CN110258457A - The full hole section maintenance checkdam structure of Canyon Area hydroelectric project diversion tunnel - Google Patents
The full hole section maintenance checkdam structure of Canyon Area hydroelectric project diversion tunnel Download PDFInfo
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- CN110258457A CN110258457A CN201910561948.7A CN201910561948A CN110258457A CN 110258457 A CN110258457 A CN 110258457A CN 201910561948 A CN201910561948 A CN 201910561948A CN 110258457 A CN110258457 A CN 110258457A
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- 238000012423 maintenance Methods 0.000 title claims abstract description 40
- 239000004927 clay Substances 0.000 claims abstract description 64
- 238000010276 construction Methods 0.000 claims abstract description 64
- 239000004575 stone Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000008439 repair process Effects 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 71
- 239000010959 steel Substances 0.000 claims description 71
- 239000012528 membrane Substances 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 5
- 239000003657 drainage water Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Revetment (AREA)
Abstract
The invention discloses a kind of Canyon Area hydroelectric project diversion tunnel full hole section maintenance checkdam structure and its repair methods, belong to hydraulic and hydroelectric engineering field, a kind of full hole section maintenance checkdam structure of the diversion tunnel suitable for Canyon Area construction of hydropower plant and repair method are provided.The present invention can adapt to the water blocking height of water level of different times in the construction process: being initially formed lower stone ballast dam structure, meets construction time water blocking requirement；By the way that clay bag heap dam structure is arranged, further increase the water blocking water level requirement for having adapted to turn(a)round, so that the full hole section of diversion tunnel becomes possibility together with the maintenance of internal lock chamber；And clay bag heap dam structure further can also adjust water blocking elevation according to practical upland water, and it is very flexibly and easily, adaptable.Structure construction provided by the present invention is simple, cheap, and structure is safe and reliable, good seepage-proof property.
Description
Technical field
The present invention relates to hydraulic and hydroelectric engineering field more particularly to a kind of full hole section maintenance of Canyon Area hydroelectric project diversion tunnel
With checkdam structure and its repair method.
Background technique
Currently, Southwestern China region is just being built and more large and medium-sized hydroelectric projects in dam of planning and designing, such as double Jiangkou 312m, two
River mouth 295m, such as beauty 315m, leaf bar beach 217m, Ma Er keep off 210m.It is well known that these large and medium-sized hydroelectric projects are respectively positioned on height
In waterway between mountains paddy, riverbed two sides side slope is precipitous, and river is narrow, and construction diversion is all made of the tunnel that corresponding diversion tunnel is excavated in massif
Hole diversion plan makes upper river change its course and flows into downstream river course through diversion tunnel.
The large and medium-sized hydroelectric project diversion tunnel operation in Canyon Area has a characteristic that 1. river valley is narrow, inlet of diversion tunnel elevation
It is low, and arrangement space is extremely limited；2. project scale is grand, diversion tunnel long operational time, runing time may up to 6 years or
More long, longtime running diversion tunnel is by the very risky of erosion damage；3. the usual elevation of inlet of diversion tunnel approach channel is very low, Qu Qianji
This debris retaining is without storage capacity.In addition, the river bed load in southwest basin is come, amount is larger, and construction time diversion tunnel upstream arrangement has more
Cinder field and life campsite, there may be scaling-off situation along the river, thus diversion tunnel is easily by erosion attack, this brings very to engineering
Big security risk, once accident occurs for diversion tunnel, the loss caused by engineering is very big.Therefore, if can be carried out to diversion tunnel complete
Hole section maintenance, it is undoubtedly significant to the safety of guarantee construction of hydropower plant, to guarantee overhauling for the full hole section of diversion tunnel dryly
The design and construction of condition, the full hole section maintenance checkdam structure of diversion tunnel becomes the critical issue of the full hole section maintenance of diversion tunnel.
Currently, inlet of diversion tunnel have in the case where arrangement condition using it is more be retaining rockfill cofferdam dam.However, gorge
Paddy area, river, construction of hydropower plant region is narrow, and the design of inlet of diversion tunnel approach channel is short, using the space very little of arrangement, according to
Traditional checkdam structure, there are more problems: 1. it is larger to account for pressure space for inlet of diversion tunnel arrangement, it is difficult to arrange, or even can not cloth
It sets (such as double Jiangkous 1# diversion tunnel), and narrowed channel is serious, accordingly raises river water level, increases difficulty of construction；2. traditional water blocking
Dam structure construction needs to be increased difficulty of construction using the biggish seepage control method of difficulty, extended the construction period；3. due to
Traditional checkdam structural style is larger, and the checkdam later period removes difficulty also very greatly, and dismounting is not thorough.
