CN108442380A - A kind of reservoir engineering shotcrete concrete construction - Google Patents
A kind of reservoir engineering shotcrete concrete construction Download PDFInfo
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- CN108442380A CN108442380A CN201710084567.5A CN201710084567A CN108442380A CN 108442380 A CN108442380 A CN 108442380A CN 201710084567 A CN201710084567 A CN 201710084567A CN 108442380 A CN108442380 A CN 108442380A
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- spray
- concrete
- bar
- jetting cement
- mat reinforcement
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- 239000004567 concrete Substances 0.000 title claims abstract description 51
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 239000011378 shotcrete Substances 0.000 title claims abstract description 14
- 239000007921 spray Substances 0.000 claims abstract description 54
- 239000004568 cement Substances 0.000 claims abstract description 43
- 230000002787 reinforcement Effects 0.000 claims abstract description 25
- 239000011435 rock Substances 0.000 claims abstract description 18
- 239000004575 stone Substances 0.000 claims abstract description 14
- 230000002633 protecting Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 22
- 239000007924 injection Substances 0.000 claims description 22
- 231100000241 scar Toxicity 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 12
- 239000010410 layer Substances 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 241000196324 Embryophyta Species 0.000 claims description 3
- 206010057071 Rectal tenesmus Diseases 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 239000010437 gem Substances 0.000 claims description 3
- 229910001751 gemstone Inorganic materials 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 241000196435 Prunus domestica subsp. insititia Species 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000000368 destabilizing Effects 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000007569 slipcasting Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- SXYIRMFQILZOAM-HVNFFKDJSA-N (3R,5aS,6R,8aS,9R,10S,12R,12aR)-10-methoxy-3,6,9-trimethyldecahydro-3,12-epoxypyrano[4,3-j][1,2]benzodioxepines Chemical compound C1C[C@H]2[C@H](C)CC[C@H]3[C@@H](C)[C@@H](OC)O[C@H]4[C@]32OO[C@@]1(C)O4 SXYIRMFQILZOAM-HVNFFKDJSA-N 0.000 description 1
- 210000003205 Muscles Anatomy 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004166 bioassay Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
Abstract
The invention discloses a kind of reservoir engineering shotcrete concrete constructions, during the reservoir construction of Southern Xinjiang, all there is destabilizing factor in all side slope rocks, stone is fallen at any time under its own gravity, especially rainy day, sometimes it has a large amount of rocks integrally to come down, there are severe compromise, spray shield must spray the case where protecting when excavating；The engineering method is optimized by protecting anchor pole, being laid with bar-mat reinforcement and jetting cement, and to specific construction parameter, and having reached reduces cost, improves the effect of working security.
Description
Technical field
The present invention relates to technical field of building construction more particularly to a kind of reservoir engineering shotcrete concrete constructions.
Background technology
Applicant enters Hami Prefecture in South Sinkiang section, and through painstaking efforts in a few years, water conservancy industry is opened in Hami
Market, and established certain basis.This area is since geological structure is inconsistent, and according to design requirement, all excavation slopes are naked
It is exposed at surface rock, to prevent weathering to be required to carry out spray shield processing.It is divided by construction part, every reservoir, which mainly sprays, protects and lead stream
Spray shield in hole and irrigation tunnel inlet and outlet rock slope, diversion tunnel and irrigation tunnel hole, Spillway Slope spray shield, road slope spray protect and
5 parts of dam body side slope spray shield；According to live rock actual conditions, it is divided into shotcrete concrete and element spray concrete；All side slope rocks are all deposited
In destabilizing factor, stone, especially rainy day are fallen at any time under its own gravity, have a large amount of rocks sometimes and integrally come down,
There are severe compromise, spray shield must spray shield when excavating.
Invention content
Technical problems based on background technology, the present invention propose a kind of reservoir engineering shotcrete concrete construction.
