CN109881662A - Major diameter high-performance UHPC- steel pipe composite pile base and its construction method - Google Patents
Major diameter high-performance UHPC- steel pipe composite pile base and its construction method Download PDFInfo
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- CN109881662A CN109881662A CN201910127457.1A CN201910127457A CN109881662A CN 109881662 A CN109881662 A CN 109881662A CN 201910127457 A CN201910127457 A CN 201910127457A CN 109881662 A CN109881662 A CN 109881662A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
- 239000010959 steel Substances 0.000 title claims abstract description 76
- 239000002131 composite material Substances 0.000 title claims abstract description 57
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 230000003628 erosive effect Effects 0.000 claims abstract description 6
- 238000007667 floating Methods 0.000 claims description 109
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 65
- 239000004567 concrete Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 4
- 239000003818 cinder Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000009417 prefabrication Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims 1
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- 239000010410 layer Substances 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000009411 base construction Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
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Abstract
The invention discloses major diameter high-performance UHPC- steel pipe composite pile bases, comprising: UHPC-RC composite pile, steel pipe composite pile and connector, the connector connect UHPC-RC composite pile with steel pipe composite pile, and the connector is located at minimum erosion line or less；The invention also discloses the construction methods of major diameter high-performance UHPC- steel pipe composite pile base.Composite pile foundation of the invention can not only accelerate speed of application compared to traditional pile foundation, and have preferable economy, bearing capacity and good durability.
Description
Technical field
The present invention relates to the pile foundation structure forms in field of civil engineering, in particular to over strait big under marine corrosion environment
Large-diameter pile foundation building technology in bridge and wind energy project.It is more particularly related to major diameter high-performance UHPC- steel
Pipe composite pile foundation and its construction method.
Background technique
Currently, national, the construction project of the engineerings such as bridge spanning the sea and wind-powered electricity generation increasing to the exploitation dynamics of marine resources
Growth it is considerable, since the wind was high and the waves were pressing and the strong marine environment of corrosivity, the construction of foundation structure is Engineering Project Construction
Weight difficult point.
For the construction on marine environment flowering structure object basis, cast-in-situ bored pile and large diameter steel pipe are mainly used at present
Stake, conventional borehole filling pile construction low efficiency, although large diameter steel pipe pile improves construction efficiency, but cost is high, and need to be into
The long-term corrosion-resistant protection of row, economy are bad.
Summary of the invention
It is an object of the present invention to provide major diameter high-performance UHPC- steel pipe composite pile base and its construction methods, compare
In traditional pile foundation, speed of application can not only be accelerated, and have preferable economy, bearing capacity and good durability.
In order to realize these purposes and other advantages according to the present invention, it is multiple to provide major diameter high-performance UHPC- steel pipe
Close pile foundation, comprising: UHPC-RC composite pile, steel pipe composite pile and connector, the connector are compound by UHPC-RC composite pile and steel pipe
Stake connection, the connector are located at minimum erosion line or less.
Preferably, the UHPC-RC composite pile includes outside UHPC casing and internal cast-in-place concrete；The steel pipe is multiple
Closing stake includes outside steel-pipe pile and internal cast-in-place concrete.
Preferably, the diameter of composite pile foundation is greater than 2 meters.
Preferably, the wall thickness of the UHPC casing is 5-12 centimeters, and the wall thickness of the steel-pipe pile is 1.5-3 centimeters.
Preferably, the UHPC casing inner wall contains circumferential tongue and groove, to form shearing resistance key teeth.
Preferably, the connector is doughnut-shaped steel plate, pre- to be embedded in UHPC casing, the steel plate bottom and steel-pipe pile
Upper end is welded as a whole.
Preferably, the part that the steel plate is embedded in advance in UHPC casing includes the ring of steel plate and outside in the annular of inside
The outer steel plate of shape, is staggeredly equipped with more screw-thread steels between the interior steel plate outer wall and outer steel plate inner wall on circumferentially and longitudinally
Muscle, the interior steel plate inner wall and outer steel plate outer wall towards it is external circumferentially and longitudinally on be also equipped with more spirals.
