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Soil erosion and its causes in high-filling body:A case study of a valley area on the Loess Plateau,China 被引量:2
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作者 BAO Han TANG Ming +3 位作者 LAN Heng-xing PENG Jian-bing ZHENG Han GUO Guan-miao 《Journal of Mountain Science》 SCIE CSCD 2023年第1期182-196,共15页
Large-scale land consolidation projects(LCPs)have been carried out on the Loess Plateau to increase the area of agriculture land.The newly created land is prone to soil erosion under the effects of water and gravity.T... Large-scale land consolidation projects(LCPs)have been carried out on the Loess Plateau to increase the area of agriculture land.The newly created land is prone to soil erosion under the effects of water and gravity.Taking a typical high-filling body(HFB)formed by LCPs in Yan’an,China as the subject,this study comprehensively investigated the types and causes of soil erosion with multiple methods of field investigation,on-site monitoring and laboratory tests.Results showed that the HFB presented a composite pattern of soil erosion with multiple types mainly including underground erosion,mixed water-gravity erosion,seepage erosion,and scouring erosion.The type of erosion varied spatially in different parts of the HFB depending on the dominant factors,mainly including the groundwater state,rainfall,runoff,gravity action,topography,and soil erodibility.The underground erosion mainly occurred at the positions with higher groundwater level and larger hydraulic gradient,while scouring erosion mainly occurred at the positions with extensive interactions of surface runoff,channel slope gradient and soil properties.And near the leading edge of the top of the slope,a band of mixed watergravity erosion occurred owing to the effects of water and gravity.In addition,nearly saturated soils at the toe of HFB displayed groundwater exfiltration and slope-face slumping.Based on our findings on the causes and variation of soil erosion for the HFB,we proposed the following erosion prevention and control measures to protect the LCPs on the Loess Plateau:to construct drainage ditches and blind ditches to form a complete drainage system,plant alfalfa on the top platform to increase rainfall interception and reduce surface runoff,set seepage ditches and plant deep-rooted plants at the toe of the slope to improve slope toe stability,monitor groundwater level and slope deformation to learn the erosion dynamics and slope stability,and optimize the geometry of HFB such as the slope gradient and slope steps to reduce soil erosion. 展开更多
关键词 Land consolidation high-filling body Soil erosion Loess Plateau On-site monitoring Influence factors
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Wireless remote spatiotemporal monitoring of high-fill foundation deformation
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作者 YANG Xiao-hui LI Zhi-qian +1 位作者 ZHU Yan-peng GUO Nan 《Journal of Mountain Science》 SCIE CSCD 2023年第6期1620-1638,共19页
The spatial and temporal deformation patterns and deformation control indicators of highfill foundations directly affect the design,construction and operational safety of high-fill projects.In situ monitoring can comp... The spatial and temporal deformation patterns and deformation control indicators of highfill foundations directly affect the design,construction and operational safety of high-fill projects.In situ monitoring can comprehensively reflect the deformation of high-fill during and after construction.In this paper,we have first designed and installed an integrated wireless remote monitoring system for high-fill to achieve real-time dynamic monitoring of settlement,pore water pressure and soil pressure of the fill foundation.Based on the monitoring results of nearly one year of the construction period and two years after construction,it was found that the deformation amount and deformation rate of the high-fill foundation showed a non-linear growth relationship with the filling rate and filling height.The settlement deformation of the high-fill foundation during the loading period was mainly dominated by the original foundation soil,accounting for 54.4%of the total settlement on average;the settlement deformation during the post-construction period was mainly dominated by the filling body,accounting for 77.04%of the total settlement on average,and the settlement deformation during the post-construction period mainly occurred in the first year after construction.The analysis of the deformation mechanism suggests that the deformation of the filling body is dominated by exhaust consolidation during the loading period and drainage consolidation during the post-construction period;the deformation of the original foundation soil is dominated by drainage consolidation during the loading period and drainage consolidation develops slowly during the post-construction period.It is recommended that the original foundation should be reinforced before the large area filling construction,and that the filling rate should be strictly controlled during construction.The research results can provide a scientific basis for deformation calculation and stability assessment of high-fill foundations. 展开更多
