Dynamic Fragmentation of Jointed Rock Blocks During Rockslide‐Avalanches: Insights From Discrete Element Analyses

Zhao Tao; Crosta Giovanni Battista; Dattola Giuseppe; Utili Stefano

摘要

Abstract >The dynamic fragmentation of jointed rock blocks during rockslide avalanches has been investigated by discrete element method simulations for a multiple arrangement of a rock block sliding over a simple slope geometry. The rock blocks are released along an inclined sliding plane and subsequently collide onto a flat horizontal plane at a sharp kink point. The contact force chains generated by the impact appear initially at the bottom frontal corner of the rock block and then propagate radially upward to the top rear part of the block. The jointed rock blocks exhibit evident contact force concentration and discontinuity of force wave propagation near the joint, associating with high energy dissipation of granular dynamics. The corresponding force wave propagation velocity can be less than 200?m/s, which is much smaller than that of an intact rock (1,316?m/s). The concentration of contact forces at the bottom leads to high rock fragmentation intensity and momentum boosts, facilitating the spreading of many fine fragments to the distal ends. However, the upper rock block exhibits very low rock fragmentation intensity but high energy dissipation due to intensive friction and damping, resulting in the deposition of large fragments near the slope toe. The size and shape of large fragments are closely related to the orientation and distribution of the block joints. The cumulative fragment size distribution can be well fitted by the Weibull's distribution function, with very gentle and steep curvatures at the fine and coarse size ranges, respectively. The numerical results of fragment size distribution can match well some experimental and field observations. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> >通过离散的元素方法模拟研究了摇滚滑坡雪崩期间的关节岩块的动态碎片在简单的斜坡几何形状上滑动的岩石块的多种布置。岩石块沿倾斜的滑动平面释放，随后在尖锐的扭结点处碰撞到平坦的水平面上。由冲击产生的接触力链最初出现在岩块的底部拐角处，然后在块的顶部后部径向向上传播。连接岩块表现出明显的接触力浓度和关节附近的力波传播的不连续性，与粒状动力学的高能耗散相关联。相应的力波传播速度可以小于200≤m/ s，远小于完整岩石（1,316μm/ s）。底部的接触力的浓度导致高岩石碎片强度和动量升压，促进了许多细碎片的扩散到远端。然而，上岩块由于强化摩擦和阻尼而具有非常低的岩石碎片强度，但能量耗散高，导致斜坡脚趾附近的大碎片沉积。大碎片的尺寸和形状与块关节的方向和分布密切相关。累积片段尺寸分布可以通过Weibull的分布功能良好装配，分别在细小和粗略尺寸范围内非常温和和陡峭的曲率。片段大小分布的数值结果可以很好地匹配一些实验和现场观察。</ p> </ abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-34677/'>《Journal of geophysical research. Solid earth: JGR》</a> <b style="margin: 0 2px;">|</b><span>2018年第4期</span><b style="margin: 0 2px;">|</b><span>共20页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhao Tao&option=202" target="_blank" rel="nofollow">Zhao Tao;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Crosta Giovanni Battista&option=202" target="_blank" rel="nofollow">Crosta Giovanni Battista;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Dattola Giuseppe&option=202" target="_blank" rel="nofollow">Dattola Giuseppe;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Utili Stefano&option=202" target="_blank" rel="nofollow">Utili Stefano;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu China;</p> <p>Department of Earth and Environmental SciencesUniversità degli Studi di Milano BicoccaMilan Italy;</p> <p>Department of Earth and Environmental SciencesUniversità degli Studi di Milano BicoccaMilan Italy;</p> <p>School of EngineeringNewcastle UniversityNewcastle upon Tyne UK;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=dynamic fragmentation&option=203" rel="nofollow">dynamic fragmentation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=rockslide avalanche&option=203" rel="nofollow">rockslide avalanche;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=jointed rock&option=203" rel="nofollow">jointed rock;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=discrete element method&option=203" rel="nofollow">discrete element method;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=force wave&option=203" rel="nofollow">force wave;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=fragment size distribution&option=203" rel="nofollow">fragment size distribution;</a> </p> <div class="translation"> 机译：动态碎片;Rockslide雪崩;连接岩;离散元素法;力波;片段大小分布; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704025593003.html">Dynamic Fragmentation of Jointed Rock Blocks During Rockslide‐Avalanches: Insights From Discrete Element Analyses</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhao Tao&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Zhao Tao,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Crosta Giovanni Battista&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Crosta Giovanni Battista,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Dattola Giuseppe&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Dattola Giuseppe,</a> <a href="/journal-foreign-34677/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of geophysical research. Solid earth: JGR .