CN205711985U - The reparation structure of severe cold area morbid state concrete gravity dam - Google Patents
The reparation structure of severe cold area morbid state concrete gravity dam Download PDFInfo
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- CN205711985U CN205711985U CN201620399322.2U CN201620399322U CN205711985U CN 205711985 U CN205711985 U CN 205711985U CN 201620399322 U CN201620399322 U CN 201620399322U CN 205711985 U CN205711985 U CN 205711985U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
This utility model relates to the reparation structure of a kind of severe cold area morbid state concrete gravity dam.The purpose of this utility model is to provide a kind of simple in construction, easy construction, the reparation structure of safe and reliable severe cold area morbid state concrete gravity dam.The technical solution of the utility model is: the reparation structure of a kind of severe cold area morbid state concrete gravity dam, for repairing the concrete gravity dam dam body poor part of upstream face barrier performance, on the upstream face of dam body, the poor beneath portions of barrier performance arranges cattle lower limb, above bracket, the concrete protection plate covering dam body upstream face being spliced to form by some concrete precast block joinings it is provided with at a certain distance from dam body upstream face, concrete protection plate lower end is supported on bracket, one layer of asphalt concrete seepage prevention plate it is provided with between described concrete protection plate and dam body, asphalt concrete seepage prevention plate lower end is supported on bracket.This utility model is applicable to the similar engineerings such as the structure repair of the ill concrete gravity dam of severe cold area below height of dam 50m.
Description
Technical field
This utility model relates to the reparation structure of a kind of severe cold area morbid state concrete gravity dam.It is applicable to dam, severe cold area
The similar engineerings such as the structure repair of the ill concrete gravity dam of high below 50m.
Background technology
Gravity dam is one of dam type of occurring the most the earliest, due to its feature such as simple in construction, easy construction, in the world
The a large amount of design and construction in various places.In the early days of foundation, for solving urban water problem, China has built and a collection of with concrete gravity dam has been
The water supply project of water retaining structure, through the operation of more than 60 years, has occurred in that problems, it would be highly desirable to repair, especially
It it is the concrete gravity dam of severe cold area, northeast.Gravity dam under these adverse weather conditions after the operation of more than 60 years,
All there is catabiosis in various degree, dam body starts infiltration occur, and winter, downstream dam facing had icing, caused downstream dam facing freeze thawing
Damage.
For understanding dam body infiltration situation, geological mapping department carries out water pressure test in borehole, setting-out to about ten dams
Result of the test shows: part dam monolith permeability rate is less, and between 1～5Lu, but the permeability rate of part dam body monolith local reaches
36～48Lu.Packer permeability test achievement and make an on-the-spot survey discovery on the spot: under the conditions of ordinary water level, the seepage of dam body itself is serious, and leads
Wanting seepage to occur at expansion joint and horizontal construction joint, reason is that these reservoirs are built relatively early, is limited by construction technology at that time,
The sealing at expansion joint the most gradually ageing failure, and horizontal construction joint is all not handled by, therefore expansion joint and horizontal construction joint go out
Now seep water phenomenon, the dam body of both sides in gradually corrosion of seeping water seam, freezes in the winter time and produces bigger lateral ice pressure, make seam in seam
Gap is gradually increased, and water percolating capacity increases, and defines the most serious Seepage.
Summary of the invention
The technical problems to be solved in the utility model is: for the problem of above-mentioned existence, it is provided that a kind of simple in construction, construction
The reparation structure of convenient, safe and reliable severe cold area morbid state concrete gravity dam.
This utility model be the technical scheme is that the reparation structure of a kind of severe cold area morbid state concrete gravity dam,
For repairing the concrete gravity dam dam body poor part of upstream face barrier performance, it is characterised in that: on the upstream face of dam body, prevent
Ooze poor-performing beneath portions and bracket be set, if above bracket, be provided with by dry concrete at a certain distance from dam body upstream face pre-
The concrete protection plate covering dam body upstream face that clamp dog joining is spliced to form, concrete protection plate lower end is supported on bracket,
Being provided with one layer of asphalt concrete seepage prevention plate between described concrete protection plate and dam body, asphalt concrete seepage prevention plate lower end is supported in
On bracket.
The described concrete precast block dam body joint bar through being embedded on dam body upstream face connects dam body.
