Bureau of Reclamation, Acquisition Operations Group, Code D-7810, Denver Federal Center, PO Box 25007, Denver CO 80225

B -- STANDARD PENETRATION TEST ENERGY MEASUREMENT SERVICES SOL 1425-97-SQ-81-92035 DUE 042897 POC Evelyn M. Tate 303-236-8040 x228 WEB: Bureau of Reclamation Denver Office Acquisition Home Page, http://www.usbr.gov/aamsden. E-MAIL: Contracting Officer's E-Mail address, etate@do.usbr.gov. Concerns having the ability to furnish the following services are requested to give written notification, including a telephone number for a poc to the acquisition office listed in this notice within 15 calendar days from the date of synopsis. The Bureau of Reclamation has the following requirement: 1. Scope: This Statement of Work (SOW) is for contracting of special Standard Penetration Test (SPT) energy measurements. The contractor will develop special instrumentation systems to measure energy at the top and bottom of an long string of drill rods. Measurements will be taken in two phases (May and September, 1997) at Terminus dam in California. Testing will be performed at depths of 140 to 200 ft. The contractor will analyze instrumentation data to determine energy content and losses on the drill string during testing. This work is being performed for the U.S. Army Corps of Engineers. 2. Location: Field work will be performed at Terminus dam. Terminus dam is located on the Kaweah River, about 21 miles east and upstream of the town of Visalia, Tulare County, California. 3. Government furnished property, material, or service: Reclamation will drill the pilot holes to the alluvium and will perform the SPT testing for USACE at the project site. Reclamation will perform these tests in accordance with ASTM D-1586 and D-6066. The SPT test consists of drilling to the depth of interest and driving a 2-inch sampler with a 140 lb hammer 1.5 ft. The number of blows, N, is counted over the last 1 ft of penetration to determine the blow count N. Reclamation will provide drilling rig(s), hammer systems, drill rods, samplers. Reclamation will provide the drilling crew, consisting of a driller and helper(s). The helpers can assist the contractor in general labor requirements, i.e, moving equipment, placing rods, and other duties as required. Reclamation will provide the contractor with a short 2 -ft section of NWJ drill rods for the contractor to instrument, if required. Reclamation will coordinate mobilization with the contractor to assure that measurements can be obtained on all SPT borings. Drilling will be performed on the downstream toe and upstream face of the dam in 10 drill holes. The dam is operated by USACE. Site access will be arranged by USACE. Contact person for the Corps is John Nickell CESPK-ED-GD, Sacramento, CA. Reclamations contract technical representative will be onsite during all testing. He will also review draft reports for final approval. 4. Methods to be used: Drill rod energy ratio, Eri, from the top transducer package will be measured in accordance with American Society for Testing and materials standard D-4633-86 (ASTM Annual Book of Standards, volume 04.08, 1994). Kc and K1 factors should not be applied. Correction factor K2 will not be required due to long rod length. The travel time to the return of the reflective compression wave will be reported. This method is know as the F2 approach. Drill rod energy ratio will also be determined using the Force and Velocity method, where the product of force and velocity shall be integrated over two different time periods. The integration should be over the complete wave trace and the first pulse and return (time = 2l'/c, where l' is length of rod and c is the compression velocity in steel). By integrating only the first pulse, direct comparison to F2 approach will be possible. 5. Specific Requirements: 5.a. Contractor experience -- the contractor should have experience performing dynamic force and velocity measurements of both pile driving and SPT drilling activities. These dynamic force and velocity measurements are not easily performed. The data is recorded over a period of milliseconds with high resolution data acquisition systems. Operators of commercially available pile driving analyzing equipment, may not have sufficient experience performing these measurements in SPT testing, due to un-restrained nature of the drill rods and resulting high frequency and high acceleration data. Previous work indicates special accelerometers are required to obtain reliable data. The contractor must demonstrate successful application of such equipment to SPT testing through several published reports showing successful results. Several practitioners have published data which does not show true proportionality between force and velocity traces because of their in-experience with dynamic measurement systems. The contractor must provide a pretested instrumentation system which has proven to deliver data with verifiable force and velocity under SPT drilling conditions. Successful contractor should be able to demonstrate 5 years experience in obtaining reliable force and velocity data in SPT applications. 5.a. Phases -- there are five phases of the work; Phase 1. Prepare Instrumentation systems Phase 2. Perform measurements in 5 holes along the downstream toe May to June 1997. Phase 3. Analyze data from Phase I, preliminary modeling tested. Phase 4. Perform measurements in 5 drill holes on the upstream face of the dam. Phase 5. Analyze data and report. 