Section performance of steel sheet piles: At present, the steel sheet piles widely used in China are mainly U-shaped steel sheet piles, which are divided into Larsen IV, Larsen V, Larsen VI, etc.
Others: steel structure design specifications, load specifications, etc.
Steel sheet pile design is based on Technical Specification for Building Foundation Pit Support JGJ120-2012.
Introduction to Steel Sheet Piles Steel sheet piles began to be produced in Europe in the early 20th century and are rapidly applied to various permanent and temporary projects in the construction industry, including ports, wharves, river revetments, retaining walls Underground structure, etc., is a kind of reusable green environment-friendly structural steel, which has unique advantages such as high strength, light weight, good water stop, strong durability, high construction efficiency, less land occupation, etc.
1、 Introduction to Steel Sheet Piles Introduction to Steel Sheet Piles Application of Steel Sheet Piles at Home and Abroad Construction Characteristics of Steel Sheet Piles Types of Steel Sheet Piles Section Performance of Steel Sheet Piles Support Forms Steel Sheet Piles Support Structure Interpretation I.
At the same time, due to the lack of understanding and even some misunderstanding of this product in the domestic engineering community, many enterprises dare not easily try to apply this new technology and new product.
The internal support spacing, calculation length and other adjustment methods: angle brace, column, interlayer support, lattice support, etc.
This screen construction method can prevent the inclination and rotation of sheet piles, and is often used for enclosure structures requiring closure.
Overview of steel sheet pile construction, steel sheet pile construction, pile driving equipment 3.
4 Type of steel sheet pile: At present, steel sheet pile manufacturers are mainly concentrated in Japan, South Korea, Luxembourg and other countries.
The annual consumption of steel sheet pile is only 30000 tons, which is not commensurate with China’s steel consumption accounting for one third of the world.
Steel sheet pile design 1.
Calculation of steel sheet pile support structure – Layout and calculation of support taking multi braced steel sheet piles as an example: Calculation of sheet pile depth into soil: stability checking: overall stability checking, anti slip checking, anti overturning stability checking, anti uplift stability checking, seepage stability checking, anti surge checking, etc.
Overview of steel sheet pile construction, steel sheet pile construction 2.
Introduction to Steel Sheet Piles 1.
The main section parameters are shown in the following table: 6.
2.
Steel sheet pile support form cantilever type: reinforced pile steel sheet pile support form pile anchor type: steel sheet pile support form anchor type: steel sheet pile support form IPS method: steel sheet pile support form HSW method: steel sheet pile support form HPW method: steel sheet pile support form steel truss type: 8.
5.
2.
Anti corrosion design of steel sheet pile 3.
With its wide application in foreign engineering, the technical level of design, manufacture and installation of steel sheet piles is also improving.
The strength checking calculation of steel sheet pile is generally carried out according to the following formula: the selection of steel sheet pile length: model, water stop curtain, structure and stability checking calculation results.
Steel sheet piles have become an important product in foreign engineering.
This method can ensure good perpendicularity, reduce the difficulties encountered in pile sinking and loose piles, and better control the length of the pile wall..
Calculation of purlin, local stability, check calculation, detail node design (omitted) 5.
Pile driving method: pile driving one by one: screen type: 10~20 sheet piles are inserted into the soil to a certain depth, so that the pile driver can hammer back and forth, and 12 piles at both ends are driven to the required depth first, and then the sheet piles in the middle are driven successively.
7.
The types of steel sheet piles are mainly divided into U-shaped steel sheet piles, Z-shaped steel sheet piles, composite steel sheet piles and 900mm cap type steel sheet piles that have been widely used in Japan.
On the one hand, due to the great investment of the state in the project construction, especially in the South to North Water Transfer, railway and highway construction, water area reconstruction and other projects, the construction of urbanization development.
Calculation of internal support – Take the single layer internal support as an example.
By changing the section shape and length of steel sheet pile, it can adapt to the requirements of different geology, depth, and support structures, while making the entire maintenance structure more economical and reasonable.
Load action of steel sheet pile support structure Water and soil pressure (selection of survey points and support profiles) Water force, wave force Overload of building foundation, etc.
As the steel sheet pile industry in its infancy is still in the exploratory stage in terms of production process, technical standards and industry specifications, there are many deficiencies and areas worthy of exploration.
The internal support component strength, stability check calculation (in-plane and out of plane).
Steel sheet pile support forms: cantilever type, pile anchor type, anchor type, pile supported (pre stressing) IPS method (fish web beam), HSW method (composite steel sheet pile), HPW method (composite steel sheet pile), double row steel sheet piles (few) Steel truss type, etc.
4.
On the other hand, due to the strengthening of China’s awareness of environmental protection, land conservation and natural disaster resistance in the engineering field, there will inevitably be a huge demand for some environmentally friendly, economical and efficient engineering products.
Code for Design and Construction of Sheet Pile Wharf (JTS167-3-2009).
Therefore, we can believe that the application of steel sheet piles in China has broad prospects.
Foundation pit construction has small area, small pollution, and environmental protection characteristics.
3.
Application of steel sheet pile at home and abroad: 3.
Construction characteristics of steel sheet pile: simple construction, no need for huge construction equipment, fast construction, can greatly shorten the construction period, good interchangeability, and water sealing.
Interpretation of steel sheet pile support structure: II Steel sheet pile design Steel sheet pile design is based on the load action of steel sheet pile support structure Calculation of steel sheet pile support structure Internal support Calculation of steel sheet pile anti-corrosion design II.
by section.
However, the application of steel sheet pile technology in China is still in its infancy.
Design and Construction Manual of Deep Foundation Pit Engineering.
According to the analysis of market professionals, China will become a large country of steel sheet pile consumption in the next 10 years.
Selection of steel sheet pile model: after the maximum bending moment of the steel sheet pile structure is calculated from the structure, the section modulus of the steel sheet pile and the material of the steel sheet pile can be determined according to the strength requirements, and the steel sheet pile model can be finally selected.
