CN103485374A - Static load test anchor pile connecting structure - Google Patents

Static load test anchor pile connecting structure Download PDF

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Publication number
CN103485374A
CN103485374A CN201310475720.9A CN201310475720A CN103485374A CN 103485374 A CN103485374 A CN 103485374A CN 201310475720 A CN201310475720 A CN 201310475720A CN 103485374 A CN103485374 A CN 103485374A
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China
Prior art keywords
needle beam
anchor
fining twisted
tension
anchoring pile
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CN201310475720.9A
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CN103485374B (en
Inventor
张海江
杨书涛
马立仁
刘俊卿
李福申
王振泉
王广和
王哲英
任新底
马连辉
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ZHONGKAN GEOTECHNICAL INVESTIGATION DESIGN RESEARCH INSTITUTE Co Ltd
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ZHONGKAN GEOTECHNICAL INVESTIGATION DESIGN RESEARCH INSTITUTE Co Ltd
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Abstract

The invention discloses a static load test anchor pile connecting structure. The static load test anchor pile connecting structure comprises anchor devices which are fixedly connected with anchor bars at the top ends of anchor piles and top tensile devices which are connected with the anchor devices by the aid of precision rolling deformed steel bars, and the precision rolling deformed steel bars are both in threaded connection with the anchor devices and the top tensile devices. The static load test anchor pile connecting structure has the advantages that secondary beams and the anchor bars at the top ends of the anchor piles are connected in a threaded mode by the aid of connecting disks, only anchor sleeves need to be used for fixing the connecting disks on the anchor bars, then the connecting disks are connected with the secondary beams by the aid of small beams, small tensile beams and the precision rolling deformed steel bars, the working efficiency of threaded connection is far higher than the working efficiency of welding, moreover, the connecting disks, the small beams and the small tensile beams can be recycled, engineering cost is lowered, meanwhile, secondary connection is needless in the testing process of test piles for public anchor piles, the connecting structure can be recycled, and testing efficiency is improved.

