The Quality Testing And Evaluation Of Large Diameter Piles Based On A Synthetic Method

Pile foundation is a kind foundation which,along with the enlarging of construction, is getting more and more important.Silted piles,segregation, honeycomb,centralized air vent and fracture of bored piles often occurs due to geological and hydrological conditions and conducting method, which will have bad in fluence onpile bearing capacity and safety perform ances of superstructure.At the same time, the problem of pile foundation quality is also growing. In this paper, the testing of pile foundation in Gansu was studied on the baisis of a high-level commerce-residence building pile. At last, the new method of pile test and needing note were put up by field test and theoretical analysis methods, combined on the basis of investigation, collecting and organizing large amounts of data, especially the data of Gansu. The method used in the study has been proved that it was not only easy to use but also had good accuracy. Furtherly, the method can improve the pile foundation detection in Gansu area, and our study couldprovide an important reference for the construction of pile foundation in the area.This article will research further to the evaluation method of the pile foundation. First, I will Introduce the basic principle of ultrasonic and Suitable conditions,then aimingat the limitation of ultrasonic transmission method for detecting,that influence scope byblind and sound,Put forward the importance of Synthesis analysis.Use the amplitude, velocity, PSD value of the comprehensive judgment of pile according to the characteristics of different pile of various defects on the acoustic parameters, and put forward the judgment of pile defect properties skills. Inview of(JGJ 106-2003) "technical specifications" testing of building foundation piles in the provision of the pile integrity classification, summary the use of sound wave transmission method in detection of grouting pile and unreasonable to classification, and puts forward some personal views on the corresponding improvement. The case study finally through the engineering of highway in Gansu province, detect the perfusion pile using sonic transmission method improved detection technology, summarizes the improved Synthesis analysis method toimprove the accuracy of bored pile quality detection in all aspects of advantages finally.Through the research of this paper, Comprehensive evaluation method not only can improve the quality of the project but alsocan shorten the construction period,at the same time, reduce the construction cost, the ultimate guarantee of engineering project construction safety, the use of safety. The relevant results of this study have a certain reference value for the cast-in-situ pile integrity detection.