CN207348113U - The support beam counterforce device of anchor pole pullout tests - Google Patents
The support beam counterforce device of anchor pole pullout tests Download PDFInfo
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- CN207348113U CN207348113U CN201721089926.8U CN201721089926U CN207348113U CN 207348113 U CN207348113 U CN 207348113U CN 201721089926 U CN201721089926 U CN 201721089926U CN 207348113 U CN207348113 U CN 207348113U
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- anchor pole
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Abstract
The utility model discloses the support beam counterforce device of anchor pole pullout tests, the device includes the moveable anchor set gradually from top to bottom along anchor pole axial direction, centre-hole jack, backing plate and girder, device further includes reaction support, displacement measuring instrument, reference stake and datum line beam, the reaction support is two, it is both placed on bed course or ground, girder support is on two reaction supports, the upper end of anchor pole is from bottom to top successively at the center of the girder, backing plate, centre-hole jack and moveable anchor pass through, moveable anchor clamps anchor pole, reference stake and datum line beam are respectively positioned on the lower section of girder, reference stake is squeezed into bed course or rock-soil layer, datum line beam is erected on reference stake, the gauge stand of displacement measuring instrument is installed on datum line beam, the anchor pole is additionally provided with the body of rod between girder and bed course or ground and pulls out measurement piece.The device makes anchor pole pullout tests have more engineering practicability.
Description
Technical field
It the utility model is related to the support beam of the anchor pole detection device, in particular to anchor pole pullout tests in geotechnical engineering
Counterforce device.
Background technology
Ground anchorage is the anchor pole by setting in the earth formation, and works is tightly linked together with Rock And Soil, according to
Rely the pulling force of anchor pole and the shearing strength transferring structure thing of surrounding Rock And Soil to be reinforced stratum, both fully excavate ground itself
Intensity, and mitigate dead load significantly, with holding structure thing and the engineering safety and stabilization of Rock And Soil.Mooring rod technique is due to warp
Ji, reliable and construction are fast and convenient, are widely used in China's support engineering and foundation engineering.
Current specifications GB50007-2011, GB50086-2015, GB50330-2013, JGJ120-2012, CECS22：
2005 test methods to anchor pole pullout tests, sentence steady standard etc. carried out it is more explicitly stated, but on instrument and equipment
Installation method and each specification of technical requirements substantially without reference to.
Specification DBJ15-60-2008 provides that the performance requirement of anchor pole pullout tests instrument and equipment can refer to single-pile static loading test
Instrument and equipment performance requirement, but installation method on instrument and equipment and technical requirements are not yet solved and needed there are some
Between the problem of further exploring, such as the loading selection of counterforce device, datum line beam, anchor pole and bearing (bearing plate), reference stake
The problems such as distance relation.
Utility model content
The purpose of this utility model is to provide the support beam counterforce device of anchor pole pullout tests, which resist anchor pole
Pull out experiment and have more operability and stronger engineering practicability, improve the accuracy of test result, reduce testing cost.
The above-mentioned purpose of the utility model is achieved through the following technical solutions：The support beam counter-force of anchor pole pullout tests
Device, anchor pole are vertically arranged, and the lower end of anchor pole is stretched into rock-soil layer, it is characterised in that：Described device is included along anchor pole axial direction side
To moveable anchor, centre-hole jack, backing plate and the girder set gradually from top to bottom, described device further includes reaction support, position
Shift measurement instrument, reference stake and datum line beam, the reaction support are two, symmetrical shape distribution, each reaction support
Longitudinally disposed, two reaction supports are both placed on bed course or ground, and the girder is laterally set, and girder support is at two
On reaction support, the upper end of anchor pole is from bottom to top successively at the center of the girder, backing plate, centre-hole jack and moveable anchor
Pass through, and the top of anchor pole is stretched out from moveable anchor, and moveable anchor clamps anchor pole, and the reference stake and datum line beam are respectively positioned on girder
Lower section, the reference stake is arranged in pairs, and reference stake squeezes into bed course or rock-soil layer, and datum line beam is erected on reference stake, described
The gauge stand of displacement measuring instrument is installed on datum line beam, and the anchor pole is also set in the body of rod between girder and bed course or ground
It is equipped with and pulls out measurement piece, described pulling out measures piece and be horizontally disposed with, and pulls out the indicator of the upper surface for measuring piece and displacement measuring instrument
It is in contact, the centre-hole jack is used for the load for loading anchor pole pullout tests, and the displacement measuring instrument is used to measure
The amount of pulling out on anchor pole.
