CN101435207A - Uplift pile loading test method and apparatus - Google Patents
Uplift pile loading test method and apparatus Download PDFInfo
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- CN101435207A CN101435207A CNA2008102315015A CN200810231501A CN101435207A CN 101435207 A CN101435207 A CN 101435207A CN A2008102315015 A CNA2008102315015 A CN A2008102315015A CN 200810231501 A CN200810231501 A CN 200810231501A CN 101435207 A CN101435207 A CN 101435207A
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- 238000010998 test method Methods 0.000 title claims description 34
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 5
- 210000003205 muscle Anatomy 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 15
- 238000004873 anchoring Methods 0.000 description 9
- 230000003068 static effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses an uplift pile load testing method and a device thereof. The testing method includes the following steps: (1) selecting proper testing beam based on the uplift pile and erecting the testing beam on the uplift pile; (2) putting a jack on the testing beam; (3) putting a force transfer device on the upper surface of the jack; (4) putting a tension pulley under the jack, passing a wire rope through the force transfer device and the tension pulley, wherein the wire rope passes through the force transfer device in symmetry way, the two ends of the wire rope are fixed together, the shaft of the tension pulley is provided with an anchor rib, and the anchor rib is fixed with the steel bar of the uplift pile; and (5) operating the jack, the steel bar of the uplift pile begins to uniformly bear uplift force, thereby the uplift rib can reach maximum load under the function of the uplift force of the jack. The invention can cause the steel bar of uplift pile uniformly bear uplift load by using simple method and simple testing device so as to obtain accurately tested force parameters of the uplift pile.
Description
Technical field
The invention belongs to static load of pile foundation lotus test field, relate to a kind of method that is applied in the vertical static load test of uplift pile specifically, also relate to the device of this test method special use.
Background technology
Along with developing rapidly of industry, it is more and more many that building bear the situation of pulling out load.Bear the stake of pulling out load or bearing vertically pulling-resistant power in the engineering and be called uplift pile.Uplift pile belongs to the engineering pile foundation category, is widely used in the anchoring pile basis of first mate's basement anti-floating, towering building resistance to plucking, tidal quay platform resistance to plucking, suspension bridge and cable stayed bridge, the pile foundation of Large Ship Dock base plate and the anchoring pile basis in the dead load test pile etc.In engineering construction, the bearing capacity of uplift pile has become a very important technological means of Control Engineering quality.The accurate test of bearing capacity of single pile all plays a part very important for the design of design of all kinds of building foundations and even superstructure.And single-pile vertical orientation uplift pile static load test is to detect directly perceived, the most reliable method of single-pile vertical orientation uplift pile bearing capacity.In the single-pile static loading test, the load that acts in the stake is generally provided by counterforce device.The easy-to-use degree direct influence of counterforce device the process and the result of test, and commonly used have preloading reaction beam device and an anchoring pile reaction beam device.Anchoring pile reaction beam device can be divided into two kinds according to the difference of counter-force anchor again in concrete application: reaction frame and anchoring pile are linked together provides counter-force, is commonly called as anchoring pile reaction beam device; Several double helix are pierced underground use earth anchor counter-force is provided, be commonly called as anchor pole reaction beam device.Under jack cooperated, this device can more evenly and lentamente be applied to force rate in the stake, can obviously improve the overshoot phenomenon in the electric oil pump loading, thereby made the size ratio of capacity value be easier to control.But anchoring pile reaction beam device, because in a single day earth anchor makes, the distance of earth anchor and counter-force application point just can not change, it is installed and has a centering problem, if the counter-force application point has departed from the center of pile crown, the lighter makes the experimental data distortion, and weight person can make test pile be destroyed.And preloading reaction beam device can't satisfy the test requirements document of uplift pile static load.Therefore the method and apparatus device of existing load application is difficult to maybe can not satisfy design, instructions for use.To the method and apparatus device of uplift pile loading test load application, still none reasonable method and testing equipment device.
