US-12626313-B2 - Strong mounting system for greased plastic-coated prestressing tendons, intelligent reusable modular structure, strong support and fastener for fastening a tendon in a strong support

Abstract

An assembly method is described for greased, plastic coated and prestressed concrete reinforcing tendons, comprising a work plan, an intelligent and reusable modular structure (modular box), a resistant support and a fixer for the tendons in resistant support, aiming to solve problems of storage, productivity, transport, construction process, generating improvement in technical qualification, thus obtaining a faster, more accurate and safer conference, associated with the color system inserted in a work plan. This method is used in the field of Civil Construction, especially in the execution of prestressed massive flat slabs.

Inventors

• ERNANI SIMAS ALVES NETO

Assignees

• EVEHX NORTH AMERICA, LLC

Dates

Publication Date

20260512

Application Date

20231130

Claims (1)

1. 1 . A method for resistant assembly of grease and prestressed plastic coated tendons, comprising: after executing a contract ( 1 . 1 ), a client (work) sends to a construction company a most up-to-date version of structural prestressing designs for massive slabs ( 1 . 2 ) and files the structural prestressing designs in a work folder ( 1 . 3 ) to start a work plan ( 2 ); executing the work plan ( 2 ) as soon as the work plan arrives in an engineering department, the execution of the work plan beginning by a calculating engineer confirming a project version ( 2 . 1 ); if a version of a project is not a most up-to-date version, the calculating engineer sending a new project version to the construction company, if the project version is a most up to date version, the work plan starts with execution of a cutting spreadsheet ( 2 . 2 ), where a person in charge extracts from project version information of a number of tendons per axis and a length of the tendons, in parallel with creation of a cutting sheet, a survey is carried out ( 2 . 3 ) of an amount of resistant supports for solid slabs that will be necessary for assembly of each floor of a building, after the support survey is carried out, the work plan is drawn up where a person in charge separates the project into modules ( 2 . 5 ), wherein each module contains an exact number of resistant supports for the execution of that part of the project, after carrying out the survey of the number of resistant supports, a number of active or passive accessories necessary for execution of a floor is calculated ( 2 . 4 ), once the survey of accessories and supports is completed, the engineering department generates a material separation order for a factory ( 2 . 6 ), containing all information for those responsible to separate materials for each floor that will be sent to a work site; creating a summary for production ( 3 ): through the project, information is extracted from the cutting spreadsheet comprising a quantity and length of tendons, survey of resistant supports per module and the material separation order comprising at least anchoring and wedges ( 3 . 1 ), the information is passed on to respective parts of a factory for the production of all material ( 3 . 2 ); producing resistant supports according to a summary ( 4 ): in possession of summaries issued by the engineering department, respective parts of the factory start producing materials necessary for execution of the floors in the work plan ( 4 . 1 and 4 . 2 ); sending the resistant supports for dispatch ( 5 ): once all the materials have been produced by the respective parts of the factory, a logistics department is activated and the materials are separated and checked to be sent to the work site ( 5 . 1 and 5 . 2 ); storing the supports inside a modular box ( 6 ): after separating the resistant supports, a responsible employee checks quantity and size of the supports and assembles then, as stipulated in the work plan, modules and sub-modules of the box, allocating each support in its proper place ( 6 . 1 and 6 . 2 ); sending to the work site ( 7 ): with all the materials checked and packed, the logistics department prepares invoices and a transport packing list to be sent to the work site ( 7 . 1 and 7 . 2 ); storing the modular box on the work site ( 8 ): after the assembled modular box leaves a warehouse, the modular box is received by a person in charge of the work upon arriving at the work site ( 8 . 1 ), the person in charge of the work checks the materials received and stores the checked materials in an appropriate place ( 8 . 2 ); sending the work plan to the person in charge of the work ( 9 ): following all steps and with all checklists checked, a regional manager sends the work plan to the person in charge of the work through a contact e-mail work carried out by the engineering department ( 9 . 1 and 9 . 2 ); executing of the work plan: executing the work plan comprising the following actions: i. Upon arriving at the work site, a person in charge of the client checks with the person in charge of the work if pavement is already ready to be assembled ( 10 . 1 ), if the pavement is ready to be assembled, the person in charge of the work checks the sent project with the pavement that will be assembled ( 10 . 2 . a ; 10 . 2 . b and 10 . 2 . c ); ii. If the work has crane for heavy vertical transport, then transport a complete set of accessories and supports ( 10 . 3 . a ); if the vertical transport equipment is a winch, transport the complete individual modules ( 10 . 3 . b ); if there is no equipment for vertical movement, transport only sub-modules ( 10 . 3 . c ); iii. Carry out demarcation of a first solid slab with marker pens, as ordered by the work plan ( 10 . 4 ); iv. Fix prestressing accessories to a side panel as indicated in the work plan ( 10 . 5 ); v. After checking the demarcation, carry out assembly assistance by positioning the resistant supports for solid slabs of each module in their respective location, according to the work plan ( 10 . 6 ); vi. With all the resistant supports for solid slabs in their respective places, fix the resistant supports to positive reinforcement of the solid slabs, as indicated in the work plan ( 10 . 7 ); vii. When all the resistant supports are fixed, the greased ropes are positioned on the resistant supports ( 10 . 8 ) and tying the greased ropes to the resistant supports with annealed wire over the resistant supports ( 10 . 9 ); viii. As soon as the step vii is finished, a general supervisor or a unit manager checks assembly and, as necessary, corrects errors or approves the first solid slab for a next step ( 10 . 10 ).

