CN109555150A - Concrete gravity dam drain in dam foundation pore structure and its construction method - Google Patents
Concrete gravity dam drain in dam foundation pore structure and its construction method Download PDFInfo
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- CN109555150A CN109555150A CN201910045875.6A CN201910045875A CN109555150A CN 109555150 A CN109555150 A CN 109555150A CN 201910045875 A CN201910045875 A CN 201910045875A CN 109555150 A CN109555150 A CN 109555150A
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- dam
- gallery
- drainage hole
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/40—Foundations for dams across valleys or for dam constructions
-
- 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
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Revetment (AREA)
Abstract
The invention discloses propose a kind of concrete gravity dam dam base drainage well and its construction method, 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 invention, 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 present invention relates to a kind of concrete gravity dam dam base drainage wells and its construction party based on Dam Foundation Seepage characteristic arrangement
Method.It is temporarily monitored suitable for concrete gravity dam drain in dam foundation and uplift pressure, is particularly suitable for the high steep concrete gravity of bank slope
Dam engineering.
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.
Summary of the invention
The present invention be in order to solve it is in the prior art in view of the above problems, propose a kind of special based on Dam Foundation Seepage
Property arrangement concrete gravity dam dam base drainage well and its construction method, reduce gallery and arrange influence to drainage effect, improve
Drain in dam foundation ability reduces Uplift, and during uplift pressure monitoring instrument is damaged or is repaired, it is interim to have uplift pressure concurrently
Observing function.
To achieve the above object, the invention adopts the following technical scheme:
A kind of concrete gravity dam drain in dam foundation pore structure of the invention, including the dam foundation and gravity dam, in the gravity dam
Arrange that grout curtain is arranged in the gallery upstream in gallery, 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, gallery slope section and river is arranged in the riverbed bottom level section of gallery
Oblique drainage hole is arranged in bound fraction between bed 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.
Present invention simultaneously provides a kind of construction method of concrete gravity dam drain in dam foundation pore structure, the method includes with
Lower step:
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 present invention are: feature and dam body inside gallery and the dam foundation based on Dam Foundation Seepage field distribution
Relativeness, by the setting of horizontal drainage channel, oblique drainage hole, utmostly to reduce water column pressure in drainage hole hole, and with
Shortest path excludes dam foundation infiltration.The drainaging scheme compare traditional vertical drainage hole scheme, have drainage effect it is significant, not by
The advantage of drainage hole project amount is greatly decreased in gallery layout constraints, improves dam stability, while to advanced optimize dam body body
Type, reduction dam body construction investment create conditions.Make it in spy by installing steel pipe, pressure gauge and valve mechanism in drainage hole aperture
There is uplift pressure monitoring function under the conditions of different, further improve the reliability of dam operational management.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is dam base drainage well gallery slope section diagrammatic cross-section of the invention.
Fig. 3 is dam base drainage well gallery slope section and riverbed horizontal segment joining section diagrammatic cross-section of the invention.
Fig. 4 is dam base drainage well gallery riverbed horizontal segment diagrammatic cross-section of the invention.
Fig. 5 is the interim monitoring device figure of dam foundation poplar pressure of the invention.
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 present invention is described further with reference to the accompanying drawings and detailed description.
As shown in Figure 1, Figure 2, Figure 3, Figure 4,2 drain in dam foundation pore structure of a kind of concrete gravity dam of the invention, including dam
Base 1 and gravity dam 2, the gravity dam 2 is interior to arrange gallery 3, and gravity dam 2 is in the milk in 3 upstream of gallery setting curtain 7, described
Gallery 3 includes slope section and riverbed bottom level section, and horizontal drainage channel 4, the riverbed bottom of gallery 3 is arranged in the slope section of gallery 3
Vertical drainage hole 5 is arranged in horizontal segment, and oblique drainage hole 6 is arranged in the bound fraction between 3 slope section of gallery and riverbed bottom level section.
