CN106381840B - Fracture plugging grouting method under a kind of high pressure moving water state - Google Patents
Fracture plugging grouting method under a kind of high pressure moving water state Download PDFInfo
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- CN106381840B CN106381840B CN201610783807.6A CN201610783807A CN106381840B CN 106381840 B CN106381840 B CN 106381840B CN 201610783807 A CN201610783807 A CN 201610783807A CN 106381840 B CN106381840 B CN 106381840B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
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- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
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Abstract
The present invention relates to fracture plugging grouting methods under hydraulic structure concrete glued crack recovery technique field more particularly to a kind of high pressure moving water state.The method of the invention includes the following steps：Handle crack, drilling, configuration slurries, grouting, end.The method of the invention takes a hole to be in the milk, the arrangement and method for construction of periphery hole decompression, changes the contact between crack and country rock and is sewn on and take the inaccessiable situation of conventional means, and slurries can smoothly enter into precipitation consolidation in contact seam, to make leakage crack be closed, the purpose of fracture plugging is realized；Cement base of the method for the invention using cement mortar, land plaster and silica flour mixing material as host agent starches material, slurries are in the contact seam being squeezed between concrete and country rock, because flowing velocity is relatively slow, the false set characteristic of slurries, so that slurries are after being squeezed into contact seam, seepage pressure cannot discharge it so that the plasmoid material energy rapid precipitation consolidates, and realizes the purpose of fracture plugging.
Description
Technical field
The present invention relates to hydraulic structure concrete glued crack recovery technique field more particularly to it is a kind of it is high press it is watery
Fracture plugging grouting method under state.
Background technology
Glued crack method is mainly used for having an impact or have the repairing of the distress in concrete of antiseepage requirement to structural integrity, profit
Cementing material is pressed into the crack of concrete with press device, an entirety is formed with concrete after cementing material hardening, from
And play the purpose for blocking and reinforcing.Common cementing material has the changes such as cement mortar, epoxy resin, methacrylate, polyurethane
Learn material.
Drilling pipe laying is usually taken in distress in concrete grouting or drilling is buried the mode of mouth and carried out, according to the thickness of concrete structure
Degree and the penetration of fracture, the method that drilling is usually taken arrange that the inclined hole intersected with crack is in the milk.When drilling, about apart from crack
150-350mm, along fractuer direction both sides cross borehole.Depending on pitch-row presses on-site actual situations, grouting is passed through with adjacent grout hole
Ensure that slurries can be crossed at crack for principle, general adjacent pitch of holes is advisable in depth and length direction at a distance of 200-300mm.
About 50 ° -70 ° of dip angle of hole, drilling can optionally adjust at a distance from gap, and drilling depth should pass through gap, Kong Yukong's
Distance can also be adjusted accordingly depending on slit width, and usual crack is wider, the slurries agent of injection can force feed obtain farther out, therefore, Kong Yukong
The distance between appropriate increase.
Glued crack materials'use cement mortar grouting encounter in crack have pressure infiltration when, usual water mixing glass, rapid hardening
Agent and coagulant are rapidly solidified so as to slurries, cause to be lost in prevent slurries from being washed away by seepage pressure, influence crack entoplasm
The density and crack closure effect of liquid filling；When glued crack is using chemical plasmoid material, by increasing curing agent additive amount, add
The grout curing effect of speed.
The power stations Yun Peng right bank spillway tunnel (and diversion tunnel) is under-water tuunel, in the case of normal pool level, Mass Near The Top of Underground Cavity position
In about 70m under water, lining thickness only 0.6m.After dam water storage, tunnel is influenced by country rock Unloading Effect and head pressure, tunnel
There is the larger percolating water phenomenon of range in construction joint, the cold seam of construction etc..Leakage water pressure is big, and localized borehole osmotic pressure reaches
0.7MPa is presented percolating water and directly communicates phenomenon with reservoir area head, and intractability is very big.Take part in building each side once organized tail work handle
Mechanism and construction manpower, by lasting processing more than a year, but treatment effect produces little effect.The problem of processing procedure and
Intractability mainly has the following aspects：
1, construction joint, the cold seam seepage pressure of construction are big, but injection rate of being in the milk is little, and after grouting, seam face drainage is still
In the presence for the treatment of effect unobvious；2, when breakthrough well cementing, once pressure reaches regulation grouting pressure, grout hole periphery hair
The Micro blazed-grating fine cracks of existing showed increased, cold seam of constructing also seep water；3, seepage point osmotic pressure is big, and grouting is taken slightly higher
In the grouting pressure of head, still cannot effective slip casting, have some holes even not midge substantially；4, only because of tunnel lining thickness
0.6m, grouting pressure is excessive, and more than 0.75MPa, new seepage point is continuously increased, to the construction in deep about 70m tunnels under water
There are security threats by personnel, once tunnel is breakdown, consequence does not survey imagination；5, lining cutting hole section once took anchor plate to reinforce closing
Method afterwards is in the milk, but steel plate surrounding still seeps water, and cannot form effective dead-end fracture.If program closing is oozed
Leak is successful, will cause to seriously affect lining concrete service life in distress in concrete there are pressure water, program envelope
Chink also only is makeshift.
