With the rise of fourth industrial revolution, traditional methods analyzing investment have been transformed into intelligent under big data and Internet Things. This has created a new approach to solving practical engineering problems. paper examines formation evolution application inversion theory in tunnel underground engineering, summarizing research progress using analysis identify three ...

Nest excavation in social insects is an integral part of a colony’s life cycle. Soil-dwelling colonies build complex systems of narrow underground chambers and tunnels spanning thousands of insect body lengths below the ground. The nest excavation is performed by multiple animals simultaneously and is governed by local interactions of the workers with environment and other workers. The challeng...

Seismic liquefaction affects badly the safety of underground structures. For dynamic responses tunnel in liquefied watered sandy stratum one rail transit projects Shanghai, this paper proposes a tunnel-foundation shaking table model test and analyses electrolytic desaturation technology on surrounding soil, which provides some theoretical guidance for seismic designs Shanghai projects. The resu...

The construction of urban underground utility tunnel is a complicated process. With the rapid development urbanization in China, safety problem becoming more and prominent. To evaluate tunnel, this study proposed an evaluation model based on whole life cycle theory. Firstly, combining with characteristics period was divided into four phases: preliminary planning, design, operation maintenance. ...

The area of the tunnel face after blasting is a very important factor in underground excavations where drilling and method used. face, this significant that has affected cost safety constructions case using excavations. Because depends on many different parameters, such as geological conditions located, parameters explosion, other tunnel, it difficult to accurately determine value blasting. Thi...

Aiming at the narrow and long tunnel structure, few internal features, a large amount of point cloud data, existing registration algorithms commercial software results are not ideal, an iterative global algorithm is proposed for massive underground registration, which composed local initial pose acquisition adjustment. Firstly, feature coordinates in extracted, then station-by-station performed...