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What is Continuous Flight Auger Piling?

Continuous flight auger piling is a specific type of piling which falls into the broader category of bored piling. Bored piling is carried out by first boring a hole in the ground for the pile to be installed in. This is different to screw piling and drive piling which have their own method of insertion for the piles. For all bored piling, bore holes are first created and then filled with liquid cement to allow it to set in place, this is done with the assistance of steel tubing to line the hole which can be removed at the end for reuse or left in place as an extra layer of reinforcement. Continuous flight auger piling takes a different approach to this method.

A continuous flight auger is a type of large-scale rotary piling equipment which will drill (or bore) the hole for the piles to be set in. Using a continuous flight auger is the quietest form of piling and produces the least vibrations, so is perfect for residential areas or any other sites where reducing noise pollution is vital. Continuous flight auger piling is conducted by first drilling a continuous flight auger into the ground to the desired depth. Once the desired depth is reached the temporary plug designed to prevent soil from entering the bore hole is removed, leaving the hollow auger open for concrete.

Concrete or grout must then be added to the hole and is injected through the auger itself, pumped down the hollow stem. The auger is reinserted for this process and is extracted as the concrete is injected. This is why it is known as continuous flight auger piling – as the auger is removed the foundational material is added, creating a continuous smooth installation effect until the surface level is reached.

With continuous flight auger piling, the most important aspect is balance. The pressure of the grout or concrete must be high enough to ensure the bore hole is filled completely but not so high as to disturb the surrounding soil. The auger must also not be extracted too quickly as this can cause soil to flood the pile shaft.

The Pros and Cons of Steel Piling

Every piling company will offer a range of materials to suit the needs of your project! The most common raw materials used in piling are timber, concrete, plastic, and steel, each with its own variations and techniques with distinct advantages and disadvantages depending on the endeavour. For example, notable benefits of using wooden piles are its relative inexpense and ease of adjustment, but these also carry the disadvantages of being easily damageable and prone to rotting.

Steel piling is undoubtedly the most permanent and secure method of setting your deep foundations, but it too comes with unique pros and cons which any project manager should consider carefully before deciding to go with steel piles. Let’s take a closer look at the strengths and weaknesses of using steel piling for your deep foundations.

Pro: Steel can bear the most weight

It’s no secret that of the materials listed here, steel outperforms the others in sheer strength. This is not to say that concrete, wood and plastic piles can’t support extreme loads, but none of these materials can match the strength of steel.

Pro: Steel piles are easily adjustable and come in many varieties

Steel piles are made in the form of thick pipes or girders which come in a plethora of cross-sections. This gives you complete freedom over the shape you use; the cross section of the pile can be chosen specifically to best fit the terrain and density of the earth. Steel piles are also relatively easy to cut to desired length, unlike precast concrete piles. Steel can also be bolted or spliced together without sacrificing too much strength.

Pro: Can be driven through tough layers and will displace less earth

Due to their superior strength, steel piles can be driven through firm earth and rock layers without fear of causing damage. The slim cross-section of steel piles is perfect for reducing the level of earth displacement, resulting in firmer earth surrounding the piles and more reliable foundations.

Con: Steel is the most expensive material

Steel is simply more expensive than the other options available, due to its more labour-intense creation and transport. This much is true especially in timber-rich areas where wood is much easier and more economical to source.

Con: Steel is likely to suffer damage from corrosion and electrolysis

In areas with high levels of ground water or with low soil PH, the chance for corrosion, oxidisation and electrolysis to occur in steel is significantly heightened. There are techniques for reducing the risk of deterioration, such as encasing them in concrete. This method allows you to maintain the core strength of the steel without the risks associated with corrosion.

Con: Steel requires a high level of care when driving

Due to their narrow shape and weight, steel piles can easily diverge from their intended angle of entry whilst being driven into the earth. While driving extra care must be taken to avoid the piles becoming misaligned and to not displace unnecessary earth during the process.

There are significant pros and cons behind every potential material and method for piling and the right one for your project will depend on the terrain, type of earth and the planned construction itself. As the best piling company in Manchester, Rhino Piling conducts a full evaluation of the site and soil before every project begins, so you know the materials we opt for are the very best for your foundations! Get in touch today to learn more!

Types of Pile Installation

Piling – the method of installing vertical poles to provide foundational support for the construction of a building or structure – has been used for thousands of years throughout human history. Since prehistoric times humans have used wooden stilts to support their homes and storage buildings. But in the modern-day we have developed many more methods and techniques for piling and now use a much wider range of materials that were available to prehistoric societies, including concrete and steel! We now even have mini piling for more awkward piling sites or reinforcing existing foundations. Let’s take a look at the methods available to us now:

Screw Piling

As the name might suggest, screw piles are shaped like a helix and are physically screwed into the ground as one would screw into wood or plaster. Screw piling has the benefits of displacing less earth as the shape is more ergonomic and fit for purpose. Screw piles also have the extra surface area provided by the screw shape itself, rather than being a simple pole. Screw piles are usually steel.

