KR101918930B1 - Front compression backward tension type removable U-turn anchor structure and Removable U-turn anchoring method using the same - Google Patents

Abstract

The present invention relates to a removal type U-turn anchor structure and a removal type U-turn anchoring method that greatly improves the reliability of construction and tensile line removal rate in response to the characteristics of soft ground.
The present invention relates to a removal type U-turn anchor structure to be inserted into a ground hole in order to reinforce soft ground, A compression undergarment comprising: a compression inner lower body formed with guide grooves through which the tension lines pass on both side surfaces facing each other in opposite directions; A linear member comprising: two to six tensile resistors coupled to the rear of the compression undergarment; And a U-turn induction member directly coupled to the rear of the inner lower body or coupled between the tensile resistor at an upper end of the tensile resistor; Wherein the tension line is covered with a covering hose in a perforation hole section and passes through a guide groove on one side surface of the compression inner body to wind the U-turn guide member, And a pair is provided so as to move up and down. &Quot;

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor structure for a U-turn type anchor structure,

The present invention relates to a removal type U-turn anchor structure and a removal type U-turn anchor construction method that greatly improves the reliability of construction and tensile line removal rate in accordance with the characteristics of the ground.

Anchor construction is carried out for the construction of an underground structure, a tomb wall to prevent settlement around excavation grounds, and a soft ground reinforcement. The anchor construction is performed by using a punching machine to perforate the ground at a predetermined depth and inclination angle, inserting the inner bottom body having the tensile wire of a predetermined length into the perforation hole, and grouting the perforation hole to fix the inner bottom body to the ground. Thereafter, when the tensile wire coupled to the inner lower body or pulling around the inner body is pulled and fixed, the tensile force is supported by the tensile wall or the soft ground is reinforced (in the perforated hole section, the tensile wire is coated on the covered hose. ).

Such an anchor system is largely classified into a non-anchor anchor system in which tensile wires are buried in the ground, and a tensile-line anchor system that removes tensile wires after construction. In the case of the above-mentioned non-treated anchor system, there are many cases where the removal anchor system is required to be applied because of infringement of property rights between adjacent land and building owners and contamination of buried tensile wire due to soil contamination.

The removal anchor system is most representative of a U-turn anchor system or a straight removal anchor system.

The U-turn anchor system is installed such that the tensile wire is wound around the inner bottom body disposed at the lower end of the perforation hole. When the utility of the anchor is completed, the end of the tensile wire is pulled out of the ground perforation hole The tensile line can be removed from the ground.

However, since there is a certain distance between the perforation hole and the inner bottom body, the lower inner body is inserted into the perforation hole, the grouting material is injected and cured, and then the tension line is pulled and fixed. The lower inner body may be distorted as described above. In particular, in the case of soft ground, such a problem is further exacerbated. This is because the force is applied in such a way that the lower body is pushed up from the bottom when the tensile wire is pulled in a U-turn state by hanging on the lower body, and the rear wheel drive vehicle is vulnerable to the ice path.

[Reference Figure 1]

When the inner lower body is distorted while grouting is performed, it is hard to know it outside the ground. When the inner lower body is crooked, it is difficult not only to remove the tension line later but also to lower the reinforcement effect.

The straight removal anchor system has been developed as an alternative to the above-described U-turn anchor system, which combines one tensile wire at the tip of the inner lower body and releases the tensile wire within the tip during pulling operation, So that the tensile wire can be removed. Therefore, the straight anchor removal system has been focused on the development of the internal structure of the tip that can be changed into a state of releasing the tension line while restraining the tension line when attempting to remove the tensile line.

However, such a straight removal anchor system also has a problem that, in the soft ground, the tensile wire is not able to be removed due to the bowing of the free standing ground. Specifically, a straight-type removal anchor system is divided into two types: a pulling-out method of pulling the tension line, a method of pulling out the joint structure of the front end portion by hitting the tensile line from outside the ground, As shown in the figure, when the tensile wire is bent due to the breakage of the grout body according to the behavior of the free standing ground, such a tensile wire can not be rotated and disassembled and the tip joint structure can not be disassembled by striking the tensile wire.

[Reference Figure 2]

As described above, in the soft ground, the U-turn anchor system is a problem of settlement length, and the straight removal anchor system has a low removal rate of tensile line due to the problem of free length.

Since the problem of free length is a problem of the ground, it is difficult to improve the anchor structure to cope with the problem. However, since the problem of the anchor structure is a problem of the anchor structure, there is a lot of room for improvement. Accordingly, the inventor of the present invention has attempted to solve the problem of the removal anchor which can be applied to the soft ground through the improvement of the conventional U-turn anchor system.

