CN108179757A - The pile foundation structure and construction method of high gradient slope containing study on weak faults - Google Patents
The pile foundation structure and construction method of high gradient slope containing study on weak faults Download PDFInfo
- Publication number
- CN108179757A CN108179757A CN201810099451.3A CN201810099451A CN108179757A CN 108179757 A CN108179757 A CN 108179757A CN 201810099451 A CN201810099451 A CN 201810099451A CN 108179757 A CN108179757 A CN 108179757A
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- Prior art keywords
- pile foundation
- casing
- study
- soil
- weak faults
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The present invention relates to a kind of pile foundation structures and construction method of the high gradient slope containing study on weak faults, pile foundation structure includes pile foundation, casing and separation layer, casing is fixedly connected as an entirety on pile foundation top and with pile foundation top, casing upper end is flushed with pile foundation, lower end passes through study on weak faults, separation layer is filled between casing outer surface and Rock And Soil, casing smooth outer surface is smooth, separation layer is made of non-coherent material, rubbing action when pile foundation top is in direct contact Rock And Soil is much larger than the rubbing action between the rubbing action between casing and separation layer and separation layer and Rock And Soil.Pile foundation and Rock And Soil are locally isolated by the present invention, ensure that the side frictional resistance of pile foundation mainly concentrates performance in the stable following Rock And Soil of study on weak faults, avoid side frictional resistance that the high gradient slope unstability for playing and being likely to occur in study on weak faults more than Rock And Soil is concentrated to collapse, so as to ensure that the safety of project subject structure.
Description
Technical field
The invention belongs to engineering construction fields, and in particular to a kind of pile foundation structure of high gradient slope containing study on weak faults and
Construction method.
Background technology
Pile foundation structure is widely used in the engineering constructions such as highway, railway, Fang Jian, municipal administration, mine, water power, geological disaster neck
Domain.Research data show be not the side frictional resistance distribution in same stratum pile foundation plinth yet it is equally distributed along pile body, it is right
In general pile foundation, frictional resistance distribution in side shows as up big and down small.But under given conditions, the side frictional resistance of pile foundation excessively collects
In not to be conducive to pile foundation in the middle and upper part of pile foundation be the safety in superstructure, such as the base in China mountainous region in middle and western China
In plinth process of construction, often pile foundation must be necessarily arranged on high gradient slope, and generally there are tomography, crushed zone, weak slips for side slope
The study on weak faults such as face, if the side frictional resistance of pile foundation mainly concentrates performance more than study on weak faults, according to active force and reaction force
Principle necessarily has a power straight down to act on study on weak faults, when the friction at the angle of inclination of study on weak faults and tomography interface
When coefficient meets certain relationship, it may result in Rock And Soil more than study on weak faults and downslide unstability occur, and pile foundation is made additionally to hold
The sliding force for being parallel to study on weak faults by one, may cause pile foundation by curved, sheared destruction, this is clearly in engineering construction
It should avoid the problem that as far as possible.
Invention content
The object of the present invention is to provide a kind of pile foundation structure and construction method of the high gradient slope containing study on weak faults, this hairs
It is bright to be locally isolated pile foundation and Rock And Soil, ensure that the side frictional resistance of pile foundation mainly concentrates performance to break in stable weakness
In the following Rock And Soil of layer, side frictional resistance is avoided to concentrate the high gradient slope unstability for playing and being likely to occur in study on weak faults more than Rock And Soil
It collapses, so as to ensure that the safety of project subject structure.
The technical solution adopted in the present invention is：
A kind of pile foundation structure of the high gradient slope containing study on weak faults, including pile foundation, casing and separation layer, casing is in stake
Basic top and be fixedly connected as an entirety with pile foundation top, casing upper end is flushed with pile foundation, lower end pass through it is weak disconnected
Layer, separation layer are filled between casing outer surface and Rock And Soil, and casing smooth outer surface is smooth, and separation layer is by non-coherent material group
Rubbing action when being in direct contact Rock And Soil into, pile foundation top much larger than the rubbing action between casing and separation layer and every
Rubbing action between absciss layer and Rock And Soil.
Further, the material of pile foundation be armored concrete, plain concrete, steel, timber or composite material, pile foundation
Section to be round, rectangular or special-shaped.
Further, the material of casing is steel, plastics, timber or composite material.
Further, casing is the steel casing of 3~8mm of wall thickness, and steel casing surfaces externally and internally carries out processing of rust removing, steel
Brushing smooth surface in casing outer surface is painted or pitch.
