CN105908676A - Dike underwater concrete paving construction method - Google Patents
Dike underwater concrete paving construction method Download PDFInfo
- Publication number
- CN105908676A CN105908676A CN201610258847.9A CN201610258847A CN105908676A CN 105908676 A CN105908676 A CN 105908676A CN 201610258847 A CN201610258847 A CN 201610258847A CN 105908676 A CN105908676 A CN 105908676A
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- Prior art keywords
- concrete
- cloth bag
- geotechnique
- bag
- underwater
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Classifications
-
- 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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
-
- 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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
-
- 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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
- E02B3/127—Flexible prefabricated covering elements, e.g. mats, strips bags filled at the side
Abstract
The invention discloses a dike underwater concrete paving construction method. The dike underwater concrete paving construction method comprises the steps that after offshore slope riprapping is conducted through a ship, a riprap surface is flattened; geotextile cloth bags are sewn, and the length of the geotextile cloth bags is equal to the sum of the length of an underwater paving and the length of an overwater paving of a soil texture dike; the geotextile cloth bags are sequentially laid in the shoreline construction direction; concrete is started to be poured to the bottoms of the geotextile cloth bags, and the pouring length corresponds to the designed slop length; concrete pouring is sequentially conducted from underwater tail end pouring sleeving openings of the geotextile cloth bags towards the overwater direction; the concrete flows in the geotextile cloth bags in a filling mode, all the geotextile cloth bags are filled with the concrete, and after the concrete is solidified and hardened, an underwater concrete paving is formed in a preset designed position and plays a function of protecting the underwater portion of the soil texture dike; after the concrete in the geotextile cloth bags reaches the designed strength, concrete pouring of a pressing top or an anchoring groove is conducted, and slope toe riprap pressing foot construction is carried out; and construction is not limited by seasons and can be conducted in both the low flow period and the high flow period.
Description
Technical field
The present invention relates to a kind of dam protection surface construction method in construction of hydro project research field, particularly a kind of dykes and dams
Underwater concrete mask construction method.
Background technology
Owing to excessively adopting sand, the destruction such as bank and current scour compeled by river-bed deepened, deep trouth, causes river embankment and water
Storehouse earth dam underwater portion is etched, scour, avalanche, levee toe and base of dam steepening, embankment and dam soil body stability decline, jeopardize dike
Dam safety, needs to use mechanical property concrete good, resistance to erosion that dykes and dams underwater portion is carried out mask process.
Traditional processing method was mainly in the dry season, when river and reservoir level are relatively low, at needs to soil property dike
Dam underwater portion carries out the build cofferdam, position of mask process, creates land execution conditions, installation form, pours normal concrete
Mask.Its shortcoming is: 1. the engineering time is restricted, it is necessary in the dry season, cannot implement At All Other Times, especially at needs
Can not effectively implement when speedily carrying out rescue work；2. before construction, needing to build cofferdam, after construction, there is a need to remove cofferdam, quantities is big,
Investment is big；3. before casting concrete, need installation form, after concrete hardening, need form removal, need a large amount of artificial, both
Waste template, again lost labor；4. needing to carry out operations such as vibrating, labor strength is big；5. section construction, and operation is many
Many, long in time limit.
Summary of the invention
The purpose of the present invention, is to provide a kind of dykes and dams underwater concrete mask construction method.
The present invention solves the solution of its technical problem: a kind of dykes and dams underwater concrete mask construction method, including
Following steps,
1), before making geotechnique cloth bag, carry out offshore slope jackstone by ship, and jackstone face is flattened；
2) by having certain tensile strength, permeable geotextiles be sewn into geotechnique's cloth bag, the three side sealing of building work bag closes, remaining
One opening, a length of sub-bottom changes of building work bag mask length under water and mask length sum waterborne；
3) setting up Waterborne movable operation platform in the both sides of construction part by large-scale flat pontoon, geotechnique's cloth bag is laid on waterborne
On mobile operation platform, lay poling strap in the side of building cloth bag and be positioned at the steel pipe of poling strap, by geotextiles
Bag is put under water, and lays geotechnique's cloth bag successively along water front construction direction；
4) in geotechnique's cloth bag, charge concrete, be one to pour unit with water (flow) direction 12m when charging, charge length to design slope
Length is as the criterion, and cuff every 5 m from bottom it that charge of geotechnique's cloth bag set one group；
5) concrete filling construction uses pumping technology, geotechnique's cloth bag be positioned at end under water and charge cuff successively to side waterborne
To carry out；It is ensured that overlap closely between pour during construction, and upstream pour pushes down downstream pour, offshore in lap-joint
Nearlyer pour pushes down offshore pour farther out in lap-joint；Big slump is injected from the cuff concrete pump that charges of geotechnique's cloth bag
Degree, self-flowing dense, without vibration, exempting from maintenance, the most scattered fill concrete, concrete flowing in geotechnique's cloth bag is filled,
Extend in geotechnique's cloth bag under the Gravitative Loads of concrete and sprawl, be full of whole geotechnique's cloth bag, after concrete setting hardening,
Predetermined design attitude forms underwater concrete mask, plays the effect of protection sub-bottom changes underwater portion；
6) after complete 24 hours of the concrete filling in geotechnique's cloth bag under water, the concrete in geotechnique's cloth bag reaches design strength
After, can carry out bearing down on one or the concrete filling of grappling ditch, and carry out the construction of toe jackstone presser feet.
