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A Brief Discussion on the Application of Pipe Piles in Highway Bridges

Pipe piles play an important role in the construction of highway bridges, making them more reliable and durable. On this basis, this paper briefly introduces the role of pipe piles in highway bridges and analyzes the issues requiring attention during pipe pile construction as well as the corresponding solutions, for reference.

2015-08-24
Analysis of Construction Technology and Quality Control Measures for Static Pressure Pipe Piles Based on Analytical Solutions of the Soil Squeezing Displacement Field of Pile Groups

Combined with the engineering example of the 300-ton-per-day low-temperature meat products project of Shanghai Shuanghui Dachang Co., Ltd., this paper summarizes and deepens research on techniques for construction difficulties, including the equivalent pile method, cylindrical cavity expansion method, and strain path method, and ultimately determines the analytical solution method for the soil squeezing displacement field of pile groups. It focuses on analyzing the pipe pile construction technology from the perspectives of pipe pile pre-inspection, positioning and setting-out, pipe pile lifting, transportation and stacking, pile frame lifting of piles, pile frame operating procedures, pile body verticality control, pile sinking, pile top elevation control, and electric arc welding of pile joints; at the same time, it discusses the pile pressing construction technology and its quality control measures from the aspects of pile pressing sequence, verticality control, pile position deviation control, and pile tip elevation quality control.

2015-08-24
Quality Control of Construction Technology for Static Pressing of Prestressed High-Strength Concrete Pipe Piles

This paper describes the quality control methods applied in construction for static pressing of prestressed high-strength concrete pipe piles, analyzes the causes of common quality problems, and presents preventive measures. Taking an actual project as an example, it explains the treatment scheme after pile head bursting, so as to ensure the smooth progress of pile foundation construction.

2015-08-24
Brief Discussion on the Construction of Prestressed High-Strength Concrete Pipe Pile (PHC Pile) Foundations

Prestressed concrete pipe pile foundations are concealed works that extend deep into underground soil (rock) layers. Their main function is to transfer the loads of the superstructure to deeper, harder soil (rock) layers, thereby ensuring the stability of buildings (structures). In recent years, with the rapid development of national economic construction, an increasing number of engineering projects have adopted prestressed concrete pipe pile foundations to meet the requirements of buildings (structures) for the bearing capacity and deformation of pile foundations, as well as seismic performance, and to ensure the safety and normal use of buildings (structures). The quality and safety of prestressed concrete pipe piles directly determine the safety and usability of construction projects.

2015-08-24
Effect and Application of Mineral Powder on the Strength of PHC Pipe Piles

Traditional high-strength concrete pipe piles use cement alone as the binding material. However, with the rise of mineral admixtures, the pipe pile industry has also begun to use ground silica sand, slag powder, fly ash, and other materials as binding materials in pipe piles. This paper mainly verifies through experiments the effect of mineral powder admixture on the strength of high-strength concrete pipe piles, and determines the optimal dosage range, thereby reducing production costs, conserving resources, and improving economic benefits.

2015-08-24
Theoretical Analysis and Finite Element Simulation of the Soil Squeezing Effect of PHC Pipe Piles

In this paper, different soil parameters are first substituted into the analytical solution derived from the cavity expansion theory to analyze the stress in the soil around the pile after cavity expansion. Second, the Abaqus finite element software is used with the Mohr-Coulomb model for the soil to analyze the stress and displacement of the soil around the pile after pile driving. Finally, the results calculated by the cavity expansion theory are compared with those from the finite element simulation to analyze the soil squeezing effect of PHC pipe piles.

2015-08-24
Exploration of Construction Management Methods for Bored Piles in Road and Bridge Projects in China

With the rapid development of China's transportation industry, an increasing number of road projects are being constructed. In road projects, bridge construction is an extremely important component and the lifeline of the entire road construction effort; therefore, strenuous efforts should be devoted to bridge construction. Construction management of bored piles in road and bridge projects is a key link in the construction process. To carry out bridge construction work effectively, it is essential to properly manage the construction of bridge bored piles. This paper provides an in-depth analysis and discussion of construction management for bored piles in road and bridge projects.

2015-08-24
Analysis of the Quality Impact and Performance of Additives in Pile Pipe Concrete

During the production of pile pipes, adding performance-enhancing additives to the pile pipe concrete can improve the quality of the pile pipes. It is necessary to study and analyze the mix proportions of each material in order to obtain pile pipes with the best performance. This paper analyzes the effects of raw material quality and production process parameters on concrete performance, and explains the key control points for pile pipe production. The results show outstanding effectiveness in practical engineering applications, not only reducing cement consumption but also improving pile pipe quality.

2015-08-24
Key Supervision Control Points and Target Values for Construction Quality of Hammer-Driven Pipe Piles

This paper discusses the key inspection points and target values for supervision during pipe pile construction, and proposes precautions based on the characteristics of pipe pile construction. Penetration is calculated according to the selected pipe pile type and piling machinery and equipment.

2015-08-24
Analysis of the Application of Pilot Hole Construction Technology for Engineering Pipe Piles

Based on the characteristics of pipe pile construction, this paper briefly introduces the pilot hole construction method for pipe piles and provides a preliminary analysis of some common problems encountered during pipe pile construction.

2015-08-24
Brief Analysis of Prevention and Treatment Methods for Pile Breakage Caused by Blockage During Concrete Pouring of Bored Cast-in-Place Piles

Bored cast-in-place piles are widely used in pile foundation construction due to their strong adaptability, high bearing capacity, and simple construction, and have achieved good results. However, problems such as pile breakage may also occur during construction. Based on the Changfeng Avenue (Second Ring Road–Third Ring Road) project in Wuhan, this paper introduces treatment methods for pile breakage in bored cast-in-place piles, and finally proposes preventive measures targeting the causes of pile breakage, so as to ensure the quality of bored cast-in-place piles and meet engineering design requirements.

2015-08-24
Solving Insufficient Working Space for Jacked Pipe Piles by Installing Pipe Piles and Grouting after Hole Formation

For jacked pipe piles, the center of the pipe pile is aligned with the cross-shaped center, and cement grout is injected into both the inner and outer sides of the pipe pile. One pile is randomly selected for a static load test, and the standard value of the ultimate vertical bearing capacity of a single pile meets the design requirements.

2015-08-24

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