CN107386195A - A kind of Dredging Construction method for the canal that drains off floodwaters - Google Patents
A kind of Dredging Construction method for the canal that drains off floodwaters Download PDFInfo
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- CN107386195A CN107386195A CN201710821194.5A CN201710821194A CN107386195A CN 107386195 A CN107386195 A CN 107386195A CN 201710821194 A CN201710821194 A CN 201710821194A CN 107386195 A CN107386195 A CN 107386195A
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- 238000010276 construction Methods 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000001556 precipitation Methods 0.000 claims abstract description 27
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 10
- 231100000719 pollutant Toxicity 0.000 claims abstract description 10
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000004062 sedimentation Methods 0.000 claims description 58
- 229910001385 heavy metal Inorganic materials 0.000 claims description 27
- 238000005189 flocculation Methods 0.000 claims description 14
- 230000016615 flocculation Effects 0.000 claims description 14
- 239000003381 stabilizer Substances 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 12
- 230000007613 environmental effect Effects 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 229920000592 inorganic polymer Polymers 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000013535 sea water Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 229920000620 organic polymer Polymers 0.000 claims description 5
- 238000009790 rate-determining step (RDS) Methods 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 claims description 4
- 239000004700 high-density polyethylene Substances 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 239000004575 stone Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of Dredging Construction method for the canal that drains off floodwaters, and from upstream to downstream channel is divided into three construction sections and including following process：First construction section and the desilting process of second segment construction section, the desilting process of the 3rd construction section, dredging residual water precipitation process process and marine stockyard antiseepage process；When carrying out the desilting process of the first construction section and second segment construction section, using environment-protective desilting and using customizing, small-sized strand inhales ship and 4010 types twist and inhale ship construction；When carrying out the desilting process of the 3rd section of construction section, using draining desilting and slush pump is constructed；When carrying out dredging residual water precipitation process process, dredging residual water precipitation process is carried out using two-stage flocculence；Side slope surface is anti-when carrying out marine stockyard antiseepage process, including in the cofferdam of stockyard blends the antiseepage of stockyard bottom surface.The Dredging Construction method of the canal that drains off floodwaters of the present invention not only solves alluvial problem, moreover it is possible to removes the pollutant in bed mud, is laid the first stone further to implement Ecological Restoration Project.
Description
Technical field
The present invention relates to a kind of Dredging Construction method for the canal that drains off floodwaters.
Background technology
The canal that drains off floodwaters is to prevent flood damage and the irrigation canals and ditches built, and flood discharge work can be played when running into flood damage
With the ability of flood infringement is resisted in raising.But because the sanitary sewage in village along the line is directly discharged into canal, cause water quality
Deterioration forms black and odorous water, and the alluvial of canal bottom is serious, and surrounding cities environment and nearby residents life are made a big impact, also make canal
The original flood of regulating and storing in road has weakened with the ability prevented and reduced natural disasters.To slow down alluvial, extend the life-span for the canal that drains off floodwaters, it is necessary to right
The canal that drains off floodwaters is renovated, and regulation point cuts three steps of dirty, desilting and restoration of the ecosystem and carried out, and wherein desilting is exactly one critically important
Step, it can be such that channel aggradation is improved well, so as not to run into extraodinary flood often can not timely flood discharge, two sides are caused
Economic loss.
The content of the invention
The defects of it is an object of the invention to overcome prior art and a kind of Dredging Construction method for the canal that drains off floodwaters is provided, it is not
It address only alluvial problem, moreover it is possible to remove the pollutant in bed mud, laid the first stone further to implement Ecological Restoration Project.