1. Registration Practical New Model 20-0446189 "Removable Type U Pack Anchor" 2. Patent Literature 10-2011-0106642 "Inner Lower Body for Removable U-Turn Anchor" 3. Patent No. 10-1176577 "Removable expansion pack anchor device"

An object of the present invention is to provide an anchor structure and a method for improving the reliability of the construction and the removal rate of the tensile wire. The object of the present invention is to greatly increase the removal rate of the tensile wire when applied to soft ground.

The present invention relates to a removal type U-turn anchor structure to be inserted into a ground hole in order to reinforce a ground, A compression undergarment comprising: a compression inner lower body formed with guide grooves through which the tension lines pass on both side surfaces facing each other in opposite directions; A linear member comprising: two to six tensile resistors coupled to the rear of the compression undergarment; And a U-turn induction member directly coupled to the rear of the inner lower body or coupled between the tensile resistor at an upper end of the tensile resistor; Wherein the tension line is covered with a covering hose in a perforation hole section and passes through a guide groove on one side surface of the compression inner body to wind the U-turn guide member, And a pair is provided so as to move up and down. &Quot;

The compression undergarment may have a rectangular shape, and the guide groove may be formed on a side surface of the short side, and a groove or a through hole may be formed in the compression undergarment. The tensile resistant member is a deformed reinforcing bar curved into a U-shape, and can be coupled to the rear portion of the compression undergarment so that a pair of the reinforcing bars are spaced apart so that the bent portion is downward.

Further, the present invention provides a removal type U-turn anchor method for ground reinforcement, comprising the steps of: (a) forming a perforation hole in the upper surface of a reinforcing bar; (b) inserting an intaglio removal type U-turn anchor structure of a forward compression type according to any one of claims 1 to 4 into the perforation hole; (c) injecting and filling a grouting material into the perforation hole; And (d) pulling and pulling the tensile line after curing the grouting material; Quot; U-turn anchoring method "

The step (b) may be inserted into the perforation hole in a state where the anchorage portion of the long-term removal type U-tail anchor structure, which is the forward compression backward, is inserted into the pressurizing pack. In the step (c), grouting material is injected into the pressurized pack to form a bulb in the ground, and a step of injecting and filling a grouting material into the free end of the perforation hole is performed separately. In the step (d) After the grouting material cures in the pressurized pack, the tension line is pulled and fixed.

According to the present invention, after the curing of the anchor grouting material, the U-turn guide member can be pulled past one side of the compression bottom inner body to increase the removal rate of the tensile line drawn out through the other side of the compression bottom inner body.

The tensile wire is removed from the ground by pushing the tensile wire from one side and pulling it from one side. In the longitudinally-released U-turn anchor structure provided by the present invention, the U-turn guide member, in which the tensile wire is wound, Since it is directly coupled to the rear of the inner lower body or is coupled between the above tensile resistors at the upper end of the tensile resistor, it is possible to push the U-turn anchor structure from behind as usual when pulling and pulling together the pull- But the force that draws it from the front acts.

Accordingly, since the U-turn anchor structure is not distorted in the ground, reliability of the construction state as the anchor structure is improved, and the tensile removal work can be smoothly performed.

1 is a perspective view of one embodiment of an elongated removal-type U-turn anchor structure that is a forward-compression-backward provided by the present invention.
[Fig. 2] is a perspective view of one embodiment of a compression bottom body applied to the present invention.
[Fig. 3] is a perspective view of a direct / indirect coupling structure between a U-turn conductor, a tensile resistor and a tensile wire of the present invention.
FIG. 4 is a view showing steps of an intaglio type U-turn anchor method that is a forward compression type.
FIG. 5 illustrates steps (b) and (c) of the intaglio removal type U-turn anchor method which is a forward compression rear using a pressurized pack.
6 is a perspective view of another embodiment of a long-term removal type U-tail anchor structure that is a forward compression rear provided by the present invention.

The present invention relates to a removal type U-turn anchor structure to be inserted into a ground hole in order to reinforce a ground, A compression undergarment comprising: a compression inner lower body formed with guide grooves through which the tension lines pass on both side surfaces facing each other in opposite directions; A linear member comprising: two to six tensile resistors coupled to the rear of the compression undergarment; And a U-turn induction member directly coupled to the rear of the inner lower body or coupled between the tensile resistor at an upper end of the tensile resistor; Wherein the tension line is covered with a covering hose in a perforation hole section and passes through a guide groove on one side surface of the compression inner body to wind the U-turn guide member, And a pair is provided so as to move up and down. &Quot;

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment of an intaglio removal type U-tail anchor structure 100 which is a forward compression rear provided by the present invention. The anchor structure of the present invention is provided with a compression lower body 110 and a tension resistor 130 together.

