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Assembled type on-site dual-ring penetration test device and method thereof

A seepage test device and assembled technology, which is applied in the field of on-site measurement of soil permeability coefficient, can solve problems such as non-compliance of seepage in clayey soil, and achieve the effect of eliminating errors and accurate test results

Pending Publication Date: 2017-05-31
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

But for cohesive soil, because of the viscous resistance of bound water, only when the hydraulic gradient increases to the initial hydraulic gradient and overcomes the viscous resistance of bound water, can water seep and flow in the soil, so seepage in cohesive soil is not According to Darcy's law

Method used

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  • Assembled type on-site dual-ring penetration test device and method thereof
  • Assembled type on-site dual-ring penetration test device and method thereof
  • Assembled type on-site dual-ring penetration test device and method thereof

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Embodiment Construction

[0052] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0053] 1. Device

[0054] 1. Overall

[0055] Such as Figure 1-4 , the device includes the test object - sand;

[0056] A supporting module 10, a water storage module 20, a flow monitoring module 30 and a double-ring module 40 are provided;

[0057] The support module 10 includes a vertical pole 11, a horizontal plane 12, a flatbed cart 13 and a small wheel 14. Four vertical poles 11 are respectively connected to form a support at the 4 corners of the horizontal plane 12. Two vertical poles on one side of the support The bottom of the straight strut 11 is connected with a flatbed cart 13, and the bottoms of the two vertical struts 11 on the other side of the support and the four corners of the bottom of the flatbed cart 13 are respectively connected with small wheels 14;

[0058] The water storage module 20 includes a water storage bucket 21, a water guide pipe 22 and an air suction...

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Abstract

The invention discloses an assembled type on-site dual-ring penetration test device and a method thereof, relating to the technical field of on-site measurement on penetration coefficients of soil layers. The device comprises a test object, namely sandy soil; a supporting module (10), a water accumulation module (20), a flow rate monitoring module (30) and a dual-ring module (40) are arranged; the method mainly comprises the following steps: simultaneously switching on an outer-ring water flow switch and an inner-ring water flow switch, so as to keep the level of the inner ring and the outer ring of the dual rings at the same height, then keeping water level unchanged during the whole test, and recording the water flow within certain time with a flow meter. The flow within unit time can be recorded through the flow meter, errors caused by manual recording can be eliminated, so that the experimental results are more accurate; through the device, manpower can be greatly reduced, and the test can be completed by only two persons.

Description

technical field [0001] The invention relates to the technical field of on-site measurement of soil permeability coefficient, in particular to an assembled on-site double-ring penetration test device and a method thereof. Background technique [0002] Soil permeability is a property that characterizes the seepage and flow of water in soil pores. The soil permeability index is the permeability coefficient. The water in the soil flows under the influence of water level difference and stress, and the seepage of sandy soil basically obeys Darcy's law. But for cohesive soil, because of the viscous resistance of bound water, only when the hydraulic gradient increases to the initial hydraulic gradient and overcomes the viscous resistance of bound water, can water seep and flow in the soil, so seepage in cohesive soil is not According to Darcy's law. The permeability of soil involves many fields, such as civil engineering, hydrogeology, agriculture, water conservancy and environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 胡明鉴蒋航海朱长歧阮洋翁贻令刘海峰何坤鹏周李杰陈拥军
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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