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黄石市某金矿在扩建过程中，斜副井+8m处水平井筒底板突然被地下水冲穿，地层中大量泥、砂、砾石和井筒底板形成泥石流沿斜井下冲，造成重大事故。该矿与研究单位协商，决定修复副井，工程分地面注浆加固和井内修复注浆加固两步进行，并把地面注浆加固工程交付我队施工。地面注浆加固工程，是利用岩心钻探手段成井，然后把水泥及其添加剂强行注入裂隙，以改善地面地基的物理力学性质和抗渗性能。工程共计施工7个钻孔，其中直孔5个，斜孔2个。直孔除按灌浆要求，钻进中不许使用泥浆作冲洗液外，其它规范与平常岩心钻探相同。 相似文献
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复合注浆法是将静压注浆法和高压旋喷注浆法进行时序上的结合，分别发挥两种注浆加固方法各自的优点，又可克服各自的技术和工艺缺陷的一种基础加固新方法，它可以较好地对既有建筑物地基和新建建筑基础出现质量问题进行加固处理。简述了复合注浆法的加固作用机理、设计及计算模型，在此基础上通过工程实例介绍其施工技术并分析其加固效果和经济性。 相似文献
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注浆法在填土地基加固处理中的应用实例 总被引：3，自引：0，他引：3
泸溪县武溪110kv变电站场地地基为人工开挖山坡堆填而成，填土厚薄不均，由块石、碎石及粉土构成。变电站建成后，建筑物及地面发生不均匀沉降，建设方要求进行加固处理，经过反复对比和投资验算，确定采用充填、渗透注浆法对填土地基注入浓水泥浆进行加固处理。施工前，先要进行注浆试验，选择合理的注浆方式和技术参数。注浆加固后，通过一年多的观察，建筑物及地面不均匀沉隆均得到控制，达到了提高地基承载力，稳定建筑的目的。 相似文献
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运用三维有限差分软件FLAC3D对破裂井筒的各种治理措施进行了数值模拟,分析评价了钢圈加固和喷射混凝土套壁、壁后注浆、地面注浆、开设卸压槽等各治理措施的工程效果。结果表明,钢圈加固和喷射混凝土套壁强度相对较小,适合紧急的抢险处理和防止破裂混凝土坠落,难以维持井壁的长期稳定;破壁注浆措施在一定程度上控制了井壁与土层相对位移的增大,防治井筒破裂效果良好,且预防性壁后注浆效果更为突出;地面注浆防治效果明显,在注浆孔数量不变的条件下,孔位的合理选择对保证地面注浆防治效果至关重要;卸压槽可以有效吸收纵向变形以抑制破裂井壁的发展,其开设在破裂处上部时,效果最好。分析结果可用于指导破裂井筒治理的设计与施工 相似文献
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静压注浆在房屋基础加固中的应用 总被引：3，自引：0，他引：3
由于房屋基础下覆地基存在软弱层，临近桩基施工抽水所引起的地基不均匀沉降导致房屋出现开裂现象，通过静压注浆的方法将地基进行加固，阻止裂隙了的发育，并将地面抬高，使裂纹有所吻合，取得较好的效果。 相似文献
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注浆技术在封堵地下涌水和加固岩体工程中应用甚广，利用钻孔成桩技术是在地面注浆基础上发展起来的，对地基进行处理而形成的一种注浆法。它将注浆技术与钻孔桩放了工技术相结合，应用于基坑挡土桩施工的压浆成桩新工艺，发展了现行传统桩基础施工法。 相似文献
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青纸汽运办公由于部分基础座落在松散的杂填土层上，产生不均匀沉降破坏，通过劈裂注浆加固，建筑物停止沉降，地基土承载力标准值提高了4倍，效果显著。加固劈裂注浆法是治理既有建筑地基基础沉降灾害的有效方法之一。 相似文献
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芦岭煤矿中央风井因生产不允许井筒内施工注浆孔，而改用实施井筒地面帷幕注浆堵水的方法，由于正确的选择注浆参数、注浆设备、注浆浆液和注浆工艺，取得了明显的经济效益和社会效益。 相似文献
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Guboglo M. N. 《GeoJournal》1980,4(1):53-58
International unity is becoming ever stronger in this country owing to an increasing similarity in the development of the cultural environment. This comprises the provision of all the country's republics with a sufficient number of schools, theatres, and other institutions and cultural information media in accordance with the needs of the population. An important part is played by the rise in ‘the general educational level, as well as the level of professional qualifications and skills. Among all the Soviet nations and nationalities, this rise being more rapid among formerly backward peoples. Prominent among the factors of internationalization is the progressive development of the nationalities’ cultural resources, while professional culture is being increasingly brought within the reach of the masses.The implementation of the nationalities policy promotes the all-round development of all Soviet nations and nationalities, their drawing together, the upsurge of the individual capabilities of every Soviet citizen. 相似文献
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Jiayu Rong Michael Melchin S. Henry Williams Tatyana N. Koren Jacques Verniers 《《幕》》2008,31(3):315-318
