CN106801424A - A kind of cofferdam construction method - Google Patents
A kind of cofferdam construction method Download PDFInfo
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- CN106801424A CN106801424A CN201710033606.9A CN201710033606A CN106801424A CN 106801424 A CN106801424 A CN 106801424A CN 201710033606 A CN201710033606 A CN 201710033606A CN 106801424 A CN106801424 A CN 106801424A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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Abstract
The invention discloses a kind of cofferdam construction method, comprise the following steps：Preparations before construction, site clearing, cofferdam unwrapping wire, beat timber, build weir carry, fill detected after cleaning, construction after weir body, cofferdam protection treatment, cofferdam completion, backfilling of earthwork is controlled；It is good with closely knit effect, the waterproof effect in cofferdam is improved, find to be easy to take emergency measures in time during situation, improve the effect of cofferdam construction quality and safety.
Description
Technical field
The present invention relates to water conservancy construction technical field, more specifically, it relates to a kind of cofferdam construction method.
Background technology
It is to build permanent water conservancy projects in hydraulic engineering construction that cofferdam refers to, the provisional building enclosure built, its
Effect is to prevent water and soil from building position into building, so that in cofferdam internal drainage, excavation pit builds building；One
As be mainly used in waterwork, except as formal building a part in addition to, cofferdam is removed typically after being finished, and cofferdam is highly
Higher than the peak level being likely to occur in the construction time；The effect in cofferdam both can with waterproof, enclose water, the hole of foundation ditch can be supported again
Wall.
Mainly there are steel sheet-pile cofferdam, lock steel pipe pile cofferdam, Double-Wall Steel Boxed Cofferdam etc. in common deep water foundation cofferdam, and steel sheet pile encloses
Weir is a kind of the most frequently used sheet-pile cofferdam, and it has intensity high, easily squeezes into hard soil layer；But cofferdam building is in water
Or in soft mud, easily make cofferdam leak or seal low problem, and cofferdam needs stronger structural strength to ensure
The performance resistant to pressure in cofferdam.
The content of the invention
In view of the shortcomings of the prior art, cofferdam sealing property and knot are improved it is an object of the invention to provide one kind
The cofferdam construction method of structure intensity.
To achieve the above object, the invention provides following technical scheme：
A kind of cofferdam construction method, comprises the following steps：
Prepare before S1, construction：The inspection of the scene of a crime, the position of cofferdam and flume is made according to drawing；
S2, site clearing：Draw construction main flat face layout drawing and determine to excavate route, substrate absolute altitude, grade of side slope and earthwork heap
Place is put, all barriers and trees weeds in excavation region are removed；
S3, cofferdam unwrapping wire：Cofferdam is positioned, and cofferdam is released according to floor plan and started to the position of closing position；
S4, beat timber：Timber is pressed into ground end, and spacing is 1 meter；
S5, base weir carry：After timber gets to depth, put colour bar cloth, bamboo plate along the direction laying of the timber for sinking to and fill mud
The woven bag of soil, and tamped with clay in the middle of woven bag；
S6, fill weir body：Steel pipe is set up on the timber accomplished fluently and forms one with timber, then be strained and fixed with steel wire rope connection,
An entirety is formed to resist the weir body of water pressure；
S7, cofferdam protection treatment：On weir, body upstream face lays one layer of Cloth capable of reflecting sun infrared and ultraviolet rays, while being equipped with one layer of woven bag on Cloth capable of reflecting sun infrared and ultraviolet rays
Dress soil；
Cleared up after S8, cofferdam completion：Weir Nei Shui is drained and the mud of river bed is cleared up；
Detected after S9, construction：The top layout multiple observation station in cofferdam, water level, sedimentation to cofferdam, displacement are observed, and
Form sedimentation deformation curve；
S10, backfilling of earthwork control.
