KR102458224B1 - Anchor with front-end expansion parts and construction method using the same - Google Patents

Abstract

The present invention provides an anchor which is quickly and sturdily fixed and constructed, has increased drawing resistance to have excellent anchor construction quality, and allows safe anchor construction. The anchor comprises: a plurality of rods (100) arranged in a longitudinal direction to form a body; a first fixing and coupling member (200) fixedly coupled to one side of the rods; a second fixing and coupling member (300) fixedly coupled to the other side of the rods; a sliding member (400) coupled to the rods between the first and second fixing coupling members, and coupled to be slid in the longitudinal direction of the rods; and an expansion member (500) link-coupled to the sliding member and the second fixing and coupling member. The anchor further comprises: a cylinder (220) coupled to the second fixing and coupling member, and allowing fluid to be injected thereinto; a check valve (230) provided on one side of the cylinder to inject the fluid into the cylinder and prevent the fluid from being discharged out of the cylinder; a pressing member (250) wherein one end thereof is positioned inside the cylinder, and the other end thereof is coupled to the sliding member to move as the fluid is injected into the cylinder; and a hose (280) supplying high-pressure fluid into the cylinder. The fluid injected into the cylinder presses the pressing member to move the sliding member to expand the width in a traverse direction of the expansion member.

Description

Anchor body with tip extension and its construction method

The present invention relates to an anchor body and a construction method using the same, and more particularly, an anchor body having an extension part extending in the width direction of the anchor body at a tip end portion, and the extension part expanding in the width direction by injection of a fluid such as air or water. It relates to the technology of increasing the bonding force with the ground and also increasing the pull-out resistance.

In general, the anchor body for ground reinforcement consists of a steel wire that is inserted into the ground to connect 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 tensioned by pulling the steel wire with a hydraulic cylinder, prestressing it, and fixing it 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 later.

According to the removal method of the removable anchor, there were several methods such as a method of removing the anchor with a screw, a method of removing the anchor with gunpowder, and a method of removing the anchor by inserting a removal tension member. 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 it is necessary to insert a tension member for removal, the size of the anchor device is increased, and the structure thereof is also complicated. And, the conventional U-turn type removal anchor is in the 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.

In addition, permanent anchors are used for retaining work and slope stabilization for preventing the collapse of incisions in rocks and ground, landslide suppression, prevention of flotation of large structures such as buildings or dams by groundwater, prevention of flotation of underground structures, and protection of large buildings. It is used to prevent the collapse of the excavated wall during underground civil works. In addition, when constructing buildings such as earthquake-prone areas, large pylons, retaining walls, etc., to prevent overturning, such as movement or distortion of structures, to counteract the reaction force of cantilevers, and to assist in press-fitting in caisson immersion for underwater construction, etc. is installed to do In addition, as patents for conventional anchors, there were registered Patent No. 10-0944455 and Korean Patent Publication No. 10-2013-0069169.

However, the anchor body in the prior art has a problem in that the tip portion of the anchor body deviates during tension due to a small holding stress at the tip fixing portion.

The present invention provides a structure in which the extension of the front end of the anchor body is expanded in the lateral direction by applying compressed air or compressed fluid, so that the anchor body is quickly and firmly fixed in the ground in the anchor hole by expanding a number of wings. An object of the present invention is to provide a distal end extension member capable of fixing and constructing the anchor body, which increases the pull-out resistance of the anchor body, so that the anchor construction quality is excellent, and the anchor body construction with high safety is possible.

The present invention, a plurality of rods 100 disposed in the longitudinal direction to form a body; a first fixed coupling member 200 fixedly coupled to one side of the rod; a second fixed coupling member 300 fixedly coupled to the other side of the rod; a sliding member 400 coupled to the rod between the first and second fixed coupling members and slidably coupled along the longitudinal direction of the rod; The sliding member and the second fixed coupling member, the extension member 500 is coupled to the link; includes, coupled to the second fixed coupling member, the cylinder 220 into which a fluid can be injected; a check valve 230 provided on one side of the cylinder to prevent the fluid from being discharged to the outside of the cylinder while the fluid inside the cylinder is injected; One end is located inside the cylinder and the other end is coupled to the sliding member, the pressure member 250 to move as the fluid is injected into the cylinder; A hose 280 for supplying a high-pressure fluid to the inside of the cylinder; further including; the fluid injected into the cylinder presses the pressing member, and as the sliding member moves, the lateral width of the expansion member is expanded An anchor body is provided.