As the further improvement of technique scheme, in step 1), during whole slope, use supersonic sounding,
Utilize ultra-sonic depth finder to measure jackstone 1m × 1, riverbed m grid sectional drawing, then utilize seat on large-scale flat pontoon
The long-armed backacter of 16m carries out mechanical whole slope, and limit is measured, the whole slope of machinery, limit, and both intert and carry out；For ensureing geotextiles under water
Bag concrete charge quality, part jackstone face need to backfill a small amount of sand or rubble is levelling, and sends under several diver's auxiliary water whole
Slope.
As the further improvement of technique scheme, in step 2) in, when sewing described geotechnique's cloth bag, each described soil
The width of work cloth bag is 12 meters, along the sewing of its width every meter together, at this between suture geotechnique cloth bag surface layer and bottom
The thickness that gap is facing concrete.
As the further improvement of technique scheme, in step 3), lay geotextiles successively along water front construction direction
Bag, for there being the geotechnological cloth bag of special-shaped unit to sit in the right seat；The sewing of geotextiles is carried out on the coast, it is common that 5 soil of sewing it up
2 geotechnological cloth bags in water are pulled into so that it is its 3 geotechnological cloth bag spreads out to water intermediate cam shape from bank slope, geotechnique's cloth bag after work cloth bag
Overlap be always positioned at waterborne；For prevent geotechnological cloth bag that water middle berth sets because of sluicing displacement or fold, geotechnique
Cloth bag corner pressure sand bag, removes sand bag before charging concrete.
As the further improvement of technique scheme, hole to bench edge distance geotechnique's cloth bag top line outer about one meter along water front side
To setting 5, stake position, the spacing of each position is 1.5m, by chain block and fastener for connection in geotechnique's cloth bag upper end poling cloth, with
Dynamic tension during regulation concrete filling.
As the further improvement of technique scheme, during charging, the geotechnological cloth bag being positioned at top, slope reserves 3%, makes
At the end of the construction of this geotechnique's cloth bag, the upper end of geotechnique's cloth bag controls in design anchor ingot ditch.
As the further improvement of technique scheme, in step 4), when the system of mixing and stirring and concrete pump debugging in place
After Hao, the cooperation of Waterborne movable operation platform need to be set up and charge.
As the further improvement of technique scheme, in step 5), the maximum particle of crushed stone of mixing concrete does not surpasses
Crossing 20mm, the mix slump is not less than 22cm, the ratio of mud 0.40～0.55, doping quantity of fly ash 15%～30%.
As the further improvement of technique scheme, in step 5), when charging construction under water, diver is needed to coordinate, latent
What water person was responsible for connecting geotechnique's cloth bag under water charges cuff and concrete pumping hose port, and tramps with one's feet and step on the geotechnique watered
Cloth bag face, the flow obstacle caused so that beneficially concrete overcomes local, deep-water pressure and basis whole slope uneven, it is ensured that coagulation
It is smooth that soil charges full and geotechnological cloth bag face, and between pour, overlap joint is tight.
As the further improvement of technique scheme, during described diver operation under water, commanding on duty waterborne
Get in touch therewith with Special answering machine under water, accept person on duty and construct command.
