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Device based on resistivity piezocone penetration test and saturated sandy soil dilatancy evaluation method

A technology of pore pressure static penetration and resistivity, which is applied in the field of foundation soil survey, foundation structure engineering, construction, etc.

Inactive Publication Date: 2013-02-27
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Conical probe specifications comply with international standards

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  • Device based on resistivity piezocone penetration test and saturated sandy soil dilatancy evaluation method
  • Device based on resistivity piezocone penetration test and saturated sandy soil dilatancy evaluation method
  • Device based on resistivity piezocone penetration test and saturated sandy soil dilatancy evaluation method

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Embodiment Construction

[0024] Such as figure 1 Shown is the structural diagram of the device based on resistivity pore piezostatic penetration testing according to the present invention. The top is provided with a power supply coaxial cable 1; in the middle of the resistivity pore piezostatic sounding device, an insulating material 2 and a ring electrode 3 are arranged in sequence from top to bottom to form a resistance sensor; the lower part of the resistivity pore piezostatic sounding device A side wall friction cylinder 4 is provided. A pore water pressure sensor 5 is arranged on the side wall friction cylinder 4. A pore pressure filter ring 7 is connected below the pore water pressure sensor 5. A conical probe 6 is provided at the lower part of the pore pressure filter ring 7.

[0025] The number of the ring electrodes 3 is 5, the thickness is 1.5mm, the width is 5mm, and the arrangement spacing from top to bottom is 30mm, 19mm, 40mm, 30mm respectively.

[0026] The total length of the annular ...

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Abstract

The invention discloses a device based on a resistivity piezocone penetration test and a saturated sandy soil dilatancy evaluation method. The method is based on a resistivity piezocone penetration test device, a power coaxial cable (1) is arranged at the top of the device, a resistivity sensor composed of an insulation material (2) and an annular electrode (3) is arranged below the power coaxial cable (1), the lower half portion of the resistivity piezocone penetration test device is sequentially connected with a friction drum (4) and a pore-water pressure sensor (5) from top to bottom, and the lower portion of the friction drum (4) is connected with a pore pressure filtering ring (7) and a conical probe (6). The novel method based on the resistivity piezocone penetration test has the advantages of being in-situ, accurate, convenient, economical and the like, and provides a strong detection and evaluation tool for geotechnical engineering investigation and foundation treatment effect evaluation practice.

Description

technical field [0001] The invention relates to a new method for evaluating the dilatancy of saturated sandy soil based on resistivity pore pressure static penetration testing, belonging to a static penetration testing method capable of directly and in-situ testing the dilation coefficient of saturated sandy soil in the field of geotechnical engineering device. Background technique [0002] Static CPT technology refers to using a pressure device to press a penetrating rod with a probe into the test soil layer, and through the measurement system to test the cone tip resistance and side wall friction resistance of the soil, some basic physical properties of the soil can be determined. Mechanical properties, such as the deformation modulus of the soil, the allowable bearing capacity of the soil, etc. The static penetration technology has a history of more than 80 years. Static CPT is widely used in the world, partially or completely replacing drilling and sampling in engineer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/00
Inventor 蔡国军刘松玉张涛邹海峰童立元杜广印
Owner SOUTHEAST UNIV
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