EP2563974B1 - Procédé et dispositif de mesure des caractéristiques mécaniques du sol - Google Patents

Procédé et dispositif de mesure des caractéristiques mécaniques du sol Download PDF

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Publication number
EP2563974B1
EP2563974B1 EP11745468.6A EP11745468A EP2563974B1 EP 2563974 B1 EP2563974 B1 EP 2563974B1 EP 11745468 A EP11745468 A EP 11745468A EP 2563974 B1 EP2563974 B1 EP 2563974B1
Authority
EP
European Patent Office
Prior art keywords
hypodermic needle
cable
membrane cell
tube
soil
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.)
Not-in-force
Application number
EP11745468.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2563974A1 (fr
Inventor
Khalil Fahmy Iskander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2563974A1 publication Critical patent/EP2563974A1/fr
Application granted granted Critical
Publication of EP2563974B1 publication Critical patent/EP2563974B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/006—Measuring wall stresses in the borehole

Definitions

  • the present invention relates to a method and a device for measuring mechanical characteristics of the soil.
  • the device is of the membrane cell type associated with a piezometer constituted by a hypodermic needle menu of a sensor.
  • a process according to the preamble of claim 1 is known from FR 2696003 A1 .
  • the method of measuring mechanical characteristics of the ground by the aforementioned apparatuses agrees on the principle independent of the method of placing the devices.
  • the methods of placement are either a device with a prior drilling or a driving device or auto driller.
  • the process is carried out by supplying the membrane cell with a liquid or gas under pressure. Increasing the liquid pressure or gas causes the membrane cell to swell. The bearing capacity of the soil is deduced from the relationship between the pressure exerted and the swelling at the central level of the membrane cell.
  • the device of the inclined piezometer membrane apparatus makes it possible to drive a piezometer into the ground near and at the central level of the membrane cell by an inclined piston. But, it takes a very strong load to overcome the high resistance of the soil which prevents the easy insertion of the piston operating tube and may damage the other tubes of the system.
  • the method comprises driving a membrane cell (7) into the ground or by drilling into which a liquid or a gas is introduced under pressure to measure the increase in volume of the membrane cell (7) as a function of the pressure exerted.
  • the method according to the invention consists in drawing from the ground, from a revolver (8), in a direction inclined from the part just above the membrane cell (7), a hypodermic needle (5) menu from a sensor to the central level (6) of the maximum deformations of the membrane cell (7) and to measure the change in the the value of the interstitial pressure at the central level (6) and in the vicinity of the membrane cell (7) as a function of the pressure in the membrane cell (7).
  • the device for carrying out the method is of the type comprising a vertical tube (9) comprising a membrane cell (7), and consists in introducing into the tube (9) a vertical tube (10) of smaller diameter, to be supported on a support (1) and provided with a guide (3), to ensure the tip of a hypodermic needle (5) facing the center of hole (2) covered by rubber.
  • the tube (10) comprises an inclined revolver (8) with respect to the axis of the vertical tube (9) serving intermediate between the membrane cell (7) and the ground surface.
  • the firing of the hypodermic needle (5) is performed by pulling a cable (14) which connects the trigger (12) of the revolver (8) to the surface of the ground.
  • the hypodermic needle sensor (5) is connected by a cable (16) to a computer (15) for recording the measurement values, and also the needle (5) is connected. by another cable (17) for holding the hypodermic needle (5) in the desired position, when projected, by means of a knot (4) on the cable (17) at a distance from the hypodermic needle ( 5) equal to the length of the path from its initial position to the measurement level (6).
  • the cable (17) also serves to remove the hypodermic needle (5) to its initial position in the revolver (8) by mechanical or manual removal by the cable (17).
  • the end of the needle (5) is fitted by a capsule that sticks and remains in the ground during removal of the hypodermic needle (5) by the cable (17) to prevent the hypodermic needle (5) from sticks in the ground.
  • the withdrawal of the tube (10) is performed by pulling the cable (11).
  • the measurement process is repeated every meter up to the depth required underground.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Soil Sciences (AREA)
  • Geophysics (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Measuring Fluid Pressure (AREA)
EP11745468.6A 2010-04-30 2011-04-29 Procédé et dispositif de mesure des caractéristiques mécaniques du sol Not-in-force EP2563974B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2010/0269A BE1019322A3 (fr) 2010-04-30 2010-04-30 Procede et dispositif de mesure des caracteristiques mecaniques du sol.
PCT/BE2011/000026 WO2011134028A1 (fr) 2010-04-30 2011-04-29 Procédé et dispositif de mesure des caractéristiques mécaniques du sol

Publications (2)

Publication Number Publication Date
EP2563974A1 EP2563974A1 (fr) 2013-03-06
EP2563974B1 true EP2563974B1 (fr) 2014-06-11

Family

ID=43607681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11745468.6A Not-in-force EP2563974B1 (fr) 2010-04-30 2011-04-29 Procédé et dispositif de mesure des caractéristiques mécaniques du sol

Country Status (7)

Country Link
EP (1) EP2563974B1 (zh)
CN (1) CN103201434B (zh)
BE (1) BE1019322A3 (zh)
CA (1) CA2792313C (zh)
DE (1) DE112011101504T5 (zh)
GB (1) GB201215550D0 (zh)
WO (1) WO2011134028A1 (zh)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408481A (en) * 1982-03-12 1983-10-11 The United States Of America As Represented By The Secretary Of The Air Force Pore pressure probe assembly and two-stage emplacement thereof
FR2696003B1 (fr) 1992-09-21 1995-03-03 Iskander Khalil Procédé et dispositif pour mesurer des caractéristiques mécaniques du sol.
BRPI0509003A (pt) * 2004-03-23 2007-08-07 Benthic Geotech Pty Ltd penetrÈmetro esférico para medir in situ as propriedades do solo macio e método para medir in situ as propriedades do solo macio
DE102004016277A1 (de) * 2004-03-29 2005-10-20 Gbm Wiebe Gleisbaumaschinen Gm Vorrichtung und Verfahren zur Ermittlung des Zustandes des Oberbaus von Schienenwegen, Straßen bzw. Erdschichten
CN101575847B (zh) * 2009-06-02 2011-06-15 中铁第四勘察设计院集团有限公司 有效应力铲

Also Published As

Publication number Publication date
GB201215550D0 (en) 2012-10-17
EP2563974A1 (fr) 2013-03-06
WO2011134028A1 (fr) 2011-11-03
DE112011101504T5 (de) 2013-11-28
CN103201434B (zh) 2015-08-19
CA2792313C (fr) 2014-08-19
WO2011134028A8 (fr) 2012-12-13
CN103201434A (zh) 2013-07-10
BE1019322A3 (fr) 2012-06-05
CA2792313A1 (fr) 2011-11-03

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