CN109765176A - A kind of device and its application method for testing earthen ruins crack grouting cohesive force - Google Patents
A kind of device and its application method for testing earthen ruins crack grouting cohesive force Download PDFInfo
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- CN109765176A CN109765176A CN201910174405.XA CN201910174405A CN109765176A CN 109765176 A CN109765176 A CN 109765176A CN 201910174405 A CN201910174405 A CN 201910174405A CN 109765176 A CN109765176 A CN 109765176A
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Abstract
The present invention discloses the device and its application method of a kind of rammed earth ruins crack grouting cohesive force measurement.Device is characterized at the upper side of bottom carrying platform that setting upper layer hold-down support, upper layer fixed platform are located on the hold-down support of upper layer, and directional wheel is arranged in the other side, and upper layer mobile platform is located on directional wheel；Hold-down support is equipped with below bottom carrying platform, the bottom end of hold-down support is equipped with leveling nut；WD worm speed reducer and runner are housed on the I-steel of bottom carrying platform welding, device for testing tensile force is connect with pull rod and sliding platform, and digital displaying push-and-pull tensiometer is connected with device for testing tensile force and laptop.The present invention can measure the size of the slurries cohesive force under the conditions of different angle, different in width, the crack of different length and difference grouting process, provide experimental provision and technological means for the actual test of slurries cohesive force in the crack grouting engineering of rammed earth ruins.
Description
Technical field
The invention belongs to earthen ruins crack reinforcing engineering fields, are that a kind of simulation earthen ruins crack grouting adds concretely
After Gu, with the method for device to test crack grouting cohesive force.
Background technique
China's earthen ruins are distributed mainly on northwest arid area, are influenced by construction process and natural environment, earthen ruins sheet
There is the cracks or crack of different form and scale for body.Cranny development makes the ruins soil body be cut into different blocks, leads
Ruins integral strength is caused to reduce, waterproof performance is deteriorated, so that ruins collapse and the aggravation of the extent of the destruction of the diseases such as coombe, influences soil
The stabilization in ruins.
Common building crack reinforcement is more, and slip casting is most important one kind during crack reinforces, and is based on ground work
The theory and method of journey slip casting carry out grouting and reinforcing to earthen ruins crack.After slurries enter crack, under gravity in crack
It flows freely, filled opening, dehydration condenses into Seed harvest, so as to improve the globality and mechanical strength of the ruins soil body.
Earthen ruins grouting and reinforcing belongs to concealment engineering, and the bonding situation of slurries and the soil body generally can not be detected directly, real
The nondestructiving detecting means Indirect evaluations such as Ground Penetrating Radar, contact High Density Resistivity, acoustic wave detection are mostly used in the engineering of border
Slip casting effect, using reference block mechanical property made of slurries evaluation slip casting mechanical property, these test results often with
Slip casting actual conditions are deviated, and slurries also can not be tested directly with the actual cohesive force of the soil body.Therefore, earthen ruins crack is simulated
Grouting test research be it is very necessary, test slurries have great importance with the actual cohesive force of ruins crack soil.
Summary of the invention
In view of above-mentioned, the object of the present invention is to provide a kind of device for testing earthen ruins crack grouting cohesive force, to
In the cohesive force size of test grouting rear slurry and the soil body.
It is another object of the present invention to the methods of use device.
The purpose of the present invention is realized by technological means below:
It is a kind of test earthen ruins crack grouting cohesive force device, be by bottom carrying platform, lower layer's hold-down support, directional wheel,
Hold-down support, upper layer fixed platform, upper layer mobile platform, device for testing tensile force, digital display type pull and push dynamometer, transmission rod, runner, WD
Worm speed reducer composition.Bottom carrying platform is the steel plate of long 100cm, width 40cm, thickness 1cm, and setting upper layer is fixed above steel plate
Platform and upper layer mobile platform, upper layer fixed platform and upper layer mobile platform are in same level, are connected with iron wire；Upper layer is fixed
Support occupy between upper layer fixed platform and bottom carrying platform, directional wheel occupy upper layer mobile platform and bottom carrying platform it
Between, hold-down support is equipped with below bottom carrying platform, the bottom end of lower layer's hold-down support is equipped with leveling nut；With bottom carrying platform
WD worm speed reducer and runner are housed, upper layer mobile platform and device for testing tensile force and transmission rod connect on the I-steel of bottom welding
It connects, transmission rod is connect with WD worm speed reducer, and WD worm speed reducer is connect with runner again, digital displaying push-and-pull tensiometer and tensile test fill
It sets and is connected with laptop.
The method of use device of the present invention is:
(1) it levels: level meter is put on bottom carrying platform, adjust the leveling nut of bottom end 8 of lower layer's hold-down support, make water
Level bubble is placed in the middle, it is ensured that entire test macro is in horizontality.
(2) equipment connects: device for testing tensile force is connect with transmission rod and upper layer mobile platform, digital displaying push-and-pull tensiometer and pulling force
Test device is connected with laptop.
