CN108035318A - The construction method of the dam body water draining structure of homogeneous earth dam - Google Patents
The construction method of the dam body water draining structure of homogeneous earth dam Download PDFInfo
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- CN108035318A CN108035318A CN201711453793.2A CN201711453793A CN108035318A CN 108035318 A CN108035318 A CN 108035318A CN 201711453793 A CN201711453793 A CN 201711453793A CN 108035318 A CN108035318 A CN 108035318A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
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- 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
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Abstract
The construction method of the dam body water draining structure of homogeneous earth dam of the present invention,Discharge structure is by sequentially connected vertical drainage body,At least one horizontal drainage bed course,Drainage prism forms,The Curtain downstream in homogeneous earth dam dam body,The vertical drainage body white-out that one of horizontal width is 1m~3m, which is formed, along longitudinal dike axis direction permeates water to vertical drainage body bottom,In downstream, drainage prism is set,At least one horizontal drainage bed course is set between vertical drainage body and downstream drainage rib body,As the contact channel between vertical drainage body and drainage prism,The method of the present invention can reduce dam seepage line height,Reduce osmotic pressure,Increase the stability against sliding of dam body downstream dam slope,So as to suitably increase the gradient of downstream dam slope,Reduce reclamation work amount,Cost is relatively low,It is easy for construction,And infiltration can be significantly reduced and meet code requirement and project cost can be saved,Reduce construction period.
Description
Technical field
The present invention relates to a kind of construction of the discharge structure of the homogeneous earth dam in the industries such as water conservancy and hydropower, mining
Method.
Background technology
Homogeneous earth dam is a kind of ancient hydraulic structure, its section is regardless of impervious body and dam shell, substantially by opposite
More uniform, the less homogenous material of infiltration coefficient is filled and formed.Whole dam body is exactly impervious body, its structure and the dam foundation, bank slope
And the contact seepage paths of concrete structure is long, it can simplify or even cancel Anti-seeping technology.It is single with filling material, process
Simply, disturbed between each operation less, is low to geological conditions requirement, the features such as low cost, meeting it is engineering design often in condition
Preferred option.But because earth material filling building accept a surrender rain shadow ring it is very big, be restricted use of this dam type in some areas of heavy rainfull.It is special
It is not the homogeneous earth dam building on the weak permeable dam foundation, if do not taken suitable drainage in dam body measure, saturation is higher in dam body, such as
Fruit saturation intersects with slope surface, and the coefficient of stability of dam slope about reduces by 50%, totally unfavorable to dam slide stabilization.To ensure dam slide stabilization,
Then necessary grading, so as to cause the increase of reclamation work amount.
It is to take Sub-region and hierarchical mode that homogeneous earth dam, which fills,.Roll exciting force act directly on it is each fill layer surface, its
Top half compactness is higher, and fine and close smooth top layer is formed on surface, and the latter half compactness is then relatively low, interlayer
There are horizontal direction low pressure solidity area, and it is soft or hard to cause dam body（Relatively）Alternate uneven texture, therefore its horizontal direction is permeable
Property be more than vertically to water penetration.
Usual homogeneous earth dam uses rib body（Slope surface）The discharge structure that draining and mattress draining are combined.When dam body is horizontal and
When vertically to identical water penetration, mattress draining can effectively reduce dam seepage line, it is this it is structure-reinforced be horizontal drainage
The effect of mattress.In view of banket after rolling along the horizontal direction water penetration of interlayer often than vertically to big, being infiltrated though setting mattress draining
Line cannot still decline rapidly, it is impossible to ensure downstream dam body（Slope）In drying regime（Saturation and bottom mattress or rib body phase
Hand over）.To reduce dam seepage line height, reducing osmotic pressure, the stability against sliding of increase dam body downstream dam slope, so as to suitably increase
The gradient of big downstream dam slope, reduces reclamation work, it is necessary to it is relatively low to seek a kind of not only cost, easy for construction, and with rib body
The homogeneous earth dam discharge structure that can significantly reduce dam seepage line is compared in draining with mattress draining.