The compressive lower body 120 is a member having a compressive resistance surface 121 at the front side and a conductive force of the earth retaining wall or a shear force acting on the ground (hereinafter referred to as an 'external force') is applied to the compression resistant surface 121 And the compressive resistance of the lower compression body 120 prevents conduction of the earth retaining wall or the ground collapse.

The tensile resistor 130 is a linear member (deformed reinforcing bar) coupled to the compression inner lower body 120 and is opposed to an external force by a frictional force (pulling resistance force) between the tensile resistance body 120 and the grouting material .

However, in the present invention, the compression under-body 120 is disposed forward (in the direction of the perforation hole entrance) and the tensile resistance body 130 is disposed rearward (in the direction of the bottom of the perforation hole) The compressive lower body 120 functions as a main resistance body against external force and the tensile resistance body 130 is compressed by the compressive lower body 120, So that it acts as an auxiliary resistance body which receives external force via the compression-inside lower body 120.

In the present invention, the tensile resistor 130 is coupled to the compression inner bottom body 120 to form a long inner bottom body as a whole. Unlike the conventional U-turn anchor structure, in which the tensile wire has been lifted up to a rear portion of a long inner bottom body, the present invention is characterized in that the tensile wire 110 is entirely made of a long inner bottom body A greater technical significance can be found in imparting a morphological characteristic that an external force is transmitted in a pulling manner.

Therefore, the U-turn inducing member 140 described below is not limited to the number (number of strands) and the length of the tensile resistors to be bonded to the rear portion of the compression bottom body 120, It is preferable to couple them in a balance of force within a range of 2 to 6 considering the diameter of the ground hole, the shape and size of the compression bottom body, and the like.

The U-turn inducing member 140 is a component for allowing the tensile wire 110 to transmit an external force in a manner of pulling a front end portion of a long inner bottom body (a combined body of a compression bottom body and a tensile resistor). Therefore, the U-turn guide member 140 may be directly coupled to the rear portion of the compression under-body 120, and may be coupled between the tension resistors 130 as shown in FIG. 1, (130). ≪ / RTI >

Since the guide grooves 122 are formed in the compression bottom inner body 120 to pass the tension lines coated on both sides facing each other in opposite directions as shown in FIG. 2, the coated tension lines 110 And then the U-turn guide member 140 is wound around the one side guide groove 122 of the compressed inner lower body 120 and then the other side guide groove 122 of the compressed inner lower body 120 is retracted And is drawn out of the perforation hole. Therefore, the lower portion of the U-turn guide member 140 may be formed as a curved surface along the trajectory of the tension line, and may be a horseshoe-shaped (U-shaped) as shown in FIG. 3 . In addition, a guide groove may be formed in the lower portion of the type guide member 140 along the path of the coated tensile line.

2, the guide grooves 122 are formed in the side surfaces of the short sides of the compression undergarment 120, so that the coated tensile lines are guided in the guide grooves 120 on both sides of the short sides. As shown in FIG.

The grooved passage 123 may be formed in the compressed inner lower body 120 in the form of a groove or a through hole. The grouting furnace 123 is a path through which the grouting pipe passes, and FIG. 2 shows an embodiment in which the grooves are formed in the side surface of the long side of the rectangular compression undergarment.

As shown in FIGS. 1 and 3, the tension resistor 130 couples a pair of deformed reinforcing bars curved in a U-shape to the rear of the compression bottom inner body 120 so that the bent portion is downward It can be directed to the bottom of the hole. In this case, the tensile resistor 130 is actually four strands.

When a plurality of linearly elongated tensile resistors are coupled to the rear of the compression undergarment, it is difficult to keep the interval between the tensile resistors constant without a separate spacer. However, as described above, since the U-shaped tensile resistor is bonded at the both ends to the rear of the compressed inner bottom, the spacing between both curved tensile resistors is maintained as long as the U-shaped shape is maintained. In addition, since the U-shaped tensile resistor is fixed at two points, the interval between the pair of tensile resistors is maintained without a spacer.

In addition, the U-turn inducing member 140 can be made to function as a spacer by coupling the U-turn inducing member 140 between the tension resistors 130.

