CN106193075A - A kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure and construction method - Google Patents
A kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure and construction method Download PDFInfo
- Publication number
- CN106193075A CN106193075A CN201610718807.8A CN201610718807A CN106193075A CN 106193075 A CN106193075 A CN 106193075A CN 201610718807 A CN201610718807 A CN 201610718807A CN 106193075 A CN106193075 A CN 106193075A
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- cofferdam
- steel sheet
- pile
- concrete
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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
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- 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)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention provides a kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure, including the steel sheet-pile cofferdam pouring into a mould looped concrete cofferdam and top thereof；The top of described concrete cofferdam is provided with U-type groove mouth, and each steel sheet pile that described steel sheet-pile cofferdam includes is inserted in described U-type groove mouth, and is cast with cement mortar in U-type groove mouth；It is provided with annular inside described steel sheet-pile cofferdam and encloses purlin, enclose in annular and inside purlin, be provided with internal stay.The invention is big by concrete cofferdam rigidity, is placed in the bottom that water pressure is bigger, and steel sheet-pile cofferdam is placed in the less top of water pressure, makes total stress more reasonable, and structural safety is reliable.Overcome the drawback of conventional concrete cofferdam construction cycle length, the combined cofferdam that the invention provides decreases concrete cofferdam and pours height, steel sheet pile is installed and is not required to inserted to play of burying, installation rate greatly speeds up, can complete in 18 meters of cofferdam for general about 30 days, can possess the ability of bearing platform construction faster.
Description
Technical field
The invention belongs to bridge construction technical field, especially relates to a kind of concrete cofferdam and steel sheet-pile cofferdam group
Box-like cofferdam structure and construction method.
Background technology
In rich groundwater or rift region deep basal pit bearing platform construction, during for guaranteeing that cushion cap excavates stability of slope and
Effectively sealing, using cofferdam is indispensable temporary structure.Concrete cofferdam submergence depth is big, and globality is strong, good stability,
Bigger vertical load and horizontal loading can be born, without arranging internal stay in circular concrete cofferdam sinking watching, simple to operate,
Have and be easily moulded shape, the feature that water sealing effect is good, current domestic general employing concrete open caisson cofferdam, steel sheet-pile cofferdam, underground
Diaphragm wall, multi-stage light well-points dewatering open cut put the technology construction deep basal pit cushion caps such as slope, but above-mentioned technology all exists certain fitting
The property used scope, has limitation, and its construction period is longer, cost is high.Steel sheet-pile cofferdam have light, readily removable remove, repeatable profit
By the low feature of, short construction period and cost, but globality is poor, and the horizontal loading born is less, for the deep base more than 15 meters
Cheat inapplicable.Therefore research is needed badly a kind of in Muddy Bottoms geology, it is possible to adapt to that the excavation of foundation pit degree of depth is deep, speed of application fast, make
Novel cofferdam structure that valency is low and convenient and reliable and construction method.
Summary of the invention
In view of this, the invention be directed to a kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure and
Construction method, simple in construction, reasonable in design, economize on resources.
For reaching above-mentioned purpose, the technical scheme of the invention is achieved in that
A kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure, including pour into a mould looped concrete cofferdam and
The steel sheet-pile cofferdam on top；The top of described concrete cofferdam is provided with U-type groove mouth, each steel sheet pile that described steel sheet-pile cofferdam includes
It is inserted in described U-type groove mouth, and is cast with cement mortar in U-type groove mouth；It is provided with annular inside described steel sheet-pile cofferdam to enclose
Purlin, encloses in annular and is provided with internal stay inside purlin.
Further, the width >=40cm of described U-type groove mouth, degree of depth 70-90cm.
Further, described steel sheet pile uses Larsen IV shaped steel plate pile.
Further, described steel sheet-pile cofferdam short transverse arranges one annular every 3-5m and encloses purlin, and enclose in annular
Internal stay is set in purlin.
Further, described annular encloses purlin employing H profile steel.
A kind of concrete cofferdam and the construction method of steel sheet-pile cofferdam combination type cofferdam structure, comprise the steps:
Place at the most smooth pier position, pours batardeau concrete, reserved the most U-shaped in concrete cofferdam end face centre
Notch；
2. by U-type groove mouth reserved for steel sheet pile lifting to concrete cofferdam top layer top, when steel sheet pile is installed, to groove
Mouth inter-sync cementing mortar；
3., after steel sheet pile all installs, purlin and internal stay are enclosed in the internally installed annular of steel sheet pile；
4. utilize grab bucket or suction dredge equipment to be removed by the earth in cofferdam, allow sinking of cofferdam to behind designed elevation position,
Back cover carries out bearing platform construction.
