KR102604881B1 - 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

In the present invention, the elastic wing passes through the straight length (E1) of the slip straight guide portion (E) where the ground friction resistance does not reach, and then gradually expands into the ground from the tip portion 122 of the elastic wing, thereby minimizing the ground friction resistance distance. It not only ensures that the underground expansion of the elastic wing is efficient and smooth, but also has an assembly structure that allows adjustment of the expansion angle of the elastic wing and the length of the elastic wing suppression adjustment wire, enabling adjustment to suit the design requirements. , the elastic wings inside and outside the elastic wing friction stop point (f) are fixed in a staggered form, and among them, the elastic wing suppression adjustment wires (130a) (130b) are attached to the wing tip 122 that flows out to the outside. Restraint tension (or contraction force) (T) is applied. By retracting it, an underground head anchor structure (AC) with stronger integral behavior is formed to resist and support the vehicle impact load (S). This is an invention that allows the expanded elastic wings of the underground head anchor structure (AC) to maintain and resist the original expanded shape without being bent back or deformed.

Description

Underground head anchor structure (AC) for reinforcing the bearing capacity of a guard rail, an underground anchor system for reinforcing the bearing capacity of a guard rail, and a method for reinforcing the bearing capacity of a guard rail using an underground head anchor structure (AC) {Underground head anchor body for the guard rail post of strengthening bearing power and system and method of strengthening bearing power there}

The present invention relates to an underground head anchor structure (AC) for reinforcing the bearing capacity of a guard rail support, an underground anchor system for reinforcing the bearing capacity of a guard rail, and a method of reinforcing the bearing capacity of a guard rail support using the underground head anchor structure (AC). In other words, the elastic wing passes through the straight length (E1) of the slip straight guide part (E) where the ground friction resistance does not reach, and then gradually expands into the ground from the tip 122 of the elastic wing, thereby minimizing the ground friction resistance distance. It not only ensures that the underground expansion of the elastic wing is efficient and smooth, but also has an assembly structure that allows adjustment of the expansion angle of the elastic wing and the length of the elastic wing suppression adjustment wire, enabling adjustment to suit the design requirements. , the elastic wings inside and outside the elastic wing friction stop point (f) are fixed in a staggered form, and among them, the elastic wing suppression adjustment wires (130a) (130b) are attached to the wing tip 122 that flows out to the outside. Restraint tension (or contraction force) (T) is applied. By retracting it, an underground head anchor structure (AC) with stronger integral behavior is formed to resist and support the vehicle impact load (S). This is an invention that allows the expanded elastic wings of the underground head anchor structure (AC) to maintain and resist the original expanded shape without being bent back or deformed.

A guardrail is a structure installed to prevent falls in the event of a traffic accident, and at the same time prevent secondary damage from falls and prevent the lives of passengers from being fatal.

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

Generally, about 1.5m of the guardrail support is embedded in the ground soil, and about 0.7m is installed exposed to the ground surface. The impact load (external force) of a moving vehicle is counteracted by the reaction force (horizontal bearing capacity) of the ground (soil) against a support 1.5m above the ground. The support of 0.7m above the ground prevents the vehicle from running away and falling.

The Ministry of Land, Infrastructure and Transport stipulates standards for the support capacity of guardrails.

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

According to this regulation, the standard bearing capacity (horizontal bearing capacity) of the guardrail in the road section on flat ground is 45KN, and the bearing capacity in the road section on embankment is 40.5KN, which is 90% of the standard (45KN) in flat section. Horizontal bearing capacity measurement value If is below the standard value, it is stipulated that the bearing capacity must be strengthened. Here, the horizontal bearing capacity of the strut refers to the maximum horizontal bearing capacity that appears within 35cm of the allowable value of the prop being pushed from the ground.

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

Several reinforcement methods have been proposed to reinforce the support capacity of guardrails.

Here, since the present invention relates to a wing underground anchor, we will look at the problems only with respect to the prior art regarding the wing underground anchor method.

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

The conventional underground wing anchor type underground anchor (100) for reinforcing guardrail supports is composed of a wedge member (110), a driving bar (120), and an anchor pipe (130).

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

Figure 1c shows that after removing the driving bar 120 from the underground anchor 100 for reinforcing the guardrail support of Figure 1a, the pipe branch 131 wings are extended through the opening portion 112 of the wedge member 110 in this state. As a state diagram showing the unfolded shape, it can be seen that the “umbrella-shaped anchor blade” forms one body with the anchor pipe 130.

Figure 1d is a state diagram showing the state in which the anchor pipe 130, which is one body with the "umbrella-shaped anchor blade" of Figure 1c, is connected and fixed to the guardrail support 10, and shows the vehicle impact load (S) transmitted by moving the anchor pipe 130. ; external force) is shown to be resisted and supported by the “umbrella-shaped anchor blades.”

Now, let's look at the problems with the underground expansion of the "umbrella-shaped anchor blade", focusing on Figure 1c.

First, while the underground anchor 100 for reinforcing the guardrail support of Figure 1a is penetrated into the ground, the pipe branch 131 of Figure 1c is unfolded in the ground.

The driving rod (120) must first be removed from the underground anchor (100) for reinforcing the underground guardrail support. Only by removing the driving bar 120 can the pipe branch 131 and the anchor pipe 130, which is one body, move freely. As the freed pipe branch 131 moves downward, its wings spread through the opening portion 112.

