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Numerically-controlled tension test system for soil body and test method for same

A tensile test and control system technology, applied in the field of testing, can solve problems such as stress concentration or relative slippage of fixtures and test pieces, tension eccentricity, etc., and achieve the effect of avoiding eccentric tension, avoiding stress concentration, and significant economic benefits

Inactive Publication Date: 2013-01-02
SHANDONG UNIV
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Problems solved by technology

The instrument has the problem of tension eccentricity, and it is easy to generate stress concentration or relative slippage between the fixture and the specimen

Method used

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  • Numerically-controlled tension test system for soil body and test method for same
  • Numerically-controlled tension test system for soil body and test method for same
  • Numerically-controlled tension test system for soil body and test method for same

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] figure 1 Among them, the soil numerical control tensile test system is mainly composed of a tensile loading device 1, a hydraulic loading digital servo control system 2 and an automatic displacement tensile test analysis system 3.

[0042] The tension loading device 1 is mainly composed of a tension sensor 4 , a tension jack 5 , a centering force transmission bearing device 6 , a dumbbell-shaped half-open steel mold 7 , a fixed bracket 9 and a tension work platform 10 . The dumbbell-shaped semi-open steel mold 7 is used to place the soil tensile test piece 19, the middle section size of the test piece is 50mm×50mm, and the straight line length of the middle part is 100mm. The steel mold 7 is composed of two symmetrical parts disconnected in the middle, its right half is connected with the centering force transmission bearing device 6 and fixed o...

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Abstract

The invention discloses a numerically-controlled tension test system for a soil body, wherein a tension loading system is connected with a hydraulic loading digital servo control system and an automatic displacement tension force test and analysis system respectively; and the tension loading system comprises a tension working platform, the tension working platform is provided with two opposite fixed supports, a first alignment force-transferring bearing is arranged on one of the fixed supports at the opposite sides, a horizontally-placed tension jack is arranged on the other fixed support, the outer end part of the push-pull rod of the jack is fixedly connected with a second alignment force-transferring bearing, a dumbbell-shaped half-open steel mould for placing a tension test piece is arranged between the first alignment force-transferring bearing and the second alignment force-transferring bearing, and the both ends of the dumbbell-shaped half-open steel mould are connected with the first alignment force-transferring bearing and the second alignment force-transferring bearing respectively. Via the numerically-controlled tension test system for a soil body disclosed by the invention, the tension deformation modulus and the tensile strength of the soil body can be more accurately tested, the tension deformation characteristics and the strength characteristics of the soil body can be more effectively revealed, and important mechanical test parameters are provided for reasonable design and safety control of earth structures.

Description

technical field [0001] The invention relates to a test technology, in particular to a soil numerical control tensile test system and a test method thereof used in soil tensile tests in engineering fields such as civil engineering, hydropower and transportation. Background technique [0002] At present, in recent years, with the gradual increase of highways, airports, high earth-rock dams, deep foundation pits and other projects, the engineering losses of geotechnical structures caused by soil tension and cracking have become more and more serious. When studying whether tensile cracks appear in earth dams, embankments, and subgrades, and analyzing and processing the causes of cracks, it is more and more important to have a correct understanding of the tensile deformation characteristics of soil and the accurate measurement of its tensile strength index. . However, when studying the mechanical properties of soil in the past, the shear and compressive properties of the soil we...

Claims

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Application Information

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IPC IPC(8): G01N3/10
Inventor 张强勇张绪涛向文
Owner SHANDONG UNIV
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