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Full flow pore pressure sounding penetrometer based on ball shape and consolidation coefficient evaluation method of full flow pore pressure sounding penetrometer based on ball shape

A technology of consolidation coefficient and evaluation method, applied in the direction of foundation structure engineering, field foundation soil survey, construction, etc., can solve the problems of uneconomical and time-consuming, and achieve the effect of reliability and repeatability

Active Publication Date: 2016-12-07
SOUTHEAST UNIV
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Problems solved by technology

But this method takes a very long time. Generally speaking, it takes several hours or even longer to dissipate to 50%
In marine geotechnical engineering investigation, the cost per day is as high as 500,000 yuan, and this test method is obviously uneconomical

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  • Full flow pore pressure sounding penetrometer based on ball shape and consolidation coefficient evaluation method of full flow pore pressure sounding penetrometer based on ball shape
  • Full flow pore pressure sounding penetrometer based on ball shape and consolidation coefficient evaluation method of full flow pore pressure sounding penetrometer based on ball shape
  • Full flow pore pressure sounding penetrometer based on ball shape and consolidation coefficient evaluation method of full flow pore pressure sounding penetrometer based on ball shape

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and specific example, further illustrate the present invention, should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalents of the present invention Modifications in form all fall within the scope defined by the appended claims of this application.

[0035] see figure 1 As shown, the present invention discloses a method for in-situ evaluation of soft soil consolidation coefficient based on a spherical full-flow penetrometer. The full-flow penetrative ball probe 1 has nine 2-hole pressure sensors, which are symmetrically distributed . The surface of the pore pressure sensor is wrapped with a pore pressure filter ring, which can prevent soil particles from entering the pore pressure sensor and affecting the test results during th...

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Abstract

The invention discloses a full flow pore pressure sounding penetrometer based on a ball shape and a consolidation coefficient evaluation method of the full flow pore pressure sounding penetrometer based on the ball shape. A pore pressure static sounding feeler lever (5) is arranged at the upper portion of the penetrometer, and the lower portion of the pore pressure static sounding feeler lever (5) is sequentially connected with a conversion head (6), a full flow sounding feeler lever (4) and a full flow sounding ball-shaped probe (1). Multiple pore pressure sensors (2) are arranged in the full flow sounding ball-shaped probe (1) along the transverse circumference. Pore pressure filtering rings (3) are arranged outside the pore pressure sensors (2). A pore pressure sensor (2) is arranged at the connecting position of the bottom end of the pore pressure static sounding feeler lever (5) and the conversion head (6), wherein a pore pressure filtering ring (3) is arranged outside the pore pressure sensor (2). The full flow pore pressure sounding penetrometer penetrates into soil continuously at a constant speed, penetration resistance and pore water pressure dissipation data can be obtained, the beneficial effects of the in-situ property, directness, rapidness, accuracy, economic efficiency and the like can be achieved for evaluating soft soil consolidation coefficients, and a forceful measuring tool is provided for the geotechnical engineering foundation treatment practice.

Description

technical field [0001] The invention relates to a consolidation coefficient evaluation method based on a spherical full-flow hole pressure penetration penetrator, which belongs to an in-situ testing method capable of directly and continuously analyzing and testing plant root system reinforced soil in the field of geotechnical engineering. Background technique [0002] Consolidation coefficient is a very important index of soil in geotechnical design. Consolidation coefficient is usually obtained by testing undisturbed soil indoors. However, in the subsea environment, the integrity and undisturbed nature of the sample cannot be guaranteed during sampling and transportation, so it is best obtained during in situ testing. At present, the most common method for measuring the in-situ consolidation coefficient is pore pressure static penetration testing, and the soil consolidation coefficient is calculated by dissipating 50% of the pore water pressure at the penetration position. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/02
CPCE02D1/022E02D1/027
Inventor 蔡国军夏涵
Owner SOUTHEAST UNIV
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