关键词 high-fill engineering Wireless remote monitoring Foundation deformation Spatiotemporal law Settlement after construction
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Numerical study on settlement of high-fill airports in collapsible loess geomaterials:A case study of Lüliang Airport in Shanxi Province,China 被引量:9
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作者 JIE Yu-xin WEI Ying-jie +1 位作者 WANG Du-li WEI Yi-feng 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第3期939-953,共15页
Foundation settlement is of great significance for high-fill engineering in collapsible loess areas.To predict the construction settlement of Lüliang Airport located in Shanxi Province,China,a plane strain finite... Foundation settlement is of great significance for high-fill engineering in collapsible loess areas.To predict the construction settlement of Lüliang Airport located in Shanxi Province,China,a plane strain finite element method considering the linear variation in the modulus,was carried out in this paper based on the results of geotechnical tests.The stress and deformation of four typical sections caused by layered fill are simulated,and then the settlement of the high-fill airport is calculated and analyzed by inputting three sets of parameters.The relative soft parameters of loess geomaterials produce more settlement than the relatively hard parameters.The thicker the filling body is,the greater the settlement is.The filling body constrained by mountains on both sides produces less settlement than the filling body constrained by a mountain on only one side even the filling thickness is almost the same.The settlement caused by the original subbase accounts for 56%−77%of the total settlement,while the fill soils themselves accounts for 23%−44%of the total settlement,which is approximately consistent with the field monitoring results.It provides a good reference for predicting the settlement of similar high-fill engineering. 展开更多
关键词 high-fill airport collapsible loess settlement deformation numerical calculation
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On the Ecological Restoration Mode of Urban Water Revetment Landscape 被引量:1
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作者 Yicheng WANG Hui LIN 《Asian Agricultural Research》 2014年第10期68-72,76,共6页
Urban waterfront revetment is a special zone between water and land,with high ecological,economic and aesthetic value. Waterfront revetment landscape is not only an important part of urban water and land ecosystems,bu... Urban waterfront revetment is a special zone between water and land,with high ecological,economic and aesthetic value. Waterfront revetment landscape is not only an important part of urban water and land ecosystems,but also an integral part of the city. Based on the current situation of ecological environment of waterfront revetment landscape,we come up with different ecological restoration modes for different types of revetment,to achieve the organic integration of waterfront revetment landscape and ecology. 展开更多
关键词 WATER revetment LANDSCAPE ECOLOGICAL RESTORATION E
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Types of Ecological Revetments in Hydraulic Engineering 被引量:1
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作者 RONG Yunjie LIU Jingqiang LIU Qianyu 《Journal of Landscape Research》 2018年第2期1-4,共4页
Compared with traditional bank protection, ecological revetments, as a new type of bank protection, can ensure the sustainable and healthy development of river ecology and has broad application prospects. In this pape... Compared with traditional bank protection, ecological revetments, as a new type of bank protection, can ensure the sustainable and healthy development of river ecology and has broad application prospects. In this paper, the design principles for ecological revetments and the factors that need to be considered in the selection of revetment plants were summarized; and the types of ecological revetments commonly used in water conservancy projects were summarized and classified according to the proportion of natural materials in revetment materials through domestic and foreign research and engineering examples, and their applicable scope and relevant merits were introduced. In conclusion, ecological revetments should get rid of its own limitations in the practical application process, and the river regulation scheme and revetment type should be selected comprehensively and flexibly combined with the status quo. 展开更多
