KR102329997B1 - Fixing head of removal anchor and construction method using the same - Google Patents

Abstract

The present invention relates to a structure of a fixing head of a removable anchor body. By rotating a steel wire while pressing the same through the relationship of the components provided inside the fixing head, the locked state and the unlocked state of the steel wire are alternately changed, and the steel wire is rotated in the opposite direction after making the steel wire in a locked state to separate the steel wire part from the part maintaining the locked state. Accordingly, even when an impact or rotation is applied to the steel wire during the subsequent construction process, the steel wire is maintained in a strong and stable locking state in which the steel wire is not separated. The fixed head of a removable anchor includes a body part; a lock guide member; a guide block; a seating groove; first and second threads; and a polygon fastener.

Description

FIXING HEAD OF REMOVAL ANCHOR AND CONSTRUCTION METHOD USING THE SAME

The present invention relates to a fixing head of a removable anchor and a construction method using the same, and more particularly, to facilitate the installation of the anchor and the removal of the steel wire, and to prevent the steel wire from being separated in an unintended situation. It relates to a removable anchor with high stability for fastening and separation, and a construction method thereof.

In general, the anchor body for ground reinforcement consists of a steel wire that is inserted into the ground to combine the disturbed ground, a grout that solidifies the ground and the steel wire, and a load-bearing body that transmits the tension force introduced to the steel wire to the ground. In brief, after drilling the ground, the anchor body including the steel wire is inserted, the end of the steel wire is fixed by grouting the ground and the steel wire, and then the steel wire is pulled with a hydraulic cylinder for prestressing and fixed to the ground. It is a construction method that promotes ground stability by introducing tension.

On the other hand, anchors are divided into permanent anchors and removable anchors depending on the purpose.

Removable anchors are used for temporary construction and are removed from the ground after achieving their purpose. Since it causes many problems such as disputes due to intrusion of the adjacent land during construction of buildings in the city, and acts as an obstacle during underground construction of the site where the anchor is installed, it should be removed in the future.

According to the removal method, there were various methods such as the method of removing the anchor with a screw, the method of removing the anchor with gunpowder, and the method of removing the anchor by inserting a removal tension member according to the removal method. Among these prior art methods, the method of destroying the grouting agent with gunpowder and removing the anchor is concerned about civil complaints due to the vibration of the ground caused by the explosion of the gunpowder, and it is difficult to expect the certainty of construction. In addition, since the tension member for removal must be inserted, the size of the anchor device increases, and the structure thereof is also complicated. In addition, the conventional U-turn type removal anchor has a form of dismantling the tension member by making the end portion of the tension member inserted into the anchor hole in a U shape, but this requires a separate drawing equipment to remove the tension member and smoothly In order to draw out the tension member, there is a problem that a lubricant is required.

The present invention is to provide a technology capable of removing a steel wire by rotating one end of the steel wire exposed to the outside as a removable anchor, and also to prevent the steel wire from being unintentionally separated by improving the internal structure of the removable anchor fixing head The purpose of this is to provide a technology that improves the stability of fastening and separation of steel wires and improves workability.

The present invention relates to a fixing head of a removable anchor body, the front end is closed and the rear end is open body portion (100, 200); a lock guide member 110 having an inner hollow cylindrical shape provided inside the body; A tip spring (S), a bearing member 130, a rotating bundle 140, a rotation induction bundle 150, a wedge bolt 160 and a wedge 180 provided in sequence from the front to the rear inside the body portion; a guide protrusion 145 formed in the front-rear direction on the outer circumferential surface of the rotating bundle 140; a rotation guide inclined surface formed at the rear end of the guide protrusion (145a); a guide block 112 protruding inward from the inner circumferential surface of the lock guide member 110 and spaced apart from each other with a space 113 in the circumferential direction; a seating groove 114 formed at the tip of the guide block; Formed on the front end surface of the rotation induction bundle 150, by pressing the rotation induction inclined surface (145a) of the rotation induction bundle 140 by forward and backward movement, the rotation induction bundle front concavo-convex portion to induce the rotation of the rotation assembly (153); a rear concave-convex portion 155 of the rotation induction bundle formed on the rear end surface of the rotation induction bundle 150; a wedge bolt concave-convex surface 168 formed at the front end of the wedge bolt 160 and in contact with the rotation induction bundle rear concavo-convex portion 155; a first screw portion 115 formed on an inner peripheral surface of the rear end of the lock guide member 110; a second screw portion 165 formed on the outer peripheral surface of the front end of the wedge bolt 160 and engaged with the first screw portion; and a polygonal fastener 162 provided at the rear of the wedge bolt 160 and coupled to the front end of the steel wire 300 penetrating into the wedge.

