CN105178289B - Precast dewatering pile tube and its application method in building foundation pit - Google Patents
Precast dewatering pile tube and its application method in building foundation pit Download PDFInfo
- Publication number
- CN105178289B CN105178289B CN201510654291.0A CN201510654291A CN105178289B CN 105178289 B CN105178289 B CN 105178289B CN 201510654291 A CN201510654291 A CN 201510654291A CN 105178289 B CN105178289 B CN 105178289B
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- Prior art keywords
- pile tube
- precast dewatering
- precast
- dewatering pile
- tube
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Abstract
Invention is related to precast dewatering pile tube and its application method in a kind of building foundation pit, and the precast dewatering pile tube is hollow cylindrical shape, including tube wall and taper pile top, and the top of the tube wall has been spaced multiple permeable holes.Cartridge filter, and the upper end open of the cartridge filter, lower end closed are provided with inside the precast dewatering pile tube.The application method of precast dewatering pile tube comprises the following steps successively：(1) previously fabricated precast dewatering pile tube；(2) total quantity, the arrangement spacing of the precast dewatering pile tube are determined；(3) precast dewatering pile tube is installed, and water filling cleaning is carried out by root；(4) immersible pump and outlet pipe are put into the precast dewatering pile tube；(5) stop immersible pump drawing water, borehole cleaning, cement injection mortar, part of cement mortar by permeable hole to exosmosis and with soil solidifying outside the precast dewatering pile tube.Present invention reduces the tube well construction duration, while precast dewatering pile tube is changed into uplift pile, the anti-floating performance of precast dewatering pile tube is improved.
Description
Technical field
The present invention relates to the realm of building construction, and in particular to be precast dewatering pile tube and its to be used in a kind of building foundation pit
Method.
Background technology
In correlation technique, well-point dewatering method is a kind of method of artificial dewatering, because well-point dewatering method is applicable
In the construction environment that level of ground water is higher or precipitation is more, digging base is unstable compared with deep, crater wall, the earthwork is now widely used in
In engineering.Before excavation of foundation pit, precipitation pipe well and embedded well-point pipe are made in the drilling of foundation ditch surrounding, dewatering construction workload is big, and drop
Well-point pipe is thrown aside after water is completed, and causes the waste of resource.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide precast dewatering pile tube and its application method in building foundation pit, solution
Certainly dewatering construction workload is big, and well-point pipe is thrown aside after the completion of base pit dewatering, causes the technical problem of the wasting of resources.
In order to solve the above technical problems, the technical solution adopted by the present invention is divided into precast dewatering pile tube and institute in building foundation pit
State the application method of precast dewatering pile tube.
The precast dewatering pile tube is a kind of engineering pile, is hollow cylindrical shape, including tube wall and taper pile top, the pipe
The top of wall has been spaced multiple permeable holes.The cartridge filter of hollow cylindrical, and institute are provided with inside the precast dewatering pile tube
The underground water stated outside the upper end open of cartridge filter, lower end closed, the precast dewatering pile tube enters precast dewatering by permeable hole
In pile tube, enter after the filtering of cartridge filter in the cartridge filter, and the silt in underground water is intercepted in the tube wall
Between surface and cartridge filter.
The precast dewatering pile tube carries out borehole cleaning, slip casting after construction is finished to it, treats that part of cement slurry passes through permeable hole
Permeate and with soil solidifying outside the precast dewatering pile tube, the precast dewatering pile tube is changed into uplift pile, for foundation ditch provides enough
Enough supports, improve the anti-floating performance of precast dewatering pile tube.
Preferably, the cross section of the permeable hole is horn-like, and cross section outer surface of the diameter along tube wall to interior
Surface direction is gradually decreased.
Preferably, the external diameter of the permeable hole is 20mm, internal diameter is 8mm.
Preferably, the permeable hole is arranged in the area from the upper table of precast dewatering pile tube 40cm~60cm downwards
In domain.
Preferably, the permeable hole uses prefabricated mould pore-forming.
Preferably, the inner surface of the taper pile top is provided with fixture, the cartridge filter is by connecting the fixture
It is fixed in the precast dewatering pile tube.
Preferably, the lower end of the cartridge filter is the taper that size matches with the taper pile top, the cartridge filter
Lower end be embedded in the taper pile top, so that cartridge filter is fixed in the precast dewatering pile tube.
