CN1908371A - Slip casting diffusion test set - Google Patents
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- CN1908371A CN1908371A CNA2006100216389A CN200610021638A CN1908371A CN 1908371 A CN1908371 A CN 1908371A CN A2006100216389 A CNA2006100216389 A CN A2006100216389A CN 200610021638 A CN200610021638 A CN 200610021638A CN 1908371 A CN1908371 A CN 1908371A
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Abstract
The invention relates to a slurry disperse tester, which comprises: a testing fluid generator, a slurry disperse tester, and a recycle device, wherein the testing fluid generator generates the slurry, to feed testing material to the slurry disperse tester via the slurry pressure and slurry amount; the slurry can disperse in any simulated seams in the slurry disperse tester; the slurry disperse tester has the window for watching the slurry dispersed shape and the disperse edge, and the fluid pressure tester for reading out the energy consumption in different disperse distance; the recycle device can recycle the slurry. The invention can simulate different seams and geological conditions, to confirm different pressure and amount.
Description
Technical field
The present invention relates to a kind of slip casting diffusion test set.
Background technology
Because the complexity of rock mass geology condition and the disguise of Grouting engineering, people are difficult to the control slip casting effect, as slurries range of scatter, grouting water-tight or consolidation effect, and apparent effect and the anti-situation of injecting the slurry of local testing result that can only be after slip casting.Thereby people wish to set up a kind of slip casting diffusion model always, utilize limited known conditions to go to predict range of grouting.
But, set up all engineerings of putting and all accurate slip casting diffusion theory can't realize.Though a lot of documents and materials are devoted to set up the model that can predict crack slip casting range of scatter, and derive diffusion radius formula, but owing to when setting up model and derivation formula, need consider various geological conditionss as much as possible, as the crack aperture, permeability, the crack roughness, whether charges are arranged, the crack glacing flatness, orientation, crack and inclination angle, crack distribution situation and connectedness, creviced formation groundwater pressure and mobile, whether fissure-plane opens etc. and various construction factors such as slurry viscosity and shear force, granular size in the slurries, grouting pressure and flow, job practices etc., and these conditions are so complicated and changeable, are impossible so want to set up a slip casting diffusion equation that comprises all factors and suitable all scenario.Therefore, researchers study after some condition is simplified, as one dimension or two-dimensional diffusion model, slurries are simplified to Newtonian fluid or Bingham plastic fluid, crack the straight crack of aperture such as regard as, consider crack glacing flatness and degree of roughness, consider the underground water static pressure and ignore influence of dynamic water etc., thereby set up many slip casting models.
Can analyze according to available data and to draw: (1) in nearly all slip casting diffusion model, the selected of flow pattern all is a crucial prerequisite setting up the slip casting diffusion model.For the slurries of different flow patterns, its rheological parameter difference, diffusion will produce material impact and the type of each rheological parameter and value are to slurries.For example, Newtonian fluid has only Newtonian viscosity and does not have yield value; And both there had been plastic viscosity in Ben-Hur (Bingham) plastic fluid, had yield value again; The rheological parameter of power-law fluid then is liquidity index and consistency coefficient.These rheological parameters are different to the slurries diffusion influence.(2) size of viscosity, shear force also has significant impact to grout spreading range.The change of slurry viscosity, shear force numerical value can cause the variation significantly of grout spreading range.
But the comparison distinct issues that exist in the research are at present: (1) a lot of slip casting diffusion theories are to definite shortage system research of slurries flow pattern.From the data of present grasp, former study is confined to a certain subrange more, and system research of overall importance is less, is confined to the water/binder ratio scope of W/C＜1 as the research to cement paste more, and this obviously is not enough for hydraulic engineering slip casting.Study manyly to cement paste rheological, must lack, ignored the popularity of slurries Rheological Study the chemical grout rheology study.Some slip casting diffusion theory convection has only been done selected and the selection foundation is not provided.There is the conclusion of contradiction in some, needs further research to be clarified.Because laboratory test and engineering practice all prove, various slurries are not all Newtonian fluid or Ben-Hur (Bingham) plastic fluid; (2) not deep enough to the research of rheological parameter time variation.Some slip casting diffusion theory has been ignored slurry viscosity this situation in rising trend in the slip casting process, join viscosity at the beginning of adopting and remove derivation formula as the slurry viscosity value in the whole slip casting process when setting up the slip casting diffusion model, the result has obtained the theory diffusion radius more much bigger than actual result.Though also some theory has been discussed time variation that rheological parameter exists, or has provided classification, and is concrete inadequately, accurate and perfect, makes these grouting theory lose directive significance.Facts have proved that the viscosity of slurries can constantly change in the slip casting process, it is wrong going to replace with the viscosity of just joining slurries.(3) in the research about slurries flow pattern and rheological parameter time variation at present, exist many repugnances.The theory that has is used for all scenario with a certain specific result of the test, and this obviously is inappropriate.The researcher who has does not take into full account the test conditions and the concrete condition of citing document, and it is directly quoted in the research of oneself, and this has just directly caused wrong result.Therefore, need compare systematic research, so that clarification is distinguished in these judgements, and set up new slip casting diffusion model on this basis the time variation of the rheological parameters such as viscosity of different slurries.
