CN105136571B - A kind of Multifunctional pressure head device for local loading - Google Patents
A kind of Multifunctional pressure head device for local loading Download PDFInfo
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- CN105136571B CN105136571B CN201510428595.5A CN201510428595A CN105136571B CN 105136571 B CN105136571 B CN 105136571B CN 201510428595 A CN201510428595 A CN 201510428595A CN 105136571 B CN105136571 B CN 105136571B
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Abstract
The present invention discloses a kind of Multifunctional pressure head device for local loading, and it is in contact by the one side of support plate with load power source, and positioning hole is set by the another side of support plate；The one side of ball-type seat has ball crown type position, and the another side of ball-type seat sets the alignment pin being engaged with positioning hole；The one side of adjustable plate sets circular groove, and the another side of adjustable plate sets two parallel locating slots I and II；Loading blocks are strip steel plate I, and the bottom surface of loading blocks is plane, and the top surface of loading blocks sets the alignment pin I and II being connected respectively with locating slot I and II；Non-load piece is strip steel plate II, and non-load piece of bottom surface is plane, and non-load piece of top surface sets the alignment pin III and IV being connected respectively with locating slot I and II；Cushion is arranged on non-load piece between adjustable plate, and cushion size matches with non-load piece of one side.The indenter device can quickly adjust local loading area and position, it is ensured that the balance and loading between test block and pressure head are stable, while blasting vibration wave can be absorbed.
Description
Technical field
It is specially a kind of for the multi-functional of local loading the invention belongs to a kind of loading device used in Geotechnical Engineering
Indenter device, the local loading available for rock and concrete test block.
Background technology
In Geotechnical Engineering field, it is often necessary to carry out local loading to rock or concrete test block, by electrical measuring method or
The method of testings such as sound emission act on local load the contents such as stress-strain state, the failure mode of lower test block and studied.It is right
Test block carries out local loading, general to transmit load using edge of a knife hinge or ball hinged support, and bearing loading surface size, which is less than, is loaded examination
The load stress surface of block, bearing center just needs the center of local loading to test block during loading, and the contact surface of test block and bearing is
For local load's acting surface.When the edge of a knife is cut with scissors or ball hinged support carries out local loading, there is problem is：1st, supporting stand size is fixed, when
, can only be by changing various sizes of bearing when needing to change local loading area, it is impossible to easily adjust load-carrying area size
To realize；2nd, the center that bearing center must just to local loading zone, when loading zone is located at test block edge, bearing is to examination
The constraints of block is deteriorated, and the balance between bearing and test block is difficult to control, and test block stability is poor in loading procedure, is easily caused
Loading failure；Bearing and test block contact surface are close contact state when the 3, loading, and remainder is test block face and air contact.When
Dynamic loading experiments are carried out in test block, when particularly simulating Blow-up Problems in Infinite medium, test block loading border can not have been formed
Whole nonreflecting boundary condition, it is larger with the infinite medium state difference of engineering in practice, cause simulated test and actual conditions
It is not inconsistent.
The content of the invention
There is provided a kind of Multifunctional pressure head device for local loading, energy for the problem of present invention exists for prior art
Enough quick adjustment local loading areas and position, it is ensured that the balance and loading between test block and pressure head are stable, while can absorb
Blasting vibration wave, the Multifunctional pressure head device that border forms complete nonreflecting boundary condition is loaded in test block.
The technical solution adopted by the present invention is：
A kind of Multifunctional pressure head device for local loading, including by support plate, ball-type seat, adjustable plate, several loading blocks,
Several cushions and several non-load piece；
The one side by support plate is in contact with load power source, by support plate another side be provided with positioning hole；
The one side of the ball-type seat has ball crown type position, and the another side of ball-type seat is provided with the positioning being engaged with positioning hole
Pin, is embedded in positioning hole by alignment pin and is connected ball-type seat with by support plate；
The one side of the adjustable plate be provided with circular groove, with ball-type seat ball crown type position coordinate, adjustable plate it is another
Face is provided with two parallel locating slots I and II, for loading blocks and non-load piece of positioning and position adjustments；Circular groove with
It is space parallel relation between locating slot I and II；
The loading blocks are strip steel plate I, and the bottom surface of loading blocks is plane, with being loaded loading section in test block during experiment
Contact, the top surface of loading blocks is provided with the alignment pin I and II being connected respectively with locating slot I and II；
Described non-load piece is strip steel plate II, and non-load piece of bottom surface is plane, during experiment be loaded it is non-in test block
Loading section is contacted, and non-load piece of top surface is provided with the alignment pin III and IV being connected respectively with locating slot I and II；
The cushion is arranged on non-load piece between adjustable plate, cushion size and non-load piece of one side phase
Match somebody with somebody, cushion is provided with through hole I and II corresponding with alignment pin III and IV respectively.
