The paper considers the mechanical behaviour of a salt rock mass around mine shaft and analyses causes for differences in nature speed deformation relative to analog object. Assuming significant effect carnallite inclusions on physical properties rock, it is proposed combine rocks zones with into unified modelling medium. It justified by solving model problems based monitoring data. Adhering ap...

Durability problem of reinforced concrete for underground structures is a hot issue in the field of structural engineering. For underground structures, the prediction of structural service life and methodology for durability design are needed to estimate structural durability. Taking the case of Xiamen Xiang’an subsea tunnel as background, which is designed to meet the requirement of 100-year s...

Closed-face shielded TBM driven tunnels are supported using precast concrete segmental linings. In the past these types of lining have been assessed without consideration being given to the coupling action along circumferential joints of adjacent rings or the true behaviour of joints along longitudinal joints, especially where these have a taper. The mechanical and geometrical characteristics o...

When constructing tunnels in mountainous areas, the drilling and blasting method is most commonly used because of its economy. Ordinary reinforced concrete itself has defects such as poor crack resistance brittleness. Therefore, when using for ordinary double-line tunnels, vibration phenomena will occur cause cracks first-line which have adverse effects on durability safety tunnel. As a respons...

The linings of tunnels in cold regions with long service lives usually have cracks, parts the structure peeling and falling off, which seriously threatens tunnel safety operation. unsaturated freeze–thaw cycle concrete, is main cause structural deterioration, has not received much research attention. During life regions, cycles deteriorate quality its degree presents a gradual distribution circ...

To prevent sympathetic detonation in a high performance magazine, barriers between stacks of munitions absorb donor fragments. Acceptor munitions may still initiate on impact of barrier debris or on being thrown into the walls of the magazine itself. These shocks can be reduced to a safe level by increasing the barrier's mass which reduces its velocity and the imparted shock. In addition a poro...