CN205822174U - Miniature steel pipe pile - Google Patents
Miniature steel pipe pile Download PDFInfo
- Publication number
- CN205822174U CN205822174U CN201620740245.2U CN201620740245U CN205822174U CN 205822174 U CN205822174 U CN 205822174U CN 201620740245 U CN201620740245 U CN 201620740245U CN 205822174 U CN205822174 U CN 205822174U
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- Prior art keywords
- pile
- pipe pile
- steel
- cover plate
- slurry outlet
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Abstract
This utility model provides a kind of miniature steel pipe pile and grouting strengthening method, described miniature steel pipe pile includes steel-pipe pile, the bottom of described steel-pipe pile connects pile top shrouding, it is communicated with inside piling bar pipe on described pile top shrouding and the slurry outlet of pile top periphery soil layer, carrying out consolidation process by twice slip casting soil layer following to pile crown, the self drainage utilizing grouting material is good, the feature such as fast hard, the strongest, ungauged regions, microdilatancy, can quickly, be effectively improved foundation capability, and then improve stake end bearing capacity；And utilizing reverse frustoconic rubber stopper effectively to prevent the mixing of cement mortar and grouting material, it is ensured that grouting material is in the intensity of pile crown.
Description
Technical field
This utility model belongs to construction engineering technical field, is specifically related to a kind of miniature steel pipe pile.
Background technology
Miniature steel pipe pile is the one of piling bar, has the strength of materials high, implants soil layer ability strong, and soil compaction during pile driving impact is little,
The advantages such as pile compacting equipment is light, easy to connect, have a wide range of applications in engineering construction and reinforcing.But owing to its diameter is little,
Stake weekly form area is little, little with the frictional force of soil, causes miniature steel pipe single-pile vertical orientation bearing capacity limited, therefore, and miniature steel pipe pile
Pile spacing is less, consumption is high, costly, for reduce cost, with steel-pipe pile, mostly open slurry outlet, such as Chinese invention patent
Grouting type micro steel pipe pile disclosed in CN102493437A and grouting strengthening method, described grouting type micro steel pipe pile includes steel
Pipe, described steel pipe sidewall is provided with some groups of spaced slurry outlet groups vertically, and the outside of each group of slurry outlet group is all cased with
Rubber seal.Grouting strengthening method of the present utility model is: after pile sinking terminates, by carrying out pressure in the steel pipe of hollow
Slip casting, uses grouting equipment and applies pressure, the serosity that can solidify is uniformly injected into pile body periphery by the slurry outlet on pile body
Soil layer, under pressure serosity permeate, spread in by note layer, filling and compacted, the loosest soil particle cementation is become one
Individual entirety, thus reach pile soil horizon is carried out consolidation process, improve pile foundation bearing capacity, but the miniature steel pipe pile of this structure exists
Stake Zhou Kaikong slip casting, improves limited to the bearing capacity of pile foundation.
It addition, the material being currently used for slip casting is more, performance and the range of variety classes slurry material also have larger difference,
In engineering construction and reinforcing, more conventional injecting paste material has pea gravel concreten, cement mortar, chemical grouting material etc., various injecting paste materials
All there are following pluses and minuses:
Concrete: in concrete, particle diameter is relatively big, and pile body need to open bigger hole, weakens relatively big to steel-pipe pile cross section, mixed
Though solidifying soil has certain mobility, but uses in minor-diameter steel-tube, construction more difficulty, and it is difficult to pressure note
Slurry；
Cement mortar: cement mortar has good mobility, penetrating power is strong, easily realizes slip casing by pressure, but hard after slip casting
Changing speed relatively slow, easily form linker between the adjacent each stake in slip casting steel pipe neighboring area, slip casting effect does not often reach pre-
Phase effect；
Chemical pulp: chemical pulp is solution state, the property noted is good, but it is expensive, and foundation soil and water quality are had one
Fixed pollution risk.
Utility model content
The technical problems to be solved in the utility model be to provide one can quickly, be effectively improved foundation capability, enter
And improve a miniature steel pipe pile for end bearing capacity.
