CN110295632A - A kind of single pile bearing capacity method and its experimental rig - Google Patents
A kind of single pile bearing capacity method and its experimental rig Download PDFInfo
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- CN110295632A CN110295632A CN201910631196.7A CN201910631196A CN110295632A CN 110295632 A CN110295632 A CN 110295632A CN 201910631196 A CN201910631196 A CN 201910631196A CN 110295632 A CN110295632 A CN 110295632A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 54
- 239000002689 soil Substances 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 241001074085 Scophthalmus aquosus Species 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 11
- 238000010998 test method Methods 0.000 abstract description 7
- 238000004873 anchoring Methods 0.000 description 12
- 238000010276 construction Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/1671—Shapes helical or spiral
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention is a kind of new single pile bearing capacity method, including pile foundation to be measured, auger stem, pull rod, pressure beam and jack device, further comprising the steps of: the fixation position of auger stem is selected according to the position of pile foundation to be measured；Auger stem is pierced in soil layer by piling machine and is fixed, the pull rod is fixed on the upper end of auger stem；Pull rod is locked in the portion of pressure beam；Jack device is set between the pressure beam and the pile foundation to be measured, apply pressure by jack device, jack up another part of the pressure beam, cooperated by auger stem, pull rod and pressure beam to pile foundation to be measured and generate reaction force, to test the single pile vertical resistance pressure bearing capacity of pile foundation to be measured.The present invention also provides the experimental rig of the above-mentioned test method of application, test method according to the present invention and experimental rig reduce the requirement to detection test site, reduce security risk during detection test, reduce detection testing expenses cost and time cost.
Description
Technical field
The present invention relates to pile bearing capacity detection field, especially a kind of single pile bearing capacity method and its examination
Experiment device.
Background technique
Construction engineering test is to guarantee that construction engineering quality has to means, with the test of single pile vertical resistance pressure dead-load detection
For, the foundation pile of existing architectural engineering carries out the test of single pile vertical resistance pressure dead-load detection, usually wraps to the loading device of test pile
Anchoring pile counter-force boom device and ballasting platform counterforce device two types are included.
Wherein, anchoring pile counter-force boom device connects anchor pole or utilization on anchoring pile top using more engineering piles or more anchoring piles
Longitudinal reinforcement on engineering pile anchors reaction beam, is loaded by jack pair single pile to be tested, and it is anti-to carry out single-pile vertical orientation
Press static test.But there are biggish limitations for this anchoring pile counter-force boom device, for example need to choose the engineering pile of suitable distance
As anchoring pile, if needing to spend great number when suitably apart from interior not properly with sufficient amount of engineering pile as anchoring pile
Cost constructs cast-in-place concrete pile as anchoring pile, and after anchoring pile construction, after need to waiting until the age that pile body reaches 28 days, just may be used
Pile bearing capacity experiment is carried out, greatly the delay construction-engineering project duration, and after test pile, the anchoring pile constructed is unfavorable for
Construction in later period carries out.
Ballasting platform counterforce device, by the enough concrete bearing blocks of primary property preloading on ballast platform, so that mixed
The test load of the total weight >=1.2 times single pile to be measured of solidifying soil bearing block and girder, strut beam, applies pressure by jack,
So that the girder of ballast platform generates reaction force and loads to single pile to be measured, vertical compression static load is carried out to single pile to be measured
Test.The girder steel as used in ballast platform is more, and weight is big, and the concrete bearing block freight volume transported is bigger, and transports
Cost is higher, when transporting and lifting concrete bearing block or girder steel, substantially increases the cost of transport and lifting；And it is right
In the pile foundation stake to be tested of big load, on the ground of the buttress position of ballast platform two sides, to foundation stabilization or it need to change and fill out processing,
To increase the basement process expense of ballast platform buttress position, and processing is filled out even if change to the ground of buttress position,
Also the unstability of ground can not be avoided completely and caused by security risk.
