Sampling device for geotechnical engineering investigation

Abstract

The invention provides a sampling device for geotechnical engineering investigation, which comprises a box body, a sampling drill bit, a driving mechanism, a depth measuring mechanism and a water suction pump, the box body is divided into a working cavity and a sampling cavity, and the depth measuring mechanism comprises an annular plate, a transmitting pipe and a receiving pipe; before sampling,the depth of to-be-sampled soil is judged according to a to-be-constructed geotechnical engineering structure, after the device body is moved to a to-be-sampled area, water in the sampling cavity is pumped away through the water pump, then the driving mechanism drives the sampling drill bit to be inserted into the soil, and the annular plate arranged on the outer wall of the sampling drill bit canbe blocked on the surface of the soil; the distance between a transmitting tube and the receiving tube is increased, the height between the annular plate and the soil surface can be obtained according to the infrared light transmitting time of the transmitting tube and the infrared light receiving time of the receiving tube, and therefore the depth of the sampling drill bit inserted into soil canbe obtained, and sampling can be conducted after the sampling drill bit reaches the preset depth. And the sampled soil sample can correctly reflect the properties of the base layer.

Description

technical field [0001] The invention relates to the technical field of marine geotechnical engineering investigation, in particular to a sampling device for geotechnical engineering investigation. Background technique [0002] The development of marine resources is of great strategic significance. With the development of the marine industry, the ocean will not only become an important resource and energy base for human beings in the future, but also become the main battlefield for countries all over the world to compete for expansion and development space. Marine geotechnical engineering includes a variety of Typical structures, such as offshore platforms, marine pipelines, and artificial islands, need to survey the construction area before construction. The commonly used survey method is to extract test soil as a test to understand the nature of the base layer. However, the current Some sampling devices mostly use soil augers to collect soil. The soil auger will collect the...

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Problems solved by technology

[0002] The development of marine resources is of great strategic significance. With the development of the marine industry, the ocean will not only become an important resource and energy base for human beings in the future, but also become the main battlefield for countries all over the world to compete for expansion and development space. Marine geotechnical engineering includes a variety of Typical structures, such as offshore platforms, marine pipelines, and artificial islands, need to survey the construction area before construction. The commonly used survey method is to extract test soil as a test to understand the nature of the base layer. However, the current Some sampling devices mostly use soil augers to collect soil. The soil auger will collect the surface soil during the soil extraction process. Due to the high fluidity of the ocean, the surface soil cannot truly reflect the nature of the grassroots, so it will lead to the final investigation. The result is inconsistent with the actual situation, affecting the normal construction of geotechnical engineering

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