影响钻孔灌注桩成桩质量的工艺因素

分析了影响钻孔灌注桩成桩质量的桩孔超径、泥浆性能、桩头出现的杂质砼、砼的可灌性等因素,同时提出了解决问题的办法,且从砼的配制到灌注均提出了具体看法,供讨论。     

大陆科学钻探施工用钻探技术和施工战略

国外实施大陆科学钻探采用的钻探技术有地质岩心钻探技术，石油钻探技术，组合式钻探技术，以及前苏联和俄罗斯的具有鲜明特色的科学深钻技术，分别介绍了它们各自的技术特点及优缺点，并介绍了科学深孔和超深孔的2种施工战略，即超前孔裸眼钻进方法和双孔方案。     

提高旋流除砂器净化泥浆效果的试验研究

从分析单粒岩屑受力情况出发，研究了旋流除砂器的工作机理，指出了其中心部位出现的涡旋气柱将对泥浆净化效果产生显著影响。提出了可手动或自动调节结构参数的旋流除砂器改进设计，通过关于临界粒度、最小泥浆损耗量和预防排砂口堵塞的实验，验证了新型除砂器的净化效果非常了，尤其在西部缺水地区具有推广价值。     

地层压力预测技术及其在油层保护中的应用

简述了随钻监测、钻后检测、钻前预测和模拟等地层压力预测的技术的特点及其应用范围。介绍了有效应力法预测地层压力的原理及参数的求取方法。应用有效应力法地层压力预测软件为胜利油田压敏型地区提供了近200口探井的地层压力预测剖面，从实钻结果看，地层压力预测的符合率高，根据预测压力来平衡钻井，起到了保护油气层的良好效果。     

施工工艺对钻孔灌注桩垂直承载力的影响分析

介绍了钻孔灌注桩垂直承载力受力机理及施工中成孔，清孔和砼灌注等工序对单桩垂直承载力的影响，并提出提高单桩垂直承载力应采取的技术措施。     

强夯接触力和接触位移的碰撞分析求解

首次采用大变形动力接触有限元法分析了强夯对地基土的冲击碰撞过程 ,锤底接触力和夯沉量过程中直接求得 ,且能模拟夯锤与地基土的多次接触分离过程 ,适应于各种复杂的地基土条件和夯击能条件 ,克服了现有其它方法的不足和缺陷。文章最后给出了系列工程算例 ,验证了本文计算模型的合理型     

The accurate location of the injection-induced microearthquakes in German Continental Deep Drilling Program

Introduction The scientific drilling belongs to the International Lithosphere Program and is one of the four lithospheres explorations. So far there are more than ten countries, which have taken the scientific drilling. The German Continental Deep Drilling Program was later than the others and is the sec-ond deep drilling, but is the most significant scientific super deep drilling in the world. The Ger-man Continental Deep Drilling Program (Kontinentales Tiefbohrprogram der Bundesrepub…     

定向对接井技术在金坛盐矿的应用

定向对接井采卤工艺是利用现代定向钻井特殊工具、仪器、测试装置使钻头沿设计的井身轨迹钻达指定靶区,从而达到两井建糟连通的一种水溶采卤先进技术。     

火星浅层钻探和取样技术分析

分析了地球与火星钻探技术的差异,介绍了美国火星钻探取样技术的现状,研究了火星表面环境特征与钻进的关系,进而从宇宙飞船有效载重对钻探取样系统质量的限制、动力的限制、运输体积的限制、岩性、孔性及其他岩石特性、冻土等方面进行了研究,分析了火星浅层钻探和取样技术的特点以及需要解决的关键问题.     

Self-weight consolidation and compaction of sediment in the Yellow River Delta,China

Extensive studies of land subsidence in the Yellow River Delta (YRD) have identified sediment consolidation and compaction as important contributors to geologic processes. Although previous studies were informed by detailed knowledge of subsurface getechnical properties and depositional history, geotechnical data that are sufficient for detailed modeling are still unavailable for much of the delta. To overcome this limitation, we use a modified Monte Carlo method to model the incremental sedimentation and compaction in the delta and identify the stratigraphic characteristics of all abandoned lobes in the delta on a short-term scale of decades. A Digital Elevation Model (DEM) of the thickness of the delta plain is generated based on a contour map of the delta using Geographic Information Systems technology. Combining our simulation results and the DEM creates an overall view of the delta’s temporal and spatial land subsidence characteristics. Most data from the 152 boreholes show properties of soft soil, which is saturated and compressible. Our data confirm that the most rapidly compacting strata contain 100% soft soil. Research on settlement from soft soil compaction is particularly important because of the widespread distribution of soft soil in the YRD.