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The New Hampshire High Tunnel Story
The New Hampshire High Tunnel Story NATURAL RESOURCES CONSERVATION SERVICE New Hampshire January 2011 BACKGROUND National High Tunnel Conservation Benefits Local Foods Initiatives 3-Year Pilot Program High tunnels can provide a number of Growing food locally, especially before significant conservation benefits such as and after the traditional growing season, NRCS offered seasonal high tunnels an increase in plant and soil quality, a helps strengthen the local economy and (officially called “seasonal high tunnel decrease in pesticide use and foliar (leaf) helps ensure the viability and profitability system for crops”) as a conservation disease, and improved energy savings. of small farms. When NH farms succeed, practice for the first time in fiscal year Many farmers who want to grow toma- valuable farmland and cultural heritage are (FY) 2010 as part of a three-year trial to toes without using pesticides often find protected. High tunnels are important tools determine their effectiveness in con- they can only do so successfully if they for enhancing the availability of local food serving water, improving soil health, are grown in a tunnel. Without rainfall, year-round. foliar disease is often reduced because the leaves stay dry. Insects that are com- “As expected, the seasonal high monly a problem in the field may not be “It is phenomenal that winter tunnel pilot has been popular in so in the tunnel because the tunnel tends farmer’s markets in NH have grown New Hampshire. In just one to disrupt their feeding patterns. Other from none four years ago to twenty year, the NRCS-NH helped fund insects that occur in a high tunnel are today. -
Marmaray Project - Turkey
MARMARAY PROJECT - TURKEY Istanbul is a city where historical and cultural values must be preserved and at the same time modern railway facilities have to be installed to decrease the environmental impact of public transportation and increase the capacity, reliability and comfort of the railway systems. The Project provides an upgrading of the commuter rail system in Istanbul, connecting Halkalı on the European side to the Asian side with an uninterrupted, modern, high-capacity commuter rail system. Railway tracks in both sides of Istanbul Strait will be connected to each other through a railway tunnel connection under the Istanbul Strait. The line goes underground at Yedikule, continues through the Yenikapı and Sirkeci new underground stations, passes under the Istanbul Strait, connects to the Üsküdar new underground station and emerges at Sögütlüçesme. The entire upgraded and new railway system will be approximately 76 km long. The main structures and systems; include the immersed tube tunnel, bored tunnels, cut-and-cover tunnels, at - grade structures, three new underground stations, 37 surface stations (renovation and upgrading), operations control centre, yards, workshops, maintenance facilities, upgrading of existing tracks including a new third track on ground, completely new electrical and mechanical systems and procurement of modern railway vehicles. The idea of a railway tunnel under the Istanbul Strait was first raised in 1860. However, where the tunnel under the Istanbul Strait crosses the deepest parts of the Strait, the old-fashioned techniques would not allow the tunnel to be on or under the seabed, and therefore the design indicated a "floating" type of tunnel placed on pillars constructed on the seabed. -
FACT SHEET: BART Silicon Valley
Twin-Bore Single-Bore Running Tunnel Running Tunnel Utilities Utilities Up to ~60' FACT SHEET: VTA’s BART Silicon Valley Phase II Extension Project FACTTunneling MethodologySHEET: BART Silicon Valley VTA’sVTA’s BART BART Silicon Silicon Valley Phase Valley II Project Phase is a six-mile, ll Extension four-stationUp extensionProject to ~75' that will bring BART train service from Berryessa/North San José through downtown San José to the City of Santa Clara. The Phase II Project will include an approximately five-mile tunnel, two mid-tunnel ventilation facilities, a maintenance facility and storage yard, three VTA’sunderground BART Siliconstations (AlumValley Rock/28th Program Street, Overview