增加曲线模型在路基沉降预测中的应用研究

增加曲线模型自身的特点，决定了它能很好地拟合一级荷载下的地基沉降．时问曲线，这已得到了验证。将其引入到多级填土荷载下的软土路基沉降的预测中，提出了相应的预测数学模型，并通过工程实例予以验证。其结果表明：与传统的针对多级荷载的指数曲线模型以及双曲线模型相比，该模型的理论更为充分，其预测结果也更接近实际，具有一定的工程实用价值。     

无单元法在高速公路沉降计算中的应用研究

无单元法是一种新型数值计算方法，它只需要节点相关信息就能建立离散模型。笔者首先介绍了不等阶多项式基的径向点插值法基本理论，接着将其应用到分级施工下的软基高速公路断面沉降计算中，推导出此类问题的系统矩阵方程，并与有限元法解进行了分析对比.结果表明：该法不但计算精度高，而且在求解路堤分级施工的这类移动边界问题的沉降时，比有限元法更方便，故在工程实践中将具有广阔的应用前景。     

盐源—丽江构造带是新生代陆内造山带

盐源-丽江构造带处于扬子大陆与青藏特提斯的结合部,其造山时代的确定,不仅对正确认识该区的构造性质与发展历史及指导矿产勘查有重要意义,而且有助于判定印度-欧亚板块碰撞事件对欧亚板块内部影响的广度和深度。通过系列构造-成矿测年,结合地层、构造、岩浆活动、成矿作用的综合研究,证实盐源-丽江构造带是新生代陆内造山带,而不是印支造山带。其造山作用主要发生于中-晚始新世之交的喜马拉雅期,与欧亚-印度板块碰撞触发的扬子大陆岩石圈向青藏特提斯岩石圈俯冲有关,表现为地壳多层次拆离、剪切和沉积盖层的滑脱、褶皱和推覆,属陆内造山,系印度-欧亚板块碰撞事件的一种远程效应。     

三元体系K^＋，Mg^2＋／B4O7^2- -H2O25℃相关系研究

对三元体系K+,Mg2+/B4O2-7-H2O 25℃的溶解度进行了研究,该体系属简单共饱型,两段溶解度曲线对应于体系的两种原始组分K2B4O7·4H2O、MgB4O7·9H2O的结晶区,共饱点组成为K2B4O7 13.96%,MgB4O7 0.53%.     

激发极化法在砚山阿空锰矿区的应用

以激发极化法中梯度装置为主，结合激电测深，在云南砚山阿空锰矿区获得较好找矿效果。     

声波CT技术的应用

文章通过3个实例,说明声波CT技术在工程勘查、金属矿探测、油气储层描述领域中的实际应用效果.     

On the Kinematic Characteristics and Dynamic Process of Boundary faults of the Nansha Ultra-crust Layer-Block

The Nansha ultra-crust layer-block is confined by ultra-crustal boundary faults of distinctive features, bordering the Kangtai-Shuangzi-Xiongnan extensional faulted zone on the north, the Baxian-Baram-Yoca-Cuyo nappe faulted zone on the south, the Wan'an-Natuna strike-slip tensional faulted zone on the west and the Mondoro-Panay strike-slip compressive faulted zone on the east. These faults take the top of the Nansha asthenosphere as their common detachmental surface. The Cenozoic dynamic process of the ultra-crust layer-block can be divided into four stages: K2-E21, during which the northern boundary faults extended, this ultra-crust layer-block was separated from the South China-Indosinian continental margin, the Palaeo-South China Sea subducted southwards and the Sibu accretion wedge was formed; E22-E31, during which the Southwest sub-sea basin extended and orogeny was active due to the collision of the Sibu accretion wedge; E32-N11, during which the central sub-sea basin extended, the Miri accretion     

A Large-Scale Palaeozoic Dextral Ductile Strike-Slip Zone:the Aqqikkudug-Weiya Zone along the Northern Margin of the Central Tianshan Belt,Xinjiang,NW China