Further, described annular encloses purlin in steel sheet-pile cofferdam short transverse every 3-5m setting one.
Further, step 4. in, earth in removing cofferdam symmetrically and evenly.
Relative to prior art, the invention has the advantage that
1) concrete cofferdam rigidity is big, is placed in the bottom that water pressure is bigger, and steel sheet-pile cofferdam is placed in the less top of water pressure,
Making total stress more reasonable, structural safety is reliable.
2) overcoming the drawback of conventional concrete cofferdam construction cycle length, the combined cofferdam that the invention provides decreases
Concrete cofferdam pours height, and steel sheet pile is installed and is not required to inserted to play of burying, and installation rate greatly speeds up, general 30 days left sides, 18 meters of cofferdam
Can complete in the right side, can possess the ability of bearing platform construction faster.
3) combined cofferdam that the invention provides uses steel sheet pile to substitute top concrete cofferdam, greatly reduces coagulation
Earth cofferdam makes height, simple to operate, it is easy to implements, effectively reduces difficulty of construction.
4) the combined cofferdam top that the invention provides uses steel sheet pile, uses vibration hammer to pull out after bearing platform construction
Go out steel sheet pile, recycling, substantial amounts of fund can be saved.
Accompanying drawing explanation
The accompanying drawing of the part constituting the invention is used for providing being further appreciated by the invention, and the present invention creates
The schematic description and description made, for explaining the invention, is not intended that the improper restriction to 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 combination type sinking of cofferdam construction schematic diagram；
Fig. 6 is combination type cofferdam bearing platform construction schematic diagram.
Description of reference numerals:
1, concrete cofferdam；2, steel sheet-pile cofferdam；3, internal stay；4, U-type groove mouth；5, ring-like purlin is enclosed；6, cushion cap；7, inhale mud to set
Standby.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the invention and the feature in embodiment can
To be mutually combined.
In the description of the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " on ", D score,
Orientation or the position relationship of the instruction such as "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " are
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 instruction
Hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be not understood that
For the restriction to the invention.Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicate
Or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In the description of the invention, unless separately
Being described, " multiple " are meant that two or more.
In the description of the invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be to removably connect, or integratedly
Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to 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, on can being understood by concrete condition
State term concrete meaning in the invention.
Describe the invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
A kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure, as shown in Figures 1 to 6, looped including pouring into a mould
The steel sheet-pile cofferdam 2 on concrete cofferdam 1 and top thereof；The top of described concrete cofferdam 1 is provided with U-type groove mouth 4, described steel sheet pile
Each steel sheet pile that cofferdam 2 includes is inserted in described U-type groove mouth 4, and is cast with cement mortar in U-type groove mouth 4；Described steel plate
It is provided with annular inside pile cofferdam and encloses purlin 5, enclose in annular and inside purlin 5, be provided with internal stay 3.
Width >=the 40cm of above-mentioned U-type groove mouth 4, degree of depth 70-90cm.Above-mentioned steel sheet pile uses Larsen IV shaped steel plate pile.U-shaped
Notch can well accommodate steel sheet pile, and utilizes cement mortar to fix.
Wherein, described steel sheet-pile cofferdam 2 short transverse arranges one annular every 3-5m and encloses purlin 5, and enclose in annular
Internal stay 3 is set in purlin 5.
Above-mentioned annular is enclosed purlin 5 and is used H profile steel, and concrete model can determine according to different operating modes.Described internal stay 3 is steel pipe,
Concrete model can determine according to different operating modes.
