精密导向技术在地下工程中的应用

发布时间：2018-05-28 10:06

本文选题：联系三角形 + 精密导向　；参考：《大连海事大学》2014年硕士论文

【摘要】：本文选取南京地下过江工程,本工程通过顶管穿越长江两岸,要建一座市政排水工程,顶管工程要求精度高,对贯通误差有严格控制,要求横向贯通误差不大于25mm,整个工程长度800m。本文作者通过各类地下工程特点,相关施工要求及测图规范等,利用测量平差基础知识,对贯通误差建立了相应的测量平差数学模型。按中误差分配定律,结合施工现场条件,对贯通误差进行分解为地面控制误差、竖井传递误差、洞内贯通误差三部分。根据相应误差特点,采取有针对性的解决方案。利用平差模型对地面控制网优化,解算误差限值符合要求,并进行了精度分析,使误差量化。竖井定位测量采用联系三角形相应的平差数学模型进行优化,结算结果满足要求,并以陀螺经纬仪进行校核,两者互差很小,证明了定向的精准性。洞内导向则采用计算机结合测量机器人而形成的自动导向系统,并配以高精度的导线进行校核,经过误差精度分析,满足精度要求。同时对竖井高程传递也进行了详细分析,采取了对向观测,经过平差达到了精度要求。通过测量平差理论结合工程实践,能有效的解决复杂的精密工程测量问题,在地下工程中,顶管工程往往难以保证精度,测量条件限制较多,本文以测量平差理论为基础,对实际测量环境进行分析,对复杂贯通条进行分解,在逐一对分解后误差,采取针对性优化达到较高精度,则证明精密导向技术在地下工程中应用的可行性。
[Abstract]:In this paper, the Nanjing underground river crossing project is selected. The project passes through the banks of the Yangtze River through pipe jacking, and a municipal drainage project is to be built. The pipe jacking project requires high precision and strict control of the transmission error. The transversal error is not more than 25 mm and the whole project length is 800 m. Based on the characteristics of various underground projects, relevant construction requirements and surveying and mapping specifications, and using the basic knowledge of measurement adjustment, the author establishes the corresponding mathematical model of measurement adjustment for the transfixion error. According to the law of center error distribution and combined with the conditions of construction site, the penetrating error is decomposed into three parts: ground control error, shaft transmission error and hole through error. According to the characteristics of the corresponding error, a targeted solution is adopted. The adjustment model is used to optimize the ground control network. The calculation error limit value meets the requirements, and the accuracy analysis is carried out to quantify the error. The vertical shaft positioning measurement is optimized by the mathematical model of adjustment associated with triangle, the settlement results meet the requirements, and the gyrotheodolite is used to check. The difference between the two is very small, which proves the accuracy of orientation. On the other hand, the automatic guidance system formed by the computer combined with the measuring robot is used for the guidance in the tunnel, and the high precision conductor is used to check the system. Through the error precision analysis, the accuracy requirement is satisfied. At the same time, the shaft height transfer is analyzed in detail, and the directional observation is adopted, and the precision requirement is reached after adjustment. The measurement adjustment theory combined with engineering practice can effectively solve the complex problem of precision engineering measurement. In underground engineering, pipe jacking works are often difficult to ensure accuracy, and the measuring conditions are limited. This paper is based on the theory of measurement adjustment. By analyzing the actual measuring environment and decomposing the complicated through-through strip, the paper proves the feasibility of applying precision guidance technology in underground engineering by adopting targeted optimization to achieve higher precision after analyzing the error one by one.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU992.01

【共引文献】