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«3.0 TEMPORARY DETOUR BRIDGES Table of Contents 3.1 General 3.2 STORAGE SITES: 3.3 BID ITEMS: 3.4 INDEX OF PLAN SHEETS with H-Pile: 3.5 INVENTORY ...»

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Kansas Department of Transportation Bridge Construction Manual

3.0 TEMPORARY DETOUR BRIDGES

Table of Contents

3.1 General

3.2 STORAGE SITES:

3.3 BID ITEMS:

3.4 INDEX OF PLAN SHEETS with H-Pile:

3.5 INVENTORY SHEET FOR DETOUR BRIDGES WITH H-PILE:

3.5.1 COLUMN HEADINGS:

3.5.2 LINE ITEMS:

Version 1/07 KDOT Bridge Section 3.0 - Temporary Detour Bridges - i Kansas Department of Transportation Bridge Construction Manual Disclaimer: This website and documents are provided for use by persons outside of the Kansas Department of Transportation as information only. The Kansas Department of Transportation, the State of Kansas, nor its officers or employees, by making this website and documents available for use by persons outside of KDOT, does not undertake any duties or responsibilities of any such person or entity who chooses to use this website and documents. This website and documents should not be substituted for the exercise of a person’s own professional judgment nor the determination by contractors of the appropriate manner and method of construction on projects under their control. It is the user’s obligation to make sure that he/she uses the appropriate practices. Any person using this website and documents agrees that KDOT will not be liable for any commercial loss; inconvenience; loss of use, time, data, goodwill, revenues, profits, or savings; or any other special, incidental, indirect, or consequential damages in any way related to or arising from use of this website and documents.

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Version 1/07 KDOT Bridge Section 3.0 -Temporary Detour Bridges - ii Kansas Department of Transportation Bridge Construction Manual

3.0 TEMPORARY DETOUR BRIDGES3.1 General A bridge replacement or substantial repair usually impedes existing traffic patterns. To maintain traffic through or around the bridge site, the options are to (1) detour on other state routes, (2) carry traffic on an offset alignment, (3) carry traffic through the site with stage construction, or (4) construct a shoo-fly. A shoo-fly crossing a stream will require a temporary span bridge if the hydraulic requirements are greater than what pipes can provide.

A temporary span bridge used in a shoo-fly detour will be referred to throughout this chapter as a Detour Bridge. KDOT has an inventory of 14 Detour Bridge spans. When not in use, they are stockpiled at selected storage sites throughout the state. A Detour Bridge has a total deck width of 30'-6" and a roadway of 28'-0". Each Detour Bridge span has a total end to end length of 69'-0".

Single span or multiple simple span Detour Bridges may be constructed, depending upon the waterway opening required.

The plan details are developed for Detour Bridges to be placed on tangent alignment and at zero percent grade.

Detour Bridges vary as follows:

• The method of attaching the deck panels.

• The backwall option selected by the Contractor.

• The pile type required.

There are two types of deck panels, the "K" and the "N". Each type has a different method of attaching to the steel rolled beam girders. Steel H-piles are used at the abutments and piers if the piles are driven to point bearing in the underlying geology. Concrete piles are used as friction pile, when point bearing cannot be achieved. The two pile types require different details for constructing the abutments and piers. A multi-span detour bridge may consist of "K" panels and "N" panels. It is possible to use both "K" and "N" panels in a single span, but only if that span has girders for "K" panels. It is recommended that only one panel type be used per span.

3.2 STORAGE SITES:

A storage site is used for the stockpiling of detour bridge parts when a project is completed and the Detour Bridge is dismantled and transported from the construction site. The KDOT Area Engineer from the area in which the project is constructed selects the storage site. Prior to finalizing the design plans, the Area Engineer should inform the Bridge Design Squad Leader of the storage site location. This should be done during or shortly after the field check. Storage site locations have varied from cold mix strips to maintenance yards. Storage site locations are listed in the Transportation Note on the General Notes Sheet and on the Inventory Sheet. If the final storage location changes from the site listed in the plans, notify KDOT Bureau of Design, Attention: Gary Chan.

