CN205262908U - Measure radial test device of biliquid thick liquid slip casting diffusion - Google Patents
Measure radial test device of biliquid thick liquid slip casting diffusion Download PDFInfo
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- CN205262908U CN205262908U CN201521131897.8U CN201521131897U CN205262908U CN 205262908 U CN205262908 U CN 205262908U CN 201521131897 U CN201521131897 U CN 201521131897U CN 205262908 U CN205262908 U CN 205262908U
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Abstract
The utility model discloses a measure radial test device of biliquid thick liquid slip casting diffusion, including sand system and slip casting system, the sand system includes water container and sealed sand container, and the bottom and the water container intercommunication of sand container are equipped with compacting sand sample in the sand container, the slip casting system includes atmospheric pressure source and sealed storage thick liquid container, is equipped with the biliquid thick liquid in the storage thick liquid container, atmospheric pressure source and the top intercommunication that stores up the thick liquid container, the bottom and slip casting pipe intercommunication of storing up the thick liquid container, the lower extreme of slip casting pipe passes the top cap of sand container, vertically inserts the sand sample, and the injected hole has been seted up to the part that the slip casting pipe inserted in the sand sample. The utility model discloses the slip casting environment of biliquid thick liquid during the simulation engineering is actual records the slip casting diffusion radius of biliquid thick liquid under the grouting pressure of difference, for the engineering in actual the radial sureness of slip casting diffusion provide theoretical reference, reduced the radial measuring error of slip casting diffusion greatly.
Description
Technical field
The utility model relates to biliquid slurry testing performance of grouting equipment technical field, is specifically related to a kind of experimental rig of measuring biliquid slurry slip casting diffusion radius.
Background technology
In deep-foundation pit engineering, often adopt the slip casting of biliquid slurry, reinforce sand stratum, form waterproof of man. The diffusion radius of slurries is important parameters of evaluating grouting quality, in order to form airtight waterproof of man, must make grout spreading range be greater than the spacing of injected hole, forms mutually and overlaps to guarantee that biliquid is starched between effective reinforcing pile.
At present, the diffusion radius of slurries adopts empirical equation or field trial to determine conventionally. But, the diffusion radius of slurries and infiltration coefficient and the grouting pressure etc. on coverage and stratum are closely related, for Different Strata, all there is larger difference in grating and permeability, the grouting amount scope calculating by empirical equation is excessive, grouting amount is difficult to control, and the range of scatter test error of slurries is large; Field trial refers to the scope of progressively exploring grout spreading range by setting inspecting hole at injected hole periphery, can not accurately obtain the diffusion radius of slurries, is difficult to observe intuitively slip casting effect, and consuming time long, expense is higher. Therefore, be necessary prior art to improve.
Summary of the invention
Technical problem to be solved in the utility model is, for the deficiencies in the prior art, provides that a kind of test result is accurate, efficiency is high, is applicable to the biliquid slurry slip casting diffusion radius testing arrangement of Different Strata.
The technical solution adopted in the utility model is: a kind of experimental rig of measuring biliquid slurry slip casting diffusion radius, mainly comprise sand system and filling system, wherein: sand system comprises the sand container of tank and sealing, the bottom of sand container is communicated with tank by pipeline, and the sand sample of compacting is housed in sand container; Filling system comprises the storage slurry container of pneumatic supply and sealing, in storage slurry container, biliquid slurry is housed; Described pneumatic supply is communicated with the top of storage slurry container, and the bottom of storage slurry container is communicated with Grouting Pipe, and, through the top cover of sand container, vertically insert in sand sample the lower end of Grouting Pipe, and the part that Grouting Pipe is inserted in sand sample offers injected hole; On the pipeline of Grouting Pipe and the connection of storage slurry container, dispose grouting pressure distributing valve, on the pipeline being communicated with storage slurry container at pneumatic supply, configure air pressure distributing valve.
Press such scheme, described experimental rig also comprises multiple pore pressure gauges, and pore pressure gauge, centered by Grouting Pipe, is radially distributed in sand sample.
Press such scheme, described pneumatic supply disposes barometer.
Press such scheme, described sand sample is divided into multilayer, every layer of equal compacting; In every layer of sand sample, centered by Grouting Pipe, radially pore pressure gauge is arranged at interval.
Press such scheme, described Grouting Pipe is floral tube, and injected hole is equilateral triangle at the tube wall of Grouting Pipe and distributes.
Press such scheme, the aperture of described injected hole is 3 ~ 5mm.
The beneficial effects of the utility model are: 1) the slip casting environment of biliquid slurry in the utility model model engineering reality, record the slip casting diffusion radius of biliquid slurry under different grouting pressures, for definite theoretical reference that provides of slip casting diffusion radius in engineering reality, greatly reduce the measure error of slip casting diffusion radius, can be sooner, more accurate evaluation slip casting coverage and slip casting effect; 2) the utility model adopts multilayer sand sample, can record under same grouting pressure, and slip casting range of scatter in the Different Strata of same position, measurement result is comprehensive; 3) the utility model is reasonable in design, and the degree of accuracy is high, for assessment and the research of the biliquid slurry slip casting effect in engineering reality provide measurement means, has important research and engineering practice meaning.
