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学者姓名：张明聚
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Abstract ：
局部失效(混凝土或钢筋缺失)会显著影响盾构管片的承载性能，甚至会诱发隧道整体结构的破坏。为明确局部失效对管片承载特性的影响，分别开展了标准管片和跨中及侧部开孔管片承载特性的足尺试验，并对管片的位移、裂缝扩展及混凝土应变进行了监测。试验结果表明：管片破坏过程分为4个典型阶段，并将各个阶段的临界荷载定义为管片的3个特征荷载。根据各特征荷载值对管片的承载特性进行了对比分析，明确了开孔管片的承载能力低于标准管片，且开孔位置对管片的承载特性具有较强影响。为进一步明确局部失效盾构管片试验结果的准确性，采用混凝土弹塑性损伤本构建立了与试验对应的三维精细化数值模型，并通过与模拟的对比验证了试验结果的合理性。随后，依据标准管片各承载特性，定量分析了管片开孔直径及开孔位置等因素对管片抗弯承载特性的影响规律，并初步提出了局部失效盾构管片抗弯承载特性的理论计算模型。研究结果可为极端条件下地铁盾构隧道的安全性评估及加固设计提供理论基础。
Keyword ：
隧道工程 隧道工程 足尺试验 足尺试验 局部失效 局部失效 盾构管片 盾构管片 破坏机理 破坏机理 承载特性 承载特性
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| GB/T 7714 | 高晓静 , 李鹏飞 , 张明聚 et al. 局部失效盾构隧道管片承载特性及破坏机理 [J]. | 中国公路学报 , 2023 , 36 (11) : 302-311 . |
| MLA | 高晓静 et al. "局部失效盾构隧道管片承载特性及破坏机理" . | 中国公路学报 36 . 11 (2023) : 302-311 . |
| APA | 高晓静 , 李鹏飞 , 张明聚 , 王海峰 , 贾子琦 , 冯武 . 局部失效盾构隧道管片承载特性及破坏机理 . | 中国公路学报 , 2023 , 36 (11) , 302-311 . |
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Abstract ：
To cater to the problems of a poor working environment, a large amount of rebound, and the high energy consumption of sprayed concrete in tunnel engineering, this paper proposes a new support scheme with a steel corrugated plate combined with mold bag concrete. Analytical solutions of stresses for steel corrugated plate and mold bag concrete were deduced based on the thin-walled cylinder, and then their strength safety factors were presented. Subsequently, a series of numerical simulations were conducted to investigate the mechanical performance of the third ring of the main structure based on the 'load-structure' 3D model. The numerical results were verified using the classical theoretical analysis and the proposed model, and then parametric studies were performed through the numerical method. Finally, field tests in a circular shaft were carried out to verify the feasibility of the structure and process and the engineering effect. The results show that the combination of steel corrugated plate and mold bag concrete is feasible and can realize rapid support technology for underground engineering, which provides a new idea for the supporting technology of underground engineering such as tunnels.
Keyword ：
steel corrugated plate combined with mold bag concrete steel corrugated plate combined with mold bag concrete circular shaft circular shaft field test field test thin-walled cylinder thin-walled cylinder supporting structure supporting structure
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| GB/T 7714 | Li, Pengfei , Wang, Shuo , Zhang, Mingju et al. Supporting Structure of Steel Corrugated Plate-Mold Bag Concrete and Its Application in a Circular Shaft [J]. | APPLIED SCIENCES-BASEL , 2023 , 13 (23) . |
| MLA | Li, Pengfei et al. "Supporting Structure of Steel Corrugated Plate-Mold Bag Concrete and Its Application in a Circular Shaft" . | APPLIED SCIENCES-BASEL 13 . 23 (2023) . |
| APA | Li, Pengfei , Wang, Shuo , Zhang, Mingju , Huang, Zhengdong . Supporting Structure of Steel Corrugated Plate-Mold Bag Concrete and Its Application in a Circular Shaft . | APPLIED SCIENCES-BASEL , 2023 , 13 (23) . |
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Abstract ：
Disconnectable coupling (DC) joints of steel bracing in foundation pit engineering are inevitably subjected to eccentric load, but their mechanical properties under eccentric load have not been thoroughly investigated. Based on full-scale test results of DC joints under axial compression, a validated finite element model was established. The bearing capacity and flexural performance of DC joints under eccentric load were studied systematically through a series of numerical simulations. These parameters included the length, width and height of the steel wedge; eccentricity; steel tube wall thickness; channel steel thickness and middle-rib plate height. Based on the numerical results, a modified moment-rotation model was established. The results obtained show that the numerical models accurately reflect the failure mode and the load-displacement curves revealed by the full-scale test. The bearing capacity and flexural performance of DC joints decreases with eccentricity, middle-rib plate height, and steel wedge height. The effect of eccentricity is the most significant. By contrast, the bearing capacity and flexural performance of DC joints increases with steel wedge length, steel wedge width, channel steel thickness and steel tube wall thickness. The modified moment-rotation model can describe the flexural performance of DC joints accurately under eccentric load.