Be arranged such, by the inspection of the scene of a crime, making corresponding drawing, be easy to carry out cofferdam overall layout and
Operation, convenient observation, afterwards again to site clearing, after cleaning out the plants such as some scum silica frost, impetuousness, it is determined that the base in cofferdam
Place is stacked in bottom absolute altitude, grade of side slope and the earthwork, after being positioned to cofferdam, plan position from start to end；Wood is carried out afterwards
The piling of stake, determines the specific orientation in practically necessary cofferdam, but after timber large size, by setting color cloth and bamboo plate,
Timber is connected, the stability of timber is improved, the braiding that soil and centre clay are tamped will be filled again afterwards
Bag, improves the closely knit effect in cofferdam and the waterproof effect in cofferdam, and steel pipe is set up on the timber accomplished fluently afterwards forms with timber
Integrally, connected with steel wire rope and be strained and fixed, form an entirety to resist the weir body of water pressure, improve the stability in cofferdam,
Improve the structural strength of weir body；On weir, body upstream face lays one layer of Cloth capable of reflecting sun infrared and ultraviolet rays after cofferdam is good, while being equipped with Cloth capable of reflecting sun infrared and ultraviolet rays
One layer of knitting bagged soil, improves to the protective effect after absorbed weir body to weir body, reduces rainwater and weir body is washed away, and cofferdam completes
Afterwards to carrying out plumbing in weir, it is to avoid the transition in weir is moist, while clearing up sludge, make to increase in weir, reduction is being built
Transition sedimentation when building weir body, after cofferdam is built up, in the top layout multiple observation station in cofferdam, to the water level to cofferdam, sedimentation, position
Shifting is observed, and forms sedimentation deformation curve, can in real time understand the concrete condition in cofferdam, convenient to going out corresponding countermeasure, most
Afterwards again by backfilling of earthwork control, make weir body ground end more consolidation, after more stablize when it builds pedestal, reduce sedimentation
Amount, improves security and stability；Have in whole scheme and improve cofferdam sealing property and structural strength, while also improve cofferdam building
Observation performance when building, and then improve the effect of the security and stability of cofferdam construction.
Further set：When weir body is built, weir is carried the arc for building up and encircleing to upstream face, the height that arches upward is river width
10%, and not less than 2 meters, the reinforcing of two row's timbers is played in the side slope of the side that backwater is carried on weir, the diameter of timber is not less than 10 lis
Rice, a length of 4~6 meters, 1.5 meters of array pitch and is staggered at 1 meter of pilespacing, and 2 meters are built with the woven bag for filling clay in the inner side of timber
Dike wide, then fill weir body.
It is arranged such, windward side is set into camber, the impact that water is proposed to weir can be reduced, reaches an effect for caching,
With the effect of weir body structure is improved, while make a call to two row's timbers during the side slope of a side of backwater is put forward on weir reinforcing, branch can be played
Support weir body receives the effect of hydraulic pressure or impact, improves the effect of weir body structure；Used in the inner side of timber simultaneously and fill clay
Woven bag builds 2 meters of dikes wide, then fills weir body, with the effect for improving weir body structural strength, with timber in the intensity of weir body
Play good supporting role.
Further set：When timber is beaten, first help stake in place timber, timber is beaten using excavator, bucket is by timber
Press-in ground certain depth is subdued from after surely by timber, and spacing is 1 meter.
It is arranged such, will be again beaten after timber righting in advance, improve the accuracy that timber inserts ground end, treats that timber is steady
After fixed, then beaten, the stability and safe operation performance of timber can be improved.
Further set：After timber gets to depth, colour bar cloth and bamboo plate are laid along the direction of timber, be then placed in filling
The woven bag of soil, in the way of laminating two rows pile up neatly successively；Opposite side timber and stacking are squeezed into the same way
Two row's woven bags or straw bag, centre are tamped with clay, and follow-up is until cofferdam completion, cofferdam is highly higher by 1 meter of the water surface successively.
