KR20040090382A - underground excavation method of which use recycling plastic pre-fabrication panel and lasting wall type reinforced panel - Google Patents

Abstract

PURPOSE: An underground excavation method using a pretension soil nail and a prefabricated recycling plastic panel is provided to minimize the influence on an adjacent structure by fixing a prefabricated recycling plastic panel and applying pretension, to cut down the cost required for perforation, installation and grouting by decreasing the reinforcement length of a nail, and to secure the stability by reducing the installation length of a nail. CONSTITUTION: The underground excavation method using a pretension soil nail and a prefabricated recycling plastic panel comprises the steps of: anchoring a prefabricated recycling plastic panel(20), as a separable pressure plate, on a front wall(11) of a soil nail(10) to prevent the buckling of soils after excavation; setting a soil nail head(12) to a groove formed on connecting reinforcements to unify a soil nail(10) and the movement of a soil nail(10); after installing a prefabricated recycling plastic panel(20) to the upper end of the connecting reinforcements, applying tensile force and fastening a fixing nut to make a soil nail(10), a base plate(25) and a prefabricated recycling plastic panel(20) move together.

Description

Underground excavation method of which use recycling plastic pre-fabrication panel and lasting wall type reinforced panel}

According to the present invention, in the soil nailing method applied to the construction of the earth reinforcement wall at the time of underground excavation, the prefabricated recycled plastic panel and the base plate are mounted on the front wall which is the end of the soil nail, and the base plate and the prefabricated recycled plastic panel It is equipped with a connecting reinforcing body that connects the soil nail and the soil nail between them, so that when the nail nail flows, it is able to behave in one piece.In particular, it is free to settle by applying the tensile force calculated after the required curing period after grouting construction. The present invention relates to a method using a prefabricated base plate, which is a recyclable facility instead of wire mesh and shotcrete, which is used for excavation by a tension soil nailing method, and a front reinforcement panel for permanent walls.

In general, there are cut and trench slopes in various roads or railways, tunnel entrances and exits, and other underground excavations near the city, and it is a reality that environmentally friendly reinforcement methods are required while securing cut stability in these areas. .

The soil nailing method, which has been used for a long time, is a shotcrete method on the front of the slope, and the aesthetics are very poor, the construction is difficult, and the back surface water treatment is difficult. In addition, there was a risk of safety accidents due to corrosion of wire mesh and formation of very poor construction surface due to cracking of shotcrete surface.

Soil nailing method is a method that is widely used in underground excavation field since it is applied to temporary wall for the first time in Korea. Recently, it has been applied to permanent slope reinforcement. In order to minimize the impact on the structure, it is required to minimize the deformation of the ground caused by excavation, to reduce the environmental pollution by shotcrete construction, and to be environmentally friendly by recycling resources.

The present invention is to solve the above problems, in order to minimize the deformation of the ground due to the excavation and to apply a tensile force to minimize the impact on the adjacent structures in urban ground excavation work by reducing the reinforcement length of the nail perforation, installation To reduce the cost of construction, grouting, etc., and to prevent the formation of shotcrete walls, which can be a source of contamination in groundwater environments, the aim is to provide a soil nailing method using prefabricated recycled plastic panels and temporary reinforcement panels for permanent walls. .

In order to achieve the above-described purpose, after preliminary excavation, the first shotcrete is drilled, the nails are inserted, the grouting is carried out, the wire mesh is installed, and the second shotcrete is casted. In the Soil Nailing method, in order to prevent the crushing of the excavated soil surface after excavation, a prefabricated recycled plastic panel, which is a pressure plate that is detachable to the front wall, which is the end of the soil nail, is used without using cement-based shotcrete or rust soil which may cause environmental pollution. Process of binding to the grooves formed in the connecting reinforcement to the adjacent reinforcement body in order to integrate the behavior of the soil nail and the soil nail, and installing a prefabricated recycled plastic panel on the top of the connecting reinforcement Tighten the fixing nut so that the tension is not released. It is made by the process is characterized in that the construction of the soil nail, acupressure plate base plate and prefabricated recycled plastic panel integrally behaves during the behavior of the excavation surface, the base plate is made of synthetic resin (Fiberglass Reinforced Plastics), polyethylene (Polyethylene), Polypropylene, Polyamide, Polyacetal, Polycarbonate, Modified Polyphemylene Oxide (PPO), Polybutylene Terephthalate, Polyethylene Terephthalate ( Polyethylene Terephthalate, Ekonol, Polyarylate, Polyamideimide, Polyetherimide are used as materials, and the connecting reinforcement has grooves at both ends. Pre-tensioned nail and prefabricated recycling plastics, characterized in that the formed spanner shape The underground excavation method using the tick panel, the front reinforcement panel for the upper permanent wall with the upper and lower surfaces opened and the mortar casting part formed with the recycled plastic formwork, and the front reinforcement panel for the lower permanent wall with the upper surface opened and the bottom closed An object of the present invention is to provide a front reinforcing panel for a permanent wall, characterized by a structure capable of pouring mortar into the mortar casting part.

1 is a cross-sectional view schematically showing the reinforcement structure of the underground excavation construction using the present invention.

