CN210194710U - Hollow precast pile static load pulling resistance test structure - Google Patents
Hollow precast pile static load pulling resistance test structure Download PDFInfo
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- CN210194710U CN210194710U CN201921045849.5U CN201921045849U CN210194710U CN 210194710 U CN210194710 U CN 210194710U CN 201921045849 U CN201921045849 U CN 201921045849U CN 210194710 U CN210194710 U CN 210194710U
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Abstract
The utility model discloses a hollow precast pile static load resistance to plucking test structure. Comprises safety buttresses (7) arranged at two sides of a hollow precast pile (6), and steel beams (4) arranged on the two safety buttresses (7); threaded steel bars (5) are pre-embedded in the hollow precast piles (6), jacks (3) are arranged on the steel beams (4) at positions corresponding to the hollow piles (6), anchoring beams (2) are arranged on the jacks (3), and the upper ends of the threaded steel bars (5) are fixedly connected with the anchoring beams (2) through anchor heads (1). The utility model abandons the welding mode in the traditional test through the anchoring connection, saves time and labor, is simple and efficient, and avoids the problems which are easy to appear in the conventional test mode; can provide enough large counter force and completely meet the requirements of the static load uplift test of the hollow precast pile.
Description
Technical Field
The utility model relates to a single pile static load resistance to plucking test device specifically is a hollow precast pile static load resistance to plucking test structure.
Background
The hollow precast pile comprises the pile types such as a centrifugal prestressed reinforced concrete hollow precast pile, a precast reinforced concrete hollow square pile and a steel hollow precast pile, is widely applied to the field of modern foundation foundations such as pile foundations of industrial and civil building engineering, underground garages, civil air defense engineering and the like, and is convenient to manufacture, economical, practical, efficient, environment-friendly and convenient to construct.
To the construction of reaction frame among the hollow precast pile static load resistance to plucking test, especially concrete hollow precast pile, the single pile static load resistance to plucking test of prior art exists the defect mainly has three:
firstly, anchoring a prestressed cold-drawn wire on a steel plate, pouring concrete, and performing high-temperature steam maintenance to form the hollow precast pile, wherein the common method is to weld an anchor beam on a jack and a pile head steel plate end of the hollow precast pile by using a steel bar, and during a field test, no matter whether the welding is better, the pile and the pile head steel plate can be broken by cold-drawn wire when the load is at most 200 kN;
secondly, a pile head is hooped by a hoop, a hole is formed in the body of the hollow precast pile, an expansion screw is installed and connected with the hoop, then the anchor beam is welded with an anchor beam on a jack, the hoop or the screw is pulled off in the test, and the counter-force provided for the uplift test cannot be achieved;
and thirdly, punching a hole in a steel plate with the same size as the hollow precast pile head plate, screwing the hole with a bolt, connecting the pull rod with the anchor beam, testing without welding, and pulling the joint of the pile head plate and the cold-drawn wire open and disjointed when the maximum loading value generally does not reach the designed bearing capacity, so that the purpose of testing cannot be achieved.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned prior art exists, the utility model provides a hollow precast pile static load resistance to plucking test structure effectively solves current tester's confusion, does not need the welding to can provide enough big counter-force, satisfy hollow precast pile static load resistance to plucking experimental demand completely.
In order to achieve the purpose, the utility model provides a hollow precast pile static load uplift test structure, which comprises safety buttresses arranged at two sides of the hollow precast pile and steel beams arranged on the two safety buttresses;
threaded steel bars are pre-embedded in the hollow precast piles, jacks are arranged on the steel beams and correspond to the hollow precast piles, anchoring beams are arranged on the jacks, and the upper ends of the threaded steel bars are fixedly connected with the anchoring beams through anchor heads.
Further, the anchoring beam is a rectangular plate with two short sides symmetrically provided with U-shaped openings;
the upper end of the twisted steel bar penetrates through the U-shaped opening and is fixedly connected with the anchoring beam through the anchor head.
Furthermore, the threaded steel bars are secondary threaded steel with the diameter of 18-25mm, the number of the secondary threaded steel is 6-8, the length of the secondary threaded steel is 7-8m, the secondary threaded steel is tied into a steel bar cage, the steel bar cage is placed in a hollow precast pile hole, core filling concrete with the strength grade not lower than C40 is buried by about 4m, and the top of the hollow precast pile is exposed by 3 m.
