The Development And Research Of A New Intelligent Grouting And Pressurized Water Detection System

At present, with underground project enlarged and the water conservancy project prospered, grouting technology has been widely used at home and abroad. However, the development of this technology is un-mature now,which is directly iMPacted by automation detecting degree of grouting construction parameters,due to grouting engineering belonging to hidden project, and the cases of theory falling behind practice. Under the influence of modern electronic technologies fibre-optic communication technology and going digital, the traditional grouting technology is developping towards the direction of intelligence,digital. By theoretical analysis, summarizing, design and experiments,a new intelligent grouting and pressurized water detection system is presented that can ensure the authenticity and validity of data and has a wide application prospect. This paper is mainly involved in the following research achievements:Firstly,this thesis analyzes that how to build the main frame of the system and the systems model. In the project, high pressure gum type oil-water isolator is successfully made, and fatal problems that transistor would be eroded when cement grout directly touching were solved to the root.Secondly, disadvantages of Lugeon test are summarized:â‘ The average porosity of 5-meter can not explain how many and how crannies are in the drill hole. There may be the same Lu Numbers in the two parts which is with little but wide canny and with many but narrow.â‘¡Results shows that permeability and grouting quantity of relevance is not significant due to the different physical behaviors from grout and water. In the new department of differential pressurized water testing, the seepage spots of dam can be accurately located and grouting quantity can be measured. The results of the study indicated that the calculating value of water flux by using Lugeon test is very far from by using differential revolution.And then according to analysing the rule of heterotaxis and the relation between grouting pressure and heterotaxis,the design and development of displacement sensor with grating technology is succeseful. Based on researches about analyzing and coMParing the working theories, advantages and disadvantages of current displacement equipments, the thesis demonstrates the superiority of grid-capacitance type such as simple structure, high-reliability,high-precision and automatic succession measure.Lastly, Input and Output interface circuits are introduced, including the printer interface, display interface,keyboard interface and analog signal input interface. This paper introduces the establishment of the hierarchical model in the software system. It analyzes the design of replacing thermal printer with 24 pin microprinter and how to print curves with assembly language. In order to enhance the dependability and reduce Electromagnetic Interference (EMI), two types signal isolators were successfully made in succession:transformer-coupling isolation and photoelectric-coupling isolation. It is found that strong electric-magnetic interference and interaction effect of many transistors transmission channels are effectively restrained and higher controlling accuracy and stability are possessed by photoelectric-coupling isolation.It is an innovation point that the fiber is used in analog signal transmission of grouting testing process. Based on the traditional transmission models, several fiber optic signal transmission solutions are coMPared. The fiber transmission systems is developped which is involved in Voltage-Frequency converter, electro-optical transformation and can process photoelectric signals. The system is powerful in function,simple on structure, reliable on work. Experiments proved that predicted and measured values were in good agreement. Relative error for predicted data (input voltage:2mV-5V) was less than 5%.In the new intelligent grouting and pressurized water detection system, four parameters can be deteceted on-line which are flow of water, pressure, density of cement grout (water cement ratio), and heterotaxis. And according to the actual situation, the macro Lugeon test and differential pressurized water test are choosed to detect the permeability in the system, which is a breakthrough in the field of grouting detection.