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Large-scale model test study on the water pressure resistance of construction joints of karst tunnel

《结构与土木工程前沿（英文）》   页码 1249-1263 doi: 10.1007/s11709-023-0974-x

摘要： Model tests and numerical calculations were adopted based on the New Yuanliangshan tunnel project to investigate the water pressure resistance of lining construction joints in high-pressure and water-rich karst tunnels. A large-scale model test was designed and conducted, innovatively transforming the external water pressure of the lining construction joint into internal water pressure. The effects of the embedded position and waterstop type on the water pressure resistance of the construction joint were analyzed, and the reliability of the model test was verified via numerical calculations. The results show that using waterstops can significantly improve the water pressure resistance of lining construction joints. The water pressure resistance of the lining construction joint is positively correlated with the lining thickness and embedded depth of the waterstop. In addition, the type of waterstop significantly influences the water pressure resistance of lining construction joints. The test results show that the water pressure resistance of the embedded transverse reinforced waterstop is similar to that of the steel plate waterstop, and both have more advantages than the rubber waterstop. The water pressure resistance of the construction joint determined via numerical calculations is similar to the model test results, indicating that the model test results have high accuracy and reliability. This study provides a reference for similar projects and has wide applications.

关键词： karst tunnel     lining construction joint     water pressure resistance     large-scale model test     numerical calculations    

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Metagenomic analysis on resistance genes in water and microplastics from a mariculture system

《环境科学与工程前沿（英文）》 2022年 第16卷 第1期   页码 4-4 doi: 10.1007/s11783-021-1438-y

摘要：

Microplastics existing widely in different matrices have been regarded as a reservoir for emerging contaminants. Mariculture systems have been observed to host microplastics and antibiotic resistance genes (ARGs). However, more information on proliferation of ARGs and metal resistance genes (MRGs) in mariculture system at the presence of microplastics is needed.

关键词： Antibiotic resistance genes     Metal resistance genes     Metagenomic analysis     Microplastics     Mariculture    

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Urotensin II receptor antagonist reduces hepatic resistance and portal pressure through enhanced eNOS-dependent

Ruoxi Zhang, Jing Chen, Diangang Liu, Yu Wang

《医学前沿（英文）》 2019年 第13卷 第3期   页码 398-408 doi: 10.1007/s11684-019-0689-5

摘要： Increased serum urotensin II (UII) levels in human cirrhotic populations have been recently shown, but the long-term effects of UII receptor antagonist on the cirrhosis have not been investigated. To investigate the therapeutic effects of urotensin II receptor (UT) antagonist palosuran on rats with carbon tetrachloride (CCl )-induced cirrhosis, the hepatic and systemic hemodynamics, liver fibrosis, the metalloproteinase-13 (MMP-13)/ tissue inhibitor of metalloproteinase-1 (TIMP-1) ratio, hepatic Rho-kinase activity, and the endothelial nitric oxide synthase (eNOS) activity are measured in CCl -cirrhotic rats treated with palosuran or vehicle for 4 weeks. Primary hepatic stellate cells (HSCs) are used to investigate the changes in UII/UT expression and the effect of palosuran. Compared with the vehicle-treated cirrhotic rats, treatment with palosuran can reduce the portal pressure (PP), decrease the risk of liver fibrosis and the level of α smooth muscle actin, collagen-I (COL-I), and transforming growth factor β expression. However, treatment with palosuran can increase MMP-13/TIMP-1, p-vasodilator-stimulated phosphoprotein (p-VASP), and p-eNOS expression. Moreover, UII/UT mRNA expression increases during HSC activation. MMP-13/TIMP-1, COL-I, and p-VASP are inhibited after palosuran treatment. Our data indicate that long-term administration of palosuran can decrease PP in cirrhosis, which results from decreased hepatic fibrosis and enhanced eNOS-dependent HSC vasodilatation.

关键词： portal hypertension     cirrhosis     urotensin II     palosuran     hepatic stellate cell    

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the ultraviolet/chlorine process on microbial community structure, typical pathogens, and antibiotic resistancegenes in reclaimed water

《环境科学与工程前沿（英文）》 2022年 第16卷 第8期 doi: 10.1007/s11783-022-1521-z

摘要：

• UV/chlorine can effectively remove VBNC pathogens, ARGs and MGEs in reclaimed water.

