Primary state soil sampler for loose sandy soil

Abstract

The invention discloses a primary state soil sampler for loose sandy soil, comprising inner and outer sleeves, wherein, the front end of the outer sleeve is a cone cutting edge, the inside of the cutting edge is provided with a guiding inner cone, the front end of the inner sleeve is provided with a plurality of elastic cap liners matched with the guiding inner cone, the central section of the inner sleeve is provided with sockets of soil separators, the front end of the inner sleeve is provided with a socket of a soil sealing plate, and the rear portion is provided with a jack of a synchronous positioning pin. The usage comprises the following steps that: before collecting soil, the inner sleeve is inserted into the outer sleeve and inserted into the synchronous positioning pin, the outer sleeve is pressed in soil by force application, then the inner sleeve is pressed to push the elastic cap liners to come together with the guiding inner cone for close up; the outer sleeve is lifted,the soil sealing plate is inserted into the socket, and then the inner sleeve is pulled out; the soil separators are respectively inserted into the sockets, and then the soil sealing plate and the soil separators are successively pulled out, the soil flowed out with each plate are collected and weighed to get a value, and the value is divided by the volume between the soil separators to get the soil bulk density of different depths.

Description

technical field [0001] The invention belongs to the field of geotechnical technology, in particular to an undisturbed soil fetcher for sandy loose soil. Background technique [0002] Soil bulk density refers to the mass per unit volume of soil in the natural state. The soil bulk density index has important significance in environmental protection, geology, water conservancy, agriculture and construction engineering. The method of measuring the soil bulk density is to extract the soil sample under the premise of keeping the natural state of the soil as much as possible, measure the sample volume and dewatered quality, and the ratio of the sample dewatered quality to the volume is the soil bulk density. The technical key of bulk density determination is how to obtain the soil pattern that keeps the soil in its original state. There are two classic methods for obtaining soil patterns: the ring-knife method and the customary soil method. [0003] The ring knife method is to us...

AI Technical Summary

Problems solved by technology

The advantage of this method is that the sampling efficiency is high, and the disadvantage is that the accuracy is low.

Because when the sampling cylinder is separated from the pipe, it is difficult to control the soil overflow, and the soil at the next depth sampling point is easily agitated by the pressure of the previous sampling point tube shoe 12, which affects the original state of the soil

Images