May 19-22, 2019 Qingdao, China International Conference on Pacific
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Distribution Features of the Minimum Rock Cover Thickness of the Surrounding Rock Self-Stability of the Metro Tunnel in the Soil-Rock Dualistic Stratum
Hindawi Advances in Civil Engineering Volume 2020, Article ID 9120983, 12 pages https://doi.org/10.1155/2020/9120983 Research Article Distribution Features of the Minimum Rock Cover Thickness of the Surrounding Rock Self-Stability of the Metro Tunnel in the Soil-Rock Dualistic Stratum Ziguang Zhang ,1 Tao Xu,2 Guangyong Cao ,1 and Xiaofeng Liu2 1Anhui Province Key Laboratory of Building Structure and Underground Engineering, Anhui Jianzhu University, Hefei, China 2Anhui Sijian Holding Group Co., Ltd., Hefei, China Correspondence should be addressed to Ziguang Zhang; [email protected] Received 1 November 2019; Revised 28 January 2020; Accepted 27 March 2020; Published 8 July 2020 Academic Editor: Flavio Stochino Copyright © 2020 Ziguang Zhang et al. +is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Based on the maximum value of the self-stability of surrounding rock, the key issues affecting the distribution of the minimum mock cover thickness of the surrounding rock self-stability (MRCT-SRS) of the metro tunnel in the soil-rock dualistic stratum are discussed. +e MRCT-SRS was studied for different soft stratum thicknesses Hs and excavation spans D based on cusp catastrophe theory. Moreover, the 3D spatial distribution was determined, and the fitted curves were constructed according to the MRCT-SRS, Hs, and D. +is facilitated the assessment of the stability of the surrounding rock in the excavation of a metro tunnel. Combined with the construction practices used for the Qingdao metro project, the validity of the obtained MRCT-SRS has been verified by the inverse analysis of the monitored data from the metro tunnel. -
Program Book of the Ninth Training Course
UNESCO/IOC-ODC TRAINING COURSE ON CLIMATE DYNAMICS AND AIR-SEA INTERACTIONS PROGRAMME 17-28 June 2019, Qingdao, China Hosted by The First Institute of Oceanography (FIO), Ministry of Natural Resources (MNR), China Contents 1. Background ........................................................................................................ 1 2. Training Program ................................................................................................ 2 2.1 Time Schedule ............................................................................................... 2 2.2 Place for Training ........................................................................................... 4 2.3 Lecturers and Resource Persons ..................................................................... 5 3. Other Activities .................................................................................................. 7 3.1 Trainee Reports ............................................................................................. 7 3.2 Group Discussion and Reports ....................................................................... 8 3.3 Trainee Certificates and Awards ..................................................................... 8 4. Useful Information ............................................................................................. 9 4.1 A map around FIO .......................................................................................... 9 4.2 Transportation ............................................................................................ -
Passenger Flow Prediction Based on Land Use Around Metro Stations: a Case Study
