CN205475280U - Interim dock entrance cofferdam structure convenient to resume - Google Patents
Interim dock entrance cofferdam structure convenient to resume Download PDFInfo
- Publication number
- CN205475280U CN205475280U CN201620166988.3U CN201620166988U CN205475280U CN 205475280 U CN205475280 U CN 205475280U CN 201620166988 U CN201620166988 U CN 201620166988U CN 205475280 U CN205475280 U CN 205475280U
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- CN
- China
- Prior art keywords
- cofferdam
- interim
- sand
- river sand
- dregs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses an interim dock entrance cofferdam structure convenient to resume, include cofferdam and cofferdam on water two parts under water, outside use river sea one side was, in interim dock entrance one side was, the cofferdam used the river sand to cover the internal surface concreting facing wall of dregs and membrane bag sand, river sand in proper order as center, the surface of river sand under water to, the inside of river sand is equipped with triaxial stirring stake, and the center of triaxial stirring stake sets up the plastic concrete cut -pff wall, cofferdam on water includes the clay of being connected with the plastic concrete cut -pff wall, and the surface of clay covers dregs and membrane bag sand, internal surface concreting facing wall in proper order. The utility model discloses a backfilling with the dregs with the river sand and giving first place to, membrane bag sand facing wall has reduced by a wide margin and has filled membrane bag operation engineering volume under water for assisting, is the cofferdam construction method of a quick low cost, has greatly practiced thrift cost and time limit for a project.
Description
Technical field
This utility model relates to a kind of cofferdam construction, is specifically related to a kind of interim dock entrance cofferdam being easy to recover and executes structure.Belong to
Hydraulic engineering technical field.
Background technology
During passing through the constructing tunnel of Jiang Hai, can use immersed tube prefabricated dry-docking that interim dock entrance is set, then logical at pipeline section etc.
Cross after interim dock entrance undocks, carry out interim dock entrance and recover and secondary utilization etc. in depressed place.Wherein, interim dock entrance recovers is to weigh very much
The working procedure wanted.
The weir body in existing interim dock entrance cofferdam is typically based on two side form bag sandfillings, and it is auxiliary for inside filling out river sand.This construction method
There is the weak points such as construction area is narrow, operation work efficiency is low, long construction period, construction cost are big.
Utility model content
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, it is provided that a kind of interim dock entrance cofferdam being easy to recover
Construction method and cofferdam structure.
For achieving the above object, this utility model employing following technical proposals:
It is easy to the interim dock entrance cofferdam construction method recovered, including step:
A), when former interim dock entrance is abolished, the spoir dug out is backfilled as T-shaped dam in former interim dock entrance upstream；
B), when interim dock entrance recovers, on backfill river sand to waterline, underwater cofferdam is formed；
C) under water, construction three axes agitating pile and plastic concrete cut-off wall, use outside dregs backfill underwater cofferdam meanwhile
Weir body so that Wai Yan surface covers one layer of dregs；
D) after Construction of plastic concrete cut-off wall, extracting the water within interim dock entrance, the interior weir body bleeding of underwater cofferdam is solid
After knot, brush slope, afterwards at the surface casting concrete facing wall of interior weir body；Meanwhile, in the dregs surface coverlay of step c)
Bag sand facing wall, to prevent from washing away；
E) on the water, outside and the inner side at underwater cofferdam top backfills dregs and clay respectively so that plastic concrete cut-off wall
It is connected with the clay part of backfill, thus forms cofferdam waterborne, the surface coverlay bag sand facing wall of dregs the most in this section,
And at the surface casting concrete facing wall of clay, to complete the structure of whole seepage prevention system, interim dock entrance so can be recovered
Overall cofferdam.
In step a), the length on T-shaped dam is set as just or at least so that carries out the waters of river sand backfill inside interim dock entrance
For standing water.
In step b), after backfill river sand, the top width of underwater cofferdam is set as at least meeting follow-up seepage prevention system operation and safe need
Want.
In step c), three axes agitating pile uses conventional construction method, utilizes special multi-shaft stirring stake machine to creep into cutting soil on the spot
Body, injects the soil body in drill bit end by cement grout simultaneously, after being thoroughly mixed, forms diaphram wall body, utilizes
This body of wall is directly as gear soil and water sealing structure；Plastic concrete cut-off wall uses conventional method to pour, and can be selected for commodity plasticity
Concrete, continuous pouring, must not interrupt.
Dregs backfill in step c) is to use crane barge to construct.
In step d), the thickness of concrete facing wall is 15cm.
Step d) and e) in film bag sand be the performance utilizing film bag water penetration, after filling sand in film bag formed bar shaped dash
Bag.Because it has certain deadweight, can fit tightly with domatic after natural subsidence is stable, film bag sand cofferdam has good preventing
Scouring capability.
Dregs in step e) uses the method for land transportation to realize backfill.
