The future of Steel Sheet piles

Grand Piling constantly developing and enhancing the range of steel sheet piles. By 2018 some new families of Z type sheet piles will be introduced .Also value added services as design services, crimping and welding of steel sheet piles , painting and application of sealant will be offered.

Within the coming years we will establish a full range of U and Z type sheet piles, from light to heavy, to strengthen their global position as a manufacturer of steel sheet piles.

This article comes from emiratessteel edit released

Box Sheet Piling – Steel Structures

Hot-rolled steel sheet piling is more extensively used nowadays in permanent as well as temporary retaining walls. Applications are not only above-ground earth-retaining structures but also composite basement wall construction, urban railway and road cuttings, bridge abutments, river bridge pier caissons, as well as the traditional river and coastal protection works. Economic design is enabled by better knowledge of soil–structure interaction and highly developed design and analysis programmes.

Box piles are particularly suitable for marine structures, such  as jetties and dolphins, where part of the pile shaft is exposed above seabed level and the pile functions as a free-standing column or is connected at the head in clusters of columns.

Box piles are formed by welding two or more sheet pile sections together. Both Larssen and Frodingham steel sheet piles (see section 29.2.3) can be used.They can be introduced into a line of sheet piling at any point where local heavy loads are to be applied, for instance beneath bridge beams, or used separately.They are clutched together with adjacent sheet piles and can be positioned in a sheet pile abutment so that its appearance is unaffected.

Larssen box piles are formed by welding together two sheet pile sections with continuous welds, and Frodingham plated box piles are formed by  continuously welding a plate to a pair of interlocked and intermittently welded sheet piles (see Fig. 29.2).

Special box piles can be formed using other combinations of sheet piles.

20170927Fig. 29.2 Box piles

(This article comes from thecivilbuilders.com editor released)

Jiaxing Port and Hanghang used the new type of revetment of steel sheet piles in channel maintenance for the first time

April 20, Zhejiang Province, Hong Kong Shipping Administration Bureau held a Jiaxing Jia Jiesu submarine waterway maintenance project seven design review. Participants were representatives of provincial and municipal units and invited experts. Experts and representatives attended the meeting and listened to the design documents of the design units. After careful discussion and put forward specific suggestions for revision, they considered the cost, resettlement, construction and environment And other factors that the application of sheet pile revetment in the project is feasible, the design documents are basically in line with national and industry related technical standards and norms, in principle agree with the design documents, marking the new steel sheet pile revetment in the province River Waterway maintenance for the first time.

With the development of large-scale ships, the northern suburb of Zhajiasu line (coincided with the section of Hangzhou-Shanghai line) can not adapt to the social and economic development. The new revetment of the steel sheet pile construction is located in the Hebei section of the northern suburb of the Zhajiasu line. The newly built revetment is about 2.8 km. The old bank revetment will be carried out after the existing bank protection piles are finished. The flood control along the route will be ensured. drop to lowest. The implementation of the project will significantly improve the navigable conditions of the waterway and enhance the traffic capacity, but also prevent soil and water loss along the cross-strait, and further improve the flood control capacity along the strait to promote the protection of the ecological environment.

It is reported that the steel sheet pile revetment has a strong bearing capacity, its own structure is light, steel sheet pile composed of continuous wall has a high strength and rigidity, steel sheet pile connection junction lock tightly, can effectively prevent soil erosion, construction is convenient , The vibration is small, the time is short, the height is restricted and so on the special flight section may use then the pile, compared to the original cast-in-place bored pile and the sheet pile structure has the higher economy, to the geology condition request is lower, More options for revetment structures are provided during the implementation of the standardized channel maintenance.

Pile Supporting Measures in Steel Sheet Piles Construction

1. Water impulse method

Pile tip set high pressure water nozzle. High-pressure water jet loosens the soil and loosens the soil and rock, reduces the resistance of the pile tip and reduces the friction between the pile surface and the buckle, which makes it easy to pile and reduce the damage of pile and equipment.

2. Pre – drilling method

Pre-drilling can reduce soil resistance:

It is generally effective to drill a hole having a diameter of about 30 cm at the center of the pile width or to loosen the soil with a twist drill.

