Pipe Piling

In recent years, offshore deepwater dock project has been massively constructed at home. As a major deep-water pier pile bearing capacity, spiral weld large diameter steel pipe piles and straight seam steel pipe commonly used. In addition, bridges, roads and high-rise buildings also need pipe piling.

Pipe weld surface shall not have cracks, broken arc, craters and holes and other defects. Presence of the defective welds allow welding, grinding or repair defects allowed. Butt weld steel pipe can be steel belt. Steel allows two pipe sections butt together. Butt welding can use submerged arc welding or manual welding process.

Pipe piling’s main production process is mainly double submerged arc welding technology. The first advantage is fully automated. The second advantage, which is carried out under the submerged arc welding, so it’s the heat exchange and protection of relatively strong performance, high quality welding out. The third advantage, because of submerged arc welding arc welding flux buried underneath, it can use high-current, high welding efficiency.

Hot Rolled Sheet Piling Into The Japanese Market

Recently, the representative of Japan’s Haneda Kosan Co., Ltd. went to Tianjin West Shares for an on-the-spot investigation. They had business meetings about the matters of Japan’s exports of steel sheet pile, and reached a long-term strategic cooperation. Japanese businessmen have to Jinxi Steel Plant H shares, H-shaped steel sheet pile Plant production site and finished products to conduct a comprehensive study of steel sheet pile. They learn more about Jinxi rolled steel sheet piling‘s production, and spoke highly of the level of internal control that the hot-rolled steel sheet pile either from the physical geometry of the surface quality and physical appearance or packaging are second to none in the world. Businessmen expressed great satisfaction, and signed on the spot of steel sheet pile sales orders. Japanese businessmen said when the steel sheet pile of this order shipped to Japan they were ready to invite major Japanese companies to observe piling piling process in order to increase the promotion and application of hot-rolled steel sheet pile in Japan.

Hot Rolled Sheet Piles vs Cold Formed

What is the difference between Hot Rolled and Cold Formed Sheet Piles?

The main difference lies in the process of which the piles are being produced. Hot rolled sheet piles are produced directly in hot form from a beam blank into its final shape. Cold Formed Sheet Piles on the other hand uses Hot Rolled Coils to roll them under pressure into its final shape in cold (room temperature) forming state. As hot rolled sheet piles are formed under heat, complex interlock shapes are therefore possible however for Cold Formed Sheet Piles, it will just be a simple hook and grip type interlock. Due to the investment required for Hot Rolled Sheet Piles and its associated machinery, there are few mills in the world who can produce such sections. EN Standard Piles are mostly produced in Europe while JIS standard Hot Rolled Sheet Piles are produced in Asia.

Feedstock of Cold Formed Sheet Piles are Hot Rolled Coils and they are largely available worldwide. Due to this availability, Cold Formed Sheet Piles are normally more readily available in lead time and are produced closer to your project location. Furthermore, the ability to buy different types of width and thickness of coils, gives Cold Formed Sheet Piles the added ability to customize new sections and shape which could be optimized to save on weight.

Are Cold Formed Sheet Piles Equivalent to Hot Rolled?

Essentially, yes they are equivalent in sections. All sheet piles are designed based on their sectional properties such as section modulus, moment of inertia and steel grade. Hence, for the same bending moment capacity of each pile, whether Hot Rolled or Cold Formed, they should perform with the exact same characteristics.

This article comes from Mer Lion Metals editor released

The Application Situation and Prospects of China Sheet Pile

Due to historical reasons, China’s annual consumption of steel sheet pile less than 100,000 tons, accounting for only one three-hundredth of the world. By South Korea and the Soviet Union in the past, the market is mainly in the majority with u-shaped steel sheet pile, but Z-type is seldom used. And generally designed by foreigners direct application in the permanent building foundation.

With the development of China’s industrialization process, steel sheet pile in the domestic applications are more and more frequently, and the demand is growing. But at the same time the start-up of steel sheet pile industry has many deficiencies and worth exploring at groping stage.

Currently, the domestic demand mainly rely on imports. Now, there are some domestic cold-formed steel sheet pile manufacturer. Cold-formed steel sheet pile is mainly used in the latent Pit. It is strong alternative to the hot-rolled steel sheet pile because of the cheaper costs. However, due to the impact bent the thickness and locking technology and other factors, led to an increase in weight, the accuracy is not controlled formation of irreparable flaws. So it is lack of the necessary conditions for a wide range of promotional applications.

Gap is the potential. China’s economy is currently in a period in the history of the development. According to research, The next 10-20 years, the transformation of our country’s infrastructure and Riverside waters seaward regions sheet piles will provide a broad application space.

Steel Sheet Piling

Steel sheet piles are long structural sections with a vertical interlocking system that creates a continuous wall. The walls are most often used to retain either soil or water. The ability of a sheet pile section to perform is dependent upon its geometry and the soils it is driven into. The pile transfers pressure from the high side of the wall to the soil in front of the wall.