Summary of the invention
Purpose of the present invention just is to overcome above-mentioned deficiency a kind of uplift pile loading test method and device thereof is provided, and has solved the technical problem that experimental data distortion or test pile are subject to destruction.
Technical scheme of the present invention is:
A kind of uplift pile loading test method may further comprise the steps:
1.:, will test with roof beam structure being located in the uplift pile according to the test beam that the uplift pile selection adapts to;
2.: jack is placed on test with on the crossbeam;
3.: the upper surface at jack is placed load transfer device;
4.: placement pulling force pulley below very heavy, steel cable is passed load transfer device and pulling force pulley, and wire rope symmetry on load transfer device is passed, and the two ends of wire rope are fixed together, on the axle of pulling force pulley anchor rib is set, the reinforcing bar of anchor rib and uplift pile is fixed;
5.: the operation jack, the reinforcing bar of uplift pile begins evenly to be subjected to uplift force, and then under the effect of jack upward force, makes the resistance to plucking muscle reach the peak load that can bear.
Above-mentioned uplift pile loading test method, step 1. in test with the central point of beam, step 3. in the central point of the central point of upper surface central point, load transfer device of jack and uplift pile on same axis.
The 3. described load transfer device of above-mentioned uplift pile loading test method, step is an annular disk, in the middle of the annular disk support is set, and the upper surface of jack contacts with support, and 4. step is that steel cable is passed annular disk and pulling force pulley.
The 3. described load transfer device of above-mentioned uplift pile loading test method, step is the general-purpose force transmiting disk, and the general-purpose force transmiting disk is provided with through hole, and the upper surface of jack contacts with the soffit of general-purpose force transmiting disk; 4. step is that steel cable is passed on the through hole and pulling force pulley of general-purpose force transmiting disk.
Above-mentioned uplift pile loading test method is also placed semicircle pulling force wheel between wire rope and general-purpose force transmiting disk in step in 4., and the pulling force wheel is provided with groove, and wire rope is placed in the groove.
Above-mentioned uplift pile loading test method, step also are provided with ground tackle in 4. on anchor rib.
The device that above-mentioned uplift pile loading test method is used, comprise jack, counterforce device and test use crossbeam, jack to be placed on test with on the crossbeam, and the upper surface of jack contacts with the soffit of counterforce device, establish the pulling force pulley below the jack, described counterforce device is made of load transfer device and wire rope, steel wire penetrating counterforce device and pulling force pulley, and wire rope symmetry on load transfer device is passed, the two ends of wire rope are fixed together, on the axle of pulling force pulley, anchor rib are set.
The device that above-mentioned uplift pile loading test method is used, described load transfer device is an annular disk, in the middle of the annular disk support is set, the upper surface of jack contacts with support, steel wire penetrating annular disk and pulling force pulley.
The device that above-mentioned uplift pile loading test method is used, described load transfer device are the general-purpose force transmiting disks, and the general-purpose force transmiting disk is provided with through hole, the through hole of steel wire penetrating general-purpose force transmiting disk and pulling force pulley.
The device that above-mentioned uplift pile loading test method is used is placed semicircle pulling force wheel between the through hole of wire rope and general-purpose force transmiting disk, the pulling force wheel is provided with groove, and wire rope is placed in the groove, and ground tackle is set on anchor rib.