The content of the invention
The purpose of the invention is to provide one kind to reduce dam seepage line height, reduction osmotic pressure, increase dam body
The stability against sliding of downstream dam slope, so as to suitably increase the gradient of downstream dam slope, reduces reclamation work amount, cost is low, construction party
Just, and it can meet code requirement and engineering can be saved to make with the homogeneous earth dam discharge structure for significantly reducing saturation
Valency, reduces the construction method of the dam body water draining structure of the homogeneous earth dam of construction period.
What the object of the invention was realized in that：
The construction method of the dam body water draining structure of homogeneous earth dam of the present invention, dam body water draining structure is by sequentially connected vertical drainage
Body, at least one horizontal drainage bed course（Horizontal row water body）, drainage prism composition, construction method is the dam in homogeneous earth dam dam body
Base seepage proof curtain downstream, using Thief zone coefficient filling material as met the sand of grading requirement, rubble or being capable of guide water
Organic material is formed the vertical drainage body that one of horizontal width is 1m~3m along longitudinal dike axis direction, water is permeated with white-out to vertical
Displacement hull bottom, drainage prism is set in downstream, and at least one level is set between vertical drainage body and downstream drainage rib body
Drainage blanket, as the contact channel between vertical drainage body and drainage prism, to ensure that infiltration water smoothly drains into downstream.
Above-mentioned vertical drainage body is by vertical drainage layer, respectively positioned at the vertical loaded filter of the upper and lower both sides of vertical row's filtering layer
Composition, horizontal reverse filtering layer of the horizontal drainage bed course by horizontal row water layer, respectively positioned at the upper and lower both sides of horizontal row water layer are formed, arranged
Water rib body is by draining loaded filter and rolls rear enrockment and forms.
Above-mentioned horizontal drainage bed course is two, between vertical drainage and drainage prism, sets two drainage channels（Row
Arnott's bed pad）, ensure that dam body infiltration unobstructed can be discharged into downstream.After discharge structure change, downstream three-level dam slope divides from top to bottom
For：1:2.5、1:2.5、1:2.0.The height of corresponding drainage prism is significantly reduced.
In homogeneous earth dams vertically different from horizontal direction permeability, existing reinforcing mattress draining（It is horizontally disposed）Structure
It cannot meet the requirements, it is necessary to strengthen the effect of vertical drainage body, horizontal drainage bed course is only drainage channel.It is more equal by calculating
Matter dam and clay core wall rockfill dam seepage field find that in clay core wall rockfill dam seepage field streamline enters rockfill area through core-wall
After reduce rapidly, level of tail water elevation is down in very short horizontal distance.Its main cause be because rockfill area infiltration coefficient compared with
Greatly（About 1~5 × 10-25000~10000 times of cm/s, about clay core-wall）.The present invention specific location can be set in dam body
The packing area of one layer of certain thickness big infiltration coefficient（Or other are capable of the organic material of guide water）Formed top-down perpendicular
To drainage channel, by seepage water guide to downstream, ensureing that cope level is higher than the infiltration of corresponding section at drainage channel setting
The drainability of line and drainage channel be more than whole dam body seepage discharge when, it is ensured that drainage channel downstream dam body be in compared with
Drying regime, so as to fulfill the present invention.
The method of the present invention can reduce dam seepage line height, reduce osmotic pressure, and the antiskid of increase dam body downstream dam slope is steady
It is qualitative, so as to suitably increase the gradient of downstream dam slope, reduce reclamation work amount, cost is relatively low, easy for construction, and can have aobvious
The homogeneous earth dam discharge structure for reducing saturation is write so as to meet code requirement and project cost can be saved, reduces construction period
Homogeneous earth dam.
Brief description of the drawings
Fig. 1 is dam body water draining structure floor map of the present invention.
Fig. 2 is dam body water draining structure profile of the present invention.
Fig. 3 is homogeneous earth dam drainage path illustraton of model.
