KR20100081704A

KR20100081704A - Structure and method for pressure reinforcement of slope site

Info

Publication number: KR20100081704A
Application number: KR1020090001061A
Authority: KR
Inventors: 김용기
Original assignee: (주) 효창이엔지; 김용기
Priority date: 2009-01-07
Filing date: 2009-01-07
Publication date: 2010-07-15

Abstract

The present invention increases the overall shear strength of the ground itself by inserting a reinforcing material in the slope ground, slope surface reinforcement structure to suppress the displacement of the ground expected during or after construction by pressing the surface of the slope ground with the ridge network and strands And the public law.

The present invention is composed of a body portion and the back of the head portion, in the state in which the body portion is inserted into the drilling hole of the inclined ground, a small nail fixed to the inclined ground by the drilling hole grouting; A ridge net installed to cover an inclined ground front surface; A strand that crosses vertically and horizontally at upper, lower, left, and right sides of the perforation hole to form four crossing points, and the stool is continuously arranged on the ridge network; A plate covering a crossing point of the perforated hole and the stranded wire on the ridge network, wherein a center hole is formed, and a pressure plate in which the rear head portion of the small nail protrudes out of the inclined ground through the center hole; A U-shaped bolt that is fastened to support the stranded wire at a lower surface of the pressure plate to indirectly couple the pressure plate and the stranded wire; A turnbuckle coupled to both ends of the strand and applying tensile force; And an external spring that is compressed and fixed in the state of being fitted into the back of the small nail and presses the pressure plate. It provides a slope ground pressure reinforcement structure comprising a.

Description

Structure and Method for pressure reinforcement of slope site

Sloped ground, which is caused by cutting work for the construction of complexes, roads, ports, and railroads, is wide in area and subject to natural disasters. In many cases, the stability of slopes is increasing as a disaster prevention measure against the collapse of slopes. The present invention increases the overall shear strength of the ground itself by inserting a reinforcing material in the slope ground, slope surface reinforcement structure to suppress the displacement of the ground expected during or after construction by pressing the surface of the slope ground with the ridge network and strands And the public law.

In construction that requires ground cutting, it is common to construct the earth block to prevent the collapse of the ground remaining after the earth cutting and to supplement it with earth anchors, struts, etc. to prevent the earth block from falling. However, when the excavation back ground is narrow, earth anchor construction is impossible, and when the excavation surface is wide, strut construction is impossible, so in this case, a small nail is constructed.

Soil nailing method is a reinforcement earth method that drills the ground and inserts reinforcement and grouts the inside of the hole, reinforcing the periphery of the hole and increasing the overall shear strength of the base itself by the tensile stress of the reinforcement. When the small nailing method is applied, the overall stability of the ground is increased, but the countermeasure against rockfall and local collapse of the sloped surface is insufficient. Therefore, conventionally, wire mesh, wire ropes, etc. were installed on the surface of the inclined ground to prevent rockfall and local collapse of the ground surface. However, such a conventional method only prevents the falling of rocks and the like from the inclined ground, and a member such as a wire mesh or a wire rope has not been utilized as a member for enhancing stability against local collapse of the ground surface.

The present invention provides a separate surface protection process by improving the connection between the soil nailing method and the ground surface reinforcement and rockfall prevention means by simultaneously compressing and strengthening the sloped ground itself and the surface of the sloped ground during the soil nailing process. By omitting, the construction process can be simplified, the air shortening and cost reduction in the construction stage, as well as to provide a slope ground reinforcement structure and construction method to enhance the stability of the slope ground.

The problem solving means of the present invention for solving the above problem is as follows.

1. Strengthen the shear strength of the entire ground by constructing soil nailing on the sloped ground.

2. Strengthen the shear strength against surface failure by applying spiral grout reinforcement to the surface of sloped ground in the drilled hole.

3. The pressure plate is connected to the stranded wire primarily tensioned by the turnbuckle, and the pressure plate presses the ridge net to be in close contact with the inclined ground surface, thereby removing the surface from the passive type reinforcement like the existing rockfall prevention net. It enables the surface reinforcement of the active type that actively suppresses the displacement.

4. By compressing the outer spring fitted to the back of the small nail, by pressing the fixing plate by the restoring force of the outer spring, by taking a structure to strongly pull the strand wire to be fastened with the pressing plate to be fixed in the secondary tension state, as a result The strand is to be installed in the form of tying the slope ground to maximize the reinforcement effect of the slope ground.

5. Corrosion-resistant strands should be arranged to form intersections of wells in each drilled hole to reinforce the surface of sloped ground stably, and the press plate and the stranded strands can be easily combined using U-bolts.

According to the present invention has the following effects.

1. A secondary tension force introduced to the strand wire by connecting the pressure plate to the stranded strand primarily by the turnbuckle and then pushing it toward the inlet hole formed in the inclined ground by the restoring force of the compression spring fixed on the press plate. As a result, the strand is strongly tied to the inclined ground, thereby maximizing the reinforcing effect of the inclined ground.

2. Actively curb rockfall occurrences or shallow destruction of surface scour, which account for the majority of slope collapse events, which can reduce social costs by reducing the number of incidents or maintenance.

Ⅰ. Slope ground press reinforcement structure

The present invention is composed of a body portion 110 and the back of the head 120, the body portion 110 is inserted into the drilling hole (2) of the inclined ground (1), in the drilling hole (2) grouting Small nail 100 is fixed to the inclined ground (1) by the; A sloping net (200) installed to cover the entire inclined ground (1); A strand 300 that crosses vertically and horizontally in the top, bottom, left, and right of the periphery of the perforation hole 2, and is arranged such that the square shape is continuous on the ridge network 200; As the plate covering the intersection of the perforation hole 2 and the strand 300 on the ridge network 200, a central hole 410 is formed, the back head 120 of the small nail 100 is the center A pressure plate 400 disposed to protrude out of the inclined ground 1 through the hole 410; A U-shaped bolt 500 that is fastened to support the strand wire 300 on the lower surface of the pressure plate 400 to indirectly couple the pressure plate 400 and the strand wire 300; A turnbuckle 600 coupled to both ends of the strand 300 to exert a tensile force; And an external spring 700 that is compressed and fixed in the state of being fitted to the small nail 100 in the back of the head 120 to press the pressing plate 400. It provides a slope ground pressure reinforcement structure comprising a.

Figure 1a is a perspective view of the inclined ground pressure reinforcement structure according to the present invention, Figure 1b is a cross-sectional view showing the coupling relationship between the ridge network 200, the strand 300, the pressure plate 400 and the U-bolt 500, Figure 2a 2F is a diagram illustrating a small nail 100, a ridge net 200, a strand 300, a pressure plate 400, a U-bolt 500, and a wedge-shaped fixing device 800, respectively, which are applied to the present invention. Hereinafter, a detailed description for each component of the present invention according to the accompanying drawings.

1. Soil Nails

As shown in FIG. 2A, the small nail 100 includes a body part 110 embedded in a perforation hole 2 of the inclined ground 1 and a rear head 120 installed to protrude out of the inclined ground 1. It consists of). The body portion 110 is fixed to the ground by the drilling hole grouting, and reinforces the shear strength of the entire inclined ground by the pull-out stress of the body portion 110 and the friction between the grouting body and the ground. It is preferable to form a screw thread on the outer circumferential surface of the laryngeal part 120 as shown in FIG. 2A for fixing and fixing the outer spring 700 to be described later.

2. Grout Stiffener

The grout reinforcement 900 is a member coupled in a helical enclosing shape on the body portion 110 of the small nail 100. The grout reinforcement 900 is a component for reinforcing the shear strength against the slope of the ground surface by increasing the bonding force between the small nail 100 and the grout material is installed on the inclined ground surface side of the drilling hole (2).

3. ridge

The ridge network 200 is a general member that is used in various ways, such as fences, rockfall prevention nets, is installed to cover the entire slope (slope ground). This can be made of a general PVC material, simply install the ridge net on the inclined ground can be expected only the effect of falling rock, etc. In the present invention organic of the strand 300, the pressure plate 400 and the external spring 700 will be described later By the coupling structure, the ridge network 200 can serve as a reinforcing material to press the entire slope ground (1).

