The recessive benefit of anchor bolt

Anchor bolt is the most basic constituent part of tunnel support. It reinforces tunnel with surrounding rocks, realizing self-support. Now, anchor bolt can not only applied in tunnel, but also in engineering technology, having reinforcement for slope, mine, dam and infrastructure construction. Especially in fractured rock mass, the function of rock bolt is obvious. In […]

Underground Diaphragm Wall Features in Deep Foundation Pit Supporting Design

During excavation of deep foundation pit, underground diaphragm wall has functions of seepage-prevention, earth retaining and load bearing. Its specific features are as following: 1. Its stiffness is benefit for controlling deformation of foundation pit, especially for foundation pit engineering with narrow space and strict requirement in deformation. 2. It has strong impermeability and vertical […]

The Supporting Theory of Anchor Bolt

The application of anchor bolt in mining industry can track back to the 1930s. Belonging to active supporting, anchor bolt can transform surrounding rock of roadway into supporting body. It has strong adaptability and small deformation. It can ensure safety in production and has brought great economic and social benefit. There are several supporting theories […]

Basic Principles for Supporting Structure Design of Foundation Pit

Foundation pit engineering is systems engineering, belonging to temporary structure, which includes supporting system design and earth excavation, with strong integrity, strong regional, small safety stock and big risk. Supporting structure design of foundation pit should meet design requirements of 3 aspects: stability, strength and deformation. 1. Stability. It mainly refers to stability of surrounding […]

Expansion Shell Rock Bolting in TBM of Tunnel Construction

Diversion tunnel has characteristics of deep burial depth, high crustal stress and complex geological condition. Also, converging deformation is large at segment of deep burial depth, fault and crushed zones are many, joint is complex. So, it needs immediate support after excavation. During tunnel construction, mortar rock bolting can’t provide immediate support, supporting force of […]

The Technology of Ground Anchor System

The Technology of ground anchor system mainly refers to anchor bolt in stratum linking structures with rock soil body, transmitting structures’ tensile force or reinforcing rock soil body by relying on anti-shearing strength to keep stable of structures and rock soil body. Comparing with traditional methods of totally relying self intensity and gravity to make […]

Mechanical Behavior of Self Drilling Rock Bolt’s Load Transfer

The main function of self drilling rock bolt in concrete structure is bear tensile force to cover poor performance of tensile strength and shortage of ductility. Structurally, self drilling rock bolt is divided into anchorage section in rock body, free section between rock body and free section in concrete. Intense water pressure between concrete and […]