CN103526765A - Self-floating steel cofferdam for underwater concrete plane construction - Google Patents
Self-floating steel cofferdam for underwater concrete plane construction Download PDFInfo
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- CN103526765A CN103526765A CN201310540199.2A CN201310540199A CN103526765A CN 103526765 A CN103526765 A CN 103526765A CN 201310540199 A CN201310540199 A CN 201310540199A CN 103526765 A CN103526765 A CN 103526765A
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Abstract
The invention discloses a self-floating steel cofferdam for underwater concrete plane construction. The self-floating steel cofferdam aims to solve the problem that an anhydrous construction environment is difficult to create for underwater engineering inspection and maintenance in the prior art. The self-floating steel cofferdam comprises a hollow shield bottom with a downward opening, a channel capable of allowing personnel to pass is coaxially arranged at the top of the shield bottom, and the channel is communicated with the shield bottom. The channel is coaxially sleeved with a buoyancy tank, the buoyancy tank is in clearance fit with the channel, a drainage pipe stretching into the bottom of the shield bottom is laid in the channel, the drainage pipe is connected with a drainage pump, and a buoyancy tank limit pin is further arranged on the channel. An air inlet valve and an exhaust valve are arranged at the top of the buoyancy tank, the air inlet valve is connected with an air compressor through an air conveying pipe, and water inlet and outlet holes are further formed in the bottom of the buoyancy tank. The buoyancy tank is used for controlling the shield bottom to sink and float, and the self-floating steel cofferdam can create the anhydrous inspection and construction environment in cooperation with a drainage device, and has the advantages of being simple in operation, convenient to move, low in investment cost and capable of being widely applied to the inspection and maintenance projects of the bottom plates, the stilling pool aprons and underwater positions of water gates and other hydraulic structures.
Description
Technical field
The present invention relates to a kind of construction equipment of plane 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 building is 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 those running times longer hydraulic structure, 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 for concrete defect, just seem extremely important, how to take effective restorative procedure to prevent and treat the very big concern that concrete defect has caused hydroelectric project circle, become the current urgent problem of hydropower industry.
For the repair materials of concrete defect, have 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.
Generally underwater concrete maintenance and inspection mainly adopt steel sheet-pile cofferdam and Double-Wall Steel Boxed Cofferdam to construct, 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.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of self-floating underwater concrete plane construction steel cofferdam is provided, can create local anhydrous construction environment and conveniently moving, simple to operate, with low cost.
The object of the present invention is achieved like this: 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 present invention is when 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; When needs maintenance construction, by the mode manually pulling, the present invention 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 invention has the beneficial effects as follows: 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 present invention can be widely used in the underwater sites such as the base plate, absorption basin protection-apron of the hydraulic structures such as sluice and check in repairing work.
As a further improvement on the present invention, 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, floating under shield.
As a further improvement on the present invention, 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 a further improvement on the present invention, be external diameter and become gradually large circular cone shape from top to bottom at the bottom of described shield, described buoyancy tank bottom is provided with the groove that matches and arrange with 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 when 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 a further improvement on the present invention, 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 a further improvement on the present invention, 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 off working state structural representation of the present invention.
Fig. 2 is working state structure schematic diagram of the present invention.
Fig. 3 is the structural representation at the bottom of shield in the present invention.
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 present invention 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 extend to 1 bottom at the bottom of shield cat ladder 4 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 along passage 3 floatings, sinking; 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 the groove that matches and arrange with 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 present invention is not limited to above-described embodiment; on the basis of technical scheme disclosed by the invention; 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 scope of the present invention.
Claims (6)
1. 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 the groove that matches and arrange with 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 |
|---|---|---|---|
| CN201310540199.2A CN103526765A (en) | 2013-11-05 | 2013-11-05 | Self-floating steel cofferdam for underwater concrete plane construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310540199.2A CN103526765A (en) | 2013-11-05 | 2013-11-05 | Self-floating steel cofferdam for underwater concrete plane construction |
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| CN103526765A true CN103526765A (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310540199.2A Pending CN103526765A (en) | 2013-11-05 | 2013-11-05 | Self-floating steel cofferdam for underwater concrete plane construction |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213570A (en) * | 2014-07-17 | 2014-12-17 | 北京翔鲲水务建设有限公司 | Construction method of underwater closed cofferdam |
| CN108729485A (en) * | 2018-05-31 | 2018-11-02 | 江苏核电有限公司 | A kind of sea work intake bottom silt wiping tool |
| CN109083174A (en) * | 2018-10-25 | 2018-12-25 | 南水北调中线干线工程建设管理局 | It is a kind of can the quickly in place and monoblock type cofferdam removed and its construction method |
| CN109795636A (en) * | 2019-03-13 | 2019-05-24 | 美钻深海能源科技研发（上海）有限公司 | A kind of caisson type drilling platforms |
| CN110029629A (en) * | 2019-05-23 | 2019-07-19 | 黄河水利委员会河南黄河河务局 | Harden the damaged underwater prosthetic device of channel and application method |
| CN113529666A (en) * | 2021-06-29 | 2021-10-22 | 中国船舶科学研究中心 | Sealing device and sealing method for underwater irregular surface |
| CN115180101A (en) * | 2021-04-07 | 2022-10-14 | 浙江华东建设工程有限公司 | Underwater local dry land maintenance method and system |
-
2013
- 2013-11-05 CN CN201310540199.2A patent/CN103526765A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213570A (en) * | 2014-07-17 | 2014-12-17 | 北京翔鲲水务建设有限公司 | Construction method of underwater closed cofferdam |
| CN104213570B (en) * | 2014-07-17 | 2016-08-10 | 北京翔鲲水务建设有限公司 | Close the construction method in cofferdam under water |
| CN108729485A (en) * | 2018-05-31 | 2018-11-02 | 江苏核电有限公司 | A kind of sea work intake bottom silt wiping tool |
| CN109083174A (en) * | 2018-10-25 | 2018-12-25 | 南水北调中线干线工程建设管理局 | It is a kind of can the quickly in place and monoblock type cofferdam removed and its construction method |
| CN109795636A (en) * | 2019-03-13 | 2019-05-24 | 美钻深海能源科技研发（上海）有限公司 | A kind of caisson type drilling platforms |
| CN110029629A (en) * | 2019-05-23 | 2019-07-19 | 黄河水利委员会河南黄河河务局 | Harden the damaged underwater prosthetic device of channel and application method |
| CN115180101A (en) * | 2021-04-07 | 2022-10-14 | 浙江华东建设工程有限公司 | Underwater local dry land maintenance method and system |
| CN113529666A (en) * | 2021-06-29 | 2021-10-22 | 中国船舶科学研究中心 | Sealing device and sealing method for underwater irregular surface |
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Application publication date: 20140122 |