CN201258494Y - Loading unit for single-pile vertical anti-pulling static load test - Google Patents
Loading unit for single-pile vertical anti-pulling static load test Download PDFInfo
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- CN201258494Y CN201258494Y CNU2008200542378U CN200820054237U CN201258494Y CN 201258494 Y CN201258494 Y CN 201258494Y CN U2008200542378 U CNU2008200542378 U CN U2008200542378U CN 200820054237 U CN200820054237 U CN 200820054237U CN 201258494 Y CN201258494 Y CN 201258494Y
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Abstract
The utility model relates to a load device of a single-pile vertical anti-lifting static test, which is used for a pile-column test to buildings. The load device is provided with a counter-force beam (1), the two ends of which are respectively arranged on pedestal piles (2, 3); a jack (4) is arranged on the counter-force beam (1); the upper end of a threaded rod (6) passing through the counter-force beam (1) and the jack (4) is connected with the top of the jack (4) through a fastening piece (5); and the lower end of the threaded rod (6) is connected with a steel plate (7) through the fastening piece, wherein, the steel plate is arranged above a test pile (8) when in testing and is connected with a reinforcing rod (9) at the top of the test pile (8). The load device has clear force transferring path, the reinforcing rod on the test pile is forced evenly, and the anti-lifting detection accuracy of a foundation pile. Furthermore, the load device has simple operating technology, wide adaptable scope and strong practicability.
Description
Technical field
The utility model relates to building field, is single-pile vertical orientation resistance to plucking static loading test charger.
Background technology
Along with producing and science and technology development day by day, the situation that uplift force is born on the basis of building is more and more many, and uplift pile is used widely.And utilize pile foundation that uplift resistance is provided is form comparatively commonly used, thisly is subjected to the stake of pull out force to be called uplift pile.
Some studies show that the influence factor of an anti-pulling capacity mainly contains: 1. Zhuan type and job practices, 2. Zhuan physical dimension, the 3. classification of foundation soil, 4. the formation history of soil layer, 5. Zhuan loading history, 6. characteristic of load etc.On qualitative, everyly cause what all native internal stresss of stake changed, all will exert an influence to the anti-pulling capacity of stake.
Stipulate among China's " technical code for building pile foundation " JGJ94: for the one-level buildings pile, the anti-pulling capacity standard value of single pile should be determined by pulling out quiet lotus test on the on-the-spot single pile; For two, three grades of buildings piles, as do not have local experience, can by formula calculate.Therefore, the quiet lotus test of the resistance to plucking of single pile is the important tests of determining single pile anti-pulling capacity standard value and detecting the single pile uplift resistance, has great importance.Stipulate among China's " architecture foundation pile inspection specifications " JGJ106: the test counterforce device should adopt counter-force stake (or engineering piles) that end reaction is provided, and also can adopt natural ground that end reaction is provided according to field condition.The reaction frame system should have 1.2 times safety factor and meet: (1) adopts counter-force stake (or engineering piles) when end reaction is provided, and counter-force stake end face is answered smooth and had certain intensity; When (2) adopting natural ground that counter-force is provided, the compressive stress that puts on ground should not surpass 1.5 times of characteristic value of foundation bearing capacity; The fulcrum center of gravity of reaction beam should overlap with the bearing center.
But above-mentioned " architecture foundation pile inspection specifications " do not provide the apparatus structure that carries out correlation test, is not suitable for practical device at present yet and occurs.
The utility model content
The technical problems to be solved in the utility model is, the deficiency at prior art exists designs a kind of single-pile vertical orientation resistance to plucking static loading test charger, and its Path of Force Transfer is clear, and reinforcing steel bar bear is even on the test pile, can fully guarantee the accuracy that the foundation pile resistance to plucking detects; The plant operator skill is simple, and wide accommodation is practical.
The technical solution of the utility model is, described single-pile vertical orientation resistance to plucking static loading test charger has two ends to place reaction beam in the bearing stake respectively, its design feature is, described reaction beam is provided with jack, the upper end of the screw rod by described reaction beam and jack is connected through the top of securing member with jack, and the lower end of described screw rod is same to be placed the test pile top when detecting and link to each other with the steel plate that this test pile top rebars connects.