The nearly E-W-trending Aqqikkudug-Weiya zone, more than 1000 km long and about 30 km wide, is an important segment in the Central Asian tectonic framework. It is distributed along the northern margin of the Central Tianshan belt in Xinjiang, NW China and is composed of mylonitized Early Palaeozoic greywacke, volcanic rocks, ophiolitic blocks as a mélange complex, HP/LT-type bleuschist blocks and mylonitized Neoproterozoic schist, gneiss and orthogneiss. Nearly vertical mylonitic foliation and sub-horizontal stretching lineation define its strike-slip feature; various kinematic indicators, such as asymmetric folds, non-coaxial asymmetric macro- to micro-structures and C-axis fabrics of quartz grains of mylonites, suggest that it is a dextral strike-slip ductile shear zone oriented in a nearly E-W direction characterized by "flower" strusture with thrusting or extruding across the zone toward the two sides and upright folds with gently plunging hinges. The Aqqikkudug-Weiya zone experienced at least two stages of ductile shear tectonic evolution: Early Palaeozoic north vergent thrusting ductile shear and Late Carboniferous-Early Permian strike-slip deformation. The strike-slip ductile shear likely took place during Late Palaeozoic time, dated at 269(5 Ma by the40Ar/39Ar analysis on neo-muscovites. The strike-slip deformation was followed by the Hercynian violent S-type granitic magmatism. Geodynamical analysis suggests that the large-scale dextral strike-slip ductile shearing is likely the result of intracontinental adjustment deformation after the collision of the Siberian continental plate towards the northern margin of the Tarim continental plate during the Late Carboniferous. The Himalayan tectonism locally deformed the zone, marked by final uplift, brittle layer-slip and step-type thrust faults, transcurrent faults and E-W-elongated Mesozoic-Cenozoic basins.     

基于1 km网格的北京暴雨洪涝灾害风险区划

目前许多城市暴雨洪涝灾害综合风险区划对暴雨在复杂地形下可能引发的山洪与地质灾害造成的高风险以及对城市交通安全风险估计不足,同时常规的气象观测资料已难以描述暴雨致灾危险性精细化分布。本文基于自然灾害风险评估理论,利用遴选的293个北京气象自动站2006—2017年逐时降水观测资料、北京2015年1∶25万基础地理信息、2016年Landsat8晴空遥感影像、灾情资料以及网格化的社会经济资料,在承灾体暴露度基础上充分考虑了承灾体对暴雨引发的城市积涝、山洪与地质灾害灾损敏感性差异,从暴雨致灾危险性、孕灾环境敏感性、承灾体易损性3个方面开展了北京地区暴雨灾害1km分辨率的精细网格化风险评估与区划,并结合实际案例进行了分析。结果显示:(1)基于高密度降水观测资料提取的网格化短历时暴雨频次和暴雨量能较为精细地评估致灾危险性;基于遥感与GIS提取的不透水盖度、地形起伏度与河网密度可有效评估暴雨洪涝孕灾环境敏感性;基于1km格网化的GDP、人口密度和路网密度以及灾损敏感系数可有效评估暴雨引发的积涝、山洪与地质灾害对人员、财产和公路交通的易损性;(2)与已有成果比较,本次北京暴雨洪涝风险区划不但凸显了暴雨对城市的积涝风险,也凸显了暴雨引发的山洪与地质灾害风险,同时突出了暴雨对城市交通设施安全的影响;(3)风险区划结果基本反映了北京市暴雨灾害的潜在风险,北京暴雨洪涝灾害防御的重点区域应放在风险较高的三个区域。     

季风与贵州的雨季

本文利用1944—1962年气象资料,对贵州季风特征和雨季情况,进行了初步的分析研究,提出了划分雨季标准和季风分类的意见,并初步确定了贵州季风进退和雨季始止日期。对季风与自然天气季节以及季风与贵州旱涝的关系,也作了初步的整理,以供日常中长期天气分析预报的参考。