3. Blasting

This method is applicable to soils where it is difficult or impossible to construct steel sheet piles (H-piles, box-piles or pipe piles).

Common Blasting: Explosion creates a V-shaped groove in the pile wall. Piling conditions in loose soil areas are still difficult, as it is recommended to strengthen the pile tip.

Impact Blasting: The solid rock into fine particles, but does not move it, the impact of the rock is small.

Bridge Construction: Precautions and Measures of Leakage Prevention and Seepage Prevention of Steel Sheet Piles

  1. The whole process of applying steel sheet pile must be well positioned and strictly controlled the bidirectional verticality so that the pile and the pile have good bite, key.
  2. Pit pumping, the lock is not a mil for the phenomenon of leakage, the use of fiber-rich cotton batten to sew.
  3. The wider the pile can be taken to fill the butter plug with mastic stem water can also be taken with fly ash, saw wood foam, expansion of cofferdam along the cofferdam along the pile surface along the flow direction of the comprehensive treatment method to To stop the purpose of water.

Can also be found in the pumping position after the lath, cotton, linen, etc. in the inside of the sheet pile impaction, or in the leak outside the water throwing ash mixed sawdust at the end. We have done before the time directly in the sewing sawdust at the end of the plug.

Cold formed Z profile sheet pile

Z profile steel sheet piles are call Z because one single sheet pile stands like the letter. Cold formed sheet piling is also produced through a series of rollers, by which the Z shape is formed gradually with uniform thickness along the full length of the profiles. The thinnest Z type  sheet piling might be only 3mm thickness. 15 years ago, cold rolled sheet piling manufacturer was only in Europe, today most  sheet piling is produced in China, especially heavy gauge sections. Clutches are located on both sides far from the neutral axis, which provide maximum use of the materials and also good for a bigger modulus of section. Like all other cold rolled metal sheet piles, Z sections can also be produce in any possible width, height, thickness. OZ sheet pile, PAZ sheet pile, all other sheet piling specifications and dimensions are all no problem. Different from hot rolling technology, in which the profiles can form the shape in mills, cold forming needs another process of rolling and forming, the maximum thickness for cold rolled Z type sheet pile is 16mm.

In Asia, U type steel sheet pile is still the tradition, but more and more jobs, especially wharf constructions, deep foundations, seawall, bulkheads requires Z sizes. Now in Europe, especially western Europe, sheet pile contractors prefer Z profiles. HZ combined wall, OZ sheet piles and tubular combined walls all use Z types.

Advantages

1、Excellent properties with high tensile strength. Interlocks are located away from the neutral axis, which is good protection for the cold rolled interlocks, giving optimized profiles for higher strength and lower material weight.

2、Capable of saving steels economically. Compared with U type steel sheet pile, Z type sheet piles always has smaller weight when modulus of sections are similar.

3、High installation performance with large width, We can produce length up to over 50m,and thickness up to 16mm,varied width, and height. over 200 different sizes of steel sheet piling.

4、Z profile sheet piling are normally installed and driven in welded or crimpled double, which will give a greater system width, compared to U profile sheet piles This also means reduced handling and installation time. Less number of interlocks per linear meter is good for water tightness.

(This article comes from cn-steelsheetpile.com editor released)

U-shaped steel sheet piles

U-shaped steel sheet piles have long been familiar to designers and constructors because of the long-standing traditions and technologies, and are widely used for permanent structures, temporarily installed soil-retaining construction, and temporary coffering.

Driving method

The following methods are generally available for the construction of steel sheet piles.

  • Vibro-pile driver : Short-term construction, economic efficiency, water’s edge construction, non-necessity of special machinery
  • Vibro-pile driver using water jet cutter : for hard ground and soft rock
  • Hydraulic pile driver: Low vibration/noise construction, narrow space construction, and neighboring construction
  • Hydraulic pile driver with earth auger : Low vibration/noiseconstruction with hard ground

(This article comes from nssmc.com editor released)

Correction urban trunk support excavation of steel sheet piles

Steel sheet pile as materials used multiple times turnover, in the course of deformed sheet pile will occur should be corrected and repair damage before use. Its correction and repair methods are as follows:

⑴. Surface defect repair: cleaning of defects near the surface rust and oil, and then use the welding repair method for fill level, and then polished wheel.

