CN107761718A - Super-section tilting pile foundation self-supporting excavation construction method - Google Patents
Super-section tilting pile foundation self-supporting excavation construction method Download PDFInfo
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- CN107761718A CN107761718A CN201710850304.0A CN201710850304A CN107761718A CN 107761718 A CN107761718 A CN 107761718A CN 201710850304 A CN201710850304 A CN 201710850304A CN 107761718 A CN107761718 A CN 107761718A
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Abstract
Super-section tilting pile foundation self-supporting excavation construction method, supporting measure, plant equipment used by work progress are effectively reduced, reduces construction costs.Comprise the following steps：1. pile foundation total cross-section ecto-entad first is divided into outer shroud section and pile foundation core, then outer shroud section is divided into circumferentially spaced-apart first excavation and pours unit, and poured the rear excavation between unit positioned at two adjacent first excavations and pour unit；2. alternation excavation on outer shroud section, first excavate each first excavate and pour unit；3. excavated after excavating again and pour unit；4. using ring-shaped cross-sectional part pile foundation as retaining wall, pile foundation core is excavated, casting concrete, forms reinforced concrete pile.
Description
Technical field
It is more particularly to a kind of to use super-section tilting pile foundation self-supporting excavation construction method the present invention relates to bridge.
Background technology
As gradual perfection is built in the deep development of Bridges in Our Country construction and national road network, high mountain gorge is crossed in west area
Bridge construction turn into main battle ground, the quantity and scale of Yunnan-Guizhou Chuan Deng western mountainous areas bridge construction increasingly highlight.To adapt to
Complicated unfavorable geology, large tilting formula pile foundation is more and more to be employed for mountain area Longspan Bridge.
Large tilting formula pile foundation uses super-section (area about 300m more at present2) arched forms, foundation pit opens
Dig meter and use mining method construction, manually bore quick-fried operation and be combined with mini-excavator, palpus strengthening supporting during excavation, it is ensured that basic
Adjoining rock stability before concrete placing.When total cross-section excavates, if geological conditions is too poor, too big potential safety hazard be present so that should
Method is untenable.Partial excavation method above and below generally use, partial excavation method is because excavated section size is larger, for stabilization
Surrouding rock deformation, then gib steelframe support size need to increase and combined bolting and shotcrete concrete thickness needs to thicken.
Above-mentioned interim measure can produce substantial amounts of working measure expense, will certainly increase considerably investment.Particularly work as bridge
Span is bigger, and large-scale inclined pile foundation section is also bigger, also can be higher using traditional construction method expense.Therefore, create a kind of
New construction method is significant.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of super-section tilting pile foundation self-supporting excavation construction side
Method, supporting measure, plant equipment used by work progress are effectively reduced, reduces construction costs.
The technical solution adopted for the present invention to solve the technical problems is as follows：
The super-section tilting pile foundation self-supporting excavation construction method of the present invention, comprises the following steps：
1. pile foundation total cross-section ecto-entad first is divided into outer shroud section and pile foundation core, then outer shroud section is divided
Unit is poured into circumferentially spaced-apart first excavation, and pours the rear excavation between unit positioned at two adjacent first excavations and pours unit；
2. alternation excavation on outer shroud section, first excavate each first excavate and pour unit, after being excavated to a bottom designed elevation, leading
Cheat surrounding and insert bar dowel, assembling reinforcement is installed, casting concrete, forms each first pouring reinforcement concrete block；
3. being excavated after excavating again and pouring unit, excavate after arriving stake bottom designed elevation, bar dowel inserted in excavation face, and dabbing with
First pouring reinforcement concrete block abutted surface, assembling reinforcement is installed, casting concrete, forms each after-pouring reinforced concrete block, respectively
After-pouring reinforced concrete block is formed as one ring-shaped cross-sectional part pile foundation with first pouring reinforcement concrete block consolidation；
4. using ring-shaped cross-sectional part pile foundation as retaining wall, pile foundation core is excavated, assembling reinforcement is installed, pours coagulation
Soil, form reinforced concrete pile.
The invention has the advantages that pile foundation total cross-section ecto-entad is divided into outer shroud section and pile foundation core,
Outer shroud section is divided into circumferentially spaced-apart first excavation again and pours unit, reduces excavation area, and the annular for completion of first constructing
The retaining wall that section pile foundation can be excavated as pile foundation core, reduce in work progress using steelframe support and combined bolting and shotcrete
Deng temporary construction measure, construction costs can be effectively saved.
