Geotechnical Investigations. The Contractor performs his own geotechnical site investigations he considers necessary to assist in the design of his works. The Contractor identifies and specifies all work and tests to be done. Geotechnical information provided to the Contractor during the tender phase is only for tender purposes and the Contractor is required to verify all geotechnical investigations to be conducted and condition during the execution of the project. The Contractor accepts full responsibility for all ground conditions and provides adequate foundation design.
Geotechnical Investigations. The Xxxxxxx Group (Xxxxxxx) will drill and observe ten air‐track borings to depths of approximately 15 feet below ground surface along the sewer alignments for Xxxxxxx, Stonehaven, TriPeaks, Forum, and Desert Skies alignments. Xxxxxxx will prepare traffic control plans for City approval and will provide traffic control during boring activities, and will clear drilling locations for underground utilities using a utility locator. Xxxxxxx will prepare a technical memorandum to summarize the subsurface conditions, where explored, and provide geotechnical recommendations.
Geotechnical Investigations. Engineer and its geotechnical drilling sub-consultant will perform a geotechnical investigation along the proposed alignment to observe subsurface conditions and support the design of the new gravity sewer. Engineer assumes the entire alignment will be constructed by open-cut, with the exception of the US-70 road crossing. All borings are assumed to be performed in unpaved areas. The scope of the subsurface investigation will consist of the following: Perform Standard Penetration Test (SPT) borings at approximately 500-foot-intervals along the alignment. Up to 16 borings will be drilled. In general, drill depths will extend to 2 feet below the proposed pipe invert. Observe and log soil and groundwater conditions in all borings. SPT split-spoon sampling will be performed in general accordance with ASTM D1586 and soil samples will be given a USCS classification. Where refusal is encountered above the planned depth of boring, rock coring will be performed to at least a depth of 2 feet below the proposed pipe invert. For trenchless borings (US-70), rock coring will be performed to extend borings to the shaft bottom. Borings where the pipe is proposed to be installed via open-cut will be backfilled with cuttings. Borings at the proposed trenchless crossing will be backfilled with grout. Conduct laboratory testing on selected soil samples to confirm soil classification, estimate engineering properties, and determine suitability for re-use as backfill materials. Upon completion of the geotechnical investigation, Engineer will prepare a geotechnical data report summarizing the subsurface conditions observed in the borings and containing all data (boring logs, laboratory testing, etc.) collected during the investigation. Horizontal location of the test hole shall be located using GPS services.
Geotechnical Investigations. The proposed project is to remove the existing single-lane bridge crossing of Xxxxxxxx Creek and replace it with a new bridge structure. The existing railroad flatcar bridge is 120-feet long and 13-feet wide. According to Caltrans bridge inspection reports, the existing foundations are spread footings at the abutments and steel H-piles at the piers and the structure is considered scour critical. Geologic mapping shows the site at the contact between Jurassic-Cretaceous Fransican Formation and Plio-Pleistocene Non-Marine sediments. The alluvial sediments are typically not associated with Naturally Occurring Asbestos (NOA) but this will be evaluated during the ISA. Bedrock is not exposed in the channel and bedrock may be deep below ground surface based on the surrounding terrain and geologic mapping. Bridge structure type has been tentatively defined in the RFP. It is indicated to be a reinforced concrete slab bridge in the range of 150±ft long and 22±ft wide supported on reinforced concrete wall-abutments. Suggested foundation types in the RFP include driven piles to 50-ft depths. CIDH piles may also be a feasible alternative for this site. Abutment locations and depth of pile caps will be established, in part, on the basis of projected channel grade and bank slope configuration/stability. It is assumed that abutments will be located at equal distances from the thread of the channel. Bridge line and grade are expected to generally match existing roadway. The existing roadway approaches appear to be on native ground (terrace materials) and it is understood that the roadway will be widened to accommodate wider travel lanes and shoulders.
Geotechnical Investigations. CONSULTANT will provide geotechnical services for the project as follows:
Geotechnical Investigations. Rotosonic Soil Borings A total of four soil borings are planned for this project: • Two borings are south of the existing oxidation ditch • One boring is south of the existing clarifiers. • One boring near the location of the proposed Rock Creek pump station Each boring will be advanced to a depth of 40 ft, or to a maximum of 10 ft into rock. Borings will be completed using a track-mounted Rotosonic drill rig equipped with 6-in. diameter casing. Photographs of the core samples will be collected at the time of the field explorations. Disturbed split-spoon samples will also be obtained from the borings at 5-ft depth intervals. The Standard Penetration Test will be conducted while the disturbed split-spoon samples are being taken. Rotosonic borings will be subcontracted to Xxxx Services, Inc. or Yellow Jacket Drilling Services. The drilling and sampling will be accomplished under the direction of experienced geotechnical engineering staff from GRI who will maintain a detailed log of the materials and conditions uncovered during the course of the work. After the completion of drilling and sampling, the boreholes not completed as a piezometer will be decommissioned in accordance with all Washington State regulations. A request to the Utility Notification Center will be made at least 48 hours prior to the start of the field exploration program. A private utility locator will also be retained to further evaluate the presence of underground utilities at each of the boring locations.
Geotechnical Investigations. The following are general geotechnical needs. Each project is unique and may require less effort than is included in the following or may require studies not included in the following. Any work required within a stream will require a permit from the California Department of Fish and Wildlife. Procurement of this permit typically takes about three months. Recent allowed access has been from 15 July to 15 October. Any field work performed in the right of way will be performed under an encroachment permit and include personal safety equipment and traffic control consistent with the Work Area Traffic Control Handbook.
Geotechnical Investigations. 4.1. Perform soil borings every 100 feet along roadway reconstruction, or as deemed appropriate by the Geotechnical Engineer
Geotechnical Investigations. A geotechnical report investigation shall be conducted and submitted containing boring logs (i.e. depth of bore, soil type, SPT-N blows per foot, in-place moisture content, and water table elevation). A Wyoming licensed Geologist shall determine the actual location(s) of all test borings with consultation with the City of Cheyenne staff. The report shall summarize all required data, testing, bore hole locations, results, and recommendations. It shall be assumed that test borings will be drilled using a truck-mounted drill rig and solid flight or hollow-stem augers. No rock drilling or sampling should be anticipated for this project. If, during the design process, it is found that initial geotechnical recommendations are not feasible or additional geotechnical investigation is required those services shall be discussed with the City as they relate to scope, fee and schedule. No further design work related that is related to the additional geotechnical work is to be completed prior to the additional investigation.
Geotechnical Investigations. A. Obtain and review existing and available geotechnical and geologic information. Perform field reconnaissance of project limits.
