BR202013026729U2 - Arrangement applied to compact continuous propeller drilling rig - Google Patents

Abstract

Arrangement applied to a compact continuous propeller drill, consisting of a drill formed from tracks between which there is a chassis holding a panel with a support table with pivot support and a tower-mounted lift cylinder provided at the end. A support shoe is provided at the bottom and a head is provided at the upper end, below which a drill head is projected followed by a hinge, said drill head receives an augmented upper auger, said chassis is fitted in the front section. a main winch, while the rear section is provided with a motor safe which holds an auxiliary winch, while the lower section is provided with leveling cylinders, and laterally said chassis projects auger racks, forming a compact perforation.

Description

“ARRANGEMENT APPLIED TO COMPACT PROPELLER DRILL CONTINUED”.

This utility patent application refers to a "CONTINUED PROPELLER DRILL APPLIED ARRANGEMENT", which was developed for the purpose of providing compact equipment for working on small and medium works, and for being small, facilitates drilling in small spaces.

Continuous propeller or CFA (continuous flight auger) piles emerged in the 1950s in the United States. The equipment for its execution consisted of a lattice boom crane, fitted with a rotating table coupled tower, which could make piles of diameter 275, 300 and 400 mm (Figure 2.1). In the early 1970s the executive process was implemented in Germany, and soon spread to all of Europe and Japan (PENNA et. Al., 1999).

In the 1980s, in the United States, Japan, and Europe, continuous propeller-type piles had a great development, initially in the adapted equipment and later, with specific and appropriate equipment for the execution of this type of pile. This executive pile method has become very popular and widespread in Europe, according to BRONS & KOLL (1988), mainly because of the technical advantages combined with the relatively low cost.

According to studies carried out by Van Impe in Europe (Great Britain, Austria, Italy, the Netherlands, Germany, Belgium and France), there was a tendency to use continuous propeller piles to replace excavated piles (Apud HART1KA1NEN & GAMBIN, 1991). ).

With the improvement of the specific equipment for its execution, the continuous propeller piles were undergoing changes in their executive method. Among the main and most important are the replacement of mortar by the use of concrete, the development of instrumentation allowing automatic monitoring of the execution of the pile, increase in diameters and depths, as well as increased power of equipment, which allowed the execution of these cuttings in various soil types (CAPUTO et al., 1997).

Continuous propeller piles were introduced in Brazil in 1987, with equipment manufactured from models used abroad. The equipment had a torque of 35 kN.m, propeller diameters of 275, 350 and 425 mm and allowed the execution of piles up to 15 m deep (ANTUNES & TAROZZO, 1996).

In Brazil, the first technical publication on continuous propeller-type cuttings took place in 1989, in Rio de Janeiro, during the XH ICSMFE, with the publication “ABEF Research on Foundation Engeneermg”, which reports the first research on this type of stake. in Brazil, held at CEUSP - Experimental Field of Foundations of the USP Polytechnic School (ABEF, 1989).

In this publication the continuous propeller-type piles studied were 350 and 425 mm in diameter. Static load tests were performed and one of them (HLC-4 - 0 425 mm) was instrumental in depth with strain gages at 3 levels (ABEF, 1989). MASSAD (1991c) had the opportunity to analyze this instrumented pile, comparing its performance with another excavated pile, installed in the same place (CEUSP). From the mid-1990s onwards, the Brazilian market saw an increase in the number of machines imported from Europe, mainly from Italy, built especially for the execution of continuous propeller piles with a torque of 90 kN.m over 200 kN.m, propeller diameters up to 1000 mm and capable of piling up to 24 m deep (ANTUNES & TAROZZO, 1997).

In the continuous propeller drilling rig the drilling rod is composed of a spiral plate propeller attached to a central tube. Its lower end has teeth that allow to cut the ground. In addition, a lid prevents soil from entering the central pipe during excavation and allows concrete to escape during concreting.

During the drilling process, at no time is the propeller extracted. This prevents soil relief during the excavation and concreting steps, making it possible to perform it on both cohesive and sandy soils, whether or not there is a water table.

When the specified design depth is reached, the concrete is pumped into the hole while removing the propeller. This system fills the voids evenly, preventing collapse of the drill walls and sectioning of the pile.

