CN107130583A - Inclined hole cement grout construction method - Google Patents
Inclined hole cement grout construction method Download PDFInfo
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- CN107130583A CN107130583A CN201610995192.3A CN201610995192A CN107130583A CN 107130583 A CN107130583 A CN 107130583A CN 201610995192 A CN201610995192 A CN 201610995192A CN 107130583 A CN107130583 A CN 107130583A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of inclined hole cement grout construction method, including（1）Determine hole position,（2）Drilling and grouting equipment be in place,（3）Drilling,（4）Installation plasma resistance plug,（5）Hole flushing and packer permeability test,（6）River Bank Stability,（7）Grouting,（8）The steps such as sealing of hole；The advantage of the invention is that：Solving upright opening, cleaning bottom of hole, Grouting Cement consumption are big repeatedly during pore-creating in carbon mud layer, the problems such as grout compartment can not close slurry.Constructed using the technology, carbon mud layer can be bypassed, improved pore-creating speed, under the grout compartment limiting pressure, reduce a large amount of cement consumptions, reach and close slurry condition, meet construction quality requirement.
Description
Technical field
The present invention relates to a kind of cement grout construction method, specifically a kind of inclined hole cement grout construction method, category
In cement grout construction method field.
Background technology
Basement rock grouting has a variety of methods, is divided into bore hole-top-enclosed grouting method and segmentation obstruction grouting method according to the position of jam.
Two roads ditch reservoir stratum are carbon mud layer, are moved towards for dam foundation carbon mud layer, tendency reduces, raising construction matter bad to the slope of impermeable stratum
Amount and progress..
The content of the invention
In order to solve the above problems, the present invention devises a kind of inclined hole cement grout construction method, solves upright opening and exists
Cleaning bottom of hole, Grouting Cement consumption are big repeatedly during pore-creating in carbon mud layer, the problems such as grout compartment can not close slurry.Applied using the technology
Work, can bypass carbon mud layer, improve pore-creating speed, under the grout compartment limiting pressure, reduce a large amount of cement consumptions, reach and close slurry
Condition, meets construction quality requirement.
The technical scheme is that：
Inclined hole cement grout construction method, comprises the following steps：
（1）Determine hole position：The position of grout hole is accurately marked according to design requirement, and carries out repetition measurement；
（2）Drilling is in place with grouting equipment：After grout hole demarcation, mobile drill to bore position is adjusted by design requirement and drilled
Angle and fixed rig, complete rig in place；Grouting equipment should be installed nearby, and grouting pipeline is unsuitable long, to prevent the pressure loss；
（3）Drilling：With drilling tool alignment institute target plane hole position, with the drill bit perforate for meeting design requirement and drill；Boring procedure
In should select suitable boring pressure, rig rotating speed and coolant rate, and note situation in hole, it is to avoid bit freezing, burying, the burning of bits
Etc. accident；
（4）Plasma resistance plug is installed：During using grouting method from top to bottom, packer is not lived in predetermined position plug, its method adjusted
It is suitably to move up or move down, until finding the position that can be blocked；The length of grout compartment is increased if when moving up, works as grout compartment
When length is more than 10m, it should adopt remedial measures；The method remedied is usually that inspection hole is arranged by it, is sent out by inspection hole
Its existing influence degree, while supplementary irrigation can be carried out；
（5）Hole flushing and packer permeability test：After the completion of bore flushing, reply grout compartment is rinsed with press water；Flushing pressure can be adopted
With 80% grouting pressure, when pressure is more than 1MPa, using lMPa；Bore flushing terminates to the peace and quiet rear 10min of backwater；Hole flushing is
In order to avoid drilling cuttings blocks the crack on hole wall, water is returned in aperture during hole flushing will reach that water sand removal is net；Packer permeability test purpose is to check
Infiltration situation before the filling of stratum；
（6）River Bank Stability：Preparation meets the design grouting slurries to be shown；
Cement grout typically uses striaght cement slurries, and the mixing time of striaght cement slurries during using normal agitation machine, should be no less than
