CN106480908B - 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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- CN106480908B CN106480908B CN201610929423.0A CN201610929423A CN106480908B CN 106480908 B CN106480908 B CN 106480908B CN 201610929423 A CN201610929423 A CN 201610929423A CN 106480908 B CN106480908 B CN 106480908B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
A kind of mini pile horizontally loading test device and method, device includes datum line beam, Magnetic gauge stand, displacement sensor, π shape steel plates, pile crown fixing nut, the first fixing bracket, 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, third force transmission shaft and the second fixing bracket, and hydraulic jack is fixed from being set to hold up with the first L-type steel plate at its both ends and the first fixing bracket and liftable bearing；Load sensor is fixed from being set to hold up with the second L-type steel plate at its both ends and the second fixing bracket and liftable bearing, and load sensor passes through third power transmission axis connection counterforce device end plate.The transmission of present invention power in mini pile horizontally loading test is fully horizontal, can accurately detect the horizontal displacement at mini pile stake end, and installation and adjustment are convenient, support with adjustable height, are suitble to the pile crown of arbitrary height, can be carried out at the same time double stake tests.
Description
Technical field
The present invention relates to pile detection fields, 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 mini pile diameter is between 70~300mm, slenderness ratio under usual conditions
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
Stake it is technically simple, it is easy for construction, rapidly developed in recent years, be widely used in various civil construction projects, such as building
Basis underpins, deep excavation pattern foundation pit supporting structure, the stabilization of diaphram wall wall ditch and the prevention on landslide etc..In applications such as landslide controls
In, mini pile is primarily subjected to the effect of horizontal loading, therefore the key of the determining often engineering design of horizontal bearing capacity.It is miniature
Stake body intensity is relatively low, and pile body bending stiffness is smaller, easily bends, Horizontal Displacement is larger.At present, mini pile carrying is special
Property is tested at the scene, theory analysis, engineering design etc. have achieved certain achievement, but in-situ horizontal test device and method
It still has several drawbacks：(1) method for placing cushion block in lower section whens loading system and load sensor etc. is installed and cannot be guaranteed institute
There is device fully horizontally and stablize；(2) field experiment device is heavier, and balance adjustment is relatively difficult；(3) general device is only applicable in
In single pile horizontal checkout.
Invention content
The technical problem to be solved by the present invention is to make up the deficiency of existing level test method, provide a kind of novel micro-
Type stake horizontal addload and the device and method of test, the transmission of power is fully horizontal during mini pile horizontally loading test, can be accurate
Ground detects the horizontal displacement at mini pile stake end, and device installation and adjustment are convenient, support with adjustable height, is suitble to the stake of arbitrary height
Head can be carried out at the same time double stake tests.
The used to solve above-mentioned technical problem technical solution of the present invention is：
A kind of mini pile horizontally loading test device, including datum line beam, Magnetic gauge stand, displacement sensor, π shape steel plates, stake
Head fixing nut, the first fixing bracket, 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, third force transmission shaft and the second fixing bracket, Magnetic gauge stand are set
It standing on datum line beam, π shape steel plates are fixed on by pile crown fixing nut on test pile, and pile crown fixing nut is set in test pile stake end,
Pile crown fixing nut and π shape steel plates weld, and one end of displacement sensor is fixed on Magnetic gauge stand, the other end and π shape steel plates
Plate face is in close contact, and π shape steel plates are equipped with preformed hole, left end and the π shape steel plates (guarantor hinged at the preformed hole of the first force transmission shaft
It demonstrate,proves the horizontal of power to transmit)；
Hydraulic jack is from being set to the first L-type steel plate and the first fixing bracket and liftable bearing at its both ends
It holds up and fixes, by liftable seat supports (liftable height of support can be adjusted as needed) below two piece of first L-type steel plate；
The right end of 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 passes through solid
Determine bolt to be fixedly connected；One end of the first L-type steel plate and the second force transmission shaft on right side is affixed, and the other end of the second force transmission shaft is with bearing
One end of lotus sensor is connected, and load sensor is by being set to the second L-type steel plate at its both ends and the second fixing bracket and can
Lifting support cooperation, which is held up, to be fixed, and by liftable seat supports, (can adjust as needed can rise below two piece of second L-type steel plate
Height of support drops), the other end of load sensor passes through third power transmission axis connection counterforce device end plate.
