Static pressure construction technology of prestressed pipe piles

Abstract

The invention relates to the technical field of construction, in particular to a static pressure construction technology of prestressed pipe piles. The static pressure construction technology of the prestressed pipe piles is characterized in that before the prestressed pipe piles are pressed, a pile driver is reasonably selected according to geological data of a project and the designed requirement for the bearing capacity of the single pile, piling pressure of the pile driver needs to be no lower than 1.2 times a vertical ultimate bearing capacity standard value of the single pile, the positions of the prestressed pipe piles are checked one by one according to a building and structural pile position graph, all present pile tips are measured, related dimensions, such as the external diameter, the wall thickness, a pile body, the length, the bending degree of the pile body, and especially the thickness of the pipe wall, of each prestressed pipe pile are measured, and due to the fact that clamping force in the process of construction through a static pressure method is large, the prestressed pipe piles can be easily broken due to clamping when the wall thickness is not large enough. The static pressure construction technology of the prestressed pipe piles has the advantages that in the process of construction, noise is low, vibration and pollution are not caused, construction can be continuously carried out for 24 hours, and the construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction technology of prestressed static pressure pipe piles. Background technique [0002] In recent years, prestressed pipe piles have been rapidly developed and popularized in eastern Guangdong due to their advantages such as short construction period, low unit bearing capacity and low cost. At the same time, due to the increasingly prominent disadvantages of hammering construction in terms of environmental protection, static pressure construction is becoming more and more common, and many technical issues about the quality and safety of static pressure pipe piles caused by this have also attracted people's attention. The static pressure method construction is a pile-forming process in which the prefabricated pile is pressed into the soil by the self-weight of the pile-pressing mechanism of the static pile-pressing machine and the counterweight on the pile...

AI Technical Summary

Problems solved by technology

Its disadvantage is that it has a soil squeezing effect, which has a certain impact on the surrounding building environment and underground pipelines. It requires a relatively large distance from the center of the side pile to the adjacent building; the ground endurance requirements of the construction site are relatively high. It is easy to sink the machine in the construction of the site soaked in stagnant water; excessive pile pressure (clamping force) will easily crush the pipe pile body, or cause longitudinal cracks in the pipe pile; it is not suitable for underground obstacles or boulders. More site construction, many problems limit the application of this technology