CN101235632B - Grouting leak-stopping technique - Google Patents
Grouting leak-stopping technique Download PDFInfo
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- CN101235632B CN101235632B CN 200710303443 CN200710303443A CN101235632B CN 101235632 B CN101235632 B CN 101235632B CN 200710303443 CN200710303443 CN 200710303443 CN 200710303443 A CN200710303443 A CN 200710303443A CN 101235632 B CN101235632 B CN 101235632B
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Abstract
The invention relates to a grouting plugging technology, in particular to a plugging technology which aims to hydroelectric project, to hydraulic constructions which have large high pressure water leakage which is caused by structure weakness. The plugging technology of the invention is that arranging at least two grouting injection holes along the leaking direction to respectively inject gauge grouting with different properties.
Description
Technical field
The present invention relates to a kind of grouting leak-stopping technique, particularly at hydroelectric project, the leak-stopping technique of the big percolating water of high pressure appears in hydraulic structure because of fault of construction.
Background technology
Chemical grouting (Chemical Grouting) is that certain chemical material (inorganic or organic material) is mixed with true solution, with force feed equipment such as chemical grouting pumps it is poured in stratum or the slit, make its infiltration, diffusion, gelling or curing, to increase formation strength, reduce stratum permeability, prevent stratum deformation and to carry out a underpinning, waterproofing and leakage-stopping and the concrete defect reinforcement technology that repair in the concrete structure crack.Be that chemical grouting is that chemistry combines with engineering, applied chemistry science, chemical grouting material and engineering are carried out basis and concrete defect and are handled (reinforcement and strengthening, water seepage prevention), guarantee engineering carry out smoothly or so as to a technology of raising workmanship.
The most frequently used chemical grouting material can be divided into two big classes at present, six series, and up to a hundred brands: the one, the water seepage prevention class has water glass, acrylates, soluble polyurethane, elastic polyurethane and lignin slurry etc.; The 2nd, the reinforcement and strengthening class has epoxy resin, methymethacrylate, hydrophobic polyurethane slurry etc., and using maximum in recent years is water glass, polyurethane and epoxy resin grout material.
Also have a class be the most frequently used in the Grouting engineering be Portland cement.The main performance of neat slurry is as follows: (1) material source is extensive, and cost is lower, avirulence, and construction technology is simple and convenient.(2) viscosity becomes with water/binder ratio, can be as small as 16s, greatly to 139s.(3) prolong with the increase of water/binder ratio time of setting, from a few hours by tens of hours.(4) compressive strength can reach 22.0MPa.(5) the calculus rate can reach 99%.(6) poor stability easily precipitates bleed, and during slip casting, slurries are subject to washing away of water and dilute under the bigger condition of groundwater velocity.
For improving cement slurry property, can mix admixture such as cohesive soil, water glass, flyash etc.Cement clay plasmoid humor for example.Cement clay slurries are to be mixed by a certain percentage by the cement clay.During as consolidation grouting, the clay volume is generally 5%～15%.Because clay is dispersed high, good hydrophilic property, thereby the precipitation bleed is less.The stability of cement clay slurries improves greatly.Cement water glass plasmoid humor for another example.Cement water glass slurries also claim the CS slurries, are to be host with cement and water glass, and both adopt the biliquid mode to flow into according to a certain percentage, add the injecting paste material that accelerating admixture or retarding agent are formed in case of necessity.It overcome time of setting of single liquid cement paste long and can not control, shortcoming such as the calculus rate is low, improved the effect of cement injection, enlarged the scope of application of cement injection.Can be used for antiseepage Hui Gu.The characteristics of cement water glass slurries: (1) slurries gel time can be controlled in several seconds in the dozens of minutes scope; (2) Baume degrees is more little, and gelling is fast more; The water glass volume is few more, and gelling is fast more; (3) calculus body compressive strength is higher, can reach 10～20MPa; The calculus rate can reach 100%; (4) calculus body transmission coefficient is 10-3cm/s; (5) can be used for the crack is that above rock mass of 0.2mm or particle diameter are the above layer of sand of 1mm; (6) material source is abundant, and price is cheaper; (7) environment and underground water avirulence are polluted.
Conventional grouting leak-stopping technique adopts single hole, single liquid (mixed liquor) grouting process more, mainly is to utilize the rapid solidification of slurries (chemical grout or cement-accelerating admixture biliquid) to be used for finishing grouting leak-stopping.But because of the rapid hardening slurries all exist slurries gelled instantaneously body intensity lower, be easy to by the erosion of high pressure seepage flow when meeting the big percolating water of high pressure or extrude, and cause the leak stopping failure.
The equipment of implementing grouting leak-stopping technique is also disclosed in the prior art, and activities.