Preferably, the UHPC casing, which is located at sea, is additionally provided with anti-collision structure comprising:
Pre-buried casing is overlapped with UHPC casing central axes and is close to the setting of UHPC casing lateral wall, described pre-buried
Casing is poured with UHPC casing integrated molding；
Built-in fitting, be it is multiple and be embedded in the pre-buried casing in advance, along the same circumferential direction of the pre-buried casing it is uniform between
Every the multiple built-in fittings of setting, and multiple built-in fittings are also provided with along the same longitudinal direction of the pre-buried casing, each built-in fitting is all connected with
There is the connecting rope extended outside the pre-buried casing；
First floating column is multiple and is to be close to pre-buried shield by the connecting rope binding on same longitudinal multiple built-in fittings
Cylinder, binds connecting rope also the second floating column of fixed binding of the first floating column, multiple second floating column uniform intervals be located at it is same circumferential and
It is respectively positioned on the outside of the first floating column；
Third floats column, is close to the pre-buried casing setting, the third float column every two adjacent the first floating columns it
Between be respectively provided with one, the third, which is floated, to be integrated between column and the first floating column by wound and bound rope binding and third is floated column and first and floated
Column is mutually close to, and the floating column upper surface of the third, which is recessed downwards, is formed with cavity, is inside combined with the 5th floating column, the described 5th is floating
Column upper end protrudes from the third and floats outside column upper surface；
4th floating column is respectively provided with one between every two adjacent the second floating columns, and the 4th floating column and second float
It is integrated between column by wound and bound rope binding and the 4th floating column is mutually close to the second floating column, be provided on the 4th floating column more
The through-hole of a perforation；
Connect floating column, connection third floats column and the 4th floating column and longitudinally disposed multiple, it is described connect floating column and have passes through
Logical water stream channel, one end perforation third of the water stream channel floats the cavity of column, the other end penetrates through the through-hole on the 4th floating column.
Preferably, it is arc that the described first floating column, third, which float column, the 4th floating column and the 5th floating column, and the described 5th is floating
Column lower end is connect by rope with cavity bottom so that the 5th floating column lower end is non-bulging in outside the floating column of the third.
The present invention also provides a kind of construction methods of major diameter high-performance UHPC- steel pipe composite pile base, include the following steps:
S1: prefabrication UHPC casing and steel-pipe pile, and formula structure is connected as one by connector；
S2: by after connection UHPC casing and steel-pipe pile transport to stake position, lifted, positioned and hammered sinking；
S3: pile sinking to specified absolute altitude, drilling, scarfing cinder transfer steel reinforcement cage and pour internal core concrete；
S4: compound pile driving construction is completed.
The present invention is include at least the following beneficial effects:
1, over strait big under the composite pile foundation of the invention marine environment strong especially suitable for loading condition complexity and corrosivity
The basic engineering construction of bridge and wind energy project can not only accelerate speed of application, and have preferable economy, bearing capacity and good
Good durability.
2, composite pile foundation diameter wide coverage of the invention, can reach 3 meters or even 4 meters.
3, composite pile foundation of the invention can give full play to the advantages of UHPC casing and steel-pipe pile, promote the construction effect of bored concrete pile
The economy of rate and steel-pipe pile.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of composite pile foundation of the present invention；
Structural schematic diagram when Fig. 2 is composite pile foundation of the present invention non-casting concrete；
Fig. 3 is the partial sectional view of inventive joint；
Fig. 4 is the top view of anti-collision structure of the present invention；
Fig. 5 is that third of the present invention floats column and the 4th floating column attachment structure schematic diagram.
Description of symbols:
1, UHPC-RC composite pile, 2, steel pipe composite pile, 3, connector, 4, cast-in-place concrete, 5, UHPC casing, 6, steel-pipe pile,
7, cushion cap, 8, spiral, 9, pre-buried casing, 10, connecting rope, the 11, first floating column, the 12, second floating column, 13, the floating column of third,
14, the 4th floating column, the 15, the 5th floating column, 16, the floating column of connection, 17, through-hole, 18, cavity.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be noted that experimental method described in following embodiments is unless otherwise specified conventional method, institute
Reagent and material are stated, unless otherwise specified, is commercially obtained；In the description of the present invention, term " transverse direction ", " vertical
To ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", the instructions such as "outside" side
Position or positional relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description,
It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, because
This is not considered as limiting the invention.
