CN205669219U - A kind of spread foundation full scale test device - Google Patents
A kind of spread foundation full scale test device Download PDFInfo
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- CN205669219U CN205669219U CN201620552431.3U CN201620552431U CN205669219U CN 205669219 U CN205669219 U CN 205669219U CN 201620552431 U CN201620552431 U CN 201620552431U CN 205669219 U CN205669219 U CN 205669219U
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- foundation
- spread foundation
- power transmission
- spread
- full scale
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- 238000012360 testing method Methods 0.000 title claims abstract description 79
- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 230000003068 static effect Effects 0.000 claims abstract description 31
- 239000002689 soil Substances 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 18
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims description 19
- 239000011888 foil Substances 0.000 claims description 12
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a kind of spread foundation full scale test device, including foundation ditch, the Foundation pressure measurement apparatus being embedded in back fill course it is provided with bottom foundation ditch, it is placed with spread foundation test specimen above described Foundation pressure measurement apparatus, described spread foundation test specimen top is provided with power transmission short column, being provided with strain gauge means on spread foundation test specimen, also include hydraulic static pile pressing machine, the jaw of hydraulic static pile pressing machine accompanies the power transmission plain concrete pile being positioned at above power transmission short column.This utility model uses hydraulic static pile pressing machine to instead of reaction frame jack system, is effectively improved the conventional efficient for aspect ratio concrete spread foundation full scale test, cost-effective and decrease the time；Show that should be provided above thickness at steel chord type soil pressure cell is 4 to 10 centimetres of fine sands, makes stress be distributed very well, increase test accuracy；It is welded with Rigid Plates Under Compression at spread foundation test specimen top, is possible not only to simulate pillar cross section, also the uniform load that biography column is given is passed to spread foundation test specimen.
Description
Technical field
This utility model relates to the concrete spread foundation design field of a kind of transmission line of electricity, is specifically related to a kind of extension base
Plinth full scale test device.
Background technology
At present, concrete spread foundation is one of principal mode of electric power line steel tower.During UHV transmission line is built, base
Plinth cost accounts for the 16% ~ 20% of overall investment, and therefore the optimization design on basis plays an important role with cost for saving the duration.
Reduce the cutting depth of foundation soil, i.e. reduce the height of footing step, can be significantly for economic angle
Reduce cost, and can accelerate the duration.But, concrete spread foundation strictly observes step width in existing national sector standard
The requirement less than 2.5 of the high ratio, so reducing the height of footing step, the width height ratio of steps of concrete spread foundation will exceed
Specification limit.And using concrete spread foundation when, owing to downforce is increasing, and part geological condition ground
Base low bearing capacity, sole plate area generally requires increase.It practice, the limit that concrete spread foundation the ratio of width to height is less than 2.5
Value is that the demand supposed based on the distribution of foundation bottom stress plane section is set out, and breaks through at present concrete spread foundation step width
High than the requirement limited, need the sub-grade reaction distribution to the width height ratio of steps aspect ratio concrete spread foundation more than 2.5
Situation research experiment, preferably to recognize mechanical characteristic and the sub-grade reaction distribution rule on this class basis.
For aspect ratio concrete spread foundation, outdoor full scale test more can reflect its true stress objectively
Characteristic, but, traditional concrete spread foundation full scale test device employing is set up jack reaction frame system and is carried as adding
Put, if for the concrete spread foundation of aspect ratio, then need to set up reaction frame and jack on a large scale, not only waste
Time nor economical, add the cost of full scale test.
Utility model content
Technical problem to be solved in the utility model is for traditional concrete spread foundation full scale test device
Defect, it is provided that a kind of spread foundation full scale test device, solves traditional concrete spread foundation full scale test device to width
High when testing than the spread foundation more than 2.5, need to set up reaction frame and jack on a large scale and cause and lose time, increase
The problem of Accelerated Life cost.
