CN101591880A - The variable rigidity treatment system of vehicle jumping at bridge head of highway - Google Patents
The variable rigidity treatment system of vehicle jumping at bridge head of highway Download PDFInfo
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- CN101591880A CN101591880A CNA2009100537909A CN200910053790A CN101591880A CN 101591880 A CN101591880 A CN 101591880A CN A2009100537909 A CNA2009100537909 A CN A2009100537909A CN 200910053790 A CN200910053790 A CN 200910053790A CN 101591880 A CN101591880 A CN 101591880A
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Abstract
The invention belongs to particularly expressway construction field of traffic engineering, be specifically related to a kind of change rigidity ground treatment system of vehicle jumping at bridge head of highway.According to handling the different of object and, adopting pile foundation, length combination rigid pile composite foundation and long slab stub combined stack-load foundation treatment mode to carry out ground stabilization respectively to the settlement Control standard.For abutment foundation, suitably reduce the vertical rigidity of its pile foundation, with the settlement Control of bridge itself in the scope of its permission; Then adopt length combination rigid pile composite foundation treatment technology for the end of the bridge roadbed, according to concrete engine request and geological conditions, rigid pile can be selected Low Intensity Concrete Piles, CFG stake or pile for prestressed pipe etc.; After leaving the abutment certain distance, then can adopt long slab stub combined stack-load foundation treatment mode to carry out ground stabilization, utilize stub (cement earth pile or low-intensity stake) to improve the bearing capacity and the reduction settling amount of superficial part ground, and accelerate a discharging consolidation process of the following weak soil in the end by plastic draining board associating top preloading system, shorten the construction period thereby reach, reduce the purpose of settlement after construction or relative settlement.
Description
Technical field
The invention belongs to particularly expressway construction field of traffic engineering, be specifically related to a kind of change rigidity ground treatment system of vehicle jumping at bridge head of highway.
Background technology
Bumping at bridge-head often causes the highway communication transportation function to be met, bring out, increase the weight of bridge defect, shorten vehicles application life, and influence traffic safety, the vehicle jumping at bridge head of highway problem has become internationally recognized highway communication technical barrier for a long time.It is generally acknowledged that sedimentation does not take place abutment substantially, bumping at bridge-head produces mainly because the end of the bridge platform back of the body bankets and ground takes place to cause than big sedimentation under natural environment and load action.The method of the multiple solution bumping at bridge-head that present domestic highway division and R﹠D institution adopt is handled soft foundation, and present domestic common method has: cushion, surcharge preloading method, mixing pile composite foundation method etc.See that with regard to present circumstances cement mixing pile composite foundation reinforcing soft soil effect is obvious, the construction period is short, but expense is higher relatively and construction quality is difficult to control, and the degree of depth of its processing simultaneously is limited (generally 10～15m).At Yangtze River Delta and Delta of the Pearl River area and the deep soft soil layer of other region following the line of the sea extensive development of China, owing to embankment height, load are big, the consolidation process of these deep soft soil foundations is the technological difficulties in the present soft clay area expressway construction.
Based on the reason of bumping at bridge-head generation and the deficiency of existing punishment method existence, the present invention proposes the characteristics of the means of handling in conjunction with multiple ground, adopt change rigidity method for processing foundation to control a kind of new technology of bumping at bridge-head according to road surface load and foundation condition.For abutment foundation, suitably reduce the vertical rigidity of its pile foundation, with the settlement Control of bridge itself in the scope of its permission; Then adopt length combination rigid pile composite foundation treatment technology for the end of the bridge roadbed, according to concrete engine request and geological conditions, rigid pile can be selected Low Intensity Concrete Piles, CFG stake or pile for prestressed pipe etc.; After leaving the abutment certain distance, then can adopt long slab stub combined stack-load foundation treatment mode to carry out ground stabilization, utilize stub (cement mixing pile or other low-intensity stake) to improve the bearing capacity and the reduction settling amount of superficial part ground, and unite the discharging consolidation process that preloading method in top is accelerated the deep layer weak soil by long plastic draining board, shorten the construction period thereby reach, reduce the purpose of settlement after construction or relative settlement.
