Raupiano Plus Product Book | Rehau | Reece Plumbing

8.3 EmbedmentThe embedment of the pipe installed in ground is comprised of the:- Pipe bedding- Side support- Pipe overlay- BackfillAS/NZS 3500.2 - Section 5.4 Bedding of Drains and Backfilling must becomplied to. The following are the manufacturers recommendations forRAUPIANO PLUS pipes installed below ground.LocationSubject to heavy vehicular trafficMinimum depth of cover(mm)N/ASubject to light vehicular traffic 500*Ensure that the embedment is created carefully, as it is the maindetermining factor in the supportive capacity of the pipe.Bedding, sidefilling and initial backfilling shall be carried out inaccordance with the design and specification. The embedment shouldbe protected against any foreseeable change of its load bearing capacity,stability or position that could be caused by removal of sheeting,groundwater influences or other excavation work. When parts of a pipelineneed anchoring or strengthening, this shall be done before placement ofthe embedment. During placement of the embedment special attentionshould be given to the following:- avoidance of displacement of the pipeline from line and level;- care for placement of upper bedding to ensure that the voids under thepipe are filled with compacted material.8.3.1 Bedding MaterialsEmbedment materials must comply with the design specifications. Thiscan also be the excavated soil, whose suitability has been checked.When selecting embedment materials and their grain size, observe thefollowing:- Pipe diameter- Pipe material- Pipe wall thickness- Soil characteristicsEmbedment materials must comply with requirements stated in AS/NZS3500.2 - Clause 5.4 and AS/NZS 2566.2.8.3.2 Pipe beddingThe pipe bedding is comprised of a bottom bedding layer, a pipe sidesupport layer and a top bedding layer. The width of the pipe bedding mustmatch the trench width.Table 8-1BackfillCompacted pipeoverlayCompacted pipeside supportCompacted pipebeddingB min. = D+ 200Fig. 8-2Elsewhere 300*Minimum depth of cover for RAUPIANO PLUSExistingsurface100 min. D 100 min.B min.Ground levelRecommended bedding of drainsSee table 8.175 min.Special pipe bedding or support construction typeAny localized quantity of soft ground below trench bottom shall beremoved and replaced with suitable bedding material. If more extensivequantities are encountered a re-evaluation of the structural design shouldbe undertaken.NOTE:Very soft or expansive clays, irregular or fragmented rock, and saturatedsoils, are unsuitable pipe beddings and should be avoided. Whereavoidance is impracticable, most of these situations may usually beovercome by adequate drainage of ground water, and removing theunsuitable material and replacing it with compacted embedment material.D75 min.BackfillPipe overlayPipe side supportBed zone* Static calculations must be conducted in order to quantify that mechanical loading on the RAUPIANO PLUS pipe will be avoided at all times. Drainsconstructed with less than minimum cover will be required to fulfill Clause 3.7 of AS/NZS 3500.2.42