An in-situ pull-out test device for shrub rhizomes on expansive soil slopes

Abstract

An in-situ pull-out test device for shrub rhizomes on expansive soil slopes, comprising a fixed base frame, a support frame, a drawing part and a fixture; The central vertical pole fixedly connected to the first beam has a pulley groove on the top; the drawing part includes a stress-displacement measurement module, a pulley structure, a pulley and a servo motor, and one end of the pullstring is connected to the servo motor; the stress-displacement measurement The module includes a measuring slider and a stress sensor. The other end of the pull rope is connected to the upper end of the stress-displacement measuring module. A chute is provided on the side of the center pole close to the measuring slider, and a displacement scale line is arranged beside the chute; stress-displacement measurement The lower end of the module is connected with the clamp. The invention provides an in-situ pulling test device for shrub rhizomes on expansive soil slopes, which has simple structure, convenient and fast operation, low manufacturing cost, and can quickly and accurately measure the pulling force and the pulling displacement of shrub rhizomes.

Description

technical field [0001] The invention belongs to the technical field of measuring devices, and in particular relates to an in-situ pulling test device for shrub roots on expansive soil slopes. Background technique [0002] Expansive soil is a special cohesive soil containing more hydrophilic mineral components such as montmorillonite and kaolinite. Due to the existence of these components, expansive soil shows special engineering properties. Under the alternating wet and dry environment, the engineering properties show that the volume of the soil will expand and shrink significantly, and the strength will decrease sharply, which will seriously damage the light structures on the shallow surface such as roads and railways. Ecological protection is an important method to control expansive soil disasters. Shrubs are the main vegetation for ecological protection of expansive soil slopes. The root system of shrubs is strong, which can fix the surface soil and prevent it from slidin...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of in-situ pull-out test device of shrub rhizome on expansive soil slope, to solve the problem that the existing in-situ pull-out test proposed in the background technology still uses devices such as tape measure and spring dynamometer, which is difficult to measure To obtain real pullout force and displacement data, the measurement efficiency and accuracy are relatively low, which is not enough to meet the urgent needs of in-situ testing of expansive soil slopes

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