Roadbed filler swelling capacity tester and testing method and sample preparation method thereof

Abstract

The invention relates to a soil test instrument, in particular to a roadbed filler swelling capacity tester which comprises a test cylinder and a dial indicator, the upper end of the test cylinder is open, a sample in a compacted state is filled in the test cylinder, the dial indicator is vertically and detachably connected to the upper portion of the test cylinder, and a measuring head of the dial indicator abuts against the upper portion of the sample through the upper end opening of the test cylinder. Due to the fact that the sample is subjected to water immersion testing after actual roadbed filler construction is simulated and compacted, the state of the sample is close to the state of actual roadbed filler, the swelling amount of the sample can reflect the swelling amount of the actual roadbed filler more accurately, and the purpose of improving the testing precision of the swelling amount of the roadbed filler is achieved.

Description

technical field [0001] The present application relates to a geotechnical testing instrument, in particular to a roadbed filler expansion tester, a testing method and a sample preparation method thereof. Background technique [0002] Under natural environmental conditions, affected by factors such as weather humidity, groundwater, and natural precipitation, the roadbed filler will expand to a certain extent. When the expansion of the roadbed filler is too large, the roadbed will be deformed, which will seriously affect the safety of railway traffic. , so it is necessary to know the expansion amount of the roadbed filler through the expansion test to determine whether the roadbed filler is qualified. [0003] At present, the test personnel will conduct the fine-grained soil swelling test listed in the geotechnical test specification, so as to know the swelling amount of the fine-grained soil, and then indirectly know the swelling amount of the roadbed filler composed of fine-g...

AI Technical Summary

Problems solved by technology

[0004] In view of the related technologies mentioned above, the roadbed filler will be compacted during actual construction. At this time, the roadbed filler will produce a small amount of deformation. Therefore, the expansion of the fine-grained soil itself cannot accurately reflect the actual expansion of the roadbed filler. Therefore, the The test accuracy of expansion of roadbed filler is low

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