Feasibility of Underground Short-Haul Freight PipelinesApplication to the DFW Airport

Transcription

1 Feasibility of Underground Short-Haul Freight PipelinesApplication to the DFW Airport Department of Civil Engineering The University of Texas at Arlington Principal Investigators Sia Ardekani, PhD, PE Mohsen Shahandashti, PhD, PE Graduate Research Assistants: Ms. Ferika Farooghi, PhD Candidate in Construction Mr. Sirwan Shahooei, PhD Candidate in Transportation Mr. Ehsan Zahed, PhD Candidate in Construction

2 Table of Content 1. Chapter One INTRODUCTION AND SCOPE 2. Chapter two DESIGN AND CONFIGURATION 3. Chapter three OPERATIONAL ATTRIBUTES 4. Chapter Four CONSTRUCTION METHODS AND COST ANALYSIS 5. Chapter Five CONCLUSIONS AND RECOMMENDATIONS Identifying Terminal Points Freight Sizes and Dimensions Design of Tunnel and Vehicles Terminal Design Running Gear Systems Headway Speed Capacity Terminal Operations Geological and Geotechnical Study Construction of Tunnels Construction of shafts and entry/exit ramps Construction of Terminals Cost Analysis 2/17

3 Chapter One: INTRODUCTION AND SCOPE Advantages of the System Reduce the truck traffic The proposed UFT line: Transports standard air crates One end of the line is the airport Delta/United cargo terminal The other end is a warehouse off the secured airport area Improve safety Enhance Efficiency Improve Air quality Help Private shippers (FedEx, UPS, U.S. postal service ) Reduce adverse environmental impacts such as emissions and noise 3/17

4 Chapter Two: Identifying Terminal Points Selection Criteria Close to the major highways Consistent land use with surrounding (industrial) 4/17

5 Chapter Two: Identifying Terminal Points Suggested Locations According to the DFW Masterplan: Northwest Logistic International Commerce Park Proposed Intermodal Freight Terminal Congested surrounding highways (121,114) Longer UFT line lengths Interrupting taxiways during construction Close to the TX-161 highway Located in Industrial zone located in airport area UFT line length of 8,100 ft 5/17

6 Chapter Two: Freight Size and Dimensions Type: International Air Transport Association (IATA) A-2 crate Suitable for: B747, B747F, DC8, DC10, A300/F Size: 125 inches long, 88 inches wide, 79 inches high (317 cm 223 cm 200cm) Maximum gross weight: lbs. (6.033 kg) Internal Volume: 445 ft 3 (12.6 m 3 ) 6/17

7 Chapter Two: Design of Tunnel and Vehicles Tunnel section: Cylindrical Tunnel depth: 40 ft. Propulsion system: Linear Induction Motors (LIMs) Crate dimension: (7.8 W 7.5 H 14.3 L) Vehicle type: Open flat-bed with a rectangular cross-section 7/17

8 Chapter Two: Design of Tunnel and Vehicles 8/17

9 Chapter Two: Design of Terminal Schematic design 1- Two similar sections Loading Unloading 2- Terminal has two lines: a truck line and an access line 3- The total area of the terminal without access roads is 21,700 sq. ft 4- Managerial Building 1,800 sq. ft 5- Storage capacity of 70 crates 6- Two layover/maintenance rails 7- Two truck stations Loading Unloading 8-8-inch thick concrete pavement 9- Four forklifts + One back-up forklift 9/17

10 Chapter Three: OPERATIONAL ATTRIBUTES Operational Attributes Running Gear Systems Steel wheel and rail Speed 51 mph Headway Six minutes Terminal dwelling time One minute Trip time Two minutes Capacity 240 crates per direction per day Number of forklifts Four Operating + One Backup in each terminal 10/17

11 Chapter Four: CONSTRUCTION METHODS AND COST ANALYSIS Construction Methods and Cost Analysis GEOLOGICAL AND GEOTECHNICAL STUDY CONSTRUCTION OF TUNNELS CONSTRUCTION OF SHAFTS AND ENTRY/EXIT RAMPS CONSTRUCTION OF TERMINALS COST ANALYSIS 11/17

