Results 61 to 70 of about 310 (144)
Shuitu Baochi Xuebao, 2020 为探究甘肃天水浅表层滑坡易发区滑坡分布特征与植被的关系，选取典型滑坡区域和典型植被类型进行研究。油松、华山松、日本落叶松和锐齿槲栎为研究区内典型乔木类型，针对种间根系分布特征和力学特性展开研究。首先，通过无人机获取区域不同植被类型分布，统计得到不同林分类型下的滑坡密度；其次，通过剖面法调查0—100 cm土层深度内的根系数量与直径分布，进行了单根抗拉试验测得抗拉强度，并分层量化为根系附加黏聚力；最后，结合林分调查结果和岩土体力学性质，计算不同植被类型边坡在不同水分条件下和坡度下的安全系数。结果表明：（1）
李牧阳 +5 more
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Strength degradation of soft interlayer under dry-wet cycles based on 3D printing technology [PDF]
Soft interlayers are critical geological formations that significantly impact the stability of slopes in water and hydropower engineering projects. This study investigated the shear mechanical characteristics and failure mechanism of the soft interlayer ...
Hao LIU, Lei LU, Wen ZHANG
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Soil Erosion Process Under the Combined Action of Water and Gravity on Red Soil Slope [PDF]
[Objective] Soil erosion is one of the most important ecological and environmental problems in the world. It is of great significance to reveal the coupling mechanism of water and gravity combined erosion by analyzing the water and sediment process of ...
MA Lan +4 more
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Seismic intensity survey and housing safety hazard analysis of the M3.5 earthquake in Youxi County, Fujian Province [PDF]
At 11:16 am on June 8, 2024, a magnitude 3.5 earthquake occurred in Youxi County, Sanming City, Fujian Province. After the earthquake, the Fujian Earthquake Agency quickly activated a Level V emergency response and dispatched a post-earthquake field work
Chuanji Fang +6 more
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Shuitu Baochi Xuebao, 2018 为研究和比较贺兰山山杨、青海云杉、油松单根和根土复合体的力学特性，通过单根拉伸、三轴压缩、饱和渗透试验测定了3种乔木单根和根土复合体的力学参数及土水特征曲线。结果表明：3种乔木单根力学特性存在显著差异，且直径对单根的力学特性有显著影响。单根最大拉力与直径成幂函数相关，随直径增大而增大；单根抗拉强度、杨氏模量与直径成对数函数相关，随直径增大而减小。山杨单根平均最大拉力（0.38 kN） > 青海云杉（0.25 kN） > 油松（0.17 kN）；山杨单根平均抗拉强度（33.39 MPa） > 青海云杉 ...
田佳 +4 more
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Shuitu Baochi Xuebao, 2011 选取14个关中平原高速公路路堤边坡样地,分析了不同植被恢复年限下土壤水稳定性团聚体特征.结果表明:(1)随年限延长,＞1 mm大团聚体表层含量基本大于亚表层含量;＜1 mm团聚体则相反;＜0.25 mm微团聚体含量呈现出先增大后又减小的趋势,而＞5 mm团聚体含量则先减小后增大.(2)研究区阳面边坡分形维数为2.45～2.79,阴面边坡分形维数为2.48～2.70,变化幅度较小;表层分形维数小于亚表层.(3)分形维数与＜0.25 mm团聚体含量显著正相关,与有机质、全氮显著负相关.(4 ...
刘爱霞 +4 more
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Dianci bileiqi, 2021 随着电力网不断建设,丘陵、山区地带的杆塔数目也逐渐增多,这些地区土质贫瘠、地形复杂,易发生雷击事故,因此有必要对临坡杆塔接地网进行研究。笔者采用数值模拟的办法,应用仿真软件CDEGS,建立单边、双边和方框辅助接地网模型,接地材料选用镀锌钢、柔性石墨接地体和高导柔性石墨接地体,通过对比不同材料接地网间的分流系数和接地电阻,分析了外延引线长度、电流频率和土壤电阻率对不同材料接地网散流特性的影响。计算结果表明:随着外延引线增长、土壤电阻率增大,各材料分流系数均增大,其中高导石墨接地材料具有最好的散流特性 ...
连学森 +5 more
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Mechanism of rainfall-induced shallow landslide and stability prediction model [PDF]
The rainfall-induced shallow landslides are primarily debris landslides, which features simultaneity with significant hazard, and the hydrological response mechanism of water table and soil moisture content to precipitation of this type of landslide is ...
Chenxing WANG +6 more
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Shuitu Baochi Xuebao目的为探究在边坡生态修复技术中生物结皮对土壤团聚体分布及稳定性特征的影响机制。方法以植被混凝土边坡不同生物结皮覆盖（藻结皮、混生结皮、藓结皮）土壤为研究对象，以无结皮覆盖土壤（CK）为对照，采用Le Bissonnais法分别对其不同土层（0~2、2~5 cm）土壤团聚体分布、团聚体稳定性及土壤理化属性特征进行研究。结果1）与CK相比，藻结皮、混生结皮和藓结皮覆盖土壤>0.25 mm团聚体含量（R0.25）分别增加12.53%、21.97%、30.20%（0~2 cm）和20.11%、32.00%、
董悦 +8 more
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Responses of Loess Ground with Different Slopes and Vegetation Covers to Rainfall Infiltration [PDF]
[Objective] To investigate the soil moisture response to rainfall in loess ground with different slopes and vegetation types. [Methods] Eight in-situ observation plots were established, including flat surfaces with bare soil, Artemisia cover, and Robinia
HU Xiangyang +6 more
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