Construction method of prestressed anchor rod static pressure pile

Abstract

The invention relates to a prestress anchor rod static piling construction method which is characterized in that when in anchor rod static piling construction, firstly, the conventional anchor rod static piling construction method is followed to carry out hole opening, anchor rod embedment and pile frame setting up on a basis of the availability of a building, and a pile is pressed under the foundation in sections and then a pile frame is removed and a force transmission frame is put into a pile hole. A bracket is installed and an anchor rod is utilized for fastening the bracket on which a thruster is arranged. The thruster presses against the force transmission frame by controlling a control valve on the thruster so as to ensure that a pile foundation generates a downward pressure while the foundation obtains an upward lifting force and finally reinforced concrete is used for sealing the pile. The construction method has simple equipment adopted and convenient operation, and can fully utilize the characteristics of small sedimentation and high bearing capacity of the anchor rod static piling and fulfill the performance of the pile foundation to the maximum extent, thereby saving the quantity of jacking piles and reducing project cost. Meanwhile, the sedimentation after the foundation is reinforced can be effectively reduced and even the foundation can be lifted partially. The construction method is not only applicable to foundation reinforcement, underpinning and rectification projects, but also is applicable to plies of other forms to obtain the prestress according to the method.

Description

[technical field] [0001] The invention relates to the technical field of pile foundation construction, in particular to a method for applying precompression stress to the pile foundation after the static pressure pile with anchor rods is pressed into the foundation. [Background technique] [0002] The technology of anchor static pressure piles to strengthen the foundation of existing houses or to underpin and rectify existing houses has been widely used. The main advantages are that the equipment is simple, the required operating space is small, and the impact on the existing buildings and the surrounding environment is small. Low cost and so on. National technical specifications or industry standards have specific regulations and requirements for its design and construction. At present, the construction method of anchor static pressure piles is as follows: first open holes on the foundation of existing buildings, bury anchor rods, pile frames, press prefabricated concrete ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for the construction of prestressed anchor static piles in order to overcome the shortcomings of the limited effect on the control of foundation settlement deformation and the lack of performance of the pile foundation during the construction of conventional anchor static piles. The equipment is simple and easy to operate. Because the compressive stress has been applied to the pile before the pile is sealed, it can significantly reduce the settlement after foundation reinforcement, save materials, and reduce engineering costs. It is suitable for foundation reinforcement, underpinning and deviation correction projects.

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