Invention content
In view of the shortcomings of the prior art, fracture plugging grouting method under a kind of high pressure moving water state of present invention offer comprising
Following steps：
Step 1 handles crack：If the width in crack is less than 0.4mm, the dirt of fracture faces is removed using wire brush tool
Object is contaminated, is cleaned with organic solution and keeps its drying property；If the width in crack is more than 0.4mm, using drill rod or pneumatic pick along crack
Forming V-shape slot is dug, is first opened along crack when raggle, then widen to both sides, is removed with wire brush and compressed air after dig and is totally mixed
Solidifying soil clast, dust, are closed using epoxy resin mortar；
Step 2, drilling：If the width in crack is more than 0.4mm, inclined hole is set in the both sides in crack, drilling is intersected with crack
As the injected hole of glued crack, before glued crack, first the range for influencing crack-leakage is checked, in being with breakthrough
The heart, in crack both sides and both ends arrangement drilling, distance leakage central point outside cloth hole as unit of 0.4m, if the hole drills coagulation
After soil layer, find leakage, then one hole of cloth again outside 0.4m again, and so on do not leak in drill, determine and leak
Point periphery；
Step 3, configures slurries, and slurries take single liquid pulping way, Xian Jiashui to sequentially add land plaster and silica flour, stir
It can be used to be in the milk after mixing 10min；Slurries take mixing slurry material, and cement utilizes building gypsum plaster as based on cementitious material
" false set " and water retention characteristic take the form of extruding, the water in crack infiltration range will be caused to exclude, silica flour is for improving slurries
Set strength.
Step 4, grouting：It is in the milk from breakthrough periphery to leakage dot center, when grouting, the drilling on grout hole periphery
Decompression is opened, so that slurries are from breakthrough periphery to leakage central point flowing, is excluded between lining concrete and country rock in gap
Ponding simultaneously replaces slurries filling；
Step 5 terminates：In filling process, there is grout leaking in adjacent holes, and the hole to there is grout leaking blocks, and every
10min openings are once checked, overfall concentration is measured, and the hole overfall concentration for grout leaking such as occur is consistent with grout hole concentration, envelope
It is stifled the hole of grout leaking occur, and no longer open, all holes with grout hole grout leaking are blocked in the manner described above, continue to be in the milk,
After reaching injecting process finished criteria, terminate the grouting works of the grout hole, is transferred to next grout hole and is in the milk, the filling
Starch ending standard：After grouting pressure reaches the pressure of design, when continuous 30min grouting injection rate is 0L/min, terminate grouting；
If in filling process, adjacent holes do not occur grout leaking phenomenon, then are controlled by injecting process finished criteria, terminate grouting, is transferred to another
It is in the milk in one hole.
Overfall pipeline is equipped between the grout hole and grouting pump.
The Mortar mix proportion is water：Cement：Land plaster：Silica flour=100：100：10：5-8.
15-18% of the overall control of the land plaster and silica flour in cement consumption.
After slurries mixing described in step 3, slurries are finished in 4 hours.
Grouting pressure is divided into the initial pressure of grouting, the control pressure in filling process during being in the milk described in step 4
It is 0.7MPa to require the design pressure reached, the design pressure with injecting process finished criteria.
The initial pressure of grouting is adjusted by 50% control of the design pressure if grouting amount is less than live slurrying capacity
Whole grouting pressure is the design pressure, until reaching injecting process finished criteria.