It is arranged such, colour bar cloth and bamboo plate is laid by the direction along timber, can improve that timber squeezed into after ground end is whole
Body connection function, improves the structural strength of building weir body, while by colour bar cloth and bamboo plate, also improving the closely knit effect that weir puies forward
Really, so improve cofferdam waterproof effect；Cofferdam is highly higher by 1 meter of the water surface, the effect that water body is flowed into the body of weir is effectively reduced,
Improve the waterproof sealing effect of weir body.
Further set：After the completion of cofferdam, discharged with the water in pump handle cofferdam, and it is oblique with steel pipe in side downstream
Support, to keep out the pressure of unilateral water.
It is arranged such, after the water in cofferdam is discharged, is easy to being constructed in cofferdam, while in the side steel in downstream
Pipe diagonal brace, increases cofferdam to keeping out the effect of the pressure of unilateral water, improves the structural strength in cofferdam.
Further set：In the protection treatment of cofferdam, the Cloth capable of reflecting sun infrared and ultraviolet rays of upstream face is protected using non-woven geotextile, and in nothing
Spin between geotextiles are stitched and coupled with nylon rope, using the native woven bag compacting protection of dress under the toe of outside.
It is arranged such, Cloth capable of reflecting sun infrared and ultraviolet rays is set by upstream face, water can be reduced cofferdam is washed away, improves the protection to cofferdam
Effect, while non-woven geotextile has the good and cheap effect of structural strength, being coupled with nylon rope between geotextiles are stitched can
Bonding strength when improving overall covering between non-woven geotextile, in outer side slope underfooting using the native woven bag compacting protection of dress, carries
Non-woven geotextile high is pressed in the effect on cofferdam, improves the protective effect to cofferdam.
Further set：The Cloth capable of reflecting sun infrared and ultraviolet rays of upstream face is layed in the side in riverbed, and not less than 2 meters, levels Cloth capable of reflecting sun infrared and ultraviolet rays is taken
Spreading degree is 1 meter, and remaining joint length overlap joint is 0.5 meter.
It is arranged such, improves the effect that Cloth capable of reflecting sun infrared and ultraviolet rays protects cofferdam.
Further set：Backfilling of earthwork control is comprised the following steps：
1）Earthwork selection：Slag or sticky earthen backfill using biochemistry pool cubic metre of earth, and ram compaction in layers with the frog；
2）Layering joint treatment：Every layer of seam crossing is stepped arrangement, and it is 0.5 meter to grind mark, and levels seam should stagger and not small
In 1 meter；
3）Anticipated settlement：No more than the 3% of embankment total height；
4）Pond side slope requirement：Stepped setting, and the ratio of width to height is 1:1.5, a height of 300 millimeters, a width of 450 millimeters of step；
5）Compacting filling soil quality testing：Inspection is sampled using layering, multiple check points is set and is checked its bulk density and water content.
It is arranged such, using the slag of biochemistry pool cubic metre of earth or sticky earthen backfill, can reduces in the earthwork by middle part cubic metre of earth
Biological bacterium etc. grow, reduce the biological corrosion to weir body, increase the structural stability at end and reduction in the body of weir and build up weir
Transition sedimentation after body；Every layer of seam crossing is stepped arrangement, and levels seam should stagger, and can improve the connection between adjacent layering
Stability, while anticipated settlement is no more than the 3% of embankment total height, effectively adapts to the regulation after the later stage micro sedimentation of weir body
Effect, the stepped setting of pond side slope makes weir body be set in triangular shape on the whole, can improve the structural stability of weir body, most
Detection is sampled after compacting filling soil afterwards, line density and water content detection are entered to weir body, improved to the implementation exploration of weir body
Effect.
Further set：In compaction in layers, grinding compacting, and side of a pond block stone grain diameter is not more than 20 centimetres, organic matter contains
Amount is not more than 8%, and clay content is not less than 50%.
