pipe backfill stones soil broken


Excavated sand may be used as backfill. Pebbles and stones in the sand shall be comparatively few, and not ... In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods ... caused by broken and missing pipe and the subsequent erosion of supporting pipe materials shall also be filled


Remove soil not meeting the classification specified as suitable backfill material in 1258.3.2.2, to a depth of 4 inches [100 mm] below the bottom of the pipe elevation. Remove rock, boulders or other hard lumpy or unyielding material to a depth of 12 inches [300 mm] below the bottom of the pipe elevation.

Ask the Engineer: Proper Bedding for PVC Pressure Pipe

ally accepted as the soil structure around the pipe and not necessarily the bedding upon which the pipe rests. This would include the haunching and initial backfill areas. The soil structure requirements for pressure pipe are less stringent than for gravity sewer pipe. This is primarily due to the fact that pressure pipe is usually buried at ...


special water trench backfill note: pipe shall be backfilled with select fill material for 24" above top of pipe. select fill material shall consist of sand or soil with no stones greater than 2" in diameter. backfill material may contain stones up to 6" in their greatest dimension from 24" above the top of the pipe …

Culvert Inspections

 · 3 Mortar may show heavy deterioration with some loose or broken stones. The pipe is misaligned with significant settlement and backfill infiltration. End sections of the pipe may be dislocated. 4 Mortar may be missing in most areas with broken or detached stones throughout. Local failure and widespread backfill infiltration are present.

02225 Trench Excavation and Backfill

height above the bottom of the barrel of the pipe. 4. Initial Backfill: The area above the haunching material and below a plane 18 ... ASTM D 1556, "Density of Soil In Place by the Sand Cone Method", ASTM D 2937, ... crushed stone or rock, crushed gravel, broken coral, crushed slag, cinders or shells. 3. Class IB embedment material is generally ...

aashto specifications for crushed stone as backfill materials

Specification for redi-rock ® 41" series wall system131 Кб. PART 2: MATERIALS 2.1 Wall Units A. Wall units shall be Redi-Rock® as produced by a licensed manufacturer.2.2 Leveling Pad and Free Draining Backfill A. Leveling pad shall be crushed stone pact backfill to 95% of standard proctor (ASTM D 698, AASHTO T99) density within 2% of its...


against damage or flotation prior to placing backfill. 2.5 TRENCH EXCAVATION AND BACKFILL: A. Pipe Bedding and Backfill Material: Select material shall be material free of large stones, hard lumps, frozen matter, organic material, debris and other objectionable material. If


backfill for structures, preparation of embankments and fills, and subgrade preparation ... as soil, rocks, blocks, crushed stone, broken concrete, etc. Fill material ... PVC pipe and fittings from four (4) inches to fifteen (15) inches in 4 . This . or . 1" 2" drawings. All . standards. standards., The . *

Pipe Bedding and Backfill

Type of soil used for bedding, embedment, and backfill 3. Distribution of soil around pipe 4. Density of soil around pipe 5. Deflection of flexible pipe In the Bureau of Reclamation, installation requirements are different for each of the following cases: 1. Rigid pipe 2. Flexible pipe 3. 250-mm (10-in) diameter pipe …


directed power tamper to provide a firm foundation for the conduit at the existing grade. Do not backfill with any soil containing broken tile fragments. Using selected soil free of hard clods, rocks, or frozen soil, hand tamp the backfill material around the haunch of the pipe in layers not over four (4) inches thick to provide support.

Trenching, Excavation and Backfill | UpCodes

Backfill shall be free from discarded construction material and debris. Loose earth free from rocks, broken concrete and frozen chunks shall be placed in the trench in 6-inch (152 mm) layers and tamped in place until the crown of the pipe is covered by 12 inches (305 mm) of tamped earth.

Does PVC Require Class I Backfill in All Applications ...

In general, the sanitary market is easy; nearly 99% of the governing agencies that use PVC pipe require a manufactured aggregate or crushed stone backfill. ASTM D2321 would classify stone as Class I backfill material. There are two main types of gravity PVC pipes used in the sanitary industry, solid wall SDR and profile wall (e.g. Contech''s A ...

The Ultimate Guide to Trench Backfill Material

 · Switching to a soil at certain heights above the pipe may be allowed. Uncompacted Soil Backfill This is comprised of whatever soil material is on site. It is simply putting the moved soil back in the trench without any compaction effort. It will then need to be mounded up to prevent settling. This is the cheapest option — but after it settles ...


directed power tamper to provide a firm foundation for the conduit at the existing grade. Do not backfill with any soil containing broken tile fragments. Using selected soil free of hard clods, rocks, or frozen soil, hand tamp the backfill material around the haunch of the pipe in layers not over four (4) inches thick to provide support.

02255-Bedding, Backfill, and Embankment Materials

3. Free from trash, vegetation, organic matter, large stones, hard lumps of earth and frozen, corrosive or perishable material. 4. Well broken up, free of clods greater than 6 inches, hard earth, rocks, and stones greater than 2-inch dimension. E Structural Fill. Soils defined by ASTM D …


C. Suitable Backfill Material: Backfill material shall be clean and free from all organic material, clay, marl or unstable materials, debris, lumps, or broken paving. No rocks or stones larger than 6 inches in diameter s hall be allowed in any backfill. Material for backfill may be material


 · material such as rock, cobble, soft or organic soil, when Engineer determines that material is unsuitable to support pipe. B. Backfill Material. 1. Trench Backfill: Native or Borrow Material placed in trench excavation and meeting specifications herein. 2. Borrow Material: Suitable material used fo r Trench Backfill provided from locations

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

 · Using Pea Gravel as Flexible Pipe Backfill. 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.

