KR20230055933A - Underground head anchor body for the guard rail post of strengthening bearing power and system and method of strengthening bearing power thereof - Google Patents

Abstract

The present invention relates to a ground head anchor structure (AC), wherein elastic wings pass through a straight length (E1) of a slip straight guide part (E), which is not subjected to underground frictional resistance, then the wings gradually spread underground from tips (122) of the elastic wings, thereby ensuring efficient and smooth spreading while minimizing underground frictional resistance distance. Additionally, the ground head anchor structure (AC) is designed with an assembly structure allowing adjustment to meet design requirements by enabling adjustment of the spreading angle of elastic wings and the lengths of elastic wing suppression control wires. The elastic wings spanning both the inside and outside of an elastic wing friction stop point (f) form a hook-locking shape as crossing each other. Simultaneously, restraining tension (or compressive force) (T) from elastic wing suppression control wires (130a, 130b) acts on the wing tips (122) exposed to the outside, causing the same to close up, thereby further strengthening fixation by the hook-locking shape with the overall behavior. Furthermore, in resisting a vehicle impact load (S), the spread elastic wings of the ground head anchor structure (AC) can maintain the initial spread shape without being retracted backward or deformed.

Description

Underground head anchor structure (AC) for reinforcing the bearing capacity of the guardrail and underground anchor system and underground head anchor structure (AC) for reinforcing the bearing capacity of the guardrail {Underground head anchor body for the guard rail post of strengthening bearing power and system and method of strengthening bearing power thereof}

The present invention relates to an underground head anchor structure (AC) for reinforcing the bearing capacity of a guardrail support, an underground anchor system for reinforcing the bearing capacity of a support, and a guardrail holding support reinforcement method using the underground head anchor structure (AC). In other words, the ground friction resistance distance is minimized by the elastic wing passing through the straight line length E1 of the slip linear guide part E where the ground friction resistance does not reach, and then gradually expanding the ground from the front end 122 of the elastic wing. In addition to making the underground expansion of the elastic wings efficient and smooth, it has an assembly structure capable of adjusting the expansion angle of the elastic wings and the length of the elastic wing restraint adjustment wire, so that it can be adjusted according to the design requirements. , The hook fixing form in which the elastic wings spanning the inside and outside of the friction stop point (f) of the elastic wing is staggered with each other, and among them, the wing tip 122 leaked out to the outside of the elastic wing suppression adjustment wire (130a) (130b) The suppressive tension force (or contraction force) (T) acts Retracts it to form an underground head anchor structure (AC) with stronger hook-fixed form and supports the vehicle impact load (S) while resisting It is an invention in which the expanded elastic wings of the underground head anchor structure (AC) are maintained and resisted in their original shape without being bent or deformed.

A guardrail is a structure installed to prevent a fall in the event of a traffic accident, and at the same time to prevent secondary damage caused by a fall, so that the life of the occupant is not fatal.

At this time, the bearing capacity of the guardrail is a key factor in preventing the vehicle from falling.

In general, about 1.5m of the guardrail support is embedded in the ground soil, and about 0.7m is exposed to the ground surface. It resists the impact load (external force) of the running vehicle by the reaction force (horizontal support force) of the ground (soil) on the 1.5m-high ground support. A support 0.7m above the ground prevents the vehicle from falling away.

The Ministry of Land, Transport and Maritime Affairs regulates the standard value for the holding capacity of guardrails.

According to the Ministry of Land, Infrastructure and Transport, if the width of the flat area behind the guardrail post (hereinafter referred to as “the width of the guardrail flat area”) is 60 cm or more, it is regarded as a flat road section, and if it is less than 60 cm, it is regarded as an embankment road section.

According to this regulation, the standard for the holding capacity (horizontal bearing capacity) of the guardrail in the flat road section is 45KN, and the holding capacity in the embankment road section is 40.5KN, which is 90% of the standard (45KN) for the flat terrain. If is less than the standard value, it is prescribed to reinforce the bearing capacity. Here, the horizontal bearing capacity of the prop refers to the maximum horizontal bearing capacity that occurs within the allowable value of 35 cm in which the prop is pushed away from the ground.

In particular, since the flat part width of the embankment road section in Korea is usually less than 60 cm, it is necessary to reinforce the holding capacity of the guardrail.

Several reinforcement methods have been proposed for the reinforcement of the bearing capacity of guardrails.

Here, since the present invention is an invention related to a wing underground anchor, only the prior art related to the wing underground anchor method will be reviewed.

As a prior art of the wing underground anchor method, Registered Patent No. 10-1557735 (hereinafter referred to as prior art) is the most representative.

The conventional underground anchor 100 for reinforcing a guardrail support of the wing underground anchor method is composed of a wedge member 110, a driving rod 120, and an anchor pipe 130.

Figure 1a is a cross-sectional perspective view of an underground anchor 100 for reinforcing guardrail posts, and Figure 1b is an exploded cross-sectional view of the underground anchor 100 for reinforcing guardrail posts of Figure 1a.

Figure 1c is after removing the driving bar 120 from the underground anchor 100 for reinforcing the guardrail support of Figure 1a, in this state, the wing of the pipe branch 131 through the widening part 112 of the wedge member 110 is umbrella As a state diagram showing the unfolding shape, it can be seen that the "umbrella-shaped anchor wings" form one body with the anchor pipe 130.

1d is a state diagram showing a state in which the anchor pipe 130, which is one body with the "umbrella-shaped anchor wing" of FIG. 1c, is connected and fixed to the guardrail support 10, and the vehicle impact load (S ; External force) is supported by the “umbrella-shaped anchor wings”.

Now, with reference to Figure 1c, we will look at the problem of the underground expansion of the "umbrella-shaped anchor wing".

First, in a state where the underground anchor 100 for reinforcing the guardrail post of FIG. 1a is penetrated into the ground, the pipe branch 131 of FIG. 1c is spread in the ground.

The driving rod 120 must first be removed from the underground anchor 100 for reinforcing the guardrail holding in the ground. Only when the driving rod 120 is removed, the pipe branch 131 and the anchor pipe 130, which are one body, can move freely. As the free pipe branch 131 moves downward, the wings spread through the beveled portion 112.

However, the wedge member 110 of FIG. 1C from which the driving rod 120 is removed has no supporting means. The wedge member 110 without a support means is in a floating state alone. Even though the wings of the pipe branch 131 are unfolded only when the downward moving anchor pipe 130 passes through the widened portion 112 of the wedge member 110, the anchor pipe 130 moves with respect to the wedge member 110 of FIG. When moving downward, the wedge member 110 also moves downward along with the downward movement, so that the wings of the pipe branch 131 that cannot pass through the beveled portion 112 do not spread.