As shown in Fig. 1 to 2, the present invention provides a kind of major diameter high-performance UHPC- steel pipe composite pile base, comprising: UHPC-RC
Composite pile 1, steel pipe composite pile 2 and connector 3, the connector 3 connects UHPC-RC composite pile 1 and steel pipe composite pile 2, described to connect
First 3 are located at minimum erosion line or less.The UHPC-RC composite pile 1 includes outside UHPC casing 5 and internal cast-in-place concrete 4；Institute
Stating steel pipe composite pile 2 includes outside steel-pipe pile 6 and internal cast-in-place concrete 4.
In the above-mentioned technical solutions, UHPC casing 5 and steel-pipe pile 6 can be used as drilling and internal core cast-in-place concrete 4 is poured
Retaining wall when building, 5 energy lift structure durability of UHPC casing, reduces by 6 anti-corrosion expense of steel-pipe pile, steel-pipe pile 6 can improve can inserting piling
Property, it accelerates construction progress, ensure the construction quality.After the completion of internal core cast-in-place concrete 4 pours, UHPC casing 5 and steel-pipe pile 6
It may participate in structure stress, improve composite pile foundation bending resistance and Compressive Bearing Capacity；5 density of UHPC casing is good, can be used as inner core
The protective layer of heart cast-in-place concrete 4 reduces the erosive velocity of chloride ion in fluctuation of water table area and splash zone core concrete, is promoted
The durability of piling strtucture.For the stress performance and durability for ensuring lower segment steel pipe composite pile 2,3 part of connector should be arranged
In minimum erosion line hereinafter, reducing the corrosion rate of steel-pipe pile 6.Compound pile base construction method of the invention is as follows:
1) according to design requirement, the reasonable diameter and length of UHPC casing and steel-pipe pile are determined, and carry out batch production it is prefabricated,
Connection and quality testing；
2) by after connection UHPC casing and steel-pipe pile transport to stake position, lifted, positioned and hammered sinking；
3) pile sinking to specified absolute altitude, drilling, scarfing cinder transfers steel reinforcement cage and pours internal core concrete；
4) it completes compound pile driving construction and the reserved connecting structure with cushion cap 7, that is, the steel reinforcement cage upper end of lowered inside is convex
Inside cushion cap 7, it is connected as one with cushion cap 7.
In another technical solution, the diameter of composite pile foundation is greater than 2 meters.Composite pile foundation diameter of the invention can at least be done
To being greater than 2 meters, according to practice of construction situation, the pile foundation of minor diameter can also equally construct.
In another technical solution, the wall thickness of the UHPC casing 5 is 5-12 centimeters, and the wall thickness of the steel-pipe pile 6 is
1.5-3 centimetre.
In the above-mentioned technical solutions, the wall thickness of UHPC casing 5 is oppositely arranged thicker, and generally 5-12 centimeters, a side
Face guarantee hammer sink when can bear stronger hammer force, in fact, the wall thickness of UHPC casing 5 be arranged it is thicker after, compare
Steel-pipe pile 6 is easier to bear hammer force；On the other hand guarantee that UHPC casing 5 is not in breakage in production, transport and hammering
The case where cracking, and steel-pipe pile 6 is set as conventional wall thickness, 1.5-3 centimeters.
In another technical solution, 5 inner wall of UHPC casing contains circumferential tongue and groove, to form shearing resistance key teeth, enhancing
The stress performance of UHPC-RC composite pile.
In the above-mentioned technical solutions, the interface cohesion of UHPC casing 5 and common cast-in-place concrete 4 than conventional steel stake 6 with
The combination of cast-in-place concrete 4 is excellent, and the degree of common stress is also more excellent；Reinforcing bar of the steel-pipe pile 6 in its inner wall welding annular
Deng forming similar connector, then casting concrete, steel-pipe pile 6 combines to form steel pipe composite pile with 4 the two of cast-in-place concrete
2, but still it is easy to appear the sliding of cast-in-place concrete 4；And concave-convex shearing resistance key teeth is formed in 5 inner wall of UHPC casing, UHPC
Casing 5 will not substantially generate sliding after being combined with cast-in-place concrete 4, so that the binding force of the two has been significantly greatly increased, so that this
The composite pile foundation load-carrying properties of invention enhance.
In another technical solution, the connector 3 is doughnut-shaped steel plate, pre- to be embedded in UHPC casing 5, the steel plate bottom
Portion and the upper end of steel-pipe pile 6 are welded as a whole.
