Observational method used for trench slope gravitational erosion field test

A technology of gravity erosion and field test, which is applied in the direction of soil material testing, material inspection, etc., can solve problems such as differences, and achieve the effect of low operating cost, good mobility, and light transportation

Inactive Publication Date: 2015-01-28
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ambient light and site conditions of the field test are quite different from those of the indoor test.

Method used

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  • Observational method used for trench slope gravitational erosion field test
  • Observational method used for trench slope gravitational erosion field test
  • Observational method used for trench slope gravitational erosion field test

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Embodiment 1

[0044] Taking the field test of the loess gully slope gravity erosion process as an example, the specific steps of the device implementation for establishing the gully slope gravity erosion process field test are explained. The experiment was carried out in the Liudaogou watershed of Shenmu County on the Loess Plateau.

[0045] Step 1: Preliminary finishing of the terrain

[0046] The generalized slope surface is designed according to the typical landform characteristics of the Huangtugou slope7. The plane projection dimensions of the model along the slope and perpendicular to the slope are 300cm and 400cm, respectively. The entire slope is composed of a gentle slope of 3° and a steep slope of 60° to 80°, and the height of the steep slope is 1.5m. The generalized slope surface was preliminarily sorted out on the gully slope site prone to gravity erosion.

[0047] Step 2: Build a mobile laboratory

[0048] Build and assemble field laboratory 4 on site. The test chamber is ...

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Abstract

The invention discloses an observational method used for a trench slope gravitational erosion field test. The observational method is characterized in that a DV sight line is perpendicular to structured light rays on an abrupt slope through a geography instrument, and according to video screenshots in the test process, the gravity erosion amount and the waterpower erosion amount, namely the total erosion amount, the gravity erosion amount and the waterpower erosion amount of individual rainfall, in an individual rainfall event, the gravity erosion amount occurring after rainfall is completed, and slope direction distribution and gradient distribution of the abrupt slope at any time can be respectively calculated. The observational method is further characterized in that the definition of laser rays projected on the abrupt slope is strengthened by adjusting indoor light rays, building a rainproof observation room and installing an anti-fog filter, the DV sight line is perpendicular to a laser plane emitted by a geography instrument main machine by adjusting the sight line angles of a DV, and testing and adjustment are carried out according to a sight line calibrator. According to the observational method, the water power erosion amount can be separated from the gravity erosion amount, and the gravity erosion amount in the rainfall process and the gravity erosion amount after rainfall can be quantitatively observed and calculated.

Description

technical field [0001] The invention belongs to the technical field of soil and water conservation research devices, and relates to a method for establishing an on-site test of a gully slope gravity erosion process, which is a set of test systems for simulating and observing rainfall in the field gully slope avalanche process, and the device can measure on-site The gravitational erosion amount of the previous avalanche events of the gully slope during the rainfall, the total gravitational erosion amount of each rainfall, the gravitational erosion amount after the rain, and the slope and aspect of the steep slope at any time. Background technique [0002] Quantitative observation of the gravity erosion process of gully slopes can deeply study its occurrence mechanism, and provide scientific basis for the establishment of gravity erosion prediction models and the determination of disaster prevention and mitigation strategies. However, due to the complexity of gravitational ero...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 徐向舟郭文召马亮严桥
Owner DALIAN UNIV OF TECH
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