DE2041758C3

DE2041758C3 - Device for injecting selected soil layers

Info

Publication number: DE2041758C3
Application number: DE19702041758
Authority: DE
Inventors: Franz 6451 Bruchkoebel Mayer
Original assignee: Johann Keller 6000 Frankfurt GmbH
Current assignee: Johann Keller 6000 Frankfurt GmbH
Priority date: 1970-08-22
Filing date: 1970-08-22
Publication date: 1974-03-21
Also published as: DE2041758B2; DE2041758A1

Description

schotte 7', die yon dem Injektionsmittel durchströmt werden kann, ist im Injektionsrohr 1 eine mit einer zentralen öffnung 4 versehene Trennwand 3 angeordnet, an die ein Zubringürrobr 5 angeschlossen ist. Das ZubringerrohrS erstreckt sich in Längsrichtung des Injektionsrohres 1 bis kurz vor dessen verschlossenem Ende und bildet mit ihm einen Kanal 8, der von der Abströmöffnung 11 aus der unteren Dichtungsmanschette 7 beschickt wird. Im Ruhezustand liegen die Dichtungsmanschetten 7 nnd 7' dicht am Injektionsrohr 1 unter einer gewissen Spannung an. Ein Kurzschluß vom unteren offenen Ende 9 des Zubringerrohres S zum Kanal 8 ist durch das Trennelement 10 unterbunden. Im Ausfiihrungsbeispiel ist die Vorrichtung in ein Bohrloch 12 abgesenkt dargestellt, von dem aus lediglich eine Bodenschicht 13 injiziert wird. Der Strömungsvermuf des Injektionsmittels in der Vorrichtung ist durch Pfeile angedeutet.bulkheads 7 'through which the injection medium flows can be, a partition 3 provided with a central opening 4 is arranged in the injection tube 1, to which a feeder office 5 is connected. The feeder pipe S extends in the longitudinal direction of the injection tube 1 until shortly before its closed end and forms a channel 8 with it, which is fed from the outflow opening 11 from the lower sealing collar 7. At rest the sealing collars 7 and 7 'lie close to the injection tube 1 under a certain tension on. A short circuit from the lower open end 9 of the feeder pipe S to the channel 8 is due to the separating element 10 prevented. In the exemplary embodiment, the device is shown lowered into a borehole 12, from which only a soil layer 13 is injected. The flow capacity of the injection medium in the device is indicated by arrows.

F i g, 2 zeigt eine Ausführun||smöglichkeit mit unterhalb der Trennwand 3 geteiltem Injektionsrohr, wobei das untere Teil 1" in das obere Teil 1' eingeschraubt ist. Das obere Ende des fest im uatep.n Teil 1" sitzenden Zubringerrohres S drückt sich dabeiFIG. 2 shows an embodiment with below the dividing wall 3 divided injection tube, the lower part 1 ″ being screwed into the upper part 1 ' is. The upper end of the firmly im uatep.n Part 1 "seated feeder pipe S is pressed

ίο gegen eine Dichtung 14 vor der Trennwand 3. Wenn diese Vorrichtung als »Einfachpacker« benutzt werden soll, wird das untere Teill" abgeschraubt und ein einfaches, mit Injektionsöffnungen versehenes Rohrstück (nicht dargestellt) angeschraubt.ίο against a seal 14 in front of the partition 3. If this device is to be used as a "single packer", the lower part "is unscrewed and a simple pipe section (not shown) provided with injection openings is screwed on.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

I ^ 2 selected soil layers, which with the borehole claims: for the 'lowering * of the injection pipe of course through- adir at least be cut

1. Device for injecting selected items to be hardened by injecting hardening agents Soil layers, consisting of one in a 5 stigen.

