CN107476156A - The Optimization Design of soft base reinforced embankment over piles - Google Patents
The Optimization Design of soft base reinforced embankment over piles Download PDFInfo
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- CN107476156A CN107476156A CN201710707358.1A CN201710707358A CN107476156A CN 107476156 A CN107476156 A CN 107476156A CN 201710707358 A CN201710707358 A CN 201710707358A CN 107476156 A CN107476156 A CN 107476156A
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- pile
- reinforcement
- stake
- bearing capacity
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of Optimization Design of soft base reinforced embankment over piles, basic parameter is inputted according to existing specification, and tentatively select the relevant information of soft foundation pile, it is determined that maximum clear spacing between allowing stake, with reference to bearing capacity of single pile, analysis selects appropriate stake spacing and pile cover size to make construction costs minimum, according to the parameter finally determined carry out soft foundation pile choose and engineering design, save engineering spending.
Description
Technical field
The present invention relates to technical field of civil engineering, more particularly to a kind of optimization design side of soft base reinforced embankment over piles
Method.
Background technology
Existing soft base reinforced embankment over piles design calculation theory can relatively reliable solve the monolithic stability of Roadbed on soft ground
Problem and settlement issues, but than more conservative, also larger optimization space.Such as, reinforced embankment over piles performance requirement is being met
Under the premise of, whether the bearing capacity of foundation pile can improveIn the case that embankment is little, if more economical pile-type can be used
And pile coverStake spacing or clear spacing also have great exploit potentialities, if under reinforcement cushion effect, can further increase
The content of the invention
Based on this, it is necessary to provide a kind of Optimization Design of soft base reinforced embankment over piles, undertaken with improving inter-pile soil
The utilization rate of load, and then expand pilespacing, so as to reach the purpose of optimization design.
To achieve these goals, the technical solution adopted by the present invention is as follows.
A kind of Optimization Design of soft base reinforced embankment over piles, including step：
Required according to roading, input the thickness of filled slope and road surface structare layer；
Thickness, pile-type, pile body diameter and the pile cover size of preliminary selected reinforcement cushion；
According to reinforcement cushion, the material to banket with road surface structare layer, determine the severe of reinforcement cushion, the cohesive strength banketed and
The angle of friction of road surface structare layer；
Required according to roading, determine road surface load, and calculate clear spacing and pile cover size between most timber pile；
According to reinforcement cushion and the material that bankets, reinforcement cushion and the deformation modulus to banket are determined, and GSZ
Tensile modulus；
Corresponding specification materials are looked into, input the severe, the pile cover ratio of reinforcement and reinforced complex coefficient of reinforcing bar, it is compound according to reinforcement
System number calculates reinforcement stretching force, and then determines the type and parameter of reinforcing body；
Survey to input the soil layer information that report provides, including soil layer title, collateral resistance characteristic value, end resistance characteristic value and soil
Thickness degree, the stake of pile-type selected by calculating is long and bearing capacity of single pile；
Examine whether bearing capacity of single pile meets design requirement, when being unsatisfactory for, adjust pile body diameter or stake is long, until
Meet；
According to identified pile-type, stake is long, clear spacing and reinforcement stretching force between pile body diameter, bearing capacity of single pile, most timber pile
Select soft foundation pile and detail design is carried out to it.
The Optimization Design of the soft base reinforced embankment over piles of the present invention, on the premise of technical requirements are met, selection is suitable
When design parameter, allow construction costs most to save, pile bearing capacity, analysis selects appropriate stake spacing and pile cover size allows construction costs
It is minimum, save engineering spending.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the Optimization Design of the soft base reinforced embankment over piles of the present invention.
Embodiment
Existing achievement in research is that transmission of the embankment to pile cover follows " soil arching effect " than more consistent viewpoint.Soil arch effect
The formation basic theory answered：Soil arching effect produces because of local differential deformation.During inter-pile soil particles sink, the soil particle on pile cover side sinks
It must lack, the latter has support resistance effect to the former；Because the folded poly- and support resistance of soil particle acts on, the scope of the soil body heavy less on pile cover top
Gradually stretched between stake；When developing into certain altitude, the soil body is sunk less when closing up between adjacent pile cover, just forms a soil arch；
The filled load more than height, it is delivered to by this soil arch on pile cover.At grade, the settling amount outside soil arch and stake
The settling amount of cap is close, and the settling amount in soil arch is then larger；When reaching native vault plane, equal settling amount is presented in the soil body,
Native land vault face is also known as " waiting heavy face ".