3min；During using homogenizer, no less than 30s；Slurries should sieve before use, make the time being finished to the utmost by oneself less than 4h；
Under special geologic condition or when having particular/special requirement, as needed, proved by live grouting test, it is possible to use following classes
Slurries：Thin cement grout：Mean dry grinding cement grout, damp milled microcements slurries and superfine cement slurries；Stable slurry：Mean mixed with
A small amount of stabilizer, syneresis rate is not more than 5% cement grout；
（7）Grouting：Grouting construction is implemented in strict accordance with job specfication and design requirement；In filling process, grouting pressure or
When injection rate suddenly change is larger, ascertain the reason immediately, take appropriate measures processing；Grouting should reach design pressure as early as possible,
But injection rate should be classified boosting when big；Grouting works must be carried out continuously, if interrupting for some reason, can be according to following principles at
Reason：Grouting should be recovered early, otherwise should wash boring immediately, then recover grouting.If it is invalid to rinse or rinse, it should enter
Row cleaning bottom of hole, then recovers grouting；When recovering grouting, filling should be used to be irrigated than the cement mortar of level open；If injection rate is with interrupting
Preceding is close, you can uses the cement mortar before interrupting than level instead and continues to irrigate, such as injection rate is more compared with the reduction before interruption, then slurries
Enriching it should continue to irrigate step by step；Recover after grouting, such as injection rate is many compared with the reduction before interruption, and stop inhaling in a short time
Slurry, should adopt remedial measures；
（8）Sealing of hole：During using packer grouting from top to bottom, using displacement and pressure grouting method of pore sealing or pressure grouting method of pore sealing.
Wherein, obstruction grouting method refers to one section of drilling from top to bottom, installs packer and carries out grouting method.
The drilling rod of inclined hole grouting has 68 ° of angles with horizontal plane.
The present invention is applied to the grout curtain under carbon mud layer geological conditions, can avoid destruction of the pore-creating to stratum, improve
Pore-creating speed and reduce cement consumption.Constructed using the technology, ensure that construction quality conscientiously, speed of application is fast,
Work efficiency is high, and construction safety is reliable.Social benefit and economic benefit is preferable.Extending to stratum has interlayer, the reservoir of broken interlayer
Foundation construction.
Inclined hole cement grout of the present invention is a kind of seepage control technique of dam body foundation, and it is typically located at dam body axis slightly by upper
In trip, the stratum of catalase.According to stratum, single grout curtain hole or two-row curtain grout ing hole are designed, for design curtain
Hole count elder generation division unit, in sequence.Each unit selects pilot hole in I sequence hole, and pilot hole is crept into from top to bottom, the rock drilled through
Stone core sample will be finally completed every section of packer permeability test by drilling depth numbering reaction stratum rocky condition, see in rock mass every section saturating
Water rate hole depth calculates reference, pilot hole according to head pressure and stratum crushing situation, if creeping into minimum one according to result of calculation
Section permeability rate is larger, also to continue drilling, and final determine first is combined according to the packer permeability test done for calculating hole depth and pilot hole
The hole depth of guide hole, finally determines the hole depth of the cell orifice.Construction follows the principle gradually encrypted：First construct downstream row, in construction
The grout curtain of upstream row, intermediate row of finally constructing；For each unit, I sequence hole of the unit of first constructing, in II sequence of constructing
Hole, three sequence holes of final construction.After each unit completes grouting, according to code requirement, hole is checked, unit grouting matter is checked
Whether amount is qualified.
The advantage of the invention is that：Solving upright opening, cleaning bottom of hole, Grouting Cement consumption are big repeatedly during pore-creating in carbon mud layer,
The problems such as grout compartment can not close slurry.Constructed using the technology, carbon mud layer can be bypassed, improve pore-creating speed, in the grouting
Under section limiting pressure, a large amount of cement consumptions are reduced, reaches and closes slurry condition, meet construction quality requirement.
