2 EXPERIMENTAL MATERIALS AND
METHODS
2.1 Soil
The soil used in the experiment was taken from a slope in Lanzhou City,
Gansu Province. It appears as a light-yellow color, with uniform and
continuous texture, and without large particulate impurities. The basic
physical properties of the soil are shown in Table 1. The soil particle
size distribution curve is presented in Figure 1. According to the soil
classification standards (ASTM D2487/Standard for Soil Test Method
GB/T50123-2019), it is classified as silty clay.。TABLE 1 Basic physical properties of silty clay