沪蓉高速柴家湾隧道围岩稳定性分析及支护效果研究

隧道围岩的应力分布及变形特征对保证其长期稳定性具有关键的作用。本文以柴家湾隧道为例进行实态建模,通过采用有限元软件ANSYS对其施工全过程进行了三维弹塑性数值模拟计算。研究结果表明,隧道拱顶和拱脚处应力集中现象明显,局部可能出现拉应力;变形主要集中在拱顶、拱腰部位,衬砌单元所受内力在规定强度范围以内,支护措施合理有效。     

四川地质遗迹区划研究

《四川省地质遗迹景观调查评价》项目根据四川地质遗迹景观的空间分异和区域地质地貌特征,划分出四大地质遗迹区,再以其分布规律,景观形成时间、空间和成因的关联性划分出20个地质遗迹分区和28个地质遗迹小区,从而建立了四川地质遗迹景观区划系统。     

GIS在四川城市环境地质调查评价中的应用

将GIS应用于四川城市环境地质调查评价,建立一套完整的标准,指导全省21城市的数据库建设工作。在数据库的基础上利用MAPGIS二次开发平台,集成四川城市环境地质问题调查评价信息系统,供地方政府和各级管理机构使用。     

误差熵的估计问题研究

指出了具有复杂分布的随机量的总体熵的估计问题,首次给出了估计熵的最小截断误差限.推导了样本熵的近似估计公式,引入最优窗宽、全局最优窗宽的算法,首次解决了样本熵的估计值不惟一的问题.     

鄂尔多斯盆地靖边气田马五_(1+2)气藏储集单元研究

综合地震、地质、测井等信息,考虑沉积、成岩、地貌、生产动态等多因素,在沟槽识别和致密带研究基础上,通过井间干扰、油层压力变化和试井边界响应分析,按照局部、就近原则对靖边气田马五1+2气藏进行了储集单元划分。共划分出111个储集单元,其中独立型69个,复合型42个。这些储集单元的面积多介于10～50km2之间,单个储集单元的井数一般少于6口。在对气藏储层特征综合认识的基础上,确定流动单元划分思路与流程,并认为关键环节包括古沟槽识别、致密带研究、动静结合确定储集单元等3个方面。储集单元一方面受控于被致密岩相包围的有利成岩相带,宏观上与弱—中等充填泥粉晶白云岩相对应性好;另一方面又受各级古沟槽夹持,在两个一级古沟槽之间往往共生多个储集单元,而这些储集单元边界又严格地受二级或三级沟槽切割控制。     

基于LOD的选取模型应用于电子地图多尺度显示的研究

从电子地图多尺度显示角度出发,提出了基于LOD的选取模型。在选取模型中将显示比例尺和地图比例尺的比值作为LOD算子,总结了LOD算子设置的3个层次,以及分类、分级、要素和空间几何特征等LOD算子的设置规则。     

Pore pressure profiles in fractured and compliant rocks1

Fluid permeability in fractured rocks is sensitive to pore-pressure changes. This dependence can have large effects on the flow of fluids through rocks. We define the permeability compliance γ= 1/k(k/δp_p)_pc, which is the sensitivity of the permeability k to the pore pressure p_p at a constant confining pressure p_c, and solve the specific problems of constant pressure at the boundary of a half-space, a cylindrical cavity and a spherical cavity. The results show that when the magnitude of permeability compliance is large relative to other compliances, diffusion is masked by a piston-like pressure profile. We expect this phenomenon to occur in highly fractured and compliant rock systems where γ may be large. The pressure profile moves rapidly when fluids are pumped into the rock and very slowly when fluids are pumped out. Consequently, fluid pressure, its history and distribution around injection and production wells may be significantly different from pressures predicted by the linear diffusion equation. The propagation speed of the pressure profile, marked by the point where δp_p/δx is a maximum, decreases with time approximately as and the amplitude of the profile also dissipates with time (or distance). The effect of permeability compliance can be important for fluid injection into and withdrawal from reservoirs. For example, excessive drawdown could cause near-wellbore flow suffocation. Also, estimates of the storage capacity of reservoirs may be greatly modified when γ is large. The large near-wellbore pressure gradients caused during withdrawal by large γ can cause sanding and wellbore collapse due to excessive production rates.     

Die Rheingrabenrandverwerfung im Wattkopftunnel bei Ettlingen (Nordschwarzwald)

The Wattkopftunnel, near Ettlingen (Nordschwarzwald), drives through the eastern margin of the Rheingraben. The tunnel passes cenozoic and mesozoic sediments. Early quarternary and tertiary beds are situated west of the main thrust of the Rheingraben. Fossil record indicates upper Oligocene age (Chatt) for parts of the tertiary sediments. At the eastern border of the Rheingraben, wedges of jurassic and middle triassic series are squeezed. East of the Rheingraben the tunnel drives in the lower triassic Bausandstein. The eastern margin of the Rheingraben was investigated in detail during tunneling. Faults of the Rheingraben margin are distributed in an 130 meter wide fault zone in the tunnel. Total stratigraphic separation by the normal faults reaches more than 2 000 meters. The cenozoic sequence suffered synsedimentary to early diagenetic deformation, while the mesozoic series are characterized by ruptural deformation. The fault- and joint system is directed in the rheinische Richtung (SSW-NNE). East of the Rheingraben a second direction occur, running parallel to the lower Albtal (W-E).

     

三黄通泻合剂治疗脂源性胰腺炎30例临床观察

目的：观察三黄通泻合剂灌肠治疗脂源性胰腺炎（HLP）的临床疗效。方法：将60例HLP患者随机分为治疗组和对照组,每组各30例。对照组予以西医常规治疗,治疗组在对照组的基础上加用三黄通泻合剂灌肠治疗。比较2组腹痛缓解时间、首次排便时间,治疗前后的C反应蛋白（CRP）、三酰甘油（TG）水平及平均住院时间。结果：治疗组腹痛缓解时间、首次排便时间、平均住院时间均较对照组短（P<0.05）,且2组CRP、TG水平治疗前后组内比较及治疗后组间比较,差异均有统计学意义（P<0.05）。结论：三黄通泻合剂可以快速缓解患者腹痛及便秘等症状,显著抑制炎症反应,快速降低TG水平,缩短住院时间,总体疗效显著,值得临床推广。