Second, even if the wings of the pipe branch 131 are spread out like an "umbrella shape", as long as the spread of the wings is solely dependent on the inclined plane of the spread portion 112 of the wedge member 110, the opening angle of the wings and its The unfolded length adjustment has a problem of its limitation. Because there is no means of adjustment anywhere. Due to its limitations, there is no design adjustment means that can reflect design requirements such as the type of ground soil and penetration depth to the beveled portion 112 and pipe branch 131 of the wedge member 110 in FIG. From the point of view, there is an inefficient and uneconomical problem.

Third, in supporting the vehicle impact load (S; external force) transmitted through the anchor pipe 130 by the "umbrella-shaped" pipe branch 131 wing, the pipe branch 131 wing moves backward against the external force (S). Since there is no preventive means to prevent bending, there is a problem in that the anchoring force of the wing of the pipe branch 131 is lost while supporting the external force (S) as the wing is easily bent back.

In the present invention, the elastic wings 120a and 120b are driven and penetrated into the ground in a state in which the elastic wings 120a and 120b are concealed and embedded in the anchor head case 110 in which the slip straight guide portion E is formed, and in this state, the extension force of the tension member 300 (F ) is applied, the elastic blades 120a and 120b are moved along the slip linear guide portion (E) where the ground friction resistance does not reach, and at the same time, the tip of the wing flowing out to the ground through the wing outlet groove of the slip linear guide unit (E) Leads the expansion trajectory, and at this time, the leading expansion trajectory flows through the slip straight guide portion (E) where the ground friction resistance does not reach, so that the ground expansion by elasticity is smooth and easy, and the elastic wings that follow it are also smooth like this The elastic wing suppression adjustment wire (130a) (130b) of the design length (d) into which the restraint tension force (T) is introduced while the ground friction resistance is minimized when the elastic wing is expanded by the slip straight guide portion (E) And, by forming an underground head anchor structure (AC) having a mutually organic working relationship with the elastic wing that has reached the design expansion angle (θ), first, the elastic wing spanning the inside and outside of the friction stop point (f) of the elastic wing is staggered with each other In addition to forming a hook fixing form, the restraint tension (or contraction force) (T) of the elastic wing restraint adjustment wire (130a) (130b) acts on the tip of the wing 122 that leaks out to the outside. It is easy to form an underground head anchor structure (AC) of integral behavior with a more powerful fixing form, and secondly, not only is it possible to adjust the design length (d) of the elastic wing restraint adjustment wire (130a) (130b), Third, it is possible to assemble an efficient and economical underground head anchor structure (AC) by adjusting the design expansion angle (θ) of the elastic wing. After passing through the length (E1), the elastic wing is gradually expanded into the ground from the front end 122 of the elastic wing, so that the ground friction distance of the elastic wing is efficiently and smoothly made in a state where the ground friction resistance distance is minimized. Fourth, the assembled The underground head anchor structure (AC) itself resists and supports the external force of the vehicle impact load (S), but maintains the design expansion angle (θ) as it is without the expanded elastic wings being bent or deformed against the external force (S). The purpose is to provide an underground head anchor structure (AC) that is integrally supported by the behavior resistance while being.

First, the configuration of the underground head anchor structure (AC) for reinforcing the holding capacity of the guardrail of the present invention will be described as follows.

In the underground anchor structure for reinforcing the bearing capacity of the support against the vehicle impact load transmitted through the underground anchor and the tension member integrally formed and connected to the ground extension line fixed to the guardrail support,

In the anchor head case 110, the conical tip 112 and the cylindrical body 114 are integrally formed, and the elastic wings 120a, 120b are embedded in the cylindrical body 114, and the elastic wings 120a, 120b ) is formed with a slip straight guide portion (E), which is moved by the extended development force (F) of the tension member 300, and the wing tips 122 of the elastic wings 120a and 120b built into the cylindrical body 114. Wing outflow grooves 1144a and 1144b flowing out into the ground at the top and adjustment wire insertion grooves 1146a and 1146b through which the elastic wing restraint adjustment wires 130a and 130b are inserted are formed, and at this time, the elastic wings ( The shape of 120a) (120b) is a flat fastening part 126 having a fastening groove 1262, a wing part 124 that is bent outward while being integrally close to the vertical shape, and an insertion hole 1222 in the extension line It has a shape consisting of the formed wing tip 122, and the wing fixing spiral portion 312 of the tension member 300 is inserted into the fastening groove 1262 of the plane fastening portion 126 and is integrally fixed with the tension member 300, At the same time, the elastic wing restraining adjustment wires 130a, 130b penetrating the adjustment wire insertion grooves 1146a, 1146b are inserted and fixed into the insertion hole 1222 of the tip 122 of the wing symmetrical on both sides, while the tension member 300 ), a tight restraint tension force (T) is introduced into the elastic wing restraint adjustment wire (130a) (130b) of the design length (d) by the confirmed development force (F), and at the same time, the underground design is confirmed in the elastic wing (120a) (120b) It is an underground head anchor structure (AC) for reinforcing the holding capacity of a guardrail, characterized in that the angle (θ) is formed.

here,

While moving along the slip straight guide part (E) by the extended development force (F) applied to the tension member 300, the elastic wing restraint adjustment wire (130a) (130b) of the design length (d) is introduced with a tight restraint tension force (T) , At the same time, the elastic wing (120a) (120b) has a ground design angle (θ), and in this state, the design angle (θ) supported by the elastic wing friction stop point (f) by the tight restraint tension force (T) The elastic wing (120a) (or 120b) of the elastic wing (120a) (or 120b) is not only tightly fixed and supported, but also due to the contraction force of the tight restraint tension force (T) in the opposite direction of the opening of the elastic wing (120a) (or 120b) 120a) (or 120b) and the anchor head case 110 form a cross-shaped hook fixing shape, and the elastic blades 120a and 120b have the anchor head case 110 at the friction stop point f of the elastic blades 120a and 120b as a medium. ) and the elastic wing restraining wire (130a) (130b) is an underground head anchor structure (AC) for reinforcing the holding capacity of the guardrail, characterized in that one organism is formed.

also,

The support fixing spiral portion 314, which is the ground end of the tension member 300 inserted into the fastening groove 1262 of the flat fastening portion 126 of the elastic wings 120a and 120b, is fastened to the guardrail support P It is an underground head anchor structure (AC) for reinforcing the holding capacity of a guardrail, characterized in that it is fixed to the fastening support iron piece 600.

Second, the configuration of the underground anchor system for reinforcing the bearing capacity of the holding of the present invention is described as follows.