Figure 2 is a perspective view schematically showing the reinforcement structure of the underground excavation is equipped with a base plate and prefabricated recycled plastic panel of the present invention.

3A is a schematic representation of a prefabricated recycled plastic panel of the present invention.

Figure 3b schematically illustrates a front reinforcement panel for a permanent wall of the present invention.

Figure 4 is a cross-sectional view showing a structure equipped with a connecting reinforcing body connecting the nail and the nail of the present invention.

5a and 5b show the structure of the connecting reinforcement of the present invention;

<Brief description of symbols for the main parts of the drawings>

10: Soil nail 11: Front wall

12: snail nail tofu 13: grouting

15: Fixture 20: Prefabricated Recycled Plastic Panel

21: top prefabricated recycled plastic panel 22: bottom top prefabricated recycled plastic panel

23: panel hole 25: base plate

26: plate hole 28: fixing bolt

35: mortar pouring part 40: front reinforcement panel for permanent wall

41: front reinforced panel for upper permanent wall 42: front reinforced panel for lower permanent wall

43: permanent panel hole 45, 50: connection reinforcement

46: groove

According to the present invention, in the soil nailing method applied to the construction of the earth reinforcement wall at the time of underground excavation, the prefabricated recycled plastic panel and the base plate are mounted on the front wall which is the end of the soil nail, and the base plate and the prefabricated recycled plastic panel It is equipped with a connecting reinforcing body that connects the soil nail and the soil nail between them, so that when the nail nail flows, it is able to behave in one piece.In particular, it is free to settle by applying the tensile force calculated after the required curing period after grouting construction. The present invention relates to a method using a prefabricated base plate, which is a recyclable facility instead of wire mesh and shotcrete, which is used for excavation by a tension soil nailing method, and a front reinforcement panel for permanent walls.

Hereinafter, the configuration of the present invention with reference to the accompanying drawings in detail

same.

First, referring to the accompanying drawings, Figure 1 is a cross-sectional view schematically showing the reinforcing structure of the underground excavation construction using the present invention, Figure 2 is a reinforcing structure of the underground excavation is equipped with a base plate and prefabricated recycled plastic panel of the present invention Figure 3a is a schematic perspective view, Figure 3a is a view schematically showing a prefabricated recycled plastic panel of the present invention, Figure 3b is a view schematically showing a front reinforcement panel for a permanent wall of the present invention, Figure 4 is a view of the present invention Figure 5 is a cross-sectional view showing a structure equipped with a connecting reinforcement for connecting the nail and the soil nail, Figure 5a and 5b is a view showing the structure of the connection reinforcement of the present invention.

In general, the construction of the soil nailing is composed of a process of laying the first shotcrete after excavation, then drilling, inserting the nail and grouting, installing a wire mesh and placing the second shotcrete, and using the present invention underground As shown in FIG. 1 schematically showing the reinforcing structure of the excavation construction and FIG. 2, which is a perspective view schematically showing the reinforcing structure of the underground excavation, in which the base plate and the prefabricated plastic panel are mounted, a method of eliminating the shotcrete placing process in the above process After grouting, a base plate 25, which is a pressure plate, and a prefabricated recyclable plastic panel 20, which are removable, are mounted on the front wall 10, which is the distal end of the nail, and the fixture 15 is attached to the front end of the nail using a coupler. 10) After grouting, grouting is performed, and tensile strength is applied after curing. Lee tightens the fixing bolt 28 so that the tension is not released after applying the tensile force.

In addition, the base plate 25 is mounted by applying a compressive force to the two prefabricated panels 20 so that the nail nail 10 and the front wall 11 can be integrally behaved when the excavation excavation surface is actuated. Stability leads to additional stabilization of the excavation surface.

That is, the prefabricated recycled plastic panel, which is a pressure plate that is detachable to the front wall 11, which is an end of the soil nail 10, does not use cement-based shotcrete or rust soil which may cause environmental pollution in order to prevent rubbing of the excavated soil surface after excavation ( 20, the reinforcing body 45 is connected to the head (12) of the tip of the neighboring soil nail (10) in order to integrate the process (S10), and the behavior of the soil nail (10) and the soil nail (10) The process of binding to the groove portion 46 formed in the (50) (S20), and the prefabricated recycled plastic panel 20 is installed on the upper end of the connecting reinforcement (45, 50) and then applied a tensile force, the tensile force is not released It is made of a step (S30) to tighten the fixing nut 27 so that the saw nail 10, the pressure plate base plate 25 and the prefabricated recycled plastic panel 20 integrally behave during the behavior of the excavation surface. It will be constructed so that.

