MINISTRY OF EDUCATION MINISTRY OF AGRICULTURE AND TRAINING AND RURAL DEVELOPMENT THUY LOI UNIVERSITY VU THI HIEN DESIGNING STRUCTURES TO PROTECT EMBANKMENT AT THE ECONOMIC ZONE OF MASTER THESIS HANOI, 2018 MINISTRY OF EDUCATION — MINISTRY OF AGRICULTURE. AND TRAINING AND RURAL DEVELOPMENT ‘THUY LOI UNIVERSITY VU THI HIEN DESIGNING STRUCTURES TO PROTECT EMBANKMENT AT THE ECONOMIC ZONE OF NAM DINH VU - HAI PHONG Major code: 6258023 SUPERVISOR: ASSC. LE XUAN ROANH HA NOI, 2018 DECLARATION With proposal: “Designing Structures to Protect Embankment at The Economic Zone of Nam Dinh Vu ~ Hai Phong”. Thereby declare that is the researched work by myself under the supervision of Assoc.
Le Xuan Roanh, The results and conclusions of the thesis are fidelity, which are not copied from any sources and any forms. The reference documents relevant sources, the t sis has cited and recorded and prescribed. The results of my thesis have not been published by me to any courses or any awards, I declare that the information provided in this document is correct and assume full responsibility for any untrue or incorrect information. Hanoi, May date 2018 Author of the thesis Vu Thi Hien ACKNOWLEDGEMENTS With the effort of myself and teacher's help, colleague, friends and family, the graduation thesis on “Designing Structures to Protect Embankment at The Economic Zone of Nam Dinh Vu ~ Hai Phong” have been completed Firsily, let me express deep gratitude to Assoc.
Le Xuan Roanh has guided me ‘wholeheartedly during the research, research and implementation of this thesis. 1 would also like to express my sincere gratitude tothe teachers in Marine Engineering Faculty - Water Resources University for giving me more time to help me finish my dissertation ‘Thank to my family, friends and colleagues who have facilitated and helped me throughout my studies and research. Thank you very much! 1 CONTENTS DECLARATION i ACKNOWLEDGEMENTS nnn CONTENTS ii LIST OF FIGURES. vi LIST OF TABLES.
Objects and scope of the wtudy,. Study approaches and methodology. Expected results on so so = 3 6. Structure of thesis.
3 CHAPTER | OVERVIEW ABOUT PROTECTED SEADIKE AND ‘CONSTRUCTED EXPENSIVE METHODS 5 1.1 Concept about sea dike and embankment : _- 1.1 Concept about sea-dike, 5 1.2 Concept about embankment : : _ 1.2 Research on dike structure in the world and in Vietnam, 7 1.1 Researches of sea-dike in the world.2 Researches of sea-dike in Vietnam 10 1. Basic types of dike cross sections, structures and materials to form sea dikes 13 1.4 Proposing of cross-section selection 16 1.1 The proposed research plans.2 The plan analysis 20 TM 1.5 Conclusion of chapter. „21 CHAPTER 2 MIKE 21 MODEL APPLICATION TO DETERMINE CALCULATED HYDROLOGICAL BOUNDARY OF NAM DINH VU ECONOMIC ZONE 22 2.1 Natural features of the Sty’ ared.1 Geography and terrain 2 3.2 Simulating the development of Nam Dinh Vu new economic Zone.1 Introduction about MIKE 21 model 2.24 Hydrodynamic simulation resils.3 The chapter conclusion CHAPTER 3 DESIGN AND STABILITY CALCUALATION OF DIKE STRUCTURE 45 3.1 Selection of design boundary condiions.1 Geological and terrain condition related to design 45 3.2 Design of dike cross section 49 3.2 Hydraulic stability of armour layers 37 3.1 The thickness of armour layer 37 3.2 Structure stability calculation of box concrete 0 3.3 The structural ve on the berm and toe dike (erosion holes) 3⁄4 The stability of armour layer with ABAQUS software 0 3.1 Introduction about ABAQUS software 20 34.2 The model and structure analysis.5 The chapter conclusion 79 CONCLUSION AND RECOMMENDATIONS: 80 1. LIST OF FIGURES Fig 1.1 Cat Hai - Haiphong zone is protected by sea-dike 5 Fig 1.2 A picture showing the formation of a dike using clay slurry filled geotextile .8 Fig L3 Mlustration of the prefabricated caisson supported by a rubble mound and source protection cover.4 Installation of upper cylinders to form breakwater 9 Fig 1.5 Homogenous dredged material dike with geosynthetic drainage composite.6 Sensor data from seepage test in crass.7 Maximum velocity at the sea edge of the crest dike depends on overtopping volumes of a wave; with the cases Hs =1,5m; Tp 6s; tana=0,25.
