Clogging during excavation is one of the common problems in mechanized excavation. Among influential factors clogging cutter head, we can mention percentage fine soil particles (under 200 mesh sieve), moisture, and type. In this study, to investigate mechanism tunnel laboratory, a machine laboratory simulator was designed built. The features device are its horizontal operation, low rotation spe...

The confined water is a very important risk source for deep excavation especially in saturated soft soils because failure in control measurements will lead serious consequence not only for the project itself but also for adjacent buildings. There are many risk sources that have close relation with the risks in deep excavation relating to the confined water. Based on the probability and losses o...

INTRODUCTION At the invitation of the Dean and Chapter of Rochester Cathedral, the Canterbury Archaeological Trust carried out an excavation within the Lay cemetery of the Cathedral during April and May 1990. This project, funded by the Cathedral authorities, was undertaken before work began on the consolidation of the foundations of the Chair Store, which is situated between the west side of t...

The design and construction of shallow-buried tunnels in densely populated urban areas involve many challenges. The ground movements induced by tunneling effects pose potential risks to infrastructure such as surface buildings, pipelines, and roads. In this paper, a case study of the Zhongjie subway station located in Shenyang, China, is examined to investigate the key construction techniques a...

BACKGROUND Pulmonary nodular excavation should firstly evoke tuberculosis or necrosis broncho-pulmonary tumor, particularly: epidermoid carcinoma. The case discussed here illustrated these difficulties in patients with rheumatoid arthritis (RA). CASE PRESENTATION A 63-year-old woman was presented with a-three-year history of RA and a recent discovery of an excavated pulmonary nodule. Initial ...

sakiabad is one of the most important sites in the choqakhor pond’s basin which show remains of nomadic settlement in the chalcolithic period. salvage excavation was carried out for two months during autumn and winter of 2011. by digging of five trenches10×10 m, one of the nomadic settlements was exposed with mud and stone architecture made from the local materials in the region. exposed space ...

The construction of tunnels in densely populated urban areas poses a significant challenge terms anticipating the settlement that may result from tunnel excavation. This paper presents new and more realistic modeling method for excavation using Tunnel Boring Machine (TBM). is compared with other reference methods validated model subsurface excavated by TBM slurry shield. A parametric study cond...