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Flexible boundary load test device

A technology of loading test device and flexible boundary, which is applied in the measurement device, using stable tension/pressure to test the strength and strength characteristics of materials, etc. Guaranteed effect of accuracy and authenticity

Active Publication Date: 2014-07-16
PLA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0013] None of the currently popular loading systems for simulating ground stress can meet this requirement (hydraulic servo control system loading can meet large pressure and large stroke, but it is rigid loading, and it cannot respond instantaneously to changes caused by surrounding rock rebound, and has hysteresis. Defects; while the pressurization range of the oil bag and air bag is limited, and the stroke is small, there are simulation defects)

Method used

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Embodiment Construction

[0035] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the embodiments and accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0036] see Figure 4-6 In the shown flexible boundary loading test device, the base is composed of a base plate 11 folded around and a sleeve 12, and a disc spring 13 and a pressure bearing plate 14 are placed in the sleeve, and the pressure bearing plate 14 acts as a bearing for the testing machine The parts that are in direct contact with the jack, and the sleeve 12 need to be subjected to surface heat treatment during the production process, so that the surface hardness is not less than HRC50; there is a support piece 15 between the sleeve 12 and the base steel plate 11, and the support piece 15 is evenly distributed on the sleeve. The periphe...

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Abstract

The invention discloses a flexible boundary load test device. The flexible boundary load test device comprises a base, a spring system and a bearing plate, wherein the front surface of the base is provided with a guide device; the spring system is arranged in the guide device; the spring system in the guide device is provided with the bearing plate, and is formed by the combination of belleville springs, and can be laminated, folded and combined to acquire the required rigidity according to the required rigidity of particular tests. The flexible boundary load test device has the advantages of high bearing capability, small required space, convenience in combining and using, rigidity variation, buffer shock absorption and the like. The belleville springs are used as force transmitting, buffering and shock absorbing and energy storage media of the test device, can timely supply energy required for surrounding rock resilience caused by excavation unloading for test models, and supply resilience rigidity for the models; the flexible boundary load test device can truly simulate the crustal stress of deep rock bodies so as to guarantee the accuracy and the authenticity of tests.

Description

technical field [0001] The invention relates to a flexible loading device, in particular to a flexible boundary loading test device suitable for geomechanical model tests. Background technique [0002] With the rapid development of my country's mine tunnels, national defense, water conservancy and other underground engineering construction, the development and utilization of underground space has gradually entered the deep part, the engineering geological conditions encountered are becoming more and more complex, and the problems are becoming more challenging. Disasters occur frequently, such as rockbursts, large deformations of surrounding rocks in tunnels, and rupture of partitions. Once they occur, the consequences will be very serious. [0003] The current research methods mainly include theoretical research, model test and numerical simulation. Due to the characteristics of the rock-soil medium itself and the complexity of the existing geological environment, various en...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N3/02
Inventor 王明洋李浪李治中范鹏贤刘斌张宁蒋海明
Owner PLA UNIV OF SCI & TECH
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