</a> <span>2018</span><span>,第4期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：Rockslide-Avalanches中的关节块动态碎片：离散元分析的见解</span> </p> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/academic-journal-foreign_international-journal-geomechanics_thesis/0204119930721.html">Modeling Blast-Induced Fragmentation of Jointed Rock Mass Using Voronoi Discrete-Element Method</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Babanouri Nima&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Babanouri Nima,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Abdolahpour Milad&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Abdolahpour Milad,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Dehghani Hesam&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Dehghani Hesam </a> <a href="/journal-foreign-2653/" target="_blank" rel="nofollow" class="tuijian_authcolor">International journal of geomechanics .</a> <span>2020</span><span>,第8期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：VORONOI离散元法模拟爆炸诱导的关节岩体碎片</span> </p> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/academic-journal-cn_journal-mountain-science_thesis/0201279714368.html">Landslide dynamic process and parameter sensitivity analysis by discrete element method: the case of Turnoff Creek rock avalanche</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=AN Hui-cong&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">AN Hui-cong,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=OUYANG Chao-jun&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">OUYANG Chao-jun,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=ZHAO Chuan&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">ZHAO Chuan,</a> <a href="/journal-foreign-4807/" target="_blank" rel="nofollow" class="tuijian_authcolor">山地科学学报（英文版） .</a> <span>2020</span><span>,第007期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：滑坡动力过程和参数敏感性的离散元分析：以Turnoff Creek岩石雪崩为例</span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/academic-conference-foreign_meeting-271153_thesis/0705012345335.html">RAPID ROCK MASS FLOW WITH DYNAMIC FRAGMENTATION: INFERENCES FROM THE MORPHOLOGY AND INTERNAL STRUCTURE OF ROCKSLIDES AND ROCK AVALANCHES</a> <b>[C]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=M.J. McSAVENEY&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">M.J. McSAVENEY,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=T.R.H. DAVIES&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">T.R.H. DAVIES </a> <a href="/conference-foreign-271153/" target="_blank" rel="nofollow" class="tuijian_authcolor">NATO Advanced Research Workshop on Massive Rock Slope Failure : New Models for Hazard Assessment .</a> <span>2006</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：具有动态碎片的快速岩石质量流动：岩石岩和岩石雪崩的形态和内部结构推论</span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/academic-degree-foreign_mphd_thesis/02061198218.html">A geotechnical investigation into the Chaos Jumbles rockslide avalanches Lassen Volcanic National Park, California.</a> <b>[D] </b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ninivaggi, Seth A.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Ninivaggi, Seth A. </a> <span>2005</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：对加利福尼亚州拉森火山国家公园的混沌杂物岩崩雪崩进行岩土工程的调查。