Elastica loading unit capable of simulating formation resistance capability

A technology for simulating strata and loading devices, which is applied in basic structure testing, construction, and basic structure engineering, etc., can solve problems such as inability to load, do not meet the interaction between stratum and soil, increase test cost and workload, and achieve convenience loaded effect

Inactive Publication Date: 2008-01-30
TONGJI UNIV
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Problems solved by technology

[0009] (1) Due to the high stiffness of the jack, the structure cannot be deformed; at the same time, even if the jack is retracted so that the structure can be deformed, there is no corresponding soil resistance applied to the structure while the structure is deforming, which does not conform to the interaction between the stratum and the soil the actual situation
[0010] (2) It is not possible to directly load the structure during the high temperature test
If it is used to load the structure during the high-temperature test, it is necessary to take cooling protection measures for the jack to ensure the correc

Method used

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  • Elastica loading unit capable of simulating formation resistance capability
  • Elastica loading unit capable of simulating formation resistance capability

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Embodiment Construction

[0026] As shown in Figure 3, the elastic loading device of the present invention comprises a jack, is provided with fixed base 1 and loading head 2 on it, and elastic device is made of dowel bar 3, spring 4 and loading bar 5, and the rear of dowel bar 3 end is connected with the loading head 2, and the front end of the dowel bar 3 is connected with the loading bar 5 through the spring 4. In order to guide and facilitate the installation of the spring, the front end of the dowel bar 3 is fixedly connected to a section of the guide bar 31, and the center of the loading bar 5 A guide hole 51 is provided for sliding fit with the guide rod 31 , and the spring 4 is sleeved on the outside of the guide rod 31 and compressed between the dowel rod 3 and the loading rod 5 . A fixed frame 9 is respectively fixed on the fixed seat 1, the dowel bar 3 and the loading bar 5, wherein a scale indicator ruler 6 is connected between the two fixing frames 9 on the loading bar 5 and the dowel bar 3 ...

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Abstract

The invention discloses an elastic loading device that is applied to testing underground structural mechanical property and can simulate strata resistance, comprising a fixed base, a loading joint and an elastic device. The elastic device consists of a dowel, a spring and a loading rod; the rear end of the dowel is connected with the loading joint and the front end is connected with the loading rod by the spring. A displacement meter is connected between the fixed seat and the loading rod. Compared with the prior art, the loading device and method of the invention can not only simulate the function of strata resistance, thereby reflecting the stress state of the structure under the ground more really, but also can obtain the right deformation of the structure at any moment and the loading that is actually imposed on the structure only by continuous recording the reading of the displacement meter when in use due to the skillful using of the property of the spring.. Meanwhile, due to the buffer action of the spring device, the loading device can conveniently load on the structure in the high temperature experiment.

Description

technical field [0001] The invention relates to a test device, in particular to a loading device for testing the mechanical properties of underground structures. Background technique [0002] For the underground structure, the ground is not only the source of load, but also has a restraining effect on the deformation of the structure (ground resistance). Specifically, since the formation is composed of deformable soil with a certain rigidity, when the underground structure moves toward the soil side due to deformation, the structure exerts force on the soil, and the soil will undergo compression deformation . At the same time, due to the compression deformation of the soil, in turn, it will have a restraining effect on the structure, restraining the continuous deformation of the structure, that is, the formation resistance. Therefore, in the field of underground engineering, when performing mechanical performance tests on underground structures buried in the ground, it is ...

Claims

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Application Information

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IPC IPC(8): E02D33/00
Inventor 闫治国朱合华丁文其姚坚强健曾令军
Owner TONGJI UNIV
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