Technical scheme is as follows：
A kind of reservoir engineering shotcrete concrete construction, includes the following steps：
A, the landing stage of scaffold is set up；
B, the slope surface cubic metre of earth and stone is cleared up：Remove surface dust, float stone at the top of linked network region；
C, anchor pole protects：It is by design elevation requirement, anchor pole hole site is accurate after the completion of bolthole surveying setting-out slope excavating
For surveying setting-out in slope surface, hole position error must not exceed ± 50mm；
D, linked network and jetting cement：It is laid with bar-mat reinforcement and jetting cement；
Preferably, the bar-mat reinforcement laying method, includes the following steps：First injection 4~5cm thickness concretes close rock for jetting cement construction
Face hangs bar-mat reinforcement, design thickness is sprayed onto again to just spraying after scar is cleared up.
When bar-mat reinforcement is laid with, following main points are should be noted：
A. bar-mat reinforcement spreads extension, protective layer thickness >=2cm after first 4~5cm of jetting cement；
B. bar-mat reinforcement is laid with the fluctuating of first spray plane, with the gap by spray plane it is general≤3cm；
Reduce nozzle when c. opening spray extremely by spray plane distance, and adjusts spray angle, bar-mat reinforcement protective layer thickness >=4cm；
When being blocked by bar-mat reinforcement if any the stone or concrete block to fall off in d. spraying, fill-before-fire concrete after removing in time.
Injection concrete ratio is designed according to the requirement of concrete strength and other physical and mechanical properties and spray technology, is specifically set
Meter step includes the following steps：
Determine the maximum particle diameter and sand coarse aggregate ratio of aggregate；
Determine cement consumption；
Determine the ratio of mud and water consumption；
Determine sand, stone dosage；
Examination spray；
It adjusts, determine coordination in works.
Preferably, the injection concrete construction method, includes the following steps：
A, first to being handled by spray scar before injection, general scar is first with high pressure water washing by floating dust, the landwaste of spray scar, rock
When the easy deliquescence of water, argillization are met in face, scar is blown off with high-pressure blast；
B, one layer of cement mortar, the fill-before-fire concrete after final set are first sprayed before jetting cement；
C, mark of the steel bar end as control jetting cement thickness is buried；
D, the routes of pipe line such as plant and wind, water, electricity are checked, by wet-spraying machine simultaneously test running in place；
E, concrete strictly presses coordination in works dispensing, and accelerator is added in spraying machine feeding；
F, jetting cement operation is carried out：Jetting cement using segmentation, fragment, be layered carry out successively, injection order from bottom to top, sector boss
Degree≤6m.First low-lying place is substantially sprayed when injection and is put down, then sequence from low to uper part layering, reciprocal injection.
G, the final set of maintenance jetting cement is conserved in time after 2 hours, and curing time is not less than 14d；Temperature is prohibited when being less than 5 DEG C
Only watering maintenance.
H, quality examination checks jetting cement surface, if has phenomena such as loosening, cracking, tenesmus, sliding, if any clear in time
Except respraying.Sprinkler body can listen sound after reaching some strength with hammering, to being handled in time at hollowing shelling.Jewel hole measures, and thickness is not
Enough places fill spray.Rebound degree and practical match ratio are measured in time, mechanical test is carried out to sprinkler body test specimen, to instruct lower step construction.
Preferably, when specific jetting cement operation, pay attention to following main points：
A) when section constructions, inclined-plane is reserved in leading portion jetting cement joint, surface width is 20~30cm, and pressure is first used on inclined-plane
Power water rinses fill-before-fire concrete after wetting；
B) fragments are injected from down and upper progress；
C) when layerings injection, later layer carries out after being injected in preceding layer concrete final set.When being sprayed again after final set 1h, wind is first used
Water cleans spray-up surface.The thickness of jetting cement is not slid with concrete not to fall to spend, and can neither influence concrete because thickness is too big
Cohesive force and cohesiveness, can not be too thin and increase springback capacity.