The application method of precast dewatering pile tube, comprises the following steps successively in building foundation pit：(1) previously fabricated precast dewatering
Pile tube, the diameter of the precast dewatering pile tube is determined according to the size of site operation environment and required draining pump；(2) base area is surveyed
Report and Foundation Pit Support Design file, determine total quantity, the arrangement spacing of the precast dewatering pile tube；(3) precast dewatering is installed
Pile tube, and water filling cleaning is carried out by root to the precast dewatering pile tube；(4) immersible pump is put into the precast dewatering pile tube and is gone out
Water pipe, is first tested, and determines that the precast dewatering pile tube can formally proceed by draining operating after normal pumping, draining；(5)
Construction finish after, stop immersible pump drawing water, carry out borehole cleaning processing, cement injection mortar, part of cement mortar by permeable hole to
Exosmosis and with soil solidifying outside the precast dewatering pile tube.
Preferably, precast dewatering pile tube installation site is away from structural column and shear wall described in step (3).
Preferably, the upper surface of precast dewatering pile tube described in step (5) has poured bottom board concrete, the bottom board concrete closing
The precast dewatering pile tube.
Beneficial effects of the present invention：The precast dewatering pile tube on engineering pile basis is inserted directly into foundation ditch by the present invention, is formed
Well casing is installed while pipe well, the construction procedure for carrying out well casing installation again in foundation ditch internal drilling is save, shortens tube well construction work
Phase.The mud of construction pipe well is a part for construction rubbish, and base is inserted directly into using the precast dewatering pile tube for belonging to engineering tubular pile
Precipitation is carried out in hole can efficiently reduce the discharge of mud, reduce the influence to environment, realize civilized construction, green construction.
In addition, construction finish after, to precast dewatering pile tube carry out borehole cleaning, slip casting, part of cement mortar by permeable hole to exosmosis simultaneously
With soil solidifying outside the precast dewatering pile tube, precast dewatering pile tube is changed into uplift pile, enough supports are provided for foundation ditch, carried
The high anti-floating performance of precast dewatering pile tube.
Brief description of the drawings
Invention is described further using accompanying drawing, but the embodiment in accompanying drawing does not constitute any limitation of the invention,
For one of ordinary skill in the art, on the premise of not paying creative work, it can also be obtained according to the following drawings
Its accompanying drawing.
Structural representation when Fig. 1 is draining of the present invention.
Structural representation when Fig. 2 is present invention shut-in well.
Reference：1st, precast dewatering pile tube, 2, permeable hole, 3, immersible pump, 4, outlet pipe, 5, underground water, 6, bottom board concrete,
7th, slip casing by pressure pipe, 8, cement mortar, 11, pervious bed, 12, impermeable stratum.
Embodiment
The invention will be further described with the following Examples.
Precast dewatering pile tube in building foundation pit, as shown in figure 1, the precast dewatering pile tube 1 is hollow cylindrical shape, including
Tube wall and taper pile top.The top of the tube wall has been spaced multiple permeable holes 2.In the present embodiment, the permeable hole
Cross section is horn-like, and outer surface to inner surface direction of the diameter along tube wall of cross section is gradually decreased, the permeable hole
External diameter is 20mm, and internal diameter is 8mm, is easy to underground water 5 to be rapidly discharged into precast dewatering pile tube 1.
General soil horizon is divided into pervious bed 11 and impermeable stratum 12, and underground water 5 is focused primarily upon in pervious bed 11, squeezed into
After the precast dewatering pile tube 1, the permeable hole 2 is entirely located in pervious bed 11, can make it that the efficiency of drawing water of permeable hole 2 is maximum
Change, so as to farthest reduce the content of base mine water 5.In the present embodiment, the permeable hole 2 is arranged in from described pre-
The upper table of precipitation pile tube 1 processed is downwards in 40cm~60cm region.Now, the permeable hole 2 is entirely located in pervious bed 11,
And under foundation ditch 40cm~60cm depth influence of the underground water to foundation ditch it is maximum, drain the region moisture can permeable hole 2 compared with
Influence of the underground water 5 to foundation ditch is substantially reduced in the case of few, realizes that efficiency is maximized.
The inside of precast dewatering pile tube 1 is provided with the cartridge filter of hollow cylindrical, and the upper end open of the cartridge filter, under
End seal is closed, and the underground water 5 outside the precast dewatering pile tube 1 is entered in precast dewatering pile tube 1 by permeable hole 2, by cartridge filter
Filtering after enter in the cartridge filter, and the silt in underground water 5 is intercepted between the inner surface and cartridge filter of the tube wall.
In order to prevent cartridge filter from being floated in filtering, filter efficiency is influenceed, in the present embodiment, the inner surface of the taper pile top is provided with
Fixture, when manufacturing the precast dewatering pile tube 1, the cartridge filter is fixed on described prefabricated beforehand through the connection fixture
In precipitation pile tube 1.In another embodiment, the lower end of the cartridge filter is the cone that size matches with the taper pile top
Shape, when manufacturing the precast dewatering pile tube 1, the lower end of the cartridge filter is embedded in the taper pile top, so that will filtering
Cylinder is fixed in the precast dewatering pile tube 1.
