CN104075945B - Anchoring structure rheological testing machine and method for simulating rheological properties of geologic structure body by utilizing machine - Google Patents

Anchoring structure rheological testing machine and method for simulating rheological properties of geologic structure body by utilizing machine Download PDF

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Publication number
CN104075945B
CN104075945B CN201410324604.1A CN201410324604A CN104075945B CN 104075945 B CN104075945 B CN 104075945B CN 201410324604 A CN201410324604 A CN 201410324604A CN 104075945 B CN104075945 B CN 104075945B
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anchoring
anchor pole
test
rheological
anchor
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CN104075945A (en
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张磊
纪洪广
由爽
向鹏
张月征
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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Abstract

The invention provides a testing system and method for simulating rheological properties of an anchor rod and an anchoring body by utilizing an anchoring structure rheological testing machine. The anchoring structure rheological testing machine comprises a loading framework, a test sample clamping and movable transverse beam, a rheological loading device, a measurement and control device and a computer. The loading framework is provided with the anchor rod and the anchoring body and is fixed by a test sample clip; the anchor rod is loaded through the rheological loading device; a loading process is controlled by the computer, and various measurement parameters and a stress change curve of the anchor rod and the anchoring body are displayed in real time. The testing system is small in noises, has no pollution, is economical and is convenient to operate.

