Water gate dipper type shunting energy dissipating rushingproof technology
Water gate dipper type shunting energy dissipating rushingproof technology
 CN 101,408,022 B
 Filed: 11/05/2008
 Issued: 09/05/2012
 Est. Priority Date: 11/05/2008
 Status: Active Grant
First Claim
1. water gate dipper type shunting energy dissipating rushingproof method, it is characterized in that:
 the concrete design and calculation method of water gate dipper type shunting energy dissipating rushingproof method divides two parts, and the one, the design of bailing bucket formula baffle pier build;
The 2nd, the design of absorption basin waterpower;
The confirming to depend primarily on of bailing bucket formula baffle pier width chosen the split ratio of stream and disspation through hydraudic jimp, generally is advisable with 50%, also should spread according to current in addition;
Aeration and underflow and choose stream interactional fluidised form confirm, as if single Kuan Zha hole clear span be B _{0}Then The leading edge width B of bailing bucket formula baffle pier _{1}For;
B _{1}＝
B _{0}/11 (1) The terminal top width B of bailing bucket formula baffle pier _{2}For;
B _{2}＝
B _{0}/6 (2) The terminal bottom width B of bailing bucket formula baffle pier _{3}For;
B _{3}＝
B _{0}/5 (3) The terminal top spacing B of bailing bucket formula baffle pier _{4}For;
B _{4}＝
B _{0}/8 (4) The height P of bailing bucket formula baffle pier, upstream face antiarc radius R chooses confirming of angle θ
, and the maximum waterdrop point that should mainly consider to choose stream should be controlled at behind the pier absorption basin slope section and horizontal segment intersection and be advisable by the downstream, and when just establishing, the high P of pier gets H _{0}/ 4, H _{0}Be the above total head of absorption basin base plate, θ
gets about 70 °
, and upstream face antiarc radius R is by computes;
R＝
P/(1cosθ
) (5)The quantity of baffle pier is unsuitable too much or very few, and a hole is general arranges 3, and the absorption basin Hydraulic Design Method that adapts with bailing bucket formula baffle pier is following;
To section before the lock, neckeddown section and stability region, downstream section are listed energy equation, then have respectively;
H _{0}＝
h _{c}+q _{d}^{2}/(2gφ
^{2}h _{c}^{2}) (6) H wherein _{0}Be the above total head of absorption basin base plate, h _{c}For participating in the neckeddown section depth of water of disspation through hydraudic jimp, q _{d}Be to participate in the discharge per unit width of disspation through hydraudic jimp, g is an acceleration of gravity, and factors such as head, gate and base plate form, roughness are relevant on efflux coefficient φ and
height of dam, the dam, and flat upper flat plate gate, or Plane Gate on Broadcrested Weir get 0.85～
1.00 during free discharge;
H _{0}＝
H+V _{0}^{2}/(2g) (7) H _{0}Be the above head of gate floor, V _{0}Be approach velocity before the lock, g is an acceleration of gravity;
Chinese PRB Reexamination
Abstract
The invention discloses a novel sluice bucket type flowdividing and energydissipation scour prevention technology. The technology comprises five parts, i.e., the overall design thought, the type selection of a section simulating hydraulic model, the verification of an integral simulating hydraulic model, the observation of an original model, and the comparison of economic technology, and the like. The design of the invention has eight most important key parts, i.e., the frontal edge width B1 of a pier, the top width B2 of a tail end, the bottom width B3 of the tail end, the inverted arc radius R of the upstream face of the pier, the flip shot angle Theta, the pier height P, the number of the pier, and the top space B4 between the tail ends of the piers, and the like. The design method of the sluice bucket type flowdividing and energydissipation scour prevention technology is divided into two major parts, i.e., the body form design and the distribution of the piers. The bucket type flowdividing pier designed in the way is characterized by low downstream water level, high energy consumption rate in ordinary flow flood discharging working condition, small stilling pool depth, short pool length, less workamount, low investment, and the like.
4 Claims

