DE2130765B1 - Device and method for producing the grouting body of a grouting anchor - Google Patents

Description

3 4

point. In this case, at the air-side end of a connection Fig. 6, a cross section through a compression molding line a flow regulating valve arranged anchors with representation of the compression outlet openings

be. in another embodiment.

Furthermore, a compression line can all compression In the embodiment according to FIG. 1 is to be common in sections; It is also possible for a plurality of the schematically illustrated borehole 1 to be combined into injection lines in one or more multi-channel lines which are not shown for the sake of simplicity. Finally, tension members can be used and all of the borehole 1 or part of the lines can be filled with a cement mortar. There is now the bypass valves to be connected to one another. would give the floor along the grouting section V.

The lines can be used one or more times to compress grouting material

shaped around the tension member of the grouting anchor around a higher adhesion between grout 2 and

be led. The turns of the ring can reach the bottom.

Lines in planes perpendicular to the tension member axis For this purpose, two are in the borehole 1

or grouting line leading to each grouting section V on a helical line around the tension member axis

lie. The outlet openings are expediently introduced * 5 gen3, 4. Referring to Fig. 1, there are two

wise on the outer boundary line of the individual injection lines 3 and 4 on their earth-side

Ring lines arranged. End 6 connected to each other; along the

The outlet openings can, however, also be pressed by pressing section V , pressing openings 5 are attached.

a cuff surrounding the injection line.

be covered, the ends of which are radially to the 2 ° For pressing, both ends on the air side

Forms injection line extending, valve-like nose. the injection lines 3 and 4 to a common

According to the method according to the invention, the compression head 7 is connected. The grouting material

worked in such a way that the pressing of each pressing ¹⁰ occurs in the direction of arrow 8 in the pressing

section through both injection lines head 7 and through the injection openings 5 in the

takes place at the same time and then the floor or other cavities out. The pressure

pressure lines can be cleaned in the flow or can be observed via a pressure gauge 9,

that both the grouting and cleaning. The grouting pressure compacts the soil;

of the injection lines are carried out in the flow. the resulting cavities are pressed

The advantage of the device according to the invention material 10 filled. After finishing a grouting primarily to be seen in the fact that a possible phase, the compression head 7 is removed and in One end of the line water for flushing the line section was pumped in around the individual grouting along the grouting section of a grouting system. The water entry is at 11 Press anchors as often as desired and in any number of rows and the water outlet indicated at 12. The flow sequence also at the same time, flawlessly to the direction can of course also vice versa can. There will be less emphasis on a 35 if possible.

far-reaching and complete penetration of the In F i g. 2 shows a modified principle. The ground is laid with grouting material, but here is the grouting line 13 under the intermediate shell Degree of consolidation of the soil around the attachment of a manometer 15 to a pump 16 anchoring section aimed at. Increasing grouting closed while the grouting line 14 was also pressing show the degree of load capacity failure 4 ° if a manometer has 17, but over a improvement of the soil. Flow regulating valve 18 and a connecting line

Another advantage of the device according to the 19 in a container 20 with molding material 10 mün-

finding is that a grouting anchor that det. From the container 20 a line 21 leads to

despite all caution because of a weak zone in the pump 16.

Bottom fails when tightened, not abandoned 45 During the grouting operation, the container becomes 20 must be, but by a post-injection via line 21 in the direction of arrow 23 Verauf its full carrying capacity can be brought. Pressing material 10 sucked and over the Verpreß-Die Invention also creates the prerequisite line 13 pressed. With the flow closed for that along the entire anchorage regulating valve 18 penetrates the full amount of the stretching a uniformly high compression pressure on 50 compression material 10 through the compression openings 5 in can be built so that an evenly good soil. The one displayed on manometer 17 Adhesion along the entire anchoring route then corresponds to the pressure applied to it arises which the load-bearing capacity of the grouting anchor nearest grouting opening 5 prevails. Will decisively influenced. the flow regulating valve 18 partially or entirely

In the drawing, exemplary embodiments of 55 are open, so the penetrating into the ground is directed

Device according to the invention shown. It shows the end and the back through the connecting line 19

F i g. 1 a schematic longitudinal section through a running amount after the grouting and piping

Embodiment of the device according to the resistance. This makes it a pump-independent one

finding with a compression section, regulation of the compression pressures or compression

Fig. 2 is a schematic longitudinal section through so amount possible. The one attached to the pump outlet

Another embodiment with a compression manometer 15 gives the respective reference pressure

section, on.