The application method of precast dewatering pile tube, comprises the following steps successively in building foundation pit：
(1) previously fabricated precast dewatering pile tube 1, according to being determined the size of site operation environment and required immersible pump 3
The diameter of precast dewatering pile tube 1.Manufacture before precast dewatering pile tube 1, pile tube hole size is considered first, it is ensured that immersible pump 3 can
It is convenient and swift to be put into and reclaim.Secondly, the permeable hole 2 of the precast dewatering pile tube 1 should be opened in the range of pervious bed 11, permeable
Hole 2 is made horn-like of prefabricated mould, and outer surface to inner surface direction of the diameter along tube wall of cross section gradually decrease.Institute
The external diameter for stating permeable hole 2 is 20mm, and internal diameter is 8mm, and permeable hole 2 arranges 4, the permeable hole 2 along the circle of precast dewatering pile tube 1 one
It is arranged in from the upper table of the precast dewatering pile tube 1 downwards 40cm~60cm region.
(2) report and Foundation Pit Support Design file are surveyed in base area, determine total quantity, the arrangement of the precast dewatering pile tube 1
Spacing.
(3) precast dewatering pile tube 1 is installed, tried one's best when the precast dewatering pile tube 1 is installed away from structural column and shear wall.It is right
The precast dewatering pile tube 1 carries out water filling cleaning by root, untill flowing out clear water, it is to avoid occur " dried-up well ".
(4) immersible pump 3 and outlet pipe 4 are put into the precast dewatering pile tube 1, the connection immersible pump 3 of outlet pipe 4 will be described
Outside underground water discharge foundation ditch in precast dewatering pile tube 1.Tested first before running well, determine the precast dewatering pile tube
1 whether can normal pumping, draining, whether there is the phenomenons such as gas leakage, blocking appearance.The formal work of drawing water of input after test is normal.
(5) construction is shunt in a well after finishing by the bottom board concrete set in the upper surface of precast dewatering pile tube 1, according to bottom plate
Concrete construction speed closes precast dewatering pile tube 1 one by one.Set before bottom board concrete, stop immersible pump 3 first and draw water.Due to precast dewatering
The bottom deposit of pile tube 1 has substantial amounts of mud, thus it is quick after stopping pumping carry out borehole cleaning processing, cement injection mortar 8 is such as schemed
Shown in 2, part of cement mortar 8 by permeable hole 2 to exosmosis and with the outer soil solidifying of the precast dewatering pile tube 1, will be prefabricated
Precipitation pile tube 1 is closely connected with soil layer, is solved the problem of periphery pervious bed 11 loosens caused by Precipitation Process.Finally perform bottom plate
Concrete, closing precast dewatering pile tube 1, is changed into uplift pile by precast dewatering pile tube 1 and uses, enough supports are provided for foundation ditch, improves
The anti-floating performance of precast dewatering pile tube.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than to present invention guarantor
The limitation of scope is protected, although being explained with reference to preferred embodiment to the present invention, one of ordinary skill in the art should
Work as understanding, technical scheme can be modified or equivalent substitution, without departing from the reality of technical solution of the present invention
Matter and scope.
Claims (10)
1. precast dewatering pile tube in a kind of building foundation pit, it is characterised in that the precast dewatering pile tube is a kind of engineering pile, in being
Empty cylindrical shape, including tube wall and taper pile top, the top of the tube wall has been spaced multiple permeable holes；The precast dewatering
The cartridge filter of hollow cylindrical, and the upper end open of the cartridge filter, lower end closed, the precast dewatering pipe are provided with inside pile tube
Underground water outside stake is entered in precast dewatering pile tube by permeable hole, is entered after the filtering of cartridge filter in the cartridge filter,
And the silt in underground water is intercepted between the inner surface and cartridge filter of the tube wall；The precast dewatering pile tube is finished in construction
Afterwards, borehole cleaning, slip casting are carried out to it, treats that part of cement slurry is permeated and solid with the soil body outside the precast dewatering pile tube by permeable hole
Knot, is used as uplift pile.
2. precast dewatering pile tube in building foundation pit according to claim 1, it is characterised in that the cross section of the permeable hole
To be horn-like, and outer surface to inner surface direction of the diameter along tube wall of cross section is gradually decreased.
3. precast dewatering pile tube in building foundation pit according to claim 2, it is characterised in that the external diameter of the permeable hole is
20mm, internal diameter is 8mm.
4. according to precast dewatering pile tube in any described building foundation pit of claims 1 to 3, it is characterised in that the permeable hole
It is arranged in from the upper table of the precast dewatering pile tube downwards 40cm~60cm region.
5. according to precast dewatering pile tube in any described building foundation pit of claims 1 to 3, it is characterised in that the permeable hole
Using prefabricated mould pore-forming.
