CN210263168U - Vertical resistance to plucking static test device of concrete pipe pile single pile - Google Patents
Vertical resistance to plucking static test device of concrete pipe pile single pile Download PDFInfo
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- CN210263168U CN210263168U CN201920744983.8U CN201920744983U CN210263168U CN 210263168 U CN210263168 U CN 210263168U CN 201920744983 U CN201920744983 U CN 201920744983U CN 210263168 U CN210263168 U CN 210263168U
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Abstract
The utility model discloses a vertical anti-pulling static load test device for a single concrete pipe pile, which comprises a tension loading system and a loading bracket connected with the pipe pile; the loading support comprises a left web plate, a right web plate and a top plate, the left web plate and the right web plate are arranged in parallel along the vertical direction and are fixedly connected into a whole through the top plate, and the bottoms of the left web plate and the right web plate are respectively fixedly welded with the upper surface of a metal end plate at the top of the tubular pile; the tension loading system comprises a steel beam and jacking equipment, the steel beam penetrates through the left web plate and the right web plate, the two end parts of the steel beam are supported and fixed, and the jacking equipment is arranged between the steel beam and the top plate. The utility model provides a pair of vertical resistance to plucking static load test device of concrete pipe pile single pile has solved the problem that current tubular pile resistance to plucking detects that the time limit for a project is longer, can not repeated the detection, has convenient operation, factor of safety height, does not influence construction period's advantage, can extensively popularize and apply in building tubular pile work progress.
Description
Technical Field
The utility model belongs to the tubular pile construction detects the technique, concretely relates to vertical resistance to plucking static load test device of concrete pipe pile list pile.
Background
The detection result of the single-pile vertical uplift static load test is an important basis for determining construction quality, the existing method for detecting the single-pile vertical uplift static load test adopts an anchor pile method, an anchor cage connected with a test pile in a steel bar welding mode forms a loading counter-force system through an anchor pile for providing support counter-force, and the detection device has the following two defects:
1. the pretensioned prestressed concrete pipe pile is not provided with exposed steel bars, and a pile head is poured after a steel reinforcement cage is installed, so that the original appearance of the test pile is changed, the test can be carried out only after the concrete strength of the pile head reaches the designed strength (generally 28 days), and the required construction period is long;
2. reinforcing bar tensile strength is not high, easy atress is uneven during the steel reinforcement cage stretch-draw of installation, cause the reinforcing bar fracture, factor of safety is low, easily produce the production accident of hindering the people, anchor reinforcing bar and upper portion anchor cage disalignment, must with reinforcing bar preflex, because the preflex produces the moment of torsion in joint department, this concrete of department has the phenomenon of being crushed in advance in the concrete member test, and the operation is inconvenient, easily cause and detect the failure, this test pile can't detect once more after detecting the failure, and the original appearance of test pile has been changed, influence one process implementation under the pretension method prestressed concrete tubular pile.
Disclosure of Invention
The technical problem solved by the invention is as follows: the vertical pulling-resistant static load test device for the single pile of the concrete pipe pile is provided for solving the problems of low safety coefficient, long required construction period and inconvenient operation existing in the tensile detection of the existing pretensioned prestressed concrete pipe pile.
The invention is realized by adopting the following technical scheme:
a vertical anti-pulling static load test device for a single concrete pipe pile comprises a tension loading system and a loading support connected with the pipe pile;
the loading support comprises a left web plate, a right web plate and a top plate, the left web plate and the right web plate are arranged in parallel along the vertical direction and are fixedly connected into a whole through the top plate, and the bottoms of the left web plate and the right web plate are respectively fixedly welded with the upper surface of a metal end plate at the top of the tubular pile;
the tension loading system comprises a steel beam and jacking equipment, the steel beam penetrates through the left web plate and the right web plate, the two end parts of the steel beam are supported and fixed, and the jacking equipment is arranged between the steel beam and the top plate.
Furthermore, the axis of the relative tubular pile in bottom of left web and right web and the metal end plate upper surface symmetry welding at tubular pile top.
Furthermore, rib feet are welded at the joint included angles of the left web plate and the right web plate and the upper surface of the metal end plate at the top of the tubular pile respectively.
Furthermore, the top of the left web plate and the top of the right web plate exceed the upper surface of the top plate, and a plurality of top ribs are uniformly welded at the joint included angles between the left web plate and the top plate and between the right web plate and the upper surface of the top plate respectively.
The utility model discloses an among the vertical resistance to plucking static load test device of concrete tubular pile single pile, the both ends of girder steel set up through two sets of supporting cushion block supports.
Further, the jacking equipment is a hydraulic jack.
