CN103145381A - Double-liquid process grouting material and grouting process using grouting material - Google Patents
Double-liquid process grouting material and grouting process using grouting material Download PDFInfo
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- CN103145381A CN103145381A CN2013100819193A CN201310081919A CN103145381A CN 103145381 A CN103145381 A CN 103145381A CN 2013100819193 A CN2013100819193 A CN 2013100819193A CN 201310081919 A CN201310081919 A CN 201310081919A CN 103145381 A CN103145381 A CN 103145381A
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Abstract
The invention discloses a double-liquid process grouting material and a grouting process of the grouting material. The grouting material consists of cement paste and an additive solution, wherein the additive is prepared by mixing 0.38 parts by weight of sodium metasilicate, 0.12 parts by weight of lithium poatassium and 0.5 parts by weight of calcium chloride; and the grouting process comprises respectively preparing paste materials and instantly mixing and grouting via a special double-liquid grouting paste plug. The grouting material disclosed by the invention satisfies the requirement on dam curtain grouting in regions with high cold, low temperature and large temperature difference day and night; the processes of adding complex components are simplified due to the adoption of the processes of randomly mixing, instantly pouring and grouting; and the additive is mixed with cement paste liquid in a hole through double-liquid grouting, so that the conflict between the pumping time and the setting time of the paste liquid is solved. Due to the preparation method, not only the diffusion of the cement paste liquid is effectively controlled and the re-grouting time is reduced, but also the problem of big control difficulty in the setting time of the paste liquid is solved, so that the investment is effectively reduced, the grouting period is shortened, and the grouting quality conforms to the engineering quality requirement.
Description
Technical field
The invention belongs to building foundation reinforcement seepage control technique field, especially belong to water conservancy and hydropower dam geological foundation grouting reinforcement seepage control technique field, particularly a kind of Dam construction grouting material and grouting process thereof.
Background technology
Existing water resources and hydropower construction usually need to carry out in the high altitude localities, to the operation of dam reinforcement Seepage often because of the factors such as high and cold, that the winter environment temperature is low, day and night temperature is large, slurries time of coagulation is long cause construction can not normal termination, the multiple filling often, have a strong impact on construction speed, particularly curtain grouting areal geology rock mass is multiple educates roomy, as to be breakthrough status crack, and grouting reinforcement Seepage grout consumption is large and can not satisfy requirement of engineering.Injection material and grouting process treating processes thereof and effect are directly connected to the realization as scheduled of water resources and hydropower construction control of investment, total duration target, especially very important dam safety operation.
Existing injection material time of coagulation is long, the slurries range of scatter is large, do not meet in the high altitude localities and use, the method that adds quick setting by adding condensing agent is also arranged, but complicated component, adds without difficult control of controllable method, time of coagulation, but usually occur the pump time short, stop up the problem such as grouting pipeline.The high altitude localities carry out curtain grouting usually need a kind of can convenient construction, controlled, the satisfactory injection material of the quality of condensing and grouting process condense.
Summary of the invention
The present invention has proposed a kind of two-fluid process injection material and grouting process thereof of Dam construction according to the needs of high altitude localities water resources and hydropower construction.The problem to be solved in the present invention is to provide a kind of dam curtain two-fluid process injection material and grouting process thereof that adapts to high and cold low temperature, day and night temperature major region.
The present invention is achieved through the following technical solutions:
The two-fluid process injection material by grout and admixture solution composition, is characterized in that:
The parts by weight of described grout and admixture solution are: grout: 20 parts, and admixture solution: 3 parts;
Wherein grout is mixed by weight 0.5:1 by water and concrete grey; Admixture solution is the solution that water and admixture are mixed with by weight 9:2, and wherein each weight part admixture is mixed by 0.5 part of 0.38 part of Starso, 0.12 part, lithium acid potassium, calcium chloride.
