trench backfill with crushed rock

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  • backfill - what do you like? | Terry Love Plumbing Advice ...

    B. Backfill trench to a compacted depth of 1 foot over the pipe with clean earth fill. Backfill shall be properly placed uniformly on each side of the pipe and compacted as required. Do not backfill on muddy or frozen soil, or with muddy or frozen soil. C. Backfill trench from 1 foot above the pipe to grade with clean earth fill free of

  • Using Pea Gravel as Flexible Pipe Backfill > Contech ...

    Obviously it would be best to backfill with ¾" rock, so any water could drain freely to the drain tile at the bottom of the wall. However, the volume to fill is from 4′ to 6′ deep by 10′ high for some 70′ length, which—if rock—will cost a small fortune. There is however no shortage of soil.

  • 33 05 28 - Trenching and Backfilling for Utilities

    A granular backfill will drain more freely than a cohesive, clay backfill, which is one reason cohesive fill materials are not recommended for use as select backfill for these pipe systems. Controlled low-strength material (CLSM, also known as flowable fill or controlled density fill) …

  • INSTALLATION - JM Eagle

    A. Backfill: Soil materials used to fill an excavated trench: 1) Initial Backfill (Select Earth Backfill): Backfill placed beside and 12 inches over the top of the pipe in a trench, including haunches to support sides of pipe. 2) Final Backfill (Common Earth Backfill): Backfill placed over the initial backfill to fill a trench.

  • Product List | Miles Sand & Gravel

    TRENCH EXCAVATION AND BACKFILL - Registration ... m43 notation aashto m145 no 4 4 75mm no 200 0 075mm ll pi cu cc i 2 crushed rock angular 3 n a angular crushed stone or rock crushed gravel crushed slag large voids with little or no fines 5 56 57 4 6 67 class v materials shall not be permitted as bedding and backfill material classes of ...

  • 33 05 28 - Trenching and Backfilling for Utilities

    TRENCHING AND BACKFILLING FOR UTILITIES RELEASE – R2.1 SECTION 33 05 28 BART FACILITIES STANDARDS Issued: 10/01/2009 PAGE 2 OF 4 STANDARD SPECIFICATIONS 1.05 DESCRIPTION A. This Section includes specifications for excavating, trenching, and backfilling …

  • Affordable backfill without sacing drainage ...

    Feb 26, 2010· looks like he asked what to use for backfill. Backfill in this area is on top and around the pipe. Round or crushed, its a no-go. You cannot compact round river bed washed rock anyway - you need to mix it with fines and then we call it class 1 or 2 road base.

  • Backfilling Pipe Trenches - ConstructionMentor.net

    Embedment materials should be Class II granular material or Class I crushed rock. Installation of embedment materials around the pipe should follow ASTM D2321 guidelines. In either stable or unstable soil conditions, where wide trench construction is required a variation of vertical minimum trench width is to lay the pipe in a subditch and backcut

  • San Antonio Water System Standard Specifications for ...

    For a stacked-block retaining wall that's no higher than four feet, a trench filled with three inches of crushed rock will help keep the wall from shifting and settling.

  • STANDARD SPECIFICATION PART 1 - GENERAL

    Aug 09, 2019· Flowable Fill . Backfill can also be done using flowable fill, a cementitious material with a low water-cement ratio that is delivered to the job site by a ready-mix truck. Typically, the utility pipe or other equipment in the trench is first covered with an aggregate material, then the flowable fill is placed in the trench directly from the truck, just like regular concrete.

  • SECTION 10 - TRENCHING AND BACKFILLING

    trench sidewall to obtain clearance will not be permitted. If the contractor prefers to undercut the bottom of the trench and bring to grade with 1/2-inch (1/2") crushed rock, he may do so, provided the depth of undercut and backfill with crushed rock shall not exceed four inches (4"). Where crushed rock is used, it shall be placed in the

  • STANDARD CONSTRUCTION SPECIFICATIONS TABLE OF …

    Installation contractors frequently ask if it will be permissible to use "pea gravel" for the select fill envelope for flexible pipe products. One must consider the practical and structural issues relating to the use of pea gravel as flexible pipe backfill before answering this question.The primary purpose of a pipe's select backfill envelope is

  • 1. PROPOSED STREETS- REFER TO DETAIL TB-1 TRENCH …

    The thermal backfill must be laboratory evaluated and include specifications for mineral quality, gradation (sieve analysis), thermal dryout curve and optimum density. Typically, the entire trench width is filled with thermal backfill to a minimum height of 300 mm (12 inches) above the cables.