The support beam counterforce device of the utility model is that reaction support is arranged on from a certain distance from anchor pole, by girder
Be horizontally installed on reaction support, then centre-hole jack be installed on girder, by girder by load counter-force reach bearing and its
A kind of loading counterforce device gone in surrounding rock-soil layer, has higher operability and very strong engineering practicability.
In the utility model, the moveable anchor clamps anchor pole by intermediate plate.
In the utility model, the anchor pole is made of two reinforcing bars being arranged in parallel, and the center line of two reinforcing bars is exactly anchor
The center line of bar.
In the utility model, the reference stake is four, is set in symmetry shape two-by-two, and the datum line beam is two,
Each datum line beam is erected on symmetrically arranged a pair of of reference stake, and the displacement measuring instrument is also two, respectively position
In the left and right sides of anchor pole, it is distributed in symmetry shape.
In the utility model, the gauge stand of the displacement measuring instrument is magnet base, and gauge stand magnetic is on datum line beam.
In the utility model, it is steel disc that described pulling out, which measures piece,.
In the utility model, the distance between on the inside of described two reaction supports and inner side S1>=4B and >=6d and>2.0m
Wherein, B is the width of reaction support, and d is the bore diameter of anchor pole.
In the utility model, the distance between center and anchor pole center of each reference stake S2>2.0m。
In the utility model, the beeline S between the center of each reference stake and reaction support3>=1.5B and>
2.0m, wherein, B is the width of reaction support.
Brief description of the drawings
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the overall structure diagram of the support beam counterforce device of the utility model anchor pole pullout tests；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is soil body vertical attached power calculation diagram；
Fig. 4 is the support beam counterforce device using the utility model anchor pole pullout tests in different bearing inside clearance bars
Soil body vertical attached power and depth curve under part lower bolt central point, in figure, abscissa represents soil body vertical attached power
Value, unit are kPa (kPa), and ordinate z represents depth, and depth refers to from the basis of the plane where the aperture of anchor pole ground here
The depth extended downwards, unit are rice (m)；
Fig. 5 is the support beam counterforce device using the utility model anchor pole pullout tests in different bearing inside clearance bars
With the curve map of anchor pole central spot surface displacement under part, in figure, abscissa represents the clear distance between two reaction supports, unit
For rice (m), ordinate represents surface displacement, and unit is millimeter (mm).
Description of reference numerals
1 is anchor pole, and 2 be moveable anchor, and 3 be centre-hole jack, and 4 be backing plate, and 5 be girder, and 6 be reaction support, and 7 be pad
Layer, 8 be displacement measuring instrument, stake on the basis of 9, beam on the basis of 10, and 11 is pull out measurement piece.
Embodiment
As shown in Figure 1 and Figure 2, anchor pole 1 is vertically arranged the support beam counterforce device of the utility model anchor pole pullout tests,
The lower end of anchor pole 1 is stretched into rock-soil layer, the device include set gradually from top to bottom along 1 axial direction of anchor pole moveable anchor 2, wear
Core type jack 3, backing plate 4 and girder 5, device further include reaction support 6, displacement measuring instrument 8, reference stake 9 and datum line beam 10.
