Geotechnical Design Report. (i) The Company shall ensure that the Designer shall prepare a Geotechnical Design Report as defined in the DMRB for all earthworks, foundations or other geotechnical design elements of the scheme in accordance with BS EN 1997-1, which may be subdivided and arranged as appropriate. The report(s) shall be updated to take account of any supplementary ground investigations or other relevant additional information as the New Works proceed.
(ii) The clause 2.8(3) of BS EN 1997-1:2004 shall be considered to be a principle in the context of the Eurocodes, i.e. 2.8(3) P.
(iii) The relevant part(s) of the Geotechnical Design Report(s) shall be submitted to accompany each Earthworks and Structures Design Statement and each Earthworks and Structures Design Certificate. The final report(s) shall be submitted prior to submittal of the relevant Construction Certificate(s).
Geotechnical Design Report. A design-level materials report will be prepared for the project. The report will include the following: Description of physical properties and characteristics of the existing pavement section and subsurface soils and groundwater A plan showing the locations of borings and log of borings Discussion of the physical setting (climate, land use, geology, and pertinent reports) Discussion of existing facilities and proposed improvements including existing pavements, field exploration, laboratory testing, and surface water Discussion of corrosivity of soils with respect to concrete Discussion of pertinent geotechnical factors (soil, geology, and groundwater) that could affect the design and construction of this project; and Conclusions and recommendations for the following: o Impacts of questionable soils (expansive, compressible, resistant), if encountered, and mitigation o Soils corrosive to concrete o Re-use of the existing pavement materials into new sections, for either overlay or processing and re-use o Earthwork recommendations for site preparation, subgrade preparation, engineered fill, and compaction o Bedding, backfill, compaction, and moisture requirements for trench bedding and backfill o Pavement recommendations for new flexible and rigid sections o Overlay recommendations Materials available Recommended Materials Specifications P8027SCP006.docx 10 GHD will prepare Drainage Reports and the Storm Water Data Report (SWDR). Elements for the reports include the existing and proposed drainage shed maps, narrative of the drainage conditions prior to and after the project, determination of pre and post runoff quantities and water quality calculations consistent with Caltrans Hydraulic Requirements. The scope includes: Preliminary Drainage Report Drainage Shed Maps (Pre and Post) Determination of Incremental Runoffs Determination of Water Quality Volumes Initial Design Approach Preliminary SWDR Identify Drainage Management Areas Construction SWPPP requirements Post Construction Features Updated Preliminary Drainage Report Response to Preliminary Report, and follow-on drafts, comments Hydraulic Grade Line Calculations Pipes, Culverts and Xxxxxx Final SWDR Response to Preliminary Report, and follow-on drafts, comments Water Quality Elements – sizing and design Storm Water Quality Management Plan GHD will prepare preliminary construction plans and cost estimates for the project’s programmable alternative in accordanc...
Geotechnical Design Report. Consultant will prepare a Geotechnical Design Report summarizing the subsurface conditions, seismic hazards, preliminary design, and construction recommendations. The Geotechnical Report must summarize the field observations, subsurface conditions, laboratory test data, analysis results, construction issues, preliminary geotechnical recommendations for pertinent geotechnical design elements, and recommendations for additional geotechnical explorations if appropriate for final design.
Geotechnical Design Report. A Geotechnical Design Report (GDR) will be prepared to describe the project setting and describe any design features that involve geotechnical investigations and engineering geology. The GDR will be prepared in accordance with the Caltrans Guidelines for Preparing Geotechnical Design Reports (2006). The Engineer will conduct a site specific geotechnical investigation and prepare a report to present recommendations with respect to bridge foundations, pavement structural sections and earthwork. Engineer will perform the following tasks:
a. Review existing data and any monitoring well data from adjacent areas. Reconnoiter the site to observe existing conditions and determine proposed exploration locations.
b. We will prepare a Health and Safety plan for use by field personnel during site investigation activities. The plan will include a map identifying the approximate boring location, boring depth, existing facilities, underground and above ground utilities. The plan will include a tabulation of borings by type, number of samples, sample depths, and summation of borings by type.
c. Drill, log, and sample approximately 68 hollow-stem auger borings with depths ranging from 5 to 70 feet. Two borings for the bridge will be advanced to 70 feet, or until refusal, at the support location. Six borings used for potential sign structures will be drilled to an average depth of 40 feet. The remaining 60 borings for pavement subgrade investigation will be drilled to a depth of 5 feet and spaced at 500 feet intervals at the median along the project alignment. Specific locations and sample depths of proposed borings will be finalized during the field investigation. Typically, samples will be collected at 5 feet intervals using either a Standard Penetration Test (SPT) Sampler or a Modified California Sampler. We assumed that the on-site soils are not contaminated and the borings can be backfilled with soil cuttings. The upper five feet of the borings will be backfilled with grout and surfaced with cold-patched asphalt. Excess cuttings will be spread thinly at the site. Obtaining County encroachment permits and coordination with County inspection staff is assumed. It is assumed that this is a prevailing wage project. It is assumed that traffic control will be needed for the field exploration. Obtaining other permits, or insurance is not considered in the geotechnical scope.
d. Deflection study of the existing pavement sections will be performed.
e. Test soil samples in the la...