Further, separation layer is sand or plastic grain.
Further, separation layer is the sand that grain size is 0.25~0.5mm.
Further, pile foundation top is adhesively fixed with casing by own material, outer adding additives are adhesively fixed or weld
Connect fixation.
Further, it is more than 1m that casing lower end, which passes through study on weak faults,.
A kind of pile foundation structure construction method of the high gradient slope containing study on weak faults, first according to stake diameter pore-forming is designed, then
The upward reaming of depth below study on weak faults chooses the casing consistent with counterbore depth, to appearance in casing to stake top absolute altitude
After face carries out smooth treatment, casing is hung into reaming and keeps placed in the middle, fills and dissipates between casing outer surface and Rock And Soil
Bulk material forms separation layer, finally carries out pile foundation construction.
Further, the material of pile foundation is armored concrete, plain concrete, steel, timber or composite material, works as pile foundation
The material of plinth is first transferred steel reinforcement cage, is poured casing as the template of pile foundation for armored concrete and when carrying out pile foundation construction
Pile foundation concrete is built, pile foundation is bonded as an entirety with casing after concrete final set.
The beneficial effects of the invention are as follows：
Pile foundation and Rock And Soil are locally isolated by the casing and separation layer on pile foundation top, are said on stricti jurise,
Rubbing action between casing and Rock And Soil, which still has, (will accurately measure the side that its rubbing action can be tested by interface shearing
Formula determines its friction coefficient, and the normal force of interface shearing experiment can be calculated by earth pressure at rest to be determined), but depositing due to separation layer
Non-coherent material is being used, the side frictional resistance distribution situation of pile foundation is being can actively regulate, changes previous pile foundation side frictional resistance
Up big and down small situation is distributed, ensures that the side frictional resistance of pile foundation mainly concentrates performance in the stable following Rock And Soil of study on weak faults
In, avoid side frictional resistance that the high gradient slope unstability for playing and being likely to occur in study on weak faults more than Rock And Soil is concentrated to collapse, so as to protect
The safety of project subject structure is demonstrate,proved.
Description of the drawings
Fig. 1 is the elevational schematic view of pile foundation plinth structure of the embodiment of the present invention.
Fig. 2 is that pile foundation plinth structure of the embodiment of the present invention applies the schematic diagram in the high gradient slope containing study on weak faults.
The schematic cross-section of A-A in Fig. 3 Fig. 1.
Fig. 4 is that pile foundation structure applies the stress diagram in the high gradient slope containing study on weak faults.
In figure：1- pile foundations；2- casings；3- separation layers；4- study on weak faults；5- Rock And Soils.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1 to Figure 3, a kind of pile foundation structure of the high gradient slope containing study on weak faults, including pile foundation 1, casing 2
With separation layer 3, casing 2 is sleeved on 1 top of pile foundation and is fixedly connected as an entirety, 2 upper end of casing and stake with 1 top of pile foundation
Basis 1 flushes, lower end passes through study on weak faults 4, and separation layer 3 is filled between 2 outer surface of casing and Rock And Soil 5,2 outer surface of casing
Smooth, separation layer 3 is made of non-coherent material, and rubbing action when 1 top of pile foundation is in direct contact Rock And Soil 5 is much larger than
The rubbing action between rubbing action and separation layer 3 and Rock And Soil 5 between casing 2 and separation layer 3.
Wherein, the material of pile foundation 1 can be armored concrete, plain concrete, steel, timber, composite material or other
Material, the section of pile foundation 1 can be round, rectangular or special-shaped, and the material of casing 2 can be steel, plastics, timber or compound
Material, separation layer 3 can be sand or plastic grain.
Wherein, 1 top of pile foundation with casing 2 can be adhesively fixed by own material, outer adding additives are adhesively fixed or
It is welded and fixed.