Reaction support 6 is two, and symmetrical shape distribution, each reaction support 6 is longitudinally disposed, two reaction supports
6 are both placed on bed course 7, and girder 5 is laterally set, and 5 support of girder is on two reaction supports 6, and the upper end of anchor pole 1 is from bottom to top
Successively at the center of girder 5, backing plate 4, centre-hole jack 3 and moveable anchor 2 pass through, and the top of anchor pole 1 is from moveable anchor 2
Stretch out, moveable anchor 2 clamps anchor pole 1 by intermediate plate, and reference stake 9 and datum line beam 10 are respectively positioned on the lower section of girder 5, and reference stake 9 is paired
Set, reference stake 9 squeezes into bed course 7, and reference stake 9 can also squeeze into rock-soil layer, and datum line beam 10 is erected on reference stake 9, and bed course 7 is
Spray the concrete topping formed.
The gauge stand of displacement measuring instrument 8 is installed on datum line beam 10, and specific mounting structure is：The table of displacement measuring instrument 8
Seat is magnet base, and for gauge stand magnetic on datum line beam 10, anchor pole 1 is additionally provided with the amount of pulling out in the body of rod between girder 5 and bed course 7
Piece 11 is surveyed, anchor pole 1 can also be arranged on the body of rod between girder 5 and ground by pulling out measurement piece 11, pulled out measurement piece 11 and be
Steel disc, pulls out measurement piece 11 and is horizontally disposed with, and the upper surface for pulling out measurement piece 11 is in contact with the indicator of displacement measuring instrument 8, wears
Core type jack 3 is used to loading the load of anchor pole pullout tests, displacement measuring instrument 8 be used to measuring anchor pole 1 on the amount of pulling out.
In the present embodiment, anchor pole 1 is made of two reinforcing bars being arranged in parallel, and the center line of two reinforcing bars is exactly anchor pole 1
Center line, anchor pole 1 can also use a reinforcing bar or three reinforcing bars etc., and during more reinforcing bars, the center line of more reinforcing bars is exactly anchor
The center line of bar 1.
Reference stake 9 is four, is set in symmetry shape two-by-two, and datum line beam 10 is two, and each datum line beam 10 is erected at
On symmetrically arranged a pair of reference stake 9, displacement measuring instrument 8 is also two, respectively positioned at the left and right sides of anchor pole 1, in symmetrical
Shape is distributed.
In the present embodiment, the distance between two inner sides of reaction support 6 and inner side S1>=4B and >=6d and>2.0m, wherein,
B is the width of reaction support, and d is the bore diameter of anchor pole；The distance between the center and anchor pole center of each reference stake 9 S2
>2.0m；Beeline S between the center of each reference stake 9 and reaction support3>=1.5B and>2.0m, wherein, B is counter-force
The width of bearing.
The installation method of the support beam counterforce device of above-mentioned anchor pole pullout tests, this method comprises the following steps：
(1), reference stake 9, datum line beam 10, reaction support 6, girder 5, backing plate 4, centre-hole jack 3, work are installed successively
Have anchor 2 and displacement measuring instrument 8；
(2), the upper end of anchor pole 1 is from bottom to top successively at the center of girder 5, backing plate 4, centre-hole jack 3 and instrument
Anchor 2 passes through, and the compression face of the axis and moveable anchor 2, centre-hole jack 3 of anchor pole 1 is perpendicular；
(3), the moveable anchor 2 of anchor pole 1 is locked, and places displacement measuring instrument 8；
Ensure during installation：The distance between two inner sides of reaction support 6 and inner side S1>=4B and >=6d and>2.0m, it is each
The distance between the center and anchor pole center of root reference stake 9 S2>2.0m, between the center of each reference stake 9 and reaction support
Beeline S3>=1.5B and>2.0m
Wherein, B is the width of reaction support, and d is the bore diameter of anchor pole.
Bearing foundation elasticity theoretical analysis
1885 Bu Xinneisike (J.Boussinesq) be proposed with elastic theory in semi-infinite half-space surface of elastomer
When upper effect has vertical concentrated force P, the stress analysis solution in elastomer caused by arbitrary point, the theoretical calculation of the utility model
On this basis.
