| 1. | Problems needing attention in survey of immersed tunnel
沉管隧道测量中值得注意的几个问题 |
| 2. | Calculation methods for settlements of immersed tunnels induced by tidal load
潮汐荷载引起沉管隧道沉降计算方法 |
| 3. | Study on navigability during the construction of yangtze river immersed tunnel in nanjing
南京长江水底隧道施工期通航问题研究 |
| 4. | The conclusions of this paper can be used as a reference in earthquake - resistant design and analyses of immersed tunnels
以上结论可供有关人员进行抗震设计和抗震分析参考。 |
| 5. | " the government has examined different tunnel options for the cwb including the immersed tunnel and bored tunnel options . however , these options have their limitations , " the spokesman said
发言人说：政府曾为中环湾仔绕道研究不同的隧道方案，包括在海床上采用沉管的方法及钻挖隧道的方法，不过这些方案各有限制。 |
| 6. | In this paper taking nanjing changjiang immersed tunnel as an example , the author made a research of aseismatic analyses of immersed tunnels by introducing fem , and also , made a further discussion of factors such as depth , geologic conditions , water and boundary conditions
本文利用南京长江沉管隧道的基本资料，探讨了如何利用动力有限元法对沉管隧道进行抗震分析，并利用这一方法分析了埋深、地质条件、水、边界条件等因素对沉管隧道地震反应的影响。 |
| 7. | Abstract : based on references and works of authors , this paper presents the developments , key techniques of immersed tunnel tube in abroad and home recently years , and an alyses its advantages and shortcomings . finally , it gives an intro duction of so me model experiments ( including transportation , immersing , silting and ventilating ) for immersed tube
文摘:对沉管隧道的国内外发展情况、沉管隧道的防水、地基处理、浮运沉放等技术作了概述，文中还将沉管隧道与桥梁、沉埋法与盾构法进行了相应比较，指出了沉管隧道的优点及有关顾虑，最后就有关沉管隧道的模型试验作了相应介绍 |
| 8. | Currently , researchers from home and abroad usually use simplified models in the aseismatic analyses of immersed tunnels , which can not properly simulate the two functions of the soil , while the finite element method solves this problem successfully , and the development of numeric calculation and computer technology lays a solid basis for its application , it is a pity that the applications of fem is not common currently
目前，国内外对沉管隧道进行抗震分析时，大多采用简化计算模型，将土的作用以等价弹簧和阻尼器代替，不能适当模拟土既是地震波的传播介质又是结构物的支承介质的双重作用。动力有限元法的连续介质模型很好的解决了这一问题，数值计算理论和计算机技术的发展为该方法的应用奠定了坚实的基础，然而，目前这方面的应用还很少。 |
| 9. | However , immersed tunnels are generally build in soft soil shallowly and affected greatly by the earthquake . in view of its importance and underwater particularity , the destruction of immersed tunnels will be disastrous . accordingly , it is necessary to carry out earthquake - resistant research of immersed tunnels
然而，沉管隧道一般修建在软弱地层中，埋置浅，受地震影响大，同时由于沉管隧道的重要性及在水下的特殊性，一旦破坏将产生灾难性后果，因此，对沉管隧道进行抗震研究是十分必要的。 |
| 10. | This paper deals with seismic analysis of an immersed tunnel using the travelling wave method the objective of the analysis is to obtain the maximum stresses in the tunnel body and the relative displacements at the joints for design purpose in analysis ， the axial and transverse input waves are treated as two independent waves with different amplitudes and periods the method has been found to have the advantages of simplicity and clearness in physical concepts however ， reasonableness of the prediction by the method depends largely on the input data ， such as the wave amplitude ， the wave length ， the propergation speed of the travelling wave as well as the reaction coefficient of the ground thus ， determination of the input data is discussed in detail finally ， the method is applied to analysis of huangsha - fangcun immersed tunnel across the pearl river in guangzhou
将行波法应用到刚度较大、分段较多的水下沉管隧道的地震分析中，提出把轴向、横向两个输入波处理为两个独立的行波的方法行波法是否符合实际，与输入地震波的有关参数及地基系数选取有很大关系，作者对此进行了比较深入的讨论，使输入参数的选取简单、明确，便于对计算结果进行分析与判断最后应用此法对珠江水下隧道的工程实例进行了计算 |