In the underground anchor system for reinforcing the bearing capacity of the support against the vehicle impact load transmitted through the underground anchor and the ground extension line of the tension member integrally formed and connected thereto fixed to the guard rail support,

In the anchor head case 110, the conical tip 112 and the cylindrical body 114 are integrally formed, and the elastic wings 120a, 120b are embedded in the cylindrical body 114, and the elastic wings 120a, 120b ) is formed with a slip straight guide portion (E), which is moved by the extended development force (F) of the tension member 300, and the wing tips 122 of the elastic wings 120a and 120b built into the cylindrical body 114. Wing outflow grooves 1144a and 1144b flowing out into the ground at the top and adjustment wire insertion grooves 1146a and 1146b through which the elastic wing restraint adjustment wires 130a and 130b are inserted are formed, and at this time, the elastic wings ( The shape of 120a) (120b) is a flat fastening part 126 having a fastening groove 1262, a wing part 124 that is bent outward while being integrally close to the vertical shape, and an insertion hole 1222 in the extension line It has a shape consisting of the formed wing tip 122, and the wing fixing spiral portion 312 of the tension member 300 is inserted into the fastening groove 1262 of the plane fastening portion 126 and is integrally fixed with the tension member 300, At the same time, the elastic wing restraining adjustment wires 130a, 130b penetrating the adjustment wire insertion grooves 1146a, 1146b are inserted and fixed into the insertion hole 1222 of the tip 122 of the wing symmetrical on both sides, while the tension member 300 ), the elastic wings 120a and 120b flow out into the ground through the wing outflow grooves 1144a and 1144b while the elastic wings move along the slip straight guide portion E by the expansion force F of ), and at the same time the design confirmation is confirmed. The opening angle (θ) is made, and at the same time, a tight restraint tension force (T) is introduced to the elastic wing restraint adjustment wire (130a) (130b) of the design length (d), and in this state, the elastic wing friction stop point (f) Elastic wing suppression adjustment wire fastened to the tip 122 of the wing of the design expansion angle (θ) while the elastic wing (120a) (120b), which has been expanded outflow throughout the inside and outside, forms a hook fixed form with respect to the friction stop point (f) ( The restraint tension force (contraction force) (T) by 130a) (130b) acts on the tip of the wing 122 and retracts it, resulting in a more robust hook-fixed underground head anchor structure (AC), and this structure (AC ) resists the vehicle impact load (S), but the expanded elastic wing is not bent back or deformed, and the design expansion angle (θ) is maintained as it is, characterized in that the behavior resistance is supported integrally against the external force (S) It is an underground anchor system that reinforces the bearing capacity of the prop.

here,

The slip straight guide portion (E) is formed in the cylindrical body 114 of the anchor head case 110, and the elastic wings 120a and 120b are concealed in the slip straight guide portion E, and at this time, the elastic wings 120a ( The plane fastening part 126 of 120b) is placed under the slip straight guide part E, and the wing tip 122 is placed in the wing outflow grooves 1144a and 1144b of the anchor head case 110 on the upper part, In this state, when the extended development force (F) is applied to the tension member 300, the elastic blades 120a and 120b move along the slip straight guide portion E, and the upper wing tip 122 moves through the wing outflow groove 1144a ) (1144b), and at the same time, the tight restraint tension (T) is introduced into the elastic wing restraint adjustment wire (130a) (130b) of the design length (d), and the elastic wing (120a) (120b) is also designed While reaching the opening angle (θ), the elastic blade restraint adjustment wire (130a) (130b) into which the tight restraint tension (T) is introduced, and the elastic blade (120a) (120b) having the design expansion angle (θ) It is an underground anchor system that reinforces the bearing capacity of the support, characterized in that the resistance support against the external force (S) is made by this operating relationship by making an integral operating relationship through the anchor head case 110.

also,

In the expansion movement distance of the elastic wing, the elastic wing passes through the slip straight guide portion (E) where the ground friction resistance does not reach, and then gradually expands from the tip 122 of the elastic wing to the ground, in a state where the ground friction resistance distance is minimized It is an underground anchor system that reinforces the bearing capacity of the support, characterized in that the underground expansion of the elastic wing is performed smoothly.

In the present invention, the ground friction resistance distance is minimized by the elastic wing passing through the straight length E1 of the slip straight guide part E where the ground friction resistance does not reach, and then gradually expanding the ground from the front end 122 of the elastic wing. In addition to having the effect of efficiently and smoothly expanding the ground of the elastic wing, it has an assembly structure capable of adjusting the expansion angle of the elastic wing and the length of the elastic wing suppression adjustment wire, so that it can be adjusted according to the design requirements. There is a hook fixing form in which the elastic wings spanning the inside and outside of the friction stop point (f) of the elastic wing are staggered with each other, and among them, the elastic wing suppression adjustment wire (130a) (130b) ) restraint tension (or contraction force) (T) acts Resist vehicle impact load (S) while retracting it to form an integrally-moving underground head anchor structure (AC) in which the fixation of the hook fixing form is more powerful In support, it is a useful invention that has the effect of maintaining and resisting the expanded elastic wings of the underground head anchor structure (AC) in their original shape without being bent or deformed.

[Figure 1a] A cross-sectional perspective view of the prior art of the underground anchor 100 for reinforcement of the guardrail support
[Figure 1b] An exploded cross-sectional view of the underground anchor 100 for reinforcing the guardrail post of Figure 1a
[Fig. 1c] After removing the driving bar 120 from the underground anchor 100 for reinforcing the guardrail post of Fig. 1a, in this state, the pipe branch 131 wing passes through the widening part 112 of the wedge member 110 The state of being unfolded in the form of an umbrella
[Fig. 1d] A state diagram showing a state in which the "umbrella-shaped anchor wing" of Fig. 1c and the anchor pipe 130, which are one body, are connected and fixed to the guardrail support 10
[Figure 2a] A cross-sectional perspective view of the "drive-through anchor structure" of the ground assembly work for underground driving penetration of the present invention
[Figure 2b] an exploded cross-sectional view of Figure 2a
[Figure 2c] Disassembled and combined cross-sectional view showing the removal of the driving plate and the washer fixing nut in Figure 2a
[Figure 2d] cross-sectional view showing the shape of a tension member, which is a part of the "anti-piercing anchor structure" of the present invention
[Figure 2e] a cross-sectional view showing the shape of an anchor case, which is a part of the "anti-piercing anchor structure" of the present invention
[Figure 2f] a perspective view of an elastic wing, which is a part of the "anti-piercing anchor structure" of the present invention
[Figure 2g] a perspective view of a washer fixing nut, which is a part of the "anti-piercing anchor structure" of the present invention
[Fig. 3a] A state diagram showing a state in which the "drive-through anchor structure" of Fig. 2a is located on the ground surface to prepare for underground driving penetration
[Fig. 3b] A state diagram showing a state in which the "anti-piercing anchor structure" of Fig. 3a is penetrated into the ground
[Fig. 3c] After removing the driving plate and the washer fixing nut from the "halving penetration anchor structure" of Fig. 3b, connect the connecting rod to the tension member and apply the extension force (F) to it to widen the elastic wing and the elastic wing suppression adjustment wire. A state diagram showing the state in which the expanded underground head anchor structure (AC) is formed
[Figure 4] A state diagram specifically expressing the underground head anchor structure (AC) of Figure 3c
[Fig. 5a] A state diagram showing a state in which the tension member and the support iron piece of the underground head anchor structure (AC) of Fig. 4 are fastened and fixed
[Figure 5b] A plan view showing a state in which the two underground head anchor structures (AC) of Figure 5a are fastened to the semicircular iron piece of the support
[Figure 5c] A plan view showing a state in which one underground head anchor structure (AC) of Figure 5a is fastened to the circular iron piece of the post

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

The underground head anchor structure (AC) for reinforcing the bearing capacity of the guardrail is an underground structure composed of reference numerals 100 (head anchor) in FIG. It is a structure that resists and supports the vehicle impact load (S) of the guardrail support (P).

The underground head anchor structure (AC) of FIG. 4 includes the tension member 300, and the elastic wings 120a and 120b of the design angle θ and the elastic wing suppression adjustment wire 130a and 130b of the design length d. ) It is a design underground head anchor structure (AC) made of.

At this time, the suppression contraction tension force (T) is introduced to the elastic wing restraint adjustment wire (130a) (130b) of the design length (d) by the confirmed development force (F) of the tension member 300, and the elastic wing (120a) (120b) A design critical angle θ is formed. In addition, in this state, the elastic wings spanning the inside and outside of the friction stop point (f) of the elastic wing form a hook fixing form in which the elastic wings are staggered with each other, and among them, the elastic wing suppression adjustment wire 130a ( 130b) of restraint tension (or contraction force) (T) acts and retracts it, thereby forming an underground head anchor structure (AC) of integral behavior, in which the fixation of the hook fixing type is further strengthened.

In this way, the design underground head anchor structure (AC) is buried in the ground as shown in FIG. 5A and resists and supports the vehicle impact load (S) as it is.

However, as shown in FIG. 4, the design underground head anchor structure (AC) is in a state where the elastic wing restraint adjustment wire (130a) (130b) into which the restraint tension (T) is introduced is wide open, and the elastic wing (120a) (120b) is also wide open Since it is in this state, it is impossible to penetrate the driving underground as it is with this design underground head anchor structure (AC). This is because the elastic wings and the elastic wing restraint adjustment wires 130a and 130b are damaged due to ground frictional resistance during penetration.

In the underground penetration, instead of the underground head anchor structure (AC), the “anti-penetration anchor structure” of FIG. 3A with minimized ground friction resistance is penetrated. The "drive-through anchor structure" is a configuration in which a drive support 200, a drive plate 400, and a washer fixing nut 217 are added to the underground head anchor structure AC of FIG. 4. The added configuration is the relevant configuration for penetration into the ground only. While the "anti-penetration anchor structure" is "ground assembly work", the underground head anchor structure (AC) is "underground manipulation work" with the "anti-penetration anchor structure" as a preceding structure. At this time, the connection assembly of the anchor head case 110 and the driving support 200 of the "drive-through anchor structure" of FIG. 3A is a slide method. The tension member 300 is a fixing member for fixing the upper and lower ends. The lower end of the tension member 300 is fastened to the flat fastening part 126 of the elastic wing, and the upper end thereof is fixed to the washer fixing nut 217 supported by the assembly connection part 216. Between the upper and lower fixings, the connection assembly portion of the anchor head case 110 and the driving support 200 is positioned. Since the connection assembly part is fixed by the tension member 300 of the top and bottom fixation, the same fixation is performed only by the slide assembly without separate fixation (helical coupling, etc.). For this reason, the sliding portion 212 of the driving support 200 is slidably inserted into the anchor head case 110. The slide method has an advantage in that it is easy to insert and assemble the anchor head case 110 of the driving support 200 and also to remove the driving support 200 after penetration.

Elastic wings 120a, 120b of the "anti-piercing anchor structure" and elastic wing suppression adjustment wire 130a ( 130b) is wide open.

The conversion process from the previous structure's "anti-penetration anchor structure" to the underground head anchor structure (AC) consists of three steps. A description of this is as follows.

[Step 1] Underground Intrusion Process

The "anti-penetration anchor structure" of ground assembly is shown in Figure 3a.

The first process is a process of penetrating the “anti-piercing anchor structure” of FIG. 3a into the ground as shown in FIG. 3b. The elastic wings 120a and 120b of FIG. 3B are concealed within the slip straight guide portion E of the anchor head case 110. The elastic wing restraining adjustment wires 130a and 130b are also in a state in which the restraining tension force T is not introduced.

[Course 2] Underground Elastic Wing Expansion Process

The second process is a process in which the concealed elastic wings 120a and 120b and the elastic wing suppression adjustment wires 130a and 130b are spread wide by the expansion and development force F of the tension member 300, as shown in FIG. 3C. In order to apply the expansion force F to the tension member 300 of FIG. 3C, it is necessary to remove the driving plate 400 and the washer fixing nut 217 in FIG. 3B (see FIG. 2C).

After removing this, by applying the expansion development force (F) to the protruding tension member 300, the elastic wings 120a and 120b move upward along the slip straight guide portion E and expand into the ground, along with the elastic wing suppression adjustment wire (130a) (130b) is unfolded while the restraining tension (T) is introduced. At this time, if it is not easy to apply the extension force (F) due to the short protruding length of the tension member 300 on the connecting assembly part 216, a connecting foot bar 317 can be used (see Fig. 3c).

[Third process] Ground removal process of driving support (200)

In the third process, the driving support 200 is slided from the anchor head case 110 in the second process in FIG. This is the process of pulling it out and removing it from the ground. It is the underground head anchor structure (AC) of FIG. 4 that the driving support 200 is removed. The underground head anchor structure AC is a structure converted from the "anti-piercing anchor structure".

Now, the configuration and assembly of the "anti-penetration anchor structure" of ground assembly, and the technical characteristics of the underground head anchor structure (AC) will be described.

First, the configuration and assembly of the "hanging penetration anchor structure" will be described with reference to FIG. 3A.

The "anti-piercing anchor structure" is fastened to the anchor head case 110, the elastic wings 120a, 120b completely concealed in the slip straight guide portion E, and a pair of wing tips 122, thereby extending its scope It is composed of elastic blade restraint adjustment wires (130a) (130b) for adjusting, and a tension member (300) spirally coupled to the flat fastening portion (126) of the elastic wings (120a) (120b).

More specifically, a slip straight guide portion E is formed in the cylindrical body 114 of the anchor head case 110, and wing outflow grooves 1144a and 1144b are formed at the top thereof, and the tip of the wing 122 ) is located in the wing outflow grooves 1144a and 1144b, and the flat fastening part 126 of the elastic wings 120a and 120b is located at the lower end of the wing outflow grooves 1144a and 1144b. Adjustment wire insertion grooves 1146a and 1146b are formed above, and both ends of the elastic wing restraint adjustment wires 130a and 130b pass through the adjustment wire insertion grooves 1146a and 1146b to form a pair of wing tips 122 It is a configuration in which each is inserted and fixed into the insertion hole 1222 of the.

