Tunnels are an important component of the transportation and utility system cities. They being constructed at increasing rate to facilitate need for space expansion in densely populated urban areas mega-cities. The circular rectangular tunnels cannot completely meet requirements underground exploitation regarding cross-section. Sub-rectangular recently used overcome some drawbacks terms low uti...

Impact pile driving is a multi-component problem which is associated to multi-directional ground vibrations. At first, vibration is transferred from the hammer to the pile and then to the common interface of pile and soil. This is then transferred to the environment and has great impact on the adjacent structures, causing disturbance to residents and also damage to the buildings. It is of high ...

Biomasses are organic materials that are derived from any living or recently-living structure. Plenty of biomasses are produced nationwide. Biomasses are mostly combusted and usually discarded or disposed of without treatment as biomass ashes, which include wood and sugarcane bagasse ashes. Thus, recycling or treatment of biomass ashes leads to utilizing the natural materials as an economical a...

During the operation period of tunnels in urban deep aquifer zones, geological environment around tunnel is complex and surrounding strata are rich groundwater, which often poses a risk structure cracking groundwater leakage, seriously threatening tunnel’s safety. To reduce cracking, theoretical calculation model three-dimensional concrete–soil interaction thermo-mechanical coupling numerical c...

Reasonable model soil is very important in shaking table tests to reduce the distortion of structure stiffness ratio. Several soils, such as sawdust soil, sand, rubber granular powder and kaolin were prepared a dynamic triaxial test proceeded determine their characteristics. The experimental results showed that variation shear modulus damping ratio with strain was consistent undisturbed soil. F...