CN102979031A - Method and structure used for handling highway bridgehead bumping problem - Google Patents
Method and structure used for handling highway bridgehead bumping problem Download PDFInfo
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- CN102979031A CN102979031A CN2011102624985A CN201110262498A CN102979031A CN 102979031 A CN102979031 A CN 102979031A CN 2011102624985 A CN2011102624985 A CN 2011102624985A CN 201110262498 A CN201110262498 A CN 201110262498A CN 102979031 A CN102979031 A CN 102979031A
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Abstract
The invention provides a method and a structure used for handling a highway bridgehead bumping problem. According to the invention, based on road load and foundation conditions, a pile group variable-stiffness program satisfying bridgehead subsidence control requirements is designed. A foundation reinforcement treatment is carried out by using common bored piles, such that bearing capacity of shallow foundation is improved, and subsidence is reduced. Enlargement heads are provided on group pile, and the numbers of the enlargement heads are gradually reduced, such that group pile base heterogeneous distribution is realized, and group pile foundation stiffness smooth variation is formed. Compared with prior arts, with the method and the structure provided by the invention, the bridgehead bumping problem is effectively solved. Construction facility and construction process are simple. Construction cost is low. The requirement for group pile foundation pile strength is relatively low.
Description
Technical field
The present invention relates to the processing method of vehicle jumping at bridge head of highway and process structure, belong to control vehicle jumping at bridge head of highway field.
Background technology
Along with the construction development of China's speedway, bumping at bridge-head shortens the application life of the vehicles, affects traffic safety, and bumping at bridge-head has become an internationally recognized traffic technique difficult problem.Generally, sedimentation does not occur in the abutment ground, therefore bumping at bridge-head mainly is because uneven settlement of foundation causes the highway end of the bridge faulting of slab ends to occur, can the road pavement structure cause harmful effect and even destruction, the not high and unreal vehicle bump at bridge ends generation that also can cause of banketing of the resistance to shock of in addition foundation stiffness sudden change, the speed of a motor vehicle and vehicle itself.The basic reason that wherein causes bumping at bridge-head be flexible pavement from rigid structure between the junction because of the different generation differential settlements of rigidity, produce faulting of slab ends between ground and the abutment, thereby its rigidity can smooth-going transition on anti-VERTICAL DEFORMATION to make two docking different in kind pavement system, is the key of resolving bumping at bridge-head.The method of the multiple solution bumping at bridge-head that present domestic highway division and R﹠D institution adopt is processed soft foundation, and now domestic have: the common methods such as cushion, surcharge preloading, plastic draining board, DJM pile compound foundation.
The tradition Soft Soil Subgrade Treatment Method can't effectively be set up abutment to the smooth-going transition of the rigidity of roadbed, and the stiffness variation measure is few.A kind of vehicle jumping at bridge head of highway processing method by the rigid composite foundation change foundation stiffness that formed by long stake and stub alternative arrangement progressively was applied in the construction of speedway in recent years, this processing method has solved ground and the smooth-going excessive problem of Abutment stiffness, but the length stake requirement of strength of using in this processing method is higher, construction installation and work progress are comparatively complicated, construction cost is relatively high.
So, be necessary to above-mentioned vehicle jumping at bridge head of highway processing method have that length stake requirement of strength is higher, construction installation and work progress is comparatively complicated, construction cost is relatively high etc. that problem is further improved, to avoid the problems referred to above.
Summary of the invention
The present invention proposes for solving the above-mentioned problems in the prior art, its purpose is to provide a kind of and had both effectively solved problem of bumping at bridge-head, and construction installation is simple with work progress, construction cost is low, to the processing method of the relative low vehicle jumping at bridge head of highway of the stake requirement of strength of Group Pile Foundation and process structure.
The processing method of the vehicle jumping at bridge head of highway that the present invention relates to, it may further comprise the steps: (1) arranges the transition ground between rigidity abutment and flexible roadbed; (2) behind the pouring pile hole, cavity at clump of piles pile body adopts mechanical rotary-cut, mode squeezed and that ram to form enlarged footing, then concrete perfusion, filled foundation, finish the Group Pile Foundation that has changed rigidity, wherein, described Group Pile Foundation begins to point to the other end from the end near described abutment, and the described enlarged footing quantity on the clump of piles reduces gradually; (3) in abutment construction piling technique and fill abutment, finish Pile Foundation ' on Abutment; (4) filling roadbed; And (5) are filled out and are paved.