At this time, the length of the elastic wing suppression adjustment wire (130a) (130b) is not only possible to adjust the design length (d) according to the design conditions such as the type of underground soil and penetration depth, but also the elastic wing (d) by the design length (d). It is also easy to adjust the design expansion angle (θ) of 120a) (120b).

In this way, the elastic wings and the elastic wing suppression adjustment wires 130a, 130b are formed by the expansion development force F of the tension member 300 in the state where the "anti-piercing anchor structure" with minimized ground friction resistance of FIG. 3a is penetrated into the ground. will unfold

Next, the configuration of the underground head anchor structure AC, which is the conversion structure of the "anti-piercing anchor structure", will be described as follows.

In the underground head anchor structure (AC), as shown in FIG. 4, the driving support 200 spreads out the elastic wings and the elastic wing suppression adjustment wires 130a and 130b by the expansion and development force F of the tension member 300. This is a removed configuration. The tensile member 300 of the underground head anchor structure (AC) of FIG. 4 is fastened and fixed to the fastening support iron piece 600 of the support (P) to resist and support the vehicle impact load (S).

Next, the technical characteristics of the underground head anchor structure (AC) will be described.

First, regarding the technical characteristics of the slip straight guide part (E) of the underground head anchor structure (AC)

The slip straight guide part (E) is a vertical space where the ground friction resistance does not reach and a space where the elastic wings are completely concealed.

In addition, the straight line length (E1) of the slip straight guide portion (E) is the length (E2) of the fully concealed elastic wing and the same length as the underground expansion length (E2) of the elastic wing. Here, for convenience of explanation, the numbers 1 and 2 are given to E only.

The total moving distance (Et) of the elastic wing for ground expansion is the distance that is the sum of the straight line length (E1) of the slip straight guide part (E) and the ground expansion length (E2) of the elastic wing.

However, after the elastic wing passes through the straight line length (E1) of the slip straight guide part (E) where the ground friction resistance does not reach, then it is gradually expanded from the tip 122 of the elastic wing to the ground, so that the ground friction resistance distance is minimized. It has the characteristic that the ground expansion of the wings is performed efficiently and smoothly.

Referring to FIG. 4, the lengths of the slip linear guide portion E are a1-a2 and b1-b2. Since the elastic wings are completely concealed in the slip straight guide part E, the length of the extended elastic wing and the slip straight guide part E are the same.

Second, regarding the technical characteristics that can adjust the design length (d) of the elastic wing restraint adjustment wire (130a) (130b) and the design expansion angle (θ) of the elastic wing (120a) (120b)

Since the underground head anchor structure (AC) is a structure in which the anchor head case 110, elastic wings, and elastic wing restraint adjustment wires 130a and 130b are assembled, the length adjustment of the elastic wing restraint adjustment wires 130a and 130b And, it is possible to adjust the expansion angle (θ) of the elastic wing, and at the same time, it has its assembly characteristics in ease.

In addition, by adjusting the length of the elastic blade restraint adjustment wire (130a) (130b) to the design length (d) according to its assembly characteristics, it is possible to adjust the design expansion angle (θ) of the elastic blade, and it is effective due to these design values. It has the design and assembly characteristics of an economical and optimized underground head anchor structure (AC).

Third, regarding the technical characteristics of the anchor head case 110 hook fixing form by the elastic wing across the inside and outside of the elastic wing friction stop point (f)

The elastic wings spanning the inside and outside of the friction stop point (f) form a hook fixing form in which the elastic wings are staggered with each other, and among them, the elastic wing suppression adjustment wire (130a) (130b) is suppressed at the tip of the wing 122 that leaks out to the outside Tension force (or contraction force) (T) acts · It has the characteristics of the underground head anchor structure (AC) of integral behavior, which makes the fixation of the hook fixing form more powerful by retracting it. At this time, the restraining tension force (T) of the elastic wing restraining adjustment wire (130a) (130b) acts as a contraction force with respect to the elastic wing (120a) (120b).

In addition, when the underground head anchor structure (AC) of integral behavior by the hook fixing form resists the vehicle impact load (S), the expanded elastic wings of the underground head anchor structure (AC) are the first to be expanded without being bent back or deformed. It retains its shape and has resistance-bearing characteristics.

On the other hand, the connection between the tension member 300 of the underground head anchor structure (AC) and the fastening support iron piece 600 of the support (P) will be described as follows.

As the tension member 300 of the underground head anchor structure (AC) is fixed to the fastening support iron piece 600 of the support (P), the vehicle impact load (S) transmitted through the tension member 300 is transferred to the underground head anchor structure (AC). is supported by resistance (Fig. 5a needle).

The shape of the fastening iron piece 600 fastened to the support P is, for example, a semi-circular iron piece 620 and an arc-shaped iron piece 610.

The semicircular iron piece 620 has a shape in which straight fastening portions 622 are integrally formed at both ends of the semicircular shape, as shown in FIG. 5B. One semicircular iron piece 620 surrounds half of the post P, and the tension member 300 of each underground head anchor structure AC is inserted into the tension member fastening holes 6224 on both sides of the straight fastening part 622 of the iron piece. concluded The semicircular iron piece 620 is used for connecting and fixing the two underground head anchor structures (AC).

In addition, the arc-shaped iron piece 610 has a shape in which straight fastening portions 612 are integrally formed at both ends of the arc-shaped arc, as shown in FIG. 5C. The tension member 300 and the eye bolt 616 of the underground head anchor structure AC are fastened, and the U bolt 614 is connected to the eye bolt 616. In this state, the U-bolt branch 6142 is inserted and fastened into the U-bolt fastening hole 6122 of the straight fastening part 612 of the arc-shaped iron piece 610 surrounding the pillar P. The arc-shaped iron piece 610 is used for connecting and fixing one underground head anchor structure (AC). At this time, the circular arc -shaped iron piece 610 is preferably a circular arc smaller than a semicircle.

In this way, even if the tension member 300 is fixed to the fastening support iron piece 600 of the support P, the shape of the underground head anchor structure AC spread out in FIG. 4 is maintained as it is.

At this time, it is preferable to form an impact reaction control unit 316 on the tension member 300 connected to the fastening support iron piece 600. This is to protect the fatal life of the occupant due to the reaction of the vehicle impact load (S).

On the other hand, the configuration of the guardrail holding force reinforcement method using the underground head anchor structure (AC) of the present invention will be described as follows.

