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学者姓名：王秋生
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摘要 ：
Sudden leaks often occur when constructing shield tunnels within saturated sandy cobble strata. Therefore, it is important to examine the reasons for water seepage and understand the mechanisms behind such problems. This paper presents a study that combines laser scanning technology with the Python programming language to create software for monitoring tunnel deformation. The software was employed in a practical subway tunnel scenario, successfully acquiring deformation data pertaining to the tunnel's structural segment through the analysis of point cloud data from the tunnel lining. Furthermore, the seepage-stress coupling theory was employed to establish a three-dimensional model of shield tunnel excavation, interlinking groundwater and stratigraphic factors with the sequence of shield tunnel excavation. The origins and mechanisms of water damage resulting from seepage and leakage are explicated through an examination of the seepage field, displacement field, and deformation of the tunnel structure pre- and post-excavation. Additionally, on-site monitoring data is considered. The mechanism of tunnel leakage is outlined as follows: Tunnel excavation completion induces alterations in the seepage field, leading to an accelerated inflow of groundwater into the soil beneath the tube sheet during shield excavation. The tube sheet of the shield tunnel, composed of sand and gravel layers, experiences vertical elliptical deformation that exacerbates shifts in the displacement field due to tunnel deformation's inception and progression. Excessive tube sheet deformation triggers fracture cracks, ultimately engendering the creation of seepage channels. These channels, in turn, foster seepage and water damage. The results of this paper provide a reference for preventing and remedying water infiltration and leakage in shield tunnels constructed of sandy cobble strata.
关键词 ：
Software Software Numerical simulation Numerical simulation Sandy cobble strata Sandy cobble strata Laser Scanner Laser Scanner Shield tunneling Shield tunneling Water seepage Water seepage
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| GB/T 7714 | Li, Pei , Wang, Qiusheng , Li, Jiahao et al. Mechanism and impact of water seepage during shield tunnelling in sandy cobble strata: A case study [J]. | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2024 , 149 . |
| MLA | Li, Pei et al. "Mechanism and impact of water seepage during shield tunnelling in sandy cobble strata: A case study" . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 149 (2024) . |
| APA | Li, Pei , Wang, Qiusheng , Li, Jiahao , Pei, Ying , He, Peng . Mechanism and impact of water seepage during shield tunnelling in sandy cobble strata: A case study . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2024 , 149 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Water leakage is one of the common tunnel disease problems. Fast and accurate detection is crucial for timely management of leakage disease. This paper introduces a method for automatically extracting the location and area of tunnel leakage from 3D laser scanning point clouds. The method involves three key steps: segmenting the point cloud data along the tunnel axis based on the width of the tube sheet, correcting the intensity of the point cloud using a linear intensity correction model, and binarizing the point cloud data to extract the leakage area and calculate its area. To evaluate the performance of the proposed methodology, water leakage detection software is prepared based on the method, and tests are carried out in the urban subway tunnels in the leakage disease-producing sections. The results show a detection accuracy of 92 % and an improvement in detection efficiency of 7-8 times. The method proposed can be used to quickly and accurately extract the location and area of water leakage from point cloud data.