Described dam body joint bar one end is plugged in dam body, and the other end exposes outside dam body, and dam body joint bar bared end is shaped with
Crotch upwards, described concrete precast block is provided with suspension ring, and concrete precast block hangs on the crotch of dam body joint bar through suspension ring.
The tongue and groove being easy to concrete precast block with concrete precast block joining splicing it is shaped with on described concrete precast block.
On described concrete protection plate, the gap 1:1 cement mortar between concrete precast block and concrete precast block hooks
Seam.
The thickness of described asphalt concrete seepage prevention plate is 0.1～0.2m.
The length of described concrete precast block is generous is respectively 2m, 1m and 0.1m.
The method for repairing and constructing of a kind of severe cold area morbid state concrete gravity dam, it is characterised in that step is as follows:
S1, mud dig clearly: excavate the mud in dam body upstream face front；
S2, dam facing dabbing and cleaning: dam body upstream face carries out dabbing and cleaning, and dabbing severity control is at about 1cm；
S3, bracket is set: pour the bracket connecting dam body in dam body upstream face bottom；
S4, layout dam body joint bar: uniformly bury some dam body joint bars on dam body upstream face underground, and dam body joint bar one end is exposed
Outside dam body upstream face；
S5, concrete protection plate and the construction of asphalt concrete seepage prevention plate: on bracket, from bottom to top layering overlaps concrete
Prefabricated section, until concrete precast block overlap joint forms the concrete protection plate covering dam body upstream face, concrete precast block and phase
The dam body joint bar answered connects fixing；Often at concrete precast block layer and the dam body of new overlap joint after overlap joint 1～3 layer concrete prefabricated sections
Bituminous concrete is poured between upstream face；
S6, the gap processed on concrete protection plate: concrete precast block and concrete precast block on concrete protection plate
Between gap pointing with cement mortar.
Step S5 method is as follows
S51, on bracket, at a certain distance from dam body upstream face joining splicing 1～3 layer concrete prefabricated sections, concrete
Prefabricated section connects fixing with corresponding dam body joint bar；
S52, between concrete precast block layer and the dam body upstream face that joining is spliced to form, pour bituminous concrete；
S53, joining splicing concrete precast block on continue overlap joint 1～3 layer concrete prefabricated sections, concrete prefabricated
Block connects fixing with corresponding dam body joint bar；
S54, between concrete precast block layer and the dam body upstream face that new joining is spliced to form, pour bituminous concrete；
S55, repetition step S53 and step S54 are until concrete precast block snaps into dam body tip position and Colophonium coagulation
Soil is poured into dam body tip position.
Temperature when described bituminous concrete pours controls at 150～185 DEG C.
The beneficial effects of the utility model are: this utility model is spliced into concrete protection by concrete precast block joining
Plate, bound bitumen concrete realizes antiseepage reparation to dam body, good seepage-proof property, and adaptive deformation ability is strong, structure design is simple,
Construct convenient, safe and reliable, there is stronger practicality.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment.
Fig. 2 is the enlarged diagram in A portion in Fig. 1.
Fig. 3 is the enlarged diagram in B portion in Fig. 2.
Fig. 4 is the schematic diagram of dam body upstream face in embodiment.
Detailed description of the invention
As shown in Figure 1 to 4, the present embodiment is the reparation structure of a kind of severe cold area morbid state concrete gravity dam, on dam
On the upstream face of body 2, barrier performance poor beneath portions bracket 3 is set, bracket 3 is top concrete protection plate, Colophonium coagulation
The supporter of soil barrier sheet 9.
This example above bracket 3, with a certain distance from dam body 2 upstream face (0.1m～0.2m) if place is provided with by dry concrete pre-
The concrete protection plate covering dam body 2 upstream face that clamp dog 6 joining is spliced to form, concrete precast block 6 is shaped with and is easy to coagulation
The tongue and groove 7 that soil prefabricated section 6 splices with concrete precast block 6 joining, concrete precast block 6 is through being embedded on dam body 2 upstream face
Dam body joint bar 5 connects dam body 2.Dam body joint bar 5 one end is plugged in dam body 2, and the other end exposes outside dam body 2, and dam body joint bar 5
Bared end is shaped with crotch upwards.Concrete precast block 6 is provided with suspension ring, and concrete precast block 6 hangs over dam body joint bar 5 through suspension ring
Crotch on, suspension ring are welded and fixed with crotch.Seam between concrete precast block 6 and concrete precast block on concrete protection plate
Gap 1:1 pointing with cement mortar.