For cement paste equigranular slurries, the slurries diffusion also relates to the concrete castability problem.I irritate crack width, the preceding sharp side of slurries whether by underground water dilute, the inclination angle, crack is the important indicator of slurries concrete castability to the performances such as influence of slurries diffusion length.These indexs are to setting up the slip casting diffusion model and the final diffusion length of definite slurries has material impact.
The slip casting practice also shows, a lot of slurries can even inject the crack three times by secondary except the very high rapid hardening slurries of cement water glass equal strength, promptly can repeat slip casting.This be because, but in the crack slurries at the pump after date, though lost flowability because of condensing, if but be subjected to the promotion of ambient pressure, as re-inject and newly join slurries and grouting pressure is enough big, but these concrements flow deformation still, i.e. the crack property annotated still.In other words, but in the slurries pump phase later a period of time, have the possibility that repeats slip casting.Grouting behind shaft or drift lining liquid might squeeze the slurries that before injected to be opened or pushes deep, crack, stratum to, or fills the space between first injection slurry concrement and the crack.Therefore, but be necessary to study slurries from the pump phase to the gain in strength rule between the initial setting time, to probe into the rule that different slurries can repeat to inject, instruct engineering construction better.
In sum, to time variation, bleed (stability), concrete castability, the plastic strength of slurries flow pattern, rheological parameter and can repeat rules such as slip casting, calculus body durability and study, develop following slurries range of scatter testing arrangement.
Summary of the invention
The object of the present invention is to provide a kind of simulation slip casting diffusion, the slip casting diffusion test set of various parameters is provided for slip casting.
For achieving the above object, slip casting diffusion test set of the present invention comprises test fluid generating apparatus, slurries diffusion test set and retracting device, the test fluid generating apparatus provides experiment material by the grouting pressure, the grouting amount that design to the slurries diffusion test set with the grouting serous fluid that produces; Grouting serous fluid can be simulated on the slurries diffusion test set in the slip casting model in various cracks and be spread, the slurries diffusion test set is provided with to see looks into slurries diffusion shape and the window of measuring diffusion term, is provided with the fluid pressure testing arrangement of reading different diffusion length slurries energy consumptions; Retracting device is used to finish the recovery of test job slurries.
In addition, for adapting to the slip casting of circumstance of flowing water, the test fluid generating apparatus of slip casting diffusion test set of the present invention also comprises the current generating apparatus, provides press water to the slurries diffusion test set; In the slurries diffusion test set water jet device is arranged, in moving water jet device, press water forms moving water flow field, moving water flow field and grouting serous fluid stack diffusion.The setting of moving water jet device can realize evenly flowing of current.
Slip casting diffusion test set of the present invention can simulate various cracks and crack geological conditions, determines different grouting serous fluid materials and grouting pressure and grouting amount, thereby makes slip casting reach predetermined effect.The present invention determines grouting serous fluid material and grouting pressure and grouting amount by the method for test, overcome the slip casting diffusion theory under geological environment complicated and changeable and various construction factor, can't calculate the defective of grouting parameter, thereby can be under the rock mass geology condition of complexity, overcome the disguise of Grouting engineering, control slip casting effect well.
Description of drawings
Fig. 1 is a kind of specific embodiment fundamental diagram of slip casting diffusion test set of the present invention;
Fig. 2 is a slurries pressurizer structure chart in the test fluid generating apparatus shown in Figure 1;
Fig. 3 is a slurries diffusion test set structure chart shown in Figure 1;
Fig. 4 is a slip casting pattern board structure chart shown in Figure 3;
Fig. 5 is a slip casting model upper plate structure chart shown in Figure 3;
The specific embodiment
Below in conjunction with the specific embodiment and accompanying drawing, slip casting diffusion test set of the present invention is described in further detail.
Fig. 1 is a kind of specific embodiment fundamental diagram of slip casting diffusion test set of the present invention.Among the figure, slip casting diffusion test set comprises test fluid generating apparatus 1, slurries diffusion test set 2 and retracting device 3, test fluid generating apparatus 1 comprises current pressurizer 11, slurries pressurizer 12, produce press water and grouting serous fluid, provide the experiment material by press water delivery hose 13, slurries delivery hose 14 to slurries diffusion test set 2 by the moving water flow velocity, grouting pressure, the grouting amount that design.Current pressurizer 11 and press water delivery hose 13 are formed the current generating apparatus.