关键词 ：
Water leakage Water leakage Tunnel Tunnel Software Software Intensity correction Intensity correction Laser scanning Laser scanning Point clouds Point clouds
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| GB/T 7714 | Li, Pei , Wang, Qiusheng , Li, Jiahao et al. Automated extraction of tunnel leakage location and area from 3D laser scanning point clouds [J]. | OPTICS AND LASERS IN ENGINEERING , 2024 , 178 . |
| MLA | Li, Pei et al. "Automated extraction of tunnel leakage location and area from 3D laser scanning point clouds" . | OPTICS AND LASERS IN ENGINEERING 178 (2024) . |
| APA | Li, Pei , Wang, Qiusheng , Li, Jiahao , Pei, Ying , He, Peng . Automated extraction of tunnel leakage location and area from 3D laser scanning point clouds . | OPTICS AND LASERS IN ENGINEERING , 2024 , 178 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In mountain areas, flexural buckling failure of layered rock slopes due to self-weight is common, and it frequently results in serious disasters. Previous research has focused on qualitatively evaluating slope buckling stability and rarely studied the whole process from deformation to failure. In this work, we intend to quantitatively analyze the progressive movement of buckling landslide by solving the critical buckling sliding displacement. Layered rocks are simplified as an inclined multiple beam model with axial concentrated force. The sliding process of buckling is divided into three stages, which correspond to the upper rock stress reaches tensile strength, the lower rock stress reaches compressive strength, and the rock layers below the maximum uplift height of buckling segment begin to overturn under the action of self-weight. By considering tensile and compressive strength, the calculation method of critical sliding displacement is put forward, and corresponding criterion for assessing slope buckling stability is developed. The feasibility and accuracy of the proposed method were confirmed based on the good agreement among numerical manifold simulation, theoretical calculation and field data. In addition, the parameter sensitivity analysis of layered slopes stability shows that longer, thinner, and steeper soft rock slopes are more prone to buckling failure. The formation of buckling failure will be aggravated for layered rocks with smaller compressive strength, lower geological strength index and higher degree of disturbance, but the value of critical sliding displacement remains unchanged.
关键词 ：
Critical sliding displacement Critical sliding displacement Layered rock slope Layered rock slope Flexural buckling failure Flexural buckling failure Rock strength Rock strength Numerical manifold simulation Numerical manifold simulation
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| GB/T 7714 | Wang, Qiusheng , Zhang, Ruitao , Zheng, Hong et al. An analytical solution of critical sliding displacement for the flexural buckling failure of layered rock slopes [J]. | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES , 2023 , 169 . |
| MLA | Wang, Qiusheng et al. "An analytical solution of critical sliding displacement for the flexural buckling failure of layered rock slopes" . | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 169 (2023) . |
| APA | Wang, Qiusheng , Zhang, Ruitao , Zheng, Hong , Zhou, Pengzhan . An analytical solution of critical sliding displacement for the flexural buckling failure of layered rock slopes . | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES , 2023 , 169 . |
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摘要 ：
In order to study the role of calcium sulfate as activator in cementitious composites, mixtures with different calcium sulfate content ratios were designed. On the basis of satisfying the engineering castability, the effects of calcium sulfate on the mechanical properties of PVA-ECC with high-volume fly ash were investigated by uniaxial compression and tensile tests. The microstructure was analyzed by SEM and XRD. The results show that the addition of calcium sulfate has a certain activation effect and can promote the formation of ettringite. The early strength of PVA-ECC with high-volume fly ash was improved, and the tensile strain decreased by less than 0.92%. The fiber failure mode was analyzed according to the material failure mechanism. The "slip-hardening type" makes ECCs work better with PVA fibers, showing obvious strain hardening and multiple cracking character-istics. Based on the theoretical analysis, the evaluation method of obtaining high tensile strain was established, and the optimal mix ratio and calcium sulfate content of PVA-ECC with high-volume fly ash were proposed.
