Service Life Of Drainage Pipe

Service Life of Drainage Pipe PDF
Author: Lester H. Gabriel
Publisher: Transportation Research Board
ISBN: 9780309061117
Size: 35.79 MB
Format: PDF
Category : Culverts
Languages : en
Pages : 39
View: 1597

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"The synthesis describes the current state of the practice regarding state transportation agency standards and strategies that determine and define the service life of drainage pipe. Information for the synthesis was collected by surveying state transportation agencies and by conducting a literature search."--Avant-propos.

Synthesis Of Highway Practice

Synthesis of Highway Practice PDF
Author: National Cooperative Highway Research Program
Publisher:
ISBN:
Size: 72.23 MB
Format: PDF, Mobi
Category : Highway engineering
Languages : en
Pages : 56
View: 3839

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Evaluation Of Service Life Of Noise Barrier Walls In Illinois

Evaluation of Service Life of Noise Barrier Walls in Illinois PDF
Author: Dianne H. Kay
Publisher:
ISBN:
Size: 22.93 MB
Format: PDF, Mobi
Category : Life cycle costing
Languages : en
Pages :
View: 6329

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The scope of this project included: development of a means to quantify the service lives of materials used for construction of noise barriers in Illinois; development of a life cycle cost model for the evaluation of alternative materials; and evaluation of the need for potential changes to the Special Provisions for noise barrier construction currently used in Illinois. The project included a survey of all state departments of transportation (DOTs) to develop information on experiences with noise barrier materials and products, which showed that nationwide, less than 1% of noise barriers by length have been repaired or replaced, and that few DOTs use life cycle cost analysis for selection of noise barriers. A comprehensive list of the materials currently approved for use in Illinois by the Illinois Highway Development Council was developed. The current condition of existing Illinois noise barriers was assessed by field observation, and Illinois Department of Transportation (IDOT) maintenance personnel were surveyed to develop information on maintenance histories, costs of repairs, scheduled repair or replacement of barriers, and estimated service lives of barriers in place. Service life criteria were developed considering the structural, acoustical, and aesthetic functions of noise barriers. A life cycle cost model was developed and the relative life cycle costs of existing Illinois noise barriers were computed. Noise barrier specifications supplied by IDOT and the Illinois State Toll Highway Authority were reviewed, and recommendations for improving the organization and content of the specifications were made.

Life Cycle Cost For Drainage Structures

Life Cycle Cost for Drainage Structures PDF
Author: John C. Potter
Publisher:
ISBN:
Size: 70.39 MB
Format: PDF, ePub, Docs
Category : Drainage
Languages : en
Pages : 68
View: 5278

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Principal factors involved in the design of drainage structures include hydrology, soil conditions, material strength, material durability, cost, and type of facility being drained. Although not necessarily overriding, the cost is often one of the most important factors. This cost should be the total, overall cost of the alternative over its projected life or life cycle cost (LCC). Unless the LCC is considered over first cost, the owner cannot be assured of receiving maximum value for his construction and maintenance dollars. Except for determining a service life for the various types (materials) of drainage structures, the procedures for LCC analysis are well established. LCC based economic studies are an integral part of the complete design process and are a requirement specified in Technical Manual 5-802-1. AR 11-28/AFR 178-1 gives the basic criteria and standards for economic studies by and for the Departments of the Army and Air Force. The guidelines presented in Part II of this report can be used to estimate the service life of a particular design or ensure a 50-year service life. Thus, the procedures for economic analysis described in Technical Manual 5-802-1 can be used to determine LCC. The alternatives can then be order ranked based on LCC, and the best design can be rationally and confidently selected.