611.3 Concrete Slope Protection - Revision history

Legged1: update links

2023-03-07T22:33:03Z

update links

← Older revision		Revision as of 17:33, 7 March 2023
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	In urban areas, the project core team may decide that concrete slope protection is appropriate for specific aesthetic reasons, as an alternative to rock blanket, under the ends of grade separation structures. Concrete slope protection may be used at other locations where necessary to prevent slope erosion. Concrete slope protection is constructed with a 4 in. (100 mm) thickness under grade separation structures unless otherwise specified on the plans. Thicknesses greater than 4 in. (100 mm) may be specified at other locations. The plans show locations, dimensions and quantities for concrete slope protection. No direct payment will be made for any excavating or for other work necessary in preparing the subgrade, trenching or backfilling for concrete slope protection.		In urban areas, the project core team may decide that concrete slope protection is appropriate for specific aesthetic reasons, as an alternative to rock blanket, under the ends of grade separation structures. Concrete slope protection may be used at other locations where necessary to prevent slope erosion. Concrete slope protection is constructed with a 4 in. (100 mm) thickness under grade separation structures unless otherwise specified on the plans. Thicknesses greater than 4 in. (100 mm) may be specified at other locations. The plans show locations, dimensions and quantities for concrete slope protection. No direct payment will be made for any excavating or for other work necessary in preparing the subgrade, trenching or backfilling for concrete slope protection.

	For details of rock blanket and concrete slope protection layouts at bridge ends, see the four cases identified on [~~http://modot.mo.gov/business/standards_and_specs/documents/60940.pdf Standard Plan 609.40] and shown on on [http~~://www.modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/60940.pdf~~ Standard Plan 609.40] and shown on [~~http~~://www.modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/61160.pdf~~ Standard Plan 611.60].		For details of rock blanket and concrete slope protection layouts at bridge ends, see the four cases identified on [https://www.modot.org/media/16882 Standard Plan 609.40] and shown on [https://www.modot.org/media/16886 Standard Plan 611.60].

	==611.3.2 Construction Inspection (Sec 611.60.3)==		==611.3.2 Construction Inspection (Sec 611.60.3)==

Smithk: /* 611.3.2 Construction Inspection (Sec 611.60.3) */ Per BR, minor correction

2016-09-22T17:35:21Z

611.3.2 Construction Inspection (Sec 611.60.3): Per BR, minor correction

← Older revision		Revision as of 12:35, 22 September 2016
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	==611.3.2 Construction Inspection (Sec 611.60.3)==		==611.3.2 Construction Inspection (Sec 611.60.3)==

	Standard ~~drawing~~ 611.60 details the requirements for building concrete slope protection. The concrete should be cured the same as for concrete pavement except that non-pigmented curing compound is used.		Standard Plan 611.60 details the requirements for building concrete slope protection. The concrete should be cured the same as for concrete pavement except that non-pigmented curing compound is used.

	==611.3.3 Materials Inspection for Sec 611.60==		==611.3.3 Materials Inspection for Sec 611.60==

Smithk: Per BR and DE, revised guidance to match Std Plans for when concrete aprons are required

2015-12-23T18:15:46Z

Per BR and DE, revised guidance to match Std Plans for when concrete aprons are required

← Older revision		Revision as of 13:15, 23 December 2015
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	In urban areas, the project core team may decide that concrete slope protection is appropriate for specific aesthetic reasons, as an alternative to rock blanket, under the ends of grade separation structures. Concrete slope protection may be used at other locations where necessary to prevent slope erosion. Concrete slope protection is constructed with a 4 in. (100 mm) thickness under grade separation structures unless otherwise specified on the plans. Thicknesses greater than 4 in. (100 mm) may be specified at other locations. The plans show locations, dimensions and quantities for concrete slope protection. No direct payment will be made for any excavating or for other work necessary in preparing the subgrade, trenching or backfilling for concrete slope protection.		In urban areas, the project core team may decide that concrete slope protection is appropriate for specific aesthetic reasons, as an alternative to rock blanket, under the ends of grade separation structures. Concrete slope protection may be used at other locations where necessary to prevent slope erosion. Concrete slope protection is constructed with a 4 in. (100 mm) thickness under grade separation structures unless otherwise specified on the plans. Thicknesses greater than 4 in. (100 mm) may be specified at other locations. The plans show locations, dimensions and quantities for concrete slope protection. No direct payment will be made for any excavating or for other work necessary in preparing the subgrade, trenching or backfilling for concrete slope protection.

