CN206457835U - A kind of open caisson - Google Patents
A kind of open caisson Download PDFInfo
- Publication number
- CN206457835U CN206457835U CN201621494821.6U CN201621494821U CN206457835U CN 206457835 U CN206457835 U CN 206457835U CN 201621494821 U CN201621494821 U CN 201621494821U CN 206457835 U CN206457835 U CN 206457835U
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- CN
- China
- Prior art keywords
- layer
- concrete
- back cover
- open caisson
- pan
- 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.)
- Expired - Fee Related
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Abstract
The utility model is related to a kind of open caisson, including well bore and the bottom of a pan below well bore, it is characterised in that filling filtering layer of the bottom of a pan provided with one layer of backfill rubble formation, filling filtering layer is provided with one layer of back cover concrete layer.The open caisson that the utility model is provided, one layer of filling filtering layer has been backfilled with rubble on the bottom of a pan, make during follow-up concrete transfers and to form back cover concrete layer, silt particle is prevented to be mixed into back cover concrete layer, difficulty of construction is reduced, more preferably, filling filtering layer reduces the volume of back cover concrete layer to bottom sealing effect simultaneously, concrete consumption is reduced, cost is greatly reduced.
Description
Technical field
The utility model is related to sink well technique, particularly a kind of to use the new open caisson open caisson that bottom sealing method is obtained under water.
Background technology
It is not drainage method that the commonly used construction method of open caisson is built in poor strata, but back cover is heavy again under water
The key of well construction.Because existing back cover under water is to use rigid conduit method, this method complicated construction technique, cost are high, water
Lower back cover effect is difficult to ensure that, certain limitation is received to the application that drop shaft sinking is constructed.Back cover is applied under water for current open caisson construction
Work technique also occurs in that many problems in engineering construction, and such as leak, back cover difficulty of construction are larger, cost is high, and it is heavy to have impact on
The use of well construction method.
Using rigid conduit method carry out underwater concrete back cover when, back cover need to conduit radical and spacing should be made by conduit
Determined with radius and back cover area.The order of many tremie concretes makes each not occur concrete sandwich as principle
The concrete that conduit is poured into a mould simultaneously keeps roughly the same absolute altitude.The first batch of amount of concrete of every catheter perfusion should be computed really
It is fixed.This method need to set up an operation platform in well head and fix each conduit, also be removed after having constructed, this virtually adds and applied
Work process and construction cost.
Perfusion Underwater Concrete is the concrete consumption cost increase due to open caisson the bottom of a pan significant increase since the open caisson the bottom of a pan, in addition,
There is substantial amounts of silt particle in the open caisson the bottom of a pan when carrying out Underwater Concrete back cover, and concrete very capacity is mixed into silt particle formation interlayer, causes back cover to construct
Difficulty is larger, back cover effect is poor.
The content of the invention
In order to solve the above mentioned problem that above-mentioned bottom sealing method is present, open caisson water is used the utility model proposes one kind
The open caisson that lower bottom sealing method is obtained, reducing difficulty of construction, improving back cover effect and reducing construction cost.
To achieve these goals, the utility model provides a kind of open caisson, including well bore and the bottom of a pan below well bore,
Characterized in that, filling filtering layer of the bottom of a pan provided with one layer of backfill rubble formation, filling filtering layer is provided with one layer of back cover concrete layer
The open caisson that the utility model is provided, has backfilled one layer of filling filtering layer on the bottom of a pan with rubble, makes follow-up concrete decentralization shape
During back cover concrete layer, prevent silt particle from being mixed into back cover concrete layer, reduce difficulty of construction, bottom sealing effect more preferably, is filled
Filtering layer reduces the volume of back cover concrete layer simultaneously, reduces concrete consumption, greatly reduces cost.
Brief description of the drawings
Fig. 1 to Fig. 3 is open caisson bottom sealing method work progress state diagram under water；
Fig. 4 is the caisson structure schematic diagram that open caisson bottom sealing method construction under water is completed.
The utility model is described in further detail below in conjunction with the accompanying drawings.
Embodiment
Referring to Fig. 1 to Fig. 3, open caisson bottom sealing method three below step under water.
(1) in place, the structure of well bore 1 is common open caisson construction method use to the non-drainage subsidence of well bore 1 prefabricated
Position of the waterline 7 in well bore 1 be as shown in the figure in well bore, well.
