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学者姓名：张向向
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Abstract ：
以翠屏隧道一号斜井地下联络风道为依托,采用数值模拟方法对零跨距立体交叉隧道施工全过程进行系统分析,探究零跨距立体交叉隧道受力变形特征,揭示斜井与隧道主洞的开挖顺序及开挖方式等因素的影响机制.结果表明:(1)开挖顺序对隧道受力变形特征具有显著影响,各工况下隧道变形均处于容许值内,但在"先下后上"工序下交叉区域衬砌的最大拉应力及最大压应力均小于"先上后下"工序;(2)斜井开挖方式仅对斜井主应力分布及底部变形产生影响,且斜井应力及底部变形随台阶长度增大而减小;(3)主洞开挖方式对衬砌受力变形影响作用较为显著,对交叉区域中心附近的衬砌进行加强处理,能够显著降低该区域最终阶段的应力及变形,保证施工安全.研究成果可为深埋零跨距立体交叉隧道及类似工程的安全施工提供借鉴.
Keyword ：
数值模拟 数值模拟 施工方式 施工方式 稳定性 稳定性 立体交叉隧道 立体交叉隧道 零跨距 零跨距
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| GB/T 7714 | 廖大刚 , 张向向 , 徐文杰 . 深埋零跨距立体交叉隧道稳定性及影响机制研究 [J]. | 公路 , 2025 , 70 (2) : 458-466 . |
| MLA | 廖大刚 等. "深埋零跨距立体交叉隧道稳定性及影响机制研究" . | 公路 70 . 2 (2025) : 458-466 . |
| APA | 廖大刚 , 张向向 , 徐文杰 . 深埋零跨距立体交叉隧道稳定性及影响机制研究 . | 公路 , 2025 , 70 (2) , 458-466 . |
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为获得新建盾构隧道下穿对既有运营隧道的影响规律,以厦门地铁4号线下穿既有运营公路隧道为例,利用数值模拟软件Midas GTS NX模拟盾构隧道左右线分别下穿既有运营隧道全过程,并探究下穿隧道角度等因素对运营隧道力学行为的影响,研究结果表明:随着盾构隧道不断开挖,既有隧道沉降量不断增大,但既有隧道沉降仅在盾构隧道开挖至运营隧道正下方时才会发生显著改变;既有隧道的最终沉降会随着下穿隧道角度的减小而增大.研究结果可为相似工程提供科学的参考依据.
Keyword ：
下穿 下穿 变形规律 变形规律 数值模拟 数值模拟 盾构隧道 盾构隧道 运营隧道 运营隧道
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| GB/T 7714 | 顾凯 , 张向向 , 陈必港 . 新建盾构隧道下穿对既有运营隧道的影响分析 [J]. | 土工基础 , 2025 , 39 (1) : 1-4 . |
| MLA | 顾凯 等. "新建盾构隧道下穿对既有运营隧道的影响分析" . | 土工基础 39 . 1 (2025) : 1-4 . |
| APA | 顾凯 , 张向向 , 陈必港 . 新建盾构隧道下穿对既有运营隧道的影响分析 . | 土工基础 , 2025 , 39 (1) , 1-4 . |
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Tight sandstone gas reservoirs can potentially be developed more efficiently with the use of liquid nitrogen (LN2) fracturing. In order to evaluate the effects of LN2 freeze-thaw on the physical and mechanical properties, as well as the failure behavior of sandstone, the research involved conducting a range of experiments and numerical simulations on sandstone samples subjected to various LN2 treatment conditions. The results indicated that the freeze-thaw process had a detrimental effect on the physical and mechanical properties of the sandstone, leading to varied degrees of weakening. The reduction percentages of tensile strength and fracture toughness, which are two key indicators, were found to be 14 % and 21.4 % respectively. Furthermore, there were the bigger degree of volume fracture, multiple branching and tortuous macroscopic cracks and macro fracture surface with larger roughness (increased by15 %) in the freeze-thaw sandstone after destruction. The physical mechanical properties of the freezing sandstone were significantly enhanced, but the complexity of the tensile failure path increased. Numerical simulations indicate that a large temperature gradient leads to the formation of damage zones within the sandstone matrix, and microscopic observations show a significant increase in the length and width of microcracks within the matrix. This indicates that the low temperature of LN2 fully releases the damage potential of initial defects in sandstone, the damage area participates in the formation of crack propagation paths and increases the randomness of path direction selection, which increases the degree of sandstone volume fracture. The research results are anticipated to offer a scientific foundation and data references for the efficient development of tight sandstone gas resources.