D) controls jet velocity, compacted in favor of concrete.Wind pressure is excessive, and jet velocity increases, and rebound increases；Wind pressure
Too small, jet velocity is too small, and compaction force is small, influences concrete strength.Therefore notice that observation wind pressure, starting wind pressure reach after powering
Just start to operate after 0.5MPa, and wind pressure is adjusted according to nozzle discharging situation；
E) make nozzle when sprays and keep suitable distance between by spray plane, spray angle is as close possible to 90 °, to obtain maximum pressure
Real and minimum rebound.Nozzle is controlled with by spray plane spacing in 1.5~2.0m.
The invention has the beneficial effects that：During the reservoir construction of Southern Xinjiang, all side slope rocks all exist not
Ballast, falls stone, especially rainy day at any time under its own gravity, has a large amount of rocks sometimes and integrally comes down, exists
Severe compromise, spray shield must spray shield when excavating；The present invention provides a kind of reservoir engineering shotcrete concrete construction, the works
Method is optimized by protecting anchor pole, being laid with bar-mat reinforcement and jetting cement, and to specific construction parameter, reached reduction at
This, improves the effect of working security.
Specific implementation mode
Embodiment：
A kind of reservoir engineering shotcrete concrete construction, includes the following steps：
A, the landing stage of scaffold is set up；
B, the slope surface cubic metre of earth and stone is cleared up：Remove surface dust, float stone at the top of linked network region；
C, anchor pole protects：It is by design elevation requirement, anchor pole hole site is accurate after the completion of bolthole surveying setting-out slope excavating
For surveying setting-out in slope surface, hole position error must not exceed ± 50mm；
D, linked network and jetting cement：It is laid with bar-mat reinforcement and jetting cement；
The bar-mat reinforcement laying method, includes the following steps：First injection 4~5cm thickness concretes close scar for jetting cement construction, hang steel
Muscle net is sprayed onto design thickness again to just spraying after scar is cleared up.
The described anchor pole protection, includes the following steps and construction point：
(1), after the completion of bolthole surveying setting-out slope excavating, by design elevation requirement, anchor pole hole site is accurately measured and is put
For line in slope surface, hole position error must not exceed ± 50mm.The specific length of perpendicular rib can be determined according to practical slope height, but anchor pole
Position must carry out setting-out by the length of decile slope surface, its spacing can adjust suitably.Such as existing brush side's slope surface irregularity or spy
When different difficulty place, it need to approve through design surpervision unit, under the premise of ensuring slope stability and structure safety, it is fixed suitably to relax
Position precision or adjustment anchor hole position
(2), the selection of drilling device drilling machine, according to the classification on anchoring stratum, anchor pole aperture, anchor pole depth and construction
Site condition etc. selects drilling device.Diameter phi 50mm down-the-hole impact holings are used in rock stratum；In crushing rock formation or soft full
Water etc. be easy to collapse hole and bit freezing burying stratum in use pipe-following drilling technology.
(3), drilling machine sets up platform using φ 50mm scaffolding poles in place, and platform is fixed with anchor pole and slope surface, and drilling machine is with three
Foot support is promoted onto platform.Bolthole drilling construction sets up the scaffold for meeting respective carrier ability and firm condition, according to
Slope surface measuring hole position, the accurate fixed drilling machine of installation, and strictly conscientiously carry out seat in the plane adjustment, it is ensured that anchor cable, bolthole spud in place
Error must not exceed ± 50mm in length and breadth, and vertical error must not exceed ± 100mm, and dip angle of hole and direction meet design requirement, incline
Angle allowable error position ± 1.0 °, orientation allowable error ± 2.0 °.The angle of cut z of anchor cable, anchor pole and horizontal plane is not more than 20 °, generally
Between 15 °~20 °.
(4), mode is crept into
Boring requirement drilled dry is forbidden using water drilling.
(5), drilling process
To the formation variation in each hole in drilling process, state is crept into（Bit pressure, drilling speed）, underground water and some special circumstances perform
Site operation records.It when drilling phenomenon as bad such as collapse hole shrinkage cavity etc., must stop to bore immediately, carry out grouting for braced wall processing in time（It fills
Starch 0.1~0.2MPa of pressure）, after cement mortar initial set, cleaning bottom of hole is crept into again.
