CN102174818A - Controlled impermeable leaking stoppage grout-extruding water-stopping technology of strong water permeable stratum of quaternary system - Google Patents
Controlled impermeable leaking stoppage grout-extruding water-stopping technology of strong water permeable stratum of quaternary system Download PDFInfo
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- CN102174818A CN102174818A CN2011100739537A CN201110073953A CN102174818A CN 102174818 A CN102174818 A CN 102174818A CN 2011100739537 A CN2011100739537 A CN 2011100739537A CN 201110073953 A CN201110073953 A CN 201110073953A CN 102174818 A CN102174818 A CN 102174818A
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Abstract
The invention provides a controlled impermeable leaking stoppage grout-extruding water-stopping technology of a strong water permeable stratum of a quaternary system, and the technology is characterized in that the smaller fluidity of serum is utilized to control the diffusion radius of the serum, the grouts are extruded at high pressure from bottom to top in a segment mode, so that the serum is extruded into a permeable stratum to block off permeable pores so as to form an impermeable curtain, thereby achieving the purpose of blocking the strong water permeable stratum. The impermeable leaking stoppage grout-extruding water-stopping grouting technology and parameters are contained. The technology is mainly applied to the impermeability of strong water permeable stratums with permeability coefficient above 1-1*10<-3>cm/s and emergent leaking stoppage treatment for surge of water bursting in foundation pits, karst water bursting, cofferdam body and foundation water stopping, water stopping in side slopes of surface mines, water bursting in water supply engineering pump station foundations, water bursting in bridge foundation pits, water bursting in foundations of high rising buildings, water bursting in river-crossing building foundations and tunnels in water conservancy and hydropower engineering and other engineering.
Description
Technical field
The present invention relates to water power, traffic, mine, calamity administer the geotechnical engineering field of subject in the engineering, be specifically related to dam, reservoir, mine, building foundation pit, underground construction, the controlled impervious leakage-stopping on Quaternary system highly permeable stratum of the emergent consolidation process of the antiseepage that contains the highly permeable stratum, anti-seeping grouting and engineering in the engineering foundations such as calamity improvement clamp-on grouting sealing technology.
Background technology
To gush in Quaternary system highly permeable stratum and the karst ground, gushing water is administered and the percolating water emergency work is handled in the construction of being everlasting and required instant effect, and environmental protection and economy is to improve the integrated engineering benefit.Main both at home and abroad in the past adopt drainage, impervious wall method and conventional grouting method often arranged.
Wherein, drainage causes stratum dehydration, ground and the sinking of peripheral structure on a large scale easily, surface water is dry, ftracture in ground even cause new geological disaster, and the cycle is long, and effect is very limited.
Concrete cutoff wall is by adopting the excavation grooving earlier of corresponding machinery, toward the interior concreting of groove section, make it to form continuous concrete cutoff wall again, leaking and seepage to stop water body.Impervious wall cell body excavation needs the regular hour, after the groove section forms, water body is arranged in the groove section rapidly in meeting under the head effect and is overflow in the aquifer, very easily cause groove section body of wall to collapse, the grooving difficulty is very big, in addition, concrete is built in the process, also can be subjected to the jacking of head and washing away of current, make concrete build leakiness, segregation, not have the effect of impervious leakage-stopping.This method is not suitable for the impervious leakage-stopping construction in the loose highly permeable layer.
Grouting method commonly used has high-pressure injection method, conventional grouting.The high pressure jet grouting method ties up to utilizes water under high pressure or high mud jacking stream that the soil body is cut in the boring, and forms the cement-soil mixture with the abundant mix of the soil body after cement grout and the cutting, and each grout piling wall overlaps the whole antiseepage effect of playing mutually.Because whole formation of high spray impervious wall controlled by following factors: boring gradient, hole depth, cutting water pressure, the rate of set of slurry, the naughty erosion effect of underflow, the continuity of body of wall.Wherein especially the effect least favorable body of wall of groundwater flow forms continuously, and promptly when head was higher, the aperture was opened wide during owing to high spray, the puddled soil mixed liquor that sprays into is under flow action, taken away by artesian flow in the hole from weak part, cause body of wall discontinuous, cause whole anti-seepage effect poor.Therefore high pressure jet grouting is difficult in and forms continuous body of wall in the highly permeable layer under the quick flox condition of underground water, does not reach the effect at this stratum impervious leakage-stopping.
