【作者】 王维朋；

【导师】 漆泰岳；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2008， 硕士

【摘要】 随着我国高速铁路、高速公路、海底隧道工程的建设,地质灾害一直都是威胁隧道与地下工程施工安全的主要灾害。在这些地质灾害中,地下水是影响隧道修建速度和威胁工程施工安全最主要因素之一,如:岩溶溶洞、暗河、岩溶陷落柱、岩溶淤泥带和富水断层破碎带等不良地质结构体,都会给隧道与地下工程的修建和运营带来困难和危害。显然,要避免这些地质灾害的发生,隧道地质灾害超前预报就显得尤为重要。目前,超前地质预报的方法不少,这些方法在应用中各有所长。但是在施工中,探测掌子面前方的水体病害方面,尚是一个待攻克的难题。瞬变电磁法是对充水充泥的不良地质体进行超前地质预报的新方法。瞬变电磁法对低阻充水断层、充泥充水溶洞、充水充泥破碎带等不良地质体反应灵敏。本文应用有限元软件ANSYS,采用数值模拟的方法对瞬变电磁法超前地质预报进行了数值模拟分析。从影响瞬变电磁法超前地质预报的响应异常入手,对两类形态的低阻不良地质体的数值模型进行了深入的研究;分析研究了影响地质体响应异常的影响因素及响应异常随影响因素的变化规律;通过数值模拟对地质体数值模型的瞬变电磁响应的多因素分析,对影响因素的敏感度进行了研究。更多还原

【Abstract】 With the construction of high speed railway, highway and submarine tunnel, geologic disaster always plays the main part of influencing construction and operation safe of tunnel and underground engineering, among this geologic disaster, underground water is one of the main factors, for example, karst cave, underground river, karst sink hole, karst muddy belts, water-saturated fracture zone and so on, all this can bring on difficulty and harm to construction and operation of tunnel and underground engineering. By all appearance, tunnel geological hazard forecasting plays an important part in avoiding these geological hazards. Presently, there are many method used in the field of tunnel geological hazard forecasting and these methods have their own advantage each other. But there is an unsolved problem in the exploration of unfavorable geologic in the advanced forecast of geology in tunnel filled with water in the advanced forecast of geology in tunnel.Transient Electromagnetic method (TEM) is a new method used to forecast the unfavorable geologic filled with water or mud. The new method is sensitive to the unfavorable low resistively geologic bodies filled with water or mud such as faults, caves, zones of rock fracture and water-saturated fracture zone. This thesis adopts the finite element software ANSYS to analyze transient electromagnetic method Geological Prediction. In-depth study is carried on two forms of low resistively adverse geology from the impact of the transient electromagnetic abnormal response. Influencing factors of the geological anomaly response and the law of the abnormal response changing with the factor were studied. The transient electromagnetic response of multi-factor and the sensitivity of the factors were studied using the numerical Methods.更多还原