(6), hole diameter, deep drilling
Boring aperture, hole depth require to cannot be less than design value.To ensure anchor pole bore dia and depth, it is desirable that actual use drill bit is straight
Diameter cannot be less than design aperture, and practical hole depth is more than projected depth 0.2m or more.
(7), bolthole is cleared up
After drilling reaches projected depth, it cannot stop to bore immediately, it is desirable that surely bore 1~2 minute, prevent bottom hole pinching, design is not achieved
Aperture.Borehole wall must not have heavy quarrel and water body viscous, it is necessary to clean out, after the completion of drilling, use pressure-air（Wind pressure
0.2~0.4MPa）Rock powder in hole and water body are all removed outside portalling, in order to avoid reduce the bonding of cement mortar and hole wall Rock And Soil
Intensity.In addition to the complete rock anchorage of relative rigid, high pressure water washing must not be used.If meeting in anchor hole has artesian water outflow, wait for
Hydraulic pressure, water can pacify down dowel and slip casting after becoming smaller, and suitable position setting osculum is handled around when necessary.If design
It is required that processing anchor hole accumulated inside water body, generally using the processing of the methods of the secondary drilling of grout sealing.
(8), bolthole is examined
After anchor pole hole drill is made, next procedure must can be carried out through site supervision after the assay was approved.Aperture, hole depth check one
As using verifying under conditions of station by design aperture, drill bit and standard drill pipe at the scene management, it is desirable that drill bit is flat during verifying
Forwards is not into generating impact or shake, drilling tool, which is tested, send length to meet design anchor pole hole depth, moves back brill and requires smooth, uses high-pressure blast
It blows to test and does not deposit apparent splashing dirt quarrel and water body phenomenon.Check anchor hole hole position, inclination angle and orientation, whole anchor hole constructions point are required simultaneously
After item work is qualified, you can think that anchor hole brill makes inspection qualification.
(9), anchor bar body makes and installs
Anchor pole is made by design requirement, not only to ensure length in hole, and to have enough protective layers.Dowel tail end anti-corrosion
It is handled using anti-corrosion measures such as mopping, oilings.Before installation, it is to be ensured that every reinforcing bar is straight, derusts, degreases, and installs anchor bar body
Preceding conscientiously verification anchor hole is numbered again, uses high-pressure blast aperture blowing after confirmation is errorless again, manually slowly anchor bar body is put into hole.
(10), anchor bolt grouting
Slip casting uses Twice High Pressure Splitting Grouting.Since bottom hole, practical grouting amount is generally greater than for common pressure grouting operation
Theoretical grouting amount, or no longer be vented using anchorage gas vent and standard that slurries spilling underflow in aperture terminates as slip casting.
When bar-mat reinforcement is laid with, following main points are should be noted：
A. bar-mat reinforcement spreads extension, protective layer thickness >=2cm after first 4~5cm of jetting cement；
B. bar-mat reinforcement is laid with the fluctuating of first spray plane, with the gap by spray plane it is general≤3cm；
Reduce nozzle when c. opening spray extremely by spray plane distance, and adjusts spray angle, bar-mat reinforcement protective layer thickness >=4cm；
When being blocked by bar-mat reinforcement if any the stone or concrete block to fall off in d. spraying, fill-before-fire concrete after removing in time.
Injection concrete ratio is designed according to the requirement of concrete strength and other physical and mechanical properties and spray technology, is specifically set
Meter step includes the following steps：
Determine the maximum particle diameter and sand coarse aggregate ratio of aggregate；
Determine cement consumption；
Determine the ratio of mud and water consumption；
Determine sand, stone dosage；
Examination spray；
It adjusts, determine coordination in works.
