CN106644755A - In-situ test device and method for contact surface strength of reinforced soil plant cushion - Google Patents
In-situ test device and method for contact surface strength of reinforced soil plant cushion Download PDFInfo
- Publication number
- CN106644755A CN106644755A CN201610935919.9A CN201610935919A CN106644755A CN 106644755 A CN106644755 A CN 106644755A CN 201610935919 A CN201610935919 A CN 201610935919A CN 106644755 A CN106644755 A CN 106644755A
- Authority
- CN
- China
- Prior art keywords
- box
- shear
- gear
- draw
- reinforced earth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
Abstract
The invention discloses an in-situ test device and method for the contact surface strength of a reinforced soil plant cushion. The problem that the existing equipment and method cannot directly measure the contact strength between the reinforced soil plant cushion and a soil body is solved, the in-situ shearing strength test of the contact surface between the reinforced soil plant cushion and the soil body can be performed on the spot to obtain the contact surface strength, the basic data is provided for the stability analysis of the reinforced soil plant cushion, and besides, a reference basis is also provided for the design of the reinforced soil plant cushion; in the test, the reinforced soil plant cushion does not need to be sampled, the interaction among a plant root system, an earthwork cushion and the soil body is not destroyed, and the original features of the contact surface between the reinforced soil plant cushion and the soil body are reserved; the operation is simple, the quality is controllable, and the repeatability is high.
Description
Technical field
The present invention relates to a kind of reinforced earth plant pad interface strength in-situ testing device and method, belong to reinforcement plant soil
Mechanical characteristic detection technique field.
Background technology
Root system of plant includes anchorage effect and shallow-layer reinforced action to the booster action of soil strength, and in slope plant root
Reinforcement pad is added in system can be with the higher intensity of the producing ratio original position soil body to form reinforced earth plant pad, and reinforced earth plant pad is to protecting
The generation of stability of slope and prevention soil and water loss phenomenon is held, the balance of the ecosystem is safeguarded, is acted on and good with important
Prospect, therefore when reinforcement plant soil this frontier of physico-mechanical properties is studied, it would be highly desirable to it is a kind of directly effective, feasible reliable
The method of the accurate intensity level of measurement plant reinforced earth.
Reinforced earth plant pad interface strength is to weigh an important parameter of plant reinforced earth side slope reinforcement effect,
Interface strength is obtained, can be that the stability analysis of reinforced earth plant pad provides the foundation data, while being also reinforced earth plant pad
Design provide reference frame.But, compared with single earthwork material soil or single plant turf, reinforcement plant soil
The spatial distribution of root system is increasingly complex, and the globality of soil body surface, tear resistance and overall scour resistance are also particularly important, because
This directly carries out test measurement to the sampling of reinforcement plant soil, the phase that will certainly be destroyed between root system of plant-geotechnique pad-soil body three
Interaction, changes the original state feature of reinforced earth plant pad and soil body contact surface.
The content of the invention
In order to solve above-mentioned technical problem, the invention provides.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of reinforced earth plant pad interface strength in-situ testing device, including shear box, cover plate, load measurement device and
Draw-gear；The cover plate is arranged on shear box in box, and load thing is pressed with the cover plate, of box on the shear box
Side is sequentially connected load measurement device and draw-gear, is provided with another side relative with connection load measurement device
Displacement measuring device.
The cover plate is consistent with box cavity cross section on shear box.
Box cavity cross section is consistent with box cavity cross section under shear box on the shear box.
The bottom of the draw-gear is provided with adjusting means, the side of the adjustable draw-gear tractive force of the adjusting means
To.
A kind of method of testing of reinforced earth plant pad interface strength in-situ testing device, comprises the following steps,
Step 1, in the box press-in soil body under shear box, will make shear surface on shear box under box and shear box between box and plus
Contact surface between muscle soil plant pad and the soil body is flushed；
Step 2, cover plate is put on shear box in box, and the load thing in pressure at cover plate central；
Step 3, a side of box is sequentially connected load measurement device and draw-gear on shear box, and is connected load
Measurement apparatus arrange displacement measuring device on another relative side；
Step 4, starts draw-gear, makes the tractive force that draw-gear is produced act on the center of box side on shear box
And the center for passing through shear surface, make box movement on shear box；
Step 5, records the numerical value of load measurement device, and its peak value measured is total shear value；Record displacement measurement dress
The value put, according to shear box size and shift value the section of shear is calculated；
Step 6, according to total shear value and the section of shear shearing strength value is calculated.