In conclusion studying a kind of full hole section maintenance checkdam knot of the diversion tunnel suitable for Canyon Area construction of hydropower plant
Structure is significant.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of full hole sections of diversion tunnel suitable for Canyon Area construction of hydropower plant
Maintenance checkdam structure is big efficiently against traditional checkdam structure arrangement space, Seepage difficulty is big, it is big to remove difficulty
The disadvantages of.
The technical solution adopted by the present invention to solve the technical problems is: the full hole section maintenance of Canyon Area hydroelectric project diversion tunnel
With checkdam structure, including frame grid type steel caisson structure, clay bag heap dam structure, gravel clay structure and stone ballast dam structure；Institute
It states frame grid type steel caisson structure to be arranged in the import open channel section of diversion tunnel, and filled with viscous in frame grid type steel caisson structure
Earth bag；The clay bag heap dam structure is located at frame grid type steel caisson structural top；It is heavy that the stone ballast dam structure is located at frame grid type steel
The upstream of box structure；The gravel clay structure filling is between stone ballast dam structure and frame grid type steel caisson structure.
Further, laying one layer of geo membrane layers to frame grid type steel caisson knot in the diversion face of frame grid type steel caisson structure
The top of structure.
It further, the crest level of gravel clay structure is identical with the crest level of stone ballast dam structure, and is Hs, and
Hs=H1+0.5m；Wherein, H1It is rounded the 5 years one flood stream met in a construction time for checkdam structure corresponding construction time section
Design water level before the corresponding hole of amount.
Further, the crest level of frame grid type steel caisson structure is Hk, and meet Hk=H2+0.5m；Clay bag heap dam
The crest level of structure is Hn, and meet Hn=H3+0.5m；Wherein: H2Take meet within 5 years one in entirely maintenance construction time section
Design water level before hole corresponding to flood discharge；H3Take the flood discharge institute met for 8 years one in entirely maintenance construction time section right
Design water level before the hole answered, and H1<H2<H3。
Further, the upstream and downstream slope ratio of stone ballast dam structure is respectively set to 1:1.5, set at the top of stone ballast dam structure
Set the hoisting platform of frame grid type steel caisson structure.
In addition, being sent out the present invention also provides a kind of full hole section repair method of Canyon Area hydroelectric project diversion tunnel using above-mentioned
The bright full hole section maintenance checkdam structure of the Canyon Area hydroelectric project diversion tunnel, includes the following steps:
A, the gate of lower lock diversion tunnel, streamflow is from turn(a)round current by pass overcurrent；
B, rock ballast is backfilled before the hole of diversion tunnel and form stone ballast dam structure, construct to form frame grid type in stone ballast dam structural top
The hoisting platform of steel caisson structure；
C, crane is placed on the hoisting platform of stone ballast dam structural top, is hung in frame grid type steel caisson structure using crane
In the import open channel section of diversion tunnel, clay bag then is thrown into frame grid type steel caisson structure and is filled；Later in frame grid type
Steel caisson structural top piles up clay bag to form clay bag heap dam structure；
D, one layer of geo membrane layers are laid to the top of frame grid type steel caisson structure in the diversion face of frame grid type steel caisson structure,
Then gravel clay is filled out between stone ballast dam structure and frame grid type steel caisson structure and carries out Anti-seeping technology, and forms gravel clay knot
Structure；
E, checkdam structure is formed after A to D construction through the above steps, opens the gate of diversion tunnel later, carries out in hole
Pump drainage water；The full hole section upkeep operation of diversion tunnel is carried out later；
F, after upkeep operation, the gate of diversion tunnel is closed, successively removes clay bag heap dam structure, frame grid type steel caisson
Structure, gravel clay structure and stone ballast dam structure.
Further, removing clay bag heap dam structure first using crane in step F, then removing and recycle frame
Format steel caisson structure；Gravel clay structure and stone ballast dam structure are removed using long-armed backacter again.
