CN103526728B - A kind of gravity overfall dam directly adds or increases the method for gate - Google Patents
A kind of gravity overfall dam directly adds or increases the method for gate Download PDFInfo
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- CN103526728B CN103526728B CN201310532612.0A CN201310532612A CN103526728B CN 103526728 B CN103526728 B CN 103526728B CN 201310532612 A CN201310532612 A CN 201310532612A CN 103526728 B CN103526728 B CN 103526728B
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- gate
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- overfall dam
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Abstract
The present invention relates to a kind of method gravity overfall dam directly adding or increases gate, belong to power station gravity dam and directly increase and realize flooding the method for dilatation.Structure modified technology is adopted original structure to be carried out to the modification of bearing mode, namely the load mode of former overfall dam is changed by prestress anchoraging under water, its supporting capacity of effective raising, the load increased with dam body self increasing that the raising head of lock body transmission produces newly with anchoring and prestressing force shared.Advantage realizes low cost directly to add gate to improve power station water storage level, solve that water conservancy project gravity overfall dam sets up that gate construction costs is higher, the construction period can not retaining, affects at flowing subaqueous work the technical barrier that engineering carries out phase on-road efficiency.
Description
Technical field
The invention belongs to power station gravity dam directly to increase and realize flooding the method for dilatation.
Background technology
Hydroelectric generation is clean energy resource, and hydroelectric station operation head height is the key determining its generating capacity.Because early stage hydroelectric station design standard is on the low side, there is reservoir head, storage capacity deficiency causes not reaching the problem designing generating capacity, directly affect its power benefit.The reservoir compatilizing mechanism improving operating head polishing is all carried out in a lot of power station in reinforcement process at present, improves hydroelectric capacity.Due to square being directly proportional of water pressure and head, therefore filling water head pressure that retaining building is increased is improved very large, in general, the compatilizing mechanism improving water storage level all needs to carry out weightening finish to gravity dam or overfall dam and trains thick increasing, to increase antiskid, to resist and incline and shear resistance, and this technical method duration is longer, and direct construction costs can be caused higher, and construction period power station can not normally be run, directly affect the profit point of the construction period of engineering.On the other hand, a large amount of cement of construction application, stone material, sand material, have larger harm to environment, and produce larger energy consumption.
Anchor cable or steel strand anti-corrosion protection have larger realistic meaning, and thinking that cement paste forms alkaline passivation film in early days can available protecting anchor cable and anchor district, and actual conditions in recent years show, passivating film protection is limited.It is damaged that non-bending steel cable also may produce topping in the friction of holding in power process or extruding, is partially formed anchor cable muscle material exposed region, load muscle material may be caused to corrode, form the hidden danger of engineering safety; Bonded prestress then all needs anti-corrosion protection, and the meaning of resistance rust is then more obvious.
Summary of the invention
The invention provides a kind of method gravity overfall dam directly adding or increases gate, to solve in the construction of band regimen condition, need ancillary works, subaqueous construction difficulty is large, effect is undesirable problem; Realize power station to improve head, increase storage capacity and then improve generating capacity.
The technical scheme that the present invention takes comprises the following steps:
(1) design
According to the height that will increase head, that determines overfall dam gate increases height or the height of newly-increased gate, this increase after gate or the height of newly-increased gate be less than 7 meters;
For originally having pedestrian bridge or access bridge bridge pier and not having the overfall dam of gate, adopt and People's Bank of China's bridge pier is modified as gate pier, carry out setting up gate: calculate the structural safety of overfall dam and undertaken by existing software for calculation, comprise and carry out slide, overturning or slip resistance analysis calculating, require that dam body does not produce tensile stress; For the overfall dam of original pedestrian bridge or access bridge bridge pier, the mode determining its structural adjustment structure is calculated by structural-load-carrying capacity, the additional moment that the pressure of gate transmission produces is born in conjunction with the anchor bar concrete structure after bar planting of slotting in weir by prestressing force, shearing is born by improved gate pier structure, anchored force is structural calculation routinely, computation structure bar planting;
There is gate for former overfall dam, then carry out gate and increase: for original gate pier, calculated the mode determining its structural adjustment structure by structural-load-carrying capacity, adopt slot treatment gate pier, and carry out bar planting, formed in conjunction with prestressed gate pier;
(2) Underwater Deep-hole prestress anchoraging
(1) adopt rig punching, aperture, calculate according to anchored force and determine anchorage depth, require that going deep into minimum fresh scar is not less than 2 meters;
(2) carry out prestress anchoraging immediately after boring, if the interval long period, then need anchoring after hole flushing;
(3) by anchor cable measure on request, and suppress anchor end, arrange by aperture and fix anchor cable position, in lower hand-hole;
(4) configure Anchor Agent, 700r/m stirs 1 ~ 3 minute;
Described Anchor Agent comprises the raw material of following weight portion:
(5) Anchor Agent grouting pump is poured in anchor hole, if anchoring in water burst hole or circulating water, need with Chinese patent " being convenient to the device of prestressed cable anchorage " supplementary anchorage;
(3) anti-corrosion protection slurry is filled with after stretch-draw,
Described anti-corrosion protection slurry comprises the raw material of following weight portion:
(4) stretching end sealing off and covering anchorage, sealing off and covering anchorage concrete is identical with ordinary concrete casting method;
Described anticorrosion sealing off and covering anchorage concrete material comprises the raw material of following weight portion:
The Stability Analysis of Structures caused for solution overfall dam pressure increase and the problem of Lack of support, the present invention adopts structure modified technology to carry out the modification of bearing mode to original structure: namely change the load mode of former overfall dam by prestress anchoraging under water, its supporting capacity of effective raising, the load increased with dam body self increasing that the raising head of lock body transmission produces newly with anchoring and prestressing force shared.Realize low cost and directly add gate to improve power station water storage level, solve that water conservancy project gravity overfall dam sets up that gate construction costs is higher, the construction period can not retaining, affect at flowing subaqueous work the technical barrier that engineering carries out phase on-road efficiency.
