Deep foundation pit concrete support wireless ultrasonic array sensor and monitoring method thereof

Abstract

The invention relates to a deep foundation pit concrete support wireless ultrasonic array sensor. The deep foundation pit concrete support wireless ultrasonic array sensor comprises a field monitoringterminal (1), a control terminal (2) and a first wireless communication module (3), wherein the field monitoring terminal comprises a power module, an ultrasonic sensor array (12) and a core electronic control module. The deep foundation pit concrete support wireless ultrasonic array sensor is designed to receive instruction and transmit data in a wireless mode and driven by solar energy, therebyovercoming the problems that traditional monitoring devices are large in size and data transmission of wired systems are vulnerable to deep foundation pit construction interference, high in cable laying and maintenance cost as well as wire laying workload, inconvenient during cable laying in special positions and difficult in field power taking and the like. Based on the principles of synthetic aperture focusing technique, a monitoring method matched with the deep foundation pit concrete support wireless ultrasonic array sensor is designed to perform effective nondestructive monitoring on deep foundation pit concrete materials and real-time wireless transmission on data, and accordingly can provide support for intelligent engineering monitoring and analyzing.

Description

technical field [0001] The invention relates to a deep foundation pit concrete support wireless ultrasonic array sensor and a monitoring method, belonging to the technical field of health monitoring of deep foundation pit concrete support structures. Background technique [0002] In recent years, with the rapid development of my country's national economy, accelerated urbanization process and urban expansion, civil engineering structures have developed to high altitude and underground. The construction of super high-rise buildings and the development of underground space have made the foundation pit engineering develop deeper and larger into a trend. Concrete material has the characteristics of low cost, convenient construction, small deformation, etc., and is widely used in deep foundation pit support. However, due to unfavorable factors such as complex engineering geology and hydrogeological conditions around the foundation pit, failure accidents of support structures occ...

AI Technical Summary

Problems solved by technology

[0003] The monitoring of concrete supports in deep foundation pits is an indispensable and important part of foundation pit construction. However, the incidence of concrete support collapse accidents in deep foundation pit engineering construction is still relatively high

There are two main reasons why the monitoring measures cannot be effectively warned: First, according to the current national, industry and local foundation pit monitoring technical specifications at various levels (GB50497-2009, JGJ 120-2012 and 2010) most of the monitoring carried out by wired data transmission, there are problems such as high cost of cable laying, heavy wiring workload, inconvenient wiring in special parts, maintenance consumes more manpower and material resources, and data transmission is easily affected by construction; secondly, based on The monitoring method of concrete support for deep foundation pits with macroscopic characteristics such as displacement and axial force has certain limitations. At present, the monitoring data in the project has relatively large fluctuations objectively, which makes it difficult to choose a reasonable monitoring data threshold as a reliable early warning indicator.

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