Drive Piling

Drive piling involves forcibly driving the piles into the ground, usually done with a specific machine known as a pile driver. The pile driver works by using hydraulics to lift up a heavy weight which it then uses as a hammer to drive the pile into the ground, like hammering a nail into a wooden board. Driven piles can be made from steel, concrete, or wood!

Bored Piling

Bored piles tend to fall asleep on the job. Just kidding! Bored piling refers to the process of boring a hole in the ground before installing the piles. This means you won’t displace much earth as you can remove it in advance. Pile boring is often combined with cast in-situ concrete piles as this combination compliments itself well. The hole will first be drilled into the ground before a metal casing is inserted and filled with liquid concrete! When it sets, your piles are finished.

For all your piling needs, come check out Rhino Piling! With over 100 years’ collective experience, we have what it takes to tackle piling projects of any size.

The Basics of Sheet Piling

Piling is a system of deep foundation installation done by inserting long supports, or piles, into the ground to support the foundations of a construction project or existing structure. This can be done in a variety of ways; the piles can be driven into the ground, or a hole can be bored in advance. Even screw piles exist with a helical shape that can be screwed directly into the earth!

Uses for Sheet Piles

Sheet piling works by using long sheets in place of thin poles to replace the piles in foundations. Sheet piles are most often used to provide a support wall, or prevent water damage. The benefit of sheet piles is that they can be left in place and used as interior walls, especially in basements or other subterranean levels. Sheet piles are also used to hold back water, sand, or other loose earth, to protect the construction workers from harm and the foundations themselves from damage or erosion.

Types of Sheet Piles

  • Anchored Sheet Piles

Anchored sheet piles are subjected to stress against the anchor to remove slack before insertion, so they cause less displacement and won’t disturb the integrity of soil as much. These can stay in place until creep occurs.

 

  • Cantilever Sheet Piles

Usually used for depths of six meters or less, cantilever imbedded retaining walls can be used as temporary retaining structures or permanent pile walls, depending on the needs of the project.

 

  • Cofferdams

Cofferdams are used during the construction of bridges to keep water and mud out of the excavation. Cofferdams are temporary dams that allow a site to stay dry for the duration of the project.

Advantages of Sheet Piling

  • Lightweight and easy to install.
  • Always made from steel and therefore recyclable.
  • Easy to create to custom sizes.
  • Can be spliced together to create strong and durable corner joints.
  • Requires little maintenance.

Disadvantages of Sheet Piling

  • Difficult to install in rocky areas because sheet piles cannot be installed around large rocks or boulders easily.
  • Can create loud disturbances in residential areas if installed with vibratory or impact hammers.
  • Sheets are usually used as temporary retaining walls, which means they can come with a costly removal process after the construction project is complete.

Why Is Having Proper Piling Foundations Important?

Having good quality piling foundations is a very important part of a property’s construction, as piling foundations provide the stability for the structure. If a property was built with poor piling services, then the property would sink into the ground in an uneven way, which would cause cracks and damages to the property. This is known as subsidence, and it can ruin the structure of your home! Whereas a properly built foundation would keep the property supported fully, which means no sinking or cracks.

How else can poor foundations impact my property?

As well as the sinking and damages poor piling can cause, it can also damage the value of the property when you come to sell it. Buyers don’t want to buy a house they know has problems that will need dealing with, so before even thinking about selling your house, make sure to check your property thoroughly for any problems. Needing to repair piling foundations is no small task and definitely will take a hit with the buyers offer. So, make sure you are aware of your properties condition.

What can cause piling foundation problems?

As mentioned earlier in the blog, piling foundations are extremely important for the structure of your property, so it is important to know what can cause problems with your foundations to be able to prevent them.

It is very important to make sure you have proper drainage set up on your property, as soil can move when oversaturated with water, having proper drainage set up will be able to distribute water so the soil does not swell and cause an unstable foundation. This is the main cause of unstable foundations, so it is important to make sure you have proper drainage around your property.

The weather is another way in which the soil can end up causing unstable foundations for your property. Hot and dry weather can cause soil to shrink around the foundations which will cause movement in the foundations, this problem will only really affect poorly installed foundations so make sure to hire a professional, reliable company.

If you are looking for a professional and reliable piling company, then make sure to check out Rhino Piling who offer amazing piling services.

