CN106480908A - A kind of mini pile horizontally loading test device and method - Google Patents
A kind of mini pile horizontally loading test device and method Download PDFInfo
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- CN106480908A CN106480908A CN201610929423.0A CN201610929423A CN106480908A CN 106480908 A CN106480908 A CN 106480908A CN 201610929423 A CN201610929423 A CN 201610929423A CN 106480908 A CN106480908 A CN 106480908A
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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
Abstract
A kind of mini pile horizontally loading test device and method, device includes datum line beam, Magnetic gauge stand, displacement transducer, π shape steel plate, pile crown fixing nut, the first fixed support, levelling tube, hydraulic jack, the first force transmission shaft, liftable bearing, counterforce device end plate, oil inlet pipe, the first L-type steel plate, load sensor, the second L-type steel plate, the 3rd force transmission shaft and the second fixed support, and hydraulic jack holds up fixation with the first L-type steel plate being arranged at its two ends and the first fixed support and liftable bearing；Load sensor holds up fixation with the second L-type steel plate being arranged at its two ends and the second fixed support and liftable bearing, and load sensor passes through the 3rd force transmission shaft and connects counterforce device end plate.The transmission of present invention power in mini pile horizontally loading test fully horizontally, can accurately detect the horizontal displacement at mini pile stake end, installs easy to adjust, support with adjustable height, the pile crown of suitable arbitrary height, can carry out double stake tests simultaneously.
Description
Technical field
The present invention relates to pile detection field is and in particular to a kind of mini pile horizontally loading test device and method.
Background technology
Mini pile refers to that diameter is less than the stake of 300mm, and under usual conditions, mini pile diameter is between 70～300mm, slenderness ratio
More than 30, using the armored concrete in situ pile of auger bore, strong arrangement of reinforcement and slip casing by pressure technique pile.Due to miniature
The technology of stake is simple, and easy construction has developed rapidly in recent years, has been widely used in various civil construction projects, such as building
Basic underpins, deep excavation pattern foundation pit supporting structure, preventing and treating on stable and landslide of diaphram wall wall ditch etc..Apply in landslide control etc.
In, mini pile is primarily subjected to the effect of horizontal loading, and the therefore determination of horizontal bearing capacity is often the key of engineering design.Miniature
Stake pile strength is relatively low, and pile body bending rigidity is less, easily bends, Horizontal Displacement is larger.At present, mini pile carries spy
The aspects such as property is tested at the scene, theory analysis, engineering design are achieved with certain achievement, but in-situ horizontal test device and method
Still have several drawbacks：(1) install and place the method for cushion block it cannot be guaranteed that institute in lower section when loading system and load sensor etc.
There is device fully horizontally and stable；(2) field experimentation device is heavier, and balance adjustment is relatively difficult；(3) general device is only suitable for
In single pile horizontal checkout.
Content of the invention
The technical problem to be solved in the present invention is, for making up the deficiency of existing level method of testing, provides a kind of new micro-
Type stake horizontal addload and the device and method of test, the transmission of power during mini pile horizontally loading test fully horizontally, can be accurate
Detect the horizontal displacement at mini pile stake end, device installs easy to adjust, support with adjustable height, the stake of suitable arbitrary height
Head, can carry out double stake tests simultaneously.
The present invention be employed technical scheme comprise that by solving above-mentioned technical problem：
A kind of mini pile horizontally loading test device, including datum line beam, Magnetic gauge stand, displacement transducer, π shape steel plate, stake
Head fixing nut, the first fixed support, levelling tube, hydraulic jack, the first force transmission shaft, liftable bearing, counterforce device end plate,
Oil inlet pipe, the first L-type steel plate, load sensor, the second L-type steel plate, the 3rd force transmission shaft and the second fixed support, Magnetic gauge stand sets
Stand on datum line beam, π shape steel plate is fixed on test pile by pile crown fixing nut, pile crown fixing nut is set in test pile stake end,
Pile crown fixing nut and π shaped steel plate weld, one end of displacement transducer is fixed on Magnetic gauge stand, the other end and π shape steel plate
Plate face is in close contact, and π shape steel plate is provided with preformed hole, and the left end of the first force transmission shaft is hinged at this preformed hole with π shape steel plate (to be protected
The level transmission of card power)；
Hydraulic jack is with the first L-type steel plate being arranged at its two ends and the first fixed support and liftable bearing
Hold up and fix, by liftable seat supports (liftable height of support can be adjusted as needed) below two piece of first L-type steel plate；
The right-hand member of the first force transmission shaft passes through the first L-type steel plate in left side to extend into the reserving hole of hydraulic jack left end, and by solid
Determine bolt to be fixedly connected；Right side the first L-type steel plate affixed with one end of the second force transmission shaft, the other end of the second force transmission shaft with bear
One end of lotus sensor is connected, and load sensor is by the second L-type steel plate being arranged at its two ends and the second fixed support and can
Lifting support cooperation holds up to be fixed, and (can be adjusted as needed and can rise by liftable seat supports below two piece of second L-type steel plate
Fall height of support), the other end of load sensor passes through the 3rd force transmission shaft and connects counterforce device end plate.
