CN209636839U - Concrete gravity dam drain in dam foundation pore structure - Google Patents
Concrete gravity dam drain in dam foundation pore structure Download PDFInfo
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- CN209636839U CN209636839U CN201920079800.5U CN201920079800U CN209636839U CN 209636839 U CN209636839 U CN 209636839U CN 201920079800 U CN201920079800 U CN 201920079800U CN 209636839 U CN209636839 U CN 209636839U
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Abstract
The utility model discloses propose a kind of concrete gravity dam dam base drainage well, influence of the gallery arrangement to drainage effect is reduced, drain in dam foundation ability is improved, reduces Uplift, and during uplift pressure monitoring instrument is damaged or is repaired, the interim observing function of uplift pressure is had concurrently.A kind of concrete gravity dam drain in dam foundation pore structure of the utility model, including the dam foundation and gravity dam, gallery is arranged in the gravity dam, grout curtain is arranged in the gallery upstream in gravity dam, the gallery includes slope section and riverbed bottom level section, horizontal drainage channel is arranged in the slope section of gallery, and vertical drainage hole is arranged in the riverbed bottom level section of gallery, and oblique drainage hole is arranged in the bound fraction between gallery slope section and riverbed bottom level section.
Description
Technical field
The utility model relates to a kind of concrete gravity dam dam base drainage wells based on Dam Foundation Seepage characteristic arrangement.It is suitable for
Concrete gravity dam drain in dam foundation and uplift pressure temporarily monitor, and are particularly suitable for the high steep concrete gravity dam engineering of bank slope.
Background technique
One of an important factor for concrete gravity dam Uplift is influence dam stability, stress, particularly with bank slope
Monolith, uplift pressure are affected to the lateral stability of dam.Therefore, the dam foundation is effectively reduced under the premise of guaranteeing anti-seepage effect to raise
The stability of dam can be improved in pressure.Concrete gravity dam upstream carries out Anti-seeping technology using grout curtain at present, in order into one
Step reduces uplift pressure, in curtain arranged downstream drainage hole, forms the antiseepage drainage system of " preceding stifled heel row ".According to specification, for
The entity gravity dam of curtain and drainage hole is set, and river bed dam section dam foundation osmotic pressure strength factor is 0.25, and abutment sections are
0.35, this control standard is also the control standard obtained according to current built concrete gravity dam engineering measurement statistics.
The outlet of concrete gravity dam dam base drainage well is normally in dam corridor, and the arrangement of gallery is required control by current
System, the gradient must not be suddenly in 1:1.0.The engineering steep for some side slopes, when the comprehensive slope ratio of bank slope section dam foundation side slope is suddenly in 1:
When 1.0, the region of a triangle will be formed between gallery bottom and the dam foundation, in the area, drainage hole exit site and dam
Base portion position height difference is larger.When drainage hole uses free-draining, biggish hydraulic pressure will form in drainage hole, drainage effect is poor, leads
Cause the uplift pressure at the position larger, osmotic pressure strength factor even more than standardizes defined limit value, unfavorable to dam stability.For
It solves the problems, such as that this needs to adjust the arrangement of gallery, such as increases horizontally disposed gallery, and pass through bypass gallery and Main Corridor
Road linking, or layering are arranged gallery and are connected by vertical shaft, but are arranged so and obviously are unfavorable for constructing, especially for stone roller
Concrete gravity dam is pressed, and some engineerings, because other structures arrangement requires, there is no too many space layout gallerys.Therefore,
Based on leakage of dam foundation Field distribution characteristic, the arrangement of dam base drainage well is innovated, influences its drainage effect by gallery arrangement, for
Simplify dam structure, facilitates construction that there is positive meaning.
Utility model content
The utility model be in order to solve it is in the prior art in view of the above problems, propose a kind of to seep based on the dam foundation
The concrete gravity dam dam base drainage well of properties of flow arrangement reduces influence of the gallery arrangement to drainage effect, improves drain in dam foundation
Ability reduces Uplift, and during uplift pressure monitoring instrument is damaged or is repaired, has uplift pressure concurrently and temporarily observe function
Energy.
