CN106381878B - Clad steel sheet pile core combined cofferdam environment-friendly demounting construction method - Google Patents
Clad steel sheet pile core combined cofferdam environment-friendly demounting construction method Download PDFInfo
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- CN106381878B CN106381878B CN201610959654.6A CN201610959654A CN106381878B CN 106381878 B CN106381878 B CN 106381878B CN 201610959654 A CN201610959654 A CN 201610959654A CN 106381878 B CN106381878 B CN 106381878B
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- cofferdam
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- weir
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a kind of clad steel sheet pile core combined cofferdam environment-friendly demounting construction methods, include the following steps：A clears up rubbish in cofferdam, and removes sub- cofferdam；B abolishes sidewalk；C digs weir core soil and reserves foundation pit；The cofferdam d return water is to lake surface absolute altitude；E pulls out back side steel sheet pile；F excavates weir core soil；G pulls out upstream face steel sheet pile；H pulls out enclosing, clears up lake surface, completes construction.Construction safety is reliable, high financial profit, environmentally protective, small to ambient contamination.
Description
Technical field
The present invention relates to waters the realm of building construction, in particular to a kind of clad steel sheet pile core combined cofferdam environment-friendly demounting
Construction method.
Technical background
With the progress of society, civilized environmental protection construction, which is increasingly advocated, to be paid attention to, in waters cofferdam demolition operation
Cheng Zhong, when dismounting how to ensure periphery water ecological environment it is not contaminated be that emphasis is needed one of to consider the problems of in work progress.Root
According to the different composed structures in cofferdam, method for dismounting can be divided into blasting procedure and mechanical removal method two major classes.In demolition blasting method,
Since explosion will generate impact force and splashing stone, thus it is larger to ambient influence.And in mechanical removal method, the earthwork needs a large amount of
Excavate and transport outward, spoir needs land occupation, and speed of application is slow, and the construction time is long, and costly.Also, when excavating off-load
It is easy to happen and caves in, there are the security risks such as high falling and mechanical wounding for large-scale machinery use.So no matter what is taken
Kind cofferdam demolition method, the problem of environmental pollution of construction is the emphasis and difficulties that must be faced during cofferdam demolition.
Invention content
The present invention is aiming at the deficiencies in the prior art, and it is reliable to provide a kind of construction safety, economic benefit, environmentally friendly index
High clad steel sheet pile core combined cofferdam environment-friendly demounting construction method.
To achieve the goals above, the clad steel sheet pile core combined cofferdam environment-friendly demounting construction party designed by the present invention
Method, which is characterized in that include the following steps：
A clears up rubbish in cofferdam, and removes sub- cofferdam；
B abolishes sidewalk：Take subregion, method is abolished at the interval of segmentation, and taken closing on a certain range of sidewalk in cofferdam
It changes and fills out when digging；
C digs weir core soil and reserves foundation pit：Calculate the foundation pit size for needing to accommodate weir core soil according to the total side's amount of weir core soil, and away from
It is excavated with a certain distance from cofferdam；
The cofferdam d return water is to lake surface absolute altitude；
E pulls out back side steel sheet pile；
F excavates weir core soil：The weir core soil excavated is had bad luck into step c weir core soil to reserve in foundation pit；
G pulls out upstream face steel sheet pile：The inserting piling enclosing on the outside of steel sheet-pile cofferdam is pulled out in cofferdam after water quality monitoring qualification
Upstream face steel sheet pile, and lakebed is flattened, ensure to restore former lakebed absolute altitude；
H pulls out enclosing, clears up lake surface, completes construction.
Further, the specific implementation process in step a is：Rubbish in cofferdam is cleared up, packeted soil in sub- cofferdam is transported
Harbour is gone to, and the pull rod above earthwork in cofferdam is excavated to the above 50cm of pull rod.Lakebed absolute altitude can be carried out just by implementing this
Step is restored, and ensures that backfill is without containing sundries such as rubbish in cofferdam, it is ensured that lakebed environment is not contaminated.
Further, the specific implementation process of the step b is：Abolish the sidewalk for closing on cofferdam first, after abolish it is remote
Sidewalk from cofferdam side, sidewalk are abolished the earthwork and are transported outward in time.For being used close to the sidewalk within the scope of 5 meters of cofferdam when digging
The mode filled out is changed to clear up, for ensure cofferdam safety, sidewalk is divided into about 10 meters one section, takes interruption to abolish and change and fills out, i.e., every
10 meters are constructed one section.Wherein, it changes and fills out using outsourcing clay.It backfills and the mode of section construction, sidewalk can be abolished when digging
In influence to cofferdam stabilization reduce, ensure the safety in cofferdam.