In addition, the processing structure of a kind of vehicle jumping at bridge head of highway that the present invention relates to comprises Pile Foundation ' on Abutment, road surface, roadbed and Group Pile Foundation, and Group Pile Foundation is positioned at below the roadbed, wherein, is provided with enlarged footing on the clump of piles of described Group Pile Foundation; Described Group Pile Foundation begins to point to the other end from the end near described abutment, and the enlarged footing quantity on the clump of piles reduces gradually.
In addition, preferably, the clump of piles in the described Group Pile Foundation that changes rigidity is bored pile; Stake in the described Pile Foundation ' on Abutment is preformed pile or castinplace pile.
In addition, preferably, according to the stiffness variation requirement of ground, position and the quantity of described enlarged footing are variable.
In addition, preferably, the distance between any two the described enlarged footings on every pile is that 2 times of major diameter enlarged footing in these two enlarged footings are more than the diameter.
Moreover preferably, in described Group Pile Foundation, the distance between any two piles is that 3 times of large diameter pile in this two pile are more than the diameter.
As mentioned above, processing method according to vehicle jumping at bridge head of highway of the present invention, wherein be provided with enlarged footing on the clump of piles of Group Pile Foundation, Group Pile Foundation begins to point to the other end from the end near abutment, enlarged footing quantity on the clump of piles reduces gradually, stake and the common load effect of native closely knit combination with expanded hole, the rigidity that so namely realizes clump of piles pile foundation and Pile Foundation ' on Abutment is smooth-going excessively, has also solved existing vehicle jumping at bridge head of highway treatment system when having solved problem of bumping at bridge-head and has existed length stake requirement of strength higher, construction installation and work progress are comparatively complicated, the problems such as construction cost is relatively high.
Description of drawings
By below in conjunction with accompanying drawing embodiment being described, above-mentioned feature of the present invention and technological merit will become apparent and understand easily.
Fig. 1 is the flow chart of the processing method of vehicle jumping at bridge head of highway;
Fig. 2 is the schematic diagram of the processing structure of expression vehicle jumping at bridge head of highway.
Description of reference numerals
1, Pile Foundation ' on Abutment;
2, road surface;
3, general subgrade;
4, enlarged footing;
5, Group Pile Foundation.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done further detailed description.
In the following description, only the mode by explanation is described some example embodiment of the present invention, undoubtedly, those of ordinary skill in the art can recognize, in situation without departing from the spirit and scope of the present invention, can revise described embodiment with various different modes.Therefore, accompanying drawing and be described in just illustratively in essence rather than is used for the protection domain of restriction claim.In addition, in this manual, identical Reference numeral indicates identical part.
Fig. 1 is the flow chart of the processing method of vehicle jumping at bridge head of highway.As shown in Figure 1, at step S110, according to road surface load and foundation condition, at first design a clump of piles that meets the end of the bridge requirement of settlement control and become the rigidity scheme, then a transitional region is set between rigidity abutment and flexible roadbed 3, be used for realizing between rigidity abutment and the flexible roadbed 3 submissive excessively.
At step S120, adopt drilling pouring pile hole, clear up smooth construction plant, determine the particular location of stake according to scheme, guarantee that distance between any two piles is three times of large diameter pile in this two pile more than the diameter, buries underground and protects a barrel spud pile hole site, slurrying pore-forming.Behind pouring pile hole, sediment in the cleaning eye, cavity at clump of piles pile body adopts mechanical rotary-cut, mode squeezed and that ram to form enlarged footing 4, Group Pile Foundation 5 begins to point to the other end from the end near described abutment, enlarged footing 4 quantity on the clump of piles reduce gradually, and guarantee the distance between any two enlarged footings 4 on every pile, be more than the double diameter of the major diameter enlarged footing 4 in these two enlarged footings 4.Then transfer reinforcing cage, the fluid concrete pile, enlarged footing 4 surrounding soils and enlarged footing 4 and pile body are closely as one, the effectively common load effect of performance stake soil, then with aggregate chips bed course, sand cushion, mixing dirt filled foundation and compacting, namely finish the Group Pile Foundation 5 that has changed rigidity.Become in addition the difference of rigidity scheme according to a clump of piles, can change position and the quantity of enlarged footing 4.
Then, step S130 at rigidity abutment construction drill castinplace pile, tube-sinking cast-in-situ pile or preformed pile, fills abutment and compacting with aggregate chips bed course, sand cushion, mixing dirt filled foundation and compacting, namely finishes Pile Foundation ' on Abutment 1.
Afterwards, step S140 is with soil or building stones constructing roadbed 3.
At last, step S150 fills out the 2 also compactings that pave with materials such as bituminous concrete, cement concretes.