This technology migration rust-prevent technology realizes significantly improving prestress anchorage cable, antiseptic power that power structure is held in anchor district, significantly improves prestressed structure application life.
This technology, in the construction of band regimen condition, does not generally need ancillary works, solves the technical barrier that subaqueous construction difficulty is large, effect is undesirable.Adopt this technology construction speed fast, substantially on engineering operation without impact.
The mechanism of action of the present invention is the chemical characteristic utilizing cement material and adding material, and anchor grouting adopts the perfusion of concrete grouting pump, and sealing off and covering anchorage concrete is identical with ordinary concrete casting method.Good compatibility is had with former concrete substrate because sealing off and covering anchorage concrete has, seaming zone bonding ungauged regions, better with both sides concrete binding, Surface layer's concrete closure is good, and has the performance of cracking resistance, waterproof, anticorrosion, freeze proof, wear-resisting, ageing-resistant and anti-chloride permeability.The intensity of concrete or mortar, toughness and mobility can be changed by adjusting parameter.
Adopt technology of the present invention to carry out increasing gravity overfall dam water retaining height, low cost can be realized, do not affect or run engineering operation less.Anchoring material is short for time of setting, and being no more than 24 hours can carry out anchorage cable stretching.Anchor cable antiseptic property is good, significantly improves project durability good, and gas phase resistance rust material not easily runs off, and concrete work amount is little, consumes energy low, environmentally safe.
Advantage of the present invention: can construct under band regimen condition, do not need ancillary works, reduce the direct investment of setting up gate at water conservancy project gravity overfall dam, the construction period can retaining, and do not affect engineering operation phase benefit, solve the technical barrier that subaqueous construction difficulty is large, effect is undesirable.For anchor cable and anchor district, pollution-free and significantly improve anchoring durability to underground water after adopting long-acting pollution-free resistance rust material processed.Still can keep not corrosion within certain period with the bonding steel strand that have after long-acting pollution-free resistance rust material processed, the duration interval of a period of time can be ensured.
Accompanying drawing explanation
Fig. 1 the present invention is by the generalized section of bridge pier structure modification;
Under Fig. 2 the present invention has bridge pier situation, bridge pier structure modification floor map;
Fig. 3 the present invention without in bridge pier situation, to the structurally-modified floor map of gate pier;
Fig. 4 the present invention, without in bridge pier situation, ties the generalized section of structure modification gate pier.
