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.
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* 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 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. 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 that shows the exploratory borings within the vicinity of the proposed improvements.
4.2.1.2. The Professional shall coordinate with NBU, the City of New Braunfels, and Texas 811 regarding underground utilities within the vicinity of the planned boring locations prior to commencement of the field exploration activities.
4.2.1.3. The Professional shall drill exploratory borings for the proposed improvements according to the schedule provided below:
4.2.1.3.1. one (1) boring to a maximum depth of 60 feet below existing grade;
4.2.1.3.2. eight (8) borings to a maximum depth of 30 feet below existing grade; and
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.
4.3.1.2. The Professional shall coordinate with NBU, the CoNB, and Texas 811 regarding underground utilities within the vicinity of the planned boring locations prior to commencement of the field exploration activities.
4.3.1.3. The Professional shall drill exploratory borings for the proposed improvements according to the schedule provided below:
4.3.1.3.1. nine (9) borings to a maximum depth of twenty (20) feet below existing grade; and
4.3.1.3.2. two (2) borings to a maximum depth of forty (40) feet below existing grade.
4.3.1.4. The borings located on the Project site shall be advanced using standard rotary drilling equipment with continuous-flight augers or rotary wash methods. Subsurface samples shall be collected using two (2)-inch diameter split-spoon sampler in conjunction with the standard penetration test (“SPT”). The Professional shall collect intermittent three (3)-inch diameter Shelby tube samples in between the SPTs.
4.3.1.5. The Professional shall record groundwater observations within the borings during drilling activities and at the completion of drilling and sampling.
4.3.1.6. The Professional shall backfill borings with auger cuttings upon completion of drilling and sampling.
4.3.1.7. The Professional shall patch borings drilled through pavement with like material (asphalt, concrete) upon completion of backfilling.
4.3.1.8. The Professional shall provide personnel experienced in logging borings, directing the drilling, and handling and transporting the samples. The Professional shall provide visual classification of the subsurface stratigraphy in accordance with the American Society for Testing and Materials, standard number D2488 and the Unified Soil Classification System during drilling and sampling.
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. 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. Site Access. The site access can be provided using a truck-mounted drilling rig along the major portion of alignment. Traffic control will be required. Due to presence of soft subgrade soils and potential access problems along a portion of the project alignment near FM 762 and at the proposed detention pond location, an ATV rig may have to be used to drill borings. Surveying. The client will establish and provide GET the boring coordinates and ground surface elevations. GET will mark the boring locations in the field so that the survey crew can locate them. Checking for Utilities. GET will call Texas 811-Call for the locations of utilities. GET will coordinate these activities. GET will not hire a contractor to conduct subsurface utility studies to find location of any and all utilities. This is not the scope of GET work. We recommend the scope of our work to include subsurface utility investigation at boring locations to assess those underground utilities are not hit during field exploration. Traffic Control. Traffic control will be required along the project alignment during our field exploration. The scope of our field work will require a lane closure during drilling and sampling and borehole grouting. Our traffic control will be subcontracted out. Drilling and Sampling. We will evaluate the soil stratigraphy and groundwater conditions for the proposed paving and storm sewer improvements by conducting fourteen (15) soil borings to a depth of 15-ft from existing grade. It should be noted that spacing between borings is about 500-ft. We will conduct two (2) soil borings near the proposed detention pond (optional) to a depth of 25-ft from existing grade. The Plan of Borings is shown on Plate 2. The borings schedule is as follows:
15 A truck-mounted drilling rig. An ATV rig may be needed, if wet and soft soils are encountered at the borings. Detention Pond (Optional) B-16 and B-17 25 A truck-mounted drilling rig. An ATV rig may be needed, if wet and soft soils are encountered. Note: Borings B-1 through B-5 were drilled previously by GET for tapers and roundabout additions to 10-ft below the existing grade at the project site. Hence, these borings will be augered to 10-ft and then drilled and sampled between 10-ft and 15-ft below the existing grade. Soil samples will be obtained continuously from the surface to the completion depth of borings. The cohesive soils will be sampled, using a Shelby Tube sampler. Standard Penetration Tests (SPT) will be performed ...
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.
4.2.1.2. The Professional shall coordinate with NBU, City of New Braunfels, and Texas 811 regarding underground utilities within the vicinity of the planned boring locations prior to commencement of the field exploration activities.
4.2.1.3. The Professional shall drill exploratory borings for the proposed improvements according to the schedule provided below:
4.2.1.3.1. one (1) boring to a maximum depth of 60 feet below existing grade;
4.2.1.3.2. six (6) borings to a maximum depth of 30 feet below existing grade;
4.2.1.3.3. two (2) borings to a maximum depth of 25 feet below existing grade; and
4.2.1.3.4. four (4) pilot hole borings for the purpose of locating below-grade voids.
4.2.1.4. The borings conducted on the Project Site shall be advanced using standard rotary drilling equipment with continuous-flight augers or rotary wash methods. Subsurface samples shall be collected using 2-inch diameter split-spoon sampler in conjunction with the standard penetration test (“SPT”). Intermittent 3-inch diameter Shelby tube samples shall be collected in between the SPTs.
4.2.1.5. The Professional shall record groundwater observations within the borings at the time of drilling and at the completion of drilling and sampling.
4.2.1.6. The Professional shall backfill borings with auger cuttings upon completion of drilling and sampling.
4.2.1.7. The Professional shall patch borings drilled through pavement with like material (asphalt, concrete) upon completion of backfilling.
4.2.1.8. The Professional shall have personnel experienced in logging borings, directing the drilling, and handling and transporting the samples. The Professional shall provide visual classification of the subsurface stratigraphy in general accordance to the American Society for Testing and Materials (“ASTM”), standard number D2488 and the Unified Soil Classification System (“USCS”) during drilling and sampling.
Field Exploration. Shall include site reconnaissance and borings.
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.
4.2.1.2. The Professional shall coordinate with NBU, City of New Braunfels, and Texas 811 regarding underground utilities within the vicinity of the planned boring locations prior to commencement of the field exploration activities.
4.2.1.3. The Professional shall drill exploratory borings for the proposed improvements according to the schedule provided below: