Measuring method of internal flow velocity and impact force spatial distribution of viscous debris flow
A technology of spatial distribution and measurement method, which is applied in the field of impact force spatial distribution measurement and the average velocity of viscous debris flow, which can solve the problems of inability to solve the spatial distribution of velocity and the inability to measure velocity.
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Embodiment 1
[0058] Such as Figure 1 ~ Figure 3 As shown, the method of the present invention is used to measure the spatial distribution of debris flow velocity.
[0059] A debris flow ditch is a medium-sized debris flow ditch with an altitude of 1820m to 3500m and a drainage area of 12.2km 2 . Viscous mudslides have erupted in the ditch many times, seriously threatening the lives and property of local people. In order to reduce debris flow disasters, it is planned to build a permeable sand control dam project in the debris flow flow area, and it is necessary to calculate and measure the spatial distribution of the average velocity of debris flow.
[0060] Step S1, preliminary preparation
[0061] figure 1 It is the top view of the calculated section position (the arrow shows the movement direction of the debris flow). Set any section Ⅰ-Ⅰ on the debris flow channel, and measure the average vertical gradient of the debris flow channel at the position of section Ⅰ-Ⅰ based on topogr...
Embodiment 2
[0085] On the basis of Example 1, the spatial distribution of impact force of viscous debris flow is further measured.
[0086] Step S5, determine the debris flow impact force F at any point S δ :
[0087] Substituting each parameter into Equation 5 to calculate the impact pressure F at any point S(x, y) of debris flow in section I-I δ ,Have:
[0088]
[0089] In this embodiment, the section I-I takes a rectangular section analysis, and λ takes a value of 1.33.
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