Civil Earthwork - Shoring of Excavation (SOE), Soil Improvement - Design and Construction (Design-Build)

CPV codes

Description

1. Bechtel Polska seeks qualified experienced subcontractors for major civil earthwork specific to the major excavations required for power plant structures. This work involves shoring of excavation (SOE) for power plant power block structure foundations, advanced to significant depth exceeding 30m in complex ground conditions that include water bearing sand and artesian groundwater pressure. Other main power-plant structure excavations include shoring walls to be used as portals for seaward tunnels supplying/discharging cooling water for the power plant, and deep seepage cut-off walls in excess of 40m. The SOE work is to be performed at the project location for the Poland Nuclear Power Plant. Associated soil improvement (SI) required as part of the SOE system, tunnel boring machine launch and other soil improvement necessary to support loads adjacent to the excavation is also included. The work will be design-build requiring engineering design of shoring walls and soil improvement to required codes and standards, and upon approval of design, construction of the shoring system for several main power-plant structures. The scope of work includes, but is not limited to: • Design of shoring walls. Design will be in accordance with the codes and standards identified in the tender package. • Preparation of detailed construction drawings for the shoring system/soil improvement submitted for: o Approval by Bechtel Polska o Permit application/acquisition o Coordination with Owner and Permit/Regulator Authority • Preparation of submittals for approval of proposed materials, and of construction means and methods o Submittal of execution plan and schedule meeting the overall project schedule • Preparation of shop drawings as required for approvals and material fabrication/procurement • Procurement of required materials for construction of the shoring system/soil improvement • Construction of the shoring system/soil improvement in the field in accordance with: o Bechtel Polska’s requirements for subcontractors performing work on the project site, including the project safety plan and requirements regarding work hours o Subcontractor’s approved safety plan o Subcontractor’s approved quality plan o Coordination with and direction from Bechtel Polska in the field o Coordination with other subcontractors performing related work on excavation, backfilling, dewatering, and tunneling • Construction work for the SOE will require survey-layout of the work, and the other requirements as established by the work scope in the tender package, e.g. conformance with the site plan for construction stormwater/erosion-sediment control • Instrumentation and Monitoring- Shoring walls will include instrumentation for monitoring of movements during excavation. The tender package will include details on requirements for such instrumentation, e.g. inclinometers, vibrating wire piezometers to be installed in the shoring wall Design-build of the shoring/soil improvement works includes providing all required tools, equipment, labor, supervision, technical and professional services, materials, consumables, and supplies required to complete required excavation shoring/soil improvement. The detailed scope of work will be outlined in the tender package documents, including technical specifications, geotechnical data for use in design, and other contractual materials provided to the Company. Details such as environmental controls/requirements/restrictions, site access, laydown space, construction water/power, job trailer accommodation will be addressed in the tender package. Interested parties shall have documented, proven experience in successful design-build SOE/SI work on large projects in difficult ground conditions. Subcontractors that will be considered must demonstrate ability to provide equipment and crews of sufficient type and number; and proven experience with all required quality, safety and execution documentation related to completion of the work. Interested companies must register/update their Company's information in Bechtel's iSupplier portal at https://supplier.becpsn.com link and select Commodity Code CE00 as their specific area of interest. Bechtel shall provide the interested party the Poland Prequalification Questionnaire where interested party would complete with response to Bechtel for review. Bechtel notes that previous proven work of similar scale and complexity (which includes completion of comparable design-build of SOE/SI in complex ground conditions) will be mandatory. Pre-qualification will include evaluation of bidders’ comparable experience on previous similar projects. Bechtel notes that previous proven work of similar scale and complexity (which includes completion of comparable design-build of SOE/SI in complex ground conditions) will be mandatory. Pre-qualification will include evaluation of bidders’ comparable experience on previous similar projects. The prequalification questionnaire includes a list of questions required to be considered as prequalified, and examples to include demonstration of (i) experience in furnishing SOE/SI design-build scope in the past or current projects which is equivalent or equal to the complexity of the Poland AP 1000 project, (ii) availability of new or like new rig equipment in performance of scope, (iii) acceptable safety record and compliance to quality requirements including current ISO 9001 certification, (v) compliance to certification of legally mandatory requirements, (vi) financial standing (solvency), and (vii) organizational capabilities.

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