CN104655803A - Tunnel grouting model testing device - Google Patents
Tunnel grouting model testing device Download PDFInfo
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- CN104655803A CN104655803A CN201510052224.1A CN201510052224A CN104655803A CN 104655803 A CN104655803 A CN 104655803A CN 201510052224 A CN201510052224 A CN 201510052224A CN 104655803 A CN104655803 A CN 104655803A
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Abstract
The invention provides a tunnel grouting model testing device which comprises a grouting part, a rack main body and a loading part, wherein the grouting part is connected with the rack main body by virtue of a grouting pipeline; the loading part is arranged on the top of the rack main body; the device also comprises a monitoring part; and the monitoring part is respectively connected with the grouting part and the rack main body. According to the testing device disclosed by the invention, the indoor experiment simulation of the grouting process can be performed, the porous grouting problem of waterless stratum or water-containing stratum is simulated under the condition that ground stress and water pressure are loaded, and the experimental process can be monitored in real time.
Description
Technical field
The present invention relates to tunnel grouting analogue technique, be specifically related to a kind of tunnel grouting model test apparatus.
Background technology
In the work progress of tunnels and underground engineering, when running into the unfavorable geology constructional difficulties such as soft rock, fault belt, karst, slurry injection technique can play and improve stratum, ensure construction safety, reduction liner structure is stressed, improve the permanance of liner structure and the effect of controlled drainage.And as the soul of underground works, slurry injection technique also has obvious advantage in soil surface treatment, tunnel and underground works water reinforcement.
The disguise of slip casting process and the complicacy of research object Rock And Soil determine the subject of slip casting for a long time mainly based on experience.How making slurry injection technique break through further and break away from half theoretical semiempirical state, can simulate slurry injection technique truly by the slip casting model of setting, is the breach that promotion Tunnel Engineering further develops.There is following defect in the slip casting model test equipment realized at present: the size of experimental facilities makes to starch in slip casting process arteries and veins diffusion, and to be subject to edge effect larger; The situation that water-bearing strata loads hydraulic pressure can only be simulated; Can only single hole grouting test be carried out, many slurry arteries and veins connection that multiple holes grouting produces cannot be studied.
Summary of the invention
In view of this, the invention provides a kind of tunnel grouting model test apparatus, be intended to simulate the stratum condition in tunnel grouting process more truly.
The technical solution used in the present invention is specially:
A kind of tunnel grouting model test apparatus, comprise slip casting portion, stand main body and loading unit, described slip casting portion is connected with described stand main body by grouting pipeline, and described loading unit is located at the top of described stand main body; Also comprise monitoring portion, described monitoring portion is connected respectively with described slip casting portion, described stand main body.
In above-mentioned tunnel grouting model test apparatus, described slip casting portion is two fluid grouting portion, described two fluid grouting portion comprises storage slurry unit and grouting pump, described storage slurry unit comprises the first pulp storing barrel and the second pulp storing barrel, described first pulp storing barrel is connected with described grouting pump respectively with the second pulp storing barrel, and described grouting pump is connected to described stand main body further.
In above-mentioned tunnel grouting model test apparatus, described stand main body comprises positive plate, side plate, cover plate and base plate, and described positive plate comprises the first positive plate and the second positive plate, and described side plate comprises the first side plate and the second side plate; Described first positive plate is provided with blasthole and at least one grouting hole, and described first side plate is provided with vertical turning axle, and described first side plate rotates along described turning axle, and described side plate and described cover plate are equipped with band.
In above-mentioned tunnel grouting model test apparatus, described base plate comprises ribbing bar-mat reinforcement and the first filter, and described ribbing bar-mat reinforcement and described first filter set gradually from bottom to top, are provided with drainpipe below described base plate.
In above-mentioned tunnel grouting model test apparatus, described loading unit comprises Water hydraulic static pressure loading unit and servo loading unit, and described Water hydraulic static pressure loading unit is connected with described stand main body by hydraulic pipeline, and described servo loading unit is connected with described stand main body.
In above-mentioned tunnel grouting model test apparatus, described Water hydraulic static pressure loading unit comprises air compressor machine and sealing water pail, described air compressor machine is connected with described sealing water pail by pneumatics pipeline, described pneumatics pipeline is provided with pressure maintaining valve, and described sealing water pail is connected to described stand main body further by hydraulic pipeline.
In above-mentioned tunnel grouting model test apparatus, described servo loading unit comprises servocontrol platform and hydraulic cylinder, described servocontrol platform is connected respectively with hydraulic cylinder described in several, and described in several, hydraulic cylinder is connected in parallel, and described hydraulic cylinder is placed in described stand main body.
