You can search the publications of more than 60 of the industrys major publishers. Deck drainage impacts are to be considered at the bridge conceptual design. The design criteria in this document shall be used for the new or reconstructed portions of facilities. Chapter 15 structural design requirements for designbuild. Section 5 bridge decks new york state department of. Roads will affect the natural surface and subsurface drainage pattern of a watershed or individual hillslope. Bridge construction standards bridge drainage author. Surface and subsurface bridge deck drainage solutions the only typei d400 bridge drainage product. A bridge deck gutter is defined in this manual as the section of pavement next to the curb or parapet that conveys water during a storm runoff. From a hydraulic point of view, inlets should be large and widely separated.
Massdot issues guides and manuals for use by our project designers. Quantity and quality of runoff should be maintained as required by applicable stormwater regulations. The scope of this chapter is limited to the drainage design responsibilities of the project development section. The manual also stresses the advantages of designing to minimize the complexity of bridge deck drainage systems. Drainage design manual march 2019 2 illinois tollway widening or lane addition projects. Drainage design of existing facilities shall not be modified unless a flooding problem is identified or if the existing design is incompatible. It is not intended to replace the aashto lrfd bridge design specifications or any other design guide or regulatory code. Finally, a complete design of the bridge including girders, columns, abutments and the deck was created. The goal is a design that is the most costefficient while still satisfying the criterion described below. Some highway runoff is treated by structural or nonstructural systems best management practices. Results by applying this innovative bridge drainage. Identify if there are bridge or culvert structures upstream or downstream including their configuration and distance from the proposed structure. The bridge drainage systems covered in this section includes the bridge deck gutter, drainage. Bridge deck drainage systems are to be designed to accommodate runoff using the design criteria for rainfall intensities and spread of gutter flow set forth in table 1.
Bridge deck site for all rainfall events monitored, loop 289, lubbock. Design of bridge deck drainage, hydraulic engineering circular no. Local pooling of drainage water for extended durations on the bridge deck. Bridge deck drainage roadway and bridge deck profiles shall be adjusted as much as possible to avoid having bridge drains on the bridge. Characterization of stormwater runoff from a bridge deck and. For example, inlets for a reinforced concrete bridge deck must fit within the reinforcingbars layout. Where drainage facilities are needed, the preferred design is to capture the runoff with inlets at the ends of the bridge. The drainage design manual dated march 2019 replaces the previous version dated march 2018. Refer to chapter three of the bridge design manual for information on drainage design for. Fastflow bridge deck drainage provides a complete drainage solution for both bridges and standard. Best practices do not override design frequency and allowable spread criteria.
Ideally the road alignment should have a continuous fall from one abutment to the other. New bridge design information is continually developing. Bridge design bridge design books for bs 5400 and eurocodes. Identify impact of the other structures on the design criteria for the crossing being considered. Scuppers are the recommended method of deck drainage because they can reduce the problems of.
Specific design practices that can reduce the need for bridge storm drain systems and improve deck drainage performance include. Hydraulic performance of small scale bridge deck drains. Hydraulic structures are typically designed for high flow events, although specific projects may also have low flow criteria. In considering a costefficient drainage design, the initial cost should be considered, but facility longevity and future maintenance costs and legal and environmental constraints should. The intent is to provide guidance as well as an interpretation of aashto lrfd bridge design specifications specific to new mexico bridge design.
Such design ideas as making it a onespan bridge and what material to use in construction, prestressed concrete or steel, were further investigated. Pdf 241 kb issue applicability to this project is it documented comments. The selection and proper application of the component design and any modifications shown. Hydraulic design frequency and design criteria are based on federal and state laws and regulations, safe operation of the highway facility and impact to adjacent property owners. Four inch diameter scuppers spaced on five foot center maximum shall provide deck drainage for a normal crowned section with eight to ten foot shoulders. When bridges are placed at a vertical curve and the longitudinal slope is less than 1 percent, the gutter spread should be checked to ensure a safe, reasonable design. To address drainage and hydrology considerations in highway design and corridor management, the ministry of transportation mto has developed a number of documents and tools. A vital part of a bridge design is the drainage system. Weve got the knowhow to help you find the right answers. The primary reason for a good bridge deck drainage design is to provide for safe passage of vehicles during the design storm event. Revised the minimum width on either side of the restrictor plate. Added load rating is required when a new feature is added to a bridge that increases or redistributes the existing permanent loads on a bridge. The bridge design engineer shall ensure that this runoff would not cause any erosion near the abutment fill. To address drainage and hydrology considerations in highway design and corridor management, the ministry of transportation.