But the present invention's uplift pile loading test method is simple, this method can make the reinforcing bar of uplift pile evenly be subjected to pulling out load, accurately to be recorded each mechanics parameter of uplift pile, this test method is that the reinforcing bar with anchor rib and uplift pile is fixed together, what jack was firm is placed on test with on the crossbeam, the upper surface of jack withstands the soffit of general-purpose force transmiting disk, power on the jack passes on the wire rope by the general-purpose force transmiting disk like this, again by wire rope transfers to the single pile reinforcing bar, initialization phase, wire rope is tightened up gradually along with the stressed gradually of each origin of force, owing to be through hole and the pulling force reel that steel cable passes the general-purpose force transmiting disk, therefore wire rope continuous length of adjusting between through hole and pulling force wheel begins evenly to be subjected to uplift force until the reinforcing bar of each uplift pile in the process of tension, and then under the effect of the upward force of jack, the peak load that uplift pile is reached can bear, between general-purpose force transmiting disk and wire rope, add semicircle pulling force wheel, when jack upwards pushes up like this, the stress of through hole wire rope is disperseed relatively, prolong the application life of wire rope.According to different uplift piles, the method for the passing difference of wire rope of the present invention can be walked around adjacent two through hole and also can pass between non-conterminous two through hole.The present invention just can make the reinforcing bar of uplift pile evenly be subjected to pulling out load by simple method, accurately to be recorded each mechanics parameter of uplift pile.And test method of the present invention is simple, and experimental rig is simple in structure, and is easy to use, can satisfy the requirement of uplift pile vertical dead-load test.Uplift pile loading test method and device thereof are applicable to the anchoring pile basis of first mate's basement anti-floating, towering building resistance to plucking, tidal quay platform resistance to plucking, suspension bridge and cable stayed bridge, the pile foundation of Large Ship Dock base plate and the anchoring pile basis in the dead load test pile etc.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the connection diagram of Fig. 1 load transfer device and wire rope;
Fig. 3 is the another kind of structural representation of apparatus of the present invention;
Fig. 4 is the connection diagram of Fig. 3 load transfer device and semicircle pulling force wheel and wire rope.
The specific embodiment
Embodiment 1: a kind of uplift pile loading test method may further comprise the steps:
1.:, will test with roof beam structure being located in the uplift pile according to the test beam that the uplift pile selection adapts to;
2.: jack is placed on test with on the crossbeam;
3.: the upper surface at jack is placed annular disk, in the middle of the annular disk support is set, and the upper surface of jack contacts with support;
4.: steel cable is passed on annular disk and the pulling force pulley, and wire rope symmetry on annular disk is passed, and the two ends of wire rope are fixed, and on the axle of pulling force pulley anchor rib is set, the reinforcing bar welding of anchor rib and uplift pile;
5.: the operation jack, the reinforcing bar of uplift pile begins evenly to be subjected to uplift force, and then under the effect of the upward force of jack, makes the resistance to plucking muscle reach the peak load that can bear.
Embodiment 2: a kind of uplift pile loading test method, step 1., step 2. with step 5. with embodiment 1, the 3. described load transfer device of step is the general-purpose force transmiting disk, the general-purpose force transmiting disk is provided with through hole; 4. step is that wire rope symmetry on the general-purpose force transmiting disk is passed, and then the two ends of wire rope is fixed with the through hole and the pulling force pulley of steel cable precedence at the general-purpose force transmiting disk.
Embodiment 3: a kind of uplift pile loading test method, step 1., step 2., step 3. with step 5. with embodiment 2, step is 4. identical with embodiment 2,4. also place semicircle pulling force wheel between wire rope and general-purpose force transmiting disk in step in, the pulling force wheel is provided with groove, and wire rope is placed in the groove.
Above-mentioned uplift pile loading test method, preferable methods are that ground tackle is set on anchor rib, just need not weld can be directly the reinforcing bar of dowel and uplift pile to be fixed together, and can take off ground tackle easily after the off-test.
Above-mentioned uplift pile loading test method, best real mode be step 1. in test with the central point of beam, step 3. in the central point of the central point of upper surface central point, load transfer device of jack and uplift pile on same axis, guarantee that like this reinforcing bar is subjected to uniform uplift force in the uplift pile, experimental data is more accurate.
The device that uplift pile loading test method as depicted in figs. 1 and 2 is used, comprise jack 4, counterforce device and test crossbeam 5, jack is placed on test with on the crossbeam 5, the upper surface of jack 4 contacts with the soffit of counterforce device, below jack, be provided with pulling force pulley 6, described counterforce device is made of load transfer device and wire rope 3, steel cable passes on counterforce device and the pulling force pulley 6, wire rope symmetry on counterforce device is passed, the two ends of wire rope are fixed, and on the axle of pulling force pulley 6 anchor rib 7 are set, and described load transfer device is an annular disk 10, support 11 is set in the middle of the annular disk, the upper surface of jack contacts with support 11, and steel wire penetrating annular disk 10 and pulling force pulley 6 are provided with ground tackle 9 on anchor rib 7.