Compared with the prior art, the utility model discloses a vertical resistance to plucking static load test device of concrete tubular pile single pile's beneficial effect as follows:
1. left web in the loading support, right web, the roof, the top rib, the end plate of rib foot and tubular pile is steel, it is more firm reliable with kind of material welding, the steel sheet of loading support itself has certain intensity and rigidity, the bearing capacity is great, the ductility is less, usable it bears great load, the difficult emergence of loading structure destroys, loading testing process is safer, need not ligature reinforced bar pile head again and pour concrete, construction process is few, can detect immediately after the loading support welding has cooled (4 hours), required time limit for a project is short, tensile strength is high, and convenient operation.
2. Web and the coaxial no moment of torsion of tubular pile in the loading support, evenly set up the node that the pulling force of top rib assurance jack can evenly transmit the tubular pile between roof and the web, prevent that roof and web from taking place local deformation, the rib foot of web bottom has both increased the welding seam area, the tensile strength of web has also been increased, still transmit the reliable transmission of pulling force to the test pile simultaneously, easy operation detects still can continue repeated detection with the welding of loading support after the failure, can not change the original appearance of pretension method prestressed concrete tubular pile, detect the welding seam cutting between the web bottom of accomplishing the loading support and the tubular pile end plate, do not influence tubular pile exterior structure, it has no influence to next construction process of tubular pile.
To sum up, the utility model provides a pair of vertical resistance to plucking static load test device of concrete pipe pile single pile has solved the problem that the time limit for a project is longer, can not repeated the detection that current tubular pile resistance to plucking detected the existence, has convenient operation, factor of safety height, does not influence construction period's advantage, can extensively popularize and apply in building tubular pile work progress.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
Fig. 1 is a schematic view of the overall structure of a vertical anti-pulling static load test device for a single concrete pipe pile in an embodiment.
Fig. 2 is a schematic structural view of a loading support in an embodiment.
Reference numbers in the figures: 1-tubular pile, 11-tubular pile end plate, 21-left web, 22-right web, 23-top plate, 24-rib foot, 25-top rib, 3-steel beam, 4-jack and 5-supporting cushion block.
Detailed Description
Examples
Referring to fig. 1, the vertical resistance to plucking static load test device of a concrete tubular pile single pile in the figure does the utility model discloses a specific embodiment, including pulling force loading system and with the loading support, pulling force that the pulling force loading system applyed the tubular pile and drawn, the loading support is through transmitting this pulling force to the tubular pile 1 of construction from pulling force loading system.
Specifically, the loading bracket includes a left web 21, a right web 22, a top plate 23, a rib foot 24, and a top rib 25. Left web 21 and right web 22 are along the vertical direction parallel arrangement with tubular pile 1 axis place, and roof 23 sets up in the position that left web 21 and right web 22 are close to the top, and roof 23 both ends and left web 21 and right web 22 welded fastening form the overall structure of loading support. When the anti-pulling test is carried out, the bottoms of the left web plate 21 and the right web plate 22 of the loading support are respectively welded and fixed with the upper surface of the tubular pile end plate 11 at the top of the tubular pile 1. The tubular pile end plate 11 is a metal disc steel plate fixedly welded at the end part of the prefabricated tubular pile and the inner main rib.
In order to ensure that the loading support applies an acting force in the coaxial direction to the whole tubular pile 1, the bottoms of the left web 21 and the right web 22 are symmetrically welded with the upper surface of the tubular pile end plate 11 relative to the axis of the tubular pile 1, that is, the left web 21 and the right web 22 are symmetrically arranged relative to the extension line of the axis of the tubular pile 1, and the combined pulling force of the left web 21 and the right web 22 to the tubular pile 1 is upward along the axis of the tubular pile 1.
The tension loading system comprises a steel beam 3 and jacking equipment, the steel beam 3 penetrates between a left web plate 21 and a right web plate 22 of a fixed loading support from the horizontal direction, two ends of the steel beam 3 are supported by supporting cushion blocks 5 respectively, the whole steel beam 3 is supported and fixed in the horizontal direction, the supporting height of the steel beam 3 is located between a tubular pile end plate 11 and a top plate 23, the jacking equipment is arranged on the steel beam 3 and is in contact with the lower surface of the top plate through jacking, the jacking force of the jacking equipment acts on the top plate 23, the whole loading support is transmitted to a tubular pile 1, and upward tension of the tubular pile 1 is formed. The steel beam 3 penetrates through the space between the left web plate 21 and the right web plate 22, and plays a limiting role in the steel beam and jacking equipment while serving as a force transmission structure of the loading support.
In practical application, hydraulic jacks 4 with different loads can be selected as jacking equipment according to the pulling resistance requirements of the tubular pile.
