CN107761737A - Based on the casting craft to underwater concrete - Google Patents
Based on the casting craft to underwater concrete Download PDFInfo
- Publication number
- CN107761737A CN107761737A CN201610678979.7A CN201610678979A CN107761737A CN 107761737 A CN107761737 A CN 107761737A CN 201610678979 A CN201610678979 A CN 201610678979A CN 107761737 A CN107761737 A CN 107761737A
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- Prior art keywords
- concrete
- mud
- conduit
- groove
- wall
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- 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
- E02D15/06—Placing concrete under water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0061—Production methods for working underwater
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The invention discloses a kind of casting craft based on to underwater concrete, clear bottom changes slurry and uses Dg100 air lifts, is suspended in midair by crane into groove, air compressor conveying compressed air, the native slag mud for being deposited on trench bottom is absorbed with mud crossover-circulating type method；It is shelved on and is led on wall using self-made clamp at the top of conduit, after conduit installs, checks mud balance, viscosity and wall bottom sediment thickness in groove；Inclinometer pipe is arranged in the middle position between two perfusion conduits of a groove section, scene is transported to by concrete waggon, concrete pump truck irrigates concrete, placing concrete starts within 4 hours after steel reinforcement cage enters groove, it should also be poured into a mould simultaneously after grooving in 8 hours, before rear box cut section carries out concrete cast, the attachment gelling thing on butt joint shaped steel surface is cleaned, concrete cast starts to stir for 3.5~4 hours after starting, the technique has carried out strict control for the process of casting concrete under water, so that concrete formation steady quality, it ensure that service life, building is safer.
Description
Technical field
The present invention relates to a kind of technique, more particularly, to a kind of casting craft based on to underwater concrete.
Background technology
Concrete refers to the general designation for the cementing integral engineered composite material that gathers materials by binder materials.Concrete is the present age
One of most important civil engineering material.It is by binder materials, granular aggregat（Also referred to as aggregate）, water, and if necessary
The additive and admixture of addition are prepared by a certain percentage, and through uniform stirring, closely knit shaping, one kind that maintenance hardening forms is manually
Stone material.Concrete has abundant raw material, cheap, the characteristics of simple production process, thus makes its dosage increasing.Simultaneously
The features such as concrete is also high with compression strength, good endurance, and strength grade scope is wide.These features make its use range very
Extensively, not only used in various civil engineerings, be exactly shipbuilding industry, mechanical industry, the exploitation of ocean, geothermal engineering etc., coagulation
Soil and important material, the most important performance of concrete mix.It is the denseness of its integrating representation mixture, mobility, plastic
Property, the performance of anti-laminated segregation bleeding and easy wiping one's face property etc..The method and index of measure and expression mixture workability are a lot, in
The slump (millimeter) and the dimension vigorous time with the vigorous instrument measure of dimension that state is mainly determined using truncated cone slump cylinder（Second）, as denseness
Leading indicator.Most important mechanical property after concrete hardening, refer to concrete resistance pressure, draw, energy that is curved, cutting iso-stress
Power.The ratio of mud, cement type and dosage, the kind gathered materials and dosage and stirring, shaping, maintenance, all directly affect concrete
Intensity.Concrete load or humiture effect under can be deformed, mainly including elastic deformation, plastic deformation, contraction and
Temperature deformation etc..Elastic deformation of the concrete under short time loading is mainly represented with modulus of elasticity.In general, mix
Solidifying soil has good durability.But in cold district, particularly at the engineering position of SEA LEVEL VARIATION and under water-saturated state
When being acted on by frequently alternate freezing and thawing, concrete is easily damaged.There is certain frost resistance requirement to concrete for this.For
During fluid-tight engineering, it is desirable to which concrete has good impermeability and corrosion resistance.Impermeability, frost resistance, corrosion resistance are
Concrete durability.
When tradition carries out concreting under water, because technological design is unreasonable, the concrete that causes to pour out it is strong
Degree and life-span are all affected, and the quality and safety for building all have hidden danger.
