Ground-penetrating radar (GPR) detects a tunnel with relatively low-frequency electromagnetic waves, which can result in poorly characterized reinforced steel bar (rebar) hyperbolas and make it challenging to recognize rebar. Thus, the rebar is located by using attenuation reflection coefficients, hyperbolic feature of reconstructed for recognition. Due differences properties other media second...

In coastal cities, some paralleled twin tunnels must be constructed in soft soil layers, and stratum reinforcement is necessary to enhance the stability of tunnel. However, influence construction following tunnel on preceding reinforced strata not clear. This study focuses four kinds strategies: ring right (RR), left (LR), (TR), cement wall between (CR). The interaction mechanism during constru...

To study the influence of shield excavation on surrounding soil, and to control subway tunnel surface settlement deformation buildings, it is necessary additional stress soil caused by law settlement. Combined with a construction project tunnel, this article uses Mindlin solution in elastic mechanics obtain three-dimensional calculation formulas for thrust cutter head displacement field frictio...

Abstract At present, tunnel construction mechanics studies basically do not consider the hardening process of shotcrete. In order to reveal sprayed concrete in a sulfate environment and influence corrosion on stability, model parameters were determined combination with change rules mechanical shotcrete obtained author’s experiment. The MIDAS GTSNX finite element software was used analyze effect...


 In recent years, experimental and numerical researches on the effect of blasting pressure stability existing tunnels was widely obtained. However, during excavation a new tunnel or expansion old an has disadvantages still unclear. Some were carried out to study relationship observed Peak Particle Velocity (PPV) lining areas along direction, due either lack in situ test data difficulty co...

Dealing with engineering structures that are not easily replaceable requires frequent assessment of the damage state of the construction in order to estimate its durability and reliability. The procedures that allow damage to be detected and identified are broadly defined as Structural Health Monitoring (SHM). In this work, a SHM network has been deployed in a road tunnel that intersects a mass...