Published: March 2024 | Category: Materials , Specifications | Audiences: Road controlling authorities, Road traffic engineers & consultants, Roading contractors
Geosynthetic soil reinforcement materials employed in the reinforcement of soil structures (embankments, slopes, reinforced soil walls, etc) are materials with widely varying properties. Some geosynthetic materials have a relatively limited history of application and proven performance.
Where geosynthetic soil reinforcement is proposed to be used, the specific geosynthetic reinforcement material and supplier shall be subject to the approval of the road controlling authority.
Based upon submitted product information, testing results, and certification, Waka Kotahi accepts the following geosynthetics for use as soil reinforcement in accordance with Section 6 of the Waka Kotahi Bridge manual.
Note these acceptances apply only to the geosynthetics and not to any facings or connections, and only for products manufactured at the manufacturing facility stated on the Waka Kotahi approval certificate.
Both the manufacturing plant ISO certification and Waka Kotahi certificate dates need to be current at the time of use.
Design parameters given in the Waka Kotahi approval certificates shall be adopted in design.
Related guidance
Bridge manual (SM061)
Summary of accepted geosynthetic materials [PDF, 640 KB] in accordance with clause 6.8.1 of the 3rd Edition of the Waka Kotahi Bridge manual)
Certificate No. |
Product |
Latest issue date |
Expiry date |
1 |
1 Jun 2023 |
13 July 2026 |
|
2 [EXPIRED] |
AceGrid geogrid |
19 Nov 2014 |
18 Nov 2017 |
3 [EXPIRED] |
ParaWeb series geogrid [Note: see Cert. 13] |
11 Nov 2020 |
9 Jan 2023 |
4 |
08 Mar 2024 |
29 Aug 2026 |
|
5 |
08 Mar 2024 |
9 June 2025 |
|
6 |
08 Mar 2024 |
31 July 2026 |
|
7 |
12 May 2023 |
12 May 2026 |
|
8 |
6 Apr 2023 |
12 May 2026 |
|
9 |
28 Feb 2024 |
28 Feb 2027 |
|
10 |
28 Feb 2024 |
28 Feb 2027 |
|
13 |
ParaWeb series geostrips [PDF, 1.4 MB] [Note: see Certificate for technical information] |
17 Oct 2023 |
02 Mar 2026 |
14 |
26 Feb 2024 |
08 Dec 2026 |
|
15 |
24 Nov 2023 |
24 Nov 2026 |
|
16 |
09 Jan 2024 |
09 Jan 2027 |