CN105586858A - Blocking structure of diversion tunnel - Google Patents
Blocking structure of diversion tunnel Download PDFInfo
- Publication number
- CN105586858A CN105586858A CN201610137579.5A CN201610137579A CN105586858A CN 105586858 A CN105586858 A CN 105586858A CN 201610137579 A CN201610137579 A CN 201610137579A CN 105586858 A CN105586858 A CN 105586858A
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- diversion tunnel
- tunnel
- diversion
- plugging structure
- teeth portion
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a blocking structure of a diversion tunnel. The blocking structure of the diversion tunnel is small in construction amount and higher in blocking body safety and is particularly suitable for the diversion tunnel with a seriously-worn bottom plate. The blocking structure of the diversion tunnel comprises the diversion tunnel and a tunnel blocking body arranged in a blocking segment of the diversion tunnel; at least one part of the bottom of the tunnel blocking body is embedded in base rock on the lower side of the diversion tunnel; the bottom portion, embedded into the base rock, of the blocking body forms convex tooth portions with at least one downward-protruding segment; and the longitudinal sections of the convex tooth portions are in an inverted trapezoidal shape; and anchor piles are arranged on the lower bottom faces of the convex tooth portions. According to the structure, combination of the blocking body and the blocking segment of the diversion tunnel is more tight, anti-sliding stability of the blocking body is improved, the design length of the blocking body is shortened, the construction amount is small, the cost is low, the temperature of concrete is controlled more easily, and safety of the operating period of the blocking body is improved.
Description
Technical field
The invention belongs to Hydraulic and Hydro-Power Engineering field, be specifically related to a kind of plugging structure, at the bottom of particularly one is applicable to diversion tunnelThe diversion tunnel plugging structure of plate serious wear.
Background technology
In Hydraulic and Hydro-Power Engineering, the diversion tunnel of construction, completing after water conservancy diversion sluicing task, must carry out the shutoff of diversion tunnelTo meet the requirement of reservoir impoundment power generation. Traditional diversion tunnel plugging structure normally adopts the mode of casting concrete plug to sealBlock up, the concrete of building certain length in diversion tunnel forms described plug diversion tunnel block section is filled up, and utilizesThe frictional force of blocking concrete and diversion tunnel inwall and cohesive force are resisted upper water pressure.
But, compared with for long diversion tunnel, be subject to the impact of the factors such as bed load wearing and tearing throughout the year, diversion tunnel for the operation time limitSegment section bottom plate wear is comparatively serious. Because diversion tunnel base plate is to provide the main contact-making surface of drag, if serious wear will shadowRing the ability of occluding body opposing upper water pressure, increased the accident risk of occluding body. Diversion tunnel bottom plate wear is anti-to occluding bodyThe impact of power is difficult to estimate, and cohesive strength and frictional force calculating parameter value are difficult to quantize, and adopts traditional diversion tunnel shutoff knotStructure carries out shutoff, when design, will take conservative design, thereby the design length of plug is increased greatly, construction volumeGreatly, engineering cost is high; Because plug length is longer, in the process of building plug, temperature control requirement is higher, occluding body mixedSolidifying native pouring quality is difficult to ensure, has reduced the security of diversion tunnel plugging structure; In addition the long construction work that increased of plug,Phase, and then affected the generating duration. Therefore, at the bottom of diversion tunnel under the impact of following bed load constantly to wear and tear at long-term water excessivelyThe situation of plate serious wear, how to improve the security reliability of diversion tunnel occluding body and cost saving and be one urgently to be resolved hurrilyProblem.
Summary of the invention
The technical problem to be solved in the present invention is to provide the diversion tunnel shutoff knot that a kind of construction volume is less and occluding body security is higherStructure.
The technical solution adopted for the present invention to solve the technical problems is: a kind of diversion tunnel plugging structure, comprise diversion tunnel andBe arranged at the tunnel occluding body in diversion tunnel block section, bottom at least a portion of described tunnel occluding body is embedded in diversion tunnelIn the basement rock of downside.