Downtown San José, Diridon), and one ground-level station (Santa VTAClara). is extending The subway the tunnelBART regionalwill be in heavy one large rail system diameter to Milpitas,tunnel. San Jose, and Santa Clara. The 16-mile extension, called the BART Silicon Valley Program, will extend the BART system south of BART’s future Warm Springs/SouthSingle-Bore Fremont Tunnel Station in Fremont to Milpitas, San Jose, and Santa Clara. When completed, this fully grade-separatedThe tunnel will be project constructed is planned as a tosingle, include large six diameter stations andtunnel. a new The maintenance and storage facility in Santa Clara.approximately VTA’s BART 45 footSilicon tunnel Valley will Program contain istwo being independent delivered trackways,in two phases. one Thefor Berryessa Extension Project (Phaseeach direction I) is under of constructiontravel. Passenger and scheduled platforms willto open be located in 2018, within with thestations tunnel, in Milpitas and the Berryessa areaconnected of San toJose. -
Geotechnical Performance of a Tunnel in Soft Ground
Missouri University of Science and Technology Scholars' Mine International Conference on Case Histories in (1993) - Third International Conference on Case Geotechnical Engineering Histories in Geotechnical Engineering 03 Jun 1993, 10:30 am - 12:30 pm Geotechnical Performance of a Tunnel in Soft Ground A. B. Parreira Universidade de São Paulo, Brazil R. F. Azevedo Pontifícia Universidade Católica do Rio de Janeiro, Brazil Follow this and additional works at: https://scholarsmine.mst.edu/icchge Part of the Geotechnical Engineering Commons Recommended Citation Parreira, A. B. and Azevedo, R. F., "Geotechnical Performance of a Tunnel in Soft Ground" (1993). International Conference on Case Histories in Geotechnical Engineering. 17. https://scholarsmine.mst.edu/icchge/3icchge/3icchge-session05/17 This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License. This Article - Conference proceedings is brought to you for free and open access by Scholars' Mine. It has been accepted for inclusion in International Conference on Case Histories in Geotechnical Engineering by an authorized administrator of Scholars' Mine. This work is protected by U. S. Copyright Law. Unauthorized use including reproduction for redistribution requires the permission of the copyright holder. For more information, please contact [email protected]. !111!!111 Proceedings: Third International Conference on Case Histories in Geotechnical Engineering, St. Louis, Missouri, ~ June 1-4, 1993, Paper No. 5.55 Geotechnical Performance of a Tunnel in Soft Ground A. B. Parreira R.F.Azevedo Assistant Professor, Universidade de Sio Paulo, Brazil Associate Professor, Pontificia Universidade Cat61ica do Rio de Janeiro, Brazil SYNOPSIS The analysis of a tunnel section excavated through soft ground is presented. -
TBM FACT Sheet (Lgrev).Pub
Chesapeake Bay Bridge-Tunnel Parallel Thimble Shoal Tunnel Project For more contest information, visit www.cbbt.com/TBMNamingContest/ For more project information, visit www.cbbt.com/parallelthimbleshoaltunnel/ Tunnel Boring Machine To Cape Charles, VA PROJECT DESCRIPTION The Chesapeake Bay Bridge-Tunnel is a 17.6 mile bridge and tunnel complex that spans the lower Chesapeake Bay and connects Virginia’s Eastern Shore with the mainland in Virginia #2 Island Proposed Beach. The Parallel Thimble Shoal Tunnel project will involve the construction of a two-lane bored tunnel from the CBBT’s southernmost island (#1 Island) under Thimble Shoal Channel to #2 Island. This will be the FIRST bored roadway tunnel in the Hampton Roads region as well as the Commonwealth. Not only did this bored tunnel solution offer a less expensive Parallel Existing Thimble Thimble Shoal Shoal Tunnel price tag, but it will have less environmental impact than the traditional immersed tube tunnel construction and will have less impact on the ship traffic that sails Thimble Shoal Channel. Tunnel When complete, this tunnel, which runs parallel to the existing tunnel, will carry southbound traffic headed towards Virginia’s mainland. CONTRACTOR: Chesapeake Tunnel Joint Venture COST: $755,987,318 Hydraulic Rams What is a Tunnel Boring Machine (TBM)? Rotating Arm A TBM is a machine used to excavate tunnels. This machine operates #1 Island like a giant drill, but one that builds as it drills. Here’s how it works: The large rotating cutter head scrapes away soil under the bay bottom. The soil is removed from the machine via a large conveyor system and hauled away. -