Between concrete protection plate and dam body 2 upstream face, be provided with one layer of asphalt concrete seepage prevention plate 9, thickness be 0.1～
0.2m。
The concrete construction method of the present embodiment is as follows:
S01, mud dig clearly: as the leakage preventing structure of morbid state concrete gravity dam dam body 2, asphalt concrete seepage prevention plate 9 one
As should go deep into bedrock surface once 1～3m, but in view of reservoir after running for many years, before dam, mud 1 deposits relatively deep, and it is whole
Excavate more difficulty, and mud 1 itself has antiseepage effect.Therefore, in actual design, asphalt concrete seepage prevention plate 9 need not
Going deep into below the dam foundation, only need to the part of mud before dam 1 surface anti-seepage poor-performing be removed, cutting depth is generally according to 1
～2m controls, the gradient of excavation should meet the requirement that construction area is stable.If in implementation process, find deposit barrier properties before dam
Energy is poor, and (infiltration coefficient is more than 1 × 10-3Cm/s), then needing all to remove deposit before dam, asphalt concrete seepage prevention plate 9 should
Go deep into below basement rock 1～3m.
S02, dam facing dabbing and cleaning: for making the concrete again poured, bituminous concrete effectively be combined with dam body 2,
Before carrying out following technique, dam body 2 upstream face need to carry out dabbing and cleaning, dabbing severity control meets water at about 1cm, dam body 2
Face cleaning includes removing surface mud, deposit, the concrete etc. of ageing failure.
S03, bracket 3 is set: bracket 3 is top concrete protection plate, the supporter of asphalt concrete seepage prevention plate 9, therefore
Its stability is particularly important for the repairing effect of whole morbid state gravity dam dam body 2.By laying cattle between bracket 3 and dam body 2
Lower limb joint bar 4 links together, and the specification of bracket joint bar 4, spacing, length should be calculated by load and determine, generally bracket
Joint bar 4 uses and is not less thanReinforcing bar, spacing are 50～80cm, length is not less than 5m.
The operational procedure using " assigning muscle after first slip casting " installed by bracket joint bar 4.The cement mortar injected uses No. 525 silicon
Acid salt cement, sand particle diameter is not more than 2.5mm, clay content < 0.9%, must sieve before using.Slip casting turgor in joint bar hole is root
After inserting according to bracket joint bar 4, whether mortar is extruded aperture to check the compaction rate of mortar, should extract cattle if undesirable
Lower limb joint bar 4 supplementary irrigation mortar.In site operation, the construction quality of bracket joint bar 4 strictly be controlled, pullout tests to be done, test
Content, requirement etc. should meet " Code for design of building " GB50007-2002, should meet structure stress requirement simultaneously.
Bracket joint bar 4 should be with the structure reinforcing bars firm welding of bracket 3, and the physical dimension of bracket 3 requires construction according to design.
After the intensity of bracket 3 concrete reaches design requirement, the construction of superstructure can be carried out.
S04, layout dam body joint bar 5: for fixing concrete prefabricated section 6, on dam body 2 upstream face, bury dam body joint bar 5 underground.
Dam body joint bar 5 and horizontal plane angle be θ degree and in dam inclined downward, in order to grouting, dam body joint bar 5 section of stretching out in level and is made
Have upwards, crotch that concrete precast block 6 upper lift ring hanging concrete prefabricated section 6 can be coordinated.Generally dam body joint bar 5
Diameter is not less thanReinforcing bar, length are not less than 1.5m.5 array pitch of dam body joint bar are relative with the suspension ring on concrete precast block 6
Should, the grout injection control of dam body joint bar 5 is identical with the requirement of bracket joint bar 4.
S05, concrete protection plate and asphalt concrete seepage prevention plate 9 are constructed: on bracket 3, from bottom to top layering overlaps coagulation
Soil prefabricated section 6, until concrete precast block 6 overlap joint forms the concrete protection plate covering dam body 2 upstream face；Often overlap joint 2 layers mixes
Between concrete precast block layer and dam body 2 upstream face of new overlap joint, bituminous concrete is poured after solidifying soil prefabricated section 6；
S051, on bracket 3, away from dam body 2 upstream face 0.1m～0.2m joining splice 2 layer concrete prefabricated sections 6, coagulation
Soil prefabricated section 6 connects fixing with corresponding dam body joint bar 5；
S052, between concrete precast block layer and dam body 2 upstream face that joining is spliced to form, pour bituminous concrete；
S053, joining splicing concrete precast block 6 on continue overlap joint 2 layer concrete prefabricated sections 6, concrete prefabricated
Block 6 connects fixing with corresponding dam body joint bar 5；
S054, between concrete precast block layer and dam body 2 upstream face that new joining is spliced to form, pour bituminous concrete；
S055, repetition step S053 and step S054 are until concrete precast block 6 snaps into dam body 2 tip position, and drip
Blue or green concreting, to dam body 2 tip position, forms the asphalt concrete seepage prevention plate 9 covering dam body upstream face.
