TY - JOUR
AU - Nie, Chengyu
AB - Mechanically and biologically treated (MBT) waste has significant characteristics such as high stability and low moisture content, which can reduce water, soil, and gas pollution in subsequent treatments. This pre-treatment method is environmentally friendly and sustainable and has become a popular research topic in the field of environmental geotechnical engineering. Using a direct shear test apparatus and five shearing rates (0.25, 1, 5, 10, and 20 mm/min), the shear strength characteristics of MBT waste at the Hangzhou Tianziling Landfill were studied. The results indicate the following: (1) With the increase in horizontal shear displacement, the shear stress of MBT waste gradually increases without a peak stress phenomenon, which is a displacement hardening curve; (2) the shear strength increases with an increase in the shearing displacement rate, and the sensitivity coefficient is 0.64–2.66; (3) a shear strength, shearing rate, and normal stress correlation model is established, and the model has a high degree of fit with the overall experimental data; (4) cohesion (c), internal friction angle (φ), and the logarithm of the shearing rate are linear; (5) the range of c of MBT waste is 22.32–39.51 kPa, and φ is 64.24–68.52°. Meanwhile, the test data are compared with the test data in the literature. The ranges of c and φ of municipal solid waste determined via the shear test are found to be wider than those of MBT waste. The results of this study can provide a reference for the stability calculation of MBT landfills.
TI - Research on direct shear strength characteristics of mechanically biologically treated waste
JF - Environmental Science and Pollution Research
DO - 10.1007/s11356-021-14935-x
DA - 2021-11-01
UR - https://www.deepdyve.com/lp/springer-journals/research-on-direct-shear-strength-characteristics-of-mechanically-kYiq4v4wHt
SP - 59844
EP - 59857
VL - 28
IS - 42
DP - DeepDyve
ER -