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Analysis and Treatment of Quality Accidents in Prestressed Concrete Pipe Pile Engineering

Owing to technical and economic factors, prestressed concrete pipe piles have become the most preferentially promoted pile type in housing construction and other projects. If effective measures are not taken during foundation pile construction and foundation pit earthwork excavation, the pipe piles may be subjected to excessive horizontal forces, resulting in quality accidents such as tilting, deviation, and pile body cracking, which seriously affect the engineering quality of the pipe piles. This paper describes several quality accidents encountered in actual projects, analyzes the causes of the accidents, and adopts corresponding treatment measures for different situations. The treated pipe piles meet the design and code requirements and achieve good results.

2015-08-26
Application of CO2 Gas Shielded Welding in PHC Pipe Pile Construction

Based on the construction case of PHC-400 (AB) prestressed high-strength concrete pipe piles (PHC pipe piles) in the foundation project of the Xishan Huayuan residential community in Nanjing, this paper discusses several issues concerning the application of CO2 gas shielded welding in pipe pile construction.

2015-08-26
Construction and Quality Control of Static Pressed Pipe Piles

As a new type of foundation, the static pressed prestressed pile foundation is widely used in multi-story and high-rise building projects due to its advantages of low noise, no vibration, minimal pollution, and fast construction. Soft soil, composed mainly of silt, mucky soil, and saturated soft clay deposited underwater, is widely distributed in southern China. Soft soil has low bearing capacity. To ensure construction quality when installing static pressed pipe piles in soft soil geology, correct construction methods and quality control must be adopted.

2015-08-26
Discussion on Wave Velocity in Low-Strain Reflected Wave Testing of Prestressed Concrete Pipe Piles

Wave velocity, as an important parameter in the integrity testing of prestressed concrete pipe piles, plays a significant role in determining pile length and pile body defects. However, affected by many factors such as materials and construction techniques, it is difficult to determine accurately.

2015-08-26
Analysis of the Causes and Prevention of Pile Bursting in Prestressed Pipe Piles

Based on the main characteristics of prestressed concrete pipe piles and combined with practical cases, this paper analyzes the causes of pile bursting during the construction of prestressed pipe piles and the preventive measures. It is proposed that as long as production strictly follows national standards, process requirements are conscientiously implemented and executed during production, and construction is carried out in strict accordance with specification requirements during the construction process, project quality and quantity will certainly be guaranteed.

2015-08-26
Discussion on Construction Technical Measures for Jacked Pipe Piles

Jacked pipe piles belong to a sub-division of foundation works. During construction, a static pile driver is used to slowly press the pipe piles into the soil. Serving as piles that transmit building loads, jacked piles generate no noise. The loads of the building foundation are transferred through the pile caps to the soil via these tubular piles, thus forming a structural system. Based on an actual project, this paper discusses the construction technical measures for jacked pipe piles, in the hope of facilitating exchange and discussion with fellow professionals.

2015-08-26
Research on Precast Concrete Pipe Pile Construction

This paper mainly studies the preparatory work before pipe pile construction and the quality acceptance upon arrival at the site; the causes of and treatment methods for problems encountered during construction, such as the inability to proceed due to shallow obstacles, inclined piles, and broken piles; and the methods for pile cutting after construction is completed, for filling the pile top with concrete, and other matters requiring attention.

2015-08-26
Analysis of Construction Quality and Management of Pile Foundations for High-Pile Wharves

Construction operations for high-pile wharves are a key component of the port and wharf engineering operation system. Ensuring the quality of pile foundation construction is closely and intimately linked to the prevention and treatment of quality defects in the foundation structure. In particular, regarding the foundation type selection for high-pile wharves, construction operations are frequently carried out on soft soil foundations; therefore, how to strengthen quality control over high-pile wharf foundation operations and prevent the formation of common quality defects has important practical significance and a guiding role in ensuring quality outcomes. On this basis, this paper takes high-pile wharf pile foundation construction technology as its research topic, examines and discusses the structural characteristics of high-pile wharves and the common defect problems in high-pile wharf construction operations, and proposes measures for implementing quality control and management in high-pile wharf construction operations.

2015-08-25
How to Reduce the Soil Squeezing Effect on Surrounding Ground During Static Pressure Pipe Pile Construction

Compared with conventional pile driving methods, static pressure pipe pile construction offers advantages such as no noise or vibration, no impact force, and low construction stress, and it allows the pile-sinking resistance to be measured during installation, thereby providing parameters for design and construction. However, static pressure piles are displacement piles, and the soil-squeezing effect they produce can adversely affect the project. Based on actual engineering conditions, this paper flexibly applies various preventive measures against soil-squeezing effects, effectively mitigating the adverse impacts of pile-sinking squeezing stress on the engineering piles themselves and the surrounding environment, providing a reference for similar pile foundation construction in China.

2015-08-25
Technical Selection and Engineering Application of Static Pressed High-Strength Prestressed Concrete Pipe Piles

Since the introduction of prestressed high-strength pipe pile technology in the Guangzhou region in 1986, it has been widely applied there. It uses high-strength steel bars and high-strength concrete formed by centrifugal molding,

2015-08-25
Application of Various Pile Types (Pipe Piles, Cast-in-Place Piles, Cement-Soil Mixing Piles, etc.) in the Xuzhou Region

With the rapid development of the social economy, the Xuzhou region has made considerable progress in both urban construction and infrastructure development, and various pile types have been fully applied in different types of buildings. This paper summarizes the application of various pile types in the Xuzhou region, providing a reference for the construction plans of similar projects in the future.

2015-08-25
Pile-Wall Support Technology for Utility Tunnels

Taking the deep foundation pit construction of the comprehensive utility tunnel on Xiaohuan West Road in Jinan as a case study, this paper addresses the construction of an 8 m deep foundation pit using a combined support technology of bored cast-in-place piles and jet grouting piles. It elaborates on the determination of the combined support scheme using cast-in-place piles and high-pressure jet grouting piles, key construction points, key monitoring points and results of foundation pit construction. This provides certain guiding significance for foundation pit support construction.

2015-08-25

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