  • SECTION 5 TRENCH BEDDING, BACKFILL & EXCAVATION

    A. Backfill Option: Either crushed aggregate base or bedding sand material may be used for backfill material in the trench area between twelve (12) inches above the …

  • Building a Retaining Wall: 8 Dos and Don'ts | Bob Vila

    5. class iv materials require a geotechnical evaluation prior to use and should only be used as backfill under the guidance of a qualified engineer. 6. uniform fine sands (sp) with more than 50% passing a 100 sieve behave like silts and should be treated as class iii soils if allowed. 7.

  • Practical Considerations Related to the Use of Alternative ...

    Crushed rock or gravel shall conform to Section 50-14, "Crushed Rock", of these Specifications. Sand backfill, when permitted by the Agency, shall conform to the requirements in Section 50-13.01, "River Sand", of these Specifications. Such backfill material shall be compacted to a minimum relative compaction of ninety percent (90%).

  • SECTION 19 - TRENCH EXCAVATION, BEDDING AND …

    Backfill Gravel The first back-fill should be washed, crushed rock or gravel that is 3/4 to 1 1/2 inch in diameter. Continue to fill the trench until a 12-inch depth remains from the rock up to the top of the trench. Overlap the filter fabric on top of the gravel. The remainder of the trench is then filled with the soil that was dug out when ...

  • 5 Best Stones for Backfill | Ozinga Blog

    A. Standard Trench Excavation: All materials encountered during trench excavation, except rock and over-excavation. 1. Suitable Backfill Material: Class II, Class III, Class IVA, or Class IVB as defined in Section 3010, 2.02. 2. Unsuitable Backfill Material: Includes, but is …

  • Affordable backfill without sacing drainage ...

    A. Standard Trench Excavation: All materials encountered during trench excavation, except rock and over-excavation. 1. Suitable Backfill Material: Class II, Class III, Class IVA, or Class IVB as defined in Section 3010, 2.02. 2. Unsuitable Backfill Material: Includes, but is …

  • Section 3010 - Trench Excavation and Backfill

    Gravel Backfill – For Walls; Crushed Surface Top Course – 5/8″ Crushed Surface Base Course – 1 1/4″ Railroad Ballast – 1 1/4″ Minus City Ballast – 2 1/2″ Minus Crushed Rock – 3/8″ Minus Crushed Rock – 1/4″ Single Pass Crushed Rock; Minus Crushed Rock Structural Fill – 2″ Pit Run; Gravel Borrow; Trench Backfill

  • SECTION 02221 TRENCHING, BACKFILLING AND …

    Feb 26, 2010· looks like he asked what to use for backfill. Backfill in this area is on top and around the pipe. Round or crushed, its a no-go. You cannot compact round river bed washed rock anyway - you need to mix it with fines and then we call it class 1 or 2 road base.

  • Backfilling Trenches and Other Excavations

    TRENCHING AND BACKFILLING FOR UTILITIES RELEASE – R2.1 SECTION 33 05 28 BART FACILITIES STANDARDS Issued: 10/01/2009 PAGE 2 OF 4 STANDARD SPECIFICATIONS 1.05 DESCRIPTION A. This Section includes specifications for excavating, trenching, and backfilling …

  • SECTION 31 23 33 TRENCH EXCAVATION AND BACKFILL …

    material shall be well graded crushed rock with a maximum aggregate size of 3/4-inch in the bedding and pipe zone, and a maximum aggregate size of 1-1/2-inch in the trench backfill zone. All gradations of crushed rock shall comply with Section 31 23 00, Excavation and Backfill, General. 2.3 Foundation Stabilization Material

  • 02210 - TRENCHING, BACKFILLING AND COMPACTION OF …

    The ideal material for pipe trench backfill under pavements is crushed limestone with rock ranging from fines all the way up to 2-1/2″. Properly graded crushed limestone has just the right balance of aggregate sizes and square shaped aggregate to ensure interlocking of the particles which will ultimately maximize density, strength, and resist ...

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