KR200359049Y1 - Apparatus for compression anchor using pack - Google Patents

Abstract

The present invention relates to a compact pack anchor that can exert a definite settling force in soft ground, landfill, sand gravel, stone bed and crushing zone. More specifically, by installing a pack outside the anchorage of the compression anchor anchor to pressurize the pack to form an expansion-expanded bulb without loss of injection material to pressurize and press the surrounding ground to provide a compressive pack anchor device that can increase the friction force will be.

Description

Apparatus for compression anchor using pack}

The present invention relates to a compressive pack anchor that pressurizes a pack formed at regular intervals to form a bulbous bulb. More specifically, soft ground, landfill layer, sand gravel layer, gypsum layer, ground layer with groundwater flow and fractured crushing layer are generally expected to lose injection material or it is difficult to secure required tensile force by general anchor construction due to low frictional resistance of ground. Pressurized packs installed at regular intervals outside the anchor anchoring section in the strata to form expanded bulbs, compress the surrounding ground to increase friction, and prevent the loss of injection material. will be.

According to the conventional anchor type anchoring method, the injection material is lost in the drilled hole during construction in the ground layer (the ground layer which is likely to cause injection material loss and the ground layer having low frictional resistance), and thus the frictional force cannot be expected, or the shear strength of the ground is small and the tip part is small. Due to the stress concentration generated, the anchor body is pulled out as the ground is first broken so that the tensile force cannot be exerted. In addition, the loss of the injection material was uneconomical because a considerable amount of injection was required to fill the surrounding voids to secure the required tensile force.

The object of the present invention is to provide an anchor body that can solve the disadvantages of the prior art as described above. More specifically, it is an object of the present invention to provide a fixing device capable of increasing friction by forming bulbs expanded by pressure injection without loss of injection material.

In addition, the present invention eliminates the possibility of recovering steel wires as well as permanent anchors by allowing the construction of compression anchors in layers where compression anchors are generally impossible or difficult to construct, such as soft ground, landfill layers, sand gravel layers, gypsum layers, and crushing layers. An object of the present invention is to provide a device that can be used as an anchor.

1 is an example of a cross-sectional view of the compression pack anchor installation according to the present invention.

Figure 2 is a detailed perspective view of the load bearing body, two steel wires, the injection pipe and the tip anchor head.

Figure 3 is a side view of the load bearing body, two steel wires, the injection pipe and the tip anchor head.

4 is a plan view of a load bearing body, two steel wires, an injection pipe, and a tip anchor head.

5 is a plan view of the load bearing body, one steel wire, the injection pipe, and the tip anchor head.

6 shows a cross section A-A.

Fig. 7 shows a cross section B-B.

8 is a cross-sectional view of the tip anchor head coupled to the steel wire and the steel wedge.

9 is a detailed perspective view of the tip cap installation.

10 is a detailed perspective view of the bearing body.

11 is a detailed perspective view of a packaging spacer.

12 is a detailed perspective view of the injection pipe.

<Brief description of the symbols in the drawings>

1: drilling hole 2: free ledger

3: fusing unit 4: un-bonded liner

5: injection pipe 6: injection hole

7: blockage 8: liner

9: injection material 10: packaging spacer

11: uneven part 12: steel wire hole

13: injection pipe hole 15: pack

20: Lower body 21: Lower body

22: pressure plate 23: tension member groove

24: uneven portion 25: tension member hole

26: hollow hole 27: thread

28: tension member guide groove 30: tip cap

31: Thread 32: Small connecting rod

33: large connecting rod 34: uneven portion

35: steel band 40: tip anchor head

41: steel wire spokes 42,42 ': thread

43: headcover

The present invention will be described according to the drawings.