For solving above-mentioned technical problem, the technical scheme of offer of the present utility model is:
A kind of miniature steel pipe pile, including steel-pipe pile, the bottom of described steel-pipe pile is provided with pile top shrouding, and described pile top is sealed
Plate includes the pile top of inverted cone and is fixed on the circular pile head shrouding bottom described pile top, is communicated with on described pile crown shrouding
Inside steel-pipe pile and the slurry outlet of stake substratum, the upper end of described steel-pipe pile is provided with pile crown jointing, and slip casing by pressure pipe leads to
Cross pile crown jointing to access inside steel-pipe pile, during slip casing by pressure: rubber stopper by the cement mortar on the grouting material of bottom and top every
Open.
Preferred as one, in this utility model, pile crown shrouding is by the fan section that cross pile top cutting is 4 homalographics, often
Fan section described in one is provided with a vertical slurry outlet and and tilts slurry outlet, and described inclination slurry outlet is positioned at outside vertical slurry outlet
Side.
In this utility model, the bottom in each described fan section is provided with cover plate, and described cover plate includes the first lid being hinged
Plate and the second cover plate, described first cover plate and the second cover plate are covered on vertical slurry outlet and inclination accordingly by key drop rotating shaft
The exit of slurry outlet, cover plate diameter is bigger than described slurry outlet diameter, forms one-way flow valve.During slip casting, cover plate launches one
Fixed angle (less than 60 °), slip casting terminate after under overfall effect, cover plate can fast automatic Guan Bi, it is ensured that grouting material does not returns
Stream, soil does not enter in steel pipe.
Preferred as one, the first cover plate in this utility model and the second cover plate are equipped with only gusset of putting more energy into.No
It is only capable of strengthening cover plate rigidity, and expanded angle is limited, grouting material can be effectively ensured and do not reflux, can improve the efficiency of slip casting..
Preferred as one, slip casing by pressure pipe described in this utility model is provided with slip casting controlled valve, can realize quantitatively
Pressure cement injection.
Preferred as one, rubber stopper described in this utility model is reverse frustoconic, can effectively prevent cement mortar and filling
The mixing of slurry, it is ensured that grouting material is in the intensity of pile crown；
Preferred as one, the diameter of pile crown shrouding described in this utility model is compared with the big 5 ~ 10mm of outer diameter of steel pipes, Ke Yiyou
Effect concentrates on below pile crown when mainly being discharged by grouting material.
The grouting strengthening method of a kind of miniature steel pipe pile, its grouting strengthening method comprises the steps:
(1), before construction, pile top shrouding processes 4 vertical slurry outlets and 4 inclination slurry outlets, at pile top shrouding
Bottom is arranged in correspondence with 4 cover plates；
(2) according to Specific construction place, the joint number of required steel-pipe pile is calculated；
(3) bottom of first segment steel-pipe pile is installed the pile top shrouding of manufactured inverted cone, then passes through counter-force
Shelf structure squeezes into soil layer by pressing under first segment steel-pipe pile；
(4), after first segment steel-pipe pile is depressed into position, welds second section steel pipe in the upper end of first segment steel pipe, weld successively
Connect, until the pile top shrouding of first segment steel-pipe pile bottom arrives the degree of depth under the soil layer needed for construction；
(5) carry out no pressure slip casting in the passage formed inside all steel-pipe pile groups welded, fill strength grade
The grouting material of >=40MPa, the gas in evacuated tube and water；
(6) at the upper end open of steel-pipe pile group filling grouting material, reverse frustoconic rubber stopper is filled in, logical in 5-10 minute
Cross pile crown jointing and slip casing by pressure pipe accessed steel-pipe pile group inner channel, inwardly add cement injection by slip casing by pressure pipe,
The grouting pressure utilizing cement mortar forces reverse frustoconic rubber stopper descending, until vertically being gone out on pile top shrouding by all grouting materials
Slurry hole and inclination slurry outlet are expressed in the periphery soil layer of pile top shrouding；
(7) after slip casing by pressure terminates, the cement mortar that steel-pipe pile group inner channel is injected by pressure is filled closely knit, previous without pressure
The grouting material that power is injected is filled in pile top periphery soil layer formation and expands pile crown to.