According to soil arching effect principle, when embankment filled soil such as is highly more than at the heavy face height, either pile cover scope or stake
Between native scope, the sedimentation of road bed is consistent, and relative settlement is produced without because stake is different from inter-pile soil.Therefore, if
Often require that the depth of fill is greater than the complete native pitch of arch in meter, even if being practically without occurring soil arch completely.
Soil arch completely has multiple computational theories, such as Britain's BS8006 codes, Northern Europe Nordic handbooks, Japanese detailed rules and regulations, Germany
Different soil arch theories is respectively adopted in DBGEO codes etc..
Existing design method has the problem of obvious：
1st, soil arch hypothesis does not meet actual conditions completely；
2nd, the result of calculation of reinforcement stretching force and actual conditions grave fault；
3rd, using empirical test method, it is difficult to obtain comparatively ideal design.
Technical staff needs to optimize design to existing design method.Exactly on the premise of technical requirements are met,
Appropriate design parameter is selected, allows construction costs most to save.For reinforced embankment over piles, it is determined that maximum clear spacing between allowing stake,
With reference to bearing capacity of single pile, analysis selects appropriate stake spacing and pile cover size to make construction costs minimum, is exactly an optimization design
Process.
The Optimization Design of the soft base reinforced embankment over piles of the present invention is divided into 4 bulks, is respectively that " basic parameter " " soil layer is believed
Breath and bearing capacity of single pile " " result of calculation " and " design selected parameter ".
On the existing data base of engineering, such as：Report, embankment planning condition etc. are drilled, it is corresponding by prompting, input
In " basic parameter " and " soil layer information and bearing capacity of single pile " module, you can result of calculation is shown in " result of calculation " module,
It is long that the optimal pile-type of the project, stake footpath and stake can be obtained in " design selected parameter " module, stake spacing and pile cover size, reinforcement
Type and technical indicator, the species of bed course and the parameter of thickness, as shown in figure 1, introducing each module and its execution separately below
Process.
First, basic parameter
Step 1：Required according to roading, input the thickness of filled slope and road surface structare layer.
Step 2：Just determine reinforcement cushion thickness.
Step 3：Just determine pile body diameter and pile cover size.
Step 4：According to reinforcement cushion, the material to banket with road surface structare layer, its severe, cohesive strength and angle of friction are determined.
Step 5：Required according to roading, determine road surface load.
Step 6：According to selected materials, corresponding specification materials are looked into, determine bed course and the deformation modulus to banket, and grid
Tensile modulus.
Step 7：According to market situation at that time, it is determined that the comprehensive unit price of stake, concrete and reinforcing bar.
Step 8：Corresponding specification materials are looked into, input the severe, the pile cover ratio of reinforcement and reinforced complex coefficient of steel.
2nd, soil layer information and bearing capacity of single pile
Step 9：Base area is surveyed including inputting soil layer information, including soil layer title, collateral resistance characteristic value, end resistance feature
Value and soil thickness.Be calculated selected pile-type stake is long and bearing capacity of single pile.
Step 10：Examine whether bearing capacity of single pile meets design requirement.When being unsatisfactory for, pile body diameter or stake are adjusted
It is long.
3rd, result of calculation
Step 11：After the completion of above-mentioned steps, examine and calculate whether output result meets code requirement.
4th, selected parameter is designed
Step 12：When result of calculation is satisfied by code requirement, it can obtain designing most preferably between value, including stake diameter, stake
Away from, pile cover size, GSZ stretching resistance, reinforcement cushion thickness and filled slope.
Embodiment described above only expresses embodiments of the present invention, and its description is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art,
On the premise of not departing from present inventive concept, various modifications and improvements can be made, these belong to protection scope of the present invention.
Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (1)
1. a kind of Optimization Design of soft base reinforced embankment over piles, it is characterised in that including step：
Required according to roading, input the thickness of filled slope and road surface structare layer；
Thickness, pile-type, pile body diameter and the pile cover size of preliminary selected reinforcement cushion；
According to reinforcement cushion, the material to banket with road surface structare layer, severe, the cohesive strength banketed and the road surface of reinforcement cushion are determined
The angle of friction of structure sheaf；
Required according to roading, determine road surface load, and calculate clear spacing and pile cover size between most timber pile；
According to reinforcement cushion and the material to banket, reinforcement cushion and the deformation modulus to banket, and the tension of GSZ are determined
Modulus；
Corresponding specification materials are looked into, input the severe, the pile cover ratio of reinforcement and reinforced complex coefficient of reinforcing bar, according to reinforced complex system
Number calculates reinforcement stretching force, and then determines the type and parameter of reinforcing body；
Survey to input the soil layer information that report provides, including soil layer title, collateral resistance characteristic value, end resistance characteristic value and soil layer thickness
Degree, the stake of pile-type selected by calculating is long and bearing capacity of single pile；
Examine whether bearing capacity of single pile meets design requirement, when being unsatisfactory for, adjustment pile-type, pile body diameter or stake are long, directly
To satisfaction；
According to identified pile-type, stake is long, clear spacing and the selection of reinforcement stretching force between pile body diameter, bearing capacity of single pile, most timber pile
Soft foundation pile simultaneously carries out detail design to it.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710707358.1A CN107476156B (en) | 2017-08-17 | 2017-08-17 | Optimization design method of soft foundation pile bearing reinforced embankment |
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| CN201710707358.1A CN107476156B (en) | 2017-08-17 | 2017-08-17 | Optimization design method of soft foundation pile bearing reinforced embankment |
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| CN107476156A true CN107476156A (en) | 2017-12-15 |
| CN107476156B CN107476156B (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842805A (en) * | 2018-06-16 | 2018-11-20 | 扬州大学 | Geosynthetic reinforced pile supported embankments on soft soil pile-soil stress determines method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591903A (en) * | 2009-06-19 | 2009-12-02 | 上海现代建筑设计(集团)有限公司 | Method for processing long-pile short-pier composite foundation |
| CN101831895A (en) * | 2010-03-18 | 2010-09-15 | 天津市市政工程设计研究院 | Method for determining soft soil foundation landfill site foundation treatment mode based on foundation bearing capacity |
| CN103605839A (en) * | 2013-11-04 | 2014-02-26 | 河海大学 | Finite element modeling analysis method for pile type reinforcement embankment |
| CN104573214A (en) * | 2014-12-31 | 2015-04-29 | 铁道第三勘察设计院集团有限公司 | Calculation method of soil engineering grid tensile force inside multilayer ribbed cushion layer |
| CN104598296A (en) * | 2015-01-23 | 2015-05-06 | 陈建永 | Numerical simulation analysis method for deformation of soft soil deep foundation pit |
| CN106676992A (en) * | 2017-02-14 | 2017-05-17 | 湖南大学 | Design method for anchoring type pile-supported and reinforced embankment for treating shoreside soft-soil roadbed |
-
2017
- 2017-08-17 CN CN201710707358.1A patent/CN107476156B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591903A (en) * | 2009-06-19 | 2009-12-02 | 上海现代建筑设计(集团)有限公司 | Method for processing long-pile short-pier composite foundation |
| CN101831895A (en) * | 2010-03-18 | 2010-09-15 | 天津市市政工程设计研究院 | Method for determining soft soil foundation landfill site foundation treatment mode based on foundation bearing capacity |
| CN101831895B (en) * | 2010-03-18 | 2011-05-04 | 天津市市政工程设计研究院 | Method for determining soft soil foundation landfill site foundation treatment mode based on foundation bearing capacity |
| CN103605839A (en) * | 2013-11-04 | 2014-02-26 | 河海大学 | Finite element modeling analysis method for pile type reinforcement embankment |
| CN104573214A (en) * | 2014-12-31 | 2015-04-29 | 铁道第三勘察设计院集团有限公司 | Calculation method of soil engineering grid tensile force inside multilayer ribbed cushion layer |
| CN104598296A (en) * | 2015-01-23 | 2015-05-06 | 陈建永 | Numerical simulation analysis method for deformation of soft soil deep foundation pit |
| CN106676992A (en) * | 2017-02-14 | 2017-05-17 | 湖南大学 | Design method for anchoring type pile-supported and reinforced embankment for treating shoreside soft-soil roadbed |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842805A (en) * | 2018-06-16 | 2018-11-20 | 扬州大学 | Geosynthetic reinforced pile supported embankments on soft soil pile-soil stress determines method |
| CN108842805B (en) * | 2018-06-16 | 2020-06-09 | 扬州大学 | Pile-supported reinforced embankment pile soil stress determination method |
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| CN107476156B (en) | 2020-04-21 |
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