CN203594040U - Self-floating-type steel cofferdam for underwater concrete plane construction - Google Patents
Self-floating-type steel cofferdam for underwater concrete plane construction Download PDFInfo
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- CN203594040U CN203594040U CN201320691841.2U CN201320691841U CN203594040U CN 203594040 U CN203594040 U CN 203594040U CN 201320691841 U CN201320691841 U CN 201320691841U CN 203594040 U CN203594040 U CN 203594040U
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- shield
- buoyancy tank
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- underwater concrete
- cofferdam
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Abstract
The utility model discloses a self-floating-type steel cofferdam for underwater concrete plane construction in order to solve the problem that in the prior art, a no-water construction environment is difficult to create for inspection and maintenance of underwater engineering. The steel cofferdam comprises a hollow shield bottom with an opening facing downwards, a passageway for staff to pass through is arranged at the top of the shield bottom coaxially, and the passageway is communicated with the shield bottom; a buoyancy tank is arranged outside the passageway coaxially in a sleeved mode, the buoyancy tank and the passageway are arranged in a clearance fit mode, a drainage pipe stretching into the bottom of the shield bottom is laid in the passageway, the drainage pipe is connected with a drainage pump, and a buoyancy tank limiting pin is further arranged on the passageway; an air inlet valve and a vent valve are installed at the top of the buoyancy tank, the air inlet valve is connected with an air compressor through an air conveying pipe, and a water inlet/outlet hole is further formed in the bottom of the buoyancy tank. According to the self-floating-type steel cofferdam for underwater concrete plane construction, the shield bottom is controlled to sink down and float up through the buoyancy tank, a no-water inspection and construction environment can be created in cooperation with the drainage device, and the self-floating-type steel cofferdam for underwater concrete plane construction is easy to operate, convenient to move, low in investment cost and capable of being widely applied to the engineering for inspection and maintenance of a bottom plate, a stilling pool apron and other underwater portions of hydraulic structures such as water gates.
Description
Technical field
The utility model relates to one plane construction equipment under water, particularly a kind of self-floating underwater concrete plane construction steel cofferdam.
Background technology
In the engineerings such as Hydraulic and Hydro-Power Engineering and municipal administration, people's air defense, tunnel, some buildings because design is unreasonable, construct lack of standardization can the improper concrete defect phenomenon causing of maintenance very general.Concrete defect mainly contains crack, hole, honeycomb etc.Concrete erosive wear and cavitation erosion are that Hydraulic Outlet is built without common disease.According to investigations, Chinese large-sized concrete dam has nearly 70% engineering to suffer erosive wear and cavitation erosion in running, especially the hydroelectric project of the Yellow River mainstream and southwest, due to silt with bed load content is large, flow rate of water flow is high, the erosive wear of outlet structure escape works and cavitation erosion have become the Major Diseases in some power stations, and the hydraulic structure that grow those running times, because of long-term, under the effect of water pressure, concrete is because carbonization, freeze-thaw damage or corrosive medium erosion etc. reason also can make concrete produce defect.Concrete defect can reduce concrete intensity, shortens its application life; The serious safe operation of dam and the numerous residents' in downstream the life security of even can directly having influence on, therefore just seem extremely important for concrete defect, how to take effective restorative procedure to prevent and treat concrete defect to have caused the very big concern of hydroelectric project circle, become the current urgent problem of hydropower industry.
Have for the repair materials of concrete defect many, as special concrete, polymer cement mortar, material for quickly stopping leakage, various injecting paste materials, macromolecular sheet material, elastoplasticity encapsulant etc., but major part wherein is all only applicable to dry environment.And concrete defect is trapped in the engineering fields such as water conservancy and hydropower, bridge, harbor work, ocean and often can occurs under water; the reparation of these defects often can not form the condition of construction at dry land, and how creating anhydrous inspection construction environment is the problem that Underwater Engineering maintenance and inspection must solve.
Underwater concrete maintenance and inspection mainly adopt steel sheet-pile cofferdam and Double-Wall Steel Boxed Cofferdam to construct under normal circumstances, and its weak point is: adopt steel sheet-pile cofferdam to construct, steel sheet-pile cofferdam can not back cover, has no idea to block water; And adopt completely, Double-Wall Steel Boxed Cofferdam is relatively wasted material, cost is higher.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art, and a kind of self-floating underwater concrete plane construction steel cofferdam is provided, and can create local anhydrous construction environment and conveniently moving, simple to operate, with low cost.