Still further, in the step c, weir core soil reserves foundation pit need to be apart from 5 meters of cofferdam or more, and the weir core soil is reserved
The depth of foundation pit is 2 meters.Reserved weir core soil matrix hole can be the consumption reserved space of follow-up weir core soil, and weir core soil zone water is avoided to dig
The processes such as outward transport are removed and tedded, manpower and financial resources has been greatly saved, has also avoided the environmental pollution during outer muck haulage.Weir simultaneously
Core soil reserves foundation pit apart from 5 meters of cofferdam or more, ensure that in Excavation Process, the stability in cofferdam.
Still further, after the cofferdam return water to lake surface absolute altitude, SEA LEVEL VARIATION value in cofferdam need to be controlled and be not more than 0.5m/
It.The variation for controlling water level in cofferdam, can keep the hydraulic pressure dynamic equilibrium inside and outside cofferdam, ensure the safety in cofferdam.
Still further, the specific implementation process of step e is：Channel steel waist rail first is pinioned with rope made of hemp one end, the other end is tied up
On steel sheet pile, fills people using canoe and oxygen-acetylene cuts cofferdam waist rail and pull rod；For using the fixed drawing of nut
Bar can gradually unscrew nut, then be cut, for using the pull rod being welded and fixed, being cut after the completion of return water.It ensure that slot
The progress of steel waist rail detaching, while avoiding crashing into lake.
Still further, the specific implementation process of the step f is as follows：It will change and fill out packeted soil outward transport, on the inside of cofferdam
There is the position for reinforcing platform, directly the soil of weir core below pull rod is had bad luck on original reinforcing platform using amphibious digging machine；It is right
It is then needed at the sidewalk close to cofferdam using the first landfill temporary platform on the sidewalk close to cofferdam of amphibious digging machine, then in platform
On the soil of weir core below pull rod is had bad luck, finally weir core soil is had bad luck to reserved foundation pit.
Still further, in step g, with steel sheet-pile cofferdam with length, the enclosing is formed simultaneously the enclosing using deal pile
It is arranged on the outside of cofferdam 20 meters, deal pile spacing is 5 meters, by geotextiles binding on pine, then uses vibration hammer
Deal pile is inserted into water.The setting of deal pile can obstruct inside and outside lake water temporarily, after water quality detection qualification in cofferdam, then remove
The structure.Ensure work progress to lake water water nonpollution.
The advantage of the invention is that：
1, environmentally protective, it is small to ambient contamination.
2, working procedure is rationally disposed, and ensure that the safety of cofferdam demolition to the full extent.
3, greatly reduce weir core soil and excavate outer freight volume, most of weir core soil by transport can on-site elimination, greatly save
Construction cost.
4, reduce the difficulty that weir core soil excavates, be in mud after the water inlet of weir core soil, do not have to a large amount of outward transports, be not take up external big
Amount teds field, earthwork stockyard, is conducive to save social resources, generates great social benefit.
Description of the drawings
Fig. 1 is that the sub- cofferdam packeted soil of the embodiment of the present invention removes equipment erect-position schematic diagram.
Fig. 2 is the standard paragraphs sidewalk structural schematic diagram of the embodiment of the present invention.
Fig. 3 is the reserved foundation pit schematic diagram of the embodiment of the present invention.
Fig. 4 is the cofferdam cross-section diagram of the embodiment of the present invention.
Fig. 5 is that the pull rod of the embodiment of the present invention or less weir core soil excavates schematic diagram.
Fig. 6 is the process flow chart of the present invention.
In figure：Cofferdam 1, sub- cofferdam 2, sidewalk 3, weir core soil 4, cofferdam return water liquid level 5, waters 6, weir core soil reserve foundation pit 7,
Amphibious digging machine 8, steel sheet pile 9, tether 10, construction area 11 in cofferdam.