Concrete precast block 6 uses precast construction, physical dimension B × H × D (length × width x thickness) be respectively 2m, 1m,
0.1m, principal rod is respectively adopted with distributing reinforcementSpacing is 20cm.Lap-joint between concrete precast block 6,
The a width of 0.4D of tongue and groove 7, degree of depth 0.4D.Conscientiously to check its quality before concrete precast block 6 is installed, emphasis checks overall size
Whether meet design requirement, remove its inner surface attachment, and uniformly painting brushes adhesive bitument primer, in addition it is also necessary to having installed and having treated
Install concrete precast block 6 side up and down, the particularly adhesion inside tongue and groove 7 is rooted out totally, with reduce gap with
Produce and cumulative errors are installed.
The suspension ring of concrete precast block 6 to be directed at dam body joint bar 5 and weld.There is dam body joint bar 5 and concrete precast block 6
On suspension ring to when not going up, use to be welded with and connect the way of reinforcing bar to make concrete precast block 6 install firm.The concrete installed is pre-
Clamp dog 6 surface is smooth, and plate seam to align up and down, must not be out of shape, overlaps the goodness of fit and control within 5mm between prefabricated section.
The aggregate of bituminous concrete and filler should meet table 1～the requirement of table 3, and bituminous concrete mixture should meet table 4
Technology requirement.
The technology requirement of table 1 coarse aggregate
| Sequence number | Project | Unit | Index | Explanation |
| 1 | Apparent density | g/cm3 | ≥2.6 | |
| 2 | With asphalt adhesion | Level | ≥4 | Water-boiling method |
| 3 | Flat-elongated particles content | % | ≤25 | |
| 4 | Crush values | % | ≤30 | Pressure 400kN |
| 5 | Water absorption rate | % | ≤2 | |
| 6 | Clay content | % | ≤0.5 | |
| 7 | Durability | % | ≤12 | The mass loss that sodium sulfate drying and watering cycle is 5 times |
The technology requirement of table 2 fine aggregate
| Sequence number | Project | Unit | Index | Explanation |
| 1 | Apparent density | g/cm3 | ≥2.55 | |
| 2 | Water absorption rate | % | ≤2 | |
| 3 | Water stablizes grade | Level | ≥6 | Sodium carbonate solution boils 1min. |
| 4 | Durability | % | ≤15 | The weight loss that sodium sulfate drying and watering cycle is 5 times |
| 5 | Organic matter and earth content | % | ≤2 |
The technology requirement of table 3 filler
The technology requirement of table 4 bituminous concrete
During asphalt concrete construction, heated bitumen should be added and mixes and stirs together first by aggregate and filler dry mixing 15～25s,
Asking uniform mixing, Colophonium to wrap aggregate good, the rate of wrapping should reach more than 95%.Asphalt mix and stir after out-of-machine temperature,
Its temperature after the thermal loss such as transport should be made to meet the requirement of placing temperature.If special messenger measures going out of bituminous concrete
Machine temperature regulates the amount of fuel of nozzle in time, controls mineral heating up temperature according to temperature Change, it is ensured that bituminous concrete goes out machine temperature
Degree reaches requirement.
The molding temperature of bituminous concrete should control between 150～185 DEG C, as dripped when molding temperature is below 140 DEG C
Blue or green concrete can cohere agglomerating, and mobility is very poor, otherwise as molding temperature there will be smoke event more than 200 DEG C, it is impossible to lean on
Deadweight is shakeout, and should be used as defective process and discards.Bituminous concrete is had no progeny between pouring again on the bituminous concrete poured
When continuing to pour, original bituminous concrete surface to be cleaned out, remove the dust on bituminous concrete surface and foreign material, can
Pour next layer.The lift joint of bituminous concrete wants the horizontal joint face between concrete precast block layer to stagger, every layer of drip
The blue or green uppermost lift joint of concrete to be less than corresponding concrete precast block layer apical margin 5～10cm, and remainder treats top
After concrete precast block 6 is installed, then pour bituminous concrete.