关键词 ：
Calcium sulfate Calcium sulfate Microstructure Microstructure Mechanical properties Mechanical properties PVA-ECC PVA-ECC High-volume fly ash High-volume fly ash
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| GB/T 7714 | Qi, Yunpeng , Wang, Qiusheng , Luo, Hao et al. Effects of calcium sulfate as activator on mechanical properties of PVA fiber reinforced cementitious composites with high-volume fly ash [J]. | POWDER TECHNOLOGY , 2023 , 430 . |
| MLA | Qi, Yunpeng et al. "Effects of calcium sulfate as activator on mechanical properties of PVA fiber reinforced cementitious composites with high-volume fly ash" . | POWDER TECHNOLOGY 430 (2023) . |
| APA | Qi, Yunpeng , Wang, Qiusheng , Luo, Hao , He, Peng , Deng, Qihua . Effects of calcium sulfate as activator on mechanical properties of PVA fiber reinforced cementitious composites with high-volume fly ash . | POWDER TECHNOLOGY , 2023 , 430 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种基于点云信息的地铁渗漏水检测方法，利用三维激光点云数据分割隧道，将隧道环号分割成多个单环点云模型，通过在各个单环内点云标量值统一改变，修正成灰度值的范围，用点云强度值代替灰度值，设定阈值。统计所有环片渗漏水面积和占比，筛选渗水面积较大的环片，达到快速检测渗漏水区域的效果。本发明直接利用点云信息的强度值进行区分渗漏水区域。图像是由像素点组成，一般都是经过格栅化将点云数据转换成图像，而不同材料之间对光的反射强度不同，可直接利用强度值作为灰度值进行渗漏水区分，因而可以简化计算过程，提高识别速度，具有很强的推广价值。
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| GB/T 7714 | 王秋生 , 李裴 , 王锋 et al. 一种基于点云信息的地铁渗漏水检测方法 : CN202211559242.5[P]. | 2022-12-06 . |
| MLA | 王秋生 et al. "一种基于点云信息的地铁渗漏水检测方法" : CN202211559242.5. | 2022-12-06 . |
| APA | 王秋生 , 李裴 , 王锋 , 张韩琪 , 贺鹏 , 裴瑛 et al. 一种基于点云信息的地铁渗漏水检测方法 : CN202211559242.5. | 2022-12-06 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了再生骨料及再生混凝土承重砌块制备方法。采用再生粗骨料100％代替天然粗骨料，粉煤灰替代部分水泥制作而成，混合料组成成分包括：再生粗骨料：天然细骨料：水泥：粉煤灰：水＝1172：578：400：100：150。首先将建筑垃圾通过分拣、破碎、加工、筛分形成再生骨料，利用混凝土搅拌机先将骨料与胶凝材料充分搅拌一分钟，然后将称量好的水分两次加入，每次加入后搅拌两分钟，总共搅拌时长为五分钟。最后将搅拌均匀的混合料装入砌块成型机加压振动制成单排孔再生混凝土承重砌块，静置24h后放入标准养护室养护28天。经试验测试证明该再生混凝土承重砌块抗压强度满足MU10，符合GB/T 8239‑2014标准的要求，可用于结构承重部分。
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| GB/T 7714 | 齐云鹏 , 王秋生 , 王帅康 et al. 再生骨料及再生混凝土承重砌块制备方法 : CN202210056267.7[P]. | 2022-01-18 . |
| MLA | 齐云鹏 et al. "再生骨料及再生混凝土承重砌块制备方法" : CN202210056267.7. | 2022-01-18 . |
| APA | 齐云鹏 , 王秋生 , 王帅康 , 李裴 , 修一兵 , 李运杰 . 再生骨料及再生混凝土承重砌块制备方法 : CN202210056267.7. | 2022-01-18 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
