CN206173879U - Gravity dam construction diversion structure - Google Patents
Gravity dam construction diversion structure Download PDFInfo
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- CN206173879U CN206173879U CN201621178625.8U CN201621178625U CN206173879U CN 206173879 U CN206173879 U CN 206173879U CN 201621178625 U CN201621178625 U CN 201621178625U CN 206173879 U CN206173879 U CN 206173879U
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- Prior art keywords
- gravity dam
- diversion
- cofferdam
- construction
- canal
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Abstract
The utility model discloses a gravity dam construction diversion structure. Gravity dam construction diversion structure is including setting up the water conservancy diversion bottom outlet in gravity dam bottom portion, the first phase transverse cofferdam, it sets up on the tributary at the gravity dam upper reaches, the second stage of transverse cofferdam, it sets up on the main river at the gravity dam upper reaches, and longitudinal cofferdam, its head -end set up and locate on the main river and the bank slope that intersects in tributary to and diversion canal, two rivers in main river and the tributary at the diversion canal intercommunication gravity dam upper reaches make the diversion canal realize two -way overflowing during gravity dam stage construction. The utility model discloses construction cost has greatly been reduced.
Description
Technical field
This utility model is a kind of gravity dam construction diversion structure, is primarily adapted for use in Hydraulic and Hydro-Power Engineering, and dam site is located at river
The mountain area miniature gravity dam engineering of stream intersection part.
Background technology
Dam site is located at the gravity dam construction of river course intersection part and typically adopts stage diversion, based on point Second Construction.Lead
Lumen canal arrangement typically carries out water conservancy diversion using bealock, small stream ditch and girt etc., and open channel arrangement need to be connected water inlet and go out flowing water stream,
It is disadvantageous in that diversion canal is only unidirectional excessively stream using requirements above open channel, as a phase gravity dam construction diversion, two
Phase has discarded when constructing, it is impossible to reuse, and is to ensure gravity dam Second Construction, and river course water has been constructed by opposite side
Into a phase gravity dam bottom outlet excessively stream, now need to build relatively large cofferdam in the second stage of gravity dam upstream, construction work amount is big and work
Wall losses is more, meanwhile, general second phase gravity dam construction completes construction road in back court and has removed or flooded, is unfavorable for the second phase
Slag tap after cofferdam demolition.
Chinese invention patent application CN201210449599.8 discloses a kind of wide riverbed dam-type power plant water conservancy diversion construction party
Method, its step is as follows：A, first build diversion structure in river course side；B, diversion structure is built simultaneously, in river course opposite side
Riverbed carries out Temporary Cofferdam construction；C, treat that Temporary Cofferdam and riverbank surround water pumping and drainage of foundation pit, carry out after the completion of Temporary Cofferdam construction
The construction of gravity dam；D, diversion structure possess after excessively stream condition, extend Temporary Cofferdam Upstream section and tract to river course opposite bank,
Form the main cofferdam in upstream and the main cofferdam in downstream；E, water-pumping/draining is carried out to foundation ditch between the main cofferdam in the main cofferdam in upstream and downstream form dry
Ground construction environment；The full-scale construction of gravity dam or Factory Building is carried out between f, the main cofferdam in the main cofferdam in upstream and downstream.The patent is suitable for
The Project Layout Design of One arranged using stage diversion mode in wide riverbed dam-type power plant and construction, it is impossible to be suitable for dam site and be located at river
The situation of road intersection.
Utility model content
This utility model aims to provide a kind of gravity dam construction diversion structure, the diversion canal bidirectional flow of the flow-guiding structure
Logical, the diversion canal is built by stages with reference to (main river and tributary) in the river of downstream both sides during gravity dam one, Second Construction
Transverse cofferdam can reach the purpose of recycling, it is possible thereby to greatly reduce construction cost.