However, the wedge member 110 of Figure 1c, from which the driving rod 120 has been removed, has no support means. The wedge member 110, which has no support means, is in a floating state alone. Although the downwardly moving anchor pipe 130 must pass through the opening portion 112 of the wedge member 110 to unfold the pipe branch 131 wings, the anchor pipe 130 is When moving downward, the wedge member 110 is also moved downward along with the downward movement, so there is a problem in that the wings of the pipe branch 131, which cannot pass through the opening portion 112, are not spread.

Second, even if the wings of the pipe branch 131 are spread like an “umbrella shape,” as long as the opening of the wings depends solely on the slope of the opening 112 of the wedge member 110, the opening angle of the wings and the Unfolded length adjustment has its limitations. This is because the means of adjustment are nowhere to be found. 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 opening portion 112 and pipe branch 131 of the wedge member 110 in Figure 1c, so the optimization design is not possible. From this point of view, there are inefficient and uneconomical problems.

Third, when the “umbrella-shaped” pipe branch 131 wings resist and support the vehicle impact load (S; external force) transmitted through the anchor pipe 130, the pipe branch 131 wings move backward against the external force (S). Since the structure does not have a means to prevent tilting, the wing is easily tilted back, causing a problem in that the anchor force of the pipe branch 131 wing is lost while resisting the external force (S).

In the present invention, the elastic wings (120a) (120b) are hidden and embedded in the anchor head case (110) in which the slip straight guide portion (E) is formed, and driven into the ground, and in this state, the expansion force (F) of the tension member (300) is driven into the ground. ) is applied, the elastic wings (120a) (120b) are moved along the slip straight guide part (E) where the ground friction resistance does not apply, and at the same time, the wing tip flows out into the ground through the wing outflow groove of the slip straight guide part (E) Leads the expansion trajectory, and at this time, the leading expansion trajectory flows out through the slip straight guide part (E) where the ground friction resistance does not apply, so not only is the underground expansion by elasticity smooth and easy, but the elastic wings that follow it are also smooth in the same way. The elastic wing suppression adjustment wires (130a) (130b) are expanded and the ground friction resistance is minimized when the elastic wings are expanded by this slip straight guide part (E), while the elastic wing suppression adjustment wires (130a) (130b) of the design length (d) with the restraining tension (T) introduced. First, by forming an underground head anchor structure (AC) that has an organic operating relationship with the elastic wings that have reached the design expansion angle (θ), first, the elastic wings inside and outside the elastic wing friction stop point (f) are in a staggered form. It has a hook fixation form, and the suppressing tension (or contractile force) (T) of the elastic blade suppression adjustment wires (130a) (130b) acts on the wing tip portion (122) that flows out to the outside. By causing it to retract, the hook It is easy to form an underground head anchor structure (AC) of integral behavior with stronger fixation, and secondly, not only is it possible to adjust the design length (d) of the elastic wing suppression adjustment wires (130a) (130b), This makes it possible to adjust the design expansion angle (θ) of the elastic wing, making it possible to assemble an efficient and economical underground head anchor structure (AC). Third, the straight line of the slip straight guide part (E) where the elastic wing does not have ground friction resistance is possible. After passing the length E1, the elastic wing is gradually expanded into the ground from the tip 122, so that the elastic wing is efficiently and smoothly expanded underground while the ground friction resistance distance is minimized. Fourth, the assembled wing in this way is The underground head anchor structure (AC) itself resists and supports the external force of the vehicle impact load (S), but the expanded elastic wings do not bend back or deform against the external force (S), and the design expansion angle (θ) is maintained as is. The purpose is to provide an underground head anchor structure (AC) that is integrally supported with movement resistance.

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

In the underground anchor structure, an underground anchor and an above-ground extension line of a tension member integrally connected to the anchor are fixed to a guardrail strut, and are intended to reinforce the bearing capacity of the prop against the vehicle impact load transmitted through the tension member.

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

Here,

As it moves along the slip straight guide part (E) by the expansion force (F) applied to the tension member (300), a tight restraining tension (T) is introduced into the elastic wing suppression adjustment wires (130a) (130b) of the design length (d). At the same time, an underground design boundary angle (θ) is formed in the elastic wings (120a) (120b), and in this state, the design boundary angle (θ) is supported at the elastic wing friction stop point (f) by the tight restraining tension force (T). Not only is the elastic wing (120a) (or 120b) strongly adhered and supported, but also the elastic wing ( As 120a) (or 120b) and the anchor head case 110 become hook-fixed in a cross-shaped shape, the elastic wings 120a (120b) are formed through the anchor head case 110 at the elastic wing friction stop point f. ) and the elastic wing suppression adjustment wires (130a) (130b) are an underground head anchor structure (AC) for reinforcing the bearing capacity of the guardrail, which is characterized by forming a single organism.

also,

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

Second, the configuration of the underground anchor system that reinforces the bearing capacity of the support of the present invention will be described as follows.

In the underground anchor system, an underground anchor and an above-ground extension line of a tension member integrally connected to the anchor are fixed to a guardrail strut, and are used to reinforce the bearing capacity of the prop against the vehicle impact load transmitted through the tension member.