Keyword ：
Damage Damage Fracture characteristics Fracture characteristics Liquid nitrogen cooling Liquid nitrogen cooling Mechanical degradation Mechanical degradation Temperature gradient Temperature gradient
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| GB/T 7714 | Su, Shanjie , Wang, Shengcheng , Hou, Peng et al. Investigate on mechanical properties and fracture characteristics of sandstone under different liquid nitrogen treatment states [J]. | GEOENERGY SCIENCE AND ENGINEERING , 2025 , 250 . |
| MLA | Su, Shanjie et al. "Investigate on mechanical properties and fracture characteristics of sandstone under different liquid nitrogen treatment states" . | GEOENERGY SCIENCE AND ENGINEERING 250 (2025) . |
| APA | Su, Shanjie , Wang, Shengcheng , Hou, Peng , Du, Menglin , Ren, Yongjie , Teng, Teng et al. Investigate on mechanical properties and fracture characteristics of sandstone under different liquid nitrogen treatment states . | GEOENERGY SCIENCE AND ENGINEERING , 2025 , 250 . |
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Liquid nitrogen (LN2) fracturing has been proposed to be used in unconventional gas engineering, including shale reservoirs. However, the effect of LN2 cooling on the fracture behaviors of bedding shale has not been well studied. In this study, three-point bending tests were conducted on shale samples at room temperature and under LN2 cooling condition, respectively. Different bedding angles were considered in these tests. The phenomenon of acoustic emission was monitored during the fracture initiation and propagation of bedding shale. The results showed that the tensile strength, fracture toughness, bending elastic modulus and fracture energy decreased with the increase of bedding angle under the same temperature condition, but the bedding angle has no significant effect on energy storage ratio and speed. There was a linear relationship between the tensile strength and fracture toughness of bedding shale. The crack initiation was inconsistent with the loading reference line except in 90 degrees bedding shale, and then turned to the direction parallel to the loading reference line, resulting in various fracture morphology of bedding shale. The acoustic emission signals were mainly concentrated in the failure stage because of the severe brittleness of bedding shale. Under LN2 cooling condition, the tensile strength, fracture toughness, bending elastic modulus, energy storage ratio, fracture energy and AE cumulative ringing counts of bedding shale with the same bedding angle significantly increased, but the energy storage speed decreased. The crack length along bedding direction was longer and the crack inflection point was clearer than those of bedding shale at room temperature.
Keyword ：
Anisotropy Anisotropy Bedding shale Bedding shale Fracture behaviors Fracture behaviors Fracture toughness Fracture toughness Liquid-nitrogen Liquid-nitrogen Tensile strength Tensile strength Three-point bending test Three-point bending test
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| GB/T 7714 | Zhang, Xiangxiang , Wu, Shaoyan , Liu, Chengyu et al. An experimental investigation into the effect of liquid nitrogen cooling on fracture behaviors of bedding shale [J]. | THEORETICAL AND APPLIED FRACTURE MECHANICS , 2025 , 136 . |
| MLA | Zhang, Xiangxiang et al. "An experimental investigation into the effect of liquid nitrogen cooling on fracture behaviors of bedding shale" . | THEORETICAL AND APPLIED FRACTURE MECHANICS 136 (2025) . |
| APA | Zhang, Xiangxiang , Wu, Shaoyan , Liu, Chengyu , Su, Shanjie . An experimental investigation into the effect of liquid nitrogen cooling on fracture behaviors of bedding shale . | THEORETICAL AND APPLIED FRACTURE MECHANICS , 2025 , 136 . |
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In South China, due to climatic factors, highly weathered granite is distributed across a large area and easily disintegrates after encountering water, causing many geological disasters and other problems. To determine the disintegration mechanism of highly weathered granite in South China, disintegration tests were carried out on highly weathered granite in the Fuzhou area under different immersion durations, cycle times, and flow rates, with the help of a self-designed disintegration test device. Moreover, the disintegration mechanism of the highly weathered granite was revealed using nuclear magnetic resonance (NMR) technology. The results demonstrated an increase in the cumulative relative disintegration with prolonged immersion time and the number of dry-wet cycles. Beyond a certain flow rate, the cumulative relative disintegration amount stabilized. There was a strong correlation between the steady disintegration rate and immersion time (or dry-wet cycles). The disintegration process of the highly weathered granite was divided into three stages: rapid, moderate, and stable disintegration. Notably, disintegration primarily occurred around the large pores. This study revealed that the variation in the immersion time (or wet-dry-scouring cycles) was fundamentally linked to changes in the relative volume of the large pores in the rock samples. These findings provide valuable insights for predicting and mitigating surface disasters on highly weathered granite slopes.