In above-mentioned tunnel grouting model test apparatus, also comprise pulley track, described pulley track is located at the top of described stand main body, and described hydraulic cylinder is placed in described pulley track, and slides along described pulley track.
In above-mentioned tunnel grouting model test apparatus, described stand main body is also provided with the second filter, described sealing water pail is connected to the stand main body between described cover plate and described second filter further by hydraulic pipeline.
In above-mentioned tunnel grouting model test apparatus, described monitoring portion comprises digital to analog converter, computing machine and data acquisition unit, described computing machine is connected with described data acquisition unit by described digital to analog converter, described data acquisition unit comprises pressure unit, flowmeter, soil pressure cell and hole pressure meter, wherein: described pressure unit and described flowmeter are located on the grouting pipeline between described slip casting portion and stand main body, and described digital to analog converter is connected respectively with described pressure unit, described flowmeter; In the soil body that described soil pressure cell and the pressure score of described hole are not embedded in described stand main body, described digital to analog converter is pressed to score with described soil pressure cell, described hole by sensor and is not connected.
The beneficial effect that the present invention produces is:
Tunnel grouting model test apparatus of the present invention realizes the grouting simulation test of year old water-bearing strata and not water-bearing strata respectively by loading water pressure and reservoir pressure, can go out real formation condition at indoor accurate simulation; And can by Water hydraulic static pressure loading unit testing injecting paste material before the test after infiltration coefficient change;
Adopt high-strength bolt and sealing to bring the sealing of warranty test equipment, thus improve the stability of test; Grouting pressure and grouting amount in process of the test is grasped, in real time the situation of change of monitoring soil pressure and water pressure by sensor; After experiment terminates, by the cleaning soil body, the version of record slurry arteries and veins, obtains slurries Diffusion Law in the earth formation exactly.
In addition, (punching block) stand main body in this experimental provision can repeatedly use, and simplifies filling and loading procedure by arranging pulley track and turning axle, reduces experimentation cost, improves test efficiency.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, more completely the present invention can be understood better.Accompanying drawing described herein is used to provide a further understanding of the present invention, and embodiment and explanation thereof, for explaining the present invention, do not form inappropriate limitation of the present invention.
Fig. 1 is the structural representation of a kind of tunnel grouting model test apparatus of the present invention;
Fig. 2 is that schematic diagram is looked on a left side for the stand main body of a kind of tunnel grouting model test apparatus of the present invention.
In figure: 1, first pulp storing barrel 2, second pulp storing barrel 3, grouting pump 4, grouting pipeline 5, valve 6, pressure unit 7, flowmeter 8, blasthole 9, grouting hole 10, first front steel plate 11, first side plate 12, cover plate 13, sliding rail 14, ribbing bar-mat reinforcement 15, first filter 16, drainpipe 17, air compressor machine 18, sealing water pail 19, pneumatics pipeline 20, hydraulic pipeline 21, pressure maintaining valve 22, soil pressure cell 23, hole pressure meter 24, sensor 25, hydraulic cylinder 26, servocontrol platform 27, second filter 28, digital to analog converter 29, computing machine.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
A kind of tunnel grouting model test apparatus, comprise two fluid grouting portion, stand main body and loading unit, slip casting portion is connected with stand main body by grouting pipeline 4, and loading unit is located at the top of stand main body; Also comprise monitoring portion, monitoring portion is connected respectively with slip casting portion, stand main body.
Two fluid grouting portion comprises storage slurry unit and grouting pump 3, and storage slurry unit comprises the first pulp storing barrel 1 and the second pulp storing barrel 2, first pulp storing barrel 1 is connected with Double-liquid mud-injection pump 3 respectively with the second pulp storing barrel 2, and grouting pump 3 is connected to stand main body further.
Punching block stand main body comprises the first front steel plate 10 of (direction in Fig. 1) left and right directions and the second front steel plate, the first side plate 11 of fore-and-aft direction and the second side plate and cover plate 12 and base plate; Wherein: the first front steel plate 10 is provided with blasthole 8 and grouting hole 9 (as shown in Figure 2, can be provided with multiple grouting hole 9, slip casting portion can pass through to adopt T-valve or other modes, respectively to slip casting in multiple slip casting 9 hole); First side plate 11 is provided with vertical turning axle, and the first side plate 11 is along turning axle rotating opening; Side plate and cover plate 12 are equipped with band.
Base plate comprises ribbing bar-mat reinforcement 14 and the first filter 15, ribbing bar-mat reinforcement 14 and the first filter 15 set gradually from bottom to top, be provided with drainpipe 16 below base plate, ribbing bar-mat reinforcement 14 and the first filter 15 intercept injecting paste material, thus water is flowed out from the drainpipe 16 of bottom.