Embodiment
Referring to Fig. 1 ,~Fig. 3, the construction method of the dam body water draining structure of the present embodiment homogeneous earth dam, dam body water draining structure by
Sequentially connected vertical drainage body 1, two horizontal drainage bed course 2, drainage prism 3 form.Construction method is on homogeneous earth dam dam
Internal Curtain downstream, Thief zone coefficient filling material such as meet the sand of grading requirement, rubble（Or being capable of guide
The organic material of water）Vertical drainage body 1 that one horizontal width is 2 is formed along longitudinal dike axis direction, and water is permeated to vertical with white-out
Displacement hull bottom.Set drainage prism 3. that two horizontal drainages are set between vertical drainage body and downstream drainage rib body in downstream
Bed course 2, downstream is smoothly drained into as the contact channel between vertical drainage body and drainage prism to ensure to permeate water.
Vertical drainage body is by the sandstone material for meeting anti-filter and water-flowing amount requirement or organic earth working material（Or it is the two knot
Close）Form, by 1-2 two vertical loaded filter 1-1, vertical drainage layer part components.Its main function is to block infiltration
Path, changes seepage direction, and will permeate water from dam body top white-out to displacement hull bottom using itself high osmosis.It is wherein perpendicular
Ensure that carrying adjacent clay particle with vertical drainage is not lost in loaded filter.Ensure drainage blanket continuous and effective；Vertical drainage layer is made
Water is permeated with for white-out.
Horizontal drainage bed course connects vertical drainage body and draining rib by meeting that anti-filter and the sandstone of water-flowing amount requirement form
Body.Wherein effect be will infiltration year river downstream drained into by vertical drainage body bottom.It is divided into horizontal reverse filtering layer 2-1 and level
The two parts of drainage blanket 2-2, act on vertical loaded filter and vertical drainage layer.
Drainage prism is by loaded filter 3-1 and rolls rear enrockment 3-2 and form, its main function has two, first, exclusion dam
Body seeps water；Second, protection downstream slope surface.
The mattress discharge structure of effect from strengthening horizontal row Arnott's bed pad is different, homogeneous earth dam dam body water draining structure of the present invention
Strengthen the effect of vertical drainage body, horizontal drainage bed course is only drainage channel.It must is fulfilled for the following conditions：First, displacement hull erects
Dam infiltration requirement is disclosure satisfy that to horizontal direction water-flowing amount；Second, displacement hull elevation of top surface necessarily be greater than section part saturation height
Degree, ensures that seepage water can enter in vertical drainage body；Third, displacement hull must be provided with filter protection layer, ensure that displacement hull is permanent
Effectively；Fourth, vertical white-out body must ensure that draining is smooth with the effective unicom of horizontal drainage bed course of bottom.
Homogeneous earth dam dam body water draining structure fills the horizontal drainage bed course of bottommost first in the present embodiment；Drainage prism and
Layered rolling fills vertical drainage body at the same time with whole dam.Implementation is as follows:
1st, horizontal drainage bed course：
Horizontal drainage bed course presses horizontal drainage structure composition, first construction in layer bottom level filtering layer.Its individual layer filling-up thickness, model
Enclose and determined according to result of the test and site specific, carry out testing inspection after being rolling bulldozed, meet the requirements and carry out last layer again
Construction.Horizontal reverse filtering layer completes construction level drainage blanket again according to design and construction, then the level at the top of construction level drainage blanket
Loaded filter.Whole horizontal drainage cushion construction is completed just fill the clay filler at the top of it.
2nd, drainage prism：
Drainage prism is generally with horizontal drainage bed course and clay material construction in layer.In each layering, draining rib is filled first
Body, then fills anti-filter（Transition）Material, then fill earth material.It is required that earth material, anti-filter（Transition）Material rolls at the same time.Pay attention in construction each
The differentiation of kind filler and structure size, avoid mixing.