Summary of the invention
Present invention aims at above-mentioned technical problem is solved, provide a kind of new single pile bearing capacity method and
Its experimental rig reduces security risk during detection test to reduce the requirement to detection test site, reduces detection examination
Test expense cost and time cost.
In order to achieve the above object, technical solution of the present invention has:
A kind of single pile bearing capacity method, including pile foundation to be measured, auger stem, pull rod, pressure beam and thousand
Jin ejection device, further comprising the steps of:
The fixation position of auger stem is selected according to the position of pile foundation to be measured；
Auger stem is pierced in soil layer by piling machine and is fixed, the pull rod is fixed on the upper end of auger stem；
Pull rod is locked on the portion of pressure beam；
Jack device is set between the pressure beam and the pile foundation to be measured, is applied by jack device and is pressed
Power jacks up another part of the pressure beam, is cooperated by auger stem, pull rod and pressure beam to pile foundation to be measured and generates reaction
Power, to test the single pile vertical resistance pressure bearing capacity of pile foundation to be measured；
The displacement data in testing of pile foundation to be measured is recorded by test device.
According to the single pile bearing capacity method of the application, it is fixed in soil layer by the way that auger stem is arranged with anti-
The mode of active force tests pile foundation to be measured, compares with the single pile vertical resistance pressure bearing capacity test method of existing pile foundation, we
Method saves the expense of transport and equipment hoisting, reduces lifting and detection test without transporting a large amount of concrete bearing block
Security risk in the process effectively reduces the whole cost cost of engineering；Test site is wanted in addition, also reducing
It asks, without selecting suitable engineering pile or in addition constructing concrete deadman, and relative to needing concrete deadman of separately constructing
The test method of pile foundation to be measured is tested, the present processes construction time is short, can be in the time of a couple of days by piling machine
Interior pierce a large amount of auger stem in soil layer is fixed, and to form the basis of test, needs to wait 28 relative to concrete deadman
It could start to test after its intensity is enough, can greatly reduce the testing time, so as to shorten the test pile of entire engineering
Time does not influence the duration of engineering construction；And auger stem is recyclable and reusable device, be can be avoided mixed
Solidifying soil anchoring pile stays in soil layer, influences the construction in later period.
Further, the fixed bit has installed multiple, and the quantity of the auger stem cooperates the number of the fixed position
Amount setting, the position of the pile foundation to be measured is set to the center that each fixed position connects the polygon or line to be formed.
So it is general during the test, can optimization according to pile foundation to be measured to the fixation position of auger stem, enable pile foundation to be measured
It is enough formed in the center of the geometry of multiple fixed positions, that is, the counter-force for enabling pressure beam to be formed uniformly covers
On the pile foundation to be measured, rollover event etc. occurs for test result inaccuracy caused by avoiding because of unbalance stress, test process.
Further, the quantity of the auger stem is N times of quantity of the fixed position, the N for greater than etc.
In 1 natural number, the auger stem is evenly distributed in the fixed position.When the test of need pile foundation to be measured to be tested is held
Carry power it is larger when, can suitable auger stem for increasing each fixed position quantity, and in order to avoid each fixed bit
There is the appearance of the case where unbalance stress in the auger stem at the place of setting, is also uniformly distributed the auger stem of each fixed position, so that
The pull rod being fixed on auger stem also can be uniformly distributed.
Further, the pressure beam includes girder and secondary beam, a part and pull rod of the secondary beam or the secondary beam
Be fixedly connected, which is used for power stepless action in the girder, the girder for pressure stepless action in it is described to
On pile base.
Further, the auger stem includes augers and connecting head, and the augers is for piercing soil
Layer is fixed, and the connecting head with pull rod for connecting, so that pull rod is connected and fixed with auger stem.