⑵. End flat correction: using oxyacetylene cutting end portion of the pile, so that a plane perpendicular to the axis ends, and then use the wheel to be polished cut surface finishing. When dressing small amount, the wheel can also be used directly for repairs.

⑶. Pile deflection correction: ventral bending correction ends fixed to the support point, jacking cold bending correction of the steel sheet pile hump. Lateral bending correction is usually carried out in a special corrective internet. Without correction conditions, the general existence of such problems pile disuse.

⑷. Pile distortion correction: This correction is more complex. ③ visual distortions using the above method to correct.

⑸. Piles local deformation correction: the local deformation of the pressure and heat drying using oxyacetylene jacked sledgehammer hitting a combination of methods to correct.

⑹. Locking distortion correction: As a standard sheet pile locking plastic mold, using slow traction hoist adjustment processing, or using oxyacetylene thermal drying and sledgehammer percussion mold propulsion methods straightening process.

Permanent Sheet Pile Retaining Walls

Commonly steel sheet piles are specified and installed as the permanent retaining structure on schemes where insufficient space is available for complex temporary works which would be required to allow construction of alternative retaining solutions; or where the cost and programme benefits of permanent sheet piling dictates this to be the optimum retaining solution.

When used on road and rail infrastructure projects, the sheet piles are required to be designed to either the relevant Highway Agency or Network Rail design standards together with associated design and checking certification. Typically these specifications require a design life of 120 years together with surcharge loading relevant to the proposed application (i.e. Highway HB loading or Railway RU loading).

Other common applications include retail and commercial service yards, flood defence walls, axially loaded bridge abutments as well as any general boundary retaining wall.

Once installed excavation works can commence immediately thus eliminating any curing period which is required for alternative secant and contiguous pile walls. If required the exposed sheet piles can then be shot blasted and painted to provide an aesthetically acceptable finish and enhance the pile section design life. Alternatively a wide range of ‘non structural’ cladding solutions can be constructed in front of the wall.

In addition a reinforced concrete capping beam can be cast to the top of the sheet piles to which any containment barriers / hand railing can be directly fixed. Alternatively a steelwork capping beam can be specified.

Finally to prevent build up of excessive hydrostatic water pressures behind the sheet pile wall, drainage weep holes are formed nominally above the final excavation level. On critical applications where preventing loss of fines through the weep holes whilst ensuring any hydrostatic pressures are relieved, consideration should be given to the use of the unique ‘Blue Marlin Weep Hole Filter System’.

(This article comes from Sheet Piling (UK) Ltd editor released)

Hot Rolled Steel Sheet Pile Sections

Hot rolled steel sheet pile sections have a connection “interlock” at both ends of the section. These interlocks connect with one another to form a continuous wall of Sheet Piling. Soil conditions may allow for the sections to be vibrated into the ground instead of being hammer driven.

Typically hot rolled steel sheet piles are designed to create a rigid barrier for earth and water, while resisting the lateral pressures of those bending forces. The shape or geometry of a section lends to the structural strength.

In addition, the soil in which the section is driven has numerous mechanical properties that can affect the performance. The wall of sheeting provides excellent resistance to bending forces and is used to provide structural strength to a foundation.

U Sections
U shaped sheet pile sections are well proven in both permanent and temporary works throughout the world. Our L and STU series U sections are available in 750/700/600/500mm system widths. All U sections incorporate well-known and efficient Larssen interlocks and offers excellent sealing application.

Z Sections
Z Sections: Continuous form of the web and location of the interlock symmetrically on each side of the neutral axis provides positive influence on the section modulus on the Z section.

Special Sections
Flat sheets, Larssen L430 sheet pile sections and box piles are all types of special sections. Find out their special capabilities and how you can use them in construction.

Corner Sections
Our Corner Sections To find out more and to receive a free consultation e-mail us or call us at 1300 764 164 .

Steel Grades for Steel Sheet Piles
Conditions of supply Hot rolled steel piles are supplied according to DIN EN 10248, cold roll formed piles according to DIN EN 10249.

This article comes from ThyssenKrupp Steelcom editor released