</span> </p> </li> <li> <div> <b>6. </b><a class="enjiyixqcontent" href="/academic-journal-foreign-pmc_detail_thesis/040002343348.html">Investigation of the influence mechanism of rock damage on rock fragmentation and cutting performance by the discrete element method</a> <b>[O] </b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Si-fei Liu&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Si-fei Liu,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Shuai-feng Lu&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Shuai-feng Lu,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhi-jun Wan&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Zhi-jun Wan,</a> <span>2019</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：离散元法研究岩石破坏对岩石破碎和切削性能的影响机理</span> </p> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/open-access_resources_thesis/01000124909632.html">Investigation of rock fragmentation during rockfalls and rock avalanches via 3‐D discrete element analyses</a> <b>[O] </b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Tao Zhao&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Tao Zhao,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Giovanni Battista Crosta&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Giovanni Battista Crosta,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Stefano Utili&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Stefano Utili,</a> <span>2017</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：通过三维离散元素分析调查岩石和岩石雪崩中的岩石碎片</span> </p> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/academic-journal-cn_china-powder-science-technology_thesis/0201212333837.html">离散元法在绝缘子动态积污分析中的应用</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=王国志&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 王国志</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=孙海振&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,孙海振</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=吴文海&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,吴文海</a> <span> <a href="/journal-cn-9652/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 中国粉体技术 </a> </span> <span> . 2017</span><span>,第003期</span> </span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/academic-journal-cn_detail_thesis/0201295014684.html">回忆碎片:一块冷一块暖——《暖》的诗化影像语言分析</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=梁明&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 梁明</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李力&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,李力</a> <span> <a href="/journal-cn-57172/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 当代电影 </a> </span> <span> . 2004</span><span>,第2期</span> </span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/academic-journal-cn_machinery-design-manufacture_thesis/0201224730789.html">基于有限元分析的炭块平面铣床主轴的动态分析</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李燕&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 李燕</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李慧琴&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,李慧琴</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=唐豫桂&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,唐豫桂</a> <span> <a href="/journal-cn-8244/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 机械设计与制造 </a> </span> <span> . 2011</span><span>,第001期</span> </span> </div> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/academic-journal-cn_practical-journal-clinical-medicine_thesis/0201279238201.html">髋臼边缘负重区全缺损结构性植骨的不同固定方式对人工全髋关节置换术后植骨块初始微变形程度影响的有限元分析</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=许瀚&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 许瀚</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=许鸿&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,许鸿</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=吕波&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,吕波</a> <span> <a href="/journal-cn-5848/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 实用医院临床杂志 </a> </span> <span> . 2020</span><span>,第003期</span> </span> </div> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/academic-journal-cn_shandong-medical-journal_thesis/0201250117104.html">过伸复位治疗胸腰椎压缩性骨折关节突关节动态力学有限元分析</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=任伯绪&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 任伯绪</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李孝林&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,李孝林</a> <span> <a href="/journal-cn-6645/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 山东医药 </a> </span> <span> . 