Water gate dipper type shunting energy dissipating rushing-proof technology

Water gate dipper type shunting energy dissipating rushing-proof 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
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1. water gate dipper type shunting energy dissipating rushing-proof method, it is characterized in that:

  • the concrete design and calculation method of water gate dipper type shunting energy dissipating rushing-proof 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 0Then The leading edge width B of bailing bucket formula baffle pier 1For;

    B 1

    B 0/11 (1) The terminal top width B of bailing bucket formula baffle pier 2For;

    B 2

    B 0/6 (2) The terminal bottom width B of bailing bucket formula baffle pier 3For;

    B 3

    B 0/5 (3) The terminal top spacing B of bailing bucket formula baffle pier 4For;

    B 4

    B 0/8 (4) The height P of bailing bucket formula baffle pier, upstream face anti-arc radius R chooses confirming of angle θ

    , and the maximum water-drop 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 0Be the above total head of absorption basin base plate, θ

    gets about 70 °

    , and upstream face anti-arc radius R is by computes;

    R=

    P/(1-cosθ

    ) (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, necked-down section and stability region, downstream section are listed energy equation, then have respectively;

    H 0

    h c+q d2/(2gφ

    2h c2) (6) H wherein 0Be the above total head of absorption basin base plate, h cFor participating in the necked-down section depth of water of disspation through hydraudic jimp, q dBe 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 Broad-crested Weir get 0.85~

    1.00 during free discharge;

    H 0

    H+V 02/(2g) (7) H 0Be the above head of gate floor, V 0Be approach velocity before the lock, g is an acceleration of gravity;

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