公路工程建设地质灾害危险性评估的方法与内容——以诸永高速公路为例

地质灾害危险性评估已依法被作为地质灾害易发区工程建设可行性研究报告的组成部分。本文以诸永高速公路为例，介绍了公路工程建设场区地质灾害危险性评估工作中工程分类、现状评估、预测评估、综合评估的内容与方法。对地质环境条件复杂、地质灾害发育、工程类型繁多的公路工程地质灾害危险性评估具有借鉴作用。     

中国综合地球观测系统10年规划设计与国际发布

2007年11月30日,第4届地球观测峰会在南非开普敦顺利召开,地球观测再次成为世人关注的焦点.会后发布了<开普敦宣言>、地球观测组织(GEO)进展报告及GEO近期成果.科技部长万钢率中国代表团出席此次峰会,中国气象局局长郑国光再次当选为GEO的联合主席.中国作为GEO的创始国之一,两年来积极推进GEOSS 10年执行计划,在GEO国际事务中发挥了越来越重要的作用.国家科技部部署与组织了<中国综合地球观测系统十年规划>(中、英文肋编写工作,11     

Simplified Method for Calculating Standing Wave Pressure on Vertical Breakwater

Through numerical modeling, a kind of simplified calculating method for standing wave pressure on vertical face breakwater have been put forward. Not only the formulas proposed in this paper are simple in form and very easy in use, but also they possess continuity on the full range of standing wave. And more, the precision requiremennts of calculation can be satisfied to a certain extent in engineering practice.     

Asymptotic Analysis Methods for Structural Reliability

- Applying Laplace asymptotic approximation of integral, asymptotic analysis methods of structural reliability are proposed in generalized and orthogonal random space. Analytic results show that the proposed methods are simple in calculation and accurate enough for problems of continuous random variables.     

Dynamic Analysis of a Single-Column Platform

In this paper, a single-column structure used as well-head platform is studied. The loads of wave and current exerted on the single-column will be greatly reduced, therefore the cost of the structure will be decreased. The advantages of the single-column structure compared with ordinary jacket structure are explained. A dynamic analysis of this type of structure is made and some problems related to dynamic analysis are solved. In order to check the reliability of computation theory and programme, model tests have been carried out. However, as space is limited, the conclusion of tests will be introduced in another paper. Therefore, this type of structure is applicable for proctical engineering.     

Design of Submarine Pipeline in BZ34-2/4 Oil Field

This paper presents the detail design conditions, design criteria and methods as well as design conclusions of the process, structure and corrosion of the production flowlines and high pressure water injection lines in BZ34-2 / 4 oil field in Bohai Bay. At present this design represents the design capability and level in the field of the submarine pipeline engineering of China.     

Analysis of Wave Height in Front of a Wave Absorbing Structure with Rubble Foundation

Wave absorbing structures have been widely applied in many countries. In the present paper, the wave heights in front of a vertical wave absorbing structure with rubble foundation as well as in the wave chamber of the structure are analysed using an approximative calculation method, and the dissipating effect of the structure is verified. On the basis of the results of regular waves, the relative wave heights of irregular waves in front of the wave absorbing structure as well as in the chamber have also been analysed.     

地质资料数字化的作用及推进数字化工作的途径

阐述了数字化是当前地质档案管理的发展趋势,提出了应加快实现档案数字化网络建设及地质资料管理数字化建设目标。     

Wave Forces on Submerged Semi-Circular Breakwater and Similar Structures

—The results of design and experiment of a submerged semi-circular breakwater at the Yangtzeestuary show that the submerged structure will be unsafe when the general empirical wave force formulafor semi-circular breakwater is used in design.Therefore,a new calculation method for the wave forces act-ing on a submerged semi-circular structure is given in this paper,in which the wave force acting on the in-side circumference of semi-circular arch is included,and the phase modification coefficient in the generalempirical formula is adjusted as well.The new wave force calculation method has been verified by the re-sults of seven related physical model tests and adopted in the design of the south esturary jetty of the firststage project of Deep Channel Improvement Project of the Yangtze River Estuary,the total jetty length be-ing 17.5km.     

Study on the Interaction of Water Waves with Semi-Circular Breakwater

—The present study investigates the interaction of steep waves with semi-circular breakwaterwith the complex plane＇s Cauchy boundary integral theorem.The boundary integral method is used totransform the calculation in fluid domain into its boundary alone.In the calculation the computation do-main is moved with the propagation of waves.A numerical solution is obtained for incident Stokes wavespassing the submerged obstacles.This method has been extended to the calculation of wave run-up on aslope for estimating wave overtopping.