The object of the present invention is achieved like this：A kind of Dredging Construction method for the canal that drains off floodwaters, by channel from upstream to downstream
It is divided into three construction sections, the channel width of the first construction section and the second construction section is 80~90mm, and the channel of the 3rd construction section is wide
Spend for 50~60mm；One c-type sedimentation basin and a Type B sedimentation basin are set in the middle part north side of the second construction section, precipitated in Type B
The northwest side in pond sets the first marine stockyard, an A types sedimentation basin I is also set up on the first marine stockyard, in the 3rd construction section
Middle part north side set one and receive mud sump and the second marine stockyard, an A types sedimentation basin II is also provided with the second marine stockyard；
The construction method includes following process：The desilting process of first construction section and second segment construction section, the 3rd construction
Desilting process, dredging residual water precipitation process process and the marine stockyard antiseepage process of section；
When carrying out the desilting process of the first construction section and second segment construction section, using environment-protective desilting and using customizing small-sized strand
Inhale ship and 4010 types twist and inhale ship construction, comprise the following steps：
1) construct depth of water rate-determining steps, in direction and vertical channel of the tail end along channel of the second construction section of the canal that drains off floodwaters
Direction one interim easy movable gear lock is set respectively, make the depth of water of the first construction section and second segment construction section be
2.0m；
2) pipe installation step, the caliber for customizing the discharge pipeline that small-sized strand inhales ship are D300mm, and 4010 types twist the row for inhaling ship
The caliber of mud pipe is D400mm；Customize the discharge pipeline that small-sized strand inhales ship waterborne section is to use float tube mode along the center line of channel
Arrangement, wear mode under the land section use for the discharge pipeline for customizing small-sized strand suction ship and pass through access c-type sedimentation basin after the road of land；
The discharge pipeline that 4010 types twist suction ship is laid between c-type sedimentation basin and the first marine stockyard；
3) preceding measuring process is dredged, is surveyed using the real time kinematic survey system based on carrier phase observation data and the low-and high-frequency depth of water
Amount technology carries out dredging preceding measurement；
4) remove obstacles step, channel removed obstacles using excavator waterborne, ensure to customize small-sized strand inhale the construction of ship can be just
Often carry out；
5) heavy metal pollution step is handled in advance, by the way of physical treatment and chemical treatment are combined；Physical treatment
When, first pass through slush pump and the canal bottom mud of the canal bottom mud in heavy metal pollution section and uncontaminated section of heavy metal is blown to close to the
The broad water surface of two sections of construction section tail ends is mixed, then attached to the first marine stockyard by customizing small-sized strand suction ship strand suction after-blow
Near storage mud pit；During chemical treatment, test section of the segment length for 100m is first selected in the heavy metal pollution section of channel, is being tried
Test and heavy metal stabilizer is launched in section, sufficiently stirred with canal bottom mud, heavy metal stabilizer is determined most by detection
Good injected volume；The depth of water in channel is controlled again and in 20cm, uses the manually 7% heavy metal stabilization by weight for mud weight
Agent is carried to excavator waterborne, is shed by excavator waterborne, then with excavator by canal bottom mud and heavy metal stabilizer
Tentatively stirred；
6) environmental dredging step, constructed using the horizontal digging method of spud carriage, and subregion, slitting, construction in layer, use simultaneously
Real time kinematic survey system and computer aided system real-time display based on carrier phase observation data customize small-sized strand and inhale ship
Position；The chip formation mud for the environmentally friendly reamer that channel mud passes through on the small-sized strand suction ship of customization is simultaneously defeated by waterborne section of discharge pipeline
C-type sedimentation basin is delivered to, then the first marine stockyard reclamation by pumping filling is delivered to by the discharge pipeline of 4010 types strand suction ship；It is small-sized customizing
When twisting suction ship dredging, canal bottom mud is stirred again with heavy metal stabilizer；
When carrying out the desilting process of the 3rd section of construction section, using desilting is drained and slush pump is constructed, comprise the following steps：
1) pipe installation step, the caliber of the discharge pipeline of slush pump is D200mm, and mode is worn under and passes through land road
The second marine stockyard is accessed afterwards；