By said program, first force transmission shaft, the second force transmission shaft, third force transmission shaft, hydraulic jack, load sensor
On be provided with levelling tube.
By said program, first fixing bracket includes the first spiral and the first nut, and the first spiral is worn
It crosses hydraulic pressure thousand after the preformed hole between the two piece of first L-type steel plate in left and right through the first nut on the outside of two piece of first L-type steel plate
Jin top is tightened in it.
By said program, second fixing bracket includes the second spiral and the second nut, and the second spiral is worn
Load is passed by the second nut on the outside of two piece of second L-type steel plate after the preformed hole crossed between the two piece of second L-type steel plate in left and right
Sensor is tightened in it.
By said program, the π shape steel plates are welded by three blocks of steel plates.
By said program, the 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 said program, the datum line beam is shaped steel.
By said program, the single pile counter-force that the counterforce device end plate provides when testing is more than horizontal addload during test；
Counterforce device end plate uses the test pile being made of pile crown fixing nut, π shape steel plates and displacement sensor, datum line beam during double tests
Horizontal measurement part is replaced.
The present invention also provides a kind of method that above-mentioned static-load testing device carries out mini pile horizontal checkout, including following step
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 come
It determines, rise-span ratio is not less than 1/40, and datum line beam is not less than 4 times of test pile diameters with test pile distance；
2) Magnetic gauge stand is set on datum line beam；
3) pile crown fixing nut is selected according to the size of test pile diameter, it with π shape steel plates is welded and is fixed on pile crown；
4) reinforcing bar is passed through into π shape steel plates preformed hole and the first force transmission shaft left end preformed hole, and nut is used on the outside of π shape steel plates
It is fixed；
5) two first spirals are consolidated parallel across the preformed hole of left and right two panels the first L-type steel plate and with the first nut
It is fixed, them is made to be 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
Fixation supports hydraulic jack to nut up and down, and the first force transmission shaft right end passes through the first L-type steel plate in left side to extend into liquid
The reserving hole of jack left end is pressed, and is fixedly connected using fixing bolt；
6) with the method firm demand sensor identical with fixed hydraulic jack, 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 with the first L-type steel plate on right side
It is welded, the second force transmission shaft right end passes through the second L-type steel plate preformed hole position in left side to be connect with load sensor left end, and third passes
Power axis left end pass through right side the second L-type steel plate preformed hole position connect with load sensor right end, third force transmission shaft right end and instead
Power apparatus end plate connection, counterforce device end plate, which is withstood on, to be provided on the works of counter-force；
7) oil inlet pipe and the controller of hydraulic jack are connected, load sensor is connected with computer, is determined all
Equipment works normally；
8) adjust liftable bearing height make the first force transmission shaft, the second force transmission shaft, third force transmission shaft, hydraulic jack,
Level tube bubble on load sensor is (keeping package unit levelness) placed in the middle；
9) displacement sensor is fixed on Magnetic gauge stand, and whether the probe for testing displacement sensor is tight with π shape steel plates
Contiguity is touched；
10) oil inlet quantity of oil inlet pipe is controlled by hydraulic jack controller, horizontal mipmap loading, loading are carried out to test pile
Process is referred to according to test pile size and purposes《Architecture foundation pile inspection specifications》Given graded loading way is implemented；
11) it after test pile is per horizontal distortion is stablized caused by level-one horizontal addload, reads displacement sensor and load passes
The reading of sensor, and make a record, then start next stage loading；
12) basis《Architecture foundation pile inspection specifications》Given termination horizontal addload standard stops loading, is then classified
Unloading, until horizontal addload is restored to 0；
13) after the completion of testing, horizontally loading test device is removed, convenient for reusing.
Beneficial effects of the present invention：
1st, since mini pile diameter is smaller, 4 even more position installation displacements can be provided using the application device and passed
Sensor, the displacement of pile crown, obtains more test results during so as to measure different height；
2nd, setting levelling tube can guarantee the fully horizontal of entire horizontally loading test device, and the transmission loading direction of power is complete
Level can accurately detect the horizontal displacement at mini pile stake end, make measurement result more accurate；
The 3rd, liftable bearing is set, support with adjustable height is suitble to the pile crown of arbitrary height, makes the balance adjustment of device more
Add conveniently, simply；
4th, general static-load testing device is only applicable to single pile horizontal checkout, and the application can be carried out at the same time double stake tests, and
Repacking is very simple, and applicability is wide；
5th, whole device structure is more stablized, easy for assemble or unload, and reliability is high.
