近地铁结构地连墙施工技术可行性分析与应用

随着城市经济建设的飞速发展,城市地下空间开发项目日益增多。工程施工中经常遇到紧邻地下建筑物进行开挖、钻进等情况,特别是地下连续墙这样较大面积深层开挖的工法,势必会对原有地下建筑造成一定影响,稍有不慎,便会造成安全质量事故。结合工程实例,简要介绍了地下连续墙在上海市某紧邻地铁结构基坑工程中的应用。通过可行性分析,采取相关的施工过程控制措施使其在施工过程中对地铁结构的变形影响达到最小,实践证明了该法对同类复杂工程的适应性。     

Geochemical evidence of ions’ sources and influences of meteorological factors on hydrochemistry of glacier snow meltwater in the source region of the Yangtze River

The risk management of cascade reservoir systems (CRSs) is a major public challenge, and the establishment of risk criteria is critical to solving this iss     

恩洪-老厂地区煤层气成藏条件研究

煤层气盆地、煤层气系统、煤层气区带的存在及发育程度是煤层气藏形成的充分与必要条件。恩洪盆地和老厂一圭山盆地老厂煤矿区具备了形成煤层气藏的条件。研究其形成煤层气藏的特定条件，总结其煤层气藏模式，是煤层气勘探目标评价的基础。     

福州、小陶地震速报技术研究

本文通过分析福州、小陶地震的波形记录及各种定位参数 ,总结了该地区的震相特征和各台的震级情况 ,结合地震速报的规程 ,提出了对这两个地区地震速报的建议。     

兖州矿区煤中某些微量元素的赋存状态研究

微量元素的赋存状态决定其在煤的加工利用过程中释放的难易程度和毒性，弄清其在煤中的赋存状态，对准确评价元素的工艺性能、环境影响、作为副产品的可能性以及在地质意义上都是十分重要的。分析了微量元素在煤中的有机亲合性，采用数理统计方法，求得了微量元素与煤中有机显微组分、三态硫、灰分之间的相关性，并在浮沉实验的基础上，分析了微量元素的存在状态，通过研究向知，Ge、Ga、U、V、Cu、Th、Pb和Zn主要以无机态存在于煤中，F和Cl可能以有机态存在为主，As无机态和有机态存在的机率相似。     

An experimental study of effect of pre‐existing fabric on deformation of foliated mylonite at high temperature and pressure

We performed deformation experiments on a foliated mylonite under high temperature and pressure conditions in this study. To investigate the effect of pre‐existing fabric on the rheology of rocks, our samples were drilled from natural mylonite with the cylinder axis parallel to the foliation (PAR) and perpendicular to the foliation (PER). We performed 25 tests on seven PAR samples and 21 tests on seven PER samples at temperatures ranging from 600 to 890 °C, confining pressures ranging from 800 to 1400 MPa, and steady‐state strain rates of 1 × 10⁻⁴, 1 × 10⁻⁵ and 2.5 × 10⁻⁶ s⁻¹. In the temperatures of 600–700 °C, the deformation is accommodated by semi‐brittle flow, with the average stress exponent being 6–7 assuming power law flow; in the temperature range of 800–890 °C, deformation is mainly by plastic flow, with an average stress exponent of n = 3 and activation energies of Q = 354 ± 52 kJ/mol (PER and PAR samples). The experimental results show that the strengths of PER samples are higher than those of PAR samples. Deformation microstructures have been studied by optical and electron microscopy. The original foliation of PER samples is destroyed by deformation and replaced by a new foliation, but the deformation of PAR samples followed the original foliation. Electron backscatter diffraction (EBSD) measurements show a strong lattice preferred orientation (LPO) of the quartz c axis fabrics of the starting samples and deformed PER and PAR samples. However, the c axis fabric of quartz in experimentally deformed PER and PAR samples varied with temperature and strain rate is different from that seen in the starting mylonite sample. The initial quartz c axis fabric of the starting mylonite sample has been transformed into a new fabric during experimental deformation. Dehydration melting of biotite and hornblende occurred in both PER and PAR samples at temperatures of 800–890 °C. Copyright © 2014 John Wiley & Sons, Ltd.     

