CN105178289A - Prefabricated downcast pipe pile in building foundation pit and use method thereof - Google Patents
Prefabricated downcast pipe pile in building foundation pit and use method thereof Download PDFInfo
- Publication number
- CN105178289A CN105178289A CN201510654291.0A CN201510654291A CN105178289A CN 105178289 A CN105178289 A CN 105178289A CN 201510654291 A CN201510654291 A CN 201510654291A CN 105178289 A CN105178289 A CN 105178289A
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- pile tube
- precast dewatering
- dewatering pile
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- foundation pit
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a prefabricated downcast pipe pile in a building foundation pit and a use method thereof. The prefabricated downcast pipe pile is a hollow cylinder and comprises a pipe wall and a conical tip. A plurality of water permeable holes are formed in the upper portion of the pipe wall at intervals. A filter barrel is arranged inside the prefabricated downcast pipe pile, the upper end of the filter barrel is open, and the lower end of the filter barrel is closed. The use method of prefabricated downcast pipe piles sequentially includes the first step of prefabricating the prefabricated downcast pipe piles, the second step of determining the total quantity and arrangement intervals of the prefabricated downcast pipe piles, the third step of installing the prefabricated downcast pipe piles and injecting water to clean the piles one by one, the fourth step of placing immersible pumps and water outlet pipes into the prefabricated downcast pipe piles, and the fifth step of stopping the immersible pumps from pumping water, cleaning holes, injecting cement mortar, and making part of the cement mortar permeate outwards via the water permeable holes and solidify to the outside soil of the prefabricate downcast pipe piles. By means of the prefabricated downcast pipe pile, the construction period of pipe wells is shortened. Meanwhile, the anti-floating performance of the prefabricated downcast pipe pile is improved by changing the pile to be an uplift pile.
Description
Technical field
The present invention relates to the realm of building construction, what be specifically related to is precast dewatering pile tube and using method thereof in a kind of building foundation pit.
Background technology
In correlation technique, well-point dewatering method is a kind of method of artificial dewatering, because well-point dewatering method is applicable to that groundwater table is higher or amount of precipitation is more, digs that base is comparatively dark, in the construction environment of hole wall instability, is widely used at present in ground works.Before excavation of foundation pit, make precipitation pipe well in the boring of foundation ditch surrounding and bury well-point pipe underground, dewatering construction workload is large, and precipitation complete after well-point pipe throw aside, cause the waste of resource.
Summary of the invention
For the problems referred to above, the object of this invention is to provide precast dewatering pile tube and using method thereof in building foundation pit, solve dewatering construction workload large, after foundation pit dewatering completes, well-point pipe is thrown aside, causes the technical problem of the wasting of resources.
For solving the problems of the technologies described above, the technical solution used in the present invention is divided into the using method of precast dewatering pile tube and described precast dewatering pile tube in building foundation pit.
Described precast dewatering pile tube is the cylindrical shape of hollow, comprises tube wall and taper pile top, and the top of described tube wall has been spaced multiple permeable hole.Described precast dewatering pile tube inside is provided with the cartridge filter of hollow cylindrical, and the upper end open of described cartridge filter, lower end closed, underground water outside described precast dewatering pile tube enters in precast dewatering pile tube by permeable hole, enter after the filtration of cartridge filter in described cartridge filter, and the silt in underground water is tackled between the inner surface and cartridge filter of described tube wall.
As preferably, the cross section of described permeable hole is horn-like, and the diameter of cross section reduces along the external surface of tube wall gradually to inner surface direction.
As preferably, the external diameter of described permeable hole is 20mm, and internal diameter is 8mm.
As preferably, described permeable hole is arranged in the region of the downward 40cm ~ 60cm of upper surface of described precast dewatering pile tube.
As preferably, described permeable hole adopts prefabricated mould pore-forming.
As preferably, the inner surface of described taper pile top is provided with fixture, and described cartridge filter is fixed in described precast dewatering pile tube by connecting described fixture.
As preferably, the lower end of described cartridge filter is the taper that size and described taper pile top match, and the lower end of described cartridge filter is embedded in described taper pile top, thus is fixed on by cartridge filter in described precast dewatering pile tube.
The using method of precast dewatering pile tube in building foundation pit, comprises the following steps successively: (1) manufactures precast dewatering pile tube in advance, determines the diameter of described precast dewatering pile tube according to the size of site operation environment and required drainage pump; (2) report and Foundation Pit Support Design file are surveyed in base area, determine total quantity, the arrangement pitch of described precast dewatering pile tube; (3) precast dewatering pile tube is installed, and by root, water filling cleaning is carried out to described precast dewatering pile tube; (4) put into submersible pump and outlet pipe in described precast dewatering pile tube, first test, determine described precast dewatering pile tube can normal pumping, formally start to carry out draining running after draining; (5) construction after, stop submersible pump drawing water, carry out clearly hole process, cement injection mortar, part of cement mortar by permeable hole to exosmosis and with soil solidifying outside described precast dewatering pile tube.