The underground anchor and the ground extension line of the tension member integrally formed and connected thereto are fixed to the guardrail support, and the support force reinforcement method for reinforcing the support capacity of the support against the vehicle impact load transmitted through the tension member

(a) In the structural shape of the anchor head case 110, the elastic wings 120a, 120b, the tension member 300, the driving support 200, and the driving plate 400, the structure of the anchor head case 110 has a conical tip ( 112) and the cylindrical body 114 are integrally formed, but the wing outflow grooves 1144a, 1144b and the adjustment wire insertion grooves 1146a, 1146b are formed in the cylindrical body 114, and the wing outflow grooves 1144a, 1144b are formed. ) And the inside of the cylindrical body 114 between the conical tip 112, a slip straight guide portion E of a certain length is formed, and the adjusting wire insertion grooves 1146a and 1146b are longer than the wing outlet grooves 1144a and 1144b. Located above, the structure of the elastic wings (120a) (120b) is integrally formed with a flat fastening part 126 and two symmetrical wing parts 1224, and the two wing parts 1224 are flat fastening part 126 It is close to vertical with respect to the wing tip 122 and is bent outward more and more, and the structure of the driving support 200 has a connection assembly part 216 at the top of the hollow shape, and a slide part 212 and a stop support at the bottom ( 214) are integrally formed, while fabricating them all;

(b) The wing fixing spiral part 312 of the tension member 300 is inserted into the insertion hole 1222 of the flat fastening part 126, and the elastic wings 120a, 120b integrally fastened and fixed are attached to the anchor head case 110. It is inserted over the slip straight guide part (E) in the cylindrical body 114, but the wing tips 122 of the elastic wings 120a, 120b slightly protrude into the wing outflow grooves 1144a, 1144b, and adjusted in this state. Insert both ends of the design length (d) of the elastic blade restraint adjustment wire (130a) (130b) passing through the wire insertion groove (1146a) (1146b) into the insertion hole of the wing tip 122 of the elastic blade (120a) (120b). After inserting and fixing in 1222, the long extension of the tension member 300 is inserted into the hollow part of the driving support 200 and protrudes above the connection assembly part 216, and the protruding tension member 300 is fixed The spiral portion 314 is spirally fixed by the washer fixing nut 217 supported by the connection assembly portion 216, and the driving plate 400 is assembled thereon. At this time, the protruding end of the tension member 300 is driving assembling an underground driving penetration structure in which elastic wings are completely concealed by being assembled so as not to deviate from the driving surface 416 of the plate 400;

(c) striking the driving surface (416) of the underground driving penetration structure in which the elastic wings assembled in step (b) are completely concealed to penetrate the ground;

⒟ In the underground driving penetration structure in which the underground penetration is completed and the elastic wing is completely concealed, the driving plate 400 and the washer fixing nut 217 are disassembled and removed, and the elastic wing (F) is applied to the free end of the tension member 300 to 120a) (120b) is expanded into the ground through the wing outflow grooves (1144a) (1144b), and at the same time, a tight restraint tension (T) is introduced into the elastic wing restraint adjustment wire (130a) (130b) of the design length (d). The step of forming the “underground head anchor structure (AC) + driving support 200” having the design angle θ on the elastic wings 120a and 120b:

⒠ In the “underground head anchor structure (AC) + driving support 200” in step ⒟ above, the driving support 200 is pulled out from the anchor head case 110 in a sliding manner Removing it from the ground so that only the "head anchor structure (AC) in the ground" remains in the ground;

(a) fastening and fixing the holding fixing spiral portion (314) of the ground tension member (300) of the "underground head anchor structure (AC)" in step (a) to the fastening support iron piece (600) of the post (P); It is a guardrail holding support reinforcement method using an underground head anchor structure (AC).

here,

In step C, the driving support 200 is removed from the ground, and then a single pipe (small steel pipe) having a length of 15 to 35 cm is inserted into the hole made by the driving support 200, and the tension member 300 penetrates the single pipe, The installation position of the single pipe is a guardrail holding force reinforcement method using an underground head anchor structure (AC), characterized in that it includes the step of being located from the ground surface to the depth of its length.

In addition, when two of the "underground head anchor structure (AC) + tension member 300" in step ⒠ are constructed in the ground, the two tension members 300 extending to the ground are fastened to the guardrail support (P) supporting iron piece ( 600), the fastening supporting iron piece 600 has a structure in which the semicircular iron piece 620 and the straight fastening part 622 having the tension material fastening hole 6224 are integrally formed on both sides, while the guardrail support With respect to (P), half of the support is wrapped by a semicircular iron piece 620 structure, and at this time, two extension members 300 are inserted into the tension member fastening holes 6224 of the straight fastening part 622, respectively, and this It is a guardrail holding support reinforcement method using an underground head anchor structure (AC), characterized in that it includes the step of fastening and fixing.

Not only that,

When one "underground head anchor structure (AC) + tension member 300" in step (a) is constructed in the ground, one tension member 300 extended to the ground is interposed between an eye bolt 616 and a U bolt 614. In fixing to the structure of the arc-shaped iron piece 610 of the guardrail post P, this structure consists of the arc-shaped iron piece 610 and the straight fastening part 612 having the U-bolt fastening hole 6122 integrally On the other hand, the front end of the tension member 300 is fastened with the eye bolt 616, the U bolt 614 is connected to the eye bolt 616, and the U bolt branch portion 6142 is the guardrail post (P) It is a guardrail holding support reinforcement method using an underground head anchor structure (AC) characterized by the step of inserting and fixing the arc-shaped iron piece 610 wrapped around the U bolt fastening hole 6122 of the straight fastening part 612.

Here, in step (a), the driving support 200 is removed from the ground, and then a single pipe (small steel pipe) having a length of 15 to 35 cm is inserted into the hole made by the driving support 200, and the tension member 300 penetrates the single pipe. And, the installation position of the short pipe is located from the ground surface to the depth of its length to prevent and minimize the movement of the tension member 300. The tension member 300 is also preferably a tension round bar.

In summary, as the elastic wings protrude and expand through the anchor head case 110 by the design confirmation development force (F) of the ground work, the design expansion angle is reached, even if a force greater than the design expansion development force (F) corresponding to the design expansion angle is applied. Even if it is, the anchoring force of the "underground head anchor body (AC)" in the ground that cannot be seen with the naked eye is achieved by the design length (d) of the elastic wing restraint and adjustment wire (130a) (130b) so that the design opening angle is accurately made in the ground. Its feature is that not only the support design value is reliably introduced and reflected, but also the conversion to the “underground head anchor body (AC)” is simple and easy, making it efficient and economical. In addition, the configuration of the "head anchor body (AC)" and the underground anchor system of the present invention are technologies that are applied to ground anchors as they are, as long as the same conditions and functions are performed, and the interpretation thereof is also interpreted in the same way.