<

–  –  –

At the beginning of a project, the Contractor receives the Detour Bridge parts from the storage sites listed in the plans. The Detour Bridge manager selects these sites based upon their proximity to the construction site. More than one receiving site may be listed due to the number of Detour Bridge spans required and the distribution of these spans throughout the various storage sites.

These sites are also listed in the Transportation Note on the General Notes Sheet and on the Inventory Sheet.

3.3 BID ITEMS:

The two bid items used in the plans for Detour Bridges are as follows:

• "Erection and Removal of Rolled Beam Detour Bridge".

• "Furnish Rolled Beam Detour Bridge".





The Lump Sum bid item, Erection and Removal of Rolled Beam Detour Bridge is used for every

Detour Bridge application. This bid item consists of the following:

• Conducting the pre-construction inventory.

• Loading and unloading the bridge parts from the storage and construction sites to the transporting vehicle.

• Transporting these parts between sites.

• Preparing the Detour Bridge site.

• Erecting or constructing the Detour Bridge.

• Maintaining the bridge during the service life of the project.

• Repairing damaged galvanized coatings as directed by the Engineer.

• Dismantling the bridge upon completion of the project.

• Conducting the post-construction inventory.

• Providing all labor, tools, equipment and incidentals necessary to complete the work.

All replacement parts and other items listed in Column 4 ("Refit Rolled Beam Detour Bridge") of the Inventory Sheet are subsidiary to this bid item. The Lump Sum bid item, "Furnish Rolled Beam Detour Bridge" consists of Contractor furnished Detour Bridge parts. These parts are for one or more complete bridge spans that are required when the need exceeds the existing inventory. The parts furnished are listed in Column No. 5 of the Inventory Sheet.

3.4 INDEX OF PLAN SHEETS with H-Pile:

–  –  –

The sequence of detail sheets as they appear in the plans is:

1. General Notes

2. Construction Layout a. The Lump Sum Bid Items are listed on this sheet.

3. Geology Sheet This information is included only if the geological formations at the site vary in thickness, type and elevation. If the formations are uniform and predictable, this sheet is not included and the required pile lengths are based on the geological profile for the mainline bridge replacement.

4. Inventory Sheet

5. Optional Abutment Details The Contractor can select one of two available methods of constructing the abutment backwall.

Most Contractors prefer Option "B".

6. Substructure Details

7. Bearing Device Details

8. Framing Plan and Diaphragm Details

9. K-Connection of Deck Panels

10. N-Connection of Deck Panels

11. Safely Barrier Curb, Precast

–  –  –

3.5 INVENTORY SHEET FOR DETOUR BRIDGES WITH HPILE:

The Inventory Sheet, as the name implies, is simply a record of the parts required to construct the Detour Bridge. The Design Engineer is responsible for recording all of the information in Columns 2 through 5. After the project is Let, the Construction Engineer is responsible for recording all of the information in Columns 6 through 10. The name of the Construction Engineer who conducts the pre-construction and post-construction inventories, and the date of the post-construction inventory, is to be recorded at the top of the sheet.

The Construction Engineer is required to send a completed copy of the Inventory Sheet, which

includes the pre-construction and post-construction inventories, to:

Gary Chan, P.E.

KDOT Bureau of Design 13th Floor - Dwight D.

Eisenhower State Office Building Topeka, KS 66603 3.5.1 COLUMN HEADINGS:

An explanation of the Column Headings is as follows.