In known double packers of this type, an additional single packer working according to the same principle is screwed on above and below the outlet area compartment packer, inflatable by the injection device itself and, of course, the neighboring ones at the lower end Floor areas that can be applied elastically must be closed. Such a double p.xker has sealing cuffs, but has disadvantages in two respects,
characterized in that the one-time cannot be guaranteed with certainty, jection outlet openings (2) with respect to the fact that the other sealing cuff is also inflated in good time through the direction of flow of the injection agent behind and at d. ^; e borehole wall is applied to the outflow opening (11) from the lower seal 15, because the injection outlet openings from the inlet sleeve (7) are arranged and that in the flow channel to the second seal sleeve be-flow direction are sent behind the lower seal and are in front of it, and for andetungsmanschette (7) a device for enlarging the second screwed-on packer a certain degree of flow resistance is provided. measured a dead end that could not be flushed through, so that

2. Device according to claim 1, characterized by constantly the possibility of deposits and labeling, that within the there is encrustation at the end.

closed injection tube (1) before the Injek- The object of the invention is to provide a

tion outlet openings (2) to create a partition (3) Vo-direction of the type mentioned, in which

is arranged with an opening (4) from which, on the one hand, a seal is inevitably achieved

a feed pipe (5) open at the bottom at least 25 and on the other hand no longer the risk of a

up to the inflow opening (6) for the lower you- encrustation or the formation of deposits and

cuff (7) is guided so that the inflow lies behind.

opening (6) closer to the closed end of the This task is performed with a device of the one-injection tube (1) is arranged as the aforementioned type according to the invention thereby Flow opening (11) and that solved between the Injek- 30 that the injection outlet openings in relation tion pipe (1) and the feeder pipe (5) a caution to the flow direction of the injection agent nal (8) is formed by a between the downstream of the outflow opening from the lower you-inflow opening (6) and the discharge opening are arranged ventilation sleeve and that in through (11) arranged separating element (10) delimited the flow direction behind the lower sealing manist. 35 schette a device to enlarge the flow

3. Apparatus according to claim 2, characterized in that resistance is provided.

indicates that the outlet openings (2) This design ensures that the un-

for the purpose of greater throttling, the tere sealing cuff is kept smaller by the injection medium

than the inflow and outflow openings (6 and 11) tel is flushed, so that over time

there are no incrustations or deposits for the passage of the grout through 40

the lower sealing collar (7). and that the inflation of the lower seal

4. Apparatus according to claim 2, characterized in that the device cuff takes place before the injection medium indicates that the outflow opening (11) reaches the injection outlet openings.

The free cross-section is kept smaller than the to- Another advantage is therefore that

Flow opening (6) for the lower sealing man- 45 no injection before the inflation of the lower sealing

cuff (7). escaping agents and thus in soil layers

5. Device according to one of claims 2, which is just not for an injection to 4, characterized in that the Injek- are provided.

tion tube (1) formed in two parts and below Further embodiments of the device according to

of the partition (3) the lower part (1 ") of the 50 of the invention are given in the subclaims.

upper part (Γ) is designed to be connectable. ben. Of course, instead of an inflow opening and a discharge opening, a plurality of these openings may be present in each case.

The device according to the invention is the following

55 explained in more detail with reference to the graphic representation of exemplary embodiments.

In this illustration shows schematically

The invention relates to a device for injecting. 1 in section the device in the borehole

adorn selected soil layers, which are made up of inflated sealing sleeves and

an injection pipe 60 F i g that can be introduced into a borehole. 2 shows in partial section an embodiment of a

Injection tube divided with outlet openings for the injection medium.

stands, with above and below the outlet opening- The injection tube 1 is with injection outlet opening-

area of the injection material itself inflatable and openings 2 and above and below each with an inflatable

provided, elastically expandable sealing cuff T or 7, which can be placed on the adjacent floor areas,

see sealing sleeves are arranged. 65 In the area of the lower sealing collar 7 are

Such devices are under the designation inflow openings 6 and above, through a separating

"Double packer" design in different design elements 10 separated from it, outflow openings 11

known forms. They serve to be certain arranged. Under the upper sealing man-