Corrosion Protection for Permanent Strand Anchors

The same principles of corrosion protection for Permanent Bar Anchors apply for Permanent Strand Anchors, to ensure durability throughout the lifespan. For Permanent Strand Anchors, Double Corrosion Protection is achieved by two independent layers of plastic sheathing as follows:

Bond Length

Two concentric corrugated plastic sheaths (typically factory pregrouted).

Free Length

Individual plastic sheaths (smooth) for each strand, all enclosed within a common external corrugated plastic sheath. Protection at the anchor head is provided by a fully enclosed assembly. Borehole grout is not recognised as a corrosion protection barrier by current anchor standards (BS8081 or EN1537) . Anchors are factory assembled and coiled (except for pregrouted bond length) prior to delivery.

(This article comes from DYWIDAG-Systems International editor released)

Advantages of Using Techno Metal Post Helical Piles

Recognizing the application and use of these steel metal posts, Techno Metal Post’s helical pile is screwed into the ground using proprietary machinery until the bearing capacity required for your structure is achieved. The advantages to using Techno Metal Post’s helical piles are the following:

  • Rapid installation
  • Ready to build on immediately
  • No excavation
  • No concrete required
  • Removable
  • Minimal environmental impact
  • Low footprint on the job site
  • Immediate load carrying capability
  • Installation at remote locations or at sites with limited access
  • Installation monitoring and verification of load capacity during installation
  • Installation in high groundwater conditions
  • Wide range of soil and load applications
  • Modular construction, screw piles and helical anchors are fabricated in sections giving a modular type of construction meaning that it is easy to extend or reduce the length of the installation as needed to suit the site conditions and the design requirements
  • Installation is not weather dependent, most installations can proceed even in marginal conditions
  • On tight construction schedule’s where the rest of the project depends on the installation of the foundations or anchors such as emergency response
  • Cathodic Protection System can be added to increase life expectancy of helical piles
  • Low noise level associated with installation
  • Installation produces minimal vibrations and ground disturbance
  • ABC Deck Application
  • Tight Access
  • Proprietary equipment that allows installation of helical piles indoors due to our equipment having an electric motor option
  • Our specifically designed heavy-duty polyethylene sleeve encases the post and prevents it from being affected by ground movement.

(This article comes from Techno Metal Post editor released)

History of Helical Piles

Helical piles also known as screw piles, screw cylinder anchors and helical foundations started to be used in 1836. This revolutionary engineering technology was discovered and developed by Alexander Mitchell and became utilized as a successful foundation for lighthouses, bridges and piers.

After over 170 years of development and use, these helical foundations are successfully used throughout the world to support anything from small residential applications to supporting a variety of large-scale civil engineering structures. Deck footings, fence post bases, pier footings, metal post foundations for a porch or solarium, ground screw anchors to support an addition to a home are some of the more common residential applications. Helical piles are a foundation technology and can be considered for use in any application requiring a foundational support.

According to The Newcomen Society for the Study of the History of Engineering & Technology, helical and screw pile foundations are considered perhaps the single most important development in geotechnical engineering foundation construction of the mid to late nineteenth century. They made the construction of lighthouses possible in locations where there would otherwise undoubtedly have been a great loss of life and property; they made the construction of bridges possible in locations where they might not have been constructed for another 40 years; they made the construction of oceanfront pleasure piers an industry that would irreversibly change the leisure time of an entire nation.

(This article comes from Techno Metal Post editor released)

Half – screw Pile and Its Pile Method

Involving semi – screw pile and its pile method. Half screw pile, composed of two parts, the upper part of the linear structure, the lower part of the screw-type structure. The pile can be divided into two types of cast-in-place and prefabricated, whether it is cast-type, or prefabricated, piling methods are relatively simple. The invention has the advantages of no noise pollution, no vibration pollution and convenient construction prospect, and the pile has the following advantages: satisfying the characteristics of the stress in the upper part of the pile and improving the bearing capacity; the amount of the concrete is lower than that of the pile Other concrete piles, can save more than 30% of the cost.

