Idea Transcript
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Provision Name: ITEM 9005-0007 - DYNAMIC PILE LOAD MONITORING Instructions for Usage: Use when foundation approval letter indicates. Requires edits in the Provision Body for location of dynamic monitoring of test piles. When using this item, use work class code(s) U. Header: ITEM 9005-0007 - DYNAMIC PILE LOAD MONITORING Provision Body: I. DESCRIPTION— -This work is providing Pile DynamicDriving Analyzer (PDA) load testing and analyses/evaluations as outlined herein. the dConduct dynamic testing on the specified pile(s) monitoring of each test pile at each substructure location for: (insert location(s) of dynamic monitoring testing of test piles),as indicated or as specifieddirected by the Representative directed. Re-drive all test piles, and monitor the test piles during the re-driving. Perform monitoring by the use of electronic monitoring equipment. Conduct dynamic monitoring testing during the entire time piles are initially driven and during the time piles are re-driven, if applicable per separate Special Provision. The purpose of dynamic monitoring is to provide the Project ManagerDepartment with supplemental information for evaluating pile hammer performance, driving stresses,, and bearing capacities. Only monitor piles during re-driving that were monitored during the initial driving. The number of piles dynamically monitored may be increased, or decreased, or entirely deleted from the Contract at the discretion of the RepresentativeProject Manager. Work shall be performed by a firm with a minimum of 5 years of experience in the use of the Pile Driving Analyzer and related equipment. Firms are required to show experience in the following: • Installing or supervision of the installation of the necessary equipment • Use of the Pile Driving Analyzer and related equipment to perform the dynamic pile monitoring Submit to the Department the required experience for the use of a Pile Driving Analyzer to the District Structure Control Engineer for approval. II. MATERIAL— -Perform dynamic monitoring with a Provide Pile Driving Analyzer, with all equipment and accessories conforming to the requirements of ASTM D4945, Standard Test Method for HighStrain Dynamic Testing of Deep Foundations, for allthe dynamic monitoring and analyses as specified.
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as manufactured by Pile Dynamics, Inc., 4423 Emery Industrial Parkway, Warrensville Heights, Ohio 44128, Telephone No. (216) 831-6131. III. CONSTRUCTION— -(a) Employ an organization having documented experience in the use of pile driving analyzers and related equipment to install or supervise the installation of the necessary equipment and to perform the dynamic monitoring. Perform the dynamic monitoring with a professional engineer and operators experienced in dynamic monitoring and meeting the following qualifications: 1.
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The dynamic monitoring operator will have a minimum of three (3) years of experience that demonstrates successful performance on at least three (3) projects in similar geotechnical conditions with the use of high-strain dynamic pile testing. Include a brief description of each project and the name and phone number of the owner’s representative knowledgeable in each project listed. Furnish the full name and license number of a Professional Engineer registered in the Commonwealth of Pennsylvania, having at least five (5) years of experience in the performance of dynamic monitoring of driven piles, who is to supervise the work and prepare test reports. Do not use only the company names of consultants or manufacturers to meet the requirements of this section; use the names of the personnel. Submit documentation of staff qualifications to the Representative and allow at least 21 calendar days for approval. Submit proposed methods of documentation and reports to the Representative for approval. Include the format of the electronic template for the submission of pile driving records. Dynamic monitoring will not begin prior to obtaining approval by the Representative.
(b) Perform dynamic pile monitoring only when if the Project ManagerStructure Control Engineer is present for witnessing during the entire time piles are driven or re-driven. Notify the Project ManagerRepresentative of a tentative schedule for monitoring at least 21 calendar days before starting the tests. Notify the Project ManagerRepresentative of the exacta firm date at least 48 hours before starting the tests, but give the notice between start of work on Monday and noon of the following Friday. Do not schedule dynamic monitoring on Saturdays, Sundays,, or Hholidays. Perform dynamic testing following procedures as defined in ASTM D4945. Drill the necessary holes in the wall of the fluted taper pile, to and fasten a pair of transducers and a pair of accelerometers in place. Then d Drive the pile while testing until ordered to stopped by the Project ManagerStructure Control Engineer. Remove the transducers and accelerometers after the dynamic monitoring is completed. (c) Page 2 of 3
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(d) Use the Pile Driving Analyzer to furnish print for each blow selected by the Project ManagerRepresentative, a Dynamic Pile Testing Report with, at the minimum, the following values: 1. combination of the following quantities; bearing capacity from the Case-Goble Method; iInput and reflection values of force and velocity; 2. mMaximum transferred energy, maximum compression forcestress, maximum tensile stress, bearing capacity, pile capacity, velocity, and displacement; 3. Hammer operating rate in blows per minutes (include ram strokes, fuel settings, pressures, etc. as applicable); 4. vValue of upward and downward traveling force wave e; and ram stroke and corresponding blow sequence. Deliver to the Project ManagerRepresentative the printed output records from the Pile Driving Analyzer together with data to correlate the records with the respective pile driving records as the tests are completed. (e) Supply this information to the Project ManagerRepresentative within 24 hours of testing. Record all signals on magnetic tape or approved electronic media. (f) Perform supplementary office analysis for each pile dynamically tested including CAPWAP analyses, to determine pile tip elevations, pile capacity, soil resistance distribution, dynamic soil properties of shaft and toe quake and damping resistances, and driving stresses throughout the pile for each substructure unit. Evaluate and report the pile capacity versus plan factored axial resistances, maximum measured driving stress at absolute refusal, hammer system efficiency, and pile structural damage/integrity. Submit a preliminary report within 48 hours and complete report, signed and sealed by a professional engineer licensed in the Commonwealth of Pennsylvania, to the Representative within five (5) days of testing.
IV. MEASUREMENT AND PAYMENT— -- Each Applies if when dynamic testing is performed while driving the entire length of pile, including re-driving if applicable. The Department will pay for all dynamic pile monitoring conducted for verification of hammers which are subsequently used to drive more than 10% of the accepted bearing piles in a bridge, and for approved hammers which are not deficient, but are subsequently rejected. The payment for each test will include costs All costs of furnishing dynamic monitoring services and equipment, tools, labor, and incidental work necessary to monitor the dynamic monitoring and to provide the data and results specified. are included in the payment for each test.
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The number of tests may be revised by the Representative due to subsurface conditions or due to hammer performance. Also included is the cost of any interruptions, delays, or time lost due to malfunctioning, breakdown of equipment, or inclement weather. No payment will be made for the following: • •
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Testing that is unable to be completed or terminated by the Contractor prior to driving the entire length of the pile. wWork determined by the Representative to be unsatisfactory by the Project Manager due to improper driving, methods, inadequate equipment and materials, or unacceptable splice welding. , The cost for interruptions, delays, time lost due to malfunction, breakdown of equipment, or inclement weather. Any additional testing done without the prior approval of the Representative. or inadequate material.All costs associated with replacing a hammer rejected due to unacceptable performance based on the dynamic pile load testing results, or if the contractor should choose to replace an already accepted hammer. These costs include, but are not limited to, transporting the replacement hammer to the job site, unloading and setup, additional analyses and submissions, additional dynamic pile load tests required for the replacement hammer acceptance, lost production time, etc. Prior to driving any piles with the new hammer, the Contractor must submit the operating specifications and Pile Hammer Data sheet (CS-5 form) in order to request a WEAP analysis for acceptance of the proposed hammer; following the same submission process and procedural process for acceptance as was required for the original hammer.
The number of tests may be revised due to subsurface conditions or due to hammer performance.
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