Jianzhu Gangjiegou Jinzhan在北方寒冷地区，钢管混凝土结构因冻融作用侵蚀而造成钢管开裂以及钢管混凝土结构力学性能劣化从而导致结构破坏的事故时有发生。针对冻融侵蚀后钢管混凝土界面黏结性能问题，制作了钢管混凝土推出试件，考虑冻融循环次数、混凝土强度、钢管径厚比等不同参数，进行冻融试验和推出试验，分析了界面黏结力的分布规律和影响因素，研究了冻融循环作用后钢管混凝土界面黏结滑移本构关系，确定了界面平均黏结强度以及峰值黏结强度、残余黏结强度特征值。结果表明，随着冻融循环次数的增加，界面平均黏结强度减小，极限荷载对应的滑移逐渐增大 ...
曾在平 +3 more
doaj +4 more sources
Soil Particle Settlement Sorting and Distribution Characteristics of Carbon, Nitrogen and Salt During Gradual Thawing [PDF]
, 2023 [Objective] The classification of sediment particles and the accompanying distribution characteristics of carbon, nitrogen and salt in the process of soil thawing layer by layer under snowmelt runoff scenario were analyzed in order to identify the ...
Hu Yaxian +5 more
core +1 more source
Mesostructure and strength characteristics of granite under freeze-thaw cycles based on CT scanning [PDF]
, 2023 Objective With the rapid increase in construction projects in the western regions in recent years, the impact of seasonal freeze-thaw cycles in the high-altitude areas of western China has become more pronounced.
CHEN Liang +8 more
core +1 more source
Experimental study on dynamic mechanical behavior of frozen sandstone with different saturations [PDF]
, 2023 Water content is one of the critical factors affecting frost damage to rock masses in alpine regions. A dynamic disturbance load further complicates the issue.
Hai PU, Junce XU, Ziheng SHA
core +1 more source
Response of Soil Respiration to Storage Irrigation and Freeze-thaw Cycles in Extremely Arid Areas [PDF]
, 2022 [Objective] The effects of water storage irrigation and seasonal freezing and thawing on soil respiration were determined in order to improve the utilization efficiency of irrigation water resources, and save irrigation water resources at Shiyang River ...
Gao Yayu +3 more
core +1 more source
Importance Analysis of Vegetation Change Factors in East Africa Based on Machine Learning [PDF]
, 2023 [Objective] A factor importance analysis of vegetation changes in East Africa based on different machine learning algorithms was conducted to measure the accuracy and applicability of the different algorithms in order to provide a scientific basis for ...
Ma Bo, Zhang Xiumei, Zhang Yijie
core +1 more source
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
core +1 more source
, 2019 在季节性冻土地区,沥青路面反复经历冻融循环作用,极易出现开裂、坑槽、拥包等病害,其中以横向开裂最为显著。沥青的黏弹性能和骨料的级配特征是影响沥青混合料抗冻融能力的关键因素。目前,大量研究集中在沥青低温性能评价和沥青混合料低温性能研究方面,忽视了骨料级配在冻融前后的差异。该文通过现场调查和室内试验,分析了骨料级配与沥青混合料开裂情况的相关性。研究结果表明:在沥青满足设计要求的情况下,粗集料含量越少(级配曲线越靠近上限值),沥青路面的低温开裂越严重 ...
侯亚丽, 林铭彬, 马宏岩
core +1 more source
Advanced characterization of coal microstructure before and after liquid nitrogen cold soaking [PDF]
, 2023 With the development of coal seam fracturing technology, promote the gas extraction by liquid nitrogen cold soaking fracturing coal has attracted widespread attention. In order to study the effect of liquid nitrogen cold soaking on the microstructures of
Dengke WANG, Shumin LIU, Xuelong LI
core +1 more source
Soil Erosion and Its Spatial Distribution Characteristics in Three-River-Source National Park [PDF]
, 2023 [Objective] The Three-River-Source National Park (TRSNP) is considered to be the “water tower of China”, and is an important ecological security barrier in China.
Huang Tingting +5 more
core +1 more source