The rotation induction bundle 150 is provided to move linearly only in the front and rear directions without rotating inside the lock guide member 110, and rotates in one direction while pressing the steel wire fastened to the wedge bolt 160, the The first screw part 115 and the second screw part 165 are engaged with each other and fastened by an operation of rotating the wedge bolt while moving forward, and as the wedge bolt concave-convex surface 168 rotates, the rotation induction bundle rear concavo-convex part 155 ) to advance the rotation induction bundle 150 by pressing, and the rotation induction bundle front concave-convex portion 153 presses the rotation induction inclined surface 145a forward to rotate the rotation bundle 140, the rotation The guide protrusions 145 of the bundle are alternately positioned in the separation space 113 and the seating groove 114, and the guide protrusions 145 of the rotating bundle 140 are positioned in the separation space 113 of the guide block. In the case of a locking state in which the steel wire is firmly fastened by the wedge 180, when the guide protrusion 145 of the rotating bundle 140 is located in the seating groove 114 of the guide block, the rotating bundle ( 140) is about the structure in which the rear movement is restricted and the steel wire can be removed in an unlocked state.

The present invention improves the structure of the fixing head by the above configuration to facilitate the process of fastening and separating the steel wire, and develops a structure that prevents the fastening and separation positions of the steel wire provided in the fixing head from being unintentionally changed. As a result, the efficiency and reliability of construction are increased. In addition, by facilitating refastening and tensioning of the steel wire, there is an effect of reducing the damage caused by the defective steel wire.

1 and 2 are a perspective view and an exploded perspective view of a removable anchor including a fixing head according to the present invention,
3 is a cross-sectional view of the perspective parts of FIG. 2 ,
4 to 6 are perspective views viewed from different angles of parts provided in the inside of the fixing head according to the present invention,
7 is a cross-sectional view of a lock guide member which is a component provided inside the fixing head according to the present invention;
8 is a part provided inside the fixing head according to the present invention, and shows a state in which the lock guide member and the wedge bolt are screwed to each other;
9 shows a locking state in which the steel wire is coupled and cannot be separated in the removable anchor according to the present invention;
Figure 10 shows an unlocked state in which the steel wire is separable in the removable anchor according to the present invention,
11 shows a one-way fastening member provided in the removable anchor according to the present invention for fixing the hose fastened to the rear of the fixing head.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In addition, the terms used are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

The removable anchor is an anchor having a structure that can be removed later as described above, and the present invention relates to a structure of a fixing head provided at the tip of the anchor. In the description with reference to the drawings below, expressions such as 'tip, front' are meant to mean the direction in which the anchor body moves forward while being inserted into the perforated hole, and expressions such as 'rear end, rear' are used in the perforated hole. It shall mean the direction in which an anchor body retreats (removed).

1 and 2 are a perspective view and an exploded perspective view of a removable anchor including a fixing head according to the present invention, FIG. 3 is a cross-sectional view of the perspective parts of FIG. It is a perspective view of the parts provided in a different angle, FIG. 7 is a cross-sectional view of a lock guide member which is a part provided inside the fixing head according to the present invention, and FIG. 8 is a part provided inside the fixing head according to the present invention. As a , it shows a state in which the lock guide member and the wedge bolt are screwed to each other, and FIG. 9 shows the locking state in which the steel wire is coupled and cannot be separated in the removable anchor according to the present invention, and FIG. 10 is the present invention Shows an unlocked state in which the steel wire is separable from the removable anchor according to FIG. 11 shows a one-way fastening member provided in the removable anchor according to the present invention to fix the hose fastened to the rear of the fixing head.