The invention will be further described with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is the process chart of the embodiment of the present invention.
Embodiment
The preferred embodiments of the present invention are illustrated below, it will be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Inclined hole cement grout construction method, comprises the following steps：
（1）Determine hole position：The position of grout hole is accurately marked according to design requirement, and carries out repetition measurement；
（2）Drilling is in place with grouting equipment：After grout hole demarcation, mobile drill to bore position is adjusted by design requirement and drilled
Angle and fixed rig, complete rig in place；Grouting equipment should be installed nearby, and grouting pipeline is unsuitable long, to prevent the pressure loss；
（3）Drilling：With drilling tool alignment institute target plane hole position, with the drill bit perforate for meeting design requirement and drill；Boring procedure
In should select suitable boring pressure, rig rotating speed and coolant rate, and note situation in hole, it is to avoid bit freezing, burying, the burning of bits
Etc. accident；
（4）Plasma resistance plug is installed：During using grouting method from top to bottom, packer is not lived in predetermined position plug, its method adjusted
It is suitably to move up or move down, until finding the position that can be blocked；The length of grout compartment is increased if when moving up, works as grout compartment
When length is more than 10m, it should adopt remedial measures；The method remedied is usually that inspection hole is arranged by it, is sent out by inspection hole
Its existing influence degree, while supplementary irrigation can be carried out；
（5）Hole flushing and packer permeability test：After the completion of bore flushing, reply grout compartment is rinsed with press water；Flushing pressure can be adopted
With 80% grouting pressure, when pressure is more than 1MPa, using lMPa；Bore flushing terminates to the peace and quiet rear 10min of backwater；Hole flushing is
In order to avoid drilling cuttings blocks the crack on hole wall, water is returned in aperture during hole flushing will reach that water sand removal is net；Packer permeability test purpose is to check
Infiltration situation before the filling of stratum；
（6）River Bank Stability：Preparation meets the design grouting slurries to be shown；
Cement grout typically uses striaght cement slurries, and the mixing time of striaght cement slurries during using normal agitation machine, should be no less than
3min；During using homogenizer, no less than 30s；Slurries should sieve before use, make the time being finished to the utmost by oneself less than 4h；
Under special geologic condition or when having particular/special requirement, as needed, proved by live grouting test, it is possible to use following classes
Slurries：Thin cement grout：Mean dry grinding cement grout, damp milled microcements slurries and superfine cement slurries；Stable slurry：Mean mixed with
A small amount of stabilizer, syneresis rate is not more than 5% cement grout；
（7）Grouting：Grouting construction is implemented in strict accordance with job specfication and design requirement；In filling process, grouting pressure or
When injection rate suddenly change is larger, ascertain the reason immediately, take appropriate measures processing；Grouting should reach design pressure as early as possible,
But injection rate should be classified boosting when big；Grouting works must be carried out continuously, if interrupting for some reason, can be according to following principles at
Reason：Grouting should be recovered early, otherwise should wash boring immediately, then recover grouting.If it is invalid to rinse or rinse, it should enter
Row cleaning bottom of hole, then recovers grouting；When recovering grouting, filling should be used to be irrigated than the cement mortar of level open；If injection rate is with interrupting
Preceding is close, you can uses the cement mortar before interrupting than level instead and continues to irrigate, such as injection rate is more compared with the reduction before interruption, then slurries
Enriching it should continue to irrigate step by step；Recover after grouting, such as injection rate is many compared with the reduction before interruption, and stop inhaling in a short time
Slurry, should adopt remedial measures；
（8）Sealing of hole：During using packer grouting from top to bottom, using displacement and pressure grouting method of pore sealing or pressure grouting method of pore sealing.
Wherein, obstruction grouting method refers to one section of drilling from top to bottom, installs packer and carries out grouting method.
The drilling rod of inclined hole grouting has 68 ° of angles with horizontal plane.
