CN107401118A - A kind of suspension bridge pier-stage type prestressing force anchorage - Google Patents
A kind of suspension bridge pier-stage type prestressing force anchorage Download PDFInfo
- Publication number
- CN107401118A CN107401118A CN201611262556.3A CN201611262556A CN107401118A CN 107401118 A CN107401118 A CN 107401118A CN 201611262556 A CN201611262556 A CN 201611262556A CN 107401118 A CN107401118 A CN 107401118A
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- CN
- China
- Prior art keywords
- steel pipe
- anchorage
- main push
- steel
- towing rope
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- 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
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
-
- 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
- E02D27/50—Anchored foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
Abstract
The invention discloses a kind of suspension bridge pier-stage type prestressing force anchorage, it is made up of steel structure concrete cushion cap, steel pipe pile group, prestress anchorage cable group, main push-towing rope, main push-towing rope anchoring system, steel pipe pile group is made up of soldier piles and taper pile, basement rock is stretched into one end of soldier piles and taper pile, and the other end is rigidly connected with steel structure concrete cushion cap；Basement rock is fixed at prestress anchorage cable group's Inner bolt head end, and outer anchor head end is fixedly connected with steel structure concrete cushion cap, 05 ° of the overall Impact direction of prestress anchorage cable group and the angle in main push-towing rope direction；Main push-towing rope anchoring system is fixed on the top of steel structure concrete cushion cap.The present invention transmits the huge pulling force of main push-towing rope to basement rock by prestress anchorage cable group, changes traditional force way of anchorage structures, greatly improves the load scope of anchorage structures, provide a kind of new way for Super-Long Span Suspension Bridges construction, save engineering cost.
Description
Technical field
The invention belongs to technical field of bridge engineering, is more particularly to a kind of suspension bridge pier-stage type prestressing force anchorage, is applicable
In the construction of the Analysis of Suspension Bridges ' Anchorage such as great river big lake, be particularly suitable for use in coastal waters Plain or marine Super-Long Span Suspension Bridges anchorage construction.
Background technology
Suspension bridge is the maximum type of bridge of current span ability in the world, is divided into self-anchored type according to main push-towing rope anchorage style and hangs
Two kinds of forms of cable bridge and earth anchored suspension bridge.Earth anchored suspension bridge is mainly made up of anchorage, Sarasota, funicular system, stiff girder etc.,
Anchorage therein is generally divided into gravity anchor and the class of tunnel-type anchorage two as the important component that cable power is passed to ground.
Tunnel-type anchorage relies on male cone body and transfers the huge pulling force of surrounding rock body shared main push-towing rope, although cost is relatively low, and
Have and earth's surface heavy excavation, the unique advantage of environmental protection need not be limited yet with by topographic and geologic condition, only closed
It could be applied under conditions of suitable.
Gravity anchor relies on the dead-weight balanced main push-towing rope vertical direction component of anchorage, by the frictional resistance f between basis and ground
Main push-towing rope horizontal component is balanced, and the difference (i.e. Fig. 1, f=G-Nv) that frictional resistance relies on the anchorage deadweight G and vertical component Nv of main push-towing rope is produced
It is raw, exist when being built in underground water or water for anchorage deadweight G and main push-towing rope vertical component Nv and uplift pressure F difference（That is Fig. 1, f=
G-Nv-F）, therefore gravity anchor is bulky, the efficiency that this kind of anchorage plays effect is low.As bridge construction is from inland river
Bay, off-lying sea are moved towards in river, and therefrom Long span moves towards large span, and the requirement to the bearing capacity of Analysis of Suspension Bridges ' Anchorage structure is increasingly
Height, it is also increasing to build the difficulty of construction that Anchor Foundation faces.Super-Long Span Suspension Bridges anchorage base is built in big rivers,lakes and seas
Plinth, gravity anchor, which has the efficiency for needing heavy excavation, playing effect, lowly causes that anchorage is bulky, casting concrete amount is huge
Greatly, the problem of big to environmental disturbances and cost is higher.In addition, gravity anchor is built in water to be needed to set cofferdam, land
Also when building to need to set diaphram wall, difficulty of construction is big more.Therefore, need badly and improve existing anchorage structures form.
The content of the invention
The purpose of the present invention is to be the provision of a kind of suspension bridge pier-stage type prestressing force anchorage, simple in construction, easy to use,
Solve that gravity anchor excavated volume is big, builds that gravity anchorage difficulty of construction is big, plays effect efficiency in and water big to environmental disturbances
The problem of low.
