Analysis of the dynamic response of the new interchange channel closely under the existing line.

The vibration caused by the existing operating metro has a negative impact on the construction of new metro lines and the nearby surroundings. The focus of this study is the confined interchange area between Beijing Metro Line 17 and Shilihe Station of Line 10. In the study area, the interchange between Shilihe Station of Line 10 and Line 17 has a confined frame structure that is already in operation without any overburden between the existing line and the new line; therefore, the vibration of the operating subway interferes with the construction.

The Effect of Micron-Sized TiB Particles on the Properties of Al6061 Strengthened with 4% TiB Nano-TiB.

Dual-scale (nano and micron) particle-reinforced TiB/6061Al matrix composites with different contents of TiB were prepared using powder metallurgy, and then analyzed via microstructure observation and tests of microhardness, tensile properties, and friction and wear properties. The 6061Al powders' particles changed from spherical to flaky after two rounds of high-energy ball milling, and the TiB enhancer was embedded in or wrapped by the matrix particles after high-energy ball milling. Metallurgical bonding between TiB particles and the matrix was achieved, and AlTi was synthesized in situ during sintering.

Exploring Environmentally Friendly Biopolymer Material Effect on Soil Tensile and Compressive Behavior.

The study of the high-performance of biopolymers and current eco-friendly have recently emerged. However, the micro-behavior and underlying mechanisms during the test are still unclear. In this study, we conducted experimental and numerical tests in parallel to investigate the impact of different xanthan gum biopolymer contents sand.