Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering最新文献_第2页

Technical Developments Related to Deep Cement Mixing Method in Hong Kong 香港深层水泥搅拌法的技术发展

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.21

P. Chung, Florence L. F. Chu, H. Cheung, C. Yan, Chris Cheung, A. Wong

{"title":"Technical Developments Related to Deep Cement Mixing Method in Hong Kong","authors":"P. Chung, Florence L. F. Chu, H. Cheung, C. Yan, Chris Cheung, A. Wong","doi":"10.21467/proceedings.133.21","DOIUrl":"https://doi.org/10.21467/proceedings.133.21","url":null,"abstract":"In recent years, deep cement mixing (DCM) method, a non-dredged ground improvement technique, has been adopted in several local large-scale reclamation works. It is also a robust ground improvement solution and can expedite land formation. Currently, design and construction methods adopted in Hong Kong are mostly referred to the practice or guidelines developed in other countries. With more local experience gained and in view of the potential application in possible coming mega development projects which involve reclamation and ground treatment works, it is considered worthwhile and timely to conduct more detailed studies to understand the engineering properties of the materials improved by this technique and to harness the design and construction practice, with a view to enhancing the cost effectiveness of DCM works. This paper briefly introduces some on-going research related to DCM method covering several design and construction aspects including engineering properties, ground investigation and laboratory testing using laboratory mixed and field mixed cores. The objectives, potential application and preliminary results of the studies are presented and discussed in the paper.","PeriodicalId":379153,"journal":{"name":"Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134272860","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: 2

Composition and Strength of Middle Pleistocene till in Lithuania 立陶宛中更新世土的组成和强度

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.26

I. Lekstutytė, Gintaras Žaržojus, Saulius Gadeikis, Gisela Domej, Š. Skuodis

引用次数: 0

Marine Deep Cement Mixing (Cutter Soil Mixing Technique) 海洋深层水泥搅拌(刀土搅拌技术)

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.31

D. Yung, R. Pang, Alex Y. M. Chan

{"title":"Marine Deep Cement Mixing (Cutter Soil Mixing Technique)","authors":"D. Yung, R. Pang, Alex Y. M. Chan","doi":"10.21467/proceedings.133.31","DOIUrl":"https://doi.org/10.21467/proceedings.133.31","url":null,"abstract":"In recent years, marine deep cement mixing was widely adopted in Hong Kong as the ground treatment method for many mega reclamation projects. Compared to the traditional dredging method, the deep cement mixing method is renowned for its environmentally friendly and high-quality standard. The installation of the deep cement mixing works will generate less vibration to the surrounding and prevents bringing the toxic material into the open water. Also, the deep cement mixing can provide a stable foundation for the land formation and comparatively less settlement is expected. The Cutter Soil Mixing technique is a type of deep cement mixing method. It is developed based on the Hydrofraise Cutter technology, crushing the soil through two counter-rotary cutters, and simultaneously mixed with a slurry binder to achieve the contract required strength. This paper presents a recent ground improvement project in Hong Kong with the application of marine Cutter Soil Mixing technique. Several essential working parameters such as mixing factor, dosage design and the criterion to achieve the top of competent stratum for the Cutter Soil Mixing installation are discussed. In addition, real time supervision and monitoring system by using a set of sophisticated instruments are introduced. The environmental considerations and measures of the project are also presented in this paper.","PeriodicalId":379153,"journal":{"name":"Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130145780","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

Active Site Supervision to Enhance Drilling & Blasting 积极现场监督，提高钻孔爆破水平

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.18

Simon W K Leung, Elton M Y Ko

引用次数: 0

Two Major Technical Solutions on the Lung Shan Tunnel – Pilot TBM Tunnel Enlargement and TBM U-turn in Cavern 龙山隧道的两项主要技术方案-隧道掘进机扩洞试验及隧道掘进机在洞室掉头

