GROUND SURFACE DEFORMATION OF THE URBAN AREA IN COMPLEX ENGINEERING-GEOLOGICAL CONDITIONS IN THE SINKING TOWN OF TUZLA (BOSNIA AND HERZEGOVINA)

2011 ◽  
Author(s):  
Indira Sijercic
Keyword(s):  
Urban Area ◽  
Bosnia And Herzegovina ◽  
Surface Deformation ◽  
Ground Surface ◽  
Geological Conditions ◽  
Complex Engineering

Comparison for Support Patterns of Temporary Shaft for Construction in Silty Clay

2012 ◽  
Vol 204-208 ◽  
pp. 1809-1816
Author(s):  
Yi Xiao Cui ◽  
Jian Jia ◽  
Shun Hua Zhou
Keyword(s):  
Surface Deformation ◽  
Ground Surface ◽  
Reference Value ◽  
Simulation Method ◽  
Calculation Model ◽  
Silty Clay ◽  
Geological Condition ◽  
Geological Conditions ◽  
Cut Method ◽  
Bored Piles

Based on a temporary shaft for construction, this paper compared two supporting patterns in the geological condition dominated by silty clay, the open-cut method with tunneling support and the bored piles supporting method, in the respects of ground surface deformation, the envelope structure deformation and the steel brace forces, using the numerical simulation method. And by comparison of the numerical results with the monitoring data, it is verified that the calculation model and methods of analysis are rational. Furthermore, the open-cut method with tunneling support is recommended as the better supporting method that can both ensure the structure safety and economy in areas of similar geological conditions. The paper has some reference value for shaft supports under similar construction conditions.

Numerical Analysis of Tunnel Excavation Method at Greatly Cross Undermine Huangzhuang Station of Beijing Subway

2011 ◽  
Vol 243-249 ◽  
pp. 5789-5793
Author(s):  
Jin Shui Xie ◽  
Ming Zhou Bai ◽  
Zhao Yi Xu ◽  
Ming Xing Xu ◽  
Zhu Shi ◽  
...  
Keyword(s):  
Numerical Calculation ◽  
Numerical Analysis ◽  
Surface Deformation ◽  
Ground Surface ◽  
Side Wall ◽  
Tunnel Construction ◽  
Tunnel Excavation ◽  
Geological Conditions ◽  
Numerical Calculation Method ◽  
Beijing Subway

Combined with the geological conditions and the project features, the selection problem of pilot tunnel construction method of Huangzhuang station is solved. Directing at the commonly used method including CD method, CRD method and double side wall pilot tunnel method, FLAC3D numerical calculation method is adapted to analysis and predict the ground surface deformation and supporting structure hand features. Through analyzing the size and law of surface settlement in this section, the feasibility and differences of these methods is concluded and analyzed. And finally an example is given.

Application Of Lime Marl In The Formation Of Areal Groundwater Mounds Of The Imereti Lowlands

2019 ◽  
pp. 105-111
Keyword(s):  
Surface Deformation ◽  
Olympic Games ◽  
Drainage System ◽  
Crushed Stone ◽  
Protection Measures ◽  
Geological Conditions ◽  
Carbonate Material ◽  
Complex Engineering ◽  
Surface Settlements ◽  
Engineering Protection

The article deals with the experience of applying lime marl in the formation of engineering protection embankments on the unique territory of the Imereti Lowlands in terms of its engineering and geological conditions. It is known that this site became a place for construction of various facilities for carrying out a wide complex of sports actions of the Olympic Games-2014 (coastal cluster). It is shown how under complex engineering and geological conditions, engineering protection measures were realized. On the support sites - an experiment on the use of local carbonate material for backfilling of soil embankments of engineering protection was executed. Three versions of the backfilling of carbonate soil were used. It is established that the crushed stone mixture of lime marl in the course of 1-2 years of operation of the engineering protection structure increased the parameters of its mechanical properties due to natural cementing ability. In the case where the crushed stone mixture of lime marl was above the groundwater level, calcium oxide contributed to the strengthening of the rock, releasing the cementing layers of the compound. This confirmed the opening of the contact of the underlying soils and soils of engineering protection, as well as the absence of surface deformation in these areas during the operation of the erected structures. In the areas of quarters where the crushed stone mixture of lime marl was flooded as a result of malfunctions of the drainage system, surface settlements and deformations of the structures occurred.

Numerical Investigation of Shield Cross Tunnel Minimum Cover Depth

2012 ◽  
Vol 256-259 ◽  
pp. 1270-1275
Author(s):  
Guang Ming Li ◽  
Jin Li Qiao ◽  
Pei Chen
Keyword(s):  
Surface Deformation ◽  
Three Dimensional ◽  
Ground Surface ◽  
Subway Tunnel ◽  
Cover Depth ◽  
Minimum Cover ◽  
Geological Conditions ◽  
Dimensional Finite Element ◽  
The Cross ◽  
Three Dimensional Finite Element

With the development construction of subway in the city, the cross tunnel is becoming common. However, due to the geological conditions of the subway which limited the minimum depth of the shallow overburden of the tunnel is not the same. In this paper, according to the mechanical characteristics of the cross subway tunnel in several typical soil, a three-dimensional finite element mode is established. And to find out the discipline of minimum cover depth in vertical cross the tunnel by researching tunnel shield excavation the ground surface deformation characteristics.