The tensile wire 110 should be covered with the covering hose 115 as a whole in the perforation hole section. The covering hose 115 prevents the grouting material from directly touching the tension line 110 so as to prevent the removal of the tension line 110 later.

Meanwhile, as shown in FIG. 6, the upper end 131 of the tensile resistant body may be fixed by welding or the like in a state in which the upper end portion 131 protrudes upward through the compressed inner lower body 120. The compressive resistance of the lower compression body 120 and the frictional force of the upper end of the tension resistor 131 may correspond to an external force.

The present invention also provides a removal type U-turn anchoring method for reinforcing a soft ground using the above-described long-term removal type U-turn anchor structure 100, which is a forward compression type rearward. The present invention can be applied to a method of directly grouting a perforation hole, A U-turn anchor structure may be inserted into a pressurizing pack and a grout material may be injected into the pressurized pack 200 to form a bulb in an anchorage fixture.

As shown in FIG. 4, (a) a step of forming a perforation hole in the upper surface of the reinforcing bar (refer to FIG. 4 (a)), a method of directly grouting the perforation hole in the removal type U-tail anchoring method; (b) inserting the intaglio removal type U-turn anchor structure 100 which is the forward compression back into the perforation hole (refer to FIG. 4 (b)); (c) pouring and filling a grouting material into the perforation hole (refer to FIG. 4 (c)), and (d) pulling and fixing the tension line after curing the grouting material (See (d) of FIG.

As shown in FIG. 5, in the method of forming the bulb in the anchor fixing portion of the removal type U-tail anchoring method, in the step (b), a fixing point of the intaglio removal U-turn anchor structure 100 A step of forming a bulb in the ground by injecting a grouting material into the press pack 200 in step (c) after inserting the part (inner body part) into the perforation hole with the press pack 200 inserted; And the grouting material is injected into the free length portion of the perforation hole. In step (d), the tension line 110 is pulled and fixed after the grouting material cures in the pressurized pack.

The present invention has been described in detail with reference to the preferred embodiments. However, it should be understood that the present invention is not limited to the above-described embodiment, but may be modified and changed without departing from the gist of the present invention. The claims of the present invention thus include such modifications and variations.

100: Longitudinally removing U-turn anchor structure which is forward compression
110: tensile wire 115: coated hose
120: compression under body 121: compression resistant surface 122: guide groove
123: grouting 130: tensile resistor 140:
200: Pressure Pack

Claims (6)

A removal type U-turn anchor structure to be inserted into the ground perforation hole for reinforcing the ground,
Tension line;
A compression undergarment comprising: a compression inner lower body formed with guide grooves through which the tension lines pass on both side surfaces facing each other in opposite directions;
A linear member comprising: two to six tensile resistors coupled to the rear of the compression undergarment; And
A U-turn induction member coupled directly to the rear of the compression undergarment or coupled between the tensile resistance member at the upper end of the tensile resistor; And,
The tension line is covered with a covering hose in a perforation hole section and passes through a guide groove on one side of the compression bottom body to wind the U-turn guide member around the guide groove on the other side of the compression bottom body. Wherein the front and rear compression anchor structure is a forward compression rear structure.
The method of claim 1,
Wherein the compression inferior body is a rectangular shape and the guide groove is formed on the short side surface.
The method of claim 1,
Wherein the tensile resistant member is a deformed reinforcing bar curved in a U shape and provided with a pair of spaced apart portions so that the curved portion is downward.
The method of claim 1,
Wherein the grooved groove in the form of a groove or a through hole is formed in the compressed inner bottom body.
As a removal type U-turn anchor method for ground reinforcement,
(a) forming a perforation hole in the upper surface of the reinforcing bar;
(b) inserting an intaglio removal type U-turn anchor structure of a forward compression type according to any one of claims 1 to 4 into the perforation hole;
(c) injecting and filling a grouting material into the perforation hole; And
(d) pulling and pulling the tensile line after curing the grouting material; Wherein the method comprises the steps of:
The method of claim 5,
Wherein the step (b) includes inserting a fixing length portion of the long retractable U-tail anchor structure, which is the forward compression posterior portion, into the perforation hole with the pressurizing pack inserted,
Wherein the step (c) includes the steps of forming a bulb in the ground by injecting a grouting material into the pressurizing pack, and injecting and filling a grouting material into a free portion of the hole,
Wherein the step (d) comprises pulling the tensile wire after the grouting material cures in the pressurizing pack to fix the wire.

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