The purpose of this utility model is achieved in that a kind of self-floating underwater concrete plane construction steel cofferdam, and at the bottom of comprising hollow and downward opening shield, the top at the bottom of described shield is coaxially provided with the passage that can pass through for personnel, and described passage is connected with at the bottom of shield; The outer coaxial sleeve of described passage is provided with buoyancy tank, and described buoyancy tank and path clearance are equipped with; The top of described buoyancy tank is provided with admission valve and outlet valve, and described admission valve is connected with air compressor machine by appendix, and the bottom of described buoyancy tank also offers paddle hole.
The utility model is in the time of non-working condition, and the water in buoyancy tank is all emptying, and admission valve and outlet valve are all in closed condition, and whole steel cofferdam is on bubbling through the water column; In the time of needs maintenance construction, by the mode manually pulling, the utility model is dragged to the construction point top water surface, open outlet valve, water enters buoyancy tank by paddle hole, and buoyancy tank sinks under passage starts sinking, shield, until cover construction point at the bottom of being full of water, shield in buoyancy tank, start drainage pump, by gutter by shield at the bottom of in water all emptying, form anhydrous construction environment, personnel can overhaul construction at the bottom of entering shield by passage; After having constructed, close outlet valve, open admission valve and air compressor machine, the water in buoyancy tank is discharged from paddle hole gradually, and buoyancy tank starts floating, upwards floats, until restPose when floating up at the bottom of buoyancy tank spacer pin will drive shield by passage.Compared with prior art, the beneficial effects of the utility model are: utilize deadweight that package unit is sunk under water, coordinate drainage plant to create anhydrous inspection construction environment, thereby form certain underwater construction operation space, maintainer is without carrying any diving and special protection device can be constructed at the bottom of shield; Utilize air pressure draining that buoyancy tank is floated, thereby drive package unit to float, simple to operate, conveniently moving, has higher operating efficiency, and can be repeatedly used, time saving and energy saving, cost of investment is cheap.The underwater sites such as base plate, absorption basin protection-apron that the utility model can be widely used in the hydraulic structures such as sluice checks in repairing work.
As further improvement of the utility model, at the bottom of described shield, outer wall is circumferentially evenly equipped with some Weight plates, and described Weight plate is arranged at vertically at the bottom of shield on outer wall and is fixedly connected with at the bottom of shield by mount cable-tie.The weight of Weight plate at the bottom of for increasing shield, with opposing water impact, is accurately located Awaiting Overhaul construction part, Weight plate is vertically set and is beneficial to the resistance reducing when sinking, float under shield.
As further improvement of the utility model, the outer, bottom at the bottom of described shield is circumferentially with sealing ring.The setting of sealing ring is more conducive to create anhydrous construction environment at the bottom of shield, improves the safety and reliability of steel cofferdam.
As further improvement of the utility model, at the bottom of described shield, be external diameter and become gradually large circular cone shape from top to bottom, described buoyancy tank bottom is provided with and the groove arranging that matches of top at the bottom of described shield.Covering maintenance face that not only can be wider at the bottom of the shield of circular cone shape, and in the time sinking under water at the bottom of shield, at the bottom of hydraulic pressure can make shield, the more firm Awaiting Overhaul that is fixed on is constructed in plane.
As further improvement of the utility model, in described passage, be also provided with the cat ladder that extends to bottom at the bottom of shield.At the bottom of the constructability personnel that arrange of cat ladder pass in and out shield.
As further improvement of the utility model, in described buoyancy tank, be also provided with some reinforcing ribs that are crisscross arranged.Because buoyancy tank need to utilize air pressure draining, inside arranges reinforcing rib can effectively prevent buoyancy tank torsional deformation.
Accompanying drawing explanation
Fig. 1 is the utility model off working state structural representation.
Fig. 2 is the utility model working state structure schematic diagram.
Fig. 3 is the structural representation at the bottom of shield in the utility model.
Fig. 4 is that the A of Fig. 3 is to structural representation.
