Research on horizontal displacement monitoring method of deep foundation pit based on laser projecting sensing technology

Peng Liu; Shulin Xie; Lixiao Zhang; Guangyi Zhou; Xuefeng Zhao

doi:10.1117/12.2296529

27 March 2018 Research on horizontal displacement monitoring method of deep foundation pit based on laser projecting sensing technology

Peng Liu, Shulin Xie, Lixiao Zhang, Guangyi Zhou, Xuefeng Zhao

Author Affiliations +

Proceedings Volume 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII; 1059928 (2018) https://doi.org/10.1117/12.2296529
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States

Abstract

A certain level of horizontal displacement will occur during excavation or subsequent construction of deep foundation pit. If the support is improper and the horizontal displacement of the foundation pit is too large, it will cause collapse and even affect the buildings around the foundation pit, which will endanger people's life and property. Therefore, the horizontal displacement monitoring of deep foundation pit becomes more and more important. At present, the electronic total station is often used to monitor the horizontal displacement of the foundation pit, but this monitoring method is expensive, prone to accidental errors, and can not be used for real-time monitoring. Therefore, a method of monitoring the horizontal displacement of deep foundation pit by using laser projection sensing technique is proposed in this paper. The horizontal displacement of the foundation pit is replaced by the displacement of the laser spot emitted by the laser, and the horizontal displacement of the foundation pit can be obtained by identifying the displacement of the laser spot projected on the screen. A series of experiments show that the accuracy of this monitoring method meets the engineering requirements and greatly reduces the cost, which provides a new technology for the displacement monitoring of deep foundation pit.

Citation Download Citation

Peng Liu, Shulin Xie, Lixiao Zhang, Guangyi Zhou, and Xuefeng Zhao "Research on horizontal displacement monitoring method of deep foundation pit based on laser projecting sensing technology", Proc. SPIE 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII, 1059928 (27 March 2018); https://doi.org/10.1117/12.2296529

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KEYWORDS

Laser applications

Sensors

Cameras

Transmitters

Buildings

Laser development

Image processing

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