By such scheme, described first force transmission shaft, the second force transmission shaft, the 3rd force transmission shaft, hydraulic jack, load sensor
On be provided with levelling tube.
By such scheme, described first fixed support includes the first spiral and the first nut, and the first spiral is worn
Cross hydraulic pressure thousand after the preformed hole between the two piece of first L-type steel plate in left and right by the first nut outside two piece of first L-type steel plate
Jin top is tightened in it.
By such scheme, described second fixed support includes the second spiral and the second nut, and the second spiral is worn
By the second nut outside two piece of second L-type steel plate, load is passed after crossing the preformed hole between the two piece of second L-type steel plate in left and right
Sensor is tightened in it.
By such scheme, described π shape steel plate is welded by three blocks of steel plates.
By such scheme, described first L-type steel plate, the second L-type steel plate are respectively used to bearing hydraulic jack and load passes
Sensor；First L-type steel plate, the second L-type steel plate are respectively by four liftable seat supports.
By such scheme, described datum line beam is shaped steel.
By such scheme, the counter-force that during single pile test, described counterforce device end plate provides is more than horizontal addload during test；
During double tests, counterforce device end plate is using the test pile being made up of pile crown fixing nut, π shape steel plate and displacement transducer, datum line beam
Horizontal survey part is replaced.
Present invention also offers a kind of method that above-mentioned static-load testing device carries out mini pile horizontal checkout, walk including following
Suddenly：
1) datum mark is chosen according to test site condition, datum line beam is set, the length of datum line beam according to the position of test pile Lai
Determine, its rise-span ratio is not less than 1/40, and datum line beam and test pile distance are not less than 4 times of test pile diameters；
2) Magnetic gauge stand is arranged on datum line beam；
3) size according to test pile diameter selects pile crown fixing nut, and it with π shaped steel plate weld and is fixed on pile crown；
4) reinforcing bar is passed through π shape steel plate preformed hole and the first force transmission shaft left end preformed hole, and use nut outside π shape steel plate
Fixing；
5) two first spirals are parallel across the preformed hole of left and right two panels the first L-type steel plate and solid with the first nut
Fixed, so that them is connected as a single entity, four only lifting supports are each passed through the preformed hole of two panels the first L-type steel plate bottom arm of angle and are used in combination
Hydraulic jack is supported nut by fixation up and down, and the first force transmission shaft right-hand member passes through the first L-type steel plate in left side to extend into liquid
The reserving hole of pressure jack left end, and be fixedly connected using fixing bolt；
6) with fixed hydraulic jack identical method firm demand sensor, the second spiral is parallel across left and right
The preformed hole of two panels the second L-type steel plate is simultaneously fixed with the second nut, the second force transmission shaft left end in advance and right side the first L-type steel plate
It is welded, the second force transmission shaft right-hand member passes through the reserved hole position of the second L-type steel plate in left side to be connected with load sensor left end, the 3rd biography
Power axle left end passes through the second L-type steel plate on right side to reserve hole position to be connected with load sensor right-hand member, the 3rd force transmission shaft right-hand member and instead
Power apparatus end plate connection, counterforce device end plate withstands on can be provided on the works of counter-force；
7) oil inlet pipe is connected with the controller of hydraulic jack, load sensor is connected with computer, determines all
Equipment normal work；
8) adjust liftable bearing height make the first force transmission shaft, the second force transmission shaft, the 3rd force transmission shaft, hydraulic jack,
Level tube bubble on load sensor (keeping package unit levelness) placed in the middle；
9) displacement transducer is fixed on Magnetic gauge stand, and whether test the probe of displacement transducer tight with π shape steel plate
Contiguity is touched；
10) control the oil inlet quantity of oil inlet pipe by hydraulic jack controller, test pile is carried out with horizontal mipmap loading, load
Process is according to test pile size and purposes reference《Architecture foundation pile inspection specifications》Given graded loading way is implemented；
11) after horizontal distortion produced by test pile every one-level horizontal addload is stable, read displacement transducer and load passes
The reading of sensor, and make a record, then start next stage and load；
12) basis《Architecture foundation pile inspection specifications》Given termination horizontal addload standard, stops loading, is then classified
Unloading, until horizontal addload returns to 0；
13) after the completion of testing, remove horizontally loading test device, be easy to reuse.
