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既有盾构隧道抬升模型试验研究

现代隧道技术 2024年第1期61卷 200-207,215页

作者：曾毅高越吴沛霖张小龙付艳斌上海市隧道工程轨道交通设计研究院上海200235 深圳大学土木与交通工程学院深圳518060 深圳大学滨海城市韧性基础设施教育部重点实验室深圳518060

隧道抬升纠偏是治理隧道沉降的有效办法,但抬升纠偏易导致收敛过大,引起隧道二次损伤。鉴于此,设计一种既有盾构隧道抬升模型试验系统,通过设置独立的纵向接头进行纵向结构模拟,以考虑隧道纵向接头对整体刚度的削减作用。综合考虑顶升... 详细信息

隧道抬升纠偏是治理隧道沉降的有效办法,但抬升纠偏易导致收敛过大,引起隧道二次损伤。鉴于此,设计一种既有盾构隧道抬升模型试验系统,通过设置独立的纵向接头进行纵向结构模拟,以考虑隧道纵向接头对整体刚度的削减作用。综合考虑顶升量大小、抬升角度、截面刚度等影响因素,研究在抬升纠偏时隧道的竖向位移与截面变化规律。结果表明:低于45°的抬升角可避免隧道在抬升过程中产生过大变形;抬升位置靠近隧道纵向接头时,抬升主动环与相邻被动环的位移差将降低,隧道纵向位移曲线变缓;增设内部支撑可以促使隆起模式从断面变形过渡到整体隆起。

关键词：既有盾构隧道定量纠偏隧道抬升模型试验压密注浆

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隧道及地下工程低碳可持续发展现状与思考

现代隧道技术 2024年第2期61卷 5-17页

作者：陈湘生何秋凤吴泽洲付艳斌陈坤阳极端环境岩土和隧道工程智能建养全国重点实验室深圳518060 海城市韧性基础设施教育部重点实验室(深圳大学) 深圳518060 深圳大学中澳BIM与智慧建造联合研究中心深圳518060 深圳大学土木与交通工程学院深圳518060

隧道及地下工程是我国工程建设行业的重要部分,厘清我国隧道及地下工程的可持续发展现状和面临的关键挑战,对抓住行业高质量发展的破解点、赋能行业绿色升级具有重要意义。对此,文章首先回顾了隧道及地下工程可持续发展的相关政策和发... 详细信息

隧道及地下工程是我国工程建设行业的重要部分,厘清我国隧道及地下工程的可持续发展现状和面临的关键挑战,对抓住行业高质量发展的破解点、赋能行业绿色升级具有重要意义。对此,文章首先回顾了隧道及地下工程可持续发展的相关政策和发展历程,探索行业可持续发展的关键转折点。其次,基于全寿命周期视角,阐述了我国隧道及地下工程在统筹规划、绿色材料应用、绿色施工工法、智能低碳运维、工程废料资源化利用六个方面的可持续发展现状。最后,提出我国隧道及地下工程可持续发展面临的挑战,并给出相应的建议:(1)借助数字化技术,突破规划信息不全面壁垒;(2)持续研究新材料,增强结构抗扰性和防水性;(3)结合数字孪生技术,提升施工工序智能化水平;(4)基于工程物联网,加强工程监测智能化感知;(5)改良工艺和设备,提高建废利用率和附加值。研究以期为我国工程建设行业实现产业增值和绿色发展的良性循环提供有用的见解。

关键词：隧道及地下工程可持续发展统筹规划绿色建材绿色施工智能运维资源化利用

Clogging of slurry-shield tunnel-boring machine drives in sedimentary soft rock:A case study

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Frontiers of Structural and Civil Engineering 2023年第10期17卷 1502-1516页

作者： Chengyong CAO Xiangsheng CHEN Chenghua SHI yanbin fu Chenjie GONG Zuxian WANG College of Civil and Transportation Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Coastal Urban Resilient Infrastructures of Ministry of Education Shenzhen UniversityShenzhen 518060China School of Civil Engineering Central South UniversityChangsha 410075China

This paper presents a case study of the clogging of a slurry-shield tunnel-boring machine(TBM)experienced during tunnel operations in clay-rich argillaceous siltstones under the Ganjiang River,*** clogging experienced during tunneling was due to special geological conditions,which had a considerably negative impact on the slurry-shield TBM tunneling *** this case study,the effect of clogging on the slurry-shield TBM tunneling performance(e.g.,advance speed,thrust,torque,and penetration per revolution)was fully *** potential for clogging during tunnel operations in argillaceous siltstone was estimated using an existing empirical classification *** improvement measures have been proposed to mitigate the clogging potential of two slurry-shield TBMs during tunneling,such as the use of an optimum cutting wheel,a replacement cutting tool,improvements to the circulation flushing system and slurry properties,mixed support integrating slurry,and compressed air to support the excavation *** mechanisms and potential causes of clogging are explained in detail,and the contributions of these mitigation measures to tunneling performance are *** investigating the actual operational parameters of the slurry-shield TBMs,these mitigation measures were proven to be effective in mitigating the clogging potential of slurry-shield *** case study provides valuable information for slurry-shield TBMs involving tunneling in clay-rich sedimentary rocks.

