Underwater Inspection and Repair of Bridge Substructures
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6. Annular Space & Sealing
6. Annular Space & Sealing (this page left intentionally blank) 6. Annular Space & Sealing Chapter Table of Contents Chapter Table of Contents Chapter Description ......................................................................................................................................................................................... 6 Regulatory Requirements – Annular Space & Sealing of a New Well ..................................................................................................... 6 Relevant Sections – The Wells Regulation.............................................................................................................................................. 6 The Requirements – Plainly Stated .......................................................................................................................................................... 6 Well Record – Relevant Sections............................................................................................................................................................14 Best Management Practice – Report use of Centralizers .......................................................................................................... 15 Key Concepts ..................................................................................................................................................................................................16 The Annular Space ...................................................................................................................................................................................16 -
It's Not the Most Glamorous Job in the World, and It's Not the Highest Profile
Tidal Thames.qxd 9/24/07 2:22 PM Page 8 n the bottom Thames Estuary. As commercial diving a falling tide, but leave them the diver, a stand-by diver and a Kevin said: “She gives us a large of the He rarely knows what goes, the PLA team doesn’t vulnerable on rising tides. So tender or dive assistant. deck area to work on and her speed’s Thames, the day will hold or, once go deep - typically around everything we do has to be timed They can dive from any vessel; very important. In an emergency we Mick he’s under the water, what eight to 20 metres. But poor precisely, according to where in the but they prefer to use their own may only have a narrow tidal window Russell is will loom out of the visibility and shifting river we’re expected to work.” specially designed boat PLA Diver. It to work in, if we miss it, we could be blind. darkness - driftwood, currents in some of the The divers get their jobs from was built in 1992 by Searle Williams waiting up to 11 hours before the The water’s disturbed wartime busiest port waters in either the PLA’s Marine Services team, on a Blyth 33 hull. At 10 metres long conditions are right again - so it’s thick with silt and, just a explosives, the occasional Britain, makes the Thames a Vessel Traffic Services (VTS) officers, and with a displacement of seven vital we get on scene quickly.” few inches from where he’s corpse. -
Construction of Tremie Concrete Cutoff Wall, Wolf Creek Dam, Kentucky
c / y (y ¥ f t D n a a n in_r uir D 0!ID§Ii I <__ -j M IS C E L L A N E O U S PAPER SL-80-10 CONSTRUCTION OF TREMIE CONCRETE CUTOFF WALL, WOLF CREEK DAM, KENTUCKY by Terence C. Holland, Joseph R. Turner Structures Laboratory U. S. Army Engineer Waterways Experiment Station P. O. Box 631, Vicksburg, Miss. 39180 September 1980 Final Report Approved For Public Release; Distribution Unlimited Prepared for Office, Chief of Engineers, U. S. Army TA Washington, D. C. 20314 7 .W34m Under C W IS 3 I5 5 3 SL-80-10 1980 », Ar ' \ 8 ;v ;>"* % * OCT 2 7 1980 Water & : as Service Denver, Colorado Destroy this report when no longer needed. Do not return it to the originator. The findings in this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents. The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. SURÈAU OF RECLAMATrON DENVER u *W ff \& A /P 92059356 \y£ ,\s> , *c£p £ > b <0 Unclassified V * ie05*l35Ï.V SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) O' READ INSTRUCTIONS REPORT DOCUMENTATION PAGE BEFORE COMPLETING FORM 1. REPORT NUMBER 2. GOVT ACCESSION NO. 3. RECIPIENT'S CATALOG NUMBER Miscellaneous Paper SL-80-10 ' 4. T I T L E (and Subtitle) 5. TYPE OF REPORT & PERIOD COVERED V CONSTRUCTION OF TREMIE CONCRETE CUTOFF WALL, Final report WOLF CREEK DAM, KENTUCKY 6. -
Link to Line Card
