Resistivity detector for quantitatively evaluating change of soil porosity

A quantitative evaluation and porosity technology, applied in the field of foundation soil survey, construction, infrastructure engineering, etc., can solve problems such as inability to soil porosity, change in-situ quantitative evaluation, etc.

Inactive Publication Date: 2013-03-06
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

[0004] Technical problem: The technical problem to be solved in this invention is to propose a resistivity detector that can quantitatively evaluate the change of soi

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  • Resistivity detector for quantitatively evaluating change of soil porosity
  • Resistivity detector for quantitatively evaluating change of soil porosity
  • Resistivity detector for quantitatively evaluating change of soil porosity

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Embodiment Construction

[0021] The upper part of the resistivity detector for quantitatively evaluating the change of soil porosity of the present invention uses insulating PVC material 1 and stainless steel ring electrode 2 to form a resistance sensor; structurally, the upper part of the probe is arranged alternately from top to bottom Insulated PVC material 1 and stainless steel ring electrode 2 are provided; the lower part of the probe is provided with a side wall friction cylinder 3, a pore water pressure sensor 4 is arranged in the middle of the side wall friction cylinder 3, and a cone is connected below the side wall friction cylinder 3 The probe 5 is provided with a pore pressure filter ring 6 between the side wall friction cylinder 3 and the conical probe 5 .

[0022] Such as figure 1 A schematic of the measurement is shown. The total length of the stainless steel ring electrode 2 in the vertical direction of the detector is 50mm.

[0023] The four stainless steel ring electrodes 2 have a ...

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Abstract

The invention discloses a resistivity detector for quantitatively evaluating the change of soil porosity; at the upper half part of a probe of the detector, an insulated polyvinyl chloride (PVC) material (1) and a stainless steel circular electrode (2) form a resistance sensor; in the structure, the insulated PVC material (1) and the stainless steel circular electrode (2) are lined at the upper half part of the probe at intervals from top to down in sequence; the lower half part of the probe is provided with a side wall friction tube (3); a pore water pressure sensor (4) is arranged in the middle of the side wall friction tube (3); a conical probe (5) is connected below the side wall friction tube (3); and a pore pressure filter ring (6) is arranged between the side wall friction tube (3) and the conical probe (5). The detector has the characteristics of original position, quickness, accuracy, economy and the like, and a powerful detection tool is provided for the practice of the soil disturbance evaluation in a model test and the foundation treatment in civil engineering.

Description

technical field [0001] The invention relates to a resistivity detector, belonging to a static penetrating sounding device capable of continuously and quantitatively testing in-situ porosity changes of soil layers in the field of geotechnical engineering. Background technique [0002] Static penetration technology refers to the use of a pressure device to press a penetration rod with a contact 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 engineering investigation. In 1965, our country first successfully developed the electric measur...

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Application Information

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IPC IPC(8): E02D1/00
Inventor 蔡国军刘松玉张涛邹海峰
Owner SOUTHEAST UNIV
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