2) preceding measuring process is dredged, carries out dredging preceding measurement using the real time kinematic survey system based on carrier phase observation data；
3) channel drain step, the gate that the 3rd construction section is located end to end is closed before constructing, by pumping for water pump, makes the 3rd to apply
Workshop section possesses the condition of dry pool construction；
4) slush pump construction procedure, laying drainage pipe is carried out successively, silt is taken out in silt processed, is delivered to the second marine stockyard；Apply
Water used in work process high-pressure gun passes through tail water pumping and seawater；
When carrying out dredging residual water precipitation process process, dredging residual water precipitation process is carried out using two-stage flocculence, i.e., first led to
Cross 4010 types and twist and inhale the discharge pipeline of ship loose mud is delivered to A types sedimentation basin I on the first marine stockyard, and twisted in 4010 types
The discharge pipeline for inhaling ship adds flocculant in the mud mouth position of A types sedimentation basin I, to accelerate the effective of mud in A types sedimentation basin I to sink
Form sediment, then the remaining water after flocculation is drained into Type B sedimentation basin, add flocculant again in Type B sedimentation basin, then will be precipitated in Type B
Water in pond after secondary precipitation is discharged into the upstream of channel；Similarly, loose mud is delivered to by the discharge pipeline of slush pump
A types sedimentation basin II on two marine stockyards, and add flocculation in the mud mouth position of A types sedimentation basin II in the discharge pipeline of slush pump
Agent, to accelerate effective precipitation of mud in A types sedimentation basin II, then the remaining water after flocculation drained into and receives mud sump, received in mud sump again
Secondary addition flocculant, then the water in mud sump after secondary precipitation will be being received as water used in giant；
Side slope surface is anti-when carrying out marine stockyard antiseepage process, including in the cofferdam of stockyard blends the antiseepage of stockyard bottom surface；Side slope
Interior domatic leakage preventing structure is followed successively by cofferdam sand filling bag, 2.0mm HDPE geomembranes, 500mm bagged sands mask one from outside to inside
Layer；The leakage preventing structure of stockyard bottom surface is followed successively by ramming bottom surface, 2.0mmHDPE geomembranes, 300mm back-up sand layers from the bottom to top.
Above-mentioned canal Dredging Construction method of drainning off floodwaters, wherein, the desilting process of the first construction section of progress and second segment construction section
The construction depth of water rate-determining steps when, by setting water return pipeline between the first marine stockyard and Type B sedimentation basin, by hydraulic reclamation backwater
Type B sedimentation basin is introduced, then is lifted by elevator pump and is discharged into the first construction section and the second construction section along backwater circulation pipeline；It is full
Foot customizes small-sized strand and inhales the requirement of ship working water level, and construction period supplements the first construction section and second according to field condition extracting seawater
The water level of construction section.
Above-mentioned canal Dredging Construction method of drainning off floodwaters, wherein, the desilting process of the first construction section of progress and second segment construction section
In dredge before measuring process and when carrying out measuring process before dredging in the desilting process of the 3rd section of construction section, including measurement channel bottom
Whether the shape facility of bed, and to channel substrate sludge sampling, the characteristics of analyzing pollutant in channel bed mud and pollutant exceed ring
Border quality standard.
Above-mentioned canal Dredging Construction method of drainning off floodwaters, wherein, the desilting process of the first construction section of progress and second segment construction section
Environmental dredging step when, one relay pump is set at interval of 800m on the discharge pipeline waterborne.
Above-mentioned canal Dredging Construction method of drainning off floodwaters, wherein, when carrying out dredging residual water precipitation process process, flocculant, which uses, to be had
The mixed flocculation agent that machine high polymer coagulant is made into inorganic polymer flocculant, that is, use polyacrylamide as organic polymer
Flocculant, aluminium polychloride is as inorganic polymer flocculation aid, and add flocculant of the match ratio as residual water treatment, volume is every
10~20 kilograms of water more than kiloton.
Above-mentioned canal Dredging Construction method of drainning off floodwaters, wherein, when carrying out marine stockyard antiseepage process, in the A types sedimentation basin I
Earth embankment is built temporarily with A types sedimentation basin II, to be formed every the ridge, the breach interlaced arrangement every the ridge, makes mud from mud discharging mouth to water-break
There is a sinuous flow channel between mouthful, increase the length of drainage path, to control the precipitation of muddy water.
