The South-to-North Water Diversion (SNWD) is a multi-decadal infrastructure project in China aimed at alleviating severe water shortages north China. It has imposed broad social, economic, environmental, and ecological impacts since 2015, particularly the Beijing-Tianjin metropolitan area. Sentinel-1A/B Interferometric Synthetic Aperture Radar (InSAR) (2014–2021), Global Positioning System (GPS) (2010–2021), hydraulic-head data are used to assess on ongoing land subsidence Tianjin this...

At present, three-dimensional laser scanners are used to scan subway shield tunnels and generate point cloud data as the basis for extracting a variety of information about tunnel defects. However, there obstacles in such pipelines, tracks, signaling systems that cause noise cloud. Usually, huge, efficiency artificial denoising is low. Faced with this problem, based on respective characteristics geometric shape reflection intensity their correlation, paper proposes method. The method...

This article summarizes land subsidence and groundwater level changes that have occurred in the Houston metropolitan area during an eight-year period (2005–2012). The Chicot Evangeline aquifers are major underlie area. Subsidence measurements from 95 permanent global positioning system (GPS) stations 11 borehole extensometers, as well 170 wells screened aquifer 320 aquifer, were investigated. is currently primary source of municipal, agricultural, industrial water for urban rural areas...

Structural health monitoring (SHM) is vital for ensuring the service safety of aging bridges. As one most advanced sensing techniques, Global Navigation Satellite Systems (GNSS) could capture massive spatiotemporal information effective bridge structural (BSHM). Unfortunately, GNSS measurements often contain outliers due to various factors (e.g., severe weather conditions, multipath effects, etc.). All such jeopardize accuracy and reliability BSHM significantly. Previous studies have...

Timely risk information acquisition and diagnosis during foundation pit excavation (FPE) processes are vital for ensuring the safe effective construction of underground urban infrastructures. Unfortunately, diverse geological hydrogeological conditions complex shapes create barriers reliable FPE prognosis control. Furthermore, typical support systems use temporary measures, which have limited capacity to confront excessive loads, large deformations, seepage. This study aims establish an...

Abstract Tianjin, a coastal metropolis in north China, has grappled with land subsidence for nearly century. Yet, emerging evidence suggests notable decrease rates across Tianjin since 2019. This trend is primarily attributed to the importation of surface water from Yangtze River system via South‐to‐North Water Diversion Project, initiated December 2014. Utilizing Sentinel‐1A Interferometric Synthetic Aperture Radar (InSAR) data (2014–2023), this study reveals that one‐third plain either...

Coupling effects of various loading conditions can cause deflections, settlements and even failure in-service bridges. Although it is one the most critical loads, unfortunately, moving vehicles are difficult to capture in real time by bridge monitoring systems currently place for sustainable operation. To fully understand status a bridge, essential obtain instantaneous vehicle load distributions dynamic traffic environment. there some methods that identify overweight vehicles, captured...

Abstract Expansive soils pose a significant challenge in geotechnical engineering, especially coastal areas. While research has mainly focused on their elastic properties, this study explores the overlooked aspect of inelastic subsidence during prolonged droughts, utilizing decade‐long GPS datasets from University Houston Coastal Center. Our findings reveal substantial subsidence, approximately one to two dm, summer droughts 2018, 2020, 2022, and 2023, due compaction within upper 4 m...

The expansion of tunnel scale has led to a massive demand for inspections. Light Detection And Ranging (LiDAR) been widely applied in structure inspections due its fast data acquisition speed and strong environmental adaptability. However, raw point-cloud contain noise point clouds, such as non-structural facilities, which affect the detection lining structures. Methods filtering machine learning have denoising, but these methods usually require lot manual preprocessing. In order directly...

We have established a stable regional geodetic reference frame using long-history (13.5 years on average) observations from 55 continuously operated Global Navigation Satellite System (GNSS) stations adjacent to the Gulf of Mexico (GOM). The frame, designated as GOM20, is aligned in origin and scale with International GNSS Reference Frame 2014 (IGS14). primary product this study seven-parameters for transforming Earth-Centered-Earth-Fixed (ECEF) Cartesian coordinates IGS14 GOM20. stability...

With the rapid development of big data, Internet Things (IoT), and other technological advancements, digital twin (DT) technology is increasingly being applied to field bridge structural health monitoring. Achieving precise implementation DT relies significantly on a dual-drive approach, combining influence both physical model-driven data-driven methodologies. In this paper, two methods are proposed predict displacement dynamic response structures under strong winds, namely, Bayesian Neural...

Shield tunneling under rivers often requires monitoring riverbed deformations in near real-time. However, it is challenging to measure deformation with conventional survey techniques. This study introduces a comprehensive method that uses the Global Positioning System (GPS) of USA and BeiDou navigation satellite system (BeiDou) China monitor during construction twin tunnels beneath Hutuo River Shijiazhuang, China. A semi-permanent GPS network one base station outside river six rover stations...

Structural monitoring and engineering surveys that use the Global Positioning System (GPS) have traditionally performed using a so-called carrier-phase double-difference method in data processing. The requires at least one reference GPS station to be continuously operated field during period. stability quality of would directly affect accuracy displacement measurements rover station. Furthermore, it becomes increasingly difficult maintain "ideal" stations urban environments. This article...

The Long Point Fault is one of the most active urban faults in Houston, Texas, which belong to a complex system normal growth along Texas Gulf Coast. To assess activity Fault, GPS array with 12 permanent stations was installed two sides 16-km-long fault scarp 2013. datasets were processed Precise Positioning (PPP) and Double-Difference (DD) methods. daily PPP solutions respect International Global Navigation Satellite System (GNSS) Reference Frame 2014 (IGS14) converted Stable Houston...

In order to optimize the structure of a subway shield tunnel, minimize injuries, and avoid potential safety hazards, lateral convergence deformation tunnels should be predicted. terms accuracy stability, existing prediction models perform poorly in obtaining value non-stationary small-sized sample tunnel. this paper, model tunnel based on Kalman algorithm is constructed filtering theory. The efficient, adaptive, robust can accurately predict Taking horizontal diameter 200-ring segment...

Terrestrial laser scanning (TLS) has become a powerful data acquisition technique for high-resolution high-accuracy topographic and morphological studies. Conventional static TLS surveys require setting up numerous reflectors (tie points) in the field point clouds registration georeferencing. To reduce surveying time simplify operational tasks, we have developed rapid method that requires only one reflector field. The allows direct georeferencing of from individual scans to an...