A kind of described Multifunctional pressure head device for local loading, the loading blocks are divided into I type loading blocks, II type and added
Carry in block and III type loading blocks, the I type loading blocks, II type loading blocks and III type loading blocks has first side and with the respectively
One side back to second side, the two ends of the first side of the I type loading blocks are respectively equipped with pin-and-hole；The II type loading
The two ends of the second side of block are respectively equipped with alignment pin V；The two ends of the first side of the III type loading blocks are respectively equipped with pin
Hole, the two ends of the second side of III type loading blocks are respectively equipped with alignment pin V, the I type loading blocks, II type loading blocks and III type
Assembled between loading blocks by the cooperation of pin-and-hole and alignment pin V.
A kind of described Multifunctional pressure head device for local loading, described non-load piece is divided into non-load piece of I type, II
Have respectively in non-load piece of type and non-load piece of III type, non-load piece of I type, non-load piece of II type and non-load piece of III type
First side and with first side back to second side, the two ends of the first side of non-load piece of I type are respectively equipped with
Pin-and-hole；The two ends of the second side of non-load piece of II type are respectively equipped with alignment pin V；The first of non-load piece of III type
The two ends of side are respectively equipped with pin-and-hole, and the two ends for the second side that non-load piece of III type are respectively equipped with alignment pin V, and I type is non-
Assembled between loading blocks, non-load piece of II type and non-load piece of III type by the cooperation of pin-and-hole and alignment pin V.
A kind of described Multifunctional pressure head device for local loading, described non-load piece and elastic mat thickness sum etc.
In the thickness of loading blocks.
A kind of described Multifunctional pressure head device for local loading, it is described by fixed on positioning hole in support plate and ball-type seat
After position pin coordinates, 1mm gaps are left with positioning hole bottom at the top of alignment pin.
Locating slot I and II and loading in a kind of described Multifunctional pressure head device for local loading, the adjustable plate
After alignment pin I and II is respectively cooperating with plate, the top of alignment pin I and II is respectively kept with 1mm gaps with the bottom of locating slot I and II；
After locating slot I and II is respectively cooperating with alignment pin III and IV on non-load plate in the adjustable plate, the He of alignment pin III
IV top is respectively kept with 1mm gaps with the bottom of locating slot I and II.
A kind of described Multifunctional pressure head device for local loading, described is steel plate by support plate, by the one side of support plate
For plane, it is in contact during experiment with load power source, positioning hole is provided with by the middle position of the another side of support plate.
A kind of described Multifunctional pressure head device for local loading, in addition to rigid frame, the load power source
It is described to be loaded the middle part that test block is arranged on rigid frame on rigid frame.
A kind of application method of Multifunctional pressure head device for local loading, has steps of：
First, according to local loading test requirements document, clear and definite local loading region and its center in test block are being loaded,
Appropriate loading blocks are chosen, are combined；Clearly local non-load region and its center are being loaded in test block, is choosing suitable
Non-load piece of amount, is combined；
Secondly, by the loading blocks arranged according to certain sequential combination and non-load piece, the alignment pin I in loading blocks is passed through
It is combined with the alignment pin III and IV on II, non-load piece with the locating slot I and II on adjustable plate；
Then, ball crown type position is put into circular arc by the ball-type seat with alignment pin with being combined by support plate
In the adjustable plate of groove, the combination of Multifunctional pressure head device is completed；
Finally, test block will be loaded to be put into rigid frame, a multi-functional pressure is placed in two faces of loading direction respectively
Head device, makes the one side by support plate in loading blocks combination center and loading area center alignment, each Multifunctional pressure head device
The pressure head with load power source is contacted respectively, by load power source imposed load, realizes the local loading to being loaded test block.