The invention has the beneficial effects as follows:
1, it is not subject to seasonal restrictions, all can construct in dry season and wet season；
2, be not required to cofferdam, can directly underwater construction, save great amount of work and investment；
3, with geotechnique's cloth bag as mould, template is saved；
4, without vibration, exempt from maintenance, technique is simple, saves engineering machinery, the artificial and energy, economizes on resources and invest；
5, constructing continuously, operation is few, and technique is simple, and the duration is short, and speed of application is fast, and construction quality is easily controlled；
6, mechanization degree is high, and execution conditions are good, and safe and civilized production is secure；
7, construction technology strong adaptability, adapts to various complicated landform, is particularly suitable for deep water mask, river bottom protection, institute's bank protection face area is big,
Globality is strong, good stability, and service life is long.
Detailed description of the invention
Below with reference to embodiment, the technique effect of design, concrete structure and the generation of the present invention is carried out clear, complete
Ground describes, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is the one of the present invention
Section Example rather than all embodiment, based on embodiments of the invention, those skilled in the art is not paying creativeness
Other embodiments obtained on the premise of work, belong to the scope of protection of the invention.It addition, be previously mentioned in literary composition is all
Connect/annexation, the most singly refer to that component directly connects, and refer to couple by adding or reducing according to being embodied as situation
Auxiliary, forms more excellent draw bail.
A kind of dykes and dams underwater concrete mask construction method, comprises the following steps,
1), before making geotechnique cloth bag, carry out offshore slope jackstone by ship, and jackstone face is flattened；
2) by having certain tensile strength, permeable geotextiles be sewn into geotechnique's cloth bag, the three side sealing of building work bag closes, remaining
One opening, a length of sub-bottom changes of building work bag mask length under water and mask length sum waterborne；
3) setting up Waterborne movable operation platform in the both sides of construction part by large-scale flat pontoon, geotechnique's cloth bag is laid on waterborne
On mobile operation platform, lay poling strap in the side of building cloth bag and be positioned at the steel pipe of poling strap, by geotextiles
Bag is put under water, and lays geotechnique's cloth bag successively along water front construction direction；
4) in geotechnique's cloth bag, charge concrete, be one to pour unit with water (flow) direction 12m when charging, charge length to design slope
Length is as the criterion, and cuff every 5 m from bottom it that charge of geotechnique's cloth bag set one group；
5) concrete filling construction uses pumping technology, geotechnique's cloth bag be positioned at end under water and charge cuff successively to side waterborne
To carry out；It is ensured that overlap closely between pour during construction, and upstream pour pushes down downstream pour, offshore in lap-joint
Nearlyer pour pushes down offshore pour farther out in lap-joint；Big slump is injected from the cuff concrete pump that charges of geotechnique's cloth bag
Degree, self-flowing dense, without vibration, exempting from maintenance, the most scattered fill concrete, concrete flowing in geotechnique's cloth bag is filled,
Extend in geotechnique's cloth bag under the Gravitative Loads of concrete and sprawl, be full of whole geotechnique's cloth bag, after concrete setting hardening,
Predetermined design attitude forms underwater concrete mask, plays the effect of protection sub-bottom changes underwater portion；
6) after complete 24 hours of the concrete filling in geotechnique's cloth bag under water, the concrete in geotechnique's cloth bag reaches design strength
After, can carry out bearing down on one or the concrete filling of grappling ditch, and carry out the construction of toe jackstone presser feet.
It is further used as preferred embodiment, in step 1), during whole slope, uses supersonic sounding, utilize
Jackstone 1m × 1, riverbed m grid sectional drawing measured by ultra-sonic depth finder, then utilizes seat 16m length on large-scale flat pontoon
Arm backacter carries out mechanical whole slope, and limit is measured, the whole slope of machinery, limit, and both intert and carry out；For ensureing that geotechnique's cloth bag mixes under water
That coagulates soil charges quality, and part jackstone face need to backfill a small amount of sand or rubble is levelling, and sends whole slope under several diver's auxiliary water.
It is further used as preferred embodiment, in step 2) in, when sewing described geotechnique's cloth bag, each described geotextiles
The width of bag is 12 meters, along the sewing of its width every meter together, at this between suture geotechnique cloth bag surface layer and bottom between
Gap is the thickness of facing concrete.
