Article
Construction & Building Technology
Chenghao Han, Jiuchuan Wei, Weijie Zhang, Fei Yang, Huiyong Yin, Daolei Xie, Chao Xie
Summary: This study quantitatively analyzes the influence of multiple parameters on grouting engineering projects in sand layers through laboratory tests and model establishment, obtaining evaluation indices and formulas for groutability and grouting reinforcement effect.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Chemical
Linsheng Liu, Hongbo Wang, Shijie Zheng, Lianglin Dong, Yunchang Yu, Chunyu Yang
Summary: This paper investigates the performance degradation law of grouting-reinforced body under seepage and establishes a damage mechanics model. Experimental studies are carried out to examine the influence of permeation water pressure on the permeability and damage variables of the grouting-reinforced body. The research findings show that seepage has a significant impact on the damage of grouting-reinforced body and a quantitative relationship between permeation pressure, time, and damage variables is obtained.
Article
Green & Sustainable Science & Technology
Yazhou Ou, Gang Tian, Junjie Chen, Guoguang Chen, Xiaoyu Chen, Hai Li, Binggang Liu, Tianyu Huang, Mengyun Qiang, Alfrendo Satyanaga, Qian Zhai
Summary: This study investigates the feasibility of recycling waste slag as a component in grouting material and demonstrates through experimental measurements that the performance of recycled slag grouting material is similar to that of the original material.
Article
Chemistry, Physical
Chuen-Ul Juang, Wen-Ten Kuo
Summary: With the growth of offshore wind power worldwide, the development of a green and eco-friendly grouting material (GEGM) has become a global focus. In this study, a GEGM using environmentally friendly recycled materials was developed for future offshore wind turbine construction. Various factors such as water-to-binder ratios, replacement of cement, addition of superplasticizers, and sand content were evaluated to determine the mechanical properties, workability, and durability of the GEGM. The study results provide reliable information and can serve as a reference for future construction projects.
Article
Geosciences, Multidisciplinary
Cao Lei, Jingwei Liang, Wang Xiang, Maiyong Jiang, Li Jinyou, Jiang Chu
Summary: Grouting is an important method for fortifying water-bearing sand layers, and this study proposes a superfine cement-bentonite-based emulsified asphalt composite grout (CACG) for infiltrating these layers. CACG, which utilizes superfine cement, bentonite, and emulsified asphalt, exhibits good pumpability, fluidity, stability, and compressive strength. The optimal formulation of CACG consists of a water/superfine cement ratio of 1:1, a bentonite content of 6.5%, and an emulsified asphalt content of 20%. Field tests confirm that CACG not only meets engineering requirements but also proves to be cost-effective.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Construction & Building Technology
Tianhua Wu, Yongtao Gao, Yu Zhou
Summary: This study proposes a new grouting material (CSGSA) for pre-reinforcement of shield tunneling adjacent to existing piles. The optimal formula ratios of CSGSA were determined through a series of testing methods, and the microcosmic mechanism of its functioning was analyzed. The CSGSA material was validated in a field engineering case, demonstrating its low-cost and eco-friendly features.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Environmental Sciences
Heng Liu, Zixian Shi, Zhenyu Li, Yuke Wang
Summary: This paper investigates the compressive strength and influencing factors of fine sand layers reinforced by permeable polymers. Experimental tests and analysis reveal that grouting pressure, curing days, moisture content, and porosity are the main factors affecting the strength of reinforced sand layers.
Article
Multidisciplinary Sciences
Weiqiang Qi, Zhiyong Yang, Yusheng Jiang, Xing Yang, Xiaokang Shao, Hongbin An
Summary: Synchronous grouting plays a significant role in shield tunnels, impacting the stability of the excavation face and segment structure. Testing mortar setting time and early strength, as well as conducting flow table and oedometer tests, can ensure optimal grouting performance and structural safety. Using well-graded materials and high-efficiency additives can enhance early strength formation in grout and reduce the likelihood of pipe plugging.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Geological
Yitian Xu, Yan Zhang, Junjie Huang, Guoqing Chen
Summary: This study investigated the effects and processes of water-glass-cured sandy soil by conducting direct shear tests and uniaxial compressive strength tests. The relationships between modulus, Baume degree, curing time, and strength of cured sandy soil were summarized from a macroscopic mechanical point of view. The consolidation evolution of cured sandy soil, including pore structure and gel state, was revealed from a microscopic point of view using nuclear magnetic resonance (NMR) imagery and scanning electron microscopy (SEM). The results showed that the migration of water glass and the deepening of curing are key processes controlling the consolidation effect. The state of the silica gel plays a decisive role in the strength of the cured sandy soil.