5.b. Tasks Phase 1 -- Construct two instrumented subassemblies of a short section of NWJ drill rod. Contact Reclamation to be sure rods types are the same. The instrumented subassemblies will have a minimum of 2 strain gages and 2 accelerometers mounted in a diametrically opposed position. The bottom subassembly will be located downhole just above the sampler barrel. The bottom subassembly should be waterproofed and be supplied with waterproof cable to reach to the surface. The bottom subassembly must be capable of insertion through 3.75 inch inside diameter hollowstem augers. The maximum hole depth will be 200 ft. The top subassembly will contain the same instrument array as the bottom but does not require long cabling and clearance requirements for the bottom assembly are not required. The sub-assemblies should be calibrated in the laboratory to show correct response to transient loads. This calibration should use traceable force and acceleration standards (NIST standards). The contractor must supply data aquisition equipment capable of 1) displaying drill rod energy transmission for each hammer blow and 2) capability of storing the complete time history record of force and velocity for most of the blows of each SPT test. The data aquisition equipment should have real time direct integration capability to report drill rod energy as blows are being applied, such as paper tape or LED readout. The data aquisition equipment must be specially designed for Pile driving or SPT data aquisition and must have the following capabilities; -- Automatic data storage -- Automatic data presentation software -- Four strain channels -- Four acceleration channels (piezoresistive or piezoelectric) -- Four velocity integrators -- Automatic balancing of signals -- Built in A/D converter, 8 channels at up to 20Khz each. Once the instrumentation packages are ready, the contractor should notify the contract technical officer so that field drilling can be coordinated.Phase II -- The contractor will provide the instrumentation systems and an experienced engineer for 5 days of field measurements. Five drill holes will be drilled in the downstream portion of the dam. The test depth is around 145 ft. Eight inch pilot holes will be pre-drilled by Reclamation prior to arrival. These holes will be backfilled with pea gravel. Re-drilling will be performed by Reclamation with a rotary drill equipped with hollow-stem augers. The hollow-stem augers will be advanced to the base of the pre-drilled hole. Drill fluid will be added to the column in preparation for SPT testing. SPT testing will be performed by Reclamation at 2.5 ft intervals for approximately 20 to 30 ft of testing. SPT will be performed by Reclamation in accordance with ASTM D-1586, and D-6066. The blow count rate will be controlled by automatic hammer settings and will likely be 40 blows per minute, but could range from 20 to 50 blows per minute. Reclamation has not selected the drill for the SPT testing. It is anticipated the drill may be a CME 85, 75 or Mobil B-61. The contractors equipment must allow for normal conduct of the SPT by Reclamation. This means the transducer and data collection system must not interfere with the hammer drop system. Also, the contractor shall supply cable reel systems and cable tie systems to expedite placement of the sampler and rods. Since the alluvium is only 20 to 30 ft thick, there will only be about 10 SPT tests performed by Reclamation on each hole. Reclamation anticipates that one hole can be completed each day. Since part of the day will be getting augers back down to depth, the contractor can assume a good portion of each dam can be in standby status. The duration of the field work will be 5 calender days. Reclamation drill crews will work 10 hr days. The contractor will bill mobilization and field labor costs as separate items. If Reclamation's drill breaks down, the contractor will remain on site in a standby status and will be reimbursed for this field cost. Thecontractor is responsible for warning Reclamation drill operators of impending damage to their equipment. During performance of the SPT the contractors field engineer should evaluate the data and in consultation with the Contract Technical Representative, decide on the necessary sampling rate for storage of complete wave forms. The data aquisition equipment must be capable of storing all data from a series of blows. At a minimum, at least 3 blows of complete waveform data should be stored. It is doubtful however, that complete waveforms will be stored for all blows. Field integration of drill rod energy, as calculated from the top transducers must be performed for all hammer blows in the test. The foundation materials may be gravelly with N values over 50. In these cases, reflected compression waves may occur. The contractors equipment must be capable of recording an interpreting force and velocity data for either tensile wave or compression wave returns. Phase 3 -- Interim Report -- Prior to the fall mobilization, the contractor will issue a report for review by the Contractor Technical Representative. The draft report should be completed 4 weeks after the field testing. The report should include the following elements; -- Summary of drill rod energies from the top transducer as outlined in section 