DYNAMIC UNDERWATER CONSTRUCTION SERVICES “No Job Too Deep; No Task Too Daunting” Services Provided Marine Construction Support • underwater survey and video • pipeline jetting and profiling • underwater welding & burning • underwater rigging Ship Husbandry • commercial and recreational vessel • hull and propeller video inspection • cathodic protection testing • propeller obstruction removal Woman Owned, Small Business, Dams, Bridges & Docks Services Disabled • debris removal Veteran • underwater painting and coating Cert: DBE, WBE, WDVAVOB • NDT (non-destructive testing) • piling repairs Licenses (wood/steel/concrete) DUNS: 080222380 CAGE: 7LYT5 NAICS: 541990, 237990 Marine Salvage Gen. Contractor: DYNAMUC831N8 • salvage of ships, aircrafts, and motor vehicles • compartment and confined space E-mail or Call entry teams • hazmat services for FREE Quote • emergency response 253.328.4456 [email protected] Industrial Plants • trash rake cleaning and repair 10616 13th Ave. Ct S. • dredging and debris removal Tacoma, WA 98444 • traveling screen repair • video inspection, cleaning, and repair Complete online services list dynamicunderwaterconstruction.com DUCS Safety Policy Our employees are trained to know and execute DUCS extensive safety policy and approved procedures. We firmly believe in our employees right to “stop work” for safety. If work must be stopped, our employees will strive to mitigate the safety hazard in the most efficient means possible. Additionally we encourage our employees to be proactive with safety on the job site by having daily safety meeting where the days objectives are discussed to determine the safest and most expedite manner to complete said objective. Key Personnel Sherry McPherson, owner and President of DUCS, is a retired Iraq war combat veteran. She has a Bachelor Degree in Science majoring in Technology Management and has completed a year of graduate school working on a Master’s in Public Administration. -
Underwater Concrete in Drilled Shafts: the Key Issues and Case Histories
Underwater Concrete in Drilled Shafts: the Key Issues and Case Histories Sam X. Yao1 and Robert B. Bittner2 ABSTRACT: In construction of drilled shafts under water, placing concrete in the shafts is technically demanding and involves complex construction logistics. Past construction experience has demonstrated that high quality concrete can be placed in drilled shafts under water with a proper concrete mix and proper placement techniques. However, a significant number of failures have occurred which have resulted in excessive cost overruns and delays. These problems may have occurred because proper underwater concrete construction techniques have not been widely disseminated within the industry. This is a technical area where competent design and sound construction planning can achieve a significant reduction in both risk and cost. This paper will discuss some key technical issues in the concrete mix design, concrete production and placement for the drilled shaft construction. The paper also describes two lesson-learned case histories from drilled shaft construction projects. INTRODUCTION Placing concrete in the shafts is one of the most critical and complex operations that often determine success or failure of many drilled shaft construction projects. If the concrete is placed under water, the construction is even more technically demanding and involves complex construction logistics. A number of failures have occurred due to improper concrete mix or improper construction procedures. The following sections present some important technical issues that are frequently encountered in underwater construction of drilled shafts. CONCRETE MIX DESIGN Because concrete placed underwater is inherently susceptible to cement washout, laitance, segregation, cold joints, and water entrapment, it must possess some unique properties that are not otherwise required. -
Chapter 15 – Table of Contents
Bridge Maintenance Course Series Reference Manual Chapter 15 – Table of Contents Chapter 15 - Channel and Waterway ....................................................................................... 15-1 15.1 Identifying Scour and Erosion – Waterway Mechanics ..................................................... 15-1 15.2 Preventive and Basic Maintenance for Channels and Waterway ..................................... 15-5 15.2.1 Debris Removal ............................................................................................................... 15-5 15.2.2 Vegetation Removal ........................................................................................................ 15-8 15.3 Repair and Rehabilitation of Channel and Waterway ....................................................... 15-8 15.3.1 Placement of Riprap and Gabions ................................................................................ 15-11 15.2.2 Tremie Concrete ........................................................................................................... 15-19 15.2.3 Grout Bag Placement .................................................................................................... 15-20 15.2.4 Sheet Piling.................................................................................................................... 15-24 15.2.5 Articulated Block ........................................................................................................... 15-25 15.3 Chapter 15 Reference List ............................................................................................... -
