The tunnel deformation data includes the overall sedimentation,offset data and section deformation data.A math modal about the amalgamation of offset data according to the monitoring system is built.Using the math model,the effective amalgamation of offset data is made.The data after calculating can reflect the condition of the tunnel intuitive and exactly.Meanwhile,the modal has universality and can be used by analysis of the similar pipeline or tunnel.

Using the deformation monitoring system based on digital image sensor,the relative displacement of the object can be gotten directly.Through the transformations of criterion coordinate,the absolute coordinates of the object can be gotten finally.And there are error diffusion and accumulation during transformation.The single scanning's reliable points under error propagation conditions are calculated by establishing a mathematical model,and the method of increasing the reliable points in accordance with the actual situation of Shanghai subway tunnel is proposed.

The deformation of operating subway tunnel includes the displacement of the tunnel longitudinal axis line along the crosssection and the changes of tunnel cross-sectional shape. However, the security of subway operation should be affected if the deformation of tunnel is too large. A deformation detection system has been given in this article, which is made based on the image sensors and tunnel deformation detecting devices. And the deformation detection could be perfectly accomplished owing to its high degree of automation and good repeatability. But actually the amounts of data collected are so large that some mistakes can not be avoided in the process of transmission. Here data collected could be transmitted in security by making reasonable concise communication protocols and compiling effective communication programs, which provides reliable basic data to right monitoring results. The data communication between the host computer and the slave computer is basically achieved. The functions of accounting and saving and collecting and receiving of data also carry out. The program is compact and the received data is credible. The stability of the program meet the requirement of the system. The basic data can be provided for the host computer. According to the data, it can be trust to the intuitionistic data for the information issuance. The data can be provided for forecasting correctly the condition of the subway tunnel.

In order to precautiously forecast frontal geological conditions using Ground Penetrating Radar (GPR) and thereafter avoid construction risks during shielded tunneling,it is extremely critical to select proper central frequency and geological data gathering parameters of GPRs so as to improve data reliability and feasibility.To meet shielded construction requirements,the major impacts on central frequency selection for GPR antennas are analyzed.For this purpose,the central frequency selection should satisfy the demands on not only detection depth and resolution,but also the installation onto shielded tunneling machines.In so doing,the basic principles and skills are summarized on the parameter setting for geological data gathering during precautious forecasting.In addition,the correlations among A/D sampling bites,number of sampling points and scanning speeds are pinpointed.

为了使大型起重船舶锚泊系统在浅海作业时可靠、高效、高质量地运行,对锚泊控制系统的设计研究就变得非常重要。本文分析了大型船舶锚泊控制系统的功能需求,比较了锚绞车系统的液压驱动和电力驱动方式,设计了控制系统的基本组成,采用先进的变频调速控制技术,构建了基于Profibus-DP现场总线的冗余双光纤环网,并将其应用于施工实践。结果表明该系统运行稳定可靠,自动化程度高,实时性好,控制效果理想,使用方便。