Tensile strength measuring instrument capable of controlling moisture content and compactness state of soil

Abstract

The invention discloses a tensile strength measuring instrument capable of controlling the moisture content and compactness state of soil. The left side part of a spindle-shaped organic glass mold isfixed on a rectangular organic glass base next to the spindle-shaped organic glass mold and is fixed on an organic glass bottom plate through four bolts distributed on the base. Two guide rails distributed on the two sides of the bottom plate in the long edge direction are arranged on the upper surface of the right side of the organic glass bottom plate, an organic glass base with two wheel shaftsand idler wheels is installed above the guide rails, the right side part of the spindle-shaped organic glass mold for containing soil is fixed above the organic glass base, the center of the right side of the organic glass base is connected with a traction rope and is connected with a stress sensor and a loading device through a fixed pulley on the right side edge of the organic glass bottom plate. The tensile strength measuring instrument can accurately capture the instantaneous damage state of the soil sample, compare the data of the stress sensor, accurately position the damage moment andthe damage state, and accurately determine the tensile strength of the soil in different moisture content or compactness states.

Description

technical field [0001] The invention relates to the technical field of soil tensile strength testing, in particular to a tensile strength testing instrument capable of controlling soil water content and compactness state. Background technique [0002] The tensile strength of the soil is an important index to measure the physical and mechanical properties of the soil, just like the strength indicators such as the compressive strength and shear strength. During the formation process of the soil, the integrity and integrity of the original rock were damaged to varying degrees. In terms of mechanical properties, it still has a certain compressive strength and shear strength, but the strength value has been greatly reduced, while the tensile strength Strength is largely or completely lost. In engineering practice, the compressive strength and shear strength of the soil and the damage resistance of the soil under load are mainly considered and utilized. Considering the value of t...

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Problems solved by technology

Most of the existing testing instruments based on these methods measure the state of soil with a certain plasticity, and have c

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