A kind of single-pile vertical orientation resistance to plucking static load test device as shown in Figure 3 and Figure 4, jack is placed on test with on the crossbeam 5, the upper surface of jack 4 contacts with the soffit of general-purpose force transmiting disk 2, the pulling force pulley is set below the jack, described counterforce device is made of general-purpose force transmiting disk 2 and wire rope 3, the general-purpose force transmiting disk is provided with through hole 8, steel cable passes the through hole 8 and pulling force pulley 6 of general-purpose force transmiting disk, wire rope symmetry on the general-purpose force transmiting disk is passed, on the axle of pulling force pulley 6, anchor rib 7 is set, between the through hole of wire rope and general-purpose force transmiting disk, place semicircle pulling force wheel 1, pulling force wheel 1 is provided with groove, and wire rope is placed in the groove, and ground tackle 9 is set on anchor rib, on adjacent two through hole of steel wire penetrating and the pulling force reel, wire rope symmetry on the general-purpose force transmiting disk is passed.
The central point of the central point of the test usefulness beam of apparatus of the present invention, the upper surface central point of jack, load transfer device and the central point of uplift pile can make the data of measuring more accurate on same axis.
Apparatus of the present invention can also be according to different uplift piles, and the method for the passing difference of wire rope can be passed adjacent two through hole and also can be passed between non-conterminous two through hole, as long as symmetry can both realize the purpose of testing on the general-purpose force transmiting disk.
Operating principle of the present invention is as follows: according to the situation of uplift pile, on the general-purpose force transmiting disk, pass with the steel cable symmetry with the pulling force pulley room, the reinforcing bar of uplift pile is welded on the anchor rib, what jack was firm is placed on test with on the crossbeam, the upper surface of jack withstands the center of the soffit of general-purpose force transmiting disk, power on the jack passes on the wire rope by the general-purpose force transmiting disk like this, again by wire rope transfers to the single pile reinforcing bar, initialization phase, wire rope is tightened up gradually along with the stressed gradually of each origin of force, because wire rope can be movable on through hole and pulling force reel, therefore wire rope continuous length of adjusting in through hole begins evenly to be subjected to uplift force until the reinforcing bar of each uplift pile in the process of tension, the pulling capacity direction of reinforcing bar is consistent on the direction of counter-force active force and the pile crown like this, and then under the effect of the upward force of jack, the peak load that uplift pile is reached can bear, the present invention just can make the reinforcing bar of uplift pile evenly be subjected to pulling out load by simple method, accurately to be recorded each mechanics parameter of uplift pile.
Claims (10)
1, a kind of uplift pile loading test method may further comprise the steps:
1.:, will test with roof beam structure being located in the uplift pile according to the test beam that the uplift pile selection adapts to;
2.: jack is placed on test with on the crossbeam;
3.: the upper surface at jack is placed load transfer device;
4.: placement pulling force pulley below very heavy, steel cable is passed load transfer device and pulling force pulley, and wire rope symmetry on load transfer device is passed, and the two ends of wire rope are fixed together, on the axle of pulling force pulley anchor rib is set, the reinforcing bar of anchor rib and uplift pile is fixed;
5.: the operation jack, the reinforcing bar of uplift pile begins evenly to be subjected to uplift force, and then under the effect of jack upward force, makes the resistance to plucking muscle reach the peak load that can bear.
2, uplift pile loading test method according to claim 1 is characterized in that: step 1. in test with the central point of beam, step 3. in the central point of the central point of upper surface central point, load transfer device of jack and uplift pile on same axis.
3, uplift pile loading test method according to claim 2, it is characterized in that: the 3. described load transfer device of step is an annular disk, in the middle of the annular disk support is set, the upper surface of jack contacts with support, and 4. step is that steel cable is passed annular disk and pulling force pulley.