A kind of concrete cofferdam and the construction method of steel sheet-pile cofferdam combination type cofferdam structure, comprise the steps:
Place at the most smooth pier position, pours batardeau concrete, reserved the most U-shaped in concrete cofferdam end face centre
Notch；During construction, first formwork erection assembling reinforcement, pour first joint batardeau concrete, then according to foundation depth, submergence depth and on connect
Steel sheet pile length, remaining joint batardeau concrete cast-in-place.It should be noted that the cast-in-place necessary cyclization of concrete cofferdam, 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. by U-type groove mouth reserved for steel sheet pile lifting to concrete cofferdam top layer top, when steel sheet pile is installed, it is anti-
Only subsoil water or river flow in cofferdam from notch, need to synchronize to U-type groove mouth inter-sync cementing mortar when installing steel sheet pile,
Cement mortar had both played resistance effect, can effectively be consolidated by steel sheet pile footing again, it is ensured that it is stable；Steel sheet pile can utilize shoe
Band lifting；
The construction method of U-type groove mouth is, uses bamboo slab rubber or steel form, reserved one 40cm width, and the groove that 80cm is deep, mixed
Solidifying soil should be noted the firm of rebate former when pouring, it is ensured that non-rising when it pours, position does not offsets, and must not have mixed in notch
Solidifying soil flows into, and removes rebate former, rubbish in cleaning groove immediately, be used for installing steel to be formed after epimerite batardeau concrete solidifies
The U-type groove mouth of sheet pile；
3., after steel sheet pile all installs, purlin and internal stay are enclosed in the internally installed annular of steel sheet pile；
4. utilize grab bucket or suction dredge etc. to inhale mud equipment 7 to be removed by the earth in this combination type cofferdam, allow sinking of cofferdam extremely
Behind designed elevation position, back cover carries out cushion cap 6 and constructs.In this step, should be noted earth in removing cofferdam symmetrically and evenly.
Preferably, above-mentioned annular encloses purlin in steel sheet-pile cofferdam short transverse every 3-5m setting one.
Conventional concrete cofferdam construction step is: and formwork erection → reinforcing bar binding → pour → wait is strong → sink → and next controls work
→ sink down into designed elevation, generally, 18 meters of cofferdam are it is generally required to about 50 days, and the combination type cofferdam knot that the invention provides
Structure, decreases concrete cofferdam and pours height, and steel sheet pile is installed and is not required to inserted to play of burying, and installation rate also greatly speeds up, and 18 meters are enclosed
Weir the most only needs about 30 days, can possess the ability of bearing platform construction faster.
The combination type cofferdam structure that the invention provides, make use of concrete cofferdam and steel sheet-pile cofferdam respective excellent
Point, reaches the purpose adapting to do the scope of operation compared with deep basal pit bearing platform construction, stagnant water effect formation good, relatively rapid, and structural safety can
Lean on, easy construction, saving fund, the most limited, rich groundwater, rift, silt soil strata, the degree of depth are big
In the deep basal pit bearing platform construction of 15 meters, it it is a kind of effective method.
The foregoing is only the preferred embodiment of the invention, not in order to limit the invention, all at this
Within the spirit of innovation and creation and principle, any modification, equivalent substitution and improvement etc. made, should be included in the invention
Protection domain within.
Claims (8)
1. a concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure, it is characterised in that: include pouring into a mould looped coagulation
Earth cofferdam and the steel sheet-pile cofferdam on top thereof；The top of described concrete cofferdam is provided with U-type groove mouth, and described steel sheet-pile cofferdam includes
Each steel sheet pile be inserted in described U-type groove mouth, and be cast with cement mortar in U-type groove mouth；Inside described steel sheet-pile cofferdam
It is provided with annular and encloses purlin, enclose in annular and inside purlin, be provided with internal stay.
A kind of concrete cofferdam the most according to claim 1 and steel sheet-pile cofferdam combination type cofferdam structure, it is characterised in that:
Width >=the 40cm of described U-type groove mouth, degree of depth 70-90cm.
A kind of concrete cofferdam the most according to claim 1 and steel sheet-pile cofferdam combination type cofferdam structure, it is characterised in that:
Described steel sheet pile uses Larsen IV shaped steel plate pile.
A kind of concrete cofferdam the most according to claim 1 and steel sheet-pile cofferdam combination type cofferdam structure, it is characterised in that:
Described steel sheet-pile cofferdam short transverse arranges one annular every 3-5m and encloses purlin, and internal stay is set in annular encloses purlin.
5., according to a kind of concrete cofferdam described in claim 1 or 4 and steel sheet-pile cofferdam combination type cofferdam structure, its feature exists
In: described annular is enclosed purlin and is used H profile steel.