Initial pressure grouting is controlled by the 50% of the design pressure, and grouting amount is very big in hole, and slurrying capacity cannot meet
When its grouting requires, then carry out controlled grouting will be filled with the slurries in stock tank by 5min, 10min time, has taken interval, limit
Stream, addition accelerator mode be in the milk, less than the design pressure time must not exceed grouting total time-consuming between 30%.
Compared with prior art, the beneficial effects of the present invention are：
1, the method for the invention takes the arrangement and method for construction of " hole is in the milk, periphery hole decompression ", changes crack and country rock
Between contact be sewn on and take the inaccessiable situation of conventional means, slurries can smoothly enter into precipitation consolidation in contact seam, to make
Leakage crack is closed, and the purpose of fracture plugging is realized.
2, cement base of the method for the invention using cement mortar, land plaster and silica flour mixing material as host agent starches material,
Slurries are in the contact seam being squeezed between concrete and country rock, because flowing velocity is relatively slow, " false set " characteristic of slurries so that slurry
After being squeezed into contact seam, seepage pressure cannot discharge it liquid so that the plasmoid material energy rapid precipitation consolidates, and realizes
The purpose of fracture plugging.
Specific implementation mode
Embodiment
Fracture plugging grouting method under a kind of high pressure moving water state of present invention offer comprising following steps：
Step 1 handles crack：If the width in crack is less than 0.4mm, the dirt of fracture faces is removed using wire brush tool
Object is contaminated, is cleaned with organic solution and keeps its drying property；If the width in crack is more than 0.4mm, using drill rod or pneumatic pick along crack
Forming V-shape slot is dug, is first opened along crack when raggle, then widen to both sides, is removed with wire brush and compressed air after dig and is totally mixed
Solidifying soil clast, dust, are closed using epoxy resin mortar；
Step 2, drilling：If the width in crack is more than 0.4mm, inclined hole is set in the both sides in crack, drilling is intersected with crack
As the injected hole of glued crack, before glued crack, first the range for influencing crack-leakage is checked, in being with breakthrough
The heart, in crack both sides and both ends arrangement drilling, distance leakage central point outside cloth hole as unit of 0.4m, if the hole drills coagulation
After soil layer, find leakage, then one hole of cloth again outside 0.4m again, and so on do not leak in drill, determine and leak
Point periphery；
Step 3, configures slurries, and slurries take single liquid pulping way, Xian Jiashui to sequentially add land plaster and silica flour, stir
It can be used to be in the milk after mixing 10min；
Step 4, grouting：It is in the milk from breakthrough periphery to leakage dot center, when grouting, the drilling on grout hole periphery
Decompression is opened, so that slurries are from breakthrough periphery to leakage central point flowing, is excluded between lining concrete and country rock in gap
Ponding simultaneously replaces slurries filling；
Step 5 terminates：In filling process, there is grout leaking in adjacent holes, and the hole to there is grout leaking blocks, and every
10min openings are once checked, overfall concentration is measured, and the hole overfall concentration for grout leaking such as occur is consistent with grout hole concentration, envelope
It is stifled the hole of grout leaking occur, and no longer open, all holes with grout hole grout leaking are blocked in the manner described above, continue to be in the milk,
After reaching injecting process finished criteria, terminate the grouting works of the grout hole, is transferred to next grout hole and is in the milk, the filling
Starch ending standard：After grouting pressure reaches the pressure of design, when continuous 30min grouting injection rate is 0L/min, terminate grouting；
If in filling process, adjacent holes do not occur grout leaking phenomenon, then are controlled by injecting process finished criteria, terminate grouting, is transferred to another
It is in the milk in one hole.
Overfall pipeline is equipped between the grout hole and grouting pump.
The Mortar mix proportion is water：Cement：Land plaster：Silica flour=100：100：10：5-8.
15-18% of the overall control of the land plaster and silica flour in cement consumption.
After slurries mixing described in step 3, slurries are finished in 4 hours.
Grouting pressure is divided into the initial pressure of grouting in filling process described in step 4, the control pressure in filling process and
It is 0.7MPa that injecting process finished criteria, which requires the design pressure reached, the design pressure,.
The initial pressure of grouting is adjusted by 50% control of the design pressure if grouting amount is less than live slurrying capacity
Whole grouting pressure is the design pressure, until reaching injecting process finished criteria.