Specific implementation mode
The present invention is described in further detail in the following with reference to the drawings and specific embodiments：
Clad steel sheet pile core combined cofferdam environment-friendly demounting construction method shown in figure, specifically carries out according to the following steps：
A clears up rubbish in cofferdam, and removes sub- cofferdam；
B abolishes builder's road：Take separation, method is abolished at the interval of segmentation, and closing on a certain range of sidewalk in cofferdam
It takes to change when digging and fill out；
C digs weir core soil and reserves foundation pit：The foundation pit size for needing to accommodate weir core soil is calculated according to weir core soil, and apart from cofferdam
Certain distance excavates；
The cofferdam d return water：By cofferdam return water to lake surface absolute altitude；
E pulls out back side steel sheet pile；
F excavates weir core soil：The weir core soil excavated is had bad luck into step c weir core soil to reserve in foundation pit；
G pulls out upstream face steel sheet pile：The inserting piling enclosing on the outside of steel sheet-pile cofferdam is pulled out in cofferdam after water quality monitoring qualification
Upstream face steel sheet pile, and lakebed is flattened, ensure to restore former lakebed absolute altitude；
H pulls out enclosing, clears up lake surface, completes construction.
Wherein：
A, rubbish in cleaning cofferdam, and remove sub- cofferdam
Before cofferdam demolition, in the place of cofferdam building waste and house refuse clear up, tissue special messenger in field
Exposed reinforcement cuts off outward transport in time；Digging machine, bull-dozer is arranged to carry out cleaning bunch to building waste along the line according to construction, cooperation is certainly
Concentration of unloading outward transport.Packeted soil in sub- cofferdam is operated to harbour, and the pull rod above earthwork in cofferdam is excavated to more than pull rod
At 50cm.Lakebed absolute altitude can tentatively be restored by implementing this, and ensure that backfill is without containing sundries such as rubbish in cofferdam, really
It is not contaminated to protect lakebed environment.Wherein, when lake surface absolute altitude is tentatively restored, absolute altitude is not higher than former lakebed absolute altitude.
B, builder's road is abolished
1）It removes in sub- cofferdam
As shown in Figure 1, pushing up the surface side that meets water in cofferdam is provided with the sub- cofferdam of packeted soil, first removed before builder's road is abolished
Sub- cofferdam.Sub- cofferdam packeted soil is directly hung on dump truck with crane and transports staithe to.Partially due to packeted soil jumbo bag
Aging and without handling, sub- cofferdam dug to dump truck to shift using high-front shovel transport outward.Sub- cofferdam and the back-pressure earthwork
Excavate the more work surfaces in point cofferdam while constructing.The above earthwork of steel sheet-pile cofferdam pull rod, which is excavated to pull rod top, flushes place.
2）Sidewalk is abolished
Standard paragraphs sidewalk structural schematic diagram is as shown in Figure 2.Sidewalk abolishes framing progress, abolishes close on cofferdam just first
Road, after abolish the sidewalk far from cofferdam side.For close to the access path tile slag within the scope of 5 meters of cofferdam by the way of changing and filling out when digging
The general selection outsourcing clay that bankets is changed in cleaning, to ensure cofferdam safety, takes the interval of separation, segmentation broken when being backfilled when digging
Division, specific practice are：Under the premise of ensureing overall sequence of construction, sidewalk is divided into about 10 meters one section, interruption is taken to abolish
It fills out, i.e., constructs one section every 10 meters, the brick slag of sidewalk transports staithe to changing.5 meters of Distance Remaining cofferdam or more sidewalk and
Apart from cofferdam, sidewalk then removes concrete plate and brick slag from small mileage to big mileage farther out, and foundation pit is reserved as weir core soil.
C, it digs weir core soil and reserves foundation pit
The foundation pit size for needing to accommodate weir core soil is calculated according to weir core soil, and is excavated apart from cofferdam certain distance.
As shown in figure 3, weir core soil reserves foundation pit apart from 5 meters of cofferdam or more, intend coordinating amphibious digging machine that will draw using Grab
Remaining weir core soil below bar, which is excavated and passed through, repeatedly has bad luck to reserved foundation pit.
The soil average height of weir core below pull rod is calculated according to 3 meters, and cofferdam is 7 meters wide, cofferdam weir core every meter of about 21m3 of soil, sidewalk
Foundation pit is reserved according to 8-9 meters wide, deep 2 meters of calculating apart from the nearlyr side in cofferdam, while foundation pit is not enough to consumption weir within the scope of sidewalk
The part of core soil considers reserved part foundation pit above top plate.Sidewalk apart from cofferdam farther out side reserve foundation pit according to it is 12-15 meters wide,
Deep 2 meters of calculating, can also widen with specific reference to situation.It needs to ensure that the size of reserved foundation pit can meet weir in specific implementation process
The consumption of core soil requires.