Loading unit comprises Water hydraulic static pressure loading unit and servo loading unit, and Water hydraulic static pressure loading unit is connected with stand main body by hydraulic pipeline 20, and servo loading unit is connected with stand main body.
Water hydraulic static pressure loading unit comprises air compressor machine 17 and sealing water pail 18, and air compressor machine 17 is connected with sealing water pail 18 by pneumatics pipeline 19, and pneumatics pipeline 19 is provided with pressure maintaining valve 21, and sealing water pail 18 is connected to stand main body further by hydraulic pipeline 20.
Servo loading unit comprises servocontrol platform 26 and hydraulic cylinder 25, and servocontrol platform 26 is connected respectively with several hydraulic cylinders 25, and several hydraulic cylinders 25 are connected in parallel, and hydraulic cylinder 25 is placed in stand main body.
The top of stand main body is provided with pulley track 13, and hydraulic cylinder 25 is placed in described pulley track, and slides along pulley track 13.
The side plate of stand main body is provided with the second filter 27, the effect of stand main body second filter 27 that sealing water pail 18 is connected between cover plate 12 and the second filter 27 further by hydraulic pipeline 20 be by material and moisture every.
Monitoring portion comprises digital to analog converter 28, computing machine 29 and data acquisition unit, computing machine 29 is connected with data acquisition unit by digital to analog converter 28, data acquisition unit comprises pressure unit 6, flowmeter 7, soil pressure cell 22 and hole pressure meter 23, wherein: pressure unit 6 and flowmeter 7 are located on the grouting pipeline 4 between grouting pump 3 and stand main body, and digital to analog converter 28 is connected respectively with pressure unit 6, flowmeter 7; Soil pressure cell 22 and hole pressure meter 23 are embedded in the soil body in stand main body respectively, and digital to analog converter 28 presses meter 23 to be connected respectively by sensor 24 with soil pressure cell 22, hole.
A kind of a kind of embodiment of tunnel grouting model test apparatus as shown in Figure 1, mainly comprises four systems:
A, filling system
The filling system be made up of Double-liquid mud-injection pump 3, pulp storing barrel (1,2) and Grouting Pipe 4 etc. is mainly used to simulation slip casting process, wherein, dual-liquid slip-casting material is placed in different pulp storing barrels respectively, stand main body is injected into by grouting pump 3, and the pressure unit 6 installed on grouting pipe 4 and flowmeter 7 pairs of grouting pressures and grouting amount are monitored, can use the parameter of different grouting pumps 3 as required, be 3MPa as selected the maximum grouting pressure of grouting pump 3.
B, platform system
In the present embodiment, stand main body adopts square punching block, length is the punching block platform system of 1m, wherein: front steel plate 10 has blasthole 8 and grouting hole 9, can the first side plate 11 of switch while be provided with turning axle, first side plate 11 realizes rotary switch by turning axle, facilitates filling test material.For the impermeability in warranty test process, side plate and cover plate 12 are provided with band, adopt high-strength bolt compacting during test.Punching block stand body top is provided with pulley track 13, and hydraulic cylinder 25 can be free to slide along pulley track 13 easily.In addition, base plate upwards 2-5cm (as 2cm) place arranges ribbing bar-mat reinforcement 14 and the first filter 15, and the water in process of the test, by the first filter 15, flows out from the drainpipe 16 of bottom.
C: loading system
Comprise Water hydraulic static pressure loading unit and servo loading unit, Water hydraulic static pressure loading unit wherein forms primarily of air compressor machine 17, sealing water pail 18, pneumatics pipeline 19 and hydraulic pipeline 20, and the pressure maintaining valve that pneumatics pipeline 19 is installed is stablizing in order to hydraulic pressure in warranty test process; During Water hydraulic static pressure loading, seal cover board 12 is installed, applies hydraulic pressure by the blasthole 8 at punching block top, simulate the seepage flow of different water ballast(ing) distribution situation and water.Servo loading unit is mainly made up of hydraulic cylinder 25 and servocontrol platform 26, need extract seal cover board 12 during loading, by hydraulic cylinder 25 plus-pressure, acts directly on the soil body and loads, and can simulate the reservoir stress situation under anhydrous condition.
