CN101435206A - Pile body self-rebound force balance loading case - Google Patents
Pile body self-rebound force balance loading case Download PDFInfo
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- CN101435206A CN101435206A CNA2008101365680A CN200810136568A CN101435206A CN 101435206 A CN101435206 A CN 101435206A CN A2008101365680 A CNA2008101365680 A CN A2008101365680A CN 200810136568 A CN200810136568 A CN 200810136568A CN 101435206 A CN101435206 A CN 101435206A
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Abstract
The invention relates to a pile self-reaction force balance load box, which is arranged at the bottom or middle of a basic pile. The upper plate of the load box is welded together with the steel bar cage of upper segment basic pile, and the lower plate is welded together with the steel bar cage of lower segment basic pile. Hydraulic cylinders are uniformly mounted between the upper plate and the lower plate which have central holes by surrounding and symmetry to the axis of the basic pile, an upper displacement rod is welded on the upper plate, a lower displacement rod is welded on the lower plate; the hydraulic oil pipelines comprise a high pressure oil pipeline and a hydraulic oil return pipe, the oil pipeline of the oil pump in the ground hydraulic station is provided with a high pressure oil pressure gauge, the hydraulic oil return pipe of the ground hydraulic station is provided with a return oil pressure gauge and an oil discharge valve, and the hydraulic oil return pipe is connected with the oil tank of the ground hydraulic station. The invention can improve the test precision of the displacement of the basic pile, judge whether the underground hydraulic system has the hidden trouble of leakage, and ensure the engineering quality of the basic pile.
Description
Technical field
The present invention relates to measure in a kind of building foundation pile driving construction the charger of foundation pile supporting capacity, particularly a kind of pile body self-rebound force balance loading case.
Background technology
The construction of construction-engineering project, particularly highrise building, large-scale structure needs to use a large amount of pile foundations.According to the requirement of country about ground and pile foundation engineering inspection of quality standard, reply foundation pile test pile and engineering piles are carried out the bearing capacity static load and are detected, to determine and to check its bearing capacity of single pile, as the mandatory term of pile quality acceptance requirement.The initial static loading test ballast platform of tradition counterforce device, be on the ballast platform, to use the sand pocket counterweight; Stack sand pocket very heavy, feel unwell complete, consume a large amount of sand pockets, speed is slow, efficiency of construction is low.
The disclosed pile capacity of later development such as utility model patent CN2422636Y is measured and is used the load case, and it is at the bottom of the foundation pile stake or hydraulic jack is settled in the foundation pile stage casing, foundation pile is loaded, to measure the supporting capacity of foundation pile; Has the advantage convenient and swift, that the scope of application is wide.
But in the disclosed technical scheme of this patent, the hydraulic pressure petroleum pipeline that is connected with hydraulic jack from ground hydraulic station has only a high pressure oil inlet pipe, and the pressure release oil return pipe is not set.When hydraulic jack foundation pile is loaded reach rated load after, though the oil pump fuel cut-off is positioned at the foundation pile on the hydraulic jack because and the stake hole between frictional resistance, can significantly not sink.The external force that does not press down, the fluid in the hydraulic jack can not be back to oil pump, can not pressure release in the hydraulic jack, head on foundation pile all the time, will influence measuring accuracy greatly to the foundation pile displacement.Because if the pressure release of hydraulic jack energy, when no longer heading on foundation pile, foundation pile can produce resilience in a small amount, the displacement after the resilience is only the True Data of the actual settling amount of judgement basis stake.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of pile body self-rebound force balance loading case with high measuring accuracy.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of pile body self-rebound force balance loading case, the load case is placed at the bottom of the foundation pile stake or the foundation pile stage casing, the upper plate of load case and epimere foundation pile reinforcing cage are welded as a whole, the reinforcing cage of lower plate and hypomere foundation pile is welded as a whole, and hydraulic jack centers on and be symmetrical in uniform being installed between the upper plate and lower plate that is provided with centre bore of axis of foundation pile; The top offset bar is welded on the upper plate and by the straight-through face of land of protecting pipe, the bottom offset bar is welded on the lower plate and by protecting pipe and is upward through the straight-through face of land of upper plate; The hydraulic pressure petroleum pipeline that connects ground hydraulic station and hydraulic jack is placed in the epimere foundation pile reinforcing cage.Described hydraulic pressure petroleum pipeline comprises high-pressure pipeline and hydraulic oil-returning pipe, on the petroleum pipeline of the oil pump of ground hydraulic station, be provided with high pressure oil transportation oil pressure gauge, be provided with oil return oil pressure gauge and fuel outlet valve on the hydraulic oil-returning pipe of ground hydraulic station, the hydraulic oil-returning pipe is connected with the fuel tank of ground hydraulic station.