It is now assumed that pullout tests load is 500kN, soil deformation modulus is 30MPa, and Poisson's ratio 0.25, calculates counter-force branch
Under the conditions of seat width is 1m, soil body vertical attached power and ground epitope under different bearing inside clearance condition lower bolt central points
Move.
For soil body vertical attached power calculation diagram as shown in figure 3, ghcd is rectangle bearing load face in figure, m is in anchor pole
Heart point.According to Bu Xinneisike Solution of Elasticity Theory, the vertical attached power below m points at any depth z is 4 rectangle bases
Bottom (4 rectangular bases are respectively mfhb, mfga, mbce, made) is to the sum of vertical attached power caused by m points, i.e.,：
σz=(Ks(mfhb)-Ks(mfga)+Ks(mbce)-Ks(made))p
In formula, p is the evenly load (kPa) on ghcd rectangular loads face；Ks be respectively rectangle mfhb, mfga, mbce,
The angle point stress coefficient of made, can be calculated by following formula：
In formula,Wherein l is the long side of rectangle, and b is the short side of rectangle.
Similarly, according to Bu Xinneisike Solution of Elasticity Theory, the surface displacement at m points is：
S=sm(mfhb)-sm(mfga)+sm(mbce)-sm(made)
In formula, SmThe surface displacement that respectively rectangle mfhb, mfga, mbce, made is produced at m points, can pass through following formula
Calculate：
In formula, μ is soil's Poisson ratio；E0For soil deformation modulus.
Consider bilateral bearing load, then soil body vertical attached power can be pressed respectively with surface displacement under anchor pole central point m
Formula calculates：
σz=2 (Ks(mfhb)-Ks(mfga)+Ks(mbce)-Ks(made))p
S=2 (sm(mfhb)-sm(mfga)+sm(mbce)-sm(made))
Soil body vertical attached power result of calculation is as shown in table 1, is vertically added according to the soil body that the result of calculation of table 1 is drawn
Stress and depth curve figure are as shown in Figure 4.
Table 1：Soil body vertical attached power under different bearing inside clearance condition lower bolt central points
Surface displacement result of calculation is as shown in table 2, the reaction support inside clearance and earth's surface drawn according to the result of calculation
Displacement corresponding curve diagram is as shown in Figure 5.
Table 2：Different bearing inside clearance condition lower bolt central spot surface displacements
Soil body vertical attached power and earth's surface under the comprehensive different bearing inside clearance condition lower bolt central points obtained
Displacement list is as shown in table 3.
Table 3：Soil body vertical attached power and surface displacement one under different bearing inside clearance condition lower bolt central points
Look at table
From table 3 it can be seen that under the conditions of reaction support width 1m, it is net between anchor pole central point on the inside of reaction support
Away from for 2m when, i.e., clear distance is 4m between two reaction supports at this time, and reaction support load is maximum in the soil body that anchor pole central spot produces
Vertical attached power is 7.2kPa, it is 2.88% by the ratio of evenly load with reaction support, and the surface displacement of generation is
2mm, influence is smaller, therefore detecting at the scene can be determined as being more than or equal to 4B in work and be more than by two reaction support inside clearances
2.0m.And the bore diameter of usually anchor pole is smaller, so determining on the inside of two reaction supports the distance between inner side S1≥4B
And >=6d and>2.0m, wherein, B is the width of reaction support, and d is the bore diameter of anchor pole.
Above-described embodiment of the utility model is not the restriction to scope of protection of the utility model, the reality of the utility model
Mode not limited to this is applied, all this kind the above according to the present utility model, according to the ordinary technical knowledge of this area and used
With means, under the premise of the above-mentioned basic fundamental thought of the utility model is not departed from, the utility model said structure is made its
The modification, replacement or change of its diversified forms, should all fall within the scope of protection of the utility model.
