Rock bolting for foundation support pit

14/dic/2015 11:20:52 sinorockzqq Contatta l'autore

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Rock bolting construction is a strong technical work, each working procedure must be meticulous operation, otherwise it will effect the entire length of soil nail 

construction quality due to the negligence of a process .As a result, the operator must have a high technical quality, a clear division of responsibilities.

Rock bolting as an active supporting technology which is developing rapidly in recent years , suitabled for similar reinforcement and deep foundation pit supporting.

The principle of Rock bolting design technology

The principle of Rock bolting design is using the superiority of rock bolt relatively strong tensile, shear and bending strength (mainly by tensile) for making up the inadequacy of their natural soil shear strength.The effect of Soil nailing with soil reinforcement through the cohesive force and frictional resistance interface between soil and Rock bolting (relative deformation in soil and soil nail) was able to play. On the other hand,soil nails which gathering in the soil have the effect of the space frame, cooperate with spraying concrete slabs, soil - soil nailing - panel interaction, working together as a whole, make the whole stiffness of soil greatly increased after reinforcement, deformation performance also improved, which become a kind of good performance of active supporting system.

The applicability of the Rock bolting design supporting technology

Rock bolting is suitable for the soil which can meet the requirement of certain temporary stability capacity since the excavation of the underground water level in the final the following or after precipitation.

Rock boltingdesign process

Process flow is: the excavation of foundation pit - trimming slope - production of rock bolt - drilling rock bolt holes - installation of rock bolt - anchor to slurry - steel mesh - shotcrete.

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