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 embodiment of the present invention provides a kind of construction method of 2 dam foundation of concrete gravity dam, 1 drainage hole structure, the method packet
Include following steps:
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 present invention are: gallery 3 and the dam foundation 1 inside feature and dam body based on 1 seepage field distribution of the dam foundation
Relativeness, by the setting of horizontal drainage channel 4, oblique drainage hole 6, utmostly to reduce water column pressure in drainage hole hole,
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, aobvious with drainage effect
It writes, not by 3 layout constraints of gallery, the advantage of drainage hole project amount is greatly decreased, improve dam stability, while being further excellent
Change dam body figure, reduction dam body construction investment creates conditions.By installing steel pipe 10, pressure gauge 8 and valve 9 in drainage hole aperture
Structure makes it have uplift pressure monitoring function under specific condition, further improves the reliability of dam operational management.
Claims (8)
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), grout curtain (7) are arranged in the gallery (3) upstream in gravity dam (2), 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.
8. the construction method of concrete gravity dam drain in dam foundation pore structure described in a kind of claim 1~7 any one, special
Sign is to the described method comprises the following steps:
Step 1, it is arranged according to gravity dam (2) structure and requires to complete the dam foundation (1) excavation, gravity dam (2) concreting and dam
Base grout curtain (7) 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 horizontal
The elevation interval of drainage hole (4) arrangement, and 2 layers are no less than according to each section horizontal drainage channel (4), depth is between 5m and correspondence
The hole depth of position curtain (7) depth half requires to carry out horizontal drainage channel layout design.
Step 3, according to horizontal drainage channel (4) design parameter, horizontal drainage channel is drilled in the sloped sides section of gallery (3) respectively
(4)。
Step 4, it is bored in the riverbed horizontal segment of gallery (3) according to 2~3m spacing, the parameter of corresponding site curtain (7) depth half
Vertical drainage hole if (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
Lower section at least one layer of drainage hole, hole depth are the requirement of the half of corresponding site curtain depth, determine the arrangement of oblique drainage hole (6)
Orientation and hole depth, and it is drilled with oblique drainage hole (6).
Step 6, aperture installation steel pipe (10) guides in aperture to gallery (3) gutter, needs selected section according to later period operation
Drainage hole successively installs pressure gauge (8), valve (9) additional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045875.6A CN109555150A (en) | 2019-01-17 | 2019-01-17 | Concrete gravity dam drain in dam foundation pore structure and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045875.6A CN109555150A (en) | 2019-01-17 | 2019-01-17 | Concrete gravity dam drain in dam foundation pore structure and its construction method |
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| CN109555150A true CN109555150A (en) | 2019-04-02 |
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| CN201910045875.6A Pending CN109555150A (en) | 2019-01-17 | 2019-01-17 | Concrete gravity dam drain in dam foundation pore structure and its construction method |
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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 |
| CN115369818A (en) * | 2022-07-19 | 2022-11-22 | 中国电建集团华东勘测设计研究院有限公司 | Warehouse bank mask anti-seepage structure with foundation uplift pressure monitoring and emergency pressure relief device and construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354917A (en) * | 2017-07-28 | 2017-11-17 | 昆明理工大学 | A kind of gravity rock and its construction method |
| JP2018141301A (en) * | 2017-02-28 | 2018-09-13 | 大成建設株式会社 | Method for constructing drain drainage channel |
| CN209636839U (en) * | 2019-01-17 | 2019-11-15 | 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 |
-
2019
- 2019-01-17 CN CN201910045875.6A patent/CN109555150A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018141301A (en) * | 2017-02-28 | 2018-09-13 | 大成建設株式会社 | Method for constructing drain drainage channel |
| CN107354917A (en) * | 2017-07-28 | 2017-11-17 | 昆明理工大学 | A kind of gravity rock and its construction method |
| CN209636839U (en) * | 2019-01-17 | 2019-11-15 | 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 |
Non-Patent Citations (1)
| Title |
|---|
| 秦俊德: ""陈村大坝坝基渗压问题的探讨"", 《大坝与安全》, no. 4, pages 28 - 33 * |
Cited By (3)
| 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 |
| CN115369818A (en) * | 2022-07-19 | 2022-11-22 | 中国电建集团华东勘测设计研究院有限公司 | Warehouse bank mask anti-seepage structure with foundation uplift pressure monitoring and emergency pressure relief device and construction method |
| CN115369818B (en) * | 2022-07-19 | 2024-04-26 | 中国电建集团华东勘测设计研究院有限公司 | Reservoir bank mask seepage-proofing structure with foundation lifting pressure monitoring and emergency pressure relief device and construction method |
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