Description of the drawings
Fig. 1 is the single unit system structure diagram of single pile horizontal checkout of the embodiment of the present invention；
Fig. 2 is the single unit system structure schematic top plan view of single pile horizontal checkout of the embodiment of the present invention；
Fig. 3 is the single unit system structure diagram of the double stake horizontal checkouts of the embodiment of the present invention；
Fig. 4 is the single unit system structure schematic top plan view of the double stake horizontal checkouts of the embodiment of the present invention；
In figure:1- datum line beams, 2- Magnetic gauge stands, 3- displacement sensors, 4- π shape steel plates, 5- fixing nuts, 6- first are fixed
Stent, 7- levelling tubes, 8- hydraulic jacks, the first force transmission shafts of 9-, 10- liftable bearings, 11- counterforce device end plates, 12- oil inlets
Pipe, the second force transmission shafts of 13-, 14- the first L-type steel plates, 15- load sensors, 16- fixing bolts, 17- the second L-type steel plates, 18-
Third force transmission shaft, the second fixing brackets of 19-.
Specific embodiment
Technical solution of the present invention is described in detail with example 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 sensor 3, π shape steel plates 4, pile crown fixing nut 5, the first fixing bracket 6, levelling tube 7, hydraulic pressure
Jack 8, the first force transmission shaft 9, liftable bearing 10, (the counterforce device end plate 11 during double horizontal checkouts of counterforce device end plate 11
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 17,18 and second fixing bracket 19 of third force transmission shaft, Magnetic gauge stand 2 are built up on datum line beam 1, and π shape steel plates 4 are consolidated by pile crown
To determine nut 5 to be fixed on test pile, pile crown fixing nut 5 is set in test pile stake end, and pile crown fixing nut 5 and π shape steel plates 4 weld,
One end of displacement sensor 3 is fixed on Magnetic gauge stand 2, the plate face of the other end and π shape steel plates 4 is in close contact, on π shape steel plates 4
Equipped with preformed hole, the left end of the first force transmission shaft 9 is hinged at the preformed hole with π shape steel plates 4 (ensureing that the horizontal of power is transmitted)；
Hydraulic jack 8 is by being set to the first L-type steel plate 14 at its both ends and the first fixing bracket 6 and liftable bearing
10 cooperations, which are held up, to be fixed, and the first fixing bracket 6 includes the first spiral and the first nut, and the first spiral passes through left and right two
By first nut in two piece of first L-type steel plate, 14 outside by hydraulic jack 8 after preformed hole between the first L-type steel of block plate 14
It is tightened in it, two piece of first 14 lower section of L-type steel plate is supported by four liftable bearings 10 (can adjust liftable as needed
10 height of bearing)；The right end of first force transmission shaft 9 passes through the first L-type steel plate 14 in left side to extend into the pre- of 8 left end of hydraulic jack
It boxes out hole, and passes through fixing bolt 16 and be fixedly connected；One end of the first L-type steel plate 14 and the second force transmission shaft 13 on right side is affixed,
The other end of second force transmission shaft 13 is connected with one end of load sensor 15, the same hydraulic jack of fixing means of load sensor 15
Top 8, specially：Load sensor 15 is by being set to the second L-type steel plate 14 at its both ends and the second fixing bracket 19 and can rise
The cooperation of descending branch seat 10, which is held up, to be fixed, and the second fixing bracket 19 includes the second spiral and the second nut, and the second spiral is worn
It will be born by second nut in two piece of second 17 outside of L-type steel plate after the preformed hole crossed between the two piece of second L-type steel plate 17 in left and right
Lotus sensor 15 is tightened in it, and two piece of second 17 lower section of L-type steel plate is supported by four liftable bearings 10 (can be as needed
Adjust 10 height of liftable bearing), the other end of load sensor 15 connects counterforce device end plate 11 by third force transmission shaft 18.
First force transmission shaft 9, third force transmission shaft 18, hydraulic jack 8, is all provided on load sensor 15 second force transmission shaft 13
Levelling tube 7 is put.
Single pile horizontal checkout experiment is done using above device and generally requires four displacement sensors, 3, pile crowns fixation spiral shells
Mother 5 and eight liftable bearings 10.