Further, the maintenance construction of diversion tunnel can be arranged in withered time phase of lock plugging construction the previous year under diversion tunnel
It is carried out in section.
The beneficial effects of the present invention are:
1. the full hole section of Canyon Area hydroelectric project diversion tunnel of the present invention, which is overhauled, uses checkdam structure, in work progress
It can adapt to the water blocking height of water level of different times: carrying out the construction of stone ballast dam, the period water in the more withered period of withered phase first
Position is lower, forms lower stone ballast dam structure, meets construction time water blocking requirement.In addition, the stone ballast dam elevation more slow due to slope
It is arranged lower, hence it is evident that the space of structure arrangement is saved, so that entire checkdam structure will not occupy excessive inlet of diversion tunnel
Plan-position, and stone ballast dam structure construction is convenient, while also providing construction operation for further lifting frame grid type steel caisson structure
Platform condition greatly reduces the difficulty of frame grid type steel caisson structure hoisting construction.
2. the frame grid type steel caisson structural top elevation formed is higher than 5 years one floods met in entire maintenance construction time section
Design water level before hole corresponding to water flow, by the way that clay bag heap dam structure is arranged, increasing further has adapted to turn(a)round
The requirement of water blocking water level so that diversion tunnel full hole section becomes possibility, water blocking guarantee property together with the maintenance of internal lock chamber
It is higher, and clay bag heap dam structure further can also adjust water blocking elevation according to practical upland water, it is very flexibly square
Just, adaptable.
3. by being laid with geo membrane layers in frame grid type steel caisson structure diversion surface side, and in frame grid type steel caisson structure and stone
Gravel clay structure is built between slag dam structure, significantly enhances the anti-seepage effect of entire checkdam structure；
4. each section figure is smaller according to cofferdam structure method for dismounting provided by the invention, dismounting difficulty is little, and frame
The dismounting and recycling of format steel caisson are also relatively easy to.
In short, structure construction provided by the present invention is simple, cheap, structure is safe and reliable, good seepage-proof property, realizes
The closure of Canyon Area hydroelectric project diversion tunnel is shut off, and provides upkeep operation together with the maintenance of internal lock chamber for the full hole section of diversion tunnel
Condition.
Detailed description of the invention
Fig. 1 is the schematic diagram that checkdam structure is used in the full hole section maintenance of hydroelectric project diversion tunnel in Canyon Area of the present invention；
In the figure, it is marked as frame grid type steel caisson structure 1, clay bag heap dam structure 2, gravel clay structure 3, stone ballast dam structure
4, import open channel section 5, geo membrane layers 6, crane 7.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, the full hole section maintenance checkdam structure of hydroelectric project diversion tunnel in Canyon Area of the present invention, packet
Include frame grid type steel caisson structure 1, clay bag heap dam structure 2, gravel clay structure 3 and stone ballast dam structure 4；The frame grid type steel is heavy
Box structure 1 is arranged in the import open channel section 5 of diversion tunnel, and clay bag is filled in frame grid type steel caisson structure 1；It is described
Clay bag heap dam structure 2 is located at 1 top of frame grid type steel caisson structure；The stone ballast dam structure 4 is located at frame grid type steel caisson structure 1
Upstream；The gravel clay structure 3 is filled between stone ballast dam structure 4 and frame grid type steel caisson structure 1.
More specifically, also one layer of geotechnique further can be being laid in the diversion face of frame grid type steel caisson structure 1 in the present invention
Film layer 6 is to the top of frame grid type steel caisson structure 1.It can play the role of better antiseepage by geo membrane layers 6.Geo membrane layers 6
Laying specifically can refer to shown in attached drawing, the upper end behind the top for extending to frame grid type steel caisson structure 1 can further by
The top of frame grid type steel caisson structure 1 is completely covered.