For achieving the above object, the technical solution adopted in the utility model is：
A kind of gravity dam construction diversion structure, it is structurally characterized in that, including
It is arranged on the bottom diversion outlet of gravity dam bottom；
One phase transverse cofferdam, it is arranged on the tributary of gravity dam upstream,
The second stage of transverse cofferdam, it is arranged on the main river of gravity dam upstream,
Longitudinal cofferdam, its upstream end is arranged on the intersecting at bank slope of main river and tributary, and
Diversion canal；
The main river and tributary Liang Tiao rivers of the diversion canal connection gravity dam upstream, makes diversion canal in gravity dam point
Construction period phase realizes bidirectional flow-through.
Construction cofferdam of the present utility model is built in the downstream river close to diversion canal, and cofferdam reclamation work amount is notable
Reduce, also allow for being removed after the completion of construction in later period.The construction of early stage temporary project not only can be simplified using the construction diversion structure
Program, accelerates engineering construction speed, while being conducive to later stage transverse cofferdam to remove, reduces construction cost
According to embodiment of the present utility model, further optimization can also be made to this utility model, below for optimization after
The technical scheme of formation：
Embodiments in accordance with the present invention, the import and export of the diversion canal are horizontal close to the phase transverse cofferdam and second phase
Cofferdam.
Further, the gradient that the diversion canal excavates molding is flat slope.It is preferred that the Slope ratio of the diversion canal
For 1：0.3-1：1.0.The Slope ratio of more preferably described diversion canal is 1：0.4-1：0.6.
Preferably, the transverse section of the diversion canal is trapezoidal cross-section, rectangular cross section or compound cross-section.
Preferably, the weir crest of the phase transverse cofferdam and the second stage of transverse cofferdam is higher than more than ordinary water level 0.5m.
According to two preferred embodiments of the present utility model, wall is directly led in the downstream of the longitudinal cofferdam with gravity dam
It is connected, or the downstream of longitudinal cofferdam is connected by leading wall with gravity dam.
According to the 3rd preferred embodiment of the present utility model, the downstream of the longitudinal cofferdam directly with gravity dam phase
Even.
Thus, the main river and tributary Liang Tiao rivers of diversion canal connection gravity dam upstream, in gravity dam construction period, point
Not in open channel import and export staged-filling transverse cofferdam, change the direction of a stream of water, make open channel two-way during gravity dam stage construction
Excessively stream is (during current flow to main river, the second stage of foundation pit construction during one phase of gravity dam foundation pit construction by tributary in diversion canal
By main river influent), while (leading positioned at the longitudinal cofferdam that main river intersects at bank slope with tributary with the upstream end filled
Wall) it is engaged to ensure gravity dam left and right banks foundation ditch dry work.
Compared with prior art, the beneficial effects of the utility model are：
Compared with existing construction diversion structure, the practice of this utility model incorporation engineering is creatively proposed in gravity dam
First, diversion canal can reach the mesh of bidirectional flow-through with reference to the cofferdam built in the river course of downstream both sides by stages during Second Construction
, while construction cofferdam is built in the downstream river close to open channel, cofferdam reclamation work amount is reduced.Using the construction method not
Early stage temporary project operational procedure can only be simplified, accelerate engineering construction speed, greatly reduce temporary project construction cost, and
And be conducive to later stage cofferdam demolition.
Description of the drawings
Fig. 1 is a kind of typical flow-guiding structure schematic diagram of the present utility model (dam site is located at Liang He intersections downstream)；
Fig. 2 is another typical flow-guiding structure schematic diagram of the present utility model (dam site is located at Liang He intersections)；
Fig. 3 is another typical flow-guiding structure schematic diagram of the present utility model (dam site is located at Liang He intersections upstream).
In figure：
1- bottom diversion outlets；2- leads wall；3- longitudinal cofferdams；4- mono- phase transverse cofferdams；5- second phase transverse cofferdams；6- water conservancy diversion is bright
Canal.
Specific embodiment
Below with reference to accompanying drawing and in conjunction with the embodiments describing this utility model in detail.It should be noted that not conflicting
In the case of, the feature in embodiment and embodiment in this utility model can be mutually combined.For sake of convenience, hereinafter such as
Occur " on ", D score, "left", "right" printed words, only represent it is consistent with the upper and lower, left and right direction of accompanying drawing itself, not to structure
Play restriction effect.