In order to realize above-mentioned purpose, the present invention uses following technical scheme：
A kind of suspension bridge pier-stage type prestressing force anchorage, it include steel structure concrete cushion cap, steel pipe pile group, prestress anchorage cable group,
Basement rock is stretched into main push-towing rope and main push-towing rope anchoring system, one end of steel pipe pile group, and the other end rigidly connects with steel structure concrete cushion cap bottom surface
Connect, main push-towing rope anchoring system is arranged on the upper surface of steel structure concrete cushion cap, the anchor cable Inner bolt head of described prestress anchorage cable group
End is fixed in basement rock, and the outer anchor head end of anchor cable of prestress anchorage cable group is fixedly connected with steel structure concrete cushion cap, prestressed anchor
Suo Qun overall Impact direction and the angle in main push-towing rope direction are 0-5 °.
Preferably, described steel pipe pile group is made up of steel pipe soldier piles and inclined steel-pipe pile, sets and intersect between steel pipe soldier piles
Soldier piles support, inclined steel-pipe pile be arranged on the periphery of steel structure concrete cushion cap and to external diffusion tilt.
Described steel pipe soldier piles are substantially made up of a diameter of 2m of 8-18 roots steel pipe, and its quantity will be according to the ton of concrete engineering
Situations such as position, depth of water, determines.
Described inclined steel-pipe pile is substantially made up of a diameter of 2m of 4-8 roots steel pipe, and the inclination angle of inclined steel-pipe pile is 5-15 °, its
Particular number will determine according to concrete engineering design requirement.
Described prestress anchorage cable group is made up of a series of prestress anchorage cable that single tonnages are 200t ~ 500t, its quantity
Determination to be determined according to the design cable power and safety margin degree of concrete engineering.
Preferably, the stiff skeleton of described steel structure concrete cushion cap is shaped steel, to improve the reliability of cushion cap.
Preferably, the anchor cable of described prestress anchorage cable group preferably uses pressure dispersing anchorage cable, especially should be noted strict
Antiseepage, can also use can multiple free tensioning Geotechnical Engineering compact-type prestress anchorage cable.Based on prestress anchorage cable group
The load-carrying member wanted, its reliability and durability are most important, therefore anchor head end need to install corresponding survey outside prestress anchorage cable
Power apparatus, constantly to monitor stress of the prestress anchorage cable during construction and operation, it is easy to the anchoring of prestress anchorage cable to lock
And changed in time when single prestress anchorage cable fails.
The present invention mentality of designing be：Prestress anchorage cable group's totality Impact direction is approximate with main push-towing rope cable force direction consistent, hangs
Cable bridge tension of main cable is converted into multiply prestress anchorage cable power by main push-towing rope anchoring system and reaches basement rock so that steel pipe under bridge completion state
Pile group is subjected only to the effect of fraction pressure；Steel structure concrete cushion cap forms pier-stage type basis with steel pipe pile group, and cushion cap is main push-towing rope
And prestress anchorage cable group provides anchored platform, main push-towing rope cable power is effectively reached basement rock, steel pipe pile group top by prestress anchorage cable group
Hold as steel structure concrete cushion cap, steel pipe pile group is connected as a single entity by cushion cap, the globality of steel pipe pile group and anti-is strengthened with this
Deformability.
Compared with the prior art, the present invention has advantages below and beneficial effect：
1st, the huge pulling force of main push-towing rope is transmitted to basement rock by high-tonnage prestressed cable group, independent of anchorage structures itself weight and
Basis and ground frictional resistance load, can effectively reduce concrete amount, reduce construction costs, expand holding for anchorage structures again
Power scope；
2nd, the structure type of pier is borrowed, pier construction technology is ripe, and compared with building gravity anchor, not only difficulty of construction is big
Amplitude reduction and speed of application is fast；
3rd, heavy excavation is not required to using the anchorage of the present invention, it is small to surrounding environment interference, reach the purpose of harmonious co-existence between man and nature,
In tunnel-type anchorage construction, also the scattered prestress anchorage cable group for being anchored in basement rock can be used to replace the concrete anchor cock body poured
Load, rock excavation is avoided, saved engineering cost；
4th, in steel pipe pile group, soldier piles support plays a part of support between being connected to soldier piles, and peripheral taper pile is directly beaten to basement rock, from
And effectively improve the safety and resistance to overturning of structure.
