Application And Quality Control Of Long Screw Auger Taking Clay And Static Pressuring Pile Construction Technology

With the rapid development of the global economy, the scope of construction is continuously widen, the idea of people-oriented and environmental protection and the implement of relevant law regulations are continuously strengthen, pile construction technology is continually updating and improving, its strong vitality and expansive development prospect are showed.The shallow uneven thickness hard sandwich emerge in Kunming Taipei area, there are the commonly used method of pile sinking:the static pressure method with drilling pile; bored piles; vibrating sunken tube piles etc. Long spiral drill with the static pile soil pressure is a common for piles method in Kunming Taipei area, this construction process has many advantages compared with other construction techniques:the noise does not affect the surrounding residents; less impact about surrounding buildings from vibration; in particular, the local base shallow in hard laminated, it can improve the ability to penetrate the subgrade and pile driving efficiency. In order to promote application this technology within a certain range, this construction technology research is very necessary and practical significance.This paper mainly describes engineering application and quality control of construction technology about the static pressure method with drilling pile. Some quality problems are encountered in the construction process, priority analyses the factors which resulted in the quality accident and propose effective measures. After construction is completed, Low strain dynamic testing the integrity of the pile, static load testing bearing capacity of the pile, for those piles does not satisfied with the detection result, combining engineering practice, to study a variety of processing manner.Through application of the static pressure method with drilling pile in the actual project, we can see that this construction process to avoid the problem of a single construction technology in the construction, a number of successful applications of this process shows that this process feasible. However, due to the construction process requires long auger coordinate static pile driver to the smooth implementation. So this paper compile "construction method of long spiral to earth with the static pile ", there are important guiding significance for using this construction technology projects, also played a role in the promotion of the construction process.