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Journal of Earth Science 2024年

作者： WANG Xu GE Qi lü Chengcheng SHU Junwei SUN Hongyue Sino-Italy Ningbo Ecological Park Holding Group Co. ltd Ocean College Zhejiang University College of Civil Engineering and Architecture Zhejiang University School of Civil Engineering Nanjing Forestry University

A new self-starting drainage anchor that combines prestressed anchor cables with self-starting drainage is proposed. The novelty of the self-starting drainage method is the realization of the drainage and anchoring in the one inclined borehole. Reduction in the number of boreholes can greatly decrease the construction cost and duration of the project. The adverse effect of drilling construction disturbance on the slope is reduced. To tackle the possible blockage of the drainage cavity due to slurry leakage during the solidification process after finishing grouting in the blocking section. To this end， a theoretical equation for the slurry diffusion radius under slurry self-weight pressure boundary conditions is deduced. The result is verified for precision through comparison with numerical simulation. The findings reveal that the permeability coefficient of rock and soil mass makes the most significant impact on the slurry diffusion radius， succeeded by the length of the grouting blocking section， slurry initial setting time， and drilling inclination in descending order of influence. With the 5% mass ratio of a "711" type slurry quick-setting agent， the maximum slurry diffusion radius can be reduced from 0.925m to 0.449m， a reduction of 0.476m， which is comparatively more recommended.

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3D forward modeling and response characteristics of low-resistivity overburden of the CFS-Pml absorbing boundary for ground-well transient electromagnetic method

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International Journal of mining Science and Technology 2023年第12期33卷 1541-1550页

作者： lijuan Zhao mingzhong Gao Nengzhong lei Hongfei Duan Weizhong Qiu Zhaoying Chen State Key laboratory of Intelligent construction and Healthy Operation and maintenance of Deep Underground Engineering College of Civil and Transportation EngineeringShenzhen UniversityShenzhen 518060China School of Civil Engineering and Architecture Wuyi UniversityWuyi 354300China Jinneng Holding Group Taiyuan 030000China China University of mining and Technology Xuzhou 221116China Shanxi Coal Geology 115 Exploration Institute Co. Ltd.Shanxi Geological Group Co.Ltd.Datong 037003China State Key laboratory of Coal and Coalbed methane Co-mining Jincheng 048012China

This study used the stable and convergent Dufort-Frankel method to differentially discretize the diffusion equation of the ground-well transient electromagnetic secondary *** absorption boundary condition of complex frequency-shifted perfectly matched layer(CFS-Pml)was used for truncation so that the low-frequency electromagnetic wave can be better absorbed at the model boundary.A typical three-dimensional(3D)homogeneous half-space model was established and a low-resistivity cube model was analyzed under the half-space *** response patterns and drivers of the low-resistivity cube model were discussed under the influence of a low-resistivity *** absorption boundary conditions of CFS-Pml significantly affected the low-frequency electromagnetic *** a low-resistivity cube around the borehole,its response curve exhibited a single-peak,and the extreme point of the curve corresponded to the center of the low-resistivity *** the low-resistivity cube was directly below the borehole,the response curve showed three extreme values(two high and one low),with the low corresponding to the center of the low-resistivity *** total field response of the low-resistivity overburden was stronger than that of the uniform half-space model due to the low-resistivity shielding effect of electromagnetic *** the receiving-transmitting distance gradually increased,the effect of the low-resistivity overburden was gradually weakened,and the response of the low-resistivity cube was *** was affected by the ratio of the overburden resistivity to the resistivity of the low-resistivity body.

关键词： Ground-well transient electromagnetic method CFS-Pml boundary condition 3D forward modeling low-resistivity overburden

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大跨度混凝土拱桥原型与模型时变行为对比

Journal of Central South University 2022年第5期29卷 1565-1577页

作者：王永宝秦鹏举刘志华张翛毛敏 College of Civil Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi Transportation Technology Research&Development Co.Ltd.Taiyuan 030027China Transportation Industry Key laboratory of Highway construction and maintenance Technology in loess Region Taiyuan 030027China

北盘江大桥为一座主跨为445 m,矢高为100 m的无铰拱桥,是中国已建的最大跨度劲性骨架混凝土拱桥。为研究该桥施工过程的合理性和成桥后的长期性能,开展了模型试验研究,但当考虑长期性能后,原型和模型桥测试的变形和应力比例不符合线弹... 详细信息