Adopt the two-fluid process grouting process of above-mentioned injection material, comprise the following steps:
(1) admixture preparation; The component of following parts by weight is added in container stir simultaneously Starso: 0.38 part, lithium acid potassium: 0.12 part; Calcium chloride: 0.5 part;
(2) admixture solution preparation: with admixture 0.18 weight part and water 0.82 weight part mixing and stirring in vertical stirring tank of step (1) preparation;
(3) cement grout of 0.5:1 preparation: cement 0.5 weight part and water 1 weight part are evenly mixed system in the pulper of concentrating mixing plant.
(4) grouting: adopt biliquid perfusion simultaneously respectively, also record respectively groundwater increment to grout hole grout injection and admixture solution simultaneously respectively with two grout pumps, observe the input rate of cement grout and admixture solution by grouting automatic recorder, and the controlled grouting pump is pressed the ratio control input rate of 20:3; Adopt the two-shot grouting plug, evenly mix when cement grout is injected in the aperture with admixture solution.
Described two-shot grouting plug comprises inlet pipe and the admixture pipe that is set in parallel in sleeve pipe, and admixture pipe bottom arranges uniform spray orifice, and the spray orifice position is below the inlet pipe outlet.
The present invention has the following advantages:
(1) two-shot grouting can be applicable to various geologic condition, and both effective filled opening, economic, practical again.
(2) cost that adopts two-shot grouting is all lower than Portland cement slurries, conventional slurry, self-compacting mortar cost.
(3) the slurries range of scatter of two-shot grouting is little, effective slurry filling grout consumption, and cement consumption significantly reduces, and belongs to the environmental friendliness engineering, and energy-saving and emission-reduction, benefit are obvious.
(4) under cold condition, the slurries of two-shot grouting solidify comparatively fast, treat that the solidifying time is short, according to shop experiment and test in place achievement, treat that the solidifying time is controlled at 6～12 hours.
(5) two-shot grouting slurries compound method is simple, and required preparation of construction is few, and a three-dimensional steel basin of needs, miniature electric claim, regular barrel gets final product.
The present invention by experiment and incorporation engineering practice for the needs of high altitude localities water resources and hydropower construction, research provides a kind of rapid hardening injection material and grouting process thereof, injection material satisfies the Dam Heavy Curtain Grouting needs of high and cold low temperature, day and night temperature major region, adopt and mix at any time the instant grouting process that injects, simplify each complicated composition adding procedure, but with two-shot grouting make admixture mixes with cement grout in the hole solution slurries pump time and time of coagulation contradiction.The present invention not only effectively controls the cement grout diffusion, reduces multiple filling number of times, solves again slurries and controls difficult problem time of coagulation, and effectively reduce cost, shorten the grouting duration, and grouting quality meets the construction quality requirement.
Description of drawings
Fig. 1 is two-shot grouting plug structure schematic diagram of the present invention.
In figure, the 1st, inlet pipe, the 2nd, tensimeter, the 3rd, admixture pipe, the 4th, spray orifice.
Embodiment
Below by embodiment, the present invention is conducted further description; the present embodiment only is used for the present invention is further detailed; but can not be interpreted as limiting the scope of the invention, those skilled in the art can make some nonessential improvement and adjustment belongs to the scope of protection of the invention according to foregoing.
Injection material
At the scene in grouting construction, mix with admixture solution with the 0.5:1 cement grout, by weight for 9:2 is mixed with solution, admixture is that 0.12 part, the sour potassium of 0.38 part of Starso, lithium, 0.5 part of mixing of calcium chloride form by parts by weight to admixture solution by water and admixture.
During grouting construction, be strictly that 40:6 controls by cement grout and admixture aqueous solution input rate weight ratio.
Construction technology process
Prepare according to the following steps and carry out two-fluid process grouting after cement grout and admixture solution:
(1) admixture preparation; The component of following parts by weight is added in container stir simultaneously Starso: 0.38 part, lithium acid potassium: 0.12 part; Calcium chloride: 0.5 part;
(2) admixture solution preparation: with admixture 0.18 weight part and water 0.82 weight part mixing and stirring in vertical stirring tank of step (1) preparation;
(3) cement grout of 0.5:1 preparation: cement 0.5 weight part and water 1 weight part are evenly mixed system in the pulper of concentrating mixing plant.
