Results 41 to 50 of about 310 (144)
Shuitu Baochi Xuebao, 2021 土-水特征曲线通常用于估计非饱和土壤的抗剪强度，但是由于植物根系的吸水作用和加筋效应，使得植物边坡的抗剪强度不能直接利用基于基质吸力的非饱和土抗剪强度计算公式进行计算。以裸露边坡和植被边坡为研究对象，采用张力计现场测试和室内剪切试验相结合的方法，拟合水土特征曲线关系。结果表明：（1）植物根系的植入有效地提高了边坡土体的进气值，较素土进气吸力值增幅41.10%。在同等含水率条件下，植物边坡基质吸力明显大于素土边坡，提高了边坡土体的持水能力。（2）边坡红黏土基质吸力与含水率的关系符合V-G模型 ...
王轩 +4 more
doaj
Analysis on factors controlling shallow failures of the cut slopes and its prevention by bio-engineering measures: A case study of the cut slopes along the highway from Shuangcheng to Dajiali [PDF]
Understanding the primary and secondary relations of influencing factors is crucial for predicting deformation and controlling collapse in cutting slopes. Using a cutting slope along the Shuangcheng to Dalijia expressway in Gansu Province as the research
Changgen YAN +4 more
core +1 more source
DETERMINATION METHOD OF LIMIT EQUILIBRIUM STATE AND CRITICAL SLIP SURFACE OF SOIL SLOPE [PDF]
, 2012 开展边坡失稳判据及临界滑动面确定方法的理论与数值实现研究。应用分叉理论的研究成果,证明满足关联流动法则的理想弹塑性材料,在平面应力或平面应变条件下的失稳模式为应变局部化模式,由此类材料构成的边坡模型的失稳过程为局部带渐进扩展过程。基于以上证明,提出局部化带贯通判据,认为表征边坡整体失稳的充要条件是局部化带在边坡内部的完全贯通。基于数值模拟,发展一种局部化带路径追踪技术,根据每个增量时步土体单元的局部化状态信息,通过后处理显式追踪局部化带的形成、扩展、汇合直至贯通的过程,直观、方便地判断边坡的极限平衡状态,
刘晓宇, 刘洋, 李世海, 赵颖
core
Analysis of open-pit coal mine collapse accident based on AcciMap model [PDF]
Take Alxa open-pit coal mine collapse accident on February 22 in Inner Mongolia as an example, on the basis of identifying the cause factors of the accident, the logical relationship between the cause factors of the accident is sorted out, and the ...
Yamin GUO, Yang LI, Zhaobo CHEN
core +1 more source
First sliding area analysis of expansive soil slope based on the upper and lower bound solutions [PDF]
Expansive soil landslides are prone to frequent disasters due to the expansion, cracking, and over-consolidation characteristics of expansive soil. However, traditional analysis methods cannot adequately reflect the progressive failure characteristic of ...
Jiong LIANG +3 more
core +1 more source
Zhendong Ceshi yu Zhenduan为研究管道过流产生的流激振动对穿管堤防稳定性的影响，以广东省某穿管堤防为例，首先，建立管道‑堤防三维有限元模型，依据渗流计算确定最不利穿管工况，得到穿管堤防最大渗透力；其次，根据实测振动响应反演流激振动荷载，结合有限元动力法与强度折减法进行边坡动力稳定性分析；最后，采用间接耦合法实现渗透力‑流激振动多荷载耦合，研究渗流与流激振动对边坡稳定性的影响。结果表明：在仅考虑渗流作用下，穿管堤防上、中、下3种穿管工况安全系数分别降低15.0%、5.4%和16.5%；在渗透力‑流激振动耦合作用下 ...
doaj +1 more source
Shuitu Baochi Xuebao, 2019 为探索钠盐含量变化对海涂粉砂土工程边坡稳定性的影响，以界限含水率试验和抗剪强度测定试验为基础，分析Na+含量对粉砂土界限含水率和抗剪强度等土力学参数的响应规律，并结合无限边坡安全系数计算，明确不同饱和度条件下土壤Na+含量变化对边坡稳定性的影响。结果表明：随着Na+含量增加，土样塑限呈缓慢增大趋势，而液限呈减小的变化规律。平均黏聚力和平均内摩擦角均随Na+含量增加而减小。对相同质地土壤，当饱和度不变时，边坡安全系数FS随Na+含量增加而减小；当Na+含量不变时，土壤饱和度越大，安全系数FS越小 ...
郑一鹏, 佘冬立, 王洪德
doaj
Probabilistic inverse-analysis and reliability prediction of rainfall-induced landslides for slope with multi-source information [PDF]
Probabilistic inverse-analysis is an essential approach to infer statistical characteristics of uncertain soil parameters, making the slope reliability assessment closer to engineering reality.
Faming HUANG +4 more
core +1 more source
Shuitu Baochi Xuebao, 1994 该文以平朔安太保露天矿为例，探讨了岩土侵蚀的形式，分布及成因，岩土侵蚀的危害和潜在危险。首次提出排土场岩蚀控制的方针为“以排为主，排蓄结合，调节水分，增强整体稳定性，迅速复垦，恢复植被，建立生物工程相结合的控制体系”，控制技术包括基底处理，平盘边坡防护，滑坡崩塌危险区控制及排土复垦工艺。
王治国 佟则昴
doaj +2 more sources
Shuitu Baochi Xuebao, 2023 为研究自然边坡其强度特性随含水率的变化规律。通过设计不同体积含水率(20%,27%,35%,40%,45%)和2种含根量(RAR=0.1%,0.3%)的重塑土进行不固结不排水三轴试验,以研究含水率对土体破坏方式、抗剪强度和初始切线模量的影响。结果表明:(1)试样破坏模式多为剪切变形和剪胀变形,在含水率为20%,27%时,出现明显剪切贯穿面破裂带,其余含水率下表现为剪胀变形;(2)含水率对根土复合体抗剪强度主要体现在黏聚力上,含水率从20%升至45%时,2种含根量的根土复合体黏聚力分别降低67%,72 ...
骆丕昭 +5 more
doaj