CN106381840A - Leaking stoppage grouting method for cracks under high pressure flowing water state - Google Patents
Leaking stoppage grouting method for cracks under high pressure flowing water state Download PDFInfo
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- CN106381840A CN106381840A CN201610783807.6A CN201610783807A CN106381840A CN 106381840 A CN106381840 A CN 106381840A CN 201610783807 A CN201610783807 A CN 201610783807A CN 106381840 A CN106381840 A CN 106381840A
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- grouting
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of grouting repairing of concrete cracks of a hydraulic building, in particular to a leaking stoppage grouting method for cracks under a high pressure flowing water state. The method comprises the following steps: processing the cracks, drilling, configuring grout, grouting and ending. The method according to the invention adopts a construction method of grouting one hole and depressurizing peripheral holes, the condition that contact cracks between the cracks and surrounding rocks cannot be entered by adopting a conventional means is changed, and grout can enter into the contact cracks to be settled and solidified smoothly, such that the leakage cracks are closed and the aim of leaking stoppage of the cracks is realized; the method according to the invention adopts a cement-base slurry material adopting taking a mixed material of cement slurry, gypsum powder and silicon powder as a main agent, when the grout enters into the contact cracks between the concrete and the surrounding rocks, due to the characteristics of slow flow speed and fake solidification of the grout, water seepage pressure cannot discharge the grout after the grout enters into the contact cracks, such that such type of slurry material can be quickly settled and solidified, and the aim of leakage stoppage of the cracks is realized.
Description
Technical field
The present invention relates to hydraulic structure concrete glued crack recovery technique field, more particularly, to a kind of height presses watery
Fracture plugging grouting method under state.
Background technology
Glued crack method is mainly used in structural integrity being had an impact or having the repairing of the distress in concrete of antiseepage requirement, profit
With press device, cementing material is pressed in the crack of concrete, after cementing material hardening, forms an entirety with concrete, from
And play the purpose that closure is reinforced.Conventional cementing material has cement mortar, epoxy resin, methacrylate, polyurethane etc. to change
Learn material.
Distress in concrete grouting is usually taken boring pipe laying or boring is buried the mode of mouth and carried out, according to the thickness of xoncrete structure
Degree and the penetration of fracture, the method that boring is usually taken arranges that the inclined hole being intersected with crack is in the milk.During boring, apart from crack about
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 serosity can cross for principle at crack, typically adjacent pitch of holes is advisable at a distance of 200-300mm in depth and length direction.
About 50 ° -70 ° of dip angle of hole, boring optionally can adjust with the distance in gap, and drilling depth should pass through gap, Kong Yukong's
Distance also can adjust accordingly depending on seam width, and usual crack is wider, and the serosity agent of injection can obtain farther out by force feed, therefore, Kong Yukong
The distance between suitably increase.
Glued crack materials'use cement mortar grouting run into have in crack pressure infiltration when, usual water mixing glass, rapid hardening
Agent and coagulant, so that serosity is rapidly solidified, cause to prevent serosity from being washed away by seepage pressure to run off, impact crack entoplasm
The density of liquid filling and crack closure effect；When glued crack is using chemical plasmoid material, by increasing firming agent addition, plus
The grout curing effect of speed.