(4) grouting: adopt biliquid perfusion simultaneously respectively, also record respectively groundwater increment to grout hole grout injection and admixture solution simultaneously respectively with two grout pumps, observe the input rate of cement grout and admixture solution by grouting automatic recorder, and the controlled grouting pump is pressed the ratio control input rate of 20:3; Adopt the two-shot grouting plug, evenly mix when cement grout is injected in the aperture with admixture solution.
During grouting construction, adopt pulper to prepare the cement grout of 0.5:1, according to water: admixture mass ratio 9:2 preparation admixture solution in groove on vertical stirring tank, inject respectively grout hole by two grout pumps.By grouting automatic recording instrument, adopt manual method to regulate injection rate cement grout and admixture solution input rate are controlled at 40:6.
Adopt drilling rod or spray boom to spray the method for slurries with fixing direction, adopt the two-shot grouting plug, make admixture solution be vaporific and mix with cement grout.
The two-shot grouting plug comprises inlet pipe, tensimeter and valve, be arranged with admixture pipe, spy hole in parallel with inlet pipe, wherein admixture pipe bottom arranges uniform spray orifice and forms floral tube, spray orifice can be in pipe bottom and tube wall setting, the spray orifice position is below the inlet pipe outlet, inlet pipe and admixture pipe share a sleeve pipe, are provided with spy hole in the sleeve pipe upper end and connect the admixture pipe, connect return pipe at the pastry mouth end of inlet pipe.The spray orifice of admixture pipe bottom even setting is the floral tube shape, and admixture is vaporific ejection, can mix fully with slurries; The two-fluid process packer arranges spy hole, when slurries flow out from spy hole, can be with the spy hole valve closes, thus adopting the neat slurry perfusion, grouting pressure can be promoted, reduce hidden danger of quality.
Test example
The present invention with the admixture solution of the cement grout of 0.5:1 and 9:2 in mass ratio 40:6 mix, the observation slurries change, slurries are thinning immediately, initial flow is better than the Portland cement slurries, rear slurry viscosity increased in 3～5 minutes, can become paste in 5～8 minutes, lose flowability in 8～10 minutes, reach the initial set state in 10～15 minutes.
It is Bingham body that slurries have the mixing initial stage, and be body of paste mid-term, and the later stage, rapid intensity rose to the characteristics of plastomer hard plastic gonosome, is fit to be communicated with the control perfusion in crack.
The rapid hardening test
Form slurries after the admixture aqueous solution of admixture different ratios in the 0.5:1 cement grout, carry out the set strength simultaneous test with the plain cement slurries, result is as shown in table 1; As can be seen from Table 1, along with the increase of admixture dosage, 7d ultimate compression strength decreases, and when volume was 2%, slurries are bleed not substantially, and ultimate compression strength is about 80%～90% of plain cement slurries, meets the engineering construction requirement.
Table 1 admixture and plain cement size performance and set strength simultaneous test
Annotate: when admixture dosage be cement quality 2% the time, the blending ratio of cement grout and admixture solution is 40:6.
The slurries slurries bleed rate of two-shot grouting of the present invention can not stay the hole of failing to fill up because the unnecessary elutriation of slurries goes out runaway because of after being in the milk, and because slurries bleed rate is low, slurries calculus structure is closely knit, durable lower than the Portland cement slurries.
In upper table, as seen, during shop experiment, the presetting period of plain cement slurries is 9 hours 42 minutes, and during site operation, because the power station envrionment temperature is low, the Portland cement slurries are long time of coagulation, and even 24 hours slurries do not condense yet.And when adopting two-fluid process grouting, slurries reached the initial set state in 10～15 minutes, treated that the solidifying time is controlled at 6～12 hours, can improve largely construction speed, saved construction cost.
