回填块石土强夯施工工艺的确定及设计优化          下载免费PDF全文

孟宪中  胡先法  王峰  田新元  王中文  王宏沛 《探矿工程》2013,40(11):61-67

以华能莱芜电厂百万机组“上大压小”扩建工程填方区回填块石土强夯地基处理试夯试验为例,比对2个试夯分区采用不同施工工艺施工的质量差别及处理效果,据此查明强夯法的施工质量,确定强夯有效加固深度、土的密实度、变形参数和地基承载力等。根据场地夯填厚度,选取合适的虚填厚度及相应的施工工艺,确定最终施工方案,进一步提高强夯地基处理效果,为最终确定大面积施工所采用的施工工艺提供依据。  相似文献   

基于年龄测试的黄庄—高丽营断裂活动性研究     

王海刚  贾三满  田芳 《城市地质》2013,8(1):32-34

黄庄—高丽营断裂是北京平原区一条重要的活动断裂,在庙城—高丽营段沿线发生地裂缝,造成大量房屋墙体开裂和道路破坏。在西王路村探槽揭示该断裂错断第四系地层,产生地表地裂缝。探糟断裂孢粉年龄测试,该断裂发生年龄大致在13～22ka,仍处于活动状态。  相似文献   

Fault-Growth Pattern of the South Margin Normal Fault of the Yuguang Basin in Northwest Beijing and its Influencing Factors   总被引：4，自引：0，他引：4  

WANG Lin  TIAN Qinjian  LI Dewen  ZHANG Xiaoliang 《《地质学报》英文版》2013,87(3):707-719

Based on high-resolution remote sensing image interpretation, digital elevation model 3-D analysis, field geologic field investigation, trenching engineering, and ground-penetrating radar, synthetic research on the evolution of the Yuguang Basin South Margin Fault (YBSMF) in northwest Beijing was carried out. We found that the propagation and growth of faults most often occurred often at two locations: the fault overlapping zone and the uneven or rough fault segment. Through detailed observation and analysis of all cropouts of faults along the YBSMF from zone a to zone i, we identified three major factors that dominate or affect fault propagation and growth. First, the irregularity of fault geometry determine the propagation and growth of the fault, and therefore, the faults always propagate and grow at such irregular fault segments. The fault finally cuts off and eliminates its irregularity, making the fault geometry and fault plane smoother than before, which contributes to the slipping movement of the half-graben block in the basin. Second, the scale of the irregularity of the fault geometry affects the result of fault propagation and growth, that is, the degree of the cutting off of fault irregularity. The degree of cutting off decreases as irregularity scale increases. Third, the maximum possible slip displacement of the fault segment influences the duration of fault propagation and growth. The duration at the central segments with a large slip displacement is longer than that at the end segments with a smaller slippage value.  相似文献   

Tectonic Taphrogenesis and Paleoseismic Records from the Yishu Fault Zone in the Initial Stage of the Caledonian Movement   总被引：3，自引：0，他引：3  

TIAN Hongshui  ZHANG Zengqi  ZHANG Banghu  ZHU Jiewang  SANG Zhongxi  LI Hongkui 《《地质学报》英文版》2013,87(4):936-947

The Yishu fault zone (mid-segment of the Tanlu fault zone) was formed in the Presinian. Periodic tectonic activities and strong seismic events have occurred along the fault zone. During the initial stage of the Caledonian Movement, with the proceeding of the marine transgression from the Yishu paleo-channel to the western Shandong, uneven thick sediments, composed mainly of sand, mud and carbonates of littoral, lagoon, and neritic facies, were deposited in the Yishu fault zone and western Shandong, and constructed the bottom part of the Lower Cambrian consisting of the Liguan and Zhushadong formations. Through field observations and the lab-examinations, various paleoseismic records have been discovered in the Liguan Formation and the Zhushadong Formations of the Yishu fault zone and its vicinity, including some layers with syn-sedimentary deformation structures that were triggered by strong earthquakes (i.e. seismite, seismo-olistostrome, and seismo-turbidite). Paleoseismic records developed in the Zhushadong Formation are mainly seismites with soft-sediment deformation structures, such as liquefied diapir, small liquefied-carbonate lime-mud volcano, liquefied vein, liquefied breccia, convolute deformation (seismic fold), graded fault, soft siliceous vein, and deformation stromatolite, as well as seismites with brittle deformation structures of semiconsolidated sediments. Paleoseismic records preserved in the Liguan Formation are not only seismo-olistostrome with a slump fold, load structure, and ball-and-pillows, but also seismo-turbidite with convolution bedding, graded bedding and wavy-bedding. However, in the western Shandong area, the closer to the Yishu fault zone, the greater the thickness of the Liguan Formation and the Zhushadong Formation, the greater the number and type of layers with paleoseismic records, and the higher the earthquake intensity reflected by associations of seismic records. This evidence indicates that tectonic taphrogenesis accompanied by strong earthquake events occurred in the Yishu fault zone during the initial stage of the Caledonian Movement, which embodied the break-up of the Sino-Korean Plate along the Paleo-Tanlu fault zone at that time.  相似文献   

