CN104389317A - Ultralarge-sized oblique single-pile foundation structure of large-span arch bridge - Google Patents
Ultralarge-sized oblique single-pile foundation structure of large-span arch bridge Download PDFInfo
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- CN104389317A CN104389317A CN201410620062.2A CN201410620062A CN104389317A CN 104389317 A CN104389317 A CN 104389317A CN 201410620062 A CN201410620062 A CN 201410620062A CN 104389317 A CN104389317 A CN 104389317A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
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- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to an ultralarge-sized oblique single-pile foundation structure of a large-span arch bridge, which solves the construction safety problem of a bridge foundation under unfavorable geographic situation such as bedding or under high environmental protection requirement, reduces the excavation amount of the foundation, alleviates the construction risk, alleviates the affection on the environment and reduces the engineering cost. The ultralarge-sized oblique single-pile foundation structure comprises a pile foundation, wherein the pile foundation is an integral single pile foundation and is directly combined with an arch ring into a whole, and a pile body goes deep into a rock layer along the extension direction of the axis of the arch ring.
Description
Technical field
The present invention relates to bridge, a kind of especially only pile foundation structure of large-span arch bridge ultra-large type tilting being applied to the poor and environmental requirement of geological conditions district higher.
Background technology
As everyone knows, large-span arch bridge, when not arranging self-balancing tie-rod, will produce very large horizontal thrust usually, as long as its basis is not anti-support vertical load, also will resist powerful horizontal thrust.So, there is thrust large-span arch bridge basis usually to adopt Analysis on Large-scale Group Piles Foundation or large-scale Extended chemotherapy.
Analysis on Large-scale Group Piles Foundation is made up of jointly more pile foundation and the cushion cap being connected to stake top.This arch bridge base is by after vertical load, and the interaction due to cushion cap, stake, soil makes the proterties such as its pile side resistance, end resistance, sedimentation change and different from common single pile, and bearing capacity is often not equal to each bearing capacity of single pile sum, and this is called efficiency of pile groups.Meanwhile, owing to not arranging inter-tie, the horizontal thrust that arch springing transmits is resisted from experiencing to cut primarily of pile foundation.Under special circumstances, also horizontal thrust can be resisted by arranging horizontal pile foundation.Because arch bridge level, vertical load are very large, pile foundation quantity is also a lot, therefore dimension of platform general also more common beam bridge pier cap in stake top is large many, and when side slope is comparatively steep or just matter condition is poor, during slope construction, excavated volume is also very large.
Large-scale Extended chemotherapy is load pier (platform) and superstructure transmitted directly is passed to more shallow supporting ground a kind of base form by it, and the general method of open cut foundation that adopts is constructed, therefore is referred to as again Open-cut Foundation or shallow foundation.It is thinner that Extended chemotherapy is generally applicable to covering layer, and the good bridge pier of base bearing capacity (platform), often applies to Bridges in Mountainous Areas basis, particularly large across abut basis.Extended chemotherapy generally adopts stairstepping, and its size comparatively multi-column pier foundation cushion cap wants large, and when side slope is comparatively steep or geology is poor, during slope construction, excavated volume is also very large.
In sum, although Analysis on Large-scale Group Piles Foundation or Extended chemotherapy use very general in arch bridge, also having individual prerequisite, is exactly that before large-scale cushion cap or Extended chemotherapy are constructed, the safety of slope excavation should ensure.General soil, stone class side slope allow ratio of slope excavation according to construction, and its safety all easily meets.If but the situation such as geological condition is poor, side slope is comparatively steep, as smashed to pieces in bedding rock sloper, rock, the excavation difficulty of large-scale cushion cap, Extended chemotherapy is large, risk is high, and engineering measure expense is high, simultaneously also very large to the destruction of environment.
Therefore, for geological conditions, the large-span arch bridge in poor and environmental requirement district higher, creates the innovation that a kind of novel base form will be a kind of property changed, significant.
Summary of the invention
Technical problem to be solved by this invention is the only pile foundation structure of a kind of large-span arch bridge ultra-large type tilting of invention, to solve adverse geological condition or environmental requirement district's bridge foundation construction safety issues higher such as concordant, reduce foundation excavation amount, reduce construction risk, reduce the impact on environment and reduction construction costs.