When as seen upper table adopted two-fluid process grouting, the slurries sample ultimate compression strength of 7 days and neat slurry liquid phase ratio reduced by 12.4%, and the reduction amplitude is little, and is little on the engineering construction impact.
The engineering example
Domestic some hydropower station geologic condition is very complicated, off-load stretch-draw cranny development, curtain grouting areal geology rock mass is multiple educate roomy, connect the crack, grout consumption is large; And the power station is located in extremely frigid zones, and more than being positioned at height above sea level 3100m, the winter environment temperature is low, and minimum temperature reaches-15.6 ℃, and maximum temperature difference reaches 27.8 ℃ round the clock, and slurries are long time of coagulation.The problems referred to above are key issues of power station treatment of geologic defect, its treating processes and effect, be directly connected to that the power station gross investment is controlled, benefit is put into operation in the realization as scheduled of total duration target and dam safety operation and power station, so extremely frigid zones is roomy, the processing that connects the crack is the key point of power station foundation treatment engineering.
Be head it off, agree through the owner, adopt the construction of two-shot grouting method.In filling process, be directed to the multiple section time many hole sections of filling with and all adopt two-shot grouting to fill in the row perfusion, fill with again hop count and obviously reduce, retrieve the duration that lags behind because of odjective causes such as geology, lay the foundation for realizing total duration target.
Claims (3)
1. two-fluid process injection material by grout and admixture solution composition, is characterized in that:
The parts by weight of described grout and admixture solution are: grout: 20 parts, and admixture solution: 3 parts;
Wherein grout is mixed by weight 0.5:1 by water and concrete grey; Admixture solution is the solution that water and admixture are mixed with by weight 9:2, and wherein each weight part admixture is mixed by 0.5 part of 0.38 part of Starso, 0.12 part, lithium acid potassium, calcium chloride.
2. the grouting process of the described two-fluid process injection material of claim 1 is characterized in that comprising the following steps:
(1) admixture preparation; The component of following parts by weight is added in container stir simultaneously Starso: 0.38 part, lithium acid potassium: 0.12 part; Calcium chloride: 0.5 part;
(2) admixture solution preparation: with admixture 0.18 weight part and water 0.82 weight part mixing and stirring in vertical stirring tank of step (1) preparation;
(3) cement grout of 0.5:1 preparation: cement 0.5 weight part and water 1 weight part are evenly mixed system in the pulper of concentrating mixing plant;
(4) grouting: adopt biliquid perfusion simultaneously respectively, also record respectively groundwater increment to grout hole grout injection and admixture solution simultaneously respectively with two grout pumps, observe the input rate of cement grout and admixture solution by grouting automatic recorder, and the controlled grouting pump is pressed the ratio control input rate of 20:3; Adopt the two-shot grouting plug, evenly mix when cement grout is injected in the aperture with admixture solution.
3. the grouting process of two-fluid process injection material according to claim 2, it is characterized in that: described two-shot grouting plug comprises inlet pipe and the admixture pipe that is set in parallel in sleeve pipe, admixture pipe bottom arranges uniform spray orifice, and the spray orifice position is below the inlet pipe outlet.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107254882A (en) * | 2017-07-27 | 2017-10-17 | 中国水利水电第八工程局有限公司 | A kind of highly permeable scall Quick leak stoppage apparatus and blocking method |
| CN112647893A (en) * | 2020-12-08 | 2021-04-13 | 四川华电泸定水电有限公司 | Construction method for drilling and pouring by adopting double-slurry mixer |
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2013
- 2013-03-14 CN CN2013100819193A patent/CN103145381A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107254882A (en) * | 2017-07-27 | 2017-10-17 | 中国水利水电第八工程局有限公司 | A kind of highly permeable scall Quick leak stoppage apparatus and blocking method |
| CN112647893A (en) * | 2020-12-08 | 2021-04-13 | 四川华电泸定水电有限公司 | Construction method for drilling and pouring by adopting double-slurry mixer |
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Application publication date: 20130612 |