CN205530393U - CFG stake single pile static test pile head protection device - Google Patents
CFG stake single pile static test pile head protection device Download PDFInfo
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- CN205530393U CN205530393U CN201620082614.3U CN201620082614U CN205530393U CN 205530393 U CN205530393 U CN 205530393U CN 201620082614 U CN201620082614 U CN 201620082614U CN 205530393 U CN205530393 U CN 205530393U
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Abstract
The utility model provides a CFG stake single pile static test pile head protection device, protection device sets up in CFG pile bolck portion, and this protection device is at least including a set of steel hoop, and each group's steel hoop all includes two half rounds ring sum screw rods, and two ends of each semicircle steel loop are equipped with the limit of bending, the edge of bending is equipped with the through -hole, the screw rod is worn to establish and form circular steel loop with two semicircle steel loop fixed connection in the through -hole. Adopt the utility model provides a stress of protection device from improving the pile bolck concrete, the portion adds the steel hoop at the pile bolck to make the concrete be in the three -dimensional stress, improve its compressive strength.
Description
Technical field
The utility model belongs to construction project field, is specifically related to a kind of CFG stake single-pile static loading test pile crown protection device.
Background technology
CFG stake is the abbreviation of English Cement Fly-ash Gravel, rubble, aggregate chips, sand, flyash mixed cement plus water mix and stir, the variable intensity stake with some strength made by various forming machinery.CFG stake is a kind of Low Intensity Concrete Piles, and the bearing capacity that can make full use of inter-pile soil acts on jointly, and can transmit load in deep foundation base, has preferable technical performance and economic effect.
Along with the enforcement of " building foundation treatment technical specification " (JGJ79-2012), CFG pile composite foundation bearing capacity acceptance test does not require nothing more than and carries out Bearing Capacity of Composite Foundation static test, also requirement and must carry out reinforcement single pile vertical resistance pressure bearing capacity static test.
Owing to urban land is the most nervous, the commercialization of 30 multilayers and civil buildings the most commonly used CFG pile composite foundation, the bearing capacity of single pile of CFG stake is more and more higher, and the CFG stake single pile vertical resistance pressure characteristic load bearing capacity of diameter 400mm usually reaches more than 100 ton, and CFG stake belongs to plain concrete pile.CFG stake single pile bearing capacity is big due to finder charge, and CFG stake top does not has arrangement of reinforcement, usually causes stake top concrete destruction in process of the test.
Always single pile compression dead load test the most successfully key link reinforced by the pile cover of single-pile vertical orientation static test, and deposited reinforced concrete pile is such, and the CFG stake of arrangement of reinforcement is not such yet；Conventional method is stake top concrete to carry out before static test arrangement of reinforcement do pile cover reinforcing, and pile cover concrete needs maintenance, time consuming；On the other hand, CFG stake single pile bearing capacity is big due to finder charge, and CFG stake top does not has arrangement of reinforcement, forming stress at static test pile top concrete and concentrate, if do not reinforced, usually can destroy.Pile cover concrete is after static test terminates, in addition it is also necessary to removes, has high labor costs；Pile cover armored concrete, as a temperature pier structure during static test, adds the cost of static test virtually.
Utility model content
In view of this; the purpose of this utility model is to overcome the deficiencies in the prior art; a kind of CFG stake single-pile static loading test pile crown protection device is provided; this apparatus structure is light and handy; can effectively solve the problem that during CFG stake single-pile static loading test, stake top concrete is damaged; and this device is easy for installation, reusable, reduce static test cost.
For achieving the above object; the utility model takes techniques below scheme: a kind of CFG stake single-pile static loading test pile crown protection device; described protection device is arranged on CFG stake top; this protection device at least includes one group of stirrup; each group of stirrup all includes two semicircle steel loops and screw rod; two ends of each semicircle steel loop are provided with bending edges, and described bending edges is provided with through hole, and described screw rod wears and two semicircle steel loops are fixedly connected to form circular steel loop in through-holes.
Preferably, each bending edges is provided with two through holes.
Preferably, described stirrup diameter is more than the stake footpath of CFG stake.
Preferably, described stirrup a diameter of 600mm, 500mm, 450mm, 410mm or 400mm.
Preferably, the low-carbon alloy steel that described stirrup uses material to be Q345B is made.
Preferably, the thickness of described stirrup is 5mm.
The utility model uses as above technical scheme, by screw rod, two semicircle steel loops is fixedly connected to form circular steel loop, and is arranged on described CFG stake top；Suffered by position, CFG stake single-pile static loading test pile top, axle power is maximum; and concrete is in axially without confined pressure stress; the stake top easy stress destruction of concrete; use the protection device that the utility model provides from the stress improving stake top concrete; at stake top plus stirrup; so that concrete is in triaxial stress state, improve its compression strength.
The protection device that the utility model provides has the further advantage that
1, technical feasibility, by increasing the stake top concrete confined pressure when axial compression resistance, thus improves the compression strength of stake top concrete.
2, easy for installation, stirrup uses two semicircle designs, devises the stirrup of respective diameters for different stake footpaths, as long as the CFG stake of corresponding different-diameter chooses corresponding stirrup, with nut screwing clamping during installation.