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.19

X. Monin, L. Jeanne, V. Tricot, R. Storry

引用次数: 0

3D Geological Modelling and Management System 三维地质建模与管理系统

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.6

Y.B Liu, T. Xiao, L. Zhang

{"title":"3D Geological Modelling and Management System","authors":"Y.B Liu, T. Xiao, L. Zhang","doi":"10.21467/proceedings.133.6","DOIUrl":"https://doi.org/10.21467/proceedings.133.6","url":null,"abstract":"A three-dimensional (3-D) geological model has been established for Hong Kong using existing borehole data in order to facilitate detailed site investigations for future engineering projects. This study aims to digitalise ground investigation data in Hong Kong, develop easy-to-use tools for 3-D borehole management and visualisation, and eventually establish 3-D geological models for Hong Kong. The modelling capabilities include geological data retrieval and processing, geological cross-section creation, fence diagrams and 3-D model construction. With approximate 90,000 boreholes processed, 3-D virtual boreholes can be created and managed using ArcGIS Pro. Further, cross-sectional diagrams, fence diagrams and 3-D models can be created and presented. The 3-D geological model established shows the complexity of Hong Kong geological formation layers. Building a 3-D geological model based on machine learning or artificial intelligence is proved to be a feasible way to provide an accurate evaluation of soil layering. The interpreted cross-sections and constructed fence diagrams help engineers and geologists to better understand the complicated sub-surface profiles in a 3-D way, and provide estimates of the volumes of different types of soil locally. The 3-D model will become a design tool for future city and infrastructure planning and constructions.","PeriodicalId":379153,"journal":{"name":"Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134086262","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

Machine Learning-based Natural Terrain Landslide Susceptibility Analysis – A Pilot Study 基于机器学习的自然地形滑坡易感性分析-试点研究

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.8

H. W. Li, R. H. Li, C. Wong, F. C. Lo

{"title":"Machine Learning-based Natural Terrain Landslide Susceptibility Analysis – A Pilot Study","authors":"H. W. Li, R. H. Li, C. Wong, F. C. Lo","doi":"10.21467/proceedings.133.8","DOIUrl":"https://doi.org/10.21467/proceedings.133.8","url":null,"abstract":"Recently, the Geotechnical Engineering Office has initiated a pilot study on data-driven landslide susceptibility analysis (LSA) using a machine learning (ML) approach. A study area covering about one-fifth of the total natural hillside area of Hong Kong on and around the Lantau Island was considered. Three common tree-type ML classifiers: Decision Tree, Random Forest and XGBoost have been used. Conditioning factors (or features) including rainfall, geological and topography-related features were considered. In the study, the domain knowledge on natural terrain landslides in Hong Kong were critically incorporated into the susceptibility models through feature engineering to ensure that the resulted models are physically meaningful. In addition, an approach proposed to resolve the serious data imbalance problem, which is common in LSA, will be highlighted. Under this approach, the predicted probabilities of the positive class (i.e., landslide) can also be taken as a proxy to the landslide probability. This paper reports the methodology and key findings of this pilot study. The approach can be extended to cover other ML algorithms and features, and to a territory-wide scale with a view to enhancing the resolution and accuracy of the current susceptibility model of natural hillsides in Hong Kong.","PeriodicalId":379153,"journal":{"name":"Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering","volume":"284 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122970469","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

An Unprecedented Land Supply Means in Hong Kong: Under-ground Quarrying-cum-Cavern Development 香港史无前例的土地供应方式:地下采石及洞穴开发

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.36

W. H. Tsang, Y. Ho, C. Chan

{"title":"An Unprecedented Land Supply Means in Hong Kong: Under-ground Quarrying-cum-Cavern Development","authors":"W. H. Tsang, Y. Ho, C. Chan","doi":"10.21467/proceedings.133.36","DOIUrl":"https://doi.org/10.21467/proceedings.133.36","url":null,"abstract":"Cavern development is a viable source of land supply, which can provide solution space for a broad variety of land uses and preserve the valuable ecology and green environment at the ground surface. While most of the caverns are purposely built to house various facilities, underground quarrying-cum-cavern development at suitable sites is a viable means of creating a valuable cavern land bank. With thoughtful planning and prudent site selection, the operation of an underground quarry associated with concrete batching and asphalt production operations can be a self-financing or even profitable business in the short to medium term, while the cavern space created can be utilized for other strategic uses in the long term. To take forward this initiative, the Civil Engineering and Development Department has completed a technical study to establish the technical feasibility and possible implementation arrangement of underground quarrying-cum-cavern development in Hong Kong. A prototype reference design based on the site setting of the Lam Tei Quarry has been produced, considering factors including technical, operational and logistic considerations. This paper presents the findings of the study, including the reference design and implementation model, and discusses the prospect of the underground quarry-cum-cavern development as a land supply means in Hong Kong.","PeriodicalId":379153,"journal":{"name":"Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121463780","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