The characteristics of comprehensive above-mentioned several ground processing form, foundation soil character according to abutment, section end of the bridge section and general highway section, consider the transition and linkage between each section, adopting the mode that becomes rigidity to carry out ground handles, can reach the purpose that obviously alleviates or eliminate bumping at bridge-head, thereby improve the comfortableness of vehicle ', and reduce phenomenons such as the driving that causes because of the end of the bridge maintenance is not smooth, obstruction, traffic accident, not only have remarkable advantages on the economic and technical norms, and social benefit is also very obvious.
Summary of the invention
The object of the present invention is to provide a kind of change rigidity ground treatment system of vehicle jumping at bridge head of highway.
The present invention is according to handling the different of object and to the settlement Control standard, adopting pile foundation, length combination rigid pile composite foundation and long slab stub combined stack-load foundation treatment mode to carry out ground stabilization respectively.Its key problem in technology is how according to road surface load and foundation condition, designs the change rigidity Ground Treatment Schemes that meets the bumping at bridge-head requirement of settlement control.
The variable rigidity treatment system of the vehicle jumping at bridge head of highway that the present invention proposes comprises abutment pile foundation 1, rigid pile composite foundation 2, long slab long-short pile composite foundation 3 and general subgrade 4.Its structure such as Fig. 1, Fig. 2 and shown in Figure 3.Wherein, rigid pile composite foundation 2 is between abutment pile foundation 1 and long slab long-short pile composite foundation 3, and general subgrade 4 is positioned at long slab long-short pile composite foundation 3 opposite sides; Rigid pile composite foundation 2 is alternately arranged by long stake 9 and stub A10 and is formed, long slab long-short pile composite foundation 3 is alternately arranged by plastic draining board 11 and stub B12 and is formed, rigid pile composite foundation 2 and long slab long-short pile composite foundation 3 tops are provided with grid 8, grid 8 tops are roadbed materials 7, and roadbed material 7 tops are road surfaces 6.
Among the present invention, described long stake 9 is a rigid pile, and rigid pile adopts Low Intensity Concrete Piles, CFG stake or pile for prestressed pipe.
Among the present invention, described stub A10 is an agitation pile.
Among the present invention, described plastics platoon leader plate 11 inserts long slab long-short pile composite foundation 3 degree of depth and long stake 9 same length.
Among the present invention, center distance is 2～3.5 double-length stakes, 9 diameters between adjacent long stake 9 and the stub A10.
Among the present invention, center distance is 2～5 times of stub B12 diameters between adjacent plastic draining board 11 and the stub B12.
Among the present invention, grid 8 is mixed with geotextile by lime repacking soil.
Among the present invention, abutment pile foundation 1 can suitably reduce the vertical rigidity of its pile foundation, with the settlement Control of bridge itself in the scope of its permission; Length combination rigid pile composite foundation 2 can be according to engine request and geological conditions, and rigid pile can be selected Low Intensity Concrete Piles, CFG stake or pile for prestressed pipe etc., and this section is for connecting the processing section of abutment and end of the bridge roadbed; In distance far away slightly then is long slab long-short pile composite foundation 3, and this part is the linkage section that progressively carries out the transition to general subgrade 4.
Roadbed filling 7 and improve 8 of grids that soil+geotechnique forms by lime and determine that according to requirement of engineering long 9 is rigid pile among the present invention, stub A10 is an agitation pile, the plastic draining board degree of depth and length equate; The present invention is long pile length for the processing degree of depth of roadbed.Whole design is divided into three parts, by different method for processing foundation, arrive the smooth transition of general subgrade in the hope of obtaining from the abutment pile foundation again to the end of the bridge process range, makes sedimentation meet control criterion, the solution problem of bumping at bridge-head.
Beneficial effect of the present invention:
Through the inquiry patent database, do not find similar patent report at present as yet.Literature search is found, existing Highway Foundation treatment system normally adopts same ground treatment system, the existing common issue with of these systems is that the processing means are single, treatment effect for bumping at bridge-head is limited, and design and construction relative complex, practical engineering application has significant limitation.The present invention has then broken through the limitation of existing bumping at bridge-head processing method, adopts the comprehensive regulation of multiple ground treatment system, can effectively solve problem of bumping at bridge-head.
Description of drawings
Fig. 1 is a plan view of the present invention.
Fig. 2 is a longitudinal plan of the present invention.
Fig. 3 is an A-A sectional drawing of the present invention.
Fig. 4 is a B-B sectional drawing of the present invention.