The beneficial effect that the present invention is reached：Instant invention overcomes existing equipment cannot the plant of direct measurement reinforced earth with method
The problem of thing pad and soil body contact strength, may be implemented in live original position carries out reinforced earth plant pad and soil body contact surface shearing strength
Test, obtains interface strength, is that the stability analysis of reinforced earth plant pad provides the foundation data, while being also reinforced earth plant
The design of pad provides reference frame；Reinforced earth plant pad need not be sampled in test, not destroy root system of plant-geotechnique
Interaction between pad-soil body three, remains the original state feature of reinforced earth plant pad and soil body contact surface, simple to operate,
It is quality controllable, repeatable strong.
Description of the drawings
Fig. 1 is the structural representation of apparatus of the present invention.
Fig. 2 is the top view of apparatus of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As illustrated in fig. 1 and 2, a kind of reinforced earth plant pad interface strength in-situ testing device, including shear box, cover plate
12nd, load measurement device 10, displacement measuring device 9 and draw-gear 5；Cover plate 12 is arranged on shear box in box 2, the cover plate
Load thing 11 is pressed with 12, a side of box 2 is sequentially connected load measurement device 10 and draw-gear 5 on shear box, with company
Setting displacement measuring device 9 on another relative side of load measurement device 10 is connect, the bottom of draw-gear 5 is provided with regulation
Device 6, adjusting means 6 can adjust the direction of the tractive force of draw-gear 5.
The material of shear box is copper or hard stainless steel, the cavity cross section of box 2 and the cavity of box 3 under shear box on shear box
Cross section is consistent, and internal cavities are cylindricality, and cross section can be rectangle, circular or other suitable shapes, box 2 on shear box
Highly it is not less than 5cm, the height of box 3 is not less than 10cm under shear box.
The material of cover plate 12 is copper or hard stainless steel, and cover plate 12 is consistent with the cavity cross section of box on shear box 2, thick
Degree is not less than 1cm.
Load thing 11 can adopt counterweight, typical circular counterweight to be easy to directly read the total of weight, counterweight and cover plate 12
Vertical load of the weight according to needed for actual condition is selected, and need to only control vertical load for 30kPa～500kPa.
Load measurement device 10 adopts resistive pressure sensor, precision to be selected according to requirement of engineering；Displacement measuring device 9
Using displacement meter, generally using dial gauge, each angle (generally four angles) of the side of box 2 respectively installs one on shear box, with
Whether box 2 has parallel passage on detection shear box, while the numerical value of all displacement meters is recorded, using its mean value as shear displacemant
Value, its precision and range are selected according to requirement of engineering.
Draw-gear 5 adopts loading motor, and the loading motor adopts slowspeed machine, controls its maximum (top) speed less than 12r/
Min, loading motor is changed to adjust loading speed by gear ratio.Loading motor needs to connect a reaction frame 8 when in use,
Reaction frame 8 is more than 40cm with the distance of shear box, to reduce the impact of the soil strength in situ of reaction frame 8 pairs；Reaction frame 8 generally may be used
From angle steel or channel-section steel as active force bar, its embedded depth is not less than 10cm, is not shaken with ensureing that reaction frame 8 itself is firm
It is dynamic.
The adjusting means 6 of the bottom of draw-gear 5 includes cushion block 4 and pin 7, and draw-gear 5 is arranged on cushion block 4, leads to
The angle that pin 7 adjusts the top surface of cushion block 4 is crossed, makes the tractive force that draw-gear 5 is produced act on the center of the side of box 2 on shear box
Place and the center for passing through shear surface, tractive force is not more than 10 degree with shear surface angle.
The method of testing of said apparatus, comprises the following steps：
Step 1, box under shear box 3 is pressed into the soil body, makes the shear surface under box 2 and shear box between box 3 on shear box
And the contact surface between reinforced earth plant pad 1 and the soil body is flushed.
Specifically can adopt with the following method：
At the domatic soil body of required measurement, position to be measured and shape are drawn on domatic according to shear box；
At the position to be measured finished, the soil body on side is excavated downwards with scraper, and be trimmed to cylinder to be sheared；
The cylinder of measurement needed for box 3 is pressed under shear box, makes the shear surface under box 2 and shear box between box 3 on shear box
And the contact surface between reinforced earth plant pad 1 and the soil body is flushed, and ensure to be full of soil body tight under shear box in box 3.
Step 2, cover plate 12 is put on shear box in box 2, and the load thing 11 in the pressure of the center of cover plate 12.
