CN105887657A - Soft foundation road and bridge connecting slope two-dimensional prestressing elastic shell plate application technology - Google Patents
Soft foundation road and bridge connecting slope two-dimensional prestressing elastic shell plate application technology Download PDFInfo
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- CN105887657A CN105887657A CN201410422738.7A CN201410422738A CN105887657A CN 105887657 A CN105887657 A CN 105887657A CN 201410422738 A CN201410422738 A CN 201410422738A CN 105887657 A CN105887657 A CN 105887657A
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Abstract
A novel two-dimensional prestressing elastic shell plate connecting slope technology can solve the normal vehicle bumping problems in soft foundation road and bridge projects; two-dimensional prestressing ribs are novelly introduced in the connecting slope section of the road and bridge; the elastic plate with two-dimensional prestressing ribs can effectively disperse stresses so as to reduce and control settlement deformation of bridgehead back filled soil; and deformation coordinating with the soil body can effectively prevent bridgehead vehicle jumping phenomenon; the novel two-dimensional prestressing elastic shell plate connecting slope technology is novel and unique in design, simple in construction technology, safe and reliable, and has very wide application values.
Description
Art
The invention belongs to a kind of urban municipal road science of bridge building field, be specifically related to a kind of solve soft soil foundation Bridge with in road engineering common jumping car problem connect slope technology.
Background technology
In urban construction, the problem of bumping at bridge-head on soft soil foundation not only can reduce driving comfort level but also serious harm traffic safety.At present, the problem of bumping at bridge-head or the property difficult problem in a world are the most effectively solved.
Owing to bridge has navigation and many requirement the such as drain off floodwaters to limit, therefore floor elevation is usually above road surface, and the factor such as construction and excavation inevitably results in end of the bridge and there is fairly large banketing in addition.Retraining again the soil body in the middle part of comparing because of the end of the bridge soil body few, so the produced deformation of base compress that bankets is the biggest, in general Practical Project, end of the bridge absolute altitude is commonplace compared with general road raising about two meters.During indivedual relatively medium-and-large-sized river course, improve 4-5 rice and also calculate normally.The sedimentation and deformation of its bridge pier in actual use, often within 5cm, the soil body at end of the bridge rear portion compression and being deposited in then up to 20～50cm.
Nowadays in the soft soil foundation of the coastal area such as China Jiangsu and Zhejiang Provinces, prevent nose from jumping difficult point place that car is also engineering design and construction technology.And currently technical measures is also placed on the control of compression, soil solidifying and loaded deformation to end of the bridge backfill soil.Existing design, construction have mainly been taken the concrete measures a variety of, such as: strengthen end of the bridge and return quality of filling soil, take to select good backfill soil and layering rammer to fill out, use retaining wall to close end of the bridge both sides, be also adopted by the new techniques such as relevant geotextiles；Under the precondition controlling back quality of filling soil, the soil body after end of the bridge is progressively taked concrete mixing pile to reinforce the soil body after end of the bridge；At end of the bridge buttress with backfill soil thereafter, use a kind of attachment strap of suitable length, so that the impact of sedimentation is eased by the gradient；Take what Roofing slab connected to connect slope process etc. in end of the bridge proper range.
But, different schemes all achieves certain effect in its specific environment, but for soft soil foundation using the extremely rare of two dimension prestressing elastic thin shell, this kind of scheme to have can effectively to solve car problem of jumping, there is good feasibility and therefore have important realistic meaning simultaneously.
Summary of the invention
Fully analyzing the deficiency of the technical scheme of the pre-anti-jump car of existing end of the bridge and this programme is used the feature of elasticity coverboard, the invention provides a kind of novel soft soil foundation road and bridge connects slope two dimension prestressing elasticity coverboard application technology.
This technology is when solving the jumping car problem in Practical Project, herein in connection with in view of the slope retaining etc. reinforcing end of the bridge.The present invention is made can not only effectively to overcome the problem of bumping at bridge-head also to have the effect of end of the bridge bank protection concurrently.Material, equipment and technique used by the present invention is to be commonly used in current case history, has the best feasibility.Its solve its technical problem technical scheme just be:
1, by having the two dimension prestressing plate of certain rigidity, make the compressive stress on road surface obtain a range of diffusion, and directly reduce soil pressure, thus the sedimentation reducing the bridgehead soil body reached and the effect of compression.
2, it is applied with two dimension prestressing reinforcing bar due to end of the bridge, the bridgehead soil body is had the cohesiveness of level, the soil body is formed operative constraint, thus produces the effect of a kind of similar cuff.It is effectively increased the resistance to compression of the soil body, makes the soil body effectively reduce sedimentation and deformation and compression.