This utility model is achieved through the following technical solutions: a kind of spread foundation full scale test device, including foundation ditch, described
It is provided with the Foundation pressure measurement apparatus being embedded in back fill course bottom foundation ditch, is placed with above described Foundation pressure measurement apparatus
Spread foundation test specimen, described spread foundation test specimen top is provided with power transmission short column, spread foundation test specimen is provided with strain measurement
Device, also includes that hydraulic static pile pressing machine, the jaw of described hydraulic static pile pressing machine accompany the power transmission being positioned at above power transmission short column
Plain concrete pile.In prior art, advise with sub-grade reaction distribution to detect the mechanical characteristic of concrete spread foundation objectively
Rule, the most all uses full scale test, and traditional concrete spread foundation full scale test uses loading equipemtn to be reaction frame and very heavy
Top, but, the concrete spread foundation to aspect ratio, the concrete i.e. short than general concrete spread foundation, floor space is big
Spread foundation, when carrying out full scale test, traditional concrete spread foundation full scale test loading system then needs large-area taking
Build reaction frame and jack, not only lose time, and increase experimentation cost, make the efficiency of full scale test reduce.For understanding
Certainly the problems referred to above, this utility model provides a kind of device that aspect ratio concrete spread foundation carries out full scale test, should
Device use hydraulic static pile pressing machine as charger, Practical Project acts on concrete foundation top axial pressure or
Eccentricity pressure can be simulated by the vertical static pressure that hydraulic static pile pressing machine produces, and hydraulic static pile pressing machine relatively reaction frame has
When having conveniently moving, low cost, construction, noiselessness, friction, free of contamination advantage, not only shorten the time of full scale test
Also a saving experimentation cost.Power transmission plain concrete pile is clamped, at the bottom of power transmission plain concrete pile by the jaw of hydraulic static pile pressing machine
Portion is by power transmission short column top imposed load, thus to spread foundation test specimen imposed load, is arranged on spread foundation test specimen
Strain gauge means can precisely measure out the strain that spread foundation test specimen is occurred, be arranged on bottom spread foundation test specimen
Foundation pressure measurement apparatus can obtain the sub-grade reaction distribution of spread foundation test specimen, just can be to coagulation by above-mentioned data
The soil mechanical characteristic of spread foundation, strain regime are analyzed with sub-grade reaction distribution, to judge that concrete spread foundation width is high
Can limit value more than 2.5 than whether.
Further, equivalently-sized groove, institute it are provided with bottom described power transmission short column top and power transmission plain concrete pile
Being provided with pressure transducer in stating groove, described pressure transducer connects piezometry instrument.When power transmission short column top and biography
Bottom power plain concrete pile during contact, the groove inner shell of formation arranges pressure transducer, and the size of pressure transducer is preferably with recessed
Groove size matches, and the pressure transducer when loading can be avoided to be moved, after setting pressure transducer, by external pressure
Force detector device can survey the size of every grade of load, it is simple in loading procedure, controlled loading speed makes load stable.It addition,
Pressure transducer can also be arranged between the jaw of hydraulic static pile pressing machine and power transmission plain concrete pile, power transmission short column and extension
Between the test specimen of basis, lie in a horizontal plane in inside power transmission plain concrete pile or power transmission short column.
Further, the rigidity identical with power transmission short column diameter it is provided with between described power transmission short column and spread foundation test specimen
Pressing plate.Weld one piece of Rigid Plates Under Compression suitable with power transmission short column size at spread foundation test specimen top, Rigid Plates Under Compression is possible not only to use
Simulate pillar cross section, also act as by pass column to uniform load pass to the effect of spread foundation test specimen.
Further, described strain gauge means includes foil gauge, and described foil gauge connects static strain measuring instrument.Root
According to the ratio of width to height of spread foundation test specimen, reasonably arranging foil gauge around spread foundation test specimen, foil gauge transfers data to
External strain gauge, by strain gauge it is observed that spread foundation test specimen institute after the load transmitted by top
The strain produced.Foil gauge in use, needs the most levelling on concrete, and cleans dry with acetone by the position needing monitoring
Only.
Further, described static strain measuring instrument uses DH3816 static strain measuring instrument software.Use static strain
Measuring instrument software automatically can record data in computer and be analyzed, thus reduces the workload of operator.
Further, it is provided with C10 concrete cushion between described spread foundation test specimen and back fill course.C10 concrete
Uniform load bottom spread foundation test specimen is applied to bottom by bed course, it is simple to gather the counter-force bottom spread foundation test specimen.
Further, described Foundation pressure measurement apparatus is steel chord type soil pressure cell, and described steel chord type soil pressure cell connects
There is vibrating wire frequency measurer.It is permissible that the Foundation pressure that steel chord type soil pressure cell and vibrating wire frequency measurer form measures system and device
Measure the counter-force bottom spread foundation test specimen.
Further, described steel chord type soil pressure cell is provided above fine sand, and the thickness of described fine sand is 4 to 10 centimetres.
Be found by experiment that, when testing the stress between two kinds of different materials, be covered with above steel chord type soil pressure cell thickness 4 to
The fine sand of 10 centimetres can avoid stress to concentrate, it is simple to stress distribution.
Further, being provided with fine sand below described steel chord type soil pressure cell, the thickness of described fine sand is 2 to 5 centimetres.For
Prevent the cause influence test accuracy of soil property bottom foundation ditch, bottom foundation ditch and between steel chord type soil pressure cell, be equipped with 2 to 5
Centimetre fine sand.