Step 3, a side of box 2 is sequentially connected load measurement device 10 and draw-gear 5 on shear box；Be connected
Displacement measuring device 9 is set on another relative side of load measurement device 10.
Step 4, starts draw-gear 5, the tractive force that draw-gear 5 is produced is acted on shear box in the side of box 2
At the heart and center that passes through shear surface, moves box 2 on shear box.
Step 5, records the numerical value of load measurement device 10, and its peak value measured is total shear value；Record displacement measurement
The value of device 9, according to shear box size and shift value the section of shear is calculated.
Step 6, according to total shear value and the section of shear shearing strength value is calculated.
Specific formula for calculation is as follows：
Wherein, τ is shearing strength；P is total shear value；S is the section of shear.
Instant invention overcomes existing equipment and method cannot direct measurement reinforced earth plant pad 1 and soil body contact strength ask
Topic, may be implemented in live original position carries out reinforced earth plant pad and soil body contact surface shear strength test, obtains interface strength, is
The stability analysis of reinforced earth plant pad 1 provides the foundation data, at the same also for reinforced earth plant pad 1 design provide with reference to according to
According to；Reinforced earth plant pad 1 need not be sampled in test, the phase do not destroyed between root system of plant-geotechnique pad-soil body three
Interaction, remains the original state feature of reinforced earth plant pad 1 and soil body contact surface, simple to operate, quality controllable, repeatability
By force.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of without departing from the technology of the present invention principle, some improvement and deformation can also be made, these improve and deform
Also should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of reinforced earth plant pad interface strength in-situ testing device, it is characterised in that：Including shear box, cover plate, load
Measurement apparatus and draw-gear；The cover plate is arranged on shear box in box, and load thing, the shear box are pressed with the cover plate
One side of upper box is sequentially connected load measurement device and draw-gear, another side relative with connection load measurement device
Displacement measuring device is provided with face.
2. a kind of reinforced earth plant pad interface strength in-situ testing device according to claim 1, it is characterised in that：Institute
State cover plate consistent with box cavity cross section on shear box.
3. a kind of reinforced earth plant pad interface strength in-situ testing device according to claim 2, it is characterised in that：Institute
State box cavity cross section on shear box consistent with box cavity cross section under shear box.
4. a kind of reinforced earth plant pad interface strength in-situ testing device according to claim 1, it is characterised in that：Institute
The bottom for stating draw-gear is provided with adjusting means, the direction of the adjustable draw-gear tractive force of the adjusting means.
5. a kind of method of testing of the reinforced earth plant pad interface strength in-situ testing device being based on described in claim 3, its
It is characterised by：Comprise the following steps,
Step 1, by the box press-in soil body under shear box, makes shear surface and reinforced earth under box and shear box between box on shear box
Contact surface between plant pad and the soil body is flushed；
Step 2, cover plate is put on shear box in box, and the load thing in pressure at cover plate central；
Step 3, a side of box is sequentially connected load measurement device and draw-gear on shear box, and is connected load measurement
Device arranges displacement measuring device on another relative side；
Step 4, starts draw-gear, the tractive force that draw-gear is produced is acted on shear box the center of box side and is led to
The center of shear surface is crossed, box movement on shear box is made；
Step 5, records the numerical value of load measurement device, and its peak value measured is total shear value；Record displacement measuring device
Value, according to shear box size and shift value the section of shear is calculated；
Step 6, according to total shear value and the section of shear shearing strength value is calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610935919.9A CN106644755A (en) | 2016-11-01 | 2016-11-01 | In-situ test device and method for contact surface strength of reinforced soil plant cushion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610935919.9A CN106644755A (en) | 2016-11-01 | 2016-11-01 | In-situ test device and method for contact surface strength of reinforced soil plant cushion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106644755A true CN106644755A (en) | 2017-05-10 |
Family
ID=58821059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610935919.9A Pending CN106644755A (en) | 2016-11-01 | 2016-11-01 | In-situ test device and method for contact surface strength of reinforced soil plant cushion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106644755A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782636A (en) * | 2017-12-04 | 2018-03-09 | 广州大学 | Bituminous mixture aggregate contact strength shearing test device and its test method |
