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Journal of Earth Science 2024年

作者： Sha Lu Huiming Tang liangqing wang Xuexue Su Bing Lü Badong National Observation and Research Station of Geohazards China University of Geosciences Faculty of Engineering China University of Geosciences Wuhan China

The reservoir landslide undergoes periodic saturation-drying cycles affected by reservoir fluctuation in hydropower project area， leading to the irreversible impact on the landslide materials. Sliding zone is the shearing part in formation of landslide and controls the further development of landslide. The mechanical behavior of sliding zone soil under compression is a crucial factor in the stability analysis in landslide. In this paper， the sliding zone soil from a giant landslide in the biggest hydropower project area， Three Gorges area， is taken as the research case. The particle-size distribution of the sliding zone soil from this landslide is studied and fractal dimension is adopted as representation. Periodic saturation-drying is introduced as the affecting factor on sliding zone soil properties. The triaxial compression test is conducted to reveal the mechanical behavior of the soil， including stress-strain behavior， elastic modulus， failure stress and strength parameters. These behavior of sliding zone soils with different fractal dimensions are studied under the effects of periodic saturation-drying cycles. The normalized stress-strain curves are displayed for further calculation. The data considering saturation-drying cycles are obtained and compared with the experimental results.

关键词：

Experimental investigation on shear strength deterioration at the interface between different rock types under cyclic loading

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3063-3079页

作者： Qiong Wu Zhiqi Liu Huiming Tang liangqing wang Xiaoxue Huo Zhen Cui Shiyu Li Bo Zhang Zhiwei Lin Faculty of Engineering China University of GeosciencesWuhan430074China Guangxi Fangchenggang Beitou Environmental Protection Water Co. Ltd.Fangchenggang538021China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

The shear strength deterioration of bedding planes between different rock types induced by cyclic loading is vital to reasonably evaluate the stability of soft and hard interbedded bedding rock slopes under earthquake;however,rare work has been devoted to this subject due to lack of *** this study,experimental investigations on shear strength weakening of discontinuities with different joint wall material(DDJM)under cyclic loading were conducted by taking the interface between siltstone and mudstone in the Shaba slope of Yunnan Province,China as research objects.A total of 99 pairs of similar material samples of DDJM(81 pairs)and discontinuities with identical joint wall material(DIJM)(18 pairs)were fabricated by inserting plates,engraved with typical surface morphology obtained by performing three-dimensional laser scanning on natural DDJMs sampled from field,into mold *** shear tests were conducted on these samples to study their shear strength changes with the cyclic number considering the effects of normal stress,joint surface morphology,shear displacement amplitude and shear *** results indicate that the shear stress *** displacement curves under each shear cycle and the peak shear strength *** number curves of the studied DDJMs are between those of DIJMs with siltstone and mudstone,while closer to those of DIJMs with *** peak shear strengths of DDJMs exhibit an initial rapid decline followed by a gradual decrease with the cyclic number and the decrease rate varies from 6%to 55.9%for samples with varied surface morphology under different testing *** normal stress,joint surface morphology,shear displacement amplitude and shear rate collectively influence the shear strength deterioration of DDJM under cyclic shear loading,with the degree of influence being greater for larger normal stress,rougher surface morphology,larger shear displacement amplitude and faster shear rate.

关键词： Discontinuities with different joint wall material(DDJM) Discontinuities with identical joint wall material(DIJM) Cyclic shear test Shear strength deterioration Joint surface morphology Shear displacement amplitude Shear rate Normal stress

Long-term in-situ monitoring of anchoring system and preliminary analysis of monitoring data

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Journal of Earth Science 2024年

作者： Luobin Zheng Huiming Tang liangqing wang Changdong Li Chengren Xiong Zongxing Zou Chenlu wang Lingfeng Zhu Yifan Zhang Faculty of Engineering China University of Geosciences Badong National Observation and Research Station of Geohazards China University of Geosciences

The geological environment in which the reservoir slope is situated is intricate， influenced by factors such as precipitation and fluctuations in reservoir water levels. Furthermore， the anchoring structure embedded within the rock mass of the slope undergoes corrosion and deterioration due to these factors， resulting in a highly complex interaction process between the slope rock mass and the anchoring structure. The long-term safety of rock-anchored structure systems is closely tied to the construction and safe operation of reservoirs， as both internal and external factors play a role in ensuring their stability. The present study aims to investigate this intricate issue by designing and establishing an on-site comprehensive multi-field information monitoring platform. The multi-site information monitoring platform comprises three components， namely the landslide monitoring system， anchor structure monitoring system， and data management system. The landslide monitoring system encompasses the surveillance of surface deformation， subsurface deformation， and environmental factors. The monitoring system for anchor structures includes the monitoring of prestress， anchor cable strain， and corrosion status of steel bars. The establishment of a preliminary system for data transmission and management has been accomplished. The current monitoring results indicate that the health condition of the tested anchor cables is satisfactory， and the strain and corrosion status are influenced by the design of the anchor cable structure. The platform is currently undergoing enhancements with the incorporation of cutting-edge anchoring structure design and monitoring equipment.

