A range of options to suit your project.
The Quick Culvert 1200 system consists of a range of different precast concrete culvert units, with in-built headwall and base. The single piece design allows for quick and easy installation, without the need to pour and set concrete. Add additional centre sections to extend the crossing length.
The culvert units are an arch shape with an integral flat base which can be considered either as an arch shaped concrete pipe with a flat base or a uni-culvert with an arch shaped crown.
The different configurations of the culvert units that are available are shown in Figure 1 below and consist of:
This culvert unit has an integral end wall (H) and one end and a socket end (S) at the other.
This culvert unit has an integral end wall (H) and one end and a butt end (B) at the other.
This culvert unit has a socket end (S) at one end and a butt end (B) at the other.
This culvert unit has a butt (B) end at each end.
Design of the QC1200 Culvert System
There are a number of similarities between the QC1200 culvert units and precast concrete pipes and small precast concrete box culverts. It could be described as a hybrid of the two.
Technically the Quick Culvert components are a circular arch with a flat base. Overseas, single piece reinforced concrete arch units are used.
There is an ASTM standard for these units, ASTM C506-M (4), which details, among other requirements, both reinforcement and dimensional details.
Headwall Design Options
A headwall structure typically consists of an end-wall, two wingwalls, a cut-off or curtain wall and an apron. For the QC1200 culverts three different options are possible which are explained below:
- Fully precast option with rock mattress or stone pitching aprons at both inlet and outlets. This consists of:
- A precast concrete end-wall integral with the end culvert unit (Type H-S or HB culvert units)
- Precast concrete wingwalls.
- A precast concrete cut-off wall. The purpose of this wall is to protect the bedding of the culvert units from scour or erosion.
- Stone pitching or rock gabions for aprons at both inlet and outlets. This apron does need to be designed by the road designer. Some road authorities do allow the use of this type of apron – e.g. Roads and Maritime Services drawing R0210-02.
This solution is recommended for installations with soil foundations (not rock), for culverts at right angles (zero skew) to the road or with low skew angles and where availability of premixed concrete is limited or is cost prohibitive. Typical details of this arrangement are shown in Figure 3 below (a better resolution copy of this Figure is also attached in Appendix B).
"the Padman MaxiFlow unit is easy to install as opposed to the pipes"
Andrew & Dean Jobling from Jobling Excavations
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