3. strand

The strand 300 is disposed on the ridge network 200 such that four intersections are formed vertically and horizontally in the top, bottom, left, and right of the perforation hole 2. In other words, the intersection of the wells is formed around the perforation hole 2. By arranging the strand 300, the inclined ground 1 can be woven in duplicate. The strand 300 is preferably zinc molten plating, in the case of zinc molten plating is because the zinc is melted and coated at a high temperature as it is coated with a thick thickness, but the appearance may be rough, but excellent durability and good corrosion As it is not supported, it is suitable for structures.

4. Pressure plate

The pressure plate 400 is a plate covering the intersection of the drilling hole 2 and the strand 300 on the ridge network 200, the central hole 410 is formed. The back head 120 of the small nail 100 is arranged to protrude out of the inclined ground 1 through the central hole 410, the pressing plate 400 is the mediated through the U-shaped bolt 500 to be described later Indirectly coupled to the strand 300. The pressure plate 400 is pressed toward the inlet hole 2 under the compressive force, and thus the strand 300 is pulled tightly to strongly bind the surface of the inclined ground 1. The pressing plate 400 is composed of a square plate as shown in Fig. 2d, and can be configured to fasten four U-shaped bolts 500 to be described later by forming two bolt holes for each side center. have.

5. U bolt

The U-bolt 500 is a member having a male thread formed at the end bent in a U shape as shown in [FIG. 2E], and an end of the male thread formed with the nut 520 as shown in [FIG. 1B]. Can be screwed in. Holding the strand 300 to the bent portion of the connecting bolt 500, the end of the male thread is formed to be fastened through the bolt hole of the pressure plate 400, thereby indirectly indirectly connecting the strand 300 and the pressure plate 400 Will be tightened.

6. Turnbuckle

The turnbuckle 600 is a general coupler utilized for connecting and tensioning a linear member. In the present invention, the turnbuckle 600 is coupled to both ends of the strand 300 to exert a tensile force on the strand 300. The strand 300 is primarily tensioned by the turnbuckle 600.

7. External Spring

The outer spring 700 is a member that is fitted to the small nail 100, the back of the head portion 120 is compressed and fixed to the pressing plate 400, the restoring force acts as an external pressure to press the pressing plate 400. The restoring force eventually acts as a force for secondary tension of the strand 300.

8. Wedge Fixture

The exterior spring 700 may be compressed and fixed with a fixing nut 130 that is screwed to the rear head 120 of the small nail 100, but as a wedge fixing device 800 as shown in FIG. 2F. Compression fixation is easier. The wedge-shaped anchoring member 800 has a lower member 810 having an inclined curved surface formed on an inner circumferential surface thereof; A wedge member 820 fitted to an inner circumferential surface of the lower member 810 to engage the small nail 100 with the back head 120; And an upper member 830 coupled to cover an upper portion of the lower member 810. The wedge-shaped anchorage 800 is pushed down as it is inserted into the rear head 120 of the small nail 100 to compress the exterior spring 700, and the rear head 120 and the wedge member 820 of the small nail 100 are 820. The outer spring 700 is fixed in a compressed state by the wedge coupling with).

II. Slope ground press reinforcement method

The present invention comprises the steps of: (a) forming a plurality of boring holes (2) opening the longitudinally and horizontally by drilling the inclined ground (1); (b) Inserting the small nail 100 consisting of the body 110 and the back of the head 120 in each of the drilling holes (2), in the state in which the back of the head 120 protrudes out of the inclined ground (1), Grouting the inside of the drilling hole (2); (c) laying and fixing the ridge net 200 on the front of the inclined ground (1); (d) arranging the strand 300 in the vertical and horizontal directions on the ridge network 200 so as to form four crossing points at upper, lower, left, and right sides of the perforation hole 2; (e) the pressing plate 400 having the central hole 410 formed therein is inserted into the rear head 120 of the small nail 100, and the strand wire 300 and the pressing plate 400 are fastened with a U-shaped bolt 500. Making; (f) tensioning the strand 300 by tightening and tightening a turnbuckle 600 at both ends of the strand 300; (g) by inserting the outer spring 700 in the small nail 100, the back of the head (120) by compressing and fixing with a wedge-shaped fixing member 800, the pressing plate 400 by the restoring force of the outer spring 700 Installing to be pushed toward the entrance of the drilling hole (2); Provides a slope ground pressure reinforcement method consisting of.