Beneficial effects of the present invention：
1st, because mini pile diameter is less, can provide 4 even more multiposition that displacement biography is installed using the application device
Sensor, thus when can record differing heights pile crown displacement, obtain more test results；
2nd, setting levelling tube can guarantee that the fully horizontal of whole horizontally loading test device, and the transmission loading direction of power is complete
Level, can detect the horizontal displacement at mini pile stake end exactly, make measurement result more accurate；
The 3rd, liftable bearing, support with adjustable height, the pile crown of suitable arbitrary height are set, make the balance adjustment of device more
Plus it is convenient, simple；
4th, general static-load testing device is only applicable to single pile horizontal checkout, and the application can carry out double stake tests simultaneously, and
Repacking is very simple, and the suitability is wide；
5th, whole device structure is more stable, easy installation and removal, and reliability is high.
Brief description
Fig. 1 is the single unit system structural representation of embodiment of the present invention single pile horizontal checkout；
Fig. 2 is the single unit system structure schematic top plan view of embodiment of the present invention single pile horizontal checkout；
Fig. 3 is the single unit system structural representation of the double stake horizontal checkout of the embodiment of the present invention；
Fig. 4 is the single unit system structure schematic top plan view of the double stake horizontal checkout of the embodiment of the present invention；
In figure:1- datum line beam, 2- Magnetic gauge stand, 3- displacement transducer, 4- π shape steel plate, 5- fixing nut, 6- first is fixing
Support, 7- levelling tube, 8- hydraulic jack, 9- first force transmission shaft, 10- liftable bearing, 11- counterforce device end plate, 12- oil-feed
Pipe, 13- second force transmission shaft, 14- the first L-type steel plate, 15- load sensor, 16- fixing bolt, 17- the second L-type steel plate, 18-
3rd force transmission shaft, 19- second fixed support.
Specific embodiment
With example, technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Fig. 1～2, during single pile horizontal checkout, mini pile horizontally loading test device of the present invention, including base
Quasi- beam 1, Magnetic gauge stand 2, displacement transducer 3, π shape steel plate 4, pile crown fixing nut 5, the first fixed support 6, levelling tube 7, hydraulic pressure
Jack 8, the first force transmission shaft 9, liftable bearing 10, counterforce device end plate 11 (counterforce device end plate 11 during double horizontal checkouts
Undertaken by another test pile, as shown in Fig. 3～Fig. 4), oil inlet pipe 12, the first L-type steel plate 14, load sensor 15, the second L-type steel
Plate 17, the 3rd force transmission shaft 18 and the second fixed support 19, Magnetic gauge stand 2 is built up on datum line beam 1, and it is solid that π shape steel plate 4 passes through pile crown
Determine nut 5 to be fixed on test pile, pile crown fixing nut 5 is set in test pile stake end, pile crown fixing nut 5 is welded with π shape steel plate 4,
One end of displacement transducer 3 is fixed on Magnetic gauge stand 2, the plate face of the other end and π shape steel plate 4 is in close contact, on π shape steel plate 4
It is provided with preformed hole, the left end of the first force transmission shaft 9 hinged at this preformed hole with π shape steel plate 4 (ensureing the level transmission of power)；
Hydraulic jack 8 is by the first L-type steel plate 14 being arranged at its two ends and the first fixed support 6 and liftable bearing
10 cooperations hold up to be fixed, and the first fixed support 6 includes the first spiral and the first nut, and the first spiral passes through left and right two
Pass through first nut in two piece of first L-type steel plate 14 outside by hydraulic jack 8 after preformed hole between block the first L-type steel plate 14
It is tightened in it, supported by four liftable bearings 10 below two piece of first L-type steel plate 14 and (liftable can be adjusted as needed
Bearing 10 height)；The right-hand member of the first force transmission shaft 9 passes through the first L-type steel plate 14 in left side to extend into the pre- of hydraulic jack 8 left end
Box out hole, and be fixedly connected by fixing bolt 16；The first L-type steel plate 14 on right side is affixed with one end of the second force transmission shaft 13,
The other end of the second force transmission shaft 13 is connected with one end of load sensor 15, the same hydraulic jack of fixing meanss of load sensor 15
Top 8, specially：Load sensor 15 by the second L-type steel plate 14 being arranged at its two ends and the second fixed support 19 and can rise
Descending branch seat 10 cooperation holds up to be fixed, and the second fixed support 19 includes the second spiral and the second nut, and the second spiral is worn