Further, the base section that described tunnel occluding body embeds in basement rock forms at least one section of convex teeth portion to lower convexity;The longitudinal section of described convex teeth portion is inverted trapezoidal, comprises the bottom surface parallel with basement foundation face and is connected to bottom surface along waterThe upstream face at the forward and backward two ends of flow path direction and back side.
Further, described convex teeth portion is more than two sections, two periods of above convex teeth portion being axially connected successively along diversion tunnel.
Further, one section of convex teeth portion is 20～30m along the axial length of diversion tunnel.
Further, the length of grade of described upstream face is shorter than the length of grade of back side.
Further, the distance between described bottom surface and basement foundation face is 2～5m.
Further, this diversion tunnel plugging structure also comprises anchor pile; Described anchor pile is arranged in tunnel occluding body, itsLower end is passed and stretches in basement rock and basement rock anchoring by the bottom surface of convex teeth portion.
Further, the bottom surface of each section of convex teeth portion has passed at least two row's anchor piles, and every row's anchor pile is by least two edgesThe anchor pile composition that diversion tunnel axially spaced-apart is arranged, the anchor pile in two adjacent row's anchor piles shifts to install.
Further, every anchor pile comprises at least two dowels.
The invention has the beneficial effects as follows: efficiently solve diversion tunnel and follow the impact that bed load is is constantly worn and torn to go to the bottom at the long-term water of crossingThe occluding body design challenges that plate serious wear is brought, has reduced the accident risk of occluding body. By by the bottom of tunnel occluding body extremelyA few part is embedded in the basement rock of diversion tunnel downside, makes the combination of tunnel occluding body and diversion tunnel block section more tight,The ability of the tunnel occluding body opposing upper water pressure of unit length is stronger, and then makes the design length of tunnel occluding body shorter,Construction volume is little, and engineering cost is low; Because tunnel occluding body length is shorter, in the process of building tunnel occluding body, temperature is more easily controlledSystem, concrete pouring quality is high, makes this diversion tunnel plugging structure also higher in the security of runtime. Embed in basement rockConvex teeth portion longitudinal section is inverted trapezoidal, not only increased tunnel occluding body holistic arrestment slippage stabilization, and it is parallel with basement foundation faceBottom surface can conveniently be arranged anchor pile, further strengthens the stability of tunnel occluding body.
Brief description of the drawings
Fig. 1 is the enforcement structural representation of diversion tunnel plugging structure of the present invention;
Fig. 2 is the cutaway view along A-A line in Fig. 1;
The direction of arrow in Fig. 1 is water (flow) direction.
In figure, be labeled as: diversion tunnel 1, tunnel occluding body 2, convex teeth portion 21, upstream face 211, bottom surface 212, back side 213,Basement rock 3, anchor pile 4.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Shown in Fig. 1 and Fig. 2, a kind of diversion tunnel plugging structure, comprises diversion tunnel 1 and is arranged at diversion tunnel 1 envelopeTunnel occluding body 2 in stifled section, bottom at least a portion of described tunnel occluding body 2 is embedded in the basement rock 3 of diversion tunnel 1 downsideIn. Wherein, tunnel occluding body 2 is formed by concreting conventionally, and its bottom can be to be all embedded in basement rock 3, also canBeing to be partially submerged into basement rock 3; Tunnel occluding body 2 bottoms embed that the amount of basement rock 3 is larger, insert depth is darker, accordinglyThe ability that the tunnel occluding body 2 of unit length is resisted upper water pressure is stronger, and this diversion tunnel plugging structure runtime is also safer.The base section that tunnel occluding body 2 embeds in basement rock can be various structures, is preferably the knot that trailing flank is the inclined-plane being tilted toStructure; The tunnel occluding body 2 of this structure is not subject to the impact of diversion tunnel 1 bottom plate wear, shape while yet not needing diversion tunnel 1 to excavateBecome, setting position is more flexible. Fore-and-aft direction as herein described is determined according to water (flow) direction, taking the flow direction of current as rearTo.
