Keep records up to date. 463 0 obj << /Linearized 1 /O 465 /H [ 928 1116 ] /L 999132 /E 15929 /N 109 /T 989753 >> endobj xref 463 26 0000000016 00000 n Information reported to the hotline in the past has helped to eliminate certain fraudulent activities and protect State resources. Before construction of any type of slope protection, review the plans, Standard Specifications, special provisions, any pertinent preliminary test data, and the location of the installation. The method for placing rock will either be Method A or Method B, whichever the contract designates, as discussed under Section 4-7203A, Rock Slope Protection, earlier in this section. Review the plans for the location and number of weep holes. Copies of these details are made available below in both Adobe Portable Document Format (PDF) and AUTOCAD Drawing (DWG) file formats. The contract plans will designate the required rock layer thickness for each location. Please enable JavaScript in your browser. 0000007029 00000 n endobj They are designed to protect against raveling-type rockfall that involves small-volume slope failures (up to about 7.6 m3 or 10 yd3) or blocks up to 1.5 m (5 ft), depending on the strength of the mesh used (Muhunthan et al. For details about concrete production, review Section 4-90, Concrete, of this manual. Broken-concrete slope protection consists of placing broken concrete from job site locations identified within the contract. +NXR!ft]l|\P2. Take care not to tear the filter fabric during installation. C-15 Permeable rock jetties (fish habitat structures) C-8 C-16 Close-up of permeable rock jetty C-8 C-17 RSP tied to solid rock outcrop, natural impermeable retard (jetty) C-9 C-18 Soil-filled voids, natural vegetation C-9 C-19 Channel cut through deposited beach sand C-10 C-20 Layers of deposited sand C-10 Angular shaped rock may be used on any planned slope. Flat or needle shaped rock must not be used unless the individual rock thickness is greater than 0.33 times the length. Observe construction to ensure the contractor does the placing, finishing, and curing as specified. Mirafi N-Series Product Description Sheet. Weight will vary based on density of rock available for the project. Rock mesh slope protection is a technique to control rockfalls . When exposed aggregate slope paving is specified, ensure any concrete set retarders are used in accordance with manufacturer instructions. The Difference Mirafi N-Series Nonwoven Geotextiles Make: The placement of a flexible, porous geotextile between dissimilar materials so that the integrity and intended functions of both materials remain intact or are improved. rock slope protection (3/8 t, class vi, method b) (ton) 723060 rock slope protection (300 lb, class iv, method b) (cy) . This translates to a 0.75H: 1V incline and is shown below. 4-7203C Small-Rock Slope Protection The small-rock slope protection method consists of excavating and backfilling the footing trench, placing rock slope protection fabric as shown, and placing small rocks on the slope. Observe closely during rock placement to detect any damage to the fabric. 0000007052 00000 n The devices include ground covers and channel liners such as: 1. Neoloy Tough-Cells in slopes prevent erosion, enable drainage and stabilize the slope to provide a green surface cover. endobj are available to meet BABA (Build America, Buy America) requirements. Close observation is required during rock placement to detect any damage to the fabric. There are three material gra requirements based on required rock layer dation thicknesses. Caltrans requires the use of these new RSP gradations starting August 1st, 2016 in new projects and those not yet at 30 percent PS&E stage. Draw Down Device, Temporary Access Bridge (1 of 2, PDF only), Temporary Access Bridge(2 of 2, PDF only), Temporary Access Culvert (1 of 2, PDF only), Temporary Access Culvert (2 of 2, PDF only), Onsite Concrete Washout Structure (1 of 2, PDF only), Onsite Concrete Washout Structure (2 of 2, PDF only), If you are experiencing difficulty accessing these details or if there are anyquestions, please contact the Sediment, Stormwater & Dam Safety Program at (410) 537-3543 or by email (Amanda.Malcolm@maryland.gov, National Human Trafficking Hotline - 24/7 Confidential. 