With reference to shown in Fig. 3~Fig. 4, other structures are identical with single pile test during double tests, and being in place of uniquely distinguishing will be right
The counterforce device end plate 11 of side be substituted for same left side by pile crown fixing nut 5, π shape steel plates 4 and displacement sensor 3, datum line beam 1
The test pile horizontal measurement part of composition does double stake horizontal checkout experiments and generally requires eight displacement sensors, 3, two pile crowns fixation spiral shells
Mother 5 and eight liftable bearings 10.
In use, carrying out the method for mini pile horizontal checkout using static-load testing device of the present invention, include 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
It determines, it is long as possible, but its rise-span ratio is not preferably less than 1/40, and datum line beam 1 is not less than 4 times of test pile diameters with test pile distance；
2) Magnetic gauge stand 2 is set on datum line beam 1；
3) pile crown fixing nut 5 is selected according to the size of test pile diameter, it with π shape steel plates 4 is welded and is fixed on pile crown；
4) reinforcing bar is passed through into 9 left end preformed hole of 4 preformed hole of π shape steel plates and the first force transmission shaft, and use in 4 outside of π shape steel plates
Nut is fixed；
5) by two first spirals parallel across the preformed hole of the first L-type steel of left and right two panels plate 14 and with the first nut
It is fixed, them is made to be connected as a single entity, four only lifting supports 10 are each passed through the reserved of the 14 bottom arm of angle of the first L-type steel of two panels plate
Kong Bingyong nuts are fixed up and down to get up integrated support described above, with fixed hydraulic jack 8,9 right end of the first force transmission shaft
The first L-type steel plate 14 across left side extend into the reserving hole of 8 left end of hydraulic jack, and is fixed and connected using fixing bolt 16
It connects；
6) with the method firm demand sensor 15 identical with fixed hydraulic jack 8, the second spiral parallel across
The preformed hole of the second L-type steel of left and right two panels plate 17 is simultaneously fixed with the second nut, 13 left end of the second force transmission shaft in advance with right side
One L-type steel plate 14 is welded, and 13 right end of the second force transmission shaft passes through 17 preformed hole position of the second L-type steel plate and the load sensor in left side
15 left ends connect, and 18 left end of third force transmission shaft passes through the 17 preformed hole position of the second L-type steel plate on right side and 15 right end of load sensor
Connection, 18 right end of third force transmission shaft are connect with counterforce device end plate 11, and counterforce device end plate withstands on the structure that can provide counter-force
On object；
7) oil inlet pipe 12 and the controller of hydraulic jack 8 are connected, load sensor 15 are connected with computer,
Determine that all devices work normally；
8) adjusting the height of liftable bearing 10 makes the first force transmission shaft 9, the second force transmission shaft 13, third force transmission shaft 18, hydraulic pressure
7 bubble of levelling tube on jack 8, load sensor 15 is (keeping package unit levelness) placed in the middle；
9) displacement sensor 3 is fixed on Magnetic gauge stand 2, and test displacement sensor 3 probe whether with π shape steel plates
4 are in close contact；
10) oil inlet quantity of oil inlet pipe 12 is controlled by 8 controller of hydraulic jack, horizontal mipmap loading is carried out to test pile,
Loading procedure is referred to according to test pile size and purposes《Architecture foundation pile inspection specifications (JGJ106-2014)》Given classification adds
Load mode is implemented；
11) it after test pile is per horizontal distortion is stablized caused by level-one horizontal addload, reads displacement sensor 3 and load passes
The reading of sensor 15, and make a record, then start next stage loading；
12) basis《Architecture foundation pile inspection specifications (JGJ106-2014)》Given termination horizontal addload standard stops
It loads, then load shedding, until horizontal addload is restored to 0；
13) after the completion of testing, horizontally loading test device is removed, convenient for reusing.