The check valve includes a ball 232 for opening and closing the fluid inlet formed on one side of the cylinder, and a spring 234 for pressing the ball in a direction to close the fluid inlet.

The pressure member includes a pressure plate 252 provided inside the cylinder and moving along the inner wall of the cylinder, a sealing member 254 provided on an outer circumferential surface of the pressure plate to seal the pressure plate and the inner wall of the cylinder, and from one side of the pressure plate and a pressure rod 256 protruding and disposed through the lower end of the cylinder to be coupled to the sliding member.

The rod is coupled to the outside, the steel wire fastening part 600 to which the tip of the steel wire is fastened to the inside, a first link member 520 for rotatably connecting the expansion member to the sliding member, and the expansion member It further includes a second link member 540 rotatably connected to the second fixed coupling member.

The present invention also provides a construction method using the anchor body.

The present invention improves the structure of the removable anchor by the above configuration to increase the ground bonding force of the tip of the anchor body and increase the pull-out resistance, thereby making it possible to quickly and firmly fix the anchor body, resulting in excellent anchor body construction quality. do.

1 is a perspective view of an anchor body having a distal end extension according to the present invention, showing a state in which the distal end extension portion is not expanded;
Figure 2 is a perspective view of an anchor body having a distal end extension according to the present invention, showing a state in which the distal end extension portion is expanded,
3 is a view of the anchor body shown in FIG. 2 from another angle;
4 is a partially enlarged view of an anchor body having a tip extension according to the present invention,
5 and 6 are cross-sectional views showing the operation inside the cylinder in order to show the principle that the tip extension of the anchor body according to the present invention is expanded.

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.

In the following description with reference to the drawings, 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). In the construction process, the process of drilling a hole and the process of constructing an anchor body are general techniques and already known techniques. Hereinafter, with reference to the drawings, the principle of operation of the tip extension part of the anchor body, which is the core of the present invention, will be mainly described.

1 is a perspective view of an anchor body having a distal end extension according to the present invention, showing a state in which the distal end extended portion is not expanded, Figure 2 is a perspective view of an anchor body having a distal end extended portion according to the present invention, the distal end extended portion is expanded 3 is a view of the anchor body shown in FIG. 2 from another angle, FIG. 4 is an enlarged view of a part of the anchor body having a distal end extension according to the present invention, and FIGS. 5 and 6 are It is a cross-sectional view showing the operation inside the cylinder in order to show the principle that the tip extension of the anchor body according to the present invention is expanded.

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

The present invention relates to an anchor body applicable to both removable anchors and permanent anchors, and is characterized by a structure in which the extension of the tip of the anchor body is expanded in the lateral direction by applying compressed air or compressed fluid to the anchor body that has entered the drilling hole. It is a structure in which the pull-out resistance is increased by quickly and firmly fixing the anchor body in the ground inside the perforation hole by the expansion of a number of wings.

1 is a perspective view of an anchor body in a state of being entered into a perforation hole in the anchor body of the present invention, in a state in which the tip extension part is not expanded. 2 and 3 are views in which the tip extension is expanded by supplying a high-pressure fluid (air or water) from the outside in a state in which the anchor body enters the drilling hole.

1 to 3 and looking at the present invention, the present invention is broadly viewed with a rod 100 having a front end body shape, and first and second fixed coupling members 200 and 300 coupled to the rod and sliding. It includes a member 400, an extension member 500, a steel wire fastening part 600 to which the tip of the steel wire is fastened, and a wedge-shaped member 700 located at the most tip of the rod.

The rod 100 is arranged in a plurality in the longitudinal direction of the perforated hole into which the anchor body is inserted to form an overall body at the tip end, and the first and second coupling members 200 and 300 are fixedly coupled to one side of the rod and are relative positions. It is the absence of movement.

The sliding member 400 is coupled to the rod 100 between the first and second fixed coupling members to be slidably coupled along the longitudinal direction of the rod. The sliding member expands the extension member as it moves to the front end along the length of the rod. For this purpose, the present invention includes a cylinder 220 into which a fluid is injected.

The cylinder 220 has an upper side sealed by the cylinder cap 210 , and the cylinder cap 210 is coupled to the first coupling member 200 . In addition, the cylinder cap 210 is formed with a fluid inlet 215, which is a passage through which the fluid is injected, and a hose 280 to be described below is connected to the fluid inlet to supply a high-pressure fluid from the outside. A check valve 230 is provided to prevent the fluid from being discharged to the outside of the cylinder while the fluid inside the cylinder is injected while sealing the fluid inlet of the cylinder cap. The check valve includes a ball 232 for opening and closing the fluid inlet formed on one side of the cylinder, and a spring 234 for pressing the ball in a direction to close the air inlet.