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

Here,

The slip straight guide part (E) is formed in the cylindrical body 114 of the anchor head case 110, and the elastic wings (120a) (120b) are concealed in the slip straight guide part (E). At this time, the elastic wings (120a) ( The flat fastening part 126 of 120b) is placed at the lower part of the slip straight guide part (E), and the wing tip part 122 is placed on the upper part of the wing outlet groove (1144a) (1144b) of the anchor head case 110, In this state, when the expansion force (F) is applied to the tension member 300, the elastic wings (120a) (120b) move along the slip straight guide portion (E) and the upper wing tip 122 is formed into the wing outflow groove 1144a. ) The outflow is expanded through (1144b), and along with this, a tight restraining tension (T) is introduced into the elastic blade suppression adjustment wires (130a) (130b) of the design length (d), and at the same time, the elastic blades (120a) (120b) are also designed. While reaching the expansion angle (θ), elastic wing suppression adjustment wires (130a) (130b) to which a tight restraining tension (T) is introduced, and elastic wings (120a) (120b) having a design expansion angle (θ) It is an underground anchor system that reinforces the supporting force of the support, characterized in that an organic operating relationship is formed through the anchor head case 110, and resistance to external force (S) is supported by this operating relationship.

also,

In the expansion movement distance of the elastic wing, the elastic wing passes through the slip straight guide part (E) where the ground friction resistance does not reach, and then gradually expands into the ground from the tip 122 of the elastic wing, so that the ground friction resistance distance is minimized. It is an underground anchor system that reinforces the bearing capacity of supports, characterized by smooth underground expansion of elastic wings.

In the present invention, the elastic wing passes through the straight length (E1) of the slip straight guide portion (E) where the ground friction resistance does not reach, and then gradually expands into the ground from the tip portion 122 of the elastic wing, thereby minimizing the ground friction resistance distance. Not only does it have the effect of efficiently and smoothly expanding the elastic wing underground, but it also has an assembly structure that allows adjustment of the expansion angle of the elastic wing and the length of the elastic wing suppression adjustment wire, so that it can be adjusted to suit the design requirements. In addition, the elastic wings inside and outside the elastic wing friction stop point (f) are fixed in a staggered hook form, and among them, the elastic wing suppression adjustment wires (130a) (130b) are attached to the wing tip 122 that flows out to the outside. )'s suppressing tension (or contraction force) (T) acts. By retracting it, an underground head anchor structure (AC) with stronger integral behavior is formed, which resists the vehicle impact load (S). 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 initial expanded shape without bending back or deforming when supporting.

[Figure 1a] Combined cross-sectional perspective view of the underground anchor (100) for reinforcing guardrail supports of the prior art
[Figure 1b] An exploded cross-sectional view of the underground anchor 100 for reinforcing the guardrail support of Figure 1a
[Figure 1c] After removing the driving bar 120 from the underground anchor 100 for reinforcing the guardrail support of Figure 1a, in this state, the pipe branch 131 wing is inserted through the opening 112 of the wedge member 110. The state appears to be unfolding in the shape of an umbrella.
[Figure 1d] A state diagram showing the state in which the anchor pipe 130, which is one body with the "umbrella-shaped anchor blade" of Figure 1c, is connected and fixed to the guardrail support 10.
[Figure 2a] Cross-sectional perspective view of the “driving anchor structure” of the ground assembly work for underground driving penetration of the present invention
[Figure 2b] Exploded cross-sectional view of Figure 2a
[Figure 2c] Disassembled and combined cross-sectional view showing the driving plate and washer fixing nut removed in Figure 2a
[Figure 2d] Cross-sectional view showing the shape of the tension member, which is a component of the “driving anchor structure” of the present invention
[Figure 2e] Cross-sectional view showing the shape of the anchor case, which is a component of the “driving anchor structure” of the present invention
[Figure 2f] Perspective view of the elastic wing, which is a component of the “driving anchor structure” of the present invention
[Figure 2g] Perspective view of the washer fixing nut, which is a component of the “driving anchor structure” of the present invention
[Figure 3a] A state diagram showing the "driving penetration anchor structure" of Figure 2a positioned on the ground surface in preparation for underground driving penetration.
[Figure 3b] A state diagram showing the "driving anchor structure" of Figure 3a being penetrated into the ground.
[Figure 3c] After removing the driving plate and washer fixing nut in the "drive penetration anchor structure" of Figure 3b, connect the connecting pull-out rod to the tension member and apply expansion pull-out force (F) to open the elastic wing and elastic wing suppression adjustment wire. State diagram showing the expanded underground head anchor structure (AC) formed.
[Figure 4] State diagram specifically expressing the underground head anchor structure (AC) of Figure 3c
[Figure 5a] A state diagram showing the state in which the tension member of the underground head anchor structure (AC) of Figure 4 and the fastening support steel piece of the support are fastened and fixed.
[Figure 5b] A plan view showing the two underground head anchor structures (AC) of Figure 5a fastened to the semicircular iron pieces of the supports.
[Figure 5c] Plan view showing one underground head anchor structure (AC) of Figure 5a fastened to the circular iron piece of the support.

The present invention will be described in detail with the accompanying drawings as follows.

The underground head anchor structure (AC) for reinforcing the bearing capacity of the guardrail is an underground structure composed of the reference number 100 (head anchor) in Figure 5a and the reference number 300 (tension member), which is an extension thereof, and is transmitted through the tension member 300. 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 Figure 4 includes a tension member 300, elastic wings 120a and 120b of the design spread angle θ, and elastic wing suppression adjustment wires 130a and 130b of the design length d. ) is a designed underground head anchor structure (AC) composed of ).

