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岩土工程勘察是开展飞机维修机库工程项目设计施工建设的基本条件。本文在分析了盐碱地层机库地基岩土工程勘察目的、依据和方法的基础上,详细阐述了工程场地的地层结构、岩土特性、地下水等工程地质条件,对建筑场地类别、抗震地段划分、抗震设防烈度、设计基本地震加速度和设计地震分组等进行地震效应评价,并结合岩性特征、物理力学性质指标及动力触探试验结果等对地基稳定性进行了综合评价,旨在为盐碱地层岩土工程勘察提供参考借鉴。 相似文献
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武汉地铁二号线一期工程岩土工程勘察特点分析 总被引：4，自引：1，他引：4
通过对武汉市轨道交通二号线一期工程沿线区域地质构造、工程地质和水文地质特点的分析,说明了在不同地貌单元和不同地质条件下针对地铁施工工法、进行岩土工程勘察的基本内容和方法,指出了地铁勘察在场地条件、勘察要求、试验内容等方面不同于一般的工业与民用建筑岩土工程勘察工作的特点,并据此合理安排勘察实施方案。 相似文献
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根据峰峰矿区工业及民用建筑的岩土工程特征,以及在岩土工程勘察中所遇到的诸如由地形地貌产生的不良工程地质现象、特殊地质体等问题,认为在岩土工程勘察中,不仅要研究勘察场地的工程地质条件,而且要重视周围地质条件的宏观研究,同时建议建立岩土工程勘察档案数据库,为今后岩土工程勘察成果的使用、以及正确确定勘察手段奠定基础。 相似文献
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在复杂的工程地质条件下,由于岩土体地质特征在空间分布及其连续性变化大,如何选用合理、经济的手段进行岩土工程勘察是非常重要的.本文通过工程实例讨论了地质雷达技术在类似条件下进行岩土工程勘察中的有效应用,该项技术以其高分辨率和图象的实时表现等优势,将其与地质钻探方法相结合、同时采用合适的工作流程可以有效地查明地下介质结构信息的空间组合及其变化特征,为岩土工程特征的合理评价提供重要信息,使勘察工作获得事半功倍的效果. 相似文献
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水文地质在岩土勘察中应用比较广泛。为提高岩土工程勘察准确性和效率,以勘察中的水文地质工作为重点,通过对地下水在岩土工程勘察中的影响,岩土勘察中的自然地理、地质条件、地下水位和隔水层勘察等内容,提出应加强水文地质专业学习,提高勘察能力,为工程建设提供更有力的数据支持。 相似文献
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工程勘察外业的基本内涵及常见法律风险概述
《建设工程勘察设计管理条例》第二条规定:"本条例所称建设工程勘察,是指根据建设工程的要求,查明、分析、评价建设场地的地质地理环境特征和岩土工程条件,编制建设工程勘察文件的活动."《岩土工程勘察术语标准》 (JGJ/T84-2015)第2.0.2条规定:"岩土工程勘察,为解决岩土... 相似文献
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Planning Geotechnical Investigation Using ANFIS 总被引：2，自引：2，他引：0
Bojan Žlender Primož Jelušič Djamalddine Boumezerane 《Geotechnical and Geological Engineering》2012,30(4):975-989
Engineering experience may be written in mathematical form by using adaptive network-based fuzzy inference system (ANFIS). In this article we propose a method to use engineering experience and build a model, which can be used as a systematic decision support tool for engineers dealing with new problems. Planning geotechnical investigations is based on experience, which are used to obtain optimal number of investigation points, field and laboratory tests. To achieve this objective we define minimum number of investigation points and several input parameters which could increase or decrease the number of investigation points. The expert’s evaluations were put in a table, from which we generate the basis of the system. The paper presents a concept for planning geotechnical investigation for buildings using ANFIS and practical examples show its usefulness. 相似文献
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基坑开挖中的环境岩土工程问题研究 总被引：10，自引：0，他引：10
基坑工程是一涉及岩土工程、结构工程和环境工程等众多学科领域的综合工程,基坑工程往往是在城市中心地带建筑密集区进行,基坑工程的建设,不仅受周围环境的限制,也对周围环境会造成不同程度的影响,因此,研究基坑开挖中环境岩土工程地质问题有重要意义.本文分析了基坑开挖中环境岩土工程地质现象的主要类型,探讨了这些类型之间的有机联系和环境岩土工程地质现象变异的危害,并提出了基坑开挖中预防环境岩土工程地质现象发生的途径与措施. 相似文献
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Rambhatla G Sastry Sumedha Chahar Manohar N Viladkar 《Journal of Earth System Science》2018,127(5):62
For conjunctive use of geoelectric imaging and geotechnical site investigations in geotechnical characterization of major civil engineering construction sites, an objective assessment of influencing factors is important. Here, we present multiple regression analyses of both geoelectric (Electrical Resistivity Tomography, ERT; Induced Polarization Imaging, IPI) and geotechnical site investigations (Standard Penetration Test, SPT) for two profiles at a construction site for CGEWHO Complex in Greater Noida region, Delhi to assess the role of influencing formation factors like sand, fines and water content. Achieved results show that SPT ‘N’ and IPI are well predicted by a linear multiple regression. On an average, the nonlinear regression has improved predicted SPT ‘N’, resistivity and chargeability by 28.55%, 22.45% and 9.58%, respectively. The influence of sand and fines content is more than that of water content in the prediction of chargeability and SPT ‘N’. RMS error is less in prediction of IPI chargeability (average error of 1.96%) in comparison to SPT ‘N’ value (average error of 11.35%). As factors affecting chargeability (IPI) and SPT ‘N’ are similar, non-invasive IPI can be used along with few geotechnical site investigations for detailed geotechnical site investigations. 相似文献
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Kita-Uebaru natural rock slope failure and its back analysis 总被引：3，自引：2，他引：1