Brief description of the drawings
Fig. 1 is the structural representation of a specific embodiment of the utility model.
Wherein: 1, sand container; 2, sand sample; 3, Grouting Pipe; 4, grouting pressure distributing valve; 5, storage slurry container; 6, biliquid slurry; 7, O RunddichtringO; 8, base plate; 9, slurries conveyance conduit; 10, air-pressure duct; 11, baroswitch; 12, pneumatic supply; 13, air pressure distributing valve; 14, barometer; 15, pore pressure gauge; 16, tank; 17, inlet channel.
Detailed description of the invention
In order to understand better the utility model, below in conjunction with the drawings and specific embodiments, the utility model is further described.
A kind of experimental rig of measuring biliquid slurry slip casting diffusion radius as shown in Figure 1, mainly comprise sand system and filling system and test macro, wherein: sand system comprises the sand container 1 of tank 16 and sealing, the bottom of sand container 1 is communicated with tank 16 by inlet channel 17, and the sand sample 2 of compacting is housed in sand container 1; Filling system comprises the storage slurry container 5 of pneumatic supply 12 and sealing, in storage slurry container 5, biliquid slurry 6 is housed, and pneumatic supply 12 disposes barometer 14; Pneumatic supply 12 is communicated with the top of storage slurry container 5 by air-pressure duct 10, is installed on the gentle pressure valve 13 that is press-fitted of baroswitch 11 on air-pressure duct 10; The bottom of storage slurry container 5 is communicated with Grouting Pipe 3 by slurries conveyance conduit 9, disposes grouting pressure distributing valve 4 on slurries conveyance conduit 9; , through the top cover of sand container, vertically insert in sand sample 2 lower end of Grouting Pipe 3, and the part that Grouting Pipe 3 is inserted sand sample 2 offers injected hole; Described experimental rig also comprises multiple pore pressure gauges 15, and pore pressure gauge 15, centered by Grouting Pipe 3, is radially distributed in sand sample 2.
In the utility model, sand sample 2 is divided into multilayer, every layer of equal compacting; In every layer of sand sample 2, multiple pore pressure gauges 15 are arranged at along continuous straight runs interval; Grouting Pipe 3 is floral tube, and injected hole is equilateral triangle at the tube wall of Grouting Pipe 3 and distributes; The vertical spacing of upper and lower two injected holes is 30 ~ 40mm; The aperture of injected hole is 3 ~ 5mm; Storage slurry container 5 comprises the base plate 8 of sidewall, top board and metal, and base plate 8 is connected with sidewall, and seals by O RunddichtringO 7.
Utilize said apparatus to measure biliquid slurry slip casting diffusion radius, the whole process of this measurement is carried out in the controlled environment of temperature, in order to avoid similar test slurries change greatly setting time, causes measure error. Measuring process specifically comprises the following steps:
Step 1, provide experimental rig as above: metal or lucite container that the storage slurry container 5 in the present embodiment is 400mm for high 500mm, internal diameter; Pore pressure gauge 15 can adopt vibrating wire piezometer, and its range is not less than 1000kPa, and precision is not less than 1kPa; It is the floral tube of 20mm that Grouting Pipe 3 adopts diameter, and the injected hole in Grouting Pipe 3 is equilateral triangle to be arranged, and injected hole is positioned on the tube wall of Grouting Pipe 3 lower end 5 ~ 500mm.
Step 2, gather sand sample 2, sand sample 2 is placed in the baking box of 100 DEG C and dries 24 hours, and test grating, dry density and the infiltration coefficient of sand sample 2, to determine native fundamental type, with the soil property contrast reference in engineering reality.
Step 3,2 points five layers, sand sample is put into sand container 1, every layer is hit and hair is scraped in top layer after real and process, and two pore pressure gauges 15 are imbedded at interval, re-lay lower one deck sand sample 2 and hit reality; Thickness after every layer of sand sample 2 hits is in fact 150mm, and packing is 85% ~ 95%; The pore pressure gauge 15 of each layer is 150mm, 300mm, 450mm and 600mm apart from the distance of sand container 1 bottom surface.
Step 4, open the switch of inlet channel 17, the water in tank 16 infiltrates to top from the bottom of sand container 1, and progressively exhaust is saturated from bottom to top for sand sample 2, and the water surface in saturated rear maintenance sand container 1 is all the time higher than the upper surface of sand sample 2; After saturated completing, sand container 1 inside is vacuumized to 24 hours.
