KR101030341B1 - Bidirectional extended ground reinforcement device and its construction method - Google Patents

Abstract

PURPOSE: A bidirectional extendable ground reinforcing device and a construction method thereof are provided to perform tension work with less power by successively expanding two fixing wings. CONSTITUTION: A bidirectional extendable ground reinforcing device comprises first and second fixing wings(10,20), tensile members(30,40), an expansion guide(50), and a packer(60). The first and second fixing wings are settled on ground. The tensile member respectively extends first and second fixing wing. The expansion guide directly or indirectly supports first and second fixing wing. The packer supports the expansion guide with an anchor hole(1).

Description

Bidirectional extended ground reinforcement device and its construction method {GROUND REINFORCING APPARATUS TO BE EXPANDED BIDIRECTIONALLY AND CONSTRUCTING METHOD THEREOF}

The present invention relates to a ground reinforcement device, and more particularly to a bidirectional extended ground reinforcement device that can be fixed to the ground due to the tension of the tension member, and can be firmly fixed to the fixing wing using a small force.

In general, anchors and nailing are used to prevent the collapse of the incision surface in the incision site, slope stability, to prevent injury by groundwater of large structures such as buildings or dams, and to prevent the collapse of excavated walls during the underground construction of large buildings. In addition, it is installed in order to prevent the movement or distortion of the construction during the construction of buildings and large steel towers, such as earthquakes.

The anchor method drills the anchor hole in the ground where there is a risk of collapse, using a boring machine, grout hose, a plurality of tension members and a load bearing body are inserted into this hole, and then inserted through a grout hose. When the grout is injected and the injected grout is cured together with the lower body, the fastener is fastened to the other end of the tension member and the tension member in the strand is tensioned using hydraulic equipment to stabilize the target structure.

Such anchors support the tensile force from the surface by the ground pressure of the grouting or frictional forces with the ground.

In this anchor construction, the components of the slope-reinforced wedge-type anchors of roads and complexes are anchors that exert the required stresses, free parts that transmit stresses exerted in the anchorages, and fixtures that act on the structures. Are distinguished. Among these components, the anchoring part is determined by the adhesion resistance of the ground, cement grout, cement grout and tension member. The free part used in the anchoring method may be made of, for example, a tension member coated with a wire rope in which a plurality of steel wires are twisted.

However, the anchor according to the prior art has the following problems.

The anchor according to the prior art is to give the stiffness to the pull out by the bearing pressure of the grout, there are a number of joints around the anchor hole in which the anchor is inserted according to the state of the ground. Therefore, since the grout is filled by the injection pressure, when injected into the anchor hole, the grout leaks from the anchor hole through jointing, thereby lowering the filling rate inside the anchor hole, thereby failing to substantially reinforce the ground. At this time, even if the joint is formed only in a part, since the entire area inside the anchor hole is one space, voids are generated in the grout filled in the entire area of the anchor hole, thereby preventing reinforcement. Here, since there is no way to measure the strength inside the anchor hole, the construction proceeds without recognizing the presence of voids, and eventually a large accident due to ground collapse may occur.

In addition, since the outer circumferential surface of the anchor is generally a flat surface, a separation phenomenon occurs between the grout and the anchor, so that the anchor is drawn from the anchor hole when the tension member is tensioned, and the ground is collapsed as a result.

In order to solve this drawback, the slope-reinforced wedge-type anchors of roads and complexes in which a plurality of wedge wings are wedge-shaped into the ground to exert a support force have been proposed.

However, in the anchor according to the prior art, since one end of the wedge wings is fixed to the anchor and the free end rotates, the free end of the wedge wings is flipped or broken when being pulled out.

In order to solve this problem, anchors with an extended wedge wing or fixing wings have been proposed.

Conventional extension anchors are fixed by the extension movement of the wings when the tension of the tension or rotation of the nail rod, because the separate fixing head is configured to expand and move the two wings at the same time, the city park is expensive due to the increase in material, in one operation There is a problem in that a tension force of a large force is required because two wings must be expanded.