The Dredging Construction method of the canal that drains off floodwaters of the present invention has the characteristics that：Used in the first construction section and the second construction section
The dredging mode of environment-protective desilting, in the 3rd construction section using the dredging method that desilting is combined is drained, the canal desilting that makes to drain off floodwaters is to one
Fixed canal bottom absolute altitude, and by dredging residual water two-stage precipitation treatment process, make to be expelled back into after tail water is up to standard and drain off floodwaters in canal, fully hair
Wave tail water effect.The restorative procedure being also combined by physics and chemistry has administered a huge sum of money for the first construction section and the second construction section
Category pollution, the section is administered to defined standard, unified to be delivered to Eco-Island by twisting suction ship, plays environmental protection and saving fund
Purpose.
Brief description of the drawings
Fig. 1 is the flow chart of the Dredging Construction method of the canal that drains off floodwaters of the present invention；
Fig. 2 is the plan using the canal that drains off floodwaters involved by the Dredging Construction method of the canal that drains off floodwaters of the present invention；
Fig. 3 is the stockyard side for carrying out being formed after marine stockyard antiseepage process in the Dredging Construction method of the canal that drains off floodwaters of the present invention
Slope is domatic with place bottom surface leakage preventing structure figure.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 and Fig. 2 are referred to, a kind of Dredging Construction method of canal that drains off floodwaters of the invention, channel is divided from upstream to downstream
Into three construction sections, the channel width of the first construction section 10 and the second construction section 20 is 80~90mm, length be respectively 0.6km and
2.34km；The channel width of 3rd construction section 30 is 50~60mm, length 1.98km；In the middle part north side of the second construction section 20
One c-type sedimentation basin 1 and a Type B sedimentation basin 2 are set, first marine stockyard 40 is set in the northwest side of Type B sedimentation basin 2, should
An A types sedimentation basin I 400 is also set up on first marine stockyard 40, setting one in the middle part north side of the 3rd construction section 30 receives mud
3 and second marine stockyard 50 of pond, an A types sedimentation basin II 500 is also provided with the second marine stockyard 50；
The construction method of the present invention includes following process：The desilting process of first construction section and second segment construction section, the 3rd
Desilting process, dredging residual water precipitation process process and the marine stockyard antiseepage process of construction section.
When carrying out the desilting process of the first construction section and second segment construction section, using environment-protective desilting and using customizing small-sized strand
Inhale ship and 4010 types twist and inhale ship construction, comprise the following steps：
1) construct depth of water rate-determining steps, in direction and vertical canal of the tail end along channel of the second construction section 20 of the canal that drains off floodwaters
The direction in road sets an interim easy movable gear lock respectively, and by the first marine stockyard 40 and Type B sedimentation basin 2 it
Between water return pipeline 21 is set, hydraulic reclamation backwater is introduced into Type B sedimentation basin 2, then lifted by elevator pump and along backwater circulation pipeline 22
The first construction section 10 and the second construction section 20 are discharged into, it is 2.0m to make the depth of water of the first construction section 10 and second segment construction section 20；For
Meet that customizing small-sized strand inhales the requirement of ship working water level, construction period supplements the He of the first construction section 10 according to field condition extracting seawater
The water level of second construction section 20.
