KR100446586B1 - Soil-Nail able to Withdraw Itself by Blasting - Google Patents

Abstract

The present invention relates to a soil nailing method used in the soil nailing method or the rock bolt method, which is a kind of earthquake method for stabilizing the excavation wall surface of the ground in various excavation works of civil engineering and construction, in particular, the soil for stabilizing the ground And by combining the blasting technology with the technology of the basic field, it is possible to easily and quickly remove the reinforcing anchor bars or rock bolts embedded in the ground surrounded by grout solidification at the time when the role of the soil block ends and fills the periphery of the excavation wall. The disassembly removal type small nail device which is easy to collect

The present invention provides a dismantlement-type soil nail device having a structure in which a synthetic resin pipe for introducing a dopant wire is attached to a body of an anchor iron rod used to construct an earth anchor by a soil nailing method or a rock bolt method in advance. At the end, the grout solidified body integrated with the reinforced steel bar rod is crushed by inserting the chemically-expanded polytherapeutic vessel into the inside of the synthetic resin pipe for inleting the widening vessel. After peeling the bar, the anchor bar can be easily pulled out to the ground for removal and recovery.

Description

Soil-Nail able to Withdraw Itself by Blasting}

The present invention relates to a soil nailing method used in the soil nailing method or the rock bolt method, which is a kind of earthquake method for stabilizing the excavation wall surface of the ground in various excavation works of civil engineering and construction, in particular, the soil for stabilizing the ground And by combining the blasting technology with the technology of the basic field, it is possible to easily and quickly remove the reinforcing anchor bars or rock bolts embedded in the ground surrounded by grout solidification at the time when the role of the soil block ends and fills the periphery of the excavation wall. The present invention relates to a dismantlement-type small nail device which can be easily recovered.

In order to protect and maintain the excavation wall that is expected to collapse due to earth pressure in various excavation work, the earth wall is installed.

There is a Soil Nailing method as one of the methods for preventing the deformation of the earth wall and stabilize the back ground.

As shown in Fig. 1A, the soil nailing method drills downwardly in the ground of the retaining wall 1, inserts reinforcing steel bars 2 into the boring, and injects and hardens grout material such as mortar to grout high. After forming the conduit (3), the end of the reinforcing bar (2) exposed to the ground to secure the earth wall (1) with a pressure plate (4) and fixing nuts (5), etc. Will form a sieve.

Soil nail anchor body is installed as shown in Figure 1b, as a length of 3 ~ 20m in the ground according to the soil and rock quality of the site, as the process proceeds through the excavation of a number of construction at intervals of 1 to 3m between each other Done.

The small nail anchor body installed by the soil nailing method as described above increases the stiffness of the ground plate against the earth pressure acting toward the excavating wall surface, that is, the earth wall through the friction resistance of the main surface of the grout and the pullout resistance of the anchor reinforcing bar. It is a self-supporting soil membrane construction method to be able to support independence, and has the advantage of good workability as a universal construction method that is used most recently in order to stabilize the excavation wall.

However, the small nail anchor body by the Soil Nailing method is usually constructed by reinforcing bars embedded in the ground invading adjacent land boundary lines. There are problems such as delayed air due to consultations, payment of land use fees, obstacles to underground obstacles in the construction of neighboring areas, as well as environmental pollution due to corrosion.

Therefore, it is desirable to remove the reinforcement embedded in the ground at the time when the meaning of the earth block is completed and backfills the periphery of the excavation wall. Between the excavated wall surface and the structure of the excavated structure, the reinforcing bar is surrounded by the grout consolidation. It is not so easy to draw and remove in narrow places.

Accordingly, the technical development of this part is actively underway. As a related art, as shown in Fig. 2, the stator socket 7 is formed on the outer circumference of several (3-7) spiral connection reinforcing bars 6. ), The reinforcing bar 6 is inserted into the sheath tube 8 made of one synthetic resin tube, and then inserted into the perforation of the ground, and grout material such as mortar is injected into the sheath tube 8. There is a screw removal method of nailing to form a small nail anchor body through the method of forming the grout solidified body (9).

