Field Exploration. 4.3.1.1. The Professional shall determine the required boring locations on the Project Site. The Professional shall provide a boring site location map that shows the exploratory borings within the vicinity of the proposed improvements and along the proposed water main alignments.
Field Exploration. 4.2.1.1.The Professional shall determine the required boring locations on the Project Site. The Professional shall provide a Project Site boring location map to NBU via email prior to start of the field work that shows the exploratory borings within the vicinity of the proposed improvements and along the proposed water main alignments.
Field Exploration. Based on the available project information, ATL proposes the following borings to investigate the subsurface soils and groundwater conditions along the site boring locations and are presented in Figures 1 & 2. Site Borings Total No of Boring Boring Designation Depth (ft) Total Depth (ft) Xxxxx Xxxxx Xxxx Xxxxxx Xxxxxx 0 X-0 & P-2 80 160 Paving 2 P-3 thru P-4 20 40 Piezometer 1 P-1 (PZ-1) 50* 50* Pecan Creek Road (Total Depth, ft.) 000 Xxxxx Xxxxx Xxxx Xxxxxx Xxxxxx 2 C-1 & C-2 80 160 Paving 2 C-3 thru X- 00 00 Xxxxxxxxxx 0 X-0 (PZ-2) 50* 50* Cedar Creek Road (Total Depth, ft) 000 Xxxxx & Xxxxx Xxxxx Xxxx (Total Depth, ft.) 400 The proposed borings are located within existing pavement thus coring will be required. Soil samples will be obtained continuously to a depth of 20 feet, and at 5-ft intervals thereafter. Standard \\atl-server\GEO\Proposal\2019\CP19-1102 Pecan-CedarRD Bridges\Pecan & Cedar Creek\CP19-1102 Pecan & Cedar Creek Bridges.doc 0000 Xxxxxxxxxxx Xxxx., Xxxxxxx, Xxxxx 00000 Tel: (000) 000-0000 Fax: (000) 000-0000 Penetration Tests (SPT) will be performed in sands, if encountered, and clays will be sampled by Shelby tube. Shear strengths of the clays will be measured in the field with a hand penetrometer and correlations between this data and laboratory shear strength data will be made during analysis. Depth to groundwater will be important for the design and construction of this project. For this reason, the borings will be drilled dry and the depth at which groundwater is encountered will be recorded. The boreholes will be left open for 24 hours, and 24-hour water level will be recorded, and the boreholes will be grouted after the completion of drilling and sampling. two (2) 50-ft deep piezometers will be installed to monitor the 24-hr, 7- and 30-day ground water level. The piezometers will be pulled and plugged after the 30-day water level reading. Consolidated- undrained Triaxial Test (ASTM D 4767) 3-stage with 3 samples set, and soil dispersiveness tests (double hydrometer Test, Crumb Tests) are required at channel cross section.
Field Exploration. Site Access. The project alignment is along the existing 2-lane asphalt roadway. Therefore, site access can be provided, using a truck-mounted drilling rig. Traffic control will be required. Due to presence of soft subgrade soils and potential access problems, an ATV rig may have to be used for the boring near the proposed outfall (optional).
Field Exploration. ATL performed site reconnaissance. Project alignment will be accessible with our truck- mounted drill rig, and traffic officer and flag man with control signs and cones will be use during drilling operation for work personnel safety. Based on Boring Depth and Frequency requirements provided conduct geotechnical investigation involving six (6) at 15-ft deep soil borings for the road improvements. Soil samples will be obtained continuously to a depth of 15 ft. Standard Penetration Tests (SPT) will be performed in sands, if encountered, and clays will be sampled by Shelby tube. Shear strengths of the clays will be measured in the field with a hand penetrometer and correlations between this data and laboratory shear strength data will be made during analysis. Depth to ground water will be important for the design and construction of this project. For this reason, the borings will be drilled dry and the depth at which groundwater is encountered will be recorded. The boreholes will be grouted with cement-bentonite slurry after the completion of drilling and sampling.
Field Exploration. Shall include site reconnaissance and borings.
