基桩成孔质量完整性检测原理研究与推广：问题与解决方案

Abstract:

'The quality integrity of pile foundation borehole is an important guarantee for the safety and durability of the foundation. However, due to the complexity of geological conditions and construction factors, there are many problems in the detection of pile foundation borehole quality, which seriously affects the quality and safety of the foundation. This paper studies the principle of quality integrity detection of pile foundation borehole and promotes it in practice. Through the analysis of the detection process and the problems encountered, corresponding solutions are proposed to provide reference for the detection of pile foundation borehole quality integrity.'

Keywords: 'pile foundation; borehole; quality integrity detection; problems and solutions'

Introduction

Pile foundation is the most commonly used foundation form in civil engineering construction. The quality and integrity of pile foundation borehole directly affect the bearing capacity and deformation of the foundation, thus affecting the safety and durability of the foundation. Therefore, the detection of pile foundation borehole quality integrity is an important guarantee for the quality and safety of the foundation.

However, due to the complexity of geological conditions and construction factors, there are many problems in the detection of pile foundation borehole quality integrity, such as the difficulty of detection, the inaccuracy of detection results, and the difficulty of data analysis and interpretation. Therefore, it is necessary to study the principle of pile foundation borehole quality integrity detection and promote it in practice, and explore the problems encountered in the detection process and corresponding solutions.

Principle of pile foundation borehole quality integrity detection

The principle of pile foundation borehole quality integrity detection is to detect the physical and mechanical properties of the soil and rock strata around the borehole, and judge the quality integrity of the borehole according to the changes of these properties. The detection method includes visual inspection, drilling resistance test, sonic wave test, ultrasonic wave test, and other methods.

The visual inspection method is to observe the condition of the borehole wall and the soil and rock strata around the borehole, and judge the quality integrity of the borehole according to the degree of disturbance and the presence of cracks and voids.

The drilling resistance test method is to use a drilling rig to drill the borehole, and measure the drilling resistance and drilling parameters such as drilling speed and torque. According to the changes of these parameters, the quality integrity of the borehole can be judged.

The sonic wave test method is to use a sonic wave instrument to measure the speed and attenuation of the sonic wave propagated in the soil and rock strata around the borehole, and judge the quality integrity of the borehole according to the changes of these parameters.

The ultrasonic wave test method is to use an ultrasonic wave instrument to measure the speed and attenuation of the ultrasonic wave propagated in the soil and rock strata around the borehole, and judge the quality integrity of the borehole according to the changes of these parameters.

Problems encountered in the detection process and solutions

2.1 Difficulty in detection

The difficulty of detection mainly comes from the complexity of geological conditions and the influence of construction factors. The geological conditions of different regions and different depths are different, and the soil and rock strata around the borehole are also different, which makes the detection difficult. In addition, the construction factors such as the drilling method, drill bit type, drilling speed, and drilling fluid used in the construction process will also affect the detection results.

Solution: In order to improve the detection accuracy and reliability, it is necessary to select appropriate detection methods and instruments according to the geological conditions and construction factors, and strictly control the construction process to ensure the quality of the borehole.

2.2 Inaccuracy of detection results

The inaccuracy of detection results is mainly caused by the interference of various factors such as noise, temperature, humidity, and instrument performance during the detection process, which affects the accuracy and reliability of the data.

Solution: In order to improve the accuracy and reliability of the detection results, it is necessary to strictly control the environmental conditions during the detection process, and select high-precision instruments with stable performance and good anti-interference ability.

2.3 Difficulty of data analysis and interpretation

The data obtained from the detection process is complex and diverse, and it is difficult to analyze and interpret the data accurately and effectively, which affects the judgment of the quality integrity of the borehole.

Solution: In order to improve the accuracy and reliability of data analysis and interpretation, it is necessary to establish a scientific and reasonable data processing and analysis system, and select appropriate data analysis methods and software to process and analyze the data.

Conclusion

The quality integrity of pile foundation borehole is an important guarantee for the safety and durability of the foundation. The principle of pile foundation borehole quality integrity detection includes visual inspection, drilling resistance test, sonic wave test, ultrasonic wave test, and other methods. However, due to the complexity of geological conditions and construction factors, there are many problems in the detection process, such as the difficulty of detection, the inaccuracy of detection results, and the difficulty of data analysis and interpretation. In order to improve the accuracy and reliability of pile foundation borehole quality integrity detection, it is necessary to select appropriate detection methods and instruments, strictly control the construction process, and establish a scientific and reasonable data processing and analysis system.