To be born by second nut in two piece of second L-type steel plate 17 outside after crossing the preformed hole between the two piece of second L-type steel plate 17 in left and right
Lotus sensor 15 is tightened in it, and being supported by four liftable bearings 10 below two piece of second L-type steel plate 17 (can be as needed
Adjust liftable bearing 10 height), the other end of load sensor 15 connects counterforce device end plate 11 by the 3rd force transmission shaft 18.
It is all provided with first force transmission shaft 9, the second force transmission shaft 13, the 3rd force transmission shaft 18, hydraulic jack 8, load sensor 15
Put levelling tube 7.
Do single pile horizontal checkout experiment using said apparatus and generally require 3, pile crown fixation spiral shell of four displacement transducers
Mother 5 and eight liftable bearings 10.
With reference to shown in Fig. 3～Fig. 4, during double tests, other structures are identical with single pile test, are by the right side in place of unique difference
The counterforce device end plate 11 of side be substituted for same left side by pile crown fixing nut 5, π shape steel plate 4 and displacement transducer 3, datum line beam 1
The test pile horizontal survey part constituting, does double stake horizontal checkout experiments and generally requires 3, two pile crowns fixation spiral shells of eight displacement transducers
Mother 5 and eight liftable bearings 10.
During use, method that mini pile horizontal checkout is carried out using static-load testing device of the present invention, comprise the following steps：
Embodiment 1 (application of single pile horizontally loading test device), as shown in Figure 1, 2：
1) datum mark is chosen according to test site condition, datum line beam 1 is set, the length of datum line beam 1 is according to the position of test pile
To determine, as far as possible long, but its rise-span ratio is not preferably less than 1/40, and datum line beam 1 and test pile distance are not less than 4 times of test pile diameters；
2) Magnetic gauge stand 2 is arranged on datum line beam 1；
3) size according to test pile diameter selects pile crown fixing nut 5, and itself and π shape steel plate 4 are welded and be fixed on pile crown；
4) reinforcing bar is passed through π shape steel plate 4 preformed hole and the first force transmission shaft 9 left end preformed hole, and use in π shape steel plate 4 outside
Nut is fixed；
5) two first spirals parallel across the preformed hole of left and right two panels the first L-type steel plate 14 and are used the first nut
Fixing, so that them is connected as a single entity, four only lifting supports 10 are each passed through the reserved of two panels the first L-type steel plate 14 bottom arm of angle
Kong Bingyong nut is fixed up and down and integrated support described above is got up, with fixed hydraulic jack 8, the first force transmission shaft 9 right-hand member
The first L-type steel plate 14 through left side extend into the reserving hole of hydraulic jack 8 left end, and fixing even using fixing bolt 16
Connect；
6) with fixed hydraulic jack 8 identical method firm demand sensor 15, the second spiral parallel across
The preformed hole of left and right two panels the second L-type steel plate 17 is simultaneously fixed with the second nut, the second force transmission shaft 13 left end in advance and right side the
One L-type steel plate 14 is welded, and the second force transmission shaft 13 right-hand member passes through the second L-type steel plate 17 in left side to reserve hole position and load sensor
15 left ends connect, and the 3rd force transmission shaft 18 left end passes through the second L-type steel plate 17 on right side to reserve hole position and load sensor 15 right-hand member
Connect, the 3rd force transmission shaft 18 right-hand member is connected with counterforce device end plate 11, and counterforce device end plate withstands on the structure that can provide counter-force
On thing；
7) controller of oil inlet pipe 12 and hydraulic jack 8 is connected, load sensor 15 and computer is connected,
Determine all devices normal work；
8) height adjusting liftable bearing 10 makes the first force transmission shaft 9, the second force transmission shaft 13, the 3rd force transmission shaft 18, hydraulic pressure
Levelling tube 7 bubble on jack 8, load sensor 15 (keeping package unit levelness) placed in the middle；
9) displacement transducer 3 is fixed on Magnetic gauge stand 2, and test the probe of displacement transducer 3 whether with π shape steel plate
4 close contacts；
10) control the oil inlet quantity of oil inlet pipe 12 by hydraulic jack 8 controller, horizontal mipmap loading carried out to test pile,
Loading procedure is according to test pile size and purposes reference《Architecture foundation pile inspection specifications (JGJ106-2014)》Given classification adds
