CN110359430A - A kind of Gravity Dam Foundation discharge structure - Google Patents
A kind of Gravity Dam Foundation discharge structure Download PDFInfo
- Publication number
- CN110359430A CN110359430A CN201910694723.9A CN201910694723A CN110359430A CN 110359430 A CN110359430 A CN 110359430A CN 201910694723 A CN201910694723 A CN 201910694723A CN 110359430 A CN110359430 A CN 110359430A
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- Prior art keywords
- dam
- foundation
- vertical drainage
- pipe
- dam foundation
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Links
- 230000005484 gravity Effects 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000007596 consolidation process Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 5
- 230000006378 damage Effects 0.000 abstract description 10
- 230000003014 reinforcing effect Effects 0.000 abstract description 8
- 239000000498 cooling water Substances 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000008595 infiltration Effects 0.000 description 9
- 238000001764 infiltration Methods 0.000 description 9
- 239000004746 geotextile Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000011440 grout Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- 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
- E02B7/08—Wall dams
- E02B7/10—Gravity dams, i.e. those in which the weight of the structure prevents overturning
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
Abstract
The present invention relates to a kind of Gravity Dam Foundation discharge structure and its construction methods, belong to gravity dam field of engineering technology, it includes vertical drainage hole, vertical drainage hole is arranged in the dam foundation, the one end part in vertical drainage hole is on the foundation plane of the dam foundation, it further include vertical drainage pipe, first level drainpipe, the second horizontal drain pipe, vertical drainage pipe, first level drainpipe, the second horizontal drain pipe are arranged in dam body；First level drainpipe is located on the foundation plane of the dam foundation, and vertical drainage pipe one end is connected with vertical drainage hole, and the other end is connected with the second horizontal drain pipe.The discharge structure and its construction method can reduce the setting of gallery in dam body, reduce the requirement to gallery, convenient for constructing and reducing costs, pass through pre-buried vertical drainage pipe, the second horizontal drain pipe, it can be punched to avoid in the concrete dam body poured, to reduce the damage to dam body, reinforcing bar, cooling water pipe and monitoring instrument etc., it is also more convenient construction, saves the duration.
Description
Technical field
The present invention relates to a kind of Gravity Dam Foundation discharge structure and its construction methods, belong to gravity dam field of engineering technology.
Background technique
In order to guarantee the safety of gravity dam, need to discharge the interior infiltration of the dam foundation.The interior infiltration of the dam foundation passes through in the dam foundation
It is middle that main drainage hole is set, assisted drainage hole is set in dam body, the interior infiltration of the dam foundation is discharged along main drainage hole, assisted drainage hole.
Currently, the form of construction work of main drainage hole, assisted drainage hole are as follows: the vertical and horizontal gallery of setting is first reserved in dam body, to dam body dam
After the completion of base consolidation grouting, grout curtain, then to dam body, Dam Foundation Rock brill assisted drainage hole, main drainage hole, operation in gallery
After infiltration can drain into gallery internal drainage ditch etc. by main drainage hole, assisted drainage in phase Dam Foundation Rock, then drain into outside dam.This side
Formula in dam body firstly the need of being arranged gallery, and gallery cross dimensions is to meet drilling etc. to need certain altitude, width, inside dam body
Aperture can deteriorate dam body local stress condition, therefore need to improve gallery and nearby concrete strength and lay the measures such as reinforcing bar, can be because
Reinforcing bar increases the duration for storehouse etc., also will increase certain construction investment；Secondly later period dam body inner concrete bore drainage hole when, meeting
The integrality for destroying dam concrete and reinforcing bar, may perhaps destroy the temperature control measures such as cooling water pipe in dam or may destroy
The monitoring facilities such as dam foundation crack gauge, damage dam body, it is seen then that this sample loading mode higher cost, and very inconvenient construction, to dam
There are also damages for body.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind, cost is relatively low, facilitates construction, lesser to dam body damage
Gravity Dam Foundation discharge structure.
The technical solution adopted by the present invention to solve the technical problems is: a kind of Gravity Dam Foundation discharge structure, including perpendicular
To drainage hole, vertical drainage hole is arranged in the dam foundation, and the one end part in vertical drainage hole further includes erecting on the foundation plane of the dam foundation
To drainpipe, first level drainpipe, the second horizontal drain pipe, vertical drainage pipe, first level drainpipe, the second horizontal drainage
Pipe is arranged in dam body；
First level drainpipe is located on the foundation plane of the dam foundation, and the outlet of first level drainpipe is located at downstream dam site
Outside, vertical drainage pipe one end are connected with vertical drainage hole, and the other end is connected with the second horizontal drain pipe, the second horizontal row
The outlet of water pipe is located at the outside of downstream dam site.
