Dixeran® | Declutching detector

Guaranteeing Interlock Hooking: Dixeran® Declutching Detector for Difficult Soil Driving in Sensitive Construction Projects

Dixeran® - a reliable shear-type declutching detector that ensures perfect interlock hooking in challenging soil driving conditions for sensitive construction projects. The operating principle is straightforward - a shear sensor protrudes into the pile interlock, and if the following pile shears off the protruding sensor pin or causes a short circuit by deforming it, the sensor sends a signal through an electrical cable to the control box at the surface. 

With clear instructions for sensor installation and operating procedures, monitoring declutching is a simple process. Our document provides comprehensive information on the Dixeran® declutching detector, including its applications, operation, installation, and standard supply. 

The document is available in three languages - English, German, and French.

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Shear-type declutching detector

Declutching detectors are used in soils that are technically difficult for driving, in order to guarantee a perfect hooking between interlocks of AU®, PU®, GU® and AZ® piles as well as HZ®-M systems. This may be required for the tight enclosure of landfill tips, multistorey underground car-parks, dykes or other sensitive construction projects. The detectors can be fitted to every interlock, or every second interlock for double piles, or, when the driving process is appropriately monitored, only to every nᵗʰ pile.

Operating principle

The shear sensor reliably and simply monitors the integrity of the sheet pile wall, independent of sheet pile length. It is suited to vibratory or impact driving and pressing in dry soil as well as under both fresh and salt water conditions using a specially developed technique. 

A shear sensor is welded at a distance of 0.5 m or, if necessary, more above the toe of each single or double pile and a monitoring cable is routed through a protective tube fixed to the pile all the way up to its top. A flexible protective sheath at the top of the cable tube prevents the cable from wearing through. 

The cable is connected to the control box by means of push-button clamps. The inserted shear sensor is damaged (i.e. sheared or bent) by the following pile (Fig. 1.) if the pile has not declutched. The control box provides a visual display of shear sensor status.

Instructions

Sensor with shear pin 

The shear sensor is installed inside a metallic protective casing which is welded in the area of the toe of the monitored sheet pile. The shear sensor comprises a pin which, if it has been correctly installed, protrudes into the interlock space of the pile. If the following pile remains properly clutched during driving, then the pin is sheared-off or bent. 

Connecting cable with protective tube 

The shear sensor cable is routed right up to the top of the pile through a protective steel tube welded to the sheet pile. At the top of the tube, a protective sheath prevents wear of the cable.