浅海桶形基础平台抗拔力与抗倾稳定分析     

薛万东 《海洋科学进展》2001,19(3):87-92

平台在海上受风、浪、流、冰等水平载荷作用产生倾斜 ,而土壤粘接力、摩擦力和土抗力是平台的抗拔和抗倾力 ,桶基平台应满足抗拔、抗倾稳定的要求 ,以保证平台的整体稳定性。讨论了桶基平台受水平力作用时 ,桶形基础的破坏模式及其计算方法 ,阐述了抗倾稳定计算方法  相似文献   

浙江主要气象灾害概述     

温树伟  张淑云 《海洋学研究》1991,9(1):65-71

气象灾害每年都有,只是轻重程度不同。就全国和全省范围来说,很少有真正风调雨顺的年份。本文根据1951～1988年38年的气象历史资料及有关政府部门的材料、简报、报道,统计出台风、洪涝、海上大风和强对流等几种主要气象灾害对浙江经济造成损失和伤亡人数。文中对主要气象灾害的特点、一般规律和灾情作了概述,并列出一些典型实例,提出了预防气象灾害的意见。  相似文献   

现代抗震设计理论的发展过程   总被引：18，自引：0，他引：18  

谢礼立  马玉宏 《国际地震动态》2003,(10):1-8

介绍了现代抗震设计理论的发展过程，基于性态的抗震设计理论的提出背景、发展情况及研究内容；详细介绍了基于性态的抗震设计理论的抗震设防方法；指出了基于性态的抗震设计理论与传统抗震设计理论的主要区别及特点。  相似文献   

On the circulation in the East Frisian Wadden Sea: numerical modeling and data analysis     

Emil V. Stanev  Jörg-Olaf Wolff  Hans Burchard  Karsten Bolding  Götz Flöser 《Ocean Dynamics》2003,53(1):27-51

 In this paper we use a combination of numerical modeling and data analysis to gain a better understanding of the major characteristics of the circulation in the East Frisian Wadden Sea. In particular, we concentrate on the asymmetry of the tidal wave and its modulation in the coastal area, which results in a complex pattern of responses to the sea-level forcing from the North Sea. The numerical simulations are based on the 3-D primitive equation General Estuarine Transport Model (GETM) with a horizontal resolution of 200 m and terrain-following vertical coordinates. The model is forced at its open boundaries with sea-level data from an operational model for the German Bight (German Hydrographic Office). The validation data for our model simulations include time series of tidal gauge data and surface currents measured at a pile in the back-barrier basin of the Island Langeoog, as well as several ADCP transects in the Accumer Ee tidal inlet. Circulation and turbulence characteristics are investigated for typical situations driven by spring and neap tides, and the analysis is focused on dominating temporal and spatial patterns. By investigating the response of five back-barrier basins with rather different morphologies to external forcing, an attempt is made to elucidate the dominating physical balances controlling the circulation in the individual sub-basins. It is demonstrated that the friction at the seabed tends to slow down the tidal signal in the shallow water. This leads to the establishment of flood dominance in the shallow sea north of the barrier islands. South of the islands, where the water volume of the channels at low tide is smaller than the tidal prism, the asymmetry of the tidal signal is shifted towards ebb dominance, a feature which is particularly pronounced at spring tide. At the northern open boundary, the tidal wave propagating from west to east generates a sea-level difference of ∼1 m along the boundary, and thereby triggers vigorous alongshore currents. The frictional control in the model is located in the inlets, as well as along the northern boundary. The correlation between velocity and turbulent kinetic energy tends to the establishment of a net southward transport, giving theoretical support to the observed accumulation of sediments on the intertidal flats. Weak turbulence along the northern shores of the barrier islands and the small magnitude of the residual currents there promote accumulation of suspended matter in these areas, although wave action will generally counteract this effect. Received: 29 May 2002 / Accepted: 26 September 2002 Responsible Editor: Jean-Marie Beckers Acknowledgements We are indebted to S. Dick for providing the data from the operational model of BSH and to B. Flemming for the useful discussions. The topography data and Fig. 1 have been prepared in cooperation with F. Meyer. Figure 2 has been prepared by G. Brink-Spalink. We also thank for the comments from an anonymous reviewer which helped to improve our paper.  相似文献   

基于GIS的保险防灾信息系统构建   总被引：1，自引：0，他引：1  

向南平  江资斌  左廷英 《测绘工程》2003,12(2):17-19

从分析保险防灾业务的特点出发，提出利用MapGIS强大的二次开发功能构建保险防灾信息系统。作者结合自己的开发实践，比较全面的介绍了如何利用GIS技术来管理保险防灾业务的空间信息，并对这些关键的技术进行较全面阐述，对基于地理信息的信息系统的开发提供了许多有益的解决方案  相似文献   

我国抗灾建设与防灾对策之研究   总被引：1，自引：0，他引：1  

彭珂珊  张俊飙 《华东地质学院学报》1997,20(3):245-251

本文根据我年来研究国内外防灾经验，分析了我国自然灾害的基本现状，总结了建国以来的减灾工作状况，提出了经济发展听防灾之对策，为下世纪我国抗灾策略提供了基本思路。  相似文献   

液体高膨胀材料充填堵漏试验应用     

滕子军  赵善友 《探矿工程》2005,32(9):49-51

介绍了钻探施工中，利用膨胀材料充填、堵漏的新工艺，其具有经济、高效、安全的特点。  相似文献   

论工业企业防震减灾   总被引：1，自引：0，他引：1  

赵广堃 《高原地震》1994,(2)

本文论述了我国工业企业防震减灾现状，提出工业企业防震减灾的目标和指导原则，以及部分工业企业的防震减灾措施和对策。  相似文献   

FD─1型多功能防盗报警器     

邹平  李道贵  李飞 《地震研究》1996,(4)

地震监测设施点多面广，被盗、被破坏的情况时有发生，直接和间接的经济损失十分严重。由此引起的仪器停记，造成资料中断的损失则无法用金钱计算、针对此问题，我们运用模糊控制技术技术，研制开发了ＦＤ－１型多功能防盗报警器。它通过检测来访者的文明程度，采取一系列相应的反击措施：即自动打开室内灯光、电视机、录音机等，造成室内有人的假象；对不知趣者给予警告、警铃……直至发出＂有电危险，请勿靠近＂的警告和电击（无生命危险），达到御敌于门外之目的。该报警器不仅适用于地震台站，也广泛用于各企业事业单位和家庭防盗等。  相似文献   

浅谈《防震减灾法》在河北省贯彻执行中的问题及对策     

陈明传  王琳  岳秀侠  李冬圣 《国际地震动态》2006,(6):42-44

从贯彻实施防震减灾法律法规的实践入手,针对《防震减灾法》在河北省贯彻实施过程中存在的问题,进行分析探讨,提出了解决的对策,目的在于更进一步促进防震减灾工作的深入开展。  相似文献