The construction method 2013.8-2014.1 months of the present invention are constructed, and upright opening grout curtain is carried out according to traditional handicraft,
At carbon mud layer grout curtain from top to bottom or comprehensive grouting pore-creating, with same vertical hole correspondence inclined hole 54 hole, upright opening grouting system
3240m is calculated as, the time is 2013.3 months to 2013.8 months, using 2 rock drills, added up to 180 days；Inclined hole grouting statistics be
3450.5m, 2013.9 to 2014.1 months, using 2 rock drills, adds up to 120 days, saves 60 days durations.Inclined hole grouting is reduced
Pore-creating rice number, to pore forming material（It is drill bit, drilling tool, artificial）And pore-creating cost is obviously reduced.At present, reservoir completes in advance, reaches
To retaining requirement, from engineering global analysis, increase engineering operation income in advance.
Application example
1 project profile and grouting equipment improvement
Two road ditch-water warehouse compartments are located at east longitude 93 ° 19 ' 41 at San Tanghu townshiies of Barkol county, reservoir dam site ", 43 ° 58 ' 35 of north latitude ".
The m3 of two road ditch total reservoir storage 413.59 ten thousand, barrage maximum height of dam 60.31m, the m3 of minimum capacity of a reservoir 550,000, the m3 of utilizable capacity 3,050,000,
Reservoir capacity for flood control (check flood level to normal pool level) 53.59 ten thousand m3, two road ditch reservoir fractions are 97%, are downstream work every year
263.08 ten thousand m3 of industry water supply.It is small that this reservoir hinge belongs to IV etc.（I）Type engineering.Building rank：Dam, the water conservancy diversion sand washing hole that discharges water,
The permanent key construction such as spillway is 4 grades, and secondary structure is 5 grades, and temporary structure is 5 grades.
The road ditch reservoir dam site geological condition of Barkol two, Dam Site left bank exposure stratum is system Ya Mansu groups the under the Carboniferous System
Three subgroups (the alternate amygdaloidal Black Warrior porphyrite of (C1yC) purple, celadon, andesitic porphyrite；Right bank exposure stratum is the Devonian system
Under -- middle road ditch group (D1-2S) celadon of system Mo Qinwula groups three, Dark grey peace mountain matter landwaste, crystal tuff；Two groups of stratum
For fault contact.Influenceed by regional structure, rock mass fracture growth, more crush, determine that position of fault, in left dam abutment, is actually being applied
In work, according to design and construction, grout curtain is carried out to dam site section, the dam abutment pile No. 0+110-0+138 that keeps right is found in drilling
Region drilling takes thing rate very low, is not almost drilled through in thing, boring procedure mesopore to hole to pile No. 0+120-0+135 regions
Outer to gush Heisui River, drilling is very fast, but pore-forming is almost nil, and this situation occurs my unit and stops brill immediately, reports field geology engineering
Shi Hou, causes Hami Prefecture about the great attention of leader, is analyzed first against Complicated Geologic Condition, position of fault becomes
Change, it is also possible to there are multiple tomographies.But lithology concrete condition under dam site is not determined, such geological condition compares broken-rock zone
The many of complexity are wanted, are one of complicated geological lithology.Coordinated by water conservancy bureau of Hami Prefecture, repeatedly ask Hami Prefecture expert, even
Xinjiang water conservancy department authoritative expert checks to job site, determines that result dam site has been seated in a kind of waterproof, and intensity is very low, meet
Water softening carbon mud layer on, should not typically be disturbed with rig, can reach it is waterproof, for being in the milk for disturbance.Because no
Width, the depth of carbon mud layer are determined, to ensure grouting quality to determine earth formation according to expert advice.I passes through at unit
Carefully study drilling and take thing, finally determine earth formation, the vertical axis of dam in riverbed, the dam foundation is shown in that dam abutment inclines to the left at basal plane position
Tiltedly, see that dam abutment is tilted to the right, width has 3-5m below basal plane, depth is deep according to head, Grouting Design specification vertical drilling before dam
Spend on the basis of 60m, determine that carbon mud layer depth continues to be born into stratum in projected depth 60m, carbon mud layer is boundary's longitudinal dike axis two
Side is respectively to waste rib rock, crushed zone, influence crushed zone.
