TH7369B - Process for producing precast concrete piles - Google Patents

Abstract

This invention is a procurement process for the production of quality precast hollow concrete piles. which can use stationary templates and without any cumbersome equipment at a low cost In the process according to this invention An expanding and contracting flexible tube is inserted into a template and fluid is injected under high pressure to expand the tube radially. The concrete was then injected into the space between the expanded pipe templates. Pipes, which tend to rise due to the difference in specific gravity between the injected concrete and the expanded tubes with internal pressure fluids, are suppressed by means of suppression devices so that It will have a center with the template. and after the injection has been completed The suppressor is removed from the template and the pressure inside the tube is released to allow the tube to contract radially. The pipes are then removed from the hollow sections that have been prepared in the cast concrete piles.

Claims (6)

1.Process of manufacturing finished hollow screw piles It consists of steps of: Inserting a flexible tube that can expand and contract. Into a template for casting concrete piles; A fluid with a lower specific gravity than concrete is injected into the flexible pipe at high pressure. So that such flexible pipes expand in a radial direction; Injecting concrete into the space between the template and the expanded flexible pipe. The expanded flexible pipe floats up to the suppression device installed above the flexible pipe by means of buoyancy due to the difference in specific gravity between the injected concrete and the fluid compressed into the flexible pipe. As a result, the flexible pipe collides with the suppressor at the axis of the template; Removing the suppression device from the said template After the concrete injection is finished; Internal pressure relief of such flexible ducts After the injected concrete has solidified. So that the flexible hose shrinks in a radial direction; and Removing such flexible ducts from the hollow sections formed inside the molded concrete piles. 2. Procedure according to claim 1 in which one end of the flexible hose is inserted through one end of the template. 3. Procedure according to claim 1, in which both ends of the aforementioned flexible hose are respectively inserted through both ends of the template. 4.A set of equipment for the production of precast concrete piles. Which includes: template for casting precast concrete piles; Flexible conduit that is inserted into a template to form a hollow section in the concrete piles. Such flexible pipes are made of flexible materials. It can expand in a radial direction by injecting a fluid with a lower specific gravity than concrete into it at high pressure. And can be retracted in a radial direction by releasing internal pressure; and The deterrent device is installed over the flexible pipe. This creates contact with the flexible pipe, which floats up in the injected concrete. Which is injected into the space between the template and the flexible ducts that are expanded by infusing the fluid. By the buoyancy force due to the difference in specific gravity between the injected concrete. With the fluid inside the flexible pipe, the restraint device is installed in such a way that The expanded flexible pipe is restrained by the suppressor to coexist with the template. 5. Equipment according to claim 4, which is a flexible hose made of synthetic resin. With one end of the pipe being sealed. And the other end contains the inlet of the said fluid 6. The device according to claim 4, each of which is composed of a deformed restraint attached to the outer surface of the flexible duct.