Description

CROSS REFERENCE TO RELATED APPLICATIONS Continuation of International Application No. PCT/BR2021/050236 filed on Jun. 1, 2021, which application is incorporated herein by reference in its entirety. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT Not Applicable. NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT Not Applicable. BACKGROUND This disclosure refers to an assembly method for greased, plastic coated and prestressed tendons, consisting of a work plan, an intelligent and reusable modular structure (modular box), a resistant support and a fixer for tendon in resistant support, aiming to solve problems of storage, productivity, transport, construction process, generating improvement in technical qualification, thus obtaining a faster, more accurate and safer conference, associated with the color system inserted in the design plan work. TECHNICAL FIELD This disclosure applies to the field of Civil Construction, especially in the execution of prestressed massive flat slabs. BACKGROUND The application of prestressing greased tendons on slabs has been the structural solution that has shown the greatest growth in recent times. Although some structures with prestressed slabs were first executed in Europe, the real development of these structures took place in the USA, and could grow much more through greater dissemination of this application among professionals in the area, especially those who have not yet had contact with prestressing. In Europe, interest in this form of construction was renewed around the 1970s. Some constructions were carried out in this period, most notably in Great Britain, the Netherlands and Switzerland. Prestressed slabs with non-adherent tendons have been used for over 50 years in the United States. Subsequently, an anticorrosive protection was developed consisting of a polyethylene or polypropylene tube and a secondary protection consisting of a special grease that involves the tendon (greased and plastic coated tendons). The document U.S. Pat. No. 4,008,916 A (IDE ALLAN R) relates to cargo handling devices and more particularly to devices for collecting a plurality of pieces of cargo together in unit form for transport as a one-point unit to another. The document BR 102018068999 A2 (BOEING CO [US]) generally refers to systems and methods for lifting and moving objects. More particularly, the present disclosure relates to a system and method for lifting relatively large, heavy and irregularly shaped objects, such as internal components for an aircraft. The document JP 2004278076 A (TAKAHASHI SEISAKUSHO KK) refers to a spacer that can be used as two types of reinforcing steel for a prestressed concrete structure and a protective sheath of PC cable. The document JP H01318642A (TAKENAKA KOMUTEN CO) discloses a way intended to easily fix cross reinforcements by forming notched grooves to fit the externally crossed reinforcements in the peripheral walls of a shell body, and providing the notched grooves, with entry sections of groove widths greater than the reinforcement diameters and the removal of impermeable sections from groove widths smaller than the reinforcement diameters. The document JP H0748898 A (KAJIMA CORP) refers to a plurality of unalloyed PC steel wires grouped in advance with a spacer assembly template. In Brazil, the use of greased and plastic coated wire tendons only became viable from 1997 onwards, with their manufacture by Companhia Siderurgica Belgo-Mineira. Ever since, this new technology has been widely used, mainly in smooth flat slabs, adequately controlling deflections and cracking, obtaining an excellent quality structure. Prestressed flat slabs have a reduced height and, as they do not have beams, allow total flexibility both in the distribution of pipes and ducts, and in the arrangement of dividing walls, and are therefore indicated both in office buildings and in apartment buildings. The main advantages offered by prestressed concrete for slabs are: a) Structure tested in real time;b) Control of deformations generating a load contrary to the permanent weight;c) Decrease in the number of beams and pillars;d) Weight reduction reducing the cost of foundations;e) Flat slabs;f) Larger spans;g) Ease of assembling the molds, generating lower labor costs;h) Freedom of space inside the building;i) Architectural freedom. The constructive process is usually done with positive reinforcement distribution; distribution, fixing and locking of greased tendons; placement of negative reinforcement and, finally, concreting. It so happens that currently the process of distributing, locking and fixing the greased tendons is done on steel bars, placed transversely to the tendons, which have a predetermined elevation, guaranteed by plastic supports that have different heights. This locking is done using wire, fixing each tendon and plastic support to the transverse bar, which entails laborious and time-consuming labor. It is worth mentioning that the plastic su