In addition, conventional so-called anchors, ground reinforcement devices called nailing is different in the field of application, in particular, the ground (for example, 20 tons of anchor, 10 tons of nailing is not applied to the anchor and nailing) When the force is applied to the ground (force is applied between 10 to 20 tons) can not be reinforced or there is a problem that the efficiency is low.

The present invention is to solve the problems as described above, by directly connecting the two fixing blades with the tension member to move the fixing blades directly without using a separate material, the two fixing blades by each tension operation It is an object of the present invention to provide a bidirectional expandable ground reinforcement device and a construction method which can be sequentially expanded to work with low force.

Bidirectional extended ground reinforcement device according to the present invention for achieving the object as described above, the packer is inserted into the anchor hole in the ground and tightly supported by the anchor hole through the filling material filled therein; An expansion guide installed inside the packer and supported by the packer; A first fixing wing installed at the front of the extension guide and extending along the extension guide by tension of the first tension member and fixed to the ground around the anchor hole; It is installed in front of the first fixing blade and is characterized in that it comprises a second fixing blade which is extended along the first fixing blade by the tension of the second tensile material and is fixed to the ground opposite the first fixing blade.

According to the bidirectional extended ground reinforcement device and the construction method of the present invention, the first and second anchoring blades are directly connected to the first and second tension members, so that the first and second anchoring wings are different from each other when the first and second anchoring members are tensioned. As they are moved directly and without assistance, the material is reduced, thereby reducing manufacturing and park costs.

In addition, since the first and second fixing wings are sequentially operated through the respective tensioning operations, less force is required than when the two are simultaneously tensioned, the first and second fixing wings can be tensioned with only a small tensioner, thereby reducing the construction cost.

In addition, when the second fixing wing is fixed after the first fixing wing is fixed, the first fixing wing may be further extended and moved by the second fixing wing, and thus, the fixing force of the first and second fixing blades is maximized. The reliability as a reinforcement apparatus can be improved, and the ground can be reinforced stably.

The ground reinforcement device according to the present invention can be used in the same manner as the conventional anchor and nailing, as well as can be used for the ground that can not be used to anchor and nailing, there is a great advantage in the utility.

1 is an exploded perspective view of a bidirectional extended ground reinforcement device according to the present invention.
Figure 2 is a cross-sectional view of the installation state of the bidirectional expandable ground reinforcement device according to the present invention.
3 and 4 is an operational state diagram of the bidirectional expandable ground reinforcement device according to the present invention,
3 is a state in which the first fixing wing is fixed,
4 is a state in which the second fixing blade is fixed.

1 and 2, the bidirectional extended ground reinforcement device according to the present invention, the first and second anchoring wings (10, 20), the first and second anchoring wings (10, 20) fixed to the ground, respectively, Expansion guide (50) for directly or indirectly supporting the tension member (30, 40), the first and second fixing blades (10, 20), the packer (60) of supporting the expansion guide (50) in the anchor hole (1) It consists of an assembly.

The first fixing blade 10 is fixed by expansion in conjunction with the expansion guide 50 and the second fixing blade 20 is interlocked with the first fixing blade 10 after the fixing of the first fixing blade 10. It is expanded and settled secondarily, and it embodies through the following description.

The packer 60 is a hollow seal, and the filler is filled therein so that the packer 60 is tightly fixed to the wall surface of the anchor hole 1 so that the expansion guide 50 is rearward when the first and second tension members 30 and 40 are tensioned. Do not push to the ground level.

The packer 60 is provided with first and second tensile material through-holes 61 and 62 through which the first and second tensile materials 30 and 40 can be tensioned. The first and second tensile material through-holes 61 and 62 may be circular in the same diameter as a whole, and the movement of the first and second tensile material 30 and 40 and the first and second fixing wings 10 and 20 may be considered. When the diameter toward the long hole to the expansion guide 50 may be larger in the form of a long hole. The reason for this is explained in detail in the following construction method.

Packer 60 that performs this function is a generic term for all products that expand by the filling of the filler, the filler also refers to all that can expand the packer 60, such as cement milk.