There are permanent and temporary applications. Permanent sheet piles remain in the ground and serve as permanent retaining structures. Temporary sheet piles are designed to provide safe access for construction, and are then removed.

Hot rolled and cold formed are two primary methods of manufacturing sheet pile. While there are key differences between these two methods, the most important distinction is the interlock. Since hot rolled sheet piles are produced from steel at high temperatures, the interlock tends to be tighter than its cold formed counterpart. Normally, looser interlocks are not recommended in extremely hard driving conditions or for walls requiring low permeability. Hot rolled sheet piles are generally larger and have a broader range of strengths than cold form sheet piles, but there is a large overlap between the two, especially in the most common sizes.

This article comes from skylinesteel editor released

Long Branch Receives Funding To Build Sheet Pile Wall To Protect Shore

LONG BRANCH: The city will be receiving funding in the near future to take further action to protect its coast from future storms.

Long Branch will be receiving over $7.3 million in federal funding to build a sheet pile wall that will run along the east side of the city’s new boardwalk.

20150317The city is expected to go out to bid for the new boardwalk sometime this month after bonding over $18 million for its design and construction.

The Long Branch boardwalk, as well as the bluffs, bulkheads, and adjacent roads, were severely damaged as a result of Superstorm Sandy.

The funding for the sheet pile wall is being provided by the Federal Emergency Management Agency (FEMA), according to a release from Congressman Frank Pallone (D-6).

“This grant will help to ensure that our community is resilient if another major storm hits our shores,” Pallone said in the release. “As we continue to rebuild, we have a unique opportunity here in Long Branch, and throughout the state, to improve our infrastructure so it is stronger than before and can withstand future storms.”

The wall will be 5,450 lineal feet steel and will be installed for feet deep into the ground. It will help control erosion and reduce or eliminate the threat of damage to the boardwalk, bluffs, bulkheads, and roadways in the event of future storms.

The installation of the sheet pile wall will allow the destroyed boardwalk to be elevated above the base flood elevation (BFE). The new boardwalk will also be almost 10 wider than the original.

Construction of the new boardwalk is expected to begin in the spring and last through the summer months.
This article comes from wordontheshore editor released

Railway Engineering: cofferdam excavation

Pit cofferdam cofferdam is usually divided into soil, soil and steel sheet pile cofferdam cofferdam.

1. General requirements for pit cofferdam: Top cofferdam should be higher than the highest water level may occur during construction 0.5m; erosion protection measures for the river section should be compressed cofferdam caused; cofferdam should do waterproof tight reduce leakage; cofferdam should meet the needs within the area of infrastructure construction; cofferdam should meet the requirements of strength and stability.

2. The depth of soil cofferdam apply within 2m, the flow rate of less than 0.3m / s, the role of small and riverbed scour for smaller water permeability soil. Construction should be based on the actual situation of the construction site, the use of the pier, station location partial temporary cofferdam or first excavated canals, and then build the bridge located at the weir weir. Construction, should first clean up the river debris from the upstream to the downstream embankment close.

3. Soil cofferdam apply depth of not more than 3m, the flow rate of less than 1.5m / s, a small river of water permeability of the soil. Soil bags commonly used straw bags, sacks or bags, the soils and the amount is generally bag capacity 1/2 ~ 1/3, stacking requirements seam down around each other wrong, and stacking neatly as possible.

4. Steel sheet pile cofferdam apply Deep Water riverbed is sandy soil, clay, gravel and other soil and weathered rock formations. Sheet pile plane generally used for circular, rectangular and round end shape. Steel sheet pile cofferdam construction program: the steel sheet pile finishing a prison setting surrounded by a steel sheet pile around the prison to install a plug Hop dragon fight. Punched steel sheet pile method can be divided into block by block (group) punched, hit after the first mating dragon and part-by-block interpolation start playing after the first mating portion Long after the fight.

5. Excavation and back cover: After the success of the cofferdam can be conducted within the cofferdam excavation soil, water points and dry excavation excavation, excavation excavation methods have GRABBING Excavation, human open digging, excavation punch suction method.

 

L / S sheet pile

L-shaped main application and embankment, dam walls, dig trenches and ditching support.
Section light, small footprint pile wall, locking in the same direction, to facilitate construction. Suitable for excavation and construction of municipal projects.
L sheet pile icon
L-shaped steel sheet pile common specification sheet

Model
Width
Height
Thickness
Each pile Single
Per meter wall
Moment of inertia
Section modulus
mm
mm
mm
Kg/m
Kg/ m2
Cm4/m
Cm3/m
WRL1.5
700
100
3.0
21.4
30.6
724
145
WRL2
700
150
3.0
22.9
32.7
1674
223
WRl3
700
150
4.5
35.0
50.0
2469
329
WRL4
700
180
5.0
40.4
57.7
3979
442
WRL5
700
180
6.5
52.7
75.3
5094
566
WRL6
700
180
7.0
57.1
81.6
5458
606

s-shaped steel sheet pile common specification sheet

Model
Width
Height
Thickness
Each pile Single
Per meter wall
Moment of inertia
Section modulus
mm
mm
mm
Kg/m
Kg/ m2
Cm4/m
Cm3/m
WRS4
600
260
3.5
31.2
41.7
5528
425
WRS5
600
260
4.0
36.6
48.8
6703
516
WRS6
700
260
5.0
45.3
57.7
7899
608
WRS8
700
320
5.5
53.0
70.7
12987
812
WRS9
700
320
6.5
62.6
83.4
15225
952