Embodiment 2 (application 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
It determines, it is long as possible, but its rise-span ratio is not preferably less than 1/40, and datum line beam 1 is with test pile distance otherwise less than 4 times of test pile diameters；
2) Magnetic gauge stand 2 is set on datum line beam 1；
3) pile crown fixing nut 5 is selected according to the size of left side test pile diameter, it is welded and be fixed on π shape steel plates 4
Pile crown；
4) reinforcing bar is passed through into 9 left end preformed hole of 4 preformed hole of π shape steel plates and the first force transmission shaft, and use in 4 outside of π shape steel plates
Nut is fixed；
5) by two first spirals parallel across the preformed hole of the first L-type steel of left and right two panels plate 14 and with the first nut
It is fixed, them is made to be connected as a single entity, four only lifting supports 10 are each passed through the reserved of the 14 bottom arm of angle of the first L-type steel of two panels plate
Kong Bingyong nuts are fixed up and down to get up integrated support described above, with fixed hydraulic jack 8,9 right end of the first force transmission shaft
The first L-type steel plate 14 across left side extend into the reserving hole of 8 left end of hydraulic jack, and is fixed using fixing bolt 16；
6) with the method firm demand sensor 15 identical with fixed hydraulic jack 8, the second spiral parallel across
The preformed hole of the second L-type steel of left and right two panels plate 17 is simultaneously fixed with the second nut, 13 left end of the second force transmission shaft in advance with right side
One L-type steel plate 14 is welded, and 13 right end of the second force transmission shaft passes through 17 preformed hole position of the second L-type steel plate and the load sensor in left side
15 left ends connect, and 18 left end of third force transmission shaft passes through the 17 preformed hole position of the second L-type steel plate on right side and 15 right end of load sensor
Connection, 18 right end of third force transmission shaft are connect by π shape steel plates 4, pile crown fixing nut 5 with right side test pile；It is identical with left side test pile,
Right side test pile sets datum line beam 1 and displacement sensor 3 respectively, and Magnetic gauge stand 2 is set on datum line beam 1；
7) oil inlet pipe 12 and the controller of hydraulic jack 8 are connected, load sensor 15 are connected with computer,
Determine that all devices work normally；
8) adjusting the height of liftable bearing 10 makes the first force transmission shaft 9, the second force transmission shaft 13, third force transmission shaft 18, hydraulic pressure
7 bubble of levelling tube on jack 8, load sensor 15 is (keeping package unit levelness) placed in the middle；
9) displacement sensor 3 is fixed on Magnetic gauge stand 2, and test displacement sensor 3 probe whether with π shape steel plates
4 are in close contact；
10) oil inlet quantity of oil inlet pipe 12 is controlled by 8 controller of hydraulic jack, horizontal mipmap loading is carried out to test pile,
Loading procedure is referred to according to test pile size and purposes《Architecture foundation pile inspection specifications (JGJ106-2014)》Given classification adds
Load mode is implemented；
11) it after test pile is per horizontal distortion is stablized caused by level-one horizontal addload, reads displacement sensor 3 and load passes
The reading of sensor 15, and make a record, then start next stage loading；
12) basis《Architecture foundation pile inspection specifications (JGJ106-2014)》Given termination horizontal addload standard stops
It loads, then load shedding, until horizontal addload is restored to 0；
13) after the completion of testing, horizontally loading test device is removed, convenient for reusing.
Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and is not to the present invention
The restriction of embodiment.For example 4 even more position installation positions can be provided using the pile crown attachment device that the patent provides
Displacement sensor.For those of ordinary skill in the art, the obvious change that spirit under this invention is extended out
Change or change and be still in the protection scope of this invention.
Claims (9)
1. a kind of mini pile horizontally loading test device, which is characterized in that including datum line beam, Magnetic gauge stand, displacement sensor, π
Shape steel plate, pile crown fixing nut, the first fixing bracket, 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, third force transmission shaft and the second fixing bracket,
Magnetic gauge stand is built up on datum line beam, and π shape steel plates are fixed on by pile crown fixing nut on test pile, and pile crown fixing nut is set in
Test pile stake end, pile crown fixing nut and π shape steel plates weld, and one end of displacement sensor 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 plates are equipped with preformed hole, and the left end and π shape steel plates of the first force transmission shaft are in the preformed hole
Place is hinged；
Hydraulic jack is held up from being set to the first L-type steel plate at its both ends and the first fixing bracket and liftable bearing
It is fixed, by liftable seat supports below two piece of first L-type steel plate；The right end of 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 passes through fixing bolt and be fixedly connected；The first L-type steel plate on right side and
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 setting
It holds up and fixes in the second L-type steel plate at its both ends and the cooperation of the second fixing bracket and liftable bearing, two piece of second L-type steel plate
Lower section passes through third power transmission axis connection 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, which is characterized in that first force transmission shaft,
Two force transmission shafts, hydraulic jack, are provided with levelling tube on load sensor at third force transmission shaft.