In general, the concrete used has a characteristic strength of 20Mpa, with a minimum cement consumption of 350Kg / m3, being optional the use of additives (NBR6122). The aggregates are summarized in sand and gravel, with slump between 20cm and 24cm, requiring the use of concrete pump. This pump is coupled to the drill with high pressure hoses.

At stake filling, the pressurized system is maintained until the auger is fully removed from the work surface. The state of the art shows the drill rig models below that reads: Self-propelled drill rig: Another type of drill rig found on the market, it is also characterized by its complex, heavy weight construction and needs to be transported to the jobsite by large, again falling into the problem of high operational cost to obtain stake, for example.

Finally, it should be emphasized that the use of pile-driving equipment has the side effect of generating very high vibrations, causing cracks in the adjacent buildings, thus affecting the said structures.

It turns out that all of these equipments are mounted on large machines, which makes them move to a costly and slow work area, which is not feasible for small buildings.

Because of these and other unspecified drawbacks the inventor, after a long period of study and testing, has developed the "CONTINUED PROPELLER DRILL APPLIED ARRANGEMENT" comprised of a drill formed from tracks between which there is a chassis holding a panel a support table provided with articulation support and a lift cylinder fixed to the tower, provided at the lower end with a support shoe and at the upper end is provided with a head, below which protrudes a drilling head followed by a hinge, said The drilling head receives an auger with an upper extender, said chassis in the front section a main winch, while the rear section is provided with a motor safe that holds an auxiliary winch, while the lower section is provided with leveling cylinders, laterally said chassis projects auger racks, forming a perforation compact matrix.

To give a perfect understanding of what has been developed, illustrative drawings are attached to which reference will be made in conjunction with a detailed description, where: Figure 1 shows a side view of the drill.

Figure 2 shows an opposite side view of the drill.

Figure 3 shows a rear view of the drill.

Figure 4 shows a top view of the drill rig.

As the drawings and their details show, it can be seen that the “PROPOSED APPLIED IN CONTINUED PROPELLER DRILL” comprised of a drill (P) formed from tracks (1) between which there is a chassis (2) holding a panel (3) a support table (4) with pivot support (5) and a lift cylinder (6) attached to the tower (7), provided at the lower end (8) with a support shoe (9) and at the upper end (10) is provided a head (11), below which a drill head (12) is projected followed by a hinge (23), said drill head (12) receives a auger (13) provided with an upper end. of a protonator (21), said chassis (2) accommodates in the front section (14) a main winch (15), while the rear section (16) is provided with a motor safe (17) which holds an auxiliary winch (18). ), while the lower section (19) is provided with leveling cylinders (20), with and said chassis (2) projects auger racks (22) into a compact drill rig.

Based on what is described and illustrated, it is clear that the “APPLIED APPLICATION OF CONTINUOUS PROPELLER DRILL” provides enormous advantages, since the equipment was developed compact to work in small and medium works, and since it is small it facilitates the drilling in Small spaces, besides being designed to carry your own tool! (auger) with its auger rack and its auxiliary winch. The operation of the equipment consists of drilling the ground where there is a freestanding sheet with the auger, and this has a hollow central rod through which the concrete to make the pile passes, and the auger is propelled by the drilling head that is leaked and passes a protractor inside it.

Because they meet all the requirements that define the utility model patent, because it combined and modified known elements, giving them a general innovative and industrializable aspect, and modifications that can be made without departing from the spirit and scope of the present patent, they are the following your claims.

CLAIM

Claims (1)

1 - “CONTINUED PROPELLER DRILL APPLIED ARRANGEMENT” characterized by a drill (P) formed from mats (1) between which there is a chassis (2) holding a panel (3) a support table (4 ) provided with pivot support (5) and a lifting cylinder (6) attached to the tower (7), provided at the lower end (8) with a support shoe (9) and at the upper end (10) is provided with a head (11), below which a drill head (12) is projected followed by a hinge (23), said drill head (12) receives a auger (13) provided superiorly with an extender (21), said chassis (2) ) houses in the front section (14) a main winch (15), while the rear section (16) is provided with a motor shaft (17) which has an auxiliary winch (18), while the lower section (19) is provided leveling cylinders (20), where laterally chassis (2) projects auger racks (22) forming a compact drill rig.