• 120 kN CPT penetrometer unit on an Unimog 4x4
  • Interior of the CPT working cabin
  • Touch screen controls
  • Hydraulic push-and-pull clamp of the CPT pusher
  • Bott workbench inside the CPT cabin
  • 120 kN CPT penetrometer rig with bellows up
  • Unimog U5000L on the jobsite
  • The CPT penetrometer rig is provided with 3 stabilising jacks
  • Storage rack for tools near the entrance door
  • Navigating through an orchard
  • 120 kN CPT unit on a Unimog U5000L
  • Unimog U5000L
Gouda Geo-Equipment B.V.
Satellietbaan 8
2181 MH Hillegom
The Netherlands


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Truck-Based CPT Penetrometer Rig - Max. 120 kN

The CPT truck is a CPT penetrometer rig based on a truck-chassis. The CPT truck has been designed to execute soil mechanical research based on static Cone Penetration Testing (CPT) techniques in an efficient manner. By means of the penetrometer pusher, installed in the centre of gravity of the CPT truck, either an electrical or mechanical probe (called a cone) is pushed into the ground and the mechanical resistance and friction of the soil is recorded. The CPT truck itself has a relatively high own weight and serves as counterweight to provide the required penetrative force.

The CPT truck is normally used on badly accessible job-sites and will therefore be constructed on top of a 4x4 all-wheel drive truck chassis. Before the CPT truck can do a CPT test, it is to be levelled horizontally. This is done by means of the levelling jacks; 3 hydraulic cylinders with large footplates that actuate the up and down movement of the truck. With these jacks the CPT truck can be levelled exactly horizontally and and the large footplates assure its stability during testing.

All functionalities of the CPT truck are driven hydraulically. The diesel engine of the truck drives the hydraulic pump that generates the required working pressure and volume for all hydraulic functions.

The CPT penetrometer pusher is located inside the working cabin of the CPT truck. Next to it the operating lever for the up-and-down movement of the penetrometer pusher is located and the electrical cabinet housing all electronics, the engine control panel and control elements.

Truck with 4x4 Drive Train
The client is completely free to select the base truck to be converted into a CPT truck. This can either be a new or a secondhand truck. Taking in mind, that the truck has to operate in the field, we strongly recommend to opt for an all-wheel drive truck. The engineering team of Gouda-Geo will help the client to select the right base truck.

Standard Equipment
The CPT truck comes standard with the following equipment:

Optional Extras
The CPT truck can be supplied with the following optional extras:
International Standards, Safety and CE Marking

The CPT penetrometer rig is designed and built in accordance with national and international standards and regulations. It complies with the provisions of the EC Directive 2006/42/EG and is provided with CE marking certifying that it meets EU consumer safety, health and environmental requirements.
The rig is equipped with a 200 kN CPT penetrometer pusher suitable to accommodate the measuring equipment for all kinds of Cone Penetration Tests with a maximum pushing force of 200 kN, such as: The Cone Penetration Tests can be performed according to international standards like ISO 22476-1, ISO 22476-12, NF P94-113, Eurocode 7, ISSMGE standard, ASTM D3441-05, ASTM D5778-12, ASTM D6067-96, ASTM D7400-08, and alike. This includes of course Class 1 piezocone CPTU tests and dissipation tests.
The operating procedures of the machine are described in detailed, easy-to-read and well-illustrated user manuals.

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