A kind of gravity dam construction diversion structure, as Figure 1-3, makes the diversion canal can be with two-way in gravity dam construction period
Excessively stream, the method can be greatly lowered training works construction work amount, while it is easy to later stage cofferdam demolition, to reduce engineering
Cost, simplifies temporary project construction content, the purpose of reduction of erection time.Two rivers of the diversion canal connection gravity dam upstream
(main river and tributary), in gravity dam construction period, respectively at diversion canal outlet downstream a phase and the second stage of transverse cofferdam is filled,
(current flow to main river, Second Construction during gravity dam first stage construction by tributary in diversion canal to change channel water stream direction
Period is by main river influent), while enclosing positioned at the longitudinal direction that main river intersects at bank slope with tributary with the upstream end filled
Weir is engaged, to ensure dry work in gravity dam left and right banks foundation ditch；It is flat slope that the diversion canal longitudinally excavates the molding gradient
(or close flat slope, head fall ≈ 0)；The cofferdam can adopt knitting bagged to excavate the small-sized clay core wall cofferdam that waste heap is built
Form (4,5 grades of buildings), weir crest is higher than more than open channel design water level 0.5m.This utility model is applied to dam site and hands over positioned at river
The mountain area miniature gravity dam engineering at remittance position.
Main points of arrangement of the present utility model is as follows：
First, diversion canal arrangement
Diversion canal need to connect the main river and tributary Liang Tiao rivers of gravity dam upstream, and diversion canal longitudinally excavates molding slope
Spend for flat slope (or close flat slope, head fall ≈ 0).
2nd, cofferdam arrangement
Transverse cofferdam is arranged in diversion canal import downstream, and as close possible to diversion canal position, longitudinal cofferdam are imported and exported
Upstream end is located at the intersecting at bank slope of main river and tributary, and open channel cutting depth is more than more than diversion canal design water level 0.5m,
The small-sized clay core wall cofferdam (4,5 grades of buildings) that rock ballast heap is built is excavated in cofferdam using knitting bagged, and weir crest is higher than diversion Design
More than water level 0.5m.
3rd, diversion canal form of fracture is selected and diversion Design water level is calculated
The form of fracture of open channel is typically chosen trapezoidal cross-section, may be used also according to landform and geological conditions (i.e. stability of slope requirement)
Select rectangle and compound cross-section.
For the trapezoidal diversion canal, the depth of water is iterated to calculate using following formula：
H in formulakm- critical depth of water ratio, hkm=hk/b；
hk- critical depth of water；
B-open channel bottom width；
M-section slope coefficient；
Q-diversion Design flow.
For flat slope open channel, the depth of water adopts hk, above formula hkmInitial value is brought into 1.0, and by 2~3 iteration result can be obtained.
Thereby determine that (open channel slope is pushed up and cofferdam weir crest is above open channel design water level for diversion canal depth and cofferdam height h
0.5m)：
H=hk+0.5；
The slope ratio of diversion canal side slope is selected according to landform and geological conditions, and value is 1：0.3-1：1.0.
The construction period arranges as follows：
S1, diversion canal 6 were excavated before gravity dam first stage construction starts；
S2, longitudinal cofferdam 3 fill build and complete before gravity dam first stage construction；
Downstream is imported and exported before S3, gravity dam main body construction in tributary Inner guide open channel 6 to pass in and out as close to diversion canal
A phase transverse cofferdam 4 is built at mouthful, makes current in tributary enter main river by diversion canal 6, by the non-construction area of gravity dam, protected
Dry work in card one phase of gravity dam foundation ditch；
S4, gravity dam first stage construction are completed and bottom diversion outlet 1 possesses after water flowing condition, remove first stage construction cofferdam, while
Downstream is imported and exported in main river Inner guide open channel 6 build the second stage of transverse cofferdam 5 as close to diversion canal import and export, can be again
The multiple weir body material of a phase transverse cofferdam 4 using after removing, makes current in main river enter tributary by diversion canal 6, and passes through
Construct the excessively stream of a phase gravity dam bottom outlet 1 for completing in tributary downstream, it is ensured that dry work in gravity dam second phase foundation ditch；
It is direct after the completion of S5, gravity dam second phase foundation pit construction to enclose with excavator or manually by the second stage of transverse cofferdam 5 and longitudinal direction
Weir 3 is removed, and construction diversion is completed.