3. mini pile horizontally loading test device according to claim 1, which is characterized in that the first fixing bracket packet
The first spiral and the first nut are included, the first spiral leads to after the preformed hole across the two piece of first L-type steel plate in left and right
Hydraulic jack is tightened in it by the first nut crossed on the outside of two piece of first L-type steel plate.
4. mini pile horizontally loading test device according to claim 1, which is characterized in that the second fixing bracket packet
The second spiral and the second nut are included, the second spiral leads to after the preformed hole across the two piece of second L-type steel plate in left and right
Load sensor is tightened in it by the second nut crossed on the outside of two piece of second L-type steel plate.
5. mini pile horizontally loading test device according to claim 1, which is characterized in that the π shape steel plates are by three pieces
Steel plate is welded.
6. mini pile horizontally loading test device according to claim 1, which is characterized in that the 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, which is characterized in that the datum line beam is shaped steel.
8. mini pile horizontally loading test device according to claim 1, which is characterized in that counter-force when single pile is tested
The counter-force that device end plate provides is more than horizontal addload during test；Counterforce device end plate is used during double tests fixes spiral shell by pile crown
The test pile horizontal measurement part that female, π shape steel plates and displacement sensor, datum line beam are formed is replaced.
9. the mini pile horizontally loading test device according to claim 1 ~ 8 is one of arbitrary carries out mini pile horizontal checkout
Method, which is characterized in that include the following steps：
1）Datum mark to be chosen according to test site condition, datum line beam is set, the length of datum line beam is determined according to the position of test pile,
Its rise-span ratio is not less than 1/40, and datum line beam is not less than 4 times of test pile diameters with test pile distance；
2）Magnetic gauge stand is set on datum line beam；
3）Pile crown fixing nut is selected according to the size of test pile diameter, it with π shape steel plates is welded and is fixed on pile crown；
4）Reinforcing bar is passed through into π shape steel plates preformed hole and the first force transmission shaft left end preformed hole, and consolidated on the outside of π shape steel plates with nut
It is 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,
Them is made to be 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
Female fixation up and down supports hydraulic jack, and the first force transmission shaft right end 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 the method firm demand sensor identical with fixed hydraulic jack, the second spiral is parallel across left and right two panels
The preformed hole of second L-type steel plate is simultaneously fixed with the second nut, and the second force transmission shaft left end welds in advance with the first L-type steel plate on right side
Good, the second force transmission shaft right end passes through the second L-type steel plate preformed hole position in left side to be connect with load sensor left end, third force transmission shaft
Left end passes through the second L-type steel plate preformed hole position on right side to be connect with load sensor right end, and third force transmission shaft right end is filled with counter-force
End plate connection is put, counterforce device end plate, which is withstood on, to be provided on the works of counter-force；
7）Oil inlet pipe and the controller of hydraulic jack are connected, load sensor is connected with computer, determines all devices
Normal work；
8）Adjusting the height of liftable bearing makes the first force transmission shaft, the second force transmission shaft, third force transmission shaft, hydraulic jack, load
Level tube bubble on sensor is placed in the middle；
9）Displacement sensor is fixed on Magnetic gauge stand, and whether the probe for testing displacement sensor closely connects with π shape steel plates
It touches；
10）The oil inlet quantity of oil inlet pipe is controlled by hydraulic jack controller, horizontal mipmap loading, loading procedure are carried out to test pile
It is referred to according to test pile size and purposes《Architecture foundation pile inspection specifications（ JGJ106-2014 ）》Given hierarchical loading side
Formula is implemented；
11）After test pile is per horizontal distortion is stablized caused by level-one horizontal addload, displacement sensor and load sensor are read
Reading, and make a record, then start next stage loading；
12）According to《Architecture foundation pile inspection specifications（ JGJ106-2014 ）》Given termination horizontal addload standard stops
It loads, then load shedding, until horizontal addload is restored to 0；
13）After the completion of experiment, horizontally loading test device is removed, convenient for reusing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109372034B (en) * | 2018-09-25 | 2020-07-14 | 大连理工大学 | Device and method for testing internal damage mechanism of suction bucket foundation in pulling-up process |
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| CN204326120U (en) * | 2014-12-05 | 2015-05-13 | 武汉科技大学 | A kind of device measuring horizontal bearing capacity of single pile |
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| CN205636839U (en) * | 2016-05-27 | 2016-10-12 | 广西壮族自治区建筑工程质量检测中心 | Horizontal static test's of horizontal bearing stake single pile loading counterforce device |
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