As a preferred embodiment of the present invention, as shown in Figure 1, described tunnel occluding body 2 embeds the base section in basement rock 3Form at least one section of convex teeth portion 21 to lower convexity; The longitudinal section of described convex teeth portion 21 is inverted trapezoidal, and convex teeth portion 21 comprises and baseThe bottom surface 212 that rock 3 base surfaces are parallel and be connected to the upstream face of bottom surface 212 along the forward and backward two ends of water (flow) direction211 and back side 213. Longitudinal section is the convex teeth portion 21 of inverted trapezoidal, not only makes tunnel occluding body 2 and diversion tunnel 1 block sectionCombination more tight, and back side 213 has guide effect, can be under the long term of upper water pressure, largerUnder upper water pressure-acting or when tunnel occluding body 2 is expanded with heat and contract with cold effects smaller volume, upwards promote tunnel occluding body2, tunnel occluding body 2 and diversion tunnel 1 block section are further closely linked, improve greatly tunnel occluding body2 holistic arrestment slippage stabilizations, plugging effect is good, and the runtime is safe. The length of convex teeth portion 21 refers to the length of inverted trapezoidal upper base,The general upper water calculation of pressure of opposing is as required determined the length of tunnel occluding body 2 and the quantity of convex teeth portion 21; Conventionally, oneSection convex teeth portion 21 is 20～30m along the axial length of diversion tunnel 1. Basement rock 3 base surfaces refer to Dam Base Surface, are generally clearlyBasement rock 3 surfaces after reason.
On the basis of the above, the ability of resisting upper water pressure in order to improve the tunnel occluding body 2 of unit length, does not increase and executes againWork difficulty and cost, described convex teeth portion 21 is more than two sections; In order to improve the cooperative ability of multistage convex teeth portion 21, further carryThe ability of high tunnel occluding body 2 entirety opposing upper water pressure, two sections of above convex teeth portions 21 along diversion tunnel 1 axially successivelyBe connected.
Preferably, more as shown in Figure 1, the length of grade of described upstream face 211 is shorter than the length of grade of back side 213. Upstream face 211Length of grade is shorter than the length of grade of back side 213, and the horizontal length of corresponding upstream face 211 is also short than the horizontal length of back side 213;Arrange like this, can increase the area of back side 213, again because back side 213 is main stress surfaces, its area increasesMean the stressed less of unit are, the ability of opposing upper water pressure is stronger, and this plugging structure is safer.
In order to ensure the security of this diversion tunnel plugging structure, do not increase again difficulty of construction and construction cost, described bottom surface 212And the distance between basement rock 3 base surfaces is 2～5m.
As another kind of preferred version of the present invention, more as depicted in figs. 1 and 2, this diversion tunnel plugging structure also comprises dowelStake 4; Described anchor pile 4 is arranged in tunnel occluding body 2, and its lower end is passed and stretched to by the bottom surface 212 of convex teeth portion 21In basement rock 3 with basement rock 3 anchorings. The security that anchor pile 4 and basement rock 3 anchorings can further improve diversion tunnel plugging structure,The ability that the tunnel occluding body 2 of lifting unit length is resisted upper water pressure, makes the length of tunnel occluding body 2 shorter, and engineering becomesThis is lower.
Preferably, the bottom surface 212 of each section of convex teeth portion 21 has passed at least two row's anchor piles 4, and every row's anchor pile 4 is by leastTwo anchor piles 4 of arranging along diversion tunnel 1 axially spaced-apart form, and anchor pile 4 dislocation in two adjacent row's anchor piles 4 are establishedPut. Conventionally the length of bottom surface 212 is determined according to the quantity of stablizing the needed anchor pile 4 of this diversion tunnel plugging structure. ToolBody, every anchor pile 4 comprises at least two dowels; Preferably adopt the anchor pile 4 of three dowel compositions. The anchor shifting to installMuscle stake 4 can make full use of the anchor force of each root anchor pile 4, makes anchor pile 4 quantity that use under equal anchoring effectMinimum, be beneficial to cost-savingly, reduce construction volume.