Fig. 3 is a schematic longitudinal section through After completion of the compression phase, how

an embodiment with three compression sections, above in FIG. 1 described, water for

F i g. 4 different examples of multi-chamber flushing in the pipe system with the through-pipe open combined injection lines, flow regulating valve 18 pumped in. Water inlet and

Fig. 5 shows a cross section through the grouting anchor-outlet are again indicated by arrows 23, 24-

with representation of the compression outlet openings and tet. This arrangement of the injection lines 13,14

5 6

has the advantage that the pressing material 10 is split into the pressing body 2 by tensile forces and

Lines always remain in motion and there is no danger of the grouting material 10 entering the specified

blockages are to be expected. NEN areas against low resistance allows.

This in FIGS. 1 and 2 only schematically and it is achieved that the grouting material 10 simply indicated grouting lines 3, 4, 13, 14 5 emerges at precisely defined points and the opening, as shown in FIG. explosion pressure does not become too high. The Verpreßöffnunvielfachen, so that several Verpreßabschnitt V ₁ , gen 5 should also be designed so that Verpreß- Vz, F ₃ to create in the anchoring, the material 10 exit from the Verpreßlinien, are pressed independently of each other controlled but not back into the Injection lines can enter. In doing so, these grouting lines can be in io. Since the pressing process usually combines several, many possible combinations in order to take place one after the other at the same point, the device should be adapted to the respective circumstances, and the washing process carried out in between should fit. For example, a common supply can also cover the compression openings 5,
line for several grouting lines with grouting with centrally located tension members 25 (Fig. 5) openings S can be provided. These injection lines 15 can be provided with the injection openings 27 can also be partially or completely connected to one another by one-way valves or ring line 26 at one or more points. the tension member 25 be laid around. This ring line

In FIG. 4 are some examples of such connections. 26 is connected to the injection lines 3, 4,

compression lines shown, the compression openings 27 to multi-chamber profiles are over the entire area

are connected to each other. In this case, the catch is arranged in a distributed manner so that the blasting of the

moderately the compression compression body 2 located in the center and the outlet of the compression material

line as a feed line and the ring-shaped outside 10 can take place at its weakest point 28,

grouting lines arranged around it as a return Here the grouting is essentially carried out radially,

lines used with the injection openings. The case of external tension members 29 and centrally

individual injection lines can also be arranged in different ways.

take on tasks. You can, for example, line 30 compression openings 31, which are

like pressing, washing, the fretted shear 32 are covered. This creates at the

development of wires and as a protective chamber for this point, where the two parts of the cuff 32

to serve. form a valve-like nose 33, a zone of weakness

The compression 30 in the compression body 2 is also of particular importance, so that the compression pressure

openings 5, which cause the pressing material 10 to burst open there and the pressing

should possible, on the shortest route to the material 10 between two tension members 29 through

Joints between the compression body 2 and can emerge. The lips around the nose 33

To get to the bottom. For this purpose, the Verpreßöffnun- are designed so that they can only be opened by pressure

gene 5 either open in close proximity to the floor joint 35 from the inside and thus only grouting material

or it must be ensured that the V 10 can pass in one direction.

