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Device used in rock and soil test for improving testing accuracy of micro earth pressure cell

A micro-earth pressure cell and a technology for testing accuracy, which can be applied to measuring devices, measuring forces, instruments, etc., and can solve problems such as errors in the results of micro-earth pressure cells.

Inactive Publication Date: 2012-07-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an economical and practical device for improving the test accuracy of the miniature earth pressure cell in rock and soil tests, and to solve the problem of wrong results caused by the force on the side of the miniature earth pressure cell

Method used

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  • Device used in rock and soil test for improving testing accuracy of micro earth pressure cell
  • Device used in rock and soil test for improving testing accuracy of micro earth pressure cell
  • Device used in rock and soil test for improving testing accuracy of micro earth pressure cell

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Experimental program
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Embodiment Construction

[0015] (1) Device production

[0016] Use a miniature pressure box with a diameter of 2.8cm and a height of 0.8cm; the inner diameter of the sponge ring is 2.8cm, the outer diameter is 3.2cm, and the height is 0.7cm; the inner diameter of the steel ring is 3.2cm, the outer diameter is 3.4cm, and the height is 0.7cm, incision on the side wall of the steel ring, the longitudinal depth of the incision is 4mm, and the width is 4mm. The data line of the miniature pressure cell is drawn out from the incision and fixed through the incision. The sponge gasket, pressure box and steel ring are connected with adhesive.

[0017] (2) Application steps

[0018] Taking the simulated tunnel excavation test as an example, the specific application steps of the device: (a) First connect the data line of the miniature earth pressure cell to the data collector, and reset the initial value of the collector to zero. (b) Install the inventive device in the model box, starting from the bottom of the...

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Abstract

The invention belongs to the technical field of civil engineering, and particularly relates to a device used in the rock and soil test for improving the testing accuracy of a micro earth pressure cell. The device includes a micro earth pressure cell, a sponge ring and a steel ring, wherein the micro earth pressure cell (1) is provided with a data line; a side notch of the steel ring is used for leading out and fixing the data line of the micro earth pressure cell (1); the sponge ring (2) is sleeved on the outer side surface of the micro earth pressure cell (1); the steel ring (3) is sleeved on the outer side surface of the sponge ring (2); and the micro earth pressure cell, the sponge ring and the steel ring are connected through a binder. The device solves the problem of inaccuracy in earth pressure measurement during the civil engineering construction process, and has the characteristics of high accuracy, simple operation and good economical efficiency.

Description

technical field [0001] The invention belongs to the technical field of civil engineering and relates to a device for improving the test accuracy of a miniature earth pressure cell. Background technique [0002] The rapid development of civil engineering construction in the 21st century has greatly promoted the development of geotechnical engineering, such as foundation pit engineering, road slope engineering, road and municipal buried pipe engineering, tunnel engineering, etc. The accurate calculation of earth pressure plays a vital role in how designers can make the construction of the project meet the mutual unification requirements of safety and economy. At present, there are still many controversies about the calculation of earth pressure, and the research work in this area is still in progress. Among them, indoor model test is an important research method, and ensuring the accuracy of micro earth pressure cell test is the key to the success of indoor model test. The co...

Claims

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Application Information

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IPC IPC(8): G01L1/00
Inventor 陶连金李文博杨丁铭黄俊张波王文沛李积栋
Owner BEIJING UNIV OF TECH
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