对三眼峪泥石流以往防治措施的反思   总被引：1，自引：0，他引：1  

王根龙  张茂省  赵成  胡向德  于国强  曾庆铭 《西北地质》2011,44(3):115-121

“8．8”舟曲特大山洪泥石流灾难惨重,引起国内外工程地质界的广泛关注。调查发现,以往的防治工程在这次特大泥石流中彻底被摧毁,防护能力完全失效,对此应深刻反思,吸取教训。在现场调查的基础上,通过离散元数值模拟和理论分析计算,得出浆砌块石拦挡坝抗泥石流冲压强度不足,泥石流流量与排导工程断面不匹配,排导沟行洪能力严重不足和弯道过多曲率较大等结论。这些问题的思考与认识可作为灾后治理工程方案论证的借鉴。  相似文献   

The Research Advance and Trend Analysis of the Crystallization Cleaning Technology of Salt Lake Brine Pump in China     

GAO Zhenjun  LIU Jianrui  HE Xiaoke  FU Wei 《《地质学报》英文版》2014,88(Z1):418-418

正Salt Lake brine pump is one of the key equipment in salt lake brine extraction device.As the salt lake brine is a kind of high concentration solution with a variety of chemical constituents,the flow and agitation of saturated  相似文献   

冻土层条件下探槽爆破施工技术          下载免费PDF全文

孙宗席 《探矿工程》2014,41(11):70-72,76

介绍了季节性冻土的爆破类型、特点及破碎机理。通过对黑龙江省宝兴沟矿区冻土层下球状药包爆破工艺研究,成功解决了冻土层中探槽爆破施工难题。实践表明,只要根据当地气候、土质等实际情况合理选定爆破参数和技术经济指标,就可以有效控制爆破飞石,降低成本,提高施工效率,取得良好的爆破效果。给出了技术参数和参数指标,可为同类型探槽爆破施工提供参考。  相似文献   

淡斜绿泥石——一种新型牙膏磨擦剂     

赵海鹏 《国土资源》1997,(3)

国内应用的天然矿物牙膏磨擦剂主要是方解石。方解石属三方晶系矿物，以菱面体、板状、柱状存在，因此对牙齿的磨擦值波动较大。淡斜绿泥石属层状硅酸盐矿物，片状形态，硬度比方解石低，做牙膏的磨擦剂显然优于方解石。它不仅对牙齿磨损小，而且具有洁齿、护齿性能。  相似文献   

油基钻井液井筒清洗技术室内研究     

王荐  ;岳前升  ;吴彬  ;舒福昌  ;向兴金 《海洋地质译丛》2008,(4):73-76

油基钻井液在解决南海涠洲12-1油田易垮塌硬脆性泥岩的剥落掉块以及提高钻速、减少井下复杂情况等方面具有较好的应用效果。但是在固井作业完成后,含有钻屑的油基钻井液会牢牢粘附在套管内壁,射孔作业时这些污物将直接影响油井的储层保护效果。因此,室内研制了油基钻井液井筒清洗装置,并开发出针对性的清洗液,该清洗液不仅能对套管内壁上的油膜产生较强的渗透清洗力,并且能防止洗掉的油污造成二次污染,具有较理想的清洗效果,清洗率达90%以上,有效的保护了储层。  相似文献   

Application of FLAC3D in supporting engineering of deep foundation ditch     

Jianhui QIU  Xueda SONG  Yunzheng WANG  Yi ZHENG  Xi YANG .College of Construction Engineering  Jilin University  Changchun  China.Shenzhen Geotechnical Investigation & Surveying Institute Co.Ltd.  Shenzhen  China 《东北亚地学研究》2008,11(4):222-227

Based on the design principles of economic rationality and safety, multiple-pivot pile anchorage approach was used as the supporting engineering of a tall building with a deep foundation ditch. The designs, such as anchor arm, single pile and the whole, were set up in accordance with the calculations of the internal force from the equivalent beam and Yamagata Kunio methods. Moreover, the rationality of the design was estimated using the stability checks. FLAC3D was used for calculating the accuracy of the design. Using FLAC3D to simulating ditch cutting and supporting processes can obtain the equivalent results as the theory analysis in the displacement of ditch surrounding wall, the stress field and stress distribution.  相似文献   

Relationship between age of waste and natural electric potential generation in Sanitary Landfill     

César Augusto Moreira  Antonio Celso de Oliveira Braga  Letícia Hirata Godoy  Diego de Sousa Sardinha 《Geofísica Internacional》2013,52(4):375-383

The geophysical methods are effective tools for determining changes in physical parameters of the geological environment, as soil or groundwater in the presence of contamination. This work consisted on analyzing the natural electric potential obtained over domestic solid waste ditches with controlled closure dates. The interpretation data suggest the generation of electric potential predominantly through the redox phenomenon, as opposed to the flow potential phenomenon. The statistical data analysis indicates a correlation between residence time of the waste and growing variations of voltage. In addition highlights that eight years are required to achieve the reported values for the area with absence of waste, time estimated for decomposition of most organic matter contained in the buried waste.  相似文献   

Large floods,alluvial overprint,and bedrock erosion     

Jens M. Turowski  Alexandre Badoux  James Leuzinger  Ramon Hegglin 《地球表面变化过程与地形》2013,38(9):947-958

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陷落柱定向斜井下套管技术          下载免费PDF全文

王英 《探矿工程》2012,39(4):20-23

介绍了陷落柱地层施工定向斜井下套管前顺孔难点及事故井管处理方法,以及一种简单易行的顺孔管落井事故打捞工具的制做方法。该打捞工具简单、有效,能快速处理大直径井管落井事故,缩短事故处理时间,减少事故造成的损失;提出了与常规下套管存在的差异及其注意事项。为今后施工类似钻孔积累了宝贵经验。  相似文献   

昌马灌区渠道工程冻胀性及防治措施     

丁吉鸿  郑宝平 《水文地质工程地质》2001,28(6):45-47

本文对昌马灌区渠道工程的工程地质问题进行了分析研究，分析了软土渠基的渗漏及冻胀破坏的机制，并提出了具有实际工程意义的治理对策。  相似文献