D, cofferdam return water
After the completion of sidewalk is abolished, before cofferdam demolition, weir domestic demand return water to lake surface absolute altitude.It each segment should be according to each waters
Water determine pumping equipment quantity, and control water level increase rate by adjusting number of devices and working time, in principle
It controls SEA LEVEL VARIATION value in cofferdam to be not more than 0.5m/ days, when necessary, pump drainage time guarantee cofferdam safety can be appropriately extended.
E, back side steel sheet pile is pulled out
E1 waist rails and pull rod are removed
Cofferdam cross-section diagram as shown in figure 4, first pinioning channel steel waist rail with rope made of hemp one end, tie up on steel sheet pile by the other end, utilizes
Canoe fills people and oxygen-acetylene cuts cofferdam waist rail and pull rod.For using the fixed pull rod of nut, can gradually unscrew
Nut.It is cut again, for using the pull rod being welded and fixed, being cut after the completion of return water.
E2 back side steel sheet piles are pulled out
Steel sheet pile pull out and transport point waters carries out, pull out the total of sequence according to plane subregion deployment scenario and steel sheet pile
Body is disposed, and is first pulled out to cofferdam back side steel sheet pile.For the inclined steel sheet pile in part using underwater electric arc-oxygen cutting
Method is handled at lakebed absolute altitude.
F, excavate weir core soil
As shown in figure 5, cofferdam core soil and cofferdam back-pressure soil are excavated to reserved foundation pit.Back-pressure is reinforced packeted soil and is directly adopted
With grab bucket cooperation steel buoyancy tank outward transport.There is the position for reinforcing platform on the inside of cofferdam, has directly used amphibious digging machine in original reinforcing
The soil of weir core below pull rod is had bad luck on platform；For then being needed at the sidewalk close to cofferdam using amphibious digging machine first close to enclosing
Then landfill temporary platform on the sidewalk on weir has bad luck the soil of weir core below pull rod on platform, finally have bad luck weir core soil
To reserved foundation pit.
G, upstream face steel sheet pile is pulled out
In cofferdam after water quality monitoring qualification, then upstream face steel sheet pile is pulled out.
Before upstream face steel sheet pile is extracted, on the outside of steel sheet-pile cofferdam 20 meters of one rows of inserting piling with cofferdam with long deal pile
Make anti-pollution enclosing, deal pile spacing is 5 meters, by geotextiles binding on pine, then deal pile is inserted into using vibration hammer
In water.Upstream face steel sheet pile flattens lakebed using digging machine during pulling out, and ensures to restore former lakebed absolute altitude.
H, lake surface is cleared up
After the completion of above-mentioned operation, deal pile is pulled out, and clear up entire Work sectors lake surface floating material, ensures lake surface
Clean no-sundries so far complete construction.
Claims (9)
1. a kind of clad steel sheet pile core combined cofferdam environment-friendly demounting construction method, which is characterized in that include the following steps：
A clears up rubbish in cofferdam, and removes sub- cofferdam；
B abolishes builder's road：Take separation, method is abolished at the interval of segmentation, and taken closing on a certain range of sidewalk in cofferdam
It changes and fills out when digging；
C digs weir core soil and reserves foundation pit：The foundation pit size for needing to accommodate weir core soil is calculated according to weir core soil, and certain apart from cofferdam
Distance is excavated；
The cofferdam d return water：By cofferdam return water to lake surface absolute altitude；
E pulls out back side steel sheet pile；
F excavates weir core soil：The weir core soil excavated is had bad luck into step c weir core soil to reserve in foundation pit；
G pulls out upstream face steel sheet pile：The inserting piling enclosing on the outside of steel sheet-pile cofferdam is pulled out and is met water in cofferdam after water quality monitoring qualification
Face steel sheet pile, and lakebed is flattened, ensure to restore former lakebed absolute altitude；
H pulls out enclosing, clears up lake surface, completes construction.
2. clad steel sheet pile core combined cofferdam environment-friendly demounting construction method according to claim 1, it is characterised in that：Step
Suddenly the specific implementation process in a is：Rubbish in cofferdam is cleared up, packeted soil in sub- cofferdam is operated to harbour, and cofferdam is drawn
The above earthwork of bar is excavated to pull rod.
3. clad steel sheet pile core combined cofferdam environment-friendly demounting construction method according to claim 2, it is characterised in that：Institute
The specific implementation process for stating step b is：Abolish the sidewalk for closing on cofferdam first, after abolish the sidewalk far from cofferdam side, and will break
The cofferdam removed is transported to staithe, for close to the sidewalk within the scope of 5 meters of cofferdam using changed when digging fill out by the way of clear up, be
Ensure cofferdam safety, sidewalk is divided into 10 meters one section, takes interruption to abolish and change and fills out, i.e., constructs one section every 10 meters.
