CN107815937B - Branch's dam filling construction of Expressway Widening roadbed - Google Patents
Branch's dam filling construction of Expressway Widening roadbed Download PDFInfo
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- CN107815937B CN107815937B CN201711038298.5A CN201711038298A CN107815937B CN 107815937 B CN107815937 B CN 107815937B CN 201711038298 A CN201711038298 A CN 201711038298A CN 107815937 B CN107815937 B CN 107815937B
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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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- 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
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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- 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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of branch's dam filling constructions of Expressway Widening roadbed, comprising the following steps: step 1 carries out basement process to the soil body a certain range of on the outside of the base of old road；Step 2 fills external embankment on the soil body for completed basement process, and the outer edge of the external embankment and bottom are overlapped with the side slope of newly-built embankment and substrate respectively；Step 3 fills internal embankment, new and old roadbed is made to form entirety when the settlement after construction on external roadbed top meets feasible value；Step 4 fills new roadbed when the settlement after construction of entire embankment meets feasible value.The differential settlement of new and old roadbed and the adverse effect caused by existing roadbed in road widening can be effectively reduced in the dam filling construction.
Description
Technical field
The present invention relates to a kind of dam filling constructions of road widening, and in particular to a kind of substep dam filling construction belongs to building work
Journey field.
Background technique
In recent years, increasing rapidly with Freeway Traffic Volume, the part highway built in early days is had reached
Or be more than design capacity, these highways are faced with the problem of enlarging is widened.
Highway fills generally using horizontal slice filling process, such as number of patent application is 201310281073.8
Patent, application No. is 201310561704.1 patents；Since the ground consolidation degree of new and old roadbed is different, using the method into
The enlarging of walking along the street base is easy to cause the relative settlement of new and old roadbed, makes new and old roadbed binding site pavement cracking, causes when serious
New roadbed globality is collapsed.
In addition, the sedimentation for newly filling out roadbed can also cause the related sedimentation of old road base, old road base is made to deform, surface occurs
Crack.Therefore, it is urgently to be solved heavy in Freeway Widening and Extension engineering for how reducing influence of the new roadbed to existing roadbed
Want problem.
Summary of the invention
In consideration of it, the present invention proposes that a kind of branch's dam filling construction of Expressway Widening roadbed, the dam filling construction can be effective
It reduces the differential settlement of new and old roadbed in road widening and is adversely affected caused by existing roadbed.
In order to achieve the above objectives, The technical solution adopted by the invention is as follows:
Branch's dam filling construction of Expressway Widening roadbed, comprising the following steps:
Step 1 carries out basement process to the soil body a certain range of on the outside of the base of old road；
Step 2 fills external embankment on the soil body for completed basement process, the outer edge of the external embankment and
Bottom is overlapped with the side slope of newly-built embankment and substrate respectively；So that forming gap between external embankment and old road base；
Step 3 fills internal embankment, forms new and old roadbed when the settlement after construction on external roadbed top meets feasible value
It is whole；
Step 4 fills new roadbed when the settlement after construction of entire embankment meets feasible value.
Further, the method for basement process is in step 1: using include but is not limited to water penetration pile, permeable concrete pile,
The serial or parallel connection built pile of broken stone pile, permeable concrete pile and broken stone pile, cement mixing method, CFG to ground at
Reason.
Further, basement process range be 0.3~0.8 times of new roadbed bottom width, and the diameter of reinforcing soil pile and
Depth, spacing is arranged should requirement determining through Stability Checking Calculation and should meeting settlement after construction；
Further, the section configuration of external embankment is similar to trapezoidal, outer edge and bottom respectively with newly-built embankment
Side slope and substrate are overlapped, and the inward flange of embankment is the slope that the gradient is 1:1.5~1:1, make external roadbed inward flange not with old road
Base contact newly fills out influence of the sedimentation of roadbed to old road base to reduce.
Further, the shape of the inside roadbed is similar to up-side down triangle.
Further, the highest face of the inside roadbed and the highest face of external roadbed be in the same plane.
Further, base geological condition in base area, which is asked, calculates ground settlement after construction feasible value, and can using settlement observation curve
To calculate settlement after construction.
Further, the enlarging embankment height is the sum of embankment oneself height and Embankment Subsidence value.
Further, the new roadbed, which is filled, integrally fill using placement in layers mode, during placement in layers
It should carry out settling and stablize observation, and strict control fill core concrete, in order to avoid too fast cause foundation failure due to filling.
Beneficial effects of the present invention are as follows:
(1) before roadbed filling, pile foundation reinforcement first is carried out to the new ground in part close to old road base side.After reinforcing
Ground not only reduces the consolidation settlement of new ground；Also the sedimentation of new widening subgrade is isolated at pile foundation simultaneously, eliminates new road
Base settles the adverse effect of the old road base to caused by.In addition, being carried out to the foundation soil within the scope of 0.3~0.8 times of new width of subgrade
It reinforces, the foundation strength of reinforcing area is not only made to be fully used, moreover it is possible to greatly saving project cost.
