基于水利检测技术的水利工程结构监测研究

本文主要研究了基于水利检测技术的水利工程结构监测方法。首先介绍了水利工程结构的重要性和可监测性。然后概述了常见的水利检测技术及其工作原理,包括基础的技术和高级的技术。在此基础上探讨了基于水利检测技术的水利工程结构监测方法的选择和应用,以及其优缺点和改进。希望通过本文的研究,可以为水利工程结构的监测提供一些有益的思路和方法。

水利水电工程结构抗震设计的关键技术及应用研究

为了更有效地提高水利水电工程结构的抗震性能,对抗震设计的关键技术进行了深入的研究,并探讨其在实际工程中的应用情况。首先回顾了水利水电工程结构抗震设计的基本原则和方法,包括选择合适的地震参数,提出科学的地震动机理特性,考虑有效的结构控制策略等。然后,通过针对一些具体的水利水电设施项目,如大坝、进水塔、水电站等,分别对其进行结构建模、动力分析以及地震反应评估,实地验证了以上关键技术的有效性和准确性。最后,针对结构的抗震设计措施,提出了多项优化方案,如采用减震设备,应用新型材料等。

水利工程中金属焊缝缺陷的超声检测方法比较研究

为研究基于超声的无损探伤方法在水利工程金属结构焊缝缺陷识别中的应用,利用常规超声检测技术、超声相控阵技术、衍射时差法(Time of Flight Diffraction, TOFD)超声检测技术对水利工程金属结构焊接试块缺陷进行识别,分析了各种缺陷在超声无损探伤技术中的特征显示。研究结果表明:常规超声检测技术、TOFD检测技术均能对各种缺陷实现信号显示,超声相控阵检测技术对气孔和横向裂纹的显示不够明显,但对其它缺陷的检出效果较为明显;常规超声检测技术对操作人员的要求较高,对缺陷的定性困难,精度不高;TOFD检测结果中气孔和横向裂纹的显示呈现出一种特殊的弧形,有一定高度的内部裂纹和未熔合的信号由上下尖端衍射波组成,根部未焊透上下尖端信号不够明显;相控阵检测结果直观,可以较精确地测量缺陷的埋藏深度、自身高度、长度等,但在扫查点状缺陷或者与超声声束平行的裂纹缺陷时,检出率极低。

CAE技术在水利工程结构分析中的应用

本文阐述了在水利工程结构设计过程引入计算机辅助工程(CAE)技术对于缩短设计周期、提高设计质量的重要意义,介绍了CAE技术应用于水利工程结构设计过程的技术应用特点,并针对水利工程结构中常见的拱坝结构,采用商用CAE软件ANSYS进行了静力分析。

Research on the optimal design of spillway tunnel

In order to meet the needs of various tasks of water conservancy project, tunnel excavation under the ground, called hydraulic tunnel. Hydraulic tunnel according to the functions of flood discharge, water diversion, irrigation, water supply, and the construction diversion tunnel of desilting emptying. Nowadays, water conservancy project on flood discharge runnel design requirements more and more high, so the factors taken into account the amount of spillway tunnel engineering, engineering cost, structure design and other factors to evaluate nature of the spillway tunnel is very important. Therefore, in actual construction, of spillway tunnel of optimization design, whether from the economic point of view, or from the point of view of safety and applicability are necessary. This article mainly from the overall layout of flood discharge tunnel, structure design and so on, and then discuss the optimization scheme.

予制混凝土板桩和方桩沉入工程监理要点

上海地处长江三角洲东南前缘,多数地基为巨厚的第四纪沉积物,土质不均匀,强度较低,压缩性和灵敏度较高,因此重要结构工程一般不采用天然地基作为基础。多采用桩基础。在桩基础工程中,又以预制砼板桩和砼方桩应用较为广泛。其中板桩主要用于增加渗径、防止地基土流失等。方桩主要用于加强地基强度,增强结构稳定性、抗滑移等。板桩和方桩的合理结合具有良好的功能价值比。上海地区的水利结构工程,特别是防汛墙工程,大多采用8～14m板桩和方桩作为承台基础。在1998、1999、2000三年中。

Dynamic response of gravity dam model with crack and damage detection

Gravity dam is a typical structure that has been frequently used in the fields of water conservancy engineering, and the safety of the structure has received widespread attention recently. Due to earthquakes or other reasons, gravity dams normally have damage such as cracks in practical service. Damage in the structures can alter the structural dynamic behavior and seriously affect structural performance. Maintaining safety and integrity of the gravity dam structures requires a better understanding of dynamic response of structure with damage and associated damage detection method. In order to study thoroughly the dynamic behavior of gravity dam with damage, the sweep vibration responses of the gravity dam with and without damage are investigated. The experimental results show that the peak-peak acceleration responses all increase for the structure is with crack. At the same time, a structural damage detection method, i.e., the local damage factor (LDF) method, is considered in the study of gravity dam damage detection when the dam is subjected to the base excitation. It is shown that the LDF method can be used as a damage index and is capable of evaluating both the presence and relative severity of structural damage, and it can be used as a viable condition assessment and damage identification technique to detect and quantify the damage in the gravity dam.