CN107059833A - Site foundation dynamic compression modulus tester - Google Patents
Site foundation dynamic compression modulus tester Download PDFInfo
- Publication number
- CN107059833A CN107059833A CN201710237076.XA CN201710237076A CN107059833A CN 107059833 A CN107059833 A CN 107059833A CN 201710237076 A CN201710237076 A CN 201710237076A CN 107059833 A CN107059833 A CN 107059833A
- Authority
- CN
- China
- Prior art keywords
- compression modulus
- dynamic compression
- force
- center rest
- ground
- 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
Links
- 230000006835 compression Effects 0.000 title claims abstract description 20
- 238000007906 compression Methods 0.000 title claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 238000002474 experimental method Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 206010003671 Atrioventricular Block Diseases 0.000 claims 1
- 208000010271 Heart Block Diseases 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 9
- 239000004576 sand Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
Abstract
The invention discloses a kind of site foundation dynamic compression modulus tester, including laser displacement gauge (200), the experiment load maintainer that stands on ground for standing on foundation surface, and data processing case (100), it is described experiment load maintainer center rest (4) on be provided with vertical rails (20).Counter-force module (5), linear vibration exciter (6), the loading hammer (8) of small area are fixedly connected, and are slidably coupled to by assembly pulley (3) on center rest (4)；By the level of center rest (4) and slide rail straight limit vibrator (6) and counter-force module (5) to motion, it is set to produce good movement in vertical direction, the impact of vertical direction exciting force, which is provided, by linear vibration exciter (6) acts on the tested soil body, power and displacement relation curve are gathered by force snesor (7) and laser displacement gauge, ground dynamic compression modulus is finally obtained by data processing case.
Description
Technical field
The present invention relates to centrifugal modeling Shen Bei, especially a kind of ground work for test site ground dynamic compression modulus
Cheng Yuanwei exploration equipments.
Background technology
In recent years, violent earthquake is increasingly frequent all over the world, or even can trigger the secondary calamity such as tsunami, landslide, avalanche, ground fissure
Evil.In China, many destructive very big earthquakes also occurred in history, the Sichuan violent earthquake using 08 year is very, it can be seen that,
Earthquake disaster causes great threat to people's security of the lives and property.
When building is acted on by earthquake, dynamic loads are produced to ground.Ground is produced further under dynamic loads
Compression Settlement, cause building inclination, cracking, building is caused damage.This equipment is by applying dynamic lotus to ground
Carry, the Compression Settlement that measurement ground is produced under dynamic loads, so as to measure the dynamic compression modulus of ground.In current specifications
Have been written that with stratigraphic compression modulus correlation test and computational methods, but be also not directed in terms of dynamic ground modulus of compressibility
Hold.This equipment has filled up blank of the current specifications in terms of dynamic ground modulus of compressibility is tested with calculating, is to dynamic in engineering
The further application of modulus of compressibility provides reference.
The content of the invention
It is an object of the invention to provide a kind of test equipment for measuring ground dynamic compression modulus, to ground dynamic compression mould
Amount is tested.
The technical solution adopted in the present invention is：
A kind of site foundation dynamic compression modulus tester, including stand on the laser displacement gauge 200 of foundation surface, stand on ground
Experiment load maintainer on base, and acquisition process laser displacement gauge obtain foundation displacement information and experiment load maintainer loading letter
The data processing case 100 of breath, it is described experiment load maintainer composition be：Vertical rails 20 are provided with center rest 4；Counter-force mould
Block 5, linear vibration exciter 6, the loading hammer 8 of small area are fixedly connected, and are slidably coupled to center rest by assembly pulley 3
On 4, the assembly pulley 3 agrees with the slide rail on center rest；The linear vibration exciter 6 is two synchronous motors, motor output
Axle is provided with eccentric block group 9；The power sensing 7 for obtaining loading impulsive force is equipped with the loading hammer 8.