(3) runner is shaken, starting WD worm speed reducer pulls upper layer mobile platform by transmission rod, by transmission rod power transmission,
The deceleration ratio of WD worm speed reducer is 20:1, and hand-rail type runner mean speed is 2 s/r, and the average speed that pull rod advances is
0.025mm/s。
(4) cohesive force is tested: under the action of power transmission draw-bar pull, removing the company between upper layer fixed platform and sliding platform
It connects, with 2 s/r uniform velocity's rotating wheels, separates upper layer fixed platform and upper layer mobile platform.Until earthen ruins and knoll
Mould is fully withdrawn, and obtains soil body cohesive force F by digital displaying push-and-pull tensiometer.
Advantages of the present invention and the beneficial effect of generation are:
The configuration of the present invention is simple, easy to operate, the test suitable for indoor simulation crack grouting cohesive force.It is that one kind can be fast
Speed, after the completion of Accurate Determining slip casting, the device of measurement slurries and soil body cohesive force, the device device for testing tensile force and transmission rod and
The connection of upper layer mobile platform, upper layer mobile platform lower section are equipped with directional wheel, and digital displaying push-and-pull tensiometer and device for testing tensile force pass through number
Aobvious pull and push dynamometer measures soil mass crack slip casting cohesive force.The present invention has been filled up to survey to during rammed earth ruins simulation crack grouting
The blank of slurries cohesive force, the correlative study for slurries Seed harvest cohesive force test in the reinforcing of earthen ruins crack grouting provide one
The new test device of kind.
Detailed description of the invention
Fig. 1 is schematic diagram of the invention；
In figure: 1- leveling nut, 2- lower layer hold-down support, 3- bottom carrying platform, the upper layer 4- hold-down support, 5- directional wheel, 6-
Digital display type pull and push dynamometer, 7- runner, the upper layer 8- fixed platform, the upper layer 9- mobile platform, 10- device for testing tensile force, 11- power transmission
Bar, 12-WD worm speed reducer.
Fig. 2 is test earthen ruins crack grouting bonding force curve.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described further the present invention again:
Digital display type the pull and push dynamometer 6 model HP-3KN, range 3000N, resolution ratio 1N that the present invention uses.
A kind of device measuring rammed earth crack grouting cohesive force is by leveling nut 1, lower layer's hold-down support 2, bottom carrying
Platform 3, directional wheel 5, upper layer hold-down support 4, upper layer fixed platform 8, upper layer mobile platform 9, device for testing tensile force 10, digital display type
Pull and push dynamometer 6, transmission rod 11, runner 7, WD worm speed reducer 12 form.Bottom carrying platform 3 is long 100cm, width 40cm, thickness
The steel plate of 1cm, steel plate top is it is characterized in that bottom carrying platform 2 is the steel plate of long 100cm, width 40cm, thickness 1cm, steel plate top
Setting upper layer fixed platform 8 and upper layer mobile platform 9, upper layer fixed platform 8 and upper layer mobile platform 9 are in same level, use
Iron wire connection；Upper layer hold-down support 4 occupy between upper layer fixed platform 8 and bottom carrying platform 3, and directional wheel 5 occupy upper layer shifting
Between moving platform 9 and bottom carrying platform 3, lower layer's hold-down support 2, the bottom end of hold-down support 2 are equipped with below bottom carrying platform 3
Equipped with leveling nut 1；WD worm speed reducer 12 and runner 7, upper layer are housed on the I-steel of 3 bottom of bottom carrying platform welding
Mobile platform 8 is connect with device for testing tensile force 10 and transmission rod 11, and transmission rod 11 is connect with WD worm speed reducer 12, and WD turbine subtracts
Fast machine 12 is connect with runner 7 again, digital displaying push-and-pull tensiometer 6 is connected with device for testing tensile force 10 and laptop.
It is in implementation process, site operation is native by 13.5% test preparation of optimum moisture content with soil, it boils in a covered pot over a slow fire to adopting after 24 hours
Knoll is rammed with 30cm × 30cm × 30cm mold.Knoll volume is 1dm.3.It places 3 months in its natural state, to knoll
It is completely dry to be placed in upper layer fixed platform 8 and upper layer mobile platform 9, rammed earth ruins crack is simulated using earthen ruins and knoll.
To crack wall soil at both sides shaving, make the crack wall soil body closer to engineering reality.Grouting serous fluid is pressed using imitation frosted glass slurry stone and silt
1:25 mixing, 0.45 the ratio of mud, stir the stirring that picks and be slurried.This test adjusts Fracture Width 3cm, inclination angle is 90 ° (according to reality
It is required that Fracture Width, length and crack dip are adjustable), upper layer mobile platform 8 and upper layer fixed platform 9 are fixed using iron wire,
Start by certain construction technology to crack grouting, start the test of knoll cohesive force after slurries are filled and dried in the shade:
(1) it levels: level meter is put on bottom carrying platform 3, adjust the leveling nut 1 of bottom end 8 of lower layer's hold-down support 2,
Keep level vial placed in the middle, verifies upper layer fixed platform 8 after leveling and whether sliding platform 9 is horizontal, it is ensured that entire test macro
In horizontality.