关键词： slurry-shield TBM geological investigation clogging argillaceous siltstone TBM performance mitigation measures

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城市轨道交通基础设施隐含碳排放研究综述

现代隧道技术 2024年第4期61卷 1-13页

作者：陈湘生陈坤阳邱桐王雷何秋凤赖亚妮陈武雄付艳斌深圳大学土木与交通工程学院未来地下城市研究院深圳518061 滨海城市韧性基础设施教育部重点实验室(深圳大学) 深圳518060 深圳市地铁地下车站绿色高效智能建造重点实验室深圳518060 深圳中建院建筑科技有限公司深圳518057

城市轨道交通基础设施碳排放的定量研究已经成为交通运输领域低碳建设的关注焦点。以Web of Science(WOS)核心数据库和中国知网数据库为基础,对城市轨道交通基础设施碳排放的定量研究进行系统性综述与分析,从研究方法和影响因素2个方面... 详细信息

城市轨道交通基础设施碳排放的定量研究已经成为交通运输领域低碳建设的关注焦点。以Web of Science(WOS)核心数据库和中国知网数据库为基础,对城市轨道交通基础设施碳排放的定量研究进行系统性综述与分析,从研究方法和影响因素2个方面对样本文献进行深入分析与归纳,共涉及4种类型基础设施的碳排放,具体包括地铁系统(包括隧道和车站)、轻轨系统、市域快速轨道交通系统和有轨电车系统。首先对关于碳排放计算的文献的研究方法、目标与范围界定、功能单位和清单数据进行比较,确定研究方法的适用范围,并对数据来源进行分类;其次,确定并分析影响城市轨道交通基础设施隐含碳排放的关键因素;最后,讨论现有研究的不足。研究结果可为城市轨道交通基础设施碳排放核算标准化提供参考。

关键词：城市轨道交通基础设施生命周期评价隐含碳排放影响因素

Extreme drought with seasonal timing consistently promotes CH_(4) uptake through inconsistent pathways in a temperate grassland, China

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Journal of Arid Land 2024年第6期16卷 768-778页

作者： ZHANG Wenwen PAN Yue WEN fuqi fu Juanjuan HAO yanbin HU Tianming YANG Peizhi College of Grassland Agriculture Northwest A&F UniversityYangling 712100China Binzhou Institute of Technology Weiqiao-UCAS(University of Chinese Academy of Sciences)Science and Technology ParkBinzhou 256606China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China

Methane(CH_(4))is a potent greenhouse gas that has a substantial impact on global warming due to its substantial influence on the greenhouse *** extreme precipitation events,such as drought,attributable to global warming that caused by greenhouse gases,exert a profound impact on the intricate biological processes associated with CH_(4) ***,the timing of extreme drought occurrence emerges as a pivotal factor influencing CH_(4) uptake,even when the degree of drought remains ***,it is still unclear how the growing season regulates the response of CH_(4) uptake to extreme *** an effort to bridge this knowledge gap,we conducted a field manipulative experiment to evaluate the impact of extreme drought on CH_(4) uptake during early,middle,and late growing stages in a temperate steppe of Inner Mongolia Autonomous Region,*** result showed that all extreme drought consistently exerted positive effects on CH_(4) uptake regardless of seasonal ***,the magnitude of this effect varied depending on the timing of season,as evidenced by a stronger effect in early growing stage than in middle and late growing ***,the pathways of CH_(4) uptake were different from seasonal *** drought affected soil physical-chemical properties and aboveground biomass(AGB),consequently leading to changes in CH_(4) *** structural equation model showed that drought both in the early and middle growing stages enhanced CH_(4) uptake due to reduced soil water content(SWC),leading to a decrease in NO_(3)–-N and an increase in pmoA ***,drought in late growing stage primarily enhanced CH_(4) uptake only by decreasing *** results suggested that seasonal timing significantly contributed to regulate the impacts of extreme drought pathways and magnitudes on CH_(4) *** findings can provide substantial implications for understanding how extreme droughts affect CH_(4) uptake and improve the prediction of

关键词： extreme climate greenhouse gas methane methanotrophs soil inorganic nitrogen

Polynomial-Time Key-Recovery Attacks Against NTRURe Encrypt from ASIACCS'15

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Journal of Systems Science & Complexity 2024年第3期37卷 1308-1325页

作者： LIU Zhen PAN yanbin ZHENG Jinwei School of Cyber Science and Technology Hubei Key Laboratory of Applied MathematicsHubei UniversityWuhan 430062China Key Laboratory of Mathematics Mechanization Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100190China