Aashto lrfd bridge design specifications specific to new mexico bridge design practice so that uniformity in bridge design procedures will be attained. Hambly covers methods of analysis of various types of bridge decks. Also decks should be made integral with the abutments to avoid any joints in the carriageway. The design of drainage structures is based on the sciences of hydrology and hydraulicsthe former deals with the occurrence and form of water in the natural environment precipitation, streamflow, soil moisture, etc. Bridge standard detail sheets change transmittal pdf summary of revisions pdf support. An inlet is a common location for debris to collect and potentially clog a drainage system. Road drainage design has as its basic objective the reduction andor elimination of energy generated by flowing water. Updates and additions to the manual will be on an as needed basis. Identify existing drainage problems of other bridge structures upstream or downstream. Bridge deck drainage shall be allowed to fall freely to the ground through deck scuppers unless otherwise directed by the bridge engineer. Likewise, where catch basins are used, the outlet from the basins shall be designed to properly discharge to the wash. Added statement indicating existing cmp pipes shall be replaced.
Produced in any size to suit your design and compliant at point of purchase 100% recyclable. Federal highway administration, urban drainage design manual. Bridge deck inlets go to chapter 6 the design of the bridge deck inlet is important because it removes water from a bridge deck within the limits of allowable spread. As spread of water from the curb increases, the risks of traffic accidents and delays, and the nuisance and possible hazard to pedestrian traffic increases. Envirodeck and envirobridge are simple and effective bridge drainage systems with advantages both during construction and throughout the lifetime of the bridge. Federal highway administration, design of bridge deck drainage, hydraulic engineering circular no. Fastflow bridge deck drainage systems expansion joints. The bridge design detailing manual guidelines listed below are developed and maintained by the structure design detailing technical committee within the division of engineering services des. These standard guidelines, examples and checklists assist engineers and detailers to produce preliminary design studies, contract plans and other detailing related standards. Any size and type can be produced with any combination of width, depth, upstand and profile. Characterization of stormwater runoff from a bridge deck. Technical details of the assessment process are included in the appendix. In addition, removal of deck drainage prior to the bridge end will reduce water damage attributed to leaky joints and undermining of bridge approaches. The section responsible for design of the drainage structure shall also design the related stream bank stabilization and erosion control.
Should the design process indicate a drainage system is needed, utilization of the most hydraulically efficient and. The following is the bridge deck drainage document referred to in the manual bdm. The current practice for bridge deck drainage assessment is formally accepted as the departments best practice. Fastflow is produced at our uk foundry and offers effective drainage systems, catering for both surface and subsurface bridge drainage. If decks cannot be made integral then the fixed abutment should be positioned at the low end to minimise any surface. This manual is intended to provide general guidance, and not solutions that are specific to any project. Where it is necessary to intercept deck drainage at intermediate points along the bridge, the design of interceptors shall conform to hec21 procedures. Appendix e bridge deck drainage calculations appendix f mot drainage calculations appendix g cost calculations appendix h correspondence and report excerpts such as existing bridge plans, bridge inspection reports, flood insurance study, original fema model, hydrology and hydraulic reports from other sources. Design of bridge deck drainage fhwa us department of. Care should be taken to maintain these grades during any resurfacing operations.
When deck drainage interceptors are needed, a storm sewer collection system will be necessary to discharge. All warranties and representations of any kind with regard to said documents are disclaimed, including the implied warranties of merchantability and fitness for a particular use. The joint gap width will vary where the joint is designed to accommodate thermal and other movements. Compare actual location to initial assumption and verify that assumption is. The details may be incorporated into either the district or the structure plans. Revised reference to the tollway drainage design manual from section 10.
In considering a costefficient drainage design, the initial cost should be considered, but facility longevity and future maintenance costs and legal and environmental constraints should be considered also. The locations of deck slab drainage inlets shall be shown on the deck slab plan sheet of the bridge plans. A fraction of this pollution is conveyed to receiving waters by stormwater drainage from highways. Composite design provides an advantage in reducing the necessary section of primary members and also serves to. Composite design provides an advantage in reducing the necessary section of primary members and also serves to significantly stiff en the bridge. Deck drainage impacts are to be considered at the bridge conceptual design stage to minimize the potential for deck drainage issues while there is still room for. Virginia department of transportation, drainage manual, april 2002. Proper drainage increases safety and prolongs the lifetime of the bridge. The minimum desirable longitudinal slope for bridge deck drainage should be 1 percent. Many short, singlespan bridges do not require drainage facilities. Bridge design details 116, use of bridge standard details xs. The washington state department of transportation wsdot makes these documents available on an as is basis.
Bookshops and online links for bridge design books and manuals eurocode design guides for bridges. If bridge geometry is such that drains are required, the number of drains should be minimized as much as possible while still providing a bridge deck drainage design that meets required standards. This means that our units have been proven to withstand the d400 load test without the need for concrete haunching to achieve structural strength. The only product that is compliant at the point of purchase. If decks cannot be made integral then the fixed abutment should be positioned at the low end to minimise any surface water leakage through the deck. Secondly, it is to minimize the amount of flow over the joints at the ends of the bridge.
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