A. Minutes from the November 19, 2020 HRTPO Board Meeting
ITEM #7: APPROVAL OF CONSENT ITEMS [Action Requested] A. Minutes from the November 19, 2020 HRTPO Board Meeting Minutes from the November 19, 2020 HRTPO Board meeting are attached. Attachment 7-A RECOMMENDED ACTION: Approve the minutes. B. HRTPO Financial Statement The Statement of Revenues and Expenditures for the activities of November 2020 is attached. This statement reflects the financial status of the HRTPO as a whole. Attachment 7-B RECOMMENDED ACTION: Accept the HRTPO Financial Statement. HRTPO Board Meeting │ January 21, 2021│ Agenda Hampton Roads Transportation Planning Organization Board Summary Minutes of November 19, 2020 Pursuant to the declared state of emergency in the Commonwealth of Virginia in response to the COVID-19 pandemic and to protect the public health and safety of the Board members, staff, and the general public, the HRTPO Board Meeting was held electronically via Zoom with the following in attendance: HRTPO Voting Members in Attendance: Donnie Tuck, Chair (HA) Douglas Pons (WM) Rick West, Vice-Chair (CH) Thomas Shepperd (YK) Frank Rabil (FR) Delegate Stephen Heretick (GA)* Phillip Bazzani (GL) Delegate Jeion Ward (GA) Michael Hipple (JC) William Harrell (HRT) David Jenkins (NN Alternate) Zach Trogdon (WATA) Kenneth Alexander (NO)* Christopher Hall (VDOT) Herbert Green (PQ Alternate) Jennifer DeBruhl (DRPT Alternate)* John Rowe, Jr. (PO) Cathie Vick (VPA Alternate)* Robert Dyer (VB) HRTPO Nonvoting Members in Attendance: Christopher Price (CH) J. Randall Wheeler (PQ)* Amanda Jarratt (FR) Michael Johnson (SH) J. Brent Fedors (GL) Albert Moor (SU) Mary Bunting (HA) Patrick Duhaney (VB)* Randy Keaton (IW) Andrew Trivette (WM)* Scott Stevens (JC)* Neil Morgan (YK) Cynthia Rohlf (NN) Terry Danaher (CAC) Larry “Chip” Filer (NO)* Jenifer Spratley (PAA) HRTPO Executive Director: Robert A. -
Wet Well Wonder in a Deep Sewer Tunnel
Columbus, OH Case Story Wet Well Wonder in a Deep Sewer Tunnel This wet well is a critical piece of a system designed to intercept wet weather overflows, and it demands powerful, high-quality pumps to handle the load. Designed to reduce environmental impacts resulting from Combined Sewer Overflows (CSOs) in Columbus, Ohio, the Olentangy-Scioto- Interceptor-Sewer Augmentation Relief Sewer (OARS) is the key component in meeting this goal. This sewer tunnel will intercept wet weather overflows that currently empty into the Scioto River and instead carry the flows to the city’s Jackson Pike and Southerly wastewater treatment plants. The overall length of the OARS tunnel is just less than four and a half miles, and it includes three relief structures that divert wet weather combined sewer flow to the OARS tunnel. The OARS tunnel is sized to provide adequate conveyance capacity through 2047 for all storms contained within the typical year as defined by the city. The OARS tunnel ends at the OARS Diversion Structure just north of the Jackson Pike wastewater treatment plant, which serves as the pump station wet well. Scope Among the most interesting components of the OARS project is a 215-foot Flygt model CP3351/995 FM 800 HP 4160V, 10417 gpm deep, 60-mgd capacity pumping system and a 185-foot deep screening at192’ tdh system. The OARS pumping system consists of multiple pumps that can handle enough flow to dewater the tunnel within two days of a large flow event. The difficulty with the deep pumping system on this project is that the static head condition varies from as much as 210 feet when the tunnel is empty to as little as 15 feet when the tunnel and shafts are full. -
Civil Engineering