The small nail anchor body by the screw-removing small nailing method is pulled out to the ground by rotating the reinforcing bar 6 to remove at the time when the earthen role ends, the reinforcing bar 6 is a thread of the stator socket (7) It can be recovered by being pulled out of the sheath tube 8 surrounded by the grout solidified body 9 while rotating along.

The above screw-removable soil nailing method has the advantage that the reinforcing bar can be recovered and the anchor bar can be used again.

However, in order to remove and recover the reinforcing bars inserted into the ground, the reinforcing bars must be rotated with a great force until the final exit to the outside of the retaining wall, and the drawing work is very difficult, and the recovery time is delayed. there was.

In particular, since the structure of spiral reinforcing bars, stator sockets, and synthetic sheath pipes is a complex spiral device that must be specially manufactured, the material purchase cost is very expensive, and as a result, the construction cost is large, resulting in an uneconomic problem that is constrained in practical adoption. have.

In addition, there is a fear of gradual breakdown due to stress concentration in the stator socket portion, and a problem of inferior safety has been pointed out.

In addition, there is a problem that the sheath pipe and the stator socket remain in the ground after the removal of the reinforcing bar, and means for refilling the cavity created by the removal of the reinforcing bar are not taken, resulting in the weakening of the adjacent ground. Not only that, but also the problem of polluting the underground environment is not completely solved.

On the other hand, one of the methods for stabilizing the excavation wall surface of the trench is a rock bolt method, which inserts the rock bolt into the perforation of the ground and forms a grout solidified body on the outer circumference of the rock bolt. It is very similar to the Soil Nailing method described above.

Therefore, this rock bolt method also has the problems shown in the above-described Soil Nailing method due to the rock bolt installed for reinforcement of the underground anchor body. Follow.

Accordingly, the present invention in order to solve the disadvantages of the small nailing method and rock bolt method for stabilizing the excavation wall surface of the excavation portion and take advantage of the advantages, the reinforcing reinforcement or rock bolt embedded in the ground while invading the adjacent ground boundary line ( Hereinafter, as a meaning encompassing the aforementioned reinforcing bars and rock bolts, they are referred to collectively as "anchor bar".), Etc. have been researched and developed to solve various problems occurring in the prior art.

Accordingly, an object of the present invention is to easily and completely remove the anchor iron bar used as a reinforcing material of the underground anchor body at the time when the role of the earth block is complete, without residue, the first civil construction consultation smoothly during the construction Prevents air delays due to delays, prevents civil complaints about the occupancy of land by others due to underground residues after the completion of the earthen barrier, and avoids the burden of land occupancy charges. It eliminates obstacles when constructing adjacent areas in the future, and fourth, it prevents environmental pollution due to corrosion and residual residues of reinforcing anchor bars inserted and existing in the ground. Enhancing the economics by allowing anchor rods to be recycled while allowing relatively simple and quick construction The present invention is to provide a dismantlement-removable small nail device that can be easily recovered.

Another object of the present invention is to replace the ground caused by the removal of the reinforcing anchor bar, etc. by taking a means for restoring and stabilizing the rigidity of the perforated ground to its original state, so that the ground displacement caused by the voids in the perforated ground (adjacent ground) and the like. And it is to provide a dismantling removal thumbnail device for easy recovery to prevent weakening.

The present invention for achieving the above object is a dismantling and removal type nail nail device of a configuration that is attached to the body of the anchor wire rod synthetic resin pipe in advance to the body of the anchor iron bar used to construct the earth anchor by the soil nailing method or rock bolt method By providing the stiffening line of the underground grout integrated around the reinforcing anchor bar through the operation of detonating and placing the dop wire, which is a chemical product, inside the synthetic resin pipe for inlet of the dope After peeling off the grout assembly and anchor bar, the anchor bar can be easily pulled out to the ground for removal and recovery.

The present invention for achieving the above another object is to provide a small nail device configured to integrally attach to the body of the anchor bar rod filled filler injection tube for filling gaps made of a material that can be tolerated without being damaged during deflagration of the line By removing the anchor bar, at the same time, by filling and injecting the filler from the outside through the filler inlet pipe to eliminate the voids in the ground after removing the reinforcing iron bar and facilitate the drawing of the anchor bar due to the lubrication of the filler.