It further, further include that centre is plugged into drilling rod, centre drilling rod of plugging into is set to the auger stem and drawing
Between bar, when the auger stem length is inadequate, by the centre plug into drilling rod increase auger stem length, the spiral shell made
Rotary drill bar and pull rod keep connecting.When auger stem can not provide enough soil resistances by the soil layer that this body length is pierced
When, the power of piling machine can be transmitted by increasing intermediate drill, and the length for extending auger stem makes auger stem
The soil layer that deeper can be pierced provides bigger frictional force.
A kind of experimental rig using above-mentioned single pile bearing capacity method, including auger stem, pull rod, pressure
Beam and jack device, the auger stem are pierced in soil layer and are fixed, and the pull rod is fixed on above auger stem, and will be drawn
In a part of pressure beam, the jack device is set between pile foundation to be measured and pressure beam rod lock.
Further, the auger stem includes augers and connecting head, and the augers outer surface is equipped with solid
Determine spiral；The connecting head is for fixing the pull rod.
Further, the fixed spiral is the fixed spiral of tooth form.
Further, the pull rod lower end is equipped with threaded end, is fixed on pull rod by the threaded end
On the connecting head.
Detailed description of the invention
Fig. 1 is the structure front view of experimental rig of the invention in test；
Fig. 2 is the partial enlarged view of Fig. 1；
Fig. 3 is the structural side view of experimental rig of the invention in test；
Fig. 4 is the front view and cross-sectional view of auger stem of the invention；
Fig. 5 is a kind of top view of embodiment of experimental rig of the invention；
Fig. 6 is the top view of another embodiment of experimental rig of the invention.
Specific embodiment
A kind of single pile bearing capacity method of the invention and its experimental rig is described with reference to the drawings.
A kind of single pile bearing capacity device as shown in figures 1 and 3, including auger stem 7, pull rod 4, pressure
Beam 3 and jack device 2, the auger stem 7 are pierced in soil layer and are fixed, and the pull rod 4 is fixed on 7 top of auger stem,
And pull rod 4 is locked on the portion of pressure beam 3, the jack device 2 be set to pile foundation 1 to be measured and pressure beam 3 it
Between,.
There is auger stem 7 its to fix position, for the active force uniform force for bearing pile foundation 1 to be measured, it is advantageous to
, it should the position of the pile foundation 1 to be measured is set to each fixed position and is connected in the polygon or line to be formed
The heart, so that the active force for allowing each auger stem 7, pull rod 4 and the cooperation of pressure beam 3 to generate uniformly acts on pile foundation 1 to be measured
On, a kind of embodiment as shown in Figure 5, there are two fixed positions for setting, wherein each fixed position is evenly arranged with four spiral shells
Rotary drill bar 7 and four pull rods 4, and pile foundation to be measured 1 is then set to the center of the line of two fixed positions, so that pile foundation to be measured 1
Uniform force；For another example another embodiment shown in fig. 6, there are four fixed positions for setting, wherein each fixed position is uniformly set
It sets there are four auger stem 7 and four pull rods 4, and pile foundation to be measured 1 is then set to four sides that the line of four fixed positions is formed
The geometric center of shape, so that 1 uniform force of pile foundation to be measured.
The pressure beam 3 includes girder 31 and secondary beam, and a part and pull rod 4 of the secondary beam or the secondary beam are fixed to be connected
It connects, which is used for power stepless action in the girder 31, and the girder 31 is for pressure stepless action in described to be measured
In pile foundation 1.A kind of embodiment as shown in Figure 5, one of fixed position, since there are four auger stem 7 and four for setting
A pull rod 4 then mutually guarantees that pressure is transmitted more uniform in requisition for increasing secondary beam quantity, and secondary beam includes first secondary beam 32 and the
Two secondary beams 33, the second secondary beam 33 are equipped with two, and two second secondary beams 33 are connected and fixed with two pull rods 4 respectively, then are pressed onto first
On secondary beam 32, so that the tension uniform of fixation position formation is passed to girder 31；For another example another implementation shown in fig. 6
Example, one of fixed position, setting there are four auger stem 7 and four pull rods 4 but, as shown in fixed position ratio Fig. 5
Embodiment increases one times, so needing to increase secondary beam quantity to guarantee that pressure is transmitted more uniform, in two mutually closed on
In fixed position, secondary beam includes the first secondary beam 32, the second secondary beam 33 and third secondary beam 34, wherein the second secondary beam 33 is equipped with two,
Third secondary beam 34 is equipped with four, and two third secondary beams 34 are connected and fixed with two pull rods 4 respectively, then are pressed on the second secondary beam 33,
The second secondary beam 33 cooperation in two fixation positions closed on, then be pressed on the first secondary beam 32, so that the fixation position be formed
Tension uniform pass to girder 31.