Linear vibration exciter 6 makes two motor synchronous averagings after powered up, and motor drives two groups of eccentric massblock opposite direction rotatings,
Vertical sinusoidal wave exciting force is produced, dynamic loads are applied to ground；Eccentric massblock angle is adjustable, for controlling exciting force defeated
Go out.By the level of center rest 4 and slide rail straight limit vibrator 6 and counter-force module 5 to motion, make linear vibration exciter 6 with
Counter-force module 5 can only produce displacement in vertical direction.Top counter-force module 5 according to loading grade increase mass there is provided more than
The counter-force of exciting force peak value.
So, operationally, loading hammer 8 is under the collective effect of linear vibration exciter 6 and counter-force module 5, to tested place
Transmit dynamic pressure；The record pressure condition of force snesor 7 on loading hammer 8 is installed on, the laser position by loading support is installed on
The record loading hammer sedimentation deformation of meter 2 is moved, so as to obtain being used to calculate ground dynamic compression modulus data.
Brief description of the drawings is as follows：
Fig. 1 is a kind of dynamic compression modulus test equipment overall schematic of the invention.
Fig. 2 is linear vibration exciter schematic three dimensional views of the present invention.
Fig. 3 is pulley of the present invention and slide rail schematic three dimensional views.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include but is not limited to
The following example.
By Fig. 1 it can be seen that, center rest 4 is fixed on tested place by steel nail.Straight-line oscillation source, loading hammer 8, counter-force
The part of module 5 three, is connected by pulley and slide rail with center rest 4.Pass through center rest 4 and slide rail straight limit vibrator
6 with the level of counter-force module 5 to motion, make it can only be in movement in vertical direction；System provides Vertical Square by linear vibration exciter 6
To exciting force, the tested soil body is acted on by loading hammer 8, power and displacement relation are gathered by force snesor 7 and laser displacement gauge 200
Curve, finally obtains ground dynamic compression modulus by data processing case 100.
It is the schematic diagram of linear vibration exciter 6 to scheme (2), in system quiescence, and two groups on two motors of linear vibration exciter are eccentric
Mass center of gravity is located at same horizontal line, and both initial phases of control are identical.
During specific test, place need to have some strength, be suitable as the place of works ground；Fine grained soil (silt,
Sand) it need to can be detected under the conditions of compacting.Test site need to be the smooth ground without pit-hole.For coarse-grained soil compound
The surface irregularity caused, it should lay sand or gypsum putty in one layer of about 2~3mm drying.
During specific test, center rest 4 is installed on test site, and adjusted to level, by steel nail fixed support in
Test site；Counter-force module 5, linear vibrator are installed, the overall inside center rest 4 of the composition of hammer 8 is loaded, passes through both
Pulley slide rail agrees with；According to loading rank, the mass of adjustment counter-force module 5；Switch on power, return to zero sensor, confirms errorless laggard
Row loading test.
Device provided by the present invention, structure is reliable, and easy to operate, each module is detachably assembled, and greatly facilitates wide
A big line reconnoitres tester.
Claims (5)
1. a kind of site foundation dynamic compression modulus tester, including stand on the laser displacement gauge (200) of foundation surface, stand on ground
Experiment load maintainer on base, and acquisition process laser displacement gauge (200) obtain foundation displacement information and experiment load maintainer
The data processing case (100) of load information, it is characterised in that it is described experiment load maintainer composition be：Center rest is set on (4)
It is equipped with vertical rails (20)；Counter-force module (5), linear vibration exciter (6), the loading hammer (8) of small area are fixedly connected, and passed through
Assembly pulley (3) is slidably coupled on center rest (4), and the assembly pulley (3) is agreed with the slide rail on center rest；It is described
Linear vibration exciter (6) is two synchronous motors, and motor output shaft is provided with eccentric block group (9)；It is equipped with and obtains on the loading hammer (8)
Take the force snesor (7) of loading impulsive force.
2. site foundation dynamic compression modulus tester according to claim 1, it is characterised in that the center rest
(4) ground is fixed on by steel nail.
3. site foundation dynamic compression modulus tester according to claim 1, it is characterised in that loading hammer (8) is straight
Footpath is 30cm circle.
4. site foundation dynamic compression modulus tester according to claim 1, it is characterised in that counter-force module (5) matter
Amount is according to the big minor adjustment of exciting force.