4. clad steel sheet pile core combined cofferdam environment-friendly demounting construction method according to claim 3, it is characterised in that：Institute
It states to change to fill out to change using packeted soil and fill out.
5. clad steel sheet pile core combined cofferdam environment-friendly demounting construction method according to claim 4, it is characterised in that：Institute
It states in step c, it is 2 meters that weir core soil, which reserves foundation pit and need to reserve the depth of foundation pit apart from 5 meters of cofferdam or more, the weir core soil,.
6. clad steel sheet pile core combined cofferdam environment-friendly demounting construction method according to claim 5, it is characterised in that：Institute
After stating cofferdam return water to lake surface absolute altitude, SEA LEVEL VARIATION value in cofferdam need to be controlled and be not more than 0.5m/ days.
7. clad steel sheet pile core combined cofferdam environment-friendly demounting construction method according to claim 6, it is characterised in that：Step
Suddenly the specific implementation process of e is：Waist rail and pull rod are first removed, pinions channel steel waist rail with rope made of hemp one end, the other end is tied up in steel sheet pile
On, it fills people using canoe and oxygen-acetylene cuts cofferdam waist rail and pull rod, for using the fixed pull rod of nut, by
Step unscrews nut, then is cut, for using the pull rod being welded and fixed, being cut after the completion of return water；Back side steel is pulled out again
Sheet pile handles the inclined steel sheet pile in part using the method for underwater electric arc-oxygen cutting at lakebed absolute altitude.
8. clad steel sheet pile core combined cofferdam environment-friendly demounting construction method according to claim 7, it is characterised in that：Institute
The specific implementation process for stating step f is as follows：It will change and fill out packeted soil outward transport, and have the position for reinforcing platform on the inside of cofferdam, directly
The soil of weir core below pull rod is had bad luck on original reinforcing platform using amphibious digging machine；For then being needed at the sidewalk close to cofferdam
Using the first landfill temporary platform on the sidewalk close to cofferdam of amphibious digging machine, then the soil of weir core below pull rod is carried out on platform
It has bad luck, finally weir core soil is had bad luck to reserved foundation pit.
9. clad steel sheet pile core combined cofferdam environment-friendly demounting construction method according to claim 8, it is characterised in that：Step
In rapid g, with steel sheet-pile cofferdam with length, the enclosing is formed using deal pile and is set on the outside of cofferdam 20 meters the enclosing
It sets, deal pile spacing is 5 meters, by geotextiles binding on pine, then uses vibration hammer that deal pile is inserted into water.
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| CN201610959654.6A CN106381878B (en) | 2016-10-27 | 2016-10-27 | Clad steel sheet pile core combined cofferdam environment-friendly demounting construction method |
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| CN201610959654.6A CN106381878B (en) | 2016-10-27 | 2016-10-27 | Clad steel sheet pile core combined cofferdam environment-friendly demounting construction method |
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| CN111764417A (en) * | 2020-06-23 | 2020-10-13 | 中铁隧道集团三处有限公司 | Construction method for dismantling riverbank cofferdam structure |
| CN112144468A (en) * | 2020-09-19 | 2020-12-29 | 陈建斌 | Riverbed flow guide structure for hydraulic engineering construction |
| CN115949086B (en) * | 2023-03-14 | 2023-05-09 | 中交第一航务工程局有限公司 | Method for dismantling assembled caisson cofferdam |
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| CN101289867B (en) * | 2008-04-09 | 2010-06-16 | 中交三航局第二工程有限公司 | Construction process for removing foundation ditch in water |
| KR100963880B1 (en) * | 2009-03-09 | 2010-06-16 | 정광옥 | Excavating method for underground plaza using steel casing retaining wall |
| CN102587387B (en) * | 2012-02-21 | 2015-05-27 | 浙江国丰建设有限公司 | Construction method for foundation pit in Larson steel sheet pile retaining and protecting river |
| CN103911996B (en) * | 2014-04-01 | 2015-08-19 | 中铁六局集团有限公司 | Close on existing building steel sheet pile and pull out construction method |
| CN204551500U (en) * | 2015-03-23 | 2015-08-12 | 中建三局集团有限公司 | Novel cofferdam in a kind of super thick soft foundation |
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