5th, using the present invention can reliable delivery tension of main cable, concrete amount can significantly drop compared with large-span suspension bridge gravity anchor
It is low (to use the main span of gravity anchor exemplified by 1377m Hong Kong Tsingma Bridge by both sides, both sides anchorage concrete amount is high
Up to 29.2 ten thousand m3, concrete amount can be then greatly reduced using the present invention), effectively reduce anchorage cost and shorten anchorage and apply
The work cycle.
Brief description of the drawings
Fig. 1 is that a kind of gravity anchor plays effect schematic diagram.
Wherein N is tension of main cable, and Nv is main push-towing rope vertical direction component, and Nh is main push-towing rope horizontal direction component, and F is gravity anchorage
Suffered uplift pressure, G conduct oneself with dignity for gravity anchor, frictional resistances of the f between gravity Anchor Foundation and basement rock, and f=（G-F-NV）*μ.
Fig. 2 is a kind of three dimensional structure diagram of pier-stage type prestressing force anchorage.
Fig. 3 is a kind of pier-stage type prestressing force anchorage two dimension stress diagram.
Tension of main cable is represented to upward arrow, down arrow represents prestressed anchor rustling sound power.
Fig. 4-a are a kind of top view of pier-stage type prestressing force anchorage.
Fig. 4-b are a kind of front view of pier-stage type prestressing force anchorage.
Fig. 4-c are a kind of side view of pier-stage type prestressing force anchorage.
In Fig. 2 to 4：1- steel structure concrete cushion caps；2- steel pipe pile groups；2A- steel pipe soldier piles, 2B- inclined steel-pipe piles, 2C-
Soldier piles support；3- prestress anchorage cable groups；4- main push-towing ropes；5- main push-towing rope anchoring systems.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing：
As shown in Fig. 1-Fig. 4-c, a kind of suspension bridge pier-stage type prestressing force anchorage, including steel structure concrete cushion cap 1, steel pipe pile group
2nd, prestress anchorage cable group 3, main push-towing rope 4, main push-towing rope anchoring system 5, steel pipe pile group 2 is by steel pipe pile group soldier piles 2A and steel pipe pile group taper pile 2B
Form, the steel pipe pile group soldier piles 2A is made up of 8 or 13 or 18 a diameter of 2m steel pipe；Described inclined steel-pipe pile 2B is arranged on
The periphery of steel structure concrete cushion cap 1 is simultaneously tilted to external diffusion, and steel pipe pile group taper pile 2B is existed by 4 or 6 or 8 a diameter of 2m inclination angles
5 ° or 10 ° or 15 ° of steel pipe compositions；Basement rock is stretched into steel pipe pile group soldier piles 2A and steel pipe pile group taper pile 2B one end, and steel pipe pile group erects
The stake 2A and steel pipe pile group taper pile 2B other end is rigidly connected with steel structure concrete cushion cap 1.Prestress anchorage cable group 3 is by 10 or 12
Or 14 a diameter of 0.6m prestress anchorage cable composition；The Inner bolt head end of each single prestress anchorage cable in prestress anchorage cable group 3
Be fixed on basement rock, outer anchor head end is fixedly connected with steel structure concrete cushion cap 1, the overall Impact direction of prestress anchorage cable group 3 with
The angle in the direction of main push-towing rope 4 is 0 ° or 2 ° or 4 ° or 5 °, and prestress anchorage cable group direction inclination angle is slightly larger than the inclination angle of main push-towing rope 4（0 ° or
2 ° or 4 ° or 5 °）, so as to ensure prestress anchorage cable group's totality Impact direction with main push-towing rope direction close to unanimously so that under bridge completion state
Steel-pipe pile is subjected only to the effect of fraction pressure；Main push-towing rope 4 dissipates the strand after rope and is connected with main push-towing rope anchoring system 5, main push-towing rope anchoring system 5
It is fixed on the top of steel structure concrete cushion cap 1.
Embodiment 1：
The steel pipe soldier piles 2A is made up of 15 a diameter of 2m steel pipe, described inclined steel-pipe pile 2B by 6 a diameter of 2m steel
Pipe forms, and inclination angle is 10 °.Prestress anchorage cable group 3 is made up of a series of prestress anchorage cable that single tonnages are 500t, and main push-towing rope is set
It is 0.7 ten thousand tons to count cable power, and the quantity of prestress anchorage cable 14, single prestress anchorage cable preferably uses pressure dispersing anchorage cable, especially
Should be noted strict antiseepage, or using can multiple free tensioning Geotechnical Engineering compact-type prestress anchorage cable.
