CN102589756A - Device used in rock and soil test for improving testing accuracy of micro earth pressure cell - Google Patents

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

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Publication number
CN102589756A
CN102589756A CN201210083583XA CN201210083583A CN102589756A CN 102589756 A CN102589756 A CN 102589756A CN 201210083583X A CN201210083583X A CN 201210083583XA CN 201210083583 A CN201210083583 A CN 201210083583A CN 102589756 A CN102589756 A CN 102589756A
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CN
China
Prior art keywords
pressure cell
soil pressure
earth pressure
sponge ring
miniature soil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201210083583XA
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Chinese (zh)
Inventor
陶连金
李文博
杨丁铭
黄�俊
张波
王文沛
李积栋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing University of Technology
Original Assignee
Beijing University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing University of Technology filed Critical Beijing University of Technology
Priority to CN201210083583XA priority Critical patent/CN102589756A/en
Publication of CN102589756A publication Critical patent/CN102589756A/en
Pending legal-status Critical Current

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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

A kind of device that is used for the miniature soil pressure cell measuring accuracy of ground test raising
Technical field
The invention belongs to technical field of civil engineering, relate to a kind of device that is used to improve miniature soil pressure cell measuring accuracy.
Background technology
21 century the civil engineering construction high speed development, promoted the development of Geotechnical Engineering greatly, for example the slope project of base pit engineering, highway, highway and municipal pipe laying engineering, Tunnel Engineering etc.How the deviser makes building of engineering satisfy the mutual unified demand of safety and economy, and the accurate calculating of soil pressure plays crucial effects.Also there is more dispute in the calculating of soil pressure at present, and this respect research work is also being carried out, and wherein indoor model test is a kind of important research means, guarantees that miniature soil pressure cell accuracy of test is the key of indoor model test success or not.Conventional miniature soil pressure cell directly is embedded in the soil; But principle of work based on soil pressure cell; The soil pressure cell stress surface is very responsive to distortion; And soil pressure cell receives the surrounding soil lateral pressure in the test process, will produce certain additional deformation at stress surface, causes the soil pressure test result inaccurate thus.In addition, in order to reduce the size effect of soil pressure cell, soil pressure cell develops towards small direction, and soil pressure cell is more little, and the stressed error that causes in soil pressure cell side is big more.
In sum, the measuring accuracy that how to improve miniature soil pressure cell is a problem demanding prompt solution.Especially a kind of economical and practical method.
Summary of the invention
The object of the present invention is to provide the device that improves miniature soil pressure cell measuring accuracy in a kind of economical and practical ground test, solve the stressed problem that causes erroneous results in miniature soil pressure cell side.To achieve these goals, the method for the present invention's employing is:
A kind of device that is used for the miniature soil pressure cell measuring accuracy of ground test raising comprises: miniature soil pressure cell (1), sponge ring (2), steel loop (3); Miniature soil pressure cell (1) has data line; The side cutout of steel loop is used to draw and the data line of fixing miniature soil pressure cell (1), and sponge ring (2) is placed in the lateral surface of miniature soil pressure cell (1); Steel loop (3) is placed in the lateral surface of sponge ring (2), and the three adopts cementing agent to connect.
The interior diameter of sponge ring (2) equals the diameter of micro pressure box (1), and the overall diameter of sponge ring (2) equals the interior diameter of steel loop (3).Shown in accompanying drawing 1~2.
The height of sponge ring (2) equals the height of steel loop (3), and less than the height of miniature soil pressure cell (1).
After the steel loop lateral deformation takes place, because the elastic modulus of sponge ring is very little, can absorb energy, thereby eliminate the suffered influence of soil pressure cell lateral force, improve the soil pressure cell precision of test result.
Beneficial effect
Steel loop reduces the lateral deformation of soil pressure cell, and sponge absorbs energy, thereby has improved the measuring accuracy of soil pressure cell.This device is simple to operate, good economy performance.
Description of drawings
Accompanying drawing 1 synoptic diagram of the present invention
The synoptic diagram of accompanying drawing 2 steel loops
Accompanying drawing 3 soil pressure test values and standard value contrast
Among the figure: 1, be miniature soil pressure cell, 2, be the sponge ring, 3, be steel loop.
Embodiment
(1) device is made
Select the micro pressure box for use, diameter is 2.8cm, highly is 0.8cm; Sponge ring interior diameter is 2.8cm, and external diameter is 3.2cm, highly is 0.7cm; The steel loop interior diameter is 3.2cm, is outward 3.4cm straight, highly is 0.7cm, the steel loop side wall relief, and the vertical degree of depth of otch is 4mm, and width is 4mm, and the data line of micro pressure box is drawn and is fixed through this otch from this otch.Sponge pad, pressure cell, steel loop three connect with cementing agent.
(2) applying step
With the simulation tunnel following steps of excavating test is example, the concrete applying step of this device: (a) at first the data line of miniature soil pressure cell is connected with data acquisition unit, the collector initial value makes zero.(b) this contrive equipment is installed in model casing, is begun to install from the model casing bottom, layering dress soil after installing, and wipe densification off, dress soil continues to install this contrive equipment to test height.(c) according to design height tunnel model is installed, is gathered primary data, test ready.(d) carry out the tunnels mimic excavation, accomplish data acquisition.
(3) data contrast
For the superiority of apparatus of the present invention is described, carry out following test: (a) directly pressure cell is placed the bottom of model casing, the top depth of fill is respectively 5cm, 10cm, 15cm, 20cm, 25cm, 30cm, according to depth of fill difference image data.(b) this contrive equipment is placed the bottom of model casing, the depth of fill and front the same, image data respectively.(c) density of soil is 1500kg/m 3, the corresponding standard soil pressure value of the different depths of fill is respectively 750Pa, 1500Pa, 2250Pa, 3000Pa, 3750Pa, 4500Pa.Can know that by accompanying drawing 3 it is more approaching to use this contrive equipment test value and standard value, not use this contrive equipment and the standard value deviation is more, discrete relatively.