Keyword ：
disconnectable coupling joint disconnectable coupling joint parameter analysis parameter analysis moment-rotation model moment-rotation model eccentric compression eccentric compression finite element method finite element method foundation pit engineering foundation pit engineering
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| GB/T 7714 | Xie, Zhitian , Niu, Xiaokai , Li, Pengfei et al. Mechanical Properties of Disconnectable Coupling Joints for Steel Bracing under Eccentric Load [J]. | APPLIED SCIENCES-BASEL , 2023 , 13 (9) . |
| MLA | Xie, Zhitian et al. "Mechanical Properties of Disconnectable Coupling Joints for Steel Bracing under Eccentric Load" . | APPLIED SCIENCES-BASEL 13 . 9 (2023) . |
| APA | Xie, Zhitian , Niu, Xiaokai , Li, Pengfei , Zhang, Mingju , Liu, Xiao . Mechanical Properties of Disconnectable Coupling Joints for Steel Bracing under Eccentric Load . | APPLIED SCIENCES-BASEL , 2023 , 13 (9) . |
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Abstract ：
本发明属于基坑支护技术领域，具体的说是一种装配式组合钢管混凝土内支撑固支端结构；包括预埋钢板和短接件；所述预埋钢板的表面固定连接有托盘；所述短接件的表面固定连接有高脚螺栓；所述短接件的表面通过高脚螺栓螺纹连接有第一法兰盘；所述短接件与第一法兰盘之间装填有多个模袋；通过此结构，既能承担压力也能承载拉力和弯矩，且采用模袋混凝土灌浆填缝，可以达到内支撑两端充分填缝的效果，并消除由施工误差引起的偏心作用且实现了模块化施工，通过微型高压混凝土泵在压注过程中能够施加给混凝土一定的预应力，降低了混凝土水灰比，一定程度上提高了混凝土早期承受强度，起到快速承载作用。
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| GB/T 7714 | 郭彩霞 , 张明聚 , 单余含 et al. 一种装配式组合钢管混凝土内支撑固支端结构 : CN202211112069.4[P]. | 2022-09-13 . |
| MLA | 郭彩霞 et al. "一种装配式组合钢管混凝土内支撑固支端结构" : CN202211112069.4. | 2022-09-13 . |
| APA | 郭彩霞 , 张明聚 , 单余含 , 孔恒 , 郭飞 , 傅睿智 et al. 一种装配式组合钢管混凝土内支撑固支端结构 : CN202211112069.4. | 2022-09-13 . |
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Abstract ：
This paper aims at analyzing the influence of non-associated flow rule on passive face instability for shallow shield tunnels. The influence exerted by dilation angle on the limit support pressures, the failure zones and partial failure ratios is investigated by numerical simulations. Based on the failure zone obtained from numerical simulation, a log-spiral mechanism is proposed. The upper-bound theorem is employed to acquire the limit support pressures, failure zones and partial failure ratios. The analytical results indicate that dilation angle has a significant influence on the limit support pressure and failure mechanisms. Finally, by comparison with the numerical models and existing analytical models, the results indicate that the proposed log-spiral model has a certain accuracy in analyzing the face instability of blow-out.