Hot-rolled sheet pile Z sections

Applications in construction

  • Marine engineering
  • Structures for waterways and watercourses
  • Embankment protection
  • Transport infrastructure construction
  • Trench shoring
  • Excavations

Advantages

  • Low interlock friction
  • Reduced deflection
  • Minimized handling costs
  • Optimum section modulus

(This article comes from thyssenkrupp Infrastructure editor released)

Characteristics and Applicable Scope of Reinforced Concrete Slab Piles

Reinforced concrete slab has the characteristics of simple construction, short duty cycle and so on. It has been widely used in foundation pit. However, due to the common use of reinforced concrete piles of hammering method, vibration and noise, while the process of squeezing pile is also more serious in urban engineering subject to certain restrictions.

In addition, its production is generally prefabricated in the factory, and then transported to the site, the cost of slightly higher than the pile. But because of its cross-sectional shape and reinforcement of the pile pile force is more reasonable and can be designed according to need, has been able to produce a larger thickness (such as the thickness of more than 500mm) pile. And hydraulic static pile driving equipment, so in the foundation pit engineering is still supporting the use of a wall form.

Hot-rolled sheet pile U sections

Hot-rolled steel sheet piles are mainly used for construction engineering projects, because of the high rigidity, very good driving characteristics including a high section modulus. Hot-rolled piling sections are rolled at a temperature of more than 1,200° Celsius. Consequently the steel has a high plasticity and enables multiple profile shapes.

Applications in construction

  • Marine engineering
  • Structures for waterways and watercourses
  • Embankment protection
  • Transport infrastructure construction
  • Trench shoring
  • Excavations

Advantages

  • Wide-ranging applications through outstanding structural properties
  • Optimum reuse
  • Good driving performance, good quality
  • Easy installation of anchor systems and hinged connections, even underwater
  • Good corrosion protection

(This article comes from thyssenkrupp Infrastructure editor released)

Hot-rolled sheet pile sections — Heavy-duty wall sections

Combined sheet pile walls consist of bearing piles and intermediate piles, and are used worldwide in heavy coastal engineering projects. Applications in ports include quay walls, moles, dock structures and Ro-Ro facilities. Combined walls are also used in locks, weirs, inland ports, landfills and bridge abutments.

For very heavy-duty marine applications, bearing piles are connected with the interlock section. These box piles combine high section moduli with high wall weights. For medium-duty uses in combined walls, bearing piles and intermediate piles are combined according to structural requirements. As additions to the range, new bearing piles with a higher section modulus and a new intermediate sheet pile with a system width of 675 mm have been developed.

Advantages

– Modular system, which provides options for combined sheet pilingplus optimum adaptation to suit structural and constructional requirements

– Secure, structural connections

– Good driving characteristics thanks to essentially symmetrical arrangement of pile sections

(This article comes from thyssenkrupp Infrastructure editor released)

Larssen U Hot Rolled Sections

U shaped sheet pile sections are well proven in both permanent and temporary works throughout the world.

The Larssen 755 (U shaped) profile is a wider (750mm) and deeper (450mm) section that achieves the same section modulus at a weight advantage of 11 kg/m² of wall.

Additional advantages include fewer interlocks per running metre of wall providing superior water-tightness, tie-rods are much easier to mount on the wider sections and less cost is incurred in the case of coated or sealed sheet piling sections.

(This article comes from ThyssenKrupp Steelcom editor released)

Steel sheet pile cofferdam material requirements

New steel sheet pile acceptance, should have a factory certificate, mechanical properties and size to meet the requirements. After the repair or welding of the steel sheet pile, the application of the same type of steel sheet pile for the lock through the test. Acceptance or refurbishment of steel sheet pile, should be classified, number, registration storage, lock mouth shall not be water. With a length of 1.5 ~ 2.0m meet the type, specifications of the steel sheet pile to do the standard, all the same type of steel sheet pile to do through the inspection. Check the winch or winch to pull the standard steel sheet pile from the pile head to the pile end.

Where the steel sheet pile is bent, broken, lock mouth should be refurbished, according to the specific circumstances were cold bending, hot knock, welding, riveting, cut or long. When the length of the sheet pile is not enough, the same type of steel sheet pile can be used for strength welding. When welding, the first welding or welding joints will be welded together. And then welding and hoarding, adjacent sheet pile joints should be staggered. If you need to have a pile hole and pull the pile hole, it should be a good hole before drilling, pull the pile hole should be welded to stiffen the board, so as not to pull the pile when the crack.