Further, first level drainpipe is mutually staggered with the consolidation grouting hole being arranged on the dam foundation.
Further, first level drainpipe is fixed on the foundation plane of the dam foundation by dowel.
Further, the outer surface of vertical drainage pipe, first level drainpipe, the second horizontal drain pipe is provided with guarantor
Sheath.
Further, the height of vertical drainage pipe is 1-3m.
In addition, the present invention also technical problems to be solved be to provide it is a kind of cost is relatively low, facilitate construction, to dam body damage compared with
The construction method of small Gravity Dam Foundation discharge structure.
The construction method of Gravity Dam Foundation discharge structure, comprising the following steps:
A, first level drainpipe is laid on the foundation plane of the dam foundation, the outlet of first level drainpipe is located at downstream dam site
Outside；
B, vertical drainage hole is bored downwards from the foundation plane of the dam foundation；
C, pre-buried vertical drainage pipe, the second horizontal drain pipe, make one end of vertical drainage pipe be connected with vertical drainage hole,
The other end is connected with the second horizontal drain pipe, and the outlet of the second horizontal drain pipe is located at the outside of downstream dam site；
D, the casting concrete dam body on the foundation plane of the dam foundation, vertical drainage pipe, first level drainpipe, the second horizontal row
Water pipe is arranged in dam body.
Preferably, in step a, the first level drainpipe of laying and the consolidation grouting hole being arranged on the dam foundation are mutually wrong
It opens.
Preferably, in step a, the first level drainpipe of laying is fixed on the foundation plane of the dam foundation by dowel, and
Matcoveredn is set on first level drainpipe.
Preferably, in step c, pre-buried vertical drainage pipe, the second horizontal drain pipe outer surface be provided with protective layer.
Preferably, in step c, the height of vertical drainage pipe is 1-3m.
The beneficial effects of the present invention are: the discharge structure construction process of the dam foundation of the present invention are as follows: pour coagulation on foundation plane
First level drainpipe is first laid with before earth dam body on the foundation plane of the dam foundation, the outlet of first level drainpipe is located at downstream dam site
Outside；Then vertical drainage hole is bored downwards from the foundation plane of the dam foundation；Subsequently pre-buried vertical drainage pipe, the second horizontal drainage
Pipe, makes one end of vertical drainage pipe be connected with vertical drainage hole, the other end is connected with the second horizontal drain pipe, and the second water
The outlet of flat raft water pipe is located at the outside of downstream dam site；The finally casting concrete dam body on the foundation plane of the dam foundation makes vertically to arrange
Water pipe, first level drainpipe, the second horizontal drain pipe are arranged in dam body.The surface infiltration of the dam foundation is arranged by first level
Water pipe is discharged outside dam body, and successively vertically dam body is discharged in drainage hole, vertical drainage pipe, the second horizontal drain pipe for the interior infiltration of the dam foundation
Outside, it is seen then that discharge structure and its construction method of the invention can reduce the setting of gallery in dam body, and gallery is wanted in reduction
It asks, reduces the dosage of reinforcing bar, convenient for constructing and reducing costs, the destruction to dam body local stress is also reduced, by pre-
Vertical drainage pipe, the second horizontal drain pipe are buried, can be punched to avoid in the concrete dam body poured, thus reduction pair
The damage of dam body, reinforcing bar, cooling water pipe and monitoring instrument etc. is also more convenient construction, saves the duration.