We complete design upright opening grouting to stratum particularity, on this basis according to carbon mud layer angle of inclination and complexity
Geological structure, it is ensured that seepage prevention of dam founda effect is perfectly safe, Experts ' determines that opinion is, for having filled the vertical of carbon mud layer region
After the grouting of hole, carry out strengthening inclined hole grouting, inclined hole horizontal layout is as upright opening horizontal layout.Inclined hole depth is 64.7m, is inclined
Oblique situation, longitudinal dike axis is on the basis of designing inclined hole arrangement hole position, and aperture is kept left dam abutment, and gradually dam abutment is tilted with seeing hole body to the right
Basal plane angle is 68 °.
The road ditch reservoir of Barkol two goes into operation from May, 2012, and grouting works are since in September, 2012 until in May, 2014
Terminate, being in the milk by inclined hole, we have grasped the improvement of technical essential, particularly packer that inclined hole is in the milk, allow grouting in progress
On have important breakthrough.Final inspection, meets quality requirement.（Pay table）
Inclined hole unit injection rate is counted
| Construction part | Kong Hao | Sequence number | The average injection rate (Kg/m) of complete opening unit |
| Preventing seepage handling of base of a dam | XWY-11-1-I | I | 43.2Kg/m |
| Preventing seepage handling of base of a dam | XWY-10-1-I | I | 59.6Kg/m |
| Preventing seepage handling of base of a dam | XWY-9-I | I | 62.7Kg/m |
Guide's pore pressure water statistic (LU)
Check pore pressure water statistic (LU)
2 Yiwu County A Latong lid reservoirs
A Latong lid reservoirs are a Wall in Plain Reservoir, panel connect and to be formed with geomembrane together with impervious body, due to storage time long,
To be reinforced at part panels, it is final to determine that, using inclined hole grouting, quality meets design requirement.
3 engineering monitorings and evaluation of result
By management to inclined hole and geological research institute of autonomous region（Quality Supervision Station）Detection confirms that inspection result of being in the milk meets quality and wanted
Ask, permeability rate is almost nil.Two road ditch reservoirs of my unit construction of current several reservoirs are unique one and reach retaining requirement
Reservoir engineering.Obtain the accreditation of water conservancy bureau of Barkol county and relevant departments of autonomous region.
Various equipment employed in the present invention, are the conventional equipment used in the production technology of this area, and each equipment
Operation, parameter etc. carried out according to routine operation, have no special feature.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (3)
1. inclined hole cement grout construction method, it is characterised in that comprise the following steps：
（1）Determine hole position：The position of grout hole is accurately marked according to design requirement, and carries out repetition measurement；
（2）Drilling is in place with grouting equipment：After grout hole demarcation, mobile drill to bore position is adjusted by design requirement and drilled
Angle and fixed rig, complete rig in place；Grouting equipment should be installed nearby, and grouting pipeline is unsuitable long, to prevent the pressure loss；
（3）Drilling：With drilling tool alignment institute target plane hole position, with the drill bit perforate for meeting design requirement and drill；Boring procedure
In should select suitable boring pressure, rig rotating speed and coolant rate, and note situation in hole, it is to avoid bit freezing, burying, the burning of bits
Accident；
（4）Plasma resistance plug is installed：During using grouting method from top to bottom, packer is not lived in predetermined position plug, its method adjusted
It is suitably to move up or move down, until finding the position that can be blocked；The length of grout compartment is increased if when moving up, works as grout compartment
When length is more than 10m, it should adopt remedial measures；The method remedied is usually that inspection hole is arranged by it, is sent out by inspection hole
Its existing influence degree, while carrying out supplementary irrigation；
（5）Hole flushing and packer permeability test：After the completion of bore flushing, reply grout compartment is rinsed with press water；Flushing pressure can be adopted
With 80% grouting pressure, when pressure is more than 1MPa, using lMPa；Bore flushing terminates to the peace and quiet rear 10min of backwater；Hole flushing is
In order to avoid drilling cuttings blocks the crack on hole wall, water is returned in aperture during hole flushing will reach that water sand removal is net；Packer permeability test purpose is to check
Infiltration situation before the filling of stratum；
（6）River Bank Stability：Preparation meets the design grouting slurries to be shown；
（7）Grouting：Grouting construction is implemented in strict accordance with job specfication and design requirement；
（8）Sealing of hole：During using packer grouting from top to bottom, using displacement and pressure grouting method of pore sealing or pressure grouting method of pore sealing.
