CN105089023A - Hydropower house concrete bottom plate improvement method and structure thereof - Google Patents
Hydropower house concrete bottom plate improvement method and structure thereof Download PDFInfo
- Publication number
- CN105089023A CN105089023A CN201510174654.0A CN201510174654A CN105089023A CN 105089023 A CN105089023 A CN 105089023A CN 201510174654 A CN201510174654 A CN 201510174654A CN 105089023 A CN105089023 A CN 105089023A
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- concrete
- ell
- buttress
- base plate
- bottom plate
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Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 239000004743 Polypropylene Substances 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 7
- -1 polypropylene Polymers 0.000 claims abstract description 7
- 229920001155 polypropylene Polymers 0.000 claims abstract description 7
- 238000009412 basement excavation Methods 0.000 claims abstract description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 230000002787 reinforcement Effects 0.000 claims description 14
- 239000008267 milk Substances 0.000 claims description 4
- 210000004080 milk Anatomy 0.000 claims description 4
- 235000013336 milk Nutrition 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000007596 consolidation process Methods 0.000 abstract description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 3
- 229910000746 Structural steel Inorganic materials 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 11
- 239000011435 rock Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000012946 outsourcing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002362 mulch Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/50—Hydropower in dwellings
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a method for improving a concrete bottom plate of a hydropower house and a structure thereof, wherein secondary concrete is not arranged after the bottom plate of the hydropower house is excavated, polypropylene fiber concrete is sprayed for leveling, foundation dowels are arranged on the bottom plate and the side wall of an excavation machine pit of an elbow section and are used as ground anchors to be connected with elbow steel lining anchor, and foundation dowels are arranged at elbow buttresses and are connected with elbow buttress vertical steel bars; then carrying out uncovered heavy grouting on the leveling layer; and firstly, paving bottom reinforcing steel bars of the bottom plate, then paving buttress reinforcing steel bars, then pouring buttress structure concrete, hoisting the elbow steel lining after the concrete is aged, binding outer-layer reinforcing steel bars of the elbow steel lining after the elbow steel lining is installed, and finally pouring bottom plate structure concrete. The invention adopts the modes of spraying and leveling concrete, uncovered heavy consolidation grouting and structural concrete, saves a large amount of structural steel bars and connecting joint bars at the parting position of the first-stage concrete and the second-stage concrete, and has obvious economic benefit.
Description
Technical field
The present invention relates to a kind of powerhouse of hydropower station concrete floor to improve one's methods and structure, belong to Hydraulic and Hydro-Power Engineering technical field.
Background technology
Draft tube is one of major bearing structures of powerhouse of hydropower station, is divided into Taper Pipe section, ell section and diffuser three part, and the base plate of ell section is also the base plate of factory building simultaneously.The pattern of current powerhouse of hydropower station base plate many employings first phase structural concrete lid weight+consolidation grouting+ell bottom second phase structural concrete.
Conventional factory building base plate has the heavy consolidation grouting of lid to need first to build the thick first phase structural concrete lid weight of 0.8m ~ 1.5m, after its intensity reaches more than 50% design strength, carry out consolidation grouting construction again.Owing to just having enough coagulation earth mulch weights when being in the milk, can grouting pressure be improved, top layer basement rock also can be in the milk with higher pressure, and need not worry batholith is lifted; Lid high density concrete has also stitched ponding to spillage rock while playing ballast effect to top layer rock mass, even if to have leapt up out slurry from concrete and basement rock contact surface, also can play contact grouting to this contact surface.But this grouting will account for pressure concrete pouring bin number, the straight line duration 20d ~ 40d that generally will affect concreting is not etc.; Particularly when concrete pouring bin face is few, impact will be larger, for the construction organization of engineering and execution control totally unfavorable; And when grouting construction concrete surface open-assembly time long; Be subject to the anticracking that there's a sudden fall in temperature totally unfavorable to rock concrete in restraint area block anticracking and exposed surface.
In addition, be ensure the globality of structure, formerly watering, block and first phase lid weight structure concrete construction joint face still need adds joint bar and is combined well with structural concrete the second stage of bottom ell.And for bearing construction period external water pressure and working load, first phase lid high density concrete levels all needs to configure a large amount of structure reinforcing bars, and it is less to weigh underplate concrete gap with first phase lid bottom ell, and the diameter of ell own is larger, outsourcing reinforcing bar is intensive, human users's narrow space, reinforcing bar system is pacified, concreting is all more difficult.
Existing concrete backplane technology complex structure as can be seen here, constructs not easily and expense material of taking a lot of work, is necessary to improve to reduce difficulty of construction to its structure, reduces cost.