At this time, the restraining contraction tension (T) is introduced into the elastic wing suppression adjustment wires (130a) (130b) of the design length (d) by the expansion force (F) of the tension member (300), and the elastic wing (120a) (120b) is introduced. A design boundary angle (θ) is formed. In addition, in this state, the elastic wings inside and outside the elastic wing friction stop point (f) form a staggered hook fixation form, and among them, the elastic wing suppression adjustment wire 130a (130a) is attached to the wing tip 122 that flows out to the outside. The restraining tension (or contraction force) (T) of 130b) acts and causes it to retract, thereby forming an underground head anchor structure (AC) with integral behavior whose hook-type fixation becomes stronger.

In this way, the designed underground head anchor structure (AC) is buried in the ground as shown in Figure 5a and resists and supports the vehicle impact load (S) as is.

However, in the designed underground head anchor structure (AC), as shown in Figure 4, the elastic wing suppression adjustment wires (130a) (130b) into which the restraining tension (T) is introduced are wide open, and the elastic wings (120a) (120b) are also wide open. Therefore, it is impossible for the designed underground head anchor structure (AC) to be driven into the ground as is. This is because the unfolded elastic wings and elastic wing suppression adjustment wires (130a) (130b) are damaged due to ground friction resistance during penetration.

Instead of the underground head anchor structure (AC), the underground penetration is done using the “drive penetration anchor structure” shown in Figure 3a, which minimizes underground friction resistance. The “driving anchor structure” is a structure in which a driving support (200), a driving plate (400), and a washer fixing nut (217) are further added to the underground head anchor structure (AC) of Figure 4. The added configuration is only related to underground penetration. While the “driving anchor structure” is “ground assembly work,” the underground head anchor structure (AC) is an “underground operation work” with the “driving anchor structure” of underground penetration as the preceding structure. At this time, the connection assembly of the anchor head case 110 and the driving support 200 of the “driving anchor structure” of Figure 3a is a slide method. The tension member 300 is a fixing member that secures 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 is fixed to the washer fixing nut 217 supported on the assembly connection part 216. The connection assembly portion of the anchor head case 110 and the driving support 200 is located between the upper and lower fixings. Since the connection assembly is fixed by the tension members 300 for fixing the upper and lower ends, the same fixation is achieved only by slide assembly without separate fixing (screw coupling, etc.). This is why the slide portion 212 of the driving support 200 is slide-inserted into the anchor head case 110. The slide method has the advantage that not only is it easy to insert and assemble the anchor head case 110 of the driving support 200, but it is also easy to remove the driving support 200 after penetration.

In a state in which the preceding structure is penetrated into the ground, the elastic wings 120a (120a) and the elastic wing suppression adjustment wire 130a ( 130b) opens wide.

The conversion process from the preceding structure's "diving anchor structure" to the underground head anchor structure (AC) consists of three processes. This is explained as follows.

[Course 1] Geologic penetration course

The “driving anchor structure” of the ground assembly is shown in Figure 3a.

The first process is the process of penetrating the “driving anchor structure” of Figure 3a into the ground as shown in Figure 3b. The elastic wings 120a and 120b of Figure 3b are hidden within the slip straight guide portion E of the anchor head case 110. The elastic wing suppression adjustment wires 130a and 130b are also in a state where no restraining tension (T) has been introduced.

[Course 2] Underground elastic wing expansion process

The second process is a process in which the hidden elastic wings 120a and 120b and the elastic wing suppression adjustment wires 130a and 130b are fully expanded by the expansion force F of the tension member 300, as shown in Figure 3c. In order to apply the expansion force (F) to the tension member 300 in Figure 3c, the driving plate 400 and washer fixing nut 217 in Figure 3b must be removed (see Figure 2c).

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

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

The third process slides the driving support 200 from the anchor head case 110 in Figure 3c of the second process in which the elastic wings 120a and 120b and the elastic wing suppression adjustment wires 130a and 130b are wide open. This is the process of removing it from the ground. The underground head anchor structure (AC) of Figure 4 is from which the driving support 200 has been removed. The underground head anchor structure (AC) is a structure converted from the “diving anchor structure”.

Now, the configuration and assembly of the “driving anchor structure” of the ground assembly, and the technical features of the underground head anchor structure (AC) will be explained.

First, the configuration and assembly of the “driving anchor structure” will be explained with reference to Figure 3a as follows.

The “driving anchor structure” is fastened to the anchor head case (110), elastic wings (120a) (120b) completely concealed within the slip straight guide portion (E), and a pair of wing tip portions (122), thereby expanding the range. It is composed of elastic wing suppression adjustment wires 130a and 130b that adjust, and a tension member 300 spirally coupled to the flat fastening portion 126 of the elastic wings 120a and 120b.

To put this more specifically, a slip straight guide portion (E) is formed in the cylindrical body 114 of the anchor head case 110, wing outlet grooves 1144a and 1144b are formed at the top thereof, and wing tip portion 122 ) are located in the wing outflow grooves (1144a) (1144b), and the flat fastening portions 126 of the elastic wings (120a) (120b) are located at the bottom of the wing outlet grooves (1144a) (1144b). Adjustment wire insertion grooves (1146a) (1146b) are formed on the top, and both ends of the elastic wing suppression adjustment wires (130a) (130b) penetrate the adjustment wire insertion grooves (1146a) (1146b) to form a pair of wing tip portions (122). Each is inserted and fixed into the insertion hole 1222.

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

In this way, in a state in which the "driving anchor structure" with minimized ground friction resistance of Figure 3a is penetrated into the ground, the elastic wings and the elastic wing suppression adjustment wires 130a and 130b are formed by the expansion force (F) of the tension member 300. It unfolds.

Next, the configuration of the underground head anchor structure (AC), which is a conversion structure of the “driving anchor structure”, is explained as follows.