3, owing to this technology have employed, to have the two dimension prestressing coverboard of Reasonable Rigidity be a kind of can to allow its elastic plate with the common compatible deformation of the bottom soil body, deformation is that reduced overall is formed, it is similar to a kind of overlength elasticity attachment strap technology, therefore sudden change sedimentation will not be produced at end of the bridge thus be substantially improved bumping at bridge-head situation.
4, another factor that bumping at bridge-head produces is also in that left and right, bridgehead two ends retaining wall is under soil body thrust, the side-move distortion of retaining wall is to the sedimentation produced, this technology, because stress has been delivered to road line direction, also deforms effectively alleviating produced by the horizontal thrust on both sides retaining wall and impact.
5 additionally, for some special foundation conditions, also reserve grout hole, it can be carried out slip casting pressurization under flexographic plate as a kind of arbitrary way.
The present invention connects slope to soft soil foundation Bridge and provides the benefit that, conveniently end of the bridge can be connect in engineering construction slope construction, can effectively be avoided because local settles problem of bumping at bridge-head that is excessive and that cause by common compatible deformation in actual use.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 be in the present invention attachment strap in the complete layout of end of the bridge
Fig. 2 is the present invention schematic diagram at the vertical section in certain hypothesis section
Fig. 3 is layering schematic diagram
Detailed description of the invention
In FIG, two dimension prestressing flexible board rests on abutment bent cap (2) and concrete sleeper beam (3) as overall (1) two ends respectively with other appendages.In order to reach to accept rational purpose, two dimension prestressing flexible board (1) length L is usually about 7 times of bridge floor and superelevation of highway surface h, can make arch camber depending on practical situation in addition and process.
Fig. 2 certain assume section connect in the example of slope, prestressing force typically can use pre-tensioning system technique, backfill soil (5) at end of the bridge retaining wall (4) rear portion is successively tamped, its top remakes prestressing force elasticity coverboard (6), wherein carry out arrangement of reinforcement, and stretch-draw two dimension prestressing reinforcing bar (9).And solidifying soil stabilization layer (7) is laid in upper back, then topmost is road structure layer and road surface (8).Reserved pore (11) is to banket Compression Settlement in order to compensate rammer as later stage grouting under pressure hole.
In Specific construction, effectively guaranteeing that the flexible armoured concrete slab that thickness is 6cm～12cm reaches lucky elastic stage, be the guardian technique requirement of this technology, all structural flexibilities also can have the compatibility after being reflected in foundation soil deformation, i.e. synchronizes deformation.This function is mainly produced by two dimension prestressing with effect, additionally must conscientiously carry out roadbed stable layer, it is ensured that bridge pier avris returns the safeguard that quality of filling soil is also the most important thing.
In the planar layer schematic diagram of Fig. 3, as presstressed reinforcing steel (9), bar-mat reinforcement (12), stabilized zone (7), structure sheaf and the horizontal layout schematic diagram of road surface (8) of configuration in the roadbase soil body, major part two dimension prestressing elasticity coverboard (6) of the present invention from lower-left to upper right.Prestressing force typically can use pre-tensioning system technique, owing to presstressed reinforcing steel is as a kind of frame mode and the technique alleviating stress, arrangement pitch is often relatively dredged, typically can arrange between@500～@1000, and longitudinally can also select respectively by designing according to the practical situation of engineering with horizontal spacing.Presstressed reinforcing steel end anchorage (10) is separately fixed on abutment bent cap (2), concrete sleeper beam (3) and side retaining wall capping beam (13).
Claims (8)
1. an engineering scheme for innovation, mainly solves jumping car problem common in the science of bridge building of soft soil foundation.
Technical scheme the most according to claim 1, is characterized in that: use a kind of overall structure (1) with novel two dimension prestressing elastic plate that end of the bridge is connect slope.
The most according to claim 2 connect slope structure (1), it is characterized in that mainly being collectively constituted by compacted fill (5), two dimension prestressing elastic plate (6), concrete stabilized zone (7) and road structure aspect layer (11).
Prestressing force flexible board the most according to claim 2, it is characterized in that more practical engineering calculation can rationally arch camber, reach to accept rational purpose.
Prestressing force flexible board the most according to claim 2, is characterized in that having reserved grout hole (13) can carry out special grouting pressurized treatments according to Practical Project situation.