Cover plate 12 is dismountable, and hydraulic cylinder 25 is slidably, is installed on the top of stand main body by the projection that side plate top is prefabricated; Wherein: cover plate 12 adopts the mode of artificial handling, because the weight of hydraulic cylinder 25 is larger, therefore adopt the mode of handling of sliding, the prefabricated projection in side plate top has bolt hole, in order to when Water hydraulic static pressure loading unit and servo loading with cover plate 12 and hydraulic cylinder 25 fixing.
The width of sliding rail 13 is greater than the width of punching block stand main body, when not using servo loading, by pulley track 13, servo loading unit is slided into side (right side in Fig. 1), to install cover plate 12, during handling material, also side (right side in Fig. 1) can be slid into, so that the handling of material.
D: monitoring system
Monitoring system is mainly used for the overall process monitoring to grouting pressure and grouting amount, and to the overall process monitoring that the surrouding rock stress caused by slip casting and hole pressure change.Be installed on the pressure unit 6 on grouting pipeline 4 and flowmeter 7, and the soil pressure cell 22 be embedded in the soil body and hole pressure meter 23, by realizing being connected with computing machine 29, achieve real-time electron collection data and analysis.
The specific embodiments of test unit is specially:
First according to the actual requirement of simulation test, choose suitable cast material to be filled in the middle of punching block stand main body, and bury corresponding pneumatics meter 23 and soil pressure cell 23 underground, shutting can the first side plate 11 of switch, fix with high-strength bolt, in order to ensure the sealing of stand main body;
Next carries out simulation test, and simulation test comprises water-bearing strata and not water-bearing strata simulation test, wherein:
If need water-bearing strata be simulated, then need seal cover board 12 is installed, apply hydraulic pressure by blasthole 8 to stand, and open drainpipe 16, after the water pressure in punching block stand main body is stable, closes drainpipe 16, and carry out test figure record;
If need simulate not water-bearing strata, dismounting seal cover board, applies pressure by hydraulic loading system directly on the soil body, and makes its abundant consolidation at this pressure, and carries out test figure record;
Selecting after to simulation that is moisture or not water-bearing strata, different injecting paste materials is loaded in pulp storing barrel (1,2), in punching block stand main body, slurries are injected by Double-liquid mud-injection pump 3, in slip casting process, by pressure unit 6 and flowmeter 7 real time record grouting pressure and grouting amount; After off-test, close the valve 5 on grout pipe line 4, and separate filling system, for the consideration in the serviceable life to equipment, should immediately with the relevant device of clean water filling system.
Before and after simulation test, the seepage tests of water can being carried out by Water hydraulic static pressure loading unit, when forming steady seepage, obtaining the infiltration coefficient of test material before and after slip casting by the water discharge of bottom drainpipe 16 in record certain hour.
Test unit of the present invention is studied grouting mechanism by the field condition of simulation tunnel mortar depositing construction, suitable grouting process, grouting parameter and injecting paste material is selected according to the object of tunnel grouting, go out tunnel grouting test at lab simulation, and can test to slip casting effect.Especially for the concrete condition that current domestic tunnels and underground engineering is built on a large scale, analysis and research are carried out to the reinforcing mechanism of water blocking of slip casting significant.
As mentioned above, embodiments of the invention are explained, obviously, as long as do not depart from fact inventive point of the present invention and effect, will be readily apparent to persons skilled in the art distortion, is also all included within protection scope of the present invention.
Claims (10)
1. a tunnel grouting model test apparatus, is characterized in that, comprises slip casting portion, stand main body and loading unit, and described slip casting portion is connected with described stand main body by grouting pipeline, and described loading unit is located at the top of described stand main body; Also comprise monitoring portion, described monitoring portion is connected respectively with described slip casting portion, described stand main body.
2. tunnel grouting model test apparatus according to claim 1, it is characterized in that, described slip casting portion comprises storage slurry unit and grouting pump, described storage slurry unit comprises the first pulp storing barrel and the second pulp storing barrel, described first pulp storing barrel is connected with described grouting pump respectively with the second pulp storing barrel, and described grouting pump is connected to described stand main body further.
3. tunnel grouting model test apparatus according to claim 1, is characterized in that, described stand main body comprises positive plate, side plate, cover plate and base plate, and described positive plate comprises the first positive plate and the second positive plate, and described side plate comprises the first side plate and the second side plate; Described first positive plate is provided with blasthole and at least one grouting hole, and described first side plate is provided with vertical turning axle, and described first side plate rotates along described turning axle, and described side plate and described cover plate are equipped with band.
4. tunnel grouting model test apparatus according to claim 3, it is characterized in that, described base plate comprises ribbing bar-mat reinforcement and the first filter, and described ribbing bar-mat reinforcement and described first filter set gradually from bottom to top, are provided with drainpipe below described base plate.
