Archives of Civil Engineering最新文献_第9页

Accident costs on the railway network in the Czech national conditions 事故成本在捷克铁路网上的国情

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2022.140187

Tomáš Funk, Vít Hromádka, Jana Korytárová, Eva Vítková

引用次数: 0

Evaluation of State of Fine Sands on the Basis of Shear Wave Velocity 基于横波速度的细砂状态评价

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2020.131801

Mirosław J. Lipiński, Małgorzata K. Wdowska

{"title":"Evaluation of State of Fine Sands on the Basis of Shear Wave Velocity","authors":"Mirosław J. Lipiński, Małgorzata K. Wdowska","doi":"10.24425/ace.2020.131801","DOIUrl":"https://doi.org/10.24425/ace.2020.131801","url":null,"abstract":"The paper presents an approach to identify the state of fine sands on the basis of shear wave velocity measurement. Large body of experimental data was used to derive formulae which relate void ratio with shear wave velocity and mean effective stress for a given material. Two fine sands which contained 8 and 14% of fines were tested. The soils were tested in triaxial tests. Sands specimens were reconstituted in triaxial cell. In order to obtain predetermined void ratio values covering possible widest range of the parameter representing a very loose and dense state as well, the moist tamping method with use of undercompaction technique was adopted. Fully saturated soil underwent staged consolidation at the end of which shear wave velocity was measured. Since volume control of a specimen was enhanced by use of proximity transducers, representative 3 elements sets (i.e. void ratio e, mean effective stress p’ and shear wave velocity VS) describing state of material were obtained. Analysis of the test results revealed that relationship between shear wave velocity and mean effective stress p' can be approximated by power function in distinguished void ratio ranges. This made possible to derive formula for calculating void ratio for a given state of stress on the basis of shear wave velocity measurement. The conclusion concerning sensitivity of this approach to the fines content was presented.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"16 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135584676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Use of Sand Columns in the Reinforcement of Weak Layers in Road Engineering 砂柱在道路工程软弱层加固中的应用

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2021.136487

Sami Mohammed Ayyad, Omar Asad Ahmad

{"title":"The Use of Sand Columns in the Reinforcement of Weak Layers in Road Engineering","authors":"Sami Mohammed Ayyad, Omar Asad Ahmad","doi":"10.24425/ace.2021.136487","DOIUrl":"https://doi.org/10.24425/ace.2021.136487","url":null,"abstract":"It is an established fact that when roads are planned and constructed, consideration needs to be given to ensuring the strength of the road surface. It is, however, also the case that when an existing road is being rebuilt or is under maintenance, its base may need to be fortified to increase the road’s vehicle-carrying capacity. The base may, for example, contain a high proportion of weak soil that would be difficult, time-consuming, and costly to remove. This paper aims to investigate the efficacy of using sand-filled piles to reduce road deformation. Experiments conducted on sponge samples confirm that there is a relationship between the total area of sand-filled piles and relative reduction in deformation. It finds that the relationship is non-linear, but that the relationship can be made linear by adjusting the area of sand-filled piles. When the area of sand-filled piles increases from 7.8% to 19.4%, the deformation module can change by up to 100%. Relative reduction in deformation can change from 14% to 45.5% when the area of sand-filled piles increases from 7.8% to 11.7%. The maximum reduction in deformation – 92.4% occurs when the area of sand-filled piles exceeds 19.5%. Changing the loads borne also affects the deformation module. This paper found that when there was a 10 to 15kg load, and the number of sandfilled piles was increased, there was a change in the deformation module by 380-470%. When there was only a 5kg load on the sample, and the number of sand-filled piles was increased, there was a change in the deformation module by up to 1217%.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"13 19","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135584714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Stochastic number of concrete families and the likelihood of such a value 具体族的随机数目和这种值的似然