Figure 1a is a construction of the conventional non-removable small nail anchor body

Figure 1b is a view showing a state in which the conventional non-removable small nail anchor body is sequentially constructed in the trench

2 is a construction of the conventional removable nail nail anchor body

Figure 3 is a front view of the dismantling removal thumbnail device according to the present invention

Figure 4 is an enlarged view of the gap retaining material installation portion of the dismantling removal type thumbnail device according to the present invention

5 is a cross-sectional view taken along the line A-A of FIG.

Figure 6 is an enlarged view of the wedge stopper installation portion of the dismantling removable nail nail device according to the present invention

Figure 7 is a view showing the construction, removal and recovery procedures of the anchor body using the present invention

Figure 8 is a construction of the anchor body using the dismantling removable nail device of the present invention

Figure 9 is a state of dismantling-removal and recovery through the dismantlement-removable small nail device of the present invention.

<Description of the symbols for the main parts of the drawings>

10: Anchor iron bar 11: synthetic resin pipe

12: center holder 13: filling filler tube for void filling

14: wedge stopper 15: ties

20: earth wall 21: grout solidified

22: Acupressure plate 23: Fixing nut

24: Filling

The present invention is a basic component of the reinforcement anchor bar belonging to the basic form of the nailing method or the rock bolt method, and the synthetic resin pipe for introducing the dopant wire for crushing, crushing, peeling and deviating of the grout solidified body. The structure of the filling filling pipe for gap filling for adding the void filling (grout material) was added.

Accordingly, the present invention is a device for dismantling and removing the grout solidified body (curing mortar) surrounding the earthenware reinforcing anchor bar, and is defined as a dismantling removal nailnail device.

3 to 6 illustrate one embodiment for explaining the configuration of a small nail device according to the present invention.

The technical configuration of the present invention will be described with reference to these drawings.

The present invention reinforcement anchor bar made of required length for use in constructing earth anchors by the soil nailing method or rock bolt method in order to stabilize the walls of the ground excavated in various excavation work of civil engineering and construction (10) In the, the outer peripheral surface of the anchor iron bar 10 is mounted at least one synthetic wire pipe for the introduction of the dopant wire along the longitudinal direction, the anchor iron bar 10 is perforated in every longitudinal middle of the anchor iron bar (10) It is a basic feature of the technical configuration that the central holding material 12 for maintaining the interval to be located in the center of the inner space is installed at a predetermined interval.

In addition, the width of the line pull-in synthetic resin pipe 11 is mounted to the outer circumferential surface of the reinforcing anchor bar 10 using the one made of hard, characterized in that the lowermost inlet is blocked.

In addition, at a predetermined position of the center holding member 12 is formed a cutting groove (12a) located in a straight line up and down, characterized in that inserted into the cut-out groove (12a) by inserting the synthetic resin pipe for inlet line 11 It is done.

And, characterized in that it further comprises a configuration in which the filling filler pipe for filling gaps 13 is mounted along the longitudinal direction on the outer circumferential surface of the anchor iron bar (10).

The filling filling pipe 13 for filling the gap is characterized in that the steel pipe made of a metal material.

The lower end of the filling filling pipe 13 for filling the voids is characterized in that the wedge stopper 14 is flexibly plugged to the extent that it can be forcibly separated by the injection pressure of the grout material.

On the other hand, the small nail device of the present invention having the features as described above is a synthetic resin pipe 11 and the filling filling pipe 13 for filling gaps is mounted on the outer peripheral surface of the anchor iron bar 10 as shown in Figure 4 It is desirable to take measures by tightly binding the ties 15.

The filling filler tube 13 for filling gaps may be made of any material that can be tolerated without being damaged during deflagration of the dopant wire, and may be made of a soft material made by reinforcing an iron core therein as an example of such a member. Synthetic resin pipes.

The procedure of dismantling and removing the anchor body using the present invention after disassembly and removal of the earthen membrane is shown in Fig. 7, starting the exploding-ground drilling-inserting the dismantlement removal nail nail device according to the present invention into the perforation- Injecting grout material-Curing and construction of the next step-Performing the clogging-Starting backfill-Terminating the nut and bearing plate-Introducing the dopant wire into the synthetic resin pipe for the dopant wire introduction-Detonation of the dopant wire-Grout solidified wave, crushing, peeling and deviating action-Reinforcement anchor bar pull Removal and recovery-Filling the filling pipe into the filling tube for filling voids-Through the process of clogging and collecting.