5. tunnel grouting model test apparatus according to claim 1, it is characterized in that, described loading unit comprises Water hydraulic static pressure loading unit and servo loading unit, described Water hydraulic static pressure loading unit is connected with described stand main body by hydraulic pipeline, and described servo loading unit is connected with described stand main body.
6. tunnel grouting model test apparatus according to claim 5, it is characterized in that, described Water hydraulic static pressure loading unit comprises air compressor machine and sealing water pail, described air compressor machine is connected with described sealing water pail by pneumatics pipeline, described pneumatics pipeline is provided with pressure maintaining valve, and described sealing water pail is connected to described stand main body further by hydraulic pipeline.
7. tunnel grouting model test apparatus according to claim 5, it is characterized in that, described servo loading unit comprises servocontrol platform and hydraulic cylinder, described servocontrol platform is connected respectively with hydraulic cylinder described in several, described in several, hydraulic cylinder is connected in parallel, and described hydraulic cylinder is placed in described stand main body.
8. tunnel grouting model test apparatus according to claim 7, is characterized in that, also comprise pulley track, and described pulley track is located at the top of described stand main body, and described hydraulic cylinder is placed in described pulley track, and slides along described pulley track.
9. tunnel grouting model test apparatus according to claim 7, it is characterized in that, described stand main body is also provided with the second filter, and described sealing water pail is connected to the stand main body between described cover plate and described second filter further by hydraulic pipeline.
10. tunnel grouting model test apparatus according to claim 1, it is characterized in that, described monitoring portion comprises digital to analog converter, computing machine and data acquisition unit, described computing machine is connected with described data acquisition unit by described digital to analog converter, described data acquisition unit comprises pressure unit, flowmeter, soil pressure cell and hole pressure meter, wherein:
Described pressure unit and described flowmeter are located on the grouting pipeline between described slip casting portion and described stand main body, and described digital to analog converter is connected respectively with described pressure unit, described flowmeter;
In the soil body that described soil pressure cell and the pressure score of described hole are not embedded in described stand main body, described digital to analog converter is pressed to score with described soil pressure cell, described hole by sensor and is not connected.
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| CN105424892A (en) * | 2015-12-23 | 2016-03-23 | 山东大学 | Intelligent grouting test system based on triangle rotor grouting pump and test method thereof |
| CN105527197A (en) * | 2015-12-30 | 2016-04-27 | 武汉市市政建设集团有限公司 | A testing apparatus and a method for measuring a diffusion radius for binary-slurry grouting |
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| CN105866349A (en) * | 2016-05-25 | 2016-08-17 | 长安大学 | Three-dimensional visual grouting effect test chamber |
| CN106338419A (en) * | 2016-08-10 | 2017-01-18 | 山东大学 | Porous multi-angle adjustable-depth type split-grouting specimen preparation device and method |
| CN106645582A (en) * | 2016-12-29 | 2017-05-10 | 中国人民解放军63926部队 | Test apparatus for simulating stratum uplift in grouting process and test method of test apparatus |
| CN107179391A (en) * | 2017-06-02 | 2017-09-19 | 同济大学 | A kind of experimental rig that Under-cross tunnel shallow layer grouting is buried for an ultra shallow |
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| CN110514808A (en) * | 2019-08-22 | 2019-11-29 | 中国科学院武汉岩土力学研究所 | A kind of rock cranny grouting test system |
| CN110529148A (en) * | 2019-07-24 | 2019-12-03 | 中南大学 | It is a kind of for simulating the experimental provision and experimental method of slip casting of banketing |
| CN110850060A (en) * | 2019-11-22 | 2020-02-28 | 北京交通大学 | Visual porous grouting test device and test method thereof |
| CN111122046A (en) * | 2020-01-07 | 2020-05-08 | 河海大学 | Device and method for testing buoyancy on segment ring in consideration of shield tail wall post-grouting influence |
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| CN105136641A (en) * | 2015-08-07 | 2015-12-09 | 山东大学 | Model device for simulating permeation grouting diffusion test under flowing water condition |
| CN105424892A (en) * | 2015-12-23 | 2016-03-23 | 山东大学 | Intelligent grouting test system based on triangle rotor grouting pump and test method thereof |
| CN105527197A (en) * | 2015-12-30 | 2016-04-27 | 武汉市市政建设集团有限公司 | A testing apparatus and a method for measuring a diffusion radius for binary-slurry grouting |
| CN105717024A (en) * | 2016-02-19 | 2016-06-29 | 龙岩学院 | Device for testing performance of grouting and water plugging material for mine and application method of device |
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Application publication date: 20150527 |