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Geogrid strain testing device and testing method thereof

A geogrid and strain testing technology, used in electromagnetic measurement devices, electrical/magnetic solid deformation measurement, field foundation soil survey, etc. The overall structure is complex and other problems, to achieve the effect of wide practicability, simple method and structure, and simple operation

Inactive Publication Date: 2010-08-04
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
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Problems solved by technology

Therefore, in the actual on-site test, this test method cannot measure the accurate strain value, so that the effect of the geogrid on site cannot be deeply understood.
At present, in the field test, there is also a test method using a geogrid displacement meter. This method overcomes the shortcoming of the small test range of the resistance strain gauge, but its overall structure is slightly more complicated, and the test cost for more points is also higher.

Method used

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  • Geogrid strain testing device and testing method thereof
  • Geogrid strain testing device and testing method thereof
  • Geogrid strain testing device and testing method thereof

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Embodiment Construction

[0018] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0019] Such as figure 1 with figure 2 As shown, the geogrid strain testing device of the present invention includes a rigid casing 1, a flexible sealing body 2 is attached in the rigid casing 1, and the flexible sealing body 2 contains a sensitive element 3, and the sensitive element 3 is made of a conductive rubber composite material 4 Processed and connected with the electrode 5 and the data line 6, the rigid housing base 7 is buckled on the bottom of the rigid housing 1, and the middle of the rigid housing base 7 is provided with a groove 8 that is clamped on the geogrid 9. The rigid shell 1 and the rigid shell bottom plate 8 are made of rigid metal or hard plastic. The flexible sealing body 2 is processed from rubber.

[0020] Geogrid strain test method of the present invention: at first in the region of construction geogrid 9, a plurality of measur...

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Abstract

The invention relates to a geogrid strain testing device and a testing method thereof. The device comprises a rigid shell, a flexible sealing body, a sensitive component and an electrode connected with a data line, wherein the side surface of the shell is provided with a line outlet hole for leading out the data line, the bottom of the shell is provided with a base interlocked with the bottom, and the middle part of the base is provided with a groove sleeved on the geogrid in a clamping mode. The strain of the geogrid is tested by the pulling sensitivity of the conductive rubber composite; and when in testing, the sensitive component is stuck with the geogrid; and when the geogrid is deformed, the resistance of the sensitive component is changed, and the strain of the geogrid can be obtained via testing the resistance change.

Description

technical field [0001] The invention relates to a geotechnical grid strain testing device and a testing method thereof, and is especially suitable for strain testing of grids in civil engineering. Background technique [0002] Geogrid is widely used as an indispensable building material in highways, railways, municipal engineering, water conservancy projects and industrial buildings in our country. It is often used as reinforcement for reinforced soil structures. But the actual effect of geogrid in engineering is not very clear at present, the main reason is that the strain of geogrid on construction site cannot be measured accurately. If the strain of the geogrid can be obtained, the actual ability of the grid can be analyzed. [0003] At present, the strain of geogrid is mainly tested by resistive strain gauge. The specific method is to paste strain gauges on the laid geogrid, and test the resistance value to reflect the strain of the grid under load. However, the test...

Claims

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Application Information

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IPC IPC(8): E02D1/08G01B7/16
Inventor 周国庆廖波梁恒昌陈国舟周扬刘卓典胡坤陆勇
Owner CHINA UNIV OF MINING & TECH
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