Summary of the invention
Leak-stopping technique provided by the invention is by arranging at least two injected holes along the seepage direction, pouring into two kinds of rapid hardening slurries that performance is different respectively.
Preferably the upstream perfusion is chemical grout, downstream cement injection-accelerating admixture biliquid slurries.
More preferably, said chemical grout is a polyurethane.
The slurries that the slurries protection downstream aperture that wherein pours in upstream orifice pours into; avoid or reduce the water under high pressure punching failure; simultaneously the slurries that pour into of downstream aperture stop and promote the hole slurries and as far as possible upstream spread; thereby realize " complementation up and down, hard and soft combination, fully spread, effectively solidify "; guarantee slurries hardening times; improve solidification intensity, realize effectively leak stopping fast.
Determining hole count as required along the injected hole of arranging on the seepage direction.The quantity of upstream protectiveness slurries injected hole is more than leak stopping slurries hole, downstream in some cases.
Usually anti-seeping grouting is generally only considered the pouring into property of slurries to the selection of pressure, and for the big percolating water (flow 〉=1000m of high pressure
3/ h, pressure 〉=1.0MPa),, also be difficult to effectively diffusion even slurries enter leakage passage, many under the effect of high pressure seepage water, be flushed away or extrude along seepage direction.For this reason, in the grouting leak-stopping technique provided by the invention, its grouting pressure is designed to 2～3 times of percolating water pressure, can balance percolating water pressure and along the diffusion simultaneously up and down of seepage direction to impel the slurries that pour into, with the expansion face that blocks water, eliminate hydraulic pressure substantially to pouring into the influence of slurries.
Employed equipment all can adopt existing equipment among the present invention.
Leak-stopping technique provided by the invention has been realized " complementary up and down, steel gentle in conjunction with, fully diffusion, effectively solidify ", guarantees slurries hardening times to improve solidification intensity, realizes effectively leak stopping fast.
The specific embodiment
1. bore process
(1) when passing penetrating passage the high-pressure injection current can appear owing to hole, cause the job site inclement condition on the one hand, simultaneously to the very difficult following plug scheme implementation routinely of follow-up grouting, for this reason, before boring is worn and is oozed, installed the aperture sealer earlier, sealer is provided with the by-pass flow switch, is convenient to wear the normal mounting of oozing the post-grouting facility.
(2) boring adopts geology to bore pore-creating, opening diameter φ 75m (the aperture sealer is installed), and boring aperture φ 59mm, boring grouping symmetry hockets, and with boring with filling.
(3) water burst of observation boring in good time situation in the boring procedure is so that find leakage passage accurately.As occurring bigger burst water burst in the boring procedure, promptly stop boring, and implement set anti-seeping grouting scheme earlier.
2. grouting process
(1) " aperture sealing, unidirectional single liquid, catch up with irritate synchronous, pure pressure pour into " technology is adopted in chemical grouting.
(2) " aperture Forced Mixing, the pure pressure perfusion of biliquid " technology is adopted in cement-accelerating admixture two-shot grouting.
Above-mentioned said technology all is the conventional grouting method of this area.
(3) in conjunction with two kinds of slurry characteristics, upstream orifice perfusion chemical grout (meet water cure, block water fast), downstream aperture cement injection-water glass biliquid slurries (rapid hardening, morning degree).Two kinds of slurries pour into simultaneously, so as to reaching " diplopore biliquid, high pressure pouring, hard and soft combination, fast blockage ".
(4) bigger grouting pressure is adopted in grouting as far as possible, in 2～3 times of scopes of percolating water pressure, guarantees to spread around the slurries.For reaching the grouting pressure of drafting, must guarantee enough stock volumes, adopt the high voltage pulse perfusion in case of necessity.
(5) continous pouring is taked in grouting as far as possible, when causing the grouting slurry to be difficult to carry out as bigger string (emitting) occurring, then stops to irritate, analyzes, handles, adjusts the back and continue perfusion.
(6) adopt the quantitative perfusion method to pour into, promptly the slurries in perfusion do not have under the situation about leaking outside substantially, reach the filling grouting amount of theoretical calculation after, promptly finish grouting.
Claims (2)
1. grouting leak-stopping technique is characterized in that pouring into two kinds of rapid hardening slurries that performance is different in the different grout holes respectively by arranging at least two injected holes along the seepage direction, and what poured into the upstream is chemical grout, downstream cement injection-accelerating admixture biliquid slurries; Grouting pressure is designed to 2～3 times of percolating water pressure.