In ASIACCS 2015, Nu nez, et al. proposed a proxy re-encryption scheme, named NTRURe Encrypt, based on NTRU, which allows a proxy to translate ciphertext under the delegator’s public key into a re-encrypted ciphertext that can be decrypted correctly by delegatee’s private key. Because of the potential resistance to quantum algorithm, high efficiency and various applications in real life,NTRURe Encrypt has drawn lots of attention and its security has been widely discussed and *** PQCrypto2019, Liu, et al. proposed two key recovery attacks against it. However, their first attack heavily relies on a weaken decryption oracle, and the second attack needs to collect about 260ciphertexts from the same message by theoretical analysis, which makes both of the attacks unrealistic. In this paper, inspired by the broadcast attack against NTRU, the authors find out that for NTRURe Encrypt the delegator and the delegatee can efficiently recover each other’s private key in polynomial time without any unrealistic assumptions. In addition, the authors also show how to fix NTRURe Encrypt to resist the proposed attacks. As a by-product, the authors also show how to commit broadcast attacks against NTRU 2001 with even dg, which was thought infeasible before.

关键词： Broadcast attack key recovery NTRU NTRUReEncrypt

The role of m^(6)A RNA methylation in autoimmune diseases: Novel therapeutic opportunities

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Genes & Diseases 2024年第1期11卷 252-267页

作者： Yunan Shan Wei Chen yanbin Li The First Clinical Medical College Shandong University of Traditional Chinese MedicineJinanShandong 250013China Department of Neurology The First Affiliated Hospital of Shandong First Medical University&Shandong Provincial Qjanfoshan HospitalShandong Institute of NeuroimmunologyShandong Key Laboratory of Rheumatic Disease and Translational MedicineJinanShandong 250013China Department of Gastroenterology Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200233China

N6-methyladenosine m^(6)A modifications,as one of the most common forms of in-ternal RNA chemical modifications in eukaryotic cells,have gained increasing attention in recent *** m^(6)A RNA modifications exert various crucial roles in various biological pro-cesses,such as embryonic development,neurogenesis,circadian rhythms,and *** advances have highlighted that m^(6)A RNA modification plays an important role in im-mune response,especially in the initiation and progression of autoimmune *** this re-view,we summarized the regulatory mechanisms of m^(6)A methylation and its biological functions in the immune system and mainly focused on recent progress in research on the po-tential role of m^(6)A RNA methylation in the pathogenesis of autoimmune diseases,thus providing possible biomarkers and potential targets for the prevention and treatment of auto-immunediseases.

关键词： Adaptive immunity Autoimmune diseases Innate immunity Immune response m^(6)A RNA methylation

A simple photochemical method for surface fluorination using perfluoroketones

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Chinese Chemical Letters 2024年第5期35卷 254-258页

作者： Zhiwei Zhong yanbin Huang Wantai Yang Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

Surface fluorination of conventional polymers can give them desirable surface properties similar to the expensive and difficult-to-process ***,traditional surface fluorination techniques often require toxic reagents and special ***,we report a simple and effective polymer surface fluorination method by using safe and inexpensive perfluoro-2-methyl-3-pentanone(PFMP,C_(2)F_(5)C(=O)CF(CF_(3))_(2))and UV *** method is applicable to various polymer materials,and generates nanometer-thick fluorinated layer on the outermost surface,significantly changing their surface properties without changing the surface morphology.

关键词： Surface fluorination Perfluoroketone UV irradiation Photochemistry Surface free energy

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软土卸荷时效性及其孔隙水压力变化试验研究

岩石力学与工程学报 2009年第A01期28卷 3244-3249页

作者：付艳斌朱合华杨骏深圳大学土木工程学院广东深圳518060 同济大学地下建筑与工程系上海200092 深圳地铁有限公司广东深圳518026

采用英国GDS公司生产的STDTTS+UNSAT(7kN/1700kPa)型号三轴测试系统,对上海淤泥质软土进行一系列室内试验研究,系统地探讨基坑不同区域的卸荷时效性特性及其孔压变化规律。试验结果表明,软土卸荷后蠕变可出现3个阶段:衰减蠕变、等速蠕... 详细信息

采用英国GDS公司生产的STDTTS+UNSAT(7kN/1700kPa)型号三轴测试系统,对上海淤泥质软土进行一系列室内试验研究,系统地探讨基坑不同区域的卸荷时效性特性及其孔压变化规律。试验结果表明,软土卸荷后蠕变可出现3个阶段:衰减蠕变、等速蠕变、加速蠕变。当应力水平较低时,蠕变曲线只出现蠕变的第1阶段;当卸荷应力水平增大到一定值时,蠕变曲线出现第1,2阶段;当应力水平较高时,变形急剧增加,土样很快就出现破坏。但不会出现从蠕变的第2阶段(等速蠕变阶段)直接过渡到蠕变第3阶段(加速蠕变阶段)的情况。孔压系数随时间而变化,并不是常数。卸荷时基坑不同区域孔压均减小,然后在不排水蠕变阶段逐渐增加到最大值,此时基坑安全系数达到最小。

关键词：土力学基坑卸荷时效性孔隙水压力