5. site foundation dynamic compression modulus tester according to claim 1, it is characterised in that linear vibration exciter it is inclined
Heart block group (9) adjusts relative angle to adjust exciting force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710237076.XA CN107059833A (en) | 2017-04-12 | 2017-04-12 | Site foundation dynamic compression modulus tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710237076.XA CN107059833A (en) | 2017-04-12 | 2017-04-12 | Site foundation dynamic compression modulus tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107059833A true CN107059833A (en) | 2017-08-18 |
Family
ID=59603294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710237076.XA Pending CN107059833A (en) | 2017-04-12 | 2017-04-12 | Site foundation dynamic compression modulus tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107059833A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748632A (en) * | 1980-08-06 | 1982-03-20 | Saginomiya Seisakusho Inc | Dynamic characteristic measuring device |
| CN1032397A (en) * | 1987-02-28 | 1989-04-12 | 中国化学工程总公司北京重型机械化公司 | Apparatus for dynamically measuring bearing capacity of foundation |
| CN1055405A (en) * | 1991-05-09 | 1991-10-16 | 冶金工业部建筑研究总院 | The dynamic measuring method of foundation deformation modulus and bearing capacity |
| CN2399450Y (en) * | 1999-12-06 | 2000-10-04 | 铁道建筑研究设计院 | Monkey hammer type dynamic deforming modulus tester |
| CN101413275A (en) * | 2008-10-29 | 2009-04-22 | 山东大学 | Foundation accumulating and sedimentation in-situ simulating apparatus and method under action of traffic loading |
| CN102677564A (en) * | 2012-04-28 | 2012-09-19 | 李祥莹 | Dynamic compactor for subgrade |
| CN104634650A (en) * | 2014-12-06 | 2015-05-20 | 武汉科技大学 | Vibration excitation device with magnetic force centering function for roadbed dynamic response test |
| US20160238501A1 (en) * | 2013-10-11 | 2016-08-18 | Dynatest International A/S | Falling weight deflectometer |
| US9471721B1 (en) * | 2012-01-18 | 2016-10-18 | Bernard J. Gochis | Process for dynamic design of pile foundation systems using tunable pile members capable of absorbing vibrations |
| CN106501079A (en) * | 2016-10-26 | 2017-03-15 | 河北建筑工程学院 | A kind of roadbed power stress model pilot system |
| CN206736883U (en) * | 2017-04-12 | 2017-12-12 | 西南交通大学 | Site foundation dynamic compression modulus tester |
-
2017
- 2017-04-12 CN CN201710237076.XA patent/CN107059833A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748632A (en) * | 1980-08-06 | 1982-03-20 | Saginomiya Seisakusho Inc | Dynamic characteristic measuring device |
| CN1032397A (en) * | 1987-02-28 | 1989-04-12 | 中国化学工程总公司北京重型机械化公司 | Apparatus for dynamically measuring bearing capacity of foundation |
| CN1055405A (en) * | 1991-05-09 | 1991-10-16 | 冶金工业部建筑研究总院 | The dynamic measuring method of foundation deformation modulus and bearing capacity |
| CN2399450Y (en) * | 1999-12-06 | 2000-10-04 | 铁道建筑研究设计院 | Monkey hammer type dynamic deforming modulus tester |
| CN101413275A (en) * | 2008-10-29 | 2009-04-22 | 山东大学 | Foundation accumulating and sedimentation in-situ simulating apparatus and method under action of traffic loading |
| US9471721B1 (en) * | 2012-01-18 | 2016-10-18 | Bernard J. Gochis | Process for dynamic design of pile foundation systems using tunable pile members capable of absorbing vibrations |
| CN102677564A (en) * | 2012-04-28 | 2012-09-19 | 李祥莹 | Dynamic compactor for subgrade |
| US20160238501A1 (en) * | 2013-10-11 | 2016-08-18 | Dynatest International A/S | Falling weight deflectometer |
| CN104634650A (en) * | 2014-12-06 | 2015-05-20 | 武汉科技大学 | Vibration excitation device with magnetic force centering function for roadbed dynamic response test |
| CN106501079A (en) * | 2016-10-26 | 2017-03-15 | 河北建筑工程学院 | A kind of roadbed power stress model pilot system |