Having the beneficial effect that of technique scheme of the present utility model:
This utility model is to open slurry outlet on the pile top shrouding of steel-pipe pile, first carries out no pressure in steel-pipe pile and injects filling
Slurry, when grouting material is full of steel pipe inner volume, fills in reverse frustoconic shape rubber stopper at steel pipe oral area, then in 5 ~ 10 minutes
Inject cement mortar to steel overpressure, by actively applying pressure, grouting material is expressed to steel pipe by the slurry outlet opened in advance
In the periphery soil body of stake pile top, the self drainage utilizing grouting material (strength grade >=40MPa) is good, fast hard, the strongest, ungauged regions, micro-
The features such as expansion, can quickly, be effectively improved foundation capability, and then improve stake end bearing capacity；And utilize reverse frustoconic rubber
Plug effectively prevents the mixing of cement mortar and grouting material, it is ensured that grouting material is in the intensity of pile crown.
Accompanying drawing explanation
Fig. 1 is schematic diagram before slip casing by pressure；
Fig. 2 is schematic diagram in slip casing by pressure；
Fig. 3 is schematic diagram after slip casing by pressure；
Fig. 4 is pile crown cross pile top schematic diagram；
Fig. 5 is the key drop rotated；
Fig. 6 is to cover tightly the key drop under state；
Fig. 7 is the key drop under deployed condition
1 pile top in figure；2, steel-pipe pile；3 grouting materials；4 rubber stoppers；5 cement mortars；6 pile crown jointings；7 slip casting switch valves
Door；8 slip casing by pressure pipes；The pile crown expanded after 9 slip castings；10 cross pile tops；11 pile crown shroudings；12 straight holes；13 inclined holes；14 key drops
Rotating shaft；15 cover plates；16 put more energy into only gusset.
Detailed description of the invention
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And specific embodiment is described in detail.
As it can be seen, a kind of miniature steel pipe pile, including steel-pipe pile 2, it is welded with pile top shrouding in the bottom of steel-pipe pile 2,
Pile top shrouding is exactly the pile top 1 of inverted cone and is welded in the circular pile head shrouding 11 bottom pile top 1, and pile crown shrouding 11 has 8
Individual slurry outlet, these 8 slurry outlets can connect inside steel-pipe pile 2 and stake substratum, and the upper end of steel-pipe pile 2 is provided with pile crown and connects
Joint 6, slip casing by pressure pipe 8 accesses inside steel-pipe pile 2, during slip casing by pressure by pile crown jointing 6: reverse frustoconic rubber stopper 4
The most descending and the cement mortar 5 of the grouting material 3 of bottom with top is separated, when truncated cone-shaped rubber stopper 4 goes downwards to steel-pipe pile 2
During lower end, now it is filled with cement mortar 5 inside steel-pipe pile 2, and grouting material 3 has been stuffed entirely with in pile top periphery soil layer, shape
The pile crown 9 expanded after becoming slip casting, grouting material, compared with the big 5 ~ 10mm of outer diameter of steel pipes, can be concentrated mainly on by the diameter of pile crown shrouding 11
Below pile crown.
Pile top in this utility model is cross pile top 10, and pile crown shrouding 11 is welded and fixed with cross pile top 10, and pile crown seals
Plate 11, by the fan section that cross pile top 10 cutting is 4 homalographics, each described fan section has vertical slurry outlet 12 He
One tilts slurry outlet 13, tilts slurry outlet 13 and is positioned at the outside of vertical slurry outlet, such pile crown shrouding 11 has 8 pulps
Hole, at each group of vertical slurry outlet 12 with tilt and be mounted on cover plate 15 on slurry outlet 13, cover plate 15 include being hinged the
One cover plate and the second cover plate, the first cover plate and the second cover plate are covered on vertical slurry outlet 12 He accordingly by key drop rotating shaft 14
Tilting the exit of slurry outlet 13, cover plate diameter is bigger than slurry outlet diameter, so can form one-way flow valve, at steel pipe
Stake 2 is when being initially pushed down into soil layer, and cover plate is Guan Bi, is possible to prevent earth to enter into inside steel-pipe pile 2 the, now there may be
A small amount of moisture enters, and can be emptied by moisture when grouting material 3 enters.Being equipped with only gusset 16 of putting more energy on cover plate 15, this practicality is new
The slip casing by pressure pipe 8 of type is provided with slip casting controlled valve 7, can realize quantitative slip casing by pressure.