6. the concrete cofferdam described in claim 1 and a construction method for steel sheet-pile cofferdam combination type cofferdam structure, it is special
Levy and be, comprise the steps:
Place at the most smooth pier position, pours batardeau concrete, reserves one U-type groove in concrete cofferdam end face centre
Mouthful；
2. by U-type groove mouth reserved for steel sheet pile lifting to concrete cofferdam top layer top, when steel sheet pile is installed, in notch
Synchronize cementing mortar；
3., after steel sheet pile all installs, purlin and internal stay are enclosed in the internally installed annular of steel sheet pile；
4. utilize grab bucket or suction dredge equipment to be removed by the earth in cofferdam, allow sinking of cofferdam to behind designed elevation position, back cover
Carry out bearing platform construction.
A kind of concrete cofferdam the most according to claim 6 and the construction method of steel sheet-pile cofferdam combination type cofferdam structure,
It is characterized in that: described annular is enclosed purlin and arranged together every 3-5m in described steel sheet-pile cofferdam short transverse.
A kind of concrete cofferdam the most according to claim 6 and the construction method of steel sheet-pile cofferdam combination type cofferdam structure,
It is characterized in that: step 4. in, earth in removing cofferdam symmetrically and evenly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610718807.8A CN106193075A (en) | 2016-08-24 | 2016-08-24 | A kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610718807.8A CN106193075A (en) | 2016-08-24 | 2016-08-24 | A kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure and construction method |
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| CN106193075A true CN106193075A (en) | 2016-12-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836247A (en) * | 2017-02-24 | 2017-06-13 | 中铁十九局集团第七工程有限公司 | Combined type cofferdam and its construction method |
| CN110565666A (en) * | 2019-09-24 | 2019-12-13 | 上海市水利工程集团有限公司 | Construction method of flat combined sheet pile ground connecting wall type water retaining cofferdam |
| CN114482100A (en) * | 2022-03-01 | 2022-05-13 | 先高路桥有限公司 | Reinforcing structure of cofferdam and construction method |
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| KR20040039271A (en) * | 2004-04-22 | 2004-05-10 | 한국하이웰산업주식회사 | Shoe coffering method for new construction and repair, reinforcement of bridge open caisson foundation |
| CN203834492U (en) * | 2014-05-13 | 2014-09-17 | 中交第三公路工程局有限公司 | Major diameter round steel sheet pile cofferdam in water |
| CN104988930A (en) * | 2015-07-16 | 2015-10-21 | 中铁大桥局集团有限公司 | Construction method of combined cofferdam suitable for weak geology deep foundation pit |
| CN205046564U (en) * | 2015-09-21 | 2016-02-24 | 中铁建大桥工程局集团第一工程有限公司 | Modular cofferdam structure |
| CN206090593U (en) * | 2016-08-24 | 2017-04-12 | 中国铁建大桥工程局集团有限公司 | Concrete cofferdam and steel sheet piling cofferdam combination formula cofferdam structure |
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2016
- 2016-08-24 CN CN201610718807.8A patent/CN106193075A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040039271A (en) * | 2004-04-22 | 2004-05-10 | 한국하이웰산업주식회사 | Shoe coffering method for new construction and repair, reinforcement of bridge open caisson foundation |
| CN203834492U (en) * | 2014-05-13 | 2014-09-17 | 中交第三公路工程局有限公司 | Major diameter round steel sheet pile cofferdam in water |
| CN104988930A (en) * | 2015-07-16 | 2015-10-21 | 中铁大桥局集团有限公司 | Construction method of combined cofferdam suitable for weak geology deep foundation pit |
| CN205046564U (en) * | 2015-09-21 | 2016-02-24 | 中铁建大桥工程局集团第一工程有限公司 | Modular cofferdam structure |
| CN206090593U (en) * | 2016-08-24 | 2017-04-12 | 中国铁建大桥工程局集团有限公司 | Concrete cofferdam and steel sheet piling cofferdam combination formula cofferdam structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836247A (en) * | 2017-02-24 | 2017-06-13 | 中铁十九局集团第七工程有限公司 | Combined type cofferdam and its construction method |
| CN110565666A (en) * | 2019-09-24 | 2019-12-13 | 上海市水利工程集团有限公司 | Construction method of flat combined sheet pile ground connecting wall type water retaining cofferdam |
| CN114482100A (en) * | 2022-03-01 | 2022-05-13 | 先高路桥有限公司 | Reinforcing structure of cofferdam and construction method |
| CN114482100B (en) * | 2022-03-01 | 2024-03-19 | 先高路桥有限公司 | Reinforcing structure of cofferdam and construction method |
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Application publication date: 20161207 |