Design Of Intelligent System For Overfilling Monitoring Of Cast-in-place Piles Based On Arduino And LabVIEW

Concrete cast-in-place pile is a construction method in the field of foundation treatment of civil engineering.In order to improve the bearing capacity of natural foundation,it is necessary to make vertical holes on the leveled ground,place reinforcement cages in holes,and finally pour concrete into piles.This method is widely used because of its advantages of simple construction technology,low cost and easy quality control.However,the traditional method can not effectively control the grouting height,resulting in the problem that the actual height of the pile exceeds the design height.After the foundation pit is excavated,the excess grouting must be removed.Over-irrigation will not only increase unnecessary material and labor,but also cause waste of natural resources.In the transformation of civil engineering industry from extensive to refined,this problem needs to be solved urgently.Therefore,through Arduino and LabVIEW platforms,this paper designs an intelligent monitoring system for over-grouting of cast-in-place piles.Based on the difference of resistivity between concrete and wall mud,the system achieves data acquisition and processing,sound and light alarm,and data remote transmission.It not only realizes the timely monitoring and control of over-filling of cast-in-place piles(issuing reliable instructions for stopping over-filling in construction operations),but also transmits construction information of each pile remotely for project managers,and realizes information management.In this paper,combined with the means of hardware development and software design,full-scale model test is used to simulate the pouring process of cast-in-place piles,and probe is set at the control elevation to realize the functions of data visualization and automatic preservation.By calibrating the initial resistance value of concrete and setting alarm parameters in software,when the concrete exceeds the set elevation,the system canautomatically control the hardware acoustooptic alarm.The hardware uses Arduino Mega 2560 as the core controller and connects with temperature sensor DS18B20 to realize the automatic collection of concrete temperature data;connects buzzer and light emitting secondary tube to realize sound and light alarm through software control;and connects ZigBee wireless module to realize wireless data transmission and reception.The software is developed and designed on LabVIEW platform.It connects with Arduino Mega 2560 serial port and resistance acquisition serial port through visa interface.The data are imported into waveform graph to realize real-time observation of concrete resistance.Add the automatic saving module,and save the data into excel format automatically,which is convenient for data processing and analysis after the experiment.