CN207525718U - A kind of flood discharging tunnel gentle slope and abrupt slope connection structure - Google Patents
A kind of flood discharging tunnel gentle slope and abrupt slope connection structure Download PDFInfo
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- CN207525718U CN207525718U CN201721568180.9U CN201721568180U CN207525718U CN 207525718 U CN207525718 U CN 207525718U CN 201721568180 U CN201721568180 U CN 201721568180U CN 207525718 U CN207525718 U CN 207525718U
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- discharging tunnel
- flood discharging
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Abstract
The utility model is related to a kind of flood discharging tunnel gentle slope and abrupt slope connection structure, it includes positioned at the gentle slope of upstream section, the steep slope section positioned at downstream and the aeration structure that is connected between gentle slope section and steep slope section；Bottom plate, the bottom plate of steep slope section and the bottom plate of aeration structure of the gentle slope section are plane, wherein the bottom plate of the aeration structure is horizontally disposed.Connection structure described in the utility model enormously simplifies structure design difficulty, reduces design studies workload, while save engineering cost.
Description
Technical field
The utility model is related to hydraulic and hydroelectric engineering flood discharging tunnel Dam Configuration Design field, specifically, being related to a kind of flood discharging tunnel
Gentle slope and abrupt slope connection structure.
Background technology
It with the construction of Southwestern China area large water conservancy hydroelectric engineering, is limited by work arrangement condition, while to increase
The safety and flexibility of flood discharge, many engineerings are disposed with flood discharging tunnel in dam site region shore slope and participate in flood discharge, and flood discharging tunnel build is set
Meter becomes one of an important factor for influence flood discharge safety and engineering safety.
The design of flood discharging tunnel changeover portion and linkage section is the emphasis of flood discharging tunnel Dam Configuration Design.When flood discharging tunnel is limited by orographic condition
System, during using " Long Luowei " scheme, there are a transition to connect for top gentle slope section (including horizonal base plate situation) and lower part steep slope section
It connects section, in existing design, cavitation corrosion occurs for flow is avoided at this to be detached from bottom plate, it is desirable that the section is connected with parabola shaped bottom plate
It connects, commonly referred to as " the strange section in whirlpool " or " parabolic segment ".This connection mode is disadvantageous in that the design of parabolic equation is difficult
Spend larger, and the build generally requires customization dedicated templates in work progress at the scene, and difficulty of construction is big, construction precision requirement compared with
It is high.
In flood discharging tunnel Dam Configuration Design, usually it is also contemplated that the setting of aeration structure.By aeration structure in flood discharging tunnel
Flow carry out tonifying Qi, can effectively reduce high-velocity flow turbulent fluctuation and flow cavitation is caused to act on, mitigate to flood discharging tunnel wetted surfaces
Caused by cavitation erosion, reach flow-shape smooth-going, the sufficient effect of aeration.In general, aeration structure can be arranged as required to
The larger flood discharging tunnel steep slope section of flow velocity is normally at linkage section " the strange section in whirlpool " downstream.Due to " the strange section in whirlpool " and aeration in flood discharging tunnel
The structure of structure position is more complicated, and design difficulty is larger, needs to customize dedicated templates, difficulty of construction in specific implementation process
Greatly, construction precision is more demanding, so as to expend a large amount of manpower and financial resources input.
Based on the above situation, there is an urgent need for design a kind of novel flood discharging tunnel gentle slope that can be solved the above problems to connect knot with abrupt slope
Structure.
Utility model content
The purpose of the utility model is to overcome parabola connection mode construction between flood discharging tunnel gentle slope section and steep slope section is difficult
The deficiency that degree is big, flood discharging tunnel integrated engineering cost is high, provides a kind of novel flood discharging tunnel gentle slope and abrupt slope connection structure, on gentle slope
Aeration structure is set between section and steep slope section, eliminates flood discharging tunnel parabolic segment, is thrown so as to reduce engineering difficulty, save engineering
Money, while the setting of aeration structure alleviates the cavitation erosion of high-velocity flow, ensure that the safe operation of flood discharging tunnel.