3. endobj Obtain rock samples for acceptance tests. Your search for great running gear starts and ends with us. When shotcrete is to be used, review Section 4-53, Shotcrete, of this manual. Method A is used where the stability of the rock slope protection is considerably dependent on the manner in which the individual rocks are placed. Testing must follow the frequencies shown in Section 6-1, Sample Types and Frequencies, of this manual. This article studies the mechanical properties and stability of CC slope protection by comparing it with conventional material (shotcrete). Please enable scripts and reload this page. The plans will designate which type applies at each location. Fabric Class Class Largest rock gradation class used in slope protection 8 Classes I-VIII 10 Classes IX-XI Replace the 1st paragraph of section 73-3.028 with: Rocks for concreted-rock slope protection must comply with the gradation shown in the following table: Concreted-Rock Gradation . Rock Slope Protection practice is intended for slopes too unstable for revegetation practices alone. Class E Revetment Erosion Stone or Class E Revetment Erosion Stone or A A Engineering Fabric Ditch Bottom 2' 2' Anchor Slot W 6'' min. Flat or needle shaped rock must not be used unless the individual rock thickness is greater than 0.33 times the length. (a) Exception: US 250NW is 5 pounds short on "grab breaking load" for Sediment Filter Bags. When placing rocks, the contractor should ensure each placed rock is stable and not dependent on the one on top to hold it in place. >> GHnBc__'h1'u]SO0P+R&yGeJ$FP?cSp28 1}9AQ #T6Bc*)_vU"]T hY# 1 0 obj Project Details For EA 04-0A0204 ITEM NUMBER 729011 ROCK SLOPE PROTECTION FABRIC (CLASS 8) Bid Opening Date (mm-dd-yyyy): 04-21-2021 District-County-Route-Postmile: 04-SON-1-R15./R15.7 Quantity: 220 SQYD Unit Price: $21.50 Total Price: Type of work: REALIGN ROADWAY All items. Mirafi 140N is a lightweight non woven geotextile that meets AASHTO M288 Class 3 geotextiles for separation and subsurface drainage. Refer to Section 6-202, Responsibilities for Acceptance of Manufactured or Fabricated Materials and Products, of this manual for additional information. For RSP Classes I thru VIII, use Class 8 RSP-fabric which has lower weight per unit area and it also has lower toughness (tensile x elongation, both at break) than Class 10 RSP-fabric. Mirafi N-Series nonwoven polypropylene geotextiles are used for soil separation, drainage in Transportation, Building Site, and Water Infrastructure projects such as subsurface drainage, permanent erosion control and roadway separation applications. When rock slope protection fabric is required for either method, ensure the contractor places the fabric before placing the rock slope protection. The concreted-rock slope protection method is used where large rock is not economically available in large quantities, yet a heavy, service type of protection is required. To ensure the success of Method A, ensure that the bearing of rocks from one to the other follows specifications and that the use of chinking rocks is limited to filling voids. If there are no prevailing agency specifications, it is recommended to follow AASHTO M288 for subsurface drainage applications. If using geotextile fabric, place on the smoothed foundation, overlap the edges at least 12 inches and secure with anchor pins spaced every three feet along the overlap. (b) Paving fabric specification requires a minimum mass of 4.1 sy/oz. stream Riprap can be used to stabilize slopes to prevent erosion and provide support. These products were developed to meet specific agency (DOTs, MTOs, etc.) Intermittent inspection of placement of slope protection, slope paving, and fabric operations. AASHTO is typical mass of 4.1 sy/oz.. Place a layer (six inch minimum) of 0000013368 00000 n endobj The maximum height of the vertica l lower portions 3.5 feet. TAR_%R5Wa%*x4ux-x5d1c iU:v9b!KXGcFK 1fN2 t K! 0000002336 00000 n 0000012468 00000 n 1, METHOD B) (CY), ROCK SLOPE PROTECTION (NO. Standard contract items and descriptions for Caltrans projects. Rock riprap consists of loose rock that is dumped on the slope and distributed. 