The expansion guide 50 directly guides and expands the first fixing blade 10 and indirectly supports the second fixing blade 20 through the first fixing blade 10, for example, the first fixing blade 10. The first inclined portion 51 is formed on the front surface of the cylindrical body having at least one hole through which the two tensile members 30 and 40 pass. The first inclined portion 51 is in contact with the second inclined portion 11 described later of the first fixing blade 10.

For example, the first fixing blade 10 has a circular cross section and the first tension member 30 is fixed, and second and third inclined portions 11 and 12 are formed on the rear and front surfaces, respectively. The second inclined portion 11 is in contact with the first inclined portion 51 of the expansion guide 50 and the third inclined portion 12 is in contact with the fourth inclined portion 21 described later of the second fixing blade 20. .

For example, the second fixing blade 20 has a circular cross section, and the second inclined member 40 is fixed, and the fourth inclined portion 21 contacting the third inclined portion 12 of the first fixing blade 10 is formed at the rear surface thereof. Is formed.

Although the outer circumferential surfaces of the first and second anchoring blades 10 and 20 are shown to be flat in the drawing, the outer circumferential surfaces of the first and second anchoring blades 10 and 20 may have irregularities having one or more protrusions in order to increase anchorage force to the ground. It may be a structure.

Inclined portions (first and second inclined portions 51 and 11 and third and fourth inclined portions 12 and 21) which are in contact with each other among the inclined portions of the first and second fixing wings 10 and 20 and the extension guide 50. The torsion preventing projections and grooves may be configured so that rotation does not occur when the first and second fixing blades 10 and 20 are expanded.

The materials of the first and second fixing blades 10 and 20 and the expansion guide 50 are not specifically mentioned, and any material that is not corroded and corroded in the ground and is not damaged by external force is possible.

Bidirectional extended ground reinforcement device 100 of the present invention is installed as an assembly, the first and second fixing blades (10, 20) and the guide 50 may be installed by tying with a string or the like so as not to be separated from each other. Of course, the strap is made of a material or structure that is cut when the first and second fixing wings 10 and 20 are extended.

Reference numeral 70 is a hydraulic plate supported on the ground, 80 is a pressure plate installed on the hydraulic plate 70 and the first and second tension members 30 and 40 are fixed, the hydraulic plate 70 is a plurality of plate-shaped blocks projections and grooves It can be made by fitting by fitting.

Bidirectional extended ground reinforcement device construction method according to the present invention is as follows.

(S10) anchor hole formation.

To install the anchor 100 of the present invention for slope reinforcement, and to form the anchor hole (1) in the ground for the installation of the anchor (100). Since the formation of the anchor hole 1 is well known, a detailed description thereof will be omitted.

(S20) Installation of bidirectional expandable ground reinforcement.

After inserting the bidirectional expandable ground reinforcement device 100 of the present invention into the anchor hole (1), install the hydraulic plate 70 and the pressure plate 80, the first and second tension members (30, 40) to the tensioner, respectively Connect.

(S30) Packer Inflate.

As a preliminary work for fixing the first and second fixing wings 10 and 20, the filler is filled in the packer 60 so that the guide 50 is not pushed backward when the first and second tension members 30 and 40 are tensioned. do.

Before the filler is filled, the packer 60 does not cause interference when the packer 60 is inserted into the anchor hole 1 as a contracted state, and the packer 60 expands when the filler is filled through an injection tube connected to the packer 60. The filling of the filler may be confirmed by flowing the filler back through the injection tube. The packer 60 is fixed to the anchor hole 1 by being in close contact with the ground of the periphery of the anchor hole 1 so that the guide 50 is supported without being pushed to the ground side.

(S40) 1st settlement.

The first fixing blade 10 and the second fixing blade 20 are sequentially fixed with a time difference. First, the first fixing blade 10 is fixed in the following manner.

When the first tensile member 30 is tensioned from the ground, the first fixing blade 10 fixed to the first tensile member 30 guides the extension guide 50 (inclination of the first and second inclined portions 51 and 11). It receives and moves outwards to expand and settle on the ground.

As the first fixing blade 10 is expanded by the tension of the first tension member 30, bending may occur in the first tension member 30, and the first tension member through-hole 61 of the packer 60 is long. Or because of the expansion type, large bending does not occur in the first tensile member 30. When the first fixing blade 10 and the expansion guide 50 are tied with a string, the string is broken by the expansion of the first fixing blade 10 so as not to restrict the expansion of the first fixing blade 10.