2010</span><span>,第014期</span> </span> </div> </li> <li> <div> <b>6. </b><a class="enjiyixqcontent" href="/academic-conference-cn_meeting-24291_thesis/020221098141.html">波纹形表面部件作用下土壤动态行为的离散元分析</a> <b>[C]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=张锐&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 张锐</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=中国科学技术大学&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,中国科学技术大学</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李建桥&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,李建桥</a> <span> <a href="/conference-cn-24291/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 中国农业机械学会2006年学术年会 </a> <span> <span> . 2006</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/020316007609.html">脆性材料动态力学行为的离散元分析</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=马棋棋&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 马棋棋</a> <span> . 2019</span> </span> </div> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/patent-detail/06120104073690.html">一种去除有限元仿真分析结果中节点离散误差的方法</a> <b>[P]</b> . <span> 中国专利： CN111428411A </span> <span> . 2020-07-17</span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/patent-detail/06120101349062.html">一种在块体离散元中实现参数反分析的方法</a> <b>[P]</b> . <span> 中国专利： CN110378030A </span> <span> . 2019-10-25</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130433805631.html">CONSTRUCTION METHOD FOR GUARD FENCE OR SOUNDPROOF WALL AGAINST AVALANCHE AND ROCK FALL, PRECAST CONCRETE BLOCK CONSTITUTING UPPER SECTION OF RETAINING WALL OR FOUNDATION BLOCK, AND TEMPORARY FIXING MEMBER FOR SUPPORT FOR USE IN CONSTRUCTION METHOD FOR GUARD FENCE OR SOUNDPROOF WALL AGAINST AVALANCHE AND ROCK FALL</a> <b>[P]</b> . <span> 外国专利：  JP2008255632A </span> <span> . 2008-10-23</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：防止雪崩和岩石崩塌的防护栅栏或防音墙的施工方法，构成挡土墙或地基砌块的上部的预制混凝土砌块以及用于防护栅栏或防音墙和防浪墙的临时固定构件 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130428529092.html">The protection fence of the avalanche falling rock or construction manner of the soundproof wall, stand facilities locking the standards on temporary locking component null retaining wall top or the fundamental block surface of the standards which are used for the protection fence of retaining wall upper or precast concrete block, and the avalanche</a> <b>[P]</b> . <span> 外国专利：  JP4427690B2 </span> <span> . 2010-03-10</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：雪崩落石的防护栅栏或隔音墙的施工方式，将设施标准锁定在临时锁定构件的空挡墙顶或标准的基本砌块表面上，用于挡土墙的上部或预制的防护栅栏混凝土砌块和雪崩 </span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/patent-detail/06130462832984.html">Multiplexer-demultiplexer for synthesising or analysing frequency multiplex signals in multi-carrier system - has common filter block and real and imaginary part blocks for inverse discrete fast Fourier transformation</a> <b>[P]</b> . <span> 外国专利：  DE4116495C1 </span> <span> . 1992-06-17</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：用于在多载波系统中合成或分析频率多路复用信号的多路复用器多路分解器-具有公共滤波器块以及实数部分和虚数部分块，用于反向离散快速傅里叶变换 </span> </p> </li> </ul> </div> </div> </div> <div class="theme cardcommon" style="overflow: auto;display:none"> <h3 class="all_title" id="enpatent55">相关主题</h3> <ul id="subject"> </ul> </div> </div> </div> </div> <div class="right rightcon"> <div class="details_img cardcommon clearfix" style="margin-bottom: 10px;display:none;" > </div> </div> </div> <div id="thesis_get_original1" class="downloadBth" style="bottom: 19px;z-index: 999;" onclick="ywcd('0704025593003','4',7,2,1,'',this,24)" class="delivery" prompt="010401" title="通过人工服务将文献原文发送至邮箱" >获取原文</div> <div class="journalsub-pop-up" style="display: none"> <div class="journal-sub"> <h2>期刊订阅</h2> <img src="https://cdn.zhangqiaokeyan.com/img/loginclose.png" alt="关闭" onclick="$('.journalsub-pop-up').hide()"> <p class="pardon">抱歉，该期刊暂不可订阅，敬请期待！</p> <p class="current">目前支持订阅全部北京大学中文核心（2020）期刊目录。