CN106480896A - Open caisson preliminary sedimentation method when large-scale well-sinking sinks - Google Patents
Open caisson preliminary sedimentation method when large-scale well-sinking sinks Download PDFInfo
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- CN106480896A CN106480896A CN201510545116.8A CN201510545116A CN106480896A CN 106480896 A CN106480896 A CN 106480896A CN 201510545116 A CN201510545116 A CN 201510545116A CN 106480896 A CN106480896 A CN 106480896A
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Abstract
The invention discloses open caisson preliminary sedimentation method when large-scale well-sinking sinks, comprise the following steps：Step one, in open caisson manufacture factory site excavation pit；Step 2, caisson wall is poured making molding；Step 3, under the cutting shoe of open caisson laying polylith chock constitute poppet, so that the polylith chock in poppet is arranged symmetrically and be maintained at the same horizontal plane；Step 4, below chock lay sand bedding course；Step 5, when the concrete strength of open caisson reaches design load, remove poppet；Step 6, shoveling in open caisson, make open caisson be sink to below water level in advance.Present invention entirety operation is simple, convenient to carry out, low cost, carries out preliminary sedimentation using mode of once sinking, is easy to postorder and is once sunk and non-drainage subsidence, can improve efficiency of construction, shorten construction period during present invention application, and then easy to utilize.
Description
Technical field
The present invention relates to open caisson preliminary sedimentation method when hydroelectric facility construction technology, specifically large-scale well-sinking are sunk.
Background technology
Drop shaft sinking construction method is widely used in municipal works, is usually used in the engineerings such as intake strucure, drainage pumping plant, large-scale sump, shield and upper pipe working well.For some large-scale well-sinkings, during well sinking, the frictional resistance effect powerful by running into layer of sand, sinks and precipitation is difficult, if still adopting existing well sinking method construction, low construction efficiency, cycle length are it is clear that can cause to have a strong impact on to construction speed.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, there is provided a kind of open caisson preliminary sedimentation method when energy lifting construction efficiency, the large-scale well-sinking sinking of shortening construction period.
The present invention solves the above problems and is achieved through the following technical solutions：Open caisson preliminary sedimentation method when large-scale well-sinking sinks, comprises the following steps：
Step one, in open caisson manufacture factory site excavation pit；
Step 2, caisson wall is poured making molding；
Step 3, under the cutting shoe of open caisson laying polylith chock constitute poppet, so that the polylith chock in poppet is arranged symmetrically and be maintained at the same horizontal plane；
Step 4, below chock lay sand bedding course；
Step 5, when the concrete strength of open caisson reaches design load, remove poppet；
Step 6, shoveling in open caisson, make open caisson be sink to below water level in advance.
Further, in described step one, the depth of foundation ditch is higher than more than level of ground water 0.5m.
Further, described step 2 specifically includes following steps：The first segment cutting shoe of open caisson, second section cutting shoe, Section of three cutting shoe, bottom girder, partition wall gradation are poured molding.The present invention is directed to open caisson build greatly, and total height is high, by the way of segmentation prefabricating, is easy to make molding.
Further, the borehole wall template adopting in described step 2 is Combined type sizing steel form or steel and wood composite template.
Further, described step 5, when implementing, if open caisson is circular open caisson, removes positioning poppet after first taking out rim frame；If open caisson is rectangular open caisson, first takes out the poppet under internal partition wall, more symmetrically extract the poppet under exterior wall two minor face, then symmetrically extract the poppet under long side, finally extract positioning poppet simultaneously.
In sum, the invention has the advantages that：Present invention entirety operation is simple, facilitate implementation, low cost, the present invention is directed to that open caisson frictional resistance, buoyancy are big, the characteristic such as subsidence factor is less than normal, carries out preliminary sedimentation using once sink, be easy to during postorder construction can using inside and outside well all not precipitation, in water shoveling band sink under water and back cover under water construction technology, construction period can be shortened, improve efficiency of construction, easy to utilize.
Specific embodiment
With reference to embodiment, the present invention is done with detailed description further, but embodiments of the present invention not limited to this.
