Determination of horizontal, displacements of structures by right-angle intersection

1981 ◽  
Vol 15 (8) ◽  
pp. 462-464
Author(s):  
I. S. Rabtsevich
Keyword(s):  
Horizontal Displacements

scholarly journals Determination of cracking causes in building structural elements

2021 ◽  
Vol 258 ◽  
pp. 09038
Author(s):  
Valentina Halushko ◽  
Alexandr Meneiliuk ◽  
Stanislav Kyryliuk
Keyword(s):  
Residential Buildings ◽  
Residential Building ◽  
Normal Operation ◽  
Theoretical Problem ◽  
Structural Elements ◽  
Regulatory Requirements ◽  
Different Depths ◽  
Base Soil ◽  
Horizontal Displacements

The article deals with the problems of buildings built many years ago, in which current and major repairs were not carried out in an appropriate manner. At the same time, buildings experience various deformations, such as yield, heel, subsidence, deflections, bends, twists, distortions, horizontal displacements. The survey of residential buildings built in the 80s is described and the analysis of the results of the survey of one of these buildings is carried out. The theoretical problem of the distribution of moisture in depth and various degrees of soil moisture has been solved. The reasons for the appearance of cracks in structures and cracks between individual building elements are also determined. The survey of a 9-storey brick residential building, built in the late 80s, which is in the period of normal operation, is considered. At the same time, the considered building is operated with significant deviations from regulatory requirements. The causes of cracks in individual structures and cracks between individual elements in the building are found. The problem of the distribution of moisture in depth with local soaking is solved on the basis of a numerical method, and the character of soil moistening at different depths with different degrees of moistening and characteristics of the base soil is obtained.

MINING-INDUCED SURFACE HORIZONTAL DISPLACEMENT: THE CASE OF BW PROSPER HANIEL MINE / ANALIZA PRZEMIESZCZEŃ POZIOMYCH POWIERZCHNI TERENU WYWOŁANYCH PODZIEMNĄ EKSPLOATACJĄ GÓRNICZĄ NA PRZYKŁADZIE KOPALNI BW PROSPER HANIEL

2013 ◽  
Vol 58 (4) ◽  
pp. 1037-1055 ◽  
Author(s):  
Krzysztof Tajduś
Keyword(s):  
Coal Mine ◽  
Underground Mining ◽  
Horizontal Displacement ◽  
Factor B ◽  
Complex Study ◽  
Displacement Factor ◽  
Horizontal Displacements

Abstract The paper presents a wide-ranged analysis of horizontal displacements in the region of underground mining exploitation. Initially, various theories pertaining to the determination of mining-induced horizontal displacement are discussed, followed by a complex study on horizontal displacements measured for a selected example region of the German coal mine BW Prosper Haniel, as well as the determination of displacement factor B.

Influence Of Subsidence Fluctuation On The Determination Of Mining Area Curvatures

2015 ◽  
Vol 60 (2) ◽  
pp. 487-505 ◽  
Author(s):  
Andrzej Kowalski ◽  
Eligiusz Jędrzejec
Keyword(s):  
Confidence Intervals ◽  
Hazard Assessment ◽  
Significant Influence ◽  
Mining Area ◽  
Random Dispersion ◽  
Horizontal Displacements

Abstract The article concerns the random dispersion of deformation indicators, especially the influence of subsidence fluctuation on the distribution of inclinations and curvatures. Surface curvatures have significant influence on building objects. The article includes the probability studies of displacement fluctuation for two arbitrarily close but different points. It was determined, if the probability is dependent on each other or not. Therefore, the separate deformation indicators can be considered to damage hazard assessment of building objects, if their standard variation of fluctuation is well determined (dependent on the fluctuation of vertical and horizontal displacements). Consequently, it is possible to determine the confidence intervals of fluctuation for all separate deformation indicators. Even in a case of low values of predicted separate curvatures, their values can be significant higher when considering their natural dispersion.

scholarly journals UAV Applications for Determination of Land Deformations Caused by Underground Mining

2020 ◽  
Vol 12 (11) ◽  
pp. 1733
Author(s):  
Paweł Ćwiąkała ◽  
Wojciech Gruszczyński ◽  
Tomasz Stoch ◽  
Edyta Puniach ◽  
Dawid Mrocheń ◽  
...  
Keyword(s):  
Land Surface ◽  
Surface Deformation ◽  
Underground Mining ◽  
Vertical Displacement ◽  
Deformation Monitoring ◽  
Case Scenario ◽  
Vegetation Growth ◽  
Vertical Displacements ◽  
Horizontal Displacements

This article presents a case study that demonstrates the applicability of unmanned aerial vehicle (UAV) photogrammetric data to land surface deformation monitoring in areas affected by underground mining. The results presented include data from two objects located in the Upper Silesian Coal Basin in Poland. The limits of coordinate and displacement accuracy are determined by comparing UAV-derived photogrammetric products to reference data. Vertical displacements are determined based on differences between digital surface models created using UAV imagery from several measurement series. Interpretation problems related to vegetation growth on the terrain surface that significantly affect vertical displacement error are pointed out. Horizontal displacements are determined based on points of observation lines established in the field for monitoring purposes, as well as based on scattered situational details. The use of this type of processing is limited by the need for unambiguous situational details with clear contours. Such details are easy to find in urbanized areas but difficult to find in fields and meadows. In addition, various types of discontinuous deformations are detected and their development over time is presented. The results are compared to forecasted land deformations. As a result of the data processing, it has been estimated that the accuracy of the determination of XY coordinates and the horizontal displacements (RMS) in best case scenario is on the level of 1.5–2 GSD, and about 2–3 GSD for heights and subsidence.

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