The invention has the advantages that：
1st, a kind of Multifunctional pressure head device for local loading of the invention, including by support plate, ball-type seat, adjustable plate, non-
Loading blocks, loading blocks and the part of cushion 6；Non-load piece uses cooperatively with cushion, after being combined with loading blocks, according to loading side
Case, is covered to the full contact for being loaded plane where loading direction is realized in test block；Adjustable plate side locating slot and loading blocks and
Non-load piece of detent fit, realizes load transmission and to loading blocks and non-load piece of positioning；Adjustable plate opposite side circular arc
Groove is used to adjust the position of ball-type seat in a groove, realizes the regulation of load center position；It is used to receive and balance by support plate
Load from load power source, by the ball-type seat in adjustable plate circular arc type groove in the form of point load, to being loaded examination
Block carries out local loading.The device is realized to local loading area size by adjusting loading blocks and non-load piece of quantity
Control, the position in test block face loaded, flexible modulation local loading position, by being added are being loaded by adjusting loading blocks
Carry the full contact covering in each face of test block, it is ensured that balance and loading stability between test block and pressure head；Non-load piece and bullet
Property pad combination, using cushion and non-load piece of poor rigidity, both ensured non-load piece with being loaded test block close contact, and place
In no-load or small loaded-up condition, moreover it is possible to absorb blasting vibration wave, complete nonreflecting boundary condition is formed on test block border,
Simulate the Blow-up Problems in Infinite medium.The present invention compared with prior art, using combined loading blocks and non-load piece,
Realize to local loading range and the adjustment of the fast and flexible at position.
2nd, it is of the invention compared with local loading device of the prior art, it can realize that pressure head locally adds to being loaded test block
The all standing of plane where carrying, no matter local loading, positioned at the middle part or edge of test block, can be implemented preferably about to test block
Beam, it is ensured that the balance and stability of test block, improves local loading effect.The present invention using the cushion with certain elasticity with
Non-load piece uses cooperatively, may be implemented in no-load or compared with low load effect, be loaded in test block non-load region with it is non-
Loading blocks rigid face is combined closely, when there is stress wave propagation in test block, on the interface that test block is contacted with pressure head of the present invention
Formed zero recoil fraction, available for simulation infinite medium in stress wave propagation, with engineering practice closer to.The present invention
With local loading device of the prior art be only capable of carry out single-point loading situation compared with, by using two groups or more plus
Block combination, and the regulation to ball-type seat relative position in adjustable plate groove are carried, the multiple spot different loads to test block can be achieved
Loading, loaded-up condition that can be more complicated in simulating test pieces.
Brief description of the drawings
Fig. 1 is a kind of Multifunctional pressure head apparatus structure schematic diagram for local loading of the invention；
Fig. 2 is adjustable plate front view in the present invention.
Fig. 3 is the side view of adjustable plate in the present invention.
Fig. 4 is the upward view of adjustable plate in the present invention.
Fig. 5 carries out the schematic diagram of local loading experiment for the present invention.
In figure：1- is by support plate, 2- ball-types seat, 3- adjustable plates, 4- cushions, non-load piece of 5-, 6- loading blocks, 7- positioning
Hole, 8 alignment pins, 9- circular grooves, 10- locating slots I or II, 11- alignment pins III or IV, 12- pin-and-holes, 13- alignment pins V,
14- is loaded test block, 15- rigid frames, 16- load power sources, 17- alignment pins I or II.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
A kind of Multifunctional pressure head device for local loading as shown in Figure 1, including by support plate 1, ball-type seat 2, adjustable plate
3rd, several loading blocks 6, several cushions 4 and several non-load piece 5, the one side by support plate 1 connects with load power source 16
Touch, by support plate 1 another side be provided with positioning hole 7；By support plate 1 be steel plate, by support plate 1 one side be plane, during experiment with carry
Lotus power source 16 is in contact, and positioning hole 7 is set by the middle position of the another side of support plate 1.Ball-type seat 2 uses steel material, ball
The one side of type seat 2 has ball crown type position, and the another side of ball-type seat 2 is provided with the alignment pin 8 being engaged with positioning hole 7, preferably
Ball-type seat 2 another side be plane, center have projection alignment pin 8, by alignment pin 8 be embedded in positioning hole 7 by ball-type seat 2 with by
Support plate 1 is connected；After being coordinated by alignment pin 8 on positioning hole 7 in support plate 1 and ball-type seat 2, the top of alignment pin 8 is stayed with the bottom of positioning hole 7
There are 1mm gaps.