This utility model compared with prior art, has such advantages as and beneficial effect:
1, this utility model uses hydraulic static pile pressing machine to instead of reaction frame and jack system, is effectively improved pin
Conventional efficient to aspect ratio concrete spread foundation full scale test, provides cost savings and decreases the time；
2, this utility model show that by practice should be provided above thickness at steel chord type soil pressure cell is 4 to 10 centimetres
Fine sand, makes stress be distributed very well, adds the precision of test；
3, this utility model welds the Rigid Plates Under Compression that one piece of size is suitable with force-transmitting pole size at spread foundation test specimen top, no
Only can be used to simulate pillar cross section, also act as by pass column to uniform load pass to the effect of spread foundation test specimen.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by this utility model embodiment, constitutes the one of the application
Part, is not intended that the restriction to this utility model embodiment.In the accompanying drawings:
Fig. 1 is this utility model structural representation.
The parts title of labelling and correspondence in accompanying drawing:
1-hydrostatic pile press machine, 2-power transmission plain concrete pile, 3-pressure transducer, 4-piezometry instrument, 5-power transmission
Short column, 6-Rigid Plates Under Compression, 7-static strain measuring instrument, 8-vibrating wire frequency measurer, 9-foil gauge, 10-steel chord type soil pressure cell,
11-spread foundation test specimen, 12-concrete cushion, 13-fine sand, 14-back fill course.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and explanation thereof are only used for explaining this
Utility model, is not intended as restriction of the present utility model.
Embodiment
As it is shown in figure 1, this utility model one spread foundation full scale test device, including foundation ditch, set bottom described foundation ditch
It is equipped with the Foundation pressure measurement apparatus being embedded in back fill course 14, above described Foundation pressure measurement apparatus, is placed with spread foundation
Test specimen 11, described spread foundation test specimen 11 top is provided with power transmission short column 5, and spread foundation test specimen 11 is provided with strain measurement dress
Put, also include that hydraulic static pile pressing machine 1, the jaw of described hydraulic static pile pressing machine 1 accompany the power transmission being positioned at above power transmission short column 5
Plain concrete pile 2.Further, be provided with bottom described power transmission short column 5 top and power transmission plain concrete pile 2 equivalently-sized recessed
Groove, is provided with pressure transducer 3 in described groove, described pressure transducer 3 connects piezometry instrument 4.Further, institute
State and between power transmission short column 5 with spread foundation test specimen 11, be provided with the Rigid Plates Under Compression 6 identical with power transmission short column 5 diameter.Further,
Described strain gauge means includes foil gauge 9, and described foil gauge 9 connects static strain measuring instrument 7.Further, described quiet
State strain gauge 7 uses DH3816 static strain measuring instrument software.Further, described spread foundation test specimen 11 and backfill soil
It is provided with concrete cushion 12 between layer 14.Further, described Foundation pressure measurement apparatus is steel chord type soil pressure cell 10, institute
State steel chord type soil pressure cell 10 connection and have vibrating wire frequency measurer 8.Further, described steel chord type soil pressure cell 10 is provided above
Fine sand 13, the thickness of described fine sand 13 is had to be 4 to 10 centimetres.Further, it is provided with below described steel chord type soil pressure cell 10
Fine sand, the thickness of described fine sand is 2 to 5 centimetres.When using this device, first spreading a layer thickness bottom foundation ditch is 2 centimetres
Fine sand, places steel chord type soil pressure cell 10, steel chord type soil pressure cell according to the concrete condition of spread foundation test specimen 11 on fine sand
10 external type vibration wire frequency testers 8, then fill up the space between steel chord type soil pressure cell 10, back fill course with back fill course 14
14 exceed 5 centimetres than steel chord type soil pressure cell 10, and on string formula soil pressure cell 10, laying depth is the fine sand 13 of 5 centimetres, afterwards
It is provided above C10 concrete cushion 12 at back fill course 14, C10 concrete cushion 12 is placed spread foundation test specimen 11, root
Uniformly placing foil gauge 9 on spread foundation test specimen 11 according to the concrete condition of spread foundation test specimen 11 size, foil gauge 9 is external quiet
State strain gauge 7, static strain measuring instrument 7 uses DH3816 static strain measuring instrument software, and can automatically record and analyze should
Parameter evidence, spread foundation test specimen 11 is provided above Rigid Plates Under Compression 6, Rigid Plates Under Compression 6 power transmission installed above short column 5, power transmission short column 5
Top is provided with groove, placement force sensor 3 in groove, and pressure transducer 3 is connected with piezometry instrument 4, during measurement, makes
The jaw of hydraulic static pile pressing machine 1 clamps power transmission plain concrete pile 2, is provided with groove bottom power transmission plain concrete pile 2, adjusts liquid
The position of pressure static pile press 1 jaw makes the groove at groove alignment power transmission short column 5 top bottom power transmission plain concrete pile 2, logical
Cross hydraulic static pile pressing machine 1 and data that piezometry instrument records are gradually increased load, automatic by static strain measuring instrument
Record and analysis spread foundation test specimen 11 are along with deformation produced by the increase of load, then are surveyed by type vibration wire frequency tester 8
Produce counter-force bottom spread foundation test specimen 11, by these data detect objectively the mechanical characteristic of concrete spread foundation with
Sub-grade reaction distribution rule.