As shown in Figure 4, the underground head anchor structure (AC) has elastic wings and elastic wing suppression adjustment wires (130a) (130b) widened by the expansion force (F) of the tension member (300) and the driving support (200) is This configuration has been removed. The tension member 300 of the underground head anchor structure (AC) of FIG. 4 is fastened and fixed to the fastening support steel piece 600 of the strut (P) to resist and support the vehicle impact load (S).

Next, the technical features of the underground head anchor structure (AC) are explained as follows.

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

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

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

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

However, after the elastic wing passes through the straight length (E1) of the slip straight guide part (E) where the ground friction resistance does not reach, it is gradually expanded underground from the tip 122 of the elastic wing, so that the elastic wing is elastic with the ground friction resistance distance minimized. It has the characteristics of efficient and smooth expansion of the wings.

According to Figure 4, the length of the slip straight guide portion (E) is a1-a2 and b1-b2. Since the elastic wings are completely hidden within the slip straight guide part (E), the length of the expanded elastic wings and the length of the slip straight guide part (E) are the same.

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

The underground head anchor structure (AC) is a structure in which the anchor head case 110, elastic wings, and elastic wing suppression adjustment wires (130a) (130b) are assembled, so the length of the elastic blade suppression adjustment wires (130a) (130b) is adjusted. And, the expansion angle (θ) of the elastic wing can be adjusted and at the same time, it has the characteristics of easy assembly.

In addition, by adjusting the length of the elastic wing suppression adjustment wires 130a and 130b to the design length (d) due to the assembly characteristics, not only is it possible to adjust the design expansion angle (θ) of the elastic wing, but also it is efficient due to these design values. It has the design and assembly characteristics of an economically optimized underground head anchor structure (AC).

Third, about the technical characteristics of the hook fixation form by elastic wings inside and outside the elastic wing friction stop point (f) of the anchor head case 110.

The elastic wings inside and outside the elastic wing friction stop point (f) form a staggered hook fixation form, and among them, the elastic wing suppression adjustment wires 130a and 130b are suppressed at the wing tip 122 that flows out to the outside. Tension force (or contraction force) (T) acts and causes it to retract, so that the hook-type fixation has the characteristics of an underground head anchor structure (AC) with stronger integrated behavior. At this time, the restraining tension (T) of the elastic wing suppression adjustment wires (130a) (130b) acts as a contractile force with respect to the elastic blades (120a) (120b).

In addition, when the underground head anchor structure (AC) with integral behavior by the hook fixation type resists and supports the vehicle impact load (S), the expanded elastic wings of the underground head anchor structure (AC) are expanded without being bent back or deformed. It maintains its shape and has resistance-supporting characteristics.

Meanwhile, the connection between the tension member 300 of the underground head anchor structure (AC) and the fastening support steel piece 600 of the support pole (P) will be described as follows.

As the tension member 300 of the underground head anchor structure (AC) is fixed to the fastening support steel piece 600 of the prop (P), the vehicle impact load (S) transmitted through the tension member 300 is applied to the underground head anchor structure (AC). Resistance is supported by (Figure 5a sinking).

The form of the fastening support iron piece 600 fastened to the post P includes, for example, a semicircular 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 steel piece (620) surrounds half of the support (P), and the tension members (300) of each underground head anchor structure (AC) are inserted into the tension member fastening holes (6224) on both sides of the straight fastening portion (622) of the steel piece. It is concluded. The semicircular iron piece 620 is used to connect and fix 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 shape, as shown in FIG. 5C. The tension member 300 of the underground head anchor structure (AC) and the eye bolt 616 are fastened, and the U bolt 614 is connected to the eye bolt 616. In this state, the U bolt branch portion 6142 is inserted and fastened into the U bolt fastening hole 6122 of the straight fastening portion 612 of the arc-shaped iron piece 610 surrounding the support (P). The arc-shaped iron piece 610 is used to connect and fix one underground head anchor structure (AC). At this time, the arc- shaped iron piece 610 preferably has an 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 pole (P), the shape of the underground head anchor structure (AC) unfolded in Figure 4 is maintained as is.

At this time, it is desirable 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 occupants due to the reaction of the vehicle impact load (S).

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

An underground anchor and an above-ground extension line of a tension member integrally connected to the anchor are fixed to a guardrail support, and a method of reinforcing the support of the support to reinforce the support of the support against the vehicle impact load transmitted through the tension member.

⒜ In terms of the structural shape of the anchor head case 110, the elastic wings 120a and 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 formed as one body, and wing outlet grooves 1144a (1144b) and adjustment wire insertion grooves 1146a (1146b) are formed in the cylindrical body 114, and wing outlet grooves 1144a (1144b) are formed. ) and the conical tip 112, a slip straight guide portion (E) of a certain length is formed inside the cylindrical body 114, and the adjustment wire insertion grooves 1146a and 1146b are longer than the wing outflow grooves 1144a and 1144b. Located above, the structure of the elastic wings (120a) (120b) is formed by integrally forming a plane fastening portion (126) and two symmetrical wings (1224), and the two wings (1224) are connected to the plane fastening portion (126). It is close to vertical and curves outward as it goes toward the wing tip 122, and the structure of the driving support 200 has a connection assembly 216 at the upper part of the hollow shape, and a slide part 212 and a stop support at the lower part ( 214) are formed integrally, while manufacturing them all;