A large landslide occurred in Kita-Uebaru (or Asato) area of Nakagusuku village in Okinawa Island (Japan) on 10 June 2006
after a rainy period of about 9 days. The total rainfall was 126 mm from June 8 till the time of the landslide this period.
This landslide destroyed several buildings and roads, and the total travel distance of the landslide was about 110 m. In this
article, the authors were concerned with the initiation conditions of Kita-Uebaru landslide and post-failure motions of the
landslide body. The observations made in the landslide area, structural geology analyses and outcomes of geotechnical investigations
are described first. Then, possible causes of the landslide are investigated through back analyses using as inputs the geological
structure and the strength properties of planes of discontinuities involved in the sliding processes. The final part of the
article is concerned with the simulation of post-failure motions of the landslide body. The results of the investigations
and back analyses indicate that the failure plane was bi-planar and the heavy torrential rainy period for about 3 days was
the main cause of initiation of the landslide. The mechanical model presented in this article was capable of capturing the
overall features of the landslide body following the initiation of the failure. 相似文献
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G.M.E. Kamh 《Environmental Geology》2005,48(4-5):625-638
The weathering factors act on the recent and archaeological sites through different processes based on the dominant environmental
conditions. The net result of weathering is deformation of the original form of construction rock. In the current case study,
the main aim is to find out the mechanism of formation of two different weathering forms recorded on many old buildings taking
Chester City as a case study. The construction rock in the case study is arenitic sandstone with carbonate content ranging
from 0.0 to 15.6%. The sandstone blocks are cemented together by hydraulic lime mortar that can easily be altered chemically
to salts by acid rain that dominates at the study area. In case of mortar with worse geotechnical limits than the sandstone
blocks, the net result is convex “domal” shape blocks, but in case of mortar with better geotechnical limits than the construction
sandstone, the net result of weathering is tafoni “concave” weathering form. 相似文献
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In urban areas where there has been continuous occupation of the land for centuries, there are likely to be large areas of filled ground. Fills may have arisen inadvertently from the rubble of demolished buildings and the slow accumulation of refuse. Old urban fills of this type may contain soil, rubble, refuse and even whole parts of past constructions. Despite the fact that areas covered with such deposits are generally prone to severe problems, especially under conditions of dynamic loading, still their influence, as a foundation material on the seismic behaviour of modern buildings is practically unpredictable.Thessaloniki is an old historical city of Macedonia, Greece with no less than 2300 years of continuous urban evolution. A thick and heterogeneous layer of artificial deposits covers the biggest part of the historical centre of the city, as is the case for many old historical cities. The presence of this extensive formation influences the urban development, as it constitutes the foundation of the majority of the buildings of the historical centre, and its investigation is essential for most of the major constructions proposed. The complexity and heterogeneity of Thessaloniki's fill makes the assessment of its engineering behaviour a rather complicated task. This is due to the big range of values of accumulated geotechnical data but also to the fact that these data have been produced by unrelated methods and applied tests.The aim of this paper is to assess the engineering performance of Thessaloniki's fill based on its behaviour as foundation material to a major seismic event. This is carried out by the evaluation of the influence of engineering geological parameters to the damage distribution of the 1978 earthquake, based on the official database which recorded the condition of all the buildings of the historical centre. The statistical elaboration of the damage distribution was carried out following a classification scheme for the fill, based on the fill's classes produced by