【摘要】 由于海底隧道工程环境的特殊性与复杂性,因此为保证海底隧道运营安全,必须对海底隧道进行长期的结构健康监测,以此了解隧道结构在复杂环境中的受力变化状况,从而及时了解隧道结构损伤位置及损伤程度,进而对结构安全状况做出评估并加以有效处理。在对隧道结构健康监测现状进行总结后,针对海底隧道工程特点,结合在建的厦门翔安海底隧道工程,通过必要的数值模拟计算,首先确定出该隧道的监测内容及重点监测部位,随后结合工程实际情况确定监测断面位置、监测项目及监测仪器的选择、监测点布置等内容。同时,研究结果表明:(1)不良地质段隧道结构安全监测,除对该位置隧道结构进行重点监测外,还应当在邻近较好地质条件处设立辅助监测断面,便于分析不良地质条件对隧道结构的影响作用;(2)海底隧道结构的渗漏情况可通过监测其重点部位,如拱部的衬砌开裂情况,并配合相应位置的衬砌结构水压变化情况而间接获得。研究结果将对我国在建或拟建的海底隧道结构健康监测起到一定的指导作用。更多还原

【Abstract】 Due to the particular and complex engineering environment of subsea tunnel,the long-term structural health monitoring should be adopted to ensure the operation security of subsea tunnel. At the same time,stress change state of tunnel in complex environment will be realized. Then the damage position and damage degree of tunnel structure will be known in time for evaluating structure safety and disposing it effectively. For Xiamen Xiang′an subsea tunnel,based on the present state generalization of tunnel structure health monitoring and characteristic of subsea tunnel engineering,the monitoring contents and important monitoring sites should be determined firstly according to necessary numerical simulation. Secondly,according to the practical situation of engineering,monitoring section positions,monitoring items and monitoring instruments will be selected. Besides, the following conclusions can be drawn. (1) To monitor the safety of tunnel in unfavorable geological area,except for the important site of tunnel,the auxiliary monitoring section should be also set up in adjacent and preferable geological conditions. Then it is very convenient to analyze the influence of unfavorable geological conditions on tunnel structure. (2) The leakage situation of subsea tunnel structure could be obtained by indirect monitoring results in main areas,such as arch lining cooperating change of lining water pressure in corresponding position. Issues mentioned above may have a guiding sense to the application of structural health monitoring of subsea tunnels under construction in China.更多还原