69% APPROXIMATE VOLUMES for GROUT Drilled Loop Hole Inside Vol. Vol. Dia. Dia
THERIv1-EX GROUT™ PLUS is an engineered system for use as backfill material in earth-coupled heat pump systems. Its elevated thermal conductivity and low p'crmcability allow for excellent heat exchange while T protecting groundwater supplies. TI-IERM-EX GROUT " PLUS should be pumped using a positive displacement pump capable of generating pressures in excess of 300 psi. Developed using high swelling Wyoming Bentonite, this new generation of grouting material offers efficient installation of closed-loop geothermal heat pump systems. APPROXIMATE VOLUMES FOR GROUT Drilled Loop Anlr. Anlr. MATERIAL SPECIFICATIONS: Hole Inside Vol. Vol. Dia. Dia. (cu.ft.zft.) (gal. ft.) 1.13 Btulhr-ft-oF 1.2 Btu/hr-ft- of Thermal Conductivity: 4 % 0.08 0.57 6 x 10-8 6 x 10-8 I Permeability: 4.5 % O.IO 0.74 Solid Content: 69% 71 % 5 % 0.13 0.94 , Slurry Weight: 14.1 Ibs/gal 15.2Ibs/gal ! 5.5 % 0.15 1.15 Slurry Volume/Batch: 41 gals 41.5 gals 6 % 0.19 1.39 5 1 0.12 0.88 5.5 1 0.15 1.10 6 1 0.18 1.33 ~..~--~..-.--....---.-- c\PPLICATION R~TE: The combination of fresh water, THERM-EX GROUT~MPLUS and silica sand constitute "the system" for backfil1ing geothermal loops. Use locally available dry silica sand. For best results, use sand ranging in size from 30 mesh to 70 mesh CAFS GFN particle size classification 38 to 50). .._....... ·1 Mix as follows: 1.13 Btu/hr-ft- uF 1.2 Btu/hr-ft-"F ! Water 21 gal 22 gal I THERM-EX GROU(M PLUS 1 - 50 lb bag 1- 50 Ib bag 3501b 4001b Silica Sand .- IJ Add the THERM-EX GROUT™ PLUS to the water while agitating. -
Design and Construction of Marine Structures
Technical Fundamentals for Design and Construction October 6, 2018 Design and Construction of Marine Structures Key Points 1. Approximately 71 percent of the earth's surface is covered in water, and the oceans hold about 96 percent of all the earth's water. 2. Construction and further development in the marine environment is essentially our primary remaining frontier on earth. 3. There exists a real opportunity and need for innovation and new technologies that have the potential to improve the quality of marine structures effectively while reducing the cost, time, and risk of construction. 4. The marine environment offers significant opportunities that do not exist with on‐land construction. The most important of these is the ability to construct massive structures at an optimum location in a fully controlled environment with skilled labor and then transport an essentially complete structure great distances for installation in a severe marine environment. These structures include bridge foundations, tunnels, offshore platforms, gravity‐base structures, dams, airfields, breakwaters, surge barriers, and power stations harnessing energy from wave, wind, tides, and currents. It can be a truly exciting and satisfying adventure. Design for Construction of Marine Structures When designing a structure for the marine environment, it is essential to first envision the means, methods, and equipment needed to build the structure. This can be considered the initial construction engineering task of marine construction. This task includes design of systems to move extreme heavy loads vertically and horizontally both in and out of water, and design of systems to control and maintain buoyancy and stability during all in‐water construction phases including launch, transport, and immersion. -
Commercial Diving Physical Examination
Commercial Diving Physical Examination To the Applicant / Student: Attached are the forms and instructions for a commercial diving physical examination. One of the most important requirements for acceptance as a student in the Professional Certificate in Marine Technology at National University and to become a commercial diver is a thorough physical examination in accordance with Association of Diving Contractors International standards. As a commercial diver, it is a personal responsibility to always have a current physical exam. A current physical exam must have been completed within the last year and there must be no physical maladies which would preclude you from diving or making hyperbaric exposures. Although the commercial diving physical examination can be done by any licensed physician; it is always best to have the physical examination done by a physician who is trained in diving medicine or hyperbaric medicine. Attached is a list of physicians in Los Angeles and San Diego who are approved to conduct diving examinations. You must have the physical examination completed including the laboratory testing (which can take several weeks) prior to the beginning of the program. The cost of the examination can vary and supporting laboratory fees can range from $275 to $600 dollars or more depending on if the physician finds the need to run additional tests. You are personally required to provide the following forms completed and signed by the doctor: The attached National University Polytechnic Institute letter stating that you have passed the physical examination and are cleared for work as a diver and for hyperbaric exposures. The attached ADCI form (Medical History and Physical Examination) completed and signed by yourself and the physician. -