关键词 Ecological revetments Design principles revetment types Engineering measures
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Field Application of Mulberry Straw Arch in Ecological Bank Revetment 被引量:1
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作者 Xiaojuan Yu Chao Liu +2 位作者 Quan Hua Xiaohui Wang Yongbin Li 《Journal of Renewable Materials》 SCIE EI 2022年第10期2607-2621,共15页
With the growing level of awareness and increasing demand for environmental protection,timber pile revetments with significant ecological effects have experienced increasingly wide application in China.The current tim... With the growing level of awareness and increasing demand for environmental protection,timber pile revetments with significant ecological effects have experienced increasingly wide application in China.The current timber pile revetment system has two problems:continuous dense piles have high construction costs and require large timber consumptions,while the discrete pile-bamboo fence systems have poor retaining effects.Considering these problems,an original revetment structure form is proposed:a discrete pile-mulberry straw arch structure.To investigate the mechanical properties of the mulberry straw,some mechanical tests are conducted on mulberry straw and its arch structure.It is found that the average compressive strength of mulberry straw is 2.30 MPa,the bending strength is 20.08 MPa and the shear strength is 2.99 MPa;considering the structural characteristics of arches,mulberry straw arches have a high bending strength,which affords immense potential for their application in revetment structures.Furthermore,by doing field study of the discrete timber pile-mulberry straw arch structure for bank revetment,it is found that the arch height of the mulberry straw arch changes 1.4–1.6 cm after 489 d observation.The soil settlement before the straw arch is 0.13–0.18 cm and the settlement of the pile is 0.66–0.72 mm.Compared with bamboo fence structure,the cost of using mulberry straw arch structure as revetment material can save up to 27.07%.Therefore,the discrete timber pile-mulberry straw arch has a rational and stable structure that provides effective support for protecting the riverbank and the toe of gentle slopes and effectively prevents the collapse of bank slopes in the rear.The new revetment structure proposed in this paper has signifi-cant ecological and economic effects,is easy to construct and feasible for standard production,and consequently has great application potential. 展开更多
关键词 Mulberry straw arch ecological bank revetment field test
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Study on the Impact of Filter Layer Permeability on Revetment Top Layer Stability under Wave Action 被引量:1
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作者 Liehong Ju Junning Pan Chengrui Liu 《Journal of Shipping and Ocean Engineering》 2015年第6期327-333,共7页
In the design of revetment engineering under wave action, to resist the wave action, the pattern of top layer-filter layer-core (subsoil) is often adopted. In general, the structure of top layer is usually single di... In the design of revetment engineering under wave action, to resist the wave action, the pattern of top layer-filter layer-core (subsoil) is often adopted. In general, the structure of top layer is usually single discrete blocks, typically accropode blocks, four-leg square hollow blocks and barrier boards, and also acropode, riprap, paved rock blocks or concrete slabs with smaller waves. Such top layer has been provided with many research findings on its stability and is widely used in engineering. Setting a filter layer between the top layer and the lower dike core mainly has two functions: (1) giving certain permeability, to minimize the hydrodynamic load directly acting on the lower foundation soil; (2) giving certain hydraulic tightness, to prevent fine sediment of the lower foundation soil from being washed out. This paper is focused on a special filter layer with geotextile as its upper structure and coarse aggregate as its lower structure. By simulating geotextile with different permeability and coarse aggregate with different size, the pressure of top of cover layer and the down side of the geotextile is tested under wave actions, and compared with theoretical analysis, in this way, how the permeability of geotextile impacts the stability of top layer is studied. The research shows that when the filter layer under the geotextile has high permeability and the geotextile's permeability gets poorer, the uplift force to geotextile and the top layer will be increased under wave action, which will cause damage to the top layer when it is greater than the vertical component of the underwater gravity along the slope surface. 展开更多
关键词 revetment WAVE filter layer GEOTEXTILE PERMEABILITY uplift force.