2) pipe installation step, because the first construction section and second segment construction section channel are wider, therefore it is small-sized using customizing
Twist and inhale ship desilting；The caliber for customizing the discharge pipeline that small-sized strand inhales ship is D300mm, and the caliber that 4010 types twist the discharge pipeline for inhaling ship is
D400mm；Customize the discharge pipeline that small-sized strand inhales ship waterborne section 11 is to be arranged along the center line of channel using float tube mode, customization
The land section 12 of the discharge pipeline of small-sized strand suction ship wears mode and passes through access c-type sedimentation basin 1 after the road of land under using；4010 types twist
The discharge pipeline 13 for inhaling ship is laid between 1 and first marine stockyard 40 of c-type sedimentation basin；
3) preceding measuring process is dredged, using real time kinematic survey system RTK-DGPS and height based on carrier phase observation data
Frequency water-depth measurement technology carries out dredging preceding measurement, includes the shape facility of measurement channel bottom, and to channel substrate sludge sampling, analyzes canal
In road bed mud the characteristics of pollutant and whether pollutant exceedes environmental quality standards；
4) remove obstacles step, channel removed obstacles using excavator waterborne, ensure to customize small-sized strand inhale the construction of ship can be just
Often carry out；
5) heavy metal pollution step is handled in advance, by the way of physical treatment and chemical treatment are combined；Physical treatment
When, first pass through slush pump and the canal bottom mud of the canal bottom mud in heavy metal pollution section and uncontaminated section of heavy metal is blown to close to the
The broad water surface of two sections of tail ends of construction section 20 is mixed, then inhales after-blow to the first marine stockyard by customizing small-sized strand and inhaling ship and twist
Storage mud pit near 40；During chemical treatment, test section of the segment length for 100m is first selected in the heavy metal pollution section of channel,
Heavy metal stabilizer is launched in test section, is sufficiently stirred with canal bottom mud, heavy metal stabilizer is determined by detection
Optimal injected volume；The depth of water in channel is controlled in 20cm again, uses 7% heavy metal manually by weight for mud weight
Stabilizer is carried to excavator waterborne, is shed by excavator waterborne, then with excavator that canal bottom mud and heavy metal is steady
Determine agent tentatively to be stirred；
6) environmental dredging step, constructed using the horizontal digging method of spud carriage, and subregion, slitting, construction in layer, use simultaneously
Real time kinematic survey system RTK-DGPS and the customization of computer aided system real-time display based on carrier phase observation data are small-sized
Twist the position for inhaling ship；The chip that channel mud inhales the environmentally friendly reamer on ship by customizing small-sized strand forms mud and passes through waterborne section
Discharge pipeline is delivered to c-type sedimentation basin 1, then is twisted by 4010 types and to inhale the discharge pipeline of ship and be delivered to the first marine hydraulic reclamation of stockyard 40 and make
Ground；When customizing small-sized strand suction ship dredging, canal bottom mud is stirred again with heavy metal stabilizer；Due to customizing small-sized strand
It is smaller to inhale ship tonnage, blows away from about 800m, therefore a relay pump need to be set at interval of 800m or so on waterborne section of discharge pipeline.
When carrying out the desilting process of the 3rd section of construction section, using desilting is drained and slush pump is constructed, comprise the following steps：
1) pipe installation step, constructed because the channel of the 3rd section of construction section is narrower, therefore using slush pump；Slush pump
The caliber of discharge pipeline 14 is D200mm, and mode is worn under through the second marine stockyard 50 of access after the road of land；
2) preceding measuring process is dredged, is dredged using the real time kinematic survey system RTK-DGPS based on carrier phase observation data
Preceding measurement, include the shape facility of measurement channel bottom, and to channel substrate sludge sampling, the characteristics of analyzing pollutant in channel bed mud
And whether pollutant exceedes environmental quality standards；
3) channel drain step, the gate that the 3rd construction section 30 is located end to end is closed before constructing, by pumping for water pump, makes the 3rd
Construction section 30 possesses the condition of dry pool construction；
4) slush pump construction procedure, laying drainage pipe 15 is carried out successively, silt processed takes out silt, is delivered to the second marine stockyard
50；Water used in work progress high-pressure gun passes through tail water pumping and seawater.