Detailed description of the invention
Fig. 1 is the cross-sectional view along water (flow) direction gravity dam；
Fig. 2 is the cross-sectional view along Dam Base Surface；
Fig. 3 is the cross-sectional view along the second horizontal drain pipe；
Components, position and number in figure: the dam foundation 1, dam body 2, vertical drainage hole 3, vertical drainage pipe 4, first level row
Water pipe 5, the second horizontal drain pipe 6, downstream dam site 7, consolidation grouting hole 8, dowel 9.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of Gravity Dam Foundation discharge structure, including vertical drainage hole 3, vertical drainage hole 3
It is arranged in the dam foundation 1, the one end part in vertical drainage hole 3 is on the foundation plane of the dam foundation 1, further including vertical drainage pipe 4, the first water
Flat raft water pipe 5, the second horizontal drain pipe 6, vertical drainage pipe 4, first level drainpipe 5, the second horizontal drain pipe 6 are arranged at
In dam body 2；
First level drainpipe 5 is located on the foundation plane of the dam foundation 1, and the outlet of first level drainpipe 5 is located at downstream dam
The outside of location 7,4 one end of vertical drainage pipe are connected with vertical drainage hole 3, and the other end is connected with the second horizontal drain pipe 6, the
The outlet of two horizontal drain pipes 6 is located at the outside of downstream dam site 7.The surface infiltration of the dam foundation 1 is discharged by first level drainpipe 5
Outside dam body 2, successively vertically dam body 2 is discharged in drainage hole 3, vertical drainage pipe 4, the second horizontal drain pipe 6 for the interior infiltration of the dam foundation 1
Outside.
The construction method of above-mentioned Gravity Dam Foundation discharge structure, comprising the following steps:
A, first level drainpipe 5 is laid on the foundation plane of the dam foundation 1, the outlet of first level drainpipe 5 is located at downstream
The outside of dam site 7；
B, vertical drainage hole 3 is bored downwards from the foundation plane of the dam foundation 1, until 1 deep rock mass of the dam foundation；
C, pre-buried vertical drainage pipe 4, the second horizontal drain pipe 6, make one end of vertical drainage pipe 4 and 3 phase of vertical drainage hole
Connection, the other end are connected with the second horizontal drain pipe 6, and the outlet of the second horizontal drain pipe 6 is located at the outer of downstream dam site 7
Side；
D, the casting concrete dam body 2 on the foundation plane of the dam foundation 1, vertical drainage pipe 4, first level drainpipe 5, the second water
Flat raft water pipe 6 is arranged in dam body 2.
As it can be seen that discharge structure and its construction method of the invention can reduce the setting of gallery in dam body 2, reduce to gallery
Requirement, reduce the dosage of reinforcing bar, convenient for constructing and reducing costs, also reduce the destruction to 2 local stress of dam body, lead to
Pre-buried vertical drainage pipe 4, the second horizontal drain pipe 6 are crossed, can be punched to avoid in the concrete dam body 2 poured, from
And the damage to dam body 2, reinforcing bar, cooling water pipe and monitoring instrument etc. is reduced, it is also more convenient construction, saves the duration.
Specifically, before casting concrete dam body 2, need to boring consolidation grouting hole 8 on the dam foundation 1, the later period to the dam foundation 1 into
Row is reinforced, and the damage or blocking generated when in order to reduce strengthening construction to vertical drainage hole 3, first level drainpipe 5 should be with
The consolidation grouting hole 8 being arranged on the dam foundation 1 mutually staggers.For example, again as shown in Fig. 2, consolidation fills on the foundation plane of the dam foundation 1
Starch hole 8 use square arrangement, first level drainpipe 5 accordingly use square arrangement, only rectangular consolidation grouting hole 8 with it is rectangular
First level drainpipe 5 mutually stagger.Meanwhile in order to prevent casting concrete dam body 2 when cause first level drainpipe 5 move
Position, first level drainpipe 5 are fixed on the foundation plane of the dam foundation 1 by dowel 9.
When in order to avoid casting concrete dam body 2, cement grout blocks vertical drainage pipe 4, first level drainpipe 5 and the
Two horizontal drain pipes 6 are provided with guarantor in the outer surface of vertical drainage pipe 4, first level drainpipe 5, the second horizontal drain pipe 6
Sheath, protective layer preferably use geotextiles at low cost, that is to say and are drained vertical drainage pipe 4, first level by geotextiles
Pipe 5, the second horizontal drain pipe 6 wrap, especially joint area, and in addition to being wrapped with geotextiles, galvanized wire progress also can be used
It ties up.
By being obtained in a large number of experiments and practice, in order to which more swimmingly the interior infiltration of the dam foundation 1 is successively vertically drained
Hole 3, vertical drainage pipe 4, the second horizontal drain pipe 6 are discharged outside dam body 2, and the height of vertical drainage pipe 4 is 1-3m.