in Fig 8 Wave overtopping simulator is tested at Tien Hai — Thai Bình dike " Fig L9 Prefabricated structure protects rivers and sea dike n Fig 1.10 Prefabricated structures protect river and sea dike 2 Fig 1.11 The section shapes of the sea-dike “ Fig 1.12 Rock on seaside slope, sheet piles under embankment.13 The gentle slope, protection of the roof with two layers of stone, the use of ‘geotextile on ground.14 Steep slope, using hollow box to reduce load 1 Fig 2.1 Haiphong coastal estuary and Bach Dang estuary 2 Fig 2.2 Domain topography of zone.3 Computed gird, 31 Fig 2.4 Compared results between actual and computed flow velocities 33 Fig 2.5 The water level line between observed water level and computed water level at Hon Dau station 03/2009 34 Fig 2.6 The flow field in Haiphong estuary mouth among the high tidal phase - in the dry season 37 VỊ Fig 2.7 The flow field in Hai Phong estuary among the low tidal phase ~ in dry season 37 Fig 2.8 The flow field in Haiphong estuary among the high tidal phase - in the rainy season, 38 Fig 2.9 The flow field in Haiphong estuary among the low tidal phase — in dry season 38 Fig 2.10 The velocity process line in the study area 39 Fig 2.11 The flow direction inthe study area 40 Fig 2.12 The maximum velocity inthe dry season “ Fig 213 The maximum velocity inthe rainy season 2 Fig 2.14 The wave height of South with 26 frequency design 4 Fig 2.15 The wave height of Est with 26 frequency design 43 Fig 3.1 Synthesis frequency line in Dong Hai, An Hai, Haiphong city at No.2 Tie structure with drainage holes 5 Fig 3.3 Precast concrete constructions Busadco Productions 55 Fig 3.4 Typical cross-section of dike 5 Fig 3.5 The calculation chart of friction force to hold structure (toe dike) 62 Fig 3.6 The relationship between velocity and bulk material load protecting the toe ‘embankment.7 The largest erosion depths in the breakwater has a protective layer (Summer and Fredso, 2001) oo Fig 3.8 The model of 7 block has 5.0m height in ABAQUS m Fig 39 The loading chart works on the conjugate embankment according to the formula of Takahashi and Hosoyamada.10 The calculated loading due to wave action on embankment 7 Fig 3.11 The boundary condition and the loading n Fig 3.12 The stress distribution von Mises, MPa.13 The stress distribution von Mises, Mpa 74 Fig 3.14 The contact distribution among the face of block, MPa Fig 315 The stable settlement 2 Fig 3.16 The work load q = 2T/m? 16 Fig 3.17 The modeling meshing n Fig 3.18 The vertical displacement of the whole system n Fig 3.19 The vertical displacement of the whole system 1w Fig 3.20 The vertical displacement of the whole system 78 VII LIST OF TABLES ‘Table 1.1 The projects are arranged by the structure for Nam Dinh Vu dike 18 ‘Table 2.1 Frequency of wind velocity and annual directions at Hon Dau (1960 - 2011) lò) 24 ‘Table 2.2 Frequency of wave heights and directions at Hon Dau (1970 -2011) [8].1 Determining the chemical compositions of water 47 ‘Table 3.2 Safety standards coresponding tothe work level [7] 48 Table 3.3 The width ofthe dike crest according to the work level 49 ‘able 3.4 The results of wave height calculation to protect sea-dike [7Ì si Table 3.5 The selected options 56 ‘Table 3.6 The stability coefficient of embankment. 39 Table 37 Friction coefficient ft 6 able 3.8 The outer trietionforee ofeonerete box (FI) 64 Table 3.9 Frietion force ealeulation (F4) 64 Table 3.10 The fiietion force ofthe pile, one box has two piles (0.3m pile area and im depth) 6 ‘Table 3.11 The ficion force with 02*0.2m pile area and 8m depth 6 ‘Table 3.12 The calculated result for 3.3m depth foot plug of the box site 66 Table 3.13 A stone mass to protect toe embankment following Vax o Table 3.14 The stable settlement 76 INTRODUCTION 1, The necessity of study Vietnam has a coastline of about 3,260 km; the protection and exploitation of marine economic potential are always associa od with the existence and development of the country. At the same time, the implementation of the above objectives is the development of more and more quantity the greater the seale and rich diversity of functions for marine structures. Among their works such as: coastal protection structures, storms of shelter-works, harbors, breakwaters, works of protected island, harbors and airports on distant islands.