It is further used as preferred embodiment, in step 3), lays geotechnique's cloth bag successively along water front construction direction, right
To sit in the right seat in the geotechnological cloth bag having special-shaped unit；The sewing of geotextiles is carried out on the coast, it is common that 5 geotechnological cloth bags of sewing it up
After pull 2 geotechnological cloth bags in water into so that it is its 3 geotechnological cloth bag spreads out to water intermediate cam shape from bank slope, geotechnique cloth bag overlap joint
Part is always positioned at waterborne；For prevent geotechnological cloth bag that water middle berth sets because of sluicing displacement or fold, on geotechnique cloth bag limit
Angle pressure sand bag, removes sand bag before charging concrete.
It is further used as preferred embodiment, sets along water front direction on outer about one meter of hole to bench edge distance geotechnique's cloth bag top line
5, position of stake, the spacing of each position is 1.5m, by chain block and fastener for connection in the poling cloth of geotechnique cloth bag upper end, with regulation
Dynamic tension during concrete filling.
Being further used as preferred embodiment, during charging, the geotechnological cloth bag being positioned at top, slope reserves 3%, makes this soil
At the end of the construction of work cloth bag, the upper end of geotechnique's cloth bag controls in design anchor ingot ditch.
Be further used as preferred embodiment, in step 4), when the system of mixing and stirring and concrete pump debugging in place good after,
The cooperation of Waterborne movable operation platform need to be set up charge.
Being further used as preferred embodiment, in step 5), the maximum particle of crushed stone of mixing concrete is less than
20mm, the mix slump is not less than 22cm, the ratio of mud 0.40～0.55, doping quantity of fly ash 15%～30%.
It is further used as preferred embodiment, in step 5), needs diver to coordinate when charging construction under water, diver
That is responsible for connecting geotechnique's cloth bag under water charges cuff and concrete pumping hose port, and tramps with one's feet and step on the geotechnological cloth bag watered
Face, the flow obstacle caused so that beneficially concrete overcomes local, deep-water pressure and basis whole slope uneven, it is ensured that concrete fills
Fill full and geotechnological cloth bag face smooth, and between pour, overlap joint is tight.
It is further used as preferred embodiment, during described diver operation under water, commanding's water on duty waterborne
Lower Special answering machine is got in touch therewith, accepts person on duty and constructs command.The detailed description of the invention of the present invention is as follows:
Owing to excessively adopting sand, the destruction such as bank and current scour compeled by river-bed deepened, deep trouth, causes river embankment and reservoir soil
Dam underwater portion is etched, scour, avalanche, levee toe and base of dam steepening, embankment and dam soil body stability decline, and jeopardize dykes and dams peace
Entirely, need to use mechanical property concrete good, resistance to erosion that dykes and dams underwater portion is carried out mask process.A kind of dykes and dams mix under water
Solidifying soil mask construction method by by having certain tensile strength, permeable geotextiles is sewn into geotechnique's cloth bag, bag a length of
Sub-bottom changes mask length under water and mask length sum waterborne, cell width is 12m, sews one along its width every meter
Road, the thickness that gap is facing concrete between surface layer and the bottom of geotechnique's cloth bag at this, make geotechnique's cloth bag fill concrete
After, thickness is generally uniform everywhere, becomes platy structure, reduces bulge phenomenon.Geotextiles can be polypropylene, acrylic, polypropylene etc.
