GB2297849A - Portable soil strength testing device - Google Patents

Portable soil strength testing device Download PDF

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Publication number
GB2297849A
GB2297849A GB9502601A GB9502601A GB2297849A GB 2297849 A GB2297849 A GB 2297849A GB 9502601 A GB9502601 A GB 9502601A GB 9502601 A GB9502601 A GB 9502601A GB 2297849 A GB2297849 A GB 2297849A
Authority
GB
United Kingdom
Prior art keywords
penetration
soil
testing device
strength testing
rod
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.)
Granted
Application number
GB9502601A
Other versions
GB9502601D0 (en
GB2297849B (en
Inventor
Kevin John Lindsay Stone
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
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9502601A priority Critical patent/GB2297849B/en
Publication of GB9502601D0 publication Critical patent/GB9502601D0/en
Publication of GB2297849A publication Critical patent/GB2297849A/en
Application granted granted Critical
Publication of GB2297849B publication Critical patent/GB2297849B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • G01N3/48—Investigating hardness or rebound hardness by performing impressions under impulsive load by indentors, e.g. falling ball
    • 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
    • G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid

Abstract

A portable device for determining the strength of soil samples, comprises a mechanical drive 3 for driving a penetration rod 1 with a conical tip 2 at a selected speed into a soil sample 6, means 5 for measuring penetration load of the conical tip into a soil sample 6, means 4 for measuring the penetration depth of the conical tip into the soil, means enabling a continuous recording of the penetration load and depth to be made, and a mechanism 7 for releasing the penetration rod to fall under its own weight. The conical tip 2 may be replaced by conical tips of other shapes and sizes.

Description

A PORTABLE SOIL STRENGTH MEASURING DEVICE This invention relates to a device for deducing the strength of soil.
The most commonly used soil classification tests are the Atterberg limit tests. These simple tests provide measurement of the water content of soil at two rather crudely specified strengths.
According to the present invention there is a device comprising of a mechanically driven penetration rod (with interchangeable conical tips), a means for measuring penetration load of the conical tip into a soil sample, a means of measuring the penetration depth of the conical tip into the soil, a means of enabling a continuous recording of the penetration load and depth to be made and a mechanism for releasing the penetration rod to fall under its own weight.
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing: Figure 1 shows schematically (side elevation) the soil testing device Referring to the drawing the device comprises of a penetration rod (1) with interchangeable conical tips of various sizes and shapes (2), a means of driving the penetration rod in the vertical direction at specified speeds (2), a means of measuring the vertical displacement rate of the penetrating rod (4), a means of continuously measuring the penetration force (5) generated as the cone penetrates the soil sample (6) and a means of releasing the penetration rod to fall under the self weight of the rod and cone assemblage (7).
In order to perform a penetration test a sample of soil (6) is placed on the load measuring platform (5) and the load and displacement measurement devices are zeroed. A penetration velocity is selected and the penetration rod (1) and cone (2) assemblage are driven continuously into the soil sample. During the penetration the vertical displacement transducer (4) and the load transducer (5) provide a continuous record of the respective displacement and penetration force.

Claims (6)

1 A portable soil strength testing device comprising of a mechanically driven penetration rod (with interchangeable conical tips), a means for measuring penetration load of the conical tip into a soil sample, a means of measuring vertical displacement of the conical tip into the soil sample, a means of enabling a continuous recording of the penetration load and depth to be made and a mechanism for releasing the penetration rod to fall under its own weight.
2 A soil strength testing device as claimed in Claim 1, wherein a means of vertically translating the penetration rod at a selected uniform speeds is provided.
3 A soil strength testing device as claimed in Claim 1 or 2 wherein a means is provided to measure the penetration force as the penetration rod and cone assemblage is driven into the soil sample.
4 A soil strength testing device as claimed in Claim 2 or Claim 3 wherein a means of monitoring the vertical displacement of the penetration rod is provided.
5 A soil strength testing device as claimed in Claim 4 wherein a means is provided to continuously record the vertical displacement of the penetration rod and cone assemblage and the penetration loads generated by driving this assemblage into a soil sample.
6 A soil strength testing device substantially as described herein with reference to Figure 1 in the accompanying drawing.
GB9502601A 1995-02-10 1995-02-10 A portable soil strength measuring device Expired - Fee Related GB2297849B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9502601A GB2297849B (en) 1995-02-10 1995-02-10 A portable soil strength measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9502601A GB2297849B (en) 1995-02-10 1995-02-10 A portable soil strength measuring device

Publications (3)

Publication Number Publication Date
GB9502601D0 GB9502601D0 (en) 1995-03-29
GB2297849A true GB2297849A (en) 1996-08-14
GB2297849B GB2297849B (en) 1998-04-15

Family

ID=10769383

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9502601A Expired - Fee Related GB2297849B (en) 1995-02-10 1995-02-10 A portable soil strength measuring device

Country Status (1)

Country Link
GB (1) GB2297849B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2443647A (en) * 2006-11-10 2008-05-14 Univ Belfast Method and apparatus for determining the plastic limit of soil
CN103149341A (en) * 2013-02-04 2013-06-12 辽宁工程技术大学 Consolidation and penetration measuring device
CN103398739A (en) * 2013-07-24 2013-11-20 北京盈胜泰科技术有限公司 Handheld soil parameter measurement device and soil parameter measurement method
DE102021121451A1 (en) 2021-08-18 2023-02-23 Hochschule Osnabrück, Körperschaft des öffentlichen Rechts Process for quality testing of the material of coarse-grained floors, especially sports floors

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061021A (en) * 1977-01-28 1977-12-06 Iowa State University Research Foundation, Inc. Recording soil penetrometer
US4726239A (en) * 1987-02-09 1988-02-23 Mcclelland Engineers, Inc. Soil analyzer and penetrator
WO1992010753A1 (en) * 1990-12-12 1992-06-25 Bernard Castagner Dynamic pyrotechnical penetrometer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061021A (en) * 1977-01-28 1977-12-06 Iowa State University Research Foundation, Inc. Recording soil penetrometer
US4726239A (en) * 1987-02-09 1988-02-23 Mcclelland Engineers, Inc. Soil analyzer and penetrator
WO1992010753A1 (en) * 1990-12-12 1992-06-25 Bernard Castagner Dynamic pyrotechnical penetrometer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2443647A (en) * 2006-11-10 2008-05-14 Univ Belfast Method and apparatus for determining the plastic limit of soil
WO2008056170A1 (en) * 2006-11-10 2008-05-15 The Queen's University Of Belfast Method and apparatus for determining the plastic limit of soil
CN103149341A (en) * 2013-02-04 2013-06-12 辽宁工程技术大学 Consolidation and penetration measuring device
CN103398739A (en) * 2013-07-24 2013-11-20 北京盈胜泰科技术有限公司 Handheld soil parameter measurement device and soil parameter measurement method
CN103398739B (en) * 2013-07-24 2015-10-28 北京安赛博技术有限公司 A kind of Handheld soil parameter measuring apparatus and soil parameters measuring method
DE102021121451A1 (en) 2021-08-18 2023-02-23 Hochschule Osnabrück, Körperschaft des öffentlichen Rechts Process for quality testing of the material of coarse-grained floors, especially sports floors

Also Published As

Publication number Publication date
GB9502601D0 (en) 1995-03-29
GB2297849B (en) 1998-04-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110210