Claims (3)

1. one kind is used for the device that the ground test improves miniature soil pressure cell measuring accuracy; It is characterized in that comprising: miniature soil pressure cell (1), sponge ring (2) and steel loop (3), miniature soil pressure cell (1) has data line, the side cutout of steel loop (3); Be used to draw and fix the data line of miniature soil pressure cell (1); Sponge ring (2) is placed in the lateral surface of miniature soil pressure cell (1), and steel loop (3) is placed in the lateral surface of sponge ring (2), and the three adopts cementing agent to connect.
2. a kind of device that rock earth model test improves miniature soil pressure cell measuring accuracy that is used for according to claim 1; It is characterized in that comprising: the interior diameter of sponge ring (2) equals the diameter of micro pressure box (1), and the overall diameter of sponge ring (2) equals the interior diameter of steel loop (3).
3. a kind of device that rock earth model test improves miniature soil pressure cell measuring accuracy that is used for according to claim 1, it is characterized in that comprising: the height of described sponge ring (2) equals the height of steel loop (3), and less than the height of miniature soil pressure cell (1).
CN201210083583XA 2012-03-27 2012-03-27 Device used in rock and soil test for improving testing accuracy of micro earth pressure cell Pending CN102589756A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210083583XA CN102589756A (en) 2012-03-27 2012-03-27 Device used in rock and soil test for improving testing accuracy of micro earth pressure cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210083583XA CN102589756A (en) 2012-03-27 2012-03-27 Device used in rock and soil test for improving testing accuracy of micro earth pressure cell

Publications (1)

Publication Number Publication Date
CN102589756A true CN102589756A (en) 2012-07-18

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Family Applications (1)

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Country Status (1)

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CN (1) CN102589756A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104748894A (en) * 2015-04-17 2015-07-01 中国工程物理研究院总体工程研究所 Sputter film type soil pressure sensor
CN104848988A (en) * 2015-05-14 2015-08-19 浙江大学 Simple calibration apparatus of embedded earth pressure box in sandy soil medium
CN105319123A (en) * 2015-03-16 2016-02-10 河南工业大学 Multifunctional model test pile
CN107144377A (en) * 2017-05-19 2017-09-08 中南大学 A kind of soil pressure testing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1064516A (en) * 1963-06-18 1967-04-05 Fives Lille Cail Measurement of compressive loads
CN101315309A (en) * 2007-05-31 2008-12-03 拉尔夫·克林伯格 Ultrasonic wave pressure transducer and air pressure monitoring device
CN101358455A (en) * 2008-08-14 2009-02-04 上海交通大学 Lateral earth pressure sensor embedment method and device in earth
CN101487249A (en) * 2008-12-30 2009-07-22 中国科学院武汉岩土力学研究所 Embedding apparatus and method for earth pressure box

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1064516A (en) * 1963-06-18 1967-04-05 Fives Lille Cail Measurement of compressive loads
CN101315309A (en) * 2007-05-31 2008-12-03 拉尔夫·克林伯格 Ultrasonic wave pressure transducer and air pressure monitoring device
CN101358455A (en) * 2008-08-14 2009-02-04 上海交通大学 Lateral earth pressure sensor embedment method and device in earth
CN101487249A (en) * 2008-12-30 2009-07-22 中国科学院武汉岩土力学研究所 Embedding apparatus and method for earth pressure box

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈群等: "一种新型楔形拉筋钢筋土挡墙的原型观测", 《岩土工程学报》 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105319123A (en) * 2015-03-16 2016-02-10 河南工业大学 Multifunctional model test pile
CN105319123B (en) * 2015-03-16 2018-08-14 河南工业大学 A kind of allpurpose model test pile
CN104748894A (en) * 2015-04-17 2015-07-01 中国工程物理研究院总体工程研究所 Sputter film type soil pressure sensor
CN104848988A (en) * 2015-05-14 2015-08-19 浙江大学 Simple calibration apparatus of embedded earth pressure box in sandy soil medium
CN104848988B (en) * 2015-05-14 2017-05-24 浙江大学 Simple calibration apparatus of embedded earth pressure box in sandy soil medium
CN107144377A (en) * 2017-05-19 2017-09-08 中南大学 A kind of soil pressure testing device
CN107144377B (en) * 2017-05-19 2019-07-02 中南大学 A kind of soil pressure testing device

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Application publication date: 20120718

C02 Deemed withdrawal of patent application after publication (patent law 2001)