CN106480895A - A kind of large-scale well-sinking non-drainage subsidence construction technology - Google Patents
A kind of large-scale well-sinking non-drainage subsidence construction technology Download PDFInfo
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- CN106480895A CN106480895A CN201510545100.7A CN201510545100A CN106480895A CN 106480895 A CN106480895 A CN 106480895A CN 201510545100 A CN201510545100 A CN 201510545100A CN 106480895 A CN106480895 A CN 106480895A
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- sinking
- open caisson
- water
- construction technology
- well
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Abstract
The invention discloses a kind of large-scale well-sinking non-drainage subsidence construction technology, comprise the following steps：Step one, pre-cast sink well, caisson wall is poured making molding；Step 2, well sinking, cut the earth in open caisson, make open caisson be sink to below water level in advance, and inhale sand using inhaling sand system；Step 3, after open caisson sinks to designed elevation, carry out underwater concrete back cover.Present invention entirety operation is simple, convenient to carry out, low cost, during present invention application by the way of once sinking and non-drainage subsidence, can improve efficiency of construction, shorten construction period, and then easy to utilize.
Description
Technical field
The present invention relates to hydroelectric facility construction technology, specifically a kind of large-scale well-sinking non-drainage subsidence construction technology.
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 energy lifting construction efficiency, a kind of large-scale well-sinking non-drainage subsidence construction technology of shortening construction period.
The present invention solves the above problems and is achieved through the following technical solutions：A kind of large-scale well-sinking non-drainage subsidence construction technology, comprises the following steps：
Step one, pre-cast sink well, caisson wall is poured making molding；
Step 2, well sinking, cut the earth in open caisson, make open caisson be sink to below water level in advance, and inhale sand using inhaling sand system；
Step 3, after open caisson sinks to designed elevation, carry out underwater concrete back cover.
Further, described step one 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, described suction sand system includes sand sucker group, water charging system, electric power system, sand water discharge spout road and mortar sedimentation tank.During present invention application, the motor of sand sucker group should maintain a certain distance with the water surface, prevent current from entering motor, cause short circuit；Impeller to be ensured is operationally all the time below the water surface simultaneously, it is to avoid sky is taken out.
Further, described step 2 also includes pouring water into pit shaft, keeps water level in pit shaft to be higher than level of ground water.It is higher than level of ground water that the present invention makes water level in pit shaft in construction, is avoided that generation quicksand phenomenon.
Further, in described pit shaft, water level and the water-head of level of ground water are not less than 0.5m.
Further, described step 3 observes 6～8 hours after open caisson sinks to designed elevation, if open caisson adds up deflection and is not more than 10mm, then carries out underwater concrete back cover.
In sum, the invention has the advantages that：Present invention entirety operation is simple, facilitate implementation, low cost, the present invention is big for open caisson frictional resistance, buoyancy, the characteristic such as subsidence factor is less than normal, by the way of once sinking, and for water yield in open caisson is big, level of ground water is high, by the way of non-drainage subsidence, i.e. the present invention adopt in implementation process 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：
A kind of large-scale well-sinking non-drainage subsidence construction technology, comprises the following steps：Step one, pre-cast sink well, caisson wall is poured making molding；Step 2, well sinking, cut the earth in open caisson, make open caisson be sink to below water level in advance, and inhale sand using inhaling sand system；Step 3, after open caisson sinks to designed elevation, carry out underwater concrete back cover.In the present embodiment, step one 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 suction sand system of the present embodiment includes sand sucker group, water charging system, electric power system, sand water discharge spout road and mortar sedimentation tank.The step 2 of the present embodiment also includes pouring water into pit shaft, keeps water level in pit shaft to be higher than level of ground water, and wherein, in pit shaft, water level and the water-head of level of ground water are not less than 0.5m.
The present embodiment, in implementation steps three, observes 6～8 hours after open caisson sinks to designed elevation, if open caisson adds up deflection and is not more than 10mm, then carries out underwater concrete back cover.The present embodiment, in implementation steps three, keeps water level in well to be not less than the outer water level of well, the selection of concrete pay the utmost attention to using have early strong, slow setting, separate under impervious, water resistant, the concrete of the performance such as the slump is larger.Pouring underwater concrete, is carried out using tremie method or pumping method, and ensures that continuously poured in one finishes, and notes should continuously adding into pipe concrete in pouring simultaneously, and concreting carries out tube drawing and should accomplish that average rate is pulled out slowly after finishing.When under water, bottom concrete reaches design code intensity, and when open caisson meets anti-floating requirement, can be from open caisson draining from inside to outside.After water in well is extracted out, should check whether bottom concrete has at percolating water, if any repairing in time, then by the loose removing leveling of concrete surface.
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 (6)
1. a kind of large-scale well-sinking non-drainage subsidence construction technology is it is characterised in that comprise the following steps：
Step one, pre-cast sink well, caisson wall is poured making molding；
Step 2, well sinking, cut the earth in open caisson, make open caisson be sink to below water level in advance, and inhale sand using inhaling sand system；
Step 3, after open caisson sinks to designed elevation, carry out underwater concrete back cover.
2. a kind of large-scale well-sinking non-drainage subsidence construction technology according to claim 1 is it is characterised in that described step one 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.
3. a kind of large-scale well-sinking non-drainage subsidence construction technology according to claim 1 is it is characterised in that described suction sand system includes sand sucker group, water charging system, electric power system, sand water discharge spout road and mortar sedimentation tank.
4. a kind of large-scale well-sinking non-drainage subsidence construction technology according to claim 1, it is characterised in that described step 2 also includes pouring water into pit shaft, keeps water level in pit shaft to be higher than level of ground water.
5. a kind of large-scale well-sinking non-drainage subsidence construction technology according to claim 4 is it is characterised in that water level and the water-head of level of ground water are not less than 0.5m in described pit shaft.
6. a kind of large-scale well-sinking non-drainage subsidence construction technology according to any one in Claims 1 to 5, it is characterized in that, described step 3 observes 6～8 hours after open caisson sinks to designed elevation, if open caisson adds up deflection and is not more than 10mm, then carries out underwater concrete back cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545100.7A CN106480895A (en) | 2015-08-31 | 2015-08-31 | A kind of large-scale well-sinking non-drainage subsidence construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545100.7A CN106480895A (en) | 2015-08-31 | 2015-08-31 | A kind of large-scale well-sinking non-drainage subsidence construction technology |
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| Publication Number | Publication Date |
|---|---|
| CN106480895A true CN106480895A (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510545100.7A Pending CN106480895A (en) | 2015-08-31 | 2015-08-31 | A kind of large-scale well-sinking non-drainage subsidence construction technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268650A (en) * | 2017-07-28 | 2017-10-20 | 马鞍山钢铁建设集团有限公司 | A kind of industrial swirling flow precipitates pool structure not drainage open caisson method |
| CN107882043A (en) * | 2017-10-25 | 2018-04-06 | 上海市基础工程集团有限公司 | The multi-functional floating platform of linkage in well |
-
2015
- 2015-08-31 CN CN201510545100.7A patent/CN106480895A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268650A (en) * | 2017-07-28 | 2017-10-20 | 马鞍山钢铁建设集团有限公司 | A kind of industrial swirling flow precipitates pool structure not drainage open caisson method |
| CN107882043A (en) * | 2017-10-25 | 2018-04-06 | 上海市基础工程集团有限公司 | The multi-functional floating platform of linkage in well |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170308 |
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| WD01 | Invention patent application deemed withdrawn after publication |