Preferably, support pier 9 is set under girder 31, construction personnel is facilitated to set up pressure beam 3.
As shown in figs. 1 and 3,2 top of jack device is withstood on girder 31, and lower part is withstood in pile foundation 1 to be measured, jack dress
Set 2 be equipped with it is multiple, in order to facilitate jack device 2 apply pressure, between girder 31 and jack device 2 be provided with bearing plate
6；For the purposes of protecting pile foundation 1 to be measured, pile cover 5 is provided between pile foundation 1 to be measured and jack device 2.
The jack device 2 preferably uses the jack device 2 of electronics, and the jack device 2 of general electronics can be arranged
Pressure gauge can intuitively see the pressure value of jack device 2 for test group, by electric high pressure pump to jack device 2
Apply pressure, thus to treating peg base 1 by being generated in reaction force acts to pile foundation 1 to be measured under the action of pressure beam 3, thus
Complete the single pile vertical resistance pressure bearing capacity static test to treating peg base 1.
As shown in Fig. 2, the fixed connection structure of auger stem 7 and pull rod 4,7 top of auger stem is provided with connecting head 71,
For the connecting head 71 for fixing the pull rod 4, connecting head 71 includes fixed part 711 and movable part 712, movable part 712 and solid
Determine fixed by pin 73 between portion 711,711 inner hollow of fixed part, formed for the pull rod 4 receiving and fixed space,
The movable part 712 is equipped with hole and is inserted into fixation for pull rod 4, and pull rod 4 is at least in its part fixed with connecting head 71 equipped with spiral shell
Line fixing end, the threaded end are inserted into from the hole on movable part 712, then are fixed on the movable part by two nuts 88
On 712.
As shown in figure 4,7 lower part of auger stem is augers 72, the fixed part 71 and augers 72 are fixed
Connection, 72 outer surface of augers are equipped with fixed spiral；The fixed spiral is the fixed spiral of tooth form.
For the length for increasing auger stem 7, can also be arranged it is intermediate plug into drilling rod to extend the length of auger stem 7,
Plug into one end of drilling rod of centre is set as threaded end identical with pull rod 4, is fixed on the connecting head 71, in indirectly
Structure identical with the connecting head 71 is arranged in the other end for refuting drilling rod, connects for the connection of other intermediate drills or pull rod 4.
The displacement data in testing that pile foundation to be measured is recorded by test device, judges according to displacement data to test pile
Whether vertical bearing capacity is qualified, and the test device can be displacement sensor or accurate dial gauge.
A kind of single pile bearing capacity method, including pile foundation to be measured, auger stem, pull rod, pressure beam and thousand
Jin ejection device, further comprising the steps of:
The fixation position of auger stem is selected according to the position of pile foundation to be measured；
Auger stem is pierced in soil layer by piling machine and is fixed, the pull rod is fixed on the upper end of auger stem；
Pull rod is locked on the portion of pressure beam；
Jack device is set between the pressure beam and the pile foundation to be measured, is applied by jack device and is pressed
Power jacks up another part of the pressure beam, is cooperated by auger stem, pull rod and pressure beam to pile foundation to be measured and generates reaction
Power, to test the single pile vertical resistance pressure static load bearing capacity of pile foundation to be measured；
The displacement data in testing of pile foundation to be measured is recorded by test device.