sustainability Article Passenger Flow Prediction Based on Land Use around Metro Stations: A Case Study Ciyun Lin 1 , Kang Wang 1, Dayong Wu 2 and Bowen Gong 1,3,* 1 Department of Traffic Information and Control Engineering, Jilin University, Changchun 130022, China; [email protected] (C.L.); [email protected] (K.W.) 2 Texas A&M Transportation Institute, Texas A&M University, College Station, Texas, TX 77843, USA; [email protected] 3 Jilin Engineering Research Center for ITS, Jilin University, Changchun 130022, China * Correspondence: [email protected] Received: 26 July 2020; Accepted: 21 August 2020; Published: 23 August 2020 Abstract: High-density land uses cause high-intensity traffic demand. Metro as an urban mass transit mode is considered as a sustainable strategy to balance the urban high-density land uses development and the high-intensity traffic demand. However, the capacity of the metro cannot always meet the traffic demand during rush hours. It calls for traffic agents to reinforce the operation and management standard to improve the service level. Passenger flow prediction is the foremost and pivotal technology in improving the management standard and service level of metro. It is an important technological means in ensuring sustainable and steady development of urban transportation. This paper uses mathematical and neural network modeling methods to predict metro passenger flow based on the land uses around the metro stations, along with considering the spatial correlation of metro stations within the metro line and the temporal correlation of time series in passenger flow prediction. It aims to provide a feasible solution to predict the passenger flow based on land uses around the metro stations and then potentially improving the understanding of the land uses around the metro station impact on the metro passenger flow, and exploring the potential association between the land uses and the metro passenger flow. -
Research on Surface Subsidence of Long-Span Underground Tunnel
Hindawi Advances in Civil Engineering Volume 2021, Article ID 6643892, 13 pages https://doi.org/10.1155/2021/6643892 Research Article Research on Surface Subsidence of Long-Span Underground Tunnel Jun Yan,1,2 Xueying Liu,3 Xiaoyu Bai ,3,4 Mingyi Zhang,3,4 Yujin Jiao,5,6 Desheng Jing,3 Honghua Liu,1,2 Zhongsheng Wang,1,2 and Wen Kang1 1Qingdao Geo-Engineering Surveying Institute, Qingdao 266071, China 2 e Key Laboratory of Urban Geology and Underground Space Resources, Shandong Provincial Bureau of Geology and Mineral Resources, Qingdao 266590, China 3Department of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, China 4Cooperative Innovation Center of Engineering Construction and Safety, Shandong Blue Economic Zone, Qingdao, Shandong 266033, China 5Qingdao Shibei Binhai New Area Management Committee, Qingdao, Shandong 266000, China 6Qingdao Metro Group Co., Ltd., Qingdao, Shandong 266033, China Correspondence should be addressed to Xiaoyu Bai; [email protected] Received 11 November 2020; Revised 27 April 2021; Accepted 8 May 2021; Published 25 May 2021 Academic Editor: Valeria Vignali Copyright © 2021 Jun Yan et al. -is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. In the process of urban rail transit construction, underground excavation method is often used in subway station construction. Based on a large number of measured data of Qingdao Metro Line 3, this paper analyzes and studies the ground subsidence law of long-span shallow buried excavation station. -e research results show that vertical surface settlement will be caused by the excavation of both sides of the guide hole, but the settlement is relatively small, basically within −10 mm. -
Development and Engineering Application of Strong Permeability Grouting Material for Weathered Granite Formation
Revista Română de Materiale / Romanian Journal of Materials 2019, 49 (3), 379 - 387 379 DEVELOPMENT AND ENGINEERING APPLICATION OF STRONG PERMEABILITY GROUTING MATERIAL FOR WEATHERED GRANITE FORMATION CHUNQUAN DAI , YANXIA LONG, ZEJUN SHI, GUANGXUE XING, WENZENG HOU Key Laboratory of Disaster Prevention and Reduction of Civil Engineering in Shandong Province, Qingdao 266590, China College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, China Considering the high permeability and low strength of weathered granite in tunnelling and underground projects, this paper develops strong permeability grouting (SPG) materials with good fluidity, excellent impermeability and long durability based on the features of the weathered granite formation. The materials can repair and reinforce the weathered granite formation through permeation grouting. Besides, the author tested the basic mechanical properties of the proposed SPG materials, and applied them to a tunnelling project of Qingdao Metro. The test