CN1804241A - Static load test device for composite foundation - Google Patents
Static load test device for composite foundation Download PDFInfo
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- CN1804241A CN1804241A CN 200610012379 CN200610012379A CN1804241A CN 1804241 A CN1804241 A CN 1804241A CN 200610012379 CN200610012379 CN 200610012379 CN 200610012379 A CN200610012379 A CN 200610012379A CN 1804241 A CN1804241 A CN 1804241A
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- soil
- bearing plate
- test device
- composite foundation
- stress
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Abstract
The invention relates to a test device used in rock project, which provides a integrated groundsill stable loading test device to solve the problem that present test device can only test the whole stress and deformation and it can not test the working properties of post and soil at the same time when the stress and deformation are different with actual condition. It arranges a central support plate above the post; a circular support plate above the soil between posts; and a rigid support plate above the central and circular support plates while it connects said two plates with springs. Wherein, the central, circular and rigid support plates have a force sensor and a displacement sensor. The invention can synchronously test the whole stress and deformation of post and soil and their individual stress and deformation to attain the stress rate between them, to show the actual working property of post-soil integration.
Description
Technical field
The present invention relates to a kind of geotechnical engineering experimental rig, particularly a kind of static load test device for composite foundation.
Background technology
Along with the develop rapidly of engineering construction, ground is handled means and is also becomed more diverse, and composite foundation has obtained more and more widely application with the coefficient peculiar advantage of pile body with relative cheap construction costs owing to it makes full use of inter-pile soil.Composite foundation technology development has in recent years all obtained significant progress from construction machinery, material therefor, the theory of computation, construction technology aspects rapidly, has brought into play enormous function in industry and civilian construction.In the composite foundation design, the mattress layer that certain thickness prose style free from parallelism granular materials is formed being set between basis and pile body and the inter-pile soil, is a distinctive core technology of composite foundation.Whether the basis is provided with mattress layer down, very big to the composite foundation stressing influence.If mattress layer is not set, the composite foundation bearer properties is similar to pile foundation, and the inter-pile soil supporting capacity is difficult to performance, can not become composite foundation.By the corrective action of mattress layer, just can give full play to the carrying effect of inter-pile soil, make stake, soil bear load jointly, thereby can save construction costs.But composite foundation still has some problems not to be resolved in detecting always, and wherein subject matter is " test of pile and soil complex performance ", is presented as:
1. calculating aspect: the Bearing Capacity of Composite Foundation design formulas is among " building lot treatment technology standard " JGJ79-2002:
Or: f
Spk=[1+m (n-1)] f
Sk
(1) R wherein
aBe bearing capacity of single pile test value, f
SkBeing inter-pile soil bearing capacity empirical value or bearingtest value natively, is not stake, native coefficient bearing capacity performance value, the Bearing Capacity of Composite Foundation f of Ji Suaning thus
SpkWith actual error arranged.
(2) n is stake, soil stress ratio, can't obtain in existing test, can only use estimated value in the calculating, and " building lot treatment technology standard " suggestion gets 3～4, can not get stake, native coefficient performance, just can't correctly calculate Bearing Capacity of Composite Foundation f
Spk
2. test aspect: commonly used at present is with the method for rigidity pressing plate, promptly directly is pressed onto test compound bearing capacity of foundation soil on pile body and the inter-pile soil with the rigidity pressing plate.This moment, pile body was consistent with the distortion of inter-pile soil all the time, can embodies the corrective action of mattress layer, also can not survey owing to, the power shared of native rigidity difference is different with distortion.In fact, service behaviour and actual engineering force status when testing in the present method of testing are inconsistent, and the overall stressed and distortion when measured stake, native acting in conjunction just is not the real stressed and characteristic of being out of shape of compound base yet.
Summary of the invention
When the present invention can only record stake, native acting in conjunction in order to solve in the prior art static load test device for composite foundation commonly used overall stressed be out of shape, do not embody the effect of mattress layer, measured stressed, distortion and actual loading, distortion situation are different, and a kind of static load test device for composite foundation is provided.
