Prestressed anchor support is one of the most important methods for coal mine roadways. As mining depth increases, adaptability existing prestressed has become weaker and weaker, which mainly reflected in current prestress much smaller than resistance required stability roadways makes it difficult to effectively control In order solve problem, a group structure was proposed realize higher techn...

A new type of precast pile, namely steel strand square piles with reinforcement (PRS), is proposed in present study, which uses as a prestressed and equipped hot-rolled reinforcement. Two kinds full-scale pile specimens different were constructed to study the bending performance by tests. The finite element model was also performed differences resistance, deformation capacity, crack failure mod...

The study object is a prototype of composite bridge prestressed concrete beam with length 42.0 m for road desks perception impact from motor vehicles in the form A14, NK-120 and NK-180 loads.