ENGINEERING GEOLOGY
(2022)
Article
Construction & Building Technology
Lun Gong, Jiaqi Feng, Ping Zhou, Dishuang Sun, Feicong Zhou, Hui Hu, Lichuan Wang
Summary: This paper investigates the bearing failure characteristics and support parameters of pipe roof support in super shallow buried double track railway tunnel crossing soft surrounding rock through theoretical analysis, laboratory tests, and numerical simulation. Based on the analysis of load and load range, the mechanical analysis model of the pipe roof is selected. Laboratory tests are conducted to analyze the influence of pipe diameter, wall thickness, grouting fullness, and reinforcement cage measures on the bearing capacity of pipe roof grouting steel pipes. The results are compared with numerical simulations for verification, leading to the conclusion that a fully grouted steel pipe with a wall thickness of 4 mm and a diameter of 108 mm without reinforcement cage can meet the support capacity requirements for most super shallow buried double track railway tunnels crossing soft surrounding rock.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Xiaqing Qian, Peng Zhang, Shengnian Wang, Shuangfeng Guo, Xinyu Hou
Summary: This study introduced a solution of grouting additives and information-based construction of jet grouting in water-rich sand stratum. The study screened suitable grouting additives and developed the mix proportion of grouting fluids. Information-based construction technique was used to control the grouting quantity. The validity of grouting additives and information-based construction was verified through tests.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Rui Wang, Haoqing Xu, Yi Liu, Pengming Jiang, Aizhao Zhou
Summary: Using the case study of the Nanjing Dinghuaimen Yangtze River Tunnel project, a method was proposed to reuse excavated silty-fine sand by adjusting the waste sand proportion to replace commercial sand. This addresses the issue of recycling the substantial amount of waste sand generated during the slurry shield passing through the silty-fine sand stratum. Various grout indicators and the impact of sand particle size and distribution on grout performance were evaluated. The findings reveal that increasing the replacement ratio gradually improves grout density, fluidity, consistency, and bleeding rate, while volumetric shrinkage initially increases before decreasing, and the setting time decreases gradually before unconfined compressive strength initially decreases and then increases. The critical factor that influences grout performance when the replacement ratio is below 50% is the weakening adsorption effect of fine sand particles on water due to the increase in sand fineness modulus. When the replacement ratio surpasses 50%, the nonuniform distribution of sand particle size and the filling of voids by fine particles between larger particles contribute to changes in grout properties.
Article
Construction & Building Technology
Shuai Zhang, Yan He, Honggang Zhang, Jie Chen, Leping Liu
Summary: The rheological properties and mechanical properties of OAASGM with different content of fine sand powder were systematically evaluated in this study. It was found that fine sand powder effectively improved the flowability and prolonged the setting time of OAASGM, meeting the requirements of semi-flexible pavement.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Civil
Tingjin Liu, Shuyi Zhang, Kepeng Yu, Hongyuan Liu
Summary: This study investigates the deformation and cracking mechanism of tunnel segments excavated in complex mixed grounds using the combined mining and shield tunneling method. Insufficient pea-gravel fillings and uneven grouting pressures are identified as the causes of deformation and cracking. To minimize these issues, the angle range of the tunnel wrapped in pea gravel should be greater than 180 degrees, and the resistance coefficient provided by the filling layer after grouting should be greater than 20 MPa/m. Moreover, the difference in grouting pressures at the top and bottom of the tunnel significantly affects the overall deformation and opening amount of the segment joints.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Jiaqi Zhang, Chunfeng Zhao, Yue Wu
Summary: This study investigates the behavior and performance of grouted piles in cast-in-place bored pile engineering projects, providing valuable insights into the optimization of grouting methods and parameters for enhancing pile-bearing capacity. The results indicate that pile-side grouting is more effective in controlling pile settlement, while tip-side-combined grouting exhibits superior reinforcement effects. The formation of a grout bubble after grouting enhances the lateral friction resistance of the pile. The study emphasizes the significance of grouting volume on bearing capacity, settlement control, lateral friction resistance, and grout bubble size in grouted piles.
APPLIED SCIENCES-BASEL
(2023)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)