Step 5, in the interior vertical insertion Grouting Pipe 3 of sand sample 2, to set depth, (two pore pressure gauges 15 are 150mm, 300mm with the distance of Grouting Pipe 3 respectively; In actual measurement, when grouting pressure is larger, can Grouting Pipe 3 centered by, radially evenly multiple pore pressure gauges 15 are buried at interval underground); Be cement and the waterglass uniform stirring configuration biliquid slurry 6 of 1:1 left and right with volume, control the Baume degrees of waterglass, ensure that the setting time of biliquid slurry 6 is in 2 ~ 12h; By in biliquid slurry 6 input storage slurry containers 5, seal storage slurry container 5 again.
Step 6, open air pressure distributing valve 13, regulate grouting pressure distributing valve 4, apply grouting pressure until grouting pressure reaches setting value by pneumatic supply 12 to storage slurry container 5, biliquid slurry 6 in storage slurry container 5 is in slurries conveyance conduit 9 flows into Grouting Pipe 3, record in slip casting process the registration of each layer of sand sample 2 Pore Pressure meter 15 and grouting pressure distributing valve 4, and draw the change curve of grouting pressure-pore water pressure.
Step 7, slip casting finish, after 48 hours, to excavate sand sample 2, measure pile radius and effective slip casting diffusion radius of biliquid slurry 6.
Measure the slip casting diffusion radius of biliquid slurry 6 under multiple setting grouting pressure by said method, and draw the change curve of grouting pressure-pore water pressure, can obtain under different setting grouting pressures the pore water pressure size at the each point place different from Grouting Pipe 3 distances according to curve map; Estimate again diffusion radius and the coverage of slip casting according to each point place pore water pressure: pore water pressure is less, and the impact of slip casting is less; And the actual measured value of this estimated value and slip casting diffusion radius is contrasted, and comprehensively multi-group data is rationally revised estimated value, finally obtains the slip casting diffusion radius in error range. Because the sand sample 2 in sand system is distinct with the soil property in engineering reality, the biliquid slurry slip casting diffusion radius that this measurement device obtains is theoretic reference value, compared with spreading radius with actual slip casting, there is certain error, can revise reference value according to the situation of actual soil property, to obtain the diffusion of slip casting more accurately radius, further assess coverage and the effect of slip casting.
These are only preferred embodiment of the present utility model; be not limited to the utility model; although the utility model is had been described in detail with reference to embodiment; for a person skilled in the art; its technical scheme that still can record aforementioned each embodiment is modified; or part technical characterictic is wherein equal to replacement; but all within spirit of the present utility model and principle; any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. measure the experimental rig of biliquid slurry slip casting diffusion radius for one kind, it is characterized in that, mainly comprise sand system and filling system, wherein: sand system comprises the sand container of tank and sealing, the bottom of sand container is communicated with tank by pipeline, and the sand sample of compacting is housed in sand container; Filling system comprises the storage slurry container of pneumatic supply and sealing, in storage slurry container, biliquid slurry is housed; Described pneumatic supply is communicated with the top of storage slurry container, and the bottom of storage slurry container is communicated with Grouting Pipe, and, through the top cover of sand container, vertically insert in sand sample the lower end of Grouting Pipe, and the part that Grouting Pipe is inserted in sand sample offers injected hole; On the pipeline of Grouting Pipe and the connection of storage slurry container, dispose grouting pressure distributing valve, on the pipeline being communicated with storage slurry container at pneumatic supply, configure air pressure distributing valve.
2. a kind of experimental rig of measuring biliquid slurry slip casting diffusion radius as claimed in claim 1, is characterized in that, described experimental rig also comprises multiple pore pressure gauges, and pore pressure gauge, centered by Grouting Pipe, is radially distributed in sand sample.
3. a kind of experimental rig of measuring biliquid slurry slip casting diffusion radius as claimed in claim 1, is characterized in that, described pneumatic supply disposes barometer.
4. a kind of experimental rig of measuring biliquid slurry slip casting diffusion radius as claimed in claim 1, is characterized in that, described sand sample is divided into multilayer compacting; In every layer of sand sample, centered by Grouting Pipe, radially pore pressure gauge is arranged at interval.
5. a kind of experimental rig of measuring biliquid slurry slip casting diffusion radius as claimed in claim 1, is characterized in that, described Grouting Pipe is floral tube, and injected hole is equilateral triangle at the tube wall of Grouting Pipe and distributes.
6. a kind of experimental rig of measuring biliquid slurry slip casting diffusion radius as claimed in claim 1, is characterized in that, the aperture of described injected hole is 3 ~ 5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521131897.8U CN205262908U (en) | 2015-12-30 | 2015-12-30 | Measure radial test device of biliquid thick liquid slip casting diffusion |
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| CN201521131897.8U CN205262908U (en) | 2015-12-30 | 2015-12-30 | Measure radial test device of biliquid thick liquid slip casting diffusion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109142686A (en) * | 2018-11-06 | 2019-01-04 | 重庆大学 | The repeatable grouting test system in interior and Seed harvest radius measuring method |
-
2015
- 2015-12-30 CN CN201521131897.8U patent/CN205262908U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109142686A (en) * | 2018-11-06 | 2019-01-04 | 重庆大学 | The repeatable grouting test system in interior and Seed harvest radius measuring method |
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