Civil Engineering Volume 170 Issue CE2 May 2017 ■ Stabilising Lyme Regis – a strategic approach ■ Planning and procuring the Shatin–Central cross-harbour rail tunnel, Hong Kong ■ Innovative uses of thermal imaging in civil engineering ■ Sustainable post-earthquake reconstruction in Pakistan www.civilengineering-ice.com ISSN 0965 089 X Call for Papers Cities of the future Proceedings of the Institution of Civil Engineers Civil Engineering SPECIAL ISSUE Editors: Philippe Bouillard, Université Libre de Bruxelles, Brussels, Belgium and Priti Parikh, University College London, London, UK Civil Engineering is planning a special issue for Why publish with ICE? 2018 on cities of the future. Access to ICE membership – ICE Publishing, as the publishing arm of ICE, is the only publisher The 21st century has seen a rapid increase in population with over 50% of the that brings you direct access to ICE’s worldwide world’s population living in cities. According to report from the Organisation membership of 80 000. for Economic Co-operation and Development, the urban population will Visibility – we also have thousands of readers increase from less than 1 billion in 1950 to roughly 6 billion by 2050 to who are not members of ICE, from corporations, around 9 billion people by end of this century. Rapid urbanisation has brought to governments, to universities. Our journals in pressures and challenges for the built environment, infrastructure and are included in major engineering indexes and resource allocation in cities. There is a need to rethink engineering design and resources. strategies for future cities. This can be achieved by going beyond the physical appearance and by Quality – our journals’ reputation for quality focusing on different representations, properties and impact factors of the is unsurpassed, ensuring that the originality, urban system. -
I-64/Hampton Roads Bridge-Tunnel (HRBT) – Project Update
Hampton Roads Bridge Tunnel Expansion: Project Development Update May 17, 2018 James S. Utterback HRBT Project Director Virginia Department of Transportation 5/17/2018 Ten Hampton Roads Tunnels Chesapeake Channel Tunnel (1964) Hampton Roads Bridge-Tunnel (1957 & 1976) Thimble Shoal Tunnel (1964) Monitor-Merrimac Memorial Bridge- Tunnel (1992) Midtown Tunnel Downtown (1962 & 2016) Tunnel (1952 & 1987) 5/17/2018 3 • • • 5/17/2018 1950 Future tunnel #11 at Thimble Shoal will be bored tunnel Thimble Shoal will Future tunnel#11at 1 tunnel is concrete-box immersed tube 9 tunnels immersed tubes are steel-shell Downtown Tunnel #1 1955 Hampton Roads #1 1960 Midtown Tunnel #1 1965 Thimble Shoal #1 & Chesapeake #1 1970 of Tunneling 65 Years in Hampton Roads 1975 Hampton Roads #2 1980 1985 Downtown Tunnel #2 1990 Monitor-Merrimac 1995 2000 2005 2010 1976 2015 Midtown Tunnel #2 4 2020 HRBT Expansion - Scope of Work . Between Settlers Landing in Hampton and I-564 in Norfolk . Improvements in I- 64 including the construction of a new 4 lane HRBT tunnel . New 4 lane HRBT tunnel will serve Eastbound traffic . 2 existing HRBT tunnels will serve Westbound traffic Proposed Tunnel Alignment (Hampton Side) 6 5/17/2018 Proposed Tunnel Alignment (Norfolk Side) 5/17/2018 7 Proposed Lane Configuration for Tunnel and Approach Bridges 2+1+1 concept in each direction: • 2 free General Purpose lanes • 1 full-time HOT lane • 1 peak-hour HOT lane on left shoulder 5/17/2018 8 Tunnel Considerations Landside work has risks but is largely conventional Tunnel work is less -
Planting in a High Tunnel Department of Natural Resources Conservation Service Agriculture
United States Planting in a High Tunnel Department of Natural Resources Conservation Service Agriculture What is a Seasonal High Tunnel System? Alaska Crops A high tunnel (Seasonal Tunnel System for Crops) is a In Alaska four crops immediately come to mind as polyethylene (plastic) covered structure that allows benefitting from extended seasons, warmer growers to increase production of certain crops, grow temperatures and high market return. These are some crops that could not otherwise be grown in their tomatoes, cucumbers, corn, and peppers. They are area, and extend the length of time in the year (growing currently the most popular, as well as profitable, crops season) that the crops may be grown. for high tunnel production. Of course, this does not rule out other plants, nor does it rule out starting earlier in High tunnels often look similar to greenhouses, but are the season with cooler tolerant plants (i.e. quick maturing usually only single walled