Detailed description of the invention
Embodiment 1
Power station dilatation, requires to increase by 2.5 meters, head.By design procedure of the present invention:
(i) determine: gravity Overflow Section adopt People's Bank of China's bridge pier is modified as gate pier set up gate scheme, needing anchoring anchor cable 18 to restraint as calculated, is vertical anchor hole, construction period power station reservoir impoundment power generation, and construction period band water is constructed;
For original People's Bank of China bridge pier, calculated by structural-load-carrying capacity and determine to adopt prestressing force to be modified as gate pier in conjunction with bar planting process of slotting in weir, the water pressure of gate transmission is born by anchor bar concrete structure, bar planting material Anchor Agent of the present invention, anchored force is structural calculation routinely, by computation structure bar planting, every gate pier needs 2 bundle prestressing force non-bonded anchorage cables;
(2) Underwater Deep-hole prestress anchoraging
(1) adopt rig punching, aperture, calculate according to anchored force and determine anchorage depth, require to go deep into minimum fresh scar 5 meters;
(2) carry out prestress anchoraging immediately after boring, if the interval long period, then need anchoring after hole flushing;
(3) by anchor cable measure on request, and suppress anchor end, arrange by aperture and fix anchor cable position, in lower hand-hole;
(4) configure Anchor Agent, 700r/m stirs 1 ~ 3 minute; Described Anchor Agent comprises the raw material of following weight portion:
(5) Anchor Agent grouting pump is poured in anchor hole, if anchoring in water burst hole or circulating water, need with Chinese patent " being convenient to the device of prestressed cable anchorage " ZL200820072081.6 supplementary anchorage;
(3) anti-corrosion protection slurry is filled with after stretch-draw,
Described anti-corrosion protection slurry comprises the raw material of following weight portion:
General purpose portland cement PO32.5 1000 parts,
350 parts, water,
Animal migration resistance rust material 10 parts
(4) stretching end sealing off and covering anchorage, sealing off and covering anchorage concrete is identical with ordinary concrete casting method;
Described anticorrosion sealing off and covering anchorage concrete material comprises the raw material of following weight portion:
Embodiment 2
Power station requires to increase by 2.5 meters, head.By design procedure of the present invention:
(i) determine: gravity overfall dam increases gate scheme, need anchoring anchor cable 15 to restraint as calculated, for solving additional bending moment and shearing, open miter angle hole, anchorage depth 27 meters, construction period hydropower station, outside water burst in hole in the middle part of overfall dam, construction period band water is constructed;
Gate pier prestress anchoraging, increases gate height, and every gate pier needs 6 bundle prestress anchorage cables, adopts slot treatment gate pier, and carries out bar planting, formed in conjunction with prestressed gate pier;
(2) Underwater Deep-hole prestress anchoraging
(1) adopt rig punching, aperture, calculate according to anchored force and determine anchorage depth;
(2) carry out prestress anchoraging immediately after boring, if the interval long period, then need anchoring after hole flushing;
(3) by anchor cable measure on request, and suppress anchor end, arrange by aperture and fix anchor cable position, in lower hand-hole;
(4) configure Anchor Agent, 700r/m stirs 1 ~ 3 minute;
Described Anchor Agent comprises the raw material of following weight portion:
(5) Anchor Agent grouting pump is poured in anchor hole, if anchoring in water burst hole or circulating water, need with Chinese patent " being convenient to the device of prestressed cable anchorage ", ZL200820072081.6 supplementary anchorage;
(3) anti-corrosion protection slurry is filled with after stretch-draw,
Described anti-corrosion protection slurry comprises the raw material of following weight portion:
(4) stretching end sealing off and covering anchorage, sealing off and covering anchorage concrete is identical with ordinary concrete casting method;
Described anticorrosion sealing off and covering anchorage concrete material comprises the raw material of following weight portion:
Embodiment 3
Service reservoir requires to increase water requirement, needs to increase water level 2.5 meters, winter construction.By step of the present invention:
(i) determine: flood spillway overflow retaining gate height increases by 2.5 meters; As calculated, every hole gate pier needs anchoring anchor cable 6 to restraint, and is fan-shaped layout, opens 25 ~ 60 degree of corner apertures in gate pier, anchorage length 17 ~ 23 meters, for ensureing that Second Year supplies water, construction period winter construction;
Gate pier prestress anchoraging, for increasing gate height, every gate pier needs 6 bundle prestress anchorage cables;
(2) Underwater Deep-hole prestress anchoraging
(1) adopt rig punching, aperture, calculate according to anchored force and determine anchorage depth;
(2) carry out prestress anchoraging immediately after boring, if the interval long period, then need anchoring after hole flushing;
(3) by anchor cable measure on request, and suppress anchor end, arrange by aperture and fix anchor cable position, in lower hand-hole;
(4) configure Anchor Agent, 700r/m stirs 1 ~ 3 minute;
Described Anchor Agent comprises the raw material of following weight portion:
(5) Anchor Agent grouting pump is poured in anchor hole, if anchoring in water burst hole or circulating water, need with Chinese patent " being convenient to the device of prestressed cable anchorage " supplementary anchorage;
(3) anti-corrosion protection slurry is filled with after stretch-draw,