Adjustable plate 3 is that, with certain thickness steel plate, the one side of adjustable plate 3 is provided with circular groove 9 as in Figure 2-4,
Coordinate with the ball crown type position of ball-type seat 2, the another side of adjustable plate 3 is provided with two parallel locating slots I and II 0, for loading
Block 6 and non-load piece 5 of positioning and position adjustments；It is space parallel relation between circular groove 9 and locating slot I and II 10；
After being combined by support plate 1 with ball-type seat 2, the spherical crown surface of ball-type seat 2 can be axial certainly along groove in circular groove 9 on adjustable plate 3
By moving, according to the loading of local single-point or the requirement of multipoint excitation, level of 2 centers of regulation ball-type seat in circular groove 9
Position.
Loading blocks 6 are that the bottom surface of loading blocks 6 is plane, with being loaded test block during experiment with certain thickness strip steel plate I
Loading section is contacted on 14, and the top surface of loading blocks 6 is provided with the alignment pin I and II 17 being connected respectively with locating slot I and II 10；Loading
6 points of block is I type loading blocks 6, II type loading blocks 6 and III type loading blocks 6, and the I type loading blocks 6, II type loading blocks 6 and III type add
Carry block 6 on respectively have first side and with first side back to second side, the two of the first side of I type loading blocks 6
End is respectively equipped with pin-and-hole 12；The two ends of the second side of the II type loading blocks 6 are respectively equipped with alignment pin V 13；III type adds
The two ends for carrying the first side of block 6 are respectively equipped with pin-and-hole 12, and the two ends of the second side of III type loading blocks 6 are respectively equipped with alignment pin
V 13, carried out between I type loading blocks 6, II type loading blocks 6 and III type loading blocks 6 by the cooperation of pin-and-hole 12 and alignment pin V 13
Assembling, the usage quantity of loading blocks 6 is adjusted flexibly according to local loading necessary requirement in test block 14 is loaded.The side pin of loading blocks 6
After hole 12 coordinates with other loading blocks side alignment pins V 13, at the top of the side alignment pin V 13 and bottom of pin-and-hole 12 is left between 1mm
Gap.After locating slot I and II 10 is respectively cooperating with alignment pin I and II 17 in loading blocks 6 in adjustable plate 3, the top of alignment pin I and II 17
1mm gaps are respectively kept with the bottom of locating slot I and II 10.
Non-load piece 5 is that non-load piece 5 of bottom surface is plane, with being added during experiment with certain thickness strip steel plate II
Non-load part contact in test block 14 is carried, non-load piece 5 of top surface is provided with the alignment pin III being connected respectively with locating slot I and II 10
With IV 11；Non-load piece 5 points are non-load piece 5 of non-load piece 5 of 5, II type of non-load piece of I type and III type, non-load piece 5, II of I type
Have respectively in non-load piece 5 of non-load piece 5 of type and III type first side and with first side back to second side, I type
The two ends of non-load piece 5 of first side are respectively equipped with pin-and-hole 12；The two ends for the second side that non-load piece 5 of II type are respectively equipped with
Alignment pin V 13；The two ends for the first side that non-load piece 5 of III type are respectively equipped with pin-and-hole 12, and the of non-load piece 5 of III type
The two ends of two side faces are respectively equipped with alignment pin V 13, non-load piece 5 of non-load piece 5 of 5, II type of non-load piece of I type and III type
Between assembled by the cooperation of pin-and-hole 12 and alignment pin V 13, non-load piece of 5 usage quantities are according to being loaded in test block 14
Spot size without being loaded is determined.Non-load piece of 5 side surface pin-holes 12 and other non-load piece of side alignment pin V
After 13 coordinate, 1mm gaps are left in the top of side alignment pin V 13 with the bottom of pin-and-hole 12.In adjustable plate 3 locating slot I and II 10 with it is non-
After alignment pin III and IV 11 is respectively cooperating with load plate 5, the top of alignment pin III and IV 11 is stayed respectively with the bottom of locating slot I and II 10
There are 1mm gaps.
