Research On Soft Ground Testing And Pile Machine Construction Monitoring Technology Based On Soil Network

Soft soil is widely distributed in coastal areas of my country,and the structural stability of the soil is poor,so it is necessary to strengthen the soft soil foundation.Cement mixing pile is a common cost-effective reinforcement method.The quality of its construction directly determines the safety of the entire construction,and the construction parameters are directly related to the construction quality of the cement mixing pile.Therefore,the determination and monitoring of construction parameters of soft soil foundation is the key to ensure the quality of pile formation.At present,the construction parameters are mainly determined by laboratory proportioning and pile testing at the construction site.This method needs a lot of manpower and material resources,and most of the determined construction parameters are larger than the actual values,which wastes construction materials and reduces construction efficiency.CPTU(Piezocone Penetration Test)is a fast and accurate soil test method that can accurately measure soil parameters and has less damage to the original foundation structure.The CPTU soil parameter testing process and the pile foundation construction process are combined to form a soil networking system.The soil parameters measured by CPTU are fully utilized to determine the construction parameters of the pile machine.Compared with the traditional parameter determination method,it is accuracy and easy to use.Real-time construction parameters can be monitored remotely to ensure construction quality.Therefore,it is very important to design a soil layer testing and pile machine construction monitoring system based on the soil network.The main work of paper is as follows:(1)Designed the overall structure including CPTU soil layer test,pile machine construction monitoring and soil networking test system.The conventional construction process of cement mixing piles and the determination method of construction process parameters are analyzed,and the method of determining geological stratification by CPTU test is studied.Designed a three-part test system for soil networking including data acquisition terminal,data receiving server and Web server.This system architecture solves the monitoring and determination of the construction parameters of the pile driver,saves the construction materials,improves the construction efficiency,and ensures the construction quality.(2)The soil classification method based on CPTU data and its three-dimensional display are studied.Use the Chinese practical soil classification method based on CPTU data to classify single-hole soil.The advantages and disadvantages of inverse distance interpolation method and Kriging interpolation method in constructing the effect of three-dimensional surface are compared and analyzed.Finally,Three.js,a kind of third-party library,based on WebGL is used to display the boundary surface of the soil layer on the Web page.(3)Designed a fuzzy controller to determine the construction process parameters.The factors affecting the quality of cement mixing piles are analyzed.The geological stratification,water content,plasticity index and depth are selected as the input of the fuzzy controller,and the cement mixing amount,drilling speed,stirring speed and spraying pressure are used as the output to construct a multi-input and multi-output fuzzy controller.In order to decouple the multi-input multi-output fuzzy controller,a multi-variable hierarchical fuzzy control idea is adopted.A large fuzzy controller is divided into multiple dual-input single-output fuzzy controllers to simplify the fuzzy relationship.Through practical cases,the reliability of the fuzzy controller is verified.(4)Build a test system for the soil network.The test system includes three parts: data acquisition terminal,data receiving server and Web server.In the data collection terminal,the remote transmission unit DTU sends the data collected by the sensor to the data receiving server.For a large number of data collection terminals transmitting data at the same time,a high concurrent data receiving server based on Netty and Kafka is designed.Netty is responsible for polling the terminal port Receiving data,Kafka uses the queue message mode to distribute the pending messages to multiple consumer programs,which completes the decoupling of data collection and processing and improves the concurrent performance of the server.The Web server is built based on the frameworks of Spring,Spring MVC,and Mybatis,and implements basic data statistics and query functions.Based on Web Socket,it implements remote data monitoring functions on the Web side,which is convenient for users to manage and monitor construction projects.