The content that above-mentioned calculating is illustrated not should be understood to the enforcement of clearer explanation this utility model flow-guiding structure, and not
For limiting use range of the present utility model, after this utility model has been read, those skilled in the art are new to this practicality
The modification of the various same forms of type each falls within the application claims limited range.
Claims (9)
1. a kind of gravity dam construction diversion structure, it is characterised in that include
It is arranged on the bottom diversion outlet of gravity dam bottom（1）；
One phase transverse cofferdam（4）, it is arranged on the tributary of gravity dam upstream,
The second stage of transverse cofferdam（5）, it is arranged on the main river of gravity dam upstream,
Longitudinal cofferdam（3）, its upstream end is arranged on the intersecting at bank slope of main river and tributary, and
Diversion canal（6）；
The diversion canal（6）The main river and tributary Liang Tiao rivers of connection gravity dam upstream, makes diversion canal（6）In gravity dam
Bidirectional flow-through is realized during stage construction.
2. gravity dam construction diversion structure according to claim 1, it is characterised in that the diversion canal（6）Turnover
The tight-lipped neighbour one phase transverse cofferdam（4）With the second stage of transverse cofferdam（5）.
3. gravity dam construction diversion structure according to claim 1, it is characterised in that the diversion canal（6）Excavate into
The gradient of type is flat slope.
4. gravity dam construction diversion structure according to claim 3, it is characterised in that the diversion canal（6）Side slope
Slope ratio is 1：0.3-1：1.0.
5. gravity dam construction diversion structure according to claim 4, it is characterised in that the diversion canal（6）Side slope
Slope ratio is 1：0.4-1：0.6.
6. gravity dam construction diversion structure according to claim 1, it is characterised in that the diversion canal（6）It is cross-section
Face is trapezoidal cross-section, rectangular cross section or compound cross-section.
7. gravity dam construction diversion structure according to claim 1, it is characterised in that the phase transverse cofferdam（4）With
The second stage of transverse cofferdam（5）Weir crest be higher than more than ordinary water level 0.5m.
8. the gravity dam construction diversion structure according to one of claim 1-7, it is characterised in that the longitudinal cofferdam（3）
Downstream be directly connected with the wall of leading of gravity dam, or longitudinal cofferdam（3）Downstream by leading wall（2）It is connected with gravity dam.
9. the gravity dam construction diversion structure according to one of claim 1-7, it is characterised in that the longitudinal cofferdam（3）
Downstream be directly connected with gravity dam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621178625.8U CN206173879U (en) | 2016-11-03 | 2016-11-03 | Gravity dam construction diversion structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621178625.8U CN206173879U (en) | 2016-11-03 | 2016-11-03 | Gravity dam construction diversion structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206173879U true CN206173879U (en) | 2017-05-17 |
Family
ID=58681909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621178625.8U Expired - Fee Related CN206173879U (en) | 2016-11-03 | 2016-11-03 | Gravity dam construction diversion structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206173879U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629771A (en) * | 2019-09-02 | 2019-12-31 | 中国水利水电第五工程局有限公司 | Construction method of multi-branch river multi-river core island cofferdam |
| JP7245407B1 (en) * | 2023-01-11 | 2023-03-24 | 有限会社祐企建設 | Flow control plate and its installation method |
-
2016
- 2016-11-03 CN CN201621178625.8U patent/CN206173879U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629771A (en) * | 2019-09-02 | 2019-12-31 | 中国水利水电第五工程局有限公司 | Construction method of multi-branch river multi-river core island cofferdam |
| CN110629771B (en) * | 2019-09-02 | 2021-06-18 | 中国水利水电第五工程局有限公司 | Construction method of multi-branch river multi-river core island cofferdam |
| JP7245407B1 (en) * | 2023-01-11 | 2023-03-24 | 有限会社祐企建設 | Flow control plate and its installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170517 Termination date: 20211103 |