Probe for in-situ real time measuring saturated fine soil borizontal stress and measuring, calculating method

A horizontal stress, real-time measurement technology, applied in hydraulic/pneumatic force measurement, calculation, soil material testing, etc., can solve problems such as large influence of human factors and complicated calculation steps

Active Publication Date: 2006-06-28
铁道第三勘察设计院有限公司
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Problems solved by technology

The method of determining the horizontal consolidation coefficient by the pore pressure probe and the stress shovel is similar, one is determined by the curve fitting method, and the other is determined by looking up the table according to the stiffness index of the soil and the pore water pressure parameters when the soil is damaged. The steps are complicated, and human factors are greatly affected

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  • Probe for in-situ real time measuring saturated fine soil borizontal stress and measuring, calculating method
  • Probe for in-situ real time measuring saturated fine soil borizontal stress and measuring, calculating method
  • Probe for in-situ real time measuring saturated fine soil borizontal stress and measuring, calculating method

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Embodiment Construction

[0040] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0041] figure 1 It is a schematic diagram of a partial cross-sectional structure of the present invention; figure 2 is the relationship curve between horizontal stress and time measured by the probe.

[0042] As shown in the figure, the present invention provides a probe 8 for in-situ real-time measurement of the horizontal stress of saturated fine-grained soil. One end of the probe 8 is a threaded head connected to an external screw pressure rod, and the other end of the probe 8 is conical. The purpose of the conical structure is to facilitate the pressing of the probe 8 into the soil layer.

[0043] The middle part of the probe 8 is cylindrical, and there is a groove with a certain width outside the cylinder, which is called the pressure protection groove 6. When the probe 8 is pressed into the soil layer, it will receive a certain resistance,...

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Abstract

A method for measuring horizontal stress of fine granulated saturation soil at original place in real time calculates out degree U of consolidation and horizontal consolidation coefficient C as well as static side pressure coefficient K by obtaining relation curve of horizontal pressure R at saturation soil layer deep position to time T and by applying three ¿C points calculation means to calculate horizontal stress R1 at initial time and horizontal stress at time of finalizing excess pore water pressure evanish . The probe for realizing said method is also disclosed.

Description

technical field [0001] The invention relates to an instrument for geotechnical engineering investigation and measurement of the horizontal stress of saturated fine-grained soil and a measurement and calculation method thereof, in particular to a probe for in-situ real-time measurement of the horizontal stress of saturated fine-grained soil and a measurement and calculation method. Background technique [0002] At present, the determination of parameters such as the static lateral pressure coefficient and consolidation coefficient of the formation is generally completed by drilling samples and laboratory tests. The completion of the measurement requires a series of processes such as drilling and sampling, transportation, sample preparation, and testing. The measurement process will inevitably cause disturbance of the soil sample, which will inevitably affect the accuracy of the test results. At the same time, this method is time-consuming and expensive. [0003] In Japan, th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01L1/02G06F19/00
Inventor 孟庆文刘克玲
Owner 铁道第三勘察设计院有限公司
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