(2) embankment branch carries out.The new embankment in part (i.e. external road is first being filled outside the base a certain range of old road
Dike), the old and new's embankment does not contact with each other, and fills internal embankment after external embankment consolidation a period of time, new and old roadbed is made to form entirety.
It is theoretical according to soil mechanics principle of effective stress and stress roadbed, due to the consolidation under new Roadbed Soil Gravitative Loads in the first stage
Weak soil intensity and horizontal stress under new and old roadbed gap can be made to improve, thus second stage can be effectively reduced and banketed to old road
The additional deformation that base generates, thus to fill method smaller than the deformation that traditional placement in layers generates old road base for this branch,
The variation of old road base grade of side slope caused by capable of reducing simultaneously because of new roadbed filling, thus effectively new and old roadbed can be avoided to combine
The cracking of the cracking and old road base itself in portion.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
The schematic diagram that Fig. 1 present invention constructs；
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, filling for highway exists in the prior art and is generally filled using horizontal slice
Technique carries out roadbed enlarging using the method and is easy to cause new and old roadbed since the ground consolidation degree of new and old roadbed is different
Relative settlement makes new and old roadbed binding site pavement cracking, and new roadbed globality is caused to be collapsed when serious.In addition, newly filling out roadbed
Sedimentation can also cause the related sedimentation of old road base, so that old road base is deformed, crack occurs in surface.Therefore, how to reduce new
Influence of the roadbed to existing roadbed is major issue urgently to be solved in Freeway Widening and Extension engineering.In consideration of it, of the invention
It is proposed a kind of branch's dam filling construction of Expressway Widening roadbed, this method can significantly reduce the differential settlement of new and old roadbed with
And the horizontal displacement of roadbed, to reduce the adverse effect caused by the base of old road；In order to solve technical problem as above, the application
Propose a kind of branch's dam filling construction of Expressway Widening roadbed.
In a kind of typical embodiment of the application, as shown in Figure 1, the side of filling, branch of Expressway Widening roadbed
Method, comprising the following steps:
(1) basement process
Basement process is carried out to the soil body a certain range of on the outside of the base of old road；Basement process type can be used permeable
Stake, permeable concrete pile, broken stone pile, the serial or parallel connection built pile of permeable concrete pile and broken stone pile, cement mixing method,
CFG etc., basement process range is the width of 0.3~0.8 times of new roadbed bottom, the diameter of reinforcing soil pile and be arranged depth,
Away from should requirement determining through Stability Checking Calculation and that settlement after construction should be met；As shown in Figure 1.
(2) external embankment is filled
In the new embankment in placement in layers part outside the base a certain range of old road, i.e., external embankment, the section shape of external embankment
Shape is similar to trapezoidal, and outer edge and bottom are overlapped with the side slope of newly-built embankment and substrate respectively, and the inward flange of embankment is the gradient
It for the slope of 1:1.5~1:1, contacts external roadbed inward flange with old road base, newly fills out the sedimentation of roadbed to old road to reduce
Base does not impact.
Before roadbed filling, pile foundation reinforcement first is carried out to the new ground in part close to old road base side.Ground after reinforcing
Base not only reduces the consolidation settlement of new ground；Also the sedimentation of new widening subgrade is isolated at pile foundation simultaneously, eliminates new roadbed
Settle the adverse effect of the old road base to caused by.
It is theoretical according to soil mechanics principle of effective stress and stress roadbed, due to new Roadbed Soil Gravitative Loads in the first stage
Under consolidation weak soil intensity under new and old roadbed gap and horizontal stress can be made to improve, thus second stage can be effectively reduced and filled out
The additional deformation that soil generates old road base, thus method is filled than change that traditional placement in layers generates old road base by this branch
Shape wants small, to avoid the cracking of new and old roadbed engaging portion and the cracking of old road base itself.
(3) internal embankment is filled
Base area base geological condition, which is asked, calculates ground settlement after construction feasible value, and after can calculating work using settlement observation curve
Sedimentation.When the settlement after construction on external roadbed top meets feasible value, internal embankment is filled, new and old roadbed is made to form entirety.It is interior
The shape of the cross section of portion's embankment is similar to up-side down triangle；Internal embankment and external embankment form the entire embankment of widening road；
Extending embankment height is the sum of embankment oneself height and Embankment Subsidence value.
(4) the new roadbed of placement in layers.
When the settlement after construction of entire embankment meets feasible value, new roadbed is filled.Roadbed is filled using placement in layers mode
It carries out entirety to fill, should carry out settling and stablizing observation, and strict control fill core concrete during placement in layers, in order to avoid due to filling out
It builds and too fast causes foundation failure.
