Analysis on Effectiveness of Landslide Control Based on Internal Force Monitoring of Anti-Slide Piles

2010 ◽  
Vol 163-167 ◽  
pp. 1274-1280
Author(s):  
Qing Lu Deng ◽  
Da Peng Zhu
Keyword(s):  
Stable State ◽  
Internal Force ◽  
Gas Pipeline ◽  
Landslide Risk ◽  
Control Effectiveness ◽  
Landslide Mass ◽  
Force Monitoring ◽  
Engineering Significance ◽  
And Control ◽  
Pipeline Safety

Landslide, rock falling, river erosion are the serious geological disasters that make effect on Zhongxian-Wuhan gas pipeline safety, and the landslide is the most outstanding disasters among them, and anti-slide pile was often used to reinforce landslide mass. However, computation and design of anti-slide pile approximation in actual`dge issues that worth further studying. Irrational design of anti-slide pile can result in landslide risk still exist, landslide is still possible to failed, and conservative design although eliminate landslide risk, and at same time it causes waste of money. So it has important theoretical and engineering significance to verify the accuracy of the design and assess control effectiveness of landslide based on internal force monitoring of anti-slide pile. Based on axial force monitoring main reinforcement inner anti-slide pile, this paper gets the factual moment variation of anti-slide pile of Shunxi No.1 at different times, and compared factual moment with theory moment calculated by the commonest M method. The result showed that the theory measurement calculated by M method is much more then factual moment, so it is safe to compute internal force of piles by M method. Currently, it indicates that the landslide after treatment is under a stable state because of less stress acting on the pile, and the main threat to the gas pipeline will vanished, and the expected control aim is achieved. It has great reference for internal force design of anti-slide pile retaining structure and control effectiveness evaluation.

scholarly journals Analysis of the existing legal, regulatory and technical support for the prevention of environmental emergencies at gas pipeline facilities in Uzbekistan

2021 ◽  
Vol 937 (2) ◽  
pp. 022025
Author(s):  
S Khodjaeva ◽  
M Musaev ◽  
Sh Akhmedov
Keyword(s):  
Mechanical Damage ◽  
Corrosion Damage ◽  
Gas Pipeline ◽  
Safety Concept ◽  
Diagnostics And Control ◽  
Emergency Situations ◽  
Operational Diagnostics ◽  
And Control ◽  
Pipeline Safety

Abstract Operation of new and existing pipeline systems is carried out in accordance with the relevant instructions, with technical inspections, diagnostics and control carried out, if necessary. In accordance with the pipeline safety concept being developed, the possibility of operational diagnostics of the occurrence and development of emergency situations should be provided. Analysis of data for the last years of gas pipeline operation indicates the occurrence of various environmental emergency situations. Therefore, the task of this study is to classify the factors of accidents and damage to gas pipelines with the determination of the main share of the most significant. The proportion of emergencies due to mechanical damage to pipes by machines and mechanisms during excavation has maximum values. This indicates that during this period of time, many violations of technological regulations were registered. With regard to emergencies due to corrosion damage, there is some stability. As can be evidenced in this research paper, mainly accidents, repairs and leaks occur in summer - winter periods.

LANDSLIDE RISK MANAGEMENT IN THE COASTAL ZONE OF THE KUIBYSHEV RESERVOIR DUE THE DESIGN OF HIGH-SPEED LINE "MOSCOW-KAZAN"

2017 ◽  
Author(s):  
Nikolai Petrov ◽  
Nikolai Petrov ◽  
Inna Nikonorova ◽  
Inna Nikonorova ◽  
Vladimir Mashin ◽  
...  
Keyword(s):  
High Speed ◽  
Computational Models ◽  
Stable State ◽  
Landslide Risk ◽  
Kuibyshev Reservoir ◽  
Stepped Surface ◽  
The Stability ◽  
Landslide Slope ◽  
The Village

