Apparatus suitable for instantaneous dam break test and its operation method

Abstract

The invention discloses a device suitable for an instant dam break test and an operation method of the device and relates to the field of hydraulics model testing. The device includes a test water groove, a water gate, a transmission system and a triggering system. Before a dam break test starts, a gate simulating a dam body in a door groove is in a static state. When the dam break test starts, aheavy bob falls so as to pull a thin cord, so that a pin is unplugged. A cam is pulled away instantly by a spring. The gate loses support of a support rod and acquires pulling force of a transmissionsystem at the same time, and falls rapidly in an extremely short time. By adopting the device provided by the invention, formation of under-gate hydraulic jump and disturbance of upstream water body due to upward lifting of a gate in a traditional dam break test are avoided, and more accurate study of water flow motion characteristics in a dam body instant break condition is facilitated.

Description

technical field [0001] The invention relates to the field of hydraulic model tests, in particular to a device suitable for instantaneous dam break tests and an operating method thereof. Background technique [0002] According to the "First National Water Conservancy Census Bulletin" issued by my country in 2013, there are a total of 98,002 reservoirs of various types in my country, of which the storage capacity exceeds 100 million m 3 There are more than 400 large reservoirs in China. Within the scope of our country's reservoir protection, there are hundreds of large and medium-sized cities, more than 300 million people and 480 million mu of farmland. With the passage of time and the lack of routine maintenance, the dam body of the reservoir will inevitably experience aging and damage, forming dangerous reservoirs and disease reservoirs. Extreme events such as earthquakes and heavy rains are likely to induce dam failures and cause huge safety hazards. Hidden danger. Dam s...

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Problems solved by technology

[0003] The physical model test of indoor flume dam break is the main research method to study the process of instantaneous dam break. During the test simulation process, the method of suddenly lifting the gate is usually used to obtain the instantaneous dam break water flow. Since the height of the gate exceeds the lower edge of the gate during the gate lifting process. The water body has a restrictive effect, causing the upstream water flow to break from the bottom, which is inconsistent with the actual instantaneous dam break flow process. At the same time, the shear force generated during the gate lifting process will cause jet and water splashing, which will significantly disturb the upstream water body

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