⒝ 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 and 120b, which are integrally fastened and fixed, are connected to the anchor head case 110. Insert across the slip straight guide part (E) in the cylindrical body 114, but make the wing tips 122 of the elastic wings 120a and 120b slightly protrude into the wing outflow grooves 1144a and 1144b, and adjust in this state. Both ends of the design length d of the elastic wing suppression adjustment wires 130a and 130b that pass through the wire insertion grooves 1146a and 1146b are inserted into the insertion holes of the blade tip portions 122 of the elastic wings 120a and 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 onto the connection assembly 216, and the protruding tension member 300 is fixed to the support. The spiral portion 314 is spirally fixed by a washer fixing nut 217 supported on the connection assembly 216, and a driving plate 400 is assembled thereon. At this time, the end of the protruding tension member 300 is driven. Assembling an underground driving penetration structure in which the elastic blades are completely concealed by assembling so as not to deviate from the driving surface 416 of the plate 400;

⒞ A step of striking the driving surface 416 of the underground driving penetration structure in which the elastic blade assembled in step ⒝ above is completely concealed and penetrating it into the ground;

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

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

⒡ A step of fastening and fixing the strut fixing spiral portion 314 of the ground tension member 300 of the “underground head anchor structure (AC)” of step ⒠ to the fastening support iron piece 600 of the strut (P). It is a guardrail support strengthening method using an underground head anchor structure (AC).

Here,

In step ⒠, the driving support 200 is removed from the ground, and then a 15 to 35 cm long single pipe (small steel pipe) is inserted into the hole opened by the driving support 200, and the tension member 300 penetrates the single pipe, This is a guardrail support strengthening method using an underground head anchor structure (AC), which includes the step of installing the single pipe from the ground surface to the depth of its length.

In addition, when two “underground head anchor structures (AC) + tension members 300” in step ⒠ are constructed underground, the two tension members 300 extending to the ground are connected to the fastening support iron pieces (P) of the guardrail struts (P). When fixing to 600, the fastening support steel piece 600 has a structure in which a semicircular steel piece 620 and a straight fastening part 622 having tension member fastening holes 6224 are integrated on both sides, while the guardrail support With respect to (P), half of the support is surrounded by a semicircular iron piece 620 structure, and at this time, two extended tension members 300 are respectively inserted into the tension member fastening hole 6224 of the straight fastening portion 622. It is a guardrail support bearing capacity reinforcement method using an underground head anchor structure (AC), which includes the step of fastening.

Not only that,

When the “underground head anchor structure (AC) + tension member 300” in step ⒠ above is constructed in the ground, one tension member 300 extending to the ground is inserted through an eye bolt 616 and a U bolt 614. When fixing to the arc-shaped steel piece 610 structure of the guardrail support (P), this structure consists of the arc-shaped steel piece 610 and the straight fastening portion 612 having the U bolt fastening hole 6122. Meanwhile, the tip of the tension member 300 is fastened to the eye bolt 616, the U bolt 614 is connected to the eye bolt 616, and the U bolt branch portion 6142 is connected to the guardrail support (P). This is a guardrail support strength reinforcement method using an underground head anchor structure (AC), which is characterized by the step of inserting and fastening the arc-shaped iron piece 610 into the U bolt fastening hole 6122 of the straight fastening portion 612.

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

In summary, the elastic wing protrudes and expands through the anchor head case 110 due to the design expansion force (F) of ground work, reaching the design expansion angle, but even if a force greater than the design expansion force (F) corresponding to the design expansion angle is applied. Even if it is possible, the design expansion angle is accurately achieved in the ground by the design length (d) of the elastic blade suppression adjustment wires (130a) (130b), so that the anchor force of the “underground head anchor body (AC)” in the ground that cannot be seen with the eye Not only is the support design value clearly introduced and reflected, but the conversion to an “underground head anchor (AC)” is simple and easy, making it efficient and economical. In addition, it should be noted that the configuration of the "underground head anchor body (AC)" of the present invention and its underground anchor system are technologies that are applied to ground anchors as long as the same conditions and the same functions are performed, and their interpretation is also the same.

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 guide section (E), 1144a, 1144b; Wing outflow grooves, 1146a, 1146b; Adjustment wire insertion groove, f; Elastic wing friction stop point (f),
120a, 120b; elastic wings, 122; Wing tip (122), 1222; foramen insertion, 124; wings, 126; Plane fastening part (126), 1262; fastening groove, 126b; fastening nut,
130a, 130b; Elastic wing suppression adjustment wire, 132; Adjustment wire end,
200; driving support (200), 212; slide section, 214; stop support, 216; Connection assembly (216), 217; Washer fixing nut (217)
300; Tension member (or tension round bar), 312; wing anchor helix, 314; strut fixation spiral, 316; Shock reaction control unit, 317; connecting rod (317),
400; Hantapan, 412; connection joint, 4122; driving support, 414; tension reinsertion hole, 416; Hangta-myeon (416),
600; Fastening support iron piece (600), 610; Arc-shaped iron piece (610), 612; Straight fastening portion (612), 6122; U bolt fastener (6122), 614; U bolt, 6142; U bolt branch (6142), 616; eyebolt, 620; Semicircular iron piece (620), 622; Straight fastening portion (622), 6224; Tension member fastener (6224),

Claims (10)