| CN206736883U (en) * | 2017-04-12 | 2017-12-12 | 西南交通大学 | Site foundation dynamic compression modulus tester |
Non-Patent Citations (2)
| Title |
|---|
| 殷祥超: "《振动理论与测试技术》", 30 June 2015, 中国矿业大学出版社 * |
| 苏谦等: "刚性地基低路堤长期动力特性原位试验研究", 《土木工程学报》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tsiavos et al. | A sand-rubber deformable granular layer as a low-cost seismic isolation strategy in developing countries: Experimental investigation | |
| Chen et al. | Shaking table test of a multi-story subway station under pulse-like ground motions | |
| Mikola et al. | Seismic earth pressures on retaining structures in cohesionless soils | |
| CN109706981B (en) | Vibrating table model test system for high-steep slope pier foundation stress deformation characteristics | |
| Thevanayagam et al. | Laminar box system for 1-g physical modeling of liquefaction and lateral spreading | |
| Sahadewa et al. | Field testing method for evaluating the small-strain shear modulus and shear modulus nonlinearity of solid waste | |
| Zhou et al. | Dynamic failure mode and dynamic response of high slope using shaking table test | |
| Prakash | Analysis of rigid retaining walls during earthquakes | |
| CN105737970B (en) | The method and device of stress wave propagation rule under the axial approximate gradient static stress of test | |
| CN206736883U (en) | Site foundation dynamic compression modulus tester | |
| CN104695416B (en) | Roadbed forced ramming reinforcing effect evaluation method | |
| Falkner et al. | Rapid impact compaction for middle-deep improvement of the ground–numerical and experimental investigation | |
| El-Emam et al. | Effect of reinforcement design on seismic response of reinforced soil retaining walls | |
| CN207881832U (en) | A kind of measurement device of the ground designated depth horizontal direction impedance,motional based on pulse excitation difference response analysis | |
| CN107059833A (en) | Site foundation dynamic compression modulus tester | |
| Scott et al. | Full-scale dynamic lateral pile tests | |
| Ali et al. | Response of circular footing on dry dense sand to impact load with different embedment depths | |
| CN108344498A (en) | A kind of measurement device and method of the ground designated depth horizontal direction impedance,motional based on pulse excitation difference response analysis | |
| Ahmed et al. | Experimental analysis of the dynamic response of saturated clayey soil under impact loading | |
| Zheng et al. | Acceleration Response of a Geosynthetic Reinforced Soil Bridge Abutment under Dynamic Loading | |
| Shivamanth et al. | Study of the light weight deflectometer and reviews | |
| Lee et al. | Numerical Back-analysis of Caisson Quay Walls in the Yeong-il Bay Port during the 2017 Pohang Earthquake | |
| Wu | Measuring dynamic properties of wind turbine foundation soil in resonant column-Issues and challenges | |
| Jianrong et al. | 3-D Shaking Table Model Test Study on Dynamic Response of Composite Block Slope with Complex Structural Planes | |
| Shen et al. | Comparison and Analysis of Dynamic Stiffness Tests of Natural Foundation and Pile Foundation under Forced Vibration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180209 Address after: 610031 Sichuan City, Chengdu Province, No. two North Ring Road, No. 111 Applicant after: SOUTHWEST JIAOTONG University Applicant after: ZHENGZHOU CNEC GEOTECHNICAL ENGINEERING CO.,LTD. Applicant after: CHINA NUCLEAR ENGINEERING & CONSTRUCTION Corp.,Ltd. Address before: 610031 Sichuan City, Chengdu Province, No. two North Ring Road, No. 111 Applicant before: Southwest Jiaotong University Applicant before: ZHENGZHOU CNEC GEOTECHNICAL ENGINEERING CO.,LTD. |
|
| TA01 | Transfer of patent application right | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170818 |
|
| WD01 | Invention patent application deemed withdrawn after publication |