CN206090593U - Concrete cofferdam and steel sheet piling cofferdam combination formula cofferdam structure - Google Patents
Concrete cofferdam and steel sheet piling cofferdam combination formula cofferdam structure Download PDFInfo
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- CN206090593U CN206090593U CN201620936023.8U CN201620936023U CN206090593U CN 206090593 U CN206090593 U CN 206090593U CN 201620936023 U CN201620936023 U CN 201620936023U CN 206090593 U CN206090593 U CN 206090593U
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Abstract
The utility creatively provides a concrete cofferdam and steel sheet piling cofferdam combination formula cofferdam structure, including the concrete cofferdam of pouring cyclization and the steel sheet piling cofferdam on upper portion, concrete cofferdam's top is equipped with U type notch, each steel sheet pile cartridge that steel sheet piling cofferdam includes is in in the U type notch to the pouring has cement mortar in U type notch, steel sheet piling cofferdam inside is equipped with the annular and encloses the purlin, encloses the purlin inboard in the annular and is equipped with the internal stay. The utility model discloses the creation is big with concrete cofferdam rigidity, arranges the great lower part of water pressure in, and steel sheet piling cofferdam arranges the less upper portion of water pressure in, makes the total atress more reasonable, structure safe and reliable. The long drawback of traditional concrete cofferdam construction cycle has been overcome, the utility model provides a combination cofferdam has been reduced concrete cofferdam and has been pour the height, and the steel sheet pile installation need not buried to insert and beaten, and the installation rate is accelerated greatly, can complete in 18 meters cofferdam in general about 30 days, the ability that possesses the cushion cap construction that can be very fast.
Description
Technical field
The invention belongs to bridge construction technical field, more particularly, to a kind of concrete cofferdam and steel sheet-pile cofferdam group
Box-like cofferdam structure.
Background technology
In rich groundwater or rift region deep basal pit bearing platform construction, for guarantee cushion cap excavate when stability of slope and
Effectively sealing, is indispensable temporary structure using cofferdam.Concrete cofferdam submergence depth is big, and globality is strong, good stability,
Larger vertical load and horizontal loading can be born, inner support need not be set in circular concrete cofferdam sinking watching, it is simple to operate,
It is domestic at present typically to adopt concrete open caisson cofferdam, steel sheet-pile cofferdam, underground the characteristics of water sealing effect is good with shape is easily moulded
The technologies such as diaphragm wall, multi-stage light well-points dewatering open cut slope construction deep basal pit cushion cap, but there is certain fitting in above-mentioned technology
The property used scope, with limitation, its construction period is longer, cost is high.Steel sheet-pile cofferdam have it is light, readily removable remove, repeatable profit
The characteristics of with, short construction period and low cost, but globality poor, the horizontal loading for bearing is less, for the deep base more than 15 meters
Hole is inapplicable.Therefore research one kind is needed badly in Muddy Bottoms geology, can adapt to that excavation of foundation pit depth is deep, speed of application is fast, make
The low and convenient and reliable novel cofferdam structure of valency and construction method.
The content of the invention
In view of this, the invention is directed to a kind of concrete cofferdam and steel sheet-pile cofferdam combined type cofferdam structure,
Its simple structure, it is reasonable in design, economize on resources.
To reach above-mentioned purpose, what the technical scheme of the invention was realized in：
A kind of concrete cofferdam and steel sheet-pile cofferdam combined type cofferdam structure, including cast cyclization concrete cofferdam and its
The steel sheet-pile cofferdam on top；U-type groove mouth, each steel sheet pile that the steel sheet-pile cofferdam includes are provided with the top of the concrete cofferdam
It is inserted in the U-type groove mouth, and cement mortar is cast with U-type groove mouth；Annular is provided with inside the steel sheet-pile cofferdam to enclose
Purlin, encloses in annular and be provided with the inside of purlin inner support.
Further, the width >=40cm of the U-type groove mouth, depth 70-90cm.
Further, the steel sheet pile adopts the shaped steel plate pile of Larsen IV.
Further, one annular is set every 3-5m in the steel sheet-pile cofferdam short transverse and encloses purlin, and enclose in annular
Inner support is set in purlin.
Further, the annular is enclosed purlin and adopts H profile steel.
Relative to prior art, the invention has the advantage that：
1) concrete cofferdam rigidity is big, is placed in the larger bottom of water pressure, and steel sheet-pile cofferdam is placed in the less top of water pressure,
Make that total stress is more reasonable, structure is safe and reliable.