Figures 3a to 3g are shown for each step of the slope ground pressure reinforcement method according to the present invention, Figure 4 shows a state of reinforcing the slope ground according to the present invention. Hereinafter, the present invention according to the accompanying drawings Detailed description will be made for each implementation step.

1.step (a)

This step is a step of forming a plurality of vertically and horizontally formed in the perforated hole (2) in which the entrance is opened by drilling the inclined ground (1) as shown in FIG.

Drilling work shall be carried out after completion of preliminary structural calculation, taking into account the spacing, diameter, position, direction, and depth of the drilling holes (2). In addition, after the drilling operation is made should clean the inside of the drilling hole (2). The reason why the inlet of the punching hole 2 is formed to be wide is that the pressing plate 400 is recessed toward the inlet of the punching hole 2 together with the strand 300 by receiving the restoring force of the outer spring 700. This is to enhance the slope ground reinforcement effect due to the effect of pulling the strand 300 from both sides.

2. Step (b)

In this step, as shown in [Fig. 3b] by inserting a small nail 100 consisting of a body portion 110 and a laryngeal part 120 in each of the perforation holes (2), the laryngeal part 120 is inclined ground ( 1) grouting the inside of the drilling hole (2) in the state protruding to the outside.

The grout material used in this step is a cement mortar-type grout material or cement paste-type grout material that is injected into the drilled hole 2 formed in the inclined ground 1 to fix the small nail 100. Cement cartridge type grout material, etc. can be applied alternatively. The body portion 110 of the small nail 100 has to be removed in advance of rust or foreign matter on the contact surface for attachment to the grout material. In addition, the body portion 110 may be rust-prevented with an epoxy coating or the like in preparation for corrosion. The grout material should be filled to be completely filled below the inlet of the drilling hole (2).

On the other hand, this step can be carried out after coupling the grout reinforcement 900 in the form of a spiral enclosed on the upper portion of the body portion 110 of the small nail 100, as shown in [3b], thereby It can strengthen the shear strength against surface failure of sloped ground.

3. Step (c)

This step is a step of fixing the ridge net 200 in front of the inclined ground (1) as shown in FIG. The ridge network 200 is in close contact with the inclined ground 1 by the external spring 700, the pressure plate 400 and the strand 300 according to the implementation of the following steps.

4. Step (d)

In this step, as shown in FIG. 3D, the strand 300 is vertically and horizontally disposed on the ridge network 200 so as to form four intersections at the top, bottom, left, and right sides of the perforation hole 2. .

5. Step (e)

In this step, as shown in FIG. 3e, the pressure plate 400 having the central hole 410 is inserted into the small nail 100, the back head 120, and the strand 300 and the pressure plate 400. The step of fastening the U-shaped bolt (500).

6. (f) step

This step is to tighten the turn line 300 by tightening and tightening the turnbuckle 600 at both ends of the strand 300, as shown in Figure 3f. By the implementation of this step, the primary tension force is introduced into the strand 300.

7. (g) step

In this step, by inserting the outer spring 700 in the back of the small nail 100, the wedge-shaped fixing member 800, the pressing plate 400 by the restoring force of the outer spring 700 The installation step is to be pushed toward the entrance of the drilling hole (2). In this step, the restoring force of the exterior spring 700 acts as a force that continuously presses the pressure plate 400, which is the effect of pulling the strand 300 from both sides to introduce a secondary tension force. .

Figure 4 shows a state in which the inclined ground in accordance with the present invention described above. As shown in the drawing, the strand 300 is strongly woven vertically and horizontally along the entire inclined ground.

Figure 1a is a perspective view of the slope ground pressure reinforcement structure according to the present invention.

1B is a cross-sectional view showing a coupling relationship between a ridge net, a pressure plate, a stranded wire, and a U-bolt.

Figures 2a to 2f respectively show a nail, ridged net, stranded wire, pressure plate, U-bolt and wedge anchorage applied to the present invention.