Further, the anchoring beam is a steel plate of 500 × 680 × 50mm or 400 × 660 × 50 mm.
Compared with the prior art, the hollow precast pile static load uplift test structure has the following beneficial effects:
1. the structure is connected through anchoring, a welding mode in the traditional test is abandoned, time and labor are saved, simplicity and high efficiency are realized, and the problem which is easy to occur in the conventional test mode is avoided;
2. the anchoring connection mode of the structure can provide enough large counter force, and completely meets the requirements of the dead load uplift test of the hollow precast pile.
Drawings
Fig. 1 is a schematic view of the main structure of the present invention;
fig. 2 is a schematic structural view of a 500X680X50 mm anchoring beam according to the present invention;
fig. 3 is a schematic structural view of the anchoring beam of the present invention of 400X660X50 mm;
fig. 4 is a schematic view of the structure of the embedded steel bar of the hollow precast pile of the present invention;
in the figure: 1. anchor head, 2, anchor roof beam, 3, jack, 4, girder steel, 5, twisted steel, 6, hollow precast pile, 7, safe buttress, 8, U type opening.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 to 4, the dead load anti-pulling test structure of the hollow precast pile comprises safety buttresses 7 arranged at two sides of the hollow precast pile 6, and steel beams 4 arranged on the two safety buttresses 7;
threaded steel bars 5 are pre-buried in the hollow precast piles 6, jacks 3 are arranged on the steel beams 4 corresponding to the hollow precast piles 6, anchoring beams 2 are arranged on the jacks 3, and the upper ends of the threaded steel bars 5 are fixedly connected with the anchoring beams 2 through anchor heads 1.
Further, the anchoring beam 2 is a rectangular plate with two short sides symmetrically provided with U-shaped openings 8;
the upper end of the twisted steel 5 penetrates through the U-shaped opening 8 and is fixedly connected with the anchoring beam 2 through the anchor head 1. The twisted steel 5 is convenient to place and fix.
Further, the deformed steel bars 5 are secondary deformed steel bars with the diameter of 18-25mm, the number of the deformed steel bars is 6-8, the length of the deformed steel bars is 7-8m, the deformed steel bars are tied into a steel bar cage, hollow precast pile holes are placed, core filling concrete with the strength grade not lower than C40 is buried by about 4m, and the top 3m of the hollow precast pile 6 is exposed.
Further, the anchoring beam 2 has two types, which are 500 × 680 × 50mm or 400 × 660 × 50mm steel plates, respectively. And selecting the anchoring beams 2 of different models according to the specification requirements of the static load uplift tests of different hollow precast piles.
The dead load uplift test structure of the hollow precast pile is used for carrying out site reconnaissance before being built and replacing a site with the ground endurance of 60 tons/square meter. When in construction, a steel plate with the thickness of 500 multiplied by 680 multiplied by 50mm or 400 multiplied by 660 multiplied by 50mm is selected as the anchoring beam 2 in advance, and a U-shaped opening 8 is cut by a wire.
Placing the prepared steel beam 4 on a safety buttress 7 which is arranged in advance, placing a jack 3 on the steel beam 4, and placing an anchoring beam 2 on the jack 3; u type opening 8 on anchor roof beam 2 is worn to locate by pre-buried twisted steel 5's in hollow precast pile 6 upper end to through anchor head 1 and anchor roof beam 2 fastening connection, accomplish to this whole structure anchor, exert the effort to whole structure through jack 3, and then exert the counter-force to hollow precast pile 6, can realize carrying out the dead load resistance to plucking test to hollow precast pile.
Compared with the existing structure, no matter how firm the welding is, no matter how good the welding structure is, under very small pulling force, the hollow precast pile head anchoring steel bar is not broken, namely the bolt is broken, the pulling resistance bearing capacity of the hollow precast pile can not be tested at all, the structure effectively solves the confusion of current testers, and through the tests of a plurality of construction sites, the structure completely meets the requirements of the dead load pulling resistance test of the hollow precast pile.