Conventional curtain grouting is to adopt boring to utilize cement paste or clay cement grout to irritate section with being pumped into, hole in the filling soil layer, in a row form curtain then continuously, stop water body to leak, this method is in the strong aquifer of water permeability, be subjected to the filling scope wide, slurry material consumption is big, slurries can be far away in the strong level diffusion of water permeability, be difficult in vertical direction and form continuous curtain body, execute this cost height, anti-seepage effect is poor, be difficult to the construction of quick-speed anti-seep plugging curtain in the suitable loose aquifer, do not satisfy the needs of highly permeable stratum antiseepage.
Summary of the invention
Handle needs in order to satisfy impervious leakage-stopping engineering construction of loose highly permeable stratum and emergency work, gush the deficiency that exists in the gushing water problem at prior art in Ground Treatment, the invention provides a kind of new slurry material construction technology that is applied to the antiseepage of highly permeable stratum, leak stopping, grouting, at the characteristics that leakage is big in the highly permeable stratum, groundwater velocity is fast, carry out the impervious leakage-stopping grouting construction, can reach good antiseepage, plugging effect fast.
Technical problem solved by the invention realizes by the following technical solutions:
The controlled impervious leakage-stopping on Quaternary system highly permeable stratum is clamp-oned grouting sealing technology, and the degree of mobilization of reperfusion serosity is that 60～200mm(is measured with the disk method, with reference to standard GB/T 8077, down together), the employing grouting pressure is 0.5～5.0MPa; The job practices that adopts for from bottom to top, segmentation, height be pressed into control and be in the milk, in order to form effective sealing curtain body or stifled body.
Wherein, grouting agent can be that in cement, clay, mud, slag, flyash, water granulated slag, water glass, silty clay, aluminium sulfate, the triethanolamine one or more mix the back and form with water.
Utilize the slurry self-solidifying or the sealing of banketing, be pressed into controlled grouting, impervious leakage-stopping grouting is carried out on the highly permeable stratum formed the seepage proof curtain body, reach the purpose of quick-speed anti-seep plugging by segmentation from bottom to top, pulsation height.
Stratum of the present invention is meant that transmission coefficient is greater than 1 ~ 10
-3The sandy gravel of cm/s, float loose highly permeable stratum that the footpath is thick such as cobble, artificial earth fill.
Among the present invention, grouting pressure is encrypted with the grouting order, and grouting pressure improves by preface; The amount of pouring into slurries grouting pressure big and that degree of mobilization is good is little, and the amount of pouring into slurries grouting pressure few and that degree of mobilization is little is then big.
Slurries used in the present invention have visco-plasticity preferably, and at the grout outlet place, grouting pressure is clamp-oned slurries in the hole greater than the cohesive strength of slurries and the resistance in the permeable stratum hole; When slurries left the pulp mouth of pipe and decayed to less than the cohesive strength of slurries and the resistance in the permeable stratum hole to grouting pressure, slurry stopped to move, thereby reaches the control grout spreading range, forms the purpose of effective antiseepage body or stifled body.
Be pressed into the intrapore master of acting as of scall with slurries by height in the filling process, with splitting, compacted act as auxilliary.Infiltration in the effect of clamp-oning and the existing construction, compacted, the fracture grouting mechanism of action is different, clamp-oning is to have certain viscoplastic slurry, to be squeezed in the water permeability stratum by grouting pressure, different with osmosis mechanism, the penetration radius of slurries is controlled.
The present invention's effect of clamp-oning is that compacted effect is by pressure the hole in the compacted stratum of slurry to be act as the master with the difference of compacted effect; And slabbing action is meant with the splitting stratum and act as the master, and the stratum is produced new splitting, and slurries form some and starch arteries and veins in the stratum.