| CN107796550A (en) * | 2017-11-23 | 2018-03-13 | 湖北工业大学 | A kind of device and method for calculating the solid native actual cross-section withdrawal resistance of root system of plant in situ |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2811984Y (en) * | 2005-07-19 | 2006-08-30 | 中国科学院武汉岩土力学研究所 | Reverse pressing type in-situ direct shear apparatus with double shear boxes |
| CN101865802A (en) * | 2010-05-26 | 2010-10-20 | 西安科技大学 | Soil in-situ shear resistance tester |
| CN101876169A (en) * | 2010-05-26 | 2010-11-03 | 西安科技大学 | Method for testing soil shear strength of slope in situ |
| CN201673094U (en) * | 2010-05-27 | 2010-12-15 | 中国科学院武汉岩土力学研究所 | Visual shear test device for soil-structure interactive interfaces |
| CN104977216A (en) * | 2015-07-09 | 2015-10-14 | 北京神州龙鼎科技有限公司 | In situ direct shear apparatus |
-
2016
- 2016-11-01 CN CN201610935919.9A patent/CN106644755A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2811984Y (en) * | 2005-07-19 | 2006-08-30 | 中国科学院武汉岩土力学研究所 | Reverse pressing type in-situ direct shear apparatus with double shear boxes |
| CN101865802A (en) * | 2010-05-26 | 2010-10-20 | 西安科技大学 | Soil in-situ shear resistance tester |
| CN101876169A (en) * | 2010-05-26 | 2010-11-03 | 西安科技大学 | Method for testing soil shear strength of slope in situ |
| CN201673094U (en) * | 2010-05-27 | 2010-12-15 | 中国科学院武汉岩土力学研究所 | Visual shear test device for soil-structure interactive interfaces |
| CN104977216A (en) * | 2015-07-09 | 2015-10-14 | 北京神州龙鼎科技有限公司 | In situ direct shear apparatus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796550A (en) * | 2017-11-23 | 2018-03-13 | 湖北工业大学 | A kind of device and method for calculating the solid native actual cross-section withdrawal resistance of root system of plant in situ |
| CN107796550B (en) * | 2017-11-23 | 2023-09-15 | 湖北工业大学 | Device and method for measuring and calculating pulling resistance of actual section of in-situ plant root system soil |
| CN107782636A (en) * | 2017-12-04 | 2018-03-09 | 广州大学 | Bituminous mixture aggregate contact strength shearing test device and its test method |
| CN107782636B (en) * | 2017-12-04 | 2023-10-31 | 广州大学 | Asphalt mixture aggregate contact strength shear test device and test method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101504334B (en) | Earth arch test apparatus | |
| CN108007800A (en) | A kind of model test apparatus and test method for circulating the sedimentation of the dynamic load soil body | |
| CN105223080B (en) | Evaluation method for jointed rock performance and bolting and grouting effects under compression-shear condition | |
| US6647799B1 (en) | Soil strength measurement for site-specific agriculture | |
| US8380461B2 (en) | Construction modulus testing apparatus and method | |
| CN204590104U (en) | A kind of bath scaled model experimental device of simulating self-balance testing pile method | |
| CN106644755A (en) | In-situ test device and method for contact surface strength of reinforced soil plant cushion | |
| CN106769547A (en) | One kind impact liquefaction test equipment and test method | |
| CN211122294U (en) | Model test device for researching soft clay thermal consolidation effect | |
| CN106680085A (en) | System and method for testing aging characteristics of bolt system on basis of creep testing machine | |
| CN110067267A (en) | Load the whirl spraying steel pipe combination stake simulating lab test device and method of various modes | |
| CN106400857B (en) | For the model equipment and method of the inaccessible degree of soil plug in in-site measurement opening pile | |
| CN109839497A (en) | A kind of indoor standardization device and scaling method for middle coarse granule filling compaction detection depth | |
| CN209690049U (en) | A kind of horizontal dead load test device for CT scan | |
| CN108343099A (en) | The horizontal bearing force test device and test method of stake under dynamic wave pressure | |
| CN110595886B (en) | Model test device and method for researching soft clay thermal consolidation effect | |
| CN109403392B (en) | System and method for measuring and calculating horizontal counter force coefficient of soil body | |
| CN109883822A (en) | A kind of horizontal dead load test device and method for CT scan | |
| CN109098217A (en) | A kind of plug stake of offshore self-elevating drilling platform influences development test device and method to neighbouring shoe | |
| CN210597410U (en) | Foundation detection equipment | |
| CN203745309U (en) | Test system for centrifugal machine test platform | |
| CN205475375U (en) | Sediment thickness detection device at bottom of ultrasonic wave stake | |
| CN205954722U (en) | Spiral ground stake counterforce device | |
| CN208844630U (en) | A kind of plug stake of offshore self-elevating drilling platform influences development test device to neighbouring shoe | |
| CN107728492A (en) | A kind of deformable solution-cavity filling automatic simulation system and emulation mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |