Undisturbed soil sampler and soil infiltration performance measuring method

Abstract

The invention relates to the technical field of soil infiltration performance measurement, in particular to an undisturbed soil sampler and a soil infiltration performance measurement method. The undisturbed soil sampler comprises a soil sampling pipe protection sleeve, a pressure bearing cover and a soil sampling pipe; a cutting edge is arranged at the first end of the soil sampling pipe protection sleeve, and a first soil sampling pipe positioning ring surface is arranged in the soil sampling pipe protection sleeve; the pressure-bearing cover is detachably connected with the second end of the soil sampling pipe protection sleeve, and a second soil sampling pipe positioning ring surface is arranged in the pressure-bearing cover; the soil sampling pipe is used for being placed in the soilsampling pipe protective sleeve; the soil sampling pipe is made of a transparent material; a water inlet is formed in the side face of the soil sampling pipe, used for being connected with a water inlet pipe of a water supply device and provided with a sealing part. The undisturbed soil sampler can accurately collect field undisturbed soil, and the collected undisturbed soil can be directly used for undisturbed soil infiltration characteristic measurement, wetting front observation, preferential infiltration measurement and preferential flow channel observation research.

Description

technical field [0001] The invention relates to the technical field of soil infiltration performance measurement, in particular to an undisturbed soil fetcher and a soil infiltration performance measurement method. Background technique [0002] At present, the methods for collecting undisturbed soil mainly include the ring knife method and the undisturbed soil-taking tube method. The ring-knife method has disadvantages such as complicated operation and high labor intensity in the soil extraction process; compared with the ring-knife method, the original soil extraction tube method can take soil samples from multiple soil layers at a time, and the soil extraction efficiency is higher, but the soil samples are pushed out. Difficult and low accuracy of soil sample separation. Using the above two methods to collect undisturbed soil can accurately measure soil bulk density and soil moisture content, but it cannot be used to measure the change process of soil infiltration perform...

AI Technical Summary

Problems solved by technology

Usually the soil infiltration performance test is mainly carried out indoors and in the field. In the indoor test, the sieved soil is used to remove debris such as stones and weeds. The uniformity of the soil is good, but due to the change of the original state of the soil, the measurement results cannot be measured. It truly reflects the soil infiltration performance of undisturbed soil; field tests mainly use soil infiltration performance measurement devices, such as disc infiltrators, double-ring infiltrators, and artificial simulated rainfall. Difficult to measure deep soil infiltration properties

The artificially simulated rainfall process is easily affected by natural wind speed, temperature changes, etc., and there are certain errors in the measurement results, and it is impossible to obtain high initial infiltration performance

Images