Measuring method of debris flow impact force
A measurement method and technology of impact force, which is applied in the field of impact force measurement and debris flow impact test measurement, and can solve the problems of complex stress-strain constitutive relationship and the influence of sensor deformation data measurement, etc.
Inactive Publication Date: 2018-06-12
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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Problems solved by technology
However, reinforced concrete is a typical brittle material. The stress-strain constitutive relationship under impact is complex and has obvious nonlinear characteristics, which will affect the deformation data measurement of the sensor.
Method used
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Embodiment 1
[0060] Such as Figure 1 to Figure 7 As shown, the debris flow impact force is measured by the method of the present invention.
[0061] Step S1, design and determine the basic parameters of the measuring arm (1) of the debris flow monitoring device
[0062] figure 1 It is a structural schematic diagram of a contact fiber grating debris flow monitoring device. The contact fiber grating debris flow monitoring device comprises a reinforced concrete columnar monitoring pile, the reinforced concrete columnar monitoring pile is fixed on the ground through its lower area, and the upper area of the reinforced concrete columnar monitoring pile exposes the bed surface. The upper part of the reinforced concrete columnar monitoring pile has a measuring arm (1) parallel to the ground, and an optical fiber grating sensor (3) is installed on the measuring arm (1). The fiber grating sensors are respectively connected with the upper center (2) through signal transmission lines. The fib...
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Abstract
The invention discloses a measuring method for mud-rock flow's impact force which adopts a concrete reinforcement structure contact fiber grating mud-rock flow monitoring device. In this method, first, the maximal arm (Lmax) of impact force is determined. Second, by experiments, a fitting equation F= f(Epsilon) is established between the impact force and the strain of aprimary strain fiber grating sensor under the maximal arm(Lmax) of impact force . The strain characteristics of the strain fiber grating sensor under an arbitrary impact force (FX)are determined again to further determine the arm (Lim) of impact force. Through lever arm equivalent transformation, the arbitrary impact force (FX) and the strain value Epsiloneq of the primary strain fiber grating sensor under the maximal arm (Lmax) of impact force can be obtained. Finally, the value of impact force FX can be solved through the fitting equation. According to the invention, the principle of the method is reliable; the computing process is scientific and convenient; the impact force of a highly disruptive mud-rock flow can be measured; and the magnitude of damage energy of the mud-rock flow to channels and houses can be reflected directly. The method is practicably suitable for field use and can be widely applied.
Description
technical field [0001] The invention relates to a method for measuring impact force, in particular to a test and measurement method for debris flow impact force, which belongs to the technical field of debris flow monitoring and measurement. Background technique [0002] Debris flow impact force measurement is the key basic work to study and evaluate the damage caused by debris flow. The design of debris flow impact measurement equipment and measurement methods, especially the design of monitoring and measurement equipment and measurement methods that meet the financial and material conditions of the debris flow area and the topographic and environmental conditions of the debris flow channel, is a necessary condition for effective monitoring and measurement of debris flow. The difficulty of measuring the impact force of debris flow lies in: debris flow is a multiphase body mixed with water, clay, gravel and air, with high viscosity and high bulk density, which limits the app...
Claims
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IPC IPC(8): G01L5/00
CPCG01L5/0052
Inventor 张少杰胡凯衡王凯
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI