桩土荷载传递的测试分析和模型研究   总被引：15，自引：2，他引：15  

徐松林  吴玉山 《岩土力学》1996,17(2):42-52

在滑动测微计测得３根桩的轴向应变的基础上，分析了桩的荷载传递性状。提出非线性弹簧片组合模型，对实测Ｐ－Ｓ曲线进行拟合．取得了较好的结果。  相似文献   

混凝土中锚杆荷转传递机理的理论分析和现场实验   总被引：11，自引：0，他引：11  

杨松林  荣冠  朱焕春 《岩土力学》2001,22(1):71-74

从理论和实验两方面分析了混凝土中锚杆受张拉荷载时的传力机理，指出了两者结果产生明显差别的原因以及理论的适用范围，并通过对实验结果的讨论，阐明了锚杆表面形态对混凝土与锚杆交界面抗剪强度的决定作用。  相似文献   

玛沁-靖边剖面S波资料研究与探讨   总被引：8，自引：3，他引：8       下载免费PDF全文

刘宝峰  李松林  张先康  张成科  赵金仁  任青芳  海燕 《地震学报》2003,25(1):82-88

对玛沁——靖边剖面深地震测深S波资料处理解释，获得本区S波二维地壳速度结构和波速比结构．结果表明，该区S波二维速度结构和波速比结构，沿剖面存在着明显的差异．剖面西段和海原地区下方呈现S波速度偏低，而波速比偏高的结构特征；剖面中段和东段的S波速度和波速比正常．根据S波速度结构和波速比结构的横向变化特征，讨论了两大异常区岩性的变化．推测海原大地震孕育发生不仅与构造活动有关，而且与该区的岩石性质有关．   相似文献   

Research on the Occurrence of Titanium in Coal-Measure Kaoline in Songyi, Hubei     

RanSonglin ShenShangyue ChengXianzhong 《中国地质大学学报(英文版)》2004,15(4):361-364

Using X-ray diffraction (XRD) analysis and an electron-probe microanalyser (EPMA), this research found that the main independent mineral of titanium (Ti) in the kaoline of Songyi is anatase. The granularity of anatase is from 0.5 um to 1.5 um, and some exceed 10 um. This research provides important scientific evidence for the exploitation of the coal-measure kaoline in the Sooth China.  相似文献   

柯克巴斯套古火山机构及其原始熔岩湖的漂浮产物     

张安  丁天府  李嵩龄 《岩石学报》1988,4(4)

柯克巴斯套古火山机构是新发现的一个中心式陆相古火山构造。形成时代为早二叠世末期。喷发产物主要为酸性熔岩,按岩性结构特征及产状的不同,由内向外可分中心火山颈相、熔岩湖相、爆发相、火山脉岩相等四个火山岩相。在原始熔岩湖相中发育大量各种原始熔岩湖漂浮产物,其结构形态独特,在空间上作有规律的展布,较充分地反映了古火山机构的喷发环境和原始熔岩湖存在的自然面貌。  相似文献   

PC—E500机用于地籍测量自动化     

付子傲  张松林 《测绘学院学报》1995,(3)

本文介绍了ＰＣ—Ｅ５００机地籍测量常用程序的功能，以及该机与全站仪、个人微机、打印机、绘图仪、数字化仪等设备联机使用的方法。说明了ＰＣ－Ｅ５００在实现数据记录、存贮、计算处理和成果输出的自动化方面所起的作用。  相似文献   

Crustal structure of mainland China from deep seismic sounding data   总被引：18，自引：0，他引：18  

Songlin Li  Walter D. Mooney  Jichang Fan 《Tectonophysics》2006,420(1-2):239

Since 1958, about ninety seismic refraction/wide angle reflection profiles, with a cumulative length of more than sixty thousand kilometers, have been completed in mainland China. We summarize the results in the form of (1) a new contour map of crustal thickness, (2) fourteen representative crustal seismic velocity–depth columns for various tectonic units, and, (3) a Pn velocity map. We found a north–south-trending belt with a strong lateral gradient in crustal thickness in central China. This belt divides China into an eastern region, with a crustal thickness of 30–45 km, and a western region, with a thickness of 45–75 km. The crust in these two regions has experienced different evolutionary processes, and currently lies within distinct tectonic stress fields. Our compilation finds that there is a high-velocity (7.1–7.4 km/s) layer in the lower crust of the stable Tarim basin and Ordos plateau. However, in young orogenic belts, including parts of eastern China, the Tianshan and the Tibetan plateau, this layer is often absent. One exception is southern Tibet, where the presence of a high-velocity layer is related to the northward injection of the cold Indian plate. This high-velocity layer is absent in northern Tibet. In orogenic belts, there usually is a low-velocity layer (LVL) in the crust, but in stable regions this layer seldom exists. The Pn velocities in eastern China generally range from 7.9 to 8.1 km/s and tend to be isotropic. Pn velocities in western China are more variable, ranging from 7.7 to 8.2 km/s, and may display azimuthal anisotropy.  相似文献   

How High Are the P-T Conditions for Paleoproterozoic Metamorphism of the Huangtuling Felsic Granulite, North Dabieshan, Central China？   总被引：1，自引：0，他引：1  

陈能松  龚松林孙敏  杨勇刘嵘 《中国地质大学学报(英文版)》2006,17(4):291-301

This paper is supported by the Special Doctoral Grant of the Ministry of Education of China （No. 98049114） and the National Natural Science Foundation of China （No. 49972023）.  相似文献   

3D Visualization of Landslide Deformation     

ZHANG Kun ZHANG Songlin 《地球空间信息科学学报》2007,10(1):67-70

The deformation of landslide is usually expressed in horizontal and vertical direction separately. Based on the X, Y, Z coor-dinates from a real monitoring project, a method to build three-dimensional(3D) model of landslide by constructing triangulated ir-regular network (TIN) and extruding contour lines is proposed. The almost imperceptible displacements of monitoring points are zoomed by two kind of exaggerating methods. The deformation process is replayed using 3D animation technique.  相似文献   

天山-阿尔泰东部地区海西晚期后碰撞铜镍硫化物矿床:主要特点及可能与地幔柱的关系   总被引：28，自引：0，他引：28  

毛景文  Franco PIRAJNO  张作衡  柴凤梅  杨建民  吴华  陈世平  程松林  张长青 《地质学报》2006,80(7):925-942

天山—阿尔泰东部地区是中国重要的铜镍成矿区,近年来针对区内的铜镍矿床和相关岩体的研究不断取得进展,找矿也取得了一系列新突破,已经探明了十几个矿床和矿点。笔者基于以往研究成果,结合目前地质勘查和找矿评价的新进展,比较详细地全面总结了后碰撞铜镍硫化物矿床的基本特点、成矿规律和成矿过程,并建立了描述性成矿模型。这些矿床沿一组平行的走向近东西的深大断裂分布,与成矿有关的镁铁质—超镁铁质杂岩体一般不大于5km2,小的可为一个岩墙。矿化分两种类型:通道型和熔离型。成矿时代为298~270Ma,为中亚成矿带大规模成矿期的组成部分,形成于后碰撞伸展阶段。与这组铜镍硫化物矿床有关的镁铁质—超镁铁质杂岩体可能是早二叠世大面积喷溢岩浆的残留根部或通道部分,可能与地幔柱活动有关。另外,针对区内的地质特征,结合以往找矿的成功经验,对区内进一步的找矿工作提出了一些设想和建议。  相似文献