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- W647223854 abstract "THE TUNNEL CONTRACTOR MUST REALIZE THAT TUNNEL PROGRESS IS DIRECTLY AFFECTED BY THE MATERIAL BEING EXCAVATED. THEREFORE, GROUND CONDITIONS NOT ONLY AFFECT THE RATE AND COSTS OF EXCAVATION, ITSELF, BUT HAVE A DIRECT EFFECT UPON OTHER FEATURES OF ASPECTS OF THE PROJECT, SUCH AS: TUNNEL SUPPORTS; OVERBREAK; USE OF EXPENDABLES---POWDER, DRILL BITS, STEEL; USE OF EQUIPMENT; AMOUNT OF TUNNEL LINING, INCLUDING GROUT; AND METHOD OF ADVANCING THE TUNNEL. FURTHERMORE, DESIGN CONSIDERATIONS AND CONTRACT TYPE MUST BE DECIDED BY THE CONTRACTOR IN CONJUNCTION WITH THE OWNER AND THE ENGINEER. SOME OF THE CONTRACT TYPES AVAILABLE ARE: (1) FIRM FIXED PRICE CONTRACT IN WHICH THE CONTRACTOR ASSUMES FINAL RESPONSIBILITY IN THE FORM OF PROFITS OR LOSSES FOR ALL COSTS UNDER OR OVER THE FIRM FIXED PRICE (HENCE THE NAME). (2) FIXED PRICE CONTRACT WITH ESCALATION CLAUSES (EITHER PRICE AND/OR LABOR OR MATERIALS) PROVIDES FOR UPWARD AND DOWNWARD REVISIONS OF A STATED PRICE IF CERTAIN, SPECIFIED CONDITIONS OCCUR. (3) FIXED PRICE INCENTIVE CONTRACT PROVIDES FOR PRICE ADJUSTMENT AND THE ESTABLISHMENT OF THE FINAL CONTRACT PRICE BY USING A FORMULA BASED ON THE RELATIONSHIP BETWEEN THE FINAL NEGOTIATED TOTAL COST AND THE TOTAL PROJECTED COST. (4) COST PLUS A FIXED FEE CONTRACT PROVIDES FOR THE PAYMENT OF A FIXED FEE TO THE CONTRACTOR WHICH, WHEN NEGOTIATED, DOES NOT VARY WITH ACTUAL COSTS BUT MAY BE ADJUSTED IF WORK OR SERVICE CONDITIONS, PERFORMED UNDER THE CONTRACT, CHANGE. DECISIONS AS TO WHETHER CONTRACTS WILL BE SUBJECT TO OPEN BIDDING, RESTRICTED BIDDING, OR NEGOTIATED BIDDING ARE OFTEN MADE BY THE OWNER. USUALLY UNIT PRICING, BASED UPON VARIATIONS IN AVAILABILITY OF MATERIALS AND WORK CONDITIONS, RATHER THAN LUMP SUM PRICING IS ADHERED TO." @default.
- W647223854 created "2016-06-24" @default.
- W647223854 creator A5060929988 @default.
- W647223854 date "1972-06-01" @default.
- W647223854 modified "2023-09-26" @default.
- W647223854 title "OWNER-ENGINEER-CONTRACTOR RELATIONSHIPS IN TUNNELING - A CONTRACTOR'S VIEWPOINT" @default.
- W647223854 hasPublicationYear "1972" @default.
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