关键词：

Effects of the Tensile and Shear Properties of Bolts on the Shear Properties of Bolted Rock Joints

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Journal of Earth Science 2022年

作者： Chenlu wang Luobin Zheng liangqing wang Linfeng Zhu Shanbai Wu Shan Deng Faculty of Engineering China University of Geosciences

The mechanical properties of bolts are important factors affecting the shear behavior of bolted joints. In this study, tensile and pure shear tests were conducted on five kinds of bolts made from different materials to measure their tensile and shear parameters. Direct shear tests were conducted to analyze the effects of tensile and shear strength parameters on the shear behavior of bolted *** test results showed that the mechanical properties of bolts made from different materials were clearly different and that these differences mainly affected the plastic deformation stage of the bolted joints. The larger the bolt elongation was, the larger the joint shear displacement at bolt failure. The tensile and shear strengths of the bolts were positively correlated with the shear strength of the bolted joints. According to the standard regression analysis, the bolt shear strength had a greater influence than the bolt tensile strength on the bolt contributions when the bolts were perpendicular to the joint surface. Based on the empirical equation for the bolt contribution proposed by Spang, the maximum shear loads in the pure shear test were introduced, and a new equation was established to predict the contributions of bolts. The prediction results obtained using the modified equation were in good agreement with the experimental results.

关键词：

Investigation on the Indeterminate Information of Rock Joint Roughness through a Neutrosophic Number Approach

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Computer Modeling in Engineering & Sciences 2021年第11期129卷 973-991页

作者： Changshuo wang liangqing wang Shigui Du Jun Ye Rui Yong Institute of Rock Mechanics Ningbo UniversityNingbo315211China Faculty of Engineering China University of GeosciencesWuhan430074China Department of Civil Engineering Shaoxing UniversityShaoxing312000China

To better estimate the rock joint shear strength,accurately determining the rock joint roughness coefficient(JRC)is the first step faced by researchers and ***,there are incomplete,imprecise,and indeterminate problems during the process of calculating the *** paper proposed to investigate the indeterminate information of rock joint roughness through a neutrosophic number approach and,based on this information,reported a method to capture the incomplete,uncertain,and imprecise information of the JRC in uncertain *** uncertainties in the JRC determination were investigated by the regression correlations based on commonly used statistical parameters,which demonstrated the drawbacks of traditional JRC regression correlations in handling the indeterminate information of the ***,the commonly used statistical parameters cannot reflect the roughness contribution differences of the asperities with various scales,which induces additional indeterminate information.A method based on the neutrosophic number(NN)and spectral analysis was proposed to capture the indeterminate information of the *** proposed method was then applied to determine the JRC values for sandstone joint samples collected from a rock *** comparison between the JRC results obtained by the proposed method and experimental results validated the effectiveness of the ***,comparisons made between the spectral analysis and common statistical parameters based on the NN also demonstrated the advantage of spectral ***,the NN and spectral analysis combined can effectively handle the indeterminate information in the rock joint roughness.

关键词： Rock joint roughness coefficient uncertainty indeterminate information neutrosophic number spectral analysis

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卡拉胶对蜂蜜澄清效果的研究

现代食品 2022年第19期28卷 46-49页

作者：汪良清东莞市蜂乜保健食品有限公司广东东莞523000

带有负电荷的κ型卡拉胶中的阴离子基团能与蜂蜜中蛋白质快速结合,生成大量絮状沉淀物,为蜂蜜澄清奠定基础。本文通过浊度、感官指标、理化指标验证了κ型卡拉胶对蜂蜜溶液的澄清效果,结果表明在65℃下,卡拉胶添加量为2.40 g/25 kg时,... 详细信息

带有负电荷的κ型卡拉胶中的阴离子基团能与蜂蜜中蛋白质快速结合,生成大量絮状沉淀物,为蜂蜜澄清奠定基础。本文通过浊度、感官指标、理化指标验证了κ型卡拉胶对蜂蜜溶液的澄清效果,结果表明在65℃下,卡拉胶添加量为2.40 g/25 kg时,蜂蜜溶液的澄清效果最好。

关键词：卡拉胶蜂蜜澄清温度

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柠檬蜂蜜膏冷冻干燥可行性研究

现代食品 2022年第20期28卷 95-98页

作者：汪良清东莞市蜂乜保健食品有限公司广东东莞523000

市售的柠檬蜂蜜膏主要由蜂蜜加部分柠檬汁混合浓缩脱水而成。由于柠檬蜂蜜膏中的果糖、葡萄糖、蔗糖及多糖占总物质的80%以上,具有良好的吸湿性。为将柠檬蜂蜜膏制成易携带的食品,对其冷冻干燥工艺进行了研究。结果表明,最佳柠檬蜂蜜膏... 详细信息