Below the utility model made further specify.
Referring to Fig. 1, single-pile vertical orientation resistance to plucking static loading test charger of the present utility model has two ends to place reaction beam 1 in the bearing stake 2,3 respectively, its design feature is, described reaction beam 1 is provided with jack 4, the upper end of the screw rod 6 by described reaction beam 1 and jack 4 is connected through the top of securing member 5 with jack 4, and the lower end of described screw rod 6 places test pile 8 tops when detecting with securing member is same and the steel plate 7 that connects with these test pile 8 top rebars 9 links to each other.
As shown in Figure 2, have a plurality of reinforced holes 11 corresponding to reinforcing bar 9 on the test pile 8 on the described steel plate 7, every reinforcing bar 9 passes corresponding reinforced hole 11 and in the ground tackle anchoring of steel plate 7 end faces; Steel plate 7 middle parts are provided with the screw rod connecting hole 12 of connecting screw rod 6.Ground tackle can adopt the product of prior art.
Described reaction beam 1 can be with Fig. 3 to hollow i beam shown in Figure 5.
Operating principle of the present utility model is, during test, the reinforcing bar 9 usefulness ground tackles 10 on the test pile 8 are anchored on the steel plate 7 of design, draws screw rod 6 by reaction beam 1 and jack 4 from steel plate 7, screw rod 6 upper ends with fixed by nut on jack 4.During jack 4 application of forces, reaction beam 1 is fixing, and screw rod 6 upper ends are also fixing, thereby power is delivered to steel plate 7, and are delivered on the reinforcing bar 9 by steel plate 7, and uplift resistance is provided.
Before pile pulling test, to tackle cast-in-place concrete pile and have the preformed pile of joint to adopt low Strain Method to check pile quality, purpose is to prevent to influence the resistance to plucking result of the test because of test pile sole mass problem.For ease of the settlement measurement instrument is installed, test pile 8 tops should exceed the ground of testing pits; For making the test pile stress condition identical with design condition, the ground of testing pits should be consistent with absolute altitude at the bottom of the cushion cap.Check and accept detection for engineering piles, when the shaft load level is low, allow to adopt cement mortar that floating simple pile crown processing method is pushed up in stake.
Stipulate among China's " architecture foundation pile inspection specifications " JGJ106-2003: the test counterforce device should adopt counter-force stake (or engineering piles) that end reaction is provided, and also can adopt natural ground that end reaction is provided according to field condition.When adopting natural ground to make counter-force, the foundation strength at both sides bearing place should be close, and the contact area on both sides bearing and ground should be identical, avoids that both sides sedimentation inequality causes the test pile eccentric tension in the loading procedure.For guaranteeing the stability of reaction beam, should notice that counter-force stake end face diameter (or length of side) is not less than the deck-siding of reaction beam.
When setting up reaction beam 1, guarantee the stable of reaction beam, make reaction beam on same horizontal plane, avoid test pile eccentric tension in the loading procedure.
According to the reinforcement placement of test pile 8, select the steel plate 7 that is provided with corresponding reinforcing bar pore size distribution for use; Make the reinforcing bar on the test pile 8 just pass steel plate after vertically, and can be anchored on the steel plate, guarantee that the reinforcing bar on the test pile is all evenly stressed.
The uplift pile experiment loading unit should adopt hydraulic jack, and the reply jack is examined and determine before the test, guarantees the jack operate as normal.Jack is placed in above the reaction beam during because of pile pulling test, should take certain safety measure, prevents that jack from toppling over or other contingencies take place.Eccentric for preventing to load, jack make a concerted effort the center should with center of gravity, the stake dead in line of counterforce device, and guarantee that resultant direction is vertical.
During practical operation, screw rod 6 should be passed from top to bottom jack 4, reaction beam 1, on steel plate 7, the upper end is fixed on the top of jack 4 with fixed by nut in the lower end.Adjust the position of steel plate 7 and jack 4, guarantee screw rod 6 in the vertical directions, avoid the screw rod eccentric tension, thereby make test pile off-centre, influence test result.