The technical solution adopted for the present invention to solve the technical problems is as follows:
The only pile foundation structure of large-span arch bridge ultra-large type tilting of the present invention, comprise pile foundation, it is characterized in that: described pile foundation is the only pile foundation of monolithic, direct and arch ring consolidation is integrated, and its pile body gos deep into rock-soil layer along the bearing of trend of arch ring axis.
The invention has the beneficial effects as follows, because pile foundation is direct and arch ring consolidation is integrated, horizontal force and vertical force are born in basis simultaneously, do not need to arrange cushion cap again and carry out internal force conversion, and therefore basic stress is succinct, and abut reaches Internal force of foundation, stress is continuous; During foundation construction, the relative multi-column pier foundation cushion cap of excavated section and Extended chemotherapy are much smaller, and significantly reduce construction risk; Construction method can use for reference method for tunnel construction, and technique is relatively simple.
Accompanying drawing explanation
This manual comprises following five width accompanying drawings:
Fig. 1 is the elevation of the only pile foundation structure of large-span arch bridge ultra-large type tilting of the present invention;
Fig. 2 is the profile of the only pile foundation structure of large-span arch bridge ultra-large type tilting of the present invention;
Fig. 3 is the construction pipe canopy protection figure of the only pile foundation structure of large-span arch bridge ultra-large type tilting of the present invention;
Fig. 4 is the construction profile of the only pile foundation structure of large-span arch bridge ultra-large type tilting of the present invention;
Component shown in figure and corresponding mark: arch ring 10, pile foundation 20, anchor cable 30, pipe canopy 41, anchor pole 42, steel erect support 43, steel arch-shelf 44, steel longeron 45, steel stull 46.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
With reference to Fig. 1,2, the only pile foundation structure of large-span arch bridge ultra-large type tilting of the present invention, comprise pile foundation 20, this pile foundation 20 is the only pile foundation of monolithic, and direct and arch ring 10 consolidation is integrated, and its pile body gos deep into rock-soil layer along the bearing of trend of arch ring 10 axis.Because pile foundation 20 is direct and arch ring 10 consolidation is integrated, horizontal force and vertical force are born in basis simultaneously, do not need to arrange cushion cap again and carry out internal force conversion, and therefore basic stress is succinct, and abut reaches Internal force of foundation, stress is continuous.During foundation construction, the relative multi-column pier foundation cushion cap of excavated section and Extended chemotherapy are much smaller, therefore effectively can reduce construction risk.
With reference to Fig. 2, described pile foundation 20 section configuration is similar to tunnel cross-section, and axially adopt uniform section or variable cross-section shape along pile body, pile body section is solid or hollow.Construction method can use for reference method for tunnel construction, and technique is relatively simple.
With reference to Fig. 1, the only pile foundation structure of large-span arch bridge ultra-large type tilting of the present invention is implemented according to the following steps:
1. clear up base top surface covering layer, in the certain limit of top, corresponding basis, apply anchor cable 30;
2. at ultra-large type tilting only pile foundation construction pipe canopy 41, excavation base top portion rock, then construction anchor pole 42, steel arch-shelf 44, steel longeron 45, steel erect support 43 and steel stull 46 according to the order of sequence; Construct along basic axial order by above flow process, until the end, basis;
3. concreting, completes foundation construction.Construct concrete near basic end face time note pre-buried arch ring steel pipe, reinforcing bar.
The present invention has that structure stress is clear and definite, the reliable feature of construction safety, applicant by its Successful utilization in the design of Chongqing-Guichow Railway youth at night river grand bridge and construction.The main bridge of this bridge adopts 1-370m reinforced concrete arch bridge.This bridge limits by geological conditions, and primary abutment plinth adopts form of structure of the present invention.
Some principles of the only pile foundation structure of the above large-span arch bridge ultra-large type tilting of the present invention that just explains through diagrams, be not the present invention to be confined to shown in and in described concrete structure and the scope of application, therefore every corresponding modify of being likely utilized and equivalent, all belong to the scope of the claims that the present invention applies for.