To achieve the above object, the utility model uses following technical scheme:
A kind of concrete gravity dam drain in dam foundation pore structure of the utility model, including the dam foundation and gravity dam, the gravity
Arrange that grout curtain is arranged in the gallery upstream in gallery, gravity dam in dam, the gallery includes slope section and riverbed bottom water
Horizontal drainage channel is arranged in flat section, the slope section of gallery, and vertical drainage hole, gallery slope section is arranged in the riverbed bottom level section of gallery
Oblique drainage hole is arranged in bound fraction between riverbed bottom level section.
Preferably, the horizontal drainage channel height difference 10~15m of spacing, horizontal drainage channel enters petrosal foramen depth between 5m and this
Between the half of position curtain horizontal depth.
Preferably, the vertical drainage hole 2~3m of pitch-row, the petrosal foramen depth that enters in vertical drainage hole is that corresponding site curtain is deep
The half of degree.
Preferably, tiltedly one layer of oblique drainage hole is at least arranged in lower section in each cross section of the dam foundation of drainage hole arrangement range,
Oblique drainage hole enters the half that petrosal foramen depth is corresponding site curtain depth.
Preferably, the gallery is provided with gutter, in the horizontal drainage channel, vertical drainage hole (5) and tiltedly draining
The aperture installation steel pipe in hole is connected to the gutter of gallery.
Preferably, the horizontal drainage channel, vertical drainage hole and oblique drainage hole are provided with pressure gauge and valve.
Preferably, the drainage hole aperture of the horizontal drainage channel, vertical drainage hole and oblique drainage hole is 110mm or so,
Aperture to be biased to 5-10 ° of downstream.
The utility model provides a kind of construction method of concrete gravity dam drain in dam foundation pore structure, the method packet simultaneously
Include following steps:
Step 1, it is arranged according to gravity dam structure and requires to complete dam foundation excavation, gravity dam concreting and dam foundation curtain
Grouting construction.
Step 2, it according to the water penetration of Dam Foundation Rock, anti-seepage scheme, design conditions etc., is determined by typical seepage flow field computation
The elevation interval of horizontal drainage channel arrangement, and 2 layers are no less than according to each section horizontal drainage channel, depth is between 5m and correspondence portion
The hole depth of position curtain depth half requires to carry out horizontal drainage channel layout design.
Step 3, according to horizontal drainage channel design parameter, horizontal drainage channel is drilled in the sloped sides section of gallery respectively.
Step 4, it is drilled in the riverbed horizontal segment of gallery according to the parameter of 2~3m spacing, corresponding site curtain depth half
Vertical drainage hole.
Step 5, in the Delta Region between horizontal drainage channel and vertical drainage hole, according under the dam foundation in each cross section
Side's at least one layer of drainage hole, hole depth are the requirement of the half of corresponding site curtain depth, determine the arrangement orientation of oblique drainage hole
And hole depth, and it is drilled with oblique drainage hole.
Step 6, installation steel pipe in aperture guides in aperture to gallery gutter, needs selected section to drain according to later period operation
Hole successively installs pressure gauge and valve additional.
A kind of concrete gravity dam dam base drainage well based on Dam Foundation Seepage characteristic arrangement, is divided into slope for gallery
The gallery of two section, riverbed bottom level section regions, slope section solves abutment sections dam foundation row using horizontally disposed drainage hole
Water, riverbed bottom level section gallery solve riverbed drain in dam foundation using the drainage hole arranged vertically, and on gallery slope and level
Inclined hole appropriate is arranged at the position of section handover, solves the drain in dam foundation between lateral aperture and vertical holes.
The beneficial effects of the utility model are: gallery and dam inside feature and dam body based on Dam Foundation Seepage field distribution
The relativeness of base, by the setting of horizontal drainage channel, oblique drainage hole, utmostly to reduce water column pressure in drainage hole hole,
And dam foundation infiltration is excluded with shortest path.The drainaging scheme compares traditional vertical drainage hole scheme, has drainage effect significant,
Not by gallery layout constraints, the advantage of drainage hole project amount is greatly decreased, improves dam stability, while to advanced optimize dam
Body figure, reduction dam body construction investment create conditions.Make it by installing steel pipe, pressure gauge and valve mechanism in drainage hole aperture
There is uplift pressure monitoring function under specific condition, further improve the reliability of dam operational management.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the dam base drainage well gallery slope section diagrammatic cross-section of the utility model.
Fig. 3 is the dam base drainage well gallery slope section and riverbed horizontal segment joining section diagrammatic cross-section of the utility model.