In embodiment, in order to improve the reliability of steel structure concrete cushion cap 1, from stiffness bone of the shaped steel as cushion cap
Frame.
Embodiment 2：
Using the structure of embodiment 1, specific quantity and inclination angle are changed, and prestress anchorage cable group 3 is by a series of single tonnages
200t or 300t prestress anchorage cable composition；The overall Impact direction of prestress anchorage cable group and the angle in main push-towing rope direction are 0 °, from
And ensure that prestress anchorage cable group's totality Impact direction is consistent with main push-towing rope direction so that steel-pipe pile is subjected only to fraction under bridge completion state
Pressure acts on.
The steel pipe soldier piles 2A is made up of 8 or 18 a diameter of 2m steel pipe, and described inclined steel-pipe pile 2B is straight by 4 or 8
The steel pipe that footpath is 2m forms, and inclination angle is 15 °.A series of prestress anchorage cable group of the prestress anchorage cable group 3 by single tonnages for 200t
Cheng Shi, the design cable power of main push-towing rope is 0.2 ten thousand tons（In the case of small across footpath and rock matter condition are very good）, the quantity 10 of prestress anchorage cable
Root；When prestress anchorage cable group 3 is made up of a series of prestress anchorage cable that single tonnages are 300t, the design cable power of main push-towing rope is 20,000
Ton, the quantity of prestress anchorage cable at least 67, particular number will increase according to specific engineering design requirements, single prestressed anchor
Suo Yi uses pressure dispersing anchorage cable, especially should be noted strict antiseepage, or using can multiple free tensioning Geotechnical Engineering it is close
Full mold prestress anchorage cable.
A kind of construction method of suspension bridge pier-stage type prestressing force anchorage, its step are：
1st, the construction of steel pipe pile group：According to engineering geological condition, soldier piles and peripheral taper pile are made using modes such as static press piling, hammerings
Stake → pitching pile → hammering sinking → pile extension → hammering to projected depth → inscribe steel-pipe pile → pressure is moved into place → hangs according to stake machine
The sequence of construction of power grouting stretches into basement rock certain depth, between bracing members are then connected to soldier piles with Type of Welding, takes 881-X rings
The anti-corrosion measure of oxygen zinc rich primer；
2nd, the construction of steel structure concrete cushion cap：Shaped steel stiff skeleton is hung first, then hierarchical block casting concrete；
3rd, the construction of main push-towing rope anchoring system and main push-towing rope dissipate rope；
When the 4th, using of the invention in water, prestress anchorage cable installation needs the steel pipe that diameter is first more than to 1.5 times of prestress anchorage cable diameters
Squeeze into water, prestress anchorage cable installation is completed in then lashing, during using traditional clip type prestress anchorage cable, need to use PE bellowss
The anti-corrosion measure of interior note paste resin；
5th, prestress anchorage cable stretch-draw anchor and main cable strand anchoring：For ensure cushion cap and steel-pipe pile in work progress it is reasonable by
Power, prestress anchorage cable group tensioning and main push-towing rope anchoring interval are carried out, and 25% → anchoring main push-towing rope of stretch-draw prestressing force anchorage cable design load dissipates
40% → stretch-draw prestressing force anchorage cable design lotus of the 50% of 20% → stretch-draw prestressing force anchorage cable design load of stock → anchoring main push-towing rope broken lot
The 80% of 100% → anchoring main push-towing rope broken lot of 60% → stretch-draw prestressing force anchorage cable design load of 75% carried → anchoring main push-towing rope broken lot →
Anchor the 100% of main push-towing rope broken lot.
Claims (6)
1. a kind of suspension bridge pier-stage type prestressing force anchorage, it includes steel structure concrete cushion cap（1）With steel pipe pile group（2）, steel pipe
Pile group（2）One end stretch into basement rock, the other end and steel structure concrete cushion cap（1）Bottom surface is rigidly connected, it is characterised in that：Also wrap
Include prestress anchorage cable group（3）, main push-towing rope（4）With main push-towing rope anchoring system（5）, described main push-towing rope anchoring system（5）It is arranged on steel construction
Concrete bearing platform（1）Upper surface, described prestress anchorage cable group（3）Anchor cable Inner bolt head end be fixed in basement rock, prestressing force
Anchor cable group（3）The outer anchor head end of anchor cable and steel structure concrete cushion cap（1）It is fixedly connected, prestress anchorage cable group（3）It is overall by
Force direction and main push-towing rope（4）The angle in direction is 0-5 °.