Form moving water flow field 22 in the moving water jet device 21 of press water in slurries diffusion test set 2, grouting serous fluid forms slurries diffuse field 24 in slip casting nozzle 23, in slurries diffusion test set 2, moving water flow field 22 carries out two stacks 25 with slurries diffuse field 24 in the simulation crack.The slurries diffusion test set has the rule and the fluid pressure table of reading different diffusion length slurries energy consumptions that reads slurries diffusion size, regulates simulation fissured structure face width degree, inclination angle and charges wherein, simulates the crack geological conditions.Simultaneously, by to the simulation crack in, the observation of slurries range of scatter, fixed scope records pressure loss and grouting amount.Retracting device 3 is used to inject the recovery of the slurries of slurries diffusion test set, comprises that overfall, backwater collect flexible pipe and pulp-water retracting device.
Fig. 2 is a slurries pressurizer structure chart in the test fluid generating apparatus shown in Figure 1.Among the figure, pressurizer 12 comprises base plate 1201, on the middle pipe 1202 of airtight connection, pressurizer loam cake 1204 forms airtight space by flange on the pressurizer 1203 and pressurizer loam cake connecting bolt 1205.The pressurizer base 1206 that is provided with on the loam cake 1204 is connected with pressure source with forcing pipe joint 1208, and carrying for slurries provides power source.This power source can be the inflator (not shown).Also be provided with pressure gauge stand 1207 on the loam cake 1204, connect the pressure meter (not shown) on it, be used to observe the pressurizer internal pressure.Pipe 1202 has the delivery hose connector near base plate 1201 places in the pressurizer, is welded with 4 on this head and is in charge of, and links to each other with the slurries delivery hose, can be with grouting serous fluid to 2 conveyings of slurries diffusion test set.
In the present embodiment, current pressurizer 11 is identical with slurries pressurizer 12 structures.
Fig. 3 is a slurries diffusion test set structure chart shown in Figure 1.Among the figure, slurries diffusion test set 2 has a support 201, and its both upper ends thereof is respectively laid a bearing, and two bearings is connected by a round steel that can rotate betwixt 209, the two ends of round steel 209 are provided with anti-rotation pin 208, and anti-rotation pin 208 can be every round steel 209 location of 15 degree to rotating.Slip casting pattern board 205 is welded on the round steel 209, can realize 360 degree rotations, but can control it in the inclination angle of 0～90 ° of scope by anti-rotation pin 208, and the inclination angle that can control 0～90 ° of scope of slot structure face changes.Base plate 205 materials are seamless steel plate, are connected by plate connecting bolt 207 with slip casting model upper plate 206, and there is seal gasket the centre.Slip casting model upper plate 206 is the transparent plexiglass plate of band scale, can read slurries diffusion size by this poly (methyl methacrylate) plate.Constitute the simulation slot between slip casting pattern board 205 and the slip casting model upper plate 206, its structural plane width can be regulated in the 500mm scope at 0.5mm.In addition, its structural plane charges can be regulated according to geological conditions.Inlet tube 204, outlet 2010 are welded on the base plate 205 with pressure meter 202.Inlet tube 204 is divided into water inlet pipe 2041 and inlet pipe 2042, and wherein water inlet pipe 2041 is connected (not shown) together with the moving water jet device 21 of base plate inboard.Moving water jet device 21 is a seamless steel pipe with holes at the closed chamber top that base plate 205 and upper plate 206 surround, aperture 1mm, and length can realize the moving even laminar flow of water less than slurries diffusion test set 28cm.Inlet pipe 2042 be separately positioned on center of top, connect apart from top edge 40cm place slip casting nozzle 23 (not shown)s, slip casting nozzle 23 and base plate 205 weld together.Outlet 2010 is in the middle of the bottom, apart from lower limb 5cm.Water inlet pipe and inlet pipe are connected from test fluid generating apparatus 1 press water carrier pipe 13, slurries delivery hose 14 respectively with accordingly.Outlet 2010 is collected flexible pipe with the backwater of retracting device 3 and is connected.
Fig. 4 is a slip casting pattern board structure chart shown in Figure 3.Among the figure, slip casting pattern board 205 is fixed on and rotates on the round steel 209, and rotation round steel 209 exceeds slip casting pattern board 205 edges positioning disk 2011, and positioning disk 2011 matches with anti-rotation pin 208 and realizes the test angle.The base plate stiffener 2012 that base plate 205 is vertical with rotating round steel 209.Water ga(u)ge, slurry flow meter are installed in current pressurizer 11 and slurries pressurizer 12 on the pipeline of slurries diffusion test set 2 transmission.
