Equatech.R&D | Static penetrometer for evaluating the liquefiable character of a soil and associated method |
EP3683360A1 (en) | 2019-01-18 | 2020-07-22 | Equatech.R&D | Static penetrometer with offset compressing system and use of such a penetrometer |
EP3835487A1 (en) | 2019-12-13 | 2021-06-16 | Equatech.R&D | Self-drilling static penetrometer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB681626A (en) * | 1949-06-16 | 1952-10-29 | Frankignoul Pieux Armes | Improvements in or relating to soil-testing apparatus |
FR1095398A (en) * | 1953-12-01 | 1955-06-01 | Device for the deep reconnaissance of foundation soils | |
GB1176595A (en) * | 1968-09-16 | 1970-01-07 | Shell Int Research | Method and means for determining soil resistance of subsurface layers. |
-
1985
- 1985-06-28 FR FR8509960A patent/FR2584186B1/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB681626A (en) * | 1949-06-16 | 1952-10-29 | Frankignoul Pieux Armes | Improvements in or relating to soil-testing apparatus |
FR1095398A (en) * | 1953-12-01 | 1955-06-01 | Device for the deep reconnaissance of foundation soils | |
GB1176595A (en) * | 1968-09-16 | 1970-01-07 | Shell Int Research | Method and means for determining soil resistance of subsurface layers. |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2670582A1 (en) * | 1990-12-12 | 1992-06-19 | Castagner Bernard | PYROTECHNIC DYNAMIC PENETROMETER. |
WO1992010753A1 (en) * | 1990-12-12 | 1992-06-25 | Bernard Castagner | Dynamic pyrotechnical penetrometer |
US5591902A (en) * | 1990-12-12 | 1997-01-07 | Castagner; Bernard | Dynamic pyrotechnical penetrometer |
AU677160B2 (en) * | 1990-12-12 | 1997-04-17 | Bernard Castagner | Dynamic pyrotechnical penetrometer |
FR2696004A1 (en) * | 1992-09-21 | 1994-03-25 | Colas Sa | Plate type soil test apparatus and vehicle equipped with such apparatus. |
EP0589772A1 (en) * | 1992-09-21 | 1994-03-30 | Colas S.A. | Plate apparatus for mechanical testing of soils and vehicle equipped with this apparatus |
EP2535460A1 (en) * | 2011-06-16 | 2012-12-19 | Hydro Geotechnique | Device for measuring the resistance to ground penetration |
FR2976669A1 (en) * | 2011-06-16 | 2012-12-21 | Hydro Geotechnique | DEVICE FOR MEASURING RESISTANCE TO PENETRATION OF A SOIL |
WO2019016448A1 (en) | 2017-07-18 | 2019-01-24 | Equatech.R&D | Static penetrometer and associated measurement method |
FR3069324A1 (en) * | 2017-07-18 | 2019-01-25 | Pierre Riegel | STATIC PENETROMETER AND ASSOCIATED MEASUREMENT METHOD |
WO2019034822A1 (en) * | 2017-08-18 | 2019-02-21 | Equatech.R&D | Static penetrometer for evaluating the liquefiable character of a soil and associated method |
FR3070170A1 (en) * | 2017-08-18 | 2019-02-22 | Pierre Riegel | STATIC PENETROMETER FOR THE EVALUATION OF THE LIQUEFIABLE CHARACTER OF A SOIL AND ASSOCIATED METHOD |
JP2020531721A (en) * | 2017-08-18 | 2020-11-05 | エクアテク.アール アンド ディー | Static penetrometers and related methods for assessing the liquefaction properties of soil |
EP3683360A1 (en) | 2019-01-18 | 2020-07-22 | Equatech.R&D | Static penetrometer with offset compressing system and use of such a penetrometer |
FR3091881A1 (en) | 2019-01-18 | 2020-07-24 | Equatech.R&D | Static penetrometer with a remote compressible system and use of such a penetrometer |
EP3835487A1 (en) | 2019-12-13 | 2021-06-16 | Equatech.R&D | Self-drilling static penetrometer |
FR3104618A1 (en) | 2019-12-13 | 2021-06-18 | Equatech.R&D | Self-drilling static penetrometer |
Also Published As
Publication number | Publication date |
---|---|
FR2584186B1 (en) | 1989-05-26 |
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