Steel Tubular Piles know many applications. For example, they can be used for combined walls, fender walls, auxiliary structures, such as foundation piles for engineering structures or as casing when drilling to install geothermal heat pumps. For many years now, Grand Piling has been installing tubular piles (by means of pile-driving, vibrations and, more recently, also vibration-free) for an extremely wide range of applications; consequently, this has become one of the areas in which we specialise.
A (tubular-pile) combined wall is a wall consisting of both sheet piling and tubular piles. The tubular piles provide increased strength and rigidity when compared with a situation in which only sheet piling is used. The tubular piles are equipped with interlocks that connect together the sheet-piling profiles. Once all the tubular piles have been installed, the interspaces can be filled with ordinary Z or U sheet-piling profiles.
Combined walls are often used in quay construction for water-related infrastructure. Consequently, Grand Piling can expertly execute such operations on the water using its own floating equipment. Furthermore, combined-wall constructions are also employed in earth-retaining and water-retaining constructions in order to complete cofferdams, which require deep construction pits. Combined walls are often used as well when making tunnels.
(This article comes from Sterk editor released)
A chill ring includes a cylindrical non-consumable base metal ring having an outside diameter sized to fit adequately inside the diameter of the pipe end to be welded.
Conical points are used to push the earth aside and maintain grinding. On rough surfaces, the point distributes the load around the entire pipe, rather than focusing the shock on only a section.
A open-end cutting shoe is an exceptionally tough, heat-treated cast steel shoe with a ledge to ease driving. Use of a cutting shoe protects the pipe end and makes it possible to use a thinner pipe.
Pipe caps are available in all standard sizes ranging from 8 5/8″ to 72″.
Pipe piling splicers are available in all pipe sizes. Pipe splicers help ease alignment of pipe and drive it with no welding required.
(This article comes from R.W. CONKLIN STEEL editor released)
Tie rod systems cover several steel grades with yield strength ranging from 355 to 700 N/mm², and diameter up to 160 mm.
Various articulated joints can be used to accommodate the project requirements ensuring compatibility with any sheet pile profiles, pile walls, combi walls or concrete diaphragm walls.
Tie rods system can also be supplied with a full range of corrosion protection solutions, prefabricated waling beams and related accessories.
- Flexibility of the system with various articulation solutions such as captive nut, swivel nut, ball cage, hinge coupler, angle seating…
- Ductile design.
- Quick installation.
- Pre-tensioning applicable.
- Full range of accessories for specific applications.
(This article comes from Dextra Group editor released)
Steel tie rods solve the age old problem of roof construction; they hold the walls from bending out as the roof is loaded with wind or snow. In age old timber frame buildings, like the gothic cathedrals of the middle ages, enormous stone buttresses stabilized the walls – allowing for graceful arched beams to create a beautiful timber ceiling.
The buttresses eliminated the need for a bottom chord on a timber truss, which gave the truss a great open feeling. Today, many people want that great open look inside their homes and churches, but don’t want to go to the expense of building buttresses. A steel tie rod is the solution. It acts as the bottom chord of the truss and give a very open and light feeling.
(This article comes from Vermont Timber Works editor released)
Among the essential characteristics of Z-shaped sheet piles are the continuous form of the web and the specific location of the interlock symmetrically on both sides of the neutral axis. These two attributes have a positive influence on the section modulus. Z-shaped sheet piles present the following advantages:
- extremely competitive section modulus/mass relation
- increased inertia and thus reduced deflection allowing the choice of high yield strength steel grades for the most economical solution
- large width resulting in high installation performance
(This article comes from Piles&Machinery editor released)
The essential characteristics of the Z sheet pile are the continuous form of the web and the specific location of the interlock symmetrically on both sides of the neutral axis. Both aspects have a positive influence on the section modulus.
The AZ series, a combination of a section with extraordinary characteristics and the proven qualities of the Larssen interlock, has the following advantages:
– an extremely competitive section modulus-to-mass ratio.
– increased inertia, reducing deflection and allowing high-yield steels to be used for the most economical solution.
– large width resulting in good installation performance.
– good corrosion resistance, the steel being thickest at the critical corrosion points.
(This article comes from ArcelorMittal editor released)
Worldwide cold formed steel sheet pile is set to overtake and out-produce hot rolled steel sheet pile in harbors, shipyards, docks, and water treatment plants from Singapore to North America.
Since cold formed steel sheet pile was introduced over thirty years ago, there are now over a dozen mills producing cold formed steel sheet pile worldwide compared to a half dozen hot rolled mills worldwide. Over a million tons of permanent and temporary projects have been supplied in North America alone for every type of soil condition including driving in extremely hard glacier tills, coral, cemented sands and heavy clays. In fact, cold formed piling has never had a propensity to drive out of the interlocks like many hot rolled sheets in difficult driving conditions.
