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Method for on-site measurement of rock compressive strength

A technology of compressive strength and on-site measurement, which is applied in the field of geotechnical engineering, can solve the problem that the efficiency of rock penetration depth is greatly affected, and achieve the effect of avoiding manual misjudgment and improving survey efficiency

Inactive Publication Date: 2021-02-19
连云港市建设工程质量检测中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a method for on-site measurement of rock compressive strength to overcome the defect that rock properties have a great influence on the efficiency of construction judgment of rock penetration depth in the prior art

Method used

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  • Method for on-site measurement of rock compressive strength
  • Method for on-site measurement of rock compressive strength
  • Method for on-site measurement of rock compressive strength

Examples

Experimental program
Comparison scheme
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Embodiment

[0030] A method for measuring rock compressive strength on site, the test steps comprising:

[0031] 1. Fix the instrument on a flat and hard ground (such as concrete pavement) or other flat rocks, and level it. Clean the two guide rods carefully and apply lubricating oil.

[0032] 2. Place the rock sample in the middle of the lower platen and cover the upper platen. If the rock sample is a core, the height should not exceed 10cm. Tighten the fixing nut of the lower pressure plate to fix the rock sample, and use the depth gauge to measure the initial depth of the rock sample;

[0033] 3. Adjust the measuring nail so that it just touches the surface of the rock sample, and place the block on the measuring nail.

[0034] 4. Raise the weight to the predetermined height, release the pull rope, and the weight hits the nailing pressure plate vertically along the guide rod. Adjust the fall distance according to the measured penetration depth, so that the penetration depth is distr...

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Abstract

The invention discloses a method for on-site measurement of rock compressive strength, which comprises the following test steps of fixing an instrument on a flat and high-hardness ground or other flatrocks, leveling, carefully cleaning two guide rods, coating lubricating oil, placing a rock sample in the middle of a lower pressing plate, covering the upper pressing plate to obtain a rock core ofwhich the height does not exceed 10cm, tightening a lower pressing plate fixing nut to fix the rock sample, measuring the initial depth of the rock sample by using a depth gauge, adjusting a measuringnail to just contact the surface of the rock sample, placing a cushion block on the measuring nail, lifting a heavy hammer to a preset height, releasing a pull rope, vertically hitting a shoot nail bearing plate by the heavy hammer along a guide rod, and installing automatic collection equipment on the instrument. The compressive strength is read in real time, and a test result is uploaded in real time; through on-site direct testing, the sample can be a rock block or a rock core, the investigation efficiency is effectively improved, and for bored pile construction, the strength of the bearing stratum can be quickly judged on site through the method, and manual misjudgment is avoided.

Description

technical field [0001] The invention relates to a method for measuring rock compressive strength on site, belonging to the technical field of geotechnical engineering. Background technique [0002] At present, in geotechnical engineering investigation and construction, the basic test methods for the compressive strength of rock taken out of boreholes are: saturated uniaxial test method and point load test method, which need to take cores or rock blocks to the laboratory for testing. It has a great influence on the efficiency of judging rock properties on site and judging the depth of rock penetration during construction. Contents of the invention [0003] The invention provides a method for measuring rock compressive strength on site to overcome the defect in the prior art that rock properties have a great influence on the efficiency of judging the depth of rock penetration during construction. [0004] In order to solve the problems of the technologies described above, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/303G01N3/02
CPCG01N3/02G01N3/303G01N2203/0039
Inventor 唐静静徐进贤葛秀花
Owner 连云港市建设工程质量检测中心有限公司
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