scholarly journals Real time monitoring of soil moisture content for landslide early warning: wn experimental study

2018 ◽  
Vol 192 ◽  
pp. 02032
Author(s):  
Panupong Thumtuan ◽  
Tanan Chub-Uppakarn ◽  
Tanit Chalermyanont
Keyword(s):  
Experimental Study ◽  
Water Content ◽  
Real Time ◽  
Time Domain ◽  
Early Warning ◽  
Soil Moisture Content ◽  
Soil Slope ◽  
Real Time Monitoring ◽  
Landslide Early Warning ◽  
Vertical Spacing

Landslides occur commonly after heavy rainfall. More accurate and immediate prediction of landslides for early warning purpose can be achieved when real time water content of the soil slope is known. In this experimental study, the water content was measured using time domain reflectometers (TDR). Five TDRs were installed with equal vertical spacing in a test pit. The measured results were sent to and stored on a web server and real time monitoring was made online. All TDRs results showed a good and accurate water content response of the soil to the rainfall from top to the bottom of the test pit.

A Reliability-Based Early Warning System for Real-Time Monitoring on RC Buildings

2012 ◽  
Vol 446-449 ◽  
pp. 3422-3427
Author(s):  
Wang Sheng Liu ◽  
Ming Zhao
Keyword(s):  
Probability Distribution ◽  
Real Time ◽  
Early Warning ◽  
Early Warning System ◽  
Limit State ◽  
Warning System ◽  
State Function ◽  
Real Time Monitoring ◽  
Rc Buildings ◽  
Load Effect

Today there is an urgent need for effective monitoring whether for old buildings or new ones. While conventional early warning system for real-time monitoring is based on safety factor, this paper proposes a new reliability-based framework to monitor the safety of RC buildings probabilistically. The framework includes modeling resistance, predicting probability distribution of load effect, calculating reliability and setting reliability index threshold. The in-situ test data enables to update the resistance model through a Bayesian process. Meanwhile, the observed monitoring data predicts the probability distribution of load effect. FORM is used to calculate the reliability because the limit state function for real-time monitoring is linear and simple. This study shows that the reliability-based early warning system is of more scientific sense in quantifying the safety and may be applied to many engineering fields.

Laboratory Experiment Study on Real-Time Monitoring and Safety Early Warning System of Structure Settlement and Deformation

2015 ◽  
Vol 775 ◽  
pp. 264-267
Author(s):  
Xiao Dong Pan ◽  
Lei Zhao
Keyword(s):  
Real Time ◽  
Early Warning ◽  
Early Warning Systems ◽  
Transport Layer ◽  
Measuring Instruments ◽  
Test Scheme ◽  
Static Force ◽  
Force Level ◽  
Real Time Monitoring ◽  
Time Deformation

Currently the settlement and deformation of factory building structure is monitored using total stations and other more conventional measuring instruments, it is difficult to reflect the health of the structure timely and accurately. In order to change the situation, we establish a set of system for real-time monitoring of deformation and safety warning. The system is formed of sensing layer, transport layer and application layer. Sensing layer is composed of static force level and biaxial inclinometer. The system can be used in dynamic real-time factory structure safety monitoring, also applied to other similar structural monitoring. This paper will study the system components and principle, early warning systems grading, calculation of real-time deformation of roof frame, laboratory test scheme and verification. Experiments showed that the system is suitable for the actual factory structure monitoring, while the choice of static force level and biaxial inclinometer of precision to meet the requirements.

A Wireless, Passive Embedded Sensor for Real-Time Monitoring of Water Content in Civil Engineering Materials

2008 ◽  
Vol 8 (12) ◽  
pp. 2053-2058 ◽  
Author(s):  
Justin B. Ong ◽  
Zhanping You ◽  
Julian Mills-Beale ◽  
Ee Lim Tan ◽  
Brandon D. Pereles ◽  
...  
Keyword(s):  
Water Content ◽  
Real Time ◽  
Civil Engineering ◽  
Real Time Monitoring ◽  
Engineering Materials
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