AC; Underground head anchor structure (AC), P; landlord,
100; Head anchor (100),
110; anchor head case, 112; Conical tip, 114; Cylindrical body, E; Slip straight line induction part (E), 1144a, 1144b; Wing outflow grooves, 1146a, 1146b; adjustment wire insertion groove, f; Elastic wing friction stop point (f),
120a, 120b; Elastic wing, 122; wing tips 122, 1222; insertion hole, 124; Wing part, 126; flat fastening parts 126, 1262; fastening groove, 126b; fastening nut,
130a, 130b; Elastic wing restraint adjustment wire, 132; adjustment wire end,
200; Driving support (200), 212; slide unit, 214; stop support, 216; Connection assembly unit 216, 217; Washer fixing nut (217)
300; Tension member (or tension round bar), 312; Wing fixing spiral part, 314; holding fixed spiral part, 316; Impact reaction control unit, 317; Connection bar (317),
400; Hangtapan, 412; connection joint, 4122; driving support, 414; Tension material insertion hole, 416; driving side (416),
600; Fastening support iron pieces (600), 610; Arc-shaped iron pieces 610 and 612; Straight fastening parts 612, 6122; U-bolt fastening holes (6122), 614; U-bolt, 6142; U-bolt branches 6142, 616; eye bolt, 620; semicircular iron pieces 620 and 622; Straight fastening parts 622, 6224; Tension member fastening hole (6224),

Claims (10)

In the underground anchor structure for reinforcing the bearing capacity of the support against the vehicle impact load transmitted through the underground anchor and the tension member integrally formed and connected to the ground extension line fixed to the guardrail support,
In the anchor head case 110, the conical tip 112 and the cylindrical body 114 are integrally formed, and the elastic wings 120a, 120b are embedded in the cylindrical body 114, and the elastic wings 120a, 120b ) is formed with a slip straight guide portion (E), which is moved by the extended development force (F) of the tension member 300, and the wing tips 122 of the elastic wings 120a and 120b built into the cylindrical body 114. Wing outflow grooves 1144a and 1144b flowing out into the ground at the top and adjustment wire insertion grooves 1146a and 1146b through which the elastic wing restraint adjustment wires 130a and 130b are inserted are formed, and at this time, the elastic wings ( The shape of 120a) (120b) is a flat fastening part 126 having a fastening groove 1262, an outwardly curved wing part 1224 integrally close to a vertical shape, and an insertion hole 1222 on the extension line It has a shape consisting of the formed wing tip 122, and the wing fixing spiral portion 312 of the tension member 300 is inserted into the fastening groove 1262 of the plane fastening portion 126 and is integrally fixed with the tension member 300, At the same time, the elastic wing restraining adjustment wires 130a, 130b penetrating the adjustment wire insertion grooves 1146a, 1146b are inserted and fixed into the insertion hole 1222 of the tip 122 of the wing symmetrical on both sides, while the tension member 300 ), a tight restraint tension force (T) is introduced into the elastic wing restraint adjustment wire (130a) (130b) of the design length (d) by the confirmed development force (F), and at the same time, the underground design is confirmed in the elastic wing (120a) (120b) Underground head anchor structure (AC) for reinforcement of guardrail holding capacity, characterized in that the angle (θ) is made According to claim 1
While moving along the slip straight guide part (E) by the extended development force (F) applied to the tension member 300, the elastic wing restraint adjustment wire (130a) (130b) of the design length (d) is introduced with a tight restraint tension force (T) , At the same time, the elastic wing (120a) (120b) has a ground design angle (θ), and in this state, the design angle (θ) supported by the elastic wing friction stop point (f) by the tight restraint tension force (T) The elastic wing (120a) (or 120b) of the elastic wing (120a) (or 120b) is not only tightly fixed and supported, but also due to the contraction force of the tight restraint tension force (T) in the opposite direction of the opening of the elastic wing (120a) (or 120b) 120a) (or 120b) and the anchor head case 110 form a cross-shaped hook fixing shape, and the elastic blades 120a and 120b have the anchor head case 110 at the friction stop point f of the elastic blades 120a and 120b as a medium. ) and the elastic wing restraining wire (130a) (130b) underground head anchor structure (AC) for reinforcement of guardrail holding force, characterized in that one organism is formed According to claim 1 or 2
The support fixing spiral portion 314, which is the ground end of the tension member 300 inserted into the fastening groove 1262 of the flat fastening portion 126 of the elastic wings 120a and 120b, is fastened to the guardrail support P An underground head anchor structure (AC) for reinforcing the holding capacity of a guardrail, characterized in that it is fixed to the clamping support iron piece (600) In the underground anchor system for reinforcing the bearing capacity of the support against the vehicle impact load transmitted through the underground anchor and the ground extension line of the tension member integrally formed and connected thereto fixed to the guard rail support,
In the anchor head case 110, the conical tip 112 and the cylindrical body 114 are integrally formed, and the elastic wings 120a, 120b are embedded in the cylindrical body 114, and the elastic wings 120a, 120b ) is formed with a slip straight guide portion (E), which is moved by the extended development force (F) of the tension member 300, and the wing tips 122 of the elastic wings 120a and 120b built into the cylindrical body 114. Wing outflow grooves 1144a and 1144b flowing out into the ground at the top and adjustment wire insertion grooves 1146a and 1146b through which the elastic wing restraint adjustment wires 130a and 130b are inserted are formed, and at this time, the elastic wings ( The shape of 120a) (120b) is a flat fastening part 126 having a fastening groove 1262, an outwardly curved wing part 1224 integrally close to a vertical shape, and an insertion hole 1222 on the extension line It has a shape consisting of the formed wing tip 122, and the wing fixing spiral portion 312 of the tension member 300 is inserted into the fastening groove 1262 of the plane fastening portion 126 and is integrally fixed with the tension member 300, At the same time, the elastic wing restraining adjustment wires 130a, 130b penetrating the adjustment wire insertion grooves 1146a, 1146b are inserted and fixed into the insertion hole 1222 of the tip 122 of the wing symmetrical on both sides, while the tension member 300 ), the elastic wings 120a and 120b flow out into the ground through the wing outflow grooves 1144a and 1144b while the elastic wings move along the slip straight guide portion E by the expansion force F of ), and at the same time the design confirmation is confirmed. The opening angle (θ) is made, and at the same time, a tight restraint tension force (T) is introduced to the elastic wing restraint adjustment wire (130a) (130b) of the design length (d), and in this state, the elastic wing friction stop point (f) Elastic wing suppression adjustment wire fastened to the tip 122 of the wing of the design expansion angle (θ) while the elastic wing (120a) (120b), which has been expanded outflow throughout the inside and outside, forms a hook fixed form with respect to the friction stop point (f) ( The restraint tension force (contraction force) (T) by 130a) (130b) acts on the tip of the wing 122 and retracts it, resulting in a more robust hook-fixed underground head anchor structure (AC), and this structure (AC ) resists the vehicle impact load (S), but the expanded elastic wing is not bent back or deformed, and the design expansion angle (θ) is maintained as it is, characterized in that the behavior resistance is supported integrally against the external force (S) Underground anchor system that reinforces the bearing capacity of the prop According to claim 4
The slip straight guide portion (E) is formed in the cylindrical body 114 of the anchor head case 110, and the elastic wings 120a and 120b are concealed in the slip straight guide portion E, and at this time, the elastic wings 120a ( The plane fastening part 126 of 120b) is placed under the slip straight guide part E, and the wing tip 122 is placed in the wing outflow grooves 1144a and 1144b of the anchor head case 110 on the upper part, In this state, when the extended development force (F) is applied to the tension member 300, the elastic blades 120a and 120b move along the slip straight guide portion E, and the upper wing tip 122 moves through the wing outflow groove 1144a ) (1144b), and at the same time, the tight restraint tension (T) is introduced into the elastic wing restraint adjustment wire (130a) (130b) of the design length (d), and the elastic wing (120a) (120b) is also designed While reaching the opening angle (θ), the elastic blade restraint adjustment wire (130a) (130b) into which the tight restraint tension (T) is introduced, and the elastic blade (120a) (120b) having the design expansion angle (θ) An underground anchor system that reinforces the bearing capacity of the support, characterized in that the resistance support against the external force (S) is made by this operating relationship by having an integral operating relationship through the anchor head case 110 According to claim 4
In the expansion movement distance of the elastic wing, the elastic wing passes through the slip straight guide portion (E) where the ground friction resistance does not reach, and then gradually expands from the tip 122 of the elastic wing to the ground, in a state where the ground friction resistance distance is minimized Underground anchor system that reinforces the bearing capacity of the support, characterized in that the underground expansion of the elastic wing is performed smoothly The underground anchor and the ground extension line of the tension member integrally formed and connected thereto are fixed to the guardrail support, and the support force reinforcement method for reinforcing the support capacity of the support against the vehicle impact load transmitted through the tension member