More specifically, it for the crest level of each structure, is configured in the present invention further according to the following size:
The crest level of gravel clay structure 3 and the crest level of stone ballast dam structure 4 may be configured as identical size Hs, and be
Hs=H1+ 0.5m, wherein H1It is rounded the 5 years one flood stream met in a construction time for checkdam structure corresponding construction time section
Design water level before the corresponding hole of amount.The benefit being arranged in this way is: effectively guaranteeing subsequent frame grid type steel caisson structure 1 and gravel
The dry ground condition that clay structure 3 is constructed.Wherein, above-mentioned " construction time of entire checkdam structure corresponding construction time section " refers to
During being the full hole section maintenance checkdam structure construction of hydroelectric project diversion tunnel in Canyon Area of the present invention when corresponding construction
Between section；Construction corresponding to step A to D in the full hole section repair method of Canyon Area hydroelectric project diversion tunnel specially in the present invention
Period.
More, the crest level that frame grid type steel caisson structure 1 is further preferably arranged in the present invention is Hk, and meet Hk
=H2+0.5m；The crest level of clay bag heap dam structure 2 is Hn, and meet Hn=H3+0.5m；Wherein: H2It takes and is applied in entire maintenance
Design water level before hole corresponding to 5 years one flood discharges met in the work period；H3It takes eight in entirely maintenance construction time section
Design water level before hole corresponding to the flood discharge that year one meets.The benefit being arranged in this way is: being effectively ensured in turn(a)round diversion tunnel
Dry ground condition so that the maintenance of whole diversion tunnel is gone on smoothly, and increase clay bag heap dam structure 2 and further improve water blocking
Guarantee property.Wherein, above-mentioned " entire maintenance construction time section " refers to the Canyon Area full hole of hydroelectric project diversion tunnel in the present invention
Construction time section corresponding to step A to F in section repair method.
More specifically, meet in the present invention further to above-mentioned elevation parameter request: H1<H2<H3；What is be arranged in this way is good
Place is: can sufficiently combine the hole in the work progress for building the full hole section maintenance checkdam structure of Canyon Area hydroelectric project diversion tunnel
Preceding water level controls the masonry crest level of each structure, reduces whole project amount as far as possible, and shortening the construction period, reduction is constructed into simultaneously
This.
More specifically, the upstream and downstream slope ratio for stone ballast dam structure 4 being further preferably arranged in the present invention is respectively set to 1:
1.5, in the hoisting platform of the top of stone ballast dam structure 4 setting frame grid type steel caisson structure 1.Wherein hoisting platform is for placing
Corresponding crane 7, in order to carry out the lifting construction to frame grid type steel caisson structure 1 by the crane 7, so that construction is more square
Just.
Clay bag heap dam structure 2 in the present invention is by being formed by checkdam structure after piling up clay bag, such as attached drawing 1
Shown in, it can trapezoidal structure after piling up.And since clay bag heap dam structure 2 is that clay bag is piled up, heap
It is all relatively convenient to build construction and disassembly, and clay can be adjusted according to practical upland water in actual work progress
2 height of bag heap dam structure, and then total water blocking elevation of entire checkdam structure can be adjusted in certain altitude range.
The full hole section maintenance checkdam structure of the Canyon Area hydroelectric project diversion tunnel in conjunction with described in aforementioned present invention, the present invention
A kind of full hole section repair method of Canyon Area hydroelectric project diversion tunnel is also provided, is specifically comprised the following steps:
A, the gate of lower lock diversion tunnel, streamflow is from turn(a)round current by pass overcurrent；
B, rock ballast being backfilled before the hole of diversion tunnel and forming stone ballast dam structure 4, construction forms sash at the top of stone ballast dam structure 4
The hoisting platform of formula steel caisson structure 1；
C, crane 7 is placed on the hoisting platform at the top of stone ballast dam structure 4, using crane 7 by frame grid type steel caisson structure 1
It hangs in the import open channel section 5 of diversion tunnel, is then thrown into clay bag into frame grid type steel caisson structure 1 and is filled；Exist later
Clay bag is piled up at the top of frame grid type steel caisson structure 1 to form clay bag heap dam structure 2；
D, one layer of geo membrane layers 6 are laid to the top of frame grid type steel caisson structure 1 in the diversion face of frame grid type steel caisson structure 1
Then portion fills out gravel clay between stone ballast dam structure 4 and frame grid type steel caisson structure 1 and carries out Anti-seeping technology, and forms gravel
Clay structure 3；
E, checkdam structure is formed after A to D construction through the above steps, opens the gate of diversion tunnel later, carries out in hole
Pump drainage water；The full hole section upkeep operation of diversion tunnel is carried out later；
F, after upkeep operation, the gate of diversion tunnel is closed, removes clay bag heap dam structure 2, frame grid type steel caisson knot
Structure 1, gravel clay structure 3 and stone ballast dam structure 4.