An Alternative Approach for Semi-Automatic Delineation of Rock Blocks on 3D Meshes and Engineering Application 岩石块体三维网格半自动圈定方法及工程应用

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.14

Regine Tsui, Jonathan Hart, W. Hou, Alan Ng

{"title":"An Alternative Approach for Semi-Automatic Delineation of Rock Blocks on 3D Meshes and Engineering Application","authors":"Regine Tsui, Jonathan Hart, W. Hou, Alan Ng","doi":"10.21467/proceedings.133.14","DOIUrl":"https://doi.org/10.21467/proceedings.133.14","url":null,"abstract":"Auto-identification of rock blocks on 3D models is a useful new tool for rock engineering. It has the potential, when undertaken with rock engineering professionals, to delineate remotely, potentially unstable rock blocks associated with adverse discontinuities. An alternative approach is proposed to semi-automatically delineate rock blocks on 3D meshes, which does not require prior extraction and fitting of discontinuity planes. The proposed approach starts with trace extraction, exploiting the fact that the contact between two rock blocks is most often manifested by a trace (i.e., an exposed line) on the rock surface. Geometrically, the trace is usually either a concave edge or a depressed line. These traces are first extracted due to their higher concavity or darkness compared to their neighbouring mesh faces. After post-processing, the mesh is segmented into sub-meshes around the extracted trace lines. The algorithms are implemented in Python and are tested on three rock slopes, including: (1) a rock slope in Ouray, USA; (2) a natural rock outcrop in Ma Shi Chau, Hong Kong; and (3) a rock slope in a former quarry currently being redeveloped as part of a large-scale site development in Hong Kong. Our approach can enrich the rock mapping results and help identify critical rock blocks which may be at risk of planar failure.","PeriodicalId":379153,"journal":{"name":"Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115969472","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

Observational Method for Ground Treatment of Tunnel Cross Passages in Complex Ground Conditions 复杂地基条件下隧道穿越通道地基处理的观测方法

Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering Pub Date : 2022-09-17 DOI: 10.21467/proceedings.133.40

T. Sacadura, N. Taylor, J. Gaudon, K. Sevecek, R. Storry, X. Monin

{"title":"Observational Method for Ground Treatment of Tunnel Cross Passages in Complex Ground Conditions","authors":"T. Sacadura, N. Taylor, J. Gaudon, K. Sevecek, R. Storry, X. Monin","doi":"10.21467/proceedings.133.40","DOIUrl":"https://doi.org/10.21467/proceedings.133.40","url":null,"abstract":"This paper focuses on the design and review of the ground treatment and rock fissure grouting required to excavate tunnel Cross-Passages in the Liantang / Heung Yuen Wai Boundary Control Point Site Formation and Infrastructure Works – Contract 2 in Hong Kong SAR. The Cross-Passages were expected to go through Tuff in various degrees of weathering (Grade V to Grade III/II). The Site Investigation, SI, showed that SPTs numbers generally ranged from 30 to 50 for the Completely to Highly Decomposed Tuff, CDT / HDT, with localised values as low as 6. Ground Treatment consisting of permeation and rock fissure grouting as well as 120° pipe roof / canopy tubes, was required to ensure not only the stability during excavation but also limit the groundwater inflow. The SI determined in-situ permeabilities ranging from 1x10-5 to 1x10-6 m/s for the CDT and a 21m long probe hole recorded a water inflow in excess of 60 l/minute. A discussion relative to the methods employed for drilling, e.g. pressure balance drilling system, drilling alignment tools used, and grouting techniques, e.g. microfine cement, chemical grout is presented in this paper. The use of drilling survey tools integrated with 3D representation models of the cross-passage and the ground treatment is discussed. A review of the overall performance of the Cross-Passage, e.g. groundwater inflow, stability, is undertaken.","PeriodicalId":379153,"journal":{"name":"Proceedings of The HKIE Geotechnical Division 42nd Annual Seminar: A New Era of Metropolis and Infrastructure Developments in Hong Kong, Challenges and Opportunities to Geotechnical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130555560","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