4, uplift pile loading test method according to claim 2 is characterized in that: the 3. described load transfer device of step is the general-purpose force transmiting disk, and the general-purpose force transmiting disk is provided with through hole, and the upper surface of jack contacts with the soffit of general-purpose force transmiting disk; 4. step is that steel cable is passed on the through hole and pulling force pulley of general-purpose force transmiting disk.
5, uplift pile loading test method according to claim 4 is characterized in that: also place semicircle pulling force wheel between wire rope and general-purpose force transmiting disk in step in 4., the pulling force wheel is provided with groove, and wire rope is placed in the groove.
6, according to claim 3 or 4 described uplift pile loading test methods, it is characterized in that: step also is provided with ground tackle in 4. on anchor rib.
7, the used device of uplift pile loading test method as claimed in claim 1, comprise jack, counterforce device and test crossbeam, it is characterized in that: jack is placed on test with on the crossbeam, the upper surface of jack contacts with the soffit of counterforce device, establish the pulling force pulley below the jack, described counterforce device is made of load transfer device and wire rope, steel wire penetrating counterforce device and pulling force pulley, wire rope symmetry on load transfer device is passed, the two ends of wire rope are fixed together, on the axle of pulling force pulley, anchor rib are set.
8, the used device of uplift pile loading test method according to claim 7, it is characterized in that: described load transfer device is an annular disk, in the middle of the annular disk support is set, the upper surface of jack contacts with support, steel wire penetrating annular disk and pulling force pulley.
9, the used device of uplift pile loading test method according to claim 8 is characterized in that: described load transfer device is the general-purpose force transmiting disk, and the general-purpose force transmiting disk is provided with through hole, the through hole of steel wire penetrating general-purpose force transmiting disk and pulling force pulley.
10, according to Claim 8 or the used device of 9 described uplift pile loading test methods, it is characterized in that: between the through hole of wire rope and general-purpose force transmiting disk, place semicircle pulling force wheel, the pulling force wheel is provided with groove, and wire rope is placed in the groove, and ground tackle is set on anchor rib.
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| CN2008102315015A CN101435207B (en) | 2008-12-24 | 2008-12-24 | Uplift pile loading test method and apparatus |
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| CN2008102315015A CN101435207B (en) | 2008-12-24 | 2008-12-24 | Uplift pile loading test method and apparatus |
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| CN101435207A true CN101435207A (en) | 2009-05-20 |
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| CN101831925A (en) * | 2010-06-01 | 2010-09-15 | 张百全 | Detection method for static load of pile foundation |
| CN101839002A (en) * | 2010-05-27 | 2010-09-22 | 关喜才 | Compressive pile full-automatic hydraulic load detection device and method+ |
| CN101839001A (en) * | 2010-05-27 | 2010-09-22 | 关喜才 | Compressive pile load detection device and method |
| CN102589911A (en) * | 2012-01-19 | 2012-07-18 | 关喜才 | Site-load simulation experiment device of beam type structure and detecting method thereof |
| CN102798569A (en) * | 2012-08-10 | 2012-11-28 | 中铁隧道集团有限公司 | Tunnel hand hole joint bar drawing device and drawing method thereof |
| CN102995669A (en) * | 2012-12-14 | 2013-03-27 | 广东省建筑科学研究院 | Large-tonnage foundation pile uplift-resistant static test connection device, loading counter-force system and method |