Specific example: the branch of soft soil foundation highway widening fills
The ground of certain highway extension project is made of silty bury, maximum gauge 9m, water content 60%, selects powder
Mixing pile carries out basement process.Lime mixing pile stake diameter is 0.6m, and design spacing is 1.3m, equilateral triangle arrangement, the long 10m of stake；
Every linear meter(lin.m.) lime straying quatity is 52kg, and reinforcing scope is 0.6 times of enlarging width of subgrade.It is filled out according to geologic prospect situation and top
Soil self weight can determine the settlement after construction feasible value of ground, and new roadbed fills in branch.In order to further strengthen the combination of new and old roadbed
Intensity reduces the relative settlement of new and old roadbed, and high-strength earth work grille is arranged in internal embankment and old road base binding site.Through existing
The subsidence curve of test shows that the settlement of foundation filled with branch's method of filling reduces about 60%, design calculated value and reality
Measured value coincide preferable.Therefore prison carries out roadbed enlarging in such a way that branch fills can greatly reduce the uneven heavy of new and old roadbed
Drop avoids road disease caused by extending because of roadbed.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. branch's dam filling construction of Expressway Widening roadbed, which comprises the following steps:
Step 1 carries out basement process to the soil body a certain range of on the outside of the base of old road；
Step 2 fills external embankment, the outer edge of the external embankment and bottom on the soil body for completed basement process
It is overlapped respectively with the side slope of newly-built embankment and substrate；
Step 3 fills internal embankment, forms new and old roadbed whole when the settlement after construction on external roadbed top meets feasible value
Body；
Step 4 fills new roadbed when the settlement after construction of entire embankment meets feasible value；
The external roadbed inward flange is not contacted with old road base.
2. branch's dam filling construction of Expressway Widening roadbed as described in claim 1, which is characterized in that ground in step 1
The method of processing is: using the serial or parallel connection built pile of permeable concrete pile, broken stone pile, permeable concrete pile and broken stone pile,
Cement mixing method or CFG handle ground.
3. branch's dam filling construction of Expressway Widening roadbed as claimed in claim 2, which is characterized in that basement process range
For the width of 0.3~0.8 times of new roadbed bottom.
4. branch's dam filling construction of Expressway Widening roadbed as claimed in claim 2, which is characterized in that reinforcing soil pile it is straight
Diameter and setting depth, spacing should be determining through Stability Checking Calculation and should meet the requirement of settlement after construction.
5. branch's dam filling construction of Expressway Widening roadbed as described in claim 1, which is characterized in that the external road
The section configuration of dike be similar to it is trapezoidal, outer edge and bottom are overlapped with the side slope of newly-built embankment and substrate respectively, embankment it is interior
Edge is the slope that the gradient is 1:1.5~1:1, contacts external roadbed inward flange with old road base, newly fills out roadbed to reduce
Settle the influence to old road base.
6. branch's dam filling construction of Expressway Widening roadbed as described in claim 1, which is characterized in that the inside road
The shape of base is similar to up-side down triangle.
7. branch's dam filling construction of Expressway Widening roadbed as claimed in claim 6, which is characterized in that the inside road
The highest face of base and the highest face of external roadbed are in the same plane.
8. branch's dam filling construction of Expressway Widening roadbed as described in claim 1, which is characterized in that base area base matter
Situation, which is asked, calculates ground settlement after construction feasible value, and can calculate settlement after construction using settlement observation curve.
9. branch's dam filling construction of Expressway Widening roadbed as described in claim 1, which is characterized in that the new road construction
Dike filling height is the sum of embankment oneself height and Embankment Subsidence value.
10. branch's dam filling construction of Expressway Widening roadbed as described in claim 1, which is characterized in that the new road
Bed fill using placement in layers mode carry out it is whole fill, should carry out settling and stablizing observation during placement in layers, and stringent
Fill core concrete is controlled, in order to avoid too fast cause foundation failure due to filling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711038298.5A CN107815937B (en) | 2017-10-30 | 2017-10-30 | Branch's dam filling construction of Expressway Widening roadbed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711038298.5A CN107815937B (en) | 2017-10-30 | 2017-10-30 | Branch's dam filling construction of Expressway Widening roadbed |
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| CN107815937B true CN107815937B (en) | 2019-10-18 |
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| CN110725163B (en) * | 2019-10-24 | 2021-09-14 | 中铁十局集团第八工程有限公司 | Composite roadbed device based on existing rail transit roadbed and pile construction method |
| CN111021171A (en) * | 2019-12-17 | 2020-04-17 | 中交路桥建设有限公司 | Method for widening soft soil roadbed in frozen soil area |
| CN113914162B (en) * | 2021-09-17 | 2023-02-28 | 山东高速工程建设集团有限公司 | Rapid construction method for partial filling of widened roadbed of highway |
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| FR2890399B1 (en) * | 2005-09-05 | 2009-02-06 | Ims Rn Ingenierie Des Mouvemen | STRUCTURE ENLARGING A ROAD |
| US8376661B2 (en) * | 2010-05-21 | 2013-02-19 | R&B Leasing, Llc | System and method for increasing roadway width incorporating a reverse oriented retaining wall and soil nail supports |
| CN202509521U (en) * | 2012-04-19 | 2012-10-31 | 机械工业第三设计研究院 | Roadbed side slope retaining protection structure |
| CN205501749U (en) * | 2016-03-28 | 2016-08-24 | 重庆建工市政交通工程有限责任公司 | Structure is widened to highway subgrade |
| CN105862533B (en) * | 2016-03-30 | 2017-12-22 | 驻马店市公路工程开发有限公司 | A kind of construction method of highway broadening roadbed |
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