2. inclined hole cement grout construction method according to claim 1, it is characterised in that：
The step（6）Cement grout typically uses striaght cement slurries, and the mixing time of striaght cement slurries uses normal agitation machine
When, 3min should be no less than；During using homogenizer, no less than 30s；Slurries should sieve before use, what self-control was finished to the utmost
Time is less than 4h；Under special geologic condition or when having particular/special requirement, as needed, proved, also may be used by live grouting test
Use following classes slurries：Thin cement grout：Mean dry grinding cement grout, damp milled microcements slurries and superfine cement slurries；It is stable
Slurries：Mean that, mixed with a small amount of stabilizer, syneresis rate is not more than 5% cement grout.
3. inclined hole cement grout construction method according to claim 1, it is characterised in that：
The step（7）In filling process, when grouting pressure or larger injection rate suddenly change, ascertain the reason immediately, take phase
The measure processing answered；Grouting should reach design pressure as early as possible, but injection rate it is big when should be classified boosting；Grouting works must continuously enter
OK, if interrupting for some reason, it can be handled according to following principles：Grouting should be recovered early, otherwise should wash boring immediately, it is then extensive
Multiple grouting；If it is invalid to rinse or rinse, cleaning bottom of hole should be carried out, then recovers grouting；When recovering grouting, filling should be used to compare open
The cement mortar of level is irrigated；As injection rate is close with before interruption, you can use the cement mortar before interrupting than level instead and continue to irrigate,
Such as injection rate is more compared with the reduction before interruption, then slurries enriching should continue to irrigate step by step；Recover after grouting, such as injection rate is relatively interrupted
Preceding reduction is a lot, and stops midge in a short time, adopts remedial measures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610995192.3A CN107130583A (en) | 2016-11-11 | 2016-11-11 | Inclined hole cement grout construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610995192.3A CN107130583A (en) | 2016-11-11 | 2016-11-11 | Inclined hole cement grout construction method |
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| CN107587502A (en) * | 2017-09-23 | 2018-01-16 | 北京建材地质工程有限公司 | A kind of spiral-digging pore pressure pour water soil occlusion curtain pile construction method |
| CN110077134A (en) * | 2019-04-01 | 2019-08-02 | 燕山大学 | A kind of forging marking labeling method and device |
| CN113202325A (en) * | 2021-04-27 | 2021-08-03 | 中国水利水电第十一工程局有限公司 | Deep hole epoxy resin chemical grouting construction method |
| CN114232631A (en) * | 2021-12-02 | 2022-03-25 | 福建省天硕建设发展有限公司 | Dynamic water foundation pit cofferdam systematic grouting process |
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| CN107587502A (en) * | 2017-09-23 | 2018-01-16 | 北京建材地质工程有限公司 | A kind of spiral-digging pore pressure pour water soil occlusion curtain pile construction method |
| CN110077134A (en) * | 2019-04-01 | 2019-08-02 | 燕山大学 | A kind of forging marking labeling method and device |
| CN113202325A (en) * | 2021-04-27 | 2021-08-03 | 中国水利水电第十一工程局有限公司 | Deep hole epoxy resin chemical grouting construction method |
| CN114232631A (en) * | 2021-12-02 | 2022-03-25 | 福建省天硕建设发展有限公司 | Dynamic water foundation pit cofferdam systematic grouting process |
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