| CN103983518A (en) * | 2014-05-30 | 2014-08-13 | 重庆科技学院 | Suction mechanics performance test method for concrete substrate under wind load |
| CN104480977A (en) * | 2014-11-26 | 2015-04-01 | 国家电网公司 | Anti-lift load testing device for rock anchorage bar foundation |
| CN108375504A (en) * | 2018-01-25 | 2018-08-07 | 河海大学 | A kind of anchorage formula reaction frame experimental rig suitable for underground space structure |
| CN110117968A (en) * | 2019-05-24 | 2019-08-13 | 中铁大桥局集团第五工程有限公司 | A kind of 4000t grades of pile foundation vertical pressure-resistant static load test method |
| CN112362321A (en) * | 2020-10-23 | 2021-02-12 | 杭州河口水利科技有限公司 | Surface protection block anti-tripping bearing capacity testing device and testing method thereof |
| CN112854317A (en) * | 2021-01-12 | 2021-05-28 | 佛山市建筑工程质量检测站 | Auxiliary clamp for uplift test of cast-in-place pile |
| CN114922235A (en) * | 2022-05-19 | 2022-08-19 | 安徽理工大学 | Horizontal and vertical combined loading device and method for pile foundation model test |
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| CN117188534A (en) * | 2023-09-04 | 2023-12-08 | 浙大城市学院 | System and method for testing bearing capacity of uplift pile |
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- 2008-12-24 CN CN2008102315015A patent/CN101435207B/en active Active
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| CN101839001A (en) * | 2010-05-27 | 2010-09-22 | 关喜才 | Compressive pile load detection device and method |
| CN101839002B (en) * | 2010-05-27 | 2011-12-21 | 关喜才 | Compressive pile full-automatic hydraulic load detection device and method+ |
| CN101831925B (en) * | 2010-06-01 | 2012-07-25 | 张百全 | Detection method for static load of pile foundation |
| CN101831925A (en) * | 2010-06-01 | 2010-09-15 | 张百全 | Detection method for static load of pile foundation |
| CN102589911A (en) * | 2012-01-19 | 2012-07-18 | 关喜才 | Site-load simulation experiment device of beam type structure and detecting method thereof |
| CN102589911B (en) * | 2012-01-19 | 2014-10-22 | 关喜才 | Site-load simulation experiment device of beam type structure and detecting method thereof |
| CN102798569B (en) * | 2012-08-10 | 2015-08-12 | 中铁隧道集团有限公司 | A kind of tunnel hand hole joint bar draw-off gear and Hubbing method thereof |
| CN102798569A (en) * | 2012-08-10 | 2012-11-28 | 中铁隧道集团有限公司 | Tunnel hand hole joint bar drawing device and drawing method thereof |
| CN102995669A (en) * | 2012-12-14 | 2013-03-27 | 广东省建筑科学研究院 | Large-tonnage foundation pile uplift-resistant static test connection device, loading counter-force system and method |
| CN103983518A (en) * | 2014-05-30 | 2014-08-13 | 重庆科技学院 | Suction mechanics performance test method for concrete substrate under wind load |
| CN104480977A (en) * | 2014-11-26 | 2015-04-01 | 国家电网公司 | Anti-lift load testing device for rock anchorage bar foundation |
| CN106769848B (en) * | 2016-12-30 | 2023-05-12 | 郑州科技学院 | Anchor bolt drawing test system and test method |
| CN108375504A (en) * | 2018-01-25 | 2018-08-07 | 河海大学 | A kind of anchorage formula reaction frame experimental rig suitable for underground space structure |
| CN110117968A (en) * | 2019-05-24 | 2019-08-13 | 中铁大桥局集团第五工程有限公司 | A kind of 4000t grades of pile foundation vertical pressure-resistant static load test method |
| CN110117968B (en) * | 2019-05-24 | 2021-01-15 | 中铁大桥局集团第五工程有限公司 | 4000 t-level pile foundation vertical compression-resistant static load test method |
| CN112362321A (en) * | 2020-10-23 | 2021-02-12 | 杭州河口水利科技有限公司 | Surface protection block anti-tripping bearing capacity testing device and testing method thereof |
| CN112854317A (en) * | 2021-01-12 | 2021-05-28 | 佛山市建筑工程质量检测站 | Auxiliary clamp for uplift test of cast-in-place pile |
| CN114922235A (en) * | 2022-05-19 | 2022-08-19 | 安徽理工大学 | Horizontal and vertical combined loading device and method for pile foundation model test |
| CN117188534A (en) * | 2023-09-04 | 2023-12-08 | 浙大城市学院 | System and method for testing bearing capacity of uplift pile |
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