Series Cold-bent Steel Sheet Pile

Cold-bent steel sheet pile is manufactured of hot (cold) rolled strip steel which passes though several pairs of forming blocks composed of forming roller sheet of different shapes and is formed through continuous roll-type bending process so as to achieve various sectional forms for various required steel sheet piles.

GP series cold-bent steel sheet pile products have the following characteristics:

(1)Thanks to the fact that cold-bent steel sheet pile is made of hot-rolled strip steel through continuous compaction, the design of sectional structure is provided with high flexibility for production of products with large section, small and equal wall thickness;

(2)GP series cold-bent steel sheet pile is suitable for large sized products with effective width, height and thickness not more than 16mm, having conformed(adapted) to the development trend of the world’s cold-bent steel sheet pile products and satisfied the requirements of engineering application of cold-bent steel sheet pile;

(3)The maximum section modulus of U-mode products of GP series cold-bent steel sheet pile is up to 4260 cm3/m2, and that of Z-mode series is up to 5100 cm3/m2; Thanks to the rational section structure design and the state-of-art forming technology of GP series;

(4)cold-bent steel sheet pile, the ratio of section modulus to product weight (also known as “mass coefficient”) has been increasing continuously. This contributes to better economic benefit of application and broadens the application area of cold-bent steel sheet pile;

The use of large-sized cold-bent steel sheet pile facilitates the reduction of working load of pile sinking(driving) , the improvement of work efficiency and the reduction in quantity of water seal joints.

 

Discussion on the sheet piles

Hot-rolled steel sheet pile was initially used in Europe at the beginning of the 20th century and is now a proven technology in foreign countries. But in China, this technology is still at its early stage. With the apid growth of Chinese economy, this environmentally friendly new building material will inevitably be widely used.

Depending on their production process, steel sheet pile products are divided into cold-bent and hot-rolled piles which bring out the best in each other and have their own advantages. In the past years, the market has given priority to hot-rolled steel sheet pile of which the processing method and information can be found everywhere that has been widely recognized. Cold-bent steel sheet pile is formed by cold-bending machine set through rolling depression, and its side interlock could be continually connected to form a steel structure of sheet-pile wall. Though, produced by a different working method, the use of cold-bent steel sheet pile is similar to that of hot rolled steel sheet pile while their scopes of application are different to some extent. Throughout the years, cold bent steel sheet piles have been widely used, and broad operation experience has been accumulated.

Nanjing Grand Steel Sheet Pile Co., Ltd is a key enterprise of China being engaged the research & development, design, production and service of cold-rolled forming section. Grand developed and produced China’s first piece of cold-bent steel sheet pile with a section modulus of 1360cm3 in October 2006 and was then expanded to have established an annual production capacity of 400,000 tons of cold-bent steel sheet piles.

Grand has been engaged in the research & development of cold-bent steel sheet piles according to EN standards (EN 10249: non-alloy cold-bent steel sheet pile) and now rank among leading cold-bent steel sheet pile manufacturers of the world at present. Furthermore, Grand has built up its own brand in the field of steel sheet pile, and its GP series cold-bent steel sheet piles have been used in a number of key projects at home and abroad. GP series products that feature outstanding section modulus and large moment of inertia can be widely used for both general retaining wall and basic structures and for ports, piers, river bank reinforcement and land and water foundation pit protection structures projects etc.

During its development in the past years, Grand has given full play to its own cold-rolled forming section development technology and improved the structures of lots of combined steel sheet piles, contributing to more rational project design and construction and more remarkable economic benefit; in the meantime, in order to better satisfy the requirements of individual customers, most cold-bent steel sheet piles of Grand are integrated with personalized design according to foundation conditions.

Grand can now produce GPU and GPZ series cold-bent steel sheet piles of over 80 specifications with the maximum section modulus of up to 6000 cm3/m and a maximum thickness of 16mm. When the section modulus of our product is the same with that of hot-rolled steel sheet pile, the steel consumption per square meter would decrease by 10%~15%, and this means sharp reduction of construction cost; in this way, the concept of “environmentally friendly, energy-saving and high-efficiency new-style building material” is realized.

Nanjing Grand Steel Sheet Pile Co., Ltd has established an overall service system for complete and sophisticated design, production, technical support and construction. With the support from top-class research institutes and universities (colleges) in the field of engineering of China, our technology sections can provide all services that a leading cold-bent steel sheet pile manufacturer should be able to offer, and can provide technical support for any step during steel sheet pile engineering, offering targeted and effective technical service taking into account various needs of customers.