Test device for measuring soil suction by filter paper method

A technology of test device and filter paper method, which can be applied to measurement devices, instruments, scientific instruments, etc., can solve problems such as limitations, and achieve the effects of easy to master, simple structure, and improved accuracy.

Inactive Publication Date: 2010-12-15
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, human errors caused by high technical requirements in the measurement process also limit its application.

Method used

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  • Test device for measuring soil suction by filter paper method
  • Test device for measuring soil suction by filter paper method
  • Test device for measuring soil suction by filter paper method

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Experimental program
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Embodiment Construction

[0026] A preferred embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing: See Figure 1~6 , the filter paper method soil testing suction test device of the present invention comprises a device base 3, a device loam cake 1, a glass sleeve 2 and a spacer 9, and the upper and lower ends of the glass sleeve 2 are matched with the device base 3 and the device loam cake 1 respectively, and The junction between them is all padded with one deck rubber ring 15. Both the upper surface of the device base 3 and the lower surface of the device upper cover 1 have sleeve grooves 6 to match the glass sleeve 2, and the rubber rings 15 are embedded in the sleeve grooves 6 respectively. The periphery of the present invention is provided with a threaded pull rod 8, which passes through the through hole 16 of the upper cover 1 of the device, and the thread of the pull rod 8 matches the counterbore 7 with internal threads on the upper surface...

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Abstract

The invention discloses a test device for measuring soil suction by filter paper method. The device not only can be used in the test for measuring soil suction by filter paper method but also can be used in the test for calibrating suction-moisture content calibration relation curve by saturated salt solution. The device comprises a device base, a device upper cover, a glass sleeve and a spacer; wherein the upper end and the lower end of the glass sleeve are respectively matched with the device base and the device upper cover, and a rubber cushion is arranged at the joint. The upper surface of the device base and the lower surface of the device upper cover are all provided with a sleeve slot, the sleeve slot is matched with the glass sleeve, and the rubber cushion is respectively inlaid into the sleeve slot. The rubber cushion can prevent that gas in the device after the device is sealed is exchanged with the outside and prevent outleakage of saturate salt solution in the test for calibrating filter paper suction-moisture content calibration relation curve. The invention can conveniently determine total suction in soil or matrix suction, test accuracy is better, device construction is simple, operation is convenient and is easy to grasp, and the stability of filter paper is good when measuring suction.

Description

technical field [0001] The invention relates to a test device for measuring unsaturated soil suction by a filter paper method in the field of civil engineering geotechnical tests. Background technique [0002] Soil material is a combination of solid phase, liquid phase and gas phase. The solid particles of soil material form pores of soil skeleton, and liquid and gas are contained in these pores. When the pores of the soil skeleton are all filled with water, the soil is called saturated soil; when there is gas in the pores of the soil, the soil is called unsaturated soil; unsaturated soil includes two-phase system and three-phase system, For example, when the pores of the soil skeleton only contain air, it becomes dry soil; when the pores of the soil contain both air and water, the soil at this time belongs to the three-phase system and is called wet soil. Soil saturation is defined as the ratio of the volume of water in the soil to the pore volume, that is, the degree to w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
Inventor 孙德安孟德林陈瑶瑶陈立文吴波
Owner SHANGHAI UNIV
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