城市地下空间地籍管理研究     

王超领  孙庆华  顾卫锋  王瑞 《上海国土资源》2011,32(1):54-58

目前城市地下空间开发利用强度和规模不断增大,如何高效地管理地下空间资源已成为城市土地管理工作面临的新课题。文章从地下空间土地权利、审批登记、地籍调查等角度对地下空间地籍管理问题进行了分析探讨,可为开展和加强地下空间地籍管理提供指导和借鉴。  相似文献   

低丘红壤区不同降雨类型对浅层地下水位动态变化的影响——以江西省余江县为例   总被引：1，自引：0，他引：1  

程训强  王明珠  唐家良  张斌 《山地学报》2011,29(1)

为研究低丘红壤区不同降雨类型对浅层地下水埋深的影响,在江西省余江县选择受自然因素影响较大的7口井进行分析。结果表明:影响浅层地下水水位变化的因素除了与降雨量、蒸发量、地表径流以及降雨过程中入渗土壤的雨水量外,还与降雨历时、降雨前期土壤的湿度等因素有关;据监测2 a的地下水位、降雨量等动态变化,从中选出三种降雨类型(Ⅰ降雨强度小且历时长,Ⅱ降雨强度大且历时短,Ⅲ干旱无雨时突然一场中雨),其中一场中雨就可以使Ⅰ的井水位剧烈变化,一场大雨可以使Ⅱ中的井水位明显抬升,偶尔一场大雨仅能湿润Ⅲ的土壤,对地下水位没有太多的影响;在浅层地下水位与降雨量、地表径流及进入土壤的雨水(RO)的相关性分析中,以降雨类型Ⅱ的相关系数的绝对值最大,且均呈极显著负相关,而降雨量与地表径流和RO呈极显著正相关。这表明在土壤周年盈水期且连续降雨时期,可对浅层地下水进行存储,以备在干旱少雨且作物需水时使用。  相似文献   

Incident analyses of frost heaving failure of municipal underground gas pipelines in cold regions of northern China     

YaMin Li  HongSheng Li  ZengLi Liu  LiShun Chen 《寒旱区科学》2011,3(6):0473-0477

In the cold regions of northern China, incidents of municipal underground gas pipeline rupture and leakage occur quite frequently, most often in winter. To prevent harm to citizen safety and property, analysis of the causes of such cracking and leakage is therefore valuable. Two incident analyses are discussed here and the reasons why most of these types of cases occur during winter are clarified. The effects of vehicle loadings above buried pipelines are calculated and compared with the effects and calculations of frost heaving forces. We demonstrate that when the soil layer above a pipeline freezes rapidly, the soil generates repeated frost heaving, which exerts heaving forces on the pipeline that can result in fatigue crack propagation and ultimate pipeline failure. Therefore, the incident induced by frost heaving is one of the primary reasons of gas pipeline failure. Based on these analyses, we present some recommendations pertaining to the proper design, construction, and management of gas pipelines.  相似文献   

双地下物质变化区参数解算方法研究          下载免费PDF全文

董冬辉  程向明  张桢君  王建成  冒蔚 《天文学报》2022,63(3):33-97

经典天体测量仪器以铅垂线为基准测量本地的天文经纬度,因而能探测到本地铅垂线的偏转.本地铅垂线的偏转代表着测站周围重力场的变化,而这一变化与地下物质的再分布相关,由此有望帮助了解地下物质变化的情况.将本地的铅垂线偏转(Plumb Line Variation, PLV)与地下物质变化联系起来,建立了双质量体模型.在97°E–107°E和21°N–29°N范围内,考虑了3480个包含正、负质量变化(相对地质背景)的质量体组合算例,并利用差分进化(Differential Evolutionary, DE)算法进行了解算.解算得到的质量体相对于模拟值的位置误差小于米量级,质量误差小于10¹¹kg,结果精度较高.  相似文献   