Brief description of the drawings
This specification includes following five width accompanying drawing：
Fig. 1, Fig. 2 are in super-section tilting pile foundation self-supporting excavation construction method of the present invention in outer shroud section and pile foundation
Center portion graduation point, and first excavated on outer shroud section and pour unit, excavate the schematic diagram for pouring dividing elements afterwards；
Fig. 3 to Figure 10 is that the excavation in super-section tilting pile foundation self-supporting excavation construction method of the present invention is mixed with pouring
The step schematic diagram of soil is coagulated, wherein Fig. 7 and Fig. 8 are illustrated that pile foundation uses hollow section, and Fig. 9 and Figure 10 are illustrated that pile foundation is adopted
Use solid section.
Component and corresponding mark are shown in figure：Outer shroud section A, first excavate and pour unit A1, excavate pour unit afterwards
A2, pile foundation core B, first pouring reinforcement concrete block 10, after-pouring reinforced concrete block 20, concrete-pile 30.
Embodiment
With reference to legend is implemented, the present invention is further described.
Referring to figs. 1 to Figure 10, super-section tilting pile foundation self-supporting excavation construction method of the invention, including following step
Suddenly：
1. pile foundation total cross-section ecto-entad first is divided into outer shroud section A and pile foundation core B, then outer shroud section is drawn
It is divided into circumferentially spaced-apart first excavation and pours unit A1, and pour the rear excavation between unit positioned at two adjacent first excavations and pour list
First A2；
2. alternation excavation in outer shroud section A, first excavate each first excavate and pour unit A1, after being excavated to a bottom designed elevation,
Bar dowel is inserted in base tunnel surrounding, assembling reinforcement is installed, casting concrete, forms each first pouring reinforcement concrete block 10；
3. excavated after excavating again and pour unit A2, excavate after arriving stake bottom designed elevation, bar dowel, and dabbing inserted in excavation face
With the first abutted surface of pouring reinforcement concrete block 10, assembling reinforcement is installed, casting concrete, forms each after-pouring reinforced concrete block
20, each after-pouring reinforced concrete block 20 is formed as one ring-shaped cross-sectional part stake with first pouring reinforcement concrete block 10 consolidation
Base；
4. using ring-shaped cross-sectional part pile foundation as retaining wall, pile foundation core B is excavated, assembling reinforcement is installed, pours coagulation
Soil, form concrete-pile 30.
When the pile foundation uses solid section, outer shroud section A thickness is 2m or so；When the pile foundation uses hollow section,
Outer ring thickness determines according to structure stress.First excavate and pour unit A1, rear excavate pour unit A2Using fritter hand excavation, face
Product control is in 4m2Left and right.Each first excavate pours unit A1, rear excavate pour unit A2Dig to the designed elevation of stake bottom, by single list
First section is transported to in-site installation colligation, casting concrete in the good reinforcing bar of factory's concentrated processing.
Reference picture 7 and Fig. 8, if pile foundation stress is smaller, the pile foundation uses hollow section, the step 4. pile foundation center
Part B is excavated to 1.0 times of stake footpath scopes of pile crown.
Reference picture 9 and Figure 10, if pile foundation stress is larger, the pile foundation uses solid section, and the step is 4. in pile foundation
Center portion divides B to be excavated to a bottom designed elevation, concrete-pile 30 and each first pouring reinforcement concrete block 10, after-pouring armored concrete
Block 20 is consolidated in its length range and is integrated, and forms super-section tilting pile foundation.
It is described above simply to explain through diagrams the one of super-section tilting pile foundation self-supporting excavation construction method of the present invention
A little principles and step, are not intended to the present invention being confined in shown and described concrete structure and the scope of application, therefore every institute
Corresponding modification and the equivalent being utilized are possible to, belongs to the apllied the scope of the claims of the present invention.