Summary of the invention
The object of the invention is for solving existing concrete backplane technology complex structure, constructing not easily and the technical problem of expense material of taking a lot of work, providing a kind of powerhouse of hydropower station concrete floor to improve one's methods and structure.
The present invention first proposed a kind of powerhouse of hydropower station concrete floor and improves one's methods, the method is such: do not arrange second stage concrete after powerhouse of hydropower station base plate has excavated, spray 10cm ~ 20cm thick C25 polypropylene fiber concrete carries out levelling, and basic joint bar is all set with sidewall draws anchor to be connected as earth anchor with ell steel lining at ell section backactor hole base plate, basic joint bar is set at ell buttress position and is connected with ell buttress vertical reinforcement; Then on leveling layer, carry out uncovered be heavily in the milk; First lay base plate bottom layer reinforcing bar and re-lay buttress reinforcing bar, build with after-pouring buttress structural concrete, lift ell steel lining after reaching the age of concrete and after installing, carry out the colligation of ell steel lining outer reinforcement, finally building base arrangement concrete.
Should carry out experimental grouting before aforementioned nongravity capping concretion grouting construction, the concrete condition such as size, stretching degree, concrete castability according to rock cranny adopts different grouting segment lengths and pressure.Boring on request point sequence, segmentation is carried out, and the biased difference in hole is not more than 10cm; Bore flushing divides hole wall to rinse and crack is rinsed, and crack is rinsed and adopted high-low pressure pulsation to rinse, and flushing pressure generally adopts the grouting pressure of 80%, and pressure adopts 1MPa more than during 1MPa.
The thick polypropylene fibre leveling concrete of aforementioned spray 10 ~ 20cm act as plasma resistance cover plate, grouting works on the cover board carries out, mainly block surface of bedrock crack, prevent slurries string from emitting, ensure grouting quality, create construction environment, exempt discarded slurries to the pollution of foundation plane, reduce the removing difficulty of foundation plane.Grouting pressure can not be too large, namely plasma resistance cover plate can not be lifted.
Aforementioned ell section machine hole base plate and sidewall all arrange basic joint bar and act as fixing ell steel lining and provide anchoring fulcrum, be weldingly connected, and improve concrete and basement rock adhesion with ell grasp, anchor ring etc. by lacing wire.
Aforementioned concrete buttress act as installation steel lining and provides fulcrum, and top arranges jack.
Aforementioned ell steel lining is distributor, and ell outsourcing reinforcing bar and the second stage of structural concrete top reinforcement act as and bear internal water pressure.
Aforementioned concrete buttress reinforcing bar act as and bears the steel lining such as ell, Taper Pipe load, and a pier foundation joint bar plays anchorage effect, reinforcement welding inner with buttress.
Aforementioned ell should regulate levelling before installing pouring concrete, be welded into one by buttress top jack etc. after meeting installation requirement with ell, Taper Pipe; All grasps, anchor ring all welds before concreting, and by lacing wire and basic joint bar welded together; During concreting, Taper Pipe and ell planted agent arrange that enough reinforcements support, and the height of each fluid concrete must not be greater than 700mm.
Aforementioned draft tube mat foundation counter-force calculates by Beams on Elastic Foundation to be determined, consider the even of power transmission and reduce early stage temperature shrinkage fracture, generally must arrange reinforcing bar within the scope of whole base plate, the quantity of reinforcing bar needs configuration according to the calculating of ell section and diffuser base plate.
The present invention also been proposed the powerhouse of hydropower station Concrete bottom plate structure improved based on said method, and it is such: it mainly comprises the leveling concrete, nongravity capping concretion grouting on leveling layer and the base arrangement concrete that are sprayed on base plate; Described leveling concrete is polypropylene fiber concrete; In addition, at ell section backactor hole base plate, basic joint bar is all set with sidewall and draws anchor to be connected as earth anchor with ell steel lining, basic joint bar is set at ell buttress position and is connected with ell buttress vertical reinforcement.
Further, the grouting hole depth 3m of base plate nongravity capping concretion grouting, blossom type is arranged, an array pitch 3mx3m.Constructed the rear construction just carrying out II sequence hole in I sequence hole, its unit water absorption rate w≤0.03lu.
Should be good by the colligation in advance of buttress position by base plate bit architecture reinforcing bar before it should be noted that the concreting of base plate ell.That fixes when base plate ell is installed draws anchor position to put to be as the criterion with corresponding dynamo-electric drawing.
