Archives of Civil Engineering最新文献_第2页

Development and consideration of Chinese super-large diameter shield tunnel 中国超大直径盾构隧道的开发与研究

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Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148923

Wei Qiu, Xin Dong, Linjian Su, X. Xue, Kexin Zhang

引用次数: 0

Research on project cost control of construction engineering contracting enterprises based on owner satisfaction in China 基于业主满意度的中国建筑工程承包企业项目成本控制研究

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Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148933

Xiaofu Zhang

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The durability of inverted roof insulation kits 倒置式屋顶隔热套件的耐用性

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Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148910

B. Francke, A. Winkler-Skalna, R. Geryło

{"title":"The durability of inverted roof insulation kits","authors":"B. Francke, A. Winkler-Skalna, R. Geryło","doi":"10.24425/ace.2024.148910","DOIUrl":"https://doi.org/10.24425/ace.2024.148910","url":null,"abstract":"The paper analyses the loss mechanism of roof insulation kits’ performance due to dampness increase in the insulation layers. The analyzed structures were used in standard conditions for ten years and had thermal insulation made of expanded polystyrene with a hydrophobized surface. The dampness of the thermal insulation materials was determined after the referenced period for their future fitness as roof insulation, based on laboratory tests of material samples collected from the structures. They were completed with a computer simulation of heat transfer and dampness in the partition for working conditions specified for ten years, assuming the thermal conductivity was determined for the materials collected from the analyzed roofs. It was discovered that simulation-based calculation dampness values are much lower than those observed after ten years of roof utilization. Additionally, the authors attempted to determine the correlations between the period of thermal insulation materials used in real conditions and the selected properties of the products determined in laboratory tests. To that end, the collected material was dried to constant weight and then subjected to accelerated aging through total immersion in water at room temperature, for twenty-eight days, followed by 300 freeze-thaw cycles at –20°C and +20°C. The results helped conclude that the abovementioned laboratory testing cycle does not allow for assessing the fitness for the use of the referenced products for ten years. The directions of future laboratory tests were set, suggesting extending the testing cycle at least twice.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367806","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

Stability analysis of heavy machinery moving on weak subsoil. 3D FEM model vs. analytical models 在软弱基土上行驶的重型机械的稳定性分析。3D FEM 模型与分析模型

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Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148934

Aleksander Urbański, M. Richter

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A study of control scheme of debris flows and geological disasters in the Shiwei river basin 石围江流域泥石流与地质灾害防治方案研究

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Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148925

Han-Yang Wu

{"title":"A study of control scheme of debris flows and geological disasters in the Shiwei river basin","authors":"Han-Yang Wu","doi":"10.24425/ace.2024.148925","DOIUrl":"https://doi.org/10.24425/ace.2024.148925","url":null,"abstract":"The basic characteristics of debris flows in the Shiwei river basin are summarized through the field investigation on debris flows in the Shiwei river basin and analysis on formation conditions of debris flows from three aspects, i.e. geological environment, geological structure and neotectonic movement, as well as seismic action. Based on this, the stability of landslide in the Shiwei river basin is analyzed and calculated, and the stability coefficient of landslide is obtained. The debris flows in the Shiwei river basin will directly damage and threaten the county town, while other geological disasters such as landslide, collapse, slope sliding & collapse and potentially unstable slopes will indirectly damage and threaten the county town. The landslide form is clear, and the landslide stability calculation shows that the landslide body is generally stable – basically stable, but partially unstable – less stable. The “blocking + discharging” comprehensive control scheme is proposed according to the formation conditions and development characteristics of debris flows in the Shiwei river basin, and the study findings can be used as a reference for similar projects.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367177","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

Structural characteristics and variable mass permeability of fall column broken rock mass 落柱破碎岩体的结构特征和可变岩体渗透性

IF 0.7

Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148922

Jie Suo, Qirong Qin, Zhenhua Li

{"title":"Structural characteristics and variable mass permeability of fall column broken rock mass","authors":"Jie Suo, Qirong Qin, Zhenhua Li","doi":"10.24425/ace.2024.148922","DOIUrl":"https://doi.org/10.24425/ace.2024.148922","url":null,"abstract":"In order to analyze the relationship between the configuration characteristics, variable mass permeability characteristics and the catastrophe mechanism of falling column process, The influence of the permeability was studied by diffraction instrument, And using the seepage test system of the fall column, The seepage instability process of variable mass broken rock mass is analyzed, The findings suggest that, The proportion of coarse particles accounted for 89.86%, Fine particles accounted for 10.14%, Broken rock particles is better, Low compression performance; The fall column, under strong hydrodynamic conditions, Due to its strong characteristics of migration and loss with water flow, It is easy to induce the subsidence column protrusion water disaster; As the ratio between coarse and fine aggregates increases, Porosity and permeability are both increased; When the axial displacement does not change, With the increasing circumference pressure, The permeability of the broken rock samples is decreasing; The fitting of the seepage velocity of the broken rock mass to the pore pressure gradient follows the Forchheimer relationship, The seepage of the broken rock mass belongs to the category of non-Darcy flow under the triaxial stress; The instability of the subsidence column fracture rock mass presents three seepage instability forms: initial seepage stage, seepage mutation stage and piping stage in different stages.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140368549","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

Centrifugal shaking experiments and FEM analytical investigation on masonry block reinforcement of small earth dams 小型土坝砌块加固的离心振动实验和有限元分析研究

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Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148921

