Elastica loading unit capable of simulating formation resistance capability

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 ...

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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 correctness of the loading, which increases the test cost and workload

[0011] (3) The function is single, and the deformation of the structure at the loading point cannot be obtained at the same time

At the same time, in some cases, due to the interference between the jack and the deformation measuring point in the spatial position, the test deformation cannot be realized

[0012] (4) It is not convenient to obtain the load actually applied to the structure

If it is necessary to obtain the load actually applied to the structure, additional dynamometers need to be arranged, which increases the workload and cost of the test

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