市售的柠檬蜂蜜膏主要由蜂蜜加部分柠檬汁混合浓缩脱水而成。由于柠檬蜂蜜膏中的果糖、葡萄糖、蔗糖及多糖占总物质的80%以上,具有良好的吸湿性。为将柠檬蜂蜜膏制成易携带的食品,对其冷冻干燥工艺进行了研究。结果表明,最佳柠檬蜂蜜膏冷冻干燥工艺为麦芽糊精添加比例25%,可溶性固形物含量19%,工作压力45 Pa。在此工艺条件下,柠檬蜂蜜膏冻干效果良好。

关键词：柠檬蜂蜜膏冷冻干燥工艺参数

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“双高”视域下的课程思政与思政课程协同育人机制研究

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昌吉学院学报 2022年第4期 24-30页

作者：王良青天津职业大学马克思主义学院天津300410

“双高”是新时代扎根中国大地办“高职”的生动实践,其重要标志就是更加注重德技并修,构建课程思政与思政课程协同育人机制,这个机制对落实立德树人根本任务、打造中国特色的职业教育体系、提高“双高”思想政治教育实效性等都具有重... 详细信息

“双高”是新时代扎根中国大地办“高职”的生动实践,其重要标志就是更加注重德技并修,构建课程思政与思政课程协同育人机制,这个机制对落实立德树人根本任务、打造中国特色的职业教育体系、提高“双高”思想政治教育实效性等都具有重要意义。但是目前“双高”建设中课程思政与思政课程协同育人机制存在协同思维的断层、协同主体和内容的缺失、协同理论的落差、协同机制的欠缺等现实困境。要突破这个困境,就要从理念协同、理论研究、内容的协同、提高教师的能力、建立各种机制等方面着力。

关键词： “双高” 课程思政思政课协同育人

XFDU标准在遥测数据定义上的应用研究与设计

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空间科学学报 2024年第1期44卷 185-191页

作者：谭杰吕良庆王彧泽中国科学院国家空间科学中心、复杂航天系统电子信息技术重点实验室北京100190 中国科学院大学北京100049

固定的星载数据格式设计会造成数据冗余,占用遥测数据下行带宽,导致不关注、不需要的数据被传输等问题.参照OAIS模型中XFDU的设计思路,提出了采用CCSDS XFDU标准进行数据格式的包装方法,采用PUS标准的参数定义方法给出了星载数据定义的... 详细信息

固定的星载数据格式设计会造成数据冗余,占用遥测数据下行带宽,导致不关注、不需要的数据被传输等问题.参照OAIS模型中XFDU的设计思路,提出了采用CCSDS XFDU标准进行数据格式的包装方法,采用PUS标准的参数定义方法给出了星载数据定义的方法模型,设计了相应的元数据schema,元数据编码表以及进一步的XFDU格式文件.相应设计了XFDU转换器,支持对描述数据格式的星载二进制数据串到XML文件的转换,基于元数据schema生成元数据文本,并进行了相应的测试验证.通用的XFDU转换器可以提供给不同的系统,供其识别和解析收到的数据格式,从而支持异构系统之间异构信息的解读.采用XFDU可以将卫星遥测场景下的数据定义模型与OAIS模型进行衔接,有利于星地的标准化数据流转、处理和保存,从而进行星载数据的灵活定义,成为定义卫星的一个手段.

关键词： XML格式化数据单元(XFDU) 包应用标准(PUS) 数据定义开放档案信息系统(OAIS)

地震作用下软硬互层顺层岩质边坡动力响应研究

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地球科学 2023年第8期48卷 3127-3136页

作者：李师毓吴琼王亮清罗红明秦越刘智琪中国地质大学工程学院湖北武汉430074 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室湖北武汉430071

软硬互层顺层岩质边坡在我国强震区广泛存在,地震极易诱发该类边坡产生地质灾害.针对地震作用下软硬互层顺层岩质边坡动力响应关键科学问题开展研究,基于离散元数值模拟法,揭示了软硬互层顺层岩质边坡动力响应规律,分析了不同边坡特征... 详细信息

软硬互层顺层岩质边坡在我国强震区广泛存在,地震极易诱发该类边坡产生地质灾害.针对地震作用下软硬互层顺层岩质边坡动力响应关键科学问题开展研究,基于离散元数值模拟法,揭示了软硬互层顺层岩质边坡动力响应规律,分析了不同边坡特征因素对其动力响应的影响.结果表明:地震作用下软硬互层边坡变形破坏主要受软硬岩间层面控制,坡表剪切口和软岩位移增量明显;地震波在传播过程中,软硬岩层对地震加速度具有放大作用,其中软岩的放大作用更明显;地震波频谱特征显示:当地震波从硬岩传播至软岩时,多个固定频段被显著放大,当从软岩传播至硬岩时,频谱有所降低;坡表位移和加速度放大系数随软岩和层面强度的增加而减小,随层厚比的增加而增大;软岩强度和层厚比会改变地震波中显著放大频段的位置,二者增大时,放大频段的数量不变,频率减小;岩层层面强度降低时,放大频段的数量和频率不变,放大程度增大.

关键词：软硬互层岩质边坡地震动力响应数值模拟离散元

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