Claims (8)
1. the support beam counterforce device of anchor pole pullout tests, anchor pole (1) is vertically arranged, and rock-soil layer is stretched into the lower end of anchor pole (1)
In, it is characterised in that：Described device includes moveable anchor (2), the punching set gradually from top to bottom along anchor pole (1) axial direction
Jack (3), backing plate (4) and girder (5), described device further include reaction support (6), displacement measuring instrument (8), reference stake
(9) and datum line beam (10), the reaction support (6) are two, symmetrical shape distribution, and each reaction support (6) is vertical
To setting, two reaction supports (6) are both placed on bed course (7) or ground, and the girder (5) is laterally set, and girder (5) is held
Support on two reaction supports (6), the upper end of anchor pole (1) from bottom to top successively at the center of the girder (5), backing plate (4),
Centre-hole jack (3) and moveable anchor (2) pass through, and the top of anchor pole (1) is stretched out from moveable anchor (2), and moveable anchor (2) clamps
Anchor pole (1), the reference stake (9) and datum line beam (10) are respectively positioned on the lower section of girder (5), and the reference stake (9) is set in pairs
Put, reference stake (9) squeezes into bed course (7) or rock-soil layer, and datum line beam (10) is erected on reference stake (9), the displacement measuring instrument
(8) gauge stand is installed on datum line beam (10), and the anchor pole (1) is in the body of rod between girder (5) and bed course (7) or ground
It is additionally provided with to pull out and measures piece (11), described pulling out measures piece (11) and be horizontally disposed with, and pulls out the upper surface and position for measuring piece (11)
The indicator of shift measurement instrument (8) is in contact, and the centre-hole jack (3) is used for the load for loading anchor pole pullout tests, described
Displacement measuring instrument (8) be used for measure anchor pole (1) on the amount of pulling out.
2. the support beam counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：The anchor pole
(1) it is made of two reinforcing bars being arranged in parallel, the center line of two reinforcing bars is exactly the center line of anchor pole (1).
3. the support beam counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：The benchmark
Stake (9) is four, is set in symmetry shape two-by-two, and the datum line beam (10) is two, and each datum line beam (10) is erected at
On symmetrically arranged a pair of reference stake (9), the displacement measuring instrument (8) is also two, respectively positioned at the left and right of anchor pole (1)
Both sides, are distributed in symmetry shape.
4. the support beam counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：The displacement is surveyed
The gauge stand for measuring instrument (8) is magnet base, and gauge stand magnetic is on datum line beam (10).
5. the support beam counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：The amount of pulling out
It is steel disc to survey piece (11).
6. the support beam counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：It is described two anti-
The distance between on the inside of power bearing (6) and inner side S1>=4B and >=6d and>2.0m, wherein, B is the width of reaction support, and d is anchor
The bore diameter of bar.
7. the support beam counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：Each foundation is accurate
The distance between the center and anchor pole center of stake (9) S2>2.0m。
8. the support beam counterforce device of anchor pole pullout tests according to claim 1, it is characterised in that：Each foundation is accurate
Beeline S between the center of stake (9) and reaction support3>=1.5B and>2.0m, wherein, B is the width of reaction support.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721089926.8U CN207348113U (en) | 2017-08-29 | 2017-08-29 | The support beam counterforce device of anchor pole pullout tests |
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|---|---|---|---|
| CN201721089926.8U CN207348113U (en) | 2017-08-29 | 2017-08-29 | The support beam counterforce device of anchor pole pullout tests |
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| CN207348113U true CN207348113U (en) | 2018-05-11 |
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ID=62411997
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514018A (en) * | 2017-08-29 | 2017-12-26 | 广东省建筑科学研究院集团股份有限公司 | The support beam counterforce device and its installation method of anchor pole pullout tests |
-
2017
- 2017-08-29 CN CN201721089926.8U patent/CN207348113U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514018A (en) * | 2017-08-29 | 2017-12-26 | 广东省建筑科学研究院集团股份有限公司 | The support beam counterforce device and its installation method of anchor pole pullout tests |
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