3. Three values of Eri will be reported, F2, FxV (2l'/c), and FxV complete wave. This data should be available for at least three blows of data for each SPT test (approximately 50 tests). The report will include example wave traces showing integration cutoff times. -- Evaluation of energy loss by comparing the top and bottom load cells. The contractor must evaluate energy losses in the first wave pulse and the complete wave pulse.. -- Modeling -- The contractor should apply GRLWEAP and CAPWAP modeling software to the SPT drill rod system. The model should be tested on a ranges of depths tested . The model should then be extended to predict energy losses at a 180 to 200 ft rod lengthcondition (fall program). The Contract Officers Technical Representative (COTR) will review the draft report with 2 weeks of issue. The contractor should strive to resolve any questions or propose modifications to the procedures used for next set of measurements (fall program). The Contractor should finalize the interim report within 3 weeks of receipt of COTR's review. Phase 4 On phase 4 another series of 5 drill holes will be installed in the upstream face of the embankment. The depth interval of testing will be 185 to 200 ft. This testing is expected to occur in September or October of 1997. The contractor will coordinate with Reclamation for the appropriate start date. The possibility exists that a different drill and hammer system will be used on the second round of drilling, but the same drill rods will be used. The contractor will perform measurements on these holes over a period of 5 days. Reclamation estimates this testing duration as before, i.e., 5 holes in one week. See Phase 2 writeupfor sampling considerations. As with Phase 2, all Phase3 work will in the field, Reclamation will provide the drilling, and the contractor responsibilities are the same as given under Phase 2. There may be a desire to change some operating variables to test modeling procedures. For example, the automatic hammer adjustment may be set differently to evaluate effects of lower energy transmission. Or, shallower tests may be attempted. Phase 5 -- Final report. A final report should be issued to complete the Project. The final report should include the same items in the Phase 3 interim report as follows; -- Summary of drill rod energies from the top transducer as outlined in section 3. Three values of Eri will be reported, F2, FxV (2l'/c), and FxV complete wave. This data should be available for at least three blows of data for each SPT test (approximately 50 tests). The report will include example wave traces showing integration cutoff times. -- Evaluation of energy loss by comparing the topand bottom load cells. The contractor must evaluate energy losses in the first wave pulse and the complete wave pulse. -- Modeling -- Discuss the differences in measured and predicted energy losses in NWJ drill rod in the deeper holes in phase 4. Refine the GRLWEAP and CAPWAP models for other drill rods. Predict the performance of other commonly used drill rods such as A and B sizes. A draft report shall be submitted to the COTR within 2 weeks of completion of phase 4 field testing. The COTR will review the draft report within 2 weeks of draft submission. The contractor shall provide 10 copies of a final report within 2 weeks of receipt of draft review comments. 6. Deliverables Deliverables include Draft interim report and a final report as outlined in Section 5, Phase 3 and 5. Delivery dates and other details have already been given in section 5. 7. Time Schedule -- (ESTIMATED) Phase 1 -- May 16, 1997 Phase 2 -- June 2 through 6, 1997 Phase 3 -- August 1, 1997 Phase 4 -- Sept 15 through 19, 1997 Phase 5 -- Sept 22 through October 31, 1997 Comments on the time schedule. Drill scheduling by Reclamation can be influenced by many factors. For example, a safety of dams problem in another region can detain our drill crews. The phase II drill measurements have been tentatively scheduled for mid May. If the contractor can prepare the instrumented sub quickly -- Phase II drilling can be scheduled for Mid May start. 8. Inspection and Acceptance -- The COTR will provide the contracting officer with inspection or acceptance reports. 9. Proposed Bid Schedules and Partial Payments The following bidding schedule is recommended a. Instrumentation Package development and calibration Phase 1 -- lump sum b. Project mobilization -- Phase 2 -- lump sum c. Travel and living Expenses -- Phase 2 -- Daily rate d. Field Staff day cost for Project engineer -- Daily rate e. Draft Interim report Phase 3 -- lump sum f. Project mobilization -- Phase 4 -- lump sum g. Travel and living Expenses -- Phase 4 -- Daily rate h. Field Staff day cost for Project engineer 4 -- Daily rate I. Final Report -- Phase 5 -- lump sum An invoice may be submitted after completion of Phase 3 and the COTR will review for approval for payment. The contractor must not initiate any work outside the scope of the initial agreement without approval of the contracting officer. This is not a formal solicitation. However, concerns that response shall provide detailed data concerning their capabilities and may request to receive a copy of the solicitation when and if it becomes available. This notice may represent the only official notice of such a solicitation. (0100)

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