It is arranged such, makes cofferdam middle part by compaction in layers, grinding compacting reaches the effect of monolithic stability, while the side of a pond
Block stone grain diameter is not more than 20 centimetres, can reduce when rolling, the gap between adjacent stone grain, increases the closely knit of backfilling of earthwork
Degree；Content of organics is not more than 8% simultaneously, reduces the growth of some biological bacteriums and corrodes cofferdam, improves the building safety of weir body
Property；And clay content is not less than 50%, the mutual bonding of backfill material in the body of weir can be improved, and then improve the structural stability of weir body.
Further set：In layering joint treatment, the compacting of embankment edge, wide to fill out 0.2 meter, bluff makes real, and
Pounded with frog hammer closely knit.
It is arranged such, the compactedness of each layer can be improved, reduce later stage transition sedimentation, while edge is compacted, reduces soil
The abrasion of method, edge, is easy to improve overall stability.
Compared compared with the prior art by using above-mentioned technical proposal, the present invention：Make that there is safety in the architectural process of cofferdam
The effect of stabilization, after cofferdam is built up, by color cloth, bamboo plate and woven bag, can improve the sealing property and knot in cofferdam
Structure intensity, is easy to later stage weir body and backfilling of earthwork to carry out preparation of construction；It is right simultaneously in the top layout multiple observation station in cofferdam
The water level in cofferdam, sedimentation, displacement are observed, and form sedimentation deformation curve, can in real time understand the concrete condition in cofferdam, convenient
To going out corresponding countermeasure；Observation performance when also raising cofferdam is built simultaneously, and then improve the security and stability of cofferdam construction
Effect.
Specific embodiment
A kind of cofferdam construction method is described further below.
A kind of cofferdam construction method, comprises the following steps：
Prepare before S1, construction：The inspection of the scene of a crime is first carried out, space enrironment, geology and sub-marine situations are understood, formulated further according to drawing
Go out the position of cofferdam and flume.
S2, site clearing：Draw construction main flat face layout drawing and determine to excavate route, substrate absolute altitude, grade of side slope and soil
Place is stacked by side, removes all barriers and trees weeds in excavation region.
S3, cofferdam unwrapping wire：Cofferdam is positioned, and cofferdam is released according to floor plan and started to the position of closing position,
Banketed absolute altitude with level measurement during filling.
S4, beat timber：From fine quality timber during timber buying, timber is long 6 meters, microcephaly 14cm ~ 16cm, and timber is not
Must have channel, crackle or other be enough to damage the flaw of intensity；First help stake in place timber, 2 people help stake, 1 people is responsible for controlling stake
Perpendicularity, spacing, stake top absolute altitude etc., recycle excavator to beat timber, bucket is by timber press-in ground certain depth from steady
Afterwards, then allow and help a people to leave, then timber is subdued；The reinforcing of two row's timbers is played in the side side slope that weir carries backwater, and
Often row squeezes into timber for 4, and the diameter of timber is not less than 10 centimetres, a length of 4~6 meters, 1.5 meters of array pitch, 1 meter of pilespacing and staggered row
Row, squeeze into opposite side timber in the same way.
S5, base weir carry：In order that closely knit effect is good, the waterproof effect in cofferdam is improved, after timber gets to depth, along timber
Colour bar cloth and bamboo plate are laid in direction, are then placed in filling the woven bag of soil, and in the way of laminating two rows pile up successively
Neatly, and in the middle of woven bag tamped with clay, follow-up is until cofferdam completion, cofferdam is highly higher by 1 meter of the water surface successively.
When weir body is built, weir is carried the arc for building up and encircleing to upstream face, the height that arches upward is the 10% of river width, and not less than 2
Rice, builds 2 meters of dikes wide, then fill weir body in the inner side of timber with the woven bag for filling clay.
S6, fill weir body：Steel pipe is set up on the timber accomplished fluently and forms one with timber, then tensed with steel wire rope connection solid
It is fixed, an entirety is formed to resist the weir body of water pressure.
