What is static anchor pile pressing?
Static anchor pile pressing is a foundation treatment technology widely used in construction projects. It is mainly used to strengthen weak foundations or improve the bearing capacity of foundations. It presses prefabricated piles or steel pipe piles into the ground through a static pile driver, and combines with anchor technology to form a stable support system. In recent years, with the acceleration of urbanization and the advancement of construction technology, static anchor pile pressing technology has been widely used in high-rise buildings, bridges, underground engineering and other fields.
The following are the hot topics and hot content on static anchor pile driving in the past 10 days across the Internet:
| hot topics | Hot content | Related data |
|---|---|---|
| Technical advantages of static anchor pile pressing | Compared with traditional piling technology, static pile driving has less noise and vibration, and is suitable for construction in dense urban areas. | Noise is reduced by more than 60% and vibration is reduced by 80% |
| Construction process of static anchor pile pressing | It mainly includes steps such as measurement and positioning, positioning of pile driver, pile pressing, pile connection, and anchor installation. | Average construction speed: 20-30 meters/day |
| Material selection for static anchor pile pressing | Precast concrete piles, steel pipe piles, etc. are commonly used, and the proportion of steel pipe piles is increasing year by year. | Usage rate of steel pipe piles: reaching 45% in 2023 |
| Quality Control of Static Anchor Piling | Focus on controlling key parameters such as pile pressing force, verticality, and pile top elevation. | Verticality deviation requirement: ≤1% |
| Typical cases of static anchor pile pressing | This technology was used in a certain city's subway station project, and the foundation bearing capacity was increased by three times. | Bearing capacity: increased from 100kPa to 300kPa |
Working principle of static anchor pile pressing
Static anchor pile pressing technology combines the dual advantages of static pile pressing and anchor rod reinforcement. Its working principle is to generate static pressure through the hydraulic system to press the pile body into the soil layer, while using anchor rods to provide additional pull-out resistance to form a more stable foundation reinforcement system. This technology is particularly suitable for soft soil foundations and environments that require strict control of construction noise.
The following is a comparison table of the main technical parameters of static anchor piles:
| Parameter type | Ordinary static pile pressing | Static anchor pile pressing |
|---|---|---|
| Maximum pile pressing force | Usually ≤4000kN | Up to 6000kN |
| Pull-out bearing capacity | lower | Improve 30-50% |
| Applicable pile length | ≤30m | Up to 50m |
| construction noise | ≤75dB | ≤65dB |
Construction points of static anchor pile pressing
1.Preparatory work:Including site leveling, surveying and setting out, pile driver placement, etc. Pay special attention to the exploration of underground pipelines to avoid damage during construction.
2.Pile pressing process control:When pressing the pile, the pile body should be kept vertical, and the pile pressing force should be applied evenly to avoid sudden addition and unloading. When the pile pressing force reaches the design value, the pressure should be stabilized for 3-5 minutes.
3.Anchor construction:The anchor drilling should maintain the designed angle, and the grouting pressure should be controlled at 0.5-1.0MPa to ensure that the grout fully fills the hole wall gap.
4.Quality inspection:After construction is completed, bearing capacity testing and integrity testing need to be carried out. Commonly used methods include static load testing, low strain testing, etc.
Development Trend of Static Anchor Piling
As the construction industry develops in the direction of greening and intelligence, static anchor pile pressing technology also shows the following trends:
1.Intelligent construction:BIM technology and intelligent monitoring systems are introduced to realize visualization and precise control of the construction process.
2.Environmentally friendly material applications:Develop recyclable pile materials to reduce the impact of construction on the environment.
3.Standardized design:Establish a more complete standardized design system to improve construction efficiency and quality stability.
4.Multifunctional integration:Combine piling with other foundation treatment technologies to form a composite foundation reinforcement solution.
In short, static anchor pile pressing, as an efficient and environmentally friendly foundation treatment technology, is playing an increasingly important role in the construction field. With the continuous innovation and improvement of technology, it will surely show greater value in future engineering construction.
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