As preferably, described in step (3), precast dewatering pile tube installation site is away from structural column and shear wall.
As preferably, described in step (5), the upper surface of precast dewatering pile tube has built bottom board concrete, and described bottom board concrete closes described precast dewatering pile tube.
Beneficial effect of the present invention: the precast dewatering pile tube on engineering pile basis directly inserts in foundation ditch by the present invention, installing well conductors while forming pipe well, saves the construction sequence of carrying out well casing installation in foundation ditch internal drilling again, shortens the tube well construction duration.The mud of construction pipe well is a part for construction rubbish, uses the precast dewatering pile tube belonging to engineering tubular pile directly to insert in foundation ditch and carries out the discharge that precipitation can reduce mud effectively, reduce the impact on environment, realize civilized construction, green construction.In addition, after construction, hole, slip casting are clearly carried out to precast dewatering pile tube, part of cement mortar by permeable hole to exosmosis and with soil solidifying outside described precast dewatering pile tube, precast dewatering pile tube is become uplift pile, for foundation ditch provides enough supports, improve the anti-floating performance of precast dewatering pile tube.
Accompanying drawing explanation
Utilize accompanying drawing to be described further invention, but the embodiment in accompanying drawing does not form any limitation of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Structural representation when Fig. 1 is draining of the present invention.
Fig. 2 is the structural representation of the present invention when shunting in a well.
Reference numeral: 1, precast dewatering pile tube, 2, permeable hole, 3, submersible pump, 4, outlet pipe, 5, underground water, 6, bottom board concrete, 7, slip casing by pressure pipe, 8, cement mortar, 11, pervious layer, 12, impervious layer.
Detailed description of the invention
The invention will be further described with the following Examples.
Precast dewatering pile tube in building foundation pit, as shown in Figure 1, described precast dewatering pile tube 1 is the cylindrical shape of hollow, comprises tube wall and taper pile top.The top of described tube wall has been spaced multiple permeable hole 2.In the present embodiment, the cross section of described permeable hole 2 is horn-like, and the diameter of cross section reduces along the external surface of tube wall gradually to inner surface direction, and the external diameter of described permeable hole 2 is 20mm, internal diameter is 8mm, is convenient to underground water 5 and enters rapidly in precast dewatering pile tube 1.
General soil horizon is divided into pervious layer 11 and impervious layer 12, underground water 5 mainly concentrates in pervious layer 11, after squeezing into described precast dewatering pile tube 1, described permeable hole 2 is all arranged in pervious layer 11, permeable hole 2 can be made to draw water maximizing efficiency, thus farthest reduce base mine water 5 content.In the present embodiment, described permeable hole 2 is arranged in the region of the downward 40cm ~ 60cm of upper surface of described precast dewatering pile tube 1.Now, described permeable hole 2 is all arranged in pervious layer 11, and underground water the having the greatest impact to foundation ditch of 40cm ~ 60cm degree of depth under foundation ditch, the moisture of draining this region can reduce the impact of underground water 5 on foundation ditch substantially when permeable hole 2 is less, and implementation efficiency maximizes.
Described precast dewatering pile tube 1 inside is provided with the cartridge filter of hollow cylindrical, and the upper end open of described cartridge filter, lower end closed, underground water 5 outside described precast dewatering pile tube 1 enters in precast dewatering pile tube 1 by permeable hole 2, enter after the filtration of cartridge filter in described cartridge filter, and the silt in underground water 5 is tackled between the inner surface and cartridge filter of described tube wall.Float when filtering to prevent cartridge filter, affect filter efficiency, in the present embodiment, the inner surface of described taper pile top is provided with fixture, when manufacturing described precast dewatering pile tube 1, described cartridge filter is fixed in described precast dewatering pile tube 1 by connecting described fixture in advance.In another embodiment, the lower end of described cartridge filter is the taper that size and described taper pile top match, when manufacturing described precast dewatering pile tube 1, the lower end of described cartridge filter is embedded in described taper pile top, thus cartridge filter is fixed in described precast dewatering pile tube 1.