2) overcome the conventional concrete cofferdam construction cycle it is long the drawbacks of, the invention provide combined cofferdam reduce
Concrete cofferdam pours height, and steel sheet pile is installed and is not required to inserting piling of burying, and installation rate greatly speeds up, the general 30 days left sides in 18 meters of cofferdam
It is right to complete, can faster possess the ability of bearing platform construction.
3) combined cofferdam that the invention is provided substitutes top concrete cofferdam using steel sheet pile, greatly reduces coagulation
Earth cofferdam makes height, simple to operate, it is easy to implement, and effectively reduces difficulty of construction.
4) the combined cofferdam top that the invention is provided adopts steel sheet pile, is pulled out using vibration hammer after bearing platform construction is finished
Go out steel sheet pile, reuse, substantial amounts of fund can be saved.
Description of the drawings
The accompanying drawing for constituting the part of the invention is used for providing further understanding the invention, present invention wound
The schematic description and description made does not constitute the improper restriction to the invention for explaining the invention.
In accompanying drawing：
Fig. 1 is the structural representation of the invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is cast concrete cofferdam construction schematic diagram；
Fig. 4 is steel sheet pile cofferdam construction schematic diagram；
Fig. 5 is combined type sinking of cofferdam construction schematic diagram；
Fig. 6 is combined type cofferdam bearing platform construction schematic diagram.
Description of reference numerals：
1st, concrete cofferdam；2nd, steel sheet-pile cofferdam；3rd, inner support；4th, U-type groove mouth；5th, it is ring-like to enclose purlin；6th, cushion cap；7th, inhale mud to set
It is standby.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the invention can
To be mutually combined.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " on ", D score,
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " is
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the invention and simplifies description, rather than indicates
Or the device or element of hint indication with specific orientation, with specific azimuth configuration and operation, therefore must not be understood that
It is the restriction to the invention.In the description of the invention, unless otherwise stated, " multiple " are meant that two or two
More than individual.
In the description of the invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, can be by concrete condition understanding
State concrete meaning of the term in the invention.
Below with reference to the accompanying drawings and in conjunction with the embodiments describing the invention in detail.
A kind of concrete cofferdam and steel sheet-pile cofferdam combined type cofferdam structure, as shown in Figures 1 to 6, including cast cyclization
The steel sheet-pile cofferdam 2 on concrete cofferdam 1 and its top；The top of the concrete cofferdam 1 is provided with U-type groove mouth 4, the steel sheet pile
Each steel sheet pile that cofferdam 2 includes is inserted in the U-type groove mouth 4, and is cast with cement mortar in U-type groove mouth 4；The steel plate
Annular is provided with inside pile cofferdam and encloses purlin 5, enclosed the inner side of purlin 5 in annular and be provided with inner support 3.
Width >=the 40cm of above-mentioned U-type groove mouth 4, depth 70-90cm.Above-mentioned steel sheet pile adopts the shaped steel plate pile of Larsen IV.It is U-shaped
Notch can be very good to accommodate steel sheet pile, and be fixed using cement mortar.
Wherein, one annular is set every 3-5m in the short transverse of the steel sheet-pile cofferdam 2 and encloses purlin 5, and enclose in annular
Inner support 3 is set in purlin 5.
Above-mentioned annular is enclosed purlin 5 and adopts H profile steel, concrete model to be determined according to different operating modes.The inner support 3 is steel pipe,
Concrete model can determine according to different operating modes.
The construction method of a kind of concrete cofferdam and steel sheet-pile cofferdam combined type cofferdam structure is provided below, including following step
Suddenly：
1. the place at smooth pier position, pours batardeau concrete, reserved U-shaped together at concrete cofferdam end face center position
Notch；During construction, first formwork erection assembling reinforcement pours first section batardeau concrete, then according to foundation depth, submergence depth and on connect
Steel plate pile length, cast-in-place remaining section batardeau concrete.It should be noted that concrete cofferdam is cast-in-place must be cyclic, along height side
To can placement layer by layer, typically can be by mono- layer of placement layer by layer of 3m along short transverse；
2. steel sheet pile is lifted to the reserved U-type groove mouth in concrete cofferdam top layer top, is anti-when steel sheet pile is installed
Only underground water or river are flowed in cofferdam from notch, and synchronously need to synchronously pour water cement mortar when steel sheet pile is installed into U-type groove mouth,
Cement mortar had both played resistance effect, can effectively consolidate steel sheet pile footing again, it is ensured that it is stablized；Steel sheet pile can be using shoe
Band is lifted；
The construction method of U-type groove mouth is, using bamboo slab rubber or steel form, reserves one 40cm width, 80cm deep groove, mixed
Solidifying soil should be noted the firm of rebate former when pouring, it is ensured that non-rising when it is poured, position does not offset, and must not have in notch mixed
Solidifying soil is flowed into, and removes rebate former, rubbish in cleaning groove, to be formed for installing steel immediately after the solidification of epimerite batardeau concrete
The U-type groove mouth of sheet pile；
3. after steel sheet pile is all installed, annular is installed inside steel sheet pile and encloses purlin and inner support；
4. inhale mud equipment 7 using grab bucket or suction dredge etc. to remove in the soil in this combined type cofferdam, allow sinking of cofferdam extremely
Behind designed elevation position, back cover carries out cushion cap 6 and constructs.In this step, soil in removing cofferdam symmetrically and evenly is should be noted.
