Vibratory driving

Vibratory driving is one of the most important methods used in specialized civil engineering. It is based on the principle of turning the soil into a quasi-liquid state by vibrating the pile section. The vibrations reduce the skin friction of the pile section and allow rapid driving progress. Vibrators can be leader-guided, free-riding or mounted on an excavator.

Vibrators

Vibrators and power packs are part of the typical set-up of a state-of-the-art system. The power pack is driven by a diesel engine and delivers the flow of oil for the vibrator via hydraulic pumps, thereby ensuring that the vibrator receives the constant supply of energy needed to vibrate the sheeting pilings into the ground.

thyssenkrupp-series with fixed eccentric moment
Müller vibrators with constant amplitude – straightforward to use and robust. That is the foundation for good results in moderately difficult driving conditions. These vibrators are fitted with eccentrics that generate a fixed eccentric moment. With force-feed lubrication and oil cooling, this series is equipped for applications in extreme climatic conditions.

Applications
- Soils with light to moderately difficult driving conditions
- Driving and extracting tubular piles
- Also in extreme climatic conditions

Advantages
- Extremely robust machine design
- Easy handling and easy adjustment of clamping devices



HHF series with stepwise variable eccentric moment – two in one
The vibrator can be adapted quickly to different soil conditions by a simple system of adding or removing weights, allowing the eccentric moment to be varied. For example, if high frequency is required for work in loose sand, the additional weights can be removed simply on site to achieve high frequencies with the same centrifugal force.

Applications
- Soils with moderate to heavy driving conditions
- Suitable for heavy piles

Advantages
- Adding or removing weights
- Quick changeover
- Quickly adapted to different soil conditions



HFV-series – variable and resonance-free
The vibrators of this series ensure maximum performance for minimum ground vibration and are therefore ideal for applications in inner-city civil
engineering works or in areas sensitive to vibration – guaranteed by the resonance-free starting and stopping. In addition, the amplitude can be infinitely varied during operations. The natural frequency of the soil can therefore be taken into account – driving proceeds effectively and at the same time with little vibration.

Applications
- Inner-city civil engineering works
- Areas sensitive to vibration
- Chiefly sandy soils

Advantages
- Minimal ground vibrations
- Optimum adaptation to soil conditions
- Technology that’s easy-going on equipment and environment

Excavator-mounted vibrators

MÜLLER vibrators have a proven track record that stretches back more than 50 years. They have been successfully used in innumerable civil engineering projects. Their diverse range of applications, their proverbial reliability, and constant technical improvement have made then almost indispensable tools in practical daily use. They can be equipped with specially designed devices to suit every application, such as free-riding systems, excavator-mounted vibrators, or mast-controlled units.

The compact, lightweight MÜLLER excavator-mounted vibrators can be attached to all common excavators. The power comes from the on-board hydraulics and the units are controlled by the excavator’s control levers. Various models (HFB, HFBV, HFBS) and useful accessories are available to suit the most diverse applications.

Applications
- General driving, extracting and compacting work (MS-2 to -9 HFB)
- Suitable for sheet piling and tubular piles with a modified clamp arrangement (MS-4 -6,-7 and 9 HFB)
- Installation of plastic and timber piles, lightweight sections, reinforcing cages (MS-1 HFB)
- For vibration-sensitive projects or inner-city areas (MS-5 HFBV, MS-7 HFBV, MS-8 HFBV, MS-10 HFBV)
- Jobs in heavy soils (MS-9 HFB, MS-17 HFB)
- Pile sections can be picked up and set down directly with the clamp (MS-4 to -7 HFBS)

Leader-mounted vibrators

MÜLLER leader-mounted vibrators are the specialists for tight corners. They are mounted on leaders and offer contractors an adjustable moment plus resonance-free starting and stopping.

Applications
- Driving and extracting sheet piles, tubular piles and thyssenkrupp-sections
- Foundation methods such as compacted gravel or sand columns
- Driving and extracting single sheet piles with small dimensions

Advantages
- Compact design
- Driving and extracting on cramped sites
- Resonance-free starting and stopping
- Minimum vibrations and emissions

Drill drives

These robust, low-noise drilling units are quickly and easily attached to the stick of an excavator. Attachment to a leader or fitting in the clamp of a vibrator are available as options.

Applications
- Pre-drilling to loosen and relieve the ground
- Heavy soils

Advantages
- Various mounting options
- Fast, cost-effective drilling
- Powerful, robust, long life

Power packs

Power packs are needed to drive hydraulic vibrators. Inside a soundproofed housing, a diesel engine drives the hydraulic pump that ensures the necessary flow of oil (required by the hydraulic motor) via hoses to the vibrator.

Every integral diesel engine is a low-noise, low-maintenance unit complying with the latest emissions regulations. Operations can be optimized and monitored via a programmable control connected via cable or a radio link. As an option, operating parameters and machine data can be called up remotely via a data modem.

Advantages
- Small, lightweight design with closed oil circuit
- Good reliability thanks to the use of diesel engines, pumps, controls and other components all well-proved in on-site operations
- Comprehensive range of accessories, e.g. teleservicing package, winter package, or bypass fine filter

Clamping devices

Clamping devices connect the pile section, e.g. thyssenkrupp-sections or tubular piles, to the vibrator and transfer the vibrations. All units can be rotated through 90° for face working. Adapter plates are available to cope with different clamping arrangements. Clamps to fit over the interlocks of double piles and radial clamps for driving tubular piles are also available. Important for making the right choice: the clamping force of the clamping device must be at least 1.2 times the centrifugal force of the vibrator.

Applications
- As single and double clamps for U-/Z-sections, thyssenkrupp-sections and tubular piles
- As special clamping devices for specific tasks, e.g. timber piles, concrete piles and small-diameter tubular piles

Special equipment

Compactor plate
Compactor plate for compacting surfaces. Can be clamped quickly and easily into the clamping unit of a MÜLLER excavator-mounted vibrator.

Adapter plates
Adapter plates and double clamping units for clamping small pipe diameters with MÜLLER excavator-mounted vibrators.

Special construction
Special construction for driving pipes with a large diameter and weight.

Data collection
For controlled placement of the piling element when working in vibration-sensitive areas. Collecting, recording, analysing and storing of pile-driving data.

Simulation
Simulation of static and dynamic loads on new and extension rail tracks.

to top