Initial pressure grouting is controlled by the 50% of the design pressure, and grouting amount is very big in hole, and slurrying capacity cannot meet
It when its grouting requires, then will be filled with the slurries in stock tank by 5min, 10min time, carried out controlled grouting, taken interval, limit
Stream, addition accelerator mode be in the milk, less than the design pressure time must not exceed grouting total time-consuming between 30%.
The method of the invention application example：
The power stations Yun Peng right bank flood discharge (water conservancy diversion) hole is to have pressure hole, and bulkhead gate well is arranged in tunnel import, and import bottom plate is high
823.0 meters of journey, 904.0 meters of operating platform elevation are connect with long 80 meters of access bridge with highway；Cleaning door setting goes out in tunnel
Mouthful, igfet gate is 6.5 × 8 meters.It is 821.989 meters to export floor elevation.Right bank spillway tunnel overall length is 711.00 meters.
Right bank spillway tunnel (and diversion tunnel) is under-water tuunel, in the case of normal pool level, Mass Near The Top of Underground Cavity be located at it is underwater about
70m, lining thickness only 0.6m.After dam water storage, tunnel is influenced by country rock Unloading Effect and head pressure, construction joint of tunnel,
There is the larger percolating water phenomenon of range in cold seam etc. of constructing, and leakage water pressure is big, and localized borehole osmotic pressure reaches 0.7MPa.
When this project is in the milk, hole top water level has been stored to design water level, and after the completion of grouting, crack is all closed, and slurries knot in crack
Stone is full, and the concrete of crack periphery soaks state in drying regime by original, is checked and accepted by standard of actual effect.
Solves leak stopping problem using the method for the invention.Now transfer owner's operational management for many years, engineering safety and matter
Measure controlled, plugging effect is successful, and new approach is provided for similar engineering defect processing.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is every to belong to this hair
Row of the obvious changes or variations that bright technical solution is extended out still in protection scope of the present invention.
Claims (8)
1. fracture plugging grouting method under a kind of high pressure moving water state comprising following steps：
Step 1 handles crack：If the width in crack is less than 0.4mm, the pollutant of fracture faces is removed using wire brush tool,
It is cleaned with organic solution and keeps its drying property；If the width in crack is more than 0.4mm, dug into V along crack using drill rod or pneumatic pick
Shape slot is first opened when raggle along crack, then is widened to both sides, broken with wire brush and the clean concrete of compressed air removing after dig
Bits, dust, are closed using epoxy resin mortar；
Step 2, drilling：If the width in crack is more than 0.4mm, inclined hole is set in the both sides in crack, drilling intersects conduct with crack
The injected hole of glued crack before glued crack, first checks the range for influencing crack-leakage, centered on breakthrough,
Crack both sides and both ends arrangement drilling, distance leakage central point outside cloth hole as unit of 0.4m, if the hole drills concrete layer
Afterwards, find leakage, then one hole of cloth again outside 0.4m again, and so on do not leaked until in drilling, determine outside breakthrough
It encloses；
Step 3 configures slurries：Slurries take single liquid pulping way, Xian Jiashui to sequentially add land plaster and silica flour, stirring
It can be used to be in the milk after 10min；
Step 4, grouting：It is in the milk from breakthrough periphery to leakage dot center, when grouting, the drilling on grout hole periphery is opened
Decompression excludes the ponding in gap between lining concrete and country rock so that slurries are from breakthrough periphery to leakage central point flowing
And replace slurries filling；
Step 5 terminates：In filling process, there is grout leaking in adjacent holes, and the hole to there is grout leaking blocks, and every 10min
Opening is once checked, overfall concentration is measured, and the hole overfall concentration for grout leaking such as occur is consistent with grout hole concentration, blocks and occurs
The hole of grout leaking, and no longer open, all holes with grout hole grout leaking are blocked in the manner described above, continue to be in the milk, Zhi Daoda
To after injecting process finished criteria, terminate the grouting works of the grout hole, be transferred to next grout hole and be in the milk, the grouting terminates
Standard：After grouting pressure reaches design pressure, when continuous 30min grouting injection rate is 0L/min, terminate grouting；If grouting
In the process, adjacent holes do not occur grout leaking phenomenon, then are controlled by injecting process finished criteria, and grouting is terminated, and are transferred to another hole and carry out
Grouting.
