基于遥感影像的三星工业园区建设进展及区域功能置换监测研究     

屈颖  李若  田超  陈通 《测绘与空间地理信息》2015,(12):87-92

基于2011年5月至2014年4月的多源、多时相遥感影像和园区规划数据,利用摄影测量、图像处理、影像解译等相关技术,对三星工业园区进行建设进展、区域功能置换情况的统计和对比分析。研究结果表明:监测区域在开工建设的一年半时间内,一期项目综合保税区主体结构已初具规模,但是建设进展仍然比预期滞后。区域功能置换方面,由原来传统的粗放型农业用地结构变成了一个集电子信息、科技研发、保税物流、虚拟口岸为一体的自由贸易示范区。  相似文献   

过江通道大直径盾构带压进仓查/换刀技术          下载免费PDF全文

卢春林 《探矿工程》2014,41(5):81-84

大直径气垫式泥水平衡盾构机在不同地质条件长距离掘进中,都会对盾构机刀具产生不同程度的磨损,尤其在砂卵石为主的地层、石英含量超高岩层及上软下硬地层,盾构机刀盘、刀具更易磨损。为保证盾构机刀盘使用安全,需经常带压进仓进行刀具检查,对边滚刀、中心滚刀按不同磨耗标准进行更换。通过某过江通道带压进仓查/换刀工程实例,对大直径盾构带压进仓查/换刀施工工艺和方法进行总结。  相似文献   

强夯置换法在合肥市樊洼路采石坑杂填土地基处理上的应用   总被引：1，自引：0，他引：1  

吴承明  郭正言 《安徽地质》2007,17(4):286-288

强夯法多年来广泛应用在建筑、水利、交通、港口等多种工程地基加固上,本文介绍了强夯置换法在城市道路深厚杂填土及淤泥质土地基加固上的应用,内容包括试验、施工、检测.采用强夯置换法取得了良好的经济效益和社会效益,目前正是中国城市建设的大发展时期,可供同类工程参考.  相似文献   

人造砂岩制作方法及其声学性质研究     

司文朋  魏建新  狄帮让  王谊川 《地球物理学进展》2013,28(4)

人造砂岩具有参数可控特点,可广泛的应用于物理模拟及实验研究领域,文章介绍了压制法制作人造砂岩的基本流程.对人造砂岩物理参数及声学性质进行实验研究.测量了密度、孔隙度等参数,给出压制压力与密度、纵波速度关系图.利用超声波透射法测量人造砂岩纵横波速度,对人工砂岩在饱含气与饱含水状态下速度变化进行定量分析,给出纵横波速度随孔隙度变化曲线.饱含气状态变化到饱含水状态后,纵波速度上升,横波速度下降.利用Gassmann方程对流体替换后速度进行预测,实际测试数据的纵波速度与预测计算数据比较吻合.纵横波速度变化规律与天然砂岩基本一致.  相似文献   

Reinforcement effects of ground treatment with dynamic compaction replacement in cold and saline soil regions     

Yu Zhang  JianKun Liu  JianHong Fang  AnHua Xu 《寒旱区科学》2013,5(4):0440-0443

The mechanical property of saline soils varies with moisture and climate in the cold and salt lake region of Qinghai-Tibet Plateau, which influences project construction. In order to improve foundation reinforcement effect of the Qarhan–Golmud Highway, Qinghai Province, China, dynamic compaction replacement (DCR) composite foundation was applied in saline soils. A field experiment was conducted in this area, where strength and working mechanism of pier-soil and deformation modulus of the composite foundation was analyzed after reinforcement. This paper presents methods for determining the coefficient on the bearing capacity evaluation and deformation modulus of composite foundation with DCR. Reinforcement case of DCR is highly effective in saline soils of the salt lake regions, which helps the migration of water and salt in saline soils.  相似文献   

安徽省土地置换政策制定研究     

张庆军 《安徽地质》2012,(2):81-83

我国进入经济发展的快速时期,各个地方尤其是城市化和工业化发展较快的地区对建设用地的需求越来越大,开展对土地的整治和置换已经上升为国家层面的战略部署。本文在对安徽省建设用地管理现状和存在问题进行分析的基础上,提出未来安徽省土地置换政策制定的工作思路与目标任务。  相似文献   

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潘国荣  宋蕴璞  李怀锋  张鹏 《大地测量与地球动力学》2012,32(2):78-81

???????????????·???????·?亭???????????????????????????????????????????????????????????????????о??п?????????????????????????????????????????????????????????С?  相似文献   

昆明市松华坝水源区表土磁学特征及其环境意义   总被引：1，自引：0，他引：1  

刘勇 《云南地理环境研究》2008,20(3):33-37

采用环境磁学研究方法研究了昆明市松华坝水源区表土的磁学特征,结果表明,松华坝上游地区表土未受或很少受到污染,土壤磁化率偏低,土壤中的主要载磁矿物为磁铁矿、磁赤铁矿,另外还含有少量弱磁性的磁黄铁矿和针铁矿。松华坝下游坝区土壤受到了一定程度的污染,污染表土的磁学特征表现为：高磁化率,磁化率与频率磁化率呈现较强的负相关,污染土壤中的主要载磁矿物为强磁性的磁铁矿。松华坝下游土壤污染主要局限于距水面2m的范围之内．污染物主兽来源干农业面源污染．  相似文献   

Residence times of Manukau Harbour,New Zealand     

W. N. Vant  B. L. Williams 《新西兰海洋与淡水研究杂志》2013,47(3-4):393-404

Residence times of the three main channel systems of Manukau Harbour were calculated by methods based on the salinity measured in 10 tidal excursion segments: the freshwater replacement technique and a volume exchange model. The amount of freshwater present in the segments at high water was low (< 11% throughout the year), so salinities were high, with minimum values (winter) in each segment being in the range 30.1–34.0 (compared with a median value of 34.5 in the nearby coastal waters). The proportion of each segments’ volume which was exchanged with an adjacent segment during a tidal cycle varied markedly across the harbour, from ≤ 5 % in several shallow inner harbour segments to 65% in a deep segment adjacent to the entrance channel. For annual average conditions the freshwater replacement times of the channels were 11–18 days. Slightly longer residence times—12–26 days—were obtained from the volume exchange model. Calculated replacement times for two non‐conservative tracers— inorganic phosphorus and nitrogen—were approximately half those for freshwater, as 5–12% of these species disappeared from the water column each day.  相似文献   

Stress Sharing Behavior and Its Mechanism during Consolidation Process in Composite Ground Improved by Sand Compaction Piles with Low Replacement Area Ratio     

S.-K. You  K. Oda 《Marine Georesources & Geotechnology》2013,31(4):287-304

In order to accurately design a sand compaction pile (SCP) with low replacement area ratio, it is important to understand the mechanical interaction between the sand pile and clay ground and its mechanism during consolidation process in composite ground. In this article, therefore, a series of numerical analyses on composite ground improved by SCP with low replacement area ratio were carried out. The applicability of numerical analyses, in which an elasto-viscoplastic consolidation finite element method was applied, were confirmed by comparing the results obtained from a series of laboratory model tests with the composite ground improved by SCP. Through the results of the numerical analyses, mechanical behavior of the sand pile and clay in composite ground during consolidation is elucidated, together with a stress sharing mechanism between sand pile and clay.  相似文献