Keyword ：
disintegration disintegration disintegration steady flow rate disintegration steady flow rate dry-wet cycles dry-wet cycles highly weathered granite highly weathered granite immersion time immersion time
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| GB/T 7714 | He, Xiyang , Liu, Chengyu , Zhang, Xiangxiang et al. Disintegration Characteristics of Highly Weathered Granite under the Influence of Scouring [J]. | WATER , 2024 , 16 (3) . |
| MLA | He, Xiyang et al. "Disintegration Characteristics of Highly Weathered Granite under the Influence of Scouring" . | WATER 16 . 3 (2024) . |
| APA | He, Xiyang , Liu, Chengyu , Zhang, Xiangxiang , Wu, Changyu , Weng, Zhiyu . Disintegration Characteristics of Highly Weathered Granite under the Influence of Scouring . | WATER , 2024 , 16 (3) . |
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To study the effect of freeze-thaw temperature change rate on the crack propagation characteristics and failure precursor in freeze-thawed sandstone, uniaxial compression tests were simultaneous monitoring for acoustic emission (AE) and microseismic (MS) signals. The results demonstrate that increased temperature change rates resulted in accelerated crack propagation, earlier rock failure, and lower brittleness; the failure mode changes from tensile to shear-tensile mixing; the proportion of tensile cracks decreases from 90.9% to 70.8%; and shear cracks increase from 9.1% to 29.2%. A comparative analysis of AE and MS provided insights into the evolution of crack propagation at multiple scales, enabling the classification of crack types and their relationship with propagation scale. Based on the precursor characteristic of the original waveform and time-domain curve in AE and MS signals, the advantageous areas of early-warming indicators for rock failure were identified. Compared with traditional indicators, the precursory indicators calculated using MS b-values and AE energy rates can obtain a larger early warning window, with maximum windows of 20.52%-29.29% and 7.09%-13.73% in high initial damage rocks and low initial damage rocks, respectively. Examined temperature change rate effects on mechanics and failure modes. Investigate multi-scale crack propagation evolution during loading using AE and MS. Crack type was classified and identified through normalization and KDE methods. The advantages field of early warning indicators for rock failure were evaluated.
Keyword ：
acoustic emission acoustic emission crack classification crack classification failure precursor failure precursor freeze-thaw temperature change rate freeze-thaw temperature change rate microseismic microseismic multiple-scale crack multiple-scale crack
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| GB/T 7714 | Zheng, Daozhe , Liu, Chengyu , Zhou, Annan et al. Multiple-scale crack propagation characteristics and failure precursor identification of freeze-thawed sandstone during loading [J]. | FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES , 2024 , 47 (8) : 2934-2954 . |
| MLA | Zheng, Daozhe et al. "Multiple-scale crack propagation characteristics and failure precursor identification of freeze-thawed sandstone during loading" . | FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 47 . 8 (2024) : 2934-2954 . |
| APA | Zheng, Daozhe , Liu, Chengyu , Zhou, Annan , Zhang, Xiangxiang , Chen, Chenghai , Huang, Shengfeng . Multiple-scale crack propagation characteristics and failure precursor identification of freeze-thawed sandstone during loading . | FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES , 2024 , 47 (8) , 2934-2954 . |
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以翠屏隧道为依托，对受溶洞影响下的零跨距立体交叉隧道施工全过程进行数值模拟，系统分析其受力变形特征，揭示了溶洞位置与尺寸对其稳定性的影响。结果表明：常规施工工法及支护条件下，不同溶洞位置与尺寸对隧道变形特征均有显著影响，但隧道整体稳定性仍然较好；溶洞位于立体交叉结构上下两侧时对隧道受力变形特征影响显著，左右两侧溶洞对隧道受力变形特征影响较小，其中位于上下两侧时位移最大增幅与降幅分别可达18%与12.7%；溶洞尺寸对近距离隧道的变形影响显著，尺寸越大对隧道变形特征的影响越剧烈。