Step e) construction the most also carries out the dock bottom within interim dock entrance and recovers.
Ti Henei weir, the outer weir body gradient in overall cofferdam sets according to real needs, on Jiang Haizhong, the body slope, outer weir in overall cofferdam
Degree is 1: 3.5, and the interior weir body gradient is 1: 2, and the gradient is the ratio of plumb height and level height.
It is easy to the interim dock entrance cofferdam structure recovered, including underwater cofferdam and cofferdam waterborne two parts；With Jiang Hai side for outward,
Interim dock entrance side is interior, and underwater cofferdam is centered by river sand, and the outer surface of river sand covers dregs and film bag sand, river sand successively
Inner surface casting concrete facing wall, and, the inside of river sand is provided with three axes agitating pile, three axes agitating pile centrally disposed
Plastic concrete cut-off wall；Cofferdam waterborne includes the clay being connected with plastic concrete cut-off wall, and the outer surface of clay covers successively
Lid dregs and film bag sand, inner surface casting concrete facing wall.
Preferably, the top width of underwater cofferdam is set as at least meeting follow-up seepage prevention system operation and safety need.
Preferably, the thickness of concrete facing wall is 15cm.
Preferably, Ti Henei weir, the outer weir body gradient in overall cofferdam sets according to real needs, at Jiang Haizhong, overall cofferdam
The outer weir body gradient is 1: 3.5, and the interior weir body gradient is 1: 2.
The beneficial effects of the utility model:
The spoir that this utility model digs out when being abolished by former interim dock entrance is T-shaped dam in the backfill of the upstream of former interim dock entrance so that
When resuming operation, operation area water flow velocity is little, so can from the most directly using river sand push away to tamp quickly closing up of existing interim dock entrance,
Seepage prevention system construction afterwards can significantly shift to an earlier date, and uses the outer weir body of dregs backfill underwater cofferdam, it is achieved multiple operations same simultaneously
Step can realize compressing the duration of half.This utility model is to backfill with dregs based on river sand, and film bag sand facing wall is auxiliary, greatly
Width decreases filling film bag operation quantities under water, is the cofferdam construction method of a kind of fast and low-cost, has greatly saved cost
And the duration.
Accompanying drawing explanation
Fig. 1 is prior art interim dock entrance cofferdam schematic diagram；
Fig. 2 is prior art interim dock entrance cofferdam profile；
Fig. 3 is interim dock entrance cofferdam of the present utility model schematic diagram；
Fig. 4 is interim dock entrance cofferdam of the present utility model profile；
Wherein, 1 is film bag sand, and 2 is river sand, and 3 is T-shaped dam, and 4 is dregs, and 5 is river sea water bit line, and 6 is water level in depressed place
Line, 7 is plastic concrete cut-off wall, and 8 is three axes agitating pile, and 9 is clay, and 10 is concrete facing wall.
Arrow in Fig. 1 and Fig. 3 indicates water (flow) direction.
Detailed description of the invention
Being further elaborated this utility model with embodiment below in conjunction with the accompanying drawings, it should explanation, the description below is only
It is to explain this utility model, its content is not defined.
Embodiment:
The weir body in existing interim dock entrance cofferdam is typically based on two side form bag sand 1 fillings, and it is auxiliary for inside filling out river sand 2, without T-shaped dam
Backfill (Fig. 1 and Fig. 2), and this utility model is to backfill based on river sand 2 and dregs 4, film bag sand 1 facing wall is auxiliary,
In upstream backfill T-shaped dam (Fig. 3 and Fig. 4), it is achieved quickly closing up of interim dock entrance, under water filling film bag is greatly reduced and makees
Industrial engineering (IE) amount.
During red paddy constructing tunnel, have employed the interim dock entrance cofferdam construction method be easy to and recover of the present utility model, bag
Include step:
A), when former interim dock entrance is abolished, being backfilled in former interim dock entrance upstream by the spoir dug out is T-shaped dam 3, T-shaped dam 3
A length of 60m, it is ensured that the waters carrying out river sand 2 backfill inside interim dock entrance is standing water；
B), when interim dock entrance recovers, on backfill river sand 2 to river sea water bit line 5, underwater cofferdam, the top of underwater cofferdam are formed
Width 35m, meets follow-up seepage prevention system operation and safety need；
C) under water, construction three axes agitating pile 8 and plastic concrete cut-off wall 7, meanwhile, use dregs 4 to backfill and (use
Crane barge is constructed) the outer weir body of underwater cofferdam so that Wai Yan surface covers one layer of dregs 4；Three axes agitating pile 8 uses often
The construction method of rule, utilizes special multi-shaft stirring stake machine to creep into the cutting soil body on the spot, simultaneously in drill bit end by cement grout
Inject the soil body, after being thoroughly mixed, form diaphram wall body, utilize this body of wall directly as gear soil and water sealing structure；
Plastic concrete cut-off wall 7 uses conventional method to pour, and selects commodity plastic concrete, continuous pouring, must not interrupt.