1 is an example of a cross-sectional view of a compressed pack anchor installation according to the present invention, in which the un-bonded steel wire 4 is installed as required length in the longitudinal direction of drilling, and a plurality of injection holes 6 are formed radially at regular intervals in the longitudinal direction. And an injection pipe 5 having a closed portion 7 at an end thereof in the same direction as the Un-bonded steel wire 4, and capable of being packaged at regular intervals in the un-bonded steel wire and the injection pipe 10. ), And one end of the unbonded steel wire is fixed to the tip anchor head 40 provided with the steel wire wedge 41 to be symmetrical to the tension hole 25 having the thread 27 of the load-bearing body 20. When the screw thread 42 of the tip anchor head 40 is turned and fixed, the unbonded steel wire is naturally installed in the tension guide groove 28 of the inner body. If more than two steel wires are installed at 90 degrees with two or more load bearing bodies 20 spaced at an interval of about 1 m, the unbonded steel wire passing through the front load body passes through the lower load tension member groove 23 in the rear. It was made. At this time, in the hollow hole 26 in the center of the inner body, an even number of steel wires are injected to install an inlet pipe 5, and an odd number of un-bonded steel wires 4 are provided to install one strand of steel wire and an inlet pipe 5 ) Is installed in the tension member groove 23 of the pressure plate (22). After the installation of the steel wire is completed, connecting rods 32 and 33 provided with threads 31 at one end are connected to the threads of the hollow holes 26 of the bearing body of the preceding body. Cover the pack 15 to the spacer 10 and the large connecting rods (33) tied to the steel band (35) to fix and to the large connecting rods (33) by inserting the end cap (30) to complete the anchor body and drilling holes ( 1) When put into the pressurized injection, the pack 15 of the fixing part (3) is expanded to squeeze the ground surface of the drilling hole.

2 is a detailed perspective view of the load bearing body 20, the two steel wires 4, the injection pipe 5, and the tip anchor head 40. The hollow hole 26 is formed at the center of the load bearing body 20. As shown in FIG. It is further characterized in that the injection pipe 5 to be located in the center of the anchor body.

FIG. 3 is a side view of the load bearing body 20, the two steel wires 4, the injection pipe 5, and the tip anchor head 40, which pass through the tension member hole 25 of the pressure plate 22. FIG. The steel wire 4 was to be in close contact with the tension guide groove 28 of the lower body body 21.

4 is a plan view of the inner body 20, two steel wires 4, the injection pipe 5 and the tip anchor head 40, the lower body body 21 has an elliptical uneven portion 24. In order to increase the adhesion with the injection material 9, the tension member guide groove 28 is provided on both sides.

The contact force was raised, and tension member guide grooves 28 were provided on both sides.

5 is a plan view in which the load bearing body 20, one steel wire 4, the injection pipe 5, and the tip anchor head 40 are combined, and an un-bonded steel wire 4 is made of odd strands to pull in tension. It is characterized in that the hollow hole 26 is further provided in the central portion of the longitudinal direction of the lower body to be evenly transmitted to the lower body 20.

Figure 6 shows a cross-sectional AA, the load bearing body 22 has a tension member groove 23 so that the unloaded body and the lower body to which the two un-bonded steel wires are fastened at an angle of 90 degrees to be integrated at the time of installation. Thus, a plurality of unloaded steel wires 20 to which the unbonded steel wire is fastened can be installed in a zigzag manner (rotated at an angle of 90 degrees).

Fig. 7 shows a cross section B-B.

8 is a cross-sectional view of the tip anchor head in which a steel wire and a steel wire wedge are combined to allow an unbonded steel wire 4 to be inserted until a tapered section, and the exposed steel wire 8 is fixed by a steel wire wedge 41 to dismantle it. If possible, it can be used as a removable anchor when using steel wedges and as a permanent anchor when using fixed wedges. Threads 42 and 42 'are formed at both ends of the tip anchor head 40 so as to be screwed into the thread 27 of the bearing body 22 and the thread 42' of the head cover 43.

Fig. 9 is a detailed perspective view of distal end cap installation, so that when the anchor body is inserted into the drilling hole 1, the tip of the pack 15 installed outside the tension member is not broken, and the anchor body is inserted into the drilling hole 1; Long ability to be easy to put. Its configuration is provided at the end of a small connecting rod 32 having a thread 31 at one end and a small connecting rod at the end thereof so as to be connected to the thread 27 of the bearing body 22 of the load bearing body. Cover the pack 15 to the large connecting rods 33 having a concave-convex portion 34 can be fixed with a steel band 35 and to be installed by applying a force to the tip cap 30.

