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Simple device for simultaneous calibration of three earth pressure boxes

An earth pressure cell, a simple technology, applied in the field of geotechnical testing, can solve the problems of repeated tests, heavy workload, long time consumption, etc., and achieve the effect of flexible and convenient selection, small footprint and high efficiency

Inactive Publication Date: 2016-10-12
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current earth pressure cell calibration equipment can only calibrate one earth pressure cell in one test, and the efficiency is low.
If a large number of earth pressure cells need to be calibrated, the number of repeated tests is large, the workload is heavy and time-consuming

Method used

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  • Simple device for simultaneous calibration of three earth pressure boxes
  • Simple device for simultaneous calibration of three earth pressure boxes
  • Simple device for simultaneous calibration of three earth pressure boxes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0032] (1) Insert the earth pressure cell into the circular groove of the first-stage drum 1, with the pressure-bearing surface upward; the peripheral gap between the earth pressure cell and the circular groove is carefully sealed with hot wax; the signal transmission line 6 of the earth pressure cell is embedded The trunking leads to the outside of the drum. Special attention should be paid to the signal transmission line 6 of the earth pressure cell, which should be flat and continuously embedded in the trunking, and should not protrude or protrude outside the range of the trunking, otherwise it will affect the test work. If necessary, glass glue can be used to temporarily fix it on the inner wall of the trunking;

[0033] (2), insert other earth pressure cells into the circular grooves of the second-stage drum 2 and the third-stage drum 3 in the same way;

[0034] (3), weigh and record the total weight of all levels of drums embedded in the earth pressure cell;

[0035] (4...

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Abstract

The invention discloses a simple device which can calibrate three earth pressure boxes at the same time, which comprises a first stage drum, a second stage drum, a third stage drum, a loading platform and counterweights. The earth pressure boxes are placed in the round placing grooves for the different stage drums; the signal transmission lines of the earth pressure boxes are built inside the drums, more particularly, to the side bottoms and the external part of the wire outlet grooves at the inner walls. The second-stage drum is embedded in the upper part of the first-stage drum and the third-stage drum is embedded in the upper part of the second-stage drum. The loading platform is embedded in the upper part of the third-stage drum. Simultaneous loading and testing of three earth pressure boxes can be realized by the step-by-step loading of the multiple counterweights. The earth pressure box calibrating device can calibrate three earth pressure boxes at the same time through simple operation to achieve high efficiency; it can be used in an indoor or outdoor site. During a non-working state, the components can be embedded in turn, making the device small in size and convenient to transport.

Description

Technical field: [0001] The invention relates to an earth pressure cell calibration device, which belongs to the technical field of geotechnical tests, in particular to a simple device for simultaneously calibrating three earth pressure cells. Background technique: [0002] Usually, in engineering design, it is necessary to grasp the contact pressure between the soil and the engineering structure or the stress in the soil medium, that is, the magnitude of the earth pressure. Generally, an earth pressure cell is used to directly measure the value of earth pressure. Earth pressure cells have been widely used in engineering practice, such as dynamic and static tests of retaining walls, roadbeds, tunnels and dams, and are also used in various indoor model tests to study the mechanical mechanism of various geotechnical engineering problems . [0003] At present, the working parameters of the earth pressure cell given by the earth pressure cell manufacturer are mostly obtained u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L25/00
CPCG01L25/00
Inventor 刘金龙刘洁群华建兵李红李国斌孙欣欣
Owner HEFEI UNIV