Yun Peng power station 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-retention, tunnel is affected by country rock Unloading Effect and head pressure, tunnel
The larger percolating water phenomenon of scope in construction joint, the cold seam of construction etc..Seepage water pressure is big, and localized borehole osmotic pressure reaches
0.7Mpa, assumes percolating water and directly communicates phenomenon with reservoir area head, intractability is very big.The each side that takes part in building once organized tail work datatron
Structure and construction manpower, through lasting process more than a year, but treatment effect produces little effect.Problem present in processing procedure and place
Reason difficulty mainly has the following aspects：
1st, construction joint, construction cold seam seepage pressure are big, but grouting injection rate is less, and after grouting, seam face drainage is still
Exist, treatment effect is inconspicuous；2nd, during breakthrough well cementing, once pressure reaches regulation grouting pressure, grout hole periphery is sent out
The Micro blazed-grating fine cracks of existing showed increased, also infiltration in the cold seam of construction；3rd, seepage point osmotic pressure is big, and grouting is taken slightly higher
In the grouting pressure of head, still can not effectively slip casting, have some holes even not midge substantially；4th, because of tunnel lining thickness only
0.6m, grouting pressure is excessive, and more than 0.75Mpa, new seepage point is continuously increased, to the construction in deep about 70m tunnel under water
There is security threat in personnel, once tunnel is breakdown, consequence does not survey imagination；5th, lining cutting hole section once took anchor plate to reinforce closing
Method afterwards is in the milk, but steel plate surrounding infiltration still it is impossible to form effective dead-end fracture.If program closing is oozed
Leak is successful, will result in distress in concrete and there is press water, has a strong impact on lining concrete service life, and the program is sealed
Chink also is only makeshift.
Content of the invention
Not enough for prior art, the present invention provides fracture plugging grouting method under a kind of high pressure moving water state, and it includes
Following steps：
Step one, processes crack：If the width in crack is less than 0.4mm, remove the dirt of fracture faces using wire brush instrument
Dye thing, cleans and keeps its drying property with organic solution；If the width in crack is more than 0.4mm, using drill rod or pneumatic pick along crack
Chisel forming V-shape groove, first opens along crack during raggle, then widens to both sides, is removed with wire brush and compressed air and totally mix after having dug
Solidifying soil chip, dust, are closed using epoxy resin mortar；
Step 2, boring：If the width in crack, more than 0.4mm, arranges inclined hole in the both sides in crack, boring is intersected with crack
As the injected hole of glued crack, before glued crack, first the scope of impact crack-leakage is checked, in breakthrough being
The heart, crack both sides and two ends arrangement boring, apart from seepage central point in units of 0.4m outside cloth hole, if coagulation worn by this hole drill
After soil layer, find seepage, then outside 0.4m one hole of cloth more again, the like occur without seepage in boring, determine seepage
Point periphery；
Step 3, configures serosity, and serosity is taken single liquid pulping way, first added water, sequentially adds Gypsum Fibrosum powder and silica flour, stir
Can be used for after mixing 10min being in the milk；Serosity takes mixing slurry material, cement as based on Binder Materials, using building gypsum plaster
" false set " and water retention characteristic take the form of extruding, will result in the water exclusion in the range of the infiltration of crack, and silica flour is used for improving serosity
Set strength.
Step 4, grouting：It is in the milk from breakthrough periphery to seepage dot center, during grouting, the boring of grout hole periphery
Open decompression, so that serosity is from breakthrough periphery to the flowing of seepage central point, in space between exclusion lining concrete and country rock
Hydrops simultaneously replace serosity filling；
Step 5, terminates：In filling process, grout leaking in adjacent holes, and hole grout leaking is blocked, and every
10min opens and is once checked, measures overfall concentration, and hole overfall concentration grout leaking such as is consistent with grout hole concentration, envelope
The stifled hole that grout leaking occurs, and no longer open, closure all holes with grout hole grout leaking in the manner described above, proceed to be in the milk,
After reaching injecting process finished criteria, terminate the grouting works of this grout hole, proceed to next grout hole and be in the milk, described filling
Slurry 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, grout leaking phenomenon in adjacent holes, then be controlled by injecting process finished criteria, terminate grouting, proceed to another
It is in the milk in one hole.
It is provided with overfall pipeline between described grout hole and grouting pump.
Described Mortar mix proportion is water：Cement：Gypsum Fibrosum powder：Silica flour=100：100：10：5-8.
The overall control of described Gypsum Fibrosum powder and silica flour is in the 15-18% of cement consumption.
After serosity mixing described in step 3, serosity was finished in 4 hours.
During being in the milk described in step 4, grouting pressure is divided into the initial pressure of grouting, the control pressure in filling process
The design pressure reaching with injecting process finished criteria requirement, described design pressure is 0.7mpa.