便携式声波钻机在河道堤防勘探中应用分析研究   总被引：1，自引：0，他引：1  

杨正春  伍宛生  马东亮  徐连锋 《安徽地质》2015,(2):126-128

便携式声波钻机具有取样连续完整、轻便、场地适应能力强、用工少、节能高效等特点,在河道堤防勘探中具有独特优势。  相似文献   

广西地震地下流体观测现状分析     

李柳英  史水平  陆丽娟  龙政强  黄树生 《华南地震》2011,31(3):112-124

简要回顾了广西地震地下流体观测发展历程,着重分析了广西地震地下流体观测资料质量.包括稳定性与连续性、动态特征、影响因素和信息反映能力,并对广西地震地下流体观测网存在的问题进行了分析,并提出改进措施及建议.  相似文献   

数据标准在城市地下管线信息化过程中的关键作用     

解智强  王贵武  高忠  周海彬 《现代测绘》2011,34(2):25-28

地下管线数据标准直接影响数据采集、信息系统建设和后期更新维护过程.本文就昆明市城市地下管线普查探测及信息化过程中数据标准对地下管线信息化工作的影响,阐明城市地下管线信息化过程中数据标准的地位与作用,重点阐述数据标准对城市地下管线的探测、地下管线信息系统的建设以及城市地下管线更新和维护机制的重要指导作用.  相似文献   

多元线性回归算法在井下三角高程测量中的应用研究     

王帅  高井祥  胡洪  刘超 《测绘与空间地理信息》2011,34(1):63-66

通过对井下三角高程测量的原理、误差来源及精度分析,指出钢尺量取仪器高和棱镜高的误差对三角高程测量结果的影响,提出一种利用多元线性回归减小该误差影响的算法,并通过实例对三角高程测量结果进行改正,验证该算法用于提高井下三角高程测量精度是可行的,并基本达到四等水准的要求.  相似文献   

Insights into the evolution of the Thomson Orogen from geochronology,geochemistry, and zircon isotopic studies of magmatic rocks     

A. J. Cross  D. J. Purdy  D. C. Champion  D. D. Brown  C. Siégel  R. A. Armstrong 《Australian Journal of Earth Sciences》2013,60(7-8):987-1008

Abstract

Zircon U–Pb ages, εHf(t), and δ¹⁸O isotopic data together with geochemistry and limited Sm–Nd results from magmatic rocks sampled in deep-basement drill cores from undercover parts of the Thomson Orogen provide strong temporal links with outcropping regions of the orogen and important clues to its evolution and relationship with the Lachlan Orogen. SHRIMP U–Pb zircon ages show that magmatism of Early Ordovician age is widespread across the central, undercover regions of the Thomson Orogen and occurred in a narrow time-window between 480 and 470?Ma. These rocks have evolved εHf(t)_zrn (?12.18 to ?6.26) and εNd (?11.3 to ?7.1), and supracrustal δ¹⁸O_zrn (7.01–8.50‰), which is in stark contrast to Early Ordovician magmatic rocks in the Lachlan Orogen that are isotopically juvenile. Two samples have late Silurian ages (425–420?Ma), and four have Devonian ages (408–382?Ma). The late Silurian rocks have evolved εHf(t)_zrn (?6.42 to ?4.62) and supracrustal δ¹⁸O_zrn (9.26–10.29‰) values, while the younger Devonian rocks show a shift toward more juvenile εHf(t)_zrn, a trend that is also seen in rocks of this age in the Lachlan Orogen. Interestingly, two early Late Devonian samples have juvenile εHf(t)_zrn (0.01–1.92) but supracrustal δ¹⁸O_zrn (7.45–8.77‰) indicating rapid recycling of juvenile material. Two distinct Hf–O isotopic mixing trends are observed for magmatic rocks of the Thomson Orogen. One trend appears to have incorporated a more evolved supracrustal component and is defined by samples from the northern two-thirds of the Thomson Orogen, while the other trend is generally less evolved and from samples in the southern third of the Thomson Orogen and matches the isotopic character of rocks from the Lachlan Orogen. The spatial association of the Early Ordovician magmatism with the more evolved metasedimentary signature suggests that at least the northern part of the Thomson Orogen is underlain by older pre-Delamerian metasedimentary rocks.  相似文献   

The Hydrochemistry Variations and Carbon Sinks of Groundwater in Xueyu Cave during A Rainstorm, Chongqing, China     

WAGN Xiaoxiao  YUAN Daoxian  XU Shangquan  WANG Fengkang 《《地质学报》英文版》2013,87(Z1):964-965

  相似文献