Fig. 5 is a slip casting model upper plate structure chart shown in Figure 3.Among the figure, upper plate 206 has parallel upper plate stiffener 2013 for the transparent plexiglass plate of band scale on it, and its material is a steel plate, and to strengthen the intensity of upper plate 206, the edge is last edges of boards stiffener 2014, prevents that the organic glass distortion is expanded under the condition of high voltage.On edge, upper plate surrounding the bolt 2015 that is connected to a fixed with base plate 205 is arranged.
The slip casting diffusion test set of present embodiment is work like this, current pressurizer 11, slurries pressurizer 12, produce press water and grouting serous fluid, flow to slurries diffusion test set 2 by press water delivery hose 13, slurries delivery hose 14 by the moving water flow velocity, grouting pressure, the grouting amount that design.By moving water jet device 21, injection pressure water evenly generates moving water in the slot structure face; Grouting serous fluid spreads from slip casting nozzle 23 injection slot structure faces and at circumstance of flowing water.Plate seam width, promptly the structural plane width can be regulated by the bolt that is connected and fixed 2015 that connects slip casting model upper plate 206 and lower plate 205, and can utilize the gap filling thing to change the structural plane cut state.206 pairs of slurries diffusion forms of slip casting model upper plate and fixed border by the transparent organic glass material are observed, and can read the pressure of different range of scatters on the pressure meter of lower plate 205, thereby obtain slurries range of scatter, border and energy loss.Simultaneously, in the present embodiment, owing to slip casting model lower plate 205 is welded on the rotation round steel 209 that places rotationally on the support 201, and cooperate with anti-rotation pin 208, the inclination angle that can control 0～90 ° of scope of structural plane changes.Therefore, by slip casting diffusion test set of the present invention, can obtain slurries diffusion and concretion state under different moving water flow velocities, different flowing pressure, the different structure face combination condition, Diffusion Law for dissimilar slurries under the research complex geological condition, and then be finally inversed by the theoretical formula of the slurries diffusion that is suitable for generally speaking, for mortar depositing construction provides technical data, reach slip casting effect the best.
Slip casting diffusion test set of the present invention is not limited to the scope of the specific embodiment, and present embodiment just helps to understand, and all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (10)
1. slip casting diffusion test set, it is characterized in that, comprise test fluid generating apparatus, slurries diffusion test set and retracting device, the test fluid generating apparatus will produce grouting serous fluid, provide the experiment material by the grouting pressure, the grouting amount that design to the slurries diffusion test set; Grouting serous fluid can be simulated on the slurries diffusion test set in the slip casting model in various cracks and be spread, the slurries diffusion test set is provided with to see looks into slurries diffusion shape and the window of measuring diffusion term, is provided with the fluid pressure testing arrangement of reading different diffusion length slurries energy consumptions; Retracting device is used to finish the recovery of test job slurries.
2. slip casting diffusion test set according to claim 1 is characterized in that, described test fluid generating apparatus also comprises the current generating apparatus, provides press water to the slurries diffusion test set; In the slurries diffusion test set water jet device is arranged, in moving water jet device, press water forms moving water flow field, and grouting serous fluid spreads in circumstance of flowing water.
3. slip casting diffusion test set according to claim 2 is characterized in that, described moving water jet device setting can realize evenly flowing of current, and can produce the slurries with certain pressure at corresponding site.
4. slip casting diffusion test set according to claim 1 is characterized in that, described slurries diffusion test set has the fissure-plane inclination angle of adjusting and width device.
5. slip casting diffusion test set according to claim 4, it is characterized in that, described adjusting fissure-plane tilt angle device comprises a support, its both upper ends thereof is respectively laid a bearing, two bearings is connected by a round steel that can rotate betwixt, the slip casting pattern board is welded on the round steel, round steel exceeds slip casting pattern board edge positioning disk, positioning disk radial arrangement at interval has circular hole, circular hole fuses by alignment pin with the corresponding circular hole of fixed disk on the support, connects position, different hole and then can realize testing angle.
6. slip casting diffusion test set according to claim 5 is characterized in that, the scope of described test angle is 0～90 °
7. according to claim 1 or 3 described slip casting diffusion test sets, it is characterized in that the slip casting model upper plate of described slurries diffusion test set is the transparent plexiglass plate of band scale.
8. slip casting diffusion test set according to claim 1 is characterized in that, the slot structure face width degree that constitutes between described slip casting pattern board and the slip casting model upper plate can be regulated in the 100mm scope at 0.5mm, but and filling respective substance.
9 slip casting diffusion test sets according to claim 7 is characterized in that, it is the stiffener of steel plate that material is arranged on the described transparent plexiglass plate, prevents the poly (methyl methacrylate) plate compressive deformation.
10 slip casting diffusion test sets according to claim 2 is characterized in that, described moving water jet device is at closed chamber top that slip casting pattern board and upper plate surround, it is a seamless steel pipe with holes, aperture 1mm, length is less than the slurries diffusion test set, and links to each other with moving water generating device.
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