The cushion 4 is arranged between non-load piece 5 and adjustable plate 3, the size of cushion 4 and non-load piece 5 of one side
Match, cushion 4 is provided with through hole I and II corresponding with alignment pin III and IV 11 respectively.Cushion 4 for elasticity preferably,
With certain thickness rubber blanket, its size is consistent with the size of non-load piece 5 of one side.Non-load piece 4 and the thickness of cushion 4
Sum is equal to the thickness of loading blocks 6.Loading blocks light plate thickness and the height sum of alignment pin I or II 10, with steel in non-load plate
Plate thickness with III or IV 11 height sum it is equal, load plate light plate thickness be more than non-load plate light plate thickness 2mm, alignment pin
I or II 10 height be less than alignment pin III and IV 11 height 2mm.
After the loading blocks 6 are combined with non-load piece 5, use cooperatively, can be achieved to being loaded 14 innings of test block with adjustable plate 3
The all standing of plane where portion's loading, it is close to be loaded the plane of test block 14 with loading blocks 6 and non-load piece 5 of steel plain
Contact condition, but the load that local loading position applies is high, and remaining non-load region is in no-load or small loaded-up condition.
A kind of Multifunctional pressure head device for local loading as shown in Figure 5, in addition to rigid frame, the load power
Source is arranged on rigid frame, described to be loaded the middle part that test block is arranged on rigid frame.
A kind of application method of Multifunctional pressure head device for local loading, has steps of：
First, according to local loading test requirements document, clear and definite local loading region and its center in test block are being loaded,
Appropriate loading blocks are chosen, are combined；Clearly local non-load region and its center are being loaded in test block, is choosing suitable
Non-load piece of amount, is combined；
Secondly, by the loading blocks arranged according to certain sequential combination and non-load piece, the alignment pin I in loading blocks is passed through
It is combined with the alignment pin III and IV on II, non-load piece with the locating slot I and II on adjustable plate；
Then, ball crown type position is put into circular arc by the ball-type seat with alignment pin with being combined by support plate
In the adjustable plate of groove, the combination of Multifunctional pressure head device is completed；
Finally, test block will be loaded to be put into rigid frame, a multi-functional pressure is placed in two faces of loading direction respectively
Head device, makes the one side by support plate in loading blocks combination center and loading area center alignment, each Multifunctional pressure head device
The pressure head with load power source is contacted respectively, by load power source imposed load, realizes the local loading to being loaded test block.