Preferably, above-mentioned annular is enclosed purlin and is arranged together every 3-5m in steel sheet-pile cofferdam short transverse.
Conventional concrete cofferdam construction step is：Formwork erection → reinforcing bar colligation → pour → wait strong → sinking → next restraining work
→ designed elevation is sunk down into, generally, 18 meters of cofferdam generally require 50 days or so, and the combined type cofferdam knot that the invention is provided
Structure, reduces concrete cofferdam and pours height, and steel sheet pile is installed and is not required to inserting piling of burying, and installation rate also greatly speeds up, and 18 meters are enclosed
Weir typically only needs 30 days or so, the ability that can faster possess bearing platform construction.
The combined type cofferdam structure that the invention is provided, make use of concrete cofferdam and steel sheet-pile cofferdam respective excellent
Point, reaches and adapts to compared with deep basal pit bearing platform construction, the purpose that stagnant water effect is good, the scope of operation is done in relatively rapid formation, and structure safely may be used
By, easy construction, save fund, be especially limited on construction ground, rich groundwater, rift, silt soil strata, depth it is big
It is a kind of effective method in 15 meters of deep basal pit bearing platform construction.
The preferred embodiment of the invention is the foregoing is only, it is all at this not to limit the invention
Within the spirit and principle of innovation and creation, any modification, equivalent substitution and improvements made etc. should be included in the invention
Protection domain within.
Claims (5)
1. a kind of concrete cofferdam and steel sheet-pile cofferdam combined type cofferdam structure, it is characterised in that：Including the coagulation of cast cyclization
Earth cofferdam and its steel sheet-pile cofferdam on top；U-type groove mouth is provided with the top of the concrete cofferdam, the steel sheet-pile cofferdam includes
Each steel sheet pile be inserted in the U-type groove mouth, and be cast with cement mortar in U-type groove mouth；Inside the steel sheet-pile cofferdam
It is provided with annular and encloses purlin, encloses in annular and be provided with the inside of purlin inner support.
2. a kind of concrete cofferdam according to claim 1 and steel sheet-pile cofferdam combined type cofferdam structure, it is characterised in that：
Width >=the 40cm of the U-type groove mouth, depth 70-90cm.
3. a kind of concrete cofferdam according to claim 1 and steel sheet-pile cofferdam combined type cofferdam structure, it is characterised in that：
The steel sheet pile adopts the shaped steel plate pile of Larsen IV.
4. a kind of concrete cofferdam according to claim 1 and steel sheet-pile cofferdam combined type cofferdam structure, it is characterised in that：
One annular is set every 3-5m in the steel sheet-pile cofferdam short transverse and encloses purlin, and enclose in annular and arrange in purlin inner support.
5. a kind of concrete cofferdam according to claim 1 or 4 and steel sheet-pile cofferdam combined type cofferdam structure, its feature exists
In：The annular is enclosed purlin and adopts H profile steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620936023.8U CN206090593U (en) | 2016-08-24 | 2016-08-24 | Concrete cofferdam and steel sheet piling cofferdam combination formula cofferdam structure |
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| CN201620936023.8U CN206090593U (en) | 2016-08-24 | 2016-08-24 | Concrete cofferdam and steel sheet piling cofferdam combination formula cofferdam structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193075A (en) * | 2016-08-24 | 2016-12-07 | 中国铁建大桥工程局集团有限公司 | A kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure and construction method |
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2016
- 2016-08-24 CN CN201620936023.8U patent/CN206090593U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193075A (en) * | 2016-08-24 | 2016-12-07 | 中国铁建大桥工程局集团有限公司 | A kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure and construction method |
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