The present invention adopts following technical scheme to realize, static load test device for composite foundation, the pile body top is provided with the center bearing plate, the inter-pile soil top is provided with the annular bearing plate, rigid bearing plate is located at center bearing plate and annular bearing plate top, and be connected with spring respectively with two bearing plates, on center bearing plate, annular bearing plate, the rigid bearing plate strong sensor and displacement transducer are set all.
The present invention changes original monoblock rigid bearing plate into a roundlet template (its area equals the pile body topside area) and an annular slab (its area equals the inter-pile soil topside area) as pressing plate, and is middle with spring power transmission (being equivalent to the effect of mattress layer).When exerting pressure, stake soil is out of shape separately.With load cell difference peg, the suffered power of soil, with displacement transducer peg and native distortion respectively.Like this, stake, the power of soil when acting in conjunction can record in real time with distortion, and the top still can record the power and the distortion of pile soil common action.
Beneficial effect of the present invention is as follows: the overall stressed and distortion in the time of can recording acting in conjunction simultaneously, also can record the stressed and distortion when acting in conjunction and separately of stake, soil, can obtain stake, soil stress ratio, embody the effect of mattress layer, can record the real work performance of pile and soil complex.
Description of drawings
Fig. 1 is the static load test device for composite foundation schematic diagram
Among the figure: 1-rigid bearing plate, 2-spring, 3-power sensor, 4-displacement transducer, 5-inter-pile soil, 6-pile body, 7-center bearing plate, 8-annular bearing plate.
The specific embodiment
In conjunction with the accompanying drawings embodiments of the present invention are described further, present embodiment is to be used for illustrating of the present invention, rather than the present invention is done any restriction.
Static load test device for composite foundation, pile body 6 tops are provided with center bearing plate 7, inter-pile soil 5 tops are provided with annular bearing plate 8, rigid bearing plate 1 is located at center bearing plate 7 and annular bearing plate 8 tops, and be connected with spring 2 respectively with two bearing plates, strong sensor 3 and displacement transducer 4 all are set on center bearing plate 7, annular bearing plate 8, the rigid bearing plate 1.
When exerting pressure, pile body 6 is out of shape separately with inter-pile soil 5.With the load cell 4 suffered power of peg bodies 6, inter-pile soil 5 respectively, with displacement transducer 4 distortion of peg bodies 6, inter-pile soil 5 respectively.Like this, pile body 6, the power of inter-pile soil 5 when acting in conjunction can record in real time with distortion, and the top still can record pile body 6, inter-pile soil 5 coefficient power and distortion.
Claims (1)
1, a kind of static load test device for composite foundation, it is characterized in that pile body (6) top is provided with center bearing plate (7), inter-pile soil (5) top is provided with annular bearing plate (8), rigid bearing plate (1) is located at center bearing plate (7) and annular bearing plate (8) top, and use spring (2) to be connected respectively with two bearing plates, strong sensor (3) and displacement transducer (4) all are set on center bearing plate (7), annular bearing plate (8), the rigid bearing plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100123793A CN100363730C (en) | 2006-01-23 | 2006-01-23 | Static load test device for composite foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100123793A CN100363730C (en) | 2006-01-23 | 2006-01-23 | Static load test device for composite foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1804241A true CN1804241A (en) | 2006-07-19 |
| CN100363730C CN100363730C (en) | 2008-01-23 |
Family
