EP1338704B1 - Mesurer la compression de couches de matériel granulaire - Google Patents

Mesurer la compression de couches de matériel granulaire Download PDF

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Publication number
EP1338704B1
EP1338704B1 EP03462001A EP03462001A EP1338704B1 EP 1338704 B1 EP1338704 B1 EP 1338704B1 EP 03462001 A EP03462001 A EP 03462001A EP 03462001 A EP03462001 A EP 03462001A EP 1338704 B1 EP1338704 B1 EP 1338704B1
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EP
European Patent Office
Prior art keywords
material layer
compaction
deformation
during
determined
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Expired - Lifetime
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EP03462001A
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German (de)
English (en)
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EP1338704A2 (fr
EP1338704A3 (fr
Inventor
István Subert
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Individual
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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

Definitions

  • the subject of the invention relates to a method for the in situ determination of the compaction rate of a granular material layer, containing a solid part, liquid, and also material in the gaseous phase e.g. soils, during which, first a determined amount of deformation work is exerted on the surface of the material layer by means of a measuring instrument and the deformation of the material layer is measured, then the water content of the material layer is determined; finally, from the deformation and the water content as measured the compaction rate of the material layer can be determined.
  • a method for the in situ determination of the compaction rate of a granular material layer containing a solid part, liquid, and also material in the gaseous phase e.g. soils
  • Another method used for the determination of the compaction rate of material layers is isotopic compaction measurement, in which, however, a radiation source is used for making the measurement.
  • a radiation source is used for making the measurement.
  • the basis of the invention was provided by the physical fact that if impacts are exerted on an area of determined size of a material layer then the material layer subjected to a force will become compacted.
  • the recognition that led to the procedure according to the invention was that the compaction rate of material layers in every case depends on how compact the material layer was before the force carrying out the compaction is exerted. In the case of a suitably compacted material layer the compaction taking place during the test is decidedly smaller than without any preliminary compaction. So in the case that we subject the material layer to the amount of compacting work that is normally accepted during other tests and we evaluate this in a way that is different from the known methods, then the task can be solved.
  • the invention relates to a method for the in situ determination of the compaction rate of a granular material layer, containing a solid part, liquid, and also material in the gaseous phase e.g. soils, during which, first a determined amount of deformation work is exerted on the surface of the material layer by means of a measuring instrument and the deformation of the material layer is measured, then the water content of the material layer is determined; finally, from the deformation and the water content, as measured the compaction rate of the material layer can be determined, which method is based on the principle said measuring instrument contains a measuring head and a falling weight that may be moved as compared to the measuring head, the material layer is subjected to the deformation impact work during, the on-site compaction with consecutive impacts of the falling weight of the equipment, and the deformation impact work is equal to the amount of the deformation impact work exerted during the compaction carried out in a Proctor Test.
  • a further realisation of the procedure according to the invention is that during the compaction pressure-stress of between 0.2-0.6 MPa, advantageously 0.3 MPa is exerted on the surface of the material layer.
  • the compaction of the material layer is carried out in the same place, without any movement of the falling weight equipment.
  • a body of mass 7-13 kg, practically 10 kg is used as a falling weight, as a measuring head we use a body that touches the surface of the granular material layer at a diameter of between 130-200 mm, advantageously 163 mm, e.g. a circular metal disc, furthermore the falling weight is dropped, without any damping, from a height of between 45-105 cm, practically 72 cm, onto the measuring head that is in contact with the surface of the granular layer under examination.
  • the advantage of the procedure according to the invention is that in the case that it is used the test compaction can be carried out at the site of the measurement at the same time as the measurement, so precise values can be obtained that provide the actual result of the on-site compaction, which values are not dependent on the density or the possible density fluctuation of the soil.
  • Another advantage is that the measurement can be carried out simply and quickly, furthermore, it does not require structural elements that are dangerous to health or emit dangerous radiation, which results in fewer supplementary costs in connection with the procedure.
  • Another advantageous feature is that during the procedure not only can data be obtained that relate to the compaction rate of the soil under examination but also the bearing capacity (dynamic modulus) of the soil can be reliably determined on the basis of the same series of measurements.
  • Another favourable feature is that the procedure can be carried out anywhere, e.g. even in a work trench, due to the construction of the measuring device it is suitable for taking a great deal of measurements quickly and precisely, in other words with a great deal of efficiency.
  • Another economic advantage is that with the novel procedure the measurements can be carried out with lower costs, which results in further savings.
  • the duration of the construction work can be shortened, which has a favourable effect on the length of road surface that can be made in the available amount of time.
  • the falling weight was dropped from a height of 72 cm onto the measuring head and when carrying out the 18 impacts they were grouped into six groups of three, in turn the degree of deformation within the groups was averaged. From the averaged deformation values we determined the relative compaction rate, then we determined the water content of the material layer under examination in a way that is known in itself. The on the basis of the water content we carried out a correction and determined the compaction rate of the material layer.
  • the procedure according to the invention can be used to good effect during the on-site determination of the compaction rate of various granular material layers containing three material phases.