and application results show that the SPG materials enjoy great wettability and permeability to granite; the SPG materials can meet the requirements for grouting projects in granite formation, due to the good strength and impermeability of their concretions; the SPG slurries require easy steps and a low grouting pressure in construction. The promotion and application of the proposed SPG materials will definitely bring good economic and social benefits, owing to the huge demand for high-performance grouting materials at home and abroad. Keywords: Grouting Material; Weathered Granite; Orthogonal Test; Permeability 1. Introduction overcomes the defects of traditional materials in dealing with the engineering problems caused by In underground engineering, the construction weathered granite. Such a material will definitely team often encounters deep, thick formation of promote the development of grouting technology intensely, if not completely, weathered granite with and the construction of underground projects. -
Spatial Variation of Taxi Demand Using GPS Trajectories and POI Data
Hindawi Journal of Advanced Transportation Volume 2020, Article ID 7621576, 20 pages https://doi.org/10.1155/2020/7621576 Research Article Spatial Variation of Taxi Demand Using GPS Trajectories and POI Data Xinmin Liu,1,2 Lu Sun ,1 Qiuxia Sun ,3 and Ge Gao 1,4 1College of Economics and Management, Shandong University of Science and Technology, Qingdao, China 2Qingdao Agricultural University, Qingdao, China 3College of Mathematics and Systems Science, Shandong University of Science and Technology, Qingdao, China 4College of Transportation, Shandong University of Science and Technology, Qingdao, China Correspondence should be addressed to Lu Sun; [email protected] Received 3 June 2019; Revised 21 August 2019; Accepted 3 September 2019; Published 13 January 2020 Academic Editor: Gonçalo Homem de Almeida Correia Copyright © 2020 Xinmin Liu et al. is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Taxi as a door-to-door, all-weather way of travel is an important part of the urban transportation system. A fundamental understanding of temporal-spatial variation and its related inuential factors are essential for taxi regulation and urban planning. In this paper, we explore the correlation between taxi demand and socio-economic, transport system and land use patterns based on taxi GPS trajectory and POI (point of interest) data of Qingdao City. e geographically weighted regression (GWR) model is used to describe the inuence factors of spatial heterogeneity of the taxi demand and visualize the spatial distributions of parameter estimations. -
Ieee/Cic Iccc 2017
IEEE/CIC ICCC 2017 IEEE/CIC ICCC 2017 Time/Day Sunday, 22 October 2017 Monday, 23 October 2017 Tuesday, 24 October 2017 08:00-08:30 Conference Registration Welcome Opening Ceremony Conference Registration Best Paper Awards Ceremony for IEEE/CIC ICCC 2017 Conference Registration 08:30-09:00 Best Paper Awards Ceremony for China Communications (Golden Olive Hall ) Keynote Speech #1: Connected Vehicles for Modern Transportation Systems Keynote Speech #3: Synthetic Molecular Communication 09:00-09:45 Prof. Xuemin (Sherman) Shen Prof. Robert Schober Tutorial 1 Tutorial 2 Tutorial 3 Tutorial 4 ( Golden Olive Hall ) (Golden Olive Hall ) IoT (B Room) (C Room) (D Room) (E Room) Keynote Speech #2 : Accelerating Design and Test for 5G mmWave Keynote Speech #4: Recent Progress of 3U Optical Transmission Systems 09:45-10:30 Workshop Mr. James Kimery Prof. Shaohua Yu (A Room) (Golden Olive Hall ) (Golden Olive Hall ) 10:30-11:00 Coffee Break Coffee Break & Poster Session-1 Coffee Break & Poster Session-3 IoT Tutorial 1 Tutorial 2 Tutorial 3 Tutorial 4 WCS-1 WCS-2 OCSN-1 WNM-1 SPC-1 Invited-1 WCS-6 WCS-7 OCSN-2 STC-1 SNBD Invited-4 11:00-12:30 Workshop (B Room) (C Room) (D Room) (E Room) (A Room) (B Room) (C Room) (D Room) (E Room) (F Room) (A Room) (B Room) (C Room) (D Room) (E Room) (F Room) (A Room) 12:30-14:00 Lunch Lunch Lunch Steering VLC Tutorial 5 Tutorial 6 Tutorial 7 Tutorial 8 IAP-1 WCS-3 Committee WNM-2 SPC-2 Invited-2 IAP-2 WCS-8 WNM-3 STC-2 SPC-3 Invited-5 14:00-15:30 Workshop (B Room) (C Room) (D Room) (E Room) (A Room) (B Room) Meeting