Description

A kind of anchor structure rheological test machine and its simulation geological substance rheological behavior Method
Technical field
The invention belongs to theological damage field, specifically propose a kind of using anchor structure rheological test machine simulation anchor pole with The method of geological substance rheological behavior under country rock collective effect, can effectively simulation difference anchorage length for anchor pole itself Anchor force operating radius, stress distribution under the conditions of the distribution of force structure and change, and different anchoring.
Background technology
In order to maintain stablizing of tunnel, prevent country rock to be caving or larger deformation is it is therefore desirable to suspension roof support.Anchor " supporting body " of the country rock composition of bar and institute's supporting itself rigidity and intensity characteristic preferably, so anchor pole has constraint country rock Deformation keeps stable effect.Therefore, research anchor pole and the mechanical mechanism of shoulder bed effects have weight to the supporting performance improving anchor pole The meaning wanted.The research of traditional anchor structure, only in the simulation aspect of theory analysis and software, can not be real Reflect the mechanism with country rock body in drawing process for the anchor pole.The present invention proposes a kind of anchor structure rheological test machine test System, by monitoring the pressure of anchor pole, the deformation of anchor structure and anchoring body in drawing process, research rockbolt stress structure Distribution, the Changing Pattern and anchor structure stress distribution in the range of different radii.
Content of the invention
The present invention, in order to overcome deficiency of the prior art, proposes to simulate anchor using country rock anchor structure rheological test system Bar and the rheological behavior of geological structure body under country rock collective effect, study different anchorage lengths for anchor pole itself force structure The characteristic such as the radius of anchor force effect, stress distribution under the conditions of distribution and change, and different anchoring.
A kind of anchor structure rheological test machine, special with geological substance rheology under country rock collective effect for simulating anchor pole Property, whole testing machine is arranged on loading frame, and loading frame includes base, support and rack platform, and described testing machine also wraps Include:
Moved cross beam, is connected by draw-in groove and is arranged on rack platform side it is possible to move along draw-in groove direction;
Specimen holder, is arranged on moved cross beam, is used for fixing anchoring body;
Drawing jack, is arranged on the opposite side of rack platform, for fixing anchor bar;
Servomotor, produces stable pressure environment, acts on drawing jack;
Hydraulic oil source, passes to servomotor by producing test force;
Computer measurement and control system, controls servomotor and gathered data;
Described testing machine also includes anchor pole strain gauge and anchoring body stressometer is used for the dependent variable of measurement anchor pole and anchor respectively The STRESS VARIATION of solid;
The STRESS VARIATION of the dependent variable of described anchor pole and anchoring body passes through strain acquirement instrument and stress Acquisition Instrument respectively by number According to being transferred in computer.
Further, described hydraulic oil source produces the test force of 10kn.
A kind of method of the rheological behavior of geological substance under simulation anchor pole and country rock collective effect, methods described utilizes institute The testing machine stated, the method comprising the steps of:
1) anchor pole and anchoring body are arranged on moved cross beam, anchoring is fixed by the sample clamp device on moved cross beam Body;According to the size of sample, by moved cross beam come Adjustment Tests space, the movement of crossbeam is using automatic working method;
2) adjust charger by crossbeam and obtain suitable test space, servomotor promotes piston in cylinder Oil pressurization produce test force, just can carry out pull-out test to anchor pole;
3) anchor pole and anchoring body deformation are connected to computer with pressure measxurement passage, are controlled by computer instruction whole Pull-out test process, simultaneous computer is able to record that the dependent variable of anchor pole and the stress of anchoring body, and draws out curve.
Theological damage in the present invention adopts servomotor and hydraulic oil source common mode control, to anchor rod drawing process In, by the deformation using strain gauged anchor pole different parts, study distribution and the Changing Pattern of force structure;By adopting Monitor deformation and the pressure of anchoring body with the mode of pre-buried foil gauge, measure the stress in the range of anchor structure different radii and divide Cloth state.
Rheology charger in the present invention is to drive ball-screw to promote piston the oil having in cylinder with servomotor Pressurization, produces test force, test is pressurizeed, the control system of testing machine adopts computer operation, can show in real time It is arranged on the output signal (showing after quantization) of force transducer on load cylinder, show and be embedded in answering of anchoring body internal strain piece Power output (shows after quantization).
Testing machine major parameter
1st, maximum draws test force: 1000kn
2nd, test force resolution: 1/180000
3rd, pilot strength measurement error :≤± 1%
4th, deformation measurement scope: 0~10mm
5th, deformation measurement resolution: 0.002mm
6th, deformation measurement error :≤± 1%
7th, pressure (stress) measurement error :≤± 1%
8th, test space: 4000 × 800 (long × wide) mm
9th, stream time: >=1000 hours
10th, deformation and pressure measxurement passage: 15
11st, Overall Power Consumption: ac 380v three-phase five-wire mode 2kw
12nd, machine shape size: 5000 × 1200 × 800 (long × deep × high) mm.
Brief description
Fig. 1 is the country rock anchor structure rheological test system structure chart of the present invention.
Specific embodiment
The present invention will elaborate to the specific embodiment of the present invention with reference to Figure of description:
Referring to Fig. 1, it is the anchor structure rheological test machine of the present invention, whole testing machine is arranged on loading frame, load Framework is made up of base, support and rack platform.
Wherein specimen holder and moved cross beam, is connected by draw-in groove and is arranged on rack platform it is possible to along draw-in groove direction Mobile;The effect of specimen holder is fixing sample it is ensured that sample will not produce lateral displacement in process of the test.
Movable transverse beam action be in adjustment sample the position of anchoring body and installing space it is ensured that sample can meet tests Require.
Hydraulic oil source can produce the test force of 10kn, but it can not maintain for a long time.Hydraulic oil source by produce 10kn test force passes to servomotor, by servomotor itself lock test power, and test force is acted on drawing jack.
Servomotor is controlled by computer measurement and control system, and the test force of the 10kn that hydraulic oil source produces is locked Fixed, maintain stable pressure environment, and test force is passed to drawing jack.
Drawbench is arranged on the left side of rack platform, and its effect is fixing anchor bar, and servomotor produces stable pressure rings Border, acts on drawing jack, applies test force to anchor structure (anchoring body).
Anchor pole strain gauge and anchoring body stressometer measure the dependent variable of anchor pole and the STRESS VARIATION of anchoring body respectively.Lead to respectively Overstrain Acquisition Instrument and stress Acquisition Instrument transfer data to computer.
Computer measurement and control system Main Function is the changing value of anchor pole strain and anchoring body in collection process of the test STRESS VARIATION value, and control the test force of servomotor.
Simulate anchor pole and geologic structure under country rock collective effect for the present invention is a kind of using anchor structure rheological test machine The method of the rheological behavior of body to describe according to step:
Step 1): anchor pole and anchoring body are arranged on crossbeam, anchoring body is fixed by the sample clamp device on crossbeam; According to the size of sample, by moved cross beam come Adjustment Tests space, the movement of crossbeam is using automatic working method;
Step 2): adjust charger by crossbeam and obtain suitable test space, servomotor promotes piston The test force that oil pressurization in cylinder is produced, just can carry out pull-out test to anchor pole;
Step 3): the deformation such as anchor pole and anchor structure and pressure measxurement passage are connected to computer, are referred to by computer Order controls whole pull-out test process, and simultaneous computer is able to record that the measurement parameters such as the internal stress of test force, anchoring, and paints Make various curves.
In the present invention whole TT&C system have that easy to operate, fault-tolerance is strong, measurement accurately, defencive function is strong, control The features such as high precision, long-time stability are good, can show various measurement parameters and the curve of anchor structure in real time.