A kind of pile foundation structure construction method of the high gradient slope containing study on weak faults, first according to stake diameter pore-forming is designed, then
The upward reaming of depth of the study on weak faults below 4 to stake top absolute altitude (counter bore diameter is 1.05~1.1 times of design stake diameter), choose
Casing 2 after carrying out smooth treatment to 2 surfaces externally and internally of casing, is hung into reaming and kept by the casing 2 consistent with counterbore depth
Between two parties, non-coherent material is filled between 2 outer surface of casing and Rock And Soil 5 and forms separation layer 3, then transferred steel reinforcement cage, will protect
Cylinder 2 pours 1 concrete of pile foundation as the template of pile foundation 1, after concrete final set pile foundation 1 and casing 2 be bonded as one it is whole
Body.In the present embodiment, pile foundation 1 is armored concrete, and casing 2 is the steel casing 2 of 3~8mm of wall thickness, and steel casing 2 is hung
Before putting, 2 surfaces externally and internally of steel casing carries out processing of rust removing, 2 outer surface brushing smooth surface of steel casing paint or pitch, steel casing
2 lower ends pass through study on weak faults 4, and more than 1m, separation layer 3 is the sand that grain size is 0.25~0.5mm.In fact, the material of pile foundation 1
Material can also be plain concrete, steel, timber, composite material or other materials.
In the present invention, the casing 2 on 1 top of pile foundation and separation layer 3 by pile foundation 1 and Rock And Soil 5 carried out part every
From being said on stricti jurise, the rubbing action between casing 2 and Rock And Soil 5 still has that (accurately to measure its rubbing action can lead to
The mode for crossing interface shearing experiment determines its friction coefficient, and the normal force of interface shearing experiment can be calculated really by earth pressure at rest
It is fixed), as shown in figure 4, but due to the presence of separation layer, using non-coherent material, can actively regulate the side frictional resistance of pile foundation 1
Distribution situation changes previous 1 side frictional resistance of pile foundation and is distributed up big and down small situation, ensures that the side frictional resistance of pile foundation 1 mainly collects
It is middle to play in stable study on weak faults below 4 in Rock And Soil 5, side frictional resistance is avoided to concentrate and is played in more than 4 Rock And Soil 5 of study on weak faults
When the high gradient slope unstability that is likely to occur collapse, so as to ensure that the safety of project subject structure.
It should be understood that for those of ordinary skills, can be improved or converted according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of pile foundation structure of the high gradient slope containing study on weak faults, it is characterised in that：Including pile foundation, casing and isolation
Layer, casing are fixedly connected as an entirety on pile foundation top and with pile foundation top, and casing upper end is flushed with pile foundation, lower end
Across study on weak faults, separation layer is filled between casing outer surface and Rock And Soil, and casing smooth outer surface is smooth, and separation layer is by dissipating
Bulk material forms, and rubbing action when pile foundation top is in direct contact Rock And Soil is much larger than the friction between casing and separation layer
Effect and the rubbing action between separation layer and Rock And Soil.
2. the pile foundation structure of the high gradient slope containing study on weak faults as described in claim 1, it is characterised in that：The material of pile foundation
Expect for armored concrete, plain concrete, steel, timber or composite material, the section of pile foundation is round, rectangular or special-shaped.
3. the pile foundation structure of the high gradient slope containing study on weak faults as described in claim 1, it is characterised in that：The material of casing
For steel, plastics, timber or composite material.
4. the pile foundation structure of the high gradient slope containing study on weak faults as claimed in claim 3, it is characterised in that：Casing is wall thickness
The steel casing of 3~8mm, steel casing surfaces externally and internally carry out processing of rust removing, steel casing outer surface brushing smooth surface paint or drip
It is green.
5. the pile foundation structure of the high gradient slope containing study on weak faults as described in claim 1, it is characterised in that：Separation layer is sand
Son or plastic grain.
6. the pile foundation structure of the high gradient slope containing study on weak faults as claimed in claim 5, it is characterised in that：Separation layer is grain
Diameter is the sand of 0.25~0.5mm.
7. the pile foundation structure of the high gradient slope containing study on weak faults as described in claim 1, it is characterised in that：Pile foundation top
It is adhesively fixed with casing by own material, outer adding additives are adhesively fixed or are welded and fixed.
8. the pile foundation structure of the high gradient slope containing study on weak faults as described in claim 1, it is characterised in that：It wears casing lower end
Study on weak faults is crossed more than 1m.
9. a kind of pile foundation structure construction method of the high gradient slope containing study on weak faults, it is characterised in that：First according to design stake diameter
The casing consistent with counterbore depth is chosen in pore-forming, the then upward reaming of the depth below study on weak faults to stake top absolute altitude, to shield
After cylinder surfaces externally and internally carries out smooth treatment, casing is hung into reaming and keeps placed in the middle, casing outer surface and Rock And Soil it
Between filling non-coherent material formed separation layer, finally carry out pile foundation construction.