Fig. 5 is a C-C sectional drawing of the present invention.
Number in the figure: 1 is the abutment pile foundation; 2 is rigid pile composite foundation; 3 is the long slab long-short pile composite foundation; 4 is general subgrade; 5 end of the bridge process range; 6 is the road surface; 7 is roadbed filling; 8 is grid; 9 are long stake; 10 is stub A; 11 plastic draining boards, 12 is stub B.
The specific embodiment
The invention is further illustrated by the following examples.
End of the bridge process range 5 length are 50m, and wherein rigid pile composite foundation 2 process range are 30m, and long slab long-short pile composite foundation 3 process range are 20m.Long stake 9 is a rigid pile, and stake is long to be 20m, and the stake footpath is 0.7m, spacing 1.9m; Stub A10 is an agitation pile, and stake is long to be 16m, and the stake footpath is 0.7m, spacing 1.9m, and length stake triangularity lays out pile; In the long slab long-short pile composite foundation 3, plastic draining board 11 length are 20.5m, and stub B12 stake is long to be 10m, modulus of compressibility 100MPa, and it is 20m that plastic draining board 11 inserts the ground degree of depth, the length of basseting 0.5m.
In abutment process range 5, adopt to become rigidity ground treatment system the short combination of the end of the bridge segment length rigid pile composite foundation 2 that adopts the present invention to handle, final settlement 223mm, settlement after construction 25mm＜100mm; For long slab long-short pile composite foundation 3, final settlement 385mm, settlement after construction 79mm＜100mm.For abutment pile foundation 1, suitably reduce the vertical rigidity of its pile foundation, with the settlement Control of bridge itself in the scope of its permission.According to technical requirements, bearing capacity of foundation soil＞=120Kpa, settlement after construction＜=100mm.Comparison between calculation results, the change rigidity foundation treatment technology that the present invention adopts satisfies requirement of engineering and technical requirements.
For this type of problem, according to the arrangement of Fig. 1～Fig. 5, adopt the ground treatment system that becomes rigidity, determine the long and modulus of good stake according to the actual conditions and the geological conditions of engineering simultaneously, can reach satisfied effect.The present invention provides new practical approach for handling problem of bumping at bridge-head, and good economic benefits is arranged.
Claims (7)
1, a kind of variable rigidity treatment system of vehicle jumping at bridge head of highway, comprise abutment pile foundation (1), rigid pile composite foundation (2), long slab long-short pile composite foundation (3) and general subgrade (4), it is characterized in that rigid pile composite foundation (2) is positioned between abutment pile foundation (1) and the long slab long-short pile composite foundation (3), general subgrade (4) is positioned at long slab long-short pile composite foundation (3) opposite side; Rigid pile composite foundation (2) is alternately arranged by long stake (9) and stub A (10) and is formed, long slab long-short pile composite foundation (3) is alternately arranged by plastic draining board (11) and stub B (12) and is formed, rigid pile composite foundation (2) and long slab long-short pile composite foundation (3) top are provided with grid (8), grid (8) top is roadbed material (7), and roadbed material (7) top is road surface (6).
2, the variable rigidity treatment system of vehicle jumping at bridge head of highway according to claim 1 is characterized in that described long stake (9) is rigid pile, and rigid pile adopts Low Intensity Concrete Piles, CFG stake or pile for prestressed pipe.
3, the variable rigidity treatment system of vehicle jumping at bridge head of highway according to claim 1 is characterized in that described stub A (10) is an agitation pile.
4, the variable rigidity treatment system of vehicle jumping at bridge head of highway according to claim 1 is characterized in that described plastics platoon leader plate (11) inserts long slab long-short pile composite foundation (3) degree of depth and long stake (9) same length.
5, the variable rigidity treatment system of vehicle jumping at bridge head of highway according to claim 1 is characterized in that center distance is 2～3.5 double-length stake (9) diameters between adjacent long stake (9) and the stub A (10).
6, the variable rigidity treatment system of vehicle jumping at bridge head of highway according to claim 1 is characterized in that center distance is 2～5 times of stub B (12) diameters between adjacent plastic draining board (11) and the stub B (12).