Figure 3a to 3g shows the step of the slope ground reinforcement method according to the present invention for each step.

Figure 4 illustrates a state in which the slope ground is reinforced according to the present invention.

1: inclined ground 2: drilling hole

100: small nail 110: body (small nail)

120: larynx tofu (nail nail)

200: ridge network 300: stranded wire

400: Pressure plate 500: U bolt

600: Turnbuckle 700: External Spring

800: wedge anchorage 900: grout reinforcement

Claims

It is composed of a body portion 110 and the back of the head portion 120, the body portion 110 is inserted into the drilling hole 2 of the inclined ground (1), the inclined ground by the drilling hole (2) grouting A small nail 100 settled in (1);

A sloping net (200) installed to cover the entire inclined ground (1);

A strand 300 that crosses vertically and horizontally in the top, bottom, left, and right of the periphery of the perforation hole 2, and is arranged such that the square shape is continuous on the ridge network 200;

As the plate covering the intersection of the perforation hole 2 and the strand 300 on the ridge network 200, a central hole 410 is formed, the back head 120 of the small nail 100 is the center A pressure plate 400 disposed to protrude out of the inclined ground 1 through the hole 410;

A U-shaped bolt 500 that is fastened to support the strand wire 300 on the lower surface of the pressure plate 400 to indirectly couple the pressure plate 400 and the strand wire 300;

A turnbuckle 600 coupled to both ends of the strand 300 to exert a tensile force; And

An external spring 700 that is compressed and fixed in the state in which the small nail 100 is inserted into the rear head 120 to press the pressing plate 400; Slope ground pressing reinforcement structure, characterized in that configured to include.

The method of claim 1, wherein the outer spring 700,

A lower member 810 having an inclined curved surface formed on an inner circumferential surface thereof;

A wedge member 820 fitted to an inner circumferential surface of the lower member 810 to engage the small nail 100 with the back head 120; And

An upper member 830 coupled to cover an upper portion of the lower member 810; Wedge-shaped anchorage 800 configured to include; Slope ground pressing reinforcement structure, characterized in that the compression fixed by.

In claim 1,

The pressure plate 400 is a square plate,

The U-bolt 500 is fastened to the center of the four sides of the pressing plate 400, respectively,

The inclined ground, characterized in that each strand of the strand 300 is arranged to cross each other in the lower portion of the pressure plate 400 is arranged to be mounted by the U-shaped bolt 500 fastened to one side of the pressure plate 400, respectively. Press reinforcement structure.

The method according to any one of claims 1 to 3,

Grout reinforcement (900) coupled in the form of spirally surrounding the top of the nail nail body portion (110); Slope ground pressing reinforcement structure characterized in that it further comprises.

(A) forming a plurality of perforated holes (2) to form a row vertically and horizontally by drilling the inclined ground (1);

(b) Inserting the small nail 100 consisting of the body 110 and the back of the head 120 in each of the drilling holes (2), in the state in which the back of the head 120 protrudes out of the inclined ground (1), Grouting the inside of the drilling hole (2);

(c) laying and fixing the ridge net 200 on the front of the inclined ground (1);

(d) arranging the strand 300 in the vertical and horizontal directions on the ridge network 200 so as to form four crossing points at upper, lower, left, and right sides of the perforation hole 2;

(e) the pressing plate 400 having the central hole 410 formed therein is inserted into the rear head 120 of the small nail 100, and the strand wire 300 and the pressing plate 400 are fastened with a U-shaped bolt 500. Making;

(f) tensioning the strand 300 by tightening and tightening a turnbuckle 600 at both ends of the strand 300;

(g) by inserting the outer spring 700 in the small nail 100, the back of the head (120) by compressing and fixing with a wedge-shaped fixing member 800, the pressing plate 400 by the restoring force of the outer spring 700 Installing to be pushed toward the entrance of the drilling hole (2); Slope ground press reinforcement method consisting of.

In claim 5,

The step (b) is the slope ground pressure reinforcement method characterized in that the coupling after the grout reinforcement (900) in the form of a spiral enclosing the upper portion of the body portion 110 of the small nail (100).