3rd, vertical drainage body：
Vertical drainage body placement in layers together with clay.Upstream side earth material is filled first, is then filled adjacent with upstream side earth material
Filter material, be displacement hull and the filter material in downstream successively, finally fill the soil adjacent with vertical drainage body downstream filter material
Material.Displacement hull rolls at the same time with earth material.Before the filling of the vertical drainage body adjacent with bank slope, the processing of bank slope must is fulfilled for will
Ask, and ensure to roll quality.
This homogeneous earth dam dam body water draining structure strengthens the effect of vertical drainage body, and horizontal drainage bed course is only drainage channel.
Its operation principle is that vertical drainage body blocks permeation pathway, infiltration water is dredged to vertical drainage body bottom, and pass through horizontal row
Water subfill drains into downstream river course.Have it is simple in structure, it is easy for construction, can not only accelerate construction progress but also can save and be constructed into
Originally the characteristics of, reducing project cost.
Various engineering performances amounts after contrasting discharge structure before changing, the economic benefits comparison produced after structure change are bright
It is aobvious.Various engineering performances amount contrasts are shown in Table 1.
Table 1：
Above-described embodiment is that the above of the present invention is further described, but this should not be interpreted as to the above-mentioned master of the present invention
The scope of topic is only limitted to above-described embodiment.It is all that the scope of the present invention is belonged to based on the technology that the above is realized.
Claims (3)
1. the construction method of the dam body water draining structure of homogeneous earth dam, it is characterised in that dam body water draining structure is by sequentially connected vertical
Displacement hull, at least one horizontal drainage bed course, drainage prism composition, construction method is the seepage prevention of dam founda curtain in homogeneous earth dam dam body
Curtain downstream uses Thief zone coefficient filling material or is capable of the organic material of guide water, and one of water is formed along longitudinal dike axis direction
Vertical drainage body that flat width is 1m~3m, with white-out permeate water to vertical drainage body bottom, and drainage prism is set in downstream,
At least one horizontal drainage bed course is set between vertical drainage body and downstream drainage rib body, as vertical drainage body and drainage prism
Between contact channel, ensure infiltration water smoothly drain into downstream.
2. the construction method of the dam body water draining structure of homogeneous earth dam according to claim 1, it is characterised in that vertical drainage
Vertical loaded filter of the body by vertical drainage layer, respectively positioned at the upper and lower both sides of vertical drainage layer forms, and horizontal drainage bed course is by level
Drainage blanket, the horizontal reverse filtering layer respectively positioned at the upper and lower both sides of horizontal row water layer form, and drainage prism is by draining loaded filter and rolls
Enrockment forms afterwards.
3. the construction method of the dam body water draining structure of homogeneous earth dam according to claim 1 or 2, it is characterised in that horizontal row
Water subfill is two.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109750655A (en) * | 2018-12-19 | 2019-05-14 | 中国水利水电第五工程局有限公司 | A kind of homogeneous earth dam axis of dam downstream vertical row water layer and construction method |
| CN112252273A (en) * | 2020-10-28 | 2021-01-22 | 中国有色金属工业西安勘察设计研究院有限公司 | Method for preventing and treating tailing sand leakage in tailing pond dam body |
| CN116065539A (en) * | 2023-02-14 | 2023-05-05 | 中国电建集团西北勘测设计研究院有限公司 | Dam body drainage structure of hundred-meter-level homogeneous soil dam high downstream water level |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109750655A (en) * | 2018-12-19 | 2019-05-14 | 中国水利水电第五工程局有限公司 | A kind of homogeneous earth dam axis of dam downstream vertical row water layer and construction method |
| CN112252273A (en) * | 2020-10-28 | 2021-01-22 | 中国有色金属工业西安勘察设计研究院有限公司 | Method for preventing and treating tailing sand leakage in tailing pond dam body |
| CN116065539A (en) * | 2023-02-14 | 2023-05-05 | 中国电建集团西北勘测设计研究院有限公司 | Dam body drainage structure of hundred-meter-level homogeneous soil dam high downstream water level |
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