To achieve the above object, flood discharging tunnel gentle slope described in the utility model and abrupt slope connection structure, it includes being located at upper
Trip gentle slope section, positioned at downstream steep slope section and be connected to gentle slope section and steep slope section between aeration structure；The gentle slope section
Bottom plate, the bottom plate of steep slope section and the bottom plate of aeration structure be plane, wherein the bottom plate of the aeration structure is horizontally disposed.
Further, the aeration structure includes vertically falling bank, is arranged on and vertically falls bank both ends and positioned at both walls bottom
Through-hole, the snorkel that is arranged in both walls and be arranged on both walls and correspond in top plate and in the air inlet of atmosphere；
The lower end of two snorkels connects respectively with corresponding through-hole, the upper ends of two snorkels respectively with corresponding air inlet
Mouth connection.
Further, the through-hole is right-angled trapezium tetragonous column configuration；Wherein, left and right two end faces be right-angled trapezium, bottom
Side and the vertical bottom plate for falling bank are wide and coplanar, and upstream side and downstream side are located at bottom side both ends and the bottom of perpendicular to
Side, the height of the upstream side are higher than the height of downstream side, and the top side inclined-plane is equipped with what is connected with snorkel lower end
Blow vent.
Further, the height of the height of the upstream side and downstream side ratio is 1.5:1-5:1.
Further, the snorkel is cylinder or regular prism configuration.
Further, flood discharging tunnel gentle slope section, flood discharging tunnel steep slope section and aeration structure by the way of one-piece casting into
Row is built.
The beneficial effects of the utility model are：
Flood discharging tunnel described in the utility model replaces parabola as gentle slope section and the connection of steep slope section by the use of aeration structure
Structure, structural shape is simple, while can play the erosion reduction of conventional aeration structure, enormously simplifies structure design difficulty,
Reduce design studies workload, while save engineering cost.The bottom plate of gentle slope section, steep slope section and aeration structure is
Plane, design difficulty is smaller, and customization Special curved surface template is not required to during site operation, can be met using generic stereotype template
Structural concrete pours needs, is not required to put into additional manpower and operating expenses, and standby storehouse is simpler, and bottom plate is planar junction
Drawing-die form of construction work can be used in structure, and required precision is opposite to be easier to meet.Whole pour may be used in flood discharging tunnel described in the utility model
The mode built is built, and the construction time is short, and operating expenses can be saved further.
The through-hole of flood discharging tunnel aeration structure described in the utility model takes right-angled trapezium tetragonous column configuration, can be to avoid flood discharge
Overflow, to ensure ventilatory capacity and ventilatory effect, effectively mitigates high-velocity flow to flood discharging tunnel concrete table to the barrier effect of through-hole
The cavitation erosion in face ensures that flood discharging tunnel overall operation is normal.
By verification, by the use of aeration structure described in the utility model as gentle slope section and the connection structure of steep slope section,
HYDRODYNAMIC CONDITION RELATING TO and parabolic transition section connection structure are substantially suitable, and flow smooth-going, fluidised form is preferable, and flow-passing surface does not generate negative pressure；
Meanwhile acted on by the aeration of aeration structure, the cavitation erosion of steep slope section high-velocity flow is effectively prevented, ensure that flood discharging tunnel is transported
Row safety.
Description of the drawings
Fig. 1 is flood discharging tunnel gentle slope described in the utility model and the profilograph of abrupt slope connection structure；
Fig. 2 is flood discharging tunnel gentle slope described in the utility model and the plan view of abrupt slope connection structure；
Fig. 3 is flood discharging tunnel gentle slope described in the utility model and the structure diagram of abrupt slope connection structure；
Fig. 4 is the structure diagram of through-hole described in the utility model.