Claims (3)
1. super-section tilting pile foundation self-supporting excavation construction method, comprises the following steps：
1. pile foundation total cross-section ecto-entad first is divided into outer shroud section (A) and pile foundation core (B), then outer shroud section is drawn
It is divided into circumferentially spaced-apart first excavation and pours unit (A1), and pour the rear excavation between unit positioned at two adjacent first excavations and pour list
Member (A2)；
Alternation excavation on outer shroud section 2. (A), first excavate each first excavate and pour unit (A1), after being excavated to a bottom designed elevation,
Base tunnel surrounding inserts bar dowel, installs assembling reinforcement, casting concrete, forms each first pouring reinforcement concrete block (10)；
3. excavated after excavating again and pour unit (A2), excavate after arriving stake bottom designed elevation, bar dowel inserted in excavation face, and dabbing with
First pouring reinforcement concrete block (10) abutted surface, assembling reinforcement is installed, casting concrete, forms each after-pouring reinforced concrete block
(20), each after-pouring reinforced concrete block (20) is formed as one ring section portion with first pouring reinforcement concrete block (10) consolidation
Divide pile foundation；
4. using ring-shaped cross-sectional part pile foundation as retaining wall, excavation pile foundation core (B), installation assembling reinforcement, casting concrete,
Form concrete-pile (30).
2. super-section tilting pile foundation self-supporting excavation construction method as claimed in claim 1, it is characterized in that：The pile foundation
Using hollow section, 4. pile foundation core (B) is excavated to 1.0 times of stake footpath scopes of pile crown to the step.
3. super-section tilting pile foundation self-supporting excavation construction method as claimed in claim 1, it is characterized in that：The pile foundation
Using solid section, 4. pile foundation core (B) is excavated to a bottom designed elevation, concrete-pile (30) and each elder generation to the step
Pouring reinforcement concrete block (10), after-pouring reinforced concrete block (20) are consolidated in its length range and are integrated, and form super large
Section tilting pile foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850304.0A CN107761718A (en) | 2017-09-20 | 2017-09-20 | Super-section tilting pile foundation self-supporting excavation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850304.0A CN107761718A (en) | 2017-09-20 | 2017-09-20 | Super-section tilting pile foundation self-supporting excavation construction method |
Publications (1)
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| CN107761718A true CN107761718A (en) | 2018-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710850304.0A Pending CN107761718A (en) | 2017-09-20 | 2017-09-20 | Super-section tilting pile foundation self-supporting excavation construction method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5858318A (en) * | 1981-10-02 | 1983-04-06 | Toshio Enoki | Laying of assembled pile |
| JPS58120918A (en) * | 1982-01-08 | 1983-07-19 | Enoki Toshio | Burying method for pile |
| JP2009057817A (en) * | 2007-08-03 | 2009-03-19 | Jfe Steel Kk | Building method for composite friction pile |
| CN104389317A (en) * | 2014-11-06 | 2015-03-04 | 中铁二院工程集团有限责任公司 | Ultralarge-sized oblique single-pile foundation structure of large-span arch bridge |
| CN105970990A (en) * | 2016-05-31 | 2016-09-28 | 中铁局集团有限公司 | Excavation and dado construction process for tilting type superlarge-section single-pile foundation |
| CN106759282A (en) * | 2016-12-30 | 2017-05-31 | 安徽省建筑科学研究设计院 | A kind of mechanical hole building method of super-large diameter hard rock bored concrete pile half |
-
2017
- 2017-09-20 CN CN201710850304.0A patent/CN107761718A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5858318A (en) * | 1981-10-02 | 1983-04-06 | Toshio Enoki | Laying of assembled pile |
| JPS58120918A (en) * | 1982-01-08 | 1983-07-19 | Enoki Toshio | Burying method for pile |
| JP2009057817A (en) * | 2007-08-03 | 2009-03-19 | Jfe Steel Kk | Building method for composite friction pile |
| CN104389317A (en) * | 2014-11-06 | 2015-03-04 | 中铁二院工程集团有限责任公司 | Ultralarge-sized oblique single-pile foundation structure of large-span arch bridge |
| CN105970990A (en) * | 2016-05-31 | 2016-09-28 | 中铁局集团有限公司 | Excavation and dado construction process for tilting type superlarge-section single-pile foundation |
| CN106759282A (en) * | 2016-12-30 | 2017-05-31 | 安徽省建筑科学研究设计院 | A kind of mechanical hole building method of super-large diameter hard rock bored concrete pile half |
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Application publication date: 20180306 |