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Mechanism and calculation method of rheological settlement of high-filled embankment
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作者 王智超 罗迎社 唐松花 《Journal of Central South University》 SCIE EI CAS 2008年第S1期381-385,共5页
The characteristics of high-filled embankment rheological settlement were analyzed;mechanical calculation model of high-filled embankment rheological settlement during constructing and running period was also put forw... The characteristics of high-filled embankment rheological settlement were analyzed;mechanical calculation model of high-filled embankment rheological settlement during constructing and running period was also put forward.Combining the macroscopic and microscopic deformation properties of the engineering soil grain,its constitutive model was set up and its characters were fully revealed,at the same time,its practical calculation formula under the action of dead-weight load was derived,which is feasible by analysis and comparison. 展开更多
关键词 high-filled EMBANKMENT RHEOLOGICAL SETTLEMENT CALCULATION method
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Waterfront Revetment in Yaodu Town, Qingbaijiang District, Chengdu
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作者 GAN Yuliang 《Journal of Landscape Research》 2017年第4期49-52,共4页
With the advancement of urban-rural integration, township waterfront functioning as urban waterfront is increasingly emphasized by people. Township waterfront is expected to not only meet the basic needs of urban wate... With the advancement of urban-rural integration, township waterfront functioning as urban waterfront is increasingly emphasized by people. Township waterfront is expected to not only meet the basic needs of urban waterfront in landscape, but also give consideration to both leisure tourism and ecological protection. This paper analyzes the existing problems in the revetment design on the township waterfront and elaborates the importance and feasibility of constructing the ecological revetment in the traditional townships as well as design procedures. The concept of ecological design is introduced into the revetment design on the township waterfront to meet the requirements of both man and nature, so as to achieve a harmonious coexistence between man and nature and sustainable development in a real sense. 展开更多
关键词 Waterfront landscape Township waterfront revetment design Ecological protection
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Effect of Waterscape Structures on Nitrogen and Phosphorus Removal Efficiency in Revetment Wetland System
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作者 WANG Yunzhong YANG Sichao +1 位作者 YANG Chengjian WANG Tianyu 《Journal of Landscape Research》 2017年第6期61-64,共4页