Keyword ：
Limit analysis Limit analysis Blow-out Blow-out Shallow tunnels Shallow tunnels Numerical simulations Numerical simulations Non-associated flow rule Non-associated flow rule
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| GB/T 7714 | Li, Pengfei , Wei, Yingjie , Zhang, Mingju et al. Influence of non-associated flow rule on passive face instability for shallow shield tunnels [J]. | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2022 , 119 . |
| MLA | Li, Pengfei et al. "Influence of non-associated flow rule on passive face instability for shallow shield tunnels" . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 119 (2022) . |
| APA | Li, Pengfei , Wei, Yingjie , Zhang, Mingju , Huang, Qingfei , Wang, Fan . Influence of non-associated flow rule on passive face instability for shallow shield tunnels . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2022 , 119 . |
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Abstract ：
Rainfall infiltration is one of the main triggers of slope failure. Based on the upper bound theorem of limit analysis, this work presents an analytical stability analysis of a 3D vertical cut slope subjected to rainfall infiltration. An analytical model that can directly provide pore water pressure change at any depth and time is adopted to calculate the time-dependent matric suction and shear strength of unsaturated soil during the rainfall infiltration process. Thereafter, based on a 3D rotational failure mechanism of a slope, the energy balance equation is built, and the factor of safety (FoS) of the slope is consequently determined in conjunction with the strength reduction technique. The influences of the 3D characteristics of the slope and rainfall patterns on both FoS and failure pattern of the slope are investigated. It is found that the 3D characteristic of slope is a key factor which determines the FoS of slope. Different rainfall infiltration patterns lead to diverse variation rules of both the FoS solutions and the critical failure patterns of slope. However, these rainfall patterns with a same accumulated rainfall result in the same FoS solution of slope at the end of rainfall infiltration. The present work may provide guidance on the stability analysis and preliminary design of slopes subjected to rainfall infiltration.
Keyword ：
Pore water pressure change Pore water pressure change Unsaturated soil Unsaturated soil Rainfall infiltration Rainfall infiltration 3D slope stability 3D slope stability
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| GB/T 7714 | Xu, Jingshu , Zhao, Xu , Li, Pengfei et al. Stability of a 3D unsaturated vertical cut slope subjected to variable rainfall infiltration [J]. | COMPUTERS AND GEOTECHNICS , 2021 , 134 . |
| MLA | Xu, Jingshu et al. "Stability of a 3D unsaturated vertical cut slope subjected to variable rainfall infiltration" . | COMPUTERS AND GEOTECHNICS 134 (2021) . |
| APA | Xu, Jingshu , Zhao, Xu , Li, Pengfei , Zhang, Mingju . Stability of a 3D unsaturated vertical cut slope subjected to variable rainfall infiltration . | COMPUTERS AND GEOTECHNICS , 2021 , 134 . |
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Abstract ：
为研究基坑工程钢支撑体系中活络端的偏心受压性能,建立有限元模型,经试验结果验证后,开展一系列的数值模拟,系统研究偏心距、试件的关键参数等对活络端在偏心荷载作用下的轴向承载性能和抗弯性能的影响。结果表明,活络端的偏心距不应超出箱型体外边缘;箱型体间的缀板能够有效提升活络端的抗弯性能;活络端承载性能和抗弯性能随钢楔长度、钢楔宽度、钢板厚度和箱型体长度的增加而提高;且改变钢板厚度能明显改善活络端的承载性能和抗弯性能。
Keyword ：
参数分析 参数分析 钢支撑 钢支撑 基坑工程 基坑工程 有限元分析 有限元分析 活络端 活络端 偏心受压 偏心受压
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| GB/T 7714 | 张明聚 , 谢治天 , 李鹏飞 et al. 基于有限元分析的基坑工程钢支撑活络端偏心受压性能研究 [J]. | 土木工程学报 , 2021 , 54 (10) : 106-116 . |
| MLA | 张明聚 et al. "基于有限元分析的基坑工程钢支撑活络端偏心受压性能研究" . | 土木工程学报 54 . 10 (2021) : 106-116 . |
| APA | 张明聚 , 谢治天 , 李鹏飞 , 郭彩霞 . 基于有限元分析的基坑工程钢支撑活络端偏心受压性能研究 . | 土木工程学报 , 2021 , 54 (10) , 106-116 . |
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Abstract ：
This paper focuses on the ground settlement induced by the construction of a curved shield tunnel. Ground loss and construction loadings are the two factors causing ground settlement, and two corresponding analytical models were developed. First, the ground settlement due to ground loss was analyzed based on 3D image theory. The "integrative gap at shield tail" (IGST) and overcutting gap of a curved tunnel were considered. Second, the ground settlement due to construction loadings was analyzed by modifying Mindlin's solutions. The additional thrust, frictional force, and grouting pressure were considered. Subsequently, a case study and a parameter analysis were conducted. Finally, the obtained solutions were compared with a classical analytical solution, numerical simulations, and monitored results. The proposed model could effectively predict the ground settlement induced during curved shield tunneling.