Fig. 2 is the schematic diagram of the processing structure of expression vehicle jumping at bridge head of highway.As shown in Figure 2, the processing structure of vehicle jumping at bridge head of highway comprises that employing preformed pile or castinplace pile are Pile Foundation ' on Abutment 1, road surface 2, the roadbed 3 of pile foundation and adopt bored pile to change the Group Pile Foundation 4 of STIFFNESS BOTH THE BASE, and Group Pile Foundation 4 is positioned at below the roadbed 2.Be provided with the enlarged footing 4 that forms by mechanical rotary-cut, mode squeezed and that ram on the clump of piles, Group Pile Foundation 5 begins to point to the other end from the end near abutment, and enlarged footing 4 quantity on the clump of piles reduce gradually.Distance on every pile between any two enlarged footings 4, more than the double diameter of the major diameter enlarged footing 4 in these two enlarged footings 4, and according to the difference of the stiffness variation scheme of ground, can realize by changing enlarged footing 4 position changeables and quantity the change of Group Pile Foundation rigidity.
Need to prove that in addition in Group Pile Foundation 5, the distance between any two piles is that 3 times of large diameter pile in this two pile are more than the diameter.
Enlarged footing 4 can take full advantage of the up and down hardpan at each position of pile body, and begin to point to the other end by Group Pile Foundation 5 from the end near abutment, the mode that enlarged footing 4 quantity on the clump of piles reduce gradually changes the common force-mechanism that waits bored pile, increased native end load, improved the ability of resistance to compression, resistance to plucking, stake soil rigidity is improved jointly, thereby greatly reduced basic break and settlement after construction.The damping action of enlarged footing 4 can effectively be controlled the vibration that ground bankets under the dynamic loading, reduces simultaneously to banket to the subsidiary stress of foundation soil with stake, and foundation settlement is little, stable period is short.
The invention is further illustrated by the following examples.
Embodiment, 70 meters of the excessive segment lengths of certain grade separation end of the bridge, about 3 meters of ground levels, 2～4 meters of the depths of fill have 11～12 meters thick clays under the ground.
End of the bridge process range length is 60m, become the rigidity Group Pile Foundation and be positioned at the end of the bridge process range, point to roadbed from abutment, Group Pile Foundation is divided into 4 zones by 15 meters intervals, long 20 meters of its king-pile, 0.7 meter in stake footpath, 1.6 meters of enlarged footing diameters, the quantity of 4 regional single pile enlarged footings is followed successively by 4,3,2,1 and successively decreases.
Under above-mentioned instruction of the present invention; those skilled in the art can carry out the present invention is improved on the basis of above-described embodiment; and these improvement; all drop in the protection domain of invention; those skilled in the art should be understood that; above-mentioned specific descriptions are just explained purpose of the present invention better, and protection scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. the processing method of a vehicle jumping at bridge head of highway is characterized in that, may further comprise the steps:
(1) between rigidity abutment and flexible roadbed, the transition ground is set;
(2) behind the pouring pile hole, cavity at clump of piles pile body adopts mechanical rotary-cut, mode squeezed and that ram to form enlarged footing, then concrete perfusion, filled foundation, finish the Group Pile Foundation that has changed rigidity, wherein, described Group Pile Foundation begins to point to the other end from the end near described abutment, and the described enlarged footing quantity on the clump of piles reduces gradually;
(3) in abutment construction piling technique and fill abutment, finish Pile Foundation ' on Abutment;
(4) filling roadbed; And
(5) fill out and pave.
2. according to the processing method of vehicle jumping at bridge head of highway claimed in claim 1, it is characterized in that:
Clump of piles in the described Group Pile Foundation that changes rigidity is bored pile;
Stake in the described Pile Foundation ' on Abutment is preformed pile or castinplace pile.
3. according to the processing method of vehicle jumping at bridge head of highway claimed in claim 1, it is characterized in that:
According to the stiffness variation requirement of ground, position and the quantity of described enlarged footing are variable.
4. according to the processing method of vehicle jumping at bridge head of highway claimed in claim 3, it is characterized in that:
Distance between any two described enlarged footings on every pile is that 2 times of major diameter enlarged footing in these two enlarged footings are more than the diameter.
5. according to the processing method of vehicle jumping at bridge head of highway claimed in claim 1, it is characterized in that:
In described Group Pile Foundation, the distance between any two piles is that 3 times of large diameter pile in this two pile are more than the diameter.