The initial pressure of grouting presses 50% control of described design pressure, if grouting amount is less than live slurrying capacity, adjusts
Whole grouting pressure is described design pressure, until reaching injecting process finished criteria.
Control by the 50% of described design pressure by initial pressure grouting, in the hole grouting amount is very big, and slurrying capacity can not expire
When its grouting of foot requires, then by 5min, 10min time, the serosity in groove with slurry is filled and be controlled being in the milk, taken interval, limit
Stream, the mode of interpolation accelerator are in the milk, and must not exceed 30% between grouting total time-consuming less than the time of described design pressure.
Compared with prior art, the beneficial effects of the present invention is：
1st, the method for the invention takes the arrangement and method for construction of " a hole grouting, periphery hole reduces pressure ", changes crack and country rock
Between contact be sewn on and take the inaccessiable situation of conventional meanses, serosity can smoothly enter precipitation consolidation in contact seam, thus just
Seepage crack has obtained closing it is achieved that the purpose of fracture plugging.
2nd, the method for the invention adopts cement mortar, Gypsum Fibrosum powder and silica flour mixing material as the cement based slurry material of host,
, in the contact seam being squeezed between concrete and country rock, because flowing velocity is more slow, " false set " characteristic of serosity is so that starch for serosity
Liquid be squeezed into contact seam in after, seepage pressure can not discharge it so that this plasmoid material energy rapid precipitation consolidate it is achieved that
The purpose of fracture plugging.
Specific embodiment
Embodiment
The present invention provides fracture plugging grouting method under a kind of high pressure moving water state, and it comprises the steps：
Step one, processes crack：If the width in crack is less than 0.4mm, remove the dirt of fracture faces using wire brush instrument
Dye thing, cleans and keeps its drying property with organic solution；If the width in crack is more than 0.4mm, using drill rod or pneumatic pick along crack
Chisel forming V-shape groove, first opens along crack during raggle, then widens to both sides, is removed with wire brush and compressed air and totally mix after having dug
Solidifying soil chip, dust, are closed using epoxy resin mortar；
Step 2, boring：If the width in crack, more than 0.4mm, arranges inclined hole in the both sides in crack, boring is intersected with crack
As the injected hole of glued crack, before glued crack, first the scope of impact crack-leakage is checked, in breakthrough being
The heart, crack both sides and two ends arrangement boring, apart from seepage central point in units of 0.4m outside cloth hole, if coagulation worn by this hole drill
After soil layer, find seepage, then outside 0.4m one hole of cloth more again, the like occur without seepage in boring, determine seepage
Point periphery；
Step 3, configures serosity, and serosity is taken single liquid pulping way, first added water, sequentially adds Gypsum Fibrosum powder and silica flour, stir
Can be used for after mixing 10min being in the milk；
Step 4, grouting：It is in the milk from breakthrough periphery to seepage dot center, during grouting, the boring of grout hole periphery
Open decompression, so that serosity is from breakthrough periphery to the flowing of seepage central point, in space between exclusion lining concrete and country rock
Hydrops simultaneously replace serosity filling；
Step 5, terminates：In filling process, grout leaking in adjacent holes, and hole grout leaking is blocked, and every
10min opens and is once checked, measures overfall concentration, and hole overfall concentration grout leaking such as is consistent with grout hole concentration, envelope
The stifled hole that grout leaking occurs, and no longer open, closure all holes with grout hole grout leaking in the manner described above, proceed to be in the milk,
After reaching injecting process finished criteria, terminate the grouting works of this grout hole, proceed to next grout hole and be in the milk, described filling
Slurry 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, grout leaking phenomenon in adjacent holes, then be controlled by injecting process finished criteria, terminate grouting, proceed to another
It is in the milk in one hole.
It is provided with overfall pipeline between described grout hole and grouting pump.
Described Mortar mix proportion is water：Cement：Gypsum Fibrosum powder：Silica flour=100：100：10：5-8.
The overall control of described Gypsum Fibrosum powder and silica flour is in the 15-18% of cement consumption.
After serosity mixing described in step 3, serosity was finished in 4 hours.