The invention has the beneficial effects as follows:
The present invention adopts the pattern of spray leveling concrete+nongravity capping concretion grouting+structural concrete, solves the contradiction that consolidation grouting and concreting are disturbed mutually, accelerates construction speed; Avoid lifting and difficult treatment of the heavy consolidation grouting cover plate of lid; Be easy to string, the grout problem of observing rock surface, be convenient to timely process; Avoid boring the component such as cooling water pipe, steel bar stress, tester buried underground in bad concrete; Save the expense of direct drilling concrete or pre-buried conduit.The more important thing is a large amount of structure reinforcing bars of saving fist stage concrete and second stage concrete parting place and be connected joint bar, remarkable in economical benefits, and increasing operating space bottom ell, easy construction, being worthy to be popularized.
Accompanying drawing explanation
Fig. 1 is factory building base plate earth anchor and buttress, consolidation grouting arranges that elevation is looked on a left side;
Fig. 2 is that factory building baseplate reinforcing bar arranges that elevation is looked on a left side.
Description of reference numerals: 1-leveling concrete, 2-basis joint bar, 3-base arrangement concrete, 4-nongravity capping concretion grouting, 5-ell outer reinforcement, 6-base plate outer reinforcement, 7-side wall first phase pneumatically placed concrete, 8-ell steel lining, 9-drainage for overhaul gallery, 10-disc type valve, 11-sealing, 12-ell buttress.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
First see Fig. 1, Fig. 1 illustrates factory building base plate earth anchor of the present invention and buttress, consolidation grouting arranges that elevation is looked on a left side, as we can see from the figure, after factory building base plate excavation, first the bottom is the leveling concrete 1 of the thick C25 polypropylene fiber concrete of one deck 10cm ~ 20cm, leveling concrete 1 arranges nongravity capping concretion grouting 4, this nongravity capping concretion grouting 4 gos deep into downwards in basement rock, grouting hole depth 3m, and blossom type is arranged, between array pitch 3mx3m, construct in Ying Antiao hole, each grouting region.And then base arrangement concrete 3 is set on upper strata.
Composition graphs 2 can be found out, at ell section backactor hole base plate and sidewall, first phase pneumatically placed concrete 7 is all set, and basic joint bar 2(φ 25 is set, L=3m, expose 0.5m) draw anchor to be connected as earth anchor with ell steel lining 8, at ell buttress 12 position, basic joint bar 2(φ 25, L=3m is set, expose 0.5/0.7m) be connected with the vertical reinforcement of ell buttress 12, as shown in the basic joint bar 2 of the left side sidewall in Fig. 1 and lower bottom part.In addition, the same with the powerhouse of hydropower station of routine, it is also provided with drainage for overhaul gallery 9, disc type valve 10 and sealing 11.
As shown in Figure 2, ell outer reinforcement 5 and base plate outer reinforcement 6 is also provided with in ell section and base plate position.
During the invention process, carry out according to following steps:
The first step, base plate has excavated rear pneumatically placed concrete and has carried out levelling formation leveling concrete 1;
Second step, arranges basic joint bar 2;
3rd step, carries out nongravity capping concretion grouting 4 and constructs.
4th step, first lays base plate bottom layer reinforcing bar, re-lays ell buttress reinforcing bar, and baseplate reinforcing bar is met ell buttress and must not be blocked;
5th step builds buttress concrete;
6th step, ell steel lining 8 is installed;
7th step, leader drain, dish-type valve chamber, ell reinforcing bar and dynamo-electric embedded part are installed, and finally lay ell outsourcing reinforcing bar and build ell concrete.
Certainly, more than just embody rule example of the present invention, the technical scheme that the present invention also has other embodiment, all employings to be equal to replacement or equivalent transformation to be formed, all drops within protection domain of the presently claimed invention.
Claims (3)
1. a powerhouse of hydropower station concrete floor is improved one's methods, it is characterized in that: after powerhouse of hydropower station base plate has excavated, second stage concrete is not set, spray 10cm ~ 20cm thick C25 polypropylene fiber concrete carries out levelling, and basic joint bar is all set with sidewall draws anchor to be connected as earth anchor with ell steel lining at the machine hole base plate of ell section excavation, basic joint bar is set at ell buttress position and is connected with ell buttress vertical reinforcement; Then on leveling layer, carry out uncovered be heavily in the milk; First lay base plate bottom layer reinforcing bar and re-lay buttress reinforcing bar, build with after-pouring buttress structural concrete, lift ell steel lining after reaching the age of concrete and after installing, carry out the colligation of ell steel lining outer reinforcement, finally building base arrangement concrete.