(2) has dug the open caisson the bottom of a pan 2 in the bottom of well bore 1, and the bottom of a pan 2 is as the bottom of a pan of common open caisson construction method, with broken
Stone backfills the bottom of a pan 2, forms filling filtering layer 3, fills the top surface of filtering layer 3 at the pin of the basil 11 of well bore 1, fills the top surface of filtering layer 3
It is substantially smooth.
(3) routinely Underwater Concrete Construction methods, the concrete delivery pipe 5 of automotive pump are put into well bore 1, the discharging of concrete delivery pipe 5
The discharging opening of concrete delivery pipe 5 is embedded in concrete by top surface about 100-300mm, the preferably 200mm of mouth distance filling filtering layer 3, decentralization concrete
It is interior, when concrete face reaches back cover concrete layer thickness, concrete delivery pipe 5 slowly is moved horizontally while concrete is transferred, when concrete delivery pipe 5 is moved
To local concrete face reach back cover concrete layer thickness, slowly move horizontally concrete delivery pipe while concrete is transferred, until filling filtering layer 3
One layer of back cover concrete layer 4 of upper formation.Whole back cover concrete layer 4 is in well bore 1.
The open caisson obtained using the bottom sealing method construction under water of above-mentioned open caisson is as shown in figure 4, including well bore 1 and under well bore 1
The bottom of a pan 2 of side, filling filtering layer 3 of the bottom of a pan 2 provided with one layer of backfill rubble formation, filling filtering layer 3 is provided with one layer of back cover concrete layer
4.The top surface of filtering layer 3 is filled at the pin of the basil 11 of well bore 1, the top surface for filling filtering layer 3 is substantially smooth, and back cover concrete layer 4 is in well bore 1
It is interior.
Open caisson bottom sealing method under water, has backfilled one layer of filling filtering layer with rubble on the bottom of a pan, has made follow-up concrete transfer to form envelope
During the concrete layer of bottom, prevent silt particle from being mixed into back cover concrete layer, reduce difficulty of construction, bottom sealing effect more preferably, fills filtering layer
The volume of back cover concrete layer is reduced simultaneously, is reduced concrete consumption, is greatly reduced cost.During concrete is transferred, concrete conveying
The discharging opening of pipe is embedded in concrete all the time, prevents water from entering in concrete so that the better quality of back cover concrete layer.With rigid conduit method under water
Back cover is compared, and bottom sealing method does not need well head to set up an operation platform to the utility model open caisson under water, solves and is led for rigidity
Tube method under water install, remove the complicated problem of wellhead platform construction by bottom closing construction process, and economic benefit is apparent.
Claims (3)
1. a kind of open caisson, including well bore and the bottom of a pan below well bore, it is characterised in that the bottom of a pan is provided with one layer of backfill gravel
Into filling filtering layer, filling filtering layer is provided with one layer of back cover concrete layer.
2. open caisson according to claim 1, it is characterised in that the top surface of the filling filtering layer at the basil pin of well bore,
Back cover concrete layer is in well bore.
3. open caisson according to claim 2, it is characterised in that the top surface of the filling filtering layer is substantially smooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621494821.6U CN206457835U (en) | 2016-12-31 | 2016-12-31 | A kind of open caisson |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621494821.6U CN206457835U (en) | 2016-12-31 | 2016-12-31 | A kind of open caisson |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206457835U true CN206457835U (en) | 2017-09-01 |
Family
ID=59696845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621494821.6U Expired - Fee Related CN206457835U (en) | 2016-12-31 | 2016-12-31 | A kind of open caisson |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206457835U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638647A (en) * | 2016-12-31 | 2017-05-10 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Underwater sunk shaft sealing method and sunk shaft |
| CN108824469A (en) * | 2018-07-05 | 2018-11-16 | 浙江科技学院 | A kind of device and its reinforcement means for reinforcing bottom sealing |
-
2016
- 2016-12-31 CN CN201621494821.6U patent/CN206457835U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638647A (en) * | 2016-12-31 | 2017-05-10 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Underwater sunk shaft sealing method and sunk shaft |
| CN108824469A (en) * | 2018-07-05 | 2018-11-16 | 浙江科技学院 | A kind of device and its reinforcement means for reinforcing bottom sealing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170901 Termination date: 20211231 |