(S50) Secondary settlement.

According to the primary fixing step, the first fixing blade 10 is fixed to the ground, and the second fixing blade 20 is maintained in an installed state. That is, the second fixing blade 20 is in a state spaced apart from the first fixing blade 10.

When the second tension member 40 is tensioned to fix the second anchoring blade 20, as shown in FIG. 4, the second anchoring blade 20 fixed to the second tension member 40 moves to the ground. 2 From the moment when the fourth inclined portion 21 of the settling wing 20 meets the third inclined portion 12 of the first settling wing 10, the second settling wing 20 is formed of the first settling wing 10. Under the guidance of the third inclined portion 12 is expanded and settled on the ground.

Since the first fixing blade 10 is settled on the ground, the second fixing blade 20 expands and moves based on the support base of the first fixing blade 10. Meanwhile, when the second fixing blade 20 is extended, the first fixing blade 10 may also be extended. When the second fixing blade 20 is expanded, even if the first fixing blade 10 expands, there is a problem in the fixing force. In addition, since the expansion movement of the second fixing blade 20 is also increased by the additional fixing of the first fixing blade 10, the overall fixing force can be increased.

As the first and second anchoring blades 10 and 20 extend and move by separate tensioning operations, the first and second anchoring blades 10 and 20 may be tensioned with less force than when the first and second anchoring blades 10 and 20 are tensioned together.

(S60) Grouting.

If grouting is required, grout the anchor hole 1 by injecting a grout material into the anchor hole 1.

The bidirectional extended ground reinforcement device 100 according to the present invention constructed as described above has the first and second anchoring wings 10 and 20 when an external force is generated to move the first and second anchoring wings 10 and 20 to the ground side after installation. ) Is expanded through the expansion guide 50 or the first fixing blade 10 so that the fixing force becomes larger and larger and does not leave the anchor hole (1).

10,20: 1st, 2nd fixed wing,
11,12,21,51: inclined portion,
30,40: First and second tensile material,
50: expansion guide,
60: packer

Claims (4)

A packer 60 inserted into the anchor hole in the ground and tightly supported by the anchor hole through a filler filled therein;
An expansion guide 50 installed inside the packer and supported by the packer;
A first fixing blade 10 installed at the front of the extension guide and extending along the extension guide by tension of the first tension member 30 and fixed to the ground around the anchor hole;
Including the second fixing blade 20 which is installed in front of the first fixing blade and is extended along the first fixing blade by the tension of the second tensile material 40 and is fixed to the ground opposite to the first fixing blade 40 Bidirectional extended ground reinforcement device, characterized in that configured.
The method of claim 1, wherein the expansion guide has a first inclined portion 51 is formed on the front surface, the fourth inclined portion 21 is formed on the rear of the second fixing blade, the rear and front of the first fixing blade The second and third inclined portions 11 and 12 respectively corresponding to the first and fourth slope portions are formed, whereby the first fixing wing through the first and second slope portions when the first tensile material is tensioned. Is expanded, and the second anchoring wings are expanded through the third and fourth inclined portions when the second tension member is tensioned.
The packer of claim 2, wherein the packer includes first and second tensile material through holes 61 and 62 through which the first and second tensile material penetrates, and the first and second tensile material through holes extend toward the expansion guide. Bidirectional extended ground reinforcement device, characterized in that. A first step of forming an anchor hole in the ground;
A second step of inserting the bidirectional expandable ground reinforcement device of claim 1 or 2 into the anchor hole formed by the first step;
A third step of expanding the packer of the bidirectional extended ground reinforcement device installed through the second step to fix the expansion guide;
A fourth step of tensioning the first tensile material of the bidirectional expandable ground reinforcement device after the third step so that the first anchoring blade is expanded through the extension guide and first settled;
And a fifth step of tensioning the second tensile material of the bidirectional expandable ground reinforcing device after the fourth step so that the second anchoring blade is expanded through the first anchoring wing to fix the second anchoring material. Construction method of reinforcement device.

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