Claims (3)

1. a kind of anchor structure rheological test machine, for simulating anchor pole and geological substance rheological behavior under country rock collective effect, It is characterized in that, whole testing machine is arranged on loading frame, and loading frame includes base, support and rack platform, described examination Machine of testing also includes:
Moved cross beam, is connected by draw-in groove and is arranged on rack platform side it is possible to move along draw-in groove direction;
Specimen holder, is arranged on moved cross beam, is used for fixing anchoring body;
Drawing jack, is arranged on the opposite side of rack platform, for fixing anchor bar;
Servomotor, produces stable pressure environment, acts on drawing jack;
Hydraulic oil source, passes to servomotor by producing test force;
Computer measurement and control system, controls servomotor and gathered data;
Described testing machine also includes anchor pole strain gauge and anchoring body stressometer is used for the dependent variable of measurement anchor pole and anchoring body respectively STRESS VARIATION;
Data is passed by the STRESS VARIATION of the dependent variable of described anchor pole and anchoring body respectively by strain acquirement instrument and stress Acquisition Instrument Defeated in computer.
2. testing machine as claimed in claim 1 is it is characterised in that described hydraulic oil source produces the test force of 10kn.
3. a kind of method simulating anchor pole and the rheological behavior of geological substance under country rock collective effect, methods described utilizes right Require the testing machine described in 1 or 2 it is characterised in that the method comprising the steps of:
1) anchor pole and anchoring body are arranged on moved cross beam, anchoring body is fixed by the sample clamp device on moved cross beam; According to the size of sample, by moved cross beam come Adjustment Tests space, the movement of crossbeam is using automatic working method;
2) adjust charger by crossbeam and obtain suitable test space, servomotor promotes piston to the oil in cylinder The test force that pressurization produces, just can carry out pull-out test to anchor pole;
3) anchor pole and anchoring body deformation are connected to computer with pressure measxurement passage, whole drawing is controlled by computer instruction Process of the test, simultaneous computer is able to record that the dependent variable of anchor pole and the stress of anchoring body, and draws out curve.
CN201410324604.1A 2014-07-09 2014-07-09 Anchoring structure rheological testing machine and method for simulating rheological properties of geologic structure body by utilizing machine Active CN104075945B (en)

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CN105221172B (en) * 2015-09-21 2017-11-17 中国矿业大学 A kind of real-time axle power Non-Destructive Testing calibration system of end-fixed bolter free segment and method
CN105699192A (en) * 2016-03-14 2016-06-22 安徽省建筑科学研究设计院 Pull-out test device of glass fiber rib anti-floating anchor and test method of pull-out test device
CN106437800B (en) * 2016-11-16 2017-07-07 中南大学 A kind of retractor device for anchor-holding force of anchor bolt test

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CN2663974Y (en) * 2003-12-26 2004-12-15 山西晋城无烟煤矿业集团有限责任公司 Full-length drawing experimental bench for anchor rod
CN101196450B (en) * 2007-12-25 2010-06-30 北京有色金属研究总院 Metal wire material stretching mechanical property testing device
CN102507330B (en) * 2011-11-15 2014-08-06 煤炭科学研究总院 Overall drawing test device for mining anchor rod
CN202735156U (en) * 2012-08-09 2013-02-13 山东科技大学 Test platform for anchor rod stress state test
CN102854064A (en) * 2012-09-29 2013-01-02 山东大学 Numerically-controlled tension test system for soil body and test method for same
CN203629967U (en) * 2013-12-17 2014-06-04 浙江普泰克金属制品有限公司 Novel horizontal tensile machine for testing anchor rod

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