Dam body damage explosive quantity estimation method based on underwater explosion test measurement results

Abstract

The invention discloses a dam body damage explosive quantity estimation method based on underwater explosion test measurement results. The dam body damage explosive quantity estimation method includesthe steps: acquiring the critical value of explosion impact load peak pressure applied to a dam body under critical damage conditions according to dam parameter simulation; building an underwater explosion test device based on a detonator and explosives, performing series explosion tests under the condition of determined explosive load, charging submerged depth and inflation pressure in a container, measuring the impact wave peak value of underwater explosion and acquiring the relationship between the explosive load and the underwater impact peak pressure by fitting; finally, estimating dam body damage explosive quantity. The dam body damage explosive quantity estimation method has the advantages of simplicity, convenience and low cost.

Description

technical field [0001] The invention belongs to the technical field of explosions, and relates to a device for underwater explosion tests and a method for estimating the dosage of explosives for dam explosions. Background technique [0002] Once large-scale dams are damaged by explosions during wartime, multiple water conservancy projects will collapse, which will cause huge personal injuries and economic losses. Therefore, the research on anti-blast safety of dam engineering has very important theoretical guiding significance for minimizing losses and evaluating dam safety. Due to limited funds and sites, it is difficult to obtain the damage mechanism of large-scale dams under the action of blast loads through prototype blast tests; it is also difficult to truly reveal the mechanical behavior and failure process of blast prototypes by traditional structural model tests. The geotechnical centrifuge increases the gravity of the model through high-speed rotation, so that the ...

AI Technical Summary

Problems solved by technology

Due to limited funds and sites, it is difficult to obtain the damage mechanism of large-scale dams under the action of blast loads through prototype blast tests; it is also difficult to truly reveal the mechanical behavior and failure process of blast prototypes by traditional structural model tests

The geotechnical centrifuge increases the gravity of the model through high-speed rotation, so that the model medium body produces a self-weight stress similar to that of the prototype. The deformation and failure mechanism of the model are similar to the prototype, so that complex geotechnical engineering and dynamic problems can be simulated. One of the commonly used methods in mechanics, but its expensive cost and test costs have limited its large-scale promotion and use.

[0003] In addition, in the underwater explosion test, the explosive device is in an underwater overweight environment, and the external conditions of the overweight environment and high hydrostatic pressure will affect the explosive performance of the detonator and other explosive devices, and even the explosion rejection phenomenon occurs. It is urgent to develop a safe and reliable , scaled-down explosive device, to realize accurate simulation of underwater blasting under high hydrostatic pressure environment

Images