High-speed railway "Moscow-Kazan" by the draft crosses the Volga (Kuibyshev reservoir) in Chuvashia region 500 m below the village of New Kushnikovo. The crossing plot is a right-bank landslide slope with a stepped surface. Its height is 80 m; the slope steepness -15-16o. The authors should assess the risk of landslides and recommend anti-landslide measures to ensure the safety of the future bridge. For this landslide factors have been analyzed, slope stability assessment has been performed and recommendations have been suggested. The role of the following factors have been analyzed: 1) hydrologic - erosion and abrasion reservoir and runoff role; 2) lithologyc (the presence of Urzhum and Northern Dvina horizons of plastically deformable rocks, displacement areas); 3) hydrogeological (the role of perched, ground and interstratal water); 4) geomorphological (presence of the elemental composition of sliding systems and their structure in the relief); 5) exogeodynamic (cycles and stages of landslide systems development, mechanisms and relationship between landslide tiers of different generations and blocks contained in tiers). As a result 6-7 computational models at each of the three engineering-geological sections were made. The stability was evaluated by the method “of the leaning slope”. It is proved that the slope is in a very stable state and requires the following measures: 1) unloading (truncation) of active heads blocks of landslide tiers) and the edge of the plateau, 2) regulation of the surface and groundwater flow, 3) concrete dam, if necessary.

Evaluating Risk and Natural Gas Pipeline Safety

2017 ◽  
Vol 45 (4) ◽  
pp. 657-680 ◽  
Author(s):  
Michael James Brogan
Keyword(s):  
Natural Gas ◽  
Gas Pipeline ◽  
Natural Gas Pipeline ◽  
Pipeline Safety

scholarly journals Mass transport of contaminated soil released into surface water by landslides (Göta River, SW Sweden)

2012 ◽  
Vol 16 (7) ◽  
pp. 1879-1893 ◽  
Author(s):  
G. Göransson ◽  
M. Larson ◽  
D. Bendz ◽  
M. Åkesson
Keyword(s):  
Surface Water ◽  
Contaminated Soil ◽  
Suspended Particle ◽  
Transport Processes ◽  
Landslide Risk ◽  
Suspended Sediment Transport ◽  
River Stretch ◽  
Landslide Mass ◽  
Exposure Pathway ◽  
The Impact

Abstract. Landslides of contaminated soil into surface water represent an overlooked exposure pathway that has not been addressed properly in existing risk analysis for landslide hazard, contaminated land, or river basin management. A landslide of contaminated soil into surface water implies an instantaneous exposure of the water to the soil, dramatically changing the prerequisites for the mobilisation and transport of pollutants. In this study, an analytical approach is taken to simulate the transport of suspended matter released in connection with landslides into rivers. Different analytical solutions to the advection-dispersion equation (ADE) were tested against the measured data from the shallow rotational, retrogressive landslide in clayey sediments that took place in 1993 on the Göta River, SW Sweden. The landslide encompassed three distinct events, namely an initial submerged slide, followed by a main slide, and a retrogressive slide. These slides generated three distinct and non-Gaussian peaks in the online turbidity recordings at the freshwater intake downstream the slide area. To our knowledge, this registration of the impact on a river of the sediment release from a landslide is one of few of its kind in the world and unique for Sweden. Considering the low frequency of such events, the data from this landslide are highly useful for evaluating how appropriate the ADE is to describe the effects of landslides into surface water. The results yielded realistic predictions of the measured variation in suspended particle matter (SPM) concentration, after proper calibration. For the three individual slides it was estimated that a total of about 0.6% of the total landslide mass went into suspension and was transported downstream. This release corresponds to about 1 to 2% of the annual suspended sediment transport for that river stretch. The studied landslide partly involved an industrial area, and by applying the analytical solution to estimate the transport of metals in the sediments, it was found that landslides may release a significant amount of pollutants if large contaminated areas are involved. However, further studies are needed to develop more detailed descriptions of the transport processes. There is also a need to increase the knowledge on possible environmental consequences in the near and far field, in a short- and long-time perspective. In summary, the release of pollutants should not be neglected in landslide risk assessments.

Development of an Ontology for an Industrial Domain

2011 ◽  
pp. 277-291 ◽  
Author(s):  
Christine W. Chan
Keyword(s):  
Natural Gas ◽  
Software Agents ◽  
Gas Pipeline ◽  
Monitoring And Control ◽  
Knowledge Modeling ◽  
Ontology Construction ◽  
Natural Gas Pipeline ◽  
Knowledge Based ◽  
Application Ontology ◽  
And Control

This chapter presents a method for ontology construction and its application in developing ontology in the domain of natural gas pipeline operations. Both the method as well as the application ontology developed, contribute to the infrastructure of Semantic Web that provides semantic foundation for supporting information processing by autonomous software agents. This chapter presents the processes of knowledge acquisition and ontology construction for developing a knowledge-based decision support system for monitoring and control of natural gas pipeline operations. Knowledge on the problem domain was acquired and analyzed using the Inferential Modeling Technique, then the analyzed knowledge was organized into an application ontology and represented in the Knowledge Modeling System. Since ontology is an explicit specification of a conceptualization that provides a comprehensive foundation specification of knowledge in a domain, it provides semantic clarifications for autonomous software agents that process information on the Internet.