What Are Bored Piles?

Piling is an ancient technique for supporting the foundations of a structure with long stilts or ‘piles’ which sit vertically underneath a construction. The oldest use of piles can be found in prehistoric piled dwellings in the alps, when ancient humans used piles to lift their homes away from the watery earth in swamps and wetlands. Modern piles are much different, but still use the same principles! Piling can be done in a number of different ways, from driving them into the earth to casting them in place. Today we’ll be looking at bored piles – not that they’re tired and uninterested, but that they are installed by first boring a hole into the earth for the pile to be placed into. Bored piles have a variety of advantages and disadvantages, let’s take a look:

Created from concrete

Bored piles are created from concrete. Unlike driven piles which can be concrete, steel, or even wooden, bored piles are exclusively cast from concrete. This is because it is easier and more effective for pre-made piles to drive or screw them into the ground. Boring a hole first would reduce much of the friction and pressure required to ensure the pile is sturdy and unwavering.

Cast in-situ

As mentioned above, pre-made (or pre-cast) piles are best used with other installation methods. Bored piles are cast in-situ, which means that the bore hole created is then filled with liquid concrete, along with other reinforcement materials, to allow it to set to form the pile in place. This is also why bored piles are exclusively concrete, as it’s either impossible or wildly impractical to pour liquid wood or molten steel into a bore hole to create a pile.

Can come with permanent or temporary casing

Cast in-situ piles have a few different sub-methods for proper installation. The casing, for example, can be made to be either temporary or permanent. The pile casing is a large steel tube which is placed into the bore hole before the concrete is poured in. A permanent casing is left in place forever to provide a metal covering for the pile and an extra layer of reinforcement. Temporary casings are left in place while the concrete sets and are remove afterwards. Removed casings can be reused or recycled but they can cause lots of noise and vibrations to remove.

Uses for Concrete in Deep Foundation Piling

Piling is the process of installing vertical pillars into the earth to support a construction. Piling has been used by human societies for thousands of years to provide the foundations for shelters and structures, from the earliest settlements built atop wooden stilts to the largest skyscrapers today reinforced with huge steel girders and tonnes of concrete. Concrete is one of the most versatile materials used in piling, and can be used to produce the piles themselves, or to support the piling process in other ways. Let’s take a look at some of the ways concrete can be used in deep foundation piling.

Precast Concrete Piles

Precast concrete piles are the most straight-forward way of utilising concrete in your piling project. Precast concrete piles are manufactured, transported, and installed in the same way as any other pile: long supports are set and inserted into the earth below your construction site.

Case In-Situ Concrete Piles

Cast in-site concrete piles work a little differently. As the name suggests, these piles are created by pouring liquid concrete into the ground to set. This is usually achieved by inserting a hollow concrete or metal tube into the earth and filling it with concrete. The tube can be left in place as further reinforcement or removed if preferred.

Reinforcing Wooden Piles

Concrete has more uses in piling than for the piles themselves! Concrete can be used to reinforce existing piles of any material. This is most vital with wooden piles, which are more economically friendly than other materials but also bear the least weight. Setting concrete around your wooden piles is the perfect way to reinforce them and protect them from rot and warping.

Preventing Corrosion of Steel Piles

Like wooden piles, concrete can also be used to support the usage of steel piles. Steel piles easily top the strength scale of piling materials, but can be vulnerable to rust and erosion due to moisture, oxygen, or extreme Ph levels in the soil. Setting concrete around steel piles gives an extra layer of protection against corrosion and oxidation!

Concrete is a marvellous material for deep foundation piling and can be utilised in a wide variety of ways. If you’d like to identify the best materials for use in your foundations, get in touch today to start off your construction with a full on-site evaluation done by our expert team! If you’re looking for a piling company with industry expertise to provide you with bespoke service, look no further than Rhino Piling!

Is Mini Piling Suitable For Your Project?

Piling is the process of installing deep foundations for a construction project or preexisting building by placing long pipes or girders vertically into the ground underneath the structure. Doing this helps in establishing a strong and reliable foundation for the building. Piling as a method of foundation building was invented in the 1800s by Alexander Mitchell, a blind Irish civil engineer. Since then, piling has grown to incorporate a wide variety of materials and techniques designed to suit differing terrains, types of earth, and building sizes. One (relatively) recent addition came about in the 1950s: mini piling.

Mini piles – sometimes called micro piles – are, as you might expect, smaller versions of the hefty pipes or logs used in traditional piling. Mini piling was invented in Italy in the post-war period in direct response to the significant damage caused to prominent buildings in World War II. Mini piling employs the use of far narrower piles reinforced with concrete. Mini piles can be driven or screwed into the earth, depending on the project, and can reach depths of up to 200ft and bear over 200 tons.