(a) In the structural shape of the anchor head case 110, the elastic wings 120a, 120b, the tension member 300, the driving support 200, and the driving plate 400, the structure of the anchor head case 110 has a conical tip ( 112) and the cylindrical body 114 are integrally formed, but the wing outflow grooves 1144a, 1144b and the adjustment wire insertion grooves 1146a, 1146b are formed in the cylindrical body 114, and the wing outflow grooves 1144a, 1144b are formed. ) And the inside of the cylindrical body 114 between the conical tip 112, a slip straight guide portion E of a certain length is formed, and the adjusting wire insertion grooves 1146a and 1146b are longer than the wing outlet grooves 1144a and 1144b. Located above, the structure of the elastic wings (120a) (120b) is integrally formed with a flat fastening part 126 and two symmetrical wing parts 1224, and the two wing parts 1224 are flat fastening part 126 It is close to vertical with respect to the wing tip 122 and is bent outward more and more, and the structure of the driving support 200 has a connection assembly part 216 at the top of the hollow shape, and a slide part 212 and a stop support at the bottom ( 214) are integrally formed, while fabricating them all;

(b) The wing fixing spiral part 312 of the tension member 300 is inserted into the insertion hole 1222 of the flat fastening part 126, and the elastic wings 120a, 120b integrally fastened and fixed are attached to the anchor head case 110. It is inserted over the slip straight guide part (E) in the cylindrical body 114, but the wing tips 122 of the elastic wings 120a, 120b slightly protrude into the wing outflow grooves 1144a, 1144b, and adjusted in this state. Insert both ends of the design length (d) of the elastic blade restraint adjustment wire (130a) (130b) passing through the wire insertion groove (1146a) (1146b) into the insertion hole of the wing tip 122 of the elastic blade (120a) (120b). After inserting and fixing in 1222, the long extension line of the tension member 300 is inserted into the hollow part of the driving support 200 and protrudes above the connection assembly part 216, and in this state is supported by the connection assembly part 216 The washer fixing nut 217 is spirally fixed to the post fixing spiral portion 314 of the protruding tension member 300, and the driving plate 400 is assembled thereon, and at this time, the end of the protruding tension member 300 is Assembling an underground driving penetration structure in which elastic wings are completely concealed by assembling so as not to deviate from the driving surface 416 of (400);

(c) striking the driving surface (416) of the underground driving penetration structure in which the elastic wings assembled in step (b) are completely concealed to penetrate the ground;

⒟ In the underground driving penetration structure in which the underground penetration is completed and the elastic wing is completely concealed, the driving plate 400 and the washer fixing nut 217 are disassembled and removed, and the elastic wing (F) is applied to the free end of the tension member 300 to 120a) (120b) is expanded into the ground through the wing outflow grooves (1144a) (1144b), and at the same time, a tight restraint tension (T) is introduced into the elastic wing restraint adjustment wire (130a) (130b) of the design length (d). The step of forming the “underground head anchor structure (AC) + driving support 200” having the design angle θ on the elastic wings 120a and 120b:

⒠ Slide the driving support 200 from the “underground head anchor structure (AC) + driving support 200” in step ⒟ above, Removing it from the ground so that only the "head anchor structure (AC) in the ground" remains in the ground;

(c) fastening and fixing the ground extension line of the tension member 300 to the fastening support iron piece 600 of the support; A step of fastening and fixing the holding fixing spiral portion 314 of the ground tension member 300 of the "underground head anchor structure (AC)" in step (C) to the fastening support iron piece 600 of the post (P); Guardrail holding support reinforcement method using an underground head anchor structure (AC)

According to claim 7
After removing the driving support 200 from the ground in step C, a single pipe having a length of 15 to 35 cm is inserted into the hole made by the driving support 200, and the tension member 300 penetrates the single pipe, and the installation position of the single pipe Guardrail holding capacity reinforcement method using an underground head anchor structure (AC), characterized in that it comprises the step of being located from the ground surface to the depth of its length According to claim 7
In the case where two "underground head anchor structures (AC) + tension member 300" in step (a) are constructed in the ground, the two tension members 300 extending to the ground are attached to the guardrail support (P). In fixing to, the fastening supporting iron piece 600 has a structure in which the semicircular iron piece 620 and the straight fastening part 622 having the tension member fastening hole 6224 are integrally formed on both sides, while the guardrail support (P ), the half of the support is wrapped by a semicircular iron piece 620 structure, and at this time, two extension members 300 are inserted into the tension member fastening holes 6224 of the straight fastening part 622, respectively, and fastened and fixed. Guardrail holding support reinforcement method using an underground head anchor structure (AC), characterized in that it comprises the step of doing


According to claim 7
When one "underground head anchor structure (AC) + tension member 300" in step (a) is constructed in the ground, one tension member 300 extended to the ground is interposed between an eye bolt 616 and a U bolt 614. In fixing to the structure of the arc-shaped iron piece 610 of the guardrail post P, this structure consists of the arc-shaped iron piece 610 and the straight fastening part 612 having the U-bolt fastening hole 6122 integrally On the other hand, the front end of the tension member 300 is fastened with the eye bolt 616, the U bolt 614 is connected to the eye bolt 616, and the U bolt branch portion 6142 is the guardrail post (P) Guardrail holding support reinforcement method using an underground head anchor structure (AC), characterized by the step of inserting and fixing the arc-shaped iron piece 610 wrapped around the U bolt fastening hole 6122 of the straight fastening part 612

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