In figure：
Gentle slope section 1；Steep slope section 2；Aeration structure 3；Vertically fall bank 3.1；Through-hole 3.2；Snorkel 3.3；Air inlet 3.4；End
Face 3.2.1；Bottom side 3.2.2；Upstream side 3.2.3；Downstream side 3.2.4；Top side inclined-plane 3.2.5；Blow vent 3.2.5.1；
Side wall 4；Top plate 5；
Specific embodiment
The performance of the utility model is described in detail below in conjunction with attached drawing, but they do not form the limit to the utility model
It is fixed, it is only for example.Simultaneously by being described in further detail with specific implementation to the utility model.
" one-piece casting " described in the utility model refers to 3 position of aeration structure and adjacent flood discharging tunnel gentle slope section 1 and flood discharge
Hole steep slope section 2 carries out concrete one-piece casting construction using universal plane template.
By taking some hydropower station engineering as an example, left bank sets three, and using aeration structure as gentle slope, section connect knot with steep slope section
The flood discharging tunnel of structure.
Flood discharging tunnel gentle slope as depicted in figs. 1 and 2 and abrupt slope connection structure, it is included positioned at the gentle slope of upstream section 1 and position
Steep slope section 2 in downstream is equipped with aeration structure 3 between gentle slope section 1 and steep slope section 2.The bottom plate of the gentle slope section 1, steep slope section 2
It is that inclined plane and front end are higher than rear end.The bottom plate of the aeration structure 3 is horizontally disposed.
As Figure 1-Figure 4, the aerator of the aeration structure 3 takes the vertical form for falling bank 3.1, described vertically to fall bank
3.1 both ends are equipped with through-hole 3.2, and two through-holes 3.2 are located at the bottom of both walls 4 respectively.The through-hole 3.2 is right angle ladder
Shape tetragonous column configuration；Wherein, left and right two end face 3.2.1 are right-angled trapezium, bottom side 3.2.2 and the vertical bottom plate for falling bank 3.1
Wide and coplanar, upstream side 3.2.3 and downstream side 3.2.4 are located at bottom side 3.2.2 both ends and perpendicular to bottom side
3.2.2, the height of the upstream side 3.2.3 is higher than the height of downstream side 3.2.4, in three flood discharging tunnels of the present embodiment
In, the height of the upstream side 3.2.3 is 1.5 with the height ratio of downstream side 3.2.4:1.Both sides respectively with upstream side
3.2.3 the top side inclined-plane 3.2.5 connected with downstream side 3.2.4 is equipped with blow vent
3.2.5.1, the blow vent 3.2.5.1 is connected with snorkel 3.2.3 lower ends.
The aeration structure 3, which further includes the snorkel 3.3 being arranged in both walls 4 and is arranged on both walls 4, corresponds to top
Air inlet 3.4 in plate 5.Two snorkels 3.3 using cylindrical configuration, lower end connects respectively with corresponding through-hole 3.2,
Upper end connects respectively with corresponding air inlet 3.4, the air inlet 3.4 and atmosphere.
Construction side's hair of the present embodiment flood discharging tunnel is as follows：
1. using conventional construction method (telescoping steel form construction, typified form construction etc.) to flood discharging tunnel gentle slope section 1 and flood discharge
Hole steep slope section 2 is constructed；
2. use universal plane template at 3 position of aeration structure and adjacent flood discharging tunnel gentle slope section 1 and flood discharging tunnel steep slope section 2
Carry out concrete one-piece casting construction (drawing-die form of construction work also can be used in bottom plate)；
3. it plasters flood-discharging hole structure surface, to meet structure precision requirement.
It is significantly simple due to the connection mode using aeration structure 3 instead of conventional parabolic transition section in the present embodiment
Structure design difficulty and difficulty of construction are changed, have simplified construction technology, and improved flood discharging tunnel normal operation safety, do not considered
The indirect economic effect that duration shifts to an earlier date saves about 10.2 ten thousand yuan of engineering direct investment, refers to table 1.