In conclusion, the hollow precast pile static load uplift test structure is connected through anchoring, a welding mode in the traditional test is abandoned, time and labor are saved, simplicity and high efficiency are realized, and the problem which is easy to occur in the conventional test mode is avoided; can provide enough large counter force and completely meet the requirements of the static load uplift test of the hollow precast pile.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A dead load anti-pulling test structure of a hollow precast pile is characterized in that,
comprises safety buttresses (7) arranged at two sides of a hollow precast pile (6), and steel beams (4) arranged on the two safety buttresses (7);
threaded steel bars (5) are pre-buried in the hollow precast piles (6), jacks (3) are placed on the steel beams (4) at positions corresponding to the hollow precast piles (6), anchoring beams (2) are placed on the jacks (3), and the upper ends of the threaded steel bars (5) are fixedly connected with the anchoring beams (2) through anchor heads (1).
2. The dead load and uplift test structure of the hollow precast pile as claimed in claim 1,
the anchoring beam (2) is a rectangular plate with two short sides symmetrically provided with U-shaped openings (8);
the upper end of the twisted steel bar (5) penetrates through the U-shaped opening (8) and is fixedly connected with the anchoring beam (2) through the anchor head (1).
3. The dead load and pull-out resistance test structure of hollow precast pile according to claim 1 or 2,
the deformed steel bars (5) are secondary deformed steel bars with the diameter of 18-25mm, the number of the deformed steel bars is 6-8, the deformed steel bars are tied into a steel bar cage, and the deformed steel bars and the hollow precast pile (6) are buried by filling concrete with the strength grade not lower than C40 for 4m, and the top of the hollow precast pile (6) is exposed for 3 m.
4. The dead load and pull-out resistance test structure of hollow precast pile according to claim 1 or 2,
the anchoring beam (2) is a steel plate with the thickness of 500 multiplied by 680 multiplied by 50mm or 400 multiplied by 660 multiplied by 50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045849.5U CN210194710U (en) | 2019-07-05 | 2019-07-05 | Hollow precast pile static load pulling resistance test structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045849.5U CN210194710U (en) | 2019-07-05 | 2019-07-05 | Hollow precast pile static load pulling resistance test structure |
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| Publication Number | Publication Date |
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| CN210194710U true CN210194710U (en) | 2020-03-27 |
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| CN201921045849.5U Active CN210194710U (en) | 2019-07-05 | 2019-07-05 | Hollow precast pile static load pulling resistance test structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302063A (en) * | 2020-10-29 | 2021-02-02 | 上海勘察设计研究院(集团)有限公司 | Twisted steel anchoring device and mounting method |
| CN113529818A (en) * | 2021-07-13 | 2021-10-22 | 深圳市工勘岩土集团有限公司 | Welding-free anti-pulling static load test device for prestressed pipe pile |
| CN113529817A (en) * | 2021-07-13 | 2021-10-22 | 深圳市工勘岩土集团有限公司 | Welding-free anti-pulling static load test method for prestressed pipe pile |
| CN113585363A (en) * | 2021-07-13 | 2021-11-02 | 深圳市工勘岩土集团有限公司 | Connecting and fixing structure for core-filling steel bars of reaction steel disc and prestressed pipe pile |
-
2019
- 2019-07-05 CN CN201921045849.5U patent/CN210194710U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302063A (en) * | 2020-10-29 | 2021-02-02 | 上海勘察设计研究院(集团)有限公司 | Twisted steel anchoring device and mounting method |
| CN113529818A (en) * | 2021-07-13 | 2021-10-22 | 深圳市工勘岩土集团有限公司 | Welding-free anti-pulling static load test device for prestressed pipe pile |
| CN113529817A (en) * | 2021-07-13 | 2021-10-22 | 深圳市工勘岩土集团有限公司 | Welding-free anti-pulling static load test method for prestressed pipe pile |
| CN113585363A (en) * | 2021-07-13 | 2021-11-02 | 深圳市工勘岩土集团有限公司 | Connecting and fixing structure for core-filling steel bars of reaction steel disc and prestressed pipe pile |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 6, Chengjiang Road, Yunlong District, Xuzhou City, Jiangsu Province 221000 Patentee after: China National Testing and Testing Holding Group Xuzhou Co.,Ltd. Address before: 221000 1-101, building 52 (original w18), qinshuiwan Commercial Plaza, Yunlong District, Xuzhou City, Jiangsu Province Patentee before: China Building Material Test and Certification Group Co.,Ltd. |
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| CP03 | Change of name, title or address |