According to the pile foundation vertical pressure-resistant static load test method of the application, by be arranged auger stem be fixed in soil layer with
The mode of reaction force tests pile foundation to be measured, compares with the vertical compression bearing capacity test method of existing pile foundation, this method
Without transporting a large amount of concrete bearing block, the expense of transport and equipment hoisting is saved, lifting is reduced and detection was tested
Security risk in journey effectively reduces the whole cost cost of engineering；In addition, the requirement to test site is also reduced,
Without selecting suitable engineering pile or in addition constructing concrete deadman, and it is to be measured to test relative to the anchoring pile that needs separately to construct
The test method of pile foundation, the present processes construction time is short, can will be a large amount of within the time of a couple of days by piling machine
Auger stem is pierced in soil layer and is fixed, and to form the basis of experiment, needs to wait 28 days to its pile body relative to concrete deadman
It could start to test after intensity is enough, the testing time can be greatly reduced, so as to shorten the test pile time of entire engineering, no
Influence the duration of engineering construction；And auger stem is recyclable and reusable device, can be avoided concrete anchor
Stake stays in soil layer, influences the construction in later period.
The fixed bit has installed multiple, and the quantity of the auger stem cooperates the quantity of the fixed position to be arranged, institute
The position for stating pile foundation to be measured is set to the center that each fixed position connects the polygon or line to be formed.By to fixation
The optimization of position, so that pile foundation to be measured can be formed in the center of the geometry of multiple fixed positions, i.e., so that pressure
The counter-force that beam is formed can be covered uniformly on the pile foundation to be measured, and test result caused by avoiding because of unbalance stress is inaccurate
Really, rollover event etc. occurs for test process.
The quantity of the auger stem is N times of the quantity of the fixed position, and the N is the natural number more than or equal to 1,
The auger stem is evenly distributed in the fixed position.When the test bearing capacity of need pile foundation to be measured to be tested is larger,
Can suitable auger stem for increasing each fixed position quantity, and in order to avoid the auger of each fixed position
There is the appearance of the case where unbalance stress in bar, is also uniformly distributed the auger stem of each fixed position, so that being fixed on auger
Pull rod on bar also can be uniformly distributed.
The quantity of auger stem can test bearing capacity according to the single-pile vertical orientation of pile foundation to be measured and go to determine, such as pile foundation to be measured
Vertical bearing capacity characteristic value Ra, single-pile vertical orientation is calculated according to the empirical relations such as the mechanics index of physics of foundation soil and carrying force parameter
Characteristic load bearing capacity, can press makes to calculate:
Ra=uqsa+qpaAp
Wherein, qsaFor the frictional resistance characteristic value of soil layer stake side, it can rule of thumb correspond to different soil layer selection differences and take
Value；
qpaFor bearing course at pile end end resistance characteristic value, different values equally can also be rule of thumb selected；
U is the perimeter of section of auger stem；
ApFor the area of section of auger stem.
It can the institute of the auger stem according to required for the single pile bearing capacity bearing capacity calculation of pile foundation to be measured
The perimeter of section and area of section needed, according to the perimeter of section and area of section being calculated, in conjunction with single auger stem
Perimeter of section and area of section, so that selection obtains the setting quantity of suitable auger stem to carry out testing experiment.
The pressure beam includes girder and secondary beam, and a part of the secondary beam or the secondary beam is fixedly connected with pull rod, should
Secondary beam is used for power stepless action in the girder, and the girder is for pressure stepless action in the pile foundation to be measured.
The auger stem includes augers and connecting head, and the augers is fixed for piercing soil layer, described
Connecting head with pull rod for connecting, so that pull rod is connected and fixed with auger stem.