北盘江大桥为一座主跨为445 m,矢高为100 m的无铰拱桥,是中国已建的最大跨度劲性骨架混凝土拱桥。为研究该桥施工过程的合理性和成桥后的长期性能,开展了模型试验研究,但当考虑长期性能后,原型和模型桥测试的变形和应力比例不符合线弹性比例关系。因此,本文建立了原型桥与模型桥的三维有限元模型,用实测数据验证有限元模型的正确性;对比了原型桥与模型桥在弹性和考虑温度与收缩徐变耦合效应后的位移、应力结果,并对其长期变形行为进行参数分析。研究结果表明:当考虑有效温度和混凝土收缩徐变效应后,原型桥和模型桥的有限元分析结果与实测结果吻合较好;原型桥与模型桥在不同施工和成桥阶段的位移和应力相似比不再完全满足7.5和1.0的要求;混凝土收缩徐变预测模型和温度变化历程均会对原型桥与模型桥的位移比例产生较大影响。

关键词：混凝土拱桥时变行为有限元模型试验劲性骨架

Application of Submerged Ultrafiltration in Pretreatment of Flue Gas Desulfurization Wastewater

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Energy Engineering 2022年第6期119卷 2277-2296页

作者： Jiageng Zhang Zhengfeng Wang Jiguang Huang Chao Cheng Heng Zhang Dan Gao School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China Hebei construction&Investment Group Xuanhua Thermal Power Co. Ltd.Zhangjiakou075100China

Nowadays,the zero liquid discharge of flue gas desulfurization(FGD)wastewater from coal-fired units has attracted the attention of all countries in the *** pretreatment methods generally have the problems of high operation cost,small treatment capacity,and poor ***,the membrane method can avoid the above *** the current research,it has not been found that someone directly uses submerged ultrafiltration to pretreat FGD ***,this paper innovatively proposed to directly use ceramic ultrafiltration membrane to treat FGD wastewater,which can ensure effluent quality and improve the flexibility of the pretreatment *** this paper,the performance of submerged ultrafiltration membrane for the filtration of FGD wastewater from a power plant was studied to optimize the filtration performance and improve the effluent *** effects of operating parameters such as membrane permeate flux,aeration rate and filtration/backwashing time combination on the membrane performance were *** results showed that when the filtration/backwashing time combination was 15 min/30 s,with the increased in permeate flux from 55 l/(m2·h)to 100 l/(m2·h),the steady transmembrane pressure(TmP)increased from 39 kPa to 70 kPa,and the fouling rate increased significantly from 4.5 kPa/h to 7.3 kPa/h;When the aeration rate increased from 10 m3/(m2·h)to 30 m3/(m2·h),the membrane pollution was much *** aeration rate cannot further alleviate the membrane pollution,but also brought greater energy consumption;Increasing backwashing time can effectively inhibit the formation of gel layer on the surface of the membrane and prolong the initial stage of low-pressure operation;The rejection of suspended solids(SS)and turbidity of the equipment studied in this paper can reach more than 99%under various working conditions,which can satisfy the water quality requirements of the subsequent *** submerged ultrafiltration membrane was suitable

关键词： FGD wastewater pretreatment submerged ultrafiltration permeate flux aeration rate backwashing membrane fouling

Design and Pilot Programs of marine Exposure Station of A Sea-crossing Bridge

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武汉理工大学学报 2010年第17期32卷 131-136页

作者： QIN m Q WANG C J TU l Q ZHANG G Z SUN T X Wuhan Harbour Engineering Design and Research Co. ltd. Wuhan 430071China Key lab of large-span Bridge construction Technology Ministry of CommunicationsWuhan 430071China Zhejiang Province Zhoushan Island linking construction Commanding Department Zhoushan 316032China School of materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

This paper presents the location,the structural design as well as the anti-corrosion and the pilot programs of the marine exposure station of Zhoushan Archipelago seas sea-crossing bridges. Subjected to the marine environment,the concrete structures in serve with different mixing proportions,cover thickness,additional anti-corrosion measures such as rust-preventing agent,coating,penetration crystalline waterproof material,silicone and permeable fabric were studied. Those results obtained provide important information for the maintenance of marine concrete and the structural design of sea-crossing bridges in the above sea area.

关键词： exposure station sea-crossing bridge marine concrete durability design

Research on Service life Prediction model of Concrete Structure of Sea-crossing Bridge

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武汉理工大学学报 2010年第17期32卷 141-146页

作者： WANG C J ZHANG G Z lIU K X TU l Q lI J H QIN m Q Zhejiang Province Zhoushan Island linking construction Commanding Department Zhejiang 316032China Wuhan Harbor Engineering Design & Research Institute Co. ltd Wuhan 430071China Key lab of large-span Bridge construction Technology Ministry of CommunicationWuhan 430071China School of materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

According to the chloride corrosion environment,service life prediction model of concrete structure of sea-crossing bridge was built using modified Fick's second law and the whole probability calculation method,which was suitable for China. Furthermore,a visual service life prediction program of concrete structure was developed by optimized monte Carlo method. meanwhile,life 365 program was compared,indicating reliability of the prediction program. Finally,the validity of prediction model was verified in JinTang Bridge of Zhoushan Island mainland linkage Project.