The using method of precast dewatering pile tube in building foundation pit, comprises the following steps successively:
(1) manufacture precast dewatering pile tube 1 in advance, determine the diameter of described precast dewatering pile tube 1 according to the size of site operation environment and required submersible pump 3.Before manufacturing precast dewatering pile tube 1, first consider pile tube hole size, guarantee that submersible pump 3 can convenient and swiftly be put into and reclaim.Secondly, the permeable hole 2 of described precast dewatering pile tube 1 should be opened in pervious layer 11 scope, and it is horn-like that permeable hole 2 adopts prefabricated mould to make, and the diameter of cross section reduces along the external surface of tube wall gradually to inner surface direction.The external diameter of described permeable hole 2 is 20mm, and internal diameter is 8mm, and permeable hole 2 encloses layout 4 along precast dewatering pile tube 1 one, and described permeable hole 2 is arranged in the region of the downward 40cm ~ 60cm of upper surface of described precast dewatering pile tube 1.
(2) report and Foundation Pit Support Design file are surveyed in base area, determine total quantity, the arrangement pitch of described precast dewatering pile tube 1.
(3) precast dewatering pile tube 1 is installed, tries one's best away from structural column and shear wall when described precast dewatering pile tube 1 is installed.By root, water filling cleaning is carried out to described precast dewatering pile tube 1, until flow out clear water, avoids occurring " dried-up well ".
(4) put into submersible pump 3 and outlet pipe 4 in described precast dewatering pile tube 1, outlet pipe 4 connects submersible pump 3, is discharged outside foundation ditch by the underground water in described precast dewatering pile tube 1.First test before normal operation, determine described precast dewatering pile tube 1 whether can normal pumping, draining, occur with or without phenomenons such as gas leakage, blockings.Formal work of drawing water is dropped into after test is normal.
(5) shunt in a well by the bottom board concrete arranged at the upper surface of precast dewatering pile tube 1 after construction, close precast dewatering pile tube 1 one by one according to bottom board concrete construction speed.Before bottom board concrete is set, submersible pump 3 is first stopped to draw water.Bottom deposit due to precast dewatering pile tube 1 has a large amount of mud, therefore hole process is clearly carried out after stopping pumping fast, cement injection mortar 8, as shown in Figure 2, part of cement mortar 8 by permeable hole 2 to exosmosis and with the outer soil solidifying of described precast dewatering pile tube 1, by precast dewatering pile tube 1 and soil layer compact siro spinning technology, solve the problem because Precipitation Process causes periphery pervious layer 11 to loosen.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. a precast dewatering pile tube in building foundation pit, is characterized in that, described precast dewatering pile tube is the cylindrical shape of hollow, comprises tube wall and taper pile top, and the top of described tube wall has been spaced multiple permeable hole; Described precast dewatering pile tube inside is provided with the cartridge filter of hollow cylindrical, and the upper end open of described cartridge filter, lower end closed, underground water outside described precast dewatering pile tube enters in precast dewatering pile tube by permeable hole, enter after the filtration of cartridge filter in described cartridge filter, and the silt in underground water is tackled between the inner surface and cartridge filter of described tube wall.
2. precast dewatering pile tube in a kind of building foundation pit according to claim 1, is characterized in that, the cross section of described permeable hole is horn-like, and the diameter of cross section reduces along the external surface of tube wall gradually to inner surface direction.
3. precast dewatering pile tube in a kind of building foundation pit according to claim 2, is characterized in that, the external diameter of described permeable hole is 20mm, and internal diameter is 8mm.
4., according to precast dewatering pile tube in the arbitrary described a kind of building foundation pit of claims 1 to 3, it is characterized in that, described permeable hole is arranged in the region of the downward 40cm ~ 60cm of upper surface of described precast dewatering pile tube.
5., according to precast dewatering pile tube in the arbitrary described a kind of building foundation pit of claims 1 to 3, it is characterized in that, described permeable hole adopts prefabricated mould pore-forming.
6. precast dewatering pile tube in a kind of building foundation pit according to claim 1, it is characterized in that, the inner surface of described taper pile top is provided with fixture, and described cartridge filter is fixed in described precast dewatering pile tube by connecting described fixture.
7. precast dewatering pile tube in a kind of building foundation pit according to claim 1, it is characterized in that, the lower end of described cartridge filter is the taper that size and described taper pile top match, the lower end of described cartridge filter is embedded in described taper pile top, thus is fixed on by cartridge filter in described precast dewatering pile tube.
