PROJECT OVERVIEW.

Pezzimenti Tunnelbore completes a large scale industrial development in Horsley Park by Goodman Property Services – required 1,946m long lead in sewer with diameters ranging.

Pezzimenti Microtunnelling Method Pipejack Close Fit Pipe East St Clair

St Clair Microtunneling Pezzimenti Length Diamter Ground Pipes

9 Seperate microtunnels

The downstream section of the lead-in followed the flood plain of Ropes Creek and the ground was saturated sandy clays, and clayey gravels. The upstream section moved away from the creek and the ground changed to shale. Out of the 1,946m 1,073m was microtunnelled in 9 separate microtunnels. In the non-self-supporting softer alluvial ground GRP jacking pipes were jacked. In the stable and self-supporting shale ground microtunnelling was done by Freeboring and then sliplining the jacking pipe into the microtunnel.

Pipe Design.

The project was designed by Qalchek, accredited designers for Sydney Water, who Project Managed the works on behalf of Goodman Property Services now Fielders. Qalchek called tenders and let the head contract to Athassel. Athassel purchased the GRP jacking pipes from Iplex. The pipes were manufactured in Adelaide by RCP. Once the primary parties had been nominated the detailed pipe design was finalised between Qalchek, Athassel, Iplex and Pezzimenti and submitted to SWC for final approval. Pezzimenti provided the final detail of the expected axial loadings on the pipes for the various lengths which decided the class of pipe to be chosen.

St Clair Microtunnelling

Iplex RCP GRP Jacking Pipe is being jacked through soft alluvial staurated clays and sandy gravels. 

St Clair Microtunnelling

The next jacking pipe is being prepared in the surface.

St Clair Microtunnelling Site Layout

Site Setup. From left to right the equipment used at this shaft site was a trailer mounted hydraulic power pack, the generator for 24 hour dewatering, pipes stockpile, crane truck vacuum capture bins and hook truck. The vacuum power unit is out of view. 

MICROTUNNEL 1.

StClair_Microtunneling_Outcome_Close_Fit_Pipe
Close Fit Pipe by Freebore Method

Length. 45m
Diameter.  440
Ground.  Shale
Casing Pipe.  375 GRP JP
Carrier Pipe.  375 GRP JP

MICROTUNNEL 2.

StClair_Microtunneling_Outcome_Close_Fit_Pipe
Close Fit Pipe by Freebore Method

Length. 147m
Diameter.  630
Ground.  Clay / Shale
Casing Pipe. –
Carrier Pipe.  525 GRPJP

MICROTUNNEL 3.

StClair_Microtunneling_Outcome_Close_Fit_Pipe
Close Fit Pipe by Freebore Method

Length. 108m
Diameter.  630
Ground.  Clay / Shale
Casing Pipe. 
Carrier Pipe.  525 GRP JP

MICROTUNNEL 4.

StClair_Microtunneling_Outcome_Close_Fit_Pipe
Close Fit Pipe by Freebore Method

Length. 171m
Diameter.  530
Ground.  Clay
Casing Pipe. 
Carrier Pipe.  450 GRP JP

MICROTUNNEL 5.

StClair_Microtunneling_Outcome_Close_Fit_Pipe
Close Fit Pipe by Freebore Method

Length. 149m
Diameter.  630
Ground.  Sandy Clay
Casing Pipe. 
Carrier Pipe.  525 GRP JP

MICROTUNNEL 6.

StClair_Microtunneling_Outcome_Close_Fit_Pipe
Close Fit Pipe by Freebore Method

Length. 178m
Diameter.  530
Ground.  Shale
Casing Pipe. 
Carrier Pipe.  525 GRP JP

MICROTUNNEL 7.

StClair_Microtunneling_Outcome_Close_Fit_Pipe
Close Fit Pipe by Freebore Method

Length. 54m
Diameter.  530
Ground.  Clay/Shale
Casing Pipe.
Carrier Pipe.  450 GRP JP

MICROTUNNEL 8.

StClair_Microtunneling_Outcome_Close_Fit_Pipe
Close Fit Pipe by Freebore Method

Length. 180m
Diameter.  530
Ground.  Clay / Shale
Casing Pipe. 
Carrier Pipe.  450 GRP JP

MICROTUNNEL 9.

StClair_Microtunneling_Outcome_Close_Fit_Pipe
Close Fit Pipe by Freebore Method

Length. 41m
Diameter.  530
Ground.  Shale
Casing Pipe. 
Carrier Pipe.  450 GRP JP

Download Pezzimenti St Clair Microtunneling Project PDF