ID=36866373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100123793A Expired - Fee Related CN100363730C (en) | 2006-01-23 | 2006-01-23 | Static load test device for composite foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100363730C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628767A (en) * | 2012-03-23 | 2012-08-08 | 河海大学 | Device and method for testing mechanical properties of pile-soil contact surface |
| CN102912812A (en) * | 2011-08-03 | 2013-02-06 | 同济大学 | Model test device for simulating jacked pile driving process |
| CN102926386A (en) * | 2012-10-24 | 2013-02-13 | 常州工学院 | Compression pile auxiliary device and application method thereof |
| CN104196060A (en) * | 2014-07-10 | 2014-12-10 | 河海大学 | CFG pile composite roadbed rubber spacer static load testing device and method |
| CN107036923A (en) * | 2017-06-14 | 2017-08-11 | 合肥工业大学 | It is a kind of to be used for the friction wear testing machine and friction and wear test method of hard alloy or wear-resistant coating |
| CN107655762A (en) * | 2017-09-22 | 2018-02-02 | 安徽理工大学 | A kind of composed coal and rock Burst Tendency experiment simulator and method |
| CN108760517A (en) * | 2018-05-22 | 2018-11-06 | 西南交通大学 | The coefficient of subgrade reaction K of sand-filled subgrade30Correction test device and its test method |
| CN108894258A (en) * | 2018-04-04 | 2018-11-27 | 中南林业科技大学 | A kind of test method of multi-column pier foundation bearing ratio in piles and soils |
| CN113718744A (en) * | 2021-08-24 | 2021-11-30 | 珠海市规划设计研究院 | Multi-pile composite foundation bearing capacity testing method |
| CN113789821A (en) * | 2021-10-13 | 2021-12-14 | 江苏河海工程建设监理有限公司 | Pile foundation detection device for building engineering supervision and application method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US5345826A (en) * | 1993-05-04 | 1994-09-13 | Strong David J | Static load tester with I-beam support column |
| JPH07260652A (en) * | 1994-03-18 | 1995-10-13 | Ishikawajima Harima Heavy Ind Co Ltd | Static load tester |
| CN2294466Y (en) * | 1997-06-16 | 1998-10-14 | 陈国卫 | Detector for anti-pressure strength |
| CN1188688C (en) * | 2002-09-28 | 2005-02-09 | 清华大学 | Circular loading shear apparatus for observing earth and structural member contact face mechanical property |
| CN2813719Y (en) * | 2006-01-23 | 2006-09-06 | 太原电力高等专科学校 | Compound foundation static load test device |
-
2006
- 2006-01-23 CN CNB2006100123793A patent/CN100363730C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912812A (en) * | 2011-08-03 | 2013-02-06 | 同济大学 | Model test device for simulating jacked pile driving process |
| CN102628767A (en) * | 2012-03-23 | 2012-08-08 | 河海大学 | Device and method for testing mechanical properties of pile-soil contact surface |
| CN102628767B (en) * | 2012-03-23 | 2014-01-22 | 河海大学 | Device and method for testing mechanical properties of pile-soil contact surface |
| CN102926386A (en) * | 2012-10-24 | 2013-02-13 | 常州工学院 | Compression pile auxiliary device and application method thereof |
| CN104196060A (en) * | 2014-07-10 | 2014-12-10 | 河海大学 | CFG pile composite roadbed rubber spacer static load testing device and method |
| CN104196060B (en) * | 2014-07-10 | 2015-07-15 | 河海大学 | CFG pile composite roadbed rubber spacer static load testing device and method |
| CN107036923A (en) * | 2017-06-14 | 2017-08-11 | 合肥工业大学 | It is a kind of to be used for the friction wear testing machine and friction and wear test method of hard alloy or wear-resistant coating |
| CN107655762A (en) * | 2017-09-22 | 2018-02-02 | 安徽理工大学 | A kind of composed coal and rock Burst Tendency experiment simulator and method |
| CN108894258A (en) * | 2018-04-04 | 2018-11-27 | 中南林业科技大学 | A kind of test method of multi-column pier foundation bearing ratio in piles and soils |
| CN108760517A (en) * | 2018-05-22 | 2018-11-06 | 西南交通大学 | The coefficient of subgrade reaction K of sand-filled subgrade30Correction test device and its test method |
| CN113718744A (en) * | 2021-08-24 | 2021-11-30 | 珠海市规划设计研究院 | Multi-pile composite foundation bearing capacity testing method |
| CN113789821A (en) * | 2021-10-13 | 2021-12-14 | 江苏河海工程建设监理有限公司 | Pile foundation detection device for building engineering supervision and application method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100363730C (en) | 2008-01-23 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080123 Termination date: 20140123 |