PRESENT　SITUATION，FEATURE　AND　DEVELOPMENTAL　IDEAS　OF　BORDER　OPENING　IN　XINJIANG     

谢香方  李春华 《中国地理科学(英文版)》1995,5(3):212-221

ＰＲＥＳＥＮＴＳＩＴＵＡＴＩＯＮ，ＦＥＡＴＵＲＥＡＮＤＤＥＶＥＬＯＰＭＥＮＴＡＬ　ＩＤＥＡＳＯＦＢＯＲＤＥＲＯＰＥＮＩＮＧＩＮＸＩＮＪＩＡＮＧＸｉｅＸｉａｎｇｆａｎｇ（谢香方）；ＬｉＣｈｕｎｈｕａ（李春华）（ＸｉｎｊｉａｎｇＩｎｓｔｉｔｕｔｅｏｆＧｅ...  相似文献   

WATER ENVIRONMENT AND SUSTAINABLE DEVELOPMENT ALONG THE BELT OF XINJIANG SECTION OF THE NEW EURASIAN CONTINENTAL BRIDGE     

郝毓灵 《中国地理科学(英文版)》1997,7(3):251-258

TheimportantgUidingprinciplethatenstiresthesustainabledevelOPmentOfChinais"The21stCentury'sAgendaofChina"(Office,1994).ThesustainabledevelopmentintheareasalongthenewEtirasiancontinentalBridge(sectioninXinjiang)belongstooneoftheprioritemsof"theagenda".TheopeningofthenewEtirasiancontinentalBridgenotonlybringsabbotgreatoPPOrtunitiesfordevelopmentofXinjiang,butalsoplaysamajorroleinreducingthegapbetweentheWesternandeasternpartsofChina.Furthermore,itcantriggerfuttiresustainabledevelOPmentin…  相似文献   

新亚欧大陆桥新疆段环境灾害分布规律   总被引：7，自引：0，他引：7  

陈亚宁  陈利军 《地理学报》2000,55(1):75-83

根据实地调查和收集到近四十年资料、分析新亚欧大陆桥新疆段环境灾害成因、类型及成灾方式,阐明了陆桥新疆段以洪水、风沙灾害为主要类型的灾害特点,通过对不同灾害类型的时空强分布的统计分析,揭示了灾害过程春季３～４月以盐碱土不良路基、风沙灾害为主,夏季６～７月份以洪水为主的灾害时空活动特点和区域分异规律。  相似文献   

沿江与沿桥城市发展对比研究     

赵一如  姚建华 《地域研究与开发》2000,19(3):21-25

沿江产业带和沿桥经济带同是横跨我国东、中、西三大地带的经济建设的的级轴线,其城市经济发展状况存在很大差异。文章通过对二者的城市等级规模、空间结构、城市化程度及积能结构等方面进行具体的差异比较,对导致才者差异的主观及客观原因进行深入分析,提出了几点适合陆桥知身特点,结合陆桥现有机遇的具体建议。  相似文献   

Seismic response of isolated bridges with soil–structure interaction     

N. P. Tongaonkar  R. S. Jangid   《Soil Dynamics and Earthquake Engineering》2003,23(4):287-302

The modern transportation facilities demand that the bridges are to be constructed across the gorges that are located in seismically active areas and at the same time the site conditions compel the engineers to rest the pier foundation on soil. The purpose of this study is to assess the effects of soil–structure interaction (SSI) on the peak responses of three-span continuous deck bridge seismically isolated by the elastomeric bearings. The emphasis has been placed on gauging the significance of physical parameters that affect the response of the system and identify the circumstances under which it is necessary to include the SSI effects in the design of seismically isolated bridges. The soil surrounding the foundation of pier is modelled by frequency independent coefficients and the complete dynamic analysis is carried out in time domain using complex modal analysis method. In order to quantify the effects of SSI, the peak responses of isolated and non-isolated bridge (i.e. bridge without isolation device) are compared with the corresponding bridge ignoring these effects. A parametric study is also conducted to investigate the effects of soil flexibility and bearing parameters (such as stiffness and damping) on the response of isolated bridge system. It is observed that the soil surrounding the pier has significant effects on the response of the isolated bridges and under certain circumstances the bearing displacements at abutment locations may be underestimated if the SSI effects are not considered in the response analysis of the system.  相似文献   

Damping/global energy balance in FE model of bridge foundation lateral response     

R. Dobry  A. Pecker  G. Mavroeidis  M. Zeghal  B. Gohl  D. Yang   《Soil Dynamics and Earthquake Engineering》2003,23(6):483-495

A global energy analysis is presented of three static unloading–reloading foundation lateral loading cycles, calculated using the nonlinear finite element (FE) program DYNAFLOW. This simulates seismic action on an offshore pier foundation in the Rion-Antirion Bridge in Greece, located in deep-sea water (65 m). A cyclic horizontal force is applied at a height of 30 m to a rigid raft 78 m in width placed on the surface of an idealized 2-layer soil profile consisting of a 3.5 m man-made gravel layer over soft deep natural clay, with elastic vertical steel inclusions reinforcing the soil. Results of the two-dimensional FE run are used for the energy analysis. It is verified that for the three cycles, the sum of energies associated with the external forces and moments, mostly dissipated through hysteresis loops, is about equal to the sum of the total internal energies dissipated or stored in the system. For the smaller loops almost all energy is dissipated in the soil, while for the largest loop about half of the energy is dissipated by horizontal sliding at the raft-soil interface. Global damping ratios obtained from the areas of the horizontal and rocking moment hysteresis loops are about double of those computed from the corresponding static backbone curves using the Masing criterion.  相似文献   

古丝绸之路与新亚欧大陆桥：河西走廊经济发展思考     

姚建华  郎一环 《干旱区地理》1996,19(1):10-13

河西走廊在古丝绸之路中占有重要的地位和作用。新亚欧大陆桥开通之后，河西能否依桥再现辉煌，必须从古丝路与新陆桥的特点出发，作对比研究。本文分析了沿海和沿桥的历史特点与现状，提出了河西经济发展应采取的积极主动对策，即主动上桥、逼桥赐惠；人车分离与千方引客；西进东出、走出封闭。  相似文献   

新亚欧大陆桥与新疆矿产资源开发的初步研究   总被引：1，自引：0，他引：1  

金海龙 《干旱区地理》1996,19(1):17-20

本文通过对新亚欧大陆桥国内段、中亚段、东欧段及西欧段矿产资源优劣的分析，提出了新亚欧陆桥贯通形热下新疆矿产资源合理开发利用的对策。  相似文献   

亚欧大陆桥与青海旅游业     

张忠孝  朱丽东 《干旱区地理》1996,(1)

在简述亚欧新陆桥在我国境内基本概况及旅游潜力估价的基础上，从青海旅游资源特征出发，探讨了青海旅游业在新陆桥中国旅游业中的特殊地位及青海旅游业发展在青海经济开发中的战略意义．  相似文献   

江阴大桥南塔墩地基基础安全监控模型   总被引：6，自引：0，他引：6  

陈志坚 《岩土工程技术》2001,(1):41-44

江阴大桥南塔墩座落于缓倾顺向高边坡上，其地基岩体由互层状砂、页岩组成，基桩上部20m采取桩周摩擦失效处理。阐述了地基基础安全监测网的构成及监测目的。分别建立了基桩桩顶轴力、摩擦失效段底部轴力、嵌岩段轴力以及外部变形监控模型，并结合监测成果对地基基础安全性进行评价。  相似文献