In the above-mentioned technical solutions, UHPC casing 5 carry out prefabrication when, by the top of connector 3 pour together in
Then UHPC casing 5 protrudes from outside UHPC casing 5 so that the top of connector 3 and UHPC casing 5 are integral type fixed structure
The lower part of connector 3 and steel-pipe pile 6 weld, to be connected UHPC casing 5 and steel-pipe pile 6 by connector 3, UHPC casing 5
After connecting with steel-pipe pile 6, lateral wall is overlapped, internal casting concrete.
In another technical solution, the part that the steel plate is embedded in advance in UHPC casing 5 includes steel in the annular of inside
The outer steel plate of the annular of plate and outside, is staggeredly equipped on circumferentially and longitudinally between the interior steel plate outer wall and outer steel plate inner wall
More spirals 8, the interior steel plate inner wall and outer steel plate outer wall towards it is external circumferentially and longitudinally on be also equipped with more screw threads
Reinforcing bar 8.
In the above-mentioned technical solutions, connector 3 is steel plate, is connection UHPC casing 5 and steel-pipe pile 6, steel plate is embedded in advance
In UHPC casing 5, in order to guarantee the stability of UHPC casing 5 and the connection of steel-pipe pile 6, steel plate is embedded in the secured of UHPC casing 5 in advance
Property is very important.The sheet steel sections being embedded in UHPC casing 5 in advance are divided into two layers, are arranged in inside and outside annular, two interlayers are set
It is equipped with spiral 8, two layers of outside is also equipped with spiral 8, and spiral 8, which is arranged, simultaneously by setting double-layer structure makes
UHPC casing 5 is obtained when pouring, one layer of more common steel plate binding force of the binding force between concrete and steel plate is more excellent,
Largely it ensure that the fastness that connector 3 is combined with UHPC casing 5.
In another technical solution, the UHPC casing 5, which is located at sea, is additionally provided with anti-collision structure comprising:
Pre-buried casing 9 is overlapped with 5 central axes of UHPC casing and is close to the setting of 5 lateral wall of UHPC casing, described pre-
Casing 9 is buried to pour with the UHPC casing 5 integrated molding；
Built-in fitting is multiple and is embedded in the pre-buried casing 9 in advance that the same circumferential direction along the pre-buried casing 9 is uniform
Multiple built-in fittings are arranged in interval, and are also provided with multiple built-in fittings along the same longitudinal direction of the pre-buried casing 9, and each built-in fitting connects
It is connected to the connecting rope 10 extended outside the pre-buried casing 9；
First floating column 11 is multiple and is to be close in advance by the binding of connecting rope 10 on same longitudinal multiple built-in fittings
Casing 9 is buried, also the second floating column 12 of fixed binding of connecting rope 10 of the first floating column 11, multiple second floating 12 uniform intervals positions of column are bound
In same circumferential direction and it is respectively positioned on the outside of the first floating column 11；
Third floats column 13, is close to the pre-buried casing 9 and is arranged, and it is floating at every adjacent two first that the third floats column 13
It is respectively provided with one between column 11, is integrated between the floating column 13 of the third and the first floating column 11 by wound and bound rope binding and third is floating
Column 13 is mutually close to the first floating column 11, and floating 13 upper surface of column of the third, which is recessed downwards, is formed with cavity 18, is inside combined with
5th floating column 15, the 5th floating 15 upper end of column protrude from the third and float outside 13 upper surface of column；
4th floating column 14, is respectively provided with one between every two adjacent the second floating columns 12, the 4th floating column 14 with
It is integrated between second floating column 12 by wound and bound rope binding and the 4th floating column 14 is mutually close to the second floating column 12, the described 4th is floating
The through-hole 17 of multiple perforations is provided on column 14；
Floating column 16 is connected, connection third floats column 13 and the 4th floating column 14 and in longitudinally disposed multiple, the floating column of connection
16 have the water stream channel of perforation, and one end perforation third of the water stream channel floats the cavity 18 of column 13, other end perforation the 4th
Through-hole 17 on floating column.
