DE102004038896A1 - Base plate pre-arrangement method, involves passing base plate through drill hole having smaller diameter, where deep floor plastering with larger diameter takes place under base plate - Google Patents

Abstract

The method involves passing a base plate through a drill hole having smaller diameter. A deep floor plastering with larger diameter takes place under the base plate. The process steps are implemented together with a drill pipe attached bore and mixed tool without pulling a drill pipe. The deep floor plastering takes place with the diameter that is variable by the height. An independent claim is also included for a bore and mixed tool.

Description

The The invention relates to a method for searching under foundations in shape of floor slabs, single or strip foundations. starting point such processes are subsidence phenomena on already completed Buildings that need to be balanced.

The The invention further relates to a drilling and mixing tool in conjunction with a rotary drivable drill pipe, wherein the drilling and mixing tool a coaxial to the drill pipe aligned central part and at least two individual on the central part includes foldable movably arranged folding cutters.

From the US 4,701,078 is a drill string with a drill bit at the bottom known, which has cutting above the drill bit, which can be applied to the drill string and can be spread apart from the drill string via an actuated by pulling rope outer sliding sleeve. This device serves to create in the course of the production of an in-situ concrete pile underground a cavity enlarged in relation to a borehole into which concrete is later to be supplied via a pouring pipe for forming an enlarged pile foot.

deviant This is the object of the present invention, a Provide method for securing the foundation of the type mentioned.

• – das Fundament in einem Bohrloch mit einem ersten kleineren Durchmesser durchfahren wird, und
• – unterhalb des Fundaments eine tiefe Bodenvermörtelung mit zumindest einem zweiten größeren Durchmesser stattfindet.

The solution consists in a method of searching for foundations, in which

• - the foundation is traversed in a borehole with a first smaller diameter, and
• - Underneath the foundation takes place a deep Bodenvermörtelung with at least a second larger diameter.

in this connection is provided in particular, the aforementioned method steps next to each other with one on a drill string fixed drilling and mixing tool without intermediate pulling of the drill string perform. After boring the foundation, the drill bit used and mixing tool increased in diameter, wherein a binder supplied and mortified with the ground becomes. This will be a subsequent founding of the foundation causes the increase in carrying capacity or the compensation of settlement phenomena. The procedure can Distributed several times on individual foundations according to a grid execution come. The said at least one larger diameter in the range the Bodenvermörtelung can be set as needed. He can also talk about the height of Mortar column varies become.

Farther The object underlying the present invention is to provide a boring and mixing tool to be used in the aforementioned method for Application can come.

The solution therefor consists in a drilling and mixing tool in conjunction with a rotating drivable drill pipe, wherein the drilling and mixing tool coaxially aligned with the drill string Central part and at least two individual beiklappbar to the central part movably arranged folding cutters, wherein the folding cutters hinged to any diameter and preferably stepless be set, and wherein outlet nozzles provided on the drilling and mixing tool are over the drill pipe with liquid Medium are supplied. Adjusting to different diameters can be constructive as stepless adjustment or as adjustment be created in individual steps. As a liquid medium can during the Drilling operation with the folding flaps cut water ver used be while after unfolding the folding cutters to the desired Diameter may instead be supplied to binder to bring about a Bodenvermörtelung.

Herewith is given a drilling and mixing tool, by means of said Actuating means in a first position of small diameter can be brought For example, solid cover layers or foundations with small To pass through diameter, and in stages or continuously on larger diameter can be adjusted to include soil improvement areas with enlarged diameter with mixing of the soil with supplied suspension produce. In a particularly favorable execution Here are the folding blades aligned so that their mid-planes the transverse to the longitudinal axis of the drill string comprise lying pivot axes. This allows for an improved Storage and support, for others higher specific cutting forces at the folding blades for a given torque of the drill string. In better execution the folding cutters have toothed elements at their front edge, which may consist in particular of hard materials.

• – am Mischwerkzeug ist unten eine Bohrkrone befestigt,
• – zwischen Mischwerkzeug und Bohrkrone ist ein Aufreibelement angeordnet.

According to further advantageous embodiments, the following features are proposed for the drilling and mixing tool according to the invention:

• - The mixing tool is below a drill bit be consolidates,
• - Between mixing tool and drill bit a Aufreibelement is arranged.

• – eine Betätigungsstange für die Klappschwerter wird im Bohrgestänge angeordnet, die von Hydraulikzylindern betätigt wird, die sich auf einer Konsole am oberen Ende des Bohrgestänges abstützen,
• – die Konsole ist mit einem Wirbel verbunden, an dem das Bohrgestänge aufgehängt ist,
• – das Bohrgestänge ist durch einen Durchsteckdrehkopf geführt und wird über diesen angetrieben,
• – das Bohrgestänge besteht aus zwei ineinanderliegenden Rohrsträngen, durch die flüssiges Medium zwei verschiedenen Gruppen von Austrittsdüsen im Bohr- und Mischwerkzeug und/oder in der Bohrkrone geführt werden kann.