1. water gate dipper type shunting energy dissipating rushingproof method, it is characterized in that:
 the concrete design and calculation method of water gate dipper type shunting energy dissipating rushingproof method divides two parts, and the one, the design of bailing bucket formula baffle pier build;
The 2nd, the design of absorption basin waterpower;
The confirming to depend primarily on of bailing bucket formula baffle pier width chosen the split ratio of stream and disspation through hydraudic jimp, generally is advisable with 50%, also should spread according to current in addition;
Aeration and underflow and choose stream interactional fluidised form confirm, as if single Kuan Zha hole clear span be B _{0}ThenThe leading edge width B of bailing bucket formula baffle pier _{1}For;
B _{1}＝
B _{0}/11 (1)The terminal top width B of bailing bucket formula baffle pier _{2}For;
B _{2}＝
B _{0}/6 (2)The terminal bottom width B of bailing bucket formula baffle pier _{3}For;
B _{3}＝
B _{0}/5 (3)The terminal top spacing B of bailing bucket formula baffle pier _{4}For;
B _{4}＝
B _{0}/8 (4)The height P of bailing bucket formula baffle pier, upstream face antiarc radius R chooses confirming of angle θ
, and the maximum waterdrop point that should mainly consider to choose stream should be controlled at behind the pier absorption basin slope section and horizontal segment intersection and be advisable by the downstream, and when just establishing, the high P of pier gets H _{0}/ 4, H _{0}Be the above total head of absorption basin base plate, θ
gets about 70 °
, and upstream face antiarc radius R is by computes;
R＝
P/(1cosθ
) (5)The quantity of baffle pier is unsuitable too much or very few, and a hole is general arranges 3, and the absorption basin Hydraulic Design Method that adapts with bailing bucket formula baffle pier is following; To section before the lock, neckeddown section and stability region, downstream section are listed energy equation, then have respectively; H _{0}＝
h _{c}+q _{d}^{2}/(2gφ
^{2}h _{c}^{2}) (6)H wherein _{0}Be the above total head of absorption basin base plate, h _{c}For participating in the neckeddown section depth of water of disspation through hydraudic jimp, q _{d}Be to participate in the discharge per unit width of disspation through hydraudic jimp, g is an acceleration of gravity, and factors such as head, gate and base plate form, roughness are relevant on efflux coefficient φ and
height of dam, the dam, and flat upper flat plate gate, or Plane Gate on Broadcrested Weir get 0.85～
1.00 during free discharge;
H _{0}＝
H+V _{0}^{2}/(2g) (7)H _{0}Be the above head of gate floor, V _{0}Be approach velocity before the lock, g is an acceleration of gravity;
 the concrete design and calculation method of water gate dipper type shunting energy dissipating rushingproof method divides two parts, and the one, the design of bailing bucket formula baffle pier build;

2. water gate dipper type shunting energy dissipating rushingproof technology according to claim 1 is characterized in that:
 C _{1}The relation of the suitable depth of water in expression downstream and second conjugate depth is got during preliminary design between 0.83～
0.89, and rill is measured big value, and big flow gets the small value.
 C _{1}The relation of the suitable depth of water in expression downstream and second conjugate depth is got during preliminary design between 0.83～

3. water gate dipper type shunting energy dissipating rushingproof technology according to claim 1 is characterized in that:
 C _{2}Represent the coefficient relevant with hydraulic jump length, because the employing of bailing bucket formula baffle pier makes the formation and development of hydraulic jump that deep variation take place, the neckeddown section depth of water increases, and second conjugate depth reduces, C _{2}Generally get 6.2～
6.5.
 C _{2}Represent the coefficient relevant with hydraulic jump length, because the employing of bailing bucket formula baffle pier makes the formation and development of hydraulic jump that deep variation take place, the neckeddown section depth of water increases, and second conjugate depth reduces, C _{2}Generally get 6.2～

4. water gate dipper type shunting energy dissipating rushingproof technology according to claim 1 is characterized in that:
 C _{3}Be one with suitable depth condition in downstream and the required long relevant coefficient in absorption basin pond;
Get 1 when just establishing;
Dipper type shunting energy dissipating rushingproof technology reduces downstream water depth 25～
28% under the flow of middle low discharge or regular operation, shorten pond long 8～
26%;
Under big flow, reduce downstream water depth 23%, shorten pond long 9%.
 C _{3}Be one with suitable depth condition in downstream and the required long relevant coefficient in absorption basin pond;
Specification(s)