S7, cofferdam protection treatment：Ensure that cofferdam is safely the Reliable guarantee that construction is smoothed out, in order to prevent rain drop erosion
With the influence of stormy waves, after the completion of cofferdam is filled, on weir, body upstream face lays one layer of Cloth capable of reflecting sun infrared and ultraviolet rays, and Cloth capable of reflecting sun infrared and ultraviolet rays is entered using non-woven geotextile
Row protection, and coupled with nylon rope between geotextiles seam, Cloth capable of reflecting sun infrared and ultraviolet rays is layed in the side in riverbed, and not less than 2 meters, levels are too
The positive cloth lap of splice is 1 meter, and remaining joint length overlap joint is 0.5 meter；Using the native woven bag compacting protection of dress under the toe of outside, together
When one layer of knitting bagged soil is equipped with Cloth capable of reflecting sun infrared and ultraviolet rays.
Cleared up after S8, cofferdam completion：Discharged with the water in pump handle cofferdam, and in the steel pipe diagonal brace of side downstream,
To keep out the pressure of unilateral water；Weir Nei Shui is drained again and the mud of river bed is cleared up.
Detected after S9, construction：The top layout multiple observation station in cofferdam, water level, sedimentation to cofferdam, displacement are seen
Survey, and form sedimentation deformation curve.
S10, backfilling of earthwork control, comprise the following steps：
1）Earthwork selection：Slag or sticky earthen backfill using biochemistry pool cubic metre of earth, and compaction in layers is rammed with the frog, compacting factor is
0.9, rubble can block stone maximum particle diameter be not more than 20 centimetres, big particle diameter concentration fill or must not be filled at sectionalizing joint or embankment connects
At head, content of organics is not more than 8%, and pool slag clay content is no less than 50%；Travelled back and forth by earthwork construction machinery at the top of cofferdam,
Compacting, compactness is not less than 80%, and levee crown reserves 50 centimetres of settling amounts.
2）Layering joint treatment：Every layer of seam crossing is stepped arrangement, and it is 0.5 meter to grind mark, levels seam should stagger and
Not less than 1 meter；Embankment edge is compacted, and wide to fill out 0.2 meter, bluff makes real, and is pounded with frog hammer closely knit.
3）Anticipated settlement：No more than the 3% of embankment total height.
4）Pond side slope requirement：Stepped setting, and the ratio of width to height is 1:1.5, a height of 300 millimeters of step, a width of 450 milli
Rice.
5）Compacting filling soil quality testing：Inspection is sampled using layering, multiple check points is set and is checked its density and is contained
Water.
S11, anti-mix geomembrane：After the completion of cofferdam is filled, considered whether in upstream face laying antiseepage geotechnique depending on seepage flow situation
Film, if seepage flow is excessive, takes upstream face to cover geomembrane measure, during laying geomembrane, in bottom ballast, meets geomembrane edge
Wind face is smooth to riverbed bottom, and geomembrane is extended to 1-2 centimetres under the bottom of slope of cofferdam, and implantation soil layer in bottom is once or anti-using sand pocket
Pressure, it is ensured that cofferdam safety.
S12, foundation ditch Yield rainfall relation：Open drain is excavated after cofferdam is good on the inside of cofferdam, gutter digs deep 1.5-2 centimetres, top
Portion wide is less than 1 centimetre, and 50 meters of interval sets catch pit, i.e., exclude the ponding in cofferdam with slush pump.