When carrying out dredging residual water precipitation process process, dredging residual water precipitation process is carried out using two-stage flocculence, i.e., first led to
Cross 4010 types and twist and inhale the discharge pipeline of ship loose mud is delivered to A types sedimentation basin I 400 on the first marine stockyard 40, and
The discharge pipeline that 4010 types twist suction ship adds flocculant in the mud mouth position of A types sedimentation basin I 400, to accelerate A types sedimentation basin I 400
Effective precipitation of middle mud, then the remaining water after flocculation is drained into Type B sedimentation basin 2, flocculant is added again in Type B sedimentation basin 2,
Then water after the secondary precipitation in Type B sedimentation basin 2 is discharged into the upstream of channel；Similarly, will by the discharge pipeline of slush pump
Loose mud is delivered to the A types sedimentation basin II 500 on the second marine stockyard 50, and slush pump discharge pipeline in A type sedimentation basins
II 500 mud mouth position addition flocculant, to accelerate effective precipitation of the mud of A types sedimentation basin II 500, then by more than after flocculation
Water, which drains into, receives mud sump 3, adds flocculant again receiving mud sump 3, then will receive the water in mud sump 3 after secondary precipitation as high pressure
Water used in hydraulic giant；The mixed flocculation agent that flocculant is made into using organic polymer coargulator with inorganic polymer flocculant, that is, adopt
Be organic polymer coargulator with polyacrylamide, aluminium polychloride as inorganic polymer flocculation aid, match ratio be used as more than water
Processing adds flocculant, and volume is 10~20 kilograms of water more than every kiloton.
Side slope surface is anti-when carrying out marine stockyard antiseepage process, including in the cofferdam of stockyard blends the antiseepage of stockyard bottom surface；Side slope
Interior domatic leakage preventing structure is followed successively by cofferdam sand filling bag, 2.0mm HDPE geomembranes, 500mm bagged sands mask one from outside to inside
Layer；The leakage preventing structure of stockyard bottom surface is followed successively by ramming bottom surface, 2.0mmHDPE geomembranes, 300mm back-up sand layers (see figure from the bottom to top
3).Earth embankment can also be built temporarily in stockyard, to be formed every the ridge, the breach interlaced arrangement every the ridge, make mud from mud discharging mouth to water-break
There is a sinuous flow channel between mouthful, increase the length of drainage path, to control the precipitation of muddy water.
Above example is used for illustrative purposes only, rather than limitation of the present invention, the technology people about technical field
Member, without departing from the spirit and scope of the present invention, can also make various conversion or modification, therefore all equivalent
Technical scheme should also belong to scope of the invention, should be limited by each claim.
Claims (6)
1. a kind of Dredging Construction method for the canal that drains off floodwaters, channel is divided into three construction sections from upstream to downstream, the first construction section and
The channel width of second construction section is 80~90mm, and the channel width of the 3rd construction section is 50~60mm；In the second construction section
Middle part north side sets a c-type sedimentation basin and a Type B sedimentation basin, and the first marine stockyard is set in the northwest side of Type B sedimentation basin,
An A types sedimentation basin I is also set up on the first marine stockyard, sets one to receive mud sump and the in the middle part north side of the 3rd construction section
Two marine stockyards, an A types sedimentation basin II is also provided with the second marine stockyard；Characterized in that, the construction method includes
Following process：First construction section and the desilting process of second segment construction section, the desilting process of the 3rd construction section, dredging residual water precipitation
Treatment process and marine stockyard antiseepage process；Wherein,
When carrying out the desilting process of the first construction section and second segment construction section, ship is inhaled using environment-protective desilting and using small-sized strand is customized
Twisted with 4010 types and inhale ship construction, comprised the following steps：
1) construct depth of water rate-determining steps, in the side in direction and vertical channel of the tail end along channel of the second construction section of the canal that drains off floodwaters
To an interim easy movable gear lock is set respectively, it is 2.0m to make the depth of water of the first construction section and second segment construction section；
2) pipe installation step, the caliber for customizing the discharge pipeline that small-sized strand inhales ship are D300mm, and 4010 types twist the discharge pipeline for inhaling ship
Caliber be D400mm；Customize the discharge pipeline that small-sized strand inhales ship waterborne section is to use float tube mode cloth along the center line of channel
Put, wearing mode under the land section use for the discharge pipeline for customizing small-sized strand suction ship passes through access c-type sedimentation basin after the road of land；4010