In filling process described in step 4, grouting pressure is divided into the initial pressure of grouting, the control pressure in filling process and
The design pressure that injecting process finished criteria requirement reaches, described design pressure is 0.7mpa.
The initial pressure of grouting presses 50% control of described design pressure, if grouting amount is less than live slurrying capacity, adjusts
Whole grouting pressure is described design pressure, until reaching injecting process finished criteria.
By 50% control of described design pressure, in the hole grouting amount is very big, and slurrying capacity can not meet for initial pressure grouting
When its grouting requires, then the serosity in groove with slurry has been filled by 5min, 10min time of pressing, and is controlled being in the milk, and takes interval, limit
Stream, the mode of interpolation accelerator are in the milk, and must not exceed 30% between grouting total time-consuming less than the time of described design pressure.
The method of the invention application example：
Yun Peng power station right bank flood discharge (water conservancy diversion) hole is to have pressure hole, and tunnel import arranges bulkhead gate well, and import base plate is high
823.0 meters of journey, 904.0 meters of operating platform elevation, it is connected with highway with long 80 meters of access bridge；Cleaning door is arranged on tunnel and goes out
Mouthful, igfet gate is 6.5 × 8 meters.Outlet floor elevation is 821.989 meters.Right bank spillway tunnel overall length is 711.00 meters.
Right bank spillway tunnel (and diversion tunnel) is under-water tuunel, and in the case of normal pool level, Mass Near The Top of Underground Cavity is located under water about
70m, lining thickness only 0.6m.After dam water-retention, tunnel is affected by country rock Unloading Effect and head pressure, construction joint of tunnel,
The larger percolating water phenomenon of scope in cold seam of construction etc., and seepage water pressure is big, and localized borehole osmotic pressure reaches 0.7Mpa.This
During problem grouting, hole top water level has stored to design water level, and after the completion of grouting, crack is all closed, and serosity calculus in crack
Full, the concrete of crack periphery is in drying regime by original state of soaking, and is checked and accepted with actual effect for standard.
A leak stopping difficult problem is solved using the method for the invention.Now transfer owner's operational management for many years, engineering safety and matter
Amount is controlled, and plugging effect is successful, is that similar engineering defect processing provides new approach.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not right
The restriction of embodiments of the present invention, for those of ordinary skill in the field, also may be used on the basis of the above description
To make other changes in different forms, all of embodiment cannot be exhaustive here, every belong to this
Obvious change that bright technical scheme is extended out or change the row still in protection scope of the present invention.
Claims (8)
1. fracture plugging grouting method under a kind of high pressure moving water state, it comprises the steps：
Step one, processes crack：If the width in crack is less than 0.4mm, remove the pollutant of fracture faces using wire brush instrument,
Clean and keep its drying property with organic solution；If the width in crack is more than 0.4mm, V is dug into along crack using drill rod or pneumatic pick
Shape groove, first opens along crack during raggle, then widens to both sides, uses wire brush and the compressed air clean concrete of removing broken after having dug
Bits, dust, are closed using epoxy resin mortar；
Step 2, boring：If the width in crack, more than 0.4mm, arranges inclined hole in the both sides in crack, boring intersects conduct with crack
The injected hole of glued crack, before glued crack, first checks to the scope of impact crack-leakage, centered on breakthrough,
Crack both sides and two ends arrangement boring, apart from seepage central point in units of 0.4m outside cloth hole, if concrete layer worn by this hole drill
Afterwards, find seepage, then outside 0.4m one hole of cloth more again, the like occur without seepage in boring, determine outside breakthrough
Enclose；
Step 3, configures serosity：Serosity takes single liquid pulping way, first adds water, and sequentially adds Gypsum Fibrosum powder and silica flour, stirring
Can be used for after 10min being in the milk；
Step 4, grouting：It is in the milk from breakthrough periphery to seepage dot center, during grouting, the boring of grout hole periphery is opened
Decompression, so that serosity is from breakthrough periphery to the flowing of seepage central point, the hydrops in space between exclusion lining concrete and country rock
And replace serosity filling；
Step 5, terminates：In filling process, grout leaking in adjacent holes, and hole grout leaking is blocked, and every 10min
Open and once checked, measure overfall concentration, hole overfall concentration grout leaking such as is consistent with grout hole concentration, closure occurs
The hole of grout leaking, and no longer open, closure all holes with grout hole grout leaking in the manner described above, proceed to be in the milk, Zhi Daoda
To after injecting process finished criteria, terminate the grouting works of this grout hole, proceed to next grout hole and be in the milk, described grouting terminates
Standard：After grouting pressure reaches design pressure, when continuous 30min grouting injection rate is 0L/min, terminate grouting；If grouting
During, grout leaking phenomenon in adjacent holes, then be controlled by injecting process finished criteria, terminate grouting, proceed to another hole and carry out
Grouting.