Material.Work progress specifically includes that 1. base surface processes.Before making geotechnique's cloth bag, carry out offshore slope jackstone by ship, and right
Jackstone face flattens.Whole slope uses supersonic sounding, utilizes ultra-sonic depth finder to measure jackstone 1m × 1, riverbed m grid
Sectional drawing, then utilizes the seat long-armed backacter of 16m on large-scale flat pontoon to carry out mechanical whole slope, and limit is measured, limit machine
The whole slope of tool, both intert and carry out.Charging quality for ensure geotextiles bag concrete under water, part jackstone face need to backfill a small amount of sand
Or rubble is levelling, and send whole slope under several diver's auxiliary water.2. geotechnique's cloth bag sewing.To have certain tensile strength, permeable
Geotextiles be sewn into geotechnique cloth bag, the three side sealing of bag closes, an opening, a length of sub-bottom changes of bag mask length under water with
Mask length sum waterborne, width is 12m, and every meter of sewing is together in the width direction, at this between geotechnique's cloth bag surface layer and bottom
The thickness that gap is facing concrete, after making geotechnique's cloth bag fill concrete, thickness is generally uniform everywhere, reduces bulge existing
As.3. geotechnique's cloth bag is laid.Before geotechnique's cloth bag is laid, set up Waterborne movable in the both sides of construction part by large-scale flat pontoon
Operation platform, geotechnique's cloth bag is laid on Waterborne movable operation platform, and poling strap is laid in side, inside wears steel pipe, to geotextiles
Bag carries out guiding to be fixed with position, is then placed under water.Lay geotechnique's cloth bag by water front construction direction, have abnormity geotechnique's cloth bag
To sit in the right seat in position.With unit overlap joint cloth in the same direction, upstream is for laying initiating terminal in the program direction of general construction.The seam of geotextiles
System is carried out on the coast, it is common that 5 geotechnological cloth bag rear draggings of sewing it up enter 2 geotechnological cloth bags in water so that it is its 3 geotechnological cloth bag is from bank
Slope spreads out to water intermediate cam shape, and overlap is always positioned at waterborne.For preventing geotechnological cloth bag that water middle berth sets because of sluicing
Displacement or fold, at geotechnique cloth bag corner pressure sand bag, remove sand bag before charging concrete.Outside the line of hole to bench edge distance geotechnique's cloth bag top
About one meter sets 5, stake position (spacing 1.5m) along water front direction, with chain block and steel pipe connecting in the poling cloth of geotechnique cloth bag upper end
Connect, to regulate dynamic tension during concrete filling.Top, slope geotechnique's cloth bag reserves 3%, and at the end of making unit construction, upper end controls
In design anchor ingot ditch.4. concrete filling.It is one to pour unit, length that geotextiles bag concrete charges with water (flow) direction 12m
Being as the criterion with design length of grade, the cuff that charges of geotechnique's cloth bag sets one group every 5 m from bottom.At the system of mixing and stirring and concrete pump just
After position debugging is good, Waterborne movable operation platform need to be set up.Concrete filling construction uses pumping technology, by geotechnique's cloth bag end under water
End charges cuff to be carried out to direction waterborne successively.It is ensured that overlap closely between pour during construction, and upstream pour is being taken
The place of connecing pushes down downstream pour, and the nearlyer pour of offshore pushes down offshore pour farther out in lap-joint.Sleeve is charged from geotechnique's cloth bag
Mouth concrete pump injects high slump, self-flowing dense, without vibration, exempts from maintenance, the most scattered fill concrete, concrete
In geotechnique's cloth bag, flowing is filled, and extends and sprawls, be full of whole geotextiles under the Gravitative Loads of concrete in geotechnique's cloth bag
Bag, after concrete setting hardening, forms underwater concrete mask at predetermined design attitude, plays protection sub-bottom changes portion under water
The effect divided.The maximum particle of crushed stone of mixing concrete is less than 20mm, and the mix slump is not less than 22cm, the ratio of mud 0.40
～0.55, doping quantity of fly ash 15%～30%.Underwater construction needs diver to coordinate, and diver is responsible for connecting geotechnique's cloth bag under water and fills
Fill cuff and concrete pumping hose port, and tramp with one's feet and step on the geotechnological cloth bag face watered, overcome deep water with beneficially concrete
The flow obstacle that local, pressure and basis whole slope is uneven and causes, it is ensured that the full and geotechnological cloth bag face of concrete filling is smooth.Latent
During water person's operation under water, commanding on duty waterborne gets in touch therewith with Special answering machine under water, accepts person on duty's construction
Command.For strengthening construction safety, operating personnel must wear life jacket, and it is that diver blows newly that operation ship is joined Special air compressor
Fresh air.5. top, slope protection.After geotextiles bag concrete charges complete 24 hours and reaches design strength under water, can bear down on one
(or grappling ditch) concrete and the construction of toe jackstone presser feet.