Fig. 4 is the dam base drainage well gallery riverbed horizontal segment diagrammatic cross-section of the utility model.
Fig. 5 is the interim monitoring device figure of dam foundation poplar pressure of the utility model.
In figure: 1, the dam foundation；2, gravity dam；3, gallery；4, horizontal drainage channel；5, vertical drainage hole；6, oblique drainage hole；7, curtain
Curtain；8, pressure gauge；9, valve；10, steel pipe.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and detailed description.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the 2 drain in dam foundation pore structure of a kind of concrete gravity dam of the utility model, packet
The dam foundation 1 and gravity dam 2 are included, arranges that gallery 3, gravity dam 2 are in the milk in 3 upstream of gallery setting curtain 7 in the gravity dam 2,
The gallery 3 includes slope section and riverbed bottom level section, and horizontal drainage channel 4, the riverbed of gallery 3 is arranged in the slope section of gallery 3
Vertical drainage hole 5 is arranged in bottom level section, the bound fraction setting tiltedly draining between 3 slope section of gallery and riverbed bottom level section
Hole 6.
The 4 height difference 10~15m of spacing of horizontal drainage channel, horizontal drainage channel 4 enter petrosal foramen deeply between 5m and the position curtain
Between the half of 7 horizontal depths of curtain.
5 2~the 3m of pitch-row of vertical drainage hole, vertical drainage hole 5 enter petrosal foramen depth for the one of 7 depth of corresponding site curtain
Half.
One layer of oblique drainage hole 6 is at least arranged in lower section in each cross section of the dam foundation 1, and the petrosal foramen depth that enters of oblique drainage hole 6 is corresponding
The half of 7 depth of position curtain.
As shown in figure 5, the gallery 3 is provided with gutter, in the horizontal drainage channel 4, vertical drainage hole 5 and tiltedly draining
The aperture installation steel pipe 10 in hole 6 is connected to the gutter of gallery 3.The horizontal drainage channel 4, vertical drainage hole 5 and oblique drainage hole 6
It is provided with pressure gauge 8 and valve 9.
The horizontal drainage channel 4, vertical drainage hole 5 and tiltedly the drainage hole aperture of drainage hole 6 is 110mm or so, aperture to
It is biased to 5-10 ° of downstream.
The utility model embodiment provides a kind of construction method of 2 dam foundation of concrete gravity dam, 1 drainage hole structure, the side
Method the following steps are included:
Step 1, it is arranged according to 2 structure of gravity dam and requires to complete the excavation of the dam foundation 1,2 concreting of gravity dam and the dam foundation 1
7 grouting construction of curtain.
Step 2, true by typical seepage flow field computation according to the water penetration of 1 rock mass of the dam foundation, anti-seepage scheme, design conditions etc.
Determine the elevation interval of the arrangement of horizontal drainage channel 4, and be no less than 2 layers according to each section horizontal drainage channel 4, depth is between 5m and right
The hole depth of 7 depth half of position curtain is answered to require to carry out 4 layout design of horizontal drainage channel.
Step 3, according to 4 design parameter of horizontal drainage channel, horizontal drainage channel 4 is drilled in the sloped sides section of gallery 3 respectively.
Step 4, it is bored in the riverbed horizontal segment of gallery 3 according to 2~3m spacing, the parameter of 7 depth half of corresponding site curtain
If vertical drainage hole 5.
Step 5, in the Delta Region between horizontal drainage channel 4 and vertical drainage hole 5, according to the dam foundation in each cross section
1 lower section at least one layer of drainage hole, hole depth is the requirement of the half of 7 depth of corresponding site curtain, determines the arrangement of oblique drainage hole 6
Orientation and hole depth, and it is drilled with oblique drainage hole 6.
Step 6, installation steel pipe 10 in aperture guides in aperture to 3 gutter of gallery, needs selected section according to later period operation
Drainage hole successively installs pressure gauge 8 and valve 9 additional.
A kind of described 2 dam foundation of concrete gravity dam, 1 drainage hole based on 1 seepage characteristic of dam foundation arrangement, gallery 3 is divided is
The gallery 3 of two slope section, riverbed bottom level section regions, slope section solves abutment sections dam using horizontally disposed drainage hole
Base 1 drains, and riverbed bottom level section gallery 3 solves the riverbed dam foundation 1 using the drainage hole arranged vertically and drains, and oblique in gallery 3
Inclined hole appropriate is arranged at slope and the position of horizontal segment handover, and the dam foundation 1 solved between lateral aperture and vertical holes drains.