2. according to claim 1 methods described it is characterised in that being provided with overfall pipeline between described grout hole and grouting pump.
3. according to claim 1 methods described it is characterised in that described Mortar mix proportion is water：Cement：Gypsum Fibrosum powder：Silica flour=
100：100：10：5-8.
4. according to claim 1 methods described it is characterised in that the overall control of described Gypsum Fibrosum powder and silica flour is in cement consumption
15-18%.
5. according to claim 1 methods described it is characterised in that after serosity mixing described in step 3, serosity was used in 4 hours
Complete.
6. according to claim 1 methods described it is characterised in that described in step 4 be in the milk during grouting pressure be divided into grouting
Initial pressure, the control pressure in filling process and the injecting process finished criteria design pressure that reaches of requirement, described design pressure
For 0.7mpa.
7. according to claim 6 methods described it is characterised in that the initial pressure of grouting presses 50% control of described design pressure
System, if grouting amount is less than live slurrying capacity, adjustment grouting pressure is described design pressure, terminates mark until reaching grouting
Accurate.
8. according to claim 6 methods described it is characterised in that initial pressure grouting controls by the 50% of described design pressure,
In the hole grouting amount is very big, and slurrying capacity can not meet its grouting when requiring, then 5min, 10min time of pressing is by the slurry in groove with slurry
Liquid has filled, and is controlled being in the milk, and takes interval, current limliting, the mode of interpolation accelerator to be in the milk, less than described design pressure
Time must not exceed 30% between grouting total time-consuming.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108316241A (en) * | 2018-04-13 | 2018-07-24 | 上海公路桥梁（集团）有限公司 | Blocking method is stitched in waterwall concrete wall structure and its serious leakage water crack |
| 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 |
| CN110658332A (en) * | 2019-09-30 | 2020-01-07 | 中国水利水电科学研究院 | Concrete lining pre-pressure measurement test device and test method thereof |
| CN111520100A (en) * | 2020-04-30 | 2020-08-11 | 中国水电基础局有限公司 | Drilling method adopting common weighted mud under high-head flowing water condition |
| CN111535773A (en) * | 2020-04-30 | 2020-08-14 | 中国水电基础局有限公司 | Drilling method adopting fiber type weighted mud under high-head flowing water condition |
| CN111848067A (en) * | 2020-07-30 | 2020-10-30 | 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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| 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 |
| CN108316241A (en) * | 2018-04-13 | 2018-07-24 | 上海公路桥梁（集团）有限公司 | Blocking method is stitched in waterwall concrete wall structure and its serious leakage water crack |
| 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 |
| CN110658332A (en) * | 2019-09-30 | 2020-01-07 | 中国水利水电科学研究院 | Concrete lining pre-pressure measurement test device and test method thereof |
| CN111520100A (en) * | 2020-04-30 | 2020-08-11 | 中国水电基础局有限公司 | Drilling method adopting common weighted mud under high-head flowing water condition |
| CN111535773A (en) * | 2020-04-30 | 2020-08-14 | 中国水电基础局有限公司 | Drilling method adopting fiber type weighted mud under high-head flowing water condition |
| CN111848067A (en) * | 2020-07-30 | 2020-10-30 | 石家庄铁道大学 | Grouting material for large bridge support and preparation method thereof |
| 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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