Application examples
It is simultaneously plane, there is positioning hole 7 in another side center by steel plate of the support plate 1 using 200mm × 200mm × 50mm, with
Detent fit on ball-type seat 2；Ball-type seat 2 uses diameter phi 100mm steel ball cutting-height to be made up of 20mm spherical crown；Institute
The sphere for stating ball-type seat 2 is put into the circular groove 9 of the side of adjustable plate 3, and can be according to the position of local loading in groove 9
Move freely；Adjustable plate 3 is using 200mm × 200mm × 50mm steel plate, its circular groove 9 long 200mm, wide 60mm, depth
Circular diameter where 10mm, circular arc is consistent with the steel ball size for making ball-type seat 2, is φ 100mm；The positioning of the another side of adjustable plate 3
Flute length 200mm, wide 8mm, depth is 5mm；Non-load piece 5 steel plate using 200mm × 20mm × 18mm, its alignment pin III or IV
11 be diameter phi 8mm, high 6mm steel cylinder, is coordinated with the gap of locating slot I or II 10 on adjustable plate 3, its side surface pin-hole 12
For diameter phi 6mm, depth 3mm circular hole, its side alignment pin V 13 is diameter phi 6mm, high 2mm steel cylinder, with other
Non-load piece of the gap of side surface pin-hole 12 coordinates；Loading blocks 6 are using 200mm × 20mm × 20mm steel plate, its alignment pin I or II
17 be diameter phi 8mm, high 4mm steel cylinder, is coordinated with the gap of locating slot I or II 10 on adjustable plate 3, its side surface pin-hole 12
For diameter phi 6mm, depth 3mm circular hole, its side alignment pin V 13 is diameter phi 6mm, high 2mm steel cylinder, with other
The side surface pin-hole gap of loading blocks coordinates；Cushion 4 is using 200mm × 20mm × 2mm rubber blanket, and through-hole diameter is φ thereon
8mm, position is corresponding with the alignment pin III or IV 11 on non-load piece 5；Be loaded the preferred dimension of body 14 for 200mm × 200mm ×
200mm granite test specimen, the area according to needed for being loaded the local loading of test block 14 selects a number of loading blocks 6, passed through
The pin-and-hole 12 and side alignment pin I or II 17 of the side of loading blocks 6 are combined into one, and its center is with being loaded needed for test block 14 locally
Load center alignment；Non-load piece 5 is combined into one by side surface pin-hole 12 and side alignment pin III or IV 11, be placed into by
Load the position without loading in test block 14；It will combine by support plate 1, ball-type seat 2 and adjustable plate 3, according to fixed on adjustable plate 3
Position groove I or II 10, enters with the one-to-one position of alignment pin on I in loading blocks 6 or II 17, and non-load piece 5 III or IV 11
Row combination；In its excess-three face for being loaded test block 14, in the same way, arrangement many work(are needed according to local loading
Can indenter device；Load power source 16 selects JRSM-1000 type hydraulic jacks, and load capability is 0~1000KN；Rigid frame
15 be self-control steel framework.Load power source 16 is placed on by between support plate 1 and rigid frame 15, in the constraint of rigid frame 15
Under, implement local loading to being loaded test block 14.
Local loading is carried out to being loaded test block using described Multifunctional pressure head device, comprised the following steps：
Step one：Local loading scheme is determined, needs the position for carrying out local loading to be indicated being loaded test block 14,
Determine that its loads center line, and test block 14 will be loaded be put into rigid frame 15；
Step 2：A number of loading blocks 6 are chosen according to loading scheme, pass through its side alignment pin 13 and side surface pin-hole
It is combined into one, is placed into the face loaded of test block 14 that is loaded, the plane side of loading blocks 6 needs local add with being loaded test block 14
The face of load is in contact, and is loaded block position after regulation combination, makes assembly center line and be loaded in the loading zone of test block 14
Heart line aligns；
Step 3：According to the size for being loaded non-load region in test block 14, a number of non-load piece 5 is chosen, is led to
Cross its side alignment pin 13 to be combined into one with side surface pin-hole, be placed into the non-load area being loaded on the face loaded of test block 14
Domain, non-load piece of 5 plane sides are contacted with being loaded the non-load face of test block 14, and each non-load piece 5 alignment pin side is put
Put corresponding cushion 4；
Step 4：According to the position corresponding with alignment pin on non-load piece 5 and loading blocks 6 of locating slot on adjustable plate 3, by group
What is got togather is put into inside rigid frame 15 by support plate 1, ball-type seat 2 and adjustable plate 3, is combined into complete local loading multi-functional pressure
Head device, while according to loading scheme, adjustment is made by 2 position on adjustable plate 3 in circular groove 9 of support plate 1 and ball-type seat
The center of ball-type seat 2 and the contact site of circular groove 9 needs the center alignment at local loading position with being loaded test block 14；
Step 5：According to local loading scheme, in its excess-three side for being loaded test block 14, repeat the above steps two to
Step 4, arranges other three sets of indenter devices, and indenter device and the test block 14 that is loaded for being clipped in center are moved into rigid frame
On one angle of 15 inner sides, make wherein close to the inner side of rigid frame 15 two sets of indenter devices by support plate 1 and rigid frame 15
Interior side contacts, in addition two sets of indenter devices be installed with certain space by between support plate 1 and the two neighboring inner side of rigid frame 15,
Test block implementation local loading is loaded for placing 16 pairs of load power source.