Load mode is implemented；
11) after horizontal distortion produced by test pile every one-level horizontal addload is stable, read displacement transducer 3 and load passes
The reading of sensor 15, and make a record, then start next stage and load；
12) basis《Architecture foundation pile inspection specifications (JGJ106-2014)》Given termination horizontal addload standard, stops
Load, then load shedding, until horizontal addload returns to 0；
13) after the completion of testing, remove horizontally loading test device, be easy to reuse.
Embodiment 2 (applications of double horizontally loading test devices), as shown in Figure 3,4：
1) datum mark is chosen according to test site condition, datum line beam 1 is set, the length of datum line beam 1 is according to the position of test pile
To determine, as far as possible long, but its rise-span ratio is not preferably less than 1/40, and datum line beam 1 with test pile distance otherwise is less than 4 times of test pile diameters；
2) Magnetic gauge stand 2 is arranged on datum line beam 1；
3) size according to left side test pile diameter selects pile crown fixing nut 5, it is welded with π shape steel plate 4 and is fixed on
Pile crown；
4) reinforcing bar is passed through π shape steel plate 4 preformed hole and the first force transmission shaft 9 left end preformed hole, and use in π shape steel plate 4 outside
Nut is fixed；
5) two first spirals parallel across the preformed hole of left and right two panels the first L-type steel plate 14 and are used the first nut
Fixing, so that them is connected as a single entity, four only lifting supports 10 are each passed through the reserved of two panels the first L-type steel plate 14 bottom arm of angle
Kong Bingyong nut is fixed up and down and integrated support described above is got up, with fixed hydraulic jack 8, the first force transmission shaft 9 right-hand member
The first L-type steel plate 14 through left side extend into the reserving hole of hydraulic jack 8 left end, and fixing using fixing bolt 16；
6) with fixed hydraulic jack 8 identical method firm demand sensor 15, the second spiral parallel across
The preformed hole of left and right two panels the second L-type steel plate 17 is simultaneously fixed with the second nut, the second force transmission shaft 13 left end in advance and right side the
One L-type steel plate 14 is welded, and the second force transmission shaft 13 right-hand member passes through the second L-type steel plate 17 in left side to reserve hole position and load sensor
15 left ends connect, and the 3rd force transmission shaft 18 left end passes through the second L-type steel plate 17 on right side to reserve hole position and load sensor 15 right-hand member
Connect, the 3rd force transmission shaft 18 right-hand member passes through π shape steel plate 4, pile crown fixing nut 5 is connected with right side test pile；It is identical with left side test pile,
Right side test pile is respectively provided with datum line beam 1 and displacement transducer 3, and datum line beam 1 arranges Magnetic gauge stand 2；
7) controller of oil inlet pipe 12 and hydraulic jack 8 is connected, load sensor 15 and computer is connected,
Determine all devices normal work；
8) height adjusting liftable bearing 10 makes the first force transmission shaft 9, the second force transmission shaft 13, the 3rd force transmission shaft 18, hydraulic pressure
Levelling tube 7 bubble on jack 8, load sensor 15 (keeping package unit levelness) placed in the middle；
9) displacement transducer 3 is fixed on Magnetic gauge stand 2, and test the probe of displacement transducer 3 whether with π shape steel plate
4 close contacts；
10) control the oil inlet quantity of oil inlet pipe 12 by hydraulic jack 8 controller, horizontal mipmap loading carried out to test pile,
Loading procedure is according to test pile size and purposes reference《Architecture foundation pile inspection specifications (JGJ106-2014)》Given classification adds
Load mode is implemented；
11) after horizontal distortion produced by test pile every one-level horizontal addload is stable, read displacement transducer 3 and load passes
The reading of sensor 15, and make a record, then start next stage and load；
12) basis《Architecture foundation pile inspection specifications (JGJ106-2014)》Given termination horizontal addload standard, stops
Load, then load shedding, until horizontal addload returns to 0；
13) after the completion of testing, remove horizontally loading test device, be easy to reuse.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and is not to the present invention
The restriction of embodiment.Such as 4 even more multiposition installation positions can be provided using the pile crown attachment means that this patent provides
Displacement sensor.For those of ordinary skill in the field, the obvious change that spirit under this invention is extended out
Change or change among still in protection scope of the present invention.
