KR100951872B1 - The ground reinforcement apparatus and ground reinforcement method - Google Patents

Abstract

The present invention relates to a ground reinforcement device and a ground reinforcement method using the same, the ground reinforcement method of the present invention comprises a drilling step of drilling a buried space in the ground; Inserting the steel bar into the hollow guide tube, and inserting the ground reinforcing device into the buried space; An embedding step of injecting grout into the side of the ground reinforcement device; A compression movement step of moving the steel rod vertically along the guide tube in an upward direction, by moving a moving member in an upward direction to compress a spring; And a pressure plate fixing step of fixing the pressure plate on the protruding outer circumferential surface of the steel bar so that the pressure plate firmly presses the ground by the elastic restoring force of the spring.

By the method of reinforcing the ground, it is possible to prevent the soil from falling down and falling rocks from the rock wall, to reduce the greater natural disaster, to reinforce the ground much more than the conventional technology, and to create many demands.

 Steel bar, protection member, insertion hole, spring, moving member

Description

Ground reinforcement apparatus and ground reinforcement method using the same {The ground reinforcement apparatus and ground reinforcement method}

The present invention relates to a ground reinforcement device and a ground reinforcement method using the same, and in particular, a steel rod and a protection member into which the steel rod is inserted, a spring mounted inside the protection member, and a movement formed at the bottom of the spring. It relates to a ground reinforcement device made of a member, a hollow guide tube, and a ground reinforcement method for reinforcing ground having low stability due to settlement of soil or loss of soil by using the ground reinforcement device.

As the industry develops, it is inevitable to develop slopes such as mountain roads such as foundation roads and complexes. Currently, the sliding phenomenon of slopes is constantly occurring regardless of time and place, and it is a peripheral element that threatens human life and property. Acting as.

For this reason, the soilnailing method is the most widely used as a stabilization method for suppressing the collapse of the slope and the sliding phenomenon. Here, 'soil nailing' refers to the formation of composite reinforcement grounds by installing reinforcement materials (nailing devices) on the original ground to make the best use of the original ground strength, thereby increasing the shear and tensile strength of the ground to suppress displacement and the ground. It is a method to prevent relaxation.

The basic design concept of the 'soil nailing method' is that the reinforcement soil wall is stabilized on any inclined surface by acting as if the land of the area reinforced by the nailing device acts as an integrated retaining wall.

These soil nailing has been used for temporary masonry structures, foundation trenches, etc., but in recent years, the application of the soil nailing, such as slope reinforcement of roads, rock reinforcement such as railroads, dams, tunnel shafts, etc. is being expanded.

The general construction step of the soil nailing method is a step of drilling to a stable height to be able to stand the slope or excavation excavation surface, the step of drilling at a slope of 10 ° ~ 20 ° to the horizontal on the slope or excavation back ground, perforated After nailing and grouting holes and shotcrete for surface protection, excavation, drilling, nail insertion and grouting, and shotcrete until the required height is achieved It is done repeatedly.

Specifically, the small nails used in the construction of excavation support systems, repair of existing retaining walls, and installation of retaining walls, which are necessary for reinforcement of natural and artificial slopes adjacent to trenches, muds, railways and roads, and construction of civil engineering-related facilities such as underground structures and tunnels. Ring-nailing

method) is a series of reinforcement work through the process of excavation or cutting, and excavation is performed at a stable height to support the slope or excavation surface, and at the same time, the surface protection surface is constructed by shotcrete. And drills the back of the excavation to insert a nail and grout it to form reinforcement.

The nailing device according to the prior art is a form in which a steel rod is inserted into a plurality of resin hollow tubes connected by a plurality of resin sockets. The plurality of sockets and the hollow tube are connected in turn.

Before the nailing apparatus is installed on the excavation side, a deep embedding space is drilled in the excavation side in a downwardly inclined direction, and the nailing apparatus is inserted into the excavation side. After the nailing device is inserted, grout such as cement paste and cement mortar is filled between the outer surface of the nailing device and the inner circumferential surface of the buried space. The grout surrounding the outer surface of the nailing device hardens to form a grout pile with the nailing device. After the grout is hardened, the pressure plate is inserted into the bar of the nail nail protruding out of the excavation side, and the construction of the nailing device is completed by fixing with a coupler and a bolt. Therefore, the steel rod in the nailing device is coupled to the socket or the hollow tube so as not to move in the longitudinal direction of the buried space with respect to the socket and the hollow tube.