A construction method for diversion tunnel plugging structure, for above-mentioned any one diversion tunnel plugging structure of constructing; The methodComprise the following steps:
Step 1,1 time lock of diversion tunnel, and in the delivery port cofferdam of diversion tunnel 1 and enter hole road construction;
Step 2, waterwall concreting, tunnel occluding body 2 foundation ditch forced-ventilated water, the infiltration of upstream and downstream waterwall is processed;
Step 3, to the base plate lining cutting armored concrete cutting in diversion tunnel 1 block section and break process;
Step 4, by clear the position of tunnel occluding body 2 to be filled base to basement rock 3 base surfaces, then on basement rock 3, excavation formsAt least one longitudinal section is the serrate slot of inverted trapezoidal, arranges anchor pile 4 on the bottom surface of serrate slot;
Step 5, sealing and template are installed, finally by concreting to diversion tunnel 1 block section, and carry out successively backfillGrouting and consolidation grouting form tunnel occluding body 2.
Embodiment
The diversion tunnel 1 of certain high arch dam Hydropower Project all has washing away in various degree along journey base plate, and top layer even has reinforcing bar exposed,The favourable opposition of the range estimation diversion tunnel 1 block section base plate hole degree of depth just has 50～60cm, but abutment wall, crown are substantially intact. According to electric powerSpecification " hydraulic tunnel design specification " (DL/T5195-2004), and adopts water conservancy industry specification " hydraulic tunnel design specification "(SL279-2002) check, the length that calculates tunnel occluding body 2 should be 50m, need to arrange two sections along diversion tunnel 1Axial length is respectively the convex teeth portion 21 of 22m and 28m.
The diversion tunnel plugging structure of this high arch dam Hydropower Project, comprises diversion tunnel 1 and is arranged at diversion tunnel 1 block sectionInterior tunnel occluding body 2, bottom at least a portion of described tunnel occluding body 2 is embedded in the basement rock 3 of diversion tunnel 1 downside;Described tunnel occluding body 2 embed base section in basement rock form two sections along diversion tunnel 1 be axially connected successively and to lower convexityConvex teeth portion 21; The longitudinal section of described convex teeth portion 21 is inverted trapezoidal, comprise the bottom surface 212 parallel with basement rock 3 base surfaces withAnd be connected to upstream face 211 and the back side 213 of bottom surface 212 along the forward and backward two ends of water (flow) direction; Two sections of convex teeth portionsDistance between 21 bottom surface 212 and basement rock 3 base surfaces is 2.45m, and first paragraph convex teeth portion 21 (is positioned at the protruding of front sideTooth portion 21) the horizontal length of upstream face 211, bottom surface 212 and back side 213 be followed successively by 5m, 7m and 10m, second segmentThe horizontal length of upstream face 211, bottom surface 212 and the back side 213 of convex teeth portion 21 is followed successively by 5m, 7m and 16m; Tunnel envelopeIn stifled body 2, be provided with anchor pile 4, the lower end of anchor pile 4 passes and stretches in basement rock 3 by the bottom surface 212 of convex teeth portion 21With basement rock 3 anchorings; The bottom surface 212 of each section of convex teeth portion 21 has passed five row's anchor piles 4, and every row's anchor pile 4 is by four edgesThe anchor pile 4 that diversion tunnel 1 axially spaced-apart 2m arranges forms, and the anchor pile 4 in two adjacent row's anchor piles 4 shifts to install;Every anchor pile 4 is arranged the reinforcing bar that three diameters are 32mm.