As known from the above, the utility model is a kind of single-pile vertical orientation resistance to plucking static loading test charger, and this 3.2 plant operator skill is simple, used steel plate can carry out autonomous Design according to different test pile arrangements of reinforcement, screw rod can be regulated according to the aperture size of jack, and wide adaptability is practical; Reinforcing bar on the test pile all is anchored on the steel plate, and all reinforcing bars are stressed together, stressed evenly, only effectively avoided stressed and cause reinforcement yielding with main muscle; By steel plate, effectively changed force structure, avoid traditional structure that the reinforcing bar on the test pile is held together, the situation of discontinuity; The device Path of Force Transfer is clear, and it is accurate to detect data, has fully guaranteed the accuracy that the foundation pile resistance to plucking detects.
Description of drawings
Fig. 1 is a kind of example structure schematic diagram of the utility model device;
Fig. 2 is a kind of example structure schematic diagram of steel plate shown in Figure 1;
Fig. 3 is a kind of example structure master's TV structure schematic diagram of reaction beam shown in Figure 1;
Fig. 4 is the plan structure schematic diagram of reaction beam shown in Figure 3;
Fig. 5 is that the left side of reaction beam shown in Figure 3 is looked or right TV structure schematic diagram.
In the drawings:
1-reaction beam, 2, the stake of 3-bearing, 4-jack,
5-securing member, 6-screw rod, 7-steel plate,
8-test pile, 9-reinforcing bar, 10-ground tackle,
11-reinforced hole, 12-screw rod connecting hole.
The specific embodiment
As shown in Figure 1, single-pile vertical orientation resistance to plucking static loading test charger of the present utility model has two ends to place reaction beam 1 in the bearing stake 2,3 respectively, described reaction beam 1 is provided with jack 4, the upper end of the screw rod 6 by described reaction beam 1 and jack 4 is connected with the top of pad with jack 4 through the nut as securing member 5, and the lower end of described screw rod 6 places test pile 8 tops and continuous with the steel plate 7 of these test pile 8 top rebars 9 connections when detecting with nut is same.
As shown in Figure 2, have a plurality of reinforced holes 11 on the described steel plate 7 corresponding to reinforcing bar 9 on the test pile 8, every reinforcing bar 9 pass corresponding reinforced hole 11 and in steel plate 7 end faces with ground tackle 10 anchorings; Steel plate 7 middle parts are provided with the screw rod connecting hole 12 of connecting screw rod 6.
Claims (3)
1, a kind of single-pile vertical orientation resistance to plucking static loading test charger, there are two ends to place reaction beam (1) in the bearing stake (2,3) respectively, it is characterized in that, described reaction beam (1) is provided with jack (4), the upper end of the screw rod (6) by described reaction beam (1) and jack (4) is connected through the top of the same jack of securing member (5) (4), and the lower end of described screw rod (6) places test pile (8) top when detecting with securing member is same and links to each other with the steel plate (7) that this test pile (8) top rebars (9) connects.
2, according to the described single-pile vertical orientation resistance to plucking of claim 1 static loading test charger, it is characterized in that, have a plurality of reinforced holes (11) of going up reinforcing bar (9) corresponding to test pile (8) on the described steel plate (7), steel plate (7) middle part is provided with the screw rod connecting hole (12) of connecting screw rod (6).