Claims (8)

  1. Procédé pour la détermination in situ du taux de compactage d'une couche de matériau granulaire contenant une partie solide, un liquide, et également un matériau en phase gazeuse, par exemple des salissures, pendant lequel, tout d'abord une quantité déterminée d'un travail de déformation est exercée sur la surface de la couche de matériau par l'intermédiaire d'un instrument de mesure et la déformation de la couche de matériau est mesurée, puis la teneur en eau de la couche de matériau est déterminée, enfin, à partir de la déformation et de la teneur en eau mesurés, le taux de compactage de la couche de matériau peut être déterminé, dans lequel ledit instrument de mesure contient une tête de mesure et un poids en chute libre qui peut être déplacé par comparaison à la tête de mesure, la couche de matériau étant soumise au travail d'impact de déformation pendant le compactage sur site à l'aide d'impacts consécutifs du poids en chute libre de l'équipement, et le travail d'impact de déformation est égal à la quantité du travail d'impact de déformation exercé pendant le compactage effectué dans un essai Proctor.
  2. Procédé selon la revendication 1, caractérisé en ce que pendant le compactage, la force de pression comprise entre 0,2 et 0,6 MPa, de manière avantageuse de 0,3 MPa, est exercée sur la surface de la couche de matériau.
  3. Procédé selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que, pendant les chutes effectuées au cours du procédé du compactage sur site, on crée une caractéristique de déformation spécifique à partir de la quantité de l'impression de la couche de matériau granulaire.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le compactage de la couche de matériau est effectué au même emplacement, sans aucun déplacement de l'équipement de poids en chute libre.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'un corps d'une masse de 7 à 13 kg, en pratique 10 kg, est utilisé en tant que poids en chute libre.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'en tant que tête de mesure, on utilise un corps qui touche la surface de la couche de matériau granulaire au niveau d'un diamètre compris entre 130 et 200 mm, de manière avantageuse 163 mm, par exemple un disque métallique circulaire.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le poids en chute libre est amené à chuter, sans aucun amortissement, d'une hauteur comprise entre 45 et 105 cm, de manière pratique 72 cm, sur la tête de mesure qui est en contact avec la surface de la couche granulaire en cours d'examen.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que, avant le début ou après l'achèvement du compactage, un échantillon de la couche granulaire en cours d'examen est prélevé et la teneur en eau de la couche granulaire est déterminée d'une manière connue en soi, et lors de la détermination du taux de compactage, la valeur de la teneur en eau est également prise en compte.
EP03462001A 2002-02-26 2003-02-21 Mesurer la compression de couches de matériel granulaire Expired - Lifetime EP1338704B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU0200715A HU225806B1 (hu) 2002-02-26 2002-02-26 Eljárás szemcsés anyagrétegek tömörségének helyszíni mérésére
HU0200715 2002-02-26

Publications (3)

Publication Number Publication Date
EP1338704A2 EP1338704A2 (fr) 2003-08-27
EP1338704A3 EP1338704A3 (fr) 2004-08-25
EP1338704B1 true EP1338704B1 (fr) 2006-03-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03462001A Expired - Lifetime EP1338704B1 (fr) 2002-02-26 2003-02-21 Mesurer la compression de couches de matériel granulaire

Country Status (4)

Country Link
EP (1) EP1338704B1 (fr)
AT (1) ATE321915T1 (fr)
DE (1) DE60304313T2 (fr)
HU (1) HU225806B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007454A2 (fr) * 2008-07-17 2010-01-21 Subert Istvan Procédé permettant de déterminer in situ la compacité de couches de substances granuleuses et dispositif permettant d'exécuter le procédé

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010080941A2 (fr) * 2009-01-09 2010-07-15 Geopier Foundation Company, Inc. Appareil et procédé d'essais de module en bâtiment
CN105675438B (zh) * 2016-01-20 2018-09-18 中国十九冶集团有限公司 路堤强夯后平均压实度的确定方法
CN108007861A (zh) * 2017-12-29 2018-05-08 长安大学 水稳基层压实度快速测定仪

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1063933A1 (ru) * 1982-09-16 1983-12-30 Всесоюзный Научно-Исследовательский Институт По Монтажным И Специальным Строительным Работам Способ определени максимальной плотности грунта
GB9017474D0 (en) * 1990-08-09 1990-09-26 Bsp Int Foundation Device
DE10036310A1 (de) * 2000-07-26 2002-02-07 Bresch Helmut Fallgewicht mit Gleitlagerführung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007454A2 (fr) * 2008-07-17 2010-01-21 Subert Istvan Procédé permettant de déterminer in situ la compacité de couches de substances granuleuses et dispositif permettant d'exécuter le procédé
WO2010007454A3 (fr) * 2008-07-17 2011-01-20 Subert Istvan Procédé permettant de déterminer in situ la compacité de couches de substances granuleuses et dispositif permettant d'exécuter le procédé
CN102132141A (zh) * 2008-07-17 2011-07-20 伊什特万·苏贝特 原地测定粒状材料层的密实度的方法和实施该方法的装置
CN102132141B (zh) * 2008-07-17 2013-12-04 伊什特万·苏贝特 原地测定粒状材料层的密实度的方法和实施该方法的装置

Also Published As

Publication number Publication date
DE60304313D1 (de) 2006-05-18
HU225806B1 (hu) 2007-09-28
HU0200715D0 (fr) 2002-05-29
HUP0200715A2 (hu) 2004-05-28
ATE321915T1 (de) 2006-04-15
DE60304313T2 (de) 2006-11-23
EP1338704A2 (fr) 2003-08-27
EP1338704A3 (fr) 2004-08-25

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