1 sheet of drawings

Claims (12)

The invention relates to a device and a method for producing the pressing 1. Device for producing the compression body of one or more tension members on body a grouting anchor having one or more tension members, in particular one pointing grouting anchor, in particular a 5 in cohesive soil, consisting of an air-side those in cohesive soil, consisting of one with grouting material, e.g. B. cement slurry, on the air side with grouting material, e.g. B. cement-sendable injection pipe, the grout on the earth side, chargeable injection pipe that has openings in the ground. side has compression openings, as a result of which it is known for producing the compression body marked that for each grouting io (magazine "Baumaschine und Bautechnik", 1966, section (F ₅ V ₁ , F ₂ etc.) two grouting lines connected to one another by drilling (3, 4; 13, pipe. Here, up to the final depth 14; 30), the press opening (5, 27, 31 ) exhibit. 15 put a compression head and the bottom through 2. Apparatus according to claim 1, characterized in that this drill pipe is pressed through by the drill characterizing that at the air-side end of a tube is gradually withdrawn in order to keep the two injection lines (3, 4; 13, 14) a not yet compressed section of the Flow regulating valve (18) is arranged. To release the borehole. A disadvantage of this process 3. Apparatus according to claim 1 or 2, da- 2 ° _r ens is that the pressing process only once and only characterized in that one of the Verpreß- in a prescribed order, namely from the lines of all the pressing sections (F ₁ , F, F ₂ ) The bottom of the borehole is common towards the air side. can be performed. There is also the risk that 4. Apparatus according to claim 3, characterized in that the grouting material instead of being drinked into the ground that several injection lines in 25 gene, between the borehole wall and the outer surface of the jacket a multi-channel line or several multi-pipe rises and uncontrolled in sewer lines are grouped together. gives way to other soil horizons. 5. Device according to one of claims 1 To also with soils not injectable per se, to 4, characterized in that all or especially in cohesive soils, secure anchoring It is known to achieve part of the injection pipes with one-way 3 ° strings (»Schweizerische valves are interconnected. Bauzeitung «, 1970, pages 921 to 929), the floor 6. Device according to one of claims 1 in sections and repeatedly using to 5, characterized in that the compression high compression pressures to blow open and it up lines in the form of ring lines (26) to enforce in this way or with grout the tension member (25) of the grouting anchor around 35 to compress it and carry out a larger one are. to reach knife of the grout. To this 7. Apparatus according to claim 6, characterized in that, after completion of the borehole in indicates that the ring lines (26) inserted into this a sleeve tube, the wall of which Tension member axis are perpendicular planes. at axial intervals with distributed around the circumference 8. The device according to claim 6, characterized in that there are 40 holes, the outside of which are elastic indicates that the ring lines (26) are covered on rings, which check valves lie on a helical line. for the compression that is pressed through these openings 9. Device according to one of claims 6 form molding material. Through one in this manbis 8, characterized in that the Verpreß- cuff pipe inserted double packer, the Openings (S, 27) on the outer circumference of the individual 45 each have one, a ring of outlet openings on-ring lines (26) are arranged. pointing, pipe section limited, can now any 10. Device according to one of claims 1 cuff valve are pressed independently, to 5, characterized in that the Verpreß- disadvantage of this method is that it is through the openings (31) of one, the respective grouting multiple installing and withdrawing the packer line (30) surrounding cuff (32) 50 as well as the washing required in the meantime are covered, the ends of which are radially to that of the sleeve pipes extraordinarily Arbeitsauf wen-Verpreßleitung (30) extending valve-like dig is. Furthermore, the is also liable for this procedure Form nose (33). Disadvantage that the individual compression openings only 11. A method for producing the Verpreß- can be pressed one after the other when a body of a grouting anchor using 55 precise control of the grouting result for each of the device according to one of claims 1 grouting is required. This increases the bit 10, characterized in that the total grouting time of a grouting anchor is considerable,
pressing each grouting section by the object of the invention is to create a possibility for both grouting lines to take place at the same time and to create this targeted, repeated grouting that subsequently the grouting lines in 60 of grouting anchors, especially in cohesive soils, are cleaned. to be able to accomplish safer and faster than 12. Method for producing the Verpreß- so far. body of a grouting anchor using this task is in a device of the one Device according to one of the claims 1 initially specified type according to the invention thereby to 10, characterized in that both the 65 solved that for each pressing section two on the earth side Grouting and cleaning of the grouting lines connected to one another take place in the run. are seen together in the relevant compression section at least one injection opening