Preliminary Analysis of the Relationship between the Magnitude Deviation of the Station and Site Response in the Fujian Digital Seismic Network

Using the records of 3,069 regional earthquake events from the Fujian Digital Seismic Network from October 2008 to December 2015,in which the magnitude of each of the events was measured by at least six stations,statistics are taken on the deviation between the magnitude of a single station and the average magnitude of the network. It is found that the magnitudes average deviation of each station is-0. 31-0. 68. Statistics are also taken for the period corresponding to the maximum amplitude of the record measured in each station for calculating the magnitude,and the dominant period gained is 0. 06s-0. 38s; site response of each seismic station is inverted using the Moya method,and it is found that the site response of 98 stations is in the bands of 1-20 Hz,suggesting that the site has an amplifying or suppressing effect on the signals in certain frequency bands;Considering the site response corresponding to the inherent 0. 8s period of the WoodAnderson pendulum seismograph,and comparing the magnitude deviation caused by the site response corresponding to the dominant period time of each station with the average magnitude deviation, we obtain that there is a good linear relationship between the magnitude deviation from the dominant period site response and the average deviation of the magnitude of each station,indicating that the magnitude deviation of a single station has a close relationship with the site response of the period corresponding to the maximum amplitude measured for calculating the magnitude.     

云南开远南洞地下河水质演变特征

在云南开远南洞地下河出口,连续19年采取旱、雨季水样进行水质变化监测,结果表明: ( 1)整体上地下水水质旱季好于雨季,历年旱季水质类型以良好为主,雨季则以较差为主; ( 2)水质变化阶段性明显: 1987— 1993年,离子浓度普遍较低,旱、雨季波动不大,水质多属Ⅰ 、Ⅱ 类,有机污染以NH+4 、NO-3 等为主; 1994—2000年,旱、雨季离子浓度均普遍升高且变化加剧, N H+4 、As、Cd、Cr、Mn出现历年最大值,金属离子污染日趋加剧,水质以Ⅱ 、Ⅲ 类为主; 2001— 2005年,旱、雨季离子浓度有升有降,以升为主, Pb、Zn、Cl- 、SO2-4 出现历年最大值,水质以Ⅱ 、Ⅲ 类为主。南洞地下河水质19年来发生了较大的变化,污染日趋严重。分析认为该地下河水质逐步变差与上游补给区盆地内经济发展状况密切相关。为此,提出了采用自动监测等方法加强地下河动态变化监测研究以及实行分区、分级管理等水质保护的具体对策建议。      

多尺度生态资产遥感综合测量的技术体系

着重论述了如何建立多尺度生态资产遥感综合测量的技术体系，具体包括以下主要内容：①如何建立一整套生态资产遥感监测、野外抽样调查以及监测结果质量控制的技术标准与规范；②并在此基础上，设计出生态资产遥感测量的技术规程、主要研究内容以及野外抽样调查与检验方案；③通过建立生态资产遥感测量和野外抽样测量与检验的集成系统，实现系统的业务化运行。     

桂林地区第三纪有孔虫的发现及其意义

<正>地质矿产部岩溶地质研究所古生物组在桂林盆地尧山西侧的朝阳砖厂、江头村等地的一套黄灰色和浅黄色的泥质粉砂岩或粉砂质泥岩(该套岩性层理发育)中,发现较多的有孔虫化石,经中国地质科学院地质研究所王乃文同志的初步鉴定有如下属种: Ammonia sp.,Bathysiphon cf. areacea Cushman,Cyclammina Complanata,Caribeanella cf. katasensis(ujiié),Caribeanella aff,katasensis(ujiié),Caribeanella sp.,Gyroidinoides? sp.,Nodellum sp.,Nonion sp.,Orbulina sp.,Protelphidium sp.,Trochamminoides cf. proteus (Karrer),Trocham