关键词： UV/chlorine process     Pathogen     Antibiotic resistance genes     High-throughput qPCR     Reclaimed water    

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Assessment of antibiotic resistance genes in dialysis water treatment processes

Xuan Zhu, Chengsong Ye, Yuxin Wang, Lihua Chen, Lin Feng

《环境科学与工程前沿（英文）》 2019年 第13卷 第3期 doi: 10.1007/s11783-019-1136-1

摘要：

• Quantitative global ARGs profile in dialysis water was investigated.

• Totally 35 ARGs were found in the dialysis treatment train.

• 29 ARGs (highest) were found in carbon filtration effluent.

• erm and mtrD-02 occurred in the final effluent.

• The effluent was associated with health risks even after RO treatment.

关键词： Dialysis water     Treatment process     Antibiotic resistance gene     High-throughput quantitative PCR     Horizontal gene transfer    

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Presence, dissemination and removal of antibiotic resistant bacteria and antibiotic resistance genesin urban drinking water system: A review

Qiaowen Tan, Weiying Li, Junpeng Zhang, Wei Zhou, Jiping Chen, Yue Li, Jie Ma

《环境科学与工程前沿（英文）》 2019年 第13卷 第3期 doi: 10.1007/s11783-019-1120-9

摘要：

Reviewed the change of ARGs and ARB in full-scale urban drinking water systems.

Conventional processes are more promising than BAC process in ARGs removal.

Mechanisms of ARGs enrichment and spread in BAC filter and DWDSs are discussed.

Raise the need of future research on ARGs and ARB change in building plumbing systems.

关键词： Antibiotic resistant bacteria     Antibiotic resistance genes     Water source     Drinking water treatment plant     Drinking water distribution system     Urban drinking water system    

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厦门翔安海底隧道衬砌水压力特征研究

程正明

《中国工程科学》 2012年 第14卷 第11期   页码 29-35

摘要：

合理确定衬砌水压力是海底隧道结构设计的关键所在。采用复变函数和地下水动力学理论，推导了圆形海底隧道衬砌外水压力解析法计算公式，经对比验证，精度高、适用性广。通过海底隧道水压力模型试验研究得到，全封堵防水方式下，衬砌背后水压不能折减；限量排放时，衬砌背后水压力随排水量的增加而减小，建立了限量排放下的水压力计算公式，得到现场实测结果验证。研究成果应用于国内第一条海底隧道──厦门翔安海底隧道，为“以堵为主、限量排放”的支护结构设计和海底风化槽地段注浆堵水方案的制订提供了关键技术参数，现场应用成效良好。相关研究成果对后续海底隧道工程具有一定借鉴意义。

关键词： 海底隧道     衬砌     水压力     模型试验     限量排放     折减    

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Influence of reclaimed water discharge on the dissemination and relationships of sulfonamide, sulfonamideresistance genes along the Chaobai River, Beijing

Ning Zhang, Xiang Liu, Rui Liu, Tao Zhang, Miao Li, Zhuoran Zhang, Zitao Qu, Ziting Yuan, Hechun Yu

《环境科学与工程前沿（英文）》 2019年 第13卷 第1期 doi: 10.1007/s11783-019-1099-2

摘要：

Reclaimed water threatens the ecological safety of the Chaobai River.

SMX, TMP, and SDZ were the first three abundant antibiotics in the research area.

SRGs and intI1 were widespread with high abundance after reclaimed water recharge.

The SRGs values followed the sequence: Summer>autumn>spring>winter.

Strong correlations were detected between SRGs and environmental factors.

关键词： Sulfonamide residues     Sulfonamide resistance genes     Reclaimed water recharge     Surface water     Class one integrons    

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Bacteriophages in water pollution control: Advantages and limitations

《环境科学与工程前沿（英文）》 2021年 第15卷 第5期 doi: 10.1007/s11783-020-1378-y

摘要：

•Phages can be better indicators of enteric viruses than fecal indicator bacteria.

