the selection of optimum support system is a key step in the successful design operation of tunneling, rock mass stabilization and minimization of plastic zone extension around a tunnel. in this context, it is not sufficient to rely only on the experiences of design engineers, but taking all effective measures and parameters is necessary to do a proper choice. in this paper, multi attribute dec...

The similar material plays an important role in Geo-mechanical model test, and the proportion influences the test results directly. According to the physical and mechanical properties of the prototype, the cementitious material with good elastic-plastic for iron crystal sand (ISBM) was chosen as the similar material for the research on failure mechanism of surrounding rock under the environment...

We report an unusual case of association of plastic bronchitis (PB) to protein-losing enteropathy (PLE) in a girl of 4 years and 9 months of age with double inlet single left ventricle and ventriculoarterial concordance. submitted to total cavopulmonary surgery. with an intracardiac lateral tunnel at the age of three. The elimination of the 10 cm fibrin bronchial mold (PB) and the alpha-1-antit...

Abstract This research proposes a novel model targeting expansive bedrock by combining an elastoplastic considering electro-chemo-mechanical phenomena with the Cam-clay model, based on considerations of cementation and its degradation owing to plastic deformation. Additionally, tunnel excavation swelling analyses are demonstrated incorporating proposed into finite element analysis code. Specifi...

The induced cracks on the concrete lining of the intake pressure tunnels may cause the water seep into the surrounding media leading to develop a hydro pressure on the external surface of the lining. In the common design practice, the lining can be designed to tolerate with this pressure using the Schleiss method. However, when the tunnel is constructed above the underground water, the seepage ...

Carpal tunnel syndrome is a commonly encountered entity. The tunnel is a narrow space filled with nerves and tendons. Numbness and paraesthesia over the median nerve territory is classical of nerve compression. Pregnancy, hypothyroidism and diabetes are frequent associations, but sometimes no cause can be ascertained. Local pathologies like ganglia and other soft tissue tumors occasionally resu...

The design of underground spaces is mainly carried out using empirical, analytical, and numerical methods. The convergence confinement method (CCM) is an analytical technique that is widely utilized in analyzing the stability of underground spaces. However, the main challenge in the stability analysis is the selection of an accurate constitutive model for rock mass, and particularly, its post-f...

The selection of optimum support system is a key step in the successful design operation of tunneling, rock mass stabilization and minimization of plastic zone extension around a tunnel. In this context, it is not sufficient to rely only on the experiences of design engineers, but taking all effective measures and parameters is necessary to do a proper choice. In this paper, multi attribute dec...