Insight - Civil Engineering最新文献

Engineering geological and geotechnical evaluation of Sathya Sai Prasanthi Nilayam railway tunnel, Andhra Pradesh, India 印度安得拉邦 Sathya Sai Prasanthi Nilayam 铁路隧道的工程地质和岩土评估

Insight - Civil Engineering Pub Date : 2024-07-22 DOI: 10.18282/ice.v7i1.616

A. Naithani, P. Jain

{"title":"Engineering geological and geotechnical evaluation of Sathya Sai Prasanthi Nilayam railway tunnel, Andhra Pradesh, India","authors":"A. Naithani, P. Jain","doi":"10.18282/ice.v7i1.616","DOIUrl":"https://doi.org/10.18282/ice.v7i1.616","url":null,"abstract":"Detailed engineering geological investigations were carried out for a railway tunnel which was constructed more than two decades ago. 3D engineering geological mapping was carried out using Brunton Compass and Total Station Surveying instruments in 1:100 scale. Coarse-grained pink and grey granite, hornblende-biotite gneiss and dolerite dyke of Archaean age and Lower Proterozoic age were mapped. Rock mass was intersected by sub-horizontal, inclined, and vertical joint sets, which were continuous and persistent, smooth, and planar with thick filling of decomposed and crushed sheared material or with thin coating of clay material. Based on the Q-system, rock mass was classified into different classes. On the basis of large-scale engineering geological mapping and Norwegian Method of Tunnelling, a support system was recommended which includes rock bolt, fibre reinforced shotcrete, grouting and reinforced ribs of sprayed concrete and the same is implemented by the agency. As per the best knowledge of the authors, reinforced ribs of sprayed concrete are first time used for transportation tunnels in India and it will be more effective if it will be compared with ISMB or Lattice Girder.","PeriodicalId":417409,"journal":{"name":"Insight - Civil Engineering","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141815389","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

Study on compaction characteristics and discrete element simulation for rubber particle-loess mixed soil 无橡胶颗粒混合土的压实特性和离散元模拟研究

Insight - Civil Engineering Pub Date : 2024-07-22 DOI: 10.18282/ice.v7i1.618

Wen-qi Kou, Jian-guang Bai, Hai-jun Li, Qing-hong Liu

{"title":"Study on compaction characteristics and discrete element simulation for rubber particle-loess mixed soil","authors":"Wen-qi Kou, Jian-guang Bai, Hai-jun Li, Qing-hong Liu","doi":"10.18282/ice.v7i1.618","DOIUrl":"https://doi.org/10.18282/ice.v7i1.618","url":null,"abstract":"The rapid surge in traffic volume in China has resulted in a substantial accumulation of waste tires. By harnessing the lightweight and deformable characteristics of tire rubber particles, they are combined with soil to form rubber particle-loess mixed soil, which is progressively being embraced in civil engineering as a pivotal approach towards attaining green and sustainable development. In this study, waste tire rubber particles were integrated into loess to generate rubber particle-loess mixed soil, and compaction tests were conducted to investigate its compaction characteristics. Furthermore, PFC3D (Particle Flow Code 3D) was utilized for simulating the bearing ratio test of rubber particle-loess mixed soil, thereby validating the feasibility of numerical simulation for calculating CBR (California bearing ratio) values and exploring the relationship between micromechanical characteristics and macroscopic characteristics of such mixtures. The findings indicate that the maximum dry density of rubber particle-loess mixed soil significantly decreases with an increasing content of rubber particles. The utilization of PFC3D discrete element software proves efficacious in examining the bearing capacity of this mixture. Notably, when 20 mesh rubber particles constitute 20% by volume, the CBR value reaches its pinnacle and exhibits optimal bearing capacity. From a micromechanical perspective, the variation in internal porosity of rubber particle-loess mixed soil is positively associated with changes in macroscopic optimal water content, and negatively associated with changes in macroscopic CBR value. incorporating rubber particles enhances resistance against external forces while diminishing deformation within loess. This study provides a guidance for the efficient utilization of waste tires and the improvement of loess’s characteristics.","PeriodicalId":417409,"journal":{"name":"Insight - Civil Engineering","volume":"80 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141817765","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

Analysis on Energy-Saving and Green Technology and Optimization Measures in Civil Engineering Construction 土木工程施工中节能绿色技术及优化措施分析

Insight - Civil Engineering Pub Date : 2020-10-22 DOI: 10.18282/ice.v3i2.356

D. Qi

引用次数: 0

Problems and Countermeasures of Double Row Pile Support Structure of Deep Foundation Pit in Geotechnical Engineering 岩土工程中深基坑双排桩支护结构存在的问题及对策

Insight - Civil Engineering Pub Date : 2020-06-02 DOI: 10.18282/ice.v3i1.308

Y. Sun

引用次数: 1

Study on Thermal Insulation Measures for Construction of Reinforcement Sleeve Grouting Connection in Winter 冬季加固套筒注浆连接施工保温措施研究

Insight - Civil Engineering Pub Date : 2020-06-02 DOI: 10.18282/ice.v3i1.314

Fangzhen Zhu, Wenbo Li, Benguo Xing, Lulu Zhang