The accurate estimation of rock strength is an essential task in almost all rock-based projects, such as tunnelling and excavation. Numerous efforts to create indirect techniques for calculating unconfined compressive (UCS) have been attempted. This often due the complexity collecting completing abovementioned lab tests. study applied two advanced machine learning techniques, including extreme gradient boosting trees random forest, predicting UCS based on non-destructive tests petrographic...

Tunnelling-induced ground movements are complicated and investigations into them normally require some simplifications. This paper provides a brief literature review which highlights the advantages of adopting simplifications in physical modelling addresses deficiencies assessment soil deformation due to simulated tunnel excavation. A set centrifuge tests heading located at different depths clay was carried out 125g. The modelled by semi-circular cavity partly supported stiff lining. unlined...

The rapid development of modern metropolises has led to a shortage surface space and, in response, engineers have pursued alternatives below ground level. Shafts are commonly used provide temporary access the subsurface for tunnelling as permanent works, utilised lifts or ventilation purposes. construction sequence axisymmetric shafts makes them dramatically simple solution. In addition, circular inherently stiffer than other plan geometries. Those perhaps reasons why preferred situations...

Accurate settlement forecasting is essential for preventing severe structural and infrastructure damage. This paper investigates predicting tunneling-induced ground settlements using machine learning models. Empirical methods estimating are often imprecise site-specific. Developing novel, accurate prediction critical to avoid catastrophic The umbrella arch method constrains deformations initial stability before installing primary support. study develops models forecast solely from...

A newly developed imaging system is presented, which measures three-dimensional (3D) deformations of a soil surface in geotechnical experiments involving physical modelling. The method adopts the computer vision technique ‘structure from motion and multi-view stereo’ delivered by an open-source software MicMac. Three, 2 megapixel industrial cameras were synchronised used to capture images deforming surface. reconstruct observed scene high-density, accurate 3D point cloud. new has been...

Three-dimensional (3D) in vitro tissue or organ models can effectively mimic the complex microenvironment of many types human tissues for medical applications. Unfortunately, development 3D cancer models, which involve cancer/stromal cells a environment, has remained elusive due to extreme complexity tumor (TME) and stepwise progression cancer. Here, we developed hepatocellular carcinoma (HCC) consist fibroblasts as stromal cells, HCC nanofibrous membrane TME. The were fabricated using three...

Digital agriculture, incorporating artificial intelligence, IoT, and big data, is becoming a crucial trend in Vietnam to address challenges posed by population growth climate change. The Ministry of Agriculture Rural Development has devised Transformation Plan confront these challenges, particularly significant nation heavily reliant on agriculture. Our research employs multi-method approach assess the contribution digital agriculture Vietnam’s economic development, focusing private...

The forepole umbrella system (FUS) uses steel pipes installed from within a tunnel to provide canopy above the heading that both increases stability and reduces tunnelling-induced ground movements. Although is known be beneficial has been used in number of projects, there little information on how key parameters including length stiffness combine produce effective support. To investigate this, centrifuge tests incorporating three-dimensional (3D) geometry clay model FUS have undertaken. was...

This study aimed to investigate the short-run effects of natural disasters on household's welfare in rural Vietnam over period from 2014 2016 by exploiting panel regression (FEM and REM) analyze data Household Living Standard Survey (VHLSS).The results show that are negatively associated with welfare.In particular, households flood-affected areas storm-affected have 8.8 percent 8.65 lower per capita household income than non-affected respectively.Likewise, 7.54 expenditure areas.Similarly,...

Shafts are frequently constructed to allow access subsurface infrastructure and the resulting excavation is generally deep narrow. may be using a variety of methods plan forms dependent on ground conditions intended use. An axisymmetric (cylindrical) geometry often preferred due relatively simple structural analysis, construction method for fact that number approaches available estimate movements around such an excavation. In certain cases, particularly when there restricted space both above...

New developments in the theory and practice of tunnel construction are essential for industry to progress but it is relationship between these two areas that equally as important. Tunnelling has greatly benefited from laboratory research; specifically, centrifuge modelling linked with field measurements. The wide body work on single tunnels led identification parameters techniques widely accepted predicting assessing magnitude extent tunnelling ground movements. However, usage twin urban...