1, METHOD B) (TON), ROCK SLOPE PROTECTION (NO. Click on a heading to sort by that heading. Provide filter fabric in accordance with DMS-6200, Filter Fabric. For protection stone riprap, provide Type 2 filter fabric unless otherwise shown on the plans. 1 0 obj Geotextiles have been in use for thousands of years dating back to the Egyptian Pharaohs. endobj %PDF-1.4 % <> Also, ensure the contractor does not drop rock into place; otherwise, cracking or breaking may occur. 0000014231 00000 n <> 0000012187 00000 n Need quick pricing on Erosion Control Fabric? Soil Stabilization Matting - Channel Application, Perm. Suggested levels of inspection for slope protection activities are: Ensure the contractor is actively performing quality control on placing slope protection and slope paving throughout the operations. The gabions are placed on filter fabric as detailed in the plans and specifications. Use all suitable material in the work. Values shown are based on Table 873.3A dimensions and an assumed specific gravity of 2.65. Placement of Bedding Material 1. To provide the desired cleanliness, the contractor may need to sluice the rock or facing. Mirafi N-Series nonwovens combine high water flow rates, high soil interaction and durability while providing excellent soil particle retention. or call /Filter/FlateDecode concreted-rock slope protection (1/2 t, class vii, method b) (ton) 723215 concreted-rock slope protection (1/4 t, class v, method b) (cy) 723220 concreted-rock slope protection (1/4 t, class v, method b) (ton) 729011 rock slope protection fabric (class 8) 729012 rock slope protection fabric (class 10) 750020 rigid rail fall protection system (b) Paving fabric specification requires a minimum mass of 4.1 sy/oz. For RSP Classes IX thru XI, use Class 10 RSP-fabric. Technical Support available for assistance. If you have any questions about the consistency of the gabions, you may also order the unit weight to be verified during the course of the work. << This work consists of protecting slopes, channels, and gutters with riprap, interlock precast concrete blocks, concrete, grouted items, tied concrete block mats, crushed aggregate, or rock items. endobj mum slope of two feet of horizontal distance for one foot of vertical rise. We're available on the following channels. NTPEP Datamine Information: RG80NC is a tracking model number for the following manufacturers products: Mirafi 180NC, SKAPS GE180/GT180C or Propex 861. application/pdf endobj 1 When slope paving with concrete pavers is specified, ensure the special provision requirements are met. The best slope protection type for a given situation depends on the conditions where the installation is to be made, availability of protection material, cost of the various types, and protection desired. The Standard Specifications provide two methods of placement for this type of protection: Method A and Method B. Woven Stabilization and Separation Geotextiles, - Dimensions & Weights for EcoTubes Geotextile Dewatering Tubes, - Dimensions & Weights for EnviroGrid Cellular Confinement, - Material Safety Data Sheet (MSDS) - Drainboard, - Material Safety Data Sheet (MSDS) - Stratagrid, - Material Safety Data Sheet (MSDS) - Envirogrid, - Product Advantages of EcoTubes Geotextile Dewatering Tube, - Product Benefits of EcoTubes Sludge Dewatering Tubes, - Product Benefits of US Fabrics' Foundation Drains, - Product Benefits of US Fabrics' Sheet Drains, Design/Installation Guidelines; Applications, - Comparing Old Style & New Style - Strata Geogrid, - French Drain Exterior Foundation Install, - Geogrid & Welded Wire Form Inside Corner Placement, - Installation Guideline for Separation Heavy Geotextile, - Installation Guideline for Separation Medium Geotextile, - Sheet Drain Exterior Foundation Install, - Theoretical Tube Volumes & Dewatering Capabilities, - Typical Cross Section - Vegetated Reinforced Soil Slope, - Equivalent Products for Composite Drains, - Volumes & Dewatering Capabilities for EcoTubes Geotextile Dewatering Tubes, - Geogrid Quality for Finished Product and Raw Materials, - Use Woven Geotextiles Instead of Geogrids, - Municipal Waste Water & Water Treatment w/ EcoTubes, - SRW (Segmental Retaining Wall) Drainage.
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