Soil sampling equipment for drilling standard volume of undisturbed soil

Abstract

The invention discloses soil sampling equipment for drilling standard volume of undisturbed soil. The equipment includes a drill, a cutting ring, a positioning seat and a scale bar. The cutting ring is removably attached to the bottom of the positioning seat; the drill is removably connected at the bottom of the cutting ring; the positioning seat is connected to the bottom of the scale bar; the scale bar, positioning seat, cutting ring and drill are each provided with a cavity, and the cavities are communicating with each other; a bulldozing bar is within the scale bar; the bottom of the bulldozing bar is connected to a bulldozing bolt; the bulldozing bar can move up and down within the cavity; the bulldozing bar and scale bar can be by connected a fixing device; side a plurality of lower soil cut ports are arranged on the side of the drill; the height of the lower soil cut ports is less than or equal to the height of the lower edge of the cutting ring; the side of the positioning seat is provided with a plurality of upper soil cut ports; and the height of the upper soil cut ports is equal to or greater than the height of the upper edge of the cutting ring. The equipment can accurately position the depth from the center of the cutting ring to the ground; for soil sampling, a drilling mode is used to avoid shock damage to the undisturbed soil; the drilling hole has minimal impact on the field crops and the vegetation and soil structure, and is convenient for quick backfilling.

Description

technical field [0001] The invention belongs to the technical field of soil moisture monitoring devices, and relates to equipment for fetching undisturbed soil. Background technique [0002] Soil moisture monitoring is an important basic work for drought resistance. The National Flood Control and Drought Relief Headquarters has paid more and more attention to moisture monitoring, and its investment has increased year by year. Most of the automatic moisture monitoring instruments and equipment are based on direct reading of volumetric water content. Therefore, the dry bulk density of soil at the moisture station must be measured in order to compare and analyze the weight moisture content data obtained by manual soil extraction and drying. The measurement of soil dry bulk density at the moisture station requires undisturbed soil, and the measurement of other parameters such as soil saturated water content and field water holding capacity also requires undisturbed soil. [000...

AI Technical Summary

Problems solved by technology

[0003] At present, the main way to collect the undisturbed soil of the soil moisture station is to excavate the profile, and use the ring knife to dig into the soil and then dig out the undisturbed soil. However, this method has the following three problems: 1. The ring knife itself has no scale mark, and the excavation section It is difficult to determine the exact depth from the center of the ring knife to the ground in the soil profile; 2. It is difficult to ensure vertical downward pressure during the knocking of the ring knife, and the vibration generated by the knocking will destroy the original soil structure in the ring knife and affect the accuracy of the measurement data; 3. , The excavation profile will cause great damage to the field vegetation, crops and soil structure

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