In the underground head anchor structure, the ground part of the tension member integrally connected to the head anchor 100 is fixed to the guardrail support, and is used to reinforce the guardrail support against the vehicle impact load transmitted through the tension member.
The anchor head case 110 has a conical tip 112 and a cylindrical body 114 integrally formed, and elastic wings 120a and 120b are built into the cylindrical body 114 and the elastic wings 120a and 120b are built into the anchor head case 110. ) is formed by a slip straight guide portion (E) that is moved by the expansion force (F) of the tension member (300), and the wing tip portion (122) of the elastic wings (120a) (120b) built into the cylindrical body (114) is formed. Wing outflow grooves 1144a and 1144b that flow out into the ground at the top and adjustment wire insertion grooves 1146a and 1146b through which the elastic wing suppression adjustment wires 130a and 130b are inserted are formed, and at this time, the elastic wing ( The shape of 120a) (120b) includes a flat fastening portion 126 having a fastening groove 1262, a wing portion 1224 that is curved outward and close to a vertical shape, and an insertion hole 1222 in its extension line. It has a shape consisting of a formed wing tip portion 122, and the wing fixing spiral portion 312 of the tension member 300 is inserted and fastened 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 suppression adjustment wires 130a and 130b penetrating the adjustment wire insertion grooves 1146a and 1146b are inserted and fixed into the insertion hole 1222 of the wing tip portion 122 that is symmetrical on both sides, while the tension member 300 ), a tight restraining tension force (T) is introduced into the elastic blade suppression adjustment wires 130a and 130b of the design length (d) by the expansion force (F), and at the same time, the underground design expansion force is introduced into the elastic blades 120a and (120b). Underground head anchor structure (AC) for reinforcing the bearing capacity of a guardrail support, characterized by a boundary angle (θ) In paragraph 1
As it moves along the slip straight guide part (E) by the expansion force (F) applied to the tension member (300), a tight restraining tension (T) is introduced into the elastic wing suppression adjustment wires (130a) (130b) of the design length (d). At the same time, an underground design boundary angle (θ) is formed in the elastic wings (120a) (120b), and in this state, the design boundary angle (θ) is supported at the elastic wing friction stop point (f) by the tight restraining tension force (T). Not only is the elastic wing (120a) (or 120b) strongly adhered and supported, but also the elastic wing ( As 120a) (or 120b) and the anchor head case 110 become hook-fixed in a cross-shaped shape, the elastic wings 120a (120b) are formed through the anchor head case 110 at the elastic wing friction stop point f. ) and the elastic wing suppression adjustment wires (130a) (130b) are formed as a single organism. An underground head anchor structure (AC) for reinforcing the bearing capacity of the guardrail. delete In the underground anchor system, the ground portion of the tension member integrally connected to the head anchor 100 is fixed to the guardrail support, and reinforces the support of the support against the vehicle impact load transmitted through the tension member.
The anchor head case 110 has a conical tip 112 and a cylindrical body 114 integrally formed, and elastic wings 120a and 120b are built into the cylindrical body 114 and the elastic wings 120a and 120b are built into the anchor head case 110. ) is formed by a slip straight guide portion (E) that is moved by the expansion force (F) of the tension member (300), and the wing tip portion (122) of the elastic wings (120a) (120b) built into the cylindrical body (114) is formed. Wing outflow grooves 1144a and 1144b that flow out into the ground at the top and adjustment wire insertion grooves 1146a and 1146b through which the elastic wing suppression adjustment wires 130a and 130b are inserted are formed, and at this time, the elastic wing ( The shape of 120a) (120b) includes a flat fastening portion 126 having a fastening groove 1262, a wing portion 1224 that is curved outward and close to a vertical shape, and an insertion hole 1222 in its extension line. It has a shape consisting of a formed wing tip portion 122, and the wing fixing spiral portion 312 of the tension member 300 is inserted and fastened 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 suppression adjustment wires 130a and 130b penetrating the adjustment wire insertion grooves 1146a and 1146b are inserted and fixed into the insertion hole 1222 of the wing tip portion 122 that is symmetrical on both sides, while the tension member 300 As the elastic wings move along the slip straight guide part (E) due to the expansion force (F) of ), the elastic wings (120a) (120b) flow out into the ground through the wing outflow grooves (1144a) (1144b), expanding and expanding the design at the same time. The opening angle (θ) is formed, and along with this, a tight restraining tension (T) is introduced into the elastic blade suppression adjustment wires (130a) (130b) of the design length (d), and in this state, the elastic blade friction stop point (f) is introduced. The elastic wings (120a) (120b), which are extended inside and out, form a hook-fixed form with respect to the friction stop point (f), and the elastic wing suppression adjustment wire ( The restraining tension (contraction force) (T) caused by 130a) (130b) acts on the wing tip 122. By retracting it, a more sturdy hook-fixed underground head anchor structure (AC) is formed, and this structure (AC) ) resists the vehicle impact load (S), but the expanded elastic wings are not bent back or deformed, and the design expansion angle (θ) is maintained as is, and the motion resistance is supported integrally against the external force (S). Underground anchor system that strengthens the bearing capacity of supports In paragraph 4
The slip straight guide part (E) is formed in the cylindrical body 114 of the anchor head case 110, and the elastic wings (120a) (120b) are concealed in the slip straight guide part (E). At this time, the elastic wings (120a) ( The flat fastening part 126 of 120b) is placed at the lower part of the slip straight guide part (E), and the wing tip part 122 is placed on the upper part of the wing outlet groove (1144a) (1144b) of the anchor head case 110, In this state, when the expansion force (F) is applied to the tension member 300, the elastic wings (120a) (120b) move along the slip straight guide portion (E) and the upper wing tip 122 is formed into the wing outflow groove 1144a. ) The outflow is expanded through (1144b), and along with this, a tight restraining tension (T) is introduced into the elastic blade suppression adjustment wires (130a) (130b) of the design length (d), and at the same time, the elastic blades (120a) (120b) are also designed. While reaching the expansion angle (θ), elastic wing suppression adjustment wires (130a) (130b) to which a tight restraining tension (T) is introduced, and elastic wings (120a) (120b) having a design expansion angle (θ) An underground anchor system that reinforces the bearing capacity of the support, characterized in that resistance to external force (S) is achieved by this operating relationship by forming an organic operating relationship through the anchor head case 110. In paragraph 4