this scheme, the fill's thickness and the combination of both.The results are given in terms of damage ratios i.e. the ratios of the number of buildings in each damage status per total number of buildings inspected. The correlation of the engineering response with the thickness of the fill showed that there is a significant increase of the percentage of damaged buildings with increasing thickness. However, further analysis of these results showed that the above increase does not apply to all classes equally, which actually suggests that different parts of the fill behave differently in respect to the fill thickness. These results clearly show that a classification scheme and the determination of the boundary conditions should be used as a combined tool from an engineering geological point of view, in order to form a basis for the better understanding of the engineering behaviour of such deposits, the interpretation of geotechnical data and the design of more sophisticated investigations. 相似文献
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Fathi M. Shaqour Ghaleb Jarrar Steve Hencher Mostafa Kuisi 《Environmental Geology》2008,55(8):1777-1783
Marls and marly limestone deposits cover most of Northern Jordan, where Amman City and its suburbs are located. These deposits
serve as foundations for most buildings and roads as well as fill material for structural back filling, especially road bases
and sub-bases. The present study aims at investigating the geotechnical characteristics and mineral composition of the marl
units of these deposits through field investigations and laboratory testing. Using X-ray diffraction technique along with
chemical analysis, representative samples of marl horizons were tested for mineral composition, and for a set of index and
geotechnical properties including: specific gravity, grain size, Atterberg limits, Proctor compaction and shear strength properties.
The test results show a positive linear relationship as expected between the clay content and both liquid and plastic limits.
The tests results also show an inverse linear relationship between the clay content and the maximum dry density in both standard
and modified compaction. This is attributed to the adsorption of water by the clay minerals. The relationship is more prominent
in the case of modified compaction test. The results also indicate a similar relationship for the angle of internal friction.
No clear correlation between cohesion and clay content was apparent. 相似文献
18.
Assessment of a coastal landslide subjected to building loads at Sinop, Black Sea region, Turkey, and stabilization measures 总被引：1，自引：0，他引：1
《Engineering Geology》2004,75(1):69-88
The large landslides along the Black Sea shore in Turkey are well-known instability phenomena and responsible for considerable economic losses each year. The severity of the problem increased particularly in recent years as increased scarcity of land forced utilization of inherently unstable areas. In 1988, severe rainstorms at the city of Sinop on the Black Sea shore triggered ground movements on a gentle coastal slope subjected to building loads and caused extensive damage to buildings founded on the slope. Comprehensive investigations of the failure were carried out and used to establish a geotechnical model for the slide. The model allowed consideration of building loads and different groundwater conditions. In addition, the model studies were complimented by limit-equilibrium and finite-element stress analyses. The results indicated movements on a circular sliding surface through stiff clay. The toe of the landslide is located at the shoreline and remains active. The failure was probably initiated by rising groundwater level combined with surcharge loads imposed by buildings on the slope. Other contributing factors include sand extraction and coastal erosion. Remedial works are recommended involving a rockfill buttress at the toe of the slide and drainage improvements on the surface of the slope. 相似文献
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进入９０年代以来,上海的建（构）筑物迅速向高、大、深、重的方向发展,从而使地下工程的试验、研究、设计、施工和监测,成为上海岩土工程界的主攻方向。在软土地基上进行桩基旋工、开挖深基坑和沉井工程,都会对软弱土体产生扰动和破坏,推动稳定性的土体所表现的应用应变复杂过程,随时都会给工程带来危害。上海岩土工程界从众多工程事故实例中取得经验教训,摸索到一套行之有效的办法,对于常见的上海地下工程技术问题,从原理 相似文献
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地基不均匀性的定量评价工作量大,手工计算相当繁琐。以ExcelVBA为工具,依据《高层建筑岩土勘察规程》（JGJ7—2004）,编制了地基不均匀性定量评价的ExcelVBA程序,评价结果的Excel表格可直接作为工程文档。 相似文献