The discharge pipeline that type twists suction ship is laid between c-type sedimentation basin and the first marine stockyard；
3) preceding measuring process is dredged, using the real time kinematic survey system based on carrier phase observation data and low-and high-frequency water-depth measurement skill
Art carries out dredging preceding measurement；
4) remove obstacles step, channel is removed obstacles using excavator waterborne, ensureing to customize small-sized strand and inhaling the construction of ship normally to enter
OK；
5) heavy metal pollution step is handled in advance, by the way of physical treatment and chemical treatment are combined；During physical treatment, first
The canal bottom mud of the canal bottom mud in heavy metal pollution section and uncontaminated section of heavy metal is blown to close to second segment by slush pump
The broad water surface of construction section tail end is mixed, then inhales after-blow near the first marine stockyard by customizing small-sized strand and inhaling ship and twist
Store up mud pit；During chemical treatment, test section of the segment length for 100m is first selected in the heavy metal pollution section of channel, in test section
Interior dispensing heavy metal stabilizer, sufficiently stirred with canal bottom mud, the optimal throwing of heavy metal stabilizer is determined by detection
High-volume；The depth of water in channel is controlled in 20cm again, uses and manually removes weight for 7% heavy metal stabilizer of mud weight
Excavator waterborne is transported to, is shed by excavator waterborne, is then carried out canal bottom mud and heavy metal stabilizer with excavator
Preliminary stirring；
6) environmental dredging step, constructed using the horizontal digging method of spud carriage, and subregion, slitting, construction in layer, while use and be based on
The real time kinematic survey system and computer aided system real-time display of carrier phase observation data customize the position that small-sized strand inhales ship；
The chip that channel mud inhales the environmentally friendly reamer on ship by customizing small-sized strand forms mud and is delivered to C by waterborne section of discharge pipeline
Type sedimentation basin, then the first marine stockyard reclamation by pumping filling is delivered to by the discharge pipeline of 4010 types strand suction ship；Inhaled customizing small-sized strand
When ship is dredged, canal bottom mud is stirred again with heavy metal stabilizer；
When carrying out the desilting process of the 3rd section of construction section, using desilting is drained and slush pump is constructed, comprise the following steps：
1) pipe installation step, the caliber of the discharge pipeline of slush pump is D200mm, and mode is worn under and is followed by through land road
Enter the second marine stockyard；
2) preceding measuring process is dredged, carries out dredging preceding measurement using the real time kinematic survey system based on carrier phase observation data；
3) channel drain step, the gate that the 3rd construction section is located end to end is closed before constructing, by pumping for water pump, makes the 3rd construction section
Possesses the condition of dry pool construction；
4) slush pump construction procedure, laying drainage pipe is carried out successively, silt is taken out in silt processed, is delivered to the second marine stockyard；Constructed
Water used in journey high-pressure gun passes through tail water pumping and seawater；
When carrying out dredging residual water precipitation process process, dredging residual water precipitation process is carried out using two-stage flocculence, that is, first passed through
Loose mud is delivered to the A types sedimentation basin I on the first marine stockyard by the discharge pipeline of 4010 types strand suction ship, and twists and inhale in 4010 types
The discharge pipeline of ship adds flocculant in the mud mouth position of A types sedimentation basin I, to accelerate the effective of mud in A types sedimentation basin I to sink
Form sediment, then the remaining water after flocculation is drained into Type B sedimentation basin, add flocculant again in Type B sedimentation basin, then will be precipitated in Type B
Water in pond after secondary precipitation is discharged into the upstream of channel；Similarly, loose mud is delivered to by the discharge pipeline of slush pump
A types sedimentation basin II on two marine stockyards, and add flocculation in the mud mouth position of A types sedimentation basin II in the discharge pipeline of slush pump
Agent, to accelerate effective precipitation of mud in A types sedimentation basin II, then the remaining water after flocculation drained into and receives mud sump, received in mud sump again
Secondary addition flocculant, then the water in mud sump after secondary precipitation will be being received as water used in giant；
Side slope surface is anti-when carrying out marine stockyard antiseepage process, including in the cofferdam of stockyard blends the antiseepage of stockyard bottom surface；Side slope inner slope
The leakage preventing structure in face is followed successively by cofferdam sand filling bag, 2.0mm HDPE geomembranes, one layer of 500mm bagged sands mask from outside to inside；
The leakage preventing structure of stockyard bottom surface is followed successively by ramming bottom surface, 2.0mm HDPE geomembranes, 300mm back-up sand layers from the bottom to top.