Wherein, at the bottom of 1 shield; 2 buoyancy tanks; 3 passages; 4 cat ladders; 5 gutters; 6 drainage pumps; 7 buoyancy tank spacer pins; 8 admission valves; 9 outlet valves; 10 paddle holes; 11 sealing rings; 12 Weight plates; 13 mount cable-tie; 14 reinforcing ribs; 15 air compressor machines.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As Figure 1-4, self-floating underwater concrete plane construction steel cofferdam, comprise at the bottom of the shield of coaxial setting 1, buoyancy tank 2 and passage 3,1 hollow and opening down setting at the bottom of shield, passage 3 is arranged at the bottom of shield 1 top and 1 is connected with at the bottom of shield, the bore of passage 3 can be smoothly by being advisable with maintainer, in passage 3, be provided with the cat ladder 4 that extends to 1 bottom at the bottom of shield to facilitate maintainer to pass in and out, in passage 3, be laid with the gutter 5 that stretches into 1 bottom at the bottom of shield, gutter 5 is connected with drainage pump 6, is also provided with buoyancy tank spacer pin 7 on passage 3.Buoyancy tank 2 is sheathed on passage 3 peripheries, with passage 3 matched in clearance, is convenient to buoyancy tank 2 and floats, sinks along passage 3; The top of buoyancy tank 2 is provided with admission valve 8 and outlet valve 9, and admission valve 8 is connected with air compressor machine 15 by appendix, and the bottom of buoyancy tank 2 also offers paddle hole 10.At the bottom of shield, 1 is external diameter and becomes gradually large circular cone shape from top to bottom, and buoyancy tank 2 bottoms are provided with and the groove arranging that matches of 1 top at the bottom of shield.At the bottom of shield, 1 outer, bottom is circumferentially preferably provided with sealing ring 11, and at the bottom of shield, 1 outer wall is circumferentially evenly equipped with some Weight plates 12, and Weight plate 12 is arranged at vertically at the bottom of shield on 1 outer wall and 1 is fixedly connected with at the bottom of shield by mount cable-tie 13.For preventing buoyancy tank 2 torsional deformations, in buoyancy tank 2, be also provided with some reinforcing ribs that are crisscross arranged 14.
The utility model is not limited to above-described embodiment; on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection domain of the present utility model.
Claims (6)
1. a self-floating underwater concrete plane construction steel cofferdam, is characterized in that, at the bottom of comprising hollow and downward opening shield, the top at the bottom of described shield is coaxially provided with the passage that can pass through for personnel, and described passage is connected with at the bottom of shield; The outer coaxial sleeve of described passage is provided with buoyancy tank, and buoyancy tank and described path clearance are equipped with, and is laid with the gutter bottom stretching at the bottom of shield in passage, and described gutter is connected with drainage pump, is also provided with buoyancy tank spacer pin on passage; The top of described buoyancy tank is provided with admission valve and outlet valve, and described admission valve is connected with air compressor machine by appendix, and the bottom of described buoyancy tank also offers paddle hole.
2. self-floating underwater concrete plane construction steel according to claim 1 cofferdam, is characterized in that, at the bottom of described shield, outer wall is circumferentially evenly equipped with some Weight plates, and described Weight plate is arranged at vertically at the bottom of shield on outer wall and is fixedly connected with at the bottom of shield by mount cable-tie.
3. self-floating underwater concrete plane construction steel according to claim 2 cofferdam, is characterized in that, the outer, bottom at the bottom of described shield is circumferentially with sealing ring.
4. according to the self-floating underwater concrete plane construction steel cofferdam described in any one in claim 1-3, it is characterized in that, at the bottom of described shield, be external diameter and become gradually large circular cone shape from top to bottom, described buoyancy tank bottom is provided with and the groove arranging that matches of top at the bottom of described shield.
5. self-floating underwater concrete plane construction steel according to claim 4 cofferdam, is characterized in that, is also provided with the cat ladder that extends to bottom at the bottom of shield in described passage.
6. self-floating underwater concrete plane construction steel according to claim 5 cofferdam, is characterized in that, is also provided with some reinforcing ribs that are crisscross arranged in described buoyancy tank.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201320691841.2U CN203594040U (en) | 2013-11-05 | 2013-11-05 | Self-floating-type steel cofferdam for underwater concrete plane construction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201320691841.2U CN203594040U (en) | 2013-11-05 | 2013-11-05 | Self-floating-type steel cofferdam for underwater concrete plane construction |
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CN203594040U true CN203594040U (en) | 2014-05-14 |
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CN201320691841.2U Expired - Fee Related CN203594040U (en) | 2013-11-05 | 2013-11-05 | Self-floating-type steel cofferdam for underwater concrete plane construction |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109778789A (en) * | 2018-04-04 | 2019-05-21 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of Face Slab of Concrete-faced Rockfill is come to nothing the underwater repair system in area |
-
2013
- 2013-11-05 CN CN201320691841.2U patent/CN203594040U/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109778789A (en) * | 2018-04-04 | 2019-05-21 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of Face Slab of Concrete-faced Rockfill is come to nothing the underwater repair system in area |
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 Termination date: 20181105 |
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CF01 | Termination of patent right due to non-payment of annual fee |