Since the top plate 23 receives the upward lifting force of the jacking device and then transmits the lifting force to the left and right webs 21 and 22 at both ends, in order to ensure that the top plate 23 does not deform completely, the thickness of the top plate 23 is greater than the thickness of the left and right webs 21 and 22. In order to further ensure that the acting force of the jacking equipment can be uniformly transmitted to the node of the tubular pile 1 and prevent the top plate 23 from being locally deformed, in the embodiment, the tops of the left web plate 21 and the right web plate 22 exceed the upper surface of the top plate 23, a plurality of right-angled triangular top ribs 25 are uniformly welded at the intersection included angles between the left web plate 21 and the right web plate 22 and the upper surface of the top plate 23, and the number of the top ribs between the left web plate 21 and the top plate 23 is the same as that between the right web plate 22 and the top plate 23. In order to increase the welding seam area between the bottoms of the left web plate 21 and the right web plate 22 and the tubular pile end plate 11, right-angled triangular rib feet 24 are welded at the joint included angles between the left web plate 21 and the right web plate 22 and the upper surface of the tubular pile end plate 11 respectively, so that the contact area between the loading support and the tubular pile is increased, the tensile capacity of the web plates is also increased, and meanwhile, the tensile force is reliably transmitted to a test pile.
The following describes in detail the process of the tensile test of the tube pile using the loading device of this embodiment. In this embodiment, the left web 21, the right web 22, the rib feet 24 and the top rib 25 are made of steel plates with a thickness of 20mm, the top 23 is made of steel plates with a thickness of 40mm, the rib feet 24 and the tubular pile end plate 11 are welded by double-sided groove welding, and the height of the welding line is not less than 10 mm.
After the loading support is welded and fixed, a steel beam 3 penetrates through a space between a left web plate 21 and a right web plate 22, the steel beam 3 is horizontally supported and fixed through two groups of supporting cushion blocks 5, a hydraulic jack 4 is placed on the steel beam 3 between the left web plate 21 and the right web plate 22 to serve as jacking equipment, a top plate 23 of the loading support is jacked upwards through the hydraulic jack 4 in a grading loading mode, the elevation change of the top of a test pile is measured through external measuring equipment, the uplift deformation of the test pipe pile is obtained, after relevant test detection is completed through analysis of required data, the loading support is removed through oxygen cutting along the welding line between the bottom of the loading support and a pipe pile end plate, then the loading support is welded to the next pipe pile to be detected in a turnover mode, and vertical uplift detection of a single pile of the continuous concrete pipe pile is performed.
The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a vertical resistance to plucking static test device of concrete pipe pile single pile which characterized in that: the device comprises a tension loading system and a loading bracket connected with a tubular pile;
the loading support comprises a left web plate, a right web plate and a top plate, the left web plate and the right web plate are arranged in parallel along the vertical direction and are fixedly connected into a whole through the top plate, and the bottoms of the left web plate and the right web plate are respectively fixedly welded with the upper surface of a metal end plate at the top of the tubular pile;
the tension loading system comprises a steel beam and jacking equipment, the steel beam penetrates through the left web plate and the right web plate, the two end parts of the steel beam are supported and fixed, and the jacking equipment is arranged between the steel beam and the top plate.
2. The vertical anti-pulling static load test device for the single concrete pipe pile according to claim 1, characterized in that: the axis of the relative tubular pile in bottom of left web and right web welds with the metal end plate upper surface symmetry at tubular pile top.
3. The vertical anti-pulling static load test device for the single concrete pipe pile according to claim 2, is characterized in that: and rib feet are welded at the joint included angle between the left web plate and the right web plate and the upper surface of the metal end plate at the top of the tubular pile respectively.
4. The vertical anti-pulling static load test device for the single concrete pipe pile according to claim 3, is characterized in that: the top of the left web and the top of the right web exceed the upper surface of the top plate, and a plurality of top ribs are uniformly welded at the joint included angles of the left web and the right web and the upper surface of the top plate respectively.
5. The vertical pulling-resistant static load test device for the single concrete pipe pile according to any one of claims 1 to 4, wherein: and two ends of the steel beam are supported by two groups of supporting cushion blocks.
6. The vertical anti-pulling static load test device for the single concrete pipe pile according to claim 5, is characterized in that: the jacking equipment is a hydraulic jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920744983.8U CN210263168U (en) | 2019-05-23 | 2019-05-23 | Vertical resistance to plucking static test device of concrete pipe pile single pile |
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| CN201920744983.8U CN210263168U (en) | 2019-05-23 | 2019-05-23 | Vertical resistance to plucking static test device of concrete pipe pile single pile |
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| CN210263168U true CN210263168U (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764445A (en) * | 2020-07-03 | 2020-10-13 | 浙江大港桥梁科学研究有限公司 | Counterforce device for pile foundation uplift static load test |
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2019
- 2019-05-23 CN CN201920744983.8U patent/CN210263168U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764445A (en) * | 2020-07-03 | 2020-10-13 | 浙江大港桥梁科学研究有限公司 | Counterforce device for pile foundation uplift static load test |
| CN111764445B (en) * | 2020-07-03 | 2021-09-03 | 浙江大港桥梁科学研究有限公司 | Counterforce device for pile foundation uplift static load test |
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