Above-described detailed description of the invention, is entered the purpose of this utility model, technical scheme and beneficial effect
One step describes in detail, be it should be understood that and the foregoing is only detailed description of the invention of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all within spirit of the present utility model and principle, any amendment, the equivalent made are replaced
Change, improvement etc., within should be included in protection domain of the present utility model.
Claims (9)
1. a spread foundation full scale test device, including foundation ditch, is provided with bottom described foundation ditch and is embedded in back fill course (14)
Foundation pressure measurement apparatus, be placed with spread foundation test specimen (11), described extension base above described Foundation pressure measurement apparatus
Plinth test specimen (11) top is provided with power transmission short column (5), and spread foundation test specimen is provided with strain gauge means on (11), and its feature exists
In, also include that hydraulic static pile pressing machine (1), the jaw of described hydraulic static pile pressing machine (1) accompany and be positioned at power transmission short column (5) top
Power transmission plain concrete pile (2).
A kind of spread foundation full scale test device the most according to claim 1, it is characterised in that described power transmission short column (5)
Top and power transmission plain concrete pile (2) bottom are provided with equivalently-sized groove, are provided with pressure transducer in described groove
(3), described pressure transducer (3) connects piezometry instrument (4).
A kind of spread foundation full scale test device the most according to claim 1, it is characterised in that described power transmission short column (5)
Be provided with the Rigid Plates Under Compression (6) identical with power transmission short column (5) diameter between spread foundation test specimen (11).
A kind of spread foundation full scale test device the most according to claim 1, it is characterised in that described strain gauge means
Including foil gauge (9), described foil gauge (9) connects static strain measuring instrument (7).
A kind of spread foundation full scale test device the most according to claim 4, it is characterised in that described static strain is measured
Instrument (7) uses DH3816 static strain measuring instrument software.
A kind of spread foundation full scale test device the most according to claim 1, it is characterised in that described spread foundation test specimen
And between back fill course (14), be provided with concrete cushion (12) (11).
A kind of spread foundation full scale test device the most according to claim 1, it is characterised in that described Foundation pressure is measured
Device is steel chord type soil pressure cell (10), and described steel chord type soil pressure cell (10) connects vibrating wire frequency measurer (8).
A kind of spread foundation full scale test device the most according to claim 7, it is characterised in that described steel chord type soil pressure
Box (10) is provided above fine sand (13), and the thickness of described fine sand (13) is 4 to 10 centimetres.
A kind of spread foundation full scale test device the most according to claim 7, it is characterised in that described steel chord type soil pressure
Box (10) lower section is provided with fine sand, and the thickness of described fine sand is 2 to 5 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620552431.3U CN205669219U (en) | 2016-06-08 | 2016-06-08 | A kind of spread foundation full scale test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620552431.3U CN205669219U (en) | 2016-06-08 | 2016-06-08 | A kind of spread foundation full scale test device |
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| CN205669219U true CN205669219U (en) | 2016-11-02 |
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| CN201620552431.3U Expired - Fee Related CN205669219U (en) | 2016-06-08 | 2016-06-08 | A kind of spread foundation full scale test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862944A (en) * | 2016-06-08 | 2016-08-17 | 国网四川省电力公司经济技术研究院 | Full-scale testing apparatus for spread foundations |
-
2016
- 2016-06-08 CN CN201620552431.3U patent/CN205669219U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862944A (en) * | 2016-06-08 | 2016-08-17 | 国网四川省电力公司经济技术研究院 | Full-scale testing apparatus for spread foundations |
| CN105862944B (en) * | 2016-06-08 | 2017-09-22 | 国家电网公司 | A kind of spread foundation full scale test device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161102 Termination date: 20190608 |
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| CF01 | Termination of patent right due to non-payment of annual fee |