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...

Ground surface settlement under subway tunnel construction is one of the main sources urban ground settlement, which may threaten safety existing buildings. Therefore, it necessary to study influence on and stability subsidence. In current study, originating from operation a tunnel-boring machine (TBM) while excavating double-line that underpasses buildings studied. To this end, numerical simul...

abstract   background: the pathophysiology of carpal tunnel syndrome is associated with increased intracarpal canal pressure. recently, palmaris longus has been introduced as an independent risk factor for the development of carpal tunnel syndrome. the purpose of this study was to assess the association of carpal tunnel syndrome with the presence of palmaris longus tendon and functional superfi...

Thinking ability is one of the skills that must be had by all people in facing demands 21st century, namely critical thinking skills. This skill can achieved delivering material more clear and objective. Thus, purpose this study to know effect implementing blended PjBL integrated century on students’ The sample amounted 39 students fifth semester Biology Education at IAIN Palangka Raya with a n...

Abstract Based on an actual project in Beijing, this article investigates the effect of smoke control strategies extraction efficiency under different fire source locations point system extra-long tunnels using Airpak software. The results show that when a occurs tunnel, tunnel varies greatly depending location and adoption strategies. Due to suction exhaust shaft fan, relative distance between...

RESUME. Le secteur du BTP a connu, ces dernières années, une nouvelle manière de modéliser un projet à travers la maquette numérique, ou le BIM. Ce dernier facilite la communication et la collaboration entre les différents acteurs du projet, particulièrement pour les grands projets avec une géométrie complexe. Inspirés de la notion de co-conception, notre travail consiste principalement à mieux...