And as shown in Figure 3a schematically showing the prefabricated recycled plastic panel of the present invention, and Figure 3b schematically showing the front reinforcement panel for the permanent wall of the present invention, the prefabricated recycled plastic panel 20 can be recycled. Collect plastic or PET bottles and reprocess them, or use fiberglass reinforced plastics, polyethylene, polypropylene, polyamide, polyacetal, polycarbonate, modified PPO Modified Polyphemylene Oxide, Polybutylene Terephthalate, Polyethylene Terephthalate, Econol, Polyarylate, Polyamideimide, Polyetherimide It is made of steel or galvanized steel plate, and the wall is formed during the backfill of the trench after the wall is constructed. And that the prefabricated recycling after separating the plastic panel 20 and the base plate 25 can be recycled to the other site. In addition, as can be seen in Figure 3b schematically showing the front reinforcement panel for the permanent wall of the present invention, after mounting the nail nail, the upper and lower surfaces are opened and the mortar pour part 35 is formed with the recycled plastic formwork The front reinforcement panel 41 for walls and the front reinforcement panel 42 for the lower permanent wall in which the upper surface is opened and the lower surface is sealed are combined, and the front reinforcement panel 40 for the permanent wall in which mortar is poured into the mortar casting part 35. ) Can be combined with the nail nail 10 to be constructed as a permanent wall.

And as shown in Figure 4 and Figure 5a and 5b showing the structure of the connection reinforcement of the present invention and the structure of the connection reinforcement connecting the soil nail and the soil nail of the present invention, the connection reinforcement ( 45 and 50 have a spanner shape in which grooves 46 are formed at both ends, and the neighboring soy nails 10 are connected to the base plate 25 and the soy nail 10 and the soy nail 10. It can be seen that the binding to the groove 46 formed in the reinforcement (45, 50) and the connecting reinforcement (45, 50) is mounted between the base plate 25 and the prefabricated recycled plastic panel 20. .

3A, 3B, and 5, a panel hole 23 through which the nail nail 10 penetrates is formed at the center of the prefabricated recycled plastic panel 20, and the front reinforcement panel 42 for permanent walls. It can be seen that the permanent panel hole 43 is formed in the base plate 25, the plate hole 26 is formed in the base plate 25.

As described above, the present invention by installing a base plate and a prefabricated recycled plastic panel for temporary construction on the front wall of the end of the existing nail nailing and applying pre-tension (pre-tension tension), urban ground excavation work In order to minimize the impact on neighboring structures, minimize the deformation of the ground due to excavation, and also apply tensile force to reduce the length of nail reinforcement and reduce the cost of construction such as drilling, installation, grouting, etc. Even if the installation length is reduced and adjusted, the required stability can be obtained.

Particularly, the construction of existing nail nailing consists of the process of pouring the first shotcrete after excavation, drilling, inserting the nail, grouting, installing wire mesh, and connecting the second shotcrete with nails and nails with reinforcing bars. The construction process can be simplified by using recycled plastic panels instead of placing shotcrete for reinforcing the front part of the excavation part, and simplifying the construction process and preventing groundwater and environmental pollution by not using cement materials. As a result, the prefabricated recycled plastic panels can be applied or the front reinforcement panels for permanent walls can be applied.

Claims (4)

In the pretension soil nailing method and general soil nailing method which consists of the process of pouring the first shotcrete after drilling, drilling, inserting the nail, grouting, installing wire mesh, and placing the second shotcrete, Prefabricated recycled plastic panel 20, which is a pressure plate that is separable to the front wall 11, which is the distal end of the soil nail 10, without using cement-based shotcrete or rust soil which may cause environmental pollution to prevent rubbing of the excavated soil surface after excavation. Reinforcing body (45, 50) to connect the head (12) and the nail head (12), which is the distal end of the neighboring nail nails (10) in order to integrate the behavior of the nail (10) and the nail (10) The step (S20) for binding to the groove portion 46 formed in the) and the prefabricated recycled plastic panel 20 is installed on the upper end of the connecting reinforcement (45, 50), applying a tensile force, fixed so that the tensile force is not released The process of tightening the dragon nut 27 is made so that the saw nail 10, the pressure plate base plate 25, and the prefabricated recycled plastic panel 20 can be integrated in the behavior of the excavation surface. Characteristic of construction Underground excavation method using pretension soil nail and prefabricated recycled plastic panel. The method of claim 1, wherein the base plate is a synthetic resin (Fiberglass Reinforced Plastics), polyethylene (Polyethylene), polypropylene (Polypropylene), polyamide (Polyamide), Polyacetal (Polyacetal), Polycarbonate, Modified PPO (Modified) Polyphemylene Oxide, Polybutylene Terephthalate, Polyethylene Terephthalate, Econol, Polyarylate, Polyamideimide, Polyetherimide An underground excavation method using pretensioned soil nails and prefabricated recycled plastic panels, which are used as materials. The method of claim 1, wherein the connecting reinforcement (45, 50) is an underground excavation method using a pretensioned soil nail and prefabricated recycled plastic panel, characterized in that the spanner shape formed with grooves 46 at both ends. As a formwork made of recycled plastic, the upper and lower surfaces of the upper reinforcement panel 41 having the upper and lower surfaces open and the mortar casting portion 35 are formed, and the front and rear reinforcement panels of the lower permanent wall having the upper surface opened and the lower surface closed. 42) is coupled to the permanent panel hole 43 is formed in the middle, the front reinforcement panel for a permanent wall, characterized in that the structure to cast mortar to the mortar casting portion (35).