Control of Static Shape, Dynamic Oscillation, and Thermally Induced Vibration of Nozzles

2005 ◽  
Vol 128 (3) ◽  
pp. 357-363 ◽  
Author(s):  
D. W. Wang ◽  
H. S. Tzou ◽  
S. M. Arnold ◽  
H.-J. Lee
Keyword(s):  
Finite Element ◽  
Conical Shell ◽  
Shape Control ◽  
Numerical Data ◽  
Analysis Data ◽  
Mode Shapes ◽  
Thermal Excitation ◽  
Thermally Induced ◽  
Control Effectiveness ◽  
And Control

Static shape actuation and dynamic control of nozzles can improve their performance, accuracy, reliability, etc. A new curved laminated piezothermoelastic hexahedral finite element is formulated based on the layerwise constant shear angle theory and it is used for modeling and analysis of piezothermoelastic conical shell structures subjected to control voltages for static shape actuation and dynamically and thermally induced vibration controls. Free vibration characteristics of an elastic truncated conical shell nozzle with fixed-free boundary conditions are studied using the new finite element. Both frequencies and mode shapes are accurately computed and compared favorably with available experimental and other numerical data. This study is then extended to evaluate control effectiveness of the conical shell with laminated piezoelectric layers. Static shape control is achieved by an applied electric potential. Vibration sensing and control are carried out using the negative velocity control scheme. Control of thermal excitation is also investigated. Analysis data suggest that the dynamic behavior and control characteristics of conical shells are quite complicated due to the coupled membrane and bending effects participating in the responses. To improve control effectiveness, segmentation and/or shaping of sensor and actuator layers need to be further investigated.

Design and Implementation of the Airborne Laser Effector for Autonomous Pipeline Alignment

2014 ◽  
Vol 496-500 ◽  
pp. 1327-1332
Author(s):  
Hai Fang Liu ◽  
Rui Wang ◽  
Shi Sheng Zhong
Keyword(s):  
Natural Gas ◽  
Control Algorithm ◽  
Gas Pipeline ◽  
Remote Detection ◽  
Long Distance ◽  
Natural Gas Pipeline ◽  
Modular Software ◽  
Airborne Laser ◽  
Design Requirements ◽  
And Control

Abstract. High-accuracy beam pointing is one of the key problems in the airborne laser remote sensing of natural gas pipeline leak. In response to the domestic demand for the long-distance natural pipeline leak detection, this study proposes an airborne laser effector for autonomous pipeline alignment based on CH4/H2S detector. Mainly structured on 2DOF serial mechanism, the device under discussion is designed with a control system operated on IPC and PMAC, followed by the design of hierarchical modular software. Once completed, the device is placed for indoors pointing experiments as well as simulated airborne test. The results show the effector can conduct full-angle scan of the pod area, achieve a static measuring precision of less than 0.4m as an alignment point is about 100 meters from the laser and detect leakage in dynamic simulated experiment, which meets with the design requirements. In other words, both the design and control algorithm are proved to be feasible. The effector holds an important engineering value for solving the problem of remote detection of the natural gas pipeline leakage.

scholarly journals Preliminary Discussion on Monitoring of Steel Support Axis Force in Metro Engineering

2019 ◽  
Vol 136 ◽  
pp. 04045
Author(s):  
Yiteng Xu ◽  
Feng Xu ◽  
Peirong Deng ◽  
Bin Li ◽  
Zhifa Yu ◽  
...  
Keyword(s):  
Axial Force ◽  
Warning System ◽  
Safety Monitoring ◽  
Control Measures ◽  
Foundation Pit ◽  
Depth Analysis ◽  
Force Monitoring ◽  
And Control ◽  
Monitoring Behavior ◽  
Irregular Behavior

Axial force monitoring of steel support is one of the important factors for foundation pit safety monitoring. In the monitoring of steel support, there are many problems, such as unreasonable installation of axonometer, irregular monitoring behavior of axonometer, incomplete analysis of axial force and imperfect early warning system. Collecting many engineering cases, and in-depth analysis and research on the problems and irregular behavior of steel support axial force monitoring in every link. The influencing factors and control measures of steel support axial force are discussed in detail, and some useful conclusions are obtained. It has been applied in the actual monitoring work and achieved good results. It is of great significance to guide subway safety construction and promote the development of axle force monitoring industry.

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