2. grouting leak-stopping technique according to claim 1 is characterized in that said chemical grout is a polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710303443 CN101235632B (en) | 2007-12-28 | 2007-12-28 | Grouting leak-stopping technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710303443 CN101235632B (en) | 2007-12-28 | 2007-12-28 | Grouting leak-stopping technique |
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| Publication Number | Publication Date |
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| CN101235632A CN101235632A (en) | 2008-08-06 |
| CN101235632B true CN101235632B (en) | 2010-06-02 |
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| CN 200710303443 Active CN101235632B (en) | 2007-12-28 | 2007-12-28 | Grouting leak-stopping technique |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434124A (en) * | 2010-09-29 | 2012-05-02 | 中国石油化工股份有限公司 | Successive-compounding-process based plugging method for well drilling |
| CN103215922A (en) * | 2013-04-09 | 2013-07-24 | 长江勘测规划设计研究有限责任公司 | High-pressure high-flow centralized leakage grouting leaking stoppage method |
| CN103967313B (en) * | 2014-04-16 | 2016-03-30 | 广州市恒盛建设工程有限公司 | A kind of water-proof repairing method of steel concrete squat silo roof |
| CN104047266A (en) * | 2014-06-27 | 2014-09-17 | 黄河勘测规划设计有限公司 | Seepage-proofing and leaking-stoppage method of leakage passage |
| CN104612108B (en) * | 2015-01-14 | 2016-06-01 | 重庆三峡学院 | The construction technology of a kind of hidden large fracture of the leak stopping dam foundation |
| CN108119143B (en) * | 2017-12-20 | 2019-11-15 | 湖南科技大学 | A kind of vertical shaft working surface cement soluble glass paste combines grouting method with chemical grout double-round curtain |
| CN109555536B (en) * | 2018-11-01 | 2020-10-30 | 山东大学 | Layered sequencing multi-slurry combined pressure reduction cutoff grouting control method and system |
| CN109680653B (en) * | 2018-12-17 | 2023-09-26 | 中国电建集团贵阳勘测设计研究院有限公司 | Geomembrane core wall seepage-proofing body reinforcing structure |
| CN112253042A (en) * | 2020-10-28 | 2021-01-22 | 北京中海沃邦能源投资有限公司 | Leakage stopping method |
| CN113461376B (en) * | 2021-07-28 | 2023-08-15 | 核工业华东建设工程集团有限公司 | Grouting slurry and grouting method for reinforcing tunnel hole |
| CN113956648B (en) * | 2021-11-26 | 2023-02-03 | 山西凝固力新型材料股份有限公司 | High-strength silicate/polyurethane urea-based composite reinforcing material and preparation method thereof |
Citations (4)
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|---|---|---|---|---|
| CN1380470A (en) * | 2001-04-13 | 2002-11-20 | 河北省水利工程局 | Impervious wall construction and soilslip-resisting and leakage-blocking process |
| CN1546842A (en) * | 2003-12-11 | 2004-11-17 | 广州市泰利斯固结补强工程有限公司 | Construction method of leakage waterstop for shield tunnel concrete structure segments |
| CN1629406A (en) * | 2004-10-20 | 2005-06-22 | 葛扬安 | Method for treating depression watertight in hydraulic engineering by employing yellow mud grout |
| CN1657718A (en) * | 2004-02-17 | 2005-08-24 | 上海市普陀区市政工程管理署 | Method for repairing sewer using water-proof film lining |
-
2007
- 2007-12-28 CN CN 200710303443 patent/CN101235632B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380470A (en) * | 2001-04-13 | 2002-11-20 | 河北省水利工程局 | Impervious wall construction and soilslip-resisting and leakage-blocking process |
| CN1546842A (en) * | 2003-12-11 | 2004-11-17 | 广州市泰利斯固结补强工程有限公司 | Construction method of leakage waterstop for shield tunnel concrete structure segments |
| CN1657718A (en) * | 2004-02-17 | 2005-08-24 | 上海市普陀区市政工程管理署 | Method for repairing sewer using water-proof film lining |
| CN1629406A (en) * | 2004-10-20 | 2005-06-22 | 葛扬安 | Method for treating depression watertight in hydraulic engineering by employing yellow mud grout |
Non-Patent Citations (1)
| Title |
|---|
| JP平9-143958A 1997.06.03 |
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| CN101235632A (en) | 2008-08-06 |
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Owner name: CHINA POWER GROUP ZHONGNAN INVESTIGATION DESIGN + Free format text: FORMER NAME: ZHONGNAN PROSPECTING DESIGN INST. CHINA HYDRAUELECTRIC CONSULTANT GROUP |
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Address after: 410014 Hunan province Changsha Yuhua District, camphor Road No. 16 Patentee after: Company limited of Central-South survey and design research institute of electricity Jian group of China Address before: 410014, 9 camphor Road, Yuhua District, Hunan, Changsha Patentee before: Zhongnan Prospecting Design Inst. China Hydrauelectric Consultant Group |