Pipe pile vertical static load testing connection device, and testing system and method using same

Abstract

The invention discloses a pipe pile vertical static load testing connection device, which mainly comprises vertical connecting rods and a clamp for clamping the pile head of a pipe pile, wherein the lower ends of the connecting rods are connected to the clamp; the upper ends of the connecting rods are used for connecting a counterforce loading device positioned above the pipe pile; in an anti-pulling test, the pipe pile is taken as a test pipe pile, and upward pulling force is transmitted to the test pipe pile through the friction acting force between the clamp and the test pipe pile; or in a compression test, the pipe pile comprises a test pipe pile and at least two pairs of anchor piles which are symmetrically positioned on the periphery of the test pipe pile, and counterforce is applied to the test pipe pile in a balanced way through the friction acting force between the clamp and the anchor piles. The invention further discloses a testing system and method using the connection device. The pipe pile vertical static load testing connection device, the testing system and the method are suitable for the anti-pulling test and the compression test, and have high universality; and the pipe pile vertical static load testing connection device is convenient to install, is low in cost and has high safety, and various problems existing in the conventional connection method are solved, and technical support is provided for the realization of wide application of an anchor pile method in compression tests.

Description

Technical field [0001] The invention belongs to the technical field of pile foundation detection, and in particular relates to a prestressed concrete pipe pile pile foundation vertical static load test connection device, also relates to a test system using the connection device, and also relates to a test method of the system. Background technique [0002] The prestressed concrete pipe pile is a round tubular reinforced concrete precast pile made by the pretensioning method and the centrifugal forming method. At present, various types of prestressed concrete pipe piles have been widely used in housing construction and deep water Wharf structure, road and bridge engineering, etc. In engineering construction, the bearing capacity of the pile has become a very important technical means to control the quality of the project, and the vertical static load test of the pile foundation is the most intuitive and reliable method to determine the bearing capacity of the pile foundation. The...

AI Technical Summary

Problems solved by technology

The disadvantages of this connection method are: (1) Concrete must be poured, and the curing time for watering and curing concrete is long, generally not less than 7 days; (2) Inserting reinforcement and core-filling treatment for pipe piles is laborious and laborious, and materials cannot be repeated Utilization, during the test, some steel bars may be pulled out, resulting in the failure of the test; (3) The welding quality of the steel bars is not easy to guarantee

[0008] The first is the counterforce device of the ballast platform, which adopts the stacking method. Before the test starts, the stacked objects need to be stacked on the load-bearing platform at one time. There are safety hazards in the stacking process, and the implementation cost is high, and the test preparation time is too long. In addition, the "heap loading method" has higher requirements on the test site, if the test site is narrow or the ground is soft, the "heap loading method" cannot be applied

[0009] The second is the pull-anchor device, which changes the structural system of the entire loading and reaction force device, and improves the structural system composed of mainly bending beams into a tension-compression rod system with simple stress. Although the use of the pull-anchor device optimizes the reaction force The structural system of the device, but the oblique tension is easy to damage the pile head of the pipe pile

However, due to the inability to determine the connection method between the loading reaction device and the pipe pile suitable for engineering applications, this device has not been used in the static load test of the pipe pile at present

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