In the above-mentioned technical solutions, pile foundation is to be formed by connecting by two kinds of composite piles by connector, across the sea if encountered
The shock of ship etc., will affect the stability during pile foundation construction, therefore be provided at the sea in 5 outside of UHPC casing anti-
Structure is hit, the direct impact force biggish to UHPC casing 5 such as ship can be reduced to a certain extent.The pre-buried setting of casing 9 exists
5 outside of UHPC casing, and the two is to pour to be integrated when being prefabricated in the factory, after pile sinking, pre-buried 9 part of casing is under sea, portion
Point across the sea, the extension of connecting rope 10 when being prefabricated in the factory, in pre-buried casing 9 on prior pre-buried multiple built-in fittings and built-in fitting
Out outside pre-buried casing 9, to facilitate the later period to bind floating column, the setting of pre-buried casing 9 and built-in fitting so that the later period no longer need list
Only connection structure or in 5 lateral wall of UHPC casing drilling etc. to connect floating column.Multiple first floating columns 11 and multiple
Three floating columns 13 are close to pre-buried casing 9 and are arranged, and are the inside structures of anticollision, and multiple second floating columns 12 and multiple 4th floating columns 14
There is certain interval positioned at the outside of pre-buried casing 9, and with pre-buried casing 9, be the outboard structure of anticollision, play first layer
Anticollision effect, third float column 13 be connected by the first floating column 11, and the 4th floating column 14 be connected by the second floating column 12, thus
The quantity for reducing built-in fitting ensure that the stability and fastness of pre-buried 9 structure of casing.First floating column 11, the second floating column 12,
Third floats column 13 and the height of the 4th floating column 14 is not much different, and floats on sea, in the case where ship collision, lifts vertically
The floating column that the huge wave risen may be directed across outside enters inside, 5 lateral wall of UHPC casing is then impacted, to UHPC casing
5 play a degree of impact, and the floating column that in addition may cause outside and inside sinks, therefore is provided with the 5th floating column 15, sea
Face connection arranged below floats column 16 and water flow is entered in cavity 18, and the 5th floating column 15 is in floating state, can be in certain journey
Increase the height for floating column in inside on degree；Column 16 is floated in the connection of sea arrangement above, can be by a part of wave when ship etc. is hit
Water flow is quickly led in cavity 18, so that the 5th floating column 15 further floats, making inside float column to a certain extent can be resisted
The direct shock of ship.
In another technical solution, the first floating column 11, third float column 13, the 4th floating column 14 and the 5th floating column 15
For arc, arc may make mutual fitting and more preferable with being bonded for pre-buried casing 9, be more advantageous to anticollision；Described
Five floating 15 lower ends of column are connect with 18 bottom of cavity by rope so that the 5th floating 15 lower end of column is non-bulging in the third
Outside floating column 13.
Composite pile foundation of the invention and the comparison of ordinary pile foundation various aspects are as shown in the table:
In above table, stress performance, material cost calculate premise:
(1) single pile foundation outer diameter 1.6m, long 60m, mud face enter supporting course 30m with headwater depth 30m；
(2) the interim steel pile casting thickness 1.6cm of bored concrete pile, composite pile steel pipe thickness 3cm, UHPC tubular pole thickness 11cm；
(3) cast-in-place pile concrete and core concrete are C30.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. major diameter high-performance UHPC- steel pipe composite pile base characterized by comprising UHPC-RC composite pile, steel pipe composite pile
And connector, the connector connect UHPC-RC composite pile with steel pipe composite pile, the connector is located at minimum erosion line or less.
2. major diameter high-performance UHPC- steel pipe composite pile base as described in claim 1, which is characterized in that the UHPC-RC is multiple
Closing stake includes outside UHPC casing and internal cast-in-place concrete；The steel pipe composite pile includes that outside steel-pipe pile and inside are cast-in-place mixed
Solidifying soil.
3. major diameter high-performance UHPC- steel pipe composite pile base as described in claim 1, which is characterized in that composite pile foundation it is straight
Diameter is greater than 2 meters.
4. major diameter high-performance UHPC- steel pipe composite pile base as claimed in claim 2, which is characterized in that the UHPC casing
Wall thickness be 5-12 centimeter, the wall thickness of the steel-pipe pile is 1.5-3 centimeters.
5. major diameter high-performance UHPC- steel pipe composite pile base as claimed in claim 2, which is characterized in that the UHPC casing
Inner wall contains circumferential tongue and groove, to form shearing resistance key teeth.
6. major diameter high-performance UHPC- steel pipe composite pile base as described in claim 1, which is characterized in that the connector is ring
Shape steel plate, pre- to be embedded in UHPC casing, the upper end of the steel plate bottom and steel-pipe pile is welded as a whole.
