Artificial structure body used for scouring prevention of mud-rock flow and weir dam and application thereof
A structure and debris flow technology, applied in water conservancy projects, marine engineering, climate change adaptation, etc., can solve the problems of increasing downstream regional risks and social and economic losses, and achieve the effect of reducing the risk of dam failure, protecting safety, and saving costs.
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Embodiment 1
[0025] Such as figure 1 , figure 2 shown. The dam body of a dammed lake is mainly composed of gravel soil with an average particle size d 50 20cm, d 90 is 100cm, and the control flow velocity of the flood discharge of the barrier lake is 5.0m / s. In order to prevent the risk of rapid dam failure caused by flood discharge, it is planned to throw artificial structures towards the overflow section. The artificial structure includes four cylinders 1 of the same length, one end of the four cylinders 1 is concentrated and fixed at one point, and the other ends form four vertices of a regular tetrahedron in space. Column 1 is a cylindrical reinforced concrete structure, and the bulk density of the artificial structure is 27kN / m 3 . according to the formula The empirical coefficient k is taken as 5.0m 0.5 / s, starting velocity of artificial structure u c is 5.0m / s, calculated to get 0.5m; according to the formula , the stability coefficient K is 0.70, and the calculation is...
Embodiment 2
[0028] Such as image 3 , Figure 4 shown. A certain debris fluid is mainly composed of gravel soil, and its average particle size d 50 15cm, d 90 is 90cm, and the control velocity of the debris flow is 7.0m / s. In order to prevent the debris flow valley from being quickly cut down by the debris flow, it is planned to throw artificial structures into the debris flow channel. The artificial structure includes four cylinders 1 of the same length, one end of the four cylinders 1 is concentrated and fixed at one point, and the other ends form four vertices of a regular tetrahedron in space. Column 1 is a hexagonal reinforced concrete structure, and the bulk density of the artificial structure is 27kN / m 3 . according to the formula The empirical coefficient k is taken as 7.0m 0.5 / s, starting velocity of artificial structure u c is 7.0m / s, calculated to be 0.5m; according to the formula The stability factor K is 0.72, and the calculation is 1.42m; therefore, the minimum l...
Embodiment 3
[0030] Such as figure 1 , figure 2 shown. The dam body of a dammed lake is mainly composed of gravel soil with an average particle size d 50 30cm, d 90 is 120cm, and the control velocity of the flood discharge of the barrier lake is 5.0m / s. In order to prevent the risk of rapid dam failure caused by flood discharge, it is planned to throw artificial structures towards the overflow section. The artificial structure includes four cylinders 1 of the same length, one end of the four cylinders 1 is concentrated and fixed at one point, and the other ends form four vertices of a regular tetrahedron in space. Column 1 is a cylindrical reinforced concrete structure, and the bulk density of the artificial structure is 27kN / m 3 . according to the formula The empirical coefficient k is taken as 5.0m 0.5 / s, starting velocity of artificial structure uc is 5.0m / s, calculated to get 0.5m; according to the formula The stability coefficient K is 0.68, and the calculated value is 0.8...
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