Keyword ：
数值模拟 数值模拟 溶洞 溶洞 稳定性 稳定性 立体交叉隧道 立体交叉隧道 零跨距 零跨距
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| GB/T 7714 | 廖大刚 , 徐文杰 , 张向向 . 溶洞位置及尺寸对深埋零跨距立体交叉隧道稳定性的影响 [J]. | 福建交通科技 , 2024 , PageCount-页数: 6 (05) : 47-52 . |
| MLA | 廖大刚 et al. "溶洞位置及尺寸对深埋零跨距立体交叉隧道稳定性的影响" . | 福建交通科技 PageCount-页数: 6 . 05 (2024) : 47-52 . |
| APA | 廖大刚 , 徐文杰 , 张向向 . 溶洞位置及尺寸对深埋零跨距立体交叉隧道稳定性的影响 . | 福建交通科技 , 2024 , PageCount-页数: 6 (05) , 47-52 . |
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本文指出农光互补光伏发电系统通过在农田中布置光伏发电板的方式,有效提高了土地的资源利用率,应用前景广阔;然而作为光伏组件的支撑系统,其支架基础的选型依据和标准尚不统一.基于此,本文对比分析了农光互补光伏支架的常用基础类型,构建了支架基础选型的关键评价指标体系,并采用层次分析法对各指标进行了权重分析,探究了农光互补光伏支架的最佳基础类型.研究成果可为类似光伏系统支架选型提供科学依据和支撑.
Keyword ：
关键评价指标 关键评价指标 农光互补 农光互补 基础选型 基础选型 层次分析法 层次分析法
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| GB/T 7714 | 孙琦 , 郑川 , 王学恒 et al. 基于层次分析法的农光互补光伏支架基础选型研究 [J]. | 科技创新与生产力 , 2024 , 45 (10) : 40-45 . |
| MLA | 孙琦 et al. "基于层次分析法的农光互补光伏支架基础选型研究" . | 科技创新与生产力 45 . 10 (2024) : 40-45 . |
| APA | 孙琦 , 郑川 , 王学恒 , 季晓龙 , 张向向 . 基于层次分析法的农光互补光伏支架基础选型研究 . | 科技创新与生产力 , 2024 , 45 (10) , 40-45 . |
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Water-rock interactions and scouring actions are recognized key factors that significantly influence the disintegration of rock on the surface of slopes. However, the research on rock disintegration, specifically under the action of scouring, is limited, which makes it difficult to understand the characteristics of rock disintegration. Therefore, in this study disintegration tests were performed on the gypsum karst breccia collected from the Zhoukoudian site in Beijing, using a self-made disintegration test device. Further, this study investigated the impact of solution pH, flow velocity, and the number of cycles on the characteristics of rock disintegration. The changes in pore structure, microstructure, and mineral composition of the rock were analyzed using nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and inductively coupled plasma optical emission spectrometer (ICP-OES) methods. The findings reveal that the cumulative relative disintegration amount of the gypsum karst breccia experiences an increase as the pH value of the soaking solution decreases and the number of cycles increases. Once a specific flow rate is attained, the cumulative relative disintegration amount stabilizes (about 73%) and no longer exhibits significant changes. This phenomenon signifies the presence of a stabilizing flow rate for disintegration. The stable flow rate concerning rock disintegration is influenced by both the solution's pH and the number of cycles. Following acid contamination, the rock sample's particle morphology undergoes disruption, leading to the dissolution of cement. This, in turn, leads to an augmented release of Ca2+, Al3+, and Ma2+ ions in the solution, intensifying the disintegration of the rock samples. Conversely, alkali contamination prompts secondary cementation, mitigating localized damage. This results in a marginal increase in the calcite content within the rock samples (from 15.3% to 19.2%), while the release of Ca2+ in the solution experiences a decrease. Additionally, there is a slight increase in the release of Al3+ (a maximum increase of 1.71 mg/L), which minimally inhibits the disintegration of the rock samples. Notably, the rock disintegration predominantly occurs around macropores, and the effect of solution pH on the disintegration characteristics and stable flow rate is primarily due to the changes in the relative proportion of macropore volume in the rock samples. The findings of this study have significant implications for the prediction and control of slope-related issues.
