Strain Monitoring of Widening Cement Concrete Pavement Subjected to Differential Settlement of Foundation

Weng, Xiaolin; Nie, Yongtao; Lu, Junyuan

doi:10.1155/2015/679549

Cited by 11 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Roveri et al [28] presented the results of a field trial with a FBG sensor array system for the realtime monitoring of railway traffic and for the SHM of both the railway track and train wheels. Weng et al [29][30][31] developed a FBG-based sensor network to monitor the strain distributions in the pavement structure, axial stress of tunnel anchor, and foundation settlement; moreover, the centrifugal model test was performed with an improved packaging and installation method for the quasi-distributed sensor system. In view of the aforementioned studies, in situ monitoring through installation of sensors is a widely used method for the investigation into the mechanical properties and strain changes of tunnel liner with better accuracy and reliability [32].…”

Section: Introductionmentioning

confidence: 99%

Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel

et al. 2016

View full text Add to dashboard Cite

Compared with electrical strain gauges, fiber Bragg grating (FBG) sensing technology is a relatively novel method for tunnel structural health monitoring, which has a number of advantages including high accuracy, multiplexing, electromagnetic interference resistance, and good repeatability. In order to study the internal force of the tunnel liner and detect the potential safety hazards, series of strain monitoring tests of a loess tunnel, taking into account the complex stress and strain variation of the loess during tunnelling, were performed by employing the tandem linear FBG sensor arrays controlled by the wavelength division multiplexing (WDM) technology. The concrete strain has obvious linear characteristics over time in the early stage and then gradually tends to a stable value. Moreover, after the necessary temperature compensation, loess tunnel structure safety was assessed through the analysis of real-time strain and internal force of the liner concrete, and the FBG monitoring data and safety assessment results indicate that the safety factors of various liner sections all meet the code requirements, which verify the safety and stability of the tunnel liner structure. The FBG sensors-based in situ monitoring technology can be well applied in the loess tunnel structure safety assessment.

show abstract

Section: Introductionmentioning

confidence: 99%

Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel

et al. 2016

View full text Add to dashboard Cite

show abstract

“…As such, the above methods do not meet the measurement accuracy requirements for mechanical engineering applications. To meet these requirements, Wang et al used fiber-grating sensors to detect uneven settlement of concrete foundations 73 (Figure 17). Similarly, Zhu 74 installed fiber grating monitoring sensors in foundations, to form a quasi-distributed ground-foundation health monitoring system, and was able to successfully monitor the foundation remotely.…”

Section: Research On Quality Inspection Of Foundationsmentioning

confidence: 99%

Systematic review of research relating to heavy-duty machine tool foundation systems

Tian

Liu

et al. 2019

Advances in Mechanical Engineering

View full text Add to dashboard Cite

The quality of heavy-duty machine tool foundations can drastically affect the operating life and working precision of the tool, and the high cost of manufacture has drawn a lot of attention. This article summarized the research status of the relevant literature on the characteristics, vibration isolation, foundation optimization, and quality inspection of heavyduty machine tool-foundation system, induced the influencing laws of the influencing factors of the system, reviewed the highlights and achievements in the research of heavy machine tool-foundation system at present, and put forward some problems and development directions existing in the research of heavy machine tool-foundation system. It lays a foundation for realizing the judgment of the concrete foundation quality and improving the processing precision and the maintenance of the heavy machine tool.

show abstract

“…During the highway construction, engineer often uses pile foundation to stiffen permafrost structure, so as to increase the bearing capacity of subgrade (Khrenov, 2016;Crowther, 2015). As a kind of important pile foundation, cement fly ash gravel (CFG) pile composite is widely applied in the treatment for permafrost foundation owing to the following advantages: little heat radiation, excellent freeze thawing resistance, large lifting amplitude of bearing capacity, simple construction, short construction period and low cost (Zhou and Li, 2010;Song et al, 2015;Weng et al, 2015;Yu et al, 2017;Lai et al, 2016) Foundation Institute of China Academy of Building Research developed CFG pile composite foundation in the early 1990s (Zhao et al, 2008), which greatly facilitated the development of composite foundation theory and design method. CFG pile is high bond strength pile formed by cement, fly ash, gravel, aggregate chips, sand, and a moderate amount of water, together with soil between piles and cushion to form composite foundation.…”

Section: Introductionmentioning

confidence: 99%

Temperature analysis of CFG pile composite foundation in high latitudes and low altitude island permafrost

Liu

Yang

2019

IJSI

View full text Add to dashboard Cite

Purpose Cement fly ash gravel (CFG) pile composite foundation is an effective and economic foundation treatment approach, which is significant to build foundation, subgrade construction, and so forth. The purpose of this paper is to present a research on the temperature behaviours of high-latitude and low-altitude island permafrost under CFG pile composite foundation treatment. Design/methodology/approach In the process of CFG pile construction, the temperature of permafrost and pile body was monitored using the temperature sensors. The influence of subgrade height and atmospheric temperature cycle on permafrost temperature was analysed by finite element simulation. Findings In the process of CFG pile construction, the change curve of pile temperature and the temperature of permafrost beside pile following time can be divided into six stages, and the duration of these stages is at least one month. The temperature variation of permafrost while constructing subgrade in FEM has a good agreement with the results of field temperature monitoring. The height of subgrade not only affects the maximum temperature increase of permafrost and the re-frozen time of permafrost after the construction of CFG pile composite foundation, but also affects the temperature variation amplitude of permafrost during atmospheric temperature cycle. Originality/value The research will provide a reference for the design on the CFG pile composite foundation used for island permafrost and guarantee the stability of the structure; thus, it has an important significance.

show abstract

Strain Monitoring of Widening Cement Concrete Pavement Subjected to Differential Settlement of Foundation

Cited by 11 publications

References 10 publications

Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel

Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel

Systematic review of research relating to heavy-duty machine tool foundation systems

Temperature analysis of CFG pile composite foundation in high latitudes and low altitude island permafrost

Contact Info

Product

Resources

About