DETAILED DESIGN OF A SEWER MAIN INSTALLATION BY HDD AND TRAINING OF THE ENGINEERING PERSONNEL

Pubblicato il maggio 30, 2016 da Renzo Chirulli

Client: TEA Spa – Italy

Year: 2011

What I did: I made the detailed design of o channel crossing, by HDD, for the installation of a pressure sewer main for a total length of 320 m (1.000 ft); this project was part of a specialized training program that I carried out with the engineering personnel of the company and that led to the completion of the project of installation of the whole sewer main, entirely made by HDD, for a total length of 5,9 km (3,7 miles), divided in 21 HDD crossings.

DETAILED DESIGN OF A SEWER MAIN INSTALLATION BY HDD AND TRAINING OF THE ENGINEERING PERSONNEL

Plan view and longitudinal section of an HDD crossing - DN900 steel pipe, 464,0 m long.

Job-site layout at the start point of the directional borehole.

CIPP TECHNOLOGY HANDBOOK

Pubblicato il maggio 30, 2016 da Renzo Chirulli

Client: S3 Soncini Spa – Italy

Year: 2004-2005

What I did: I wrote the whole know-how of the company in an internal handbook containing all the instructions concerning production procedures, calculation methods and in-situ procedures of the CIPP technology. I also organized and carried out the specialized training for engineers and operators of Soncini’s licensees.

CIPP TECHNOLOGY HANDBOOK

Studying the in-situ process for CIPP - a sewer by-pass.

Studying the in-situ process for CIPP - the inversion header.

Studying the in-situ process for CIPP - the liner during the inversion stage.

Studying the industrial process for CIPP products production - the felt assembling line.

Studying the industrial process for CIPP products production - calendering of the impregnated liner.

Studying the industrial process for CIPP products production - loading of the impregnated liner in a refrigerated truck.

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HDD RIVER CROSSING WITH SHARP BENDING RADIUS IN VERY DIFFICULT SOIL CONDITIONS

Pubblicato il maggio 30, 2016 da Renzo Chirulli

Client: EDIL IDRAULICA Sas – Italy

Year: 2011

What I did: I made the project management and the supervision of the installation, by HDD, of three HDPE DN 560 (22 in) pressure sewer pipes under the Foglia river, Pesaro, Italy. Three directional pilot bore, with an interaxis of just 1,5 m, along a drill path with a very sharp bending radius (70 m), were successfully drilled under the river bed, facing challenging soil conditions, with big boulders and blocks of stone in a matrix of silt and clay. Although the three pilot bores were perfectly completed, on the first alignment, after completed the first final reaming at 700 mm, the first pull-back failed due to the collapse of underground unstable big blocks of rock. Despite the prohibitive soil conditions we successfully completed the pullback of the two remaining product pipes, achieving a remarkable result in a very difficult HDD work.

HDD RIVER CROSSING WITH SHARP BENDING RADIUS IN VERY DIFFICULT SOIL CONDITIONS

Longitudinal section of the river crossing.

The pipes to be installed - DN560 PE100 pipe. Nominal diameter of the reamed borehole: 700 mm.

A complete set of preliminary survey were done before the detailed project - in the picture a 3D geoelectrical tomography.

Rock boulders in a matrix of silt and clay, represent a challenging soil condition for HDD.

Creating a laser level for depth measuring while drilling.

Continuous mud control and prime drilling fluids were crucial to face so difficult soil conditions.

The HDD rig used to complete the job (Vermeer D50 - 50.000 lbs - 23t pullback force)

The three drill strings laying underground.

Pre-reaming stage - reamer diameter 500 mm.

Final reaming stage - reamer diameter 700 mm.

The pullback stages were carried out during the night shifts to not interfere with traffic.

Pullback of the second product pipe during a night shift

The unexpected presence of big blocks of rocks, along the drilling path, made the work extremely difficult causing the block of the first pullback - in the picture the attempt to clear the drill path of the rocky blocks.

Although more than 20 blocks of rock (dimension ranging in the interval 0,6 - 1,2 m) were removed, the first pipe remained definitively stuck underground.

Although more than 20 blocks of rock (dimension ranging in the interval 0,6 - 1,2 m) were removed, the pipe remained definitively stuck underground.

28 KM OF URBAN CABLING PROJECT BY HDD

Pubblicato il aprile 24, 2016 da Renzo Chirulli

Client: Hydro Quebec, Montreal, QC – Canada

Year: 2000-2001

What I did: I collaborated on the design of a specialized pit launched drilling rig (the pit-launched 250 Scorpio dry directional drilling rig – with 7 tons of pullback force) and on the detailed design of the installation project of more than 28 km (17 miles) of medium tension electrical cables (3 kV), for the connection of 1.000 houses, in the city of Hampstead, Montreal – QC, Canada. I also carried out the training of the engineers and operators both of the Client (Hydro Quebec) and of the Contractor, and I supervised the work in order to assure the expected productivity.

28 KM OF URBAN CABLING PROJECT BY HDD