search.noResults

search.searching

dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
Technical Feature


The benefits of plastic manholes and their inclusion in SFA8


Plastic manholes have become an essential part of the UK sewerage system landscape, due to their many performance qualities and ease of use. They are a modern yet well-established installation, providing a practical and regularly used solution. By being built off-site and delivered complete, they save project time and represent an excellent example of lean construction techniques in action, reducing waste, effort and cost.


During this 20th anniversary issue of Drain Trader, it is appropriate timing that these high quality plastic manholes have been recognised and included in the latest draft of Sewers for Adoption guidance (SFA8).


BPF Pipes Group members share some of their recent case studies demonstrating the successful application of polyethylene (PE) manholes.


The benefits of off-site builds


At a former brownfield site in Norfolk, 67 high- quality homes were created by housebuilder Lovell. Although the site was originally planned to have a traditionally built concrete attenuation system, the project civil engineers switched to a polyethylene system based on their successful experience of using plastic manholes on other sites, the quality of the product, advantages of speed of production, delivery, and ease of use on site.


44 drain TRADER | April 2018 |


Lovell Regional Operations Director Trevor Haystead confirmed: “We are committed to sourcing the best and most efficient products and procedures for all our projects. Taking the decision to use plastic products in place of concrete enabled work at the Firs Park development to take place more efficiently than was initially anticipated. We are pleased with the outcomes and have resolved to use plastic in future projects.”


A total of 12 manholes were provided, with 185 metres of 1050mm and 900mm diameter pipework.


These manholes are a great example of agile project management, being constructed off-site, tailored to exact project needs and delivered quickly, ready to be installed and connected. They help reduce traditional construction site issues of time, cost and health and safety, requiring less heavy lifting equipment, and represent the welcome evolution of the construction industry.


Plastics proven for complex civils projects


The soft ground at a major housing development in King’s Lynn represented a challenge for the ground-working team, as the risk of settlement can occur during or after the construction phase due to the compressibility of this kind of soil.


When ground conditions are soft and malleable, heavy concrete chambers used for ongoing access to pipework are likely to sink, and excessive settlement of chambers puts everything built above at risk. While piling is a common solution, increasing and strengthening the load capacity of a traditional foundation build, it requires deep drilling and additional supports, adding labour, time and material costs.


However, the flexibility of polyethylene allows products to move with the ground, obviating the need for piling for the water management system and the drainage infrastructure. This saved considerable time, and the manholes


www.draintraderltd.com


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84