Multilevel Collapsibility of Loess under Irrigation in Jinya Town, Gansu Province, China

Figure 4

(a) The structure profile of three kinds of benchmarks for measuring collapsibility. (b) Layout of benchmarks outside the test pit. The four constant benchmarks (benchmarks 49, 59, 69, and 79) farthest from the center of test pit are generally to provide a standard for other benchmarks to be used to measure collapsibility. (c) Layout of benchmarks inside the test pit. The light blue ones are deep-buried steel pipe benchmarks used to measure collapsibility of loess at a specific depth, while other benchmarks are used to measure the total collapsibility inside the pit.

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(b)

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