Abstract As the modernisation of cities, railway road construction and existing lines are demanded during past decades more than before. Demand short travel time is one reasons that we redesign existed roads process. Tunnel ways can shorten in roads. In this study, introduced commonly used tunnel methods, New Austrian Tunnelling Method (NATM), some important points method regarding excavation b...

Penelitian ini bertujuan untuk mengetahui kompetensi yang dikuasasi siswa selama pembelajaran daring pada saat New Normal dengan menggunakan project based learning. Peneliti metode kualitatif deskriptif. dilakukan di SD IT Uswatun Hasanah jumlah sampel 15 terdiri dari 11 laki-laki dan 4 perempuan. Hasil penelitian menunjukan bahwa model learning dapat dilaksanakan efektif media whatsapp zoom me...

the effect of underground cavities in site seismic response was studied over the subway tunnels that are under construction in the city of karaj, using ambient noise measurements as well as numerical modeling. the idea for this research comes from the observation of differences in experimental site transfer function, calculated on more than 100 locations of the city, for the areas near the unde...

The lining structure of Tunnel Boring Machine (TBM) excavated tunnels is composed of series of precast Reinforced Concrete (RC) pieces which are called segment. At the present paper, a novel method is introduced for seismic retrofitting of segmental tunnels located at active fault zones in rock environment with case study of Amirkabir dam to Tehran water transfer tunnel (Karadj tunnel). The mai...

In order to research the theory for variety of transverse forces adjacent shield tunnels caused by foundation pits excavation, effect mechanism pit excavation on tunnel was analyzed. The sidewall unloading model pit, considering deformation retaining structures, introduced calculate additional stress soil excavation. On this basis, confining pressure variation established, influence longitudina...

Tunnel engineering develops rapidly. To study the dynamic response of shield tunnel structure and its bottom soil layer caused by metro train operation, a three-dimensional finite-difference calculation method is used to establish tunnel-soil coupling model based on project Maluan Central Station-Jimei Island Station Xiamen Metro Line 6, operation calculated. The results show that: Under action...

Abstract For tunnel deformation analysis using traditional measurement methods to obtain section data, there are problems such as small data coverage and low efficiency. 3D laser scanning technology has the advantages of automatic, high precision efficiency in collecting point cloud target object, can completely accurately express entity. Based on acquired by scanner, engineering modeling resea...

I N October 1997 four cows on a farm situated on the Halland Ridge in southern Sweden died after drinking water from a nearby stream. The water was contaminated with acrylamid which, it emerged, came from a nearby 10 kilometre railway tunnel construction site. The railway project had been plagued by trouble from the beginning. The Halland Ridge is a `horst', a heap of earthcrust formed by tecto...