Beneficial effect: the present invention is directed to the characteristics that leakage is big in the highly permeable stratum, groundwater velocity is fast, carry out the impervious leakage-stopping grouting construction, can reach good antiseepage, plugging effect fast.
The specific embodiment
Give an actual example below and describe the present invention.
Embodiment one: certain Curtain Grouting
Project profile: the covering layer at certain place, river-crossing tunnel engineering hole is silty clay, sandy gravel, and the bottom is a mud stone.The groundwater table height, water yield is big, and its transmission coefficient reaches more than the 0.1cm/s.
Construction: arrange rectangle curtain hole in the scope of distance hole periphery 40m * 10m, grout hole spacing 1.0m, curtain go deep into severely-weathered layer 0.5m, and the degree of mobilization of the employed grouting slurries of technology is 150mm; Grouting pressure is 2.0MPa; The job practices that adopts be the sealing of uncork thixotroping slurry, from bottom to top, segmentation, clamp-on infiltration.Adopting main material is cement, flyash, silty clay, water glass.
Construction effect: adopting the two-shot grouting device systems, is main material with cement, flyash, silty clay, outer water mixing glass, and mixing the formation degree of mobilization outside the hole is the slurries of 120mm.Inject the stratum uniformly by Grouting Pipe again, slurries are clamp-oned the main mode that act as, be filled into hole in the hole in the sandy gravel, and utilize the visco-plasticity and the internal friction power of slurries, slurries are controlled in the effective range of scatter, form the good water seepage prevention curtain of water isolating one, intercepted in sand pebble layer the hydraulic connection of sandy gravel in the oblique hole of tunnel and peripheral terrace.
Embodiment two: certain emergent antiseepage treatment project
Project profile: the emergent protection in certain urban conservation area levee foundation soil occurs oozing and destroys seriously, and part dike section row seepage well has occurred water burst and gushed the sand phenomenon, and through exploration, levee foundation contains mud and floats that transmission coefficient has reached 6.95 * 10 in the boulder bed
-2～1.68 * 10
-1Cm/s belongs to the highly permeable layer, must carry out effective antiseepage and handle, and could guarantee the safety of urban conservation area.
Construction: the main purpose of this project seepage controlling curtain construction is to stop seepage in the levee foundation.At this purpose, the main construction method of taking is: adopt materials such as cement, clay, sulphate aluminium cement, breeze, water, forming the initial flow degree is the slurries of 160mm.The job practices that adopts be the sealing of uncork thixotroping slurry, from bottom to top, segmentation, clamp-on infiltration grouting, grouting pressure is 2MPa.
Construction effect: adopt single liquid grouting equipment system, with the slurries of above-mentioned degree of mobilization, inject the stratum uniformly, the mode of slurries to clamp-on, to fill, heap sand cobble inner pore cavity by Grouting Pipe.The transmission coefficient of engineering has reached less than 1 * 10
-5The requirement of cm/s.
Embodiment three: certain foundation ditch emergency leakage blocking treatment project
Project profile: this project is the power station foundation ditch, when excavation of foundation pit to behind river surface head 15m, 5m has appearred in first phase longitudinal cofferdam karst cave crack
3/ s all flooded foundation ditch in 4 hours.According to this emergency, in conjunction with the engineering geological conditions characteristics, adopt cement, water glass quick-coagulating high-strength slurries, the sealing of uncork thixotroping slurry, packer grouting from bottom to top, grouting pressure is 4MPa.
Construction effect: by 40 days duration, pour into 3000 tons of cement, behind 150 tons of the water glass, leak paths is by successful shutoff, and the foundation ditch disappearance of leaking obtains good engineering effort.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the manual just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. the controlled impervious leakage-stopping on Quaternary system highly permeable stratum is clamp-oned grouting sealing technology, it is characterized in that the grouting agent of the environmental protection and economy type that the highly permeable stratum is used; The slurry degree is 60～200mm; Grouting pressure is 0.5～5.0MPa; The job practices that adopts from bottom to top, the segmentation uncork ends that slurry, high pressure are controlled clamp-ons grouting, in order to form effective sealing curtain body or stifled body.