1 construction project cost saving of table compares abridged table
In the present embodiment, aeration structure of the present invention is as gentle slope section and the connection structure of steep slope section, hydraulics
Condition and parabolic transition section connection structure are substantially suitable, and flow smooth-going, fluidised form is preferable, and flow-passing surface does not generate negative pressure；It is meanwhile logical
The aeration effect of aeration structure is crossed, the cavitation erosion of steep slope section high-velocity flow is effectively prevented, ensure that flood discharging tunnel operational safety.
Model test results refer to table 2.
2 model test results of table compare abridged table
Claims (6)
1. a kind of flood discharging tunnel gentle slope and abrupt slope connection structure, it is characterised in that：Under being located at the gentle slope section (1) of upstream, being located at
The steep slope section (2) of trip and the aeration structure (3) being connected between gentle slope section (1) and steep slope section (2)；The gentle slope section (1)
The bottom plate of bottom plate, the bottom plate of steep slope section (2) and aeration structure (3) is plane, and the bottom plate of wherein aeration structure (3) is set for level
It puts.
2. flood discharging tunnel gentle slope according to claim 1 and abrupt slope connection structure, it is characterised in that：The aeration structure (3)
Including vertically falling bank (3.1), being arranged on the vertical through-hole (3.2) for falling bank (3.1) both ends and being located at both walls (4) bottom, setting
It snorkel (3.3) in both walls (4) and is arranged in the corresponding top plate (5) of both walls (4) and in the air inlet of atmosphere
Mouth (3.4)；The lower end of two snorkels (3.3) connects respectively with corresponding through-hole (3.2), two snorkels
(3.3) upper end connects respectively with corresponding air inlet (3.4).
3. flood discharging tunnel gentle slope according to claim 2 and abrupt slope connection structure, it is characterised in that：The through-hole (3.2) is
Right-angled trapezium tetragonous column configuration；Wherein, left and right two end faces (3.2.1) are right-angled trapezium, and bottom side (3.2.2) falls with vertical
The bottom plate of bank (3.1) is wide and coplanar, and upstream side (3.2.3) and downstream side (3.2.4) are positioned at bottom side (3.2.2) two
It holds and perpendicular to bottom side (3.2.2), the height of the upstream side (3.2.3) is higher than the height of downstream side (3.2.4),
Top side inclined-plane (3.2.5) is equipped with the blow vent (3.2.5.1) connected with snorkel (3.3) lower end.
4. flood discharging tunnel gentle slope according to claim 3 and abrupt slope connection structure, it is characterised in that：The upstream side
The height of (3.2.3) is 1.5 with the height ratio of downstream side (3.2.4):1-5:1.
5. flood discharging tunnel gentle slope according to claim 2 and abrupt slope connection structure, it is characterised in that：The snorkel (3.3)
For cylinder or regular prism configuration.
6. flood discharging tunnel gentle slope according to any one of claims 1-5 and abrupt slope connection structure, it is characterised in that：It is described slow
Slope section (1), steep slope section (2) and aeration structure (3) are built by the way of one-piece casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721568180.9U CN207525718U (en) | 2017-11-20 | 2017-11-20 | A kind of flood discharging tunnel gentle slope and abrupt slope connection structure |
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|---|---|---|---|
| CN201721568180.9U CN207525718U (en) | 2017-11-20 | 2017-11-20 | A kind of flood discharging tunnel gentle slope and abrupt slope connection structure |
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| CN207525718U true CN207525718U (en) | 2018-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724348A (en) * | 2017-11-20 | 2018-02-23 | 长江勘测规划设计研究有限责任公司 | A kind of flood discharging tunnel gentle slope and abrupt slope attachment structure |
-
2017
- 2017-11-20 CN CN201721568180.9U patent/CN207525718U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724348A (en) * | 2017-11-20 | 2018-02-23 | 长江勘测规划设计研究有限责任公司 | A kind of flood discharging tunnel gentle slope and abrupt slope attachment structure |
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