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

The present invention relates to a removable anchor (or a removable anchor body), and more specifically, to a fixing head of a removable anchor body.

1 to 3, when the body of the fixing head according to the present invention is composed of a front cap 100 and a rear cap 200 that are coupled to each other with screws, the front end is closed and the rear end is open, so that the steel wire is coupled to the rear end do. A lock guide member 110 having a hollow cylindrical shape is provided inside the body portions 100 and 200 . In addition, the front end spring (S), the bearing member 130, the rotating bundle 140, the rotation induction bundle 150, the wedge bolt 160 and the wedge 180 are arranged sequentially from the front to the rear inside the body part .

Referring to FIG. 4 , the rotating bundle 140 has a cylindrical shape, and is provided with guide protrusions 145 formed in the front and rear directions on the outer circumferential surface. The guide protrusion 145 is a portion fastened to the groove of the inner circumferential surface of the lock guide member 110 to be described below. In addition, a rotation guide inclined surface 145a is formed at the rear end of the guide protrusion. The rotation induction inclined surface 145a serves to rotate the rotating bundle 140 by the horizontal component of the force acting on the inclined surface when the pressure is applied in the forward direction.

Referring to Figure 5, the rotation induction bundle 150 is disclosed, the rotation induction bundle is a component that induces the rotation of the rotation bundle 140 as its name suggests, but does not rotate itself. That is, the rotation induction bundle is fastened inside the lock guide member 110 so as to move linearly only in the front-rear direction without rotating. To this end, a guide rod 158 is formed on the outer peripheral surface of the rotation induction bundle 150 along the longitudinal direction, and a guide groove (not shown) in which the guide rod is inserted and moved is formed on the inner peripheral surface of the lock guide member 110 . can

And, on the front end surface of the rotation induction bundle 150, by pressing the rotation induction inclined surface 145a of the rotation induction bundle 140 by forward and backward movement, the rotation induction bundle front concavo-convex portion for inducing the rotation of the rotation assembly (153) is formed, the rear end surface of the rotation induction bundle 150, the rotation induction bundle rear concavo-convex portion 155 is formed.

6 shows the wedge bolt 160 . A polygonal fastener 162 is formed at the rear of the wedge bolt 160 to which the front end of the steel wire 300 penetrating into the wedge is coupled. In addition, a second screw portion 165 is formed on the outer peripheral surface of the front end of the wedge bolt 160 , which has a structure engaged with a lock guide member to be described below. And it has a ring-shaped protrusion 163 protruding in a ring shape on the outer peripheral surface of the wedge bolt and fitted into the groove of the wedge. In addition, a wedge bolt concave-convex surface 168 is formed at the front end of the wedge bolt 160 to abut the rear concave-convex portion 155 of the rotation induction bundle.

7 shows a cross-sectional view so that the inner peripheral surface of the lock guide member 110 is visible. On the inner circumferential surface of the lock guide member 110 , a plurality of guide blocks 112 protruding inwardly are spaced apart from each other at regular intervals. That is, the guide blocks have a structure spaced apart from each other with a space 113 in the circumferential direction of the inner circumferential surface. In addition, a seating groove 114 is formed at the front end of the guide block.