3.5.2 LINE ITEMS:

Comments of the Line Items are as follows:

1. Pre-Drilled Pile Holes:

Pre-drilled pile holes are required only when detailed on the Construction Layout and/or Geology Details sheet and listed on the Inventory sheet in Line Item No. 1. They are used only in conjunction with H-pile. (See Detail No. 1) After pre-drilling the hole and inserting the H-pile, the pile will be driven to refusal. Temporary casing may be required to support the hole prior to backfilling. Backfill the bottom 2'-6" +/- 3" of the hole with commercial grade concrete. Backfill the remainder of the hole with sand. The quantity of pre-drilled pile holes, in linear feet, is listed in Column 4, "Refit Rolled Beam Detour Bridge" and is subsidiary to the bid item, "Erection and Removal of Rolled Beam Detour Bridges". It includes all drilling or auguring, backfill material, and all labor, tools, equipment and incidentals necessary to complete the work

–  –  –

2. Support Bracing:

See the Substructure Details sheet for H-Pile for support bracing requirements. Support bracing of piling at the piers is required to prevent lateral buckling (failure) of the piles about their weak axis. It shall be supplied and installed as required by plan details. The quantity is listed "as required" in Column 4 and is subsidiary to the bid item, "Erect and Remove Rolled Beam Detour Bridge".

3. Steel Pile (HP 10x42):

Drive the steel pile to bearing at the stations detailed on the Construction Layout Sheet. The piles are located directly below the ends of the beams and the bearing devices. There are six pile (six girder lines) at each pier and eight pile (six girder lines and one at each wingwall) at each abutment.

The bearing device plates are bolted to pre-drilled steel channel caps which are bolted to the pile flanges. (See Detail No. 2)

–  –  –

Therefore, extra effort must be taken by the Contractor to obtain proper alignment, spacing and relative location of all pile in the abutment and pier pile groups. This may require forcing the tops of the piles in alignment and spacing after the piles have been driven to point bearing.

There is only one pile per wingwall. Wingwall pile are a maximum of 25' long and are not driven to bearing. Their only function is to resist the lateral soil pressures on the wingwalls created by the approach embankments.

Piling remains the property of the Contractor. It may be salvaged by total removal, removed to a minimum of 1' below finished ground line, or removed to a depth as stated in the plans. The required pile lengths are shown on the Construction Layout sheet and listed on the Inventory Sheet. Steel pile quantities are listed in Column 4 and are subsidiary to the bid item "Erect and Remove Rolled Beam Detour Bridge".

4. Abutment Caps and Pier Caps:

The C15x40 channels are the pier and abutment caps, which receive the reactions from the bearing device plates and transfer those reactions to the piling. The channels are fabricated with bolt

–  –  –

holes for attachment of the bearing device plates and for attachment to the pile flanges.

(See Detail No. 2).

Once the channels have been positioned to correct elevation and held firmly in place, field drill bolt holes are through the steel pile flanges. The bolt hole pattern in the channels is used as a template for the field drilling.

KDOT's early Detour Bridges had two steel H-pile at each abutment wingwall. The abutment channel caps from these early bridges have ten bolt hole patterns for attachment to ten abutment piling. However, the current design uses only one pile per wingwall for a total of eight pile per abutment. The first interior bolt hole pattern from each end of an abutment channel that has a total of ten bolt hole patterns should be ignored.

All abutment channels are interchangeable - any abutment channel can be used at either abutment for any bridge. All pier channels are interchangeable - any pier channel can be used at any pier for any bridge.

5. Bearing Plate with Anchor Studs:

The bearing plates are interchangeable. They can be used at the abutments or at the piers.

(See Details No. 3 and No.4).

6. Rocker Plates:

The rocker plates are interchangeable. They can be used at the abutments or at the piers. The rocker plates are not to be removed from the rolled beams when the Detour Bridge is disassembled at the end of a project. They are stockpiled at a storage site still attached to the beams with the drill and tap bolts. (See Detail No. 3 and 4)

–  –  –

7. Timber:

Timber is used in construction of the abutment backwalls. The timber supplied by the Contractor shall be full size but is not required to be treated. The timber shall remain the property of the

–  –  –

Contractor after the project is completed. Timber listed in column 1 of the Inventory sheet is for both abutment backwalls.

8. Options A and B:

The required number of timber items, which are listed in Column 2 of the Inventory sheet, are based on abutment option B, which seems to be the preference of the Contractors.

(See Detail No. 5).

8. Precast Concrete Safety Barriers, Interior and End Units:



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