Claims (9)
1. a kind of mini pile horizontally loading test device is it is characterised in that include datum line beam, Magnetic gauge stand, displacement transducer, π
Shape steel plate, pile crown fixing nut, the first fixed support, levelling tube, hydraulic jack, the first force transmission shaft, liftable bearing, counter-force
Device end plate, oil inlet pipe, the first L-type steel plate, load sensor, the second L-type steel plate, the 3rd force transmission shaft and the second fixed support,
Magnetic gauge stand is built up on datum line beam, and π shape steel plate is fixed on test pile by pile crown fixing nut, and pile crown fixing nut is set in
Test pile stake end, pile crown fixing nut and π shaped steel plate weld, one end of displacement transducer is fixed on Magnetic gauge stand, the other end and π
The plate face of shape steel plate is in close contact, and π shape steel plate is provided with preformed hole, and the left end of the first force transmission shaft and π shape steel plate are in this preformed hole
Place is hinged；
Hydraulic jack holds up with the first L-type steel plate being arranged at its two ends and the first fixed support and liftable bearing
Fixing, by liftable seat supports below two piece of first L-type steel plate；The right-hand member of the first force transmission shaft passes through first L-type steel in left side
Plate extend into the reserving hole of hydraulic jack left end, and is fixedly connected by fixing bolt；The first L-type steel plate on right side and the
One end of two force transmission shafts is affixed, and the other end of the second force transmission shaft is connected with one end of load sensor, and load sensor is by arranging
In the second L-type steel plate and the second fixed support and the cooperation picking-up fixation of liftable bearing at its two ends, two piece of second L-type steel plate
Lower section is passed through the 3rd force transmission shaft and is connected counterforce device end plate by liftable seat supports, the other end of load sensor.
2. mini pile horizontally loading test device according to claim 1 it is characterised in that described first force transmission shaft,
It is provided with levelling tube on two force transmission shafts, the 3rd force transmission shaft, hydraulic jack, load sensor.
3. mini pile horizontally loading test device according to claim 1 is it is characterised in that described first fixed support bag
Include the first spiral and the first nut, the first spiral is logical through after the preformed hole the L-type steel plate of two piece first of left and right
Cross the first nut outside two piece of first L-type steel plate hydraulic jack is tightened in it.
4. mini pile horizontally loading test device according to claim 1 is it is characterised in that described second fixed support bag
Include the second spiral and the second nut, the second spiral is logical through after the preformed hole the L-type steel plate of two piece second of left and right
Cross the second nut outside two piece of second L-type steel plate load sensor is tightened in it.
5. mini pile horizontally loading test device according to claim 1 is it is characterised in that described π shape steel plate is by three pieces
Steel plate is welded.
6. mini pile horizontally loading test device according to claim 1 it is characterised in that described first L-type steel plate,
Two L-type steel plates are respectively used to bearing hydraulic jack and load sensor；First L-type steel plate, the second L-type steel plate are respectively by four
Liftable seat supports.
7. mini pile horizontally loading test device according to claim 1 is it is characterised in that described datum line beam is shaped steel.
8. mini pile horizontally loading test device according to claim 1 it is characterised in that single pile test when described counter-force
The counter-force that device end plate provides is more than horizontal addload during test；During double tests, counterforce device end plate fixes spiral shell using by pile crown
The test pile horizontal survey part that mother, π shape steel plate and displacement transducer, datum line beam are constituted is replaced.
