Results 1 to 10 of about 128 (76)
城市建设理论研究—市政工程, 2022 城镇道路是保证国民经济建设和人民安居乐业的重要基础设施。由于丘陵、岗地地区到处存在低矮山包、土丘道路起伏过大，多处道路存在深挖高填现象。因此，市政道路路基施工中，路基边坡防护至为关键，在保证路基稳定性和强度中起关键性作用，施工技术水平及质量会影响道路的使用年限。而且路基边坡防护还能有效避免滑坡、溜方、剥落和碎落崩塌等问题的出现，减少影响车辆行驶存在的安全隐患。论文简述了路基边坡存在的病害、防护的主要原因及基本原则，浅谈了几种在低矮丘陵岗地地区常见的路基边坡防护施工技术。
郭 亚军
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Slope Rill Erosion and Morphological Evolution Based on UAV Nap-of-the-object Photogrammetry [PDF]
, 2023 [Objective] This study was conducted to determine a rill erosion technology having high efficiency, high accuracy and strong adaptability, and overcome deficiencies associated with traditional measurement methods (low efficiency, high cost, poor ...
Gao Zhaoliang +7 more
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Evaluation of Collapse Susceptibility Based on a Contribution Rate Model [PDF]
, 2022 [Objective] The spatial database of geological disaster field survey was conducted to analyze the formation mechanism and failure mode of collapse in the area where granite weathered residual soil was developed, to explore the contribution rate of ...
Cai Junjian +4 more
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Major Achievements and Future Key Fields of Soil Erosion Research in China [PDF]
, 2022 [Objective] The developing history of soil erosion research in China was reviewed, the major research achievements were summarized, and the current problems and key research fields in the future were analyzed to provide a reference for China's soil and ...
Cai Qiangguo, Ke Qihua, Zhang Keli
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Optical spectrum of the post-AGB Star HD56126 in the wavelength interval 4010-8790 Å Å [PDF]
Astrophysical Bulletin, 2007 The optical spectrum of the post-AGB star HD56126 identified with the infrared source IRAS07134+1005 is studied in detail using high spectral resolution observations (R = 25000 and 60000) performed with the echelle spectrographs of the 6-m telescope. A total of about one and a half thousand absorptions of neutral atoms and ions, absorption bands of C2,
V. G. Klochkova +3 more
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Measurement of the A-Value of the Intersystem Transition in Al II at 2670 Å: Å Progress Report [PDF]
International Astronomical Union Colloquium, 1984 Ratios of intensities of spectral lines produced in the radiative decay of collisionally-excited levels of atomic ions are versatile indicators of electron density in astrophysical plasmas when one of the lines involves a metastable level (see the review by Feldman 1981 and references therein). Radiative transition probabilities (A-values) and electron
B. Carol Johnson, H.S. Kwong
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Assessment of landslide susceptibility in the Huangshui River Basin based on catastrophe theory [PDF]
, 2023 The Huangshui River Basin, an important upstream tributary of the upper reaches of the Yellow River, serves as the political, economic, and cultural center of Qinghai Province, and is also a region with a high incidence of geological disasters.
Bin LI +4 more
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Shuitu Baochi Xuebao, 2023 南方花岗岩崩岗侵蚀区崩壁常见形似内凹洞的特殊地貌(龛穴),该地貌的发育可引起崩壁失稳并扩大崩岗侵蚀范围。通过刻画龛穴形态演变过程,研究龛穴发生的物质条件与驱动因素,并结合力矩分析方法构建力学模型评价崩壁及龛穴稳定性。研究表明:龛穴形态演变经历"雏形—发育—形成"3个过程,剖面土层异质性是龛穴发育的基础条件,水力与重力作为外部因素共同作用驱动龛穴发育。龛穴稳定性随其高度增加、角度减小而降低。龛穴的发育可能是崩岗溯源侵蚀启动的标志,遏制龛穴形成有利于提高崩壁稳定性,研究结果为崩岗侵蚀治理提供理论依据。
何玲, 邓羽松
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Shuitu Baochi Xuebao, 2022 为探究我国南方花岗岩红壤地区崩岗的起始标志和发育阶段。在湖北省通城县和广西岑溪市2个典型崩岗区调查崩岗的发育过程。结果表明，2个调查区都存在一种细沟发育而来的龛状浅沟，将其命名为龛沟。龛沟具有3个特征：上游有明显细沟，沟壁陡峭且具有上窄下宽的宽深梯形形态。龛沟主要发生在砂土层裸露、具有一定汇水面积和局地坡度>30°的裸露坡面。龛沟是一种特殊形态的浅沟，其定义、形态和侵蚀营力都不同于常规浅沟、切沟和Amphitheatershaped canyons等沟蚀地貌 ...
高钰淏 +5 more
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