The injection concrete construction method, includes the following steps：
A, first to being handled by spray scar before injection, general scar is first with high pressure water washing by floating dust, the landwaste of spray scar, rock
When the easy deliquescence of water, argillization are met in face, scar is blown off with high-pressure blast；
B, one layer of cement mortar, the fill-before-fire concrete after final set are first sprayed before jetting cement；
C, mark of the steel bar end as control jetting cement thickness is buried；
D, the routes of pipe line such as plant and wind, water, electricity are checked, by wet-spraying machine simultaneously test running in place；
E, concrete strictly presses coordination in works dispensing, and accelerator is added in spraying machine feeding；
F, jetting cement operation is carried out：Jetting cement using segmentation, fragment, be layered carry out successively, injection order from bottom to top, sector boss
Degree≤6m.First low-lying place is substantially sprayed when injection and is put down, then sequence from low to uper part layering, reciprocal injection.
G, the final set of maintenance jetting cement is conserved in time after 2 hours, and curing time is not less than 14d；Temperature is prohibited when being less than 5 DEG C
Only watering maintenance.
H, quality examination checks jetting cement surface, if has phenomena such as loosening, cracking, tenesmus, sliding, if any clear in time
Except respraying.Sprinkler body can listen sound after reaching some strength with hammering, to being handled in time at hollowing shelling.Jewel hole measures, and thickness is not
Enough places fill spray.Rebound degree and practical match ratio are measured in time, mechanical test is carried out to sprinkler body test specimen, to instruct lower step construction.
When specific jetting cement operation, following main points are paid attention to：
A) when section constructions, inclined-plane is reserved in leading portion jetting cement joint, surface width is 20~30cm, and pressure is first used on inclined-plane
Power water rinses fill-before-fire concrete after wetting；
B) fragments are injected from down and upper progress；
C) when layerings injection, later layer carries out after being injected in preceding layer concrete final set.When being sprayed again after final set 1h, wind is first used
Water cleans spray-up surface.The thickness of jetting cement is not slid with concrete not to fall to spend, and can neither influence concrete because thickness is too big
Cohesive force and cohesiveness, can not be too thin and increase springback capacity.
D) controls jet velocity, compacted in favor of concrete.Wind pressure is excessive, and jet velocity increases, and rebound increases；Wind pressure
Too small, jet velocity is too small, and compaction force is small, influences concrete strength.Therefore notice that observation wind pressure, starting wind pressure reach after powering
Just start to operate after 0.5MPa, and wind pressure is adjusted according to nozzle discharging situation；
E) make nozzle when sprays and keep suitable distance between by spray plane, spray angle is as close possible to 90 °, to obtain maximum pressure
Real and minimum rebound.Nozzle is controlled with by spray plane spacing in 1.5~2.0m.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of reservoir engineering shotcrete concrete construction, which is characterized in that include the following steps：
A, the landing stage of scaffold is set up；
B, the slope surface cubic metre of earth and stone is cleared up：Remove surface dust, float stone at the top of linked network region；
C, anchor pole protects：It is by design elevation requirement, anchor pole hole site is accurate after the completion of bolthole surveying setting-out slope excavating
For surveying setting-out in slope surface, hole position error must not exceed ± 50mm；
D, linked network and jetting cement：It is laid with bar-mat reinforcement and jetting cement.
2. reservoir engineering shotcrete concrete construction as described in claim 1, which is characterized in that the bar-mat reinforcement laying side
Method includes the following steps：First injection 4~5cm thickness concretes close scar for jetting cement construction, hang bar-mat reinforcement, clear to just spraying scar progress
Design thickness is sprayed onto after reason again.
3. reservoir engineering shotcrete concrete construction as described in claim 1, which is characterized in that when bar-mat reinforcement is laid with, should be noted
Following main points：
A. bar-mat reinforcement spreads extension, protective layer thickness >=2cm after first 4~5cm of jetting cement；
B. bar-mat reinforcement is laid with the fluctuating of first spray plane, with the gap by spray plane it is general≤3cm；
Reduce nozzle when c. opening spray extremely by spray plane distance, and adjusts spray angle, bar-mat reinforcement protective layer thickness >=4cm；
When being blocked by bar-mat reinforcement if any the stone or concrete block to fall off in d. spraying, fill-before-fire concrete after removing in time.