10. the pile foundation structure construction method of the high gradient slope containing study on weak faults as claimed in claim 9, it is characterised in that：
The material of pile foundation is armored concrete, plain concrete, steel, timber or composite material, when the material of pile foundation is mixed for reinforcing bar
When coagulating soil and carrying out pile foundation construction, steel reinforcement cage is first transferred, pile foundation concrete is poured using casing as the template of pile foundation, mixed
Pile foundation is bonded as an entirety with casing after solidifying soil final set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810099451.3A CN108179757A (en) | 2018-01-31 | 2018-01-31 | The pile foundation structure and construction method of high gradient slope containing study on weak faults |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810099451.3A CN108179757A (en) | 2018-01-31 | 2018-01-31 | The pile foundation structure and construction method of high gradient slope containing study on weak faults |
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| Publication Number | Publication Date |
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| CN108179757A true CN108179757A (en) | 2018-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810099451.3A Pending CN108179757A (en) | 2018-01-31 | 2018-01-31 | The pile foundation structure and construction method of high gradient slope containing study on weak faults |
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| CN (1) | CN108179757A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853313A (en) * | 2019-01-17 | 2019-06-07 | 浙江绿艺园林工程有限公司 | Pile foundation side soft soil foundation road eliminates frictional resistance structure and construction method |
| CN109853530A (en) * | 2019-01-21 | 2019-06-07 | 中建五局土木工程有限公司 | Supporting bridge structure and the Bridge Pile Foundation Construction technique for increasing pile foundation flexibility |
| CN110747880A (en) * | 2019-10-30 | 2020-02-04 | 中建五局第三建设有限公司 | Construction method of high slope isolation bearing platform |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05346019A (en) * | 1992-06-15 | 1993-12-27 | Chiyoda Corp | Execution method for cast-in-place pile applied with no negative frictional force |
| CN203654272U (en) * | 2013-12-30 | 2014-06-18 | 中铁第四勘察设计院集团有限公司 | Lateral friction boring filling pile for isolation pile |
| CN107268610A (en) * | 2017-06-19 | 2017-10-20 | 中铁大桥局第七工程有限公司 | A kind of local antifriction resistance piling strtucture and its construction method |
| CN107386277A (en) * | 2017-07-25 | 2017-11-24 | 中建五局土木工程有限公司 | Flexible foundation pile side friction isolation structure and construction method |
| CN208309599U (en) * | 2018-01-31 | 2019-01-01 | 武汉市市政建设集团有限公司 | The pile foundation structure of high gradient slope containing study on weak faults |
-
2018
- 2018-01-31 CN CN201810099451.3A patent/CN108179757A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05346019A (en) * | 1992-06-15 | 1993-12-27 | Chiyoda Corp | Execution method for cast-in-place pile applied with no negative frictional force |
| CN203654272U (en) * | 2013-12-30 | 2014-06-18 | 中铁第四勘察设计院集团有限公司 | Lateral friction boring filling pile for isolation pile |
| CN107268610A (en) * | 2017-06-19 | 2017-10-20 | 中铁大桥局第七工程有限公司 | A kind of local antifriction resistance piling strtucture and its construction method |
| CN107386277A (en) * | 2017-07-25 | 2017-11-24 | 中建五局土木工程有限公司 | Flexible foundation pile side friction isolation structure and construction method |
| CN208309599U (en) * | 2018-01-31 | 2019-01-01 | 武汉市市政建设集团有限公司 | The pile foundation structure of high gradient slope containing study on weak faults |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853313A (en) * | 2019-01-17 | 2019-06-07 | 浙江绿艺园林工程有限公司 | Pile foundation side soft soil foundation road eliminates frictional resistance structure and construction method |
| CN109853313B (en) * | 2019-01-17 | 2024-04-30 | 浙江绿艺建设有限公司 | Pile foundation side soft soil foundation road friction resistance eliminating structure and construction method |
| CN109853530A (en) * | 2019-01-21 | 2019-06-07 | 中建五局土木工程有限公司 | Supporting bridge structure and the Bridge Pile Foundation Construction technique for increasing pile foundation flexibility |
| CN109853530B (en) * | 2019-01-21 | 2021-05-04 | 中建五局土木工程有限公司 | Bridge supporting structure and bridge pile foundation construction process for increasing pile foundation flexibility |
| CN110747880A (en) * | 2019-10-30 | 2020-02-04 | 中建五局第三建设有限公司 | Construction method of high slope isolation bearing platform |
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