6. precast dewatering pile tube in building foundation pit according to claim 1, it is characterised in that the inner surface of the taper pile top
Provided with fixture, the cartridge filter is fixed in the precast dewatering pile tube by connecting the fixture.
7. precast dewatering pile tube in building foundation pit according to claim 1, it is characterised in that the lower end of the cartridge filter is chi
The very little taper matched with the taper pile top, the lower end of the cartridge filter is embedded in the taper pile top, so that will filtering
Cylinder is fixed in the precast dewatering pile tube.
8. the application method of precast dewatering pile tube in a kind of building foundation pit according to claim 1, it is characterised in that successively
Comprise the following steps：(1) previously fabricated precast dewatering pile tube, institute is determined according to the size of site operation environment and required immersible pump
State the diameter of precast dewatering pile tube；(2) report and Foundation Pit Support Design file are surveyed in base area, determine the precast dewatering pile tube
Total quantity, arrangement spacing；(3) precast dewatering pile tube is installed, and water filling cleaning is carried out by root to the precast dewatering pile tube；(4)
Immersible pump and outlet pipe are put into the precast dewatering pile tube, is first tested, determines that the precast dewatering pile tube can normally be taken out
It is formal after water, draining to proceed by draining operating；(5) after construction is finished, stop immersible pump and draw water, carry out borehole cleaning processing, perfusion
Cement mortar, part of cement mortar by permeable hole to exosmosis and with soil solidifying outside the precast dewatering pile tube.
9. precast dewatering pile tube application method in building foundation pit according to claim 8, it is characterised in that in step (3)
The precast dewatering pile tube installation site is away from structural column and shear wall.
10. precast dewatering pile tube application method in building foundation pit according to claim 8, it is characterised in that in step (5)
The upper surface of the precast dewatering pile tube has poured bottom board concrete, and the bottom board concrete closes the precast dewatering pile tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510654291.0A CN105178289B (en) | 2015-10-10 | 2015-10-10 | Precast dewatering pile tube and its application method in building foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510654291.0A CN105178289B (en) | 2015-10-10 | 2015-10-10 | Precast dewatering pile tube and its application method in building foundation pit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105178289A CN105178289A (en) | 2015-12-23 |
| CN105178289B true CN105178289B (en) | 2017-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510654291.0A Expired - Fee Related CN105178289B (en) | 2015-10-10 | 2015-10-10 | Precast dewatering pile tube and its application method in building foundation pit |
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| Country | Link |
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| CN (1) | CN105178289B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464120A (en) * | 2015-12-29 | 2016-04-06 | 天津市海岸带工程有限公司 | Foundation structure capable of pumping water by using centrifugal pump |
| CN106013095A (en) * | 2016-06-14 | 2016-10-12 | 宫能和 | Pile-forming method of netty tubular structure pile |
| CN110552361A (en) * | 2018-06-04 | 2019-12-10 | 中冶天工集团有限公司 | Pipe pile structure used as dewatering well |
| CN109137888A (en) * | 2018-08-08 | 2019-01-04 | 中国二十冶集团有限公司 | The dewatering construction method of prefabricated concrete pipe pile supporting construction |
| CN109610489B (en) * | 2019-01-15 | 2020-07-31 | 中铁隧道局集团建设有限公司 | Precipitation well for preventing sludge from blocking water suction pump |
| CN109723071B (en) * | 2019-02-23 | 2021-02-09 | 杭州昂创科技有限公司 | Construction method of double-layer steel drum drainage system built in basement floor post-cast strip |
| CN110172981B (en) * | 2019-06-05 | 2020-05-05 | 招商局重庆交通科研设计院有限公司 | Self-precipitation prestressed anti-slip pipe pile and construction method thereof |
| CN110984179B (en) * | 2019-12-25 | 2021-07-09 | 兰州理工大学 | Recyclable assembled drainage-collecting extruded-expanded-tire pile supporting structure and construction method |
| CN113338299B (en) * | 2021-06-21 | 2023-02-28 | 中铁十二局集团有限公司 | Pile well composite foundation pit supporting construction method |
| CN114134904B (en) * | 2021-12-14 | 2022-11-01 | 中国五冶集团有限公司 | Deep foundation pit supporting and dewatering integrated precast tubular pile construction method |
| CN114182719B (en) * | 2021-12-25 | 2023-03-10 | 中机工程有限公司 | Anti-floating pile for underground chamber foundation |
| CN115182369A (en) * | 2022-07-29 | 2022-10-14 | 中交(南京)建设有限公司 | Dewatering well structure and pile foundation construction method reconstructed by utilizing dewatering well |
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| Publication number | Publication date |
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| CN105178289A (en) | 2015-12-23 |
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