Claims (2)
1. the only pile foundation structure of large-span arch bridge ultra-large type tilting, comprise pile foundation (20), it is characterized in that: described pile foundation (20) is the only pile foundation of monolithic, direct and arch ring (10) consolidation is integrated, and its pile body gos deep into rock-soil layer along the bearing of trend of arch ring (10) axis.
2. the only pile foundation structure of large-span arch bridge ultra-large type tilting as claimed in claim 1, it is characterized in that: described pile foundation (20) section configuration is similar to tunnel cross-section, axially adopt uniform section or variable cross-section shape along pile body, pile body section is solid or hollow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410620062.2A CN104389317B (en) | 2014-11-06 | 2014-11-06 | The only pile foundation construction of large-span arch bridge ultra-large type tilting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410620062.2A CN104389317B (en) | 2014-11-06 | 2014-11-06 | The only pile foundation construction of large-span arch bridge ultra-large type tilting |
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| CN104389317A true CN104389317A (en) | 2015-03-04 |
| CN104389317B CN104389317B (en) | 2017-10-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970992A (en) * | 2016-05-31 | 2016-09-28 | 中铁局集团有限公司 | Construction process for superlarge-section and large-dip-angle tunnel type pile foundation |
| 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 |
| CN105970991A (en) * | 2016-05-31 | 2016-09-28 | 中铁局集团有限公司 | Excavation and mucking construction process for tilting type superlarge-section single-pile foundation |
| CN107761718A (en) * | 2017-09-20 | 2018-03-06 | 中铁二院工程集团有限责任公司 | Super-section tilting pile foundation self-supporting excavation construction method |
| CN109868746A (en) * | 2019-01-31 | 2019-06-11 | 中铁广州工程局集团桥梁工程有限公司 | A kind of entirety build-in type skewback foundation excavation method |
| CN112482228A (en) * | 2020-11-20 | 2021-03-12 | 浙江省交通规划设计研究院有限公司 | Arch bridge arch foot foundation structure and construction method thereof and arch bridge |
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| CN102425103A (en) * | 2011-08-22 | 2012-04-25 | 彭凯 | Reinforced combined arch ring for arch bridge |
| CN102797218A (en) * | 2012-08-22 | 2012-11-28 | 中铁二院工程集团有限责任公司 | Large-span railway desk type concrete arch bridge structure |
| CN103088749A (en) * | 2013-03-01 | 2013-05-08 | 天津市市政工程设计研究院 | Deck type open shoulder arch bridge and constructing method thereof |
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| CN204185873U (en) * | 2014-11-06 | 2015-03-04 | 中铁二院工程集团有限责任公司 | The only pile foundation structure of large-span arch bridge ultra-large type tilting |
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2014
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970992A (en) * | 2016-05-31 | 2016-09-28 | 中铁局集团有限公司 | Construction process for superlarge-section and large-dip-angle tunnel type pile foundation |
| 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 |
| CN105970991A (en) * | 2016-05-31 | 2016-09-28 | 中铁局集团有限公司 | Excavation and mucking construction process for tilting type superlarge-section single-pile foundation |
| CN105970991B (en) * | 2016-05-31 | 2018-04-03 | 中铁一局集团有限公司 | Large section tilting single-pile foundation excavates and muck removal construction technology |
| CN105970990B (en) * | 2016-05-31 | 2018-08-03 | 中铁一局集团有限公司 | Large section tilting single-pile foundation excavates and panelling construction technique |
| CN107761718A (en) * | 2017-09-20 | 2018-03-06 | 中铁二院工程集团有限责任公司 | Super-section tilting pile foundation self-supporting excavation construction method |
| CN109868746A (en) * | 2019-01-31 | 2019-06-11 | 中铁广州工程局集团桥梁工程有限公司 | A kind of entirety build-in type skewback foundation excavation method |
| CN112482228A (en) * | 2020-11-20 | 2021-03-12 | 浙江省交通规划设计研究院有限公司 | Arch bridge arch foot foundation structure and construction method thereof and arch bridge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104389317B (en) | 2017-10-10 |
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