Wherein, it is needed after the gate of lower lock diversion tunnel by turn(a)round aerial drainage in construction method described in aforementioned present invention
Channel carries out overcurrent, it is therefore desirable to which mating build has corresponding turn(a)round current by pass.In addition, shutting off when the present invention blocks completely
After diversion tunnel, in maintenance construction period, upland water needs to carry out aerial drainage, therefore corresponding needs by turn(a)round current by pass
The discharge capacity of turn(a)round current by pass meets the discharge flow in the corresponding period.Specifically, in order to reduce to turn(a)round aerial drainage
The discharge flow in channel requires, and the maintenance construction time section of entire diversion tunnel is preferably arranged in lock under diversion tunnel in the present invention and is sealed
It is carried out in withered period phase of stifled construction the previous year.
Repair method described in aforementioned present invention, instantly after the gate of lock diversion tunnel, water flow is substantially before the hole of diversion tunnel
In hydrostatic condition, therefore be conducive to carry out river closure construction.And river closure construction first is that rock ballast shape is backfilled before the hole of diversion tunnel
It at stone ballast dam structure 4, constructs more convenient, while being formed by stone ballast dam structure 4 also can be further lifting frame grid type
Steel caisson structure 1 provides construction operation condition, i.e., after the completion of stone ballast dam structure 4 is constructed, is formed at the top of stone ballast dam structure 4
Then hoisting platform is placed on hoisting platform into crane 7, hereafter carry out subsequent construction, such as subsequent frame grid type using crane 7
Construction of steel caisson structure 1 etc. can be used crane 7 and carry out lifting construction, so that construction is more convenient while also can effectively mention
High construction efficiency.
A to D can construct to form the full hole section inspection of hydroelectric project diversion tunnel in Canyon Area of the present invention through the above steps
It repairs and uses checkdam structure, hereafter can open the gate of diversion tunnel, carry out pump drainage water in hole；The full hole section inspection of diversion tunnel is carried out later
Repair operation.Wherein, the upkeep operation of diversion tunnel full hole section is generally included to carry out full section maintenance and right to diversion tunnel barrel section
The indoor gate slot of the lock of diversion tunnel and bottom sill etc. are overhauled.
After the completion of to diversion tunnel full hole section upkeep operation, i.e., dismountable clay bag heap dam structure 2, frame grid type steel caisson knot
Structure 1, gravel clay structure 3 and stone ballast dam structure 4；After the completion of dismounting, the gate of diversion tunnel can be reopened, diversion tunnel is made
It can rerun.
More specifically, the specific dismounting in step F can be used such as under type: remove clay bag heap first using crane 7
Then dam structure 2 removes and recycles frame grid type steel caisson structure 1；Gravel clay structure 3 is removed using long-armed backacter again
With stone ballast dam structure 4.Wherein, long-armed backacter should be placed in bank, be carried out using its relatively long shovel arm to gravel
Clay structure 3 and stone ballast dam structure 4 are removed, and are entered in diversion tunnel to avoid corresponding rock ballast.
Claims (8)
1. the full hole section maintenance checkdam structure of Canyon Area hydroelectric project diversion tunnel, it is characterised in that: including frame grid type steel caisson
Structure (1), clay bag heap dam structure (2), gravel clay structure (3) and stone ballast dam structure (4)；The frame grid type steel caisson structure
(1) it is arranged in the import open channel section (5) of first mid-term diversion tunnel, and is filled with clay in frame grid type steel caisson structure (1)
Bag；The clay bag heap dam structure (2) is located at the top of frame grid type steel caisson structure (1)；The stone ballast dam structure (4) is located at sash
The upstream of formula steel caisson structure (1)；The gravel clay structure (3) is filled in stone ballast dam structure (4) and frame grid type steel caisson knot
Between structure (1).
2. the full hole section maintenance checkdam structure of Canyon Area hydroelectric project diversion tunnel as described in claim 1, it is characterised in that:
One layer of geo membrane layers (6) is laid to the top of frame grid type steel caisson structure (1) in the diversion face of frame grid type steel caisson structure (1).
