旋挖钻机聚合物泥浆施工技术浅探

通过对聚合物泥浆护壁机理的分析,简要叙述了聚合物泥浆的性能特点,为在旋挖钻孔工艺中应用聚合物泥浆,总结了聚合物泥浆的制备、回收、净化、排放方法,优化了施工时泥浆循环系统的布置方案。结合工程实践,指出了旋挖钻进时应注意的问题和对一些易出现问题的处理方法,对旋挖钻机应用聚合物泥浆施工时具有一定的指导意义。     

旋挖钻进技术在澳门地下重型停车场工程中的应用

澳门地下重型停车场工程地段属人工堆填整平的山丘地形，地层结构从上而下为杂填土、冲积沙层、风化程度不同花岗岩带，使用旋挖钻机进行钻孔灌注桩施工时，因地层岩性因素，易出现漏浆、孔壁坍塌及埋钻事故。通过选用适岩性不同的钻头、合理埋设钢护筒位置、调配性能适宜的泥浆及规范混泥土灌注流程，保证了旋挖钻机在成孔过程中孔壁的稳定性，解决了塌孔埋钻问题，提高了钻孔灌注桩的成孔效率。     

旋挖钻机在海南东方电厂桩基施工中的应用效果

通过海南东方电厂一期工程基础施工实例,介绍了旋挖钻机施工的工艺方法及措施,并对旋挖钻机与SPJ-300型钻机的施工成本及效果作了对比。     

关州水电站防渗墙泥浆净化回收利用实践

关州水电站位于较为偏僻的丹巴县境内,工程所在地没有合格的粘土,只能使用外运的膨润土作为防渗墙固壁泥浆的原料,工程成本很高。冲击钻机施工防渗墙的泥浆净化回收利用存在较大的难度。因此进行了冲击钻机施工防渗墙的泥浆净化回收利用技术的研究,应用效果良好,显著节约了泥浆成本。     

软土地区提高旋挖钻机成孔质量的措施

针对某高架桥工程采用旋挖钻机在软土层钻进中发生的孔口坍塌、缩径、钻头打滑、孔底沉渣厚度大等情况,进行了原因分析,并采取了加长护筒、改进钻头结构、优化钻进工艺、气举反循环清孔、泥浆净化等针对性措施,取得了良好的效果,确保了工程质量,提高了施工效率,施工经验可供类似工程参考。     

钻井泥浆助剂市场调查与预测

泥浆助剂是石油、地质钻探上一种极为重要的辅助材料,在钻探过程中它的主要性能是完成携带岩屑、冷却钻头,保护井壁和平衡地层压力。通常以比重、粘度和切力来表示这些性能指标。泥浆助剂产品系列多,品种极为复杂,常用有双聚合、钾聚合、PAC、三磺、腐植酸钾等系列     

岩土工程施工废泥浆固化技术研究

岩土工程废泥浆的治理是文明施工的一个亟待解决的迫切问题。分析了岩土工程废泥浆对环境污染和对施工条件的影响，对废泥浆治理技术进行了评述，重点介绍了高炉矿渣固化工程废泥浆的初步研究成果。     

国内外泥浆材料的现状及发展趋势

系统介绍了泥浆材料的现状及发展趋势，重点叙述了水基泥浆、油基泥浆及合成基泥浆这3大类泥浆材料的现状及发展趋势。     

静态泥浆护壁的湿式旋挖工法的应用

介绍了旋挖钻机采用静态泥浆护壁的湿式旋挖工法在阿尔及利亚桩基施工中的应用以及在施工过程中出现的一些实际问题的处理办法。     

应用于丹麦海岸铺管工程的钻进液系统

本文介绍了在丹麦的一项用于光缆安装工程的水平定向钻进泥浆系统,对泥浆使用的必要性、泥浆的性能和泥浆处理设备进行了论述。     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

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.     

GEOPHYSICS

正20140634 Cao Lingmin(Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Xu Yi Finite Difference Tomography of the Crustal Velocity Structure in Tengchong,Yunnan Province(Chinese Journal of Geophysics,ISSN0001-5733,CN11-2074/P,56(4),2013,p.1159-1167,6illus.,35refs.,with English abstract)     

PALEOBOTANY

正20140965Jia Gaowen(School of Earth Sciences,Lanzhou University,Lanzhou 730000,China);Liu Kenan Pod and Leaflet Fossils of Dalbergia(Leguminosae)from the Upper Miocene of Lincang,Yunnan Province(Acta Palaeontologica Sinica,ISSN0001-6616,CN32-1188/Q,52(2),2013,p.213-222,6     

NONMETALS DEPOSITS

正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.)     

PROSPECTING EXPLORATION

正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.)     

STRUCTURAL GEOLOGY

正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se-     

MATHEMATICAL GEOLOGY

正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology,     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141664 Abudoukerimu Abasi(Kashi Meteorological Bureau of Xinjiang,Kashi 844000,China);Wang Rongmei The Relationship with Woody Plants Phonological Variation Characters and Climatic Change from 1982to 2010in Kashi(Quaternary Sciences,ISSN1001-7410,CN11-2708/P,33(5),2013,p.927-935,8illus.,3 tables,48 refs.,with English abstract)     

GEOTHERMICS GEOLOGY

正20140958 Mei Huicheng(No.915GeologicalBrigade,Jiangxi Bureau of Geology and Mineral Resources,Nanchang 330002,China);Li Zhongshe Geological Features and Causes of the Huihuang Geotherm in Xiushui,Jiangxi Province(Journal of Geological Hazards and