Sampling method of large-size completely and heavily weathered red bed sandstone undisturbed sample
A strong weathering, large size technology, applied in the preparation of test samples, sampling devices, etc., can solve the problems of small size, large sample disturbance, and easy water loss of fully weathered and strongly weathered red bed sandstone samples, and achieves a reduction in water loss. The effect of small human disturbance, protection of physical properties, and ease of mechanical handling
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[0032] Example 1:
[0033] Use the following steps to sample large-scale, fully weathered red-bed sandstone undisturbed samples:
[0034] (1) At the selected sampling location, with 1.5 times the designed sampling diameter as the boundary, manually excavate to the designed sampling depth;
[0035] (2) Observe and judge whether the excavation depth is within the set lithology and weathering type, if not, reselect the sampling location, if yes, go to step (3);
[0036] (3) Enlarge the working surface around the intended sampling location to facilitate the operation of the operators and carry samples only;
[0037] (4) According to the outer diameter of the hard round PVC pipe used for sampling, draw a circle on the level to be sampled, and use a hand saw and a ash scraper to scrape the fully weathered sandstone sample into the inner diameter of the hard round pipe Rock pillar
[0038] (5) Put the pre-halved hard round pipe on the rock pillar, fill the void in the hard round pipe with the ...
Example Embodiment
[0043] Example 2:
[0044] Use the following steps to sample large-scale, fully weathered red-bed sandstone undisturbed samples:
[0045] (1) At the selected sampling location, with 1 times the design sampling diameter as the boundary, manually excavate to the designed sampling depth;
[0046] (2) Observe and judge whether the excavation depth is within the set lithology and weathering type, if not, reselect the sampling location, if yes, go to step (3);
[0047] (3) Enlarge the working surface around the intended sampling location to facilitate the operation of the operators and carry samples only;
[0048] (4) According to the outer diameter of the hard round PVC pipe used for sampling, draw a circle on the level to be sampled, and use a hand saw and a ash scraper to scrape the fully weathered sandstone sample into the inner diameter of the hard round pipe Rock pillar
[0049] (5) Put the pre-halved hard round pipe on the rock pillar, fill the void in the hard round pipe with the fine...
Example Embodiment
[0054] Example 3:
[0055] Use the following steps to sample large-scale, fully weathered red-bed sandstone undisturbed samples:
[0056] (1) At the selected sampling location, with 2 times the designed sampling diameter as the boundary, manually excavate to the designed sampling depth;
[0057] (2) Observe and judge whether the excavation depth is within the set lithology and weathering type, if not, reselect the sampling location, if yes, go to step (3);
[0058] (3) Enlarge the working surface around the intended sampling location to facilitate the operation of the operators and carry samples only;
[0059] (4) According to the outer diameter of the hard round PVC pipe used for sampling, draw a circle on the level to be sampled, and use a hand saw and a ash scraper to scrape the fully weathered sandstone sample into the inner diameter of the hard round pipe Rock pillar
[0060] (5) Put the pre-halved hard round pipe on the rock pillar, fill the void in the hard round pipe with the fi...
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