However, the nailing apparatus according to the prior art has the following problems.

The nailing device imparts a stiffness to drawing by the bearing pressure of the grout, and there are many joints around the embedding space in which the nailing device is inserted according to the ground condition. Therefore, the pressure plate is fixed only by the coupler and the bolt, and since the grout is filled by the injection pressure, it leaks out of the embedment space through cutting when injected into the embedment space, thereby lowering the filling rate inside the embedment space. There is a problem that can not substantially reinforce.

In addition, in order to separate the rod from the nailing device, there is a problem that the rod must be separated after moving the nailing device from the embedding space to the outside.

The present invention has been made in order to solve the above problems, by drilling a buried space in the ground of less stable stability of the sedimentation or sediment of the soil, springs mounted inside the protective member and the protective member and the steel rod is inserted; By inserting the ground reinforcement device coupled to the steel bar and formed in the lower portion of the spring into the buried space to inject grout around the ground reinforcement device, after raising the steel bar upwards, by mounting a pressure plate to press the ground firmly,

Ground reinforcement device and ground reinforcement using the same to reinforce the ground firmly so that the filling rate inside the buried space is not lowered through a number of joints of the buried space, and the steel bar can be directly separated from the ground reinforcement device. To provide a way.

According to the present invention for achieving the object as described above, the ground reinforcement device installed on the perforated ground is a steel rod; A hollow protective member having an insertion hole bored to insert the steel bar on an upper surface thereof; A spring mounted inside the protection member; A moving member through which a center hole is inserted and coupled to the steel bar and formed at a lower portion of the spring and movable along an inner circumferential surface of the protection member; And a guide tube formed on an upper portion of the protective member to guide the steel bar, and as the steel bar moves upward, the moving member also moves upward and compresses the spring.

And, the steel bar is characterized in that coupled to the moving member using a wedge.

And, the movable member is formed with a wedge groove at the bottom, the wedge is characterized in that the movable member and the steel bar is coupled to the wedge groove.

And, the wedge fixing pipe is formed on the inner lower surface of the protective member to fix the wedge.

And, the steel rod is characterized in that the thread is formed at the bottom and the nut is fastened to the thread.

In addition, the ground reinforcement method using the same ground reinforcement method for reinforcing the ground drilling step of drilling a buried space in the ground; Inserting a steel bar into the hollow guide tube, the insertion step of inserting the ground reinforcement device into the embedding space; An embedding step of injecting grout to the side of the guide tube; A compression movement step in which the spring is compressed by moving the steel rod vertically along the guide tube in an upward direction to move the moving member upward; The acupressure plate fixing step of fixing the steel bar to the acupressure plate so that the pressure plate firmly presses the ground by the elastic restoring force of the spring.

And, the compression movement step is characterized in that to raise the steel bar of the ground reinforcement device in the upward direction by using a manpower or a hydraulic device.

In addition, the pressure plate fixing step is characterized in that the coupling between the pressure plate and the steel bar of the ground reinforcement device is a bolt nut coupling, welding coupling or wedge coupling.

As described above, the present invention perforates the buried space in the ground stability is less sedimentation or loss of soil, combined with the steel bar and the spring and the steel rod mounted inside the protective member and the protective member is inserted into the steel bar And inserting the ground reinforcement device formed in the lower part of the spring into the buried space, injecting grout around the ground reinforcement device, raising the steel rod to the upper side, and mounting the pressure plate to press the ground firmly.

First, it is possible to prevent the soil from falling down and falling rocks from the rock wall, thereby reducing further natural disasters.

Second, it is possible to reinforce the ground superior to the conventional technology, it is possible to create a lot of demand.

Hereinafter, with reference to the accompanying drawings will be described in detail ground reinforcement device, and ground reinforcement method using the same.

1 is a cross-sectional view showing a ground reinforcement device according to the present invention, Figure 2 is another cross-sectional view showing a ground reinforcement device according to the present invention.