As it can be seen, the grouting strengthening method of a kind of miniature steel pipe pile, its grouting strengthening method comprises the steps:
(1), before construction, pile top shrouding processes 4 vertical slurry outlets and 4 inclination slurry outlets, at pile top shrouding
Bottom is arranged in correspondence with 4 cover plates；
(2) according to Specific construction place, the joint number of required steel-pipe pile is calculated；
(3) bottom of first segment steel-pipe pile is installed the pile top shrouding of manufactured inverted cone, then passes through counter-force
Shelf structure squeezes into soil layer by pressing under first segment steel-pipe pile；
(4), after first segment steel-pipe pile is depressed into position, welds second section steel pipe in the upper end of first segment steel pipe, weld successively
Connect, until the pile top shrouding of first segment steel-pipe pile bottom arrives the degree of depth under the soil layer needed for construction；
(5) carry out no pressure slip casting in the passage formed inside all steel-pipe pile groups welded, fill strength grade
The grouting material of >=40MPa, the gas in evacuated tube and water；
(6) at the upper end open of steel-pipe pile group filling grouting material, reverse frustoconic rubber stopper is filled in, logical in 5-10 minute
Cross pile crown jointing and slip casing by pressure pipe accessed steel-pipe pile group inner channel, inwardly add cement injection by slip casing by pressure pipe,
The grouting pressure utilizing cement mortar forces reverse frustoconic rubber stopper descending, until vertically being gone out on pile top shrouding by all grouting materials
Slurry hole and inclination slurry outlet are expressed in the periphery soil layer of pile top shrouding；
(7) after slip casing by pressure terminates, the cement mortar that steel-pipe pile group inner channel is injected by pressure is filled closely knit, previous without pressure
The grouting material that power is injected is filled in pile top periphery soil layer formation and expands pile crown to.
Compared with existing miniature steel pipe pile and grouting strengthening method, the miniature steel pipe pile that this utility model embodiment provides
And grouting strengthening method, have the advantage that
(1) construction method of this grouting and reinforcing, device therefor, connected mode are simple, it is easy to operation；(2) grouting used by
To have self drainage good for material, firmly, the strongest, high-strength, ungauged regions, the feature such as microdilatancy, the most pollution-free to water quality and surrounding, from close
Property is good, antirust etc.；(3) make full use of the feature of grouting material and cement mortar, grouting material high-early-strength but denseness is high, cement mortar flow
Property good but early strength is low, be allowed to learn from other's strong points to offset one's weaknesses；(4) miniature steel pipe pile is only in perforate at the bottom of stake, can be to the supporting course at pile top place
Neighbouring soil layer carries out basement process, can be effectively improved an end bearing capacity；(5) pile top shrouding is divided into four homalographic regions, has
Benefit the axial compression of steel-pipe pile；(6) slurry outlet and the combination of vertical slurry outlet are tilted, it is simple to grouting material is wider at pile crown
The interior pile crown forming expansion, is effectively improved bearing capacity of single pile；(7) 8 slurry outlets are arranged symmetrically with, it is simple to formed and expand stake uniformly
Head, stress is more reasonable；(8) pile crown forms unidirectional grout, arranges rotating cover plate, it is ensured that soil does not enter steel on pile top shrouding
In pipe, only gusset that cover plate is put more energy into, cover plate rigidity can not only be strengthened, and expanded angle is limited, grouting material can be effectively ensured not
Backflow, improves the efficiency of slip casting；(9) the upper surface diameter of pile top shrouding 5-10mm bigger than pile body external diameter, can effectively prevent grouting
Expect to reflux along tube wall, also can expansion pile head area；(10) filled closely knit by part grouting material and cement mortar in steel pipe, steel can be improved
The strength and stiffness of pipe itself；(11) stake top filling adaptor is dismantled and assembled, reusable, economical environment-protective.
The above is preferred implementation of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from principle described in the utility model, it is also possible to make some improvements and modifications, these improve
Also protection domain of the present utility model is should be regarded as with retouching.
Claims (7)
1. a miniature steel pipe pile, including steel-pipe pile (2), it is characterised in that the bottom of described steel-pipe pile (2) is provided with pile top
Shrouding, described pile top shrouding includes the pile top (1) of inverted cone and is fixed on the circular pile head shrouding of described pile top (1) bottom
(11), described pile crown shrouding (11) is communicated with steel-pipe pile (2) inner side and the slurry outlet of stake substratum, described steel-pipe pile
(2) upper end is provided with pile crown jointing (6), and slip casing by pressure pipe (8) accesses steel-pipe pile (2) by pile crown jointing (6)
Inner side, during slip casing by pressure: the cement mortar (5) of the grouting material (3) of bottom with top is separated by rubber stopper (4).