For the associated drill pipe, the following features for the design of the tool are mentioned:

• An operating rod for the folding blades is arranged in the drill pipe, which is actuated by hydraulic cylinders which rest on a console at the upper end of the drill pipe,
• - the console is connected to a swivel on which the drill string is suspended,
• - The drill pipe is passed through a through-boring head and is driven by this,
• - The drill pipe consists of two nested pipe strands through which liquid medium two different groups of outlet nozzles in the drilling and mixing tool and / or in the drill bit can be performed.

One preferred embodiment The invention is illustrated in the drawings and will become apparent below described.

• a) in Seitenansicht,
• b) in Stirnansicht;

1 shows an inventive drill string on a drill mount in use

• a) in side view,
• b) in front view;

2 shows the drill pipe 1 in enlarged detail;

• a) in Seitenansicht,
• b) in Draufsicht;

3 shows significant parts of the drill string 2 in an enlarged view

• a) in side view,
• b) in plan view;

• a) im Vertikalschnitt,
• b) in Draufsicht;

4 shows the parts of the drill string 3

• a) in vertical section,
• b) in plan view;

5 shows the implementation of the method according to the invention on a foundation plate;

6 shows the implementation of the method according to the invention on a building.

The two representations of 1 will be described together below. On a soil surface 11 is a drill 12 on which a drill carriage 13 is attached. At the drill rig 13 is about leadership 14a . 14b a drill pipe 15 attached. The drill pipe 15 is through a turret 16 guided and with a tensioning device 17 clamped rotating drivable. The drill pipe 15 is at a vortex 18 rotatably suspended. From the drill pipe 15 centrally led out is an operating rod 21 , which rotates with the drill pipe and another vortex 22 is suspended. The operating rod 21 is via hydraulic cylinder 23 that is on a console 24 brace and on a yoke 25 act, axially actuated. At the bottom of the drill string 15 is a mixing tool according to the invention 20 with a central part 26 and radially projecting flap cutters 27 , At the bottom of the mixing tool 20 is a drill bit 28 attached.

In 2 is the drill pipe 15 recognizable as an enlarged detail, wherein the same details are denoted by the same numerals as in 1 , The drill string consists of an outer tube 15 ₁ and an inner tube 15 ₂ , which are held by unillustrated spacers coaxial with each other. In the annular space between outer tube and inner tube on the one hand and in the inner cross section of the inner tube on the other hand, various media can be passed from the upper end to outlet nozzles at the lower end of the drill string. Of these are first nozzles 31 ₁ . 31 ₂ at the mixing tool 20 recognizable and further nozzles 32 on the drill bit 28 , Between mixing tool 20 and drill bit 28 is a Aufreibscheibe 29 arranged.

At the mixing tool 20 are the continuously adjustable diameters of the folding cutters 27 ₁ . 27 ₂ recognizable. At the upper end of the drill string 15 are the turret 16 with tensioning device 17 and the vortex arrangement 18 recognizable. The pull rod and its actuating means are not shown here.

In 3 the individual representations will be described together below. In detail, first the mixing tool 20 with the central part 26 and the adjustable folding cutters 27 ₁ . 27 ₂ described, the latter being shown in their various possible positions. The mixing tool according to representation b) is to be understood as dextrorotatory, wherein cutting edges 33 ₁ . 33 ₂ at the folding cutters 27 ₁ . 27 ₂ are equipped with teeth. At the mixing tool 20 are still the nozzles 31 ₁ . 31 ₂ recognizable. The mixing tool 20 is at the drill pipe 15 attached. Of the actuators for the folding cutters 27 ₁ . 27 ₂ are the console 24 and the hydraulic cylinders 23 ₁ . 23 ₂ recognizable over the yoke 25 and the Winkell 22 on the operating rod 21 act. Furthermore, the vortex 18 for the drill pipe 15 recognizable. For this is a channel 34 for the supply of the linkage 15 led out with liquid medium.

In 4 are the same details as in 3 provided with the same reference numerals. In the sectional view are still in two positions steering lever 35 ₁ . 35 ₂ for the folding cutters 27 ₁ . 27 ₂ to recognize, which are rigidly connected with the latter. On this steering lever 35 ₁ . 35 ₂ act handlebar arms 36 ₁ . 36 ₂ one, each with the lower end of the actuating rod 21 over a pivot point 37 and with the steering levers 35 ₁ . 35 ₂ about joint points 38 ₁ . 38 ₂ are connected. As are the steering levers 35 ₁ . 35 ₂ cross over, they swing in different levels.

In 5 An inventive method for the foundation of a foundation is shown in three phases.