The construct method of above-mentioned diversion tunnel plugging structure, comprises the following steps:
Step 1,1 time lock of diversion tunnel, and in the delivery port cofferdam of diversion tunnel 1 and enter hole road construction;
Step 2, waterwall concreting, tunnel occluding body 2 foundation ditch forced-ventilated water, the infiltration of upstream and downstream waterwall is processed;
Step 3, to the base plate lining cutting armored concrete cutting in diversion tunnel 1 block section and break process;
Step 4, by clear the position of tunnel occluding body 2 to be filled base to basement rock 3 base surfaces, then on basement rock 3, excavation formsTwo are connected and longitudinal section is the serrate slot of inverted trapezoidal successively; The degree of depth of two serrate slots is 2.45m, and first serrate slot (Be positioned at the serrate slot of front side) the horizontal length of front bevel, bottom surface and back bevel be followed successively by 5m, 7m and 10m, second profile of toothThe horizontal length of front bevel, bottom surface and the back bevel of groove is followed successively by 5m, 7m and 16m; On the bottom surface of each serrate slot, arrange fiveRow's anchor pile 4, every row's anchor pile 4 is made up of four anchor piles 4 of arranging along diversion tunnel 1 axially spaced-apart 2m, and adjacent twoAnchor pile 4 in row's anchor pile 4 shifts to install; Every anchor pile 4 is arranged the reinforcing bar that three diameters are 32mm;
Step 5, sealing and template are installed, finally by concreting to diversion tunnel 1 block section, and carry out successively backfillGrouting and consolidation grouting form tunnel occluding body 2.
Claims (9)
1. a diversion tunnel plugging structure, comprises diversion tunnel (1) and is arranged at the tunnel in diversion tunnel (1) block sectionOccluding body (2), is characterized in that: bottom at least a portion of described tunnel occluding body (2) is embedded under diversion tunnel (1)In the basement rock (3) of side.
2. diversion tunnel plugging structure as claimed in claim 1, is characterized in that: described tunnel occluding body (2) embeds basement rock(3) base section in forms at least one section of convex teeth portion to lower convexity (21); The longitudinal section of described convex teeth portion (21) is downTrapezoidal, comprise the bottom surface (212) parallel with basement rock (3) base surface and be connected to bottom surface (212) along current sideTo upstream face (211) and the back side (213) at forward and backward two ends.
3. diversion tunnel plugging structure as claimed in claim 2, is characterized in that: described convex teeth portion (21) is more than two sections,Two periods of above convex teeth portion (21) being axially connected successively along diversion tunnel (1).
4. diversion tunnel plugging structure as claimed in claim 2, is characterized in that: one section of convex teeth portion (21) is along diversion tunnel(1) axial length is 20～30m.
5. diversion tunnel plugging structure as claimed in claim 2, is characterized in that: the length of grade of described upstream face (211) is than the back of the bodyThe length of grade of the water surface (213) is short.
6. diversion tunnel plugging structure as claimed in claim 2, is characterized in that: described bottom surface (212) and basement rock (3)Distance between base surface is 2～5m.
7. the diversion tunnel plugging structure as described in any one in claim 2 to 6, is characterized in that: this diversion tunnel shutoffStructure also comprises anchor pile (4); Described anchor pile (4) is arranged in tunnel occluding body (2), and its lower end is by convex teeth portion (21)Bottom surface (212) pass and stretch in basement rock (3) and basement rock (3) anchoring.
8. diversion tunnel plugging structure as claimed in claim 7, is characterized in that: the bottom surface of each section of convex teeth portion (21)(212) passed at least two row anchor piles (4), every row's anchor pile (4) by least two along diversion tunnel (1) axially spaced-apartAnchor pile (4) composition of arranging, the anchor pile (4) in two adjacent row's anchor piles (4) shifts to install.