2. canal Dredging Construction method according to claim 1 of drainning off floodwaters, it is characterised in that carry out the first construction section and second segment
During the construction depth of water rate-determining steps of the desilting process of construction section, by being set back between the first marine stockyard and Type B sedimentation basin
Waterpipe, hydraulic reclamation backwater is introduced into Type B sedimentation basin, then lifted by elevator pump and be discharged into the first construction section along backwater circulation pipeline
With the second construction section；The requirement of ship working water level is inhaled to meet to customize small-sized strand, construction period mends according to field condition extracting seawater
Fill the water level of the first construction section and the second construction section.
3. canal Dredging Construction method according to claim 1 of drainning off floodwaters, it is characterised in that carry out the first construction section and second segment
Preceding measuring process is dredged in the desilting process dredged preceding measuring process and carry out the 3rd section of construction section in the desilting process of construction section
When, include the shape facility of measurement channel bottom, and to channel substrate sludge sampling, the characteristics of analyzing pollutant in channel bed mud and
Whether pollutant exceedes environmental quality standards.
4. canal Dredging Construction method according to claim 1 of drainning off floodwaters, it is characterised in that carry out the first construction section and second segment
During the environmental dredging step of the desilting process of construction section, one relay pump is set at interval of 800m on the discharge pipeline waterborne.
5. canal Dredging Construction method according to claim 1 of drainning off floodwaters, it is characterised in that carry out dredging residual water place of settling science and engineering
During sequence, flocculant uses the mixed flocculation agent that organic polymer coargulator is made into inorganic polymer flocculant, i.e., using poly- third
Acrylamide is organic polymer coargulator, and aluminium polychloride is as inorganic polymer flocculation aid, and match ratio is as residual water treatment
Flocculant is added, volume is 10~20 kilograms of water more than every kiloton.
6. canal Dredging Construction method according to claim 1 of drainning off floodwaters, it is characterised in that carry out marine stockyard antiseepage process
When, earth embankment is built temporarily in the A types sedimentation basin I and A types sedimentation basin II, to be formed every the ridge, the breach interlaced arrangement every the ridge, is made
Mud increases the length of drainage path, to control muddy water from mud discharging mouth to there is a sinuous flow channel between withdrawal nozzle
Precipitation.
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| CN108978577A (en) * | 2018-07-27 | 2018-12-11 | 中交天航港湾建设工程有限公司 | The construction method of irrigation canals and ditches bed mud dredging is carried out based on hydraulicking filling geotextile tube bag |
| CN109056761A (en) * | 2018-08-17 | 2018-12-21 | 上海宝冶集团有限公司 | Channel cleanout method |
| CN109518744A (en) * | 2018-11-14 | 2019-03-26 | 天津中海水利水电工程有限公司 | A kind of construction method of cutter suction dredger dredging |
| CN109881645A (en) * | 2019-04-22 | 2019-06-14 | 江苏东方生态清淤工程有限公司 | A kind of the disappear field of force and its setting method for geomembrane mud-dumping yard hydraulic reclamation mouth |
| CN116623702A (en) * | 2020-07-28 | 2023-08-22 | 中交路桥华南工程有限公司 | Construction method of underwater bearing platform |
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