8. use the method for precast dewatering pile tube in a kind of building foundation pit described in claim 1, it is characterized in that, comprise the following steps successively: (1) manufactures precast dewatering pile tube in advance, determine the diameter of described precast dewatering pile tube according to the size of site operation environment and required submersible pump; (2) report and Foundation Pit Support Design file are surveyed in base area, determine total quantity, the arrangement pitch of described precast dewatering pile tube; (3) precast dewatering pile tube is installed, and by root, water filling cleaning is carried out to described precast dewatering pile tube; (4) put into submersible pump and outlet pipe in described precast dewatering pile tube, first test, determine described precast dewatering pile tube can normal pumping, formally start to carry out draining running after draining; (5) construction after, stop submersible pump drawing water, carry out clearly hole process, cement injection mortar, part of cement mortar by permeable hole to exosmosis and with soil solidifying outside described precast dewatering pile tube.
9. precast dewatering pile tube using method in building foundation pit according to claim 8, is characterized in that, described in step (3), precast dewatering pile tube installation site is away from structural column and shear wall.
10. precast dewatering pile tube using method in building foundation pit according to claim 8, is characterized in that, described in step (5), the upper surface of precast dewatering pile tube has built bottom board concrete, and described bottom board concrete closes described precast dewatering pile tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510654291.0A CN105178289B (en) | 2015-10-10 | 2015-10-10 | Precast dewatering pile tube and its application method in building foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510654291.0A CN105178289B (en) | 2015-10-10 | 2015-10-10 | Precast dewatering pile tube and its application method in building foundation pit |
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| CN105178289A true CN105178289A (en) | 2015-12-23 |
| CN105178289B CN105178289B (en) | 2017-10-31 |
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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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Cited By (13)
| 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 |
| 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 |
| CN109610489A (en) * | 2019-01-15 | 2019-04-12 | 中铁隧道集团四处有限公司 | Prevent the dewatering well of mud blocking suction pump |
| CN109723071A (en) * | 2019-02-23 | 2019-05-07 | 杭州昂创科技有限公司 | The construction method of the double-deck steel drum Yield rainfall relation system built in basement bottom plate rear pouring tape |
| CN110172981A (en) * | 2019-06-05 | 2019-08-27 | 招商局重庆交通科研设计院有限公司 | One kind is from precipitation prestressing force antiskid tubular pole and its construction method |
| CN110513045A (en) * | 2019-09-12 | 2019-11-29 | 长江水利委员会长江科学院 | A kind of NEW TYPE OF COMPOSITE sand control Reduction by Drainage kill-job soil compaction hole-forming device and method |
| 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 |
| CN110984179A (en) * | 2019-12-25 | 2020-04-10 | 兰州理工大学 | Recyclable assembled drainage-collecting extruded-expanded-tire pile supporting structure and construction method |
| CN113338299A (en) * | 2021-06-21 | 2021-09-03 | 中铁十二局集团有限公司 | Pile well composite foundation pit supporting construction method |
| CN114134904A (en) * | 2021-12-14 | 2022-03-04 | 中国五冶集团有限公司 | Deep foundation pit supporting and dewatering integrated precast tubular pile construction method |
| CN114182719A (en) * | 2021-12-25 | 2022-03-15 | 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 | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN109610489A (en) * | 2019-01-15 | 2019-04-12 | 中铁隧道集团四处有限公司 | Prevent the dewatering well of mud blocking suction pump |
| CN109723071A (en) * | 2019-02-23 | 2019-05-07 | 杭州昂创科技有限公司 | The construction method of the double-deck steel drum Yield rainfall relation system built in basement bottom plate rear pouring tape |
| 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 |
| CN110172981A (en) * | 2019-06-05 | 2019-08-27 | 招商局重庆交通科研设计院有限公司 | One kind is from precipitation prestressing force antiskid tubular pole and its construction method |
| CN110513045B (en) * | 2019-09-12 | 2024-06-11 | 长江水利委员会长江科学院 | Novel composite sand control drainage relief well soil compaction pore-forming device and method |
| CN110513045A (en) * | 2019-09-12 | 2019-11-29 | 长江水利委员会长江科学院 | A kind of NEW TYPE OF COMPOSITE sand control Reduction by Drainage kill-job soil compaction hole-forming device and method |
| CN110984179A (en) * | 2019-12-25 | 2020-04-10 | 兰州理工大学 | Recyclable assembled drainage-collecting extruded-expanded-tire pile supporting structure and construction method |
| 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 |
| CN113338299A (en) * | 2021-06-21 | 2021-09-03 | 中铁十二局集团有限公司 | Pile well composite foundation pit supporting construction method |
| CN114134904A (en) * | 2021-12-14 | 2022-03-04 | 中国五冶集团有限公司 | Deep foundation pit supporting and dewatering integrated precast tubular pile 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 |
| CN114182719A (en) * | 2021-12-25 | 2022-03-15 | 中机工程有限公司 | Anti-floating pile for underground chamber foundation |
| 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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