9. diversion tunnel plugging structure as claimed in claim 8, is characterized in that: every anchor pile (4) comprises at least twoDowel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610137579.5A CN105586858B (en) | 2016-03-10 | 2016-03-10 | A kind of diversion tunnel plugging structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610137579.5A CN105586858B (en) | 2016-03-10 | 2016-03-10 | A kind of diversion tunnel plugging structure |
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| CN105586858A true CN105586858A (en) | 2016-05-18 |
| CN105586858B CN105586858B (en) | 2018-11-30 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313785A (en) * | 2017-08-23 | 2017-11-03 | 中国电建集团成都勘测设计研究院有限公司 | High dam ecology water supply hole block section liner structure |
| CN107605511A (en) * | 2017-08-31 | 2018-01-19 | 中国电建集团北京勘测设计研究院有限公司 | Cavern's plug peripheral water stopping structure and its construction method |
| CN107724351A (en) * | 2017-11-14 | 2018-02-23 | 长江勘测规划设计研究有限责任公司 | A kind of diversion tunnel vertical cyclindrical shape stopper structure pattern and method |
| CN107908866A (en) * | 2017-11-14 | 2018-04-13 | 长江勘测规划设计研究有限责任公司 | A kind of diversion tunnel vertical cyclindrical shape plug Design of length method |
| CN108867587A (en) * | 2018-07-10 | 2018-11-23 | 贵州大学 | A kind of plugging structure of the permanent plug of water conservancy diversion tunnel |
| CN110004959A (en) * | 2019-04-26 | 2019-07-12 | 中国葛洲坝集团第一工程有限公司 | Concrete cofferdam rapid constructing method and template under circumstance of flowing water |
| CN110409390A (en) * | 2019-07-08 | 2019-11-05 | 武汉大学 | A kind of the sawtooth pattern concrete plug and its construction method of Construction for Hydroelectric Project diversion tunnel |
| CN114233390A (en) * | 2021-12-20 | 2022-03-25 | 中铁二院工程集团有限责任公司 | Auxiliary tunnel plugging structure suitable for weak surrounding rock and calculation method thereof |
| CN114960483A (en) * | 2022-04-22 | 2022-08-30 | 浙江华东工程建设管理有限公司 | Diversion tail water tunnel reconstruction plug upstream permanent drainage structure and drainage method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313785A (en) * | 2017-08-23 | 2017-11-03 | 中国电建集团成都勘测设计研究院有限公司 | High dam ecology water supply hole block section liner structure |
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| CN107605511A (en) * | 2017-08-31 | 2018-01-19 | 中国电建集团北京勘测设计研究院有限公司 | Cavern's plug peripheral water stopping structure and its construction method |
| CN107724351A (en) * | 2017-11-14 | 2018-02-23 | 长江勘测规划设计研究有限责任公司 | A kind of diversion tunnel vertical cyclindrical shape stopper structure pattern and method |
| CN107908866A (en) * | 2017-11-14 | 2018-04-13 | 长江勘测规划设计研究有限责任公司 | A kind of diversion tunnel vertical cyclindrical shape plug Design of length method |
| CN107908866B (en) * | 2017-11-14 | 2023-05-30 | 长江勘测规划设计研究有限责任公司 | Method for designing length of straight cylindrical plug of diversion tunnel |
| CN108867587A (en) * | 2018-07-10 | 2018-11-23 | 贵州大学 | A kind of plugging structure of the permanent plug of water conservancy diversion tunnel |
| CN110004959A (en) * | 2019-04-26 | 2019-07-12 | 中国葛洲坝集团第一工程有限公司 | Concrete cofferdam rapid constructing method and template under circumstance of flowing water |
| CN110409390A (en) * | 2019-07-08 | 2019-11-05 | 武汉大学 | A kind of the sawtooth pattern concrete plug and its construction method of Construction for Hydroelectric Project diversion tunnel |
| CN114233390A (en) * | 2021-12-20 | 2022-03-25 | 中铁二院工程集团有限责任公司 | Auxiliary tunnel plugging structure suitable for weak surrounding rock and calculation method thereof |
| CN114960483A (en) * | 2022-04-22 | 2022-08-30 | 浙江华东工程建设管理有限公司 | Diversion tail water tunnel reconstruction plug upstream permanent drainage structure and drainage method |
| CN114960483B (en) * | 2022-04-22 | 2024-01-12 | 浙江华东工程建设管理有限公司 | Diversion tail water hole reconstruction plugging head upstream permanent drainage structure and drainage method |
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| Publication number | Publication date |
|---|---|
| CN105586858B (en) | 2018-11-30 |
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