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红层区城镇地下水对建筑物基础腐蚀及防治研究--以天水市为例 总被引：2，自引：2，他引：0
地下水对建筑物基础腐蚀是发育广泛、速率缓慢的地质灾害,它对红层区城市基础工程危害尤显突出。以天水市的红层区为例,利用长期积累的大量地下水化学资料,探讨了腐蚀性地下水的成因,提出了防治地下水对建筑物基础腐蚀的对策。 相似文献
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本文对天水市区大量地下水水质资料进行了综合分析和研究,初步找出了各种腐蚀性地下水的形成机理和空间分布规律,提出了建筑物地基的安全防护措施. 相似文献
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齐雷 《地质灾害与环境保护》2021,32(1):69-74
为查明温州地区浅层软水化学特征,准确进行腐蚀性评价,基于对区内219个水样化学分析成果数理统计、腐蚀机理与腐蚀环境的分析,进行工程结构腐蚀性验证调查,修正我国岩土规范地下水腐蚀性评价方法中HCO~-_3腐蚀性含量界限值,尝试提出了适用于温州地区的腐蚀性评价标准,并进行区域浅层软水综合腐蚀性评价。研究结果表明:研究区浅层软水分布较广泛,各地貌区占比有显著差异。浅层软水大多数腐蚀性介质含量处于自然低背景的状态,其中HCO_(3)^(-)含量最高。腐蚀性综合评价表明,研究区浅层软水大部分均具有微腐蚀性,只有少部分具有弱腐蚀性,不存在中腐蚀性。 相似文献
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软土深层搅拌桩的水泥土抗腐蚀性室内试验 总被引：10，自引：0，他引：10
结合深港西部通道填海区深层搅拌桩在滨海地下水环境中施工的需要,对水泥土在自来水、地下水、海水及Na2SO4溶液环境下的抗腐蚀性进行了室内研究,研究表明以纯水泥为固化剂的水泥土在腐蚀性地下水环境中的抗腐蚀性能较差,增加矿渣、粉煤灰的含量,能增强水泥土抗腐蚀性;分析了固化剂中矿渣、粉煤灰掺入量对水泥土抗压强度及抗腐蚀性的影响规律,即固化剂掺入比不变的情况下,用矿渣、粉煤灰替代部分水泥能大幅度提高水泥土的抗压强度,同时改善其抗腐蚀性;得出了抗腐蚀性能良好的水泥土配方,即矿渣、粉煤灰的质量占固化剂的40%～60%,可供同类工程借鉴. 相似文献
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对上海某地老厂区土壤和地下水采样、检测,表明土壤重金属元素Cd、As,Pb的含量符合国家《土壤环境质量标准（GB15618-1995）》的一级标准要求,Hg、V、Cu的含量明显受到了污染,Mg、Cd、As、Zn、Pb、Be等金属元素含量水平与本地区的土壤环境背景水平相吻合;地下水中pH、NO3^-,-N,Zn属《地下水质量标准》（GBl4848-93）Ⅰ类,Cl^-和NH3^＋-N属V类,地下水对混凝土无腐蚀性,对钢筋有弱腐蚀性。 相似文献
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本文对河南省区域地下水的水化学特征和类型进行了分区,并浅析了其成因。河南省浅层地下水主要的水化学类型为矿化度≤0.5的重碳酸盐型为主的淡水和矿化度0.5～1.0重碳酸盐型为主的淡水两种,合计分布面积为147 202km~2,占全省面积的88.85%。总硬度小于200mg/L居多,全区地下水以腐蚀性弱为主。基岩山区及山前岗地、地下水强径流带等地区分布低矿化度的重碳酸盐型水,远离山区及地下水径流迟缓地带分布高矿化度重碳酸盐—硫酸盐型水,人类活动强烈的城市区氯化物、硫酸盐型水的比例增加。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931. 相似文献
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正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.) 相似文献
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正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.) 相似文献
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正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.) 相似文献
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正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus., 相似文献
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正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an 相似文献
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正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of 相似文献
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正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37 相似文献
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正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.) 相似文献