CN110132624A - Grouting system compression performance test device and its method - Google Patents
Grouting system compression performance test device and its method Download PDFInfo
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- CN110132624A CN110132624A CN201910402910.5A CN201910402910A CN110132624A CN 110132624 A CN110132624 A CN 110132624A CN 201910402910 A CN201910402910 A CN 201910402910A CN 110132624 A CN110132624 A CN 110132624A
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- Prior art keywords
- grouting system
- round tube
- circular pipe
- rigid circular
- plate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
Abstract
The invention discloses a kind of grouting system compression performance test device and its methods, belong to building material field.Including flexible round tube, seal block, rigid circular pipe, plate and load cushion block；The flexibility round tube is socketed in rigid circular pipe；The both ends of the flexibility round tube are provided with seal block；For placing grouting system between the seal block；The top of the upper end seal block and the bottom of rigid circular pipe are provided with plate；Fastener is provided between the both ends plate；Load cushion block is provided at the top of the upper end plate, the load cushion block is for connecting pressurizing device.Test result of the present invention is more bonded engineering reality；Data are more fully.
Description
Technical field
The invention belongs to building material fields, and in particular to grouting system compression performance test device and its method.
Background technique
Slurry injection technique uses hydraulic, air pressure or electrochemical method, and slurry is injected into the hole of Rock And Soil, in gap, is made
Rock And Soil becomes the new construction body that intensity is high, stability is good, obtains at present in multiple fields such as water conservancy, building, railway and mining industry
It is widely applied.Grouting pressure is slightly larger than the static 0.1 ~ 0.2MPa of Water And Earth Pressures on the stratum, stratum Water And Earth Pressures usually 0.2 ~
0.3MPa, the case where also having to 0.4MPa.The selection of grouting pressure is appropriate, such as in shield method tunnel construction, synchronous grouting
It will lead to land upheaval according to excessive grouting pressure, section of jurisdiction positional shift is easy spillage；Using too small grouting pressure,
Slurry can not fill up gap or gap filling speed is less than gap and generates speed, then easily cause settlement of foundation.
In existing research, usually only research normal pressure under slurry physical and mechanical property, as the setting time of slurry, consistency,
The intensity etc. of hardened paste also has in simulation mortar depositing construction, under certain pressure effect, the water-retaining property of slurry.In grouting process,
Slurry and Rock And Soil are to gradually form new structural body under pressure, during the formation of new construction body, slurry and ground
Body is an interactional system.When studying mortar depositing construction quality, consider under pressure effect, grouting system physical and mechanical property
It develops more fitting engineering reality, test result and also has more Engineering Guidance meaning.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of that present invention to provide a kind of grouting system compression performance test device and its
Method, to solve the problems, such as the research existing in the prior art only for the physical and mechanical property of slurry under normal pressure.
To achieve the goals above, the present invention adopts the following technical scheme that realize:
A kind of grouting system compression performance test device, including flexible round tube, seal block, rigid circular pipe, plate and loading pad
Block；
The flexibility round tube is socketed in rigid circular pipe；
The both ends of the flexibility round tube are provided with seal block；
For placing grouting system between the seal block；
The top of the upper end seal block and the bottom of rigid circular pipe are provided with plate；
Fastener is provided between the both ends plate；
Load cushion block is provided at the top of the upper end plate, the load cushion block is for connecting pressurizing device.
Further, the fastener includes screw bolt and nut；The bolt is fixed on the plate of lower end；The bolt is worn
Cross upper end plate；Nut is provided on the upper bolt of the upper end plate.
Further, the bolt is evenly distributed on plate.
Further, the internal diameter of the rigid circular pipe is 102 ~ 110mm, is highly 250 ~ 300mm；The rigid circular pipe
The preferred lightweight of material, high-strength, resistance to deformation material, as polymethyl methacrylate (PMMA) is managed；Preferably axially it is divided into two
Half slot, is connected by bolts or cuff connection forms round tube.
Further, the flexible round tube preferably plastics or rubber material waterproof, with certain deformability are made；
The outer diameter of the flexibility round tube is identical as the internal diameter of rigid circular pipe；It is described flexibility round tube with a thickness of 1 ~ 5mm；The flexibility round tube
Height be greater than 10 ~ 50mm of rigid circular pipe.