The invention has the beneficial effects as follows:
1. the present invention is provided with oil return pipe and fuel outlet valve at ground hydraulic station.When the load case foundation pile is loaded reach rated load after, open the fuel outlet valve on the oil return pipe, the fluid in the hydraulic jack is back to fuel tank, the hydraulic jack pressure release no longer heads on foundation pile, foundation pile can free resilience.The present invention just can record the precise displacement amount of the foundation pile that comprises the foundation pile springback capacity, thereby improves the measuring accuracy in order to the foundation pile displacement of judgement basis pile bearing capacity greatly.
2. the present invention is provided with the import oil pressure gauge on the hydraulic pressure oil inlet pipe of ground hydraulic station, is provided with outlet oil pressure gauge and fuel outlet valve on the hydraulic oil-returning pipe.When hydraulic work system normally, when not leaking, the import oil pressure gauge and the outlet oil pressure gauge very little because of the pressure difference that pipe resistance causes.When hydraulic system took place to leak, the pressure difference of import oil pressure gauge and outlet oil pressure gauge will surpass the pressure difference that pipe resistance caused; For the tester provides hydraulic system, particularly is positioned at the information that there is fault in fluid pressure line below the face of land, just can obtain measuring accuracy after only fixing a breakdown to foundation pile displacement and foundation pile supporting capacity, guarantee the workmanship of foundation pile.
Description of drawings
Fig. 1 be the pile body self-rebound force balance loading case structure and with the schematic perspective view of foundation pile reinforcing cage.
Fig. 2 is the vertical view of pile body self-rebound force balance loading case and ground hydraulic station.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment is shown in Fig. 1-2: a kind of pile body self-rebound force balance loading case, the load case is placed at the bottom of the foundation pile stake or the foundation pile stage casing, the upper plate 4 and the epimere foundation pile reinforcing cage 6 of load case are welded as a whole, lower plate 1 is welded as a whole with the reinforcing cage of hypomere foundation pile, and hydraulic jack 2 centers on and be symmetrical in uniform being installed between the upper plate 4 and lower plate 1 that is provided with centre bore of axis of foundation pile; Top offset bar 5 is welded on the upper plate 4 and by the straight-through face of land of protecting pipe, bottom offset bar 8 is welded on the lower plate 1 and by protecting pipe and is upward through the upper plate 4 straight-through faces of land; The hydraulic pressure petroleum pipeline that connects ground hydraulic station 11 and hydraulic jack 2 is placed in the epimere foundation pile reinforcing cage 6.Described hydraulic pressure petroleum pipeline comprises high-pressure pipeline 3 and hydraulic oil-returning pipe 7, on the petroleum pipeline of the oil pump 10 of ground hydraulic station, be provided with high pressure oil transportation oil pressure gauge 9, be provided with oil return oil pressure gauge 14 and fuel outlet valve 13 on the hydraulic oil-returning pipe 7 of ground hydraulic station, hydraulic oil-returning pipe 7 is connected with the fuel tank 12 of ground hydraulic station.
After displacement bar 5 and 8 is used to measure the foundation pile bearing load, the upper plate 4 of load case and the displacement of lower plate 1, whether the displacement of foundation pile just comes the judgement basis pile bearing capacity qualified according to the displacement of foundation pile.
After hydraulic oil-returning pipe 7 and fuel outlet valve 13 are used to finish loading, allow hydraulic jack 2 pressure releases, no longer head on foundation pile; Foundation pile can free resilience, just can record the precise displacement amount of the foundation pile that comprises the foundation pile springback capacity, thereby improve the measuring accuracy to the foundation pile displacement greatly.
High pressure oil transportation oil pressure gauge 9 and oil return oil pressure gauge 14 are used to judge that hydraulic system particularly is positioned at the face of land following load case and fluid pressure line thereof and whether leaks, whether normally moves; to guarantee measuring accuracy, guarantee the workmanship of foundation pile to foundation pile displacement and foundation pile supporting capacity.