Description

Static loading test anchoring pile syndeton
technical field
The present invention relates to the pile foundation static loading test equipment technology field of using in the civil engineering work construction, relate in particular to a kind of static loading test anchoring pile syndeton.
Background technology
Pile foundation is a kind of ancient basic pattern.Pile foundation technology has experienced the evolution of several thousand.No matter be pile foundation material and stake type, or pile foundation is mechanical and job practices has had huge development, has formed modernization Foundation Design system.In some cases, adopt pile foundation can reduce in a large number the consumption of job site workload and material.
The seventies, violent earthquake had several times once occurred in China.The Tangshan Earthquake of take wherein is example, and the building of all employing pile foundations generally is injured slightly.This explanation pile foundation distortion under seismic force effects is little, and good stability is a kind of effective measures that solve earthquake zone soft foundation and earthquake liquefaction ground anti-seismic problem.
Along with pile foundation, the use in architectural design more and more extensively grows up the dead load test on pile foundation technology.After the foundation of new China, the static load of pile foundation measuring technology just progressively grows up.The tradition static load test adopts the mode of manual pressure, manually-operated, manual record to carry out.To after the eighties in 20th century, along with the step of reform and opening-up, increasing year by year, the particularly castinplace pile extensive use on engineering of infrastructure scale, the static load of pile foundation measuring technology of China has also entered a brand-new developing period.Dead load test on pile foundation is set up as a method, in theory incontrovertible pile foundation detection.
In the dead load test on pile foundation process, large-tonnage single pile Vertical Static Loading Test particularly, adopt the anchor pile beam counterforce device more and more, in the traditional experiment process, anchoring pile and secondary beam connected mode adopt welded reinforcement on the anchor cylinder, there is following defect in this kind of syndeton: 1, anchor bar welds by means of the anchor cylinder, waste time and energy, work efficiency is lower; 2, because the reinforcing bar welded on the anchor cylinder is more and more, what have is welded on reinforcing bar, and welding quality is wayward, causes the anchor bar unbalance stress, and in process of the test, easily occurring fracture affects normal load, when serious, security incident can occur; 3, welding job amount is large, and material usage is large, and cost is high; If 4 driving analysis test on piles, while sharing anchoring pile, need, the reinforcing bar of anchoring pile and the welding of anchor cylinder, by the bar cutting of anchor cylinder and anchoring pile, can not share during dismounting during assembling.
Summary of the invention
For anchor bar welding efficiency in solution dead load test on pile foundation process is low, welding quality is wayward, easily occurs that security incident and Welder measure large problem, the invention provides a kind of static loading test anchoring pile syndeton.
Technical scheme of the present invention is as follows: a kind of static loading test anchoring pile syndeton, comprise the anchor device be fixedly connected with the anchor bar on anchoring pile top and the top tensile device be connected by means of fining twisted steel with anchor device, fining twisted steel all is threaded with anchor device and top tensile device.
Described anchor device comprises terminal pad and at least two needle beams, the magnitude setting through hole identical with anchor bar quantity on described terminal pad, described anchor bar is through the through hole setting, and the anchoring sleeve with its threaded engagement is set on its top, described needle beam is symmetrically set in the terminal pad below, and every needle beam two ends all vertically wear fining twisted steel, and dock with the top tensile device on the fining twisted steel top.
Described top tensile device comprises the tension needle beam be fixedly connected with the fining twisted steel top, the quantity of the quantity of described tension needle beam and bottom needle beam is equal and direction is identical, and two fining twisted steel tops that described and every root bottom part needle beam is connected are fixed by means of nut through after same tension needle beam.
Described needle beam is identical with tension needle beam structure, is H shape structure, and described fining twisted steel two ends snap in respectively in the breach at needle beam and tension needle beam two ends, and in needle beam bottom and tension needle beam top, nut is set respectively.
Described needle beam and tension needle beam all are set to many of equal number, and concrete radical is adjusted according to test maximum load amount.
Described terminal pad upper surface is provided with " rice " font deep floor.
The present invention compared with prior art will adopt and be threaded by means of terminal pad between the anchor bar on secondary beam and anchoring pile top, only need to use anchoring sleeve that terminal pad is fixed on anchor bar, then anchor pile and secondary beam are coupled together with fining twisted steel by means of needle beam and tension needle beam.The operating efficiency be threaded is much higher than welding, and terminal pad and needle beam and tension needle beam can reuse, reduce engineering cost, share simultaneously anchoring pile in process of the test without carrying out the secondary connection, syndeton can reuse, and improves test efficiency.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is anchor device structural representation of the present invention.