Bohan Wang, Yoshiyuki Mohri, H. Tagashira, Akira Izumi, Tadatsugu Tanaka

{"title":"Centrifugal shaking experiments and FEM analytical investigation on masonry block reinforcement of small earth dams","authors":"Bohan Wang, Yoshiyuki Mohri, H. Tagashira, Akira Izumi, Tadatsugu Tanaka","doi":"10.24425/ace.2024.148921","DOIUrl":"https://doi.org/10.24425/ace.2024.148921","url":null,"abstract":"In this research, a series of centrifuge model tests and dynamic response analyses were conducted to elucidate the impact of a composite structure comprised of a reinforced earth-pressure-resistant technique, using both masonry blocks and the reinforced earth method, which was installed at the slope toe end of an aged reservoir. The purpose of the study was to evaluate the seismic response of the embankment. The experimental tests included shaking table tests that were performed on an unreinforced embankment as well as a masonry block reinforced embankment, both in a water storage condition. The dynamic behavior of the embankment, as well as the propagation of slip failure, were compared and verified. Through the use of elasto-plastic dynamic response analysis, using the finite element method, the location of the slip surface, the settlement of the embankment and the dynamic response characteristics, as obtained experimentally, were examined to clarify the effects of the counter measure structure. The results indicate that the implementation of masonry blocks and the reinforcement installed behind them greatly improve the stability of the slope of the embankment, suppress the shear failure of the upper part of the embankment, and effectively prevent overall deformation of the embankment.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140365782","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

Evaluation of using hardening soil model for predicting wall deflections caused by deep excavation: A case study at the Ho Chi Minh metro line 1, Vietnam 使用硬化土壤模型预测深层开挖引起的墙体偏移的评估：越南胡志明地铁 1 号线案例研究

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Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148916

Luc Manh Bui, Li Wu, Yao Cheng, Dao Jun Dong

{"title":"Evaluation of using hardening soil model for predicting wall deflections caused by deep excavation: A case study at the Ho Chi Minh metro line 1, Vietnam","authors":"Luc Manh Bui, Li Wu, Yao Cheng, Dao Jun Dong","doi":"10.24425/ace.2024.148916","DOIUrl":"https://doi.org/10.24425/ace.2024.148916","url":null,"abstract":"The goal of this study is to assess the application of the Hardening soil model in predicting the deformation of retaining walls of excavations in 2D and 3D finite element analysis at the Ho Chi Minh Metro project. Designed as the deepest underground station in the first metro line built in Ho Chi Minh City (HCMC), Opera House station is located in an area with a dense building zone and close to historical buildings. A summary of the input soil properties is provided using data from site investigations, in-situ tests, and laboratory tests. By numerical simulation using the Hardening soil model, the parameters of the soil stiffness modulus value are verified based on the Standard Penetration Test (SPT), and Pressuremeter test (PMT). The obtained results of the numerical analysis by 2D and 3D finite element methods, and field observations indicate that applying the Hardening soil model with soil stiffness modulus obtained in situ tests gives reasonable results on the displacement of the retaining wall at the final phase. The relationship between the SPT value and the stiffness modulus of HCMC sand is a function of depth. This correlation is obtained through the comparison of wall deformation between the simulation and monitoring at the construction site. The results of the difference between 2D and 3D finite element analysis also are discussed in this study.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140368876","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

Application of the interval approach to determine the exploitation time of pipelines 应用区间法确定管道的开发时间

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Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148914

Iwona Duszyńska, T. Krykowski, P. Stefanek, Joanna Bzówka

引用次数: 0

Force analysis and treatments for Lidong tunnel of Renxin expressway crossing karst caves 仁新高速公路里洞隧道穿越岩溶洞穴的受力分析与处理

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Archives of Civil Engineering Pub Date : 2024-03-29 DOI: 10.24425/ace.2024.148936

Kai Zhu, Kui Zhang, Xiang-Dong Wu, Xiang-Ge Chen

{"title":"Force analysis and treatments for Lidong tunnel of Renxin expressway crossing karst caves","authors":"Kai Zhu, Kui Zhang, Xiang-Dong Wu, Xiang-Ge Chen","doi":"10.24425/ace.2024.148936","DOIUrl":"https://doi.org/10.24425/ace.2024.148936","url":null,"abstract":"There are several large karst caves at haunch part of the Lidong Tunnel during construction, together with inrush water due to high pressure within these caves. In light of it, this paper takes YK342+113 section as an example and adopts finite difference software FLAC 3D, so as to analyze tunnel deformation when crossing karst caves under six different working conditions, including with or without karst cave, before and after karst treatment, along with support locations. According to analysis results: First, the wall rock mainly had deformation at tunnel vault when evacuating at the third bench, which is a critical monitoring focus for tunnel construction; Second, karst cave treatment contributed to better conduct forces on both sides of wall rock, thus reducing vault settlement, while not affecting horizontal convergence and upturn of vaults; Third, treatment measures were proved to be effective in minimizing wall rock deformation by comparing deformation curves under different conditions; Fourth, after treatment measures, the angular points within the cave’s chamber had stress concentration, which might cause secondary collapse. Field monitoring data revealed that the final settlement of the tunnel vault was relatively consistent with the numerical analysis results, with a distinct change in daily settlement after initial support construction. By integrating numerical analysis and field monitoring, the rationality of the karst treatment plan was fully verified, providing a valuable reference for similar projects.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140366556","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