For highway construction oregon department of transportation salem, oregon
SECTION 00921 - MAJOR SIGN SUPPORT DRILLED SHAFTS
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- Navigate this page:
- 00921.02 Subsurface Investigation
- 00921.10(b) Concrete
- 00921.12 Concrete Mix Design
- (Use the following subsection .45(a) when the foundation will be embedded in rock or there is another reason to have additional reinforcing cage length. Check with designer.)
- 00921.49 Scheduling and Restrictions
- 00921.80 Measurement
SECTION 00921 - MAJOR SIGN SUPPORT DRILLED SHAFTS(Follow all instructions. If there are no instructions above a subsection, paragraph, sentence, or bullet, then include them in the project. The specifications may be modified to include project specific specifications, but all additions, deletions, or modifications must be sent to the ODOT Technical Resource and Senior Specifications Engineer for review and approval.) Comply with Section 00921 of the Standard Specifications modified as follows: 00921.02 Subsurface Investigation – Add the following paragraph to the end of this subsection: It shall be understood that data obtained from borings and other subsurface investigations do not and cannot disclose all subsurface conditions that may be encountered. The explorations completed for the westbound structure foundation at Site US26-D “Deer” were terminated above the planned foundation tip elevation; however, the Contractor is advised that borings and investigations strongly indicate that significant quantities of cobbles, boulders, and basalt bedrock are present at the foundation location. It is anticipated that very soft (R1) to very hard (R5) bedrock is present near the terminated depth of boring B-US26WB MP71.91”Deer” and approximately 20 feet of rock excavation will likely be required to the planned depth of the drilled shaft. 00921.10(b) Concrete - Replace this subsection, except for the subsection number and title, with the following: Use Class 4000 drilled shaft concrete according to Section 02001, except as modified in this Section. Water may be added to the concrete mix at the Project Site only if allowed by the approved mix design. Concrete in drilled shafts that are placed within 0-2 feet of the surface shall be air entrained according to Tale 2001-2. 00921.12 Concrete Mix Design - Delete this subsection. 00921.40(a) Drilled Shaft Installation Plan - (Use the following paragraph and bullet when the foundation will be embedded in rock or there is another reason to have additional reinforcing cage length. Check with designer.) Replace the bullet that begins "Unstamped reinforcing steel shop drawings…" with the following bullet: Unstamped reinforcing steel shop drawings and details of reinforcement placement, including bracing, splicing, centering, lifting methods, and the method for supporting the reinforcement on the bottom of the shaft excavation according to 00150.35. Include details on the type, number, and placement of spacers and other devices for ensuring the reinforcing cage position is maintained during construction. Include details for attaching the CSL test access tubes to the reinforcing cage (if applicable). Replace the bullet that begins "Provide documentation that assures…" with the following bullet: Documentation that assures that the concrete mix design will maintain the required slump retention properties specified in Section 02001. Add the following bullet before the bullet that begins "Details of concrete placement…": If the concrete mix design allows the addition of water at the Project Site, documentation that specifies the amount of water that may be added and allowable methods for adding the water. (Use the following subsection .45(a) when the foundation will be embedded in rock or there is another reason to have additional reinforcing cage length. Check with designer.) 00921.45(a) Placement - Replace the paragraph that begins "In each shaft, place…" with the following paragraph: In each shaft, place reinforcing steel extending from 6 inches above the bottom of the shaft excavation to the elevation shown. The reinforcing cage may be supported on the bottom of the shaft excavation if approved. Support the reinforcing cage to prevent distortion or settlement during concrete placement. Support the reinforcing cage such that the supporting mechanism does not obstruct the center of the shaft and allows concrete placement vertically down the center of the shaft. If concrete placement does not immediately follow cage placement, remove the reinforcing cage from the excavation and rectify the integrity of the excavation prior to reinstallation of the cage. Add the following paragraph to the end of this subsection: To accommodate variations in shaft length, furnish steel reinforcing bar cages, including CSL access tubes if specified, 4 feet longer than the lengths shown. Add the increased length to the bottom of the cage. Following bottom cleanliness approval, trim the bottom of the steel reinforcing bar cage to the proper length prior to placing it in the excavation. Shift or trim CSL access tubes (if present) to the revised cage length. If CSL tubes are cut, adapt the ends of the tubes to receive the watertight caps as specified. 00921.49 Scheduling and Restrictions- Replace the paragraph that begins "After the first drilled shaft on the project…" with the following paragraph: After the first drilled shaft on the structure has been accepted, make no significant changes in construction methods, equipment, or materials used to construct subsequent shafts, unless otherwise approved 00921.80 Measurement - The estimated quantities of materials for the sign support drilled shaft foundations are: (Fill in the blanks with the appropriate quantities. Obtain information from the designer.) Location Material Quantity (Br No. US26 B MP 69.91_______)Structure Type ____________ Concrete 2926_____ cu. yds. (Br No. _______) Class 4,000 Uncoated Reinforcement 5,201______5212 pounds Grade 60
Diameter 5 foot Drilled Shaft Excavation 4036 (feet)_____ cu. yds. CSL Tubes 215212_____ feet CSL Test 1_____ each Miscellaneous Steel 1551 pounds
Class 4,000 Uncoated Reinforcement 10,86717,245 pounds Grade 60
Diameter 5 foot Drilled Shaft Excavation 8070 (ft) cu. yds.feet CSL Tubes 215468 feet CSL Test 2 each US26 EB MP 72.63 Concrete 22 cu. yds. Class 4,000 Uncoated Reinforcement 3,8844,520 pounds Grade 60
Diameter 5 foot Drilled Shaft Excavation 30 (ft) cu. yds.feet CSL Tubes 165180 feet CSL Test 1 each Miscellaneous Steel 1458 pounds I-84 BB MP 1.61 Concrete 2923 cu. yds. Class 4,000 Uncoated Reinforcement 5,2014,817 pounds Grade 60 Diameter 5 foot Drilled Shaft Excavation 4033 (ft) cu. yds.feet CSL Tubes 215194 feet CSL Test 1 each Miscellaneous Steel 1053 pounds I-84 E MP 3.55 Concrete 7770 cu. yds. Class 4,000 Uncoated Reinforcement 17,16622,417 pounds Grade 60
Diameter 5 foot Drilled Shaft Excavation 10798 (ft) cu. yds.feet CSL Tubes 281627 feet CSL Test 2 each I-84 H MP 5.59 Concrete 7568 cu. yds. Class 4,000 Uncoated Reinforcement 16,06422,024 pounds Grade 60
Diameter 5 foot Drilled Shaft Excavation 10394 (ft) cu. yds.feet CSL Tubes 273609 feet
Class 4,000 Uncoated Reinforcement 5,0695,048 pounds Grade 60
Drilled Shaft Excavation 3934 (ft) cu. yds.feet CSL Tubes 210204 feet CSL Test 1 each Miscellaneous Steel 1053 pounds Miscellaneous metal for the Monotube Sign Supports foundations includes anchor rods and associated hardware, templates and anchor plates. Structure Type ____________ Concrete _____ cu. yds. (Br No. _______) Class 4,000 Uncoated Reinforcement ______ pounds Grade 60
CSL Tubes _____ feet CSL Test _____ each Directory: Region1 Projects -> 19100 Region1 ATM Project 19100 Region1 ATM Project -> For highway construction oregon department of transportation salem, oregon Download 1.43 Mb. Share with your friends:
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