3, reusable, this stirrup installs before the test, unloads down and take good care of after having tested, and can re-use during test next time.
4, economical rationality, owing to stirrup is disposable input, can repeatedly use, thus very economical.
5, time-consuming, it is convenient that this device is installed, and can meet the purpose of static test, and the method doing pile cover reinforcing compared with tradition saves the plenty of time.
Accompanying drawing explanation
Fig. 1 is one of structural representation of the utility model CFG stake single-pile static loading test pile crown protection device；
Fig. 2 is the two of the structural representation of the utility model CFG stake single-pile static loading test pile crown protection device.
In figure: 1, semicircle steel loop；2, screw rod；3, bending edges；4, through hole.
Detailed description of the invention
With embodiment, the utility model is described in detail below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2; the present embodiment provides a kind of CFG stake single-pile static loading test pile crown protection device; described protection device is arranged on CFG stake top; this protection device at least includes one group of stirrup; each group of stirrup all includes two semicircle steel loops 1 and screw rod 2; two ends of each semicircle steel loop 1 are provided with bending edges 3, and described bending edges 3 is provided with through hole 4, and described screw rod 2 is located in through hole 4 and two semicircle steel loops 1 are fixedly connected to form circular steel loop.
Preferably, each bending edges 3 is provided with two through holes 4.Stirrup is made up of two semicircle steel loops 1 and four screw rods 2, selects corresponding some stirrups to be arranged on a top according to the size of stake top concrete stress state when static test and the diameter of stake.
The stake footpath of CFG stake is that 600mm, 500mm, 450mm, 410mm and 400mm etc. are several, size according to stake footpath processes the stirrup of different inner diameters respectively, the low-carbon alloy steel that stirrup uses material to be Q345B is made, the thickness of steel plate is 5mm, owing to the characteristic load bearing capacity of major diameter CFG stake is bigger, multiple tracks stirrup is down set along stake top at the trial, improves the compression strength of top, stake top concrete, it is ensured that be not destroyed during its pressurized.
Two half rounds 1 rings are fixedly connected to form circular steel loop by screw rod 2, and are arranged on described CFG stake top by the protection device provided in the present embodiment；Suffered by position, CFG stake single-pile static loading test pile top, axle power is maximum; and concrete is in axially without confined pressure stress; the stake top easy stress destruction of concrete; use this protection device from the stress improving stake top concrete; at stake top plus stirrup; so that concrete is in triaxial stress state, improve its compression strength.And this assembling device is the most convenient, technically reliable, with low cost, time-consuming, greatly improve benefit.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but in its shape or structure, make any change; every have same as the present application or akin technical scheme, within all falling within protection domain of the present utility model.
Claims (6)
1. a CFG stake single-pile static loading test pile crown protection device; it is characterized in that: described protection device is arranged on CFG stake top; this protection device at least includes one group of stirrup; each group of stirrup all includes two semicircle steel loops and screw rod; two ends of each semicircle steel loop are provided with bending edges; described bending edges is provided with through hole, and described screw rod wears and two semicircle steel loops are fixedly connected to form circular steel loop in through-holes.
CFG stake single-pile static loading test pile crown protection device the most according to claim 1, it is characterised in that: each bending edges is provided with two through holes.
CFG stake single-pile static loading test pile crown protection device the most according to claim 1, it is characterised in that: described stirrup diameter is more than the stake footpath of CFG stake.
CFG stake single-pile static loading test pile crown protection device the most according to claim 1, it is characterised in that: described stirrup a diameter of 600mm, 500mm, 450mm, 410mm or 400mm.
CFG stake single-pile static loading test pile crown protection device the most according to claim 1, it is characterised in that: the low-carbon alloy steel that described stirrup uses material to be Q345B is made.
CFG stake single-pile static loading test pile crown protection device the most according to claim 1, it is characterised in that: the thickness of described stirrup is 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620082614.3U CN205530393U (en) | 2016-01-28 | 2016-01-28 | CFG stake single pile static test pile head protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620082614.3U CN205530393U (en) | 2016-01-28 | 2016-01-28 | CFG stake single pile static test pile head protection device |
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| Publication Number | Publication Date |
|---|---|
| CN205530393U true CN205530393U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620082614.3U Active CN205530393U (en) | 2016-01-28 | 2016-01-28 | CFG stake single pile static test pile head protection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113110A (en) * | 2018-09-25 | 2019-01-01 | 福建省永正工程质量检测有限公司 | A kind of single pile bearing capacity detection device |
| CN114354389A (en) * | 2022-01-10 | 2022-04-15 | 广州建筑股份有限公司 | Side limiting device and method for shear test of contact surface of tubular pile and filler core |
-
2016
- 2016-01-28 CN CN201620082614.3U patent/CN205530393U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113110A (en) * | 2018-09-25 | 2019-01-01 | 福建省永正工程质量检测有限公司 | A kind of single pile bearing capacity detection device |
| CN114354389A (en) * | 2022-01-10 | 2022-04-15 | 广州建筑股份有限公司 | Side limiting device and method for shear test of contact surface of tubular pile and filler core |
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