Looking at the anchor body fastening process of the present invention, when the steel wire is fastened to the fastener 162 of the wedge bolt and rotated in one direction (clockwise) while pressing the steel wire forward to overcome the elastic force of the tip spring (S), the wedge bolt rotates as it advances. The first screw portion (115 of FIG. 7 ) and the second screw portion 165 of the inner circumferential surface of the lock guide member 110 are engaged with each other and are fastened by these forward and rotational operations. And, when the steel wire is continuously rotated, the wedge bolt uneven surface 168 rotates while pressing the rotation induction bundle rear uneven portion 155 to advance the rotation induction bundle 150 . The rotation induction bundle has a structure that only performs linear motion in the forward and backward directions. Thereafter, the rotation induction bundle front concavo-convex portion 153 presses the rotation induction inclined surface 145a forward to rotate the rotation bundle 140 . By the rotation of the rotating bundle 140 , the guide protrusions 145 of the rotating bundle are alternately positioned in the separation space 113 and the seating groove 114 .

When the guide protrusion 145 of the rotating bundle 140 is located in the separation space 113 of the guide block, it is a locked state in which the steel wire is firmly fastened by the wedge 180, and of the rotating bundle 140 When the guide protrusion 145 is positioned in the seating groove 114 of the guide block, the rear movement of the rotating bundle 140 is restricted and thus the steel wire can be removed in an unlocked state.

However, the present invention is characterized in that the steel wire is completely separated from the rotating bundle in the locked state and unlocked state. In other words, the parts fastened with the steel wire and the parts fastened with the rotating bundle are separated. Through this, rotation or impact acting on the steel wire does not affect the rotating bundle, so that the locking state can be maintained without any problem even if rotation occurs in the steel wire during construction.

As described above, this is by rotating in one direction while pressing the steel wire fastened to the wedge bolt 160 to achieve a locked state in which the steel wire is firmly fastened, then rotating the steel wire in the other direction to rotate the first screw part 115 and the second This is made possible by releasing the engagement of the screw part 165 and completely separating the wedge bolt 160 from the lock guide member 110 . That is, even when the steel wire receives an unintentional rotation or impact, the guide protrusion 145 of the rotating bundle is positioned in the separation space 113 of the guide block to stably maintain the locking state.

And, as shown in Figure 7, further comprising a tip inclined surface (112a) formed at the tip of the guide block 112, the separation space 113 and the seating groove of the guide protrusion 145 of the rotating bundle 140 It is good to facilitate the movement operation with (114).

And, it is preferable that the hose 220 is connected to the rear of the rear cap 200 of the body part and the steel wire is inserted into the hose to be sealed. To this end, a rubber ring 230 for sealing the inside of the hose is provided on the inner circumferential surface of the rear cap, and the inner surface of the rear cap further includes a fixing spring 250 for fixing the mounted hose. The fixing spring is a one-way fastening member that digs into the outer peripheral surface of the hose when it is coupled with the hose to prevent separation of the hose because it has a structure of a plurality of separate pieces protruding backward as shown in FIG. 11 but protruding obliquely to the inside.

And, the present invention relates to a construction method using the fixing head described above.

In the construction method according to the present invention, first forming a drilling hole in the ground, inserting and fixing the fixing head to which the steel wire is coupled into the drilling hole, grouting the drilling hole, and the steel wire Reinforcing the ground by tensioning, removing the tensile force applied to the steel wire, rotating the steel wire while applying an external force in the opposite direction to the tensile force, separating the steel wire and the wedge, and perforating the steel wire It is a method of constructing a fixing head of a removable anchor consisting of a step of withdrawing it to the outside of the hole.

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

Claims (5)