Claims (10)
1. a kind of Gravity Dam Foundation discharge structure, including vertical drainage hole (3), vertical drainage hole (3) are arranged in the dam foundation (1),
The one end part in vertical drainage hole (3) is on the foundation plane of the dam foundation (1), it is characterised in that: further includes vertical drainage pipe (4),
One horizontal drain pipe (5), the second horizontal drain pipe (6), vertical drainage pipe (4), first level drainpipe (5), the second horizontal row
Water pipe (6) is arranged in dam body (2)；
First level drainpipe (5) is located on the foundation plane of the dam foundation (1), and the outlet of first level drainpipe (5) is located at downstream
The outside of dam site (7), vertical drainage pipe (4) one end are connected with vertical drainage hole (3), the other end and the second horizontal drain pipe
(6) it is connected, the outlet of the second horizontal drain pipe (6) is located at the outside of downstream dam site (7).
2. a kind of Gravity Dam Foundation discharge structure as described in claim 1, it is characterised in that: first level drainpipe (5) with
The consolidation grouting hole (8) being arranged on the dam foundation (1) mutually staggers.
3. a kind of Gravity Dam Foundation discharge structure as described in claim 1, it is characterised in that: first level drainpipe (5) is logical
Dowel (9) is crossed to be fixed on the foundation plane of the dam foundation (1).
4. a kind of Gravity Dam Foundation discharge structure as described in claim 1, it is characterised in that: vertical drainage pipe (4), the first water
Flat raft water pipe (5), the second horizontal drain pipe (6) outer surface be provided with protective layer.
5. a kind of Gravity Dam Foundation discharge structure as described in Claims 1-4 any one, it is characterised in that: vertical drainage
The height for managing (4) is 1-3m.
6. the construction method of Gravity Dam Foundation discharge structure, it is characterised in that: the following steps are included:
A, first level drainpipe (5) are laid on the foundation plane of the dam foundation (1), under the outlet of first level drainpipe (5) is located at
Swim the outside of dam site (7)；
B, vertical drainage hole (3) are bored downwards from the foundation plane of the dam foundation (1)；
C, pre-buried vertical drainage pipe (4), the second horizontal drain pipe (6) make one end and vertical drainage hole of vertical drainage pipe (4)
(3) it is connected, the other end is connected with the second horizontal drain pipe (6), and the outlet of the second horizontal drain pipe (6) is located at downstream dam
The outside of location (7)；
D, casting concrete dam body (2) on the foundation plane of the dam foundation (1), vertical drainage pipe (4), first level drainpipe (5),
Two horizontal drain pipes (6) are arranged in dam body (2).
7. the construction method of Gravity Dam Foundation discharge structure as claimed in claim 6, it is characterised in that: in step a, be laid with
First level drainpipe (5) mutually staggered with consolidation grouting hole (8) on the dam foundation (1) is arranged.
8. the construction method of Gravity Dam Foundation discharge structure as claimed in claim 6, it is characterised in that: in step a, be laid with
First level drainpipe (5) be fixed on the foundation plane of the dam foundation (1) by dowel (9), and set on first level drainpipe (5)
It is equipped with protective layer.
9. the construction method of Gravity Dam Foundation discharge structure as claimed in claim 6, it is characterised in that: pre-buried in step c
Vertical drainage pipe (4), the second horizontal drain pipe (6) outer surface be provided with protective layer.
10. the construction method of Gravity Dam Foundation discharge structure as claimed in claim 6, it is characterised in that: in step c, erect
It is 1-3m to the height of drainpipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910694723.9A CN110359430A (en) | 2019-07-30 | 2019-07-30 | A kind of Gravity Dam Foundation discharge structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910694723.9A CN110359430A (en) | 2019-07-30 | 2019-07-30 | A kind of Gravity Dam Foundation discharge structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110359430A true CN110359430A (en) | 2019-10-22 |
Family
ID=68222216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910694723.9A Pending CN110359430A (en) | 2019-07-30 | 2019-07-30 | A kind of Gravity Dam Foundation discharge structure |
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| Country | Link |
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| CN (1) | CN110359430A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997080A (en) * | 2020-09-09 | 2020-11-27 | 郭云美 | Gravity dam foundation drainage structure and implementation method thereof |
| CN112695792A (en) * | 2020-12-22 | 2021-04-23 | 中国水利水电第三工程局有限公司 | Concrete dam section foundation pit drainage and dam foundation pouring method thereof |
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| CN112695792A (en) * | 2020-12-22 | 2021-04-23 | 中国水利水电第三工程局有限公司 | Concrete dam section foundation pit drainage and dam foundation pouring method thereof |
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