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2022.140154

{"title":"Stochastic number of concrete families and the likelihood of such a value","authors":"","doi":"10.24425/ace.2022.140154","DOIUrl":"https://doi.org/10.24425/ace.2022.140154","url":null,"abstract":": Modern construction standards, both from the ACI, EN, ISO, as well as EC group, introduced numerous statistical procedures for the interpretation of concrete compressive strength results obtained on an ongoing basis (in the course of structure implementation), the values of which are subject to various impacts, e.g., arising from climatic conditions, manufacturing variability and component property variability, which are also described by speciﬁc random variables. Such an approach is a consequence of introducing the method of limit states in the calculations of building structures, which takes into account a set of various factors inﬂuencing structural safety. The term “concrete family” was also introduced, however, the principle of distributing the result or, even more so, the statistically signiﬁcant size of results within a family was not speciﬁed. Deﬁciencies in the procedures were partially supplemented by the authors of the article, who published papers in the ﬁeld of distributing results of strength test time series using the Pearson, 𝑡 -Student, and Mann–Whitney U tests. However, the publications of the authors deﬁne neither the size of obtained subset and their distribution nor the probability of their occurrence. This study ﬁlls this gap by showing the size of a statistically determined concrete family, with a deﬁned distribution of the probability of its isolation.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"12 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135634471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proposal for application of risk analysis to assess robustness of floor slabs pre-stressed with unbonded tendoms 应用风险分析评估无粘结预应力楼板稳健性的建议

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2022.140166

引用次数: 1

Estimate final cost of roads using support vector machine 使用支持向量机估计道路的最终成本

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2022.143061

引用次数: 0

Marshall stability of porous asphalt mixture incorporating kenaf fiber 含红麻纤维多孔沥青混合料的马歇尔稳定性

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2022.140174

{"title":"Marshall stability of porous asphalt mixture incorporating kenaf fiber","authors":"","doi":"10.24425/ace.2022.140174","DOIUrl":"https://doi.org/10.24425/ace.2022.140174","url":null,"abstract":": Porous asphalt mixture (PA), known as open-graded surfaces over a stone bed underneath, allows water to go through. These factors can aﬀect the porous asphalt mixture adhesive strength. The high amount of course aggregate promotes the structure of air voids have certain impacts on the acoustic properties of porous asphalt. The materials properties are consisting of both aggregate and bitumen tests. This study also details out the aggregates sieve analysis test to develop new aggregate gradation for PA. According to ﬁve ASEAN countries’ speciﬁcations, the sieve analysis test was done. The countries included are Malaysia, Vietnam, Thailand, Singapore, and Indonesia. The test for the binder includes the softening point, penetration, and ductility. This study also investigates the addition of kenaf ﬁber in the mixture as an additive. Mechanical performance test for PA using Marshall Stability test to identify the strength and the properties of the conventional PA with the addition of kenaf ﬁber compared to the new gradation of PA incorporating kenaf ﬁber. From the results, the addition of 0.3% kenaf modiﬁed PA improved the performance of PA in terms of Marshall Stability and volumetric properties.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"2017 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135635743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

BIM in the construction process – selected problems at the stage of implementation in Polish road engineering BIM在施工过程中的应用——波兰道路工程实施阶段的选择问题

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2022.140190

{"title":"BIM in the construction process – selected problems at the stage of implementation in Polish road engineering","authors":"","doi":"10.24425/ace.2022.140190","DOIUrl":"https://doi.org/10.24425/ace.2022.140190","url":null,"abstract":": The digitalisation of the construction process is a phenomenon that has been signiﬁcantly accelerated in recent years. BIM (Building Information Modeling) technology is becoming increasingly popular with designers, contractors and investors and is being used, mainly in relation to buildings. In communication objects, the application of BIM is much more diﬃcult, as conﬁrmed by the shifting schedules during implementation trials in road design. And yet, BIM is not only about the design or execution of construction works, it is worth taking advantage of the new possibilities especially at the stage of using the facility. BIM in transportation infrastructure is already used in other countries, mainly in Scandinavia, where work on its implementation began at the beginning of this century. The preparation of appropriate procedures and standards, adjusted to national realities, requires gathering experience on pilot investments. The paper presents an analysis of the necessary initial data which will make it possible to apply BIM in the Polish road construction industry. Moreover, the main risks occurring at various stages of the construction process are presented. The aim of the article is to indicate the necessary actions that will allow the advantages of BIM technology to be used more fully in road investments. The implementation of BIM in Polish road construction is not a distant future but rather \"tomorrow\", so it is worth knowing the limitations and preparing for the upcoming changes.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"1990 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Analysis of direct rework costs in Ukrainian construction 乌克兰建筑直接返工成本分析

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2021.137175

引用次数: 7

Searching for Optimal Pre-Stressing of Steel Bar Structures Based on Sensitivity Analysis 基于灵敏度分析的钢筋结构预应力优化研究

Archives of Civil Engineering Pub Date : 2023-11-06 DOI: 10.24425/ace.2020.134411

引用次数: 5