Macrofossils from the Permian-Triassic Boundary Strata at Mingtang Section in the Great Bank of Guizhou, Southwest China     

LIANG Lei  TONG Jinnan  SONG Haijun  TIAN Li 《《地质学报》英文版》2013,87(Z1):905-907

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烷基酚的油水分配系数影响因素研究     

孙砚泽  彭晓波  文志刚  何文祥  严刚  刘栩  钟鸣  田伟超 《地质力学学报》2022,28(2):217-225

烷基酚是一类由酚类化合物烷基化后产生的化合物,与其他非烃化合物相比,更易溶于水.文章通过不同温度(25℃、45℃和65℃)、 不同盐水浓度(4000 mg/L、6000 mg/L和8000 mg/L)和不同原油类型(X37、X45和X61)的三组油水分配实验,研究了烷基酚在油水两相间的分配特征,确定了烷基酚分配系数的变...  相似文献   

察尔汗盐湖别勒滩区段晶间卤水的主要离子分布特征   总被引：2，自引：2，他引：2       下载免费PDF全文

田润  韩凤清  马海州  刘勇平  高东林  张西营 《盐湖研究》2007,15(3):7-13

通过野外采集样品、室内实验分析,研究了察尔汗盐湖别勒滩区段晶间卤水的主要离子分布特征。采集了53个晶间卤水样品,通过分析,发现K+浓度一般随着深度的增加而减小,Li+浓度一般随着深度的增加而增加,Mg2+浓度随着深度增加浓度也在增加,但异常情况同样存在。Li+,B2O3在空间分布上有一个富集区域,越是远离这一区域离子含量就越低;K+含量则存在两个临界点,在临界点附近相关离子浓度和矿化度会变化。  相似文献   

南极普里兹湾海冰厚度的电磁感应探测方法研究   总被引：1，自引：0，他引：1       下载免费PDF全文

郭井学  孙波  田钢  王帮兵  张向培 《地球物理学报》2008,51(2):596-602

本文介绍一种由EM31-ICE型电磁感应仪和激光测距仪组合而成的船载电磁感应海冰厚度探测系统. 针对海冰和海水的电学特征,运用电磁感应技术提取探测系统至海冰下底面的距离,运用激光测距仪测量冰面粗糙度和探测系统至海冰上表面的距离,两组数据结合,实现了海冰厚度的探测. 通过南极现场探测数据分析,并与钻孔实测冰厚数据对比研究,定量分析了探测系统距离冰面的高度效应,建立了该系统冰厚测定值随高度变化的修正关系式,并对船载航行数据进行了系统校正. 与SCAR ASPeCt的冰厚数据对比分析,表明该系统能够获得可靠的海冰厚度并具有较高的精度,且能满足对极区大范围海冰厚度观测的需求.  相似文献   

华北太行山区地壳各向异性的接收函数证据   总被引：13，自引：6，他引：7       下载免费PDF全文

田宝峰  李娟  王卫民  赵连锋  姚振兴 《地球物理学报》2008,51(5):1459-1467

采用具有任意方向对称轴的横向各向同性介质系统,探讨了各向异性介质中接收函数表现出的横波分裂、能量偏离等特征,并系统剖析了各向异性介质对称轴方位角、倾角以及各向异性层位分布对接收函数方位变化花样的影响.太行山隆起地区是研究华北克拉通构造运动以及动力学过程的重要场所.我们以该地区JJJX台为例,介绍了利用远场接收函数研究台站下方地壳各向异性特征的方法.反演结果表明,该台站下方存在明显的来源于中、上地壳的各向异性,浅层2.4 km以内表现出强度约为10%的裂隙成因的慢轴型各向异性,裂隙面沿NNE方向展布,与该地区断层走向一致;中地壳表现出强度约为8%的晶体成因的快轴型各向异性,太行山新生代的隆起是形成晶体优势排列方向的一种可能的动力机制.  相似文献   

接收函数方法估计Moho倾斜地区的地壳速度比   总被引：5，自引：3，他引：2       下载免费PDF全文

张洪双  田小波  滕吉文 《地球物理学报》2009,52(5):1243-1252

造山带地区的复合力系作用往往使Moho界面发生变形,局部表现为倾斜状态.为了得到这些区域精确地壳速度比结构,本文基于H-κ方法发展了H-κ-θ方法.该方法不仅考虑了倾斜Moho层的响应,同时利用径向和切向接收函数信息,增加了对扫描的约束.利用该方法对青藏高原东南缘地壳厚度和速度比结构进行研究,结果表明：研究区内地壳明显存在不均匀性,松潘—甘孜地体平均地壳厚度约为60 km,四川盆地西缘约为47 km,扬子地台约为43 km,三江块体和扬子地台东南缘已接近正常地壳厚度;松潘—甘孜地体与扬子地台相邻部位地壳平均地震波速度比（V_p/V_s）普遍偏高,且四川盆地西侧发现一绕盆地边缘的弧形高V_p/V_s异常区（>1.88）,我们推测该异常可能由青藏高原向东逃逸的地壳流体受到高强度的四川盆地阻挡,在其西侧堆积所致.  相似文献