Keyword ：
disintegration disintegration gypsum karst breccia gypsum karst breccia stable flow rate of disintegration stable flow rate of disintegration the pH of solution the pH of solution
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| GB/T 7714 | He, Xiyang , Liu, Chengyu , Zhang, Xiangxiang et al. Effects of pH on Disintegration Characteristics of Gypsum Karst Breccia under Scouring Action [J]. | MINERALS , 2023 , 13 (10) . |
| MLA | He, Xiyang et al. "Effects of pH on Disintegration Characteristics of Gypsum Karst Breccia under Scouring Action" . | MINERALS 13 . 10 (2023) . |
| APA | He, Xiyang , Liu, Chengyu , Zhang, Xiangxiang , Wu, Changyu , Weng, Zhiyu . Effects of pH on Disintegration Characteristics of Gypsum Karst Breccia under Scouring Action . | MINERALS , 2023 , 13 (10) . |
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The failure of ancient rock ruins is affected by freeze-thaw cycles is an important phenomenon in cold region. The degree of freeze-thaw damage be significantly influenced and show an obvious difference during the complex solution environments. However, few studies have been conducted to investigate the combined effects of complex solution environments and freeze-thaw (F-T) cycles to the crack propagation mechanism of loading freezethawed sandstones. To study the coupling effects of complex solution environments and freeze-thaw on argillaceous sandstone in ancient ruins, the physical and mechanical properties were investigated through weighing tests, ultrasonic tests, and uniaxial compression tests. The complete failure process of each sample was concurrently monitored using a combination of AE and MS techniques. The crack propagation mechanism at different scales was systematacially investigated through a comparative analysis of microseismic (MS) and acoustic emission (AE) signal characteristics. Additionally, the orthogonal test was designed to effectively analyse the sensitivity of the primary influencing factors to freeze-thawed damage. The findings indicate that:(1) NaCl concentration influences the frost heave force and salt crystallization pressure. While pH levels impact the integrity of the rock structure, leading to significant changes in volume expansion and frost heave force. These aspects are regarded as the main causes of sandstone softening. (2) Compared to the NaCl concentration, varying pH have a more pronounced effect on the freeze-thawed damage. (3) The micro-cracks propagation during loading process is classified into three stages: initial compaction, incubation, and rapid propagation. The macrocracks propagation is divided into two stages: uniform propagation and rapid propagation. With the increase of NaCl concentration and acidity of solution, the relative duration of incubation in micro-cracks propagation decreased, while the relative duration of uniform propagation in macro-cracks increased. When NaCl concentration and acidity surpass a specific threshold, both the micro-cracks and macro-cracks rapidly propagate from the beginning of the loading process.
Keyword ：
Acoustic emission and microseismic properties Acoustic emission and microseismic properties Crack propagation Crack propagation Damage mechanism Damage mechanism Freeze -thaw cycles Freeze -thaw cycles Sensitivity analysis Sensitivity analysis Solution environment Solution environment
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| GB/T 7714 | Zheng, Daozhe , Liu, Chengyu , Zhang, Xiangxiang et al. Combined effects of solution environment and freeze-thaw cycling on the crack propagation characteristics in sandstone during loading [J]. | COLD REGIONS SCIENCE AND TECHNOLOGY , 2023 , 217 . |
| MLA | Zheng, Daozhe et al. "Combined effects of solution environment and freeze-thaw cycling on the crack propagation characteristics in sandstone during loading" . | COLD REGIONS SCIENCE AND TECHNOLOGY 217 (2023) . |
| APA | Zheng, Daozhe , Liu, Chengyu , Zhang, Xiangxiang , Huang, Shengfeng , Chen, Chenghai , Yuan, Yeqing . Combined effects of solution environment and freeze-thaw cycling on the crack propagation characteristics in sandstone during loading . | COLD REGIONS SCIENCE AND TECHNOLOGY , 2023 , 217 . |
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