So what benefits can mini piling offer? 

Smaller and lighter

First and foremost, the smaller nature of mini piles makes them quicker and cheaper to make and transport, and easier to haul to remote sites, sites with difficult ground conditions, or sites with limited room for manoeuvring. 

Versatile and adaptable

Due to their smaller size and lower weight, mini piles are much more suitable for adapting to uneven terrain, making them perfect for reinforcement on slopes or embankments and areas with high seismic activity. They’re also excellent for reinforcing or repairing existing foundation structures, true to their origins!

Relatively inexpensive

Mini piles are cheaper to manufacture, transport and install than their traditional larger counterparts. This means most projects could see some economic benefit from opting for mini piling over full-sized! This benefit will be more significant for construction in more difficult regions as costs can be saved at every step of the process. 

Mini piles aren’t suitable for every project, but they are worth considering if just for the financial benefit alone! When considered along with quicker and smoother transport and installation, the benefits of mini piling are easy to see! Are mini piles right for your construction project? Get in touch with Rhino Piling today for a full on-site evaluation, and the best piling services Manchester has to offer!

Why Choose Mini Piling?

Piling is the traditional and long-standing method of building deep foundations for construction. Piling has been around for much of human history, with the oldest piled settlements dating back thousands of years! The process of piling involves installing long stilts or columns into the earth for your construction to be built upon. This allows the weight of the building to be supported by firmer, stronger earth below the loose dirt on the surface, providing strong foundations for large projects. Piles can be made from wood, concrete, and steel, and can come as individual piles or as sheets to implant into the ground. Piles can be reinforced with concrete or set on rock layers for even stronger foundations.

Mini piling is newer than its traditional counterpart, but is a well-established practice nonetheless! Mini piling uses smaller piles that can be more easily manufactured and transported, lowering costs involved with the project and reducing your construction’s carbon footprint. Due to their smaller size mini piles can also be installed at odd angles or in places with very little room to manoeuvre, and are perfect for remote, difficult to reach sites or construction taking place on rough uneven terrain.

Mini piling is generally more versatile and adaptable than full-sized piling and is applicable to a wider range of projects! Some constructions simply require the brute strength of traditional piles, like huge industrial buildings or residential skyscrapers, but these projects won’t usually be found in places that specifically benefit from mini piling.

If your project can be found on this list, you could definitely benefit from considering mini piling over traditional full-sized piling for your foundations!

• Remote sites
• Difficult terrains
• Sites with restricted space
• Pre-existing buildings with piles that need replacement or reinforcement
• Projects where cutting carbon emissions is paramount
• Any project looking to make economic savings

 

Here at Rhino Piling we have over a hundred years’ collective experience between our team, so you know you’re getting absolute expertise on all your piling services. We start every potential project with a full evaluation at your site, so we can guarantee the correct product and service for your needs.

The Different Types of Concrete Piles

Piles come in a variety of different materials. Timber, steel, and concrete are the most common materials to use in piling; each has its own advantages, disadvantages, and methods best suited to the material’s properties. Concrete, being the only material that is convenient enough to use in liquid form, is more versatile and thus has a wide array of methods available. Let’s take a closer look:

Precast

Precast concrete piles are made in advance and then inserted into the ground, as you would with a wooden or steel pile. They can be installed two ways:

Driven

Driving a concrete pile done with a large machine called a pile driver. This machine will use a weight to hammer the pile deep into the earth.

Bored

Boring a concrete pile involved drilling a hole first and removing the excess earth before inserting the pile into the pre-carved hole.

Cast In-situ

Cast in-situ piles are exclusive to concrete and are done by drilling a hole in the earth to the desired depth, then filling the hole with liquid concrete, allowing it to set in place. Cast in-site concrete piles have a variety of options depending on the needs of then project:

With casing

Sometimes when casting concrete piles in-situ, a cylindrical casing is first inserted into the ground to provide a convenient space to fill with concrete. The casing itself can be either driven or bored into the ground and can be left in place permanently or removed once the concrete is set!

Without casing

Concrete piles can be case in-situ without a casing! If the ground conditions are right and the hole isn’t at risk of collapse or filling with water or mud, then you can cast your in-situ piles by pouring your concrete straight in! One downside of this is that you cannot inspect the pile after it has set.

With cage

Cast in-situ piles are installed with a reinforcement cage made of steel to provide core strength for the pile. These cages are inserted into the casing or hole before the concrete is added, allowing it to set around the bars. Cages can be premade and transported to the site, or made as required during the piling process.