The apparatus of the present invention constructed as described above is installed in the structure as shown in FIG. 8 to prevent displacement of the retaining wall 20 and at the same time stabilize the back ground of the retaining wall 20.

That is, the small nail device of the present invention is a grout solidified body 21 such as mortar or the like around the anchor wire rod 10 and the dopant-line retractable synthetic resin pipe 11 and the filling filler injection pipe 13 for filling gaps The construction is enclosed by the structure, the end of the anchor bar 10 exposed to the ground is fixed to the retaining wall (20) through the pressure plate 22 and the fixing nut (23). In this case, the ends of the dopant-line synthetic resin pipe 11 and the filling filling pipe 13 for filling gaps are installed to be exposed to the ground.

Then, the method of removing and recovering the anchor bar 10 by dismantling the grout solidified body 21 using the present invention after the completion of the earthen board is as follows.

First, the retaining nut 23 and the acupressure plate 22 are terminated after the end of the retaining pin is fastened to the end of the anchor bar (10).

Next, the dopant wire is introduced into the synthetic resin pipe 11 for dopant wire insertion.

Then, the depleting line is deflated to crush and grind the grout solidified body 21, thereby peeling and deviating the anchor iron bar 10 from the grout solidified body 21. At this time, the synthetic resin pipe 11 into which the dopant is introduced is completely crushed, and the filling filler injection pipe 13 for filling gaps is maintained without malfunctioning in order to withstand deflagration.

Finally, as shown in Figure 9, while pulling out the reinforcing anchor bar 10 and at the same time through the filling filling pipe 13 for filling gaps, the filling material 24, such as mortar mortar is pushed out of the anchor bar 10 Fill in the gaps caused by the coming out. At this time, the reinforcing anchor bar 10 is completely separated from the grout solidified body 21 and deviated, and can be taken out with a small force by the lubrication of the filling material being lubricated.

The present invention can easily perform the removal and recovery operation of the anchor bar 10 at the end of the retaining wall through the above process.

The present invention constituted and used as described above is established by applying the detonation technology of Dopok line, which is a field of explosives management, to earthquake technology, which is a soil and basic field, to be an effective application technology by the following cooperative principles in two technical fields.

a) Crushing and grinding of grout solidified bodies (curing mortar) by gas pressure during deflagration of chemical products.

b) Peeling action of the grout solidified body from the reinforcing bar by impact vibration during the same deflagration.

c) Deviation of the adhesion force of the grout solids due to the large pressure difference between the grout solid bodies and anchor bar at the same deflagration and the thermal gradient difference.

d) Pull-up promotion due to fluid pressure and lubrication of the filling during the backfill filling.

e) The grout solids brittle body is broken and crushed by the strong and instant detonation of the line, but the marginal detonation action inside the grout solid body without damage and strength change of anchor bar, deformation of perforated ground and other dust.

The above five principles are explained by the process of dismantling-removal / recovery.

First, after the purpose of entering the ground reinforcement anchor bar is completed, that is, at the time of filling back the completion of the underground structure, etc., the detonation line is detonated to remove and recover the reinforcing anchor bar by crushing and grinding the grout solidified body of the perforated ground. The grout solidification (curing mortar) around the reinforcing anchor bar is impact vibration and gas pressure, and the mortar solidification from the reinforcing iron rod as well as the crushing and crushing of the mortar solidified by the rapid temperature gradient. Causes delamination and deviation of colonization.

Second, by removing the reinforcing bar by the usual drawing device, while filling and filling the filling for easy removal of voids in the ground and recovery of the reinforcing bar. At this time, the filling is made by mixing cement and water in an appropriate amount, so that the durability and strength are more compounded than the condition of adjacent ground (perforated ground), that is, it is used according to the same materials and functions as in the case of ordinary grouting.

Third, the chemical product (breaking line) for crushing mortar solidified body is introduced and operated by using a synthetic resin tube when the removal and recovery of reinforcing anchor bar is needed. It is handled just like ordinary bar reinforcement and there can be no safety problem.