The content of the invention
During it is an object of the invention to overcome the above-mentioned existing concreting of progress under water, because technological design does not conform to
Reason, the intensity for the concrete for causing to pour out and life-span are all affected, and the quality and safety for building all have hidden danger
The problem of, devise a kind of casting craft based on to underwater concrete, process of the technique for casting concrete under water
Strict control is carried out so that concrete formation steady quality, ensure that service life, building is safer, solves existing
Have when carrying out concreting under water, because technological design is unreasonable, cause the intensity of concrete and the life-span poured out
All it is affected, the quality and safety for building all have the problem of hidden danger.
The purpose of the present invention is achieved through the following technical solutions：Based on the casting craft to underwater concrete, including it is following
Step：
（1）Slurry is changed at clear bottom：Clear bottom changes slurry and uses Dg100 air lifts, is suspended in midair by crane into groove, air compressor delivery pressure
Contracting air, the native slag mud for being deposited on trench bottom, and viscosity, proportion or silt content mistake in displacement slot are absorbed with mud crossover-circulating type method
Big mud, make full groove mud viscosity ＜ 25s, proportion 1.06 between 1.10g/cm3, silt content ＜ 4%, after meeting clear bottom
The quality requirement of mud；
（2）Downcomer：Conduit is formed using ф 250mm fastener for connection, using advance row watertight test, is used after qualified, is anti-
Only mud pours into conduit, and conduit bottom should be less than 3m away from 30~50cm of bottom land, conduit level interval, is more than 1.5m away from groove end,
Top is shelved on using self-made clamp and led on wall, after conduit installs, checks that mud balance, viscosity and wall bottom sediment are thick in groove
Degree, it is such as exceeded, carry out secondary clear bottom using conduit；
（3）Wall inclinometer pipe is buried：According to design and construction drawing requirement, inclinometer pipe, inclinometer pipe cloth are arranged in corresponding measuring frequency section
The middle position between two perfusion conduits of a groove section is put, so that inclinometer pipe is by uniform concrete impulse force and pressure, deviational survey
The embedded of pipe should complete before cast concrete after borehole cleaning is qualified in 2~3h；
（4）Bottling wall underwater concrete：The design grade of concrete is underwater C30, and concrete uses Commercial Concrete, and the slump of concrete is
18~22cm, scene is transported to by concrete waggon, concrete pump truck perfusion concrete, placing concrete is within 4 hours after steel reinforcement cage enters groove
Start, while should also be poured into a mould after grooving in 8 hours, prevent cell wall because of long-time immersion and shrinkage cavity, cave in, under concrete
φ 250 tremie of the material Jing Guo pressure test, conduit, which carries, pulls out, dismantles conduit uses crawler crane, placing concrete process
In, pipe laying depth is maintained at 1.5~3.0m, and in below 0.5m, wall top concreting face is higher than to be set concrete surface highness change
0.3~0.5m of absolute altitude is counted, ramming and curing concrete test block is sampled at the scene by regulation requirement, is up to curing age in time
Test block is delivered experiment station and done experiment；
（5）Joint quality controls：To pour the joint quality of groove Duan Yuxian connection-peg stakes after ensuring, prevent diaphram wall from leaking
Water phenomenon, before rear box cut section carries out concrete cast, attachment gelling thing that should be to joint-type steel surface is cleaned, and cleaning is adopted
With terminal bruss wall device, scavenging period is 15~20 minutes, untill terminal bruss is without mud；
（6）Joint case joint is promoted：Joint case is promoted to be combined with concrete cast, and concrete cast record is as the promotion joint case time
Foundation is controlled, according to the rule and Construction practices of Underwater Concrete setting rate, concrete cast starts to pull out for 3.5~4 hours or so after starting
Dynamic, its amplitude is not more than 10 centimetres, and, its amplitude is not more than 20 centimetres later lifting every 10~20 minutes once, observes joint
The sinking of case, 6~8 hours after concrete cast terminates, joint case is once all extracted and cleans in time and dredges work, finally
Obtain satisfactory concrete.
In summary, the beneficial effects of the invention are as follows：The technique has been carried out sternly for the process of casting concrete under water
The control of lattice so that concrete formation steady quality, ensure that service life, building is safer, solve it is existing under water
When carrying out concreting, because technological design is unreasonable, the intensity for the concrete for causing to pour out and life-span are all by shadow
Ring, the quality and safety for building all have the problem of hidden danger.
Embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to
This.
