Backfill sampling device for project supervision

Abstract

The invention discloses a backfill sampling device for project supervision. The sampling device comprises a sampling shell with an external in tapered structure arrangement, the internal of the sampling shell is a cylindrical sampling cavity, multiple guiding fixed columns are uniformly distributed on a device wall of the sampling shell, a pressing plate is arranged at upper parts of the guiding fixed columns, an upper part of the sampling shell is in threaded connection with a thrust cover, the thrust cover is movably connected with a push block, a threaded push rod is formed on the push rod,the threaded push rod is in threaded connection with the pressing plate, and an annular rotary handle is arranged at an end part of the threaded push rod; a material guiding port corresponding to thecylindrical sampling cavity is arranged at the end part of the sampling shell, an anti-backflow inner eave corresponding to the material guiding port is arranged at an inner side of the sampling shell, and a protective cover is arranged at a front end of the material guiding port, so that the fetching can be easier after the resampling and the sampling of the shell are accomplished, a metal rod cannot be remained in the middle of a soil sample, and the sampling stability can be increased; and the protective cover is provided for protecting the soil sample in time after the sampling is accomplished, and the falling of the soil sample can be reduced.

Description

technical field [0001] The invention relates to a sampling device, in particular to a backfill soil sampling device for engineering supervision. Background technique [0002] With the rapid economic growth, there are more and more long-span structures, high-rise buildings, and super high-rise buildings. The requirements for foundation stability are getting higher and higher due to the improvement of design standards and structural loads. The construction quality and construction technology of backfill are also improving. get more attention. After the excavation of the project soil, it will be piled up for backfilling. However, the excavated in-situ soil may not meet the requirements of the backfilling characteristics of the backfilling soil. It is necessary to check the backfilling soil and improve the composition of the backfilling soil according to the inspection results. . Sampling and analysis must be carried out continuously during the treatment process. Therefore, a ...

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Problems solved by technology

[0003] Most of the existing backfill sampling devices adopt straight cylindrical or barb-shaped shells, which are not easy to take out of the shells, and most of the existing backfill sampling devices cannot easily take soil. When taking soil, a metal rod will pass through the middle of the soil sample taken out, which will affect the stability of sampling, and most of them cannot seal and protect the taken soil sample in time, and the soil sample is easy to fall when taking soil

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