Two dimension prestressing elastic plate (6) the most according to claim 3, it is characterized in that there is two dimension prestressing stretch-draw, surrounding contacts with the retaining wall capping beam (13) of end of the bridge bent cap (2), afterbody sleeper beam (3) and both sides respectively, and is effectively anchored by anchorage (10) etc..
Two dimension prestressing muscle (9) the most according to claim 6, its stretching mode is according to being pre-tensioning system or post stretching depending on practical situation, have bonding or soap-free emulsion polymeization mode.
8. all scantlings of the present invention determine all in accordance with Practical Project appropriate design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410422738.7A CN105887657A (en) | 2014-08-22 | 2014-08-22 | Soft foundation road and bridge connecting slope two-dimensional prestressing elastic shell plate application technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410422738.7A CN105887657A (en) | 2014-08-22 | 2014-08-22 | Soft foundation road and bridge connecting slope two-dimensional prestressing elastic shell plate application technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105887657A true CN105887657A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410422738.7A Pending CN105887657A (en) | 2014-08-22 | 2014-08-22 | Soft foundation road and bridge connecting slope two-dimensional prestressing elastic shell plate application technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638291A (en) * | 2017-02-14 | 2017-05-10 | 上海市城市建设设计研究总院（集团）有限公司 | Structure of arc-shaped lap-joint slab capable of reducing bridge circulation control joint swelling and shrinking |
| CN106638277A (en) * | 2017-02-14 | 2017-05-10 | 上海市城市建设设计研究总院（集团）有限公司 | Expansible bridge abutment approach slab structure |
| CN106758782A (en) * | 2017-02-14 | 2017-05-31 | 上海市城市建设设计研究总院（集团）有限公司 | The construction of bridge hazard to bridge's pier end horizontal active force can be reduced |
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| CN2533153Y (en) * | 2002-03-20 | 2003-01-29 | 宁波市城市建设设计院 | Bridge approach capable of preventing car from skipping |
| CN2627053Y (en) * | 2003-05-30 | 2004-07-21 | 长安大学 | Pile form abutment soft patch |
| CN1540100A (en) * | 2003-10-30 | 2004-10-27 | 湖南大学 | Complete seamless bridge in road |
| KR100503867B1 (en) * | 2005-02-23 | 2005-07-26 | (주)신광건설 | A water interception apparatus of the bridge slab |
| 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 |
| CN103741595A (en) * | 2014-01-21 | 2014-04-23 | 浙江省交通规划设计研究院 | Bridge head structure for controlling bump at bridge head |
| CN203716051U (en) * | 2014-01-21 | 2014-07-16 | 浙江省交通规划设计研究院 | Soft soil foundation based bridgehead structure |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2533153Y (en) * | 2002-03-20 | 2003-01-29 | 宁波市城市建设设计院 | Bridge approach capable of preventing car from skipping |
| CN2627053Y (en) * | 2003-05-30 | 2004-07-21 | 长安大学 | Pile form abutment soft patch |
| CN1540100A (en) * | 2003-10-30 | 2004-10-27 | 湖南大学 | Complete seamless bridge in road |
| KR100503867B1 (en) * | 2005-02-23 | 2005-07-26 | (주)신광건설 | A water interception apparatus of the bridge slab |
| 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 |
| CN103741595A (en) * | 2014-01-21 | 2014-04-23 | 浙江省交通规划设计研究院 | Bridge head structure for controlling bump at bridge head |
| CN203716051U (en) * | 2014-01-21 | 2014-07-16 | 浙江省交通规划设计研究院 | Soft soil foundation based bridgehead structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638291A (en) * | 2017-02-14 | 2017-05-10 | 上海市城市建设设计研究总院（集团）有限公司 | Structure of arc-shaped lap-joint slab capable of reducing bridge circulation control joint swelling and shrinking |
| CN106638277A (en) * | 2017-02-14 | 2017-05-10 | 上海市城市建设设计研究总院（集团）有限公司 | Expansible bridge abutment approach slab structure |
| CN106758782A (en) * | 2017-02-14 | 2017-05-31 | 上海市城市建设设计研究总院（集团）有限公司 | The construction of bridge hazard to bridge's pier end horizontal active force can be reduced |
| CN106758782B (en) * | 2017-02-14 | 2021-05-11 | 上海市城市建设设计研究总院（集团）有限公司 | Structure capable of reducing horizontal acting force at end part of bridge abutment butt strap |
| CN106638291B (en) * | 2017-02-14 | 2021-08-31 | 上海市城市建设设计研究总院（集团）有限公司 | Arc-shaped lapping plate structure capable of reducing expansion and contraction amount of bridge circulation control joint |
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Application publication date: 20160824 |