In addition, a pressing member 250 that moves forward by pressurizing the fluid is provided inside the cylinder. One end of the pressing member is located inside the cylinder and the other end is coupled to the sliding member, and moves as the fluid is injected into the cylinder. Specifically, the pressing member 250 includes a pressing plate 252 provided inside the cylinder and moving along the cylinder inner wall, and a sealing member 254 provided on the outer circumferential surface of the pressing plate to seal the pressing plate and the cylinder inner wall. and a pressure rod 256 protruding from one side of the pressure plate and disposed through the lower end of the cylinder to be coupled to the sliding member.

When a high-pressure fluid (air or water) is supplied through the hose 280 into the cylinder, the injected fluid presses the upper surface of the pressing plate 250 of the pressing member to advance the pressing member. . Accordingly, the sliding member is moved forward, and as a result, the width of the extension member connected to the link member is expanded while rotating in the lateral direction. And, since the check valve allows the fluid to flow only in one direction, the fluid injected into the cylinder 220 cannot escape again, and as a result, the wings of the expansion member 500 continue to spread in the transverse direction. to keep it

This includes a first link member 520 rotatably connecting the rear end of the extension member 500 to the sliding member 400 and a front end of the extension member 500 to the second fixed coupling member 300 . ) is made by a second link member 540 rotatably connected to the. That is, in a state in which the second fixed coupling member is fixedly coupled to the rod and cannot move, as the sliding member moves, the first link member 520 rotates in the lateral direction (direction perpendicular to the rod). By this made, the expansion member is spread in the transverse direction.

In the present invention, a steel wire tip part 650 to which a tip of a steel wire is connected is provided, and the steel wire tip part is coupled to the rod 100 by a steel wire fastening part 600 . That is, the rod is coupled to the outside of the steel wire fastening part 600 , and the front end 650 of the steel wire is fastened to the inside. The front end of the steel wire may be a structure that is separated from the steel wire (removable anchor), or may have a structure that is not separated (permanent anchor).

In addition, the present invention provides a method for constructing the anchor body, for example forming a perforated hole in the ground, inserting and fixing the anchor body of the present invention to which a steel wire is coupled into the perforated hole; While grouting the perforated hole and reinforcing the ground by tensioning the steel wire, a high-pressure fluid is supplied to the hose 280 in the process to expand the extension member 500 in the lateral direction step will be included.

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)

A plurality of rods 100 disposed in the longitudinal direction to form a body;
a first fixed coupling member 200 fixedly coupled to one side of the rod;
a second fixed coupling member 300 fixedly coupled to the other side of the rod;
a sliding member 400 coupled to the rod between the first and second fixed coupling members and slidably coupled along the longitudinal direction of the rod;
Including; and an extension member 500 that is linked to the sliding member and the second fixed coupling member
a cylinder 220 coupled to the second fixed coupling member and into which a fluid can be injected;
a check valve 230 provided on one side of the cylinder to prevent the fluid from being discharged to the outside of the cylinder while the fluid inside the cylinder is injected;
One end is located inside the cylinder and the other end is coupled to the sliding member, the pressure member 250 to move as the fluid is injected into the cylinder;
A hose 280 for supplying a high-pressure fluid to the inside of the cylinder; further including,
Anchor body having a distal end extension, characterized in that the fluid injected into the cylinder presses the pressing member and the lateral width of the extension member is expanded as the sliding member moves. The method of claim 1,
The check valve is an anchor body having a distal end extension, characterized in that it comprises a ball 232 for opening and closing the fluid inlet formed on one side of the cylinder, and a spring 234 for pressing the ball in a direction to close the fluid inlet. The method of claim 1,
The pressure member includes a pressure plate 252 provided inside the cylinder and moving along the inner wall of the cylinder, a sealing member 254 provided on an outer circumferential surface of the pressure plate to seal the pressure plate and the inner wall of the cylinder, and from one side of the pressure plate An anchor body having a distal end extension, characterized in that it comprises a pressure rod (256) that protrudes and is disposed through the lower end of the cylinder and coupled to the sliding member. The method of claim 1,
The rod is coupled to the outside, and the steel wire fastening part 600 to which the front end of the steel wire is fastened to the inside; a first link member 520 for rotatably connecting the extension member to the sliding member; Anchor body having a distal end extension, characterized in that it further comprises; a second link member 540 for rotatably connecting the expansion member to the second fixed coupling member. A construction method using the anchor body according to any one of claims 1 to 4.

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