(2) equipment connects: device for testing tensile force 10 is connect with transmission rod 11 and upper layer mobile platform 9, digital displaying push-and-pull tensiometer 6
It is connected with device for testing tensile force 10 and laptop.
(3) runner 7 is shaken, starting WD worm speed reducer 12 pulls upper layer to move by transmission rod 11, by 11 power transmission of transmission rod
Moving platform 9, the deceleration ratio of WD worm speed reducer 12 are 20:1, and 7 mean speed of hand-rail type runner is 2 s/r, before pull rod 10
Into average speed be 0.025mm/s.
(4) cohesive force is tested: under the action of 11 pulling force of transmission rod, being removed between upper layer fixed platform 8 and sliding platform 9
Connection separates upper layer fixed platform 8 and upper layer mobile platform 9 at the uniform velocity with 2 s/r speed rotating wheels 11.Until earthen ruins
It is fully withdrawn with knoll mould, soil body cohesive force F is obtained by digital displaying push-and-pull tensiometer 9.It is as shown in Figure 2: crest value tension FmaxAnd remnants
Pulling force Fmin, soil body cohesive force size calculation formula are as follows:
F=Fmax-Fmin
As shown in Fig. 2, test curve FmaxFor 31N, FminFor 3N, then the cohesive force of the soil body is 28N.
Claims (2)
1. a kind of device for measuring rammed earth crack grouting cohesive force is by bottom carrying platform (2), upper layer hold-down support (3), determines
It is pushed away to wheel (4), hold-down support (5), upper layer fixed platform (6), upper layer mobile platform (7), device for testing tensile force (8), digital display type
Tensiometer (9), pull rod (10), runner (11), WD worm speed reducer (12) composition, it is characterized in that bottom carrying platform (2) is length
The steel plate of 100cm, width 40cm, thickness 1cm, steel plate top setting upper layer fixed platform (6) and upper layer mobile platform (7), upper layer is solid
Fixed platform (6) and upper layer mobile platform (7) are in same level, are connected with iron wire；Upper layer hold-down support (3) occupy upper layer and fixes
Between platform (6) and bottom carrying platform (2), directional wheel (4) occupy upper layer mobile platform (7) and bottom carrying platform (2) it
Between, it is equipped with hold-down support (5) below bottom carrying platform (2), the bottom end of hold-down support (5) is equipped with leveling nut (1)；With bottom
Carrying platform (2) bottom welding I-steel on be equipped with WD worm speed reducer (12) and runner (11), upper layer mobile platform (7) and
Device for testing tensile force (8) and pull rod (10) connection, pull rod (10) are connect with WD worm speed reducer (12), WD worm speed reducer (12)
It is connect again with runner (11), digital displaying push-and-pull tensiometer (9) is connected with device for testing tensile force (8) and laptop.
2. the method using a kind of device for measuring rammed earth crack grouting cohesive force described in claim 1 is:
(1) it levels: level meter is put on bottom carrying platform (3), adjust the leveling spiral shell of bottom end 8 of lower layer's hold-down support (2)
Female (1), keeps level vial placed in the middle, and upper layer fixed platform (8) are verified after leveling and whether sliding platform (9) is horizontal, it is ensured that is whole
A test macro is in horizontality；
(2) equipment connects: device for testing tensile force (10) is connect with transmission rod (11) and upper layer mobile platform (9), digital display push-pull effort
Meter (6) is connected with device for testing tensile force (10) and laptop；
(3) runner (7) are shaken, starting WD worm speed reducer (12) is pulled by transmission rod (11), by transmission rod (11) power transmission
Layer mobile platform (9), the deceleration ratio of WD worm speed reducer (12) are 20:1, hand-rail type runner (7) mean speed be 2 s/
R, the average speed that pull rod (10) advances are 0.025mm/s；
(4) cohesive force is tested: under the action of transmission rod (11) pulling force, removing the company between upper layer fixed platform 8 and sliding platform 9
It connects, at the uniform velocity with 2 s/r uniform rotation runners (7), separates upper layer fixed platform (8) and upper layer mobile platform (9), until soil is lost
Location is fully withdrawn with knoll mould, obtains soil body cohesive force F by digital displaying push-and-pull tensiometer (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910174405.XA CN109765176A (en) | 2019-03-08 | 2019-03-08 | A kind of device and its application method for testing earthen ruins crack grouting cohesive force |
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| CN201910174405.XA CN109765176A (en) | 2019-03-08 | 2019-03-08 | A kind of device and its application method for testing earthen ruins crack grouting cohesive force |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116067969A (en) * | 2022-12-08 | 2023-05-05 | 兰州大学 | Nondestructive testing and evaluating method for grouting reinforcement effect of earthen site cracks |
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2019
- 2019-03-08 CN CN201910174405.XA patent/CN109765176A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116067969A (en) * | 2022-12-08 | 2023-05-05 | 兰州大学 | Nondestructive testing and evaluating method for grouting reinforcement effect of earthen site cracks |
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