The front end is closed and the rear end is open structure, and the body portion 100 and 200 made of the front cap 100 and the rear cap 200;
a lock guide member 110 having a hollow cylindrical shape provided inside the front cap of the body;
a tip spring (S), a bearing member 130, a rotary bundle 140, a rotation induction bundle 150, a wedge bolt 160 and a wedge 180 provided in sequence from the front to the rear inside the body portion;
a guide protrusion 145 formed in the front-rear direction on the outer circumferential surface of the rotating bundle 140;
a rotation guide inclined surface formed at the rear end of the guide protrusion (145a);
a guide block 112 protruding inward from the inner circumferential surface of the lock guide member 110 and spaced apart from each other with a space 113 in the circumferential direction;
a seating groove 114 formed at the tip of the guide block;
Formed on the front end surface of the rotation induction bundle 150, by pressing the rotation induction inclined surface 145a of the rotation induction bundle 140 by the forward and backward movement, the rotation induction bundle front concavo-convex portion to induce the rotation of the rotation assembly (153);
a rear concave-convex portion 155 of the rotation induction bundle formed on the rear end surface of the rotation induction bundle 150;
a wedge bolt concave-convex surface 168 formed at the front end of the wedge bolt 160 and in contact with the rotation induction bundle rear concavo-convex portion 155;
a first screw portion 115 formed on an inner peripheral surface of the rear end of the lock guide member 110;
a second screw portion 165 formed on the outer peripheral surface of the front end of the wedge bolt 160 and engaged with the first screw portion; and
Provided at the rear of the wedge bolt 160, the polygonal fastener 162 to which the front end of the steel wire 300 penetrating into the wedge is coupled;
The rotation induction bundle 150 is provided to move in a straight line only in the front and rear directions without rotating inside the lock guide member 110 ,
When the steel wire fastened to the wedge bolt 160 is rotated in one direction while pressing, the first screw part 115 and the second screw part 165 are engaged with each other and fastened by an operation of rotating the wedge bolt while moving forward. As the wedge bolt concave-convex surface 168 rotates, the rotation induction bundle rear concavo-convex portion 155 is pressed to advance the rotation induction bundle 150, and the rotation induction bundle front concave-convex portion 153 is the rotation induction inclined surface 145a. By pressing forward to rotate the rotating bundle 140, the guide protrusions 145 of the rotating bundle are alternately positioned in the separation space 113 and the seating groove 114,
When the guide protrusion 145 of the rotating bundle 140 is located in the separation space 113 of the guide block, the steel wire is firmly fastened by the wedge 180 in a locked state,
When the guide protrusion 145 of the rotating bundle 140 is located in the seating groove 114 of the guide block, the rear movement of the rotating bundle 140 is restricted and the steel wire can be removed in an unlocked state. anchoring head. According to claim 1,
The steel wire fastened to the wedge bolt 160 is rotated in one direction while being pressed so that the steel wire is firmly fastened by the wedge 180, and then the steel wire is rotated in the other direction to rotate the first screw part 115 and the second screw part. By releasing the engagement of (165) and completely separating the wedge bolt (160) from the lock guide member (110),
Even when the steel wire receives an unintentional rotation or impact, the guide protrusion 145 of the rotating bundle is located in the separation space 113 of the guide block, and the locking state can be stably maintained. anchoring head. According to claim 1,
Further including; a tip inclined surface (112a) formed at the tip of the guide block (112)
The fixing head of the removable anchor, characterized in that it facilitates the movement of the guide protrusion (145) of the rotating bundle (140) to the separation space (113) and the seating groove (114). According to claim 1,
The front cap 100 and the rear cap 200 are screwed to each other,
a hose 220 connected to the rear of the rear cap, into which a steel wire is inserted;
a rubber ring 230 provided on the inner circumferential surface of the rear cap to seal the inside of the hose; and
It further includes a; is provided on the inner surface of the rear cap and fixed spring 250 for fixing the mounted hose,
The fixing spring protrudes backward, but protrudes obliquely to the inside, so that when combined with the hose, the fixing head digs into the outer peripheral surface of the hose to prevent the hose from being separated. A method of constructing a fixing head of a removable anchor according to any one of claims 1 to 4,
forming a perforation hole in the ground;
inserting and fixing the fixing head to which the steel wire is coupled into the drilling hole;
grouting the perforated hole;
reinforcing the ground by tensioning the steel wire;
removing the tensile force applied to the steel wire and rotating the steel wire while applying an external force in a direction opposite to the tensile force to separate the steel wire and the wedge; and
A construction method of constructing a fixing head of a removable anchor comprising a; taking out the steel wire to the outside of the drilling hole.

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