ES1057314U - Coupling head for premanufactured prestressed piles - Google Patents

Abstract

Splice head for precast prestressed piles, which includes a front plate and side plates that configure a recess that wraps the end sections of the piles, also including solid bodies and front protruding heads fixed to the plates, at the same time that these heads are They complement with holes that affect the front plates and solid bodies, also including fixing pins that are inserted through holes located perpendicular to the side plates and other holes (9) of the protruding heads that are previously inserted into the front holes in the union of two piles with prestressed cables, the heads and solid bodies being attached to bars, embedded in the material of the piles; characterized in that the ends of the prestressed cables (12) are jointly joined to the front plates (1) of the heads before the cables are relaxed; all in order to consolidate and strengthen the union between piles. (Machine-translation by Google Translate, not legally binding)

Description

Splicing head for prefabricated piles prestressed

Object of the invention.

The present invention consists of a head of splicing for prestressed precast piles whose purpose is greatly strengthen the attachment of the head to each of the ends of the prestressed piles so that at the time of join two consecutive piles using the splice heads of the invention, avoid deterioration in the extreme areas of the piles when once joined these are manipulated moments before proceeding when nailed or driven into the ground, and also during the operation of nailed, since in these cases there are mainly efforts of flexion and shear that affect especially in the zone of union, as well as in the future utility of it, being the element more resistant than the pile itself.

Background of the invention

Currently there are prefabricated piles to drive them on the ground with the utility of later supporting a construction structure, whether in bridges, buildings and in General any other construction.

There is a limitation in the manufacture of piles in terms of their individual length, and therefore sometimes it becomes necessary to join several sections of piles at their ends (normally two) to reach the required nailing depth in order to normally look for a firm ground, so that in these cases such piles incorporate at their ends some heads splicing to facilitate bonding and also to reinforce those areas in order to ensure the splice with guarantee, especially during the handling of the piles once spliced and more specifically when they are handled before and during the operation driving, as there are bending efforts that impact negatively on the piles, especially in the extreme sections of the piles where the splice is made.

However, the structure presented by these splice heads, as well as their fixing system, sometimes not they have enough resistance to withstand the efforts of flexion to those referred to above and therefore can be cause deterioration in the adjacent areas where the piles meet, which makes them unusable.

Description of the invention

In order to achieve the objectives and avoid drawbacks mentioned in the previous sections, the invention proposes a splice head for prefabricated piles prestressed that is characterized essentially because the ends of the prestressed cables that incorporate the piles are solidarity with the head itself, either by welding, threading or any other system

The head comprises a front plate and others side plates welded together, which form a recess that Wrap the ends of the pile.

This head incorporates in turn solid bodies, as well as short cylindrical extensions that emerge out frontally with respect to the front plate, also including holes in that plate that also affect the solid bodies, so that when you proceed to splice two piles, in a first phase the cylindrical extensions of a pile are introduced into the front holes of the other pile continuous, then coming into contact with the respective plates front of the two piles. To ensure fixation between the two piles, in a second phase some spikes are introduced by some holes that start in the side plates and that affect the  solid bodies, as well as cylindrical extensions, which apart from being fixed to the faceplates, they are attached to bars embedded in the concrete material of the pile. The bodies massifs are also attached to other similar embedded bars also in the concrete material of the pile itself.

The front plates of the heads have some holes where cable ends are introduced prestressed to later solidarity these to the plates.

Both solid bodies and extensions cylindrical they join to the bars by means of fixed union, being able to Run this joint with welding, tapping or other system.

Next to facilitate a better understanding of this descriptive report and being an integral part of the same accompany some figures in which with character illustrative and not limiting the object of the invention.

Brief description of the drawings

Figures 1 and 2.- Show views in perspective of two piles that are joined by the head of splicing for precast precast piles, object of the invention.

Figures 3 and 4.- They show some views in plan of the head of the invention.

Figure 5.- Shows a sectional view of the splice head that incorporates each of the extreme sections of the respective precast prestressed pile.

Description of the preferred embodiment

Considering the numbering that is adopted in the figures, the splice head for prefabricated piles prestressed is determined from a faceplate 1 and plates 2 sides joined all of them, while configuring a recess which surrounds each end section of the respective pile 3.

The heads incorporate some inside solid bodies 4 joined in solidarity with the plates, as well as some cylindrical heads 5 protruding from the plates front 1, also including front holes 6 in that plate 1 affecting solid bodies 4. The heads cylindrical 5 are also fixed to the front plates 1 of the respective heads.

With this provision described, in principle when two consecutive piles are spliced, they will be made match the cylindrical heads 5 of one of the piles 3 with the front holes 6 of another adjacent pile 3, thus contacting the respective faceplates 1 of the two piles to be joined 3.

Following this first operation to join the two piles 3, then, in order to ensure the fixation between the two, fixing pins 7 are introduced by holes 8 that start from the side plates 2 of the heads, holes 8 these which also obviously affect the  4 solid bodies, while facing holes diameters 9 of the cylindrical heads 5.

There is a small runoff between diametral holes 9 of the cylindrical heads 5 and the holes 8 of the side plates 2 and solid bodies 4; everything this in order to introduce the pins 7 when produce a firmer and safer union.

On the other hand, both solid bodies 4 and the cylindrical heads 5 are attached by fixing 10, to 11 bars embedded in the concrete material of the piles 3.

On the other hand, the prestressed cables 12 of the piles 3 are jointly and severally attached to the front plates 1. To do this, these faceplates 1 have small holes 13 where the ends of such prestressed cables have been introduced 12 to later secure their union, when they have not yet been relaxed wires 12, but after it has set and dried the concrete.

The connection of the front plate 1 to the braces or prestressed cables 12 constitutes a very important technical advantage because in this way it supports the zone of union of the piles 3 a great flexural and tensile strength, these efforts that mainly produced during the handling of piles 3 and the moments of the nailed or driven operation.

This will prevent deterioration and breakage in that junction zone, these problems that conventionally leave the unusable piles for the purpose that have been manufactured, both in the driving phase as in its future service stage.

Claims (2)

1. Splicing head for prestressed prefabricated piles, which includes a front plate and side plates that form a recess that wraps end sections of the piles, also including solid bodies and front protruding heads attached to the plates, while these heads are they complement with holes that affect the front plates and solid bodies, also including fixing pins that are introduced by holes located perpendicularly to the side plates and other holes (9) of the protruding heads that are previously introduced in the front holes in the union of two piles with prestressed cables, the heads and solid bodies being joined to bars, embedded in the material of the piles; characterized in that the ends of the prestressed cables (12) are joined in solidarity with the front plates (1) of the heads before the cables are tensioned; all in order to consolidate and strengthen the union between piles. 2. Splicing head for prestressed prefabricated piles, according to claim 1, characterized in that the connection of the prestressed cables (12) to the front plates (1) is carried out by means of small holes (13) located in those front plates (1) where the ends of the prestressed cables (12) are introduced, then secure the joint.