A kind of 2. suspension bridge pier-stage type prestressing force anchorage according to claim 1, it is characterised in that:Described steel pipe pile group
（2）By steel pipe soldier piles（2A）And inclined steel-pipe pile（2B）Form, steel pipe soldier piles（2A）Between set the soldier piles of intersection to support（2C）, steel
Pipe taper pile（2B）It is arranged on steel structure concrete cushion cap（1）Periphery and to external diffusion tilt.
A kind of 3. suspension bridge pier-stage type prestressing force anchorage according to claim 2, it is characterised in that:Described steel pipe soldier piles
（2A）It is made up of a diameter of 2m of 8-18 roots steel pipe.
A kind of 4. suspension bridge pier-stage type prestressing force anchorage according to Claims 2 or 3, it is characterised in that:Described steel pipe
Taper pile（2B）It is made up of a diameter of 2m of 4-8 roots steel pipe, the inclination angle of inclined steel-pipe pile is 5-15 °.
A kind of 5. suspension bridge pier-stage type prestressing force anchorage according to claim 1, it is characterised in that:Described prestressed anchor
Suo Qun（3）Anchor cable be pressure dispersing anchorage cable.
A kind of 6. suspension bridge pier-stage type prestressing force anchorage according to claim 1, it is characterised in that:Described steel construction
Concrete bearing platform（1）Stiff skeleton be shaped steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610580008.9A CN106087742A (en) | 2016-07-22 | 2016-07-22 | A kind of suspension bridge pier-stage type prestressing force anchorage |
| CN2016105800089 | 2016-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107401118A true CN107401118A (en) | 2017-11-28 |
Family
ID=57449913
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610580008.9A Withdrawn CN106087742A (en) | 2016-07-22 | 2016-07-22 | A kind of suspension bridge pier-stage type prestressing force anchorage |
| CN201611262556.3A Pending CN107401118A (en) | 2016-07-22 | 2016-12-30 | A kind of suspension bridge pier-stage type prestressing force anchorage |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610580008.9A Withdrawn CN106087742A (en) | 2016-07-22 | 2016-07-22 | A kind of suspension bridge pier-stage type prestressing force anchorage |
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| CN (2) | CN106087742A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073554A (en) * | 2021-03-08 | 2021-07-06 | 中国葛洲坝集团路桥工程有限公司 | Large-tonnage anchorage structure on steep slope and construction method thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351121A (en) * | 2016-11-01 | 2017-01-25 | 中国科学院武汉岩土力学研究所 | Suspension cable bridge abutment type pre-stress anchorage |
| CN107059617A (en) * | 2016-12-24 | 2017-08-18 | 中铁十八局集团有限公司 | A kind of interim anchorage of combined type |
| CN108867377B (en) * | 2018-07-02 | 2020-10-16 | 中铁大桥勘测设计院集团有限公司 | Anchor ingot structure and suspension bridge suitable for on water |
| CN113175091B (en) * | 2021-04-27 | 2022-08-02 | 中铁十六局集团电气化工程有限公司 | Fully assembled prestressed frame cable system combined structure |
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| JPH083920A (en) * | 1994-06-21 | 1996-01-09 | Hazama Gumi Ltd | Mountain suspension bridge |
| CN202187287U (en) * | 2011-07-30 | 2012-04-11 | 四川省交通运输厅公路规划勘察设计研究院 | Small-medium span suspension bridge anchorage structure under weak geological conditions |
| CN202530367U (en) * | 2012-03-14 | 2012-11-14 | 中铁二十二局集团第一工程有限公司 | Deepwater complex geology foundation construction system |
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2016
- 2016-07-22 CN CN201610580008.9A patent/CN106087742A/en not_active Withdrawn
- 2016-12-30 CN CN201611262556.3A patent/CN107401118A/en active Pending
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| JPH083920A (en) * | 1994-06-21 | 1996-01-09 | Hazama Gumi Ltd | Mountain suspension bridge |
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| CN202530367U (en) * | 2012-03-14 | 2012-11-14 | 中铁二十二局集团第一工程有限公司 | Deepwater complex geology foundation construction system |
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| CN206591438U (en) * | 2016-07-22 | 2017-10-27 | 中国科学院武汉岩土力学研究所 | A kind of suspension bridge pier-stage type prestressing force anchorage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073554A (en) * | 2021-03-08 | 2021-07-06 | 中国葛洲坝集团路桥工程有限公司 | Large-tonnage anchorage structure on steep slope and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN106087742A (en) | 2016-11-09 |
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