Some reasons cold formed is proving to be superior to hot rolled:
- Cold formed costs less. Because of the economically efficient process, cold formed has been selling for approximately $200 to $400 dollars a ton less than hot rolled.
- Cold formed created many innovations in the pile industry such as wider, deeper, multiple thickness sections.
- Cold Formed offers greater flexibility and additional savings in selecting exact lengths; whereby most hot rolled mills offer only 5� increments or cannot not roll less than 20� lengths. In many projects this flexibility can produce 25% savings in material.
- Many sections of hot rolled are rolled infrequently and customers are at the mercy of hot rolled mills arbitrary rolling schedules. Cold formed mills have the ability to economically change over to roll other sections, allowing for faster schedules on small orders and increased savings in project production scheduling.
(This article comes from Piling and Equipment editor released)
The elements of a tubular combined wall system are the tubular king piles, C9 connectors and AZ sheet piles. The tubular king piles can be spiral welded or longitudinally welded, and manufactured from a wide range of steel grades, thicknesses and diameters to suit variable design requirements. C9 connectors are welded longitudinally to opposite sides of the tubular king pile to provide the connection point for the infill sheet piles. The AZ sheet piles interlock with the C9 connectors and are driven between tubular king piles as infill sections.
Structurally, the tubular king piles fulfills two functions:
- As retaining members, they resist horizontal loads resulting from earth and hydrostatic pressures
- As bearing piles, they resist vertical superimposed loads.
The intermediate sheet piles have only an earth-retaining and load transfer function and they may be shorter than the king piles.
Features and points for consideration with the tubular combined wall systems are:
- Tubular king piles facilitate the option to drill internally to advance driving in difficult conditions.
- Tubular king piles provide an opportunity to pour concrete inside the king pile creating a composite structure.
- Accurate alignment of the C9 interlock on the external surface of the tubular pile is critical to successful driving of the infill sheet piles. Grinding of external welds on the tubular pile is necessary to ensure consistent surface profile.
- Control of the tubular king pile alignment during driving will usually result in the guide frame generating forces on the C9 connectors, hence weld quality of the connectors is a critical requirement (Some contractors prefer the HZ/AZ combination which eliminates this issue).
(This article comes from J Steel Australasia editor released)
A HZ/HZM combined wall system consists of the king pile, connectors, and AZ sheet piling installed between king piles are intermediate infill elements. The HZ/HZM beams can be single H beam or double H beams or even continuous H beams. The HZ/HZM king piles can be retaining wall elements, which resist horizontal loads or bearing piles, which resist vertical loads. While the intermediate sheet piles normally only resist the earth retaining functions or load transfer to the HZ/HZM king piles. The intermediate sheet piles can be shorter than HZ/HZM beams. Depending on the number of interlocks and king piles, HZ combined wall system have 4 different combinations: Combination 12, combination 14, combination 24, combination 26. In theory, the intermediate pile can be any AZ type sheet piles. While in practices, most intermediate sheet pile is AZ18-700 or AZ26-700,others like AZ13, AZ13-10/10, AZ18, AZ18-10/10,AZ26,AZ13-770, AZ14-770-10/10, AZ18-700, A20-700.The connectors are RZD,RZU,RH type depending on connecting elements.
Previously HZ sheet piles was the most popular solutions for permanent ports, quay wall, cofferdam, slope stabilization, wharf contstuctions etc heavy load applications, Nowadays almost all HZ combined walls are HZM sheet pile system.
The combined walls or combiwalls are normally a more economical solutions than sheet pile with tubular pipe combined walls. Various steel grades are available for combi walls and king piles.
The revolutionary HZM/AZ wall is an extremely economical combined wall system launched in 2008 to replace the former HZ/AZ system, and consists of:
- HZM™ king piles
- A pair of AZ® sheet piles as intermediary elements
- Special connectors (RH, RZD, RZU)
The HZ king piles, with milled grooves on the flanges and thicknesses up to 40 mm, fulfil two different structural functions:
- Retaining members for soil and hydrostatic pressures
- Bearing piles for vertical loads.
The combinations are based on the same principle: structural supports comprising 1 or 2 HZM king pile sections altering with or without intermediary double AZ sheet pile sections. The intermediary sheet piles have a soil-retaining and load-transferring function and are generally shorter than the HZM king piles. Depending on the combinations and steel grades adopted, the achievable bending moment capacity lies above 21,000 kNm/m (Section modulus up to 46,500 cm2/m).
The outstanding feature of the HZM/AZ combined wall system is the extensive range of possible combinations using the entire AZ sheet pile offer including the latest wide AZ-700 range, as well as all rolled-up and rolled-down AZ sections.
(This article comes from Oriental Sheet Pilling editor released)