Claims (9)
1. a kind of Multifunctional pressure head device for local loading, it is characterised in that including by support plate, ball-type seat, adjustable plate, number
Individual loading blocks, several cushions and several non-load piece；
The one side by support plate is in contact with load power source, by support plate another side be provided with positioning hole；
The one side of the ball-type seat has ball crown type position, and the another side of ball-type seat is provided with the alignment pin being engaged with positioning hole,
Positioning hole is embedded in by alignment pin to be connected ball-type seat with by support plate；
The one side of the adjustable plate is provided with circular groove, coordinates with the ball crown type position of ball-type seat, the another side of adjustable plate is set
There are two parallel locating slots I and II, for loading blocks and non-load piece of positioning and position adjustments；Circular groove and positioning
It is space parallel relation between groove I and II；
The loading blocks are strip steel plate I, and the bottom surface of loading blocks is plane, are tapped during experiment with being loaded loading unit in test block
Touch, the top surface of loading blocks is provided with the alignment pin I and II being connected respectively with locating slot I and II；
Described non-load piece is strip steel plate II, and non-load piece of bottom surface is plane, during experiment be loaded it is non-load in test block
Part is contacted, and non-load piece of top surface is provided with the alignment pin III and IV being connected respectively with locating slot I and II；
The cushion is arranged on non-load piece between adjustable plate, and cushion size matches with non-load piece of one side, bullet
Property pad provided with the through hole I and II corresponding with alignment pin III and IV respectively.
2. a kind of Multifunctional pressure head device for local loading according to claim 1, it is characterised in that the loading
Block is divided into I type loading blocks, II type loading blocks and III type loading blocks, the I type loading blocks, II type loading blocks and III type loading blocks
Have respectively first side and with first side back to second side, the two ends of the first side of the I type loading blocks are divided
She You not pin-and-hole；The two ends of the second side of the II type loading blocks are respectively equipped with alignment pin V；The of the III type loading blocks
The two ends of one side are respectively equipped with pin-and-hole, and the two ends of the second side of III type loading blocks are respectively equipped with alignment pin V, and I type adds
Carry and assembled between block, II type loading blocks and III type loading blocks by the cooperation of pin-and-hole and alignment pin V.
3. a kind of Multifunctional pressure head device for local loading according to claim 1, it is characterised in that it is described non-plus
Carry block and be divided into non-load piece of I type, non-load piece of II type and non-load piece of III type, non-load piece of I type, non-load piece of II type and
In non-load piece of III type respectively have first side and with first side back to second side, non-load piece of I type
The two ends of first side are respectively equipped with pin-and-hole；The two ends of the second side of non-load piece of II type are respectively equipped with alignment pin V；
The two ends of the first side of non-load piece of III type are respectively equipped with pin-and-hole, the two ends difference for the second side that non-load piece of III type
Provided with alignment pin V, pin-and-hole and alignment pin V are passed through between non-load piece of I type, non-load piece of II type and non-load piece of III type
Cooperation assembled.
4. a kind of Multifunctional pressure head device for local loading according to claim 1, it is characterised in that it is described non-plus
Carry the thickness that block is equal to loading blocks with elastic mat thickness sum.
5. a kind of Multifunctional pressure head device for local loading according to claim 1, it is characterised in that the stand under load
Positioning hole with positioning hole bottom with after the upper detent fit of ball-type seat, 1mm gaps are left at the top of alignment pin in plate.
6. a kind of Multifunctional pressure head device for local loading according to claim 1, it is characterised in that the regulation
After locating slot I and II is respectively cooperating with alignment pin I and II in loading blocks in plate, the top of alignment pin I and II and the bottom of locating slot I and II
Portion is respectively kept with 1mm gaps；
After locating slot I and II is respectively cooperating with non-load piece of upper alignment pin III and IV in the adjustable plate, alignment pin III and IV is pushed up
Portion is respectively kept with 1mm gaps with the bottom of locating slot I and II.