Further, the seal block and load cushion block are circle；The diameter of the seal block is less than flexible circle
1 ~ 2mm of internal diameter of pipe is highly 30 ~ 50mm；The diameter of the load cushion block is less than 1 ~ 2mm of internal diameter of rigid circular pipe, is highly
300~400mm；The material of the seal block and load cushion block includes polyamide, is lightweight, high-strength, resistance to deformation material.
Further, the plate is circle；Material includes nylon sheet.
Further, high-elastic rubber band is provided between the flexible round tube and seal block to seal, rubber band width 3 ~
15mm, it is easy to disassemble and reusable.
Further, the bolt length is greater than 50 ~ 100mm of rigid circular pipe, 100 ~ 200mm of respective threaded length.
Further, the writing board shape circular of the bolt-connection, the preferred lightweight of material, high-strength, resistance to deformation material,
Bolt is evenly arranged on flat board outer rim, is rigid circular pipe placement region within bolt on plate.
A kind of grouting system compression performance test method, which is characterized in that
The lower part of flexible round tube is put on seal block to be placed in rigid circular pipe；
The soil body is packed into flexible round tube, load cushion block is put into, records soil body elemental height；
Setting load is forced into the soil body, obtains the force-displacement curve of the soil body；
Upper surface to the top of rigid circular pipe of the slurry injection soil body is formed into grouting system, is placed on the top of flexible round tube close
Packing block；
It will be between two pieces of plates of the rigid circular pipe dislocation；
Setting load is forced into the grouting system, records the force-displacement curve of grouting system in loading procedure；
Nut is screwed onto upper flat plate position, whole device is conserved；
Slurry and the soil body after taking out hardening, obtain composition, structure and the mechanical property of grouting system with the differentiation of curing age.
Further, set load as 0.2 ~ 0.5MPa, the volume ratio of the soil body and slurry can sets itself, such as 3:1,2:1,
1:1,1:2,1:3 etc..
Compared with existing test method, present invention has an advantage that
(1) present invention presses to whole system by studying the soil body and slurry as a system, to pressing
Various parameters in journey are measured, record, and test result is more bonded engineering reality；
(2) since system performance is different from homogenous material performance, it is not the superposition of the two performance, is studied as a system,
So that result is more fully；
(3) slurry performance development is different from the performance development under load action under normal pressure, there are grouting pressure in mortar depositing construction,
New construction body forms in the process no matter the soil body or slurry are all by the effect of stratum Water And Earth Pressures；The present invention considers load work
With, under curing age, further test load effect, grouting system composition, structure and mechanical property drilling with curing age
Become, to instruct the evaluation of mortar depositing construction quality.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Appended drawing reference: 1- flexibility round tube；2- seal block；3- rigid circular pipe；The 4- soil body；5- slurry；6- plate；7- spiral shell
Bolt；8- loads cushion block.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but in the present invention
Appearance is not limited only to embodiment.
As shown in Figure 1, a kind of grouting system compression performance test device,
Including flexible round tube 1, seal block 2, rigid circular pipe 3, plate 6 and load cushion block 8, bolt 7 and nut；
The bottom end of flexible round tube 1 is provided with seal block 2, and the two is sealed, it is ensured that waterproof；Then by the connected body of the two
It is placed in rigid circular pipe 3；
For placing grouting system on lower end seal block 2；Grouting system includes the soil body 4 and slurry 5.
The upper end of grouting system is provided with another seal block 2；The top of upper end seal block 2 and rigid circular pipe 3
Bottom is provided with plate 6；The top of upper end plate is arranged in load cushion block 8, and load cushion block 8 is for connecting pressurizing device, bolt 7
It is fixed on lower end plate 6；Bolt 7 passes through upper end plate 6；Nut is provided on the upper bolt 7 of upper end plate 6.Two hold level with both hands
Fastener is provided between plate 6.
The size of two pieces of plates 6 can increase, and put down three such rigid circular pipes 3；3 slip casting systems can once be formed
System.
Flexible round tube 1 selects the rubber tube of thickness 3mm, outer diameter 106mm, height 320mm；
Seal block 2 uses the PA66 nylon rod of diameter 99mm, height 50mm；
Rigid circular pipe 3 passes through cuff by polymethyl methacrylate (PMMA) half slot of two internal diameter 106mm, height 300mm
Composition；
Plate 6 selects nylon sheet to be made, diameter 200mm, thickness 10mm；
Cushion block 8 is loaded using the PA66 nylon rod of diameter 105mm, height 300mm.