Keyword ：
U455 U455 TU744 TU744 Curved tunnel Curved tunnel Ground loss Ground loss Image theory Image theory 43 43 Ground settlement Ground settlement s solution s solution Mindlin’ Mindlin’
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| GB/T 7714 | Li, Shao-hua , Zhang, Ming-ju , Li, Peng-fei . Analytical solutions to ground settlement induced by ground loss and construction loadings during curved shield tunneling [J]. | JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A , 2021 , 22 (4) : 296-313 . |
| MLA | Li, Shao-hua et al. "Analytical solutions to ground settlement induced by ground loss and construction loadings during curved shield tunneling" . | JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A 22 . 4 (2021) : 296-313 . |
| APA | Li, Shao-hua , Zhang, Ming-ju , Li, Peng-fei . Analytical solutions to ground settlement induced by ground loss and construction loadings during curved shield tunneling . | JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A , 2021 , 22 (4) , 296-313 . |
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Abstract ：
To improve the seismic performance of subway stations built by enlarging two parallel shield tunnels, joints of special structures between prefabricated open-loop segments and cast-in-site main station structures were proposed. Experiments on the low-frequency cyclic loading of full-scale models of joints under different structural configurations were carried out. The seismic performance, such as the load-displacement hysteresis curves, skeleton curves, structural ductility, strength degradation, energy dissipation, strain of the cable-stayed bars and failure modes, were studied. The results showed that compared with the pre-embedded connector joint, the preembedded steel plate joint had advantages in terms of the mechanical stability, intensity, stiffness, energy dissipation capacity and ductility performance. However, the relative displacement between the segment and wall column of the pre-embedded steel plate joint was larger than that of the pre-embedded connector joint. Both types of joints had a full hysteretic circle, good ductility nature, energy dissipation ability, and stable elastic and elastic-plastic deformation. The cable-stayed bars did not yield in the stretch area when the joints failed. Both of the joints could meet the performance requirements of strong joints and weak components.
Keyword ：
Seismic performance Seismic performance Enlarging subway station on a shield tunnel Enlarging subway station on a shield tunnel Low frequency cyclic load Low frequency cyclic load Load-displacement hysteresis curves Load-displacement hysteresis curves Joints of special structures Joints of special structures
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| GB/T 7714 | Liu, Yi , Zhang, Mingju , Li, Pengfei et al. Experiments on the seismic performance of Y-shape joints of subway stations built by enlarging two parallel shield tunnels [J]. | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2021 , 115 . |
| MLA | Liu, Yi et al. "Experiments on the seismic performance of Y-shape joints of subway stations built by enlarging two parallel shield tunnels" . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 115 (2021) . |
| APA | Liu, Yi , Zhang, Mingju , Li, Pengfei , Wang, Binghui , Wang, Liyan , Yuan, Pingping . Experiments on the seismic performance of Y-shape joints of subway stations built by enlarging two parallel shield tunnels . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2021 , 115 . |
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Abstract ：
This paper focuses on analytical solutions of additional stresses for a curved shield tunnel. General equations of additional stress caused by construction loadings were deduced by rewritten Mindlin solutions, and additional thrust and friction force were considered. In addition, theoretical formulae of additional stress caused by soil loss were deduced based on the three-dimensional image theory, and the actual processes of synchronous grouting and over-excavation were considered. Then, by using a curved tunnel in Zhuhai City, China as a case study, the distribution laws of additional stress along the directions of advancement and circumference were investigated. Under the coaction of construction loadings and soil loss, it was found that the distributions of σx and σy along the advancement direction for curved tunnels are similar to those for straight-line tunnels. However, the soil around a curved tunnel is more likely to yield because the difference between the normal stresses in two directions is greater than that for soil around a straight-line tunnel. Additional stresses caused by soil loss along the circumferential direction for a curved tunnel were found to no longer have the characteristics of strictly axial symmetry. The values of compressive stress σx and σy at the outer side of the curved tunnel were found to be greater and smaller than those at the inner side, respectively. As the curvature radius decreases, the maximum tensile stresses σx and σy for curved tunnels were found to decrease and increase, respectively. Furthermore, an insufficient quantity of injection grouting will trigger detrimental effects to nearby structures during the approaching excavation. © 2020 Elsevier Ltd
Keyword ：
Soils Soils Shielding Shielding Mortar Mortar Compressive stress Compressive stress Concrete construction Concrete construction Friction Friction Grouting Grouting Excavation Excavation
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| GB/T 7714 | Li, Shaohua , Li, Pengfei , Zhang, Mingju . Analysis of additional stress for a curved shield tunnel [J]. | Tunnelling and Underground Space Technology , 2021 , 107 . |
| MLA | Li, Shaohua et al. "Analysis of additional stress for a curved shield tunnel" . | Tunnelling and Underground Space Technology 107 (2021) . |
| APA | Li, Shaohua , Li, Pengfei , Zhang, Mingju . Analysis of additional stress for a curved shield tunnel . | Tunnelling and Underground Space Technology , 2021 , 107 . |
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