have been studied and built in the world and Vietnam, Now, due to the demand for construction of seaports, storm of shelters as well as shoreline of protected requirement, the construction of sea dikes is receiving and developing, However, due to the particularity of underwater construction, especially in seawater conditions, the challenges are given to select a protected structure of dike which can be affected of waves, winds, current, anti-slip, anti- structure, landslides, erosion and anti-tide of the marine environment, low investment cost, reducing volume of construction, high project life is a top priority for designers and constructors of marine. Therefore, the content of the topic: “Designing Structures 4o Protect Embankment at New Economie Zone of Nam Dinh Vu ~ Haiphong” is being invested to develop maritime economy. This project is one of the necessary issues today to become a key economic zone, multi-sectors with mainly field to develop maritime economy. Study objectives Dinh Vu - Haiphong economic zone is place where it is exploited about the maximum, advantage of natural conditions, geographic location, socio-economic potentiality.
According to the master plan approved by the Prime Minister with the heart of Haiphong international gateway harbor, it is determined to attract investments and receive advanced technology and to create a new driving force for Haiphong and North Coast accelerated development. “The Government has directed the construction and development of Dinh Vu - Cat Hai ‘economic zone into an integrated economic zone, a marine economic center, multi- sectors, including maritime economy (Which a major is serviced development of harbor), industry, finance, banking, tourism and trade center of the region and the whole country. Dinh Vu — Cat Hai economi zone is built and developed by evelopment planning of Haiphong city and the Northern major economic zone and ‘wo economic corridors: Con Minh (Lao Cai - Lao Cai)- Hanoi - Haiphong - (Quangninh; Namninh (China) - Lang Son - Hanoi - Haiphong - Quangninh; which create closed links with Van Don - Quangninh economic zone. In the immediate future, Dinh Vu - Cat Hai economic zone will focus on developing high-quality resorts (Cat Ba cco-tourist resort, Nam Trang Cat tourist resort, green paks — entertainment.), a modem seaport system with a total natural land area of 1,046ha (Tan Dinh Vu, Nam Dinh Vu, and Cat Hai harbor, International harbor Gate of Haiphong, .) tariff zone 12,532ha, non-tariff area 1,258ha, ueasure system about 209ha, industrial parks with total natural land area 550ha (319haindustrial zone of Ben Rung 698 ha, industrial zone of VSIP , industrial zone of Trang Cat 138ha, industrial zone of Nam Dinh Vu 681ha, industrial zone of Cat Hai and Lach Huyen istrict 4444ha, Trang Duc industrial park 400ha, public service centers 761ha, specialized centers 2.105ha, urban areas and urban population 2.062ha, land of national defense ~ security 103 ha.
In the sea-oriented strategy of Viemam's economy, Dinh Vu Economic Zone was invested to become a modern deep water economic zone in the North. This economic zone serves as a trading gateway for the whole of the North. The information and evelopment of economic zone have marked a development of Viet Nam maritime ‘economic zone.