Claims (1)
1. pile body self-rebound force balance loading case, the load case is placed at the bottom of the foundation pile stake or the foundation pile stage casing, the upper plate of load case (4) is welded as a whole with epimere foundation pile reinforcing cage (6), lower plate (1) is welded as a whole with the reinforcing cage of hypomere foundation pile, and hydraulic jack (2) centers on and be symmetrical in uniform being installed between the upper plate (4) and lower plate (1) that is provided with centre bore of axis of foundation pile; Top offset bar (5) is welded on upper plate (4) and upward and by protecting pipe leads directly to the face of land, and bottom offset bar (8) is welded on lower plate (1) and upward and by protecting pipe is upward through the straight-through face of land of upper plate (4); The hydraulic pressure petroleum pipeline that connects ground hydraulic station (11) and hydraulic jack (2) is placed in the epimere foundation pile reinforcing cage (6), it is characterized in that: described hydraulic pressure petroleum pipeline comprises high-pressure pipeline (3) and hydraulic oil-returning pipe (7), on the petroleum pipeline of the oil pump (10) of ground hydraulic station, be provided with high pressure oil transportation oil pressure gauge (9), be provided with oil return oil pressure gauge (14) and fuel outlet valve (13) on the hydraulic oil-returning pipe (7) of ground hydraulic station, hydraulic oil-returning pipe (7) is connected with the fuel tank (12) of ground hydraulic station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101365680A CN101435206A (en) | 2008-12-19 | 2008-12-19 | Pile body self-rebound force balance loading case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101365680A CN101435206A (en) | 2008-12-19 | 2008-12-19 | Pile body self-rebound force balance loading case |
Publications (1)
| Publication Number | Publication Date |
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| CN101435206A true CN101435206A (en) | 2009-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101365680A Pending CN101435206A (en) | 2008-12-19 | 2008-12-19 | Pile body self-rebound force balance loading case |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410178A (en) * | 2013-08-23 | 2013-11-27 | 南昌永祺科技发展有限公司 | Foundation pile bearing capacity detection medium exchanging and filing device |
| CN103410179A (en) * | 2013-08-23 | 2013-11-27 | 南昌永祺科技发展有限公司 | Center-penetrating annular foundation pile bearing capacity detection device |
| CN103422517A (en) * | 2013-08-23 | 2013-12-04 | 南昌永祺科技发展有限公司 | Stacked pile body self-counter-force balance load box |
| CN103850276A (en) * | 2014-03-20 | 2014-06-11 | 南昌永祺科技发展有限公司 | Detecting and reloading technology for load box |
| CN105839678A (en) * | 2016-04-11 | 2016-08-10 | 湖北工业大学 | Improved pile foundation vertical bearing capacity test reverse self-balanced method and testing device |
| CN108166546A (en) * | 2018-01-24 | 2018-06-15 | 中建三局第二建设工程有限责任公司 | A kind of device and construction method that pile foundation preloading is carried out using self-balancing static load |
-
2008
- 2008-12-19 CN CNA2008101365680A patent/CN101435206A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410178A (en) * | 2013-08-23 | 2013-11-27 | 南昌永祺科技发展有限公司 | Foundation pile bearing capacity detection medium exchanging and filing device |
| CN103410179A (en) * | 2013-08-23 | 2013-11-27 | 南昌永祺科技发展有限公司 | Center-penetrating annular foundation pile bearing capacity detection device |
| CN103422517A (en) * | 2013-08-23 | 2013-12-04 | 南昌永祺科技发展有限公司 | Stacked pile body self-counter-force balance load box |
| CN103410178B (en) * | 2013-08-23 | 2016-01-06 | 南昌永祺科技发展有限公司 | A kind of pile bearing capacity detects Medium Exchange filling device |
| CN103422517B (en) * | 2013-08-23 | 2016-02-10 | 南昌永祺科技发展有限公司 | Superposing type pile body self-rebound force balance loading case |
| CN103850276A (en) * | 2014-03-20 | 2014-06-11 | 南昌永祺科技发展有限公司 | Detecting and reloading technology for load box |
| CN105839678A (en) * | 2016-04-11 | 2016-08-10 | 湖北工业大学 | Improved pile foundation vertical bearing capacity test reverse self-balanced method and testing device |
| CN105839678B (en) * | 2016-04-11 | 2017-08-15 | 湖北工业大学 | A kind of modified vertical bearing capacity tests reverse self-balancing approach and experimental rig |
| CN108166546A (en) * | 2018-01-24 | 2018-06-15 | 中建三局第二建设工程有限责任公司 | A kind of device and construction method that pile foundation preloading is carried out using self-balancing static load |
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Open date: 20090520 |