Fig. 3 is tensile device structural representation of the present invention.
Fig. 4 is terminal pad structural representation of the present invention.
Fig. 5 is needle beam structural representation of the present invention.
Being labeled as in accompanying drawing: 1, secondary beam; 2, tension needle beam; 3, terminal pad; 4, fining twisted steel; 5, nut; 6, pad; 7, anchor bar; 8, anchoring sleeve; 9, pad; 10, girder; 11, anchoring pile.
the specific embodiment
The following examples are to describe in further detail of the present invention.
The anchoring pile counterforce device that dead load test on pile foundation is often used is exactly that several anchoring piles by symmetrical around peg are coupled together with dowel and reaction frame, rely on the jack on stake top by reaction frame jack-up, provide counter-force by the anchoring pile be connected, provide the size of counter-force by anchoring pile quantity, reaction frame intensity determines with the uplift resistance that is connected anchoring pile.The anchoring pile counterforce device generally can not be subject to field condition and load the restriction of tonnage number, works as conditions permit, and adopting engineering pile is most economical as anchoring pile.Existing counter-force static-load testing device comprises the jack that is arranged on the foundation pile top, the girder that the buttress arranged by means of the foundation pile both sides is placed, place at least two vertical secondary beams on girder, secondary beam is connected with the anchoring pile top by means of the anchoring pile syndeton, pass through jack jacking girder and secondary beam in process of the test, and anchoring pile provides counter-force, realize foundation pile static loading test.Between existing secondary beam and anchoring pile, by anchor cylinder and anchor bar welding, realize being connected, being about to anchor cylinder top is connected with secondary beam, the anchor bar welding on anchor cylinder and anchoring pile top, welding interval is long, and the welding point level is uneven, easily cause the anchor bar discontinuity, welding efficiency is lower.For solving the existing existing problem of anchoring pile syndeton.
The invention provides a kind of anchoring pile of static loading test as shown in Figure 1 syndeton, comprise the anchor device be fixedly connected with the anchor bar 7 on anchoring pile 11 tops and the top tensile device be connected by means of fining twisted steel 4 with anchor device, fining twisted steel 4 all adopts and is threaded with anchor device and top tensile device, anchor device is located at the anchoring pile top, the top tensile device is connected with secondary beam 1, the counter-force of anchoring pile 11 is delivered on secondary beam 1, secondary beam 1 is located on girder 10 upper surfaces, pressure is passed to girder 10, in jack makes progress the jacking process, the pressure that realization is downward to foundation pile, carry out foundation pile static loading test, anchor device of the present invention (as shown in Figure 2) comprises terminal pad 3 and at least two needle beams, the magnitude setting through hole identical with anchor bar 7 quantity on described terminal pad 3, described anchor bar 7 is through the through hole setting, and arrange with the anchoring sleeve 8 of its threaded engagement and carry out anchoring on its top, described needle beam is symmetrically set in terminal pad 3 belows, and every needle beam two ends all vertically wear fining twisted steel 4, dock with the top tensile device on fining twisted steel 4 tops, needle beam arranges many, many needle beams are arranged in parallel, and the distance between adjacent two needle beams equates, needle beam is positioned at the terminal pad below, between needle beam and the tension needle beam on the secondary beam upper surface, with fining twisted steel, connect, and fix with nut and pad at the fining twisted steel two ends, fining twisted steel is the distance between anchoring pile and secondary beam fixedly, when the operation jack makes progress the top girder, girder, secondary beam, fining twisted steel and terminal pad form closed loop between (as shown in Figure 4), form counter-force, to pressing down foundation pile, realize foundation pile static loading test.
Described top tensile device (as shown in Figure 3) comprises the tension needle beam 2 be fixedly connected with fining twisted steel 4 tops, the quantity of the quantity of described tension needle beam 2 and bottom needle beam is equal and direction is identical, and two fining twisted steel 4 tops that described and every root bottom part needle beam is connected are fixed by means of nut through after same tension needle beam 2.Described needle beam is identical with tension needle beam 2 structures, be H shape structure (as shown in Figure 5), described fining twisted steel 4 two ends snap in respectively in the breach at needle beam and tension needle beam 2 two ends, and in needle beam bottom and tension needle beam 2 tops, nut is set respectively, needle beam and tension needle beam are H shape, its two ends all arrange breach, and breach vertically arranges, and fining twisted steel directly snaps in breach and gets final product with nut screwing clamping is fixing at two ends.
The present invention is by adopting and be threaded by means of terminal pad between the anchor bar by secondary beam and anchoring pile top, only need to use anchoring sleeve that terminal pad is fixed on anchor bar, then by means of needle beam, with tension needle beam and fining twisted steel, with secondary beam, be connected, the operating efficiency be threaded is much higher than welding, and terminal pad and needle beam and tension needle beam can reuse, reduce engineering cost, simultaneously public anchoring pile in the test pile process of the test without carrying out the secondary connection, syndeton can reuse, and improves test efficiency.