Miniature steel pipe pile the most according to claim 1, it is characterised in that: described pile crown shrouding (11) is by cross pile top (10)
Cutting is the fan section of 4 homalographics, and each described fan section is provided with a vertical slurry outlet (12) and and tilts slurry outlet
(13), described inclination slurry outlet (13) is positioned at the outside of vertical slurry outlet.
Miniature steel pipe pile the most according to claim 2, it is characterised in that: the bottom in each described fan section is provided with cover plate
(15), described cover plate includes the first cover plate and the second cover plate being hinged, and described first cover plate and the second cover plate pass through cap bore
Plate rotating shaft (14) is covered on vertical slurry outlet (12) accordingly and tilts the exit of slurry outlet (13), and described cover plate diameter compares institute
State slurry outlet diameter big, form one-way flow valve.
Miniature steel pipe pile the most according to claim 3, it is characterised in that be all provided with on described first cover plate and the second cover plate
Put more energy into only gusset (16).
Miniature steel pipe pile the most according to claim 1, it is characterised in that: described slip casing by pressure pipe (8) is provided with slip casting and opens
Closing valve (7).
Miniature steel pipe pile the most according to claim 1, it is characterised in that: described rubber stopper (4) is reverse frustoconic.
Miniature steel pipe pile the most according to any one of claim 1 to 6, it is characterised in that described pile crown shrouding (11)
Diameter is compared with the big 5 ~ 10mm of outer diameter of steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620740245.2U CN205822174U (en) | 2016-07-14 | 2016-07-14 | Miniature steel pipe pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620740245.2U CN205822174U (en) | 2016-07-14 | 2016-07-14 | Miniature steel pipe pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205822174U true CN205822174U (en) | 2016-12-21 |
Family
ID=57563721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620740245.2U Withdrawn - After Issue CN205822174U (en) | 2016-07-14 | 2016-07-14 | Miniature steel pipe pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205822174U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106013098A (en) * | 2016-07-14 | 2016-10-12 | 淮海工学院 | Miniature steel pipe pile and grouting reinforcement method |
| CN107975375A (en) * | 2017-10-24 | 2018-05-01 | 济南城建集团有限公司 | A kind of miniature steel pipe pile reinforced soft foundation construction method of city tunnel |
| CN109457695A (en) * | 2018-11-14 | 2019-03-12 | 佛山市高明顺高木业有限公司 | A kind of cement steel-pipe pile |
| CN111287207A (en) * | 2019-12-31 | 2020-06-16 | 浙江工业大学 | Calcareous sandy soil foundation solidification structure |
-
2016
- 2016-07-14 CN CN201620740245.2U patent/CN205822174U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106013098A (en) * | 2016-07-14 | 2016-10-12 | 淮海工学院 | Miniature steel pipe pile and grouting reinforcement method |
| CN106013098B (en) * | 2016-07-14 | 2018-06-05 | 淮海工学院 | Miniature steel pipe pile and grouting strengthening method |
| CN107975375A (en) * | 2017-10-24 | 2018-05-01 | 济南城建集团有限公司 | A kind of miniature steel pipe pile reinforced soft foundation construction method of city tunnel |
| CN107975375B (en) * | 2017-10-24 | 2019-01-11 | 济南城建集团有限公司 | A kind of miniature steel pipe pile reinforced soft foundation construction method of city tunnel |
| CN109457695A (en) * | 2018-11-14 | 2019-03-12 | 佛山市高明顺高木业有限公司 | A kind of cement steel-pipe pile |
| WO2020098041A1 (en) * | 2018-11-14 | 2020-05-22 | 佛山市高明顺高木业有限公司 | Cement steel pipe pile |
| CN111287207A (en) * | 2019-12-31 | 2020-06-16 | 浙江工业大学 | Calcareous sandy soil foundation solidification structure |
| CN111287207B (en) * | 2019-12-31 | 2021-11-05 | 浙江工业大学 | Calcareous sandy soil foundation solidification structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161221 Effective date of abandoning: 20180605 |
|
| AV01 | Patent right actively abandoned |