Illustration a) leaves a foundation plate 41 recognize, under the grown soil 43 lies. A drilling apparatus comprising a drill string 15 , a reduced diameter mixing tool 20 and a drill bit 28 , penetrates the foundation plate 41 ,

In illustration b) is the foundation plate 41 from a hole 44 interspersed, the mixing tool has reached its lowest position. In this position are cutting elements 27 folded out of the mixing tool, so that the diameter of the mixing tool is now greater than that of the bore 44 ,

In illustration c), the mixing tool described above 20 now pulled up with the application of suspension, wherein a Vermörtelungskörper 45 with opposite the bore 44 in the foundation plate 41 larger diameter is produced, the additional foundation for the foundation plate 41 forms. Shortly before reaching the foundation plate is the mixing tool 20 return to the state as shown in illustration a) to allow it through the hole 44 can be returned.

In 6 an inventive method for undertaking a building foundation is shown. It is a foundation 41 ' with a raised wall 42 to recognize, taking under the foundation 41 grown ground 43 lies. The foundation 41 ' is a strip foundation under a floor slab 41 executed, which can continue to the right. A drilling apparatus comprising a drill string 15 , a reduced diameter mixing tool 20 and a drill bit 28 , penetrates the foundation 41 ' outside next to the wall 42 ,

In illustration b) is the foundation 41 ' from a hole 44 interspersed, the mixing tool 20 has reached its lowest position. In this position are cutting elements 27 of the mixing tool 20 unfolded, so that the diameter of the mixing tool is now larger than that of the bore 44 ,

In illustration c), the mixing tool described above 20 now pulled up with the application of suspension, wherein a Vermörtelungskörper 45 with opposite the bore 44 in the foundation 41 ' larger diameter, which provides a lateral underpinning for the foundation 41 ' forms at the edge of the building. Shortly before reaching the foundation is the mixing tool 20 return to the state as shown in illustration a) to allow it through the hole 44 can be returned.

11

ground

12

caterpillar

13

gun carriage

14

guide

15

drill pipe

16

Rotary union

17

chuck

18

whirl

19

20

mixing tool

21

pull bar

22

whirl

23

hydraulic cylinders

24

console

25

yoke

26

Central part

27

cutting element

28

drill bit

29

reamer

30

31

jet

32

jet

33

cutting edge

34

feed

35

control arm

36

handlebar lever

37

fulcrum

41

foundation

42

wall

43

ground

44

drilling

45

Vermörtelungssäule

Claims (12)

Method for the analysis of foundations ( 41 ), in which - the foundation ( 41 ) in a borehole ( 44 ) is passed through with a first smaller diameter, and - below the foundation ( 41 ) a deep Bodenvermörtelung ( 45 ) takes place with at least a second larger diameter. Method according to claim 1, characterized in that that the Process steps consecutively with a drill pipe attached to a drill pipe and mixing tool without intermediate pulling of the drill string are performed. Method according to one of claims 1 or 2, characterized that the deep Bodenvermörtelung with one over the height variable diameter takes place. Drilling and mixing tool ( 20 ) in conjunction with a rotationally drivable drill string ( 15 ), wherein the drilling and mixing tool ( 20 ) a coaxial with the drill string aligned central part ( 26 ) and at least two individual on the central part beiklappbar movably arranged flap cutters ( 27 ), characterized in that the folding cutters ( 27 ) are hinged to different diameters, and that outlet nozzles ( 31 . 32 ) on the drilling and mixing tool ( 20 ) are provided, which via the drill string ( 15 ) are supplied with liquid medium. Tool according to claim 4, characterized in that the folding cutters ( 27 ) are adjustable and fixable on continuously variable diameter. Tool according to one of claims 4 or 5, characterized in that the folding cutters ( 27 ) transversely to a longitudinal axis of the drill string ( 15 ) extending pivot axes are arranged movably movable. Tool according to one of claims 4 to 6, characterized in that on the drilling and mixing tool ( 20 ) below a drill bit ( 28 ) is attached. Tool according to one of claims 4 to 7, characterized in that between mixing tool ( 20 ) and drill bit ( 28 ) a Aufreibelement ( 29 ) is arranged. Tool according to one of claims 4 to 8, characterized in that an actuating rod ( 21 ) for the folding cutters ( 27 ) in the drill string ( 15 ) arranged by hydraulic cylinders ( 23 ), which is located on a console ( 24 ) at the upper end of the drill string ( 15 ). Tool according to claim 9, characterized in that the console ( 24 ) with a vortex ( 18 ) to which the drill string ( 15 ) is suspended. Tool according to one of claims 4 to 10, characterized in that the drill string ( 15 ) by a turret ( 16 ) is guided and driven by this. Tool according to one of claims 4 to 11, characterized in that the drill string ( 15 ) of two nested pipe strands ( 15 ₁ . 15 ₂ ), through the liquid medium two different groups of outlet nozzles ( 31 . 32 ) in the drilling and mixing tool ( 20 ) and / or in the drill bit ( 28 ) can be supplied.