47 holes of bolt are evenly arranged on diameter 160mm circumference, bolt length 350mm, long threaded portion 100mm；
A kind of grouting system compression performance test method, described method includes following steps:
(1) seal block is loaded into the lower part of flexible round tube, is bound and sealed with rubber band, is fitted into rigid circular pipe；
(2) soil body for weighing certain mass is uniformly fitted into flexible round tube, and load cushion block is placed in soil body upper surface, record soil
Body elemental height；It pressurizes on dislocation universal testing machine, until setting pressure 0.3MPa, records load-displacement curve, load peak value pair
The shift value answered is soil body decrement, unloading, takes out load cushion block；
(3) slurry stirred evenly is injected in flexible round tube, until rigid circular pipe top, gasket is placed on flexible round tube top
Block, and the two is sealed, it is ensured that waterproof, seal block lower end surface is contacted with slurry upper surface；Dislocation has screw bolt and nut
Two pieces of plates between, 0.3MPa is forced into using testing machine identical with step (2), at the beginning of moving beam and upper flat plate surface
Position when beginning to contact is nought state, records system force-displacement curve in loading procedure；
(4) load terminates, and testing machine moving beam is static, and nut is screwed onto upper flat plate position immediately, unloads, and then will
It is conserved in the epidemic disaster environment of its dislocation setting；
(5) grouting system was conserved to setting age, is unscrewed nut, rigid circular pipe is taken out between two pieces of plates, then will be flexible
Round tube takes out from rigid circular pipe, dismantles the seal block at both ends, takes out slurry and the soil body after hardening, studies in 0.3MPa pressure
Under effect, grouting system composition, structure and mechanical property with curing age differentiation.
Part of test results is as follows:
The soil body is by after 0.3MPa pressure action, and unloading is packed into slurry, and 0.3MPa pressure action is in the soil body and slurry.5 groups of slip casting systems
System compression index see the table below:
| Number | Height (mm) before soil body compression | Height (mm) after soil body compression | Slurry height (mm) | Decrement (mm) | Compression index (percent by volume, %) |
| 1 | 115.0 | 101.1 | 92.0 | 17.9 | 9.3 |
| 2 | 70.0 | 53.5 | 101.5 | 14.2 | 9.2 |
| 3 | 110.0 | 84.0 | 76.0 | 13.0 | 8.1 |
| 4 | 100.0 | 75.0 | 90.0 | 17.0 | 10.3 |
| 5 | 103.0 | 73.0 | 77.0 | 17.0 | 11.3 |
Remarks: 1, compression index=decrement/(height+slurry height after soil body compression)；2, the soil body, slurry diameter phi 100
mm。
Use this method that can act on test load under lower grouting system load-deformation rule and load action, slip casting system
The differentiation of system composition, structure and mechanical property.
It should be understood that above-described embodiment is merely to illustrate the specific embodiment of technical solution of the present invention, rather than limitation is originally
The range of invention.After the present invention has been read, those skilled in the art to the modifications of various equivalent forms of the invention and replace
It changes and falls within protection scope defined by the claim of this application.
Claims (9)
1. a kind of grouting system compression performance test device, which is characterized in that
Including flexible round tube, seal block, rigid circular pipe, plate and load cushion block；
The flexibility round tube is socketed in rigid circular pipe；
The both ends of the flexibility round tube are provided with seal block；
For placing grouting system between the seal block；
The top of the upper end seal block and the bottom of rigid circular pipe are provided with plate；
Fastener is provided between the both ends plate；
Load cushion block is provided at the top of the upper end plate, the load cushion block is for connecting pressurizing device.
2. a kind of grouting system compression performance test device according to claim 1, which is characterized in that
The fastener includes screw bolt and nut；
The bolt is fixed on the plate of lower end；
The bolt passes through upper end plate；
Nut is provided on the upper bolt of the upper end plate.
3. a kind of grouting system compression performance test device according to claim 2, which is characterized in that the bolt is uniform
It is distributed on plate.
4. a kind of grouting system compression performance test device according to claim 1, which is characterized in that
The internal diameter of the rigid circular pipe is 102 ~ 110mm, is highly 250 ~ 300mm；
The material of the rigid circular pipe includes polymethyl methacrylate.