D), after plastic concrete cut-off wall 7 construction, the water within interim dock entrance is extracted so that in depressed place, waterline 6 declines,
After the interior weir body bleeding consolidation of underwater cofferdam, brush slope, afterwards at the surface casting concrete facing wall 10 of interior weir body, its thickness
For 15cm；Meanwhile, in dregs 4 surface coverlay bag sand 1 facing wall of step c), to prevent from washing away；
E) on the water, outside and the inner side at underwater cofferdam top backfills dregs 4 and clay 9 respectively so that plastic concrete is prevented
Ooze wall 7 to be connected with clay 9 part of backfill, thus form cofferdam waterborne, the surface coverlay of dregs 4 the most in this section
Bag sand 1 facing wall, and at the surface casting concrete facing wall 10 of clay 9, to complete the structure of whole seepage prevention system, as
This can recover the overall cofferdam of interim dock entrance.The outer weir body gradient in overall cofferdam is 1: 3.5, and the interior weir body gradient is 1: 2,
The most also carry out the dock bottom within interim dock entrance to recover.
It is easy to the interim dock entrance cofferdam structure recovered, including underwater cofferdam and cofferdam waterborne two parts；With Jiang Hai side for outward,
Interim dock entrance side is interior, and underwater cofferdam is centered by river sand 2, and the outer surface of river sand 2 covers dregs 4 and film bag sand 1 successively,
2 inner surface casting concrete facing walls 10 of river sand, and, the inside of river sand 2 is provided with three axes agitating pile 8, three axle stirrings
The centrally disposed plastic concrete cut-off wall 7 of stake 8, the thickness of concrete facing wall 10 is 15cm, the top width of underwater cofferdam
Degree 35m；Cofferdam waterborne includes the clay 9 being connected with plastic concrete cut-off wall 7, and the outer surface of clay 9 covers dregs successively
4 and film bag sand 1, inner surface casting concrete facing wall 10.The outer weir body gradient in overall cofferdam is 1: 3.5, the interior weir body gradient
It is 1: 2.
Although detailed description of the invention of the present utility model is described by the above-mentioned accompanying drawing that combines, but not this utility model is protected
Protecting the restriction of scope, on the basis of the technical solution of the utility model, those skilled in the art need not pay creative labor
The dynamic various amendments that can make or deformation are still within protection domain of the present utility model.
Claims (4)
1. it is easy to the interim dock entrance cofferdam structure recovered, it is characterised in that include underwater cofferdam and cofferdam waterborne two parts；With
Jiang Hai side is outward, and interim dock entrance side is interior, and underwater cofferdam is centered by river sand, and the outer surface of river sand covers dregs successively
With film bag sand, the inner surface casting concrete facing wall of river sand, and, the inside of river sand is provided with three axes agitating pile, and three axles stir
Mix the centrally disposed plastic concrete cut-off wall of stake；Cofferdam waterborne includes the clay being connected with plastic concrete cut-off wall, clay
Outer surface cover dregs and film bag sand, inner surface casting concrete facing wall successively.
Cofferdam structure the most according to claim 1, it is characterised in that the top width of underwater cofferdam is set as the fullest
The follow-up seepage prevention system operation of foot and safety need.
Cofferdam structure the most according to claim 1, it is characterised in that the thickness of concrete facing wall is 15cm.
Cofferdam structure the most according to claim 1, it is characterised in that Ti Henei weir, the outer weir body gradient root in overall cofferdam
Setting according to real needs, at Jiang Haizhong, the outer weir body gradient in overall cofferdam is 1: 3.5, and the interior weir body gradient is 1: 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620166988.3U CN205475280U (en) | 2016-03-04 | 2016-03-04 | Interim dock entrance cofferdam structure convenient to resume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620166988.3U CN205475280U (en) | 2016-03-04 | 2016-03-04 | Interim dock entrance cofferdam structure convenient to resume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205475280U true CN205475280U (en) | 2016-08-17 |
Family
ID=56658345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620166988.3U Withdrawn - After Issue CN205475280U (en) | 2016-03-04 | 2016-03-04 | Interim dock entrance cofferdam structure convenient to resume |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205475280U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604075A (en) * | 2016-03-04 | 2016-05-25 | 中铁隧道集团二处有限公司 | Easily-restored temporary dock entrance cofferdam construction method and cofferdam structure |
-
2016
- 2016-03-04 CN CN201620166988.3U patent/CN205475280U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604075A (en) * | 2016-03-04 | 2016-05-25 | 中铁隧道集团二处有限公司 | Easily-restored temporary dock entrance cofferdam construction method and cofferdam structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160817 Effective date of abandoning: 20170908 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160817 Effective date of abandoning: 20170915 |
|
| AV01 | Patent right actively abandoned |