2. according to the powerhouse of hydropower station Concrete bottom plate structure that the method for claim 1 is improved, it is characterized in that: it comprises the leveling concrete (1), nongravity capping concretion grouting (4) on leveling layer and the base arrangement concrete (3) that are sprayed on base plate; Described leveling concrete (1) is polypropylene fiber concrete; At ell section backactor hole base plate, basic joint bar (2) is set at sidewall and draws anchor to be connected as earth anchor with ell steel lining (8), basic joint bar (2) is set at ell buttress (12) position and is connected with ell buttress vertical reinforcement.
3. powerhouse of hydropower station Concrete bottom plate structure according to claim 2, is characterized in that: the grouting hole depth 3m of described base plate nongravity capping concretion grouting (4), and blossom type is arranged, an array pitch 3mx3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510174654.0A CN105089023A (en) | 2015-04-14 | 2015-04-14 | Hydropower house concrete bottom plate improvement method and structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510174654.0A CN105089023A (en) | 2015-04-14 | 2015-04-14 | Hydropower house concrete bottom plate improvement method and structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN105089023A true CN105089023A (en) | 2015-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510174654.0A Pending CN105089023A (en) | 2015-04-14 | 2015-04-14 | Hydropower house concrete bottom plate improvement method and structure thereof |
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| CN (1) | CN105089023A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862909A (en) * | 2016-06-02 | 2016-08-17 | 中国电建集团贵阳勘测设计研究院有限公司 | Hydropower house stator foundation structure and pouring method thereof |
| CN107119705A (en) * | 2017-06-19 | 2017-09-01 | 中国电建集团贵阳勘测设计研究院有限公司 | Concrete toe board foundation reinforcing structure and method placed on unloading rock mass |
| CN107724423A (en) * | 2017-11-17 | 2018-02-23 | 中国电建集团华东勘测设计研究院有限公司 | Crane beam on rock wall for underground power house present situation foundation reinforcing structure and its construction method |
| CN107905805A (en) * | 2017-11-15 | 2018-04-13 | 中国电建集团华东勘测设计研究院有限公司 | One kind ensures that underground power house machine hole dividing pier excavates molding strengthening supporting method and underground power house machine hole dividing pier structure |
| CN108792920A (en) * | 2018-07-23 | 2018-11-13 | 国电大渡河沙坪水电建设有限公司 | Heavy stay column sets turbine draft tube fast fixing tool and method |
| CN108867586A (en) * | 2018-06-15 | 2018-11-23 | 中国水利水电第五工程局有限公司 | A kind of draft tube installation method, draft tube support frame |
-
2015
- 2015-04-14 CN CN201510174654.0A patent/CN105089023A/en active Pending
Non-Patent Citations (2)
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| 吕忠良等: "小水电立轴机组钢制肘形尾水管模板设计与施工", 《中国农村水利水电》 * |
| 宁华晚等: "索风营水电站地下厂房结构新技术研究及应用", 《贵州水力发电》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862909A (en) * | 2016-06-02 | 2016-08-17 | 中国电建集团贵阳勘测设计研究院有限公司 | Hydropower house stator foundation structure and pouring method thereof |
| CN107119705A (en) * | 2017-06-19 | 2017-09-01 | 中国电建集团贵阳勘测设计研究院有限公司 | Concrete toe board foundation reinforcing structure and method placed on unloading rock mass |
| CN107905805A (en) * | 2017-11-15 | 2018-04-13 | 中国电建集团华东勘测设计研究院有限公司 | One kind ensures that underground power house machine hole dividing pier excavates molding strengthening supporting method and underground power house machine hole dividing pier structure |
| CN107905805B (en) * | 2017-11-15 | 2024-04-26 | 中国电建集团华东勘测设计研究院有限公司 | Reinforced supporting method for guaranteeing excavation molding of machine pit partition piers of underground powerhouse and machine pit partition pier structure of underground powerhouse |
| CN107724423A (en) * | 2017-11-17 | 2018-02-23 | 中国电建集团华东勘测设计研究院有限公司 | Crane beam on rock wall for underground power house present situation foundation reinforcing structure and its construction method |
| CN108867586A (en) * | 2018-06-15 | 2018-11-23 | 中国水利水电第五工程局有限公司 | A kind of draft tube installation method, draft tube support frame |
| CN108792920A (en) * | 2018-07-23 | 2018-11-13 | 国电大渡河沙坪水电建设有限公司 | Heavy stay column sets turbine draft tube fast fixing tool and method |
| CN108792920B (en) * | 2018-07-23 | 2023-09-08 | 国能大渡河沙坪发电有限公司 | Tool and method for quickly installing draft tube of large bulb through-flow turbine unit |
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Application publication date: 20151125 |