S13, the dismounting in cofferdam：As the case may be, may be selected to remove or do not remove cofferdam.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of cofferdam construction method, it is characterised in that comprise the following steps：
Prepare before S1, construction：The inspection of the scene of a crime, the position of cofferdam and flume is made according to drawing；
S2, site clearing：Draw construction main flat face layout drawing and determine to excavate route, substrate absolute altitude, grade of side slope and earthwork heap
Place is put, all barriers and trees weeds in excavation region are removed；
S3, cofferdam unwrapping wire：Cofferdam is positioned, and cofferdam is released according to floor plan and started to the position of closing position；
S4, beat timber：Timber is pressed into ground end, and spacing is 1 meter；
S5, base weir carry：After timber gets to depth, put colour bar cloth, bamboo plate along the direction laying of the timber for sinking to and fill mud
The woven bag of soil, and tamped with clay in the middle of woven bag；
S6, fill weir body：Steel pipe is set up on the timber accomplished fluently and forms one with timber, then be strained and fixed with steel wire rope connection,
An entirety is formed to resist the weir body of water pressure；
S7, cofferdam protection treatment：On weir, body upstream face lays one layer of Cloth capable of reflecting sun infrared and ultraviolet rays, while being equipped with one layer of woven bag on Cloth capable of reflecting sun infrared and ultraviolet rays
Dress soil；
Cleared up after S8, cofferdam completion：Weir Nei Shui is drained and the mud of river bed is cleared up；
Detected after S9, construction：The top layout multiple observation station in cofferdam, water level, sedimentation to cofferdam, displacement are observed, and
Form sedimentation deformation curve；
S10, backfilling of earthwork control.
2. a kind of cofferdam construction method according to claim 1, it is characterised in that：When weir body is built, weir is carried and is built up
To the arc that upstream face encircles, the height that arches upward is the 10% of river width, and not less than 2 meters, two is made a call in the side side slope that weir carries backwater
Row's timber is reinforced, and the diameter of timber is not less than 10 centimetres, a length of 4~6 meters, 1.5 meters of array pitch, 1 meter of pilespacing and is staggered, in wood
2 meters of dikes wide are built in the inner side of stake with the woven bag for filling clay, then fill weir body.
3. a kind of cofferdam construction method according to claim 1, it is characterised in that：When timber is beaten, timber is first helped into stake
In place, timber is beaten using excavator, bucket from after surely, subdues, spacing timber press-in ground certain depth by timber
It is 1 meter.
4. a kind of cofferdam construction method according to claim 1 or 3, it is characterised in that：After timber gets to depth, along timber
Direction laying colour bar cloth and bamboo plate, be then placed in filling the woven bag of soil, in the way of laminating two rows pile up whole successively
Together；Opposite side timber is squeezed into the same way and two row's woven bags or straw bag is stacked, and centre is tamped with clay, followed up successively
Until cofferdam completes, cofferdam is highly higher by 1 meter of the water surface.
5. a kind of cofferdam construction method according to claim 1, it is characterised in that：After the completion of cofferdam, pump handle cofferdam is used
Interior water discharge, and in the steel pipe diagonal brace of side downstream, to keep out the pressure of unilateral water.
6. a kind of cofferdam construction method according to claim 1, it is characterised in that：In the protection treatment of cofferdam, upstream face
Cloth capable of reflecting sun infrared and ultraviolet rays is protected using non-woven geotextile, and is coupled with nylon rope between non-woven geotextile seam, using dress under the toe of outside
Native woven bag compacting protection.
7. a kind of cofferdam construction method according to claim 1 or 6, it is characterised in that：The Cloth capable of reflecting sun infrared and ultraviolet rays of upstream face is layed in
The side in riverbed, and not less than 2 meters, the levels Cloth capable of reflecting sun infrared and ultraviolet rays lap of splice is 1 meter, remaining joint length overlap joint is 0.5 meter.
8. a kind of cofferdam construction method according to claim 1, it is characterised in that：Backfilling of earthwork control includes following step
Suddenly：
1）Earthwork selection：Slag or sticky earthen backfill using biochemistry pool cubic metre of earth, and ram compaction in layers with the frog；
2）Layering joint treatment：Every layer of seam crossing is stepped arrangement, and it is 0.5 meter to grind mark, and levels seam should stagger and not small
In 1 meter；
3）Anticipated settlement：No more than the 3% of embankment total height；
4）Pond side slope requirement：Stepped setting, and the ratio of width to height is 1:1.5, a height of 300 millimeters, a width of 450 millimeters of step；
5）Compacting filling soil quality testing：Inspection is sampled using layering, multiple check points is set and is checked its bulk density and water content.