4. reservoir engineering shotcrete concrete construction as described in claim 1, which is characterized in that the jetting cement construction party
Method includes the following steps：
A, first to being handled by spray scar before injection, general scar is first with high pressure water washing by floating dust, the landwaste of spray scar, rock
When the easy deliquescence of water, argillization are met in face, scar is blown off with high-pressure blast；
B, one layer of cement mortar, the fill-before-fire concrete after final set are first sprayed before jetting cement；
C, mark of the steel bar end as control jetting cement thickness is buried；
D, the routes of pipe line such as plant and wind, water, electricity are checked, by wet-spraying machine simultaneously test running in place；
E, concrete strictly presses coordination in works dispensing, and accelerator is added in spraying machine feeding；
F, jetting cement operation is carried out：Jetting cement using segmentation, fragment, be layered carry out successively, injection order from bottom to top, sector boss
Degree≤6m；First low-lying place is substantially sprayed when injection and is put down, then sequence from low to uper part layering, reciprocal injection；
G, the final set of maintenance jetting cement is conserved in time after 2 hours, and curing time is not less than 14d；Temperature is forbidden spilling when being less than 5 DEG C
Water curing；
H, quality examination checks jetting cement surface, if has phenomena such as loosening, cracking, tenesmus, sliding, weight is removed if any timely
Spray；Sprinkler body can listen sound after reaching some strength with hammering, to being handled in time at hollowing shelling；Jewel hole measures, at thickness low LCL
It fills spray；Rebound degree and practical match ratio are measured in time, mechanical test is carried out to sprinkler body test specimen, to instruct lower step construction.
5. reservoir engineering shotcrete concrete construction as described in claim 1, which is characterized in that when specific jetting cement operation, note
It anticipates following main points：
A) when section constructions, inclined-plane is reserved in leading portion jetting cement joint, surface width is 20~30cm, and pressure is first used on inclined-plane
Power water rinses fill-before-fire concrete after wetting；
B) fragments are injected from down and upper progress；
C) when layerings injection, later layer carries out after being injected in preceding layer concrete final set；
D) controls jet velocity, compacted in favor of concrete；Notice that observation wind pressure, starting wind pressure reach 0.5MPa after powering
Just start to operate afterwards, and wind pressure is adjusted according to nozzle discharging situation；
E) make nozzle when sprays and keep suitable distance between by spray plane, spray angle is as close possible to 90 °；Nozzle with by spray plane
Spacing is controlled in 1.5~2.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710084567.5A CN108442380A (en) | 2017-02-16 | 2017-02-16 | A kind of reservoir engineering shotcrete concrete construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710084567.5A CN108442380A (en) | 2017-02-16 | 2017-02-16 | A kind of reservoir engineering shotcrete concrete construction |
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| CN108442380A true CN108442380A (en) | 2018-08-24 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131221A (en) * | 1995-12-29 | 1996-09-18 | 曾宪明 | Supporting and protecting method for base pit, side slope, flat anchor and spray net |
| CN204098049U (en) * | 2014-10-15 | 2015-01-14 | 中冶集团武汉勘察研究院有限公司 | A kind of protective reinforcing structure of broken rock mass slope |
| CN105220698A (en) * | 2015-08-21 | 2016-01-06 | 武汉沃田生态科技有限公司 | A kind of rock slope ecological protection method |
| CN205399445U (en) * | 2016-03-10 | 2016-07-27 | 马鞍山钢铁建设集团有限公司 | High cliff stone side slope combined bolting and shotcrete structure |
-
2017
- 2017-02-16 CN CN201710084567.5A patent/CN108442380A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131221A (en) * | 1995-12-29 | 1996-09-18 | 曾宪明 | Supporting and protecting method for base pit, side slope, flat anchor and spray net |
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Application publication date: 20180824 |