Embodiment：
Open caisson preliminary sedimentation method when large-scale well-sinking sinks, comprises the following steps：Step one, in open caisson manufacture factory site excavation pit；Step 2, caisson wall is poured making molding；Step 3, under the cutting shoe of open caisson laying polylith chock constitute poppet, so that the polylith chock in poppet is arranged symmetrically and be maintained at the same horizontal plane；Step 4, below chock lay sand bedding course；Step 5, when the concrete strength of open caisson reaches design load, remove poppet；Step 6, shoveling in open caisson, make open caisson be sink to below water level in advance.In the present embodiment step one, the depth of foundation ditch is higher than more than level of ground water 0.5m, and the step 2 of the present embodiment specifically includes following steps：The first segment cutting shoe of open caisson, second section cutting shoe, Section of three cutting shoe, bottom girder, partition wall gradation are poured molding.The borehole wall template adopting in step 2 is Combined type sizing steel form or steel and wood composite template, but should ensure that smooth towards concrete surface.
The step 5 of the present embodiment, when implementing, if open caisson is circular open caisson, removes positioning poppet after first taking out rim frame；If open caisson is rectangular open caisson, first takes out the poppet under internal partition wall, more symmetrically extract the poppet under exterior wall two minor face, then symmetrically extract the poppet under long side, finally extract positioning poppet simultaneously.
Above content is to further describe it is impossible to the specific embodiment of the identification present invention is confined to these explanations with reference to what specific preferred implementation was made to the present invention.For general technical staff of the technical field of the invention, the other embodiment that draws under without departing from technical scheme, should be included in protection scope of the present invention.
Claims (5)
1. open caisson preliminary sedimentation method when large-scale well-sinking sinks is it is characterised in that comprise the following steps：
Step one, in open caisson manufacture factory site excavation pit；
Step 2, caisson wall is poured making molding；
Step 3, under the cutting shoe of open caisson laying polylith chock constitute poppet, so that the polylith chock in poppet is arranged symmetrically and be maintained at the same horizontal plane；
Step 4, below chock lay sand bedding course；
Step 5, when the concrete strength of open caisson reaches design load, remove poppet；
Step 6, shoveling in open caisson, make open caisson be sink to below water level in advance.
2. open caisson preliminary sedimentation method when large-scale well-sinking according to claim 1 sinks is it is characterised in that the depth of foundation ditch is higher than more than level of ground water 0.5m in described step one.
3. open caisson preliminary sedimentation method when large-scale well-sinking according to claim 1 sinks is it is characterised in that described step 2 specifically includes following steps：The first segment cutting shoe of open caisson, second section cutting shoe, Section of three cutting shoe, bottom girder, partition wall gradation are poured molding.
4. open caisson preliminary sedimentation method when large-scale well-sinking according to claim 1 sinks is it is characterised in that the borehole wall template adopting in described step 2 is Combined type sizing steel form or steel and wood composite template.
5. the open caisson preliminary sedimentation method when large-scale well-sinking according to any one in Claims 1 to 4 sinks, it is characterised in that described step 5 is when implementing, if open caisson is circular open caisson, removes positioning poppet after first taking out rim frame；If open caisson is rectangular open caisson, first takes out the poppet under internal partition wall, more symmetrically extract the poppet under exterior wall two minor face, then symmetrically extract the poppet under long side, finally extract positioning poppet simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545116.8A CN106480896A (en) | 2015-08-31 | 2015-08-31 | Open caisson preliminary sedimentation method when large-scale well-sinking sinks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545116.8A CN106480896A (en) | 2015-08-31 | 2015-08-31 | Open caisson preliminary sedimentation method when large-scale well-sinking sinks |
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| CN106480896A true CN106480896A (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510545116.8A Pending CN106480896A (en) | 2015-08-31 | 2015-08-31 | Open caisson preliminary sedimentation method when large-scale well-sinking sinks |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331000A (en) * | 2018-01-09 | 2018-07-27 | 中交烟台环保疏浚有限公司 | Caisson sinking construction method |
| CN108951677A (en) * | 2018-07-04 | 2018-12-07 | 岩土科技股份有限公司 | The open caisson construction method of the muck soil position underground space |
-
2015
- 2015-08-31 CN CN201510545116.8A patent/CN106480896A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331000A (en) * | 2018-01-09 | 2018-07-27 | 中交烟台环保疏浚有限公司 | Caisson sinking construction method |
| CN108951677A (en) * | 2018-07-04 | 2018-12-07 | 岩土科技股份有限公司 | The open caisson construction method of the muck soil position underground space |
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Application publication date: 20170308 |