The Global Stratotype Section and Point （GSSP） for the base of the Silurian System was defined in 1985. Since that time, a number of researchers have suggested that this section has serious deficiencies for use as a GSSP. As a result, in 2000, the Subcommission on Silurian Stratigraphy （SSS） proposed undertaking a formal restu@ of this GSSP, which was subsequently approved by the International Commission of Stratigraphy （ICS）. The result of this restudy was the formal proposal that the current GSSP, at 1.6 m above the base of the Birkhill Shale, at Dob＇s Linn, Scotland, should be maintained as the same locality and stratigraphic level, but the bios- tratigraphical definition of the boundary should be revised. The previously defined, basal Silurian grapto- lite zone, the Parakidograptus acuminatus Zone, should be subdivided into a lower Akidograptus ascensus Zone and a higher E acuminatus Zone. The base of the A. ascensus Zone, marked by the first appearance of A. ascensus, should be regarded as the biostratigraphic mark for the base of the Silurian. This proposal has now been formally approved by the SSS and ICS, and ratified by International Union of Geological Sciences. This is the first GSSP to undergo formal restudy and redefini- tion, and the proposal also included a recommended procedure for restudy of GSSPs. 相似文献
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Deviation of the major axis of the inertia ellipsoid of the Moon from the direction toward the Earth
B. P. Kondratyev 《Astronomy Reports》2017,61(8):709-714
It is known from observations that the center of mass of the Moon does not coincide with the geometric center of its figure, and the line connecting these two centers is not aligned with the direction toward the center of the Earth, instead deviating toward the Southeast. This stationary deviation of the axis of the inertia ellipsoid of the Moon to the South of the direction toward the Earth is analyzed. A system of five linear differential equations describing the physical libration of the Moon in latitude is considered, and these equations are derived using a new vector method taking into account perturbations from the Earth and partly from the Sun. The characteristic equation of this system is obtained, and all five oscillation frequencies are found. Special attention is paid to the fifth (zero) frequency, for which the solution of the latitude libration equations are stationary and represents a previously unknown additional motion of the rotational axis of theMoon in a cone with a small opening angle. In contrast to the astronomical precession of the Earth, the rotation of the angular-velocity vector is in the positive direction (counter-clockwise), with the period T 3 = 27.32 days. On this basis, this phenomenon has been named “quasi-precession.” This quasi-precession leads to a stationary inclination of the major axis of the inertia ellipsoid of theMoon to the South (for an observer on Earth), making it possible to explain one component of the observed deviation of the center of mass of the Moon from the direction toward the Earth. The opening angle of the quasiprecession cone is approximately 0.834″. 相似文献
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Important tendencies in development of the world mineral-resources sector at the beginning of the 21st century were an increase in production and consumption of mineral materials differentiated by types of metals and nonmetallic mineral raw materials, by countries and regions, as well as the concentration of the production of mineral raw materials in a small number of countries, and a reduction in industrial reserves of minerals in the world economy, even at the current stage of their extraction. These tendencies should be taken into account in working out a strategy for development of the Russian mineral raw-material base. 相似文献