2. the controlled impervious leakage-stopping on Quaternary system highly permeable according to claim 1 stratum is clamp-oned grouting sealing technology, it is characterized in that described stratum is meant that transmission coefficient is greater than 1 ~ 10
-3The sandy gravel of cm/s, float loose highly permeable stratum that the footpath is thick such as cobble, artificial earth fill.
3. the controlled impervious leakage-stopping on Quaternary system highly permeable according to claim 1 stratum is clamp-oned grouting sealing technology, it is characterized in that described grouting agent can be that in cement, clay, mud, slag, flyash, water granulated slag, water glass, silty clay, aluminium sulfate, the triethanolamine one or more mix the back and form with water.
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| CN2011100739537A CN102174818A (en) | 2011-03-25 | 2011-03-25 | Controlled impermeable leaking stoppage grout-extruding water-stopping technology of strong water permeable stratum of quaternary system |
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| CN2011100739537A CN102174818A (en) | 2011-03-25 | 2011-03-25 | Controlled impermeable leaking stoppage grout-extruding water-stopping technology of strong water permeable stratum of quaternary system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418337A (en) * | 2011-10-17 | 2012-04-18 | 湖南宏禹水利水电岩土工程有限公司 | New grouting method |
| CN102444136A (en) * | 2011-09-28 | 2012-05-09 | 云南路桥股份有限公司 | Water prevention construction method for excavation of deep foundation pit in water-rich sand stone layer |
| CN102535472A (en) * | 2012-02-29 | 2012-07-04 | 中国水电顾问集团中南勘测设计研究院 | Pored-tube filling and high-pressure impacting extruding grouting method |
| CN103046567A (en) * | 2012-12-22 | 2013-04-17 | 山西四建集团有限公司 | Method for stopping leakage among profile-steel support piles by dry-mixed mortar gravity burying method |
| CN105064280A (en) * | 2015-07-16 | 2015-11-18 | 中国水利水电第十四工程局有限公司 | Tunnel underground river water burst blockage construction method |
| CN106150528A (en) * | 2015-03-25 | 2016-11-23 | 昆明百谦科技有限公司 | A kind of special slow release water-stop glue construction method |
-
2011
- 2011-03-25 CN CN2011100739537A patent/CN102174818A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444136A (en) * | 2011-09-28 | 2012-05-09 | 云南路桥股份有限公司 | Water prevention construction method for excavation of deep foundation pit in water-rich sand stone layer |
| CN102418337A (en) * | 2011-10-17 | 2012-04-18 | 湖南宏禹水利水电岩土工程有限公司 | New grouting method |
| CN102418337B (en) * | 2011-10-17 | 2013-10-02 | 湖南宏禹水利水电岩土工程有限公司 | New grouting method |
| CN102535472A (en) * | 2012-02-29 | 2012-07-04 | 中国水电顾问集团中南勘测设计研究院 | Pored-tube filling and high-pressure impacting extruding grouting method |
| CN102535472B (en) * | 2012-02-29 | 2014-06-11 | 中国水电顾问集团中南勘测设计研究院 | Pored-tube filling and high-pressure impacting extruding grouting method |
| CN103046567A (en) * | 2012-12-22 | 2013-04-17 | 山西四建集团有限公司 | Method for stopping leakage among profile-steel support piles by dry-mixed mortar gravity burying method |
| CN103046567B (en) * | 2012-12-22 | 2015-04-08 | 山西四建集团有限公司 | Method for stopping leakage among profile-steel support piles by dry-mixed mortar gravity burying method |
| CN106150528A (en) * | 2015-03-25 | 2016-11-23 | 昆明百谦科技有限公司 | A kind of special slow release water-stop glue construction method |
| CN105064280A (en) * | 2015-07-16 | 2015-11-18 | 中国水利水电第十四工程局有限公司 | Tunnel underground river water burst blockage construction method |
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Application publication date: 20110907 |