In the pull-out test of existing prestressed concrete pipe piles, the connection method between the pile body and the jack usually involves pouring micro-expansion concrete into the pipe hole of the pipe pile, inserting multiple steel bars into the concrete, and after the concrete solidifies and cures to reach the design strength, connecting the steel bars and tie rods by welding. The disadvantages of this method are that concrete must be poured for welding, curing time is long, labor-intensive, and welding quality is difficult to guarantee. An improved prestressed pull-out test device including a pile barrel, an upper beam, a lower beam, a main beam, and a jack is provided. Let's learn about the manufacturing method of the pipe pile compression test device together!

　　The upper beam and the lower beam are fixedly connected by tie rods, the lower beam and the pile barrel are fixedly connected, the upper beam and the lower beam are located on both sides of the main beam, a jack is placed between the upper beam and the main beam, and the main beam is connected to the ground by support legs. The device provided in the aforementioned Patent Document 1 is a great technical improvement compared to existing methods, but its structure is complex, inconvenient to manufacture and use, and there is room for further improvement鉴定。

　　The purpose of this utility model is to provide a pipe pile pull-out test device with simple structure, easy manufacturing, installation and use, which can effectively reduce production costs and improve production efficiency. The technical solution of this utility model is a pull-out test device for pipe piles, including an upper pull beam, a lower pull beam, a main beam, and a jack, connected by at least two rods symmetrically arranged relative to the main beam. The upper pull beam and the lower pull beam are located on both sides of the main beam, a jack is provided between the upper pull beam and the main beam, and the main beam is connected to the ground by support legs. The above structure can achieve beneficial effects such as firm connection, shortened construction period, multiple reuses after the device is made once, and wide application range, similar to existing technologies, but it has the advantage of simple structure compared to the existing technologies disclosed in the literature。

　　As a further improved pipe pile anti-pull-out test device of this utility model, the upper rear beam and the lower rear beam are steel plates, and the lower rear beam steel plate is connected to the front end of the prestress. Steel plate materials are widely available, lower in cost than traditional flanges, and can meet the performance requirements of flanges. As a further improved pipe pile anti-detachment test device of this utility model, the upper tension beam steel plate is circular, the lower tension beam steel plate is annular, and the diameter of the upper tension beam steel plate and the outer diameter of the lower tension beam steel plate are 400 mm to 800 mm. The steel plates with the above specifications have a wide range of applications, effectively control the size of the steel plates, and are convenient for transportation, storage, installation, and use. As a further improved pipe pile anti-pull-out test device of this utility model, at least one circle of uniformly arranged threaded holes is set on the lower pull beam steel plate, and the lower pull beam steel plate and the prestress front end are fastened with bolts. Bolts are simple to install, easy to disassemble and reuse multiple times, and the connection is firm, which can meet the test requirements. As a further improved pipe pile pull-out test device of this utility model, the nominal diameter of the said bolts is 24 mm。

　　The bolts of the pipe pile compression test device can meet the stress strength requirements in the test, representing a combination of cost and performance. As a further improved pipe pile anti-pull-out test device of this utility model, the aforementioned threaded holes are provided multiple times to be suitable for prestress front ends of corresponding different specifications. Further expand the application range of the test device and reduce production costs. As a further improved pipe pile pull-out test device of this utility model, anchor holes are provided at positions corresponding to the aforementioned lifting beam steel plate and lifting beam steel plate, and the aforementioned tie rods are steel bars with upsetting treatment at both ends. The steel bars anchor and connect the lifting beam steel plate and the lifting beam steel plate respectively through the anchor holes. The tie rods of the above structure are simple to manufacture, quick to install, and can effectively overcome disadvantages such as eccentricity and uneven force caused by conventional welding connection methods. As a further improved pipe pile pull-out test device of this utility model, the diameter of the said steel bars is 9mm to 20mm。

　　The steel bars of the pipe pile compression test device can meet the stress strength requirements in the test, representing a combination of cost and performance. As a further improved pipe pile pull-out test device of this utility model, a rebar groove is connected to the anchor hole. The steel bars are convenient through the upper tension beam steel plate and the lower tension beam steel plate, making assembly more convenient and quicker, and easy to disassemble and store. The pipe pile pull-out test device provided by this utility model has a simple structure, is convenient to manufacture, install and use, can effectively reduce production costs, improve production efficiency, expand the application range of the test device, and overcomes disadvantages such as eccentricity and uneven force caused by conventional welding connection methods of upper pull beam and lower pull beam。

　　The above introduces the manufacturing method of the pipe pile compression test device. If you want to know more, please feel free to contact us!