7, the variable rigidity treatment system of vehicle jumping at bridge head of highway according to claim 1 is characterized in that grid (8) is mixed with geotextile by lime repacking soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100537909A CN101591880B (en) | 2009-06-25 | 2009-06-25 | Variable rigidity treatment system for vehicle jumping at bridge head of highway |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100537909A CN101591880B (en) | 2009-06-25 | 2009-06-25 | Variable rigidity treatment system for vehicle jumping at bridge head of highway |
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| Publication Number | Publication Date |
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| CN101591880A true CN101591880A (en) | 2009-12-02 |
| CN101591880B CN101591880B (en) | 2011-05-25 |
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| CN2009100537909A Expired - Fee Related CN101591880B (en) | 2009-06-25 | 2009-06-25 | Variable rigidity treatment system for vehicle jumping at bridge head of highway |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912808A (en) * | 2012-11-06 | 2013-02-06 | 山东兴华建设集团有限公司 | Spiral CFG pile and cement stirring pile combined composite foundation construction method |
| CN102979020A (en) * | 2011-09-06 | 2013-03-20 | 中冶交通工程技术有限公司 | Method and structure used for handling highway bridgehead bumping problem |
| CN103114521A (en) * | 2013-01-21 | 2013-05-22 | 浙江大学宁波理工学院 | Structure and construction method of junction position of bridge abutment and roadbed |
| CN105350418A (en) * | 2015-12-04 | 2016-02-24 | 中国铁道科学研究院铁道建筑研究所 | Subgrade strengthening method |
| CN105926421A (en) * | 2016-05-12 | 2016-09-07 | 姜正晖 | Bridgehead car jump restoration and precaution method based on load reduction |
| CN110952389A (en) * | 2019-12-17 | 2020-04-03 | 同济大学 | Pile combined structure construction method for controlling uneven settlement of transition section of high-speed railway bridge |
| CN112779853A (en) * | 2019-11-07 | 2021-05-11 | 中冶京诚工程技术有限公司 | Abutment and design and construction method thereof |
| CN113882353A (en) * | 2021-11-01 | 2022-01-04 | 中国建筑第二工程局有限公司 | Multi-pile type conversion disposal structure under complex geology of extreme racetrack and construction method thereof |
| CN114575209A (en) * | 2022-03-31 | 2022-06-03 | 浙江数智交院科技股份有限公司 | Road rigid pile and preloading soft foundation treatment transition structure and construction method |
-
2009
- 2009-06-25 CN CN2009100537909A patent/CN101591880B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979020A (en) * | 2011-09-06 | 2013-03-20 | 中冶交通工程技术有限公司 | Method and structure used for handling highway bridgehead bumping problem |
| CN102912808A (en) * | 2012-11-06 | 2013-02-06 | 山东兴华建设集团有限公司 | Spiral CFG pile and cement stirring pile combined composite foundation construction method |
| CN103114521A (en) * | 2013-01-21 | 2013-05-22 | 浙江大学宁波理工学院 | Structure and construction method of junction position of bridge abutment and roadbed |
| CN103114521B (en) * | 2013-01-21 | 2015-02-11 | 浙江大学宁波理工学院 | Structure and construction method of junction position of bridge abutment and roadbed |
| CN105350418A (en) * | 2015-12-04 | 2016-02-24 | 中国铁道科学研究院铁道建筑研究所 | Subgrade strengthening method |
| CN105926421A (en) * | 2016-05-12 | 2016-09-07 | 姜正晖 | Bridgehead car jump restoration and precaution method based on load reduction |
| CN105926421B (en) * | 2016-05-12 | 2018-04-10 | 姜正晖 | A kind of bumping at bridge-head reparation and prevention method based on load decrement |
| CN112779853A (en) * | 2019-11-07 | 2021-05-11 | 中冶京诚工程技术有限公司 | Abutment and design and construction method thereof |
| CN110952389A (en) * | 2019-12-17 | 2020-04-03 | 同济大学 | Pile combined structure construction method for controlling uneven settlement of transition section of high-speed railway bridge |
| CN113882353A (en) * | 2021-11-01 | 2022-01-04 | 中国建筑第二工程局有限公司 | Multi-pile type conversion disposal structure under complex geology of extreme racetrack and construction method thereof |
| CN114575209A (en) * | 2022-03-31 | 2022-06-03 | 浙江数智交院科技股份有限公司 | Road rigid pile and preloading soft foundation treatment transition structure and construction method |
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| CN101591880B (en) | 2011-05-25 |
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