关键词： Phage     Water pollution monitoring     Harmful bacteria biocontrol     Horizontal gene transfer     Bacterial resistance    

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Local resistance of fluid flow across sudden contraction in small channels

Hang GUO, Ling WANG, Jian YU, Fang YE, Chongfang MA, Zhuo LI,

《能源前沿（英文）》 2010年 第4卷 第2期   页码 149-154 doi: 10.1007/s11708-009-0060-7

摘要： The pressure drop caused by flow area contraction in microchannels has been experimentally studied in this paper using the tiny gap pressure measurement method. The working fluid was deionized water at room temperature at near-atmospheric pressure. Three test sections with area ratios of 0.284 and 0.274 and at different tube diameter sizes were used. The experimental results show that the abrupt contraction coefficient decreases with the Reynolds number increasing, and it is much higher than that of conventional tubes in laminar flow. The widely-applied correlation =0.5(1−) could not predict the contraction coefficient of turbulent flow in the micro tubes. The decreases as the tube diameter increases. The transition from laminar to turbulent flow is not obvious when the diameter of the small tube is 0.32mm.

关键词： microchannels     pressure drop     abrupt contraction     loss coefficients    

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Modeling of coal swelling induced by water vapor adsorption

Zhejun PAN

《化学科学与工程前沿（英文）》 2012年 第6卷 第1期   页码 94-103 doi: 10.1007/s11705-011-1172-2

摘要： Gas adsorption-induced coal swelling is a well-know phenomenon. Coal swelling or shrinkage by adsorption or desorption of water vapor has not been well understood but has significant implications on gas drainage process for underground coal mining and for primary and enhanced coalbed methane production. Decreased matrix moisture content leads to coal shrinkage and thus the change of cleat porosity and permeability under reservoir conditions. Unlike gas adsorption in coal which usually forms a single layer of adsorbed molecules, water vapor adsorption in the coal micropores forms multilayer of adsorbed molecules. In this work, a model has been developed to describe the coal swelling strain with respect to the amount of moisture intake by the coal matrix. The model extended an energy balance approach for gas adsorption-induced coal swelling to water vapor adsorption-induced coal swelling, assuming that only the first layer of adsorbed molecules of the multilayer adsorption changes the surface energy, which thus causes coal to swell. The model is applied to describe the experimental swelling strain data measured on an Australian coal. The results show good agreement between the model and the experimental data.

关键词： multilayer adsorption     vapour pressure     coal shrinkage     relative humidity     permeability    

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节能环保工程水压爆破研究与应用

何广沂,段昌炎,荆山,王太超

《中国工程科学》 2003年 第5卷 第9期   页码 43-48

摘要：

节能环保工程水压爆破是一种新的爆破技术，文章主要介绍该项技术提高炸药能量利用率和保护环境的理论分析和模拟试验，着重是创新突破点、关键技术和实际应用所取得的显著技术经济效果。

关键词： 工程水压爆破     模拟试验     能量利用率    

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高压富水充填溶腔释能降压技术

张梅,张民庆,朱鹏飞,黄鸿健

《中国工程科学》 2009年 第11卷 第12期   页码 13-19

摘要：

高压富水充填溶腔具有水量大、水压高、规模范围大、充填介质复杂的特征，工程施工风险极高，采用传统的注浆法进行处理，受地层的不均一性、材料选择、技术水平的影响，难免会出现注浆盲区，施工中一旦注浆盲区被高压水击穿，将会发生大规模突水突泥，造成灾害。针对宜万铁路所遇到的高压富水充填溶腔，通过科技攻关，提出采取释能降压新技术进行处治。经现场实践，安全、经济、可靠，并取得了成功。释能降压技术是针对高压富水充填溶腔采取有计划、有目的的精确爆破揭示，从而释放溶腔所存储的能量，降低施工及运营过程中水土压力对隧道形成影响，之后，通过配套处治措施完成溶腔治理。

关键词： 高压富水充填溶腔     释能降压技术     精确爆破     安全设计    

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Fate and risk assessment of emerging contaminants in reclaimed water production processes

《环境科学与工程前沿（英文）》 2021年 第15卷 第5期 doi: 10.1007/s11783-021-1392-8

摘要：

• PPCPs had the highest removal efficiency in A2O combined with MBR process (86.8%).