S06, the gap processed on concrete protection plate: on concrete protection plate, concrete precast block 6 is with concrete prefabricated
Gap between block 6, with 1: 1 pointing with cement mortar, will block the approach of leaking outside, and plate stitches smooth and beautiful appearance to be smeared.
Claims (7)
1. a reparation structure for severe cold area morbid state concrete gravity dam, is used for repairing concrete gravity dam dam body (2) and meets water
The poor part of face barrier performance, it is characterised in that: on the upstream face of dam body (2), barrier performance poor beneath portions cattle is set
Lower limb (3), above bracket (3), is provided with at a certain distance from dam body (2) upstream face and is spliced by some concrete precast blocks (6) joining
The concrete protection plate of covering dam body (2) upstream face formed, concrete protection plate lower end is supported on bracket (3), described mixed
Being provided with one layer of asphalt concrete seepage prevention plate (9) between solidifying soil protective plate and dam body (2), asphalt concrete seepage prevention plate (9) lower end is propped up
Support on bracket (3).
The reparation structure of severe cold area the most according to claim 1 morbid state concrete gravity dam, it is characterised in that: described mixed
Solidifying soil prefabricated section (6) the dam body joint bar (5) through being embedded on dam body (2) upstream face connects dam body (2).
The reparation structure of severe cold area the most according to claim 2 morbid state concrete gravity dam, it is characterised in that: described dam
In body joint bar (5) one end is plugged in dam body (2), the other end exposes at dam body (2) outward, and dam body joint bar (5) bared end be shaped with to
On crotch, described concrete precast block (6) is provided with suspension ring, and concrete precast block (6) hangs over dam body joint bar (5) through suspension ring
On crotch.
The reparation structure of severe cold area the most according to claim 1 morbid state concrete gravity dam, it is characterised in that: described mixed
The tongue and groove (7) being easy to concrete precast block (6) with concrete precast block (6) joining splicing it is shaped with on solidifying soil prefabricated section (6).
5. according to the reparation structure of the severe cold area morbid state concrete gravity dam described in claim 1 or 4, it is characterised in that: institute
State the gap 1:1 pointing with cement mortar between concrete precast block (6) and concrete precast block on concrete protection plate.
The reparation structure of severe cold area the most according to claim 1 morbid state concrete gravity dam, it is characterised in that: described drip
The thickness of blue or green concrete anti-seepage plate (9) is 0.1～0.2m.
The reparation structure of severe cold area the most according to claim 1 morbid state concrete gravity dam, it is characterised in that: described mixed
The length of solidifying soil prefabricated section (6) is generous is respectively 2m, 1m and 0.1m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620399322.2U CN205711985U (en) | 2016-05-05 | 2016-05-05 | The reparation structure of severe cold area morbid state concrete gravity dam |
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|---|---|---|---|
| CN201620399322.2U CN205711985U (en) | 2016-05-05 | 2016-05-05 | The reparation structure of severe cold area morbid state concrete gravity dam |
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| CN205711985U true CN205711985U (en) | 2016-11-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735206A (en) * | 2016-05-05 | 2016-07-06 | 中国电建集团华东勘测设计研究院有限公司 | Repair structure and construction method of pathological concrete gravity dam in severe cold area |
| CN114718021A (en) * | 2022-05-10 | 2022-07-08 | 长江勘测规划设计研究有限责任公司 | Construction method for rapidly reconstructing upstream dam face seepage-proofing body structure of stone-laying dam |
-
2016
- 2016-05-05 CN CN201620399322.2U patent/CN205711985U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735206A (en) * | 2016-05-05 | 2016-07-06 | 中国电建集团华东勘测设计研究院有限公司 | Repair structure and construction method of pathological concrete gravity dam in severe cold area |
| CN114718021A (en) * | 2022-05-10 | 2022-07-08 | 长江勘测规划设计研究有限责任公司 | Construction method for rapidly reconstructing upstream dam face seepage-proofing body structure of stone-laying dam |
| CN114718021B (en) * | 2022-05-10 | 2023-05-26 | 长江勘测规划设计研究有限责任公司 | Construction method for rapidly reconstructing seepage-proofing body structure of upstream dam face of stone-building dam |
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