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Fouad N. Ibrahim Dr. 《GeoJournal》1988,17(1):133-141
Taking the example of W Sudan, an analysis of the climatic incidents leading to the two recent famine disasters is made. On this natural background, the human side is investigated. Focus is directed towards the fragile economic structure of the famine-prone population groups. An early-warning system for famine in the Sahelian Zone is proposed taking grain production and storage, livestock development and the relationship between the prices of livestock and grain as major indicators. 相似文献
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东濮凹陷北部沙三中亚段广泛发育盐岩和烃源岩,这两个看似不能共存的物质却在这里互层共生。该时期研究区沉积特征为多盐韵律与多层烃源岩互层共生、连续沉积,单个盐韵律厚度从几米到十几米,烃源岩有机质丰度高、类型好。平面上,两者在湖盆沉积沉降中心共生;垂向上,高有机质丰度、好干酪根类型与高盐度地层具有较好的对应关系。因而成为恢复古气候和古环境的重要研究对象。通过岩石学、古生物学以及Sr/Ba、B/Ga、(V+Ni+Mn)、Fe/Mn、Sr/Cu、Mg/Ca、V/(V+Ni)、稀土元素含量和氯同位素等方法对凹陷北部沙三中亚段的沉积环境进行研究。结果表明,凹陷北部沙三中亚段为深水沉积的还原环境,古盐度较高,达到半咸水-咸水沉积;微量元素和孢粉化石特征表明研究区沙三中亚段为温暖潮湿的环境。 相似文献
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郯庐断裂南段研究进展与断裂性质讨论 总被引：13，自引：3，他引：13
据1：5万区域地质调查和专题研究资料，就郯庐断裂带是否南延与消失的原因，其与大别—苏鲁造山带交截形成的假位错效应，以及与中新生代沉积盆地形成演化的关系等作了新的阐述。在此基础上，讨论了郯庐断裂带是否为巨大的左行平移断层或转换断层。认为郯庐断裂带可能是在“古郯庐带”的基础上于早侏罗世重新活动、白垩纪强烈活动的地堑型枢纽断裂带。 相似文献
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The Importance of the Precipitation and the Susceptibility of the Slopes for the Triggering of Landslides Along the Roads 总被引：3，自引：1，他引：2
Clemente Irigaray Francisco Lamas Rachid El Hamdouni Tomás Fernández José Chacón 《Natural Hazards》2000,21(1):65-81
In order to characterise the influence of the heavyrains on the observed landslides during the 1996–1997hydrological cycle, rainfall records for the last 100years are analysed from 104 stations in easternAndalusia. Regarding the amounts of rain recordedbetween October 1996 and March 1997 in the 104stations studied, 31 presented new all-time records;15 presented values that were 80–100% of thepre-1995 record; 49 stations, 80–50%; and 9stations, < 50%. A map has been devised of thesusceptibility of the materials through which thesouth-eastern Andalusian road network crosses,together with an inventory of the damage caused byinstability phenomena on banks and cuttings of theroad network during the winter of 1996–1997. Therelationships between the rainfall during the studyperiod, the damage caused to the road network and thesusceptibility of the materials affected are analysed.The results indicate that there is a clearcorrespondence between the rainfall recorded and thesusceptibility of the materials with the inventorieddamage. It is concluded that the widespread seriousdamage caused in early 1997 to the roads andsurrounding areas in the Alpujarra region and thecoast of the Province of Granada was mainly caused bythe extraordinarily heavy rains. However, considerablyless damage was observed where the susceptibility ofthe terrain is low, thus highlighting the extremeusefulness of terrain-susceptibility maps for riskprevention and territorial planning. 相似文献