The effect of aeration and waterscape structures reaeration system on nitrogen and phosphorus removal efficiency in revetment wetlands was studied by laboratory simulation. The results showed that the removal efficien... The effect of aeration and waterscape structures reaeration system on nitrogen and phosphorus removal efficiency in revetment wetlands was studied by laboratory simulation. The results showed that the removal efficiency of TN, TP in tranquil flow waterscape was 61% and 72%; aeration and waterscape structure system promoted nitrogen and phosphorus removal efficiency in revetment wetland through increasing the DO content in the water, compared with system without artificial oxygen, the removal efficiency of TP in waterscape structures increased by 11. 6%-19. 1%, and that of TN increased by 10.5%-16. 1%; meanwhile, disturbance brought by the waterscape structure systems enhanced the adsorption of TP and flocculation effect; in addition, nitrification was confirmed as the main control step of TN removal in revetment wetland system. 展开更多
关键词 Waterscape structures revetment wetland Nitrogen and phosphorus Dissolved oxygen(DO)
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Energy Dissipation Within the Wave Run-Up at Stepped Revetments
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作者 KERPEN Nils B BUNG Daniel B +1 位作者 VALERO Darnel SCHLURMANN Torsten 《Journal of Ocean University of China》 SCIE CAS CSCD 2017年第4期649-654,共6页
To understand the processes and energy dissipation performance caused by turbulence during the wave run-up over a stepped revetment,hydraulic model tests with steady flow conditions are conducted and correlated with u... To understand the processes and energy dissipation performance caused by turbulence during the wave run-up over a stepped revetment,hydraulic model tests with steady flow conditions are conducted and correlated with unsteady flow conditions of the wave run-up within a short time frame.Under irregular waves,the run-up reduction over a stepped revetment is dependent on the Iribarren number and decreases for decreasing Iribarren numbers.Velocity gradients are found to be similar in a steady and unsteady flow regime near the pseudo-bottom. 展开更多
关键词 RUN-UP stepped revetment roughness: energy dissipation
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基于Stacking集成算法的抛石护岸水毁破坏预测研究
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作者 王浩 晏田田 +3 位作者 郭剑波 张金涛 马利群 安杰 《水电能源科学》 北大核心 2024年第1期185-188,共4页
