Tensile force back-pull connection device between building foundation pile and upward-pull cross beam

Abstract

The invention discloses a tensile force back-pull connection device between a building foundation pile and an upward-pull cross beam, and relates to a tensile force conversion component or a tensile force connection component for connecting steel strips at the top ends of surrounding pipe piles with an upward-pull cross beam of a pressure test device. The device comprises a load bearing porous plate, a tensioning and locking device and a pull rod combination device, wherein the building foundation pile is connected with the load bearing porous plate through the tensioning and locking device, the upward-pull cross beam is connected with the load bearing porous plate through the pull rod combination device, and therefore the building foundation pile, the load bearing porous plate and the upward-pull cross beam are connected into a structure capable of bearing a high load. An upper pulling force bearing device is arranged above the load bearing porous plate, and load bearing reinforcing ribs are arranged below the load bearing porous plate. The tensioning and locking device is of an inner short pipe and outer short pipe sleeved structure. The device has the advantages that the steel strips of the building foundation pile for back pull and the upward-pull cross beam are fixed in a clamped mode to form a stress structure, and in the connection structure formed by fixing, the phenomenon that one or more steel strips of the building foundation pile are unstressed is avoided, and accidents are avoided.

Description

technical field [0001] The invention belongs to the technical field of pressure detection of building pile foundations. It is a tension conversion part of a pressure test device for measuring prestressed pipe piles with the component force of surrounding pipe piles, or called a tension connection part, especially the top of the surrounding pipe piles. The steel bar of the pressure test device is connected to the beam that is pulled up by the pressure test device, or the tension conversion part, or the tension connection part. Background technique [0002] When using the pressure test device for measuring the prestressed pipe piles of the surrounding pipe piles that I have applied for to test the pressure of the building foundation piles, the connection between the building foundation piles used for back-drawing and the upward pulling beams is welded Method, the shortcoming of welding method is: more than ten steel bars on the building foundation pile that each reverse pulls ...

AI Technical Summary

Problems solved by technology

[0002] When using the pressure test device for measuring the prestressed pipe piles of the surrounding pipe piles that I have applied for to test the pressure of the building foundation piles, the connection between the building foundation piles used for back-drawing and the upward pulling beams is welded Method, the shortcoming of welding method is: more than ten steel bars on the building foundation pile that each reverse pulls out all will be welded with the connecting big steel pipe on the upward pulling beam at different positions, a large amount of welding can't guarantee all to reach welding requirement, Generally, if some welds are not firm, the force will be added to other steel bars, which may damage the large steel pipes used for connection. The reverse pulling force of tens to hundreds of tons may cause serious accidents.

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