The analysis of the behavior soil and foundations when piles in offshore areas are subjected to long-term lateral loading (wind) is one major problems associated with smooth operation superstructure. strength pile-soil system influenced by variations water content soil. At present, there no studies carried out analyzing mechanical deformational both material laterally loaded groundwater level as a variable. In this paper, series 1-g model tests were conducted explore monopile under...

The frontline anti-tuberculosis medication isoniazid is extensively utilized in clinical practice. However, its overdose can severely compromise human health. Consequently, developing a sensitive and straightforward electrochemical sensor for detecting of paramount importance. Utilizing direct-current arc plasma technology, nanocomposite known as FeN0.0499-Fe@C (FNFC), which integrates magnetic transition metals, metal nitrides, carbon materials, has been synthesized. Based on this...

In order to achieve more efficient management of BIM technology in the field tunnel construction, this paper took Zhuhai Dahengqinshan No. 1 Tunnel as project background and studied visualization construction process based on technology. Firstly, we created 3D geological model by using Revit, 3dsmax, other software. Secondly, detailed design was carried out, there no gap after checked ABAQUS Then, problems between disciplines conducted collision inspection model. Finally, out 4D progress...

Taking the shield tunnel project of Guangzhou Metro Line 8 from Tongdewei Station to Shangbu as research background, using method finite element simulation and site monitoring, this paper analyses influence rules tunneling on ground subsidence under condition different hard rock height ratios. The results show that in process crossing ratio composite stratum, decreases, value settlement decreases tank becomes shallow. surface strata is obviously different, maximum difference about 8.6 mm;...

This study defined the height ratio of soft-rock strata and established a numerical model for analyzing shield construction in upper-soft, lower-hard composite together with field monitoring data. In this way, influence tunneling while passing under pile foundation culvert at short distance (the shortest is 1.4 m) typical Guangzhou can be examined. Moreover, reinforcement effects ground, bridges, culverts, using strata-reinforcing plan dominated by metro jet system (MJS) narrow space, are...

With the development of urban metro systems, shield tunnels that pass through existing bridge pile foundations have become an inevitable engineering problem. Therefore, ensuring stability strata and piles during tunnel construction is a common goal in practice. Currently, research on mechanical responses under different conditions upper-soft lower-hard composite tunneling has not been conducted extensively. This paper presents numerical simulation passing foundation strata. Subsequently,...

Based on the theory of rainfall infiltration, surface infiltration model multilevel filled slope was established by using SEEP/W module GeoStudio. The changes volumetric water content (VWC) and pore pressure (PWP) in during were analyzed, influence change conditions VWC PWP considered. analysis showed that increased when rain fell, growth rate higher feature point higher. affected area concentrated upper part about 0.75 m. With increasing intensity, getting to transient saturation state...

The pile–beam–arch method (PBA) is increasingly being used in the construction of metro stations with complex traffic conditions. rise–span ratio arch not only affects height station, but also rationality design subway and safety construction. mechanical response steel pipe piles different ratios effect controlled surface settlement have been investigated interactions involved pile–soil system. In this paper, finite element model each was established, demonstrated by comparing numerical...

The blockage or failure of the drainage holes will endanger stability slopes and traffic safety a highway tunnel. This paper studies an algorithm for automatic classification hole degree based on convolutional neural network transfer learning to explore intelligent detection method blockage. model is adopted input image samples retrain pretrained classify new images. Experiments are performed collected images, accuracy different models compared, ResNet‐18 being best. performance compared...

The drainage systems of tunnels situated in limestone regions frequently encounter crystallization blockages. Numerous studies have addressed this issue, and their findings identified factors such as the flow velocity temperature influencing process. However, these could not predict occurrence crystallization. Regarding theoretical approaches, most focused on full-pipe operations or solely considered flow-field dynamics without including simulations chemical reactions mass transfers. This...

In this study, based on the elastic foundation beam theory, a local model has been developed. Using model, mechanical characteristics of effect tunnel-filled karst lining structure investigated. Incorporating characteristic area, formulas for displacement, bending moment, and shear force an equivalent have derived. By applying to under different working conditions, such as cavern sizes compression modulus ratios filling media, analyses states carried out. The results show that if ratio media...

Ground deformation and additional stress on the segments of firstly constructed tunnel may change significantly due to construction another tunnel, which is closely spaced with existing one. A poor geotechnical condition possibly leads interaction between such tunnels even making it harder build tunnels. practical project located in Guangzhou City, China, consists two parallel smallest distance 2.6 m, sat an upper‐soft lower‐hard stratum. 3D finite element model has been proposed numerically...

Projects involving junctions of light and dark tunnel in mountainous areas are complex engineering problems that combine structure, slope rock-soil mass protection projects. Such suffer from a changeable load. The stress deformation the junction varies under different conditions. Thus, it is major source inconvenience for construction monitoring operations. In this paper, according to load conditions at tunnel, we divide hole into thrust, compression, combined thrust-compression types. Three...

Microsurfacing is a standard preventive maintenance technology developed on the basis of slurry sealing technology. However, high temperature and rainy season in Guangdong Province affect its expanded application because low water resistance short service life. So, high‐performance microsurfacing, new microsurfacing technology, has been developed. The key to this technique an appropriate proportion water‐based epoxy resin waterborne curing agent, which could generate chemical reaction form...

The underground hole pile excavation method causes a large vertical displacement in weak stratum, which affects the safety of structures. For first time, is being used to construct subway station South China, and settlement law area not clear. It important clarify deformation strata effect achieved by appropriate reinforcement measures. In this paper, establishing three-dimensional finite element model structure–soil contact combining it with field monitoring data, surface caused different...

As the groundwater in karst areas is rich calcium ions, when flows out of tunnel drainage pipe, carbonate crystals will be precipitated and then adhere to pipe wall, which easily cause chemical blockage thus affecting efficiency leading increase water pressure outside lining, safety stability structure. Therefore, drains one most important problems for safe normal operation tunnels. In order quantify qualify process crystalline system tunnels areas, this paper constructs a numerical model...