Supermicar Data Entry Instructions, 2007 363 Pp. Pdf Icon[PDF
SUPERMICAR TABLE OF CONTENTS Chapter I - Introduction to SuperMICAR ........................................... 1 A. History and Background .............................................. 1 Chapter II – The Death Certificate ..................................................... 3 Exercise 1 – Reading Death Certificate ........................... 7 Chapter III Basic Data Entry Instructions ....................................... 12 A. Creating a SuperMICAR File ....................................... 14 B. Entering and Saving Certificate Data........................... 18 C. Adding Certificates using SuperMICAR....................... 19 1. Opening a file........................................................ 19 2. Certificate.............................................................. 19 3. Sex........................................................................ 20 4. Date of Death........................................................ 20 5. Age: Number of Units ........................................... 20 6. Age: Unit............................................................... 20 7. Part I, Cause of Death .......................................... 21 8. Duration ................................................................ 22 9. Part II, Cause of Death ......................................... 22 10. Was Autopsy Performed....................................... 23 11. Were Autopsy Findings Available ......................... 23 12. Tobacco................................................................ 24 13. Pregnancy............................................................ -
Brochure.Pdf
C&W Diving Services, Inc. (C&W) and West Diving Services, Inc. (union side) is a San Diego Bay based marine contractor with a reputation for providing professional personnel, quality performance and value engineering in performance of commercial marine engineering, construction and vessel services. C&W continues in business with an experienced cadre of long time employed management and administrative staff, as well as, production personnel. Incorporated in 1979, C&W is a Service Disabled Veteran- Owned Business. C&W’s owner and president, Frederick West served in the United States Navy as a Seal Team 1 Operative and formerly the President of the San Diego Oceans Foundation. C&W has over 33 years of experience supporting the US Navy, US Coast Guard, Military Sealift Command and MSR within our Ship Husbandry Division; The US Bureau of Reclamation, Army Corps of Engineers, and local, state and federal municipalities throughout the United States within our Civil/Inland Division; Beta Offshore (formerly Pacific Energy Resources), SCE (San Onofre Nuclear Generating Facility), SDG&E and several other companies in the offshore and oil and gas industry. EXCELLENCE UNDER PRESSURE! C&W has extensive experience working on the water providing vessel support services. C&W’s vessel fleet is deployed along the West Coast of the United States and it’s crews have experienced all weather and sea conditions. In San Francisco Bay, C&W is providing all Tug and Crew/Supply Boat Services during the construction of the Caltrans new Oakland/ San Francisco Bay Bridge. This massive project requires daily scheduling and coordination between C&W Vessel Captains and the many contractors working on the Bridge, Caltrans Engineers and the US Coast Guard. -
Commercial Diver
You’re a what? Commercial diver ightening a bolt might seem simple, but inspect pipes in water treatment plants, or rig and by what if that bolt is 1,000 feet underwater? remove a 300,000-pound concrete remnant from Olivia TFor commercial divers, the ocean floor is the bottom of a river. Crosby an everyday workspace. Despite the exotic loca- Because their work is so varied, commercial tion, the jobs they do can be surprisingly familiar. divers must be able to adapt. “You need to be as “Usually we’re construction workers,” says flexible as possible,” says Ron. “Some days we commercial diver Ron Null. “The tasks we do are are making very sensitive measurements, some routine. But it’s not a routine environment.” And days we’re repairing a septic tank, and some days that means that even a simple task becomes more we’re just digging a ditch.” complicated. But whatever they’re doing, divers are usually Commercial divers build, repair, and inspect working wet—in dive suits designed for the type structures that are submerged in liquid. These of liquid they’re in and the pressure they’re under. divers might weld underwater cracks in deep-sea Divers often work in teams, with some divers oil rigs, lay the foundation for a bridge piling, in the water and others helping from the shore or on a boat. Each day begins with a briefing describing safety issues and who will do each underwater task and in what order. Then the divers suit up, put on their helmets or masks, and jump or slide into the water.