Described anti-corrosion protection slurry comprises the raw material of following weight portion:
(4) stretching end sealing off and covering anchorage, sealing off and covering anchorage concrete is identical with ordinary concrete casting method;
Described anticorrosion sealing off and covering anchorage concrete material comprises the raw material of following weight portion:
Claims (1)
1. gravity overfall dam directly adds or increases a method for gate, it is characterized in that: comprise the following steps:
(1) design
According to the height that will increase head, that determines overfall dam gate increases height or the height of newly-increased gate, this increase after gate or the height of newly-increased gate be less than 7 meters;
For originally having pedestrian bridge or access bridge bridge pier and not having the overfall dam of gate, adopt and People's Bank of China's bridge pier is modified as gate pier, carry out setting up gate: calculate the structural safety of overfall dam and undertaken by existing software for calculation, comprise and carry out slide, overturning or slip resistance analysis calculating, require that dam body does not produce tensile stress; For the overfall dam of original pedestrian bridge or access bridge bridge pier, the mode determining its structural adjustment structure is calculated by structural-load-carrying capacity, the additional moment that the pressure of gate transmission produces is born in conjunction with the anchor bar concrete structure after bar planting of slotting in weir by prestressing force, shearing is born by improved gate pier structure, anchored force is structural calculation routinely, computation structure bar planting;
There is gate for former overfall dam, then carry out gate and increase: for original gate pier, calculated the mode determining its structural adjustment structure by structural-load-carrying capacity, adopt slot treatment gate pier, and carry out bar planting, formed in conjunction with prestressed gate pier;
(2) Underwater Deep-hole prestress anchoraging
(1) adopt rig punching, aperture, calculate according to anchored force and determine anchorage depth, require that going deep into minimum fresh scar is not less than 2 meters;
(2) carry out prestress anchoraging immediately after boring, if the interval long period, then need anchoring after hole flushing;
(3) by anchor cable measure on request, and suppress anchor end, arrange by aperture and fix anchor cable position, in lower hand-hole;
(4) configure Anchor Agent, 700r/m stirs 1 ~ 3 minute;
Described Anchor Agent comprises the raw material of following weight portion:
SILICA FUME, SiO
2content 83-96%, specific area 300 ~ 400m
2/ kg, 0 ~ 100 part;
(5) Anchor Agent grouting pump is poured in anchor hole, if anchoring in water burst hole or circulating water, need with Chinese patent " being convenient to the device of prestressed cable anchorage " supplementary anchorage;
(3) anti-corrosion protection slurry is filled with after stretch-draw,
Described anti-corrosion protection slurry comprises the raw material of following weight portion:
(4) stretching end sealing off and covering anchorage, sealing off and covering anchorage concrete is identical with ordinary concrete casting method;
Anticorrosion sealing off and covering anchorage concrete material comprises the raw material of following weight portion:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310532612.0A CN103526728B (en) | 2013-11-03 | 2013-11-03 | A kind of gravity overfall dam directly adds or increases the method for gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310532612.0A CN103526728B (en) | 2013-11-03 | 2013-11-03 | A kind of gravity overfall dam directly adds or increases the method for gate |
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| Publication Number | Publication Date |
|---|---|
| CN103526728A CN103526728A (en) | 2014-01-22 |
| CN103526728B true CN103526728B (en) | 2015-08-12 |
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| CN201310532612.0A Active CN103526728B (en) | 2013-11-03 | 2013-11-03 | A kind of gravity overfall dam directly adds or increases the method for gate |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050028088A (en) * | 2003-09-17 | 2005-03-22 | 홍재욱 | The method of controlling a water level using a floating body |
| CN101994306A (en) * | 2010-10-22 | 2011-03-30 | 吉林省水利科学研究院 | Hydraulic concrete surface layer slit sealing method |
| CN201857603U (en) * | 2010-09-02 | 2011-06-08 | 广东省水利电力勘测设计研究院 | Heightened gravity dam |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5173988B2 (en) * | 2009-11-12 | 2013-04-03 | 中部電力株式会社 | Seismic improvement structure of existing sluice pillar and coupled earthquake resistant structure |
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2013
- 2013-11-03 CN CN201310532612.0A patent/CN103526728B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050028088A (en) * | 2003-09-17 | 2005-03-22 | 홍재욱 | The method of controlling a water level using a floating body |
| CN201857603U (en) * | 2010-09-02 | 2011-06-08 | 广东省水利电力勘测设计研究院 | Heightened gravity dam |
| CN101994306A (en) * | 2010-10-22 | 2011-03-30 | 吉林省水利科学研究院 | Hydraulic concrete surface layer slit sealing method |
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| CN103526728A (en) | 2014-01-22 |
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Owner name: JILIN YINHE WATER RESOURCES AND HYDROPOWER NEW TEC Free format text: FORMER OWNER: WATER RESOURCES RESEARCH INSTITUTE OF JILIN PROVINCE Effective date: 20150701 |
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Effective date of registration: 20150701 Address after: 130022 Jilin City, Changchun province people's street, No. 8220 Applicant after: Jilin Yinhe Water Resources And Hydropower New Technology Co., Ltd. Address before: 130023 No. 8220 Renmin Street, Jilin, Changchun Applicant before: Jilin Academy of Water Resources |
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