As shown in Figure 1 and 2, the present invention is a steel bar 10 made of reinforcing bar, the upper surface of the hollow protection member 20 and the insertion hole 22 is inserted so that the steel bar 10 is inserted into the Mounted on the inner upper surface of the protection member 20 and the spring 30 through which the steel bar 10 penetrates inside, and coupled with the steel bar 10 penetrating the spring 30 and the lower portion of the spring 30 Is formed of a movable member 40, which is movable along the inner circumferential surface of the protective member 20, and a hollow guide tube 120 for guiding the steel bar.

Hereinafter, each configuration will be described in detail.

The steel bar 10 is about 7 to 14 m in length of reinforcing bar made of steel, and can be moved up and down by manpower, but it is good to move by using various devices such as a hydraulic device.

Then, a screw groove is formed on the upper side of the steel bar 10 to be firmly coupled to the pressure plate to be described later.

The protection member 20 has a cylindrical shape with a hollow inside, and the insertion hole 22 is perforated to allow the steel bar 10 to be inserted thereon. It is formed deep in the ground for a long time, and it uses a material having good corrosion resistance and abrasion resistance. And, since the spring 30 is mounted to move the steel bar 10 up and down, the inner space should be made to fit the size of the spring (30).

As described above, the spring 30 may move the steel bar 10 of the rebar up and down and have an elastic force to support it. And, the steel rod 10 is mounted on the inner upper surface of the protective member 20, the steel rod 10 inserted into the insertion hole 22 of the protective member 20 is also inserted into the spring 30, the steel rod An end of 10 is formed extending from the lower surface of the spring (30).

Preferably, the spring 30 is compressed and restored while contacting the inner surface of the protective member 20 to prevent deformation.

The moving member 40 is a disk-shaped center hole 45 through the center so that the steel bar 10 is coupled, the protection member 20 is formed on the lower side. In particular, the moving member 40 is coupled to the steel bar 10 and as the steel bar 10 moves in an upward direction, the moving member 40 also moves in an upward direction along an inner circumferential surface of the protective member 20. To compress the spring (30). In addition, since the spring 30 must be supported so as not to be restored, a material having high strength and hardness is used.

On the other hand, the steel bar 10 can be coupled in a variety of ways, such as welding to couple with the movable member (40).

Preferably, the steel bar 10 and the moving member 40 is preferably coupled using the wedge (50). Therefore, the wedge groove 41 is formed at the bottom of the movable member 40 so that the wedge 50 is easily coupled. The wedge groove 41 has a triangular or trapezoidal cross section and the wedge 50 is fitted into the wedge groove 41 so that the steel rod 10 and the movable member 40 are firmly coupled to each other. The wedge 50 is possible in a variety of shapes, in order to easily separate and configure the optimum moment in the shape of the trapezoidal cross-section is preferably mounted on the outer circumferential surface of the steel bar at intervals of 60 ° or 90 ° and 120 °.

In addition, the wedge 50 has a wedge fixing pipe 52 formed on an inner lower surface of the movable member 40 to be easily fixed to the steel bar 10.

In addition, the steel rod 10 has a lower end thread (42) is formed so that the nut 44 is fastened to the thread 42, the upper portion of the nut 44 without engaging the moving member 40 by welding Surface and the lower surface of the movable member 40 is in close contact. Therefore, the moving member 40 is caught by the nut 44 as the steel rod 10 moves upward, so that the moving member 40 can also move upward.

1 (a) is before the steel rod 10 moves in an upward direction, the wedge 50 is coupled to the steel rod 10 and the movable member 40 by the wedge fixing pipe 52. It is fixed as possible. Without the wedge fixing pipe 52, the wedge 50 may be separated before the steel rod 10 and the moving member 40 is coupled.

1 (b) shows that the moving member 40 is coupled to the steel rod 10 with the wedge 50 as the steel rod 10 moves upward, and the moving member 40 also moves upward. Is moved to. Thus, the spring 30 is shown compressed.

1 (c) shows that the wedge 50 is separated as the steel bar 10 moves downward by the elastic restoring force of the spring 30. The wedge 50 may be separated on its own as it moves downward, but may also be separated by the wedge fixing pipe 52.

2 (a) shows that the lower end of the steel bar 10 is formed of a screw thread 42 and the nut 44 moves the steel bar 10 and the moving member before the steel bar 10 moves upward. To combine. This is because the nut 44 fastened to the thread 42 can be used permanently as long as it is not damaged.

