This study investigated the vault settlement characteristics of an unsymmetrically loaded tunnel which was excavated by annular excavation via core rock support method. Response surface methodology (RSM) was employed to design the experiments, evaluate the results with the purpose of optimizing the value of design parameters for reducing the vault settlement. The parameters such as horizontal d...

The Fuzzy Vault scheme is an encryption scheme, which can tolerate errors in the keys. This leads to the possibility of enhancing the security in environments where these errors can be common, such as biometrics storage systems. Although several researchers have provided implementations, we find that the scheme is vulnerable to attacks when not properly used. This paper describes an attack on t...

the result of transvaginal sacrospinous ligament fixation technique, as part of the vaginal repair procedure for massive uterovaginal (pelvic organ prolapse stage iii and stage iv and vault prolapse) is evaluated. a total of 32 women were included in the present case series. marked uterovaginal prolapse was present in 28 women and four had vault prolapse following hysterectomy. patients with va...

Loess geological tunnels are characterized by weak structure and poor self-stability of surrounding rock, so effectively controlling the excavation face distances different caverns is great significance for guiding safe construction large-section tunnels. Based on loess tunnel from Xi’an Metro Line 4, optimal distance determined based Midas numerical model. Then, surface settlement horizontal d...

This research was undertaken to predict the result of vault settlement during excavation super-large-span tunnels in soft rock strata, which are prone deformation and hard aftermaths. Numerical simulation applied tackle with problems such as proneness prediction on settlement. As a result, model for continuous tunnel face keeps advancing proposed, influencing factors span depth taken into consi...

Based on the shield tunnel construction of left line Guowei road station-Qingshan lake west station Nanchang metro 3, study focuses adverse effects segment convergence and settlement deformation vault arch bottom in process water-rich complex stratum. The time-space curves value typical monitoring sections are drawn, their variation laws analyzed, values data analyzed tested. analysis results, ...

The optimization design of the section morphology of large-span tunnels plays an important role for saving cost and improving the engineering stability. The flat ratio of tunnel which is as an important control index, its rationality is the key problem in the design of tunnels. Program with Python to set up the dynamic calculation model of a large-span tunnel planned to be constructed which can...

This paper takes the project of Hejiaying Station Xi'an Subway Line 2 as background for study. The dynamic numerical simulation construction process station by PBA method is carried out using 3D finite element method. changes surface settlement, vault headroom convergence and structural stresses are studied up to intersection guide tunnel large section duct. research results show that: upper ho...