12 Chapter Four: GEOLOGICAL AND GEOTECHNICAL STUDY Construction Methods and Cost Analysis Sources for geological and geotechnical studies: Geological Atlas of Texas (USGS 2017) GEOLOGICAL AND GEOTECHNICAL STUDY Two previous DFW Airport projects: - Express North (W1) Parking Expansion - DFW DPS Headquarters 2900 E Street CONSTRUCTION OF TUNNELS CONSTRUCTION OF SHAFTS AND ENTRY/EXIT RAMPS CONSTRUCTION OF TERMINALS Different soil layers: - Top soil - Stiff Lean Clay (CL) - Stiff to very stiff Fat Clay (CH) - Gray hard Shale (Shaley Clay) COST ANALYSIS Groundwater level fluctuation 14 to 40 ft. below the surface Need for dewatering 12/17

13 Chapter Four: CONSTRUCTION OF TUNNELS Construction Methods and Cost Analysis GEOLOGICAL AND GEOTECHNICAL STUDY CONSTRUCTION OF TUNNELS Tunneling: Tunnel Boring Machine (TBM) Reinforced precast concrete segments 20% slope ramp 13-ft. diameter access shaft (3,500 ft. from the UFT origin terminal ) 75 ft. of the tunnel entry/exit ramps (cut-and-cover method) CONSTRUCTION OF SHAFTS AND ENTRY/EXIT RAMPS CONSTRUCTION OF TERMINALS COST ANALYSIS Disposal of Tunnel Spoils: Continuous Belt Conveyor System 13/17

14 Chapter Four: CONSTRUCTION OF SHAFTS AND ENTRY/EXIT RAMPS Construction Methods and Cost Analysis Supporting Shaft and Tunnel Entry/Exit Ramp Walls: GEOLOGICAL AND GEOTECHNICAL STUDY CONSTRUCTION OF TUNNELS Soldier Pile and Lagging Method fast-to-construct cost effective CONSTRUCTION OF SHAFTS AND ENTRY/EXIT RAMPS CONSTRUCTION OF TERMINALS COST ANALYSIS Dewatering For Construction of Access Shaft and Tunnel Entry/Exit Ramps: Pumping Method The main purpose: Facilitate installation of the support systems. Improve soil stability allowing excavation to proceed in dry conditions. 14/17

15 Chapter Four: CONSTRUCTION OF TERMINALS Construction Methods and Cost Analysis GEOLOGICAL AND GEOTECHNICAL STUDY 16,200 square feet of pavement for the access and stacking areas 8-inch thick reinforced concrete slabs 1,800 square feet office building (one-story timber office buildings) including office space, storage, operation rooms, and restrooms CONSTRUCTION OF TUNNELS CONSTRUCTION OF SHAFTS AND ENTRY/EXIT RAMPS CONSTRUCTION OF TERMINALS COST ANALYSIS 15/17

16 Chapter Four: COST ANALYSIS Construction Methods and Cost Analysis GEOLOGICAL AND GEOTECHNICAL STUDY CONSTRUCTION OF TUNNELS CONSTRUCTION OF SHAFTS AND ENTRY/EXIT RAMPS CONSTRUCTION OF TERMINALS COST ANALYSIS Capital Costs of The UFT (2016 dollars) Cost Components Costs ($) Tunnel Construction 28,730,700 Tunnel Entry/Exit Ramp 460,760 Tunnel Invert Concrete 944,557 Terminal Development 1,020,600 Tracks 1,576,903 Freight Vehicles 84,000 LIM System 125,000 Forklifts 900,000 Total 33,842,520 Annual Costs of The UFT (2016 dollars) Cost Components Costs ($/year) Tunnel Operation and 1,500,000 Maintenance Terminal Maintenance 11,000 LIM Maintenance 6,250 LIM Power Consumption 17,175 Terminal Electricity Consumption 28,800 Forklifts Electricity Consumption 66,000 Administrative Cost 2,913,400 Total 4,542,625 16/17

17 Questions 17/17

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