7. a kind of Multifunctional pressure head device for local loading according to claim 1, it is characterised in that the stand under load
Plate is steel plate, by support plate one side be plane, be in contact during experiment with load power source, by the middle position of the another side of support plate
Provided with positioning hole.
8. a kind of Multifunctional pressure head device for local loading according to claim 1, it is characterised in that also including firm
Property framework, the load power source be arranged on rigid frame on, it is described to be loaded the middle part that test block is arranged on rigid frame.
9. a kind of application method for the Multifunctional pressure head device for being used for local loading as described in claim any one of 1-8, it is special
Levy and be, have steps of：
First, according to local loading test requirements document, clear and definite local loading region and its center in test block are being loaded, is being chosen
Appropriate loading blocks, are combined；Clearly local non-load region and its center are being loaded in test block, is being chosen in right amount
Non-load piece, it is combined；
Secondly, by the loading blocks arranged according to certain sequential combination and non-load piece, the He of alignment pin I in loading blocks is passed through
IIth, the alignment pin III and IV on non-load piece is combined with the locating slot I and II on adjustable plate；
Then, ball crown type position is put into circular groove by the ball-type seat with alignment pin with being combined by support plate
Adjustable plate in, complete Multifunctional pressure head device combination；
Finally, test block will be loaded to be put into rigid frame, a Multifunctional pressure head dress is placed in two faces of loading direction respectively
Put, distinguish the one side by support plate in loading blocks combination center and loading area center alignment, each Multifunctional pressure head device
Contacted with the pressure head of load power source, by load power source imposed load, realize the local loading to being loaded test block.
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| CN201510428595.5A CN105136571B (en) | 2015-07-21 | 2015-07-21 | A kind of Multifunctional pressure head device for local loading |
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| CN201510428595.5A CN105136571B (en) | 2015-07-21 | 2015-07-21 | A kind of Multifunctional pressure head device for local loading |
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| CN107870120B (en) * | 2017-10-16 | 2021-04-06 | 太原理工大学 | A most advanced loading device for simulating tunnel country rock is under ore deposit pressure centralized status |
| CN109765109A (en) * | 2018-12-28 | 2019-05-17 | 石家庄铁道大学 | Soft Soil Layer pile foundation quasi-Pascal effect experimental rig |
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| US4300397A (en) * | 1980-04-30 | 1981-11-17 | Brest Van Kempen Carel J H | Device and method for determining material strength in situ |
| US4648264A (en) * | 1985-07-19 | 1987-03-10 | Halliburton Company | Multi-function apparatus for testing a sample of material |
| CN201673091U (en) * | 2010-05-19 | 2010-12-15 | 华侨大学 | Auxiliary loading device for compressed column test |
| CN103499491A (en) * | 2013-09-24 | 2014-01-08 | 东北大学 | Multi-axial loading system and method |
| CN103616295A (en) * | 2013-12-10 | 2014-03-05 | 山东科技大学 | Testing device and testing method for mechanical parameters of non-standard rock test piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4451977B2 (en) * | 2000-10-06 | 2010-04-14 | ミサワホーム株式会社 | Concrete compressive strength test equipment |
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|---|---|---|---|---|
| US4300397A (en) * | 1980-04-30 | 1981-11-17 | Brest Van Kempen Carel J H | Device and method for determining material strength in situ |
| US4648264A (en) * | 1985-07-19 | 1987-03-10 | Halliburton Company | Multi-function apparatus for testing a sample of material |
| CN201673091U (en) * | 2010-05-19 | 2010-12-15 | 华侨大学 | Auxiliary loading device for compressed column test |
| CN103499491A (en) * | 2013-09-24 | 2014-01-08 | 东北大学 | Multi-axial loading system and method |
| CN103616295A (en) * | 2013-12-10 | 2014-03-05 | 山东科技大学 | Testing device and testing method for mechanical parameters of non-standard rock test piece |
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