7. major diameter high-performance UHPC- steel pipe composite pile base as claimed in claim 6, which is characterized in that the steel plate is pre-buried
In the outer steel plate of the annular of steel plate in the annular that the part in UHPC casing includes inside and outside, the interior steel plate outer wall and outer steel
More spirals are staggeredly equipped between plate inner wall on circumferentially and longitudinally, the interior steel plate inner wall and outer steel plate outer wall are equal
Towards it is external circumferentially and longitudinally on be also equipped with more spirals.
8. major diameter high-performance UHPC- steel pipe composite pile base as claimed in claim 2, which is characterized in that the UHPC casing
Anti-collision structure is additionally provided at sea comprising:
Pre-buried casing is overlapped with UHPC casing central axes and is close to the setting of UHPC casing lateral wall, the pre-buried casing
It is poured with UHPC casing integrated molding；
Built-in fitting is multiple and is embedded in the pre-buried casing in advance that the same circumferential uniform intervals along the pre-buried casing are set
Multiple built-in fittings are set, and are also provided with multiple built-in fittings along the same longitudinal direction of the pre-buried casing, each built-in fitting, which is respectively connected with, to be prolonged
Stretch out the connecting rope outside the pre-buried casing；
First floating column is multiple and is to be close to pre-buried casing by the connecting rope binding on same longitudinal multiple built-in fittings,
Connecting rope also the second floating column of fixed binding of the first floating column is bound, multiple second floating column uniform intervals are located at same circumferential and equal position
In the outside of the first floating column；
Third floats column, is close to the pre-buried casing setting, it is equal between every two adjacent the first floating columns that the third floats column
Setting one is integrated by wound and bound rope binding between the floating column of the third and the first floating column and third floats column and the first floating column phase
Mutually it is close to, the third floats column upper surface and is recessed is formed with cavity downwards, the 5th floating column is inside combined with, on the 5th floating column
End protrudes from the third and floats outside column upper surface；
4th floating column, is respectively provided with one between every two adjacent the second floating columns, the 4th floating column and the second floating column it
Between be integrated by wound and bound rope binding and the 4th floating column is mutually close to the second floating column, be provided with multiple pass through on the 4th floating column
Logical through-hole；
Connect floating column, connection third floats column and the 4th floating column and longitudinally disposed multiple, described to connect floating column and have perforation
Water stream channel, one end perforation third of the water stream channel floats the cavity of column, the other end penetrates through the through-hole on the 4th floating column.
9. major diameter high-performance UHPC- steel pipe composite pile base as claimed in claim 8, which is characterized in that the first floating column,
It is arc that third, which floats column, the 4th floating column and the 5th floating column, the 5th floating column lower end by rope connect with cavity bottom with
It is floated outside column so that the 5th floating column lower end is non-bulging in the third.
10. the construction method of major diameter high-performance UHPC- steel pipe composite pile base, which comprises the steps of:
S1: prefabrication UHPC casing and steel-pipe pile, and formula structure is connected as one by connector；
S2: by after connection UHPC casing and steel-pipe pile transport to stake position, lifted, positioned and hammered sinking；
S3: pile sinking to specified absolute altitude, drilling, scarfing cinder transfer steel reinforcement cage and pour internal core concrete；
S4: compound pile driving construction is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910127457.1A CN109881662B (en) | 2019-02-20 | 2019-02-20 | Large-diameter high-performance UHPC-steel pipe composite pile foundation and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910127457.1A CN109881662B (en) | 2019-02-20 | 2019-02-20 | Large-diameter high-performance UHPC-steel pipe composite pile foundation and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109881662A true CN109881662A (en) | 2019-06-14 |
| CN109881662B CN109881662B (en) | 2023-11-24 |
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| CN112049108A (en) * | 2020-09-30 | 2020-12-08 | 福州大学 | Sectional UHPC-concrete pipe pile and centrifugal forming construction method thereof |
| WO2021082769A1 (en) * | 2019-10-29 | 2021-05-06 | 国家电网有限公司 | Uhpc-nc composite pile foundation and construction method therefor for power transmission tower in saline-alkali area |
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| CN112049108A (en) * | 2020-09-30 | 2020-12-08 | 福州大学 | Sectional UHPC-concrete pipe pile and centrifugal forming construction method thereof |
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| CN109881662B (en) | 2023-11-24 |
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