5. a kind of grouting system compression performance test device according to claim 1, which is characterized in that
The flexibility round tube is made of plastics or rubber material；
The outer diameter of the flexibility round tube is identical as the internal diameter of rigid circular pipe；
It is described flexibility round tube with a thickness of 1 ~ 5mm；
The height of the flexibility round tube is greater than 10 ~ 50mm of rigid circular pipe.
6. a kind of grouting system compression performance test device according to claim 1, which is characterized in that
The seal block and load cushion block are circle；
The diameter of the seal block is less than 1 ~ 2mm of internal diameter of flexible round tube, is highly 30 ~ 50mm；
The diameter of the load cushion block is less than 1 ~ 2mm of internal diameter of rigid circular pipe, is highly 300 ~ 400mm；
The material of the seal block and load cushion block includes polyamide.
7. a kind of grouting system compression performance test device according to claim 1, which is characterized in that
The plate is circle；Material includes nylon sheet.
8. a kind of grouting system compression performance test method, which is characterized in that
The lower part of flexible round tube is put on seal block to be placed in rigid circular pipe；
The soil body is packed into flexible round tube, load cushion block is put into, records soil body elemental height；
Setting load is forced into the soil body, obtains the force-displacement curve of the soil body；
Upper surface to the top of rigid circular pipe of the slurry injection soil body is formed into grouting system, is placed on the top of flexible round tube close
Packing block；
By between two pieces of plates of the rigid circular pipe dislocation, in upper end, load cushion block is placed at the top of plate；
Setting load is forced into the grouting system, records the force-displacement curve of grouting system in loading procedure；
Nut is screwed onto upper end plate position, whole device is conserved；
Slurry and the soil body after taking out hardening, obtain composition, structure and the mechanical property of grouting system with the differentiation of curing age.
9. a kind of grouting system compression performance test method according to claim 8, which is characterized in that it is described set load as
0.2~0.5MPa。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402910.5A CN110132624B (en) | 2019-05-15 | 2019-05-15 | Grouting system compression performance testing device and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402910.5A CN110132624B (en) | 2019-05-15 | 2019-05-15 | Grouting system compression performance testing device and method thereof |
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| CN110132624A true CN110132624A (en) | 2019-08-16 |
| CN110132624B CN110132624B (en) | 2021-04-09 |
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Citations (6)
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|---|---|---|---|---|
| JP2009025117A (en) * | 2007-07-19 | 2009-02-05 | Shimizu Corp | Clogging testing machine for high-pressure grout |
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| CN106018753A (en) * | 2016-07-20 | 2016-10-12 | 中国矿业大学 | System and method for compression test of filling flyash slurry in overburden rock isolated injection |
| CN107632116A (en) * | 2017-09-01 | 2018-01-26 | 山东大学 | A kind of three-dimensional grouting model test servo-control system and test method |
| CN107632652A (en) * | 2017-09-01 | 2018-01-26 | 山东大学 | A kind of slip casting Servocontrol device and operating method for indoor grouting simulation test |
| CN108362859A (en) * | 2018-02-02 | 2018-08-03 | 山东科技大学 | A kind of experimental system for simulating old goaf grouting effect |
-
2019
- 2019-05-15 CN CN201910402910.5A patent/CN110132624B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009025117A (en) * | 2007-07-19 | 2009-02-05 | Shimizu Corp | Clogging testing machine for high-pressure grout |
| CN101799386A (en) * | 2009-12-25 | 2010-08-11 | 福州大学 | Testing device and testing method for engineering mechanical properties of falling rock backfill |
| CN106018753A (en) * | 2016-07-20 | 2016-10-12 | 中国矿业大学 | System and method for compression test of filling flyash slurry in overburden rock isolated injection |
| CN107632116A (en) * | 2017-09-01 | 2018-01-26 | 山东大学 | A kind of three-dimensional grouting model test servo-control system and test method |
| CN107632652A (en) * | 2017-09-01 | 2018-01-26 | 山东大学 | A kind of slip casting Servocontrol device and operating method for indoor grouting simulation test |
| CN108362859A (en) * | 2018-02-02 | 2018-08-03 | 山东科技大学 | A kind of experimental system for simulating old goaf grouting effect |
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| Title |
|---|
| 李志鹏等: "砂层渗透注浆加固效果模型试验研究", 《煤炭学报》 * |
| 薛晓辉等: "公路隧道衬砌注浆加固力学特性研究", 《公路交通科技》 * |
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