一种组合装配式防屈曲耗能支撑构件涉及结构加固及防灾减震领域。该构件包括内核受力单元和外围约束单元两部分。根据金属材料耗能原理，其内核受力单元设计为阻尼板，可以直接承受轴向荷载作用，有效耗散地震输入能量，外围约束单元由各种型钢和螺栓组合装配而成，对内核单元起到约束作用，显著提高内核单元的屈曲荷载，促使内核单元在外荷载作用下发生全截面屈服，进而增大构件滞回环饱满程度和耗能能力，适用于单核和双核支撑。相比于传统防屈曲支撑构件，这种构件无焊接或者极少焊接，便于拆卸和组装，定期更换阻尼板，无砂浆或混凝土灌注极大简化了防屈曲耗能支撑的加工工艺，且结构形式简单，截面样式多样，工程适用性强。
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| GB/T 7714 | 齐云鹏 , 王秋生 , 王帅康 et al. 一种组合装配式防屈曲耗能支撑构件 : CN202210266040.5[P]. | 2022-03-17 . |
| MLA | 齐云鹏 et al. "一种组合装配式防屈曲耗能支撑构件" : CN202210266040.5. | 2022-03-17 . |
| APA | 齐云鹏 , 王秋生 , 王帅康 , 周鹏展 , 邱松楠 , 张瑞涛 et al. 一种组合装配式防屈曲耗能支撑构件 : CN202210266040.5. | 2022-03-17 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种基于点云数据的地铁限界检测及调线调坡方法及系统，包括：通过三维激光扫描仪获取地铁隧道点云数据；通过点云软件处理获取的点云数据；根据处理后的点云数据进行地铁隧道断面的剖切；将限界断面与点云数据获取的实测断面图对比；通过获取断面的点云数据，然后生成隧道的断面图和地铁的限界图，再将地铁的限界图与隧道的实测点云图进行比对，根据比对的结果和地铁限界检测标推进行限界分析，根据限界分析结果进行线路的调线调坡工作。实现了对地铁限界的自动化检测；而引入三维激光扫描仪，可以不受环境和光源的限制，降低人员需求的同时，提高了检测的精度和效率。
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| GB/T 7714 | 王秋生 , 李裴 , 贺鹏 et al. 一种基于点云数据的地铁限界检测及调线调坡方法及系统 : CN202211559445.4[P]. | 2022-12-06 . |
| MLA | 王秋生 et al. "一种基于点云数据的地铁限界检测及调线调坡方法及系统" : CN202211559445.4. | 2022-12-06 . |
| APA | 王秋生 , 李裴 , 贺鹏 , 张韩琪 , 王锋 , 李佳豪 et al. 一种基于点云数据的地铁限界检测及调线调坡方法及系统 : CN202211559445.4. | 2022-12-06 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种多功能再生骨料混凝土砌块，上表面开设两个竖向对称贯通的大圆孔，用于竖向插筋和灌注再生混凝土，上下表面都有出料槽，在左右表面分别开设限位凹凸槽，用于连接相邻砌块，限位槽中心开设一个横向贯通的小圆孔，用于横向插筋，前表面开设锯齿形卡槽。砌块的多功能性主要体现在可以根据实际工程需要砌筑为填充墙、承重墙及剪力墙等各种不同承载构件。砌块采用的骨料为建筑垃圾经过处理后的再生骨料，采用的胶凝材料为由工厂废弃物磷石膏制备的磷石膏水泥。本发明可以实现建筑垃圾的回收利用，具有很高的经济效益和社会效益。
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| GB/T 7714 | 王秋生 , 王帅康 , 齐云鹏 et al. 一种多功能再生骨料混凝土砌块 : CN202210511430.4[P]. | 2022-05-11 . |
| MLA | 王秋生 et al. "一种多功能再生骨料混凝土砌块" : CN202210511430.4. | 2022-05-11 . |
| APA | 王秋生 , 王帅康 , 齐云鹏 , 许光明 , 修一兵 , 李广耀 et al. 一种多功能再生骨料混凝土砌块 : CN202210511430.4. | 2022-05-11 . |
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摘要 ：
粉煤灰掺量对PVA-ECC应变硬化性能的影响
关键词 ：
极限拉应变 极限拉应变 应变硬化 应变硬化 粉煤灰 粉煤灰 初裂强度 初裂强度 拉伸应力指数 拉伸应力指数 水泥基复合材料 水泥基复合材料
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| GB/T 7714 | 王秋生 , 温唯 , 罗昊 et al. 粉煤灰掺量对PVA-ECC应变硬化性能的影响 [J]. | 王秋生 , 2021 , 47 (4) : 321-327 . |
| MLA | 王秋生 et al. "粉煤灰掺量对PVA-ECC应变硬化性能的影响" . | 王秋生 47 . 4 (2021) : 321-327 . |
| APA | 王秋生 , 温唯 , 罗昊 , 易勇 , 北京工业大学学报 . 粉煤灰掺量对PVA-ECC应变硬化性能的影响 . | 王秋生 , 2021 , 47 (4) , 321-327 . |
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