</p> <div style="display: flex;margin-top: 69px;justify-content: space-between;"> <div class="no-sub" onclick="$('.journalsub-pop-up').hide()">暂不订阅</div> <div class="other-sub" onclick="continueSub('from=pc-detail')">继续订阅其他期刊</div> </div> </div> </div> <div class="right_btn"> <ul> <li class="gouwuche">  </li> <li class="yijian"> <a href="javascript:void(0);" onclick="link_analysis('/mycenter/auth/complaint.html',this)" title="意见反馈">意见反馈</a> </li> <li class="top"> <a href="javascript:scrollTo(0,0);" title="回到顶部">回到顶部</a> </li> <li class="shouye"> <a href="/" title="首页">回到首页</a> </li> </ul> </div> <div class="xllindexfooter"> <div class="xllindexfootercenter"> <div class="xllindexfooterleft left" > <div class="xllindexfooterleftli"> <ul> <li><a href="/about.html" title="关于掌桥">关于掌桥</a></li> <li><a href="/help/helpmap.html" title="资源导航">资源导航</a></li> <li><a href="/help/helpguide.html" title="新手指南">新手指南</a></li> <li><a href="/help/helpcenter.html" title="常见问题">常见问题</a></li> <li><a href="/sitemap.html" title="网站地图">网站地图</a></li> <li><a href="/help/helpcenter.html?type=9" title="版权声明">版权声明</a></li> </ul> </div> <div class="xllindexfooterleft"> <p class="xllindexfooterlefteamil">客服邮箱：kefu@zhangqiaokeyan.com</p> <div class="xllindexfooterlefttcp"> <div class="xllindexfooterpoliceiimg"></div> <div class="xllindexfooterpoliceispan"> <span>京公网安备：11010802029741号 </span> <span>ICP备案号：<a href="https://beian.miit.gov.cn" rel="nofollow" target="_blank" title="ICP备案号">京ICP备15016152号-6</a></span> <span>六维联合信息科技 (北京) 有限公司©版权所有</span> </div> </div> </div> </div> <div class="xllindexfooterright left"> <ul> <li> <p style="font-weight: bold;">客服微信</p> <div></div> </li> <li> <p style="font-weight: bold;">服务号</p> <div></div> </li> </ul> </div> </div> </div> <span id="0704025593003down" data-source="7," data-out-id="k1dU+Pp9PZVJyB/G3SZuVTJvoqxeCFulmfFksXgJ8cBJVAhu8yT0fRcHtzxN1c5A," data-f-source-id="7" data-title="Dynamic Fragmentation of Jointed Rock Blocks During Rockslide‐Avalanches: Insights From Discrete Element Analyses" data-price="20" data-site-name="" data-transnum="24" style="display:none;"></span> <input type="hidden" value="4" id="sourcetype"> <input type="hidden" value="34677" id="journalid"> <input type="hidden" value="1" id="inyn_provide_service_level"> <input type="hidden" value="https://cdn.zhangqiaokeyan.com" id="imgcdn"> <input type="hidden" value="1" id="isdeatail"> <input type="hidden" value="" id="syyn_indexed_database"> <input type="hidden" value="" id="servicetype"> <input type="hidden" id="pagename" value="Dynamic Fragmentation of Jointed Rock Blocks During Rockslide‐Avalanches: Insights From Discrete Element Analyses"/> <input type="hidden" value="thesis_get_original" id="pageIdentification"> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/jquery-1.12.4.js"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/common/lwlh_ajax.js"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/zq.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/common/common.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/jquery.cookie.js"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/top.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/common/tip.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/common/login.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/common/down.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/common/search.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/common/newmail.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/searchtype.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/user/regist.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/zxs_solor/detail.js?v=5.7.8"></script> <script type="text/javascript" src="https://www.zhangqiaokeyan.com/statistics/static/pagecollection.js"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/tj.js"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/common/sse.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/pushbaidu.js"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/common/history.js"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/util/cookie.js?v=5.7.8"></script> <script type="text/javascript" src="https://cdn.zhangqiaokeyan.com/js/weipu/weipu.js?v=5.7.8"></script> </body> <script> function kefu(customization) { var from = GetQueryString("from"); if (from == null || from == "") { from = "other"; } var url = getWxWorkQrCode(55, from, customization); if (url == "" || typeof url == 'undefined') { url = "https://wework.qpic.cn/wwpic/994838_0LUTS-VqR0quT1N_1675665967/0"; } tipDocGuidance(url, '人工辅助获取外文期刊材料'); } $(function(){ var weiPuStatus = getCookie('WeiPuStatus'); if(weiPuStatus){ tipWeiPuStatus(weiPuStatus); delCookie('WeiPuStatus'); } getFacetKeywordVoInId(); var sourcetype = $("#sourcetype").val(); var inyn_provide_service_level = $("#inyn_provide_service_level").val(); if((sourcetype ==1||sourcetype==4)&&inyn_provide_service_level!=4){ getJournal(); } }) </script> </html>