关键词： sea-crossing bridge concrete structure service life prediction model verify

Impact of Untreated Sedimentation Tank Sludge Water Recycle on Water Quality During Treatment of low Turbidity Water

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Journal of Harbin Institute of Technology(New Series) 2015年第4期22卷 79-86页

作者： Ronggang Xu Yongpeng Xu Fuyi Cui li He Dong Wang Qingfeng Su School of municipal & Environmental Engineering Harbin Institute of Technology Ji'nan municipal Engineering Design & Research Institute(Group) Co. Ltd National Engineer Research Center of Urban Water Resources Southwest municipal Engineering Design & Research Institute of China China Urban construction Design & Research Institute Co. Ltd

The overall purpose of this research is to examine the impact of untreated sedimentation tank sludge water( USTSW) recycle on water quality during treatment of low turbidity water in coagulation—sedimentation processes. 950 m l of raw water and different concentrations of 50 m l USTSW are injected into six 1 000 m l beakers without *** results indicate that USTSW characterized as accumulated suspended solids and organic matter has active ingredients,which possess the equivalent function of coagulant. The optimal blended water turbidity is in the range of 10-20 NTU,within which USTSW recycle achieves the highest save coagulant rate. The mechanism of strengthening coagulation effect when USTSW recycle mainly depends on the chemical effect and physical effect. What is more,through scanning electron microscopy( SEm),it is found that the floc structures with USTSW recycle are more compact than those without USTSW recycle. Besides,the water quality parameters of color,NH3-N,CODmn,UV254,total aluminum,total manganese when USTSW recycle is better than the raw water without recycle,indicating that USTSW recycle can improve water quality with strengthening coagulation effect.

关键词： untreated sedimentation tank sludge water recycle low turbidity optimal blended water turbidity water quality

Hydrothermal Solidification of Diatomite and Its Heat Insulating Property

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沈阳建筑大学学报（自然科学版） 2012年第1期28卷 110-115页

作者： TONG Yu1,GAO Jian1,XIA Feng1,XU Dawei2,SONG lili3,YANG Wenrui1,ZENG You1(1.School of materials Science and Engineering,Shenyang Jianzhu University,Shenyang,China,110168 2.China construction Sixth Engineering Division Co.,ltd.,Tianjin,China,300451 3.Beijing Division,Jiangsu Zheng He Tat Hong Equipment Rental Co.,ltd.,Beijing,China,100102) School of materials Science and Engineering Shenyang Jianzhu University Shenyang 110168 China China construction Sixth Engineering Division Co. ltd. Tianjin 300451 China Beijing Division Jiangsu Zheng He Tat Hong Equipment Rental Co. Ltd. Beijing 100102 China

To meet the commercial requirements of inorganic heat insulators,the mixture of diatomite and Ca(OH)2 are evenly dispersed,mold-compacted,and then hydrothermally solidified due to the formation of tobermorite under an autoclaved *** investigations of the preparation conditions(including mix ratio,autoclaved factors,mold pressure,etc)were carried out to optimize the serving properties of such tobermorite-based *** a result,a compressive strength of more than 30 mPa was realized for the specimen in high density(about 1.30(g·cm-3)).On the contrary,the specimen in light weight for example 0.63(g·cm-3)typically showed a thermal conductivity of around 0.12(W·m-1·K-1).The present work developed a feasible way to produce and to control the serving properties of diatomite-based heat insulators by a process of hydrothermal solidification,in which the optimized value of Ca/Si ratio was proposed to be 0.6~0.7,while the water content is 25% in weight,and hydrothermal reaction is performed at 180 ℃ for no more than 24 hours.

关键词： diatomite tobermorite heat insulation hydrothermal solidification

独立小楼风满袖泰国Baan Pomphet酒店

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室内设计与装修 2020年第10期 54-59页

作者： [泰国]Onion Co.ltd.,m・l.Chittawadi Chitrabongs 舟舟(编译) Wison Tungthumya(摄影) Onion Co.ltd. M.L.Chittawadi Chitrabongs

泰国Baan Pomphet酒店坐落在庙宇密布的大城府沿岸上,毗邻古城区内一座比较重要的历史防御要塞Pom Phet堡垒,这里可以俯瞰整个湄南河(Chao Phraya River)和巴塞河(Pa Sak)的美丽风景。建筑的设计灵感来源于场地周边的环境:随波逐流的水... 详细信息

泰国Baan Pomphet酒店坐落在庙宇密布的大城府沿岸上,毗邻古城区内一座比较重要的历史防御要塞Pom Phet堡垒,这里可以俯瞰整个湄南河(Chao Phraya River)和巴塞河(Pa Sak)的美丽风景。建筑的设计灵感来源于场地周边的环境:随波逐流的水葫芦在夏季会铺满整个河面,两条河流交汇形成的漩涡成为场地内独一无二的动态景观。

关键词：湄南河水葫芦动态景观酒店设计灵感大城府泰国