In this paper, a practical project of subway tunnel lining demolition via blasting for the construction station under action load and weight collapsed rock mass was proposed. The overbreak underbreak quality, failure mechanism structure, particle peak velocity (PPV), stress evolution law surrounding caused by were researched using LS-DYNA. Firstly, results show that parameters presented in pape...

The anterior tarsal tunnel syndrome (ATTS) has first been described by Kopell and Thompson in 1963. The anterior tarsal tunnel is formed by the fascia lining the inferior extensor retinaculum and talus as well as the navicular bone. Many ATTS cases with various etiologies have been reported since the first description. We report here an ATSS case resulting from a fibro-osseous structure that oc...

This paper presents a genetic algorithm for automating the design process for underground tunnels. The tunnel cross-sectional profile must enclose a prescribed minimum space polygon, and for stability the bending moments in the shotcrete lining must not exceed certain limits. The engineer seeks to achieve these aims while minimizing the volume of rock to be excavated. We describe the five param...

Driven by progress in sensor technology, computer software and data processing capabilities, terrestrial laser scanning has recently proved a revolutionary technique for high accuracy, 3D mapping and documentation of physical scenarios and man-made structures. Particularly, this is of great importance in the underground space and tunnel construction environment as surveying engineering operatio...

Tunnel construction in China is increasing year by year. With the passage of time, will usher peak period tunnel engineering repair, and it vital to study advance influential nature lining crack disease as well management measures. By summarising a large amount relevant literature, this paper analyses main locations where cracks are generated linings. Through method finite element numerical ana...

Large section tunnels have huge excavation spans, complex procedures, mutual influence among various multiple disturbances of the surrounding rock, and discontinuous connection linings under different which bring great difficulties to their construction. The Caijianwei Mountain No. 2 tunnel Xiamen Haicang Evacuate-channel project in China belongs a super large tunnel. tunnel’s maximum span reac...

A rapid, precise and automated means for the regular inspection and maintenance of a large number of tunnels is needed. Based on the depth study of the tunnel monitoring method, the CNU-TS-1 mobile tunnel monitoring system (TS1) is developed and presented. It can efficiently obtain the cross-sections that are orthogonal to the tunnel in a dynamic way, and the control measurements that depend on...