2 (b) shows that the moving part 40 is also moved upward in the upward direction as the steel rod 10 moves upward, thereby compressing the spring 30.

Figure 3 is a working view showing the drilling step of the ground reinforcement method according to the invention, Figure 4 is a working view showing the insertion step of the ground reinforcement method according to the invention, Figure 5 is a ground reinforcement method according to the present invention 6 is an operation diagram illustrating a buried step, and FIG. 6 is an operation diagram illustrating a compression movement step among the ground reinforcement methods according to the present invention, and FIG. to be.

As shown in FIGS. 3, 4, 5, 6, and 7, the present invention provides a drilling step of embedding the buried space 112 and inserting the ground reinforcement device 100 into the buried space 112. Insertion step, the embedding step of injecting grout 130 to the side of the ground reinforcement device 100, the compression movement step of moving the ground reinforcement device 100 upwards, and the ground reinforcement device 100 Consists of five steps of the acupressure plate fixing step for mounting the acupressure plate 140, the ground reinforcement device 100 is a steel rod 10, the insertion hole 22 so that the steel rod 10 is inserted into the upper surface as described above The perforated hollow protection member 20, the spring 30 mounted inside the protection member 20, and the steel bar 10 are inserted into and coupled to the center hole 45 so that the spring 30 is inserted therein. Is formed in the lower portion of the movable member 40, which moves along the inner circumferential surface of the protective member 20, the hollow to guide the steel bar It consists deugwan 120.

Hereinafter, each step will be described in detail.

The drilling step forms a buried space 112 by drilling the ground reinforcement device 100 to the ground 110 or the slope of the ground 110 to a predetermined depth. The buried space 112 is formed to be drilled perpendicular to the ground 110 to a depth of approximately 8m ~ 12m.

In the inserting step, the ground reinforcement device 100 is inserted into the buried space 112 by a predetermined depth. At this time, the protection member 20 may be inserted so as not to contact the buried space (112). However, the device for inserting the ground reinforcement device 100 is various, such as a pneumatic device, an excavator.

In addition, a hollow guide tube 120 is formed above the protective member 20 so as to communicate with the protective member 20. The guide pipe 120 uses a PVC pipe, usually formed larger than the diameter of the steel bar (10) serves as a guide to move vertically when the steel bar (10) moves up and down. Therefore, the diameter of the guide tube 120 is preferably manufactured to the extent that the steel bar 10 can move up and down.

In the embedding step, the ground reinforcement device 100 is inserted into the embedment space 112 and the grout 130 is injected into the remaining space. Therefore, the grout 130 is embedded in the ground reinforcement device 100 and the guide pipe 120 side.

Since the drilling step, the insertion step, the embedding step is a general method for reinforcing the ground, detailed description thereof will be omitted.

The compression movement step is to move the steel bar 10 in the upward direction, the method of moving the steel bar 10 in the upward direction may use a manpower or a hydraulic device.

Therefore, as the steel bar 10 moves upward, the moving member 40 coupled to the steel bar 10 also moves upward. The coupling of the steel rod 10 and the moving member 40 can be coupled in a variety of ways, such as welding, wedge coupling, bolt nut coupling, the present embodiment is a thread 42 is formed at the bottom of the steel rod 10 The nut 44 is coupled to the thread 42 to be coupled to the moving member 40.

Similarly, as the movable member 40 moves upward, the spring 30 is also compressed. However, since the spring 30 must support the reinforcing bar of the steel bar 10, it should be equipped with a spring having a large elastic modulus without deformation.

In addition, the upper portion of the protective member 20 is formed in communication with the guide tube 120 so that the steel bar 10 moves perpendicular to the ground.

The acupressure plate fixing step is to couple the acupressure plate 140 to the steel bar 10, a portion of the steel bar 10 protrudes to the ground as the steel bar 10 is moved upward in the compression movement step , The pressure plate 140 is coupled to the protruding portion. That is, the steel bar 10 is moved upward and fixed by a hydraulic apparatus, and then the pressure plate 140 is fastened to the protruding portion of the steel bar 10 by welding, wedge coupling, and bolt nut coupling.