and are typically not baby greens), harvesting them and planting a second temperature controlled. The plastic covering traps crop that matures later in the season. High tunnel sunlight to raise temperatures inside the structure for the efficiency is increased by getting two or more crops a plants growing inside. The growing season can be growing season. This strategy also works if you have extended by up to four weeks by protecting crops from some plants that are incompatible because one plant potentially damaging weather conditions. Crops grown shades another. You can however, overcome shading by inside high tunnels tend to be of higher quality and spacing and/or by where you physically locate plants produce higher yields. -
Stability Charts for a Tall Tunnel in Undrained Clay
Int. J. of GEOMATE, April, 2016, Vol. 10, No. 2 (Sl. No. 20), pp. 1764-1769 Geotech., Const. Mat. and Env., ISSN: 2186-2982(P), 2186-2990(O), Japan STABILITY CHARTS FOR A TALL TUNNEL IN UNDRAINED CLAY Jim Shiau1, Mathew Sams1 and Jing Chen1 1School of Civil Engineering and Surveying, University of Southern Queensland, Australia ABSTRACT The stability of a plane strain tall rectangular tunnel in undrained clay is investigated in this paper using shear strength reduction technique. The finite difference program FLAC is used to determine the factor of safety for unsupported tall rectangular tunnels. Numerical results are compared with upper and lower bound limit solutions, and the comparison finds a very good agreement with solutions to be within 5% difference. Design charts for tall rectangular tunnels are then presented for a wide range of practical scenarios using dimensionless ratios ~ a similar approach to Taylor’s slope stability chart. A number of typical examples are presented to illustrate the potential usefulness for practicing engineers. Keywords: Stability Analysis, Tall Tunnel, Undrained Clay, Factor of Safety, FLAC, Strength Reduction Method INTRODUCTION C/D and the strength ratio Su/γD. This approach is very similar to the widely used Taylor’s design chart The critical geotechnical aspects for tunnel design for slope stability analysis (Taylor, 1937) [9]. discussed by Peck (1969) in [1] are: stability during construction, ground movements, and the determination of structural forces for the lining design. The focus of this paper is on the design consideration of tunnel stability that was expressed by a stability number initially defined by Broms and Bennermark (1967) [2] in equation 1: = (1) − + Fig. -
The Effect of Wave Passage on Immersed Tube Tunnels - Busan Geoje Fixed Link in South Korea
IABSE SYMPOSIUM WEIMAR 2007 The effect of wave passage on immersed tube tunnels - Busan Geoje Fixed Link in South Korea Ronald HEIJMANS Peter JACKSON Dr. Thomas KASPER Civil Engineer Geotechnical Engineer Civil Engineer ARCADIS Infra, Cowi Cowi Amersfoort, The Netherlands Copenhagen, Denmark Copenhagen, Denmark [email protected] [email protected] [email protected] Guido MEINHARDT Jean SCHMITT Dr. Hessel VOORTMAN Geotechnical Engineer Project Engineer-in-charge Hydraulic Engineer ARCADIS Infra Ingerop ARCADIS Infra, Amersfoort, The Netherlands Paris, France Amersfoort, The Netherlands [email protected] [email protected] [email protected] Summary A special feature of the Busan-Geoje Fixed Link in South Korea is the foundation of an immersed tube tunnel in a trench of soft marine clay. The tunnel is subject to wave loads due to 9.2 meter high hurricane waves which jeopardize the stability of the tunnel. Analytical analyses, scale model tests and numerical analyses have been made to investigate this problem. This paper gives an overview of the analyses, performed from schematization of the non-linear waves to pressure variations at seabed, modelling of the wave induced groundwater flow and its effects on the tunnel buried in the seabed. This is followed by a discussion of the results and consequences for the design of the tunnel. Keywords: immersed tube tunnel; wave effect; numerical modelling, non-linear waves 1. Introduction 1.1 Introduction of the project The Busan Geoje Fixed Link consists of an 8.2 km long motorway with two large cable stayed bridges and a 3.3 km long immersed tube tunnel as main structures.