Field Exploration. ATL performed site reconnaissance. Project alignment will be accessible with our truck-mounted drill rig, and Peace officer and flag man with control signs and cones will be at site during drilling operation for work personnel safety. Based on the Boring Depth and Frequency Requirements provided, ATL proposes the following T:\Proposal\2021\GP21-0417 - Xxxxxxxxxx-Xxxx\GP2021-0417 Proposal.doc
Field Exploration. Drilling The requested subsurface field exploration includes a total of eight (8) vertical test borings near the proposed levee location (west of McCarran Blvd and north of Mill Street) to depths of 30 feet bgs. Borings will begin using hollow stem auger techniques. Groundwater is expected to be shallow in the area and mud rotary drilling techniques may be required to collect soil samples located below the groundwater table to prevent heaving. The proposed drill rig is capable of performing both hollow stem auger and mud rotary techniques. Due to the possibility of soft subgrade soils, we are proposing to complete the work with a track mounted drill rig. Based on conditions at the time of drilling, a two-wheel drive truck mounted drill rig may be used. SPT (1.4”ID) and Modified California (2.4”ID) sampling will be completed in the test borings at intervals varying from 2.5 to 5 feet. The number of blows to drive the sampler one-foot into undisturbed soil (Standard Penetration Test) is an indication of the density and shear strength of the material. If soft fine- grained soils are encountered, Shelby tubes may be pushed. Our geotechnical personnel will log material encountered during exploration in the field in accordance with ASTM D2488. The groundwater surface will be measured if encountered. Representative soil samples will be returned to our laboratory for testing. Borings will be backfilled with grout or bentonite chips. Excess soil cuttings and drilling mud will be disposed of on site. Laboratory Testing Anticipated laboratory testing includes index testing, soil moisture content, direct shear testing, moisture- density unit weights, unconfined compression testing, corrosion testing, hydraulic conductivity, and triaxial testing to determine undrained shear strengths. Actual test quantities will be determined by USACE and billed at a unit rate; cost estimates provided below are anticipated test quantities and are subject to change. SUB-CONSULTANT’s laboratory is certified as a USACE qualified material testing laboratory. For specialized strength and hydraulic conductivity testing, CME will outsource these tests to an USACE qualified material testing laboratory out of California.
Field Exploration. Xxxx, Xxxxxxxx & Associates will retain a geotechnical-related drilling company to perform the necessary drilling operations to obtain soil data and selected soil samples. The drilling operation will include eight (8) test borings drilled to depths of 25 and 40 feet or refusal, whichever is less. The borings will be drilled along the top of the levee. Depending on accessibility constraints, weather and site conditions permitting, both truck-mounted and portable drilling rigs will be employed in the field investigation. In-situtesting and sampling will be performed at selective depths. The samples will be sealed and returned to our laboratory for testing. Soil profiles will be developed during drilling, and modified as required based on the laboratory index property results as discussed below. It is the CLIENT'S responsibilityto provide access to the (outboard) toe of the embankment area. It is understood that we would be granted free access to the project site for all necessary equipment and personnel, and that the Client has notified any and all possessors of the project site, whether they be lawfully or unlawfully in possession.
Field Exploration. Provide traffic control measures utilizing a detour and signage. • Advance approximately six exploratory borings, one at each anticipated abutment location (up to 120 foot depth), two at the potential retaining wall locations (up to 60 foot depth), and two in the approach roadway (up to 45 foot depth). These explorations will provide an evaluation of subsurface soils/rock conditions for the proposed structure. The anticipated bridge will be single span with an approach fill height not likely to exceed 5 feet. • Standard penetration test in accordance with the Caltrans Soil and Rock Logging, Classification, and Presentation manual, June 2010. • Logging of the borings, and identification of the various earth materials encountered during the exploration. • Samples of the major earth units will be obtained, and the in-place density of the various strata encountered in the exploration will be determined. • Upon completion, backfill borings in accordance with County permit requirements. Excess drill cuttings will be spread onsite or off-hauled as required. • Coordinate with Environmental CONSULTANT to review geotechnical boring samples for archeological findings, if necessary. • A portion of the borings may be replaced by Cone Penetration Tests (CPTs) for obtaining continuous soil data and shear wave velocity measurements for geotechnical analyses.