Best backfill materials to keep new perimeter drain clean ...

 · A lower-risk option seems like gravel around the pipe, with sand top of the gravel then soil backfill (essentially removing the fabric), but I''m not sure. Two other small side questions: (1) if we use gravel, the stone yard said around here all the builders backfill …

Trenching and Backfill

stones and shall comply with the select native fill specification within Section 31 23 00, Excavation and Backfill, General. When native excavated material is approved by the Engineer for backfill around the pipe, it shall be free of rocks, cobbles, stones, or other debris having a dimension greater than 1-1/2 inches. 2.2 Granular Backfill Material

603 Pipe Culverts, Sewers, and Drains

The backfill materials may be Structural Backfill Type 1 or 2, soil, or granular embankment. These backfill materials are required or an option depending on which type pipe is specified and whether the field situations are a cut or fill. See Standard Drawing DM-1.4 for details.

Understanding Backfill Compaction Requirements | Stone ...

Backfilling is an important part of the construction process. Backfilling happens after excavation, when the soil is compacted back into the trench or foundation is used to help protect foundations, roadways, walkways and other structures by using a mixture of soil, rocks, and stones.

How to backfill a marshy area

Any land that has waters 7 days a year is a federal wetland and the bounders are set by the types of plants that are found. Check your state DEC. department. check local town building inspector as they should have wet land map. But your question w...


1. The type of backfill and repaving of trenches under 2. Asphalt thickness shown here are in addition to 4. Payment for asphalt to be in tons of material speci-cost is to be included in unit price of pipe. Asphalt existing asphalt thickness and 18" stone are restored. 8. Concrete surface to be rough for bonding of asphalt if area is to be ...

300 Drainage, Culverts and Underdrain Piping rev1703

compacted during filling. Snow, ice, and frozen soil will not be permitted. Backfill material for plastic pipe installation: ¼‐inch crushed stone shall conform to the requirements of Section M.02.05 of …


1107 - AGGREGATES FOR BACKFILL 1100-21 SECTION 1107 AGGREGATES FOR BACKFILL 1107.1 DESCRIPTION This specification covers aggregate for backfill. Use this when structures, pipe, mechanically stabilized earth (MSE) walls (panel or modular), underdrain, permeable or crushed stone backfill requirements are specified in the Contract Documents.


Granular backfill shall consist of natural sand or a mixture of sand with gravel. Broken Portland cement concrete and bituminous type pavement will be permitted, subject to the gradation limits specified herein. The granular backfill material shall have a sufficient amount of fine material to fill the voids between the coarser aggregate. B.


Native earth backfill used above the pipe zone shall be excavated fine grained materials or loose soil free of asbestos, organic matter, roots, debris, rocks larger than 6 inches in diameter, clods, clay balls, broken pavement, and other deleterious materials.

17070/Trenching & Backfilling for Piping Systems

B. Backfill material containing limerock shall have sufficient sand to fill the voids in the limerock. No stones or rocks larger than 6-inches in diameter will be permitted in any backfill. Backfill material placed to a point at least one foot (1 ft.) above pipe and appurtenances shall be select backfill material not exceeding 2-inches in diameter.

Section 812 Backfill Materials

Section 812—Backfill Materials Page 3 1 Crushed Stone Use a material manufactured from Class A or B stone free of soil overburden and having a soundness loss of not more than 15 percent. 2. Natural Sand Use material that consists of strong, hard, durable particles, is non-plastic, and has a durability index of at least 70. 3. Gradation

5 Best Stones for Backfill | Ozinga

Explore the five best stones for backfill below. 1. SCREENINGS. Screenings, otherwise known as FA5 or limestone screenings, are a great choice for backfill because it compacts well. Because of this, screenings are most often used for pipe and sewer backfill, or as a base for brick pavers. 2.

Pipe Embedment Materials

PIPE EMBEDMENT MATERIALS. The embedment material may be imported, such as a crushed stone, or it may be the ("native") material excavated from the trench to make room for the pipe. The embedment material should provide adequate strength, stiffness, uniformity of contact (i.e., completely envelop the pipe) and stability to minimize deformation ...

Best Backfill for a Retaining Wall

 · Drainage Stone. The drainage stone will be installed at the back of the retaining wall and will extend 12-in behind the wall. Drainage stone allows for water to freely flow through to the drain pipe and out the face of the wall. For more on how drainage stone fits …

10-28-2019 Excavation and Backfill.pdf

 · EXCAVATION AND BACKFILL PART 1 GENERAL 1.1 DESCRIPTION ... All rock shall be excluded from fill within 24 inches of the pipe. E. Riprap: Provide rock, broken concrete (if no reinforcing steel is present), or stone of ... Fill shall not consist of any organic soil or stone larger than ò LQFK in any dimension.

Backfilling a foundation wall

 · Use 3/4" stone, not road stone with fines. It too is self compacting (trench backfill). Lay the plastic drain tile, returning each end to a T and a sleeve that goes back through the footing into a drain sump inside the foundation. Put a sump pump in the sump, problem solved. Cover the drain tile with 2'' of stone.

Corrugated Steel Pipe Backfill Alternatives

soil migration or piping. Alternatively, soil migration can be controlled by using a geotextile fabric as a separator. The height of final soil cover, as well as the stiffness of the pipe itself, dictate which materials are suitable. The soil load that must be carried by the pipe often depends upon the quality (stiffness) of the backfill.