Concrete mix parameter: water-cement ratio 0.40～0.55, sand coarse aggregate ratio 37%～42%, unit consumption of water 150kg/m3～
175 kg/m3, doping quantity of fly ash are 15%～the 30% of Binder Materials quality, retarding-type superplasticizer volume is Binder Materials matter
1.5%～the 2.5% of amount, underwater anti-washout agent is the 3%～5% of Binder Materials quality.Concrete slump is not less than 220mm, expands
Divergence is not less than 450mm.Cement type includes portland cement, Portland cement, pulverized fuel ash cement, slag cements, mixes
Cement, strength grade is preferably 42.5 and 42.5R, cement consumption the most preferably less than 350kg/m3.Use medium coarse sand, rubble or cobble
Maximum particle diameter is no more than 20mm.Flyash is I grade or II grade of F class flyash.Retarding-type superplasticizer includes naphthalene system or poly-
Carboxylic acid water reducing agent.This concrete uses retarding-type superplasticizer to increase substantially the workability of concrete, improves rheology
Characteristic, water consumption is low, the slump big, self-flowing dense, be full of the advantages such as geotechnique's cloth bag to make concrete have；Mix appropriate fine coal
Ash, can reduce unit consumption of water, improves the coherency of concrete, reduces isolation, can promote the durability of concrete simultaneously；Under water
Dispersant is not a kind of additive based on flocculant, by generating ionic bond or covalent bond with cement particle surface, plays
Compression double electric layer, absorption cement granules, the effect of protection cement, simultaneously between cement granules, between cement granules and aggregate, logical
Cross " crane span structure " effect of the high polymer long chain of flocculant, make mixture form stable spatial flexible network structure, improve and newly mix
The cohesiveness of concrete, it is to avoid the dispersion under water of fresh concrete, isolate and avoid cement to run off, it is achieved underwater construction land
Change.
It is above the better embodiment of the present invention is illustrated, but the invention is not limited to described reality
Executing example, those of ordinary skill in the art also can make all equivalent modifications on the premise of spirit of the present invention or replace
Changing, modification or the replacement of these equivalents are all contained in the application claim limited range.
Claims (10)
1. a dykes and dams underwater concrete mask construction method, it is characterised in that: comprise the following steps,
1), before making geotechnique cloth bag, carry out offshore slope jackstone by ship, and jackstone face is flattened；
2) by having certain tensile strength, permeable geotextiles be sewn into geotechnique's cloth bag, the three side sealing of building work bag closes, remaining
One opening, a length of sub-bottom changes of building work bag mask length under water and mask length sum waterborne；
3) setting up Waterborne movable operation platform in the both sides of construction part by large-scale flat pontoon, geotechnique's cloth bag is laid on waterborne
On mobile operation platform, lay poling strap in the side of building cloth bag and be positioned at the steel pipe of poling strap, by geotextiles
Bag is put under water, and lays geotechnique's cloth bag successively along water front construction direction；
4) in geotechnique's cloth bag, charge concrete, be one to pour unit with water (flow) direction 12m when charging, charge length to design slope
Length is as the criterion, and cuff every 5 m from bottom it that charge of geotechnique's cloth bag set one group；
5) concrete filling construction uses pumping technology, geotechnique's cloth bag be positioned at end under water and charge cuff successively to side waterborne
To carry out；Inject high slump, self-flowing dense, without vibration from the cuff concrete pump that charges of geotechnique's cloth bag, exempt from maintenance, under water
The most scattered fill concrete, concrete flowing in geotechnique's cloth bag is filled, at geotechnique's cloth bag under the Gravitative Loads of concrete
Middle extension is sprawled, and is full of whole geotechnique's cloth bag, after concrete setting hardening, forms underwater concrete at predetermined design attitude and protects
Face, plays the effect of protection sub-bottom changes underwater portion；
6) after complete 24 hours of the concrete filling in geotechnique's cloth bag under water, the concrete in geotechnique's cloth bag reaches design strength
After, can carry out bearing down on one or the concrete filling of grappling ditch, and carry out the construction of toe jackstone presser feet.
Dykes and dams underwater concrete mask construction method the most according to claim 1, it is characterised in that: in step 1),
Use supersonic sounding during whole slope, utilize ultra-sonic depth finder to measure jackstone 1m × 1, riverbed m grid sectional drawing, so
The rear utilization seat long-armed backacter of 16m on large-scale flat pontoon carries out mechanical whole slope, and limit is measured, the whole slope of machinery, limit, and two
Person is interspersed to be carried out；Charging quality for ensure geotextiles bag concrete under water, part jackstone face need to backfill a small amount of sand or rubble is looked for
Flat, and send whole slope under several diver's auxiliary water.
Dykes and dams underwater concrete mask construction method the most according to claim 1, it is characterised in that: in step 2) in, seam
When making described geotechnique's cloth bag, the width of each described geotechnique's cloth bag is 12 meters, along the sewing of its width every meter together, stitches at this
The thickness that gap is facing concrete between geotechnique's cloth bag surface layer and bottom at conjunction.