Embodiment：
Based on the casting craft to underwater concrete, comprise the following steps：
（1）Slurry is changed at clear bottom：Clear bottom changes slurry and uses Dg100 air lifts, is suspended in midair by crane into groove, air compressor delivery pressure
Contracting air, the native slag mud for being deposited on trench bottom, and viscosity, proportion or silt content mistake in displacement slot are absorbed with mud crossover-circulating type method
Big mud, make full groove mud viscosity ＜ 25s, proportion 1.06 between 1.10g/cm3, silt content ＜ 4%, after meeting clear bottom
The quality requirement of mud；
（2）Downcomer：Conduit is formed using ф 250mm fastener for connection, using advance row watertight test, is used after qualified, is anti-
Only mud pours into conduit, and conduit bottom should be less than 3m away from 30~50cm of bottom land, conduit level interval, is more than 1.5m away from groove end,
Top is shelved on using self-made clamp and led on wall, after conduit installs, checks that mud balance, viscosity and wall bottom sediment are thick in groove
Degree, it is such as exceeded, carry out secondary clear bottom using conduit；
（3）Wall inclinometer pipe is buried：According to design and construction drawing requirement, inclinometer pipe, inclinometer pipe cloth are arranged in corresponding measuring frequency section
The middle position between two perfusion conduits of a groove section is put, so that inclinometer pipe is by uniform concrete impulse force and pressure, deviational survey
The embedded of pipe should complete before cast concrete after borehole cleaning is qualified in 2~3h；
（4）Bottling wall underwater concrete：The design grade of concrete is underwater C30, and concrete uses Commercial Concrete, and the slump of concrete is
18~22cm, scene is transported to by concrete waggon, concrete pump truck perfusion concrete, placing concrete is within 4 hours after steel reinforcement cage enters groove
Start, while should also be poured into a mould after grooving in 8 hours, prevent cell wall because of long-time immersion and shrinkage cavity, cave in, under concrete
φ 250 tremie of the material Jing Guo pressure test, conduit, which carries, pulls out, dismantles conduit uses crawler crane, placing concrete process
In, pipe laying depth is maintained at 1.5~3.0m, and in below 0.5m, wall top concreting face is higher than to be set concrete surface highness change
0.3~0.5m of absolute altitude is counted, ramming and curing concrete test block is sampled at the scene by regulation requirement, is up to curing age in time
Test block is delivered experiment station and done experiment；
（5）Joint quality controls：To pour the joint quality of groove Duan Yuxian connection-peg stakes after ensuring, prevent diaphram wall from leaking
Water phenomenon, before rear box cut section carries out concrete cast, attachment gelling thing that should be to joint-type steel surface is cleaned, and cleaning is adopted
With terminal bruss wall device, scavenging period is 15~20 minutes, untill terminal bruss is without mud；
（6）Joint case joint is promoted：Joint case is promoted to be combined with concrete cast, and concrete cast record is as the promotion joint case time
Foundation is controlled, according to the rule and Construction practices of Underwater Concrete setting rate, concrete cast starts to pull out for 3.5~4 hours or so after starting
Dynamic, its amplitude is not more than 10 centimetres, and, its amplitude is not more than 20 centimetres later lifting every 10~20 minutes once, observes joint
The sinking of case, 6~8 hours after concrete cast terminates, joint case is once all extracted and cleans in time and dredges work, finally
Obtain satisfactory concrete.
The technique has carried out strict control for the process of casting concrete under water so that concrete formation quality is steady
It is fixed, service life is ensure that, building is safer, when solving the existing concreting of progress under water, due to technological design
Unreasonable, the intensity for the concrete for causing to pour out and life-span are all affected, and the quality and safety for building are all present
The problem of hidden danger.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to
Any simply modification, the equivalent variations substantially made according to the technology of the present invention, method to above example, each fall within the present invention
Protection domain within.