Fourth, the main action principle of the present invention is the rupture and grinding of the grout solidified body by the gas pressure, the peeling by the impact vibration of the iron rod, the deviation due to the difference in internal pressure and thermal inclination, but for reinforcement by such action (pressure, temperature) Since the deterioration of the steel bar can be virtually neglected (very good bar pressure and heat-resisting effect), the recovered anchor steel bar can be recycled, making it economical and not paying for the boring ground. More economical.

Fifth, when anchor rods and other components remain inserted in the ground of the perforated ground, environmental obstacles caused by underground obstacles and corrosion, in addition to the burden of occupants, caused, the present invention to remove and recover the recycle is environmentally friendly It's a technology.

The present invention as described above can be constructed in the same manner as the construction by conventional soil nailing or rock bolts, except that the synthetic resin pipe for the introduction of the wire and the filling filler pipe for filling gaps is inserted and fixed to the reinforcing iron bar, No additional skills are required, and the average masonry worker can work as easily as before without any special skills.

In addition, there is no room to harm the safety between the work or the earthenware because it is installed and working without the introduction of chemicals (depth).

When removing or recovering the reinforcing bar, it is possible to easily introduce a stiff wire of a stiff material to some extent through the synthetic resin pipe.In most earthen workshops, it is common to have an excavation engineer who is involved in the use of the wire. It can be easily put into removal and recovery work of.

Effects of the present invention according to the configuration as described above are as follows.

It is easy to remove and recover the reinforcing iron rods and provides a cheap and simple earthing method.

The land occupancy charges and disputes will not be eliminated due to the post-occupation waste disposal, and the obstacles to future construction will be eliminated fundamentally due to the existence of waste materials in the adjacent perforated (insert reinforcing bars).

It provides an environmentally friendly earthquake method that can fundamentally prevent ground displacement caused by corrosion of waste materials and voids in the ground.

It will open a new chapter in the process management of construction projects by reducing the scope of civil consultation and construction disputes.

Achieve an economical screening technique to recycle the recovered material.

As described above, the present invention ensures stable construction performance from the civil consultations for the land use of others, and removes the obstacles due to the presence of the inserted reinforcing bar, and has no effect on the ground reinforcement in the earthquake construction It is economical and environmentally beneficial without any post ground displacement, and it is also a very useful technology to ensure the affairs reduction, air shortening, and construction safety by securing and reinforcing workability.

Claims (6)

In the reinforcement anchor bar (10) made of the required length for use in constructing earth anchors by the soil nailing method or rock bolt method to stabilize the walls of the ground excavated in various excavation works of civil engineering and construction, At least one synthetic resin pipe for inlet line in the longitudinal direction is mounted on the outer circumferential surface of the anchor bar 10, and the anchor bar 10 is in the center of the perforation in each longitudinal middle of the anchor bar 10 Easy disassembly-removable small nail device, characterized in that the center holding material 12 for maintaining the interval so as to be positioned at regular intervals. The method according to claim 1, wherein the dopant line drawing synthetic resin pipe 11 is mounted to the outer peripheral surface of the reinforcing anchor bar 10 in a straight line by using a hard fabricated, and the lowermost entrance is blocked. Easy dismantling small nail device. According to claim 1 or 2, wherein the predetermined position of the center holding member 12 is formed in the cutting groove (12a) located in a straight line up and down, in the cutting groove (12a) synthetic resin pipe for the introduction 11) Easy disassembly-removable small nail device, characterized in that it is fitted by inserting 11). The method of claim 1, wherein the disassembly-removable small nail device is easy to recover, characterized in that it further comprises a configuration that the filling filling pipe 13 for filling gaps in the longitudinal direction on the outer peripheral surface of the anchor iron bar (10) . The dismantling and removing nail device according to claim 4, wherein the filling filling pipe (13) for filling gaps is a steel pipe made of a metal material. The lower end of the filling filling pipe 13 for filling gaps is provided with a wedge stopper 14 which is flexibly plugged in such a way that it can be forcibly detached by the injection pressure of the grout material. Easy disassembly-removable small nail device characterized in that.