The asymmetric temperature field is one of the main factors inducing cracking inner shaft lining during freezing-shaft sinking. evolution equation for thermophysical and mechanical properties concrete construction period basis revealing mechanism. In this study, several experiments were conducted to reveal field, thermal conductivity, specific heat capacity, compressive strength, tensile elasti...

Continuously poured paste backfill dramatically improves underground mining efficiency through reduced stope cycle time and simplified logistics. For longhole stopes, a “plug” is to few meters above the undercut brow must gain sufficient strength prevent failure plug when “main” pour begins. A novel, rational engineering design approach that determines required developed. The potential mechanis...

When the vertical joints of monolithic precast concrete structures are cast by self-compacting concrete, design formwork under rational lateral pressure becomes a key technical issue. In this paper, prototype simulation test was conducted for pouring in joint walls. The continuously poured from top with height 2.8 m without any assistance such as delivery tube. measured at different heights var...

Less ergonomic work postures such as bending and squatting have the potential to pose risks. When muscles receive static loads repeatedly for a long time, it causes complaints of damage joints, ligaments, tendons commonly referred musculoskeletal disorders (MSDs) or injuries system. This study aimed determine level risk performed by workers in each activity using Rapid Entire Body Assessment (R...

In the field of construction, surface architectural aluminum formwork for concrete pouring will remain adhesion layer heterogeneous composite structures. view difficulty removing layer, we studied technology and mechanism by laser cleaning in this paper. We analyzed composition distribution characteristics residual on formwork, set up a test system, carried out experiments under different stora...