When the acupressure plate 140 is fastened and fixed, the steel bar 10 is restored downward by the elastic force of the spring 30 when the fixing of the hydraulic device is removed. Therefore, the portion in which the shiatsu plate 140 is fastened to the steel bar 10 is fastened to the center of the portion of the steel bar 10 protruding outward from the buried space 112, the steel bar 10 is restored to the lower direction When the pressure plate 140 is strongly pressed against the ground by the elastic force of the spring (30).

As such, in the related art, since the pressure plate is fastened to the steel bar so as to only contact the ground, leakage of grout generated between the pressure plate and the ground is completely blocked.

As described above, the present invention has a basic technical idea that the pressure plate is reinforced by a spring mounted on the ground reinforcement device to reinforce the ground firmly, which is merely an example, and is one of ordinary skill in the art. It will be understood that various modifications and equivalent embodiments are possible from, and the true technical protection scope of the present invention should be defined only in the appended claims.

1 is a cross-sectional view showing a ground reinforcement device according to the present invention.

2 is another cross-sectional view showing a ground reinforcement device according to the present invention.

Figure 3 is a working diagram showing the drilling step of the ground reinforcement method according to the present invention.

Figure 4 is a working view showing the insertion step of the ground reinforcement method according to the invention.

5 is a working view showing a purchase step of the ground reinforcement method according to the present invention.

6 is a working view showing a compression movement step of the ground reinforcement method according to the invention.

Figure 7 is a working diagram showing the pressure plate fixing step of the ground reinforcement method according to the invention.

<Explanation of symbols on main parts of the drawings>

10: steel bar 20: protective member

22: insertion hole 30: spring

40: moving member 41: wedge groove

42: thread 44: nut

45: center hole 50: wedge

52: wedge fixing pipe 100: ground reinforcement device

110: ground 112: buried space

120: guide building 130: grout

Claims (8)

In the ground reinforcement method for reinforcing the ground 110, The ground reinforcement device 100 is a steel rod 10, a hollow protective member 20, the insertion hole 22 is bored so that the steel rod 10 is inserted into the upper surface, a spring mounted inside the protective member 20 ( 30, and a movable member 40 through which a central hole 45 is inserted and formed in the lower portion of the spring 30 so as to be inserted and coupled to the steel bar 10, and movable along an inner circumferential surface of the protective member 20; Is formed on the upper portion of the protective member comprises a hollow guide tube 120 for guiding the steel bar, A drilling step of drilling the buried space 112 in the ground 110; Inserting the steel bar 10 into the hollow guide tube 120, the insertion step of inserting the ground reinforcement device 100 into the embedding space; An embedding step of injecting the grout 130 to the side of the guide tube; As the steel bar 10 is moved vertically along the guide tube 120 in the upward direction, the moving member 40 also moves in an upward direction to compress the spring 30 is compressed; The acupressure plate fixing step of fixing the steel bar 10 to the acupressure plate 140 so that the acupressure plate 140 firmly presses the ground 110 by the elastic restoring force of the spring 30; Reinforcement method. delete The method of claim 1, The acupressure plate fixing step is the ground plate reinforcement method, characterized in that the coupling between the acupressure plate 140 and the steel bar (10) is a bolt nut coupling, welding coupling or wedge coupling. In the ground reinforcement device installed on the perforated ground, Steel rod 10; A hollow protective member 20 in which an insertion hole 22 is drilled to insert the steel rod 10 on an upper surface thereof; A spring 30 mounted inside the protection member 20; A moving member 40 through which a center hole 45 penetrates and is formed at a lower portion of the spring 30 so that the steel rod 10 is inserted and movable along the inner circumferential surface of the protective member 20; And a hollow guide tube (120) formed on an upper portion of the protective member to guide the steel bar. The method of claim 4, wherein Wedge groove 41 is formed in the lower portion of the movable member 40, the wedge 50 is fitted into the wedge groove 41, characterized in that the movable member 40 and the steel bar 10 is coupled. Ground reinforcement device. delete The method of claim 5, Ground reinforcement device, characterized in that the wedge fixing pipe 52 is formed on the inner lower surface of the protective member 20 to fix the wedge (50). The method of claim 4, wherein The steel rod (10) is ground reinforcement device, characterized in that the thread 42 is formed at the bottom and the nut (44) is fastened to the thread (42).

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