抛石护岸在顶冲等极端情况下易发生水毁破坏,给人民的生命财产带来威胁。通过水槽试验获取496组样本数据,利用互信息(MI)筛选出6个关键特征属性,并采用支持向量机(SVR)、广义回归神经网络(GRNN)和随机森林(RF)等机器学习算法构建多个预... 抛石护岸在顶冲等极端情况下易发生水毁破坏,给人民的生命财产带来威胁。通过水槽试验获取496组样本数据,利用互信息(MI)筛选出6个关键特征属性,并采用支持向量机(SVR)、广义回归神经网络(GRNN)和随机森林(RF)等机器学习算法构建多个预测模型。然后,将这些模型作为基学习器,结合BP神经网络(BPNN)作为元学习器,采用Stacking集成学习方法构建抛石护岸破坏程度预测模型。最后,通过决定系数(R^(2))、均方根误差(R_(RMSE))及平均绝对误差(M_(MAE))等评价指标对模型性能进行评估。结果表明,Stacking模型在抛石护岸破坏高度、长度、范围上的平均R^(2)为0.98、RRMSE为0.02、M_(MAE)为0.03,相较于单一模型(SVR、GRNN、RF),Stacking模型的R_(RMSE)、M_(MAE)皆为最小,R2最高。在抛石护岸水毁破坏程度的预测中,融合的Stacking模型展现出更高的准确性与稳定性。 展开更多
关键词 抛石护岸 水毁破坏 Stacking集成算法 预测研究
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淤泥固化土动力特性及在直立护岸抗震分析中的应用
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作者 赵杰 向田一 王浩 《地震工程学报》 CSCD 北大核心 2024年第5期1032-1042,共11页
以大连临空产业园填海造地项目为背景,开展淤泥固化土动力特性试验研究。运用FLAC^(3D)有限元软件对不同地基处理方案的直立沉箱护岸在地震作用下进行动力响应模拟。从加速度响应、孔压与有效应力、残余变形等方面定量评价直立沉箱护岸... 以大连临空产业园填海造地项目为背景,开展淤泥固化土动力特性试验研究。运用FLAC^(3D)有限元软件对不同地基处理方案的直立沉箱护岸在地震作用下进行动力响应模拟。从加速度响应、孔压与有效应力、残余变形等方面定量评价直立沉箱护岸结构的抗震安全性。动力特性试验结果表明:阻尼比与剪切应变和固化剂掺量呈正相关,且围压越高,阻尼越小。数值分析结果表明:在地震作用下,不同的地基条件下加速度放大系数呈现出不同的峰值;沉箱下方砂土层不液化;淤泥固化土地基上沉箱的残余变形小于原状淤泥地基且高水位能减小残余变形,提高沉箱的安全性。研究成果可为类似港口工程抗震设计提供参考。 展开更多
关键词 沉箱护岸 淤泥固化土 动力特性 抗震安全性 残余变形
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滨水生态驳岸对水体的净化效果研究——以南昌市象湖湿地公园为例
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作者 魏绪英 陈美玲 蔡军火 《南方林业科学》 2024年第2期37-41,78,共6页
为研究滨水生态驳岸对水体的净化效果,本文以南昌市象湖湿地公园生态驳岸为例,通过重新构建生态驳岸植物群落等工程改造,监测和评价生态驳岸工程改造前后示范段的近岸水体净化效果。结果表明,改造前,区域内各水体的污染程度均较严重,原... 为研究滨水生态驳岸对水体的净化效果,本文以南昌市象湖湿地公园生态驳岸为例,通过重新构建生态驳岸植物群落等工程改造,监测和评价生态驳岸工程改造前后示范段的近岸水体净化效果。结果表明,改造前,区域内各水体的污染程度均较严重,原硬质驳岸、自然缓坡和木桩驳岸的近岸水质均为地表水Ⅴ类或Ⅴ类以下,以总氮为主要污染物,而总磷的污染程度较小。改造完成后,区域内的主要水体水质上升为地表水Ⅲ类,透明度明显增大;仅有局部的微小区域水质仍为Ⅴ类,但其污染指数已有明显降低。因此,生态驳岸的营建和滨水地带植物群落的合理布局,结合污染控制,能够较好地保护和重建水陆边缘地带的自然生态过程及岸栖生物栖息环境,有效地发挥其生态系统边缘效应,形成自然优美、生态功能持续稳定的湖泊湿地景观。 展开更多
关键词 南昌市 象湖湿地公园 生态驳岸 景观营建 水质改善
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水位变化条件下植被对下荆江河段岸坡稳定性影响分析
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作者 邱嘉琦 余明辉 李倩 《水利学报》 EI CSCD 北大核心 2024年第1期60-70,共11页
针对下荆江河段典型的上黏下砂二元岸坡,选用香根草-高羊茅组合植物护坡型式,综合考虑植物根系锚固作用及植被蒸腾作用,利用GeoStudio软件模拟岸坡强度指标和热力学指标,运用单因子分析方法研究河道水位下降幅度M、水位下降速率R、初始... 针对下荆江河段典型的上黏下砂二元岸坡,选用香根草-高羊茅组合植物护坡型式,综合考虑植物根系锚固作用及植被蒸腾作用,利用GeoStudio软件模拟岸坡强度指标和热力学指标,运用单因子分析方法研究河道水位下降幅度M、水位下降速率R、初始水位I因素对岸坡稳定性的影响,并运用灰色关联分析方法对比三种因素对岸坡稳定性的影响程度。结果表明:在水位下降过程中,岸坡稳定安全系数先快速下降,后趋于稳定;岸坡稳定性受水位快速下降的影响最大,当下降速率小于1 m/d时,素土岸坡能保持在基本稳定状态;当下降速率大于3 m/d时,岸坡失稳破坏。植被有助于提升岸坡的稳定性,有植被岸坡与素土岸坡相比,其稳定安全系数最大可提升4.33%;岸坡稳定安全系数与M、R、I三种影响因素的关联度在有植被条件下依次有所下降,最大降低3.73%。本文研究结果明确了水位变化条件下植被对下荆江岸坡的稳固效果,可为生态护岸工程的设计提供基础支撑。 展开更多
关键词 生态护岸 下荆江河段 河岸稳定性 水位下降
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软体排沉排水流结构与排体动力特性数值模拟
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作者 杨涵苑 陆永军 +1 位作者 左利钦 陆彦 《哈尔滨工程大学学报》 EI CAS CSCD 北大核心 2024年第5期1013-1023,共11页