9. a kind of cofferdam construction method according to claim 8, it is characterised in that：In compaction in layers, grinding compacting, and the pool
Side block stone grain diameter is not more than 20 centimetres, and content of organics is not more than 8%, and clay content is not less than 50%.
10. a kind of cofferdam construction method according to claim 8, it is characterised in that：In layering joint treatment, embankment edge
Position is compacted, and wide to fill out 0.2 meter, bluff makes real, and is pounded with frog hammer closely knit.
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| CN113266028A (en) * | 2021-05-17 | 2021-08-17 | 中电建十一局工程有限公司 | Construction method of sea area beach section highway riprap cofferdam seepage prevention system |
| CN113605422A (en) * | 2021-09-13 | 2021-11-05 | 西安热工研究院有限公司 | Construction method of wood-bamboo clay cofferdam |
| CN115288172A (en) * | 2022-08-30 | 2022-11-04 | 广东海外建设咨询有限公司 | River cofferdam construction method in bridge construction |
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| CN107338802A (en) * | 2017-07-14 | 2017-11-10 | 中国水利水电第十三工程局有限公司 | A kind of beach cofferdam construction device and construction method |
| CN107675717A (en) * | 2017-09-09 | 2018-02-09 | 中建八局第三建设有限公司 | Phytal zone green jumbo bag cofferdam construction method |
| CN108330996B (en) * | 2018-04-12 | 2023-10-10 | 浙江大学城市学院 | Slurry pond cofferdam and construction method |
| CN108330996A (en) * | 2018-04-12 | 2018-07-27 | 浙江大学城市学院 | Mud pit cofferdam and construction method |
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| CN110792089A (en) * | 2019-10-17 | 2020-02-14 | 龙德建设有限公司 | Cofferdam construction method for rock block, thick plastic cloth and bagged clay on dam slope of earth-rock dam |
| CN110747860A (en) * | 2019-10-25 | 2020-02-04 | 中交四航局广州南沙工程有限公司 | Construction method for stripping and backfilling surface soil of water system |
| CN111022764A (en) * | 2019-12-29 | 2020-04-17 | 中铁五局集团第二工程有限责任公司 | Dry construction method for water diversion pipe water-land adapter |
| CN111022764B (en) * | 2019-12-29 | 2021-07-20 | 中铁五局集团第二工程有限责任公司 | Dry construction method for water diversion pipe water-land adapter |
| CN112211211A (en) * | 2020-10-19 | 2021-01-12 | 湖州三通水利建设有限公司 | Method for bagging sandy soil to build cofferdam and cofferdam built by method |
| CN113266028A (en) * | 2021-05-17 | 2021-08-17 | 中电建十一局工程有限公司 | Construction method of sea area beach section highway riprap cofferdam seepage prevention system |
| CN113250265A (en) * | 2021-06-18 | 2021-08-13 | 中铁四局集团有限公司 | River channel half-dry type dredging method |
| CN113605422A (en) * | 2021-09-13 | 2021-11-05 | 西安热工研究院有限公司 | Construction method of wood-bamboo clay cofferdam |
| CN115288172A (en) * | 2022-08-30 | 2022-11-04 | 广东海外建设咨询有限公司 | River cofferdam construction method in bridge construction |
| CN116065611A (en) * | 2023-02-06 | 2023-05-05 | 泗洪县水利工程建设管理中心 | Construction method for preventing centralized leakage of cofferdam |
| CN116065611B (en) * | 2023-02-06 | 2023-09-26 | 泗洪县水利工程建设管理中心 | Construction method for preventing centralized leakage of cofferdam |
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