Dykes and dams underwater concrete mask construction method the most according to claim 1, it is characterised in that: in step 3), edge
Water front construction direction lays geotechnique's cloth bag successively, for there being the geotechnological cloth bag of special-shaped unit to sit in the right seat；The sewing of geotextiles
Carry out on the coast, it is common that 5 geotechnological cloth bag rear draggings of sewing it up enter 2 geotechnological cloth bags in water so that it is its 3 geotechnological cloth bag is from bank slope
Spreading out to water intermediate cam shape, the overlap of geotechnique's cloth bag is always positioned at waterborne；For prevent geotechnological cloth bag that water middle berth sets because of
Sluicing displacement or fold, at geotechnique cloth bag corner pressure sand bag, remove sand bag before charging concrete.
Dykes and dams underwater concrete mask construction method the most according to claim 1, it is characterised in that: in hole to bench edge distance geotextiles
Outer about one meter of bag top line sets 5, stake position along water front direction, and the spacing of each position is 1.5m, by chain block and geotextiles
Fastener for connection in the poling cloth of bag upper end, to regulate dynamic tension during concrete filling.
Dykes and dams underwater concrete mask construction method the most according to claim 1, it is characterised in that: during charging,
The geotechnological cloth bag being positioned at top, slope reserves 3%, and at the end of making the construction of this geotechnique's cloth bag, the upper end of geotechnique's cloth bag controls at design anchor ingot
In ditch.
Dykes and dams underwater concrete mask construction method the most according to claim 1, it is characterised in that: in step 4), when
Mix and stir system and concrete pump debugging in place good after, need to set up Waterborne movable operation platform coordinate charge.
Dykes and dams underwater concrete mask construction method the most according to claim 1, it is characterised in that: in step 5), mix
The maximum particle of crushed stone of concrete processed is less than 20mm, and the mix slump is not less than 22cm, the ratio of mud 0.40～0.55, fine coal
Ash volume 15%～30%.
Dykes and dams underwater concrete mask construction method the most according to claim 1, it is characterised in that: in step 5), water
Under need diver to coordinate when charging construction, diver be responsible under water connecting geotechnique's cloth bag charge cuff and concrete pumping is soft
The mouth of pipe, and tramp with one's feet and step on the geotechnological cloth bag face watered, overcome local, deep-water pressure and basis whole slope the most not with beneficially concrete
The flow obstacle put down and cause, it is ensured that the full and geotechnological cloth bag face of concrete filling is smooth, and between pour, overlap joint is tight.
10. according to the dykes and dams underwater concrete mask construction method described in claim 2 or 9, it is characterised in that: described diver
Under water during operation, commanding on duty waterborne gets in touch therewith with Special answering machine under water, accepts person on duty and constructs command.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106836116A (en) * | 2016-12-28 | 2017-06-13 | 宁波工程学院 | Drawing-type geomembrane enveloped concrete connects slope emergent Supply Pier and its construction method temporarily |
| CN110552324A (en) * | 2019-08-28 | 2019-12-10 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Side slope protection structure capable of underwater construction and construction method thereof |
| CN111206548A (en) * | 2020-02-14 | 2020-05-29 | 福建省水利水电工程局有限公司 | Horizontal construction method for underwater mould bag concrete |
| CN113062260A (en) * | 2021-03-29 | 2021-07-02 | 广州粤水建设有限公司 | Film bag laying method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836116A (en) * | 2016-12-28 | 2017-06-13 | 宁波工程学院 | Drawing-type geomembrane enveloped concrete connects slope emergent Supply Pier and its construction method temporarily |
| CN106836116B (en) * | 2016-12-28 | 2018-09-18 | 宁波工程学院 | Drawing-type geomembrane enveloped concrete connects slope emergent Supply Pier and its construction method temporarily |
| CN110552324A (en) * | 2019-08-28 | 2019-12-10 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Side slope protection structure capable of underwater construction and construction method thereof |
| CN111206548A (en) * | 2020-02-14 | 2020-05-29 | 福建省水利水电工程局有限公司 | Horizontal construction method for underwater mould bag concrete |
| CN111206548B (en) * | 2020-02-14 | 2021-08-31 | 福建省水利水电工程局有限公司 | Horizontal construction method for underwater mould bag concrete |
| CN113062260A (en) * | 2021-03-29 | 2021-07-02 | 广州粤水建设有限公司 | Film bag laying method |
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| CN105908676B (en) | 2018-11-20 |
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