关键词： Trace organic pollution     Antibiotic resistance genes     Reclaimed wastewater     Sludge     Risk assessment     Mass load    

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polyamide reverse osmosis membranes with temperature-responsive intelligent nanocontainers for chlorine resistance

《化学科学与工程前沿（英文）》 2023年 第17卷 第9期   页码 1183-1195 doi: 10.1007/s11705-022-2287-3

摘要： Improving the performance of reverse osmosis membranes remains great challenge to ensure excellent NaCl rejection while maintaining high water permeability and chlorine resistance. Herein, temperature-responsive intelligent nanocontainers are designed and constructed to improve water permeability and chlorine resistance of polyamide membranes. The nanocontainer is synthesized by layer-by-layer self-assembly with silver nanoparticles as the core, sodium alginate and chitosan as the repair materials, and polyvinyl alcohol as the shell. When the polyamide layer is damaged by chlorine attack, the polyvinyl alcohol shell layer dissolves under temperature stimulation of 37 °C, releasing inner sodium alginate and chitosan to repair broken amide bonds. The polyvinyl alcohol shell responds to temperature in line with actual operating environment, which can effectively synchronize the chlorination of membranes with temperature response and release inner materials to achieve self-healing properties. With adding temperature-responsive intelligent nanocontainers, the NaCl rejection of thin film composite membrane decreased by 15.64%, while that of thin film nanocomposite membrane decreased by only 8.35% after 9 chlorination cycles. Effective repair treatment and outstanding chlorine resistance as well as satisfactory stability suggest that temperature-responsive intelligent nanocontainer has great potential as membrane-doping material for the targeted repair of polyamide reverse osmosis membranes.

关键词： reverse osmosis     nanocontainer     self-healing     chlorine resistance     water permeability    

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标题 作者 时间 类型 操作

Large-scale model test study on the water pressure resistance of construction joints of karst tunnel

期刊论文

Metagenomic analysis on resistance genes in water and microplastics from a mariculture system

期刊论文

Urotensin II receptor antagonist reduces hepatic resistance and portal pressure through enhanced eNOS-dependent

Ruoxi Zhang, Jing Chen, Diangang Liu, Yu Wang

期刊论文

the ultraviolet/chlorine process on microbial community structure, typical pathogens, and antibiotic resistancegenes in reclaimed water

期刊论文

Assessment of antibiotic resistance genes in dialysis water treatment processes

Xuan Zhu, Chengsong Ye, Yuxin Wang, Lihua Chen, Lin Feng

期刊论文

Presence, dissemination and removal of antibiotic resistant bacteria and antibiotic resistance genesin urban drinking water system: A review

Qiaowen Tan, Weiying Li, Junpeng Zhang, Wei Zhou, Jiping Chen, Yue Li, Jie Ma

期刊论文

厦门翔安海底隧道衬砌水压力特征研究

程正明

期刊论文

Influence of reclaimed water discharge on the dissemination and relationships of sulfonamide, sulfonamideresistance genes along the Chaobai River, Beijing

Ning Zhang, Xiang Liu, Rui Liu, Tao Zhang, Miao Li, Zhuoran Zhang, Zitao Qu, Ziting Yuan, Hechun Yu

期刊论文

Bacteriophages in water pollution control: Advantages and limitations

期刊论文

Local resistance of fluid flow across sudden contraction in small channels

Hang GUO, Ling WANG, Jian YU, Fang YE, Chongfang MA, Zhuo LI,

期刊论文

Modeling of coal swelling induced by water vapor adsorption

Zhejun PAN

期刊论文

节能环保工程水压爆破研究与应用

何广沂,段昌炎,荆山,王太超

期刊论文

高压富水充填溶腔释能降压技术

张梅,张民庆,朱鹏飞,黄鸿健

期刊论文

Fate and risk assessment of emerging contaminants in reclaimed water production processes

期刊论文

polyamide reverse osmosis membranes with temperature-responsive intelligent nanocontainers for chlorine resistance

期刊论文