6. the processing structure of a vehicle jumping at bridge head of highway comprises Pile Foundation ' on Abutment, road surface, roadbed and Group Pile Foundation, and Group Pile Foundation is positioned at below the roadbed, it is characterized in that:
Be provided with enlarged footing on the clump of piles of described Group Pile Foundation;
Described Group Pile Foundation begins to point to the other end from the end near described abutment, and the enlarged footing quantity on the clump of piles reduces gradually.
7. according to the processing structure of vehicle jumping at bridge head of highway claimed in claim 6, it is characterized in that:
Clump of piles in the described Group Pile Foundation that changes rigidity is bored pile;
Stake in the described Pile Foundation ' on Abutment is preformed pile or castinplace pile.
8. according to the processing structure of vehicle jumping at bridge head of highway claimed in claim 6, it is characterized in that:
According to the stiffness variation requirement of ground, position and the quantity of described enlarged footing are variable.
9. according to the processing structure of vehicle jumping at bridge head of highway claimed in claim 7, it is characterized in that:
Distance between any two described enlarged footings on every pile is that 2 times of major diameter enlarged footing in these two enlarged footings are more than the diameter.
10. according to the processing structure of vehicle jumping at bridge head of highway claimed in claim 6, it is characterized in that:
In described Group Pile Foundation, the distance between any two piles is that 3 times of large diameter pile in this two pile are more than the diameter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110262498.5A CN102979031B (en) | 2011-09-06 | 2011-09-06 | A kind of processing method of vehicle jumping at bridge head of highway and process structure |
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| CN201110262498.5A CN102979031B (en) | 2011-09-06 | 2011-09-06 | A kind of processing method of vehicle jumping at bridge head of highway and process structure |
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| CN102979031A true CN102979031A (en) | 2013-03-20 |
| CN102979031B CN102979031B (en) | 2015-09-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179105A (en) * | 2014-08-27 | 2014-12-03 | 中国地质大学（武汉） | Top-down rigid pile compound foundation construction method |
| CN109763390A (en) * | 2019-01-18 | 2019-05-17 | 广西交通设计集团有限公司 | A kind of reinforced rigid pile composite foundation structure |
| CN113512945A (en) * | 2021-04-20 | 2021-10-19 | 中交第三公路工程局有限公司 | Variable-rigidity splicing device and method for road bridge and road tunnel connecting sections |
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| JPH10121491A (en) * | 1996-10-23 | 1998-05-12 | Fujita Corp | Assembly engineering method for foundation beam reinforcement |
| CN1298991A (en) * | 2001-01-18 | 2001-06-13 | 北京市机械施工公司 | Pile forming method by drilling, enlarging, pressure-grouting and filling |
| KR100926300B1 (en) * | 2009-03-10 | 2009-11-12 | 주식회사 반석티비에스 | Foundation structure reinfoeced by pile and the construction method for the same |
| CN102051861A (en) * | 2009-11-02 | 2011-05-11 | 郑州优特基础工程维修有限公司 | Bridgehead vehicle bump prevention and control high polymer grouting technique and construction method thereof |
| CN201850505U (en) * | 2010-11-18 | 2011-06-01 | 中交第一公路勘察设计研究院有限公司 | Rigid-flexible transition structure capable of preventing bumping at bridge-head |
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| JPH10121491A (en) * | 1996-10-23 | 1998-05-12 | Fujita Corp | Assembly engineering method for foundation beam reinforcement |
| CN1298991A (en) * | 2001-01-18 | 2001-06-13 | 北京市机械施工公司 | Pile forming method by drilling, enlarging, pressure-grouting and filling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179105A (en) * | 2014-08-27 | 2014-12-03 | 中国地质大学（武汉） | Top-down rigid pile compound foundation construction method |
| CN104179105B (en) * | 2014-08-27 | 2017-06-13 | 中国地质大学（武汉） | A kind of contrary sequence method rigid pile composite foundation construction method |
| CN109763390A (en) * | 2019-01-18 | 2019-05-17 | 广西交通设计集团有限公司 | A kind of reinforced rigid pile composite foundation structure |
| CN113512945A (en) * | 2021-04-20 | 2021-10-19 | 中交第三公路工程局有限公司 | Variable-rigidity splicing device and method for road bridge and road tunnel connecting sections |
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| CN102979031B (en) | 2015-09-09 |
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Address after: 100085, Beijing, Beijing economic and Technological Development Zone, Kangding street, No. 1, 2, six or seven, Daxing District Patentee after: MCC COMMUNICATION CONSTRUCTION GROUP CO., LTD. Address before: 100176, Daxing District economic and Technological Development Zone, Kangding street, No. 1, 2, six, seven, Patentee before: MCC Communication Engineering Technology Co., Ltd. |