9. according to claim 1～8 one of arbitrarily described in mini pile horizontally loading test device carry out mini pile horizontal checkout
Method it is characterised in that comprising the following steps：
1) datum mark is chosen according to test site condition, datum line beam is set, the length of datum line beam determines according to the position of test pile,
Its rise-span ratio is not less than 1/40, and datum line beam and test pile distance are not less than 4 times of test pile diameters；
2) Magnetic gauge stand is arranged on datum line beam；
3) size according to test pile diameter selects pile crown fixing nut, and it with π shaped steel plate weld and is fixed on pile crown；
4) reinforcing bar is passed through π shape steel plate preformed hole and the first force transmission shaft left end preformed hole, and solid with nut outside π shape steel plate
Fixed；
5) two first spirals are fixed parallel across the preformed hole of left and right two panels the first L-type steel plate and with the first nut,
So that them is connected as a single entity, four only lifting supports are each passed through the preformed hole of two panels the first L-type steel plate bottom arm of angle and use spiral shell
Hydraulic jack is supported mother by fixation up and down, and the first force transmission shaft right-hand member passes through the first L-type steel plate in left side to extend into hydraulic pressure
The reserving hole of jack left end, and be fixedly connected using fixing bolt；
6) with fixed hydraulic jack identical method firm demand sensor, the second spiral is parallel across left and right two panels
The preformed hole of the second L-type steel plate is simultaneously fixed with the second nut, the second force transmission shaft left end in advance and right side the first L-type steel plate weld
Good, the second force transmission shaft right-hand member passes through the reserved hole position of the second L-type steel plate in left side to be connected with load sensor left end, the 3rd force transmission shaft
Left end passes through the reserved hole position of the second L-type steel plate on right side to be connected with load sensor right-hand member, and the 3rd force transmission shaft right-hand member is filled with counter-force
Put end plate connection, counterforce device end plate withstands on can be provided on the works of counter-force；
7) oil inlet pipe is connected with the controller of hydraulic jack, load sensor is connected with computer, determines all devices
Normal work；
8) height adjusting liftable bearing makes the first force transmission shaft, the second force transmission shaft, the 3rd force transmission shaft, hydraulic jack, load
Level tube bubble on sensor is placed in the middle；
9) displacement transducer is fixed on Magnetic gauge stand, and tests whether the probe of displacement transducer is closely connect with π shape steel plate
Touch；
10) control the oil inlet quantity of oil inlet pipe by hydraulic jack controller, horizontal mipmap loading, loading procedure are carried out to test pile
According to test pile size and purposes reference《Architecture foundation pile inspection specifications》Given graded loading way is implemented；
11) after horizontal distortion produced by test pile every one-level horizontal addload is stable, displacement transducer and load sensor are read
Reading, and make a record, then start next stage and load；
12) basis《Architecture foundation pile inspection specifications》Given termination horizontal addload standard, stops loading, and then classification is unloaded
Carry, until horizontal addload returns to 0；
13) after the completion of testing, remove horizontally loading test device, be easy to reuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610929423.0A CN106480908B (en) | 2016-10-31 | 2016-10-31 | A kind of mini pile horizontally loading test device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610929423.0A CN106480908B (en) | 2016-10-31 | 2016-10-31 | A kind of mini pile horizontally loading test device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106480908A true CN106480908A (en) | 2017-03-08 |
| CN106480908B CN106480908B (en) | 2018-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610929423.0A Active CN106480908B (en) | 2016-10-31 | 2016-10-31 | A kind of mini pile horizontally loading test device and method |
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| CN109372034A (en) * | 2018-09-25 | 2019-02-22 | 大连理工大学 | On pull out during suction bucket basic internal failure mechanism experimental rig and method |
| CN110541438A (en) * | 2019-09-27 | 2019-12-06 | 兰州交通大学 | Anti-slide pile horizontal load test device and method for measuring proportionality coefficient |
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| CN110541438A (en) * | 2019-09-27 | 2019-12-06 | 兰州交通大学 | Anti-slide pile horizontal load test device and method for measuring proportionality coefficient |
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| CN106480908B (en) | 2018-06-08 |
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