Engineering-Geological Studies Of The Territory, Soils Of Foundation And Foundations Of The Architectural Monument Of The "Melnikov’s House" In Moscow

2019 ◽  
pp. 41-51
Keyword(s):  
Working Condition ◽  
Overlying Water ◽  
North East ◽  
The North ◽  
Geological Processes ◽  
Architectural Monument ◽  
Geological Conditions ◽  
Zone Of Influence ◽  
Complex Engineering ◽  
Building Engineering

On the basis of engineering and design surveys of the building, engineering-geological and geophysical studies of the soils of the territory conducted by the article authors, as well as with due regard for the results of studies conducted on this territory by other authors, the features of the foundations, soils of their foundation and engineering-geological conditions of the territory of the Melnikov House are established. It is shown that the Melnikov house is located under complex engineering-geological conditions on the territory of high geological risk, in the zone of influence of tectonic disturbance. To the North of the area there is a zone of intersection of the observed disturbance with a larger disturbance that can have an impact on geological processes. To the North-East of the site of the Melnikov House, a sharp immersion of the roof of carbon deposits was revealed. It promotes groundwater seepage into limestone of the carbonate strata from overlying water-bearing sands and activation of processes of suffusion removal and sinkhole phenomena of the soil. The surveyed area is assessed as potentially karst-hazardous and adjacent to it from the North-East territory as karst-dangerous. In this regard any construction on the adjacent territory can provoke activation of sinkhole phenomena on the surface. The foundations of the building are basically in working condition. Existing defects can be eliminated during repair. The foundation soils mainly have sufficient bearing capacity. Areas of the base with bulk soil can be reinforced. However, when developing a project for the reconstruction of the building and its territory, it should be taken into account that the design of the Melnikov House does not provide for its operation on the loads at the formation of sinkholes.

scholarly journals Imaging ground surface deformations in post-disaster settings via small UAVs

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Richard L. Ybañez ◽  
Audrei Anne B. Ybañez ◽  
Alfredo Mahar Francisco A. Lagmay ◽  
Mario A. Aurelio
Keyword(s):  
Surface Deformation ◽  
Ground Surface ◽  
Point Clouds ◽  
Lateral Spreading ◽  
Fault Movement ◽  
Field Surveys ◽  
3D Point Clouds ◽  
Vertical Displacements ◽  
Resolution Imaging ◽  
Post Disaster

AbstractSmall unmanned aerial vehicles have been seeing increased deployment in field surveys in recent years. Their portability, maneuverability, and high-resolution imaging are useful in mapping surface features that satellite- and plane-mounted imaging systems could not access. In this study, we develop and apply a workplan for implementing UAV surveys in post-disaster settings to optimize the flights for the needs of the scientific team and first responders. Three disasters caused by geophysical hazards and their associated surface deformation impacts were studied implementing this workplan and was optimized based on the target features and environmental conditions. An earthquake that caused lateral spreading and damaged houses and roads near riverine areas were observed in drone images to have lengths of up to 40 m and vertical displacements of 60 cm. Drone surveys captured 2D aerial raster images and 3D point clouds leading to the preservation of these features in soft-sedimentary ground which were found to be tilled over after only 3 months. The point cloud provided a stored 3D environment where further analysis of the mechanisms leading to these fissures is possible. In another earthquake-devastated locale, areas hypothesized to contain the suspected source fault zone necessitated low-altitude UAV imaging below the treeline capturing Riedel shears with centimetric accuracy that supported the existence of extensional surface deformation due to fault movement. In the aftermath of a phreatomagmatic eruption and the formation of sub-metric fissures in nearby towns, high-altitude flights allowed for the identification of the location and dominant NE–SW trend of these fissures suggesting horst-and-graben structures. The workplan implemented and refined during these deployments will prove useful in surveying other post-disaster settings around the world, optimizing data collection while minimizing risk to the drone and the drone operators.

3D Visual Technology of Geo-Deformation Disasters Induced by Mining Subsidence Based on ArcGIS Engine

2012 ◽  
Vol 500 ◽  
pp. 428-436 ◽  
Author(s):  
Ke Ming Yang ◽  
Jun Ting Ma ◽  
Bo Pang ◽  
Yi Bin Wang ◽  
Ran Wang ◽  
...  
Keyword(s):  
Coal Mining ◽  
Surface Deformation ◽  
Ground Deformation ◽  
Ground Surface ◽  
Horizontal Displacement ◽  
Mining Subsidence ◽  
Underground Coal Mining ◽  
Vertical Movements ◽  
Probability Integral Method ◽  
Arcgis Engine

Mining subsidence often produces significant horizontal and vertical movements at the ground surface, the surface deformation induced by underground coal mining can be predicted by probability integral method, and the surface geo-deformation disasters can be visualized based on GIS components. A three dimensional (3D) visualizing system of surface geo-deformation information is designed and developed with ArcGIS Engine and C# in the study. According to the surface deformation-predicted data induced by underground coal mining in Guobei Coalmine of Huaibei mine field, the extents and degrees of ground deformation disasters are visualized in 3D views for surface vertical subsidence, slope, curvature, horizontal displacement and horizontal strain based on the GIS-developed application platform.

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