针对软体排沉排施工时容易出现撕排和断排的问题,本文基于k-ωSST湍流模型,采用分区耦合算法对顺水沉排过程进行双向流固耦合模拟。分析了不同水流条件下绕流流场、涡流结构与排体动力特性,并结合室内水槽试验验证模型计算精度。结果表... 针对软体排沉排施工时容易出现撕排和断排的问题,本文基于k-ωSST湍流模型,采用分区耦合算法对顺水沉排过程进行双向流固耦合模拟。分析了不同水流条件下绕流流场、涡流结构与排体动力特性,并结合室内水槽试验验证模型计算精度。结果表明:水流流经排体后发生流动分离,导致沿排宽中轴线形成对称的回流区。排体迎水面流速随水深增加呈指数型递增,排体后方高速尾流带的最大流速相较平均流速可增大40%~50%。当雷诺数增加,主体涡流结构由靠近床面侧逐步向水面处发展。此外,排体所受应力沿横向呈条带状分布,峰值集中于排体与翻板交界处及排头梁附近。研究结果可为完善排体结构设计、改进沉排施工工艺提供理论指导。 展开更多
关键词 航道整治 软体排 护岸工程 流固耦合 沉排 动力响应 流场特性 涡流结构
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钢板桩加固岸坡变形与桩土相互作用机理研究
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作者 张健 杨立功 +3 位作者 张宇亭 赵跃 刘勇军 吴文华 《岩土工程学报》 EI CAS CSCD 北大核心 2024年第S01期202-206,共5页
针对航道开挖过程中护岸边坡板桩变形及桩土相互作用机制,通过选取典型断面进行现场试验的方法,对板桩结构位移、土压力及临近土体变形等关键物理量参数进行监测,并结合理论计算方法对板桩结构及后方岸坡土体稳定性进行了详细分析,探究... 针对航道开挖过程中护岸边坡板桩变形及桩土相互作用机制,通过选取典型断面进行现场试验的方法,对板桩结构位移、土压力及临近土体变形等关键物理量参数进行监测,并结合理论计算方法对板桩结构及后方岸坡土体稳定性进行了详细分析,探究了复杂地质条件下桩后土体变形与主动土压力的内在关联,得到了部分有益结论。板桩护岸后方边坡土体水平位移随开挖进行逐渐增加,边坡达到平衡状态时不同深度土体位移约为0.8~1 mm,板桩桩顶水平位移变化量约为1.2 mm。航道开挖过程中板桩主动侧土压力随开挖的进行逐渐减小,不同埋深位置桩侧土压力减小值约为1 kPa,与理论计算结果比较发现现场试验结果均较小,说明上述理论计算方法对于本试验结构形式而言土压力计算略偏保守。 展开更多
关键词 钢板桩 岸坡加固 现场试验 土体位移 桩土相互作用
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生态型护岸在水利工程设计中的应用 被引量:2
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作者 孔维祥 《工程建设与设计》 2024年第5期136-138,共3页
分析生态型护岸特征及生态型护岸在水利工程设计中的应用要点,以某河流综合整治(防洪工程)为研究对象,从洪水计算及防洪对策分析、水土流失防治措施总体布局、社会经济效益综合评价几方面详细阐述生态型护岸在水利工程设计中的应用。
关键词 生态型护岸 水利工程 工程设计
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内河航道板桩-浆砌块石结构共同护岸机理研究
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作者 杨立功 张宇亭 +2 位作者 李建东 赵跃 吴文华 《岩土工程学报》 EI CAS CSCD 北大核心 2024年第S01期222-227,共6页
在内河高等级航道建设中,新建板桩-原有浆砌块石共同护岸成为一种新型的护岸结构。通过对该护岸结构的离心模型试验研究,分析了板桩与原有结构之间无连接(J1)、刚性连接(J2)时,原有护岸结构位移、板桩桩侧土压力及桩身弯矩。试验结果表... 在内河高等级航道建设中,新建板桩-原有浆砌块石共同护岸成为一种新型的护岸结构。通过对该护岸结构的离心模型试验研究,分析了板桩与原有结构之间无连接(J1)、刚性连接(J2)时,原有护岸结构位移、板桩桩侧土压力及桩身弯矩。试验结果表明,刚性连接时,原有结构后倾、下沉位移远小于无连接情况,板桩稳定性大幅度提升;开挖过程中J1,J2条件下板桩除了产生平移位移、还有转动位移,J1以转动为主,J2以平移为主;受U型板桩形状影响,开挖过程中板桩两侧土体形成土拱,同一深度不同位置板桩土压力有较大区别,土压力变化也有较大差异;开挖过程中,J2条件下桩身范围内土压力变化较一致,J1条件下随桩身深度增加,桩侧土压力变化幅度增加;J1条件下最大弯矩位于桩身下部、J2条件下位于桩身上部,且J2最大弯矩大于J1最大弯矩。 展开更多
关键词 板桩 浆砌块石 护岸 土压力 土拱效应 离心模型试验
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一种新型双曲弧面海堤护坡结构的防浪消能效果 被引量:1
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作者 周晔凯 秦鹏 +4 位作者 李杰成 匡义 田蕾 吴仕琪 徐欣悦 《长江科学院院报》 CSCD 北大核心 2024年第4期89-94,共6页
研发新型海堤护坡结构对守护人民生命安全、提高海堤工程稳定性具有重要意义。针对钱塘江河口潮流强劲,而传统海堤护面光滑,难以对强大冲击浪进行有效缓冲的工程问题,设计研发了一种具有双曲弧面结构的海堤护坡结构,采用室内水力试验和... 研发新型海堤护坡结构对守护人民生命安全、提高海堤工程稳定性具有重要意义。针对钱塘江河口潮流强劲,而传统海堤护面光滑,难以对强大冲击浪进行有效缓冲的工程问题,设计研发了一种具有双曲弧面结构的海堤护坡结构,采用室内水力试验和数值模拟等手段对其防浪效果、压强分布特征进行分析。研究结果表明,新型海堤护面结构通过有效引导、改变冲击浪的流向及流态,既能起到较好的消能作用,又能增强钱塘江大潮的观景效果,为复杂水流条件下海堤护坡结构设计提供了新的工程思路。 展开更多
关键词 双曲弧面 海堤护坡 室内水力试验 数值模拟 消能防浪
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