Claims (6)

1. a static loading test anchoring pile syndeton, it is characterized in that: comprise the anchor device be fixedly connected with the anchor bar (7) on anchoring pile (11) top and the top tensile device be connected by means of fining twisted steel (4) with anchor device, fining twisted steel (4) and anchor device and top tensile device are all with being threaded.
2. static loading test anchoring pile syndeton according to claim 1, it is characterized in that: described anchor device comprises terminal pad (3) and at least two needle beams, the upper magnitude setting through hole identical with anchor bar (7) quantity of described terminal pad (3), described anchor bar (7) is through the through hole setting, and the anchoring sleeve (8) with its threaded engagement is set on its top, described needle beam is symmetrically set in terminal pad (3) below, and every needle beam two ends all vertically wear fining twisted steel (4), dock with the top tensile device on fining twisted steel (4) top.
3. static loading test anchoring pile syndeton according to claim 1, it is characterized in that: described top tensile device comprises the tension needle beam (2) be fixedly connected with fining twisted steel (4) top, the quantity of described tension needle beam (2) is equal with the quantity of bottom needle beam and direction is identical, and two fining twisted steels (4) top that described and every root bottom part needle beam is connected is fixed by means of nut through after same tension needle beam (2).
4. according to the described static loading test anchoring pile of claim 2 or 3 syndeton, it is characterized in that: described needle beam is identical with tension needle beam (2) structure, be H shape structure, described fining twisted steel (4) two ends snap in respectively in the breach at needle beam and tension needle beam (2) two ends, and in needle beam bottom and tension needle beam (2) top, nut are set respectively.
5. static loading test anchoring pile syndeton according to claim 4, it is characterized in that: described needle beam and tension needle beam (2) all are set to many of equal number, and concrete radical is adjusted according to test maximum load amount.
6. static loading test anchoring pile syndeton according to claim 2, it is characterized in that: described terminal pad (3) upper surface is provided with " rice " font deep floor.
CN201310475720.9A 2013-10-12 2013-10-12 Static load test anchor pile connecting structure Active CN103485374B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103821165A (en) * 2014-02-20 2014-05-28 长春工程学院 Adjustable combined anchor beam structure
CN106638726A (en) * 2016-12-30 2017-05-10 中冶沈勘工程技术有限公司 Counter-force structure of static load test and static load test system
CN106638593A (en) * 2016-12-30 2017-05-10 中冶沈勘工程技术有限公司 Anchor rod connecting structure and anchor pressing structure
CN109778924A (en) * 2019-03-13 2019-05-21 福建方实工程检测有限公司 The test method of bearing capacity of pile foundation
CN111236328A (en) * 2020-01-17 2020-06-05 武汉建诚工程技术有限公司 Tubular pile pulling resistance detection device and detection method

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WO2007068903A1 (en) * 2005-12-12 2007-06-21 Terrain Geotechnical Consultants Limited A pile test apparatus
CN201310102Y (en) * 2008-12-05 2009-09-16 中国建筑东北设计研究院有限公司 Static load test conversion beam
CN201857620U (en) * 2010-11-05 2011-06-08 中国科学院武汉岩土力学研究所 Device for conducting vertical anti-pulling static loading experiment to pile and board foundation of electricity transmission tower
CN202214742U (en) * 2011-08-17 2012-05-09 北京东方新星石化工程股份有限公司 Anchor pile locking device in static load test
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
CN203049635U (en) * 2013-03-13 2013-07-10 中铁西北科学研究院有限公司 Static loading test quick linking device by anchor pile method
CN203569595U (en) * 2013-10-12 2014-04-30 中勘冶金勘察设计研究院有限责任公司 Static load test anchoring pile connecting structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007068903A1 (en) * 2005-12-12 2007-06-21 Terrain Geotechnical Consultants Limited A pile test apparatus
CN201310102Y (en) * 2008-12-05 2009-09-16 中国建筑东北设计研究院有限公司 Static load test conversion beam
CN201857620U (en) * 2010-11-05 2011-06-08 中国科学院武汉岩土力学研究所 Device for conducting vertical anti-pulling static loading experiment to pile and board foundation of electricity transmission tower
CN202214742U (en) * 2011-08-17 2012-05-09 北京东方新星石化工程股份有限公司 Anchor pile locking device in static load test
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
CN203049635U (en) * 2013-03-13 2013-07-10 中铁西北科学研究院有限公司 Static loading test quick linking device by anchor pile method
CN203569595U (en) * 2013-10-12 2014-04-30 中勘冶金勘察设计研究院有限责任公司 Static load test anchoring pile connecting structure

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103821165A (en) * 2014-02-20 2014-05-28 长春工程学院 Adjustable combined anchor beam structure
CN103821165B (en) * 2014-02-20 2016-05-11 长春工程学院 A kind of adjustable combined type earth anchor girder construction
CN106638726A (en) * 2016-12-30 2017-05-10 中冶沈勘工程技术有限公司 Counter-force structure of static load test and static load test system
CN106638593A (en) * 2016-12-30 2017-05-10 中冶沈勘工程技术有限公司 Anchor rod connecting structure and anchor pressing structure
CN109778924A (en) * 2019-03-13 2019-05-21 福建方实工程检测有限公司 The test method of bearing capacity of pile foundation
CN111236328A (en) * 2020-01-17 2020-06-05 武汉建诚工程技术有限公司 Tubular pile pulling resistance detection device and detection method

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