	~~Concrete~~ slope protection ~~should always be used as an apron adjacent to the~~ bridge ~~wing walls in order to move any scouring away from~~ the ~~walls. [~~[~~image~~:~~611~~.~~3 Photo Conc Slope Prot along wings~~.~~jpg\|right\|300 px]~~]~~Therefore, when rock blanket is used under bridge ends, a sufficient quantity of concrete slope protection with a 4 in. (100 mm) thickness is specified to provide the apron as noted~~ on [http://www.modot.mo.gov/business/standards_and_specs/documents/60940.pdf Standard Plan 609.40] and shown on [http://www.modot.mo.gov/business/standards_and_specs/documents/61160.pdf Standard Plan 611.60].		For details of rock blanket and concrete slope protection layouts at bridge ends, see the four cases identified on [http://modot.mo.gov/business/standards_and_specs/documents/60940.pdf Standard Plan 609.40] and shown on on [http://www.modot.mo.gov/business/standards_and_specs/documents/60940.pdf Standard Plan 609.40] and shown on [http://www.modot.mo.gov/business/standards_and_specs/documents/61160.pdf Standard Plan 611.60].

	==611.3.2 Construction Inspection (Sec 611.60.3)==		==611.3.2 Construction Inspection (Sec 611.60.3)==

EPG-Admin at 16:00, 7 September 2007

2007-09-07T16:00:42Z

New page

==611.3.1 Design==

In urban areas, the project core team may decide that concrete slope protection is appropriate for specific aesthetic reasons, as an alternative to rock blanket, under the ends of grade separation structures. Concrete slope protection may be used at other locations where necessary to prevent slope erosion. Concrete slope protection is constructed with a 4 in. (100 mm) thickness under grade separation structures unless otherwise specified on the plans. Thicknesses greater than 4 in. (100 mm) may be specified at other locations. The plans show locations, dimensions and quantities for concrete slope protection. No direct payment will be made for any excavating or for other work necessary in preparing the subgrade, trenching or backfilling for concrete slope protection.

Concrete slope protection should always be used as an apron adjacent to the bridge wing walls in order to move any scouring away from the walls. [[image:611.3 Photo Conc Slope Prot along wings.jpg|right|300 px]]Therefore, when rock blanket is used under bridge ends, a sufficient quantity of concrete slope protection with a 4 in. (100 mm) thickness is specified to provide the apron as noted on [http://www.modot.mo.gov/business/standards_and_specs/documents/60940.pdf Standard Plan 609.40] and shown on [http://www.modot.mo.gov/business/standards_and_specs/documents/61160.pdf Standard Plan 611.60].

==611.3.2 Construction Inspection (Sec 611.60.3)==

Standard drawing 611.60 details the requirements for building concrete slope protection. The concrete should be cured the same as for concrete pavement except that non-pigmented curing compound is used.

==611.3.3 Materials Inspection for Sec 611.60==

The Materials Division does not normally perform field inspection on this item.

==611.3.4 Bridge Maintenance==

===611.3.4.1 Purpose===
To prevent erosion around wings and under abutments by maintaining adequate drainage away from the ends of the bridge.

===611.3.4.2 Scheduling===
Anytime that work can be accomplished.

===611.3.4.3 Procedures===
1. Fill any erosion from failed mat gutters as necessary. Fill areas under and around wings as necessary.

2. Repair mat gutter as needed with bituminous mix to create an adequate trough to carry water away from the wings. Preferably, the drainage should go away from the roadway and down the slope and not back under the bridge.

3. Seal the mat gutter with liquid asphalt to create a watertight surface.

4. If the mat gutter goes along the wing down to paved slope protection, ensure the water is diverted onto the paved slope so the paved slope is not undermined. Stop water from going into the top joint of the paved slope along the abutment.

[[Category:611 Embankment Protection]]