FIG. 10 is a detailed perspective view of the inner body, and unlike the conventionally used distributed anchor inner body, the hollow body 26 is further provided at the central portion of the inner body 20 in the longitudinal direction, and the injection pipe 5 is inserted therein, Un-bonded steel wire (4) can be installed in an odd number of strands, it is characterized by reducing the weight than conventional load-bearing body.

Fig. 11 is a detailed perspective view of the packaging spacer, which has holes 12 and 13 for inserting the unbonded steel wire 4 and the injection pipe 5, and is made of an elastic material and can be packaged. Maintain a constant distance between the bonded steel wire (4) and the steel wire, the anchor body is located in the center of the perforation hole (1), the pack 15 to the steel band 35 when installing the pack 15 on the outer peripheral surface of the tension member It is provided with a concave-convex portion 11 to be fixed to prevent movement in the longitudinal direction.

Fig. 12 is a detailed perspective view of the injection pipe, in which a repetitive radial injection hole 6 is formed on the wall of the fixing pipe 3 and the injection pipe 5 at regular intervals in the longitudinal direction of the pipe, and the front end thereof has a closed portion 7 for perforation. The hole 1 is characterized in that it is injected only in the right direction.

Compression-type pack anchor method according to the present invention, it is necessary to form the anchorage inflating the pack by pressure injection in the soft ground, sand gravel layer, landfill layer, gravel gypsum layer and crushed large layer difficult or impossible existing compression anchor construction It is possible to secure tensile force and economical because there is no loss of injection material.

Claims (6)

The grout injection device includes: an unbonded steel wire installed in the lengthwise direction of drilling; An injection pipe installed in the same direction as the un-bonded steel wire and having a plurality of injection holes formed in a radial direction at a predetermined interval in the fixing unit length direction, and the end of which is closed; Spacers are installed in the un-bonded steel wire and the injection pipe at regular intervals to maintain the gap between the un-bonded steel wire and the steel wire, and the packaging material is made of an elastic material, the spacer having an uneven portion on the outer peripheral surface; A tip anchor head having a steel wedge for fixing one end of the unbonded steel wire; A load-bearing body installed in the longitudinal direction of the anchor body for fixing the tip anchor head and transmitting the tensile force when the unbonded steel wire is tensioned; A pack fixed to the outer circumferential surface of the spacer by a steel band surrounding an anchor anchor; Compression-type pack anchor device, characterized in that the tip cap is installed on the end of the pack to wrap the end of the anchor body, to prevent the pack from tearing. The injection pipe of claim 1, wherein the injection pipe is repeatedly radially formed at regular intervals in the longitudinal direction of the pipe in the anchorage part wall to be injected in the direction perpendicular to the drilling hole. The injection pipe is provided, and the tip is closed. Compressed pack anchor device. The method of claim 1, wherein the spacer member comprises a plurality of un-bonded steel wire holes and injection pipe holes made of a resilient material; When the pack is installed on the outer peripheral surface of the spacer member, characterized in that the compression pack anchor device comprising a concave-convex portion to prevent the longitudinal movement by fixing the pack with a steel band. The tip cap of claim 1, further comprising: a small connecting rod having a thread at one end thereof so as to be connected to the thread of the bearing body of the inner body; A large connecting rod installed at the end of the small connecting rod and having an uneven portion to bundle the pack with a steel band; Compression-type pack anchor device, characterized in that consisting of a tip cap for fixing the pack to the large connecting rod with a steel band and installed by applying a force. According to claim 1, wherein the load bearing body, a tension member hole is formed in the acupressure plate with a thread in a symmetrical structure, the tension member guide grooves are formed at both ends of the uneven body; In the center of the two acupressure plate and the concave-convex body, one more hollow groove with a thread is formed at the top end to install an injection pipe (FIGS. 2 and 4), or when the tension member is odd, a strand of tension member is inserted into the hollow hole. Compression-type pack anchor device, characterized in that the weight can be transmitted so as not to be unbalanced to the lower body when installed (Fig. 5) by tension. 2. The pack of claim 1, wherein the pack comprises: two or more layers of specially engineered cylindrical geotextiles or conventional woven fabrics of high friction; The compressive pack anchor device, characterized in that the use of the fiber has a high tensile strength and a permeable hole that can be discharged only the mixed water when injecting the injection material.