In the expansion movement distance of the elastic wing, the elastic wing passes through the slip straight guide part (E) where the ground friction resistance does not reach, and then gradually expands into the ground from the tip 122 of the elastic wing, so that the ground friction resistance distance is minimized. An underground anchor system that reinforces the bearing capacity of supports, characterized by smooth underground expansion of elastic wings. The ground part of the tension member integrally connected to the head anchor 100 is fixed to the guardrail support, and the guardrail support strengthening method using an underground head anchor structure against the vehicle impact load transmitted through the tension member.
⒜ In terms of the structural shape of the anchor head case 110, the elastic wings 120a and 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 formed as one body, and wing outlet grooves 1144a (1144b) and adjustment wire insertion grooves 1146a (1146b) are formed in the cylindrical body 114, and wing outlet grooves 1144a (1144b) are formed. ) and the conical tip 112, a slip straight guide portion (E) of a certain length is formed inside the cylindrical body 114, and the adjustment wire insertion grooves 1146a and 1146b are longer than the wing outflow grooves 1144a and 1144b. Located above, the structure of the elastic wings (120a) (120b) is formed by integrally forming a plane fastening portion (126) and two symmetrical wings (1224), and the two wings (1224) are connected to the plane fastening portion (126). It is close to vertical and curves outward as it goes toward the wing tip 122, and the structure of the driving support 200 has a connection assembly 216 at the upper part of the hollow shape, and a slide part 212 and a stop support at the lower part ( 214) are formed integrally, while manufacturing them all;
⒝ 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 and 120b, which are integrally fastened and fixed, are connected to the anchor head case 110. Insert across the slip straight guide part (E) in the cylindrical body 114, but make the wing tips 122 of the elastic wings 120a and 120b slightly protrude into the wing outflow grooves 1144a and 1144b, and adjust in this state. Both ends of the design length d of the elastic wing suppression adjustment wires 130a and 130b that pass through the wire insertion grooves 1146a and 1146b are inserted into the insertion holes of the blade tip portions 122 of the elastic wings 120a and 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 onto the connection assembly 216, and is supported on the connection assembly 216 in this state. The washer fixing nut 217 is spirally fixed to the supporting screw portion 314 of the protruding tension member 300, and the driving plate 400 is assembled thereon. At this time, the end of the protruding tension member 300 is connected to the driving plate. Assembling an underground driving penetration structure in which the elastic blades are completely concealed by assembling so as not to deviate from the driving surface 416 of (400);
⒞ A step of striking the driving surface 416 of the underground driving penetration structure in which the elastic blade assembled in step ⒝ above is completely concealed and penetrating it into the ground;
⒟ In the underground driving penetration structure in which the elastic wings for which underground penetration has been completed are completely concealed, the driving plate (400) and the washer fixing nut (217) are disassembled and removed, and an expansion force (F) is applied to the free end of the tension member (300) to form the elastic wings ( By allowing 120a) (120b) to expand into the ground through the wing outflow grooves (1144a) (1144b), and at the same time, tight restraining tension (T) is introduced to the elastic wing suppression adjustment wires (130a) (130b) of the design length (d). The step of forming the “underground head anchor structure (AC) + driving support 200” in which the design widening angle (θ) is formed on the elastic wings (120a) (120b):
⒠ In step ⒟ above, the driving support (200) is pulled out in a sliding manner and removed from the ground so that only the “underground head anchor structure (AC)” remains in the ground. steps;
⒡ Step of fastening and fixing the ground extension line of the tension member (300) to the fastening support iron piece (600) of the support; The step of fastening and fixing the support fixing spiral portion 314 of the ground tension member 300 of the “underground head anchor structure (AC)” of step ⒠ to the fastening support iron piece 600 of the support pole (P). Guardrail support capacity reinforcement method using underground head anchor structure In paragraph 7
In step ⒠, the driving support 200 is removed from the ground, and then a 15 to 35 cm long single pipe is inserted into the hole opened by the driving support 200, and the tension member 300 penetrates the single pipe, and the installation position of the single pipe is A guardrail support bearing capacity reinforcement method using an underground head anchor structure (AC), characterized in that it includes the step of being positioned from the ground surface to the depth of the length. In paragraph 7
When two “underground head anchor structures (AC) + tension members (300)” in step ⒠ are constructed underground, the two tension members (300) extending to the ground are connected to the fastening support steel pieces (600) of the guardrail struts (P). When fixing, the fastening support steel piece 600 has a structure in which a semicircular steel piece 620 and a straight fastening part 622 having a tension member fastening hole 6224 are integrated on both sides, while the guardrail support (P ), half of the support is surrounded by a semicircular steel piece 620 structure, and at this time, two extended tension members 300 are respectively inserted into the tension member fastening holes 6224 of the straight fastening portion 622 and fastened and fixed. Guardrail support bearing capacity reinforcement method using an underground head anchor structure (AC), characterized in that it includes the step of:


delete

Images