Claims (1)
1. based on the casting craft to underwater concrete, it is characterised in that comprise the following steps：
（1）Slurry is changed at clear bottom：Clear bottom changes slurry and uses Dg100 air lifts, is suspended in midair by crane into groove, air compressor delivery pressure
Contracting air, the native slag mud for being deposited on trench bottom, and viscosity, proportion or silt content mistake in displacement slot are absorbed with mud crossover-circulating type method
Big mud, make full groove mud viscosity ＜ 25s, proportion 1.06 between 1.10g/cm3, silt content ＜ 4%, after meeting clear bottom
The quality requirement of mud；
（2）Downcomer：Conduit is formed using ф 250mm fastener for connection, using advance row watertight test, is used after qualified, is anti-
Only mud pours into conduit, and conduit bottom should be less than 3m away from 30~50cm of bottom land, conduit level interval, is more than 1.5m away from groove end,
Top is shelved on using self-made clamp and led on wall, after conduit installs, checks that mud balance, viscosity and wall bottom sediment are thick in groove
Degree, it is such as exceeded, carry out secondary clear bottom using conduit；
（3）Wall inclinometer pipe is buried：According to design and construction drawing requirement, inclinometer pipe, inclinometer pipe cloth are arranged in corresponding measuring frequency section
The middle position between two perfusion conduits of a groove section is put, so that inclinometer pipe is by uniform concrete impulse force and pressure, deviational survey
The embedded of pipe should complete before cast concrete after borehole cleaning is qualified in 2~3h；
（4）Bottling wall underwater concrete：The design grade of concrete is underwater C30, and concrete uses Commercial Concrete, and the slump of concrete is
18~22cm, scene is transported to by concrete waggon, concrete pump truck perfusion concrete, placing concrete is within 4 hours after steel reinforcement cage enters groove
Start, while should also be poured into a mould after grooving in 8 hours, prevent cell wall because of long-time immersion and shrinkage cavity, cave in, under concrete
φ 250 tremie of the material Jing Guo pressure test, conduit, which carries, pulls out, dismantles conduit uses crawler crane, placing concrete process
In, pipe laying depth is maintained at 1.5~3.0m, and in below 0.5m, wall top concreting face is higher than to be set concrete surface highness change
0.3~0.5m of absolute altitude is counted, ramming and curing concrete test block is sampled at the scene by regulation requirement, is up to curing age in time
Test block is delivered experiment station and done experiment；
（5）Joint quality controls：To pour the joint quality of groove Duan Yuxian connection-peg stakes after ensuring, prevent diaphram wall from leaking
Water phenomenon, before rear box cut section carries out concrete cast, attachment gelling thing that should be to joint-type steel surface is cleaned, and cleaning is adopted
With terminal bruss wall device, scavenging period is 15~20 minutes, untill terminal bruss is without mud；
（6）Joint case joint is promoted：Joint case is promoted to be combined with concrete cast, and concrete cast record is as the promotion joint case time
Foundation is controlled, according to the rule and Construction practices of Underwater Concrete setting rate, concrete cast starts to stir for 3.5~4 hours after starting, its
Amplitude is not more than 10 centimetres, and, its amplitude is not more than 20 centimetres later lifting every 10~20 minutes once, observes under joint case
It is heavy, 6~8 hours after concrete cast terminates, joint case is once all extracted and cleans and dredge work in time, finally gives symbol
Close desired concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610678979.7A CN107761737A (en) | 2016-08-17 | 2016-08-17 | Based on the casting craft to underwater concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610678979.7A CN107761737A (en) | 2016-08-17 | 2016-08-17 | Based on the casting craft to underwater concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107761737A true CN107761737A (en) | 2018-03-06 |
Family
ID=61259803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610678979.7A Withdrawn CN107761737A (en) | 2016-08-17 | 2016-08-17 | Based on the casting craft to underwater concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107761737A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487921A (en) * | 2018-04-28 | 2018-09-04 | 淮北矿业股份有限公司 | One kind being used for underground coal mine large-section underground continuous concrete device and its casting method |
| CN114791375A (en) * | 2022-05-04 | 2022-07-26 | 浙江致远工程管理有限公司 | Intelligent equipment for building material inspection |
-
2016
- 2016-08-17 CN CN201610678979.7A patent/CN107761737A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487921A (en) * | 2018-04-28 | 2018-09-04 | 淮北矿业股份有限公司 | One kind being used for underground coal mine large-section underground continuous concrete device and its casting method |
| CN114791375A (en) * | 2022-05-04 | 2022-07-26 | 浙江致远工程管理有限公司 | Intelligent equipment for building material inspection |
| CN114791375B (en) * | 2022-05-04 | 2022-10-04 | 浙江致远工程管理有限公司 | Intelligent equipment for building material inspection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180306 |
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| WW01 | Invention patent application withdrawn after publication |