3, according to the described single-pile vertical orientation resistance to plucking of claim 1 static loading test charger, it is characterized in that described reaction beam (1) is hollow i beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200542378U CN201258494Y (en) | 2008-08-27 | 2008-08-27 | Loading unit for single-pile vertical anti-pulling static load test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200542378U CN201258494Y (en) | 2008-08-27 | 2008-08-27 | Loading unit for single-pile vertical anti-pulling static load test |
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| CN201258494Y true CN201258494Y (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200542378U Expired - Fee Related CN201258494Y (en) | 2008-08-27 | 2008-08-27 | Loading unit for single-pile vertical anti-pulling static load test |
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| CN101831925A (en) * | 2010-06-01 | 2010-09-15 | 张百全 | Detection method for static load of pile foundation |
| CN101985839A (en) * | 2010-11-19 | 2011-03-16 | 云南省建筑科学研究院 | Large tonnage pile static loading test ballasting platform counter-force device and mounting method thereof |
| CN102134862A (en) * | 2011-04-14 | 2011-07-27 | 潘明惠 | Multipoint up-pull loading beam |
| CN102134859A (en) * | 2010-01-25 | 2011-07-27 | 常州市建筑科学研究院有限公司 | Uplift resistance test device for pre-stressed pipe pile |
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| CN102839692A (en) * | 2012-09-14 | 2012-12-26 | 中建一局集团第五建筑有限公司 | Combined tool for anti-pulling test of raft anti-floating anchor and test method |
| CN102944480A (en) * | 2012-12-07 | 2013-02-27 | 中国石油集团工程设计有限责任公司 | Device and method for testing uplift bearing capacity of buried pipeline |
| CN103031860A (en) * | 2012-12-14 | 2013-04-10 | 广东省建筑科学研究院 | Pipe pile vertical static load testing connection device, and testing system and method using same |
| CN103046585A (en) * | 2013-01-28 | 2013-04-17 | 中国水电顾问集团西北勘测设计研究院 | Method for testing horizontal force bearing capacity static load of foundation single pile of wind power plant fan |
| AU2012101235B4 (en) * | 2012-08-14 | 2013-04-18 | Patented Foundations Pty Ltd | Rapid load capacity test |
| CN103114612A (en) * | 2011-11-16 | 2013-05-22 | 中石油东北炼化工程有限公司吉林设计院 | Single pile vertical uplift static loading testing device |
| CN103542971A (en) * | 2013-10-28 | 2014-01-29 | 中国建筑第七工程局有限公司 | Simple device for detecting pulling resistance |
| CN103924623A (en) * | 2013-01-11 | 2014-07-16 | 武汉倡文科技咨询有限公司 | Main reinforcement distribution ring for uplifting of foundation pile |
| CN103953078A (en) * | 2014-05-16 | 2014-07-30 | 安徽省建筑工程质量监督检测站 | Tubular pile pull-out test device with single dowel bar structure |
| CN104514231A (en) * | 2013-09-29 | 2015-04-15 | 武汉倡文科技咨询有限公司 | Jack-embedded type static testing girder |
| CN104807622A (en) * | 2015-04-22 | 2015-07-29 | 中国十七冶集团有限公司 | Testing method for checking bearing force of cover beam hoop |
| CN105256846A (en) * | 2015-10-14 | 2016-01-20 | 常州华厦建设工程质量检测有限公司 | Connecting device special for single-pile vertical pulling test |
| CN105625486A (en) * | 2016-02-26 | 2016-06-01 | 福建省新能海上风电研发中心有限公司 | Sea foundation pile anti-drawing testing device and testing method thereof |
| CN106939622A (en) * | 2017-03-30 | 2017-07-11 | 上海理工大学 | Influence development test device of the enlarged footing spacing to base expanding and base expanding resistance to plucking pile bearing capacity |
| CN107059955A (en) * | 2017-04-05 | 2017-08-18 | 河南科技大学 | A kind of fixation and loading system for being used to simulate preferable single pile response |
| AU2013213724B2 (en) * | 2012-08-14 | 2018-01-18 | Patented Foundations Pty Ltd | Rapid load capacity test |
| CN107975075A (en) * | 2017-11-08 | 2018-05-01 | 浙江理工大学 | A kind of construction technology for existing load-bearing engineering pile detection structural measure |
| CN108018890A (en) * | 2018-01-23 | 2018-05-11 | 安徽省（水利部淮河水利委员会）水利科学研究院（安徽省水利工程质量检测中心站） | A kind of anchor pole pullout tests system |
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2008
- 2008-08-27 CN CNU2008200542378U patent/CN201258494Y/en not_active Expired - Fee Related
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| CN109667293A (en) * | 2019-01-21 | 2019-04-23 | 南京市建筑安装工程质量检测中心 | The anchor connection method anti-pulling device of unit for single-pile vertical anti-pulling static test |
| CN111705854A (en) * | 2020-07-24 | 2020-09-25 | 陈崇凯 | Uplift construction method for foundation pile by large-diameter high-strength special type stabilized steel bar anchoring connection method |
| 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 |
| CN113431104A (en) * | 2021-07-13 | 2021-09-24 | 中南大学 | Single-pile static load test device and method for providing counter force by combining pile group and bearing platform |
| 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 |
| 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 |
| 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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