3. the full hole section maintenance checkdam structure of Canyon Area hydroelectric project diversion tunnel as described in claim 1, it is characterised in that:
The crest level of gravel clay structure (3) is identical with the crest level of stone ballast dam structure (4), and is Hs, and Hs=H1+0.5m；Its
In, H1It is rounded in a construction time for checkdam structure corresponding construction time section before hole corresponding to 5 years one flood discharges met
Design water level.
4. the full hole section maintenance checkdam structure of Canyon Area hydroelectric project diversion tunnel as claimed in claim 3, it is characterised in that:
The crest level of frame grid type steel caisson structure (1) is Hk, and meet Hk=H2+0.5m；The crest level of clay bag heap dam structure (2)
For Hn, and meet Hn=H3+0.5m；Wherein: H2Take the flood discharge institute met for 5 years one in entirely maintenance construction time section right
Design water level before the hole answered；H3It takes and is designed before hole corresponding to 8 years one flood discharges met in entirely maintenance construction time section
Water level, and H1<H2<H3。
5. the full hole section maintenance checkdam knot of Canyon Area hydroelectric project diversion tunnel as described in any one of Claims 1-4
Structure, it is characterised in that: the upstream and downstream slope ratio of stone ballast dam structure (4) is respectively set to 1:1.5, at the top of stone ballast dam structure (4)
The hoisting platform of frame grid type steel caisson structure (1) is set.
6. the full hole section repair method of Canyon Area hydroelectric project diversion tunnel, using described in any one of the claims 1 to 5
The full hole section maintenance checkdam structure of Canyon Area hydroelectric project diversion tunnel, characterized by the following steps:
A, the gate of the first mid-term diversion tunnel of lower lock, streamflow is from turn(a)round current by pass overcurrent；
B, rock ballast is backfilled before the hole of first mid-term diversion tunnel form stone ballast dam structure (4), shape of constructing at the top of stone ballast dam structure (4)
At the hoisting platform of frame grid type steel caisson structure (1)；
C, crane (7) is placed on the hoisting platform at the top of stone ballast dam structure (4), using crane (7) by frame grid type steel caisson knot
Structure (1) is hung in the import open channel section (5) of first mid-term diversion tunnel, is then thrown into clay bag into frame grid type steel caisson structure (1)
It is filled；Clay bag is piled up to form clay bag heap dam structure (2) at the top of frame grid type steel caisson structure (1) later；
D, one layer of geo membrane layers (6) is laid to frame grid type steel caisson structure (1) in the diversion face of frame grid type steel caisson structure (1)
Then top fills out gravel clay between stone ballast dam structure (4) and frame grid type steel caisson structure (1) and carries out Anti-seeping technology, and shape
At gravel clay structure (3)；
E, checkdam structure is formed after A to D construction through the above steps, opens the gate of just mid-term diversion tunnel later, carries out hole
Interior pump drainage water；The full hole section upkeep operation of just mid-term diversion tunnel is carried out later；
F, after upkeep operation, the gate of just mid-term diversion tunnel is closed, successively removes clay bag heap dam structure (2), frame grid type
Steel caisson structure (1), gravel clay structure (3) and stone ballast dam structure (4).
7. the full hole section repair method of Canyon Area hydroelectric project diversion tunnel as claimed in claim 6, it is characterised in that: in step F
In, clay bag heap dam structure (2) is removed first using crane (7), is then removed and is recycled frame grid type steel caisson structure (1)；Again
Gravel clay structure (3) and stone ballast dam structure (4) are removed using long-armed backacter.
8. the full hole section repair method of Canyon Area hydroelectric project diversion tunnel as claimed in claim 6, it is characterised in that: first mid-term is led
The maintenance construction in stream hole, which was arranged in withered period phase of lock plugging construction the previous year under first mid-term diversion tunnel, to be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910561948.7A CN110258457B (en) | 2019-06-26 | 2019-06-26 | Dam structure for overhauling full hole section of diversion tunnel of hydroelectric engineering in canyon area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910561948.7A CN110258457B (en) | 2019-06-26 | 2019-06-26 | Dam structure for overhauling full hole section of diversion tunnel of hydroelectric engineering in canyon area |
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| CN110258457A true CN110258457A (en) | 2019-09-20 |
| CN110258457B CN110258457B (en) | 2024-02-13 |
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