2. according to claim 1 the method, which is characterized in that be equipped with overfall pipeline between the grout hole and grouting pump.
3. according to claim 1 the method, which is characterized in that the Mortar mix proportion is water：Cement：Land plaster：Silica flour=
100：100：10：5-8.
4. according to claim 1 the method, which is characterized in that the overall control of the land plaster and silica flour is in cement consumption
15-18%.
5. according to claim 1 the method, which is characterized in that after slurries mixing described in step 3, slurries are used in 4 hours
It is complete.
6. according to claim 1 the method, which is characterized in that grouting pressure is divided into grouting during being in the milk described in step 4
Initial pressure, control pressure and injecting process finished criteria in filling process require the design pressure reached, the design pressure
For 0.7MPa.
7. according to claim 6 the method, which is characterized in that the initial pressure of grouting is controlled by the 50% of the design pressure
System, if grouting amount is less than live slurrying capacity, adjustment grouting pressure is the design pressure, terminates mark until reaching grouting
It is accurate.
8. according to claim 6 the method, which is characterized in that initial pressure grouting is controlled by the 50% of the design pressure,
Grouting amount is very big in hole, and slurrying capacity cannot meet its grouting when requiring, then will be with the slurry in stock tank by 5min, 10min time
Liquid has filled, and carries out controlled grouting, takes the mode of interval, current limliting, addition accelerator to be in the milk, less than the design pressure
Time must not exceed 30% between grouting total time-consuming.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107012832A (en) * | 2017-04-06 | 2017-08-04 | 长江勘测规划设计研究有限责任公司 | Plugging structure and method under a kind of CFRD percolating water |
| CN108316241B (en) * | 2018-04-13 | 2023-08-04 | 上海公路桥梁（集团）有限公司 | Water retaining wall concrete wall structure and severe leakage crack plugging method thereof |
| CN108755334A (en) * | 2018-06-11 | 2018-11-06 | 中水电第十工程局（郑州）有限公司 | A kind of method that concrete road planar defect is quickly repaired |
| CN109516726A (en) * | 2018-11-21 | 2019-03-26 | 中国电建集团成都勘测设计研究院有限公司 | Sealing off and covering anchorage material suitable for flow turbulence area anchor cable |
| CN110658332B (en) * | 2019-09-30 | 2020-06-30 | 中国水利水电科学研究院 | Concrete lining pre-pressure measurement test device and test method thereof |
| CN111520100B (en) * | 2020-04-30 | 2021-01-12 | 中国水电基础局有限公司 | Drilling method adopting common weighted mud under high-head flowing water condition |
| CN111535773B (en) * | 2020-04-30 | 2021-01-12 | 中国水电基础局有限公司 | Drilling method adopting fiber type weighted mud under high-head flowing water condition |
| CN111848067B (en) * | 2020-07-30 | 2022-02-01 | 石家庄铁道大学 | Grouting material for large bridge support and preparation method thereof |
| CN112281927A (en) * | 2020-11-25 | 2021-01-29 | 四川童燊防水工程有限公司 | Construction method for treating leakage of independent foundation of frame column |
| CN114293602A (en) * | 2021-11-08 | 2022-04-08 | 浙江绿城房屋服务系统有限公司 | Basement structure bottom plate leakage plugging repair method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1066698A (en) * | 1992-05-30 | 1992-12-02 | 杨晓东 | Mould bag slip casting (material) dynamic water plugging method and apparatus in the macrovoid |
| CN100591866C (en) * | 2008-01-23 | 2010-02-24 | 湖南省建筑工程集团总公司 | Drifting sand layer and gravel stratum water-moving double-liquid high pressure slip-casting water-blocking construction method |
| DE102010004247A1 (en) * | 2009-01-10 | 2010-07-15 | Sonntag-Rößner, Petra | Method for sealing cracks or joints in concrete components, involves preparing sub-surface of concrete component in area of crack or joint, where inclined hole is provided in concrete component leading from component surface to crack |
| CN101654907A (en) * | 2009-09-11 | 2010-02-24 | 中国水利水电第九工程局有限公司 | High-flow high-speed jet plugging grouting technique under high-pressure water head of hydropower station |
| CN105442862B (en) * | 2015-11-19 | 2018-02-27 | 江苏鼎达建筑新技术有限公司 | A kind of distress in concrete infiltration water collision reinforcement and repair method |
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