The beneficial effects of the utility model are: inside feature based on 1 seepage field distribution of the dam foundation and dam body gallery 3 with
The relativeness of the dam foundation 1, by the setting of horizontal drainage channel 4, oblique drainage hole 6, utmostly to reduce water column in drainage hole hole
Pressure, and the dam foundation 1 is excluded with shortest path and is seeped water.The drainaging scheme compares traditional 5 scheme of vertical drainage hole, has draining effect
Fruit is significant, and not by 3 layout constraints of gallery, the advantage of drainage hole project amount is greatly decreased, and improves dam stability, while being into one
Step optimization dam body figure, reduction dam body construction investment create conditions.By installing steel pipe 10,8 and of pressure gauge in drainage hole aperture
9 structure of valve makes it have uplift pressure monitoring function under specific condition, further improves the reliability of dam operational management.
Claims (7)
1. a kind of concrete gravity dam drain in dam foundation pore structure, including the dam foundation (1) and gravity dam (2), the interior cloth of the gravity dam (2)
It sets gallery (3), gravity dam (2) is in the milk in the gallery (3) upstream setting curtain (7), characterized in that the gallery (3) includes
Horizontal drainage channel (4) are arranged in the slope section of slope section and riverbed bottom level section, gallery (3), the riverbed bottom level of gallery (3)
Oblique drainage hole is arranged in section setting vertical drainage hole (5), the bound fraction between gallery (3) slope section and riverbed bottom level section
(6)。
2. a kind of concrete gravity dam drain in dam foundation pore structure according to claim 1, characterized in that the horizontal drainage
Hole (4) height difference 10~15m of spacing, horizontal drainage channel (4) enter deep one between 5m with position curtain (7) horizontal depth of petrosal foramen
Between half.
3. a kind of concrete gravity dam drain in dam foundation pore structure according to claim 1, characterized in that the vertical drainage
Hole (5) 2~3m of pitch-row, vertical drainage hole (5) enter the half that petrosal foramen depth is corresponding site curtain (7) depth.
4. a kind of concrete gravity dam drain in dam foundation pore structure according to claim 1, characterized in that the dam foundation (1) is each
One layer of oblique drainage hole (6) is at least arranged in lower section in cross section, and the petrosal foramen depth that enters of oblique drainage hole (6) is that corresponding site curtain (7) are deep
The half of degree.
5. a kind of concrete gravity dam drain in dam foundation pore structure according to claim 1, characterized in that the gallery (3)
It is provided with gutter, steel pipe (10) are installed in the aperture of the horizontal drainage channel (4), vertical drainage hole (5) and oblique drainage hole (6)
It is connected to the gutter of gallery (3).
6. a kind of concrete gravity dam drain in dam foundation pore structure according to claim 1, characterized in that the horizontal drainage
Hole (4), vertical drainage hole (5) and oblique drainage hole (6) are provided with pressure gauge (8) and valve (9).
7. a kind of concrete gravity dam drain in dam foundation pore structure according to claim 1, characterized in that the horizontal drainage
The drainage hole aperture in hole (4), vertical drainage hole (5) and oblique drainage hole (6) is 110mm or so, and aperture is to being biased to 5-10 ° of downstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920079800.5U CN209636839U (en) | 2019-01-17 | 2019-01-17 | Concrete gravity dam drain in dam foundation pore structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920079800.5U CN209636839U (en) | 2019-01-17 | 2019-01-17 | Concrete gravity dam drain in dam foundation pore structure |
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| Publication Number | Publication Date |
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| CN209636839U true CN209636839U (en) | 2019-11-15 |
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ID=68478172
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920079800.5U Active CN209636839U (en) | 2019-01-17 | 2019-01-17 | Concrete gravity dam drain in dam foundation pore structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555150A (en) * | 2019-01-17 | 2019-04-02 | 中国电建集团华东勘测设计研究院有限公司 | Concrete gravity dam drain in dam foundation pore structure and its construction method |
-
2019
- 2019-01-17 CN CN201920079800.5U patent/CN209636839U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555150A (en) * | 2019-01-17 | 2019-04-02 | 中国电建集团华东勘测设计研究院有限公司 | Concrete gravity dam drain in dam foundation pore structure and its construction method |
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