It further include that centre is plugged into drilling rod, centre drilling rod of plugging into is set between the auger stem and pull rod, works as institute
State auger stem length it is inadequate when, the length of auger stem, the auger stem made and drawing are increased by centre drilling rod of plugging into
Bar keeps connection.When auger stem can not provide suitable frictional force by the soil layer that this body length is pierced, can pass through
Drilling rod is plugged into transmit the power of piling machine among increasing, and the length for extending auger stem enables auger stem to pierce
The soil layer of deeper provides bigger frictional force.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to of the invention
Some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (10)
1. a kind of single pile bearing capacity method, which is characterized in that including pile foundation to be measured, auger stem, pull rod, pressure
Beam and jack device, further comprising the steps of:
The fixation position of auger stem is selected according to the position of pile foundation to be measured；
Auger stem is pierced in soil layer by piling machine and is fixed, the pull rod is fixed on the upper end of auger stem；
Pull rod is locked on the portion of pressure beam；
Jack device is set between the pressure beam and the pile foundation to be measured, pressure, top are applied by jack device
The another part for playing the pressure beam is cooperated to pile foundation to be measured by auger stem, pull rod and pressure beam and generates reaction force, from
And test the single pile vertical resistance pressure bearing capacity of pile foundation to be measured；
The displacement data of pile foundation to be measured in testing is recorded by test device.
2. single pile bearing capacity method according to claim 1, which is characterized in that the fixed bit has installed
Multiple, the quantity of the auger stem cooperates the quantity of the fixed position to be arranged, and the position of the pile foundation to be measured is set to respectively
A fixed position connects the center for the polygon or line to be formed.
3. single pile bearing capacity method according to claim 2, which is characterized in that the number of the auger stem
Amount is N times of the quantity of the fixed position, and the N is the natural number more than or equal to 1, and the auger stem is evenly distributed in institute
State fixed position.
4. single pile bearing capacity method according to claim 3, which is characterized in that the pressure beam includes master
A part of beam and secondary beam, the secondary beam or the secondary beam is fixedly connected with pull rod, which is used for power stepless action in institute
It states on girder, the girder is for pressure stepless action in the pile foundation to be measured.
5. single pile bearing capacity method according to claim 1, which is characterized in that the auger stem includes
Augers and connecting head, the augers are fixed for piercing soil layer, and the connecting head is used to connect with pull rod, so that
Pull rod is connected and fixed with auger stem.
6. single pile bearing capacity method according to claim 5, which is characterized in that further include that centre is plugged into brill
Bar, centre drilling rod of plugging into are set between the auger stem and pull rod, when the auger stem length is inadequate, pass through
Centre drilling rod of plugging into increases the length of auger stem, and the auger stem made and pull rod keep connecting.
7. a kind of experimental rig using single pile bearing capacity method described in any one of claims 1-6, special
Sign is, including auger stem, pull rod, pressure beam and jack device, and the auger stem is pierced in soil layer and fixed, described
Pull rod is fixed on auger stem upper end, and pull rod is locked in a part of pressure beam, the jack device be set to
Between pile base and pressure beam.
8. experimental rig according to claim 7, which is characterized in that the auger stem includes augers and plugs into
Head, the augers outer surface are equipped with fixed spiral；The connecting head is for fixing the pull rod.
9. experimental rig according to claim 8, which is characterized in that the fixed spiral is the fixed spiral of tooth form.
10. experimental rig according to claim 8, which is characterized in that the pull rod lower end is equipped with threaded end, passes through
Pull rod is fixed on the connecting head by the threaded end.
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| CN201910631196.7A CN110295632A (en) | 2019-07-12 | 2019-07-12 | A kind of single pile bearing capacity method and its experimental rig |
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| CN201910631196.7A CN110295632A (en) | 2019-07-12 | 2019-07-12 | A kind of single pile